WO2022130924A1 - 電源制御装置 - Google Patents
電源制御装置 Download PDFInfo
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- WO2022130924A1 WO2022130924A1 PCT/JP2021/043152 JP2021043152W WO2022130924A1 WO 2022130924 A1 WO2022130924 A1 WO 2022130924A1 JP 2021043152 W JP2021043152 W JP 2021043152W WO 2022130924 A1 WO2022130924 A1 WO 2022130924A1
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- unit
- power supply
- state
- switch
- power
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- 238000006243 chemical reaction Methods 0.000 claims description 83
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 20
- 230000002457 bidirectional effect Effects 0.000 description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Definitions
- This disclosure relates to a power supply control device.
- a plurality of battery units can be charged by a charger, or some battery units can be used as a backup from other battery units. It can supply power to the motor.
- the multiple electric loads include an electric load whose power consumption is not fixed
- the power of the electric load whose power consumption is not fixed is determined.
- the electric load other than this electric load may consume the required electric power.
- the present disclosure has been made based on the above-mentioned circumstances, and an object of the present disclosure is to provide a power supply control device capable of satisfactorily supplying electric power to a plurality of electric loads.
- the power supply control device of the present disclosure is It is a power supply control device that controls discharge from a power supply unit equipped with a plurality of storage units.
- a switching unit that switches the connection status of the plurality of power storage units, and A control unit that controls the switching unit and Have, The switching unit switches between a first connection state in which the charging current can be supplied to the entire storage unit and a second connection state in which the plurality of storage units are divided into a plurality of storage unit regions. When the switching unit is in the second connection state, electric power is supplied from each storage unit region to each target load.
- the power supply control device of the present disclosure can satisfactorily supply electric power to a plurality of electric loads.
- FIG. 1 is a block diagram schematically illustrating an in-vehicle power supply system including the power supply control device of the first embodiment, showing a state in which the switching unit is switched to the first connection state.
- FIG. 2 is a block diagram schematically illustrating an in-vehicle power supply system including the power supply control device of the first embodiment, showing a state in which the switching unit is switched to the second connection state.
- FIG. 3 is a flowchart illustrating the flow of switching control executed by the control unit of the first embodiment.
- FIG. 4 is a block diagram schematically illustrating an in-vehicle power supply system including the power supply control device of the second embodiment, and shows a state in which the switching unit is switched to the first connection state.
- FIG. 5 is a block diagram schematically illustrating an in-vehicle power supply system including the power supply control device of the second embodiment, and shows a state in which the switching unit is switched to the second connection state.
- the power supply control device is a power supply control device that controls discharge from a power supply unit provided with a plurality of power storage units, and controls a switching unit for switching the connection state of the plurality of power storage units and a control unit for controlling the switching unit. It has a part and.
- the switching unit switches between a first connection state in which the charging current can be supplied to the entire storage unit and a second connection state in which the plurality of storage units are divided into a plurality of storage unit regions. When the switching unit is in the second connection state, electric power is supplied to each target load from each of the plurality of storage unit regions.
- the power supply control device of the above [1] separates a part of the target load and a part of the target load.
- the electric power from the power storage unit can be individually supplied to each of the target loads excluding the target load of.
- the power supply control device of the above [1] includes a charging circuit, and the control unit switches the switching unit to the first connection state when the charging current is supplied from the charging circuit to the power supply unit, and discharges from the power supply unit. If this is the case, the switching unit may be switched to the second connection state.
- the power supply control device of the above [2] is a power storage unit area that individually supplies power to each of a part of the target load and the target load excluding the part of the target load by setting the switching unit to the first connection state. Can be charged all at once.
- the power supply control device is provided with a voltage conversion unit.
- the control unit operates the voltage conversion unit with the switching unit switched to the second connection state.
- the voltage conversion unit operates in the second connection state according to the satisfaction of the discharge condition, the voltage is converted by the voltage conversion unit based on the power from one of the plurality of storage unit regions divided. Power is supplied to one target load. Further, the electric power may be supplied to the other target load by conducting conduction between any other storage unit region and the other target load without passing through the voltage conversion unit.
- the power supply control device of the above [3] can supply the voltage-converted power by the voltage conversion unit to the target load to which the voltage-converted power is preferably supplied by the voltage conversion unit. Then, the electric power can be supplied to the target load, which is preferably supplied without the voltage conversion unit, without the voltage conversion unit.
- the switching unit of the power supply control device of the above [3] has a first switch, a second switch, a third switch, and a fourth switch.
- the first switch switches the main power supply unit, the power supply unit, and a plurality of target loads between a connected state and a non-connected state.
- the second switch switches each storage unit region between a connected state and a non-connected state.
- the third switch switches between the connected state and the non-connected state of any other storage unit region and the other target load.
- the fourth switch switches the other target load and the main power supply unit between the connected state and the disconnected state.
- the main power supply unit, the power supply unit, and a plurality of target loads are switched from the connected state to the non-connected state by the first switch.
- the storage unit regions are switched from the connected state to the non-connected state by the second switch.
- the other target load and the main power supply unit are switched from the connected state to the non-connected state by the fourth switch.
