JP2015232955A - Power storage device and temperature control device of the same, temperature adjustment system, and temperature adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that cooling performance is deteriorated by temperature rise of a cooling medium and component deterioration of a cooling medium which are caused by circulation in a liquid cooling power storage system employing a method in which the cooling medium is circulated.SOLUTION: A power storage device includes: a battery module including a rechargeable battery; a case which houses the battery module, and a pipeline provided in the case, the pipeline in which a temperature adjustment liquid for adjusting a temperature of the power storage device flows in a non-circulation manner.

Description

  The present invention relates to a power storage device, a temperature control device thereof, a temperature adjustment system, and a temperature adjustment method.

  The performance and life of a storage battery are highly dependent on temperature. For example, the storage battery generates heat during charging and discharging, and the temperature of the storage battery rises. When used in a state where the temperature of the storage battery is high, the capacity of the battery is greatly reduced and remarkably deteriorates. Conversely, when the battery is used at a low temperature, the output voltage of the storage battery decreases because the internal resistance of the storage battery increases. From the above, it is necessary to keep the temperature of the storage battery in a certain range. As a temperature adjustment mechanism, particularly a cooling system, an air cooling method, a water cooling method, a heat conduction method, and the like are known.

  For example, Patent Document 1 discloses a liquid-cooled power storage system. In this liquid-cooled power storage system, the cooling medium absorbs heat generated in the battery module and transfers the heat to the outside. The system includes a circulation pump, a tank, a heat exchanger, and the like, and cools the cooling medium collected by absorbing the heat of the battery module by heat exchange with the outside, and is provided in the tank. The cooled cooling medium is sent again to the battery module by the circulation pump.

JP 2011-23366 A

  However, in the method of circulating the cooling medium, there is a problem that the cooling performance is lowered due to the temperature increase of the cooling medium due to the circulation and the deterioration of the components of the cooling medium.

  The objective of this invention is providing the electrical storage apparatus which solves this subject, its temperature control apparatus, a temperature adjustment system, and the temperature adjustment method.

The power storage device of the present invention is a power storage device having a chargeable / dischargeable storage battery,
A battery module comprising a storage battery;
A case for housing the battery module;
And a pipe that is provided in the case and in which a temperature adjusting liquid that adjusts the temperature of the power storage device flows in a non-circulating manner.

The temperature control device of the present invention is a temperature control device in a power storage device having a non-circulating pipe through which a temperature adjusting liquid flows,
Obtaining means for obtaining information used for temperature adjustment determination;
Temperature adjustment determining means for determining whether or not temperature adjustment is necessary based on the acquired information and instructing distribution of the temperature adjustment liquid to the pipe.

The temperature adjustment system in the present invention is a temperature adjustment system of a power storage device including a storage battery,
A battery module having a storage battery;
A non-circulating pipe that circulates the temperature control liquid;
A case for housing a battery module and piping;
A temperature control device for controlling the flow of the temperature adjusting liquid;
A temperature sensor for detecting the temperature of the power storage device;
A temperature adjustment switch that controls the flow of the temperature adjustment liquid based on an instruction from the temperature control device, and the temperature control device compares the temperature information detected by the temperature sensor with an adjustment reference that defines a reference that requires temperature adjustment. Then, the necessity of temperature adjustment is determined, and the temperature adjustment switch is caused to start the distribution of the temperature adjustment liquid to the pipe.

  The temperature adjustment determination method according to the present invention uses charge / discharge information including a charge / discharge instruction to the power storage device, and distributes the temperature adjustment liquid to the non-circulating pipe through which the temperature adjustment liquid for adjusting the temperature of the power storage device flows. To decide.

  Temperature rise of the temperature adjustment liquid can be suppressed, and highly efficient temperature adjustment can be performed.

It is a figure which shows an example of the cross section of the electrical storage apparatus in this embodiment. It is a block diagram which shows one structural example of the electrical storage apparatus in this embodiment. It is a block diagram which shows an example of the function of the temperature control apparatus in this embodiment. It is a flowchart figure which shows an example of the operation | movement of the temperature adjustment in this embodiment. It is a figure which shows an example of the cross section of the electrical storage apparatus in this embodiment. It is a flowchart figure which shows an example of the operation | movement of the temperature adjustment in this embodiment. It is a figure which shows an example of the cross section of the electrical storage apparatus in this embodiment. It is a block diagram which shows one structural example of the electrical storage apparatus in this embodiment. It is a flowchart figure which shows an example of the operation | movement of the temperature adjustment in this embodiment. It is a block diagram which shows an example of the function of the temperature control apparatus in this embodiment. It is a flowchart figure which shows an example of the operation | movement of the temperature adjustment in this embodiment. It is a block diagram which shows an example of the function of the temperature control apparatus in this embodiment. It is a block diagram which shows an example of the function of the charging / discharging control apparatus in this embodiment.

Hereinafter, embodiments of the present invention will be described in detail.
[First Embodiment]
FIG. 1 is an example of a cross-sectional view of a power storage device 1 in the present embodiment. The power storage device 1 according to this embodiment includes a battery module 10, a case 11, a temperature sensor 12, a pipe 13 through which a temperature adjustment liquid can flow, a charge / discharge control device 14, a temperature control device 15, and a temperature adjustment. And a switch 16.

  In this example, a box-shaped case 11 is provided, and a battery module 10, a temperature sensor 12, a pipe 13, a charge / discharge control device 14, and a temperature adjustment switch 16 are accommodated in the case 11. The temperature control device 15 is disposed outside the case 11.

  The battery module 10 includes a storage battery (secondary battery) such as a lithium ion battery, a nickel-cadmium (Ni-Cd) battery, or a nickel metal hydride (Ni-MH) battery that can store and release electric power. The storage battery may be a metal can type or a film exterior type. The battery module 10 may be a single storage battery itself, or may be configured by connecting a plurality of storage batteries in series or in parallel according to a required output voltage. Alternatively, the battery module 10 may have a module case, and a storage battery may be arranged in the module case.

  Case 11 accommodates battery module 10. The case 11 includes a rack type, a box type, and the like, but may be any as long as it has a structure in which the battery module can be arranged inside. One or a plurality of battery modules 10 are arranged in the case 11, and the plurality of battery modules 10 are connected to each other in series or in parallel. A metal material, particularly copper or aluminum material may be used as the case material. When using a metal material, high heat dissipation is obtained. Alternatively, a resin material (ABS or the like) may be used. Weight reduction and insulation can be secured by using a resin-based material.

  In addition, the arrangement | sequence and connection method of a some storage battery and the some battery module 10 are not limited to this, It can change suitably.

  Temperature sensor 12 detects the temperature of power storage device 1. The temperature of the power storage device 1 is the temperature of the region inside the case 11 in the power storage device 1, for example, the surface of the battery module 10, the inside of the battery module, the charge / discharge control device 14 or the temperature control device 15. The surface temperature of the surface of the pipe 13. Moreover, the average temperature in the battery module 10 or the case 11 may be used instead of a specific location.

  The temperature sensor 12 includes a thermocouple, a thermistor, and the like, but is not limited thereto, and may be a general temperature sensor. Further, the places where the sensors are arranged are the surface of the battery module 10, the inside of the battery module, the surface of the charge / discharge control device 14, the surface of the pipe 13, and the like. In addition, the location where the temperature sensor 12 is disposed is not limited to this, and it is only necessary to detect the temperature of the location requiring temperature adjustment.

  In addition, the temperature sensor 12 is good to arrange | position in the position closer to the exit part 13b than the inlet part 13a of the piping 13 mentioned later among the electrical storage apparatuses 1, a position higher than an installation surface, etc. That is, it is preferable to detect the temperature at a location where the temperature is relatively high or low.

  When a temperature sensor is provided on the surface of the pipe 13, it is preferable to dispose the pipe 13 near the inlet portion 13 a and the outlet portion 13 b. By providing temperature sensors in the vicinity of the inlet portion 13a and in the vicinity of the outlet portion 13b, the temperature difference can be measured, and the temperature rise and the heat radiation amount in the power storage device 1 can be calculated.

  The power storage device 1 includes a non-circulating pipe 13 through which the temperature adjustment liquid flows. The non-circulating type here means that the temperature adjusting liquid does not circulate in the pipe 13. The temperature adjustment liquid flows into the pipe 13 from the inlet portion 13a of the pipe 13, and is discharged out of the pipe from the outlet portion 13b. That is, the inlet 13a and the outlet 13b of the pipe 13 are not connected. As a result, the temperature adjusting liquid discharged from the outlet portion 13b does not flow directly into the inlet portion 13a. The material of the pipe 13 includes stainless steel and polyethylene. Piping can function as a heat sink by using aluminum material, copper, etc. with high heat dissipation as piping material. The material of the pipe 13 is preferably subjected to a corrosion-resistant surface coating in consideration of corrosion resistance.

