METHOD FOR RESTORING BATTERY CAPACITY, METHOD FOR RESTORING BATTERY ASSEMBLY CAPACITY, DEVICE FOR RESTORING BATTERY CAPACITY, AND DEVICE FOR RESTORING BATTERY ASSEMBLY CAPACITY

摘要

This method for restoring battery capacity is provided with an oxygen-generating/-discharging step (S2) for charging a nickel-metal-hydride storage battery (10), causing the generation of oxygen gas at the cathode (31), opening a safety valve device (80), and discharging at least a portion of the oxygen gas through the safety valve device (80) to the outside of the battery. The battery temperature (Ta) when starting the step (S2) is in the range of -30-10°C and the SOC is in the range of (30-Ta) to 100%, or the battery temperature (Ta) is in the range of 10-50°C and the SOC is in the range of 20-100%.