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:
Jun. 19, 2012
Filed:
Jun. 16, 2009
Shoichi Nishiyama, Fukushima, JP;
Masaru Hiratsuka, Kanagawa, JP;
Hiroyuki Suzuki, Chiba, JP;
Takehiko Tanaka, Fukushima, JP;
Shoichi Nishiyama, Fukushima, JP;
Masaru Hiratsuka, Kanagawa, JP;
Hiroyuki Suzuki, Chiba, JP;
Takehiko Tanaka, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
A battery pack includes one or more cell blocks in which one or more secondary battery cells are connected in series and/or in parallel, and a control section for measuring a voltage of the one or more cell blocks to detect an abnormality of a cell block on the basis of a measurement result. The control section calculates a time differential of the voltage for the one or more cell blocks on the basis of the measured voltage, extracts a first time differential which is maximum and a second time differential which is minimum from the time differentials of the voltage for the one or more cell blocks, and determines that a cell block corresponding to the second time differential is abnormal in a case where a difference between the first time differential and the second time differential is less than a prescribed value.