CN110422078B - Electric box and electric quantity acquisition method thereof - Google Patents
Electric box and electric quantity acquisition method thereof Download PDFInfo
- Publication number
- CN110422078B CN110422078B CN201810387202.4A CN201810387202A CN110422078B CN 110422078 B CN110422078 B CN 110422078B CN 201810387202 A CN201810387202 A CN 201810387202A CN 110422078 B CN110422078 B CN 110422078B
- Authority
- CN
- China
- Prior art keywords
- box
- current
- electric
- electric box
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000007599 discharging Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000013500 data storage Methods 0.000 claims description 8
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 18
- 238000004891 communication Methods 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 238000007726 management method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000012512 characterization method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention relates to the technical field of battery management and discloses an electric box and an electric quantity obtaining method of the electric box. The method for acquiring the electric quantity of the electric box comprises the following steps: judging whether the electric box works in a single-box mode or not; if the electric box works in a single-box mode, starting a current acquisition module in the electric box, and acquiring the working current of the electric box through the current acquisition module; and calculating the battery electric quantity value of the electric box according to the working current. The invention also provides an electric box. According to the embodiment of the invention, the accurate estimation of the battery electric quantity value in the single-box mode can be realized, and the current acquisition module in the electric box is started only in the single-box mode, so that the additional energy consumption in the whole vehicle mode is not increased.
Description
Technical Field
The embodiment of the invention relates to the technical field of battery management, in particular to an electric box and an electric quantity obtaining method of the electric box.
Background
Along with the gradual development of electric automobiles, the importance of the electric box is higher and higher, and the requirements of users on the electric box are also higher and higher; not only is the power supply time of the electrical box required to last longer, but also the charging time of the electrical box is required to be shorter and shorter.
Generally, the electronic box can be charged in a finished automobile mode, but the charging speed in the finished automobile mode cannot meet the user requirements at present. The quick change technology of the electric automobile is realized currently, the quick change technology refers to that the electric automobile is directly changed into an electric box with electricity, and the electric box with low electric quantity is placed in a power change station for charging. The quick change technology is one of effective methods for solving the problem of slow charging of the electric automobile.
The inventor finds that at least the following problems exist in the prior art: in the process of supplying power to the electric automobile by the electric box, the control unit of the electric automobile needs to know the electric quantity of the electric box in time, and particularly when the electric box is just filled with electric power to enter the electric automobile, the control unit of the electric automobile needs to know the electric quantity of each electric box which is filled in, and all the electric boxes in the whole automobile mode are subjected to unified electric quantity calibration according to the electric quantity data of each electric box. If the electric box is charged in a finished automobile mode, the current sensor is arranged in the finished automobile high-voltage box, so that accurate current data can be provided for calculating the electric quantity of the electric box; however, if the electrical box is charged in the single-box mode by using the quick-change technology, the working current in the single-box mode cannot be accurately obtained due to the lack of a necessary current sampling unit in the electrical box, so that the electric quantity of the single box cannot be accurately estimated.
Disclosure of Invention
The invention aims to provide an electric box and an electric box electric quantity acquisition method, which can realize accurate estimation of a battery electric quantity value in a single-box mode, and can not increase extra energy consumption in a whole vehicle mode because a current acquisition module in the electric box is started only in the single-box mode.
In order to solve the above technical problem, an embodiment of the present invention provides a method for acquiring an electric quantity of an electrical box, including: judging whether the electric box works in a single-box mode or not; if the electric box works in a single-box mode, starting a current acquisition module in the electric box; collecting the working current of the electric box through the current collecting module; and calculating the battery electric quantity value of the electric box according to the working current.
An embodiment of the present invention also provides an electrical box, including: the device comprises a battery pack, a current acquisition module, a microprocessor and a memory; the current acquisition module is connected to a charging and discharging path of the battery pack; the microprocessor is connected with the current acquisition module and the memory; the storage stores instructions which can be executed by the microprocessor, and the instructions are executed by the microprocessor so that the microprocessor can execute the method for acquiring the electric box electric quantity.
Compared with the prior art, if the electric box works in a single-box mode, the current acquisition module in the electric box is started, and the working current of the electric box is acquired through the current acquisition module; then calculating the battery electric quantity value of the electric box according to the working current; the working current of the single box is collected in real time, and accurate data can be provided for the working state and the electric quantity estimation of the electric box in the single box mode. Therefore, the accurate estimation of the battery electric quantity value in the single box mode is realized, the electric quantity state of the electric box can be conveniently obtained by a vehicle when the electric box is installed in the vehicle for use, and the commercial realization of the quick-change electric box becomes possible; and, because the current acquisition module in the electronic box is started only when the single-box mode is used, namely the current acquisition module can not be started in the whole vehicle mode, extra energy consumption in the whole vehicle mode can not be increased.
