Battery charge with temperature-sensitive cut-off switch

Details Battery charge with temperature-sensitive cut-off switch Battery charge with temperature-sensitive cut-off switch

1992-03-31

1993-10-05

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 2, H02J 704

Patent

active

052508927

ABSTRACT:
A battery charger includes a battery compartment removable from the charger socket. The battery compartment includes a temperature-sensitive switch which opens when the temperature of the battery exceeds a predetermined value during charging, thereby cutting off the main charging current. A permanent magnet is positioned on the socket portion of the charger. The magnet latches the temperature-sensitive switch in an open position after charging so long as the battery compartment is in the socket. The switch can be reset by separating the battery compartment from the socket. A current limiting resistor is connected in parallel with the switch to maintain a small charging current when the temperature-sensitive switch is open.

REFERENCES:
patent: 3928792 (1975-12-01), Mullersman et al.
patent: 3935525 (1976-01-01), Elson et al.
patent: 4164719 (1979-08-01), Young et al.
patent: 5031987 (1991-07-01), Norling

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