Battery charger having a battery discharge prevention circuit

Details Battery charger having a battery discharge prevention circuit Battery charger having a battery discharge prevention circuit

1996-03-26

1998-06-16

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 49, 320 55, H01M 1046, H02J 706

Patent

active

057676577

ABSTRACT:
A battery charger (10) avoids discharging a battery (12) when the battery is connected to the charger and the charger is unpowered. The charger comprises a control circuit (18) which is switchably connected to an input power line (26) by a switch (28). The switch is actuated by a circuit which is responsive to the input voltage, and causes the switch to close only when the input voltage is above a preselected level, which is preferably substantially higher than the nominal battery voltage.

REFERENCES:
patent: 4291266 (1981-09-01), Portmann
patent: 5039928 (1991-08-01), Nishi et al.
patent: 5477124 (1995-12-01), Tamai

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