In addition, before the calculating the battery electric quantity value of the electric box according to the working current, the method further comprises the following steps: judging whether the working current meets a preset condition or not; and if the working current meets a preset condition, the step of calculating the battery electric quantity value of the electric box according to the working current is carried out. In this embodiment, the preset condition may be set according to a requirement, and whether to calculate the battery power value according to the operating current may be determined according to the preset condition, so that calculation of the battery power value without reference value may be avoided, and processing load may be reduced as much as possible.
In addition, after the calculating the battery electric quantity value of the electric box according to the working current, the method further comprises the following steps: identifying the current value of the current required current of the electric box according to the battery electric quantity value; judging whether the current value of the working current is matched with the current value of the current required current or not; and if not, sending the current value of the current required current to a charger so that the charger charges the electric box according to the current value of the current required current. Because the corresponding relation between the battery electric quantity value and the current value is pre-stored in each electric box, the current values of the current required during charging are different when the battery electric quantities of the electric boxes are different. In this embodiment, the situation that the current value of the working current is not matched with the current value of the current required can be determined, and the charger is timely notified to adjust the magnitude of the charging current to the electrical box, so that the electrical box is prevented from being damaged when the actual charging current is too large, or the charging time is prevented from being too long when the charging current is too small, and the electrical box is charged more safely and quickly.
In addition, whether judge the electronic box and work in single case mode specifically includes: judging whether a connection signal is received from the vehicle; the vehicle sends the connection signal when the electric box supplies power. And if the connection signal is not received, judging that the electric box works in the single-box mode. In this embodiment, a method for determining that the mobile terminal operates in the single-box mode is provided.
In addition, if the connection signal is not received and before the electrical box is determined to work in the single-box mode, the method further comprises the following steps: judging whether the connection signal is received after a preset time delay; and if the connection signal is not received, judging that the electric box works in the single-box mode. In this embodiment, whether the connection signal is received is determined again after the preset delay, so that the determination result is more reliable.
In addition, the method is applied to a microprocessor in an electronic box. In this embodiment, the microprocessor of the electronic box executes the method without increasing the burden and cost of the battery management system of the vehicle to which the electronic box is applied.
In addition, after calculating the battery electric quantity value of the electric box according to the working current, the method further comprises the following steps: sending the battery electric quantity value to an external prompting device so as to prompt the battery electric quantity value on the external prompting device; and/or prompting the battery electric quantity value through a prompting device arranged on the electric box. In this embodiment, can in time indicate the battery electric quantity value of electronic box.
In addition, after calculating the battery electric quantity value of the electric box according to the working current, the method further comprises the following steps: and storing the battery electric quantity value into a data storage module in the electric box so that a vehicle connected with the electric box can acquire the battery electric quantity value. In this embodiment, after the electronic box was put into the vehicle, the vehicle main part can in time learn the battery electric quantity value of electronic box.
In addition, the current acquisition module is a current sensor. In the embodiment, current detection can be realized only by one current sensor, and the realization is simple and convenient.
In addition, the current acquisition module comprises a divider resistor, a differential acquisition circuit and an analog-to-digital conversion circuit; the voltage division resistor is connected to a charging and discharging path of the battery pack; the differential acquisition circuit is connected between the divider resistor and the analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is connected with the microprocessor. In this embodiment, the current collection module is realized in a circuit mode, and the circuit can be integrated on a circuit board in the electronic box, so that the space can be saved, and the cost can be saved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flowchart of a method of acquiring an electric box capacity according to a first embodiment of the present invention;
fig. 2 is a flowchart of a method of acquiring an electric box capacity according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method of acquiring an electric box capacity according to a third embodiment of the present invention;
fig. 4 is a flowchart of a method of acquiring an electric box capacity according to a fourth embodiment of the present invention;
FIG. 5 is a schematic view of an electrical box according to a fifth embodiment of the present invention;
FIG. 6 is another schematic view of an electrical box according to a fifth embodiment of the present invention;
fig. 7 is a schematic view of an electrical box according to a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The first embodiment of the invention relates to a method for acquiring the electric quantity of an electric box. The specific process is shown in fig. 1, and comprises the following steps:
and step 101, judging whether the electric box works in a single-box mode. If yes, the process proceeds to step 102, otherwise, the process is ended.
103, collecting the working current of the electric box through a current collecting module;
and 104, calculating the battery electric quantity value of the electric box according to the working current.
