Battery lockout circuit and battery pack using same

Details Battery lockout circuit and battery pack using same Battery lockout circuit and battery pack using same

1995-12-26

1997-02-18

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 40, 320 49, H01M 1046

Patent

active

056044151

ABSTRACT:
A lockout circuit is provided in a battery pack (10) which blocks charging by incompatible chargers while allowing charging by a compatible charger (12). The battery comprises a battery cell or cells (22), and a switch circuit (24). The switch circuit blocks charge current until a switch disable signal is provided to a switch disable contact (18). The switch circuit provides a one way bypass so that the battery may provide power to a device. To eliminate voltage drop while powering a device, a current sense circuit is provided to detect discharge current, and disable the switch circuit.

REFERENCES:
patent: 4686444 (1987-08-01), Park
patent: 5017856 (1991-05-01), Johnson, Jr.
patent: 5462814 (1995-10-01), Fernandez et al.
patent: 5518832 (1996-05-01), Fernandez et al.

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