Battery charger with redundant protection circuits

Details Battery charger with redundant protection circuits Battery charger with redundant protection circuits

1998-06-17

2000-03-28

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

320134, H02J 700

Patent

active

060436271

ABSTRACT:
A battery charging system with redundant overcharge protection. The voltage across a plurality of series connected battery cells as well as the voltage across each individual cell is monitored both at a battery module and a host charging system. In the event an overcharging situation is detected, by the battery module, a first switch is open-circuited to prevent overcharging. In the event an overcharging situation is detected in the host system via a communication channel with the battery module or damage to the first switch is detected, a second switch is open-circuited in the host system to prevent overcharging, thus providing a redundant level of security against overcharging the battery cells.

REFERENCES:
patent: 5608304 (1997-03-01), Okumura

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