The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2025
Filed:
Oct. 16, 2019
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Kei Takahashi, Isehara, JP;
Takayuki Ikeda, Atsugi, JP;
Takanori Matsuzaki, Atsugi, JP;
Munehiro Kozuma, Atsugi, JP;
Hiroki Inoue, Atsugi, JP;
Ryota Tajima, Isehara, JP;
Yohei Momma, Isehara, JP;
Mayumi Mikami, Atsugi, JP;
Kazutaka Kuriki, Ebina, JP;
Shunpei Yamazaki, Setagaya, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Abstract
A battery control circuit with a novel structure, a battery protection circuit with a novel structure, and a power storage device including either of the battery circuits are provided. The power storage device includes a first circuit portion, a second circuit portion, a third circuit portion, and a secondary battery; the first circuit portion has a function of controlling charging of the secondary battery; the first circuit portion has a function of supplying the start time and the end time of the charging of the secondary battery to the third circuit portion; the second circuit portion has functions of generating a first voltage and a first current and supplying them to the third circuit portion; the third circuit portion has a function of generating a second voltage by charging the first current in a capacitor; and the third circuit portion has a function of comparing the first voltage and the second voltage.