Overcharge preventing device

Details Overcharge preventing device Overcharge preventing device

1998-07-26

1999-12-14

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

With nonbattery electrical component electrically connected...

429 62, 429 90, 429 61, 320134, 320136, H01M 1400

Patent

active

060014970

ABSTRACT:
An overcharge preventing device for a high energy density battery such as a lithium ion battery comprises a voltage sensor means for sensing a voltage of a battery that is being charged, a current feeder means for feeding a current to a heat generating means when a voltage sensed by said voltage sensor means exceeds a preset voltage, and a repeatedly usable thermal actuator means that is thermally coupled to said heat generation means incorporated in a charging current circuit. Upon overcharging of the battery, the thermal actuator means is actuated by heat generated from the heat generating means to interrupt feeding of a charging current to the battery. Upon elimination of an overcharged state, the charging current circuit in the thermal actuator means is resumed to recharge the battery.

REFERENCES:
patent: 5252411 (1993-10-01), Yokokawa et al.
patent: 5853908 (1998-12-01), Okutoh

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