Compared with the prior art, the method and the device have the advantages that if the electric box works in the single-box mode, the current collection module in the electric box is started, and the working current of the electric box is collected through the current collection module; then calculating the battery electric quantity value of the electric box according to the working current; the working current of the single box is collected in real time, and accurate data can be provided for the working state and the electric quantity estimation of the electric box in the single box mode. Therefore, the accurate estimation of the battery electric quantity value in the single box mode is realized, the electric quantity state of the electric box can be conveniently obtained by a vehicle when the electric box is installed in the vehicle for use, and the commercial realization of the quick-change electric box becomes possible; and, because the current acquisition module in the electronic box is started only when the single-box mode is adopted, the extra energy consumption in the whole vehicle mode can not be increased.
The following describes implementation details of the method for acquiring the electric box power amount of the present embodiment in detail, and the following description is only provided for facilitating understanding and is not necessary for implementing the present embodiment.
In this embodiment, when the electrical box is installed in and supplies power to the vehicle, the electrical box operates in a full vehicle mode; when the electric box is taken out of the vehicle and is connected to a charger for charging or single-box discharging, the electric box works in a single-box mode. The electronic box of the embodiment is applied to the electric vehicle, however, the embodiment does not limit the application, and any equipment needing to be powered by the electronic box belongs to the application range of the electronic box.
In this embodiment, the method for acquiring the electric quantity of the electric box is applied to a microprocessor in the electric box, that is, the microprocessor executes the method. The microprocessor of the electronic box executes the method, and the burden and the cost of the vehicle main body in the whole vehicle mode can not be increased. When the electronic box is applied to the electric automobile, the battery management system of the electric automobile only needs to be in charge of detecting the battery pack of the electronic box in the whole automobile mode, and does not need to be in charge of detecting the battery pack of the electronic box in the single box mode. However, the execution object to which the method is applied is not limited in this embodiment, and in other examples, the method may be executed by a vehicle (for example, a battery management system of an electric vehicle) to which the electronic box is applied, or executed by another main control device.
In step 101, specifically, it is determined whether a link signal is received from a vehicle; if not, the electric box is judged to work in the single-box mode, the step 102 is entered, and if yes, the process is ended.
Specifically, when the vehicle is connected with the electrical box, the electrical box is awakened and supplies power to the vehicle; at the moment, the vehicle can send out a connection signal as a mark signal of the electric box and the vehicle in a normal communication state; the wiring signal may be periodically sent to the electrical box during normal communication of the electrical box with the vehicle. When the electronic box is awakened, the microprocessor enters a system initialization process; and in the initialization process, judging whether the electric box works in a single-box mode or not.
Taking an electric automobile as an example, an electric box is in communication connection with the electric automobile through a Controller Area Network (CAN), when the electric box is installed in the electric automobile and supplies power to the electric automobile, the electric automobile CAN periodically send CAN network messages to the electric box so as to indicate that the electric automobile is supplied with power by the electric box and is in a normal connection state with the electric box; wherein, the CAN network message is used as the connection signal. Therefore, when the electric box works in a whole vehicle mode, the CAN network messages sent by the electric vehicle CAN be periodically received; on the contrary, if the electric box does not receive the CAN network message, the electric box works in the single-box mode. However, the embodiment does not limit the present invention, and the vehicle may also send the characteristic information (for example, the identification mark) of the vehicle to the electronic box, and if the electronic box receives the characteristic information, it indicates that the electronic box is connected to the vehicle; if not, indicating that the vehicle is in single-box mode; wherein, the electronic box can also be applied to other equipment besides the vehicle. In addition, the microprocessor of the electronic box can also actively acquire the connection signal or the characteristic information of the vehicle from the vehicle to judge.
In this embodiment, the microprocessor performs the determination during the initialization process, but is not limited thereto, and the determination may be performed at regular time after the initialization is completed.
It is emphasized that the default state of the current collection module is the off state; only when the electric box is detected to work in the single-box mode, the current acquisition module can be started; when the electric box is detected to be switched from the single-box mode to another mode (for example, a whole vehicle mode or a sleep mode) or a shutdown signal is detected (for example, after the single-box mode is fully charged, the charging machine stops continuing charging, and the electric box detects the shutdown signal at this time), the current collection module is restored to a default shutdown state.
In step 102, the current collection module has an enable terminal, and the microprocessor sends an enable signal to the enable terminal to start the current collection module.
In step 103, the current collection module is activated to collect the working current from the battery pack, and the microprocessor receives the working current from the current collection module.