  For example, water or antifreeze can be used as the temperature adjusting liquid. Tap water may be used as the temperature adjusting liquid. When using tap water, it is good also as the piping 13 which connects a water supply pipe and the inlet part 13a, and connects a domestic drainage pipe and the outlet part 13b. Or you may connect the exit part 13b with the intake part of a water heater. According to such a configuration, the temperature-adjusted waste water can be reused in the water heater. When tap water is used, it becomes easy to supply cold water and hot water particularly in a house. In addition, the structure of the piping 13, the inlet part 13a, and the outlet part 13b is not limited to this. Any configuration may be used as long as the temperature adjustment liquid is discharged from the outlet 13b to the outside of the pipe 13, that is, a non-circulation type pipe.

  The pipe 13 is not limited to the shape shown in FIG. 1, and may have a shape arranged in one direction, a lattice shape, and other various configurations. The pipe 13 may be disposed adjacent to the battery module 10 or the charge / discharge control device 15. For example, the pipe 13 and at least a part of the battery module 10 and the charge / discharge control device 14 may be provided in contact with each other and connected so as to be able to transfer heat. In the case of having a plurality of battery modules 10, the pipe 13 is preferably disposed adjacent to each battery module 10. For example, the pipe 13 may be branched, and each branched branch pipe may be adjacent to each battery module 10.

  The charge / discharge control device 14 controls charge / discharge of the power storage device 1. For example, conversion of DC voltage and AC voltage, monitoring of information on the state of the battery module 10, management and control of the charge amount and discharge amount of the battery module 10, and switching of the operation mode (charge mode and discharge mode) of the power storage device 1 Etc. The charge / discharge control device 14 is connected to the battery module 10 and the temperature control device 15 via a communication line.

  The temperature control device 15 controls the temperature adjustment of the power storage device 1. For example, information detected by the temperature sensor 12 and information on the temperature adjustment result are managed, and the temperature adjustment switch 16 is monitored and controlled. The temperature control device 15 is connected to the temperature sensor 12 and the temperature adjustment switch 16 via a communication line.

  In this example, the charge / discharge control device 14 and the temperature control device 15 are provided separately, and the temperature control device 15 is disposed outside the case. However, the present invention is not limited to this. For example, the charge / discharge control device 14 and the temperature control device 15 may be integrally disposed inside or outside the case 11. Alternatively, the charge / discharge control device 14 and the temperature control device 15 may be provided separately for each function.

  In addition, you may provide the charging / discharging control apparatus 14 and the temperature control apparatus 15 as external apparatuses (server etc.). In this case, one of the charge / discharge control device 14 and the temperature control device 15 may be provided as an external device, or at least one of the functions of the charge / discharge control device 14 and the temperature control device 15 is provided as an external device. Also good. In this case, the power storage device 1 can have functions other than those provided as external devices.

  The temperature adjustment switch 16 opens and closes the inlet 13 a of the pipe 13 in accordance with an instruction from the temperature control device 15 and controls the flow of the temperature adjustment liquid to the pipe 13. The type of the temperature adjustment switch 16 is not particularly limited, and a general water tap such as a water tap of JIS B2061 can be used. It can also be realized by a system in which a fluid reservoir is supplied by an electric pump.

  FIG. 2 shows a functional block diagram of the power storage device 1 in the present embodiment.

  The battery module 10 has at least one storage battery. A plurality of battery modules 10 may be connected in series or in parallel to form an assembled battery.

  The charge / discharge control device 14 is connected to the battery module 10 so as to be communicable. The charge / discharge control device 14 comprehensively controls the charge / discharge of the power storage device 1 as described above. The charge / discharge control device controls charging of the battery module 10 or discharging from the battery module 10 based on a charge / discharge request acquired from the outside.

  The input / output terminal 19 includes a first terminal 19a and a second terminal 19b. For example, the first terminal may be connected to the positive electrode of the battery module 10 and the second terminal may be connected to the negative electrode of the battery module 10. When a plurality of battery modules 10 are connected to each other to form an assembled battery, the electrodes of the plurality of battery modules 10 may be connected to connection terminals, and the connection terminals and the input / output terminals 19 may be connected.

  Temperature sensor 12 detects the temperature of power storage device 1. The temperature sensor 12 is communicably connected to the temperature control device 15 and transmits the detected temperature information to the temperature information control device 15.

  As described above, the temperature control device 15 comprehensively controls the temperature adjustment of the power storage device 1. For example, the necessity of temperature adjustment is determined according to the information acquired from the temperature sensor 12, and a control instruction is transmitted to the temperature adjustment switch 16 via the communication line.

  The temperature adjustment switch 16 includes a temperature adjustment switch control unit 16a that receives a control instruction from the temperature control device 15 and controls the inflow of the temperature adjustment liquid. That is, the temperature adjustment switch control unit 16 a instructs opening / closing of the temperature adjustment switch 16 according to the control instruction acquired from the temperature control device 15. For example, when the control instruction is cooling, the temperature adjustment switch control unit 16a selects the cooling temperature adjustment liquid, and when the control instruction is heating, the temperature adjustment switch control unit 16a selects the heating temperature adjustment liquid. Opening and closing may be controlled. The temperature adjustment switch 16 is opened and closed by the control, and the temperature adjustment liquid enters and exits.

  FIG. 3 shows an example of a functional block diagram of the temperature control device 15 in the present embodiment. The temperature control device 15 in the present embodiment includes an acquisition unit 50, a temperature adjustment determination unit 51, and a notification unit 52.

  The acquisition unit 50 acquires information used for adjustment determination. The acquisition unit 50 in the present embodiment includes a temperature information acquisition unit 50a, and acquires temperature information detected by the temperature sensor 12. The temperature information is information indicating the temperature in the power storage device 1.

  The temperature information acquisition unit 50 a transmits the acquired temperature information to the temperature adjustment determination unit 51.

  The temperature adjustment determination unit 51 determines whether or not temperature adjustment is necessary based on the temperature information. The temperature adjustment determination unit 51 determines whether or not temperature adjustment is necessary with reference to the temperature indicated by the temperature information and a predetermined adjustment standard.

  The adjustment standard defines a standard for determining whether or not temperature adjustment is necessary. For example, a range that requires temperature adjustment may be defined. For example, the operating temperature range of the storage battery, the appropriate storage temperature range, the operating temperature range of the circuit components mounted on the charge / discharge control device 14, and the like can be used. The adjustment reference may be set for each temperature sensor 12 and for each detection target (battery module 10, charge / discharge control device 14, case 11, pipe 13) of the temperature sensor 12.

  The method by which the temperature adjustment determination unit 51 acquires the adjustment reference is not particularly limited. For example, the temperature adjustment determination unit 51 may hold an adjustment reference in advance. Alternatively, a storage unit (not shown) included in the temperature control device 15 may hold the adjustment reference, and the temperature adjustment determination unit 51 may acquire the adjustment reference from the storage unit. Alternatively, the temperature information acquisition unit 50a refers to the temperature information, and acquires an adjustment reference corresponding to the temperature sensor 12 that is the transmission source of the temperature information or the temperature detection location of the temperature sensor 12 from the storage unit included in the temperature control device 15 or an external device. May be. The temperature information acquisition unit 50a transmits the acquired adjustment reference to the temperature adjustment determination unit.

  For example, when the temperature indicated by the temperature information is close to the temperature that promotes the deterioration of the battery module 10, the temperature adjustment determination unit 51 determines that the cooling is necessary. Alternatively, when the temperature information indicates a lower limit temperature at which the battery performance cannot be exhibited, the temperature adjustment determination unit 51 determines that heating is necessary.

  The temperature adjustment determination unit 51 generates an adjustment signal including whether or not the determined temperature adjustment is necessary. The adjustment signal may be a signal indicating an instruction to open / close the temperature adjustment switch 16. Further, it may be a signal including the determined adjustment condition. For example, the adjustment signal may be a signal indicating that the temperature adjustment switch 16 is released until the next determination of whether or not temperature adjustment is necessary. The temperature adjustment determination unit 51 transmits an adjustment signal to the notification unit 52.

  The notification unit 52 communicates with the temperature adjustment switch control unit 16 via the communication line 17, and the notification unit 52 transmits an adjustment signal to the temperature adjustment switch control unit 16. Furthermore, communication with the external device of the charge / discharge control device 14 or the power storage device 1 may be performed via the communication line 17. The charge / discharge control device 14 or the external device that has acquired the adjustment signal may display the result of determining whether or not temperature adjustment is necessary on the display unit.