- the fourth control for switching between the non-connected state and the connected state of any other storage unit region and the other target load by the third switch, or the discharge control for discharging the voltage conversion unit is executed. You may.
- the power supply control device of the above [4] executes the first control, the second control, and the third control in this order. Then, by executing either the fourth control or the discharge control after that, it is possible to smoothly switch from the first connection state to the second connection state while suppressing the burden on each component.
- the switching unit in the first connection state, maintains a state in which a plurality of power storage units are connected in series. In the second connection state, the switching unit may divide a plurality of storage units connected in series into a plurality of storage unit regions.
- the output voltage can be easily changed to a desired magnitude by increasing or decreasing the number of storage units.
- the switching unit in any one of the above [1] to [4], in the first connection state, the switching unit maintains a state in which a plurality of power storage units are connected in parallel. In the second connection state, the switching unit may divide a plurality of storage units connected in parallel into a plurality of storage unit regions.
- the in-vehicle power supply system 100 (hereinafter, also referred to as a power supply system 100) shown in FIGS. 1 and 2 supplies electric power from the main power supply unit 94 to the voltage conversion unit 10 via the first conductive path 81 to supply the power supply unit 91.
- the voltage from the main power supply unit 94 is supplied to a plurality of target loads 98A, 98B, 98C via the first conductive path 81, and the voltage applied from the power supply unit 91 is converted by the voltage conversion unit 10.
- it is configured as a system capable of supplying the voltage converted via the first conductive path 81 to a plurality of target loads 98A, 98B, 98C.
- the plurality of target loads 98A, 98B, 98C are in-vehicle electric devices mounted on a vehicle, are electrically connected to the first conductive path 81, and operate by electric power supplied through the first conductive path 81. obtain.
- the type and number of multiple target loads 98A, 98B, 98C are not limited.
- the target loads 98A and 98B are examples of one target load.
- the power consumption of the target loads 98A and 98B does not change significantly depending on the usage conditions, and maintains a generally stable size.
- the target load 98C is an example of another target load.
- the power consumption of the target load 98C has a characteristic that the size changes according to the usage situation, and is not determined.
- electrically connected is preferably a configuration in which they are connected in a state of being electrically connected to each other (a state in which a current can flow) so that both potentials of the connection target are equal.
- the configuration is not limited to this.
- electrically connected may be a configuration in which both connection targets are connected in a state where both connection targets can be electrically connected while an electric component is interposed between the two connection targets.
- the power supply system 100 mainly includes a main power supply unit 94, a first conductive path 81, a power supply unit 91, a bypass conductive path 72, a power supply control device 1, and the like.
- the main power supply unit 94 is a portion that serves as a main power source for supplying electric power to a plurality of target loads 98A, 98B, 98C and the power supply unit 91, and is configured as an in-vehicle battery such as a lead battery, for example.
- the terminal on the high potential side is electrically connected to the first conductive path 81
- the terminal on the low potential side is electrically connected to the reference conductive path G in which the ground potential (0 V) is maintained.
- a predetermined output voltage is applied to the first conductive path 81.
- the main power supply unit 94, the voltage conversion unit 10 of the power supply control device 1, a plurality of target loads 98A, 98B, 98C and the like are electrically connected to the first conductive path 81.
- the power supply unit 91 has a configuration in which a plurality of power storage units 92A, 92B, 92C, and 92D are connected in series.
- Each of the power storage units 92A, 92B, 92C, and 92D is composed of an in-vehicle power storage means such as a lead battery, an electric double layer capacitor, and a lithium ion battery, and is electrically connected to the voltage conversion unit 10.
- the terminal 91A on the highest potential side of the power supply unit 91 is electrically connected to the voltage conversion unit 10.
- the terminal 91B on the lowest potential side of the power supply unit 91 is electrically connected to, for example, a reference conductive path G maintained at the ground potential (0V).
- the power supply unit 91 is configured by connecting four power storage units 92A, 92B, 92C, and 92D in series.
- a voltage conversion unit 10 is interposed between the power supply unit 91 and the first conductive path 81.
- the bypass conductive path 72 is a path for supplying electric power from the first position P1 between the power storage units in the power supply unit 91 to the first conductive path 81 electrically connected to the target load 98C in the first conductive path 81. Specifically, one end of the bypass conductive path 72 is electrically connected to the first position P1. The other end of the bypass conductive path 72 is electrically connected to the first conductive path 81 that is electrically connected to the target load 98C.
- the first position P1 has a low potential side terminal of the power storage unit 92B located on the high potential side of the first position P1 and a high potential side terminal of the power storage unit 92C located on the low potential side of the first position P1. This is the position to connect electrically.
- the power supply control device 1 mainly includes a switching unit 30, a control unit 20, a voltage conversion unit 10, and the like.
- the switching unit 30 has a first switch 31, a second switch 32, a third switch 33, and a fourth switch 34.
- the first switch 31, the second switch 32, the third switch 33, and the fourth switch 34 are switches configured by using one or a plurality of semiconductor switches such as MOSFETs and bipolar transistors and mechanical relays, for example.
- the first switch 31 is provided between the main power supply unit 94 in the first conductive path 81, the voltage conversion unit 10, and the plurality of target loads 98A, 98B, 98C.
