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:
Mar. 09, 2010
Filed:
Aug. 18, 2004
Hidehito Matsuo, Owariasahi, JP;
Tetsuro Kobayashi, Seto, JP;
Yuichi Itou, Toyota, JP;
Yasuhito Kondo, Toyoake, JP;
Yoshio Ukyo, Seto, JP;
Yoshiaki Kikuchi, Toyota, JP;
Motoyoshi Okumura, Chiryu, JP;
Hidehito Matsuo, Owariasahi, JP;
Tetsuro Kobayashi, Seto, JP;
Yuichi Itou, Toyota, JP;
Yasuhito Kondo, Toyoake, JP;
Yoshio Ukyo, Seto, JP;
Yoshiaki Kikuchi, Toyota, JP;
Motoyoshi Okumura, Chiryu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Abstract
A battery characteristic detecting method according to the invention includes a first step in which constant current discharge from a battery is performed at a predetermined current value, and a voltage during constant current discharge is measured; a second step in which overpotential for mass transfer control in the battery or resistance for the mass transfer control in the battery is calculated based on the voltage measured in the first step; and a third step in which a determination that a characteristic change has occurred in the battery is made, when the overpotential for the mass transfer control in the battery or the resistance for the mass transfer control in the battery calculated in the second step is larger than a predetermined threshold value.