  An example of the operation in this embodiment will be described using the flowchart of FIG.

  In S101, the temperature sensor 12 detects the temperature of the power storage device 1, and transmits temperature information including the detected temperature to the temperature information acquisition unit 50a. The temperature information acquisition unit 50 a transmits the received temperature information to the temperature adjustment determination unit 51.

  In S102, the temperature adjustment determination unit 51 refers to the acquired temperature information with a predetermined adjustment reference, and determines whether or not temperature adjustment is necessary. If it is determined that the temperature adjustment is unnecessary, the temperature adjustment is terminated.

  In S103, the temperature adjustment determination unit 51 generates an adjustment signal including whether or not the determined temperature adjustment is necessary. The temperature adjustment determination unit 51 transmits the generated adjustment signal to the notification unit 52. The notification unit 52 transmits the acquired adjustment signal to the temperature adjustment switch control unit 16. Alternatively, the notification unit 52 may transmit the adjustment signal to the charge / discharge control device 14 or an external device (such as a server). Note that, when the temperature adjustment switch 16 is not required to be controlled, for example, temperature adjustment is not necessary, the notification unit 52 may not transmit an adjustment signal to the temperature adjustment switch 16. The temperature adjustment switch 16 starts to flow in the temperature adjustment liquid according to the adjustment signal.

  By generating and transmitting the adjustment signal, the temperature adjustment in the temperature control device 15 is finished.

  In the above description, the example in which the necessity of temperature adjustment is determined using a predetermined adjustment reference has been described. However, the adjustment reference may be generated when the temperature adjustment is determined without holding the adjustment reference in advance.

  Although the example in the case of using the adjustment reference | standard which defined the range which requires temperature adjustment was demonstrated above, it is not limited to this. The adjustment reference may be, for example, a reference point that requires temperature adjustment. Alternatively, a range that does not require temperature adjustment may be defined.

  According to the present embodiment, it is possible to control the power storage device 1 by circulating the temperature adjustment liquid through the non-circulating pipe. According to such this embodiment, temperature adjustment with high efficiency which can suppress the temperature rise of the temperature adjustment liquid can be performed.

  According to this embodiment, the liquid is used as the temperature adjustment liquid. According to the present embodiment, the temperature gradient in the pipe is reduced by the flow of the liquid, so that the temperature adjustment can be performed more efficiently than the temperature adjustment by gas. Furthermore, the temperature can be adjusted more effectively by using a liquid having a specific heat higher than that of air as the temperature adjusting liquid.

  Moreover, according to this embodiment, tap water can be used as a temperature control liquid. According to such this embodiment, the water pipe is divided to flow into the pipe 13 and is discharged from the pipe 13 to the domestic water drain pipe, or the outlet 13b is connected to the water intake of the water heater. The wastewater can be reused by connecting to the temperature control liquid.

[Second Embodiment]
The present embodiment is different from the first embodiment in that the temperature adjustment determination unit 51 can further determine an adjustment condition indicating a condition for the flow of the temperature adjustment liquid into the pipe 13. The adjustment conditions are an inflow amount necessary for temperature adjustment, an inflow time, a degree of release of the temperature adjustment switch 16, and the like.

  FIG. 5 shows an example of a cross-sectional view of the power storage device 1 in the present embodiment.

  The pipe 13 in this example branches into a plurality. For example, a plurality of branch pipes are branched in the case 11 and each branch pipe is located before the outlet section 13b (on the inlet section 13a side) for each temperature adjustment point (battery module 10, charge / discharge control device 14, etc.). May join.

  The plurality of branch pipes are provided at positions corresponding to each of the plurality of battery modules 10. That is, the battery module 10 and the diversion pipe are provided alternately in the case 11.

  In the above example, the case where the branch point of the pipe 13 is in the case 11 has been described. However, the present invention is not limited to this, and the pipe 13 may branch outside the case 11. Alternatively, a plurality of pipes 13 may be provided. The number of branches and the number of pipes can be changed as appropriate according to the size of the power storage device 1, the number of temperature adjustment points, and the amount of temperature adjustment liquid.

  The plurality of temperature adjustment switches 16 are provided at positions corresponding to the plurality of branch flow pipes, and control the inflow of the temperature adjustment liquid into each branch pipe. For example, the plurality of temperature adjustment switches 16 may be arranged for each branch point of the pipe 13 to be branched.

  Alternatively, the temperature adjustment switch 16 may be provided in the vicinity of the temperature adjustment location and before the inflow direction. The arrangement location of the temperature adjustment switch 16 is not limited to the above, and may be arranged at a location where the flow of the temperature adjustment liquid to each location where temperature adjustment is necessary can be controlled. By providing a plurality of temperature adjustment switches 16, it is possible to perform temperature adjustment for each battery module and for each part that requires temperature adjustment for each charge / discharge control device 15. In this case, it is more preferable to provide a temperature sensor 12 at each temperature adjustment location corresponding to each branch pipe.

  The flow sensor 18 detects the inflow amount of the temperature adjustment liquid flowing into the pipe 13. By providing the flow sensor 18, the amount of inflow can be controlled more accurately. As the flow sensor 18, a general differential pressure flow meter or an impeller type can be used.

  An example of the operation in this embodiment is shown in the flowchart of FIG.

  In S201, the temperature sensor 12 detects the temperature of the power storage device 1, and transmits temperature information including the detected temperature to the temperature information acquisition unit 50a. The temperature information acquisition unit 50 a transmits the received temperature information to the temperature adjustment determination unit 51.

  In S202, the temperature adjustment determination unit 51 refers to the acquired temperature information with a predetermined adjustment standard, and determines whether or not temperature adjustment is necessary. If it is determined that the temperature adjustment is unnecessary, the temperature adjustment is terminated.

  In S203, when it is determined that temperature adjustment is necessary, the temperature adjustment determination unit 51 determines an adjustment condition based on the temperature information. The adjustment conditions are an inflow amount necessary for temperature adjustment, an inflow time, a degree of release of the temperature adjustment switch 16, and the like. The closer the temperature indicated by the temperature information is to the upper limit value or lower limit value of the adjustment reference, the larger the inflow amount may be set, or the inflow time of the temperature adjustment liquid may be set longer.

  The temperature information detected by the plurality of temperature sensors 12 can be used to determine the necessity of temperature adjustment and the adjustment conditions for each temperature detection location. For example, the amount of inflow may be set higher as the temperature indicated by the temperature information is higher. Thereby, the temperature difference for every temperature adjustment location can be reduced.

  Furthermore, the temperature distribution by the arrangement position of the temperature adjustment location may be predicted in advance using the temperature information detected by the plurality of temperature sensors 12. The inflow amount of the temperature adjusting liquid can be determined based on the predicted temperature distribution. By setting the flow rate of the temperature adjustment liquid based on the temperature distribution, temporal changes in the temperature distribution can be suppressed.

  In S <b> 204, the temperature adjustment determination unit 51 generates an adjustment signal including an adjustment condition and transmits the adjustment signal to the temperature adjustment switch control unit 16. If temperature adjustment is unnecessary, the process may be terminated without generating an adjustment signal.

  The temperature adjustment determination unit 51 may determine whether or not to continue temperature adjustment based on the acquired temperature information (S205). After the inflow of the temperature adjustment liquid based on the temperature adjustment condition is completed, the temperature information acquisition unit 50a can acquire the temperature information again and determine whether or not to continue the temperature adjustment. When it is determined that the temperature adjustment is necessary, the steps from S202 to S205 are executed again. If it is determined that the temperature adjustment is not necessary, the temperature adjustment is terminated.

  If it is not necessary to continue the temperature adjustment, the temperature adjustment in the temperature control device 15 is terminated.

  Note that the temperature adjustment determination unit 51 may transmit an end signal indicating that the temperature adjustment is unnecessary to the notification unit 52. The notification unit 52 transmits an end signal to the temperature adjustment switch 16. The temperature adjustment switch 16 that has received the adjustment signal ends the flow of the temperature adjustment liquid into the pipe 13. The notification unit 52 may transmit an adjustment signal to the charge / discharge control device 14 or an external device (such as a server). When the temperature adjustment switch 16 automatically terminates the flow of the temperature adjustment liquid based on the adjustment condition indicated by the adjustment signal, the notification unit 52 does not need to transmit an end signal to the temperature adjustment switch 16.

  When the steps from S202 to S205 are repeated a plurality of times (for example, 20 times or more), the temperature adjustment determination unit 51 may generate an abnormality signal and transmit it to the notification unit 52. The notification unit 52 may transmit an abnormal signal to the charge / discharge control device 14 or an external device. The charge / discharge control device 14 that has acquired the abnormal signal may stop charging or discharging.

