Protection circuit for secondary battery and abnormality detection system of secondary battery

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12266957
APP PUB NO 20220131392A1
SERIAL NO

17431302

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Abstract

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The safety is ensured in such a manner that an abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early and a warning is given to a user. A first protection circuit and a second protection circuit are provided for one secondary battery. The first protection circuit includes a memory circuit including a transistor including an oxide semiconductor. Combination of a plurality of protection circuits enables a complementary double protection system in charging, and the safety can be further enhanced.

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Patent Owner(s)

  • SEMICONDUCTOR ENERGY LABORATORY CO. LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ikeda, Takayuki Kanagawa, JP 407 4724
Isa, Toshiyuki Kanagawa, JP 65 9131
Tajima, Ryota Kanagawa, JP 164 1648
Takahashi, Kei Kanagawa, JP 407 3896

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