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:
Mar. 01, 2022
Filed:
May. 22, 2020
Applicant:
Takashi Takeda, Tokyo, JP;
Inventor:
Takashi Takeda, Tokyo, JP;
Assignee:
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J 7/00 (2006.01); H02H 7/18 (2006.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01); H01M 50/572 (2021.01);
U.S. Cl.
CPC ...
H02H 7/18 (2013.01); H01M 10/44 (2013.01); H01M 10/48 (2013.01); H01M 50/572 (2021.01); H02J 7/0031 (2013.01); H02J 7/00302 (2020.01); H02J 7/00304 (2020.01); H02J 7/00306 (2020.01);
Abstract
A secondary battery protection circuit for protecting a secondary battery, including: a low-voltage detecting circuit configured to detect a voltage across the secondary battery that is lower than a second voltage for low voltage detection, the second voltage being set to be lower than a first voltage for overdischarge detection; and a switching circuit configured to cause a gate of a charge control NMOS transistor to be fixed at a potential at a high side power supply terminal, upon detecting, by the low-voltage detecting circuit, that the voltage across the secondary battery is lower than the second voltage for low voltage detection.