| 摘要 |
A battery charge/discharge power supply apparatus for saving electric energy when performing charge/discharge operation of a storage battery. The power supply apparatus includes a direct current power source for switchably connected to the storage battery, an auxiliary battery switchably connected to the storage battery, and a converter provided between the storage battery and the auxiliary battery. The storage battery is charged by the power supplied from the auxiliary battery in the charge cycle of the storage battery. The auxiliary battery is charged by the discharge power from the storage battery in the discharge cycle of the storage battery. The direct current power source replenishes shortage of a power capacity in the auxiliary battery.
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