Patent ID: 9006932
Filing Date: 2015-04-14
Classification: H01J,H01M,H02J,Y02B,Y02E

Abstract:
1. A power supply system comprising: a first switching element connected in series with a first power supply device; a second switching element connected in series with a second power supply device; a third switching element connected in series with the first power supply device; a fourth switching element connected in series with the second power supply device; and a control circuit section including a comparator connected to the first and second power supply devices and an inverter connected in series between the first switching element and an output terminal of the comparator, wherein the control circuit section is configured to control an ON/OFF state of the first and second switching elements so that the first switching element is in an ON state and the second switching element is in an OFF state when an inter-terminal voltage of the first power supply device is greater than an inter-terminal voltage of the second power supply device, and the first switching element is in an OFF state and the second switching element is in an ON state when the inter-terminal voltage of the first power supply device is less than the inter-terminal voltage of the second power supply device, wherein the control circuit section is configured to apply a charge voltage to the first or second power supply device and control an ON/OFF state of the third and fourth switching elements so that the third switching element is in an ON state and the fourth switching element is in an OFF state when the inter-terminal voltage of the first power supply device is greater than an inter-terminal voltage of the second power supply device, and the third switching element is in an OFF state and the fourth switching element is in an ON state when the inter-terminal voltage of the first power supply device is less than the inter-terminal voltage of the second power supply device.