  When the step of S204 or S205 is finished, the processing in the temperature control device 15 is finished.

  The temperature adjustment switch control unit 16 acquires an adjustment signal and an end signal including adjustment conditions from the temperature control device 15. The flow of the temperature adjustment liquid is controlled according to the acquired adjustment conditions. For example, the inflow of the temperature adjustment liquid is started with the inflow amount indicated by the adjustment condition. Or when the inflow time which adjustment conditions show, or when the completion | finish signal is acquired, the inflow port 13a of the piping 13 may be closed and inflow may be complete | finished. The inflow amount detected by the flow sensor 18 and the inflow amount indicated by the adjustment condition may be compared and reflected in the degree of release of the temperature adjustment switch 16.

  According to the present embodiment as described above, the same effects as those of the first embodiment can be obtained.

  Further, according to the present embodiment, it is possible to determine the adjustment condition for each temperature adjustment location, and control the inflow of the temperature adjustment liquid for each temperature adjustment location with the temperature adjustment switch. According to this embodiment, temperature adjustment can be performed for each battery module 10, charge / discharge control device 14, and module selection unit 20.

According to this embodiment, the adjustment condition indicating the inflow condition of the temperature adjustment liquid is determined based on the temperature information, and the temperature sensor 12 controls the inflow of the temperature adjustment liquid according to the adjustment condition. According to this embodiment, even when the difference between the temperature in the power storage device 1 detected by the temperature sensor 12 and the temperature indicated by the adjustment reference is large, the temperature in the power storage device 1 is quickly set to an appropriate temperature range. It is possible to fit in. Further, when the difference between the temperature in the power storage device 1 and the temperature indicated by the adjustment reference is small, excessive cooling or heating can be prevented.
[Third Embodiment]
Depending on the application of the power storage device 1, it is desirable to increase the current that can be extracted from the power storage device 1. In such a case, the current taken out from the power storage device 1 can be increased by discharging the storage battery at a predetermined discharge rate or higher.

  By the way, the battery has an internal resistance. Generally, the higher the temperature, the lower the internal resistance, and when the temperature decreases, the battery rapidly increases. For this reason, when the battery module 10 discharges a large amount of power in a low temperature state, the output voltage may drop rapidly. In addition, when discharging at a high current value, a voltage drop occurs in the battery, and the voltage that can be output to the outside decreases. At this time, the accumulation of heat generated by the current flowing through the internal resistance is one of the causes of deterioration of the storage battery. As described above, the temperature management of the storage battery is important in order to provide high power continuously while suppressing the deterioration of the storage battery.

  Therefore, in the present embodiment, a temperature adjustment mechanism in the power storage device 1 that continuously provides a large current is provided.

  FIG. 7 shows an example of the power storage device 1 in the present embodiment. FIG. 7 is an example of a cross-sectional view of the power storage device 1 in the present embodiment. The power storage device 1 according to this embodiment includes a plurality of battery modules 10, a case 11, a temperature sensor 12, a pipe 13 through which a temperature adjustment liquid can flow, a charge / discharge control device 14, a temperature control device 15, A temperature adjustment switch 16 and a module selection unit 20 are provided.

  The battery module 10 is configured by combining a plurality of storage batteries in series, in parallel, or in series-parallel. A plurality of battery modules 10 are connected in series or in parallel to form an assembled battery.

  The module selection unit 20 selects at least one of the plurality of battery modules 10 and connects it to the input / output terminal 19. The plurality of battery modules 10 are connected to each other via connection terminals, and the connection terminals and the module selection unit 20 are connected. The module selection unit 20 has a switch element for each battery module 10, for example. Examples of the switch element include a power transistor, a semiconductor switch, and a mechanical switch. The battery module 10 connected to the input / output terminal 19 is selected by controlling on / off of the plurality of switch elements.

  The charge / discharge control device 14 is connected to the battery module 10 and the module selection unit 20 so as to communicate with each other. The charge / discharge control device 14 controls the module selection unit 20. For example, the module selection unit 20 is instructed about the battery module 10 to be connected to the input / output terminal 19 and the number to be connected.

  The pipe 13 is preferably arranged at a position where each temperature adjustment point can be adjusted. For example, the branched branch pipes in the case 11 may be arranged in the vicinity of the temperature adjustment points such as the plurality of battery modules 10, the charge / discharge control device 14, and the module selection unit 20. When the temperature adjustment point and the pipe 13 are provided in contact with each other, higher temperature adjustment efficiency can be obtained. By providing the piping 13 in the vicinity of the battery module 10, the temperature of the battery module 10 can be kept within a certain range, and a sudden drop in voltage or deterioration due to heat generation can be prevented. Further, by providing the pipe 13 in the vicinity of the charge / discharge control device 14 and the module selection unit 20, malfunction due to heat generation can be prevented.

  The temperature adjustment switch 16 may be provided for each branch point. The inflow of the temperature adjustment liquid to each temperature adjustment location can be controlled.

  In FIG. 7, the charge / discharge control device 14, the temperature control device 15, and the module selection unit 20 are described as independent devices, but are not limited thereto. These may be physically separated from each other, or at least a part thereof may be integrally formed in any combination.

  FIG. 8 shows an example of a functional block diagram of the power storage device in the present embodiment.

  The battery module 10 has at least one storage battery. A plurality of battery modules 10 may be connected in series or in parallel to form an assembled battery. A plurality of battery modules 10 constitute an assembled battery, and each of the plurality of battery modules 10 is connected to each other via a connection terminal.

  The charge / discharge control device 14 controls the module selection unit 20. For example, the charge / discharge control device 14 determines the number of battery modules 10 connected to the input / output terminal 19. The charge / discharge control device 14 switches the battery module 10 selected by the module selection unit 20 while continuously discharging from the input / output terminal 19. Further, the same battery module may be repeatedly selected with a time interval. The charge / discharge control device 14 selects the battery module 10 to be connected to the input / output terminal 19 by controlling on / off of the switch element included in the module selection unit 20.

  Note that the charge / discharge control device 14 may communicate with the battery module 10 to obtain the battery voltage, charge / discharge current, and charge / discharge time. Charge / discharge time and charge / discharge energy can be calculated from the acquired values.

  As described above, the module selection unit 20 selects a predetermined number of battery modules 10 from the plurality of battery modules 10 in accordance with instructions from the charge / discharge control device 14 and connects them to the input / output terminals. The number of battery modules 10 simultaneously selected by the module selection unit 20 may be one or plural. When the module selection unit 20 selects a plurality of battery modules 10 at the same time, the plurality of battery modules may be connected in series with each other or may be connected in parallel with each other.

  The input / output terminal 19 includes a first terminal 19a and a second terminal 19b. In this example, the module selection unit 20 connects the battery module 10 and the first terminal 19a. The second terminal 19b is always connected to the battery module 10.

  Next, operations of the charge / discharge control device 14 and the module selection unit 20 will be described. FIG. 9 is a flowchart showing an example of the operation of the power storage device 1 according to this embodiment.

  First, the charge / discharge control unit 14 determines the selection order of the battery modules 10 (step S301). The charge / discharge control unit 14 may determine the selection order of the battery modules 10 according to the arrangement of the battery modules 10, for example. Or you may determine the selection order of a battery module by reading the table which defined the selection order. The table that defines the selection order may be held by a storage unit included in the charge / discharge control device 14, or may be held by an external device outside the power storage device 1.

  Furthermore, the charge / discharge control unit 14 determines a switching reference indicating a reference for executing switching of the battery module 10. (Step S302).

  For example, the discharge time of each battery module 10 may be determined, and when the discharge time elapses, the battery module 10 may be switched to the next. In this case, the discharge time may be the same value for all the battery modules 10, and the discharge time is determined for each battery module 10 based on the battery state (for example, temperature, voltage, current, or remaining amount) of the battery module 10. May be. The discharge time is 1 second or less, more preferably 0.5 seconds or less.

  Alternatively, the discharge stop voltage Vs may be determined based on the battery state (temperature, voltage, current) of the battery module 10. When the voltage of each battery module 10 is smaller than the discharge stop voltage Vs, the battery module may stop discharging and the next battery module may start discharging.

  Next, the charge / discharge control device 14 controls the module selection unit 20 to select a battery module based on the selection order (step S303). The module selection unit 20 connects the selected battery module 10 and the input / output terminal 19 and starts discharging (step S304).

  Then, the charge / discharge control device 14 determines whether a predetermined standard (discharge amount, discharge time) is satisfied (step S305). If the standard is not satisfied, the process from S302 to S304 is repeated and the discharge is continued.