In step 104, the SOC algorithm may be used to calculate the battery electric quantity value, where the SOC algorithm includes a terminal voltage method, an ampere-hour integration algorithm, and a closed-loop correction algorithm, and the calculation factors of these algorithms include battery static data and current dynamic data, where the current dynamic data is the working current collected by the current sampling module, the battery static data is the static battery voltage, and the static battery voltage is collected by a voltage collection module preset in the electronic box. However, the present embodiment does not limit the specific calculation method of the battery electric quantity value.
When the electric box is in the single-box mode, the current acquisition module acquires the working current in real time, and the microprocessor calculates the battery electric quantity value in real time according to the working current, namely, the steps 103 and 104 are executed periodically; thus, the electric quantity change of the electric box in the single-box mode can be obtained in real time.
In a preferred example, after the battery power value is calculated (i.e. after step 104), the method further includes sending the battery power value to an external prompting device to prompt the external prompting device for the battery power value; and/or prompting the battery electric quantity value through a prompting device arranged on the electric box. The external prompting device can be a display screen and/or a voice broadcast device, and the prompting device arranged on the electronic box can also be a display screen and/or a voice broadcast device; therefore, the battery electric quantity value of the user electric box can be timely reminded.
In a preferred example, after calculating the battery electric quantity value (i.e. after step 104), the method further includes: the battery electric quantity value is stored in a data storage module in the electric box so as to be acquired by a vehicle connected with the electric box; therefore, after the electric boxes are installed in the vehicle, the battery management system of the vehicle can timely acquire the battery electric quantity values of the electric boxes, so that all the electric boxes in the entire vehicle mode can be uniformly calibrated according to the battery electric quantity values of all the electric boxes; the electric quantity calibration is also called SOC (state of charge, SOC for short) calibration.
It should be noted that, the external prompt device and/or the prompt device installed on the electronic box is used to prompt the battery electric quantity value, and the battery electric quantity value is stored in the data storage module in the electronic box, and these two schemes can be implemented in the same example.
The second embodiment of the invention relates to a method for acquiring the electric quantity of an electric box. The second embodiment is substantially the same as the first embodiment, and the main improvements are: in the second embodiment of the present invention, a preset condition may be set according to a requirement, and it is determined whether to calculate the battery capacity value according to the operating current according to the preset condition.
Fig. 2 is a flowchart illustrating a method for acquiring an electric box power amount according to a second embodiment of the present invention. Steps 201 to 203, and step 205 are substantially the same as steps 101 to 104 in the first embodiment, and are not described herein again; the difference is that the method also comprises the following steps,
and 204, judging whether the working current meets a preset condition. If yes, go to step 205, otherwise, go back to step 203.
In this embodiment, the preset conditions include: the current polarity of the operating current indicates that the electrical box is in a charging state. That is, in the present embodiment, it is preset to calculate the battery electric quantity value of the electric box during the charging process, and therefore, the battery electric quantity value is calculated when it is determined that the electric box is in the charging state. The current polarity refers to the current direction, and the current direction is opposite due to the charging process and the discharging process, that is, the current polarity is opposite, so that the charging or discharging can be determined according to the current polarity.
The current collection module 2 is connected to the charge-discharge path of the battery pack 1, the charge-discharge path of the battery pack includes a positive electrode path and a negative electrode path of the battery pack, and the current collection module 2 may be connected to the positive electrode path or the negative electrode path. Taking the example that the current collection module 2 is connected to the positive path of the battery pack, the current polarity is negative during charging and positive during discharging; that is, when the current polarity of the operating current is determined to be negative, the characterization electric box is in a charging state, and when the current polarity of the operating current is determined to be positive, the characterization electric box is in a discharging state.
In this embodiment, the preset condition is set according to the requirement, and whether the battery electric quantity value is to be calculated according to the working current is determined according to the preset condition, so that the calculation of the battery electric quantity value without reference value can be avoided, and the processing load can be reduced as much as possible. For example, the user only needs to obtain the battery electric quantity value during the single-box charging, and then for the user, the battery electric quantity value during the single-box discharging is of no reference value, and the microprocessor can calculate the battery electric quantity value only during the single-box charging by setting a preset condition.
In an example, it may be set that, after the number of times that the preset condition is not satisfied exceeds the preset number of times in step 204, the process may be ended directly, that is, the process does not need to calculate the electric quantity currently. For example, when it is determined in step 204 that the current polarity does not indicate the charging state, it is likely that the electric box is currently in the single-box discharging state, and the process is ended.
Preferably, the preset conditions may further include: the current value of the operating current is non-zero. That is, the calculation is performed only when there is current, because if the current value is zero, the calculated battery charge value must be zero, and the calculation may not be used.
