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:
May. 31, 2011
Filed:
Apr. 20, 2006
Iichiro Mori, Hyogo, JP;
Iichiro Mori, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A protection circuit is provided for protecting a secondary battery from overcharging and excessive discharge current by a simple circuit. The protection circuit is provided with a connection terminal (T) for connecting the secondary battery (); a connection terminal (T) for connecting a charging device for charging the secondary battery () and/or a load device driven by a discharge current from the secondary battery (); a bimetal switch (SW) that is provided between the connection terminals (T, T) and turned off in the case of exceeding a specified temperature set beforehand; a heater (R) for heating the bimetal switch (SW); and an integrated circuit (IC) for turning the bimetal switch (SW) off by causing the heater (R) to generate heat if a voltage applied to the connection terminal (T) by the secondary battery () exceeds a preset reference voltage.