- the first switch 31 is interposed in the first conductive path 81.
- the first switch 31 When the first switch 31 is on, it is between the main power supply unit 94, the voltage conversion unit 10, the power supply unit 91 electrically connected to the voltage conversion unit 10, and a plurality of target loads 98A, 98B, 98C. Allows continuity.
- the first switch 31 When the first switch 31 is in the off state, it is between the main power supply unit 94, the voltage conversion unit 10, the power supply unit 91 electrically connected to the voltage conversion unit 10, and a plurality of target loads 98A, 98B, 98C.
- the first switch 31 allows conduction between the main power supply unit 94, the voltage conversion unit 10, the power supply unit 91 electrically connected to the voltage conversion unit 10, and the plurality of target loads 98A, 98B, 98C. Switch between the connected state and the non-connected state that cuts off the continuity.
- the second switch 32 is provided between the power storage units 92A, 92B, which is the power storage unit region R1, and the power storage units 92C, 92D, which is the power storage unit region R2, among the plurality of power storage units 92A, 92B, 92C, 92D. ing.
- the power storage unit region R1 is an example of any one of the power storage unit regions.
- the power storage unit region R2 is an example of any other power storage unit region.
- the second switch 32 is interposed between the terminal on the low potential side of the power storage unit 92B and the terminal on the high potential side of the power storage unit 92C.
- the second switch 32 is in a conductive state when it is on and allows bidirectional energization, and when it is off, it is in a non-conducting state and prohibits bidirectional energization. That is, the second switch 32 of the switching unit 30 switches the connection state of the plurality of storage units 92A, 92B, 92C, 92D.
- the second switch 32 is connected in series with a plurality of power storage units 92A, 92B, 92C, 92D in the power supply unit 91 and is arranged between the power storage units.
- the second switch 32 has a storage unit 92C, 92D (storage unit region R2) arranged on the lower potential side than itself when it is on, and a storage unit 92A, 92B (storage unit 92A, 92B) arranged on the higher potential side than itself.
- the path between the storage units with the unit region R1) is switched to the conduction state.
- the second switch 32 is in the off state, the path between the storage units is switched to the non-conducting state, and the terminal on the low potential side of the storage unit 92B is electrically connected to the reference conductive path G in which the terminal on the low potential side is maintained at the ground potential (0V). (See Fig. 2).
- the power storage unit 92C arranged on the high potential side of the power storage units 92C and 92D located on the low potential side of the power supply unit 91 and the power storage unit 92C and 92B arranged on the low potential side of the power storage units 92A and 92B.
- a second switch 32 is provided between the storage unit 92B and the storage unit 92B. When the second switch 32 is in the ON state, conduction between the power storage unit 92C and the power storage unit 92B is allowed, and a current can flow between them. When the second switch 32 is in the off state, the continuity between the power storage unit 92C and the power storage unit 92B is cut off, and no current flows between them. That is, the second switch 32 switches between a connected state that allows continuity between the storage unit regions R1 and R2 and a non-connected state that cuts off the continuity.
- the third switch 33 is provided on the bypass conductive path 72.
- the third switch 33 is interposed in the bypass conductive path 72.
- the third switch 33 When the third switch 33 is in the ON state, the first position P1 and the target load 98C are electrically connected, and power is supplied from the first position P1 side to the first conductive path 81 side electrically connected to the target load 98C. Tolerate.
- the third switch 33 When the third switch 33 is in the off state, the conduction between the first position P1 and the target load 98C is cut off, and the electric power from the first position P1 side to the first conductive path 81 side electrically connected to the target load 98C. Cut off the supply. That is, the third switch 33 switches between a connected state that allows conduction between the power storage unit region R2 and the target load 98C and a non-connected state that cuts off the conduction.
- the fourth switch 34 is provided between the target load 98C and the main power supply unit 94, which is a part of the plurality of target loads 98A, 98B, 98C in the first conductive path 81.
- the fourth switch 34 is interposed in the first conductive path 81.
- the fourth switch 34 When the fourth switch 34 is in the ON state, conduction between the target load 98C and the main power supply unit 94 is allowed together with the plurality of target loads 98A and 98B.
- the fourth switch 34 is in the off state, the continuity between the target load 98C and the main power supply unit 94 is cut off. That is, the fourth switch 34 switches between a connected state that allows conduction between the target load 98C and the main power supply unit 94 and a non-connected state that cuts off the conduction.
- the control unit 20 is an in-vehicle electronic control device capable of controlling each switch (first switch 31, second switch 32, third switch 33, fourth switch 34) in the switching unit 30, and is information such as a CPU. It is equipped with various devices such as a processing device, a storage device, and an AD converter.
- the control unit 20 for example, the voltage value of the first conductive path 81 is input by the voltage detection unit 85. As a result, the control unit 20 is configured to be able to grasp the voltage value of the first conductive path 81.
- the control unit 20 may be configured by a single electronic control device or may be configured by a plurality of electronic control devices. The control in the control unit 20 will be described later.
- the voltage conversion unit 10 is provided between the first conductive path 81 and the power supply unit 91.
