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:
Nov. 18, 2003
Filed:
Apr. 27, 2001
Tamiji Nagai, Kanagawa, JP;
Tamon Ikeda, Tokyo, JP;
Kazuo Yamazaki, Kanagawa, JP;
Makoto Kamoshida, Tokyo, JP;
Tadahisa Yamamoto, Kanagawa, JP;
Kuniharu Suzuki, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A battery pack BP having terminals T , T , and T , a detecting circuit, a signal generating circuit, a temperature, voltage, and current detecting circuit, a switching circuit, and a secondary battery connected to the switching circuit. A first external signal generating unit may be connected to terminals T and T and a second external signal generating unit may be connected to terminals T and T . The detecting circuit detects whether the first or second external signal generating units has been connected. In so doing, the detecting circuit may detect an impedance of the first external signal generating unit and may detect a terminal voltage of the second external signal generating unit. The on/off operations of the switching circuit SW may be controlled in accordance with the detection result.