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. 30, 2006
Filed:
Nov. 03, 2005
Toshiaki Nakanishi, Toyohashi, JP;
Keiichi Minamiura, Utsunomiya, JP;
Toshiaki Nakanishi, Toyohashi, JP;
Keiichi Minamiura, Utsunomiya, JP;
Panasonic EV Energy Co., Ltd., Kosai, JP;
Abstract
A voltage measurement partmeasures voltage Vn for each of the blocks of a battery pack, electric current In is measured with the same timing by a current measuring circuit, and a countercounts the number of times an effective load power Pn obtained from a product of the electric current and voltage of each block by an electric power computation partexceeds permissible electric power values Pcn and Pdn calculated by a permissible electric power computation part, such that when the count value is equal to or higher than a preset value, a decision partoutputs a contactor opening request signal Copen so as to bring the contactors into an open state and protect the battery pack.