- the voltage conversion unit 10 boosts the voltage applied to the first conductive path 81 and applies it to the power supply unit 91, and lowers the voltage applied from the power supply unit 91 and applies it to the first conductive path 81. It is a circuit to get.
- the voltage conversion unit 10 can be configured as a bidirectional DCDC converter including, for example, a semiconductor switching element and an inductor. Specifically, the voltage conversion unit 10 can preferably use a synchronous rectification type non-isolated DCDC converter, a diode type non-isolated DCDC converter, or the like.
- the voltage conversion unit 10 can be controlled by the control unit 20.
- the control unit 20 gives a control signal (PWM signal) for boosting operation to the voltage conversion unit 10, boosts the voltage applied to the first conductive path 81, and applies a desired target voltage to the power supply unit 91.
- the feedback control of the control signal (PWM signal) is performed as described above.
- the duty of the control signal (PWM signal) is adjusted by the feedback calculation. In this way, the power supply unit 91 is charged. That is, the voltage conversion unit 10 functions as a charging circuit 12 for charging the power supply unit 91.
- control unit 20 gives a control signal (PWM signal) for step-down operation to the voltage conversion unit 10, steps down the voltage applied from the power supply unit 91, and sets a desired target voltage to the first conductive path 81.
- the feedback control of the control signal (PWM signal) is performed so as to apply.
- the control unit 20 executes the control shown in FIG. 3 according to the satisfaction of a predetermined start condition. Specifically, for example, when the vehicle equipped with the power supply control device 1 is in the starting state (for example, when the starting switch such as the ignition switch is switched from the off state to the on state), the control shown in FIG. 3 is performed. Run.
- step S1 When the control unit 20 starts the control of FIG. 3, first, the process of step S1 is performed, the third switch 33 is switched to the off state, and the second switch 32 is switched to the on state.
- the third switch 33 When the third switch 33 is switched to the off state, the power supply from the first position P1 side to the first conductive path 81 side electrically connected to the target load 98C is cut off.
- the second switch 32 when the second switch 32 is switched to the ON state, the low-potential side storage units 92C and 92D arranged on the low-potential side of the self and the high-potential side storage units arranged on the high-potential side of the self.
- the path between the storage units between the 92A and 92B is switched to the conduction state.
- step S2 the control unit 20 switches the first switch 31 and the fourth switch 34 to the on state.
- the control unit 20 gives a control signal (PWM signal) for boosting operation to the voltage conversion unit 10, boosts the voltage applied to the first conductive path 81, and sets a desired target voltage to the power supply unit 91.
- a control signal is output to the voltage conversion unit 10 so as to be applied, and the voltage conversion unit 10 is operated as the charging circuit 12.
- the switching unit 30 switches to the first connection state in which the charging current from the main power supply unit 94 supplied via the voltage conversion unit 10 can be supplied to the entire storage units 92A, 92B, 92C, 92D. See FIG. 1).
- the fact that the charging current can be supplied to the entire storage unit 92A, 92B, 92C, 92D means that the charging current flows from the terminal 91A located at the highest potential into the storage unit 92A and is located at the lowest potential. It means a state in which a current can flow from the terminal 91B to the reference conductive path G.
- the voltage conversion unit 10 operates as the charging circuit 12. That is, the control unit 20 switches the switching unit 30 to the first connection state when the charging current is supplied from the charging circuit 12 to the power supply unit 91. In the first connection state, the switching unit 30 maintains a state in which a plurality of storage units 92A, 92B, 92C, 92D are connected in series.
- step S3 the control unit 20 determines whether or not the main power supply unit 94 has failed. For example, the control unit 20 determines whether or not the main power supply unit 94 has failed based on the voltage value of the first conductive path 81 detected by the voltage detection unit 85. If it is determined in step S3 that the main power supply unit 94 has not failed (No in step S3), the process in FIG. 3 ends.
- step S3 when the control unit 20 determines that the main power supply unit 94 has failed (Yes in step S3), the control unit 20 shifts to step S4 in order to switch the switching unit 30 from the first connection state to the second connection state. do.
- step S4 the control unit 20 executes the first control. Specifically, the control unit 20 switches the first switch 31 from the on state to the off state. When the first switch 31 is switched to the off state, the main power supply unit 94, the voltage conversion unit 10, the power supply unit 91 electrically connected to the voltage conversion unit 10, and a plurality of target loads 98A, 98B, 98C. The continuity between them is cut off.
- the main power supply unit 94, the voltage conversion unit 10, the power supply unit 91 electrically connected to the voltage conversion unit 10, and the plurality of target loads 98A, 98B, 98C are separated from each other.
- the control unit 20 executes the second control. Specifically, the control unit 20 switches the second switch 32 from the on state to the off state.
- the power storage units 92A and 92B connected in series and the power storage units 92C and 92D are divided into two power storage unit regions R1 and R2.
- the terminal on the low potential side of the power storage unit 92B is electrically connected to the reference conductive path G maintained at the ground potential (0V). That is, in the second control, the storage unit regions R1 and R2 are switched from the connected state to the non-connected state by switching the second switch 32 to the off state.
