Devices and methods for protection of rechargeable elements

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United States of America Patent

PATENT NO 6331763
SERIAL NO

09425519

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Importance

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Abstract

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A protection circuit for use with a charger and a chargeable element, such as a rechargeable lithium ion battery, comprises a shunt regulator having a threshold ON voltage coupled in parallel across the chargeable element, and a temperature-dependent resistor, e.g., a positive temperature coefficient device, coupled in series between the charger and the chargeable element. The temperature dependent resistor is thermally and electrically coupled to the shunt regulator, wherein the first variable resistor limits current flowing through the shunt regulator if the current reaches a predetermined level less than that which would cause failure of the regulator, due to ohmic heating of the regulator.

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Patent Owner(s)

Patent OwnerAddress
LITTELFUSE INC8755 WEST HIGGINS ROAD SUITE 500 CHICAGO IL 60631

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beaufils, Jean-Marc Mountain View, CA 4 233
Cogan, Adrian Redwood City, CA 7 346
Dallemange, Bernard Osny, FR 4 264
Gozlan, Gilles Le Mesnil Theribus, FR 6 294
Luan, Jiyuan Fremont, CA 11 307
Thomas, Brian San Francisco, CA 114 2786
Thornton, Neill Turlock, CA 14 388
Toth, James San Carlos, CA 28 608

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