It should be noted that the present embodiment does not set any limitation on the preset conditions, for example, if only the amount of electricity in the discharging process of the battery needs to be calculated, the preset conditions may be set as: the polarity of the current indicates that the electrical box is in a discharge state. Or, in other examples, the preset condition may be set according to the specific requirement of the user.
A third embodiment of the present invention relates to a method for acquiring the electric box power amount. The third embodiment is substantially the same as the second embodiment, and the main improvements are: in the third embodiment of the present invention, the electric box determines whether the current value of the operating current meets the requirement.
Fig. 3 is a flowchart illustrating a method for acquiring an electric box power amount according to a third embodiment of the present invention. Step 301 to step 305 are substantially the same as step 201 to step 205 in the first embodiment, and are not described herein again; the difference lies in that the method further comprises the following steps:
step 306, identifying the current value of the current required by the electric box according to the electric quantity value of the battery;
And 308, sending the current value of the current required current to the charger so that the charger charges the electric box according to the current value of the current required current.
Specifically, the corresponding relationship between the battery electric quantity value and the current value is prestored in each electric box. If the battery electric quantity of the electric box is different, the current value of the current required during charging is also different, so that the current value of the current required current can also be changed along with the change of the battery electric quantity of the electric box; if the actual charging current is too large, the electric box is easily damaged; if the actual charging current is too small, this can result in an excessively long charging time.
After the microprocessor calculates the battery electric quantity value of the electric box, the current value corresponding to the battery electric quantity value is obtained as the current value of the current required current according to the corresponding relation between the battery electric quantity value and the current value. The microprocessor judges whether the current value of the working current is matched with the current value of the current required current, if not, the current charging current of the charger to the electric box is considered to be not in accordance with the requirement, wherein the detected working current can be understood as the current charging current of the charger to the electric box; at this time, the microprocessor sends the current value of the current required to the charger, so that the charger charges the electric box according to the current value of the current required. It should be noted that the matching in step 307 means that the difference between the current value of the operating current and the current value of the currently required current is within a preset error range.
In this embodiment, the condition that the current value of the working current is not matched with the current value of the current required can be determined, and the charger can be timely notified to adjust the magnitude of the charging current to the electric box, so that the electric box is prevented from being damaged when the current is too large, or the charging time is prevented from being too long when the current is too small, and the charging is safer and faster.
A fourth embodiment of the present invention relates to a method for acquiring the electric box power amount. The fourth embodiment is substantially the same as the first embodiment, and mainly modified in that: in the fourth embodiment of the present invention, whether a connection signal is received is determined a plurality of times to confirm whether to operate in the single box mode.
Fig. 4 is a flowchart illustrating a method for acquiring an electric box power amount according to a fourth embodiment of the present invention. Step 401, step 403 to step 405 are substantially the same as step 101 to step 104 in the first embodiment, and are not described herein again; the difference is that when the determination result of step 401 is no, step 402 is entered.
That is, a preset time delay is set in the system, and after the connection signal is judged not to be received in step 401, if the connection signal is not received, the electric box is confirmed to work in the single-box mode through the preset time delay; according to the scheme of the embodiment, when the misjudgment occurs in the step 401 (for example, when the electronic box is just started, the misjudgment may occur in the step 401 due to the existence of some interference factors), the misjudgment can be found in time, so that the judgment result is more reliable. The specific value of the preset time delay can be set according to the actual situation.
It should be noted that, in this embodiment, only one judgment of the preset delay back connection signal is made, but not limited to this, multiple judgments of the preset delay back connection signal may also be made according to actual needs, and it is finally determined whether the electronic box operates in the single-box mode.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A fifth embodiment of the present invention relates to an electric box, as shown in fig. 5, including: the device comprises a battery pack 1, a current acquisition module 2, a microprocessor 3 and a memory 4.