- the control unit 20 executes the third control. Specifically, the control unit 20 switches the fourth switch 34 from the on state to the off state. When the fourth switch 34 is switched to the off state, the continuity between the target load 98C and the main power supply unit 94 is cut off. That is, the third control switches the target load 98C and the main power supply unit 94 from the connected state to the non-connected state by switching the fourth switch 34 to the off state. In this way, the target load 98C and the main power supply unit 94 are separated.
- the control unit 20 executes the fourth control. Specifically, the control unit 20 switches the third switch 33 to the on state.
- the third switch 33 is switched to the ON state, power supply from the first position P1 side to the first conductive path 81 side electrically connected to the target load 98C in the first conductive path 81 is allowed. That is, in the fourth control, the storage unit region R2 and the target load 98C are switched from the non-connected state to the connected state by switching the third switch 33 to the on state.
- the switching unit 30 switches to the second connection state in which the plurality of storage units 92A, 92B, 92C, 92D are divided into the plurality of storage unit regions R1 and R2 (see FIG. 2).
- the switching unit 30 divides the plurality of power storage units 92A, 92B, 92C, 92D connected in series into the plurality of power storage unit regions R1 and R2. At this time, power supply to the target load 98C is started from the power storage unit region R2.
- the control unit 20 executes discharge control. Specifically, the control unit 20 causes the voltage conversion unit 10, which was operating as the charging circuit 12, to perform a discharge operation in which power is supplied from the power storage unit region R1 of the power supply unit 91 to the target loads 98A and 98B. That is, when a predetermined discharge condition (that is, the failure of the main power supply unit 94) is satisfied, the control unit 20 discharges the voltage conversion unit 10 with the switching unit 30 switched to the second connection state.
- a predetermined discharge condition that is, the failure of the main power supply unit 94
- the control unit 20 is used in the voltage conversion unit 10.
- the voltage may be increased to apply a desired target voltage to the first conductive path 81.
- the voltage conversion unit 10 discharges in the second connected state according to the satisfaction of the discharge condition, the voltage is based on the power from the power storage unit region R1 of one of the divided power storage unit regions R1 and R2. After voltage conversion by the conversion unit 10, power is supplied to the target loads 98A and 98B. Then, the power storage unit region R2 and the target load 98C are electrically connected to each other without going through the voltage conversion unit 10, and power is supplied to the target load 98C.
- the power supply control device 1 controls the discharge from the power supply unit 91 including the plurality of power storage units 92A, 92B, 92C, 92D.
- the power supply control device 1 has a switching unit 30 for switching the connection state of the plurality of power storage units 92A, 92B, 92C, and 92D, and a control unit 20 for controlling the switching unit 30.
- the switching unit 30 has a first connection state in which the charging current can be supplied to the entire storage units 92A, 92B, 92C, 92D, and the plurality of storage units 92A, 92B, 92C, 92D in the plurality of storage unit regions R1, It switches to the second connection state divided into R2.
- the switching unit 30 When the switching unit 30 is in the second connection state, electric power is supplied from the storage unit areas R1 and R2 to the target loads 98A, 98B, and 98C, respectively.
- the power supply control device 1 includes a charging circuit 12, and the control unit 20 switches the switching unit 30 to the first connection state when the charging current is supplied from the charging circuit 12 to the power supply unit 91, and discharges from the power supply unit 91. In this case, the switching unit 30 is switched to the second connection state. According to this configuration, the power supply control device 1 separately supplies electric power to each of the target load 98C and the target loads 98A and 98B excluding the target load 98C by setting the switching unit 30 in the first connection state.
- the unit areas R1 and R2 can be charged at once.
- the power supply control device 1 includes a voltage conversion unit 10.
- the control unit 20 operates the voltage conversion unit 10 with the switching unit 30 switched to the second connection state.
- the voltage conversion unit 10 is based on the power from the storage unit region R1 of any one of the divided storage storage unit regions R1 and R2. After being voltage-converted by the above, power is supplied to one target load 98A, 98B. Further, the power storage unit region R2 and the target load 98C are electrically connected to each other without going through the voltage conversion unit 10, and power is supplied to the target load 98C.
- the power supply control device 1 can supply the voltage-converted electric power by the voltage conversion unit 10 to the target loads 98A and 98B to which the voltage-converted electric power is preferably supplied by the voltage conversion unit 10. Then, the power supply control device 1 can supply electric power to the target load 98C, which is preferably supplied without the voltage conversion unit 10, without going through the voltage conversion unit 10.
- the switching unit 30 of the power supply control device 1 has a first switch 31, a second switch 32, a third switch 33, and a fourth switch 34.
- the first switch 31 switches the main power supply unit 94, the power supply unit 91, and the plurality of target loads 98A, 98B, 98C between a connected state and a non-connected state.
- the second switch 32 switches the storage unit regions R1 and R2 between the connected state and the non-connected state.
- the third switch 33 switches the storage unit region R2 and the target load 98C between the connected state and the non-connected state.
- the fourth switch 34 switches the target load 98C and the main power supply unit 94 between a connected state and a non-connected state.
- the control unit 20 executes the first control, the second control, and the third control in this order.
