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:
Jul. 12, 2005
Filed:
Jan. 17, 2002
Norikazu Iwasaki, Tochigi, JP;
Hisaya Tamura, Tochigi, JP;
Kazutaka Furuta, Tochigi, JP;
Masami Kawazu, Tochigi, JP;
Norikazu Iwasaki, Tochigi, JP;
Hisaya Tamura, Tochigi, JP;
Kazutaka Furuta, Tochigi, JP;
Masami Kawazu, Tochigi, JP;
Sony Chemicals Corp., Tokyo, JP;
Abstract
A protective circuit for a secondary battery is formed with a heater and a thermistor that are connected in parallel, and a main fuse is connected in series with the parallel circuit. In a secondary battery equipped with this protective circuit, a charging/discharging current passes through the protective circuit and is limited by the operation of the thermistor when the voltage applied during abnormal conditions is relatively low. On the other hand, the current will cause the main fuse to blow when the voltage during abnormal conditions is high.