The current collection module 2 is connected to the charge and discharge path of the battery pack 1. Specifically, the charge and discharge path of the battery pack includes a positive electrode path 11 and a negative electrode path 12 of the battery pack, and the current collection module 2 may be connected to the positive electrode path 11 or the negative electrode path 12. In the single-box mode, the positive electrode path 11 is a path between the positive electrode of the battery pack and the positive electrode output of the charger, and the negative electrode path 12 is a path between the negative electrode of the battery pack and the negative electrode output of the charger; in the full vehicle mode, the positive electrode path 11 is a path between a positive electrode of the battery pack and a negative electrode or a load of the battery pack of the previous electrical box, and the negative electrode path 12 is a path between a negative electrode of the battery pack and a positive electrode or a load of the battery pack of the next electrical box. As shown in fig. 5, the current collection module 2 is connected to the positive path 11 of the battery pack. Preferably, the positive electrode of the battery pack 1 is further connected with a first connection interface 13, and the first connection interface 13 is used for being connected to the positive electrode output of the charger in a single-box mode, or is used for being connected to the negative electrode or the load of the battery pack of the previous electric box in a whole-vehicle mode; the negative electrode of the battery pack 1 is further connected with a second connection interface 14, and the second connection interface 14 is used for being connected to the negative electrode output of the charger in a single-box mode, or is used for being connected to the positive electrode or the load of the battery pack of the next electric box in a whole vehicle mode.
The microprocessor 3 is connected with the current acquisition module 2 and the memory 4; the memory 4 stores instructions executable by the microprocessor 3, and the instructions are executed by the microprocessor 3 so that the microprocessor can execute the method for acquiring the electric box electric quantity. Preferably, the electric box further comprises a circuit board, and the current collection module 2, the microprocessor 3 and the memory 4 are integrated on the circuit board to form a circuit board assembly; the battery pack and the circuit board assembly are fixed in the box body of the electric box.
Preferably, the electrical box further comprises a communication module 5; the microprocessor 3 is connected to the communication module 5, and in the single-box mode, the microprocessor 3 communicates with the charger through the communication module 5 or transmits data in the memory to the charger, and in the vehicle-finishing mode, the microprocessor 3 communicates with the vehicle through the communication module 5 or transmits data in the memory to the vehicle. The communication module 5 can also be connected to the memory 4 at the same time, and the microprocessor 3 can access the memory and control the data in the memory to be directly transmitted to the charger or the vehicle through the communication module 5.
In this embodiment, the current collecting module 2 is a current sensor; for example, the current sensor is a hall current sensor, and the hall current sensor surrounds the charge and discharge path, so that the hall current sensor can detect the working current on the charge and discharge path of the battery pack. The current sensor and the microprocessor 3 CAN be connected through a CAN. In the embodiment, current detection can be realized only by one current sensor, and the realization is simple and convenient.
In a preferred example, as shown in fig. 6, the electric box further comprises a prompting device 6, and the prompting device 6 is connected with the microprocessor 3 and can be installed on the box body of the electric box for prompting the battery electric quantity value. The prompting device 6 may be a display screen and/or a voice announcer.
In a preferred example, the electronic box further comprises a data storage module, which is connected to the microprocessor 3 and is used for storing the battery charge value. The data storage module may be integrated in the memory 4, or may be a separate memory and mounted on the circuit board.
It should be noted that the electronic box may include both the prompting device and the data storage module.
In addition, the electric box also comprises a voltage acquisition module, a temperature acquisition module and an equalization circuit module; the voltage acquisition module is used for acquiring the battery voltage of the battery pack, the temperature acquisition module is used for acquiring the temperature in the electric boxes, and the equalization circuit module is used for equalizing the battery voltage of each electric box installed in the same vehicle.
It should be noted that this embodiment is a system example corresponding to any one of the first to fourth embodiments, and may be implemented in cooperation with any one of the first to fourth embodiments. The related technical details mentioned in any of the first to fourth embodiments are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to any of the first to fourth embodiments.
A sixth embodiment of the present invention relates to an electric box, and is substantially the same as the fifth embodiment, and mainly differs therefrom in that: in the fifth embodiment of the present invention, the current collection module 2 is a current sensor; in the sixth embodiment of the present invention, the current collection module 2 is implemented in a circuit form.
As shown in fig. 7, the current collection module 2 includes a voltage dividing resistor 21, a differential collection circuit 22, and an analog-to-digital conversion circuit 23. The voltage dividing resistor 21 is connected in series in the charge and discharge path of the battery pack, and as shown in fig. 7, the voltage dividing resistor 21 is connected in series on the positive electrode path 11 of the battery pack; the divider resistor 21 may be a resistor having characteristics of high accuracy, low resistance, low heat generation, and the like; the selection can be made according to actual conditions.
A positive phase input end and a negative phase input end of the differential acquisition circuit 22 are respectively connected to two ends of the divider resistor 21 to acquire voltages at two ends of the divider resistor 21 and amplify the acquired voltages; the input end of the analog-to-digital conversion circuit 23 is connected to the output end circuit of the differential acquisition circuit 22 to perform analog-to-digital conversion on the voltage output by the differential acquisition circuit 22; the output of the analog-to-digital conversion circuit 23 is connected to the microprocessor 3. The microprocessor 3 calculates the working current according to the voltage at the two ends of the voltage-dividing resistor 21 and the known resistance value of the voltage-dividing resistor 21 by using ohm's law.
