Electricity: battery or capacitor charging or discharging – Battery or cell charging – With thermal condition detection
Patent
1997-09-17
1999-10-05
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With thermal condition detection
320134, H02J 704
Patent
active
059630191
ABSTRACT:
A battery pack having a battery protection circuit designed to prevent damages induced by a short circuit of outside terminals when the battery pack is separated from an electronic device. The battery pack comprises a chargeable battery cell; positive and negative battery terminals connectable to both ends of the battery cell; a temperature sensing terminal connected to the negative battery terminal through a thermistor for sensing a surface temperature of said battery pack; and a battery protection circuit electrically connected to open at least one power supply line between one of the positive terminal and the positive end of the battery cell and the negative terminal and the negative end the battery cell, when the battery pack is separated from an electronic device. The battery protection circuit is constructed by a switching controller having an input terminal connected to the temperature sensing terminal for detecting a thermal resistive value of the thermistor and generating a control signal when the thermal resistive value is below a preset level; a switching circuit provided along one of the power supply lines for cutting off the power supply line in response to the control signal; and a low power supplier connected in parallel with the positive power supply line for supplying an operating voltage battery control circuit of the electronic device which regulates the operating voltage. With this arrangement, short-circuit of the power terminals provided in the outside the battery pack can be effectively prevented in order to protect the quality of battery cell.
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Bushnell Esq. Robert E.
Luk Lawrence
Samsung Electronics Co,. Ltd.
Wong Peter S.
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