- the first control the main power supply unit 94, the power supply unit 91, and the plurality of target loads 98A, 98B, 98C are switched from the connected state to the non-connected state by the first switch 31.
- the second control the storage unit regions R1 and R2 are switched from the connected state to the non-connected state by the second switch 32.
- the target load 98C and the main power supply unit 94 are switched from the connected state to the non-connected state by the fourth switch 34.
- the third switch 33 executes the fourth control of switching the storage unit region R2 and the target load 98C from the non-connected state to the connected state.
- the power supply control device 1 executes the first control, the second control, and the third control in this order. Then, by executing the fourth control after this, it is possible to smoothly switch from the first connection state to the second connection state while suppressing the burden on each component.
- the switching unit 30 when in the first connection state, the switching unit 30 maintains a state in which a plurality of power storage units 92A, 92B, 92C, 92D are connected in series. In the second connection state, the switching unit 30 divides the plurality of power storage units 92A, 92B, 92C, 92D connected in series into the plurality of power storage unit regions R1 and R2. According to this configuration, in the power supply control device 1, a plurality of power storage units 92A, 92B, 92C, 92D are connected in series. Therefore, the output voltage can be easily changed to a desired magnitude by increasing or decreasing the number of storage units.
- FIGS. 3, 4, and 5 An in-vehicle power supply system 200 including the power supply control device 2 according to the second embodiment of the present disclosure will be described with reference to FIGS. 3, 4, and 5.
- the power supply control device 2 according to the second embodiment is provided with a point having a configuration in which the power supply unit 191 is connected in parallel, a position where one end of the bypass conductive path 172 is electrically connected, and a second switch 132 of the switching unit 130.
- the position and the like are different from those of the first embodiment.
- the same components as those in the first embodiment are designated by the same reference numerals, and the description of the structure, operation and effect will be omitted.
- the power supply unit 191 has a configuration in which the power storage units 92A and 92B connected in series, which is the power storage unit region R11, and the power storage units 92C, 92D connected in series, which are the power storage unit regions R12, are connected in parallel. ..
- the power storage unit region R11 is an example of any one of the power storage unit regions.
- the power storage unit region R12 is an example of any other power storage unit region. That is, the plurality of power storage units 92A, 92B, 92C, 92D are connected in parallel.
- the terminal 191A on the high potential side of the power storage unit 92A and the power storage unit 92C is electrically connected to the voltage conversion unit 10.
- the terminal 191B on the low potential side of the power storage unit 92B and the power storage unit 92D is electrically connected to the reference conductive path G maintained at the ground potential (0V).
- the first position P11 is a position for electrically connecting the terminals on the high potential side of the power storage unit regions R11 and R12 (that is, the terminals on the high potential side of the power storage units 92A and 92C) and the voltage conversion unit 10.
- the second switch 132 of the switching unit 130 is provided between the voltage conversion unit 10 and the power storage unit region R12 (storage unit 92C, 92D). Specifically, the second switch 132 is interposed between the voltage conversion unit 10 and the terminal on the high potential side of the power storage unit 92C. The second switch 132 is not interposed between the voltage conversion unit 10 and the storage unit region R11 (storage unit 92A, 92B). That is, the voltage conversion unit 10 and the power storage unit region R11 are always in a conductive state regardless of the state of the second switch 132.
- the second switch 132 has the same configuration as the second switch 32.
- the second switch 132 is configured to be in a conductive state to allow bidirectional energization when in the on state, and to be in a non-conducting state to prohibit bidirectional energization in the off state.
- the second switch 132 is connected in series to the power storage units 92C and 92D in the power supply unit 191 and is connected in parallel to the power storage units 92A and 92B.
- the second switch 132 When the second switch 132 is on, the path between the voltage conversion unit 10 and the storage units 92C and 92D (storage unit region R12) is switched to the conduction state. The second switch 132 switches this path to the non-conducting state when it is in the off state. When the second switch 132 is in the ON state, the power storage unit 92C and the voltage conversion unit 10 are electrically connected, and a current can flow between them. When the second switch 132 is in the off state, the storage unit 92C and the voltage conversion unit 10 are electrically cut off, and no current flows between them.
- control unit 20 in the second embodiment Similar to the first embodiment, the control unit 20 executes the control of FIG. 3 according to the satisfaction of a predetermined start condition.
- control unit 20 executes the control of FIG. 3 according to the satisfaction of a predetermined start condition.
- the same description as that of the first embodiment will be omitted.
- step S1 When the control unit 20 starts the control of FIG. 3, first, the process of step S1 is performed, the third switch 33 is switched to the off state, and the second switch 132 is switched to the on state. By switching the second switch 132 to the ON state, the path between the voltage conversion unit 10 and the power storage unit 92C is switched to the conduction state. In this way, the power storage units 92A and 92B, which are the power storage unit regions R11, and the power storage units 92C, 92D, which are the power storage unit regions R12, are connected in parallel.
- the control unit 20 switches the first switch 31 and the fourth switch 34 to the on state.
- the switching unit 130 is supplied with the charging current from the main power supply unit 94 supplied via the voltage conversion unit 10 to the entire storage units 92A, 92B, 92C, 92D.
- the fact that the charging current can be supplied to the entire storage units 92A, 92B, 92C, 92D means that the charging current flows from the terminal 191A located at the highest potential into each of the storage units 92A, 92C, and the most. It means a state in which a current can flow from the terminal 191B located at a low potential to the reference conductive path G.
- the switching unit 130 maintains a state in which the plurality of storage units 92A and 92B and the 92C and 92D are connected in parallel.
- step S3 when the process proceeds to step S3, the control unit 20 determines whether or not the main power supply unit 94 has failed. When it is determined that the main power supply unit 94 has not failed (No in step S3), the process in FIG. 3 ends.
- step S3 when the control unit 20 determines that the main power supply unit 94 has failed (Yes in step S3), the control unit 20 proceeds to step S4.
- step S4 the control unit 20 executes the first control.
- step S5 the control unit 20 executes the second control. Specifically, the control unit 20 switches the second switch 132 to the off state. When the second switch 132 is switched to the off state, the power storage units 92A and 92B and the power storage units 92C and 92D connected in parallel are divided into two power storage unit regions R11 and R12.
- step S6 the control unit 20 executes the third control.
- the control unit 20 executes the fourth control.
- the third switch 33 is switched to the ON state, power supply from the first position P11 side to the first conductive path 81 side electrically connected to the target load 98C in the first conductive path 81 is allowed.
- the switching unit 130 switches to the second connection state as shown in FIG. In the second connection state, the switching unit 130 divides the plurality of power storage units 92A and 92B and the 92C and 92D connected in parallel into the plurality of power storage unit regions R11 and R12.
- step S8 the control unit 20 executes discharge control and ends the process shown in FIG.
- the switching unit 130 when in the first connection state, the switching unit 130 maintains a state in which the power storage units 92A and 92B and the power storage units 92C and 92D are connected in parallel. Then, in the second connection state, the switching unit 130 divides the power storage units 92A and 92B and the power storage units 92C and 92D connected in parallel into a plurality of power storage unit regions R11 and R12. According to this configuration, in the power supply control device 2, the power storage units 92A and 92B and the power storage units 92C and 92D are connected in parallel. Therefore, it is easy to maintain the voltage output from the power supply unit 91 at a predetermined magnitude for a longer period of time as compared with the case where the power storage units are connected in series.
- Embodiments 1 and 2 exemplify a mode in which four power storage units 92A, 92B, 92C, and 92D are used.
- the number of power storage units is not limited to this.
- the power supply unit 91 is divided into two power storage unit regions R1 and R2 by the second switch 32, and in the second embodiment, the power supply unit 191 is divided into two power storage unit regions R11 by the second switch 132. , R12 is illustrated.
- the number of second switches may be increased to divide the power supply unit into three or more.
- the number of fourth switches is also increased, the number of target loads isolated from the main power supply is increased, and a bypass conductive path for electrically connecting each target load and each storage unit region is provided for each target load.
- a configuration is conceivable in which each storage unit area is allocated.
- the mode in which the voltage conversion unit 10 also operates as the charging circuit 12 is illustrated.
- the present invention is not limited to this, and a voltage conversion unit and a charging circuit may be provided separately.
- the failure of the main power supply unit 94 is used as a predetermined discharge condition.
- the present invention is not limited to this, and other conditions that define the case where power is not desired to be supplied from the main power supply unit may be used as the predetermined discharge conditions.
- the control unit In a power load where the power consumption is not fixed, when the power consumption is fixed, the on state of the 2nd switch and the 4th switch and the off state of the 3rd switch are maintained, and only the 1st switch is in the off state. You may switch to. As a result, the electric power of the power supply unit via the voltage conversion unit can be supplied to all the target loads. In this case, for example, it is conceivable to provide the control unit with a configuration capable of monitoring changes in power consumption in a power load in which power consumption is undetermined.
- the fourth control is executed after the third control, and then the discharge control is executed.
- the present invention is not limited to this, and the discharge control may be executed after the third control, and then the fourth control may be executed.
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Abstract
Description
複数の蓄電部を備えた電源部からの放電を制御する電源制御装置であって、
前記複数の蓄電部の接続の状態を切り替える切替部と、
前記切替部を制御する制御部と、
を有し、
前記切替部は、充電電流が前記複数の蓄電部の全体に供給され得る第1接続状態と、前記複数の蓄電部を複数の蓄電部領域に分割した第2接続状態とに切り替わり、
前記切替部が前記第2接続状態のときに、各前記蓄電部領域から各々の対象負荷に対してそれぞれ電力が供給される。
最初に本開示の実施態様を列記して説明する。
以下、本開示を具体化した実施形態1について説明する。
電源システム100は、主として、主電源部94、第1導電路81、電源部91、バイパス導電路72、電源制御装置1等を備える。
次に、制御部20による制御を説明する。
制御部20は、所定の開始条件の成立に応じて図3の制御を実行する。具体的には、例えば、電源制御装置1が搭載された車両が始動状態となった場合(例えば、イグニッションスイッチ等の始動スイッチがオフ状態からオン状態に切り替わった場合)に図3で示す制御を実行する。
本開示の実施形態2に係る電源制御装置2を備える車載用電源システム200を、図3、図4、図5を参照して説明する。実施形態2に係る電源制御装置2は、電源部191が並列に接続された構成を有する点、バイパス導電路172の一端が電気的に接続される位置、切替部130の第2スイッチ132が設けられる位置等が実施形態1と異なる。実施形態1と同じ構成については、同一符号を付し、構造、作用及び効果の説明は省略する。
次に、実施形態2における、制御部20による制御を説明する。
制御部20は、実施形態1と同様に、所定の開始条件の成立に応じて図3の制御を実行する。以下、制御部20による制御の説明において、実施形態1と同じ説明は省略する。
本開示は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本開示の技術的範囲に含まれる。
10…電圧変換部
12…充電回路
20…制御部
30,130…切替部
31…第1スイッチ
32,132…第2スイッチ
33…第3スイッチ
34…第4スイッチ
72,172…バイパス導電路
81…第1導電路
85…電圧検知部
91,191…電源部
91A,91B,191A,191B…端子
92A,92B,92C,92D…蓄電部
94…主電源部
98A,98B…一の対象負荷(対象負荷)
98C…他の対象負荷(対象負荷)
100,200…車載用電源システム
G…基準導電路
P1,P11…第1位置
R1,R11…いずれか一の蓄電部領域(蓄電部領域)
R2,R12…いずれか他の蓄電部領域(蓄電部領域)
Claims (6)
- 複数の蓄電部を備えた電源部からの放電を制御する電源制御装置であって、
前記複数の蓄電部の接続の状態を切り替える切替部と、
前記切替部を制御する制御部と、
を有し、
前記切替部は、充電電流が前記複数の蓄電部の全体に供給され得る第1接続状態と、前記複数の蓄電部を複数の蓄電部領域に分割した第2接続状態とに切り替わり、
前記切替部が前記第2接続状態のときに、各前記蓄電部領域から各々の対象負荷に対してそれぞれ電力が供給される電源制御装置。 - 充電回路を備え、
前記制御部は、前記充電回路から前記電源部に前記充電電流が供給される場合に前記切替部を前記第1接続状態に切り替え、前記電源部から放電する場合に前記切替部を前記第2接続状態に切り替える請求項1に記載の電源制御装置。 - 電圧変換部を備え、
前記制御部は、所定の放電条件が成立した場合に、前記切替部を前記第2接続状態に切り替えた状態で前記電圧変換部を動作させ、
前記放電条件の成立に応じて前記第2接続状態で前記電圧変換部が動作する場合、分割された複数の前記蓄電部領域のいずれか一の前記蓄電部領域からの電力に基づき前記電圧変換部によって電圧変換された上で一の前記対象負荷に電力が供給され、いずれか他の前記蓄電部領域と他の前記対象負荷との間が前記電圧変換部を介さずに導通して他の前記対象負荷に電力が供給される請求項1又は請求項2に記載の電源制御装置。 - 前記切替部は、
主電源部と、前記電源部及び複数の前記対象負荷と、を接続状態と非接続状態とに切り替える第1スイッチと、
各前記蓄電部領域同士を接続状態と非接続状態とに切り替える第2スイッチと、
いずれか他の前記蓄電部領域と、他の前記対象負荷と、を接続状態と非接続状態とに切り替える第3スイッチと、
他の前記対象負荷と、前記主電源部と、を接続状態と非接続状態とに切り替える第4スイッチと、
を有しており、
前記切替部を前記第1接続状態から前記第2接続状態に切り替える際、前記制御部は、
前記第1スイッチによって前記主電源部と、前記電源部及び複数の前記対象負荷と、を接続状態から非接続状態に切り替える第1制御と、
前記第2スイッチによって各前記蓄電部領域同士を接続状態から非接続状態に切り替える第2制御と、
前記第4スイッチによって他の前記対象負荷と、前記主電源部と、を接続状態から非接続状態に切り替える第3制御と、をこの順に実行し、
次に、前記第3スイッチによっていずれか他の前記蓄電部領域と、他の前記対象負荷と、を非接続状態から接続状態に切り替える第4制御、又は前記電圧変換部を放電動作させる放電制御のいずれかを実行する請求項3に記載の電源制御装置。 - 前記第1接続状態のとき、前記切替部は、前記複数の蓄電部が直列に接続された状態を維持し、
前記第2接続状態のとき、前記切替部は、直列に接続された前記複数の蓄電部を複数の前記蓄電部領域に分割する請求項1から請求項4までのいずれか一項に記載の電源制御装置。 - 前記第1接続状態のとき、前記切替部は、前記複数の蓄電部が並列に接続された状態を維持し、
前記第2接続状態のとき、前記切替部は、並列に接続された前記複数の蓄電部を複数の前記蓄電部領域に分割する請求項1から請求項4までのいずれか一項に記載の電源制御装置。
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JP2011182521A (ja) * | 2010-02-26 | 2011-09-15 | Toyota Motor Corp | 電源システムおよびそれを搭載する車両 |
JP2018148733A (ja) * | 2017-03-08 | 2018-09-20 | 株式会社オートネットワーク技術研究所 | 車載用電源部の制御装置及び車載用電源装置 |
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