Battery charging system and electric vehicle with battery chargi

Details Battery charging system and electric vehicle with battery chargi Battery charging system and electric vehicle with battery chargi

1998-04-10

1999-09-14

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

One cell or battery charges another

Vehicle battery charging

320DIG13, 36414004, H02J 700, H02H 300

Patent

active

059528133

ABSTRACT:
When a charging control computer energized by an auxiliary battery detects a failure of an external AC power supply based on a change in the level of a failure on/off signal while a battery, mounted as an energy source on an electric vehicle, is being charged by the external AC power supply, the charging control computer stores a charged time up to the failure of the external AC power supply. Then, the charging control computer immediately changes from a normal power consumption mode to a low power consumption mode. When the charging control computer subsequently detects when the external AC power supply recovers from the failure, the charging control computer calculates a new target charging time from an initial target charging time and the charged time. Wasteful power consumption by the auxiliary battery during the failure of the external AC power supply is minimized. After the external AC power supply recovers from the failure, the charging control computer can charge the battery accurately to its fully charged state.

REFERENCES:
patent: 4697182 (1987-09-01), Swanson
patent: 5317752 (1994-05-01), Jewett et al.

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