  In addition, although the example which switches the battery module 10 in the predetermined selection order was demonstrated above, it is not limited to this. The selection order may be determined in advance, or may be appropriately determined depending on the deterioration state of the storage battery, SOC, temperature, voltage, and the like.

  Note that the order of S301 and S302 may be reversed.

  The temperature control device 15 operates in the same manner as in the first and second embodiments.

  According to the present embodiment, the same operational effects as those of the first and second embodiments can be obtained.

  Further, according to the present embodiment, the temperature can be adjusted in the power storage device 1 that discharges a large amount of power. According to this embodiment, since the temperature in the power storage device 1 can be kept within a certain range, the value of the internal resistance of the storage battery can be maintained at a certain value.

  According to the present embodiment, it is possible to control the flow of the temperature adjustment liquid for each temperature adjustment location using the plurality of temperature adjustment switches 16. According to such this embodiment, since temperature adjustment can be performed for every battery module 10, the charging / discharging control apparatus 14, and the module selection part 20, fine temperature adjustment can be performed.

[Fourth Embodiment]
The internal resistance of the storage battery greatly depends on the temperature. When the temperature is high, the internal resistance is small, and when the temperature is low, the internal resistance is greatly increased. For this reason, in order to output at a desired voltage while suppressing deterioration of the storage battery, it is necessary to keep the battery module 10 at an appropriate temperature during charging and discharging and to set the internal resistance to a constant value. Therefore, in the present embodiment, when charge / discharge information is acquired, a determination as to whether or not temperature adjustment is necessary is started. In other words, the temperature is adjusted before starting charge / discharge.

  FIG. 10 shows an example of a functional block diagram of the temperature control device 15 in the present embodiment. The temperature control device 15 in the present embodiment is different from the first and second embodiments in that the acquisition unit 50 includes a discharge information acquisition unit 50b. Note that functions different from those of the first to third embodiments will be described, and descriptions of common functions will be omitted as appropriate.

  The discharge information acquisition unit 50 b acquires charge / discharge information indicating a charge / discharge instruction to the power storage device 1. Further, the charge / discharge information may be information including charge / discharge conditions including at least the output (A, V, W) of the storage battery. The charge / discharge conditions may include information such as the discharge time and the load at the discharge destination in addition to the output of the storage battery. The charge / discharge instruction may be a charge / discharge schedule indicating the time for charging and discharging. In the case of the power storage device 1 that discharges a large amount of power, the selection order and switching criteria of the battery modules 10 may be acquired as charge / discharge information.

  The means by which the discharge information acquisition unit 50b acquires the charge / discharge instruction is not limited. For example, the charge / discharge control device 15 may transmit a charge / discharge instruction to the temperature control device 16, and the discharge information acquisition unit 50b may acquire the charge / discharge instruction. Alternatively, an external device (such as a server) may generate a charge / discharge instruction, transmit the charge / discharge instruction to the temperature control device 15, and the charge / discharge information acquisition unit 50b may acquire the charge / discharge instruction.

  The temperature adjustment determination unit 51 determines whether or not temperature adjustment is necessary based on the charge / discharge information, and performs temperature adjustment before the start of charge / discharge when it is determined that temperature adjustment is necessary. For example, the temperature adjustment determination unit 51 determines whether or not temperature adjustment is necessary when the charge / discharge information is acquired. As another example, it is assumed that charging / discharging information (such as a charging / discharging schedule) including charging / discharging start time information is acquired. When the charge / discharge information approaches the charge or discharge start time (for example, 10 minutes before or 30 minutes before), the temperature adjustment determination unit 51 starts determining whether or not temperature adjustment is necessary.

  The temperature adjustment determination unit 51 determines whether or not temperature adjustment is necessary based on the charge / discharge information. The temperature adjustment determination unit 51 compares the acquired information with a predetermined adjustment reference, and determines whether or not temperature adjustment is necessary. The adjustment reference may be a reference that defines whether or not temperature adjustment is required in charging or discharging, for example. Specifically, it may be defined that temperature adjustment is necessary when the charge / discharge information indicates a charge instruction. Or the temperature range for fully exhibiting battery performance may be sufficient. Alternatively, the operating temperature range of the charge / discharge control device 14 or the module selection unit 20 may be used.

  The temperature adjustment determination unit 51 may determine whether or not temperature adjustment is necessary for a portion that operates by charging and discharging. For example, when charging / discharging information indicating a charging / discharging instruction for a specific battery module 10 is acquired, a location related to charging / discharging (for example, the battery module 10 to be charged / discharged, the charge / discharge control device 14, and the battery module 10 adjacent thereto). The temperature information may be acquired for and the necessity of temperature adjustment may be determined.

  The temperature adjustment determination unit 51 can further determine an adjustment condition indicating the inflow condition of the temperature adjustment liquid into the pipe 13. For example, a larger inflow amount may be set as the temperature indicated by the temperature information is higher. Alternatively, as the discharge start time indicated by the charge / discharge instruction is closer to the temperature adjustment start time, a larger inflow amount may be set and the temperature adjustment time may be shortened.

  FIG. 11 is a flowchart illustrating an example of temperature adjustment processing of the power storage device 1 by the temperature adjustment device. Here, as the charge / discharge information, when the charge / discharge information is acquired, both the flow for determining whether or not temperature adjustment is necessary using the temperature information and the flow for determining whether or not temperature adjustment is necessary using the charge / discharge information are included. explain.

  First, a flow for determining whether or not temperature adjustment is necessary using temperature information when charge / discharge information is acquired as charge / discharge information will be described.

  In S401, the charge / discharge information acquisition unit 50b acquires charge / discharge information. The charge / discharge information acquisition unit 50 b transmits the charge / discharge information to the temperature adjustment determination unit 51. Further, the temperature information acquisition unit 50a may be instructed to start acquiring temperature information. For example, it is assumed that the charge / discharge information is information instructing discharge of a specific battery module 10. In this case, the charge / discharge information acquisition unit 50b may instruct the temperature information acquisition unit 50a to acquire the temperature information of the battery module 10 instructed to discharge.

  In S402, the temperature information acquisition unit 50a acquires temperature information indicating the temperature of the power storage device 1 detected by the temperature sensor 12. The temperature information acquisition unit 50 a transmits the acquired temperature information to the temperature adjustment determination unit 51.

  The timing at which the temperature information acquisition unit 50a acquires the temperature information is not particularly limited. For example, the temperature information acquisition unit 50a may appropriately acquire the temperature information detected by the temperature sensor 12 at a predetermined timing (every 1 second, every 30 seconds, every minute, etc.). Or the temperature information acquisition part 50a may acquire temperature information, when the instruction | indication of temperature information acquisition start is acquired from the charging / discharging information acquisition part 50b.

  Note that the order of S401 and S402 may be reversed.

  In S403, the temperature adjustment determination unit 51 starts determining whether or not temperature adjustment is necessary when the charge / discharge information is acquired. Further, temperature information may be acquired. The temperature adjustment determination unit 51 determines whether temperature adjustment is necessary based on at least one of temperature information and charge / discharge information. The temperature adjustment determination unit 51 compares at least one of the temperature information and the charge / discharge information with a predetermined reference, and determines that the temperature adjustment is necessary when it is out of the reference range.

  In S <b> 404, the temperature adjustment determination unit 51 determines an adjustment condition indicating a condition for the temperature adjustment liquid to flow into the pipe 13.

  In step S405, the temperature adjustment determination unit 51 generates an adjustment signal including whether or not the determined temperature adjustment is necessary. When it is determined that temperature adjustment is necessary, the adjustment signal may be a signal including the determined adjustment condition. The temperature adjustment determination unit 51 transmits the generated adjustment signal to the notification unit 52. The notification unit 52 transmits the acquired adjustment signal to the temperature adjustment switch 16. The temperature adjustment switch 16 starts to flow in the temperature adjustment liquid according to the adjustment signal.

  In S406, after the inflow of the temperature adjustment liquid based on the adjustment condition is completed, the temperature adjustment determination unit 51 determines whether or not it is necessary to continue the temperature adjustment.

  The temperature information acquisition part 50a acquires the temperature information which shows the temperature of the location which performed temperature adjustment at least among the temperature information which the temperature sensor 12 detected. The temperature information acquisition unit 50 a transmits the acquired temperature information to the temperature adjustment determination unit 51. The temperature adjustment determination unit 51 determines whether or not to continue temperature adjustment based on the acquired temperature information. If it is determined that continuation is necessary, steps S404 to S406 are executed again. If it is determined that the temperature adjustment is not necessary, the temperature adjustment is terminated.

