Patent ID: 6181100
Filing Date: 2001-01-30
Classification: B60L,H02J,Y02T

Abstract:
A battery charge/discharge power supply apparatus for performing a charge/discharge operation on a storage battery, comprising:a direct current power source switchably connected to the storage battery to function as a power source and a discharge load;an auxiliary battery switchably connected to the storage battery; anda DC-DC converter provided between the storage battery and the auxiliary battery for adjusting voltages between the storage battery and the auxiliary battery and promoting the charge/discharge operation;wherein the storage battery is charged with an electric power discharged from the auxiliary battery through the converter in a charge cycle of the storage battery, and the auxiliary battery is charge by an electric power discharged from the storage battery through the converter in a discharge cycle of the storage battery, and the direct current power source replenishes shortage of a power capacity in the auxiliary battery; andwherein the discharged electric power from the storage battery is supplied to the auxiliary battery and the storage battery is charged by the discharged electric power from the auxiliary battery in response to charge/discharge conditions including a depth of discharge of the storage battery and the auxiliary battery.