In this embodiment, the current collection module 2 may be integrated on a circuit board in the electrical box. The current collection module 2 in the embodiment is realized in a circuit mode, can be integrated on a circuit board in an electrical box, occupies a small space compared with a current sensor, and can be connected with a microprocessor through wiring on the circuit board without additional transmission line connection, so that the space can be further saved; therefore, the current acquisition module realized in a circuit form occupies a smaller space and saves cost.
It should be noted that fig. 7 in the present embodiment is an improvement on fig. 5, but is not limited thereto, and may be an improvement on fig. 6.
It should be noted that this embodiment is a system example corresponding to any one of the first to fourth embodiments, and may be implemented in cooperation with any one of the first to fourth embodiments. The related technical details mentioned in any of the first to fourth embodiments are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to any of the first to fourth embodiments.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (12)
1. A method for acquiring electric quantity of an electric box is characterized by comprising the following steps:
judging whether the electric box works in a single-box mode or not;
if the electric box works in a single-box mode, starting a current acquisition module in the electric box;
collecting the working current of the electric box through the current collecting module;
calculating the battery electric quantity value of the electric box according to the working current;
wherein before the calculating the battery electric quantity value of the electric box according to the working current, the method further comprises the following steps:
judging whether the working current meets a preset condition or not; wherein the preset conditions include: the current polarity of the working current represents that the electric box is in a charging state;
and if the working current meets the preset requirement, the step of calculating the battery electric quantity value of the electric box according to the working current is carried out.
2. The method for acquiring the electric box electric quantity according to claim 1, characterized in that after the calculating the battery electric quantity value of the electric box according to the working current, the method further comprises:
identifying the current value of the current required current of the electric box according to the battery electric quantity value;
judging whether the current value of the working current is matched with the current value of the current required current or not;
and if not, sending the current value of the current required current to a charger so that the charger charges the electric box according to the current value of the current required current.
3. The method for acquiring the electric quantity of the electric box according to claim 1, wherein the judging whether the electric box works in a single-box mode specifically comprises:
judging whether a connection signal is received from the vehicle; the vehicle sends the connection signal when the electric box supplies power;
and if the connection signal is not received, judging that the electric box works in the single-box mode.
4. The method for acquiring the electric box quantity according to claim 3, wherein if the connection signal is not received and before the determination that the electric box is in the single-box mode, the method further comprises:
judging whether the connection signal is received after a preset time delay; and if the connection signal is not received, judging that the electric box works in the single-box mode.
5. The method for acquiring the electric box power according to claim 1, wherein the method is applied to a microprocessor in the electric box.
6. The method for acquiring the electric box electric quantity according to claim 1, after calculating the battery electric quantity value of the electric box according to the working current, further comprising:
sending the battery electric quantity value to an external prompting device so as to prompt the battery electric quantity value on the external prompting device; and/or the presence of a gas in the gas,
and prompting the battery electric quantity value through a prompting device arranged on the electric box.
7. The method for acquiring the electric box electric quantity according to claim 1, after calculating the battery electric quantity value of the electric box according to the working current, further comprising:
and storing the battery electric quantity value into a data storage module in the electric box so that a vehicle connected with the electric box can acquire the battery electric quantity value.
8. An electrical box, comprising: the device comprises a battery pack, a current acquisition module, a microprocessor and a memory;
the current acquisition module is connected to a charging and discharging path of the battery pack;
the microprocessor is connected with the current acquisition module and the memory; wherein,
the memory stores instructions executable by the microprocessor to enable the microprocessor to perform the method of acquiring electrical box charge amount of any one of claims 1 to 7.
9. The electrical box of claim 8, wherein the current collection module is a current sensor.
10. The electrical box of claim 8, wherein the current collection module comprises a voltage divider resistor, a differential collection circuit, and an analog-to-digital conversion circuit;
the voltage division resistor is connected to a charging and discharging path of the battery pack;
the differential acquisition circuit is connected between the divider resistor and the analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is connected with the microprocessor.
11. The electrical box of claim 8, further comprising a prompting device connected to the microprocessor and configured to prompt the battery charge value.
