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:
Dec. 24, 2013
Filed:
Aug. 28, 2009
Shuji Tomura, Nagoya, JP;
Takaji Umeno, Nisshin, JP;
Yasushi Amano, Aichi-ken, JP;
Yuji Nishi, Nagoya, JP;
Takeshi Takemoto, Nagoya, JP;
Nobuyasu Haga, Seto, JP;
Tetsuya Fuchimoto, Nagoya, JP;
Shuji Tomura, Nagoya, JP;
Takaji Umeno, Nisshin, JP;
Yasushi Amano, Aichi-ken, JP;
Yuji Nishi, Nagoya, JP;
Takeshi Takemoto, Nagoya, JP;
Nobuyasu Haga, Seto, JP;
Tetsuya Fuchimoto, Nagoya, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A battery state estimating unit estimates an internal state of a secondary battery in accordance with a battery model equation in every arithmetic cycle, and estimates a charging rate and a battery current based on a result of the estimation. A parameter estimating unit obtains a battery current measured by a sensor as well as the charging rate and the battery current estimated by the battery state estimating unit. The parameter estimating unit estimates a capacity deterioration parameter such that a rate of change in difference (estimation error) between a summed value of an actual current and a