  The step of S406 may be executed when the charging or discharging time indicated by the charging / discharging information is approaching (for example, 5 minutes before, 1 minute before, etc.). If the temperature indicated by the temperature information does not meet the adjustment standard even when the charging or discharging time approaches, it may be determined that the temperature adjustment needs to be continued. In this case, the adjustment condition may be updated so as to increase the inflow amount in steps S403 to S406 to be executed again.

  When the temperature adjustment is completed, the temperature adjustment determination unit 51 transmits an end signal indicating the end of the temperature adjustment to the notification unit 52. The end signal may be a signal including a charge / discharge instruction to power storage device 1.

  When steps S403 to S406 are repeated a plurality of times (for example, 20 times or more), temperature adjustment determination unit 51 may determine that power storage device 1 is abnormal and generate an abnormality signal.

  The notification unit 52 transmits an end signal to the temperature adjustment switch 16. The temperature adjustment switch 16 that has received the end signal stops the flow of the liquid into the pipe 13.

  Further, the notification unit 52 transmits an end signal or an abnormality signal to the charge / discharge control device 14. Furthermore, an end signal or an abnormality signal may be transmitted to an external device (such as a server or an electric device). The external device may output the received end signal or abnormality signal to the output unit to notify the user of the temperature adjustment status.

  In S <b> 407, the charge / discharge control device 14 receives an end signal or an abnormality signal from the notification unit 52. The charge / discharge control device 14 can execute a charge / discharge instruction when an end signal is acquired. Alternatively, charging / discharging control device 14 may start charging / discharging of power storage device 1 in accordance with a charging / discharging instruction included in the end signal. When the abnormality signal is received, the charge / discharge control device 14 may reject the charge / discharge instruction.

  According to the present embodiment, it is possible to achieve the same operational effects as the first to third embodiments.

  Moreover, according to this embodiment, when charge / discharge information is acquired, the necessity determination of the necessity of temperature adjustment is started. In other words, the temperature is adjusted before starting charge / discharge. According to such this embodiment, it can output from the electrical storage apparatus 1 with a desired voltage, suppressing deterioration of a storage battery. In particular, when discharging a large amount of power, the output voltage may drop sharply. According to this embodiment, since discharge in a low temperature state can be prevented, it is possible to suppress a rapid decrease in output voltage when discharging a large amount of power.

  Further, according to the present embodiment, when the charging or discharging time indicated by the charging / discharging information approaches, the adjustment condition can be updated so as to increase the inflow amount. According to the present embodiment as described above, it is possible to prevent a delay in charging / discharging start due to the temperature adjustment.

[Fifth Embodiment]
In the first to fourth embodiments, the case where the necessity of temperature adjustment is determined based on the temperature information and the adjustment condition is determined has been described. However, in this case, it is impossible to prevent the temperature rise by flowing the temperature adjusting liquid before the temperature rises. In addition, since the amount of heat generated varies depending on discharge conditions such as output and output time, temperature information may be insufficient when determining whether or not temperature adjustment is necessary before charging and discharging. Therefore, in this embodiment, the necessity of temperature adjustment is determined using the charge / discharge conditions indicated by the charge / discharge information.

  An example of a functional block diagram of the temperature control device in the present embodiment is shown in FIG. 7 as in the third embodiment. The functions of the temperature information acquisition unit 50a and the notification unit 52 are the same as those in the first to third embodiments. Hereinafter, functions different from those in the first to third embodiments will be described, and descriptions of functions common to the first to third embodiments will be omitted as appropriate.

  The temperature adjustment determination unit 51 compares the charge / discharge conditions indicated by the charge / discharge information with the adjustment reference, and determines whether or not temperature adjustment is necessary. The adjustment reference may be, for example, a reference that defines charge / discharge conditions that require temperature adjustment as a range that requires temperature adjustment. Specifically, the temperature adjustment determination unit 51 may determine that temperature adjustment is necessary when the output, output time, and battery capacity indicated by the charge / discharge conditions exceed a certain value.

  Or the information which shows the state of the battery module 10 may be acquired as charging / discharging conditions, and the necessity of temperature adjustment may be judged. For example, the battery module 10 has been used for a certain period of time, the number of times of charging / discharging, the degree of deterioration determined from the voltage and current of the battery module, the internal resistance value of the battery module 10 and the like as the charging / discharging conditions. The module 10 may determine that temperature adjustment is necessary.

  Alternatively, the resistance of the load at the discharge destination may be acquired, a necessary output may be calculated from the acquired resistance, and the necessity of temperature adjustment may be determined based on the calculated output. For example, in the power storage device 1 that supplies power to the hot water supply facility, when the water in the hot water supply facility is heated by the supplied power, the temperature of the water to be heated or the heating target temperature may be acquired as charge / discharge information. The temperature adjustment determination unit 51 may determine that the temperature adjustment is necessary when the temperature of the water or the target heating temperature is outside the reference range. Alternatively, the discharge output, the discharge amount, and the like may be calculated based on the acquired information, and the necessity of temperature adjustment may be determined based on the calculation result. The resistances of these loads may be read from the storage unit included in the charge / discharge control device 14 or an external device, or may be calculated by the temperature adjustment determination unit 51.

  Or the temperature adjustment determination part 51 may estimate the emitted-heat amount and temperature during charging / discharging using charging / discharging information, and may judge the necessity of temperature adjustment based on a prediction result.

  Note that the temperature adjustment determination unit 51 may determine whether or not temperature adjustment is necessary for a portion that operates by charging and discharging. For example, when charging / discharging information indicating a charging / discharging instruction for a specific battery module 10 is acquired, a location related to charging / discharging (for example, the battery module 10 to be charged / discharged, the charge / discharge control device 14, the module selection unit 20 and adjacent to them) The necessity of temperature adjustment may be determined according to the output power and the amount of heat generated for each battery module 10). In this case, the adjustment reference may be set according to the battery state (SOC, voltage, deterioration state, etc.) of the battery module 10.

The method by which the temperature adjustment determination unit 51 predicts the heat generation amount and temperature is not limited. For example, heat generation information indicating the heat generation amount and temperature for each charge / discharge condition may be stored in advance in a storage unit (not shown) included in the temperature control device 15 or an external device. The temperature adjustment determination unit 51 may calculate the heat generation amount with reference to the discharge information and the heat generation information. The amount of heat generated by the battery module 10 can be expressed as equation (1) using a current amount Io flowing at that time and the number N of storage batteries constituting the battery module with respect to a general DC internal resistance value Ro.

The amount of heat generated in the charge / discharge control device 14 can be expressed by Equation (2) where α _C is the heat generation efficiency, I _{O is} the total current of all the battery modules 10, and V _O is the total output.

The heat generated in the charge / discharge control device 14 is transferred to the battery module 10 through the power line. For this reason, when the heat transfer efficiency of the power line is β _C , the heat generation amount shown in the equation (3) is transferred from the charge / discharge control device 14 to the battery module.

  In addition, the calorific values of the temperature control device 15 and the module selection unit 20 can be expressed in the same manner as the equation (2). In addition to the above, the heat generation information may be the detection result of the temperature detected by the temperature sensor 12, or the temperature indicated in the catalog of the battery module 10 or the safety standard.

The temperature adjustment determination unit 51 can determine an adjustment condition indicating the inflow condition of the temperature adjustment liquid using at least one of the acquired temperature information and charge / discharge information. For example, the inflow amount may be set according to the output and output time indicated by the charge / discharge conditions included in the charge / discharge information. Or you may determine the temperature adjustment conditions which show the inflow conditions of the temperature adjustment liquid to the piping 13 using the emitted-heat amount at the time of charging / discharging, or a temperature prediction result. For example, the inflow amount of the temperature adjustment liquid necessary for cooling the predicted heat generation amount may be calculated, and the calculated inflow amount may be used as the temperature adjustment condition. For example, the inflow amount of the temperature adjusting liquid necessary for adjusting the temperature by 1 ° C. can be calculated using the equation (4). here,

  Similarly, the inflow amount of the temperature adjusting liquid necessary for heating to the target temperature can be determined.

  Alternatively, the timing (time, time difference from the output start time, etc.) when the temperature adjustment liquid flows in may be determined as the adjustment condition. The adjustment condition may be determined for each before the output of the storage battery, during the output, and after the output, or may be determined uniformly from the start of the output of the storage battery until the lapse of a certain time after the output. For example, the temperature adjustment determination unit 51 may determine the time for starting the temperature adjustment. For example, when the temperature of the battery module 10 tends to rise after a certain time has elapsed since the start of discharge, the inflow of the temperature adjustment liquid may be started after a certain time from the start of discharge. In this case, the inflow amount of the temperature adjustment liquid can be suppressed while maintaining the temperature adjustment effect.