12. The electrical box of claim 8, further comprising a data storage module coupled to the microprocessor and configured to store the battery charge value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387202.4A CN110422078B (en) | 2018-04-26 | 2018-04-26 | Electric box and electric quantity acquisition method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387202.4A CN110422078B (en) | 2018-04-26 | 2018-04-26 | Electric box and electric quantity acquisition method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110422078A CN110422078A (en) | 2019-11-08 |
| CN110422078B true CN110422078B (en) | 2022-04-08 |
Family
ID=68408251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810387202.4A Active CN110422078B (en) | 2018-04-26 | 2018-04-26 | Electric box and electric quantity acquisition method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110422078B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734827A (en) * | 2005-07-18 | 2006-02-15 | 刘浏沐 | Network type replacing method for battery of electric vehicle and apparatus therefor |
| CN101667665A (en) * | 2009-09-22 | 2010-03-10 | 惠州市亿能电子有限公司 | Battery management system capable of meeting fast switching sub-box charging mode |
| CN102064578A (en) * | 2010-12-20 | 2011-05-18 | 中国电力科学研究院 | Battery charging and replacing station for electric vehicles |
| CN102707236A (en) * | 2012-05-10 | 2012-10-03 | 许继集团有限公司 | Power battery SOC (State of Charge) estimation method for charging station monitoring system |
| CN106602638A (en) * | 2016-11-28 | 2017-04-26 | 德阳九鼎智远知识产权运营有限公司 | Intelligent management system and method for lithium battery pack |
| CN107623384A (en) * | 2017-09-08 | 2018-01-23 | 北京北交新能科技有限公司 | A kind of rail traffic vehicles energy-storage box of fast changeable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9315113B2 (en) * | 2012-12-21 | 2016-04-19 | Ample Inc. | Electric vehicle battery systems with exchangeable parallel electric vehicle battery modules |
-
2018
- 2018-04-26 CN CN201810387202.4A patent/CN110422078B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734827A (en) * | 2005-07-18 | 2006-02-15 | 刘浏沐 | Network type replacing method for battery of electric vehicle and apparatus therefor |
| CN101667665A (en) * | 2009-09-22 | 2010-03-10 | 惠州市亿能电子有限公司 | Battery management system capable of meeting fast switching sub-box charging mode |
| CN102064578A (en) * | 2010-12-20 | 2011-05-18 | 中国电力科学研究院 | Battery charging and replacing station for electric vehicles |
| CN102707236A (en) * | 2012-05-10 | 2012-10-03 | 许继集团有限公司 | Power battery SOC (State of Charge) estimation method for charging station monitoring system |
| CN106602638A (en) * | 2016-11-28 | 2017-04-26 | 德阳九鼎智远知识产权运营有限公司 | Intelligent management system and method for lithium battery pack |
| CN107623384A (en) * | 2017-09-08 | 2018-01-23 | 北京北交新能科技有限公司 | A kind of rail traffic vehicles energy-storage box of fast changeable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110422078A (en) | 2019-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2574948B1 (en) | Electric storage device monitor | |
| US10209317B2 (en) | Battery control device for calculating battery deterioration based on internal resistance increase rate | |
| JP5812032B2 (en) | Power storage system and method for estimating full charge capacity of power storage device | |
| US8493031B2 (en) | Equalization device, battery system and electric vehicle including the same, equalization processing program, and equalization processing method | |
| US9438059B2 (en) | Battery control apparatus and battery control method | |
| US5703469A (en) | System for determining battery conditions | |
| JP5621818B2 (en) | Power storage system and equalization method | |
| JP5868499B2 (en) | Battery control device | |
| EP3565731B1 (en) | A method and arrangement for determining the state of charge of a battery pack | |
| US20120161709A1 (en) | Secondary-battery control apparatus | |
| CN109904535B (en) | Power management device, power management system, and battery pack information acquisition method | |
| JP7199021B2 (en) | Management device, power storage system | |
| CN104483628A (en) | Electric vehicle battery pack state-of-health detection device and method | |
| CN110058177B (en) | Power battery electric quantity SOC correction method | |
| JP2011069782A (en) | Voltage monitoring circuit, and battery power supply device | |
| CN111532177A (en) | Charging heating control method and device, automobile and storage medium | |
| CN103003092A (en) | Electricity charging system | |
| CN112557926A (en) | Method and device for calculating residual charging time | |
| JP5862478B2 (en) | Power storage system and control method | |
| CN211018294U (en) | Charge control device, battery management system, and battery pack | |
| CN110422078B (en) | Electric box and electric quantity acquisition method thereof | |
| CN107340480B (en) | Intelligent automobile storage battery sensor | |
| JP3744833B2 (en) | Method for determining the life of secondary batteries for electric vehicles | |
| CN113934970A (en) | Method and device for processing charging remaining time | |
| JP6434245B2 (en) | Charging rate estimation device and power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |