Battery system

Abstract

To perform balancing of multiple batteries with a simple configuration.SOLUTION: A battery system includes a first battery, a second battery, a first charging inlet, a charger, and an electric circuit. The electric circuit can selectively configure a plurality of circuit structures including at least a first charging circuit structure and a first balancing circuit structure by selectively turning on and off a plurality of switches. In the first charging circuit structure, the first charging inlet is electrically connected to a first end of the charger, and the first battery and the second battery are electrically connected to a second end of the charger. In the first balancing circuit structure, the first battery is electrically connected to the first end of the charger, and the second battery is electrically connected to the second end of the charger.SELECTED DRAWING: Figure 1

Claims

1. It is a battery system, The first battery and the second battery, A first charging inlet that is detachably connected to an external power supply, A charger having a first end and a second end, and capable of controlling the power supplied from the first end to the second end, The first battery, the second battery, the first charging inlet, and the charger are electrically connected to an electrical circuit having a plurality of switches, Equipped with, The aforementioned electrical circuit can selectively configure multiple circuit structures, including at least a first charging circuit structure and a first balancing circuit structure, by selectively turning the multiple switches on and off. In the first charging circuit structure, the first charging inlet is electrically connected to the first terminal of the charger, and the first battery and the second battery are electrically connected to the second terminal of the charger. In the first balancing circuit structure, the first battery is electrically connected to the first terminal of the charger, the second battery is electrically connected to the second terminal of the charger, and the first charging inlet is electrically disconnected from the first terminal of the charger. Battery system.

2. The battery system according to claim 1, wherein the charger is a bidirectional charger capable of controlling the power supplied from the second end to the first end.

3. The battery system according to claim 1, wherein in the first charging circuit structure, the first battery and the second battery are connected in parallel.

4. The aforementioned plurality of circuit structures further include drive circuit structures, The battery system according to claim 1, wherein the drive circuit structure comprises the first battery and the second battery connected in series to an external load.

5. when the external power supply is an AC power supply, The battery system according to claim 1, wherein the charger is an AC charger.

6. The control device further comprises a control device capable of selectively executing a plurality of processes, including at least a balancing process, by controlling the plurality of switches and the charger. The battery system according to claim 1, wherein in the balancing process, the electrical circuit constitutes the first balancing circuit structure, and the charger supplies charging power from one of the first battery and the second battery to the other.

7. The charger, in the balancing process, When the voltage of the first battery is greater than the voltage of the second battery, charging power is supplied from the first battery to the second battery. The battery system according to claim 6, wherein when the voltage of the second battery is greater than the voltage of the first battery, charging power is supplied from the second battery to the first battery.

8. The control device is capable of further executing a first charging process as one of the plurality of processes. The battery system according to claim 6, wherein in the first charging process, the electrical circuit constitutes the first charging circuit structure, and the charger controls the charging power supplied from the external power source to the first battery and the second battery.

9. The battery system according to claim 8, wherein the control device performs the balancing process before performing the first charging process in at least a portion of the opportunities to perform the first charging process.

10. The battery system according to claim 9, wherein the control device performs the balancing process if the voltage difference between the first battery and the second battery exceeds a predetermined value before performing the first charging process.

11. The control device is When the first battery and the second battery are connected in parallel during the first charging process, the balancing process is performed before the first charging process is executed. The battery system according to claim 9, wherein when the first battery and the second battery are connected in series during the first charging process, the first charging process is performed without performing the balancing process.

12. The battery system according to claim 8, wherein the control device is capable of obtaining the scheduled time for the first charging process to be performed, and when the time until the scheduled charging time falls within a first predetermined time, it performs the balancing process.

13. The battery system according to claim 6, wherein the control device is capable of obtaining the scheduled time of use when the battery system will be used, and when the scheduled time of use is within a second predetermined time, it performs the balancing process.

14. It further comprises a second charging inlet that is detachably connected to an external DC charger and electrically connected to the aforementioned electrical circuit, The battery system according to claim 1, wherein the electrical circuit can further be configured as one of the plurality of circuit structures, a second charging circuit structure in which the first battery and the second battery are electrically connected to the second charging inlet.

15. The control device further comprises a control device capable of selectively executing a plurality of processes, including at least a balancing process and a second charging process, by controlling the plurality of switches and the charger. In the balancing process, the electrical circuit constitutes the first balancing circuit structure, and the charger controls the charging power supplied from one of the first battery and the second battery to the other. The battery system according to claim 14, wherein in the second charging process, the electrical circuit constitutes the second charging circuit structure, and charging power is supplied from the external DC charger to the first battery and the second battery via the second charging inlet.

16. The battery system according to claim 15, wherein the control device performs the balancing process before performing the second charging process in at least a portion of the opportunities to perform the second charging process.

17. The battery system according to claim 16, wherein the control device performs the balancing process if the voltage difference between the first battery and the second battery is greater than or equal to a predetermined value before performing the second charging process.

18. The control device is When the first battery and the second battery are connected in parallel during the second charging process, the balancing process is performed before the second charging process is executed. The battery system according to claim 16, wherein when the first battery and the second battery are connected in series during the second charging process, the second charging process is performed without performing the balancing process.

19. A battery system, The first battery and the second battery, A first charging inlet that is detachably connected to an external power supply, A charger having a first end and a second end, and capable of controlling the power supplied from the first end to the second end, The first battery, the second battery, the first charging inlet, and the charger are electrically connected to an electrical circuit having a plurality of switches, Equipped with, The electrical circuit can selectively configure multiple circuit structures, including at least a first charging circuit structure, a first balancing circuit structure, and a second balancing circuit structure, by selectively turning the multiple switches on and off. In the first charging circuit structure, the first charging inlet is electrically connected to the first terminal of the charger, and the first battery and the second battery are electrically connected to the second terminal of the charger. In the first balancing circuit structure, the first battery is electrically connected to the first terminal of the charger, and the second battery is electrically connected to the second terminal of the charger. In the second balancing circuit structure, the second battery is electrically connected to the first terminal of the charger, and the first battery is electrically connected to the second terminal of the charger. Battery system.

20. The control device further comprises a control device capable of selectively executing a plurality of processes, including at least a balancing process, by controlling the plurality of switches and the charger. In the aforementioned balancing process, When the voltage of the first battery is greater than the voltage of the second battery, the electrical circuit constitutes the first balancing circuit structure, and the charger supplies charging power from the first battery to the second battery. When the voltage of the second battery is greater than the voltage of the first battery, the electrical circuit constitutes the second balancing circuit structure, and the charger supplies charging power from the second battery to the first battery. The battery system according to claim 19.

Images