  When the power storage device 1 discharges a large amount of power, the temperature adjustment determination unit 51 may determine the battery module 10 that performs temperature adjustment and the order in which the battery module 10 executes. For example, it is assumed that the selection order of the battery modules 10 and the discharge time of each battery module 10 are acquired as the discharge information. In this case, the on / off order and the on / off switching timing for each temperature adjustment switch 16 corresponding to each battery module 10 may be determined. Alternatively, when the discharge is performed a plurality of times in the acquired selection order, the temperature may be adjusted only for the battery module 10 that is discharged a predetermined number of times, or the temperature adjustment may be started after the predetermined number of times of discharge is performed. .

  The temperature adjustment determination unit 51 generates an adjustment signal including the necessity of temperature adjustment and transmits the adjustment signal to the notification unit 52. The adjustment signal may further include information indicating the inflow amount of the temperature adjustment liquid and the temperature adjustment location. The notification unit 52 transmits an adjustment signal to the temperature adjustment switch 16. Further, the notification unit 52 may transmit an adjustment signal to an external device (server or user computer) or the charge / discharge control device 14.

  The temperature adjustment switch 16 starts temperature adjustment according to the acquired adjustment signal.

  According to the present embodiment, the same operational effects as those of the first to fourth embodiments can be obtained.

  Further, according to the present embodiment, when the output and output time indicated by the charge / discharge information, the battery capacity, and the load resistance exceed a certain value, it is determined that temperature adjustment is necessary. According to this embodiment as described above, it is possible to reduce the temperature adjustment delay until the temperature adjustment starts. That is, compared with the case where it is determined whether temperature adjustment is possible based on the temperature information, the maximum temperature in the power storage device 1 can be lowered and deterioration of the power storage device 1 can be reduced.

  Moreover, according to this embodiment, the calorific value and temperature at the time of charging / discharging are estimated based on charging / discharging information, and the necessity of temperature adjustment is judged based on a prediction result. According to the present embodiment as described above, the temperature adjustment liquid necessary for temperature adjustment can be secured in advance. For this reason, even when the calorific value is large, the temperature in the power storage device 1 can be quickly kept within an appropriate temperature range. Further, it is possible to prevent excessive cooling or heating when the calorific value is small.

  Further, according to the present embodiment, it is possible to determine whether or not temperature adjustment is necessary for a portion that operates by charging and discharging, and perform temperature adjustment. According to this embodiment, heat generation due to charging and discharging can be suppressed, and operation in a low temperature environment can be prevented. In addition, it is possible to prevent overcooling and overheating of portions that do not operate during charging and discharging.

[Sixth Embodiment]
There may be a case where temperature adjustment is necessary depending on the situation outside the power storage device 1. Moreover, since only the temperature information in the power storage device 1 cannot determine whether the temperature change of the battery module 10 or the charge / discharge control device 14 is a result due to an abnormality such as a failure or an overload, or a result proportional to the outside air temperature. Adjustment may not be possible. Therefore, in the present embodiment, the necessity of temperature adjustment is determined by further using the external environment temperature as the temperature information.

  An example of a functional block diagram of the temperature control device 15 in the present embodiment is shown in FIG. 3 as in the first embodiment. The temperature control device 15 in the present embodiment is different from the first to fourth embodiments in that the temperature information acquisition unit 50a of the acquisition unit 50 acquires external environment information indicating environmental information outside the power storage device 1. Hereinafter, functions different from those of the first to fifth embodiments will be described, and descriptions of common points will be omitted as appropriate.

  The temperature information acquisition unit 50 a acquires external environment information indicating environmental information outside the power storage device 1. The external environment information is temperature information outside the power storage device 1, for example. Further, it may be weather information such as humidity, wind power, precipitation, and sunshine hours. In addition to the outside air temperature, the temperature of the load connected to the power storage device 1 may be used.

  The method by which the temperature information acquisition unit 50a acquires external environment information is not particularly limited. For example, the environmental temperature sensor 17 may be provided outside the power storage device 1. The environmental temperature sensor 17 detects the temperature outside the case 11. The temperature information acquisition unit 50a may acquire the temperature detected by the environmental temperature sensor 17 as external environment information.

  Alternatively, the temperature information acquisition unit 50a may access an external server or the like via a network and acquire weather information at the location of the power storage device 1 from the server as external environment information. Alternatively, the user of the power storage device 1 may input external environment information using a terminal.

  The temperature adjustment determination unit 51 further determines whether or not temperature adjustment is necessary using the external environment information. The temperature adjustment determination unit 51 compares the temperature indicated by the temperature information with the temperature indicated by the external environment information, and determines whether or not temperature adjustment is necessary.

  For example, the temperature adjustment determination unit 51 may determine that the temperature adjustment is necessary when the temperature inside the power storage device 1 indicated by the temperature information is higher than the outside temperature indicated by the external input information by a certain value or more. Alternatively, it may be determined that temperature adjustment is necessary when the outside air temperature reaches the dew point temperature of the temperature acquired by the temperature sensor 12.

  As another example, the temperature adjustment determination unit 51 may compare the temperature indicated by the temperature information with the temperature indicated by the external environment information to determine the state of the battery module 10, the charge / discharge control device 14, the module selection unit 20, and the like. . For example, when the temperature indicated by the temperature information is higher than the external environment temperature by a certain level or more, it may be determined that there is an abnormality or failure. In this case, the temperature adjustment determination unit 51 may determine that temperature adjustment is necessary, and cause the temperature adjustment switch 16 to start temperature adjustment via the notification unit 52.

  Alternatively, it may be determined that the temperature adjustment is unnecessary, and an abnormality signal may be transmitted to the charge / discharge control device 14 or an external device via the notification unit 52. The charge / discharge control device 14 that has received the abnormal signal may stop charging / discharging until the abnormal signal is canceled.

  According to this embodiment, the same effect as the first to sixth embodiments can be obtained.

  Further, according to the present embodiment, it is possible to determine whether or not temperature adjustment is necessary by further using external environment information. According to this embodiment as described above, it is possible to prevent the occurrence of condensation by reducing the temperature difference from the external environment. Furthermore, the use of tap water facilitates temperature adjustment relatively linked to the external environment.

Further, according to the present embodiment, the temperature indicated by the temperature information is compared with the temperature indicated by the external environment information, for example, when the temperature in the power storage device 1 is increased due to the influence of the outside air temperature and when the battery module 10 or It can be distinguished from the case where the temperature of the power storage device 1 is rising due to the abnormality of the discharge control device 14.

[Seventh Embodiment]
In the present embodiment, the time when the temperature adjustment is necessary is predicted using the external input information indicating the usage status of the power storage device 1.

  An example of a functional block diagram of the temperature control device 14 in the present embodiment is shown in FIG. The temperature control device 14 according to this embodiment is different from the first to fifth embodiments in that the acquisition unit 50 includes an external input information acquisition unit 50c. Hereinafter, functions different from those in the first to fifth embodiments will be described, and descriptions of functions common to the first to fifth embodiments will be omitted as appropriate.

  The external input information acquisition unit 50 c acquires external input information indicating the usage status of the power storage device 1. The external input information is, for example, a power usage pattern of a load to which the power storage device 1 supplies electricity, a past charge / discharge history, and the like. Alternatively, it may be information indicating a tendency of time for housework (cleaning, washing, cooking, etc.) in a general household, working hours in a factory or office, and the like. As another example, information indicating a tendency of time for requesting the power storage device 1 for high power may be used.

  The method for acquiring the external input information is not particularly limited. For example, the usage pattern of the load of the power supply destination may be acquired using a power meter of a facility provided with the load of the power supply destination, a HEMS (Home Energy Management System), or the like. Or you may acquire the log | history of the charge instruction | indication and discharge instruction | indication which the memory | storage part of the charging / discharging control apparatus 14 and the server on a network hold | maintain.

  The temperature adjustment determination unit 51 determines the time when the temperature adjustment is necessary based on the external input information. The temperature adjustment determination unit 51 predicts the trend of the time zone and time when charging and discharging are started and the charge and discharge time using external input information. Based on the predicted result, the time when the temperature adjustment is necessary is determined. For example, it may be determined that the temperature adjustment is performed before the predicted charging or discharging time period. Alternatively, it may be determined that a time zone in which the power storage device 1 is used for a certain time or longer is predicted and temperature adjustment is performed during charging and discharging in the predicted time zone. Alternatively, it may be determined that a time zone in which there is a tendency to discharge at a certain output or more is predicted and temperature adjustment is performed in the predicted time zone.

  For example, if there is a tendency to start discharging at 8 AM every day, the temperature adjustment may be executed at 7:50 AM every day. When there is a tendency to use continuously in a specific time zone, temperature adjustment may be started in the time zone.

  Alternatively, it is assumed that the use frequency of the storage battery tends to be high on the day when the outside air temperature is within a predetermined range. In this case, the temperature adjustment may be performed during a period in which the forecast and detection result of the outside air temperature acquired as the external input information coincide with the range.

  Based on the acquired external input information, the temperature adjustment condition may be determined. For example, it is assumed that there is a tendency to discharge at a high discharge output in a specific time zone. In this case, it is assumed that the temperature adjustment determination unit 51 performs temperature adjustment in the time zone and before and after (for example, before and after 30 minutes). Furthermore, the average discharge output of the time zone may be calculated, and the inflow amount and the inflow time of the temperature adjustment liquid may be calculated based on the calculated average discharge output.

  The temperature adjustment determination unit 51 generates an adjustment signal including a prediction result. The adjustment signal may indicate a time when temperature adjustment is necessary in a predetermined period (1 day, 1 week, 1 month, etc.). Alternatively, it may indicate a time at which temperature adjustment is necessary. Alternatively, it may indicate a temperature adjustment schedule that is time-series data of times that require temperature adjustment.

  The temperature adjustment determination unit 51 transmits an adjustment signal to the notification unit 52. Furthermore, it transmits to the memory | storage part 53 not shown, and the memory | storage part 53 may hold | maintain an adjustment signal. The notification unit 52 that has acquired the adjustment signal transmits the adjustment signal to the temperature adjustment switch 18. The notification unit 52 may appropriately acquire an adjustment signal from the storage unit 53 and transmit it to the temperature adjustment switch 18.

  According to this embodiment, the same effect as the first to sixth embodiments can be obtained.

Moreover, in this embodiment, since the use condition of the electrical storage apparatus 1 is considered and the time and temperature adjustment conditions which require temperature adjustment are estimated, the temperature rise by long-time use of the electrical storage apparatus 1 can be prevented in advance, for example.
[Example]
FIG. 13 shows an example of a functional block diagram of the charge / discharge control device 14. The charge / discharge control device 14 includes a BMU (Battery Management Unit) 31, a power conditioner (PCS) 32, and a system controller 33.

  The BMU 31 protects the battery module 10 from overcharge, overdischarge, overcurrent, and the like. The PCS 32 converts an alternating current supplied from the power distribution system into a direct current that can be stored in the battery module 10, and also converts a direct current power discharged by the battery module into an alternating current power that can be supplied to a load or the distribution system. While controlling the operation of the PCS including the DC / AC bidirectional inverter 34 according to the instructions from the bidirectional inverter 34 and the system controller 33. And a control unit 35 for monitoring the operation of the BMU. The power distribution system is a system that is managed by a power supplier (eg, a power company) and supplies power to power consumers and loads.

  The system controller 33 can be realized by an information processing apparatus including a CPU, a storage device, various theoretical circuits, and a communication unit for transmitting / receiving information to / from the control unit 35, the BMU 32, and the DC / AC bidirectional inverter 34.

  In FIG. 13, the BMU 31, the PCS 32, and the system controller 33 are described separately, which indicates that the three modules are logically separated. These modules may be physically separated from each other, or at least a part thereof may be integrally formed in any combination.

  Although the present invention has been described with reference to the embodiments and examples, the present invention is not limited to the above embodiments and examples. The above embodiments may be combined, and the configuration and details can be modified in various ways that can be understood by those skilled in the art within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Battery module 11 Case 12 Temperature sensor 13 Piping 14 Charge / discharge control device 15 Temperature control device 16 Temperature adjustment switch 17 Communication line 18 Flow rate sensor 19 Input / output terminal 20 Module selection part 31 BUM
32 PCS
33 System Controller 50 Acquisition Unit 51 Temperature Adjustment Determination Unit 52 Notification Unit

Claims (17)

A power storage device having a chargeable / dischargeable storage battery,
A battery module comprising the storage battery;
A case for housing the battery module;
A pipe provided in the case and in which a temperature adjusting liquid for adjusting the temperature of the power storage device flows in a non-circulating manner;
A power storage device. A plurality of battery modules connected in parallel;
A module selection unit for selecting at least one of the plurality of battery modules;
An input / output terminal;
The module selection unit connects the selected battery module and the input / output terminal.
The power storage device according to claim 1. Having a plurality of battery modules,
The pipe passes between the battery module and another battery module;
The power storage device according to claim 1 or 2. A plurality of shunt pipes branched from the pipes and provided at positions corresponding to the plurality of battery modules;
A temperature adjustment switch for controlling the flow of the temperature adjustment liquid for each of the plurality of branch pipes,
The power storage device according to claim 1. A temperature control device in a power storage device having a non-circulating pipe through which a temperature adjusting liquid flows,
Obtaining means for obtaining information used for temperature adjustment determination;
Temperature adjustment determining means for determining whether or not temperature adjustment is necessary based on the acquired information and instructing circulation of the temperature adjustment liquid to the pipe;
Temperature control device. The acquisition unit includes a temperature information acquisition unit that acquires temperature information indicating the temperature of the power storage device. The temperature adjustment determination unit determines whether temperature adjustment is necessary based on the temperature information, and the temperature to the pipe is determined. The temperature control device according to claim 5, wherein the temperature control device instructs distribution of the adjustment liquid. The acquisition means includes charge / discharge information acquisition means for acquiring charge / discharge information including a charge / discharge instruction to the power storage device,
The temperature adjustment determination means determines whether or not temperature adjustment is necessary based on the charge / discharge information, and instructs the temperature adjustment means to start circulation of the temperature adjustment liquid.
The temperature control device according to claim 5. The temperature adjustment determination means instructs the temperature adjustment means to start circulation of the temperature adjustment liquid before starting charge / discharge.
The temperature control device according to claim 7. The temperature adjustment determination means determines whether or not temperature adjustment is necessary by comparing an adjustment reference that defines a reference for determining whether or not temperature adjustment is necessary and information acquired by the acquisition means;
The temperature control apparatus of any one of Claim 5 to 8. The temperature adjustment determining means is
Judging a location where temperature adjustment is required in the power storage device, and instructing the temperature adjustment means to distribute the temperature adjustment liquid to the pipe corresponding to the required location,
The temperature control apparatus of any one of Claim 5 to 9. The temperature adjustment determination means determines an adjustment condition indicating an inflow condition of the temperature adjustment liquid based on the charge / discharge information including the charge / discharge condition indicating the output of the power storage device.
The temperature control apparatus of any one of Claim 7 to 10. The temperature information acquisition unit further acquires external environment information indicating environmental information outside the power storage device,
The temperature adjustment determining means determines that temperature adjustment is necessary when the temperature indicated by the temperature information is higher than a temperature indicated by the external environment information by a certain value or more.
The temperature control device according to claim 6. The acquisition means comprises external information acquisition means for acquiring external input information indicating the usage status of the power storage device,
The temperature adjustment determination unit predicts a time zone and time when charging / discharging starts using external input information, a tendency of charging / discharging time, and determines a time when temperature adjustment is necessary based on the predicted result.
The temperature control device according to claim 5. The temperature adjustment determining means determines whether or not temperature adjustment after the temperature adjustment under the adjustment condition is completed;
The temperature control apparatus according to any one of claims 5 to 13. The temperature adjustment determination means transmits a signal indicating that the power storage device is abnormal to a charge / discharge control means for controlling charge / discharge of the battery module when the addition of the temperature adjustment is repeated a predetermined number of times. ,
The temperature control device according to claim 15. A temperature control system for a power storage device including a storage battery,
A battery module having a storage battery;
A non-circulating pipe that circulates the temperature control liquid;
A case for housing the battery module and the pipe;
A temperature control device for controlling the flow of the temperature adjusting liquid;
A temperature sensor for detecting a temperature of the power storage device;
A temperature adjustment switch for controlling the flow of the temperature adjustment liquid based on an instruction of the temperature control device,
The temperature control device compares the temperature information detected by the temperature sensor with an adjustment standard that defines a reference that requires temperature adjustment, determines whether or not temperature adjustment is necessary, and sets the temperature adjustment switch to supply the temperature adjustment liquid to the pipe. Temperature control system that starts distribution. Using charge / discharge information including charge / discharge instructions to the power storage device,
Determining the flow of the temperature adjusting liquid to the non-circulating pipe through which the temperature adjusting liquid for adjusting the temperature of the power storage device flows;
Power storage device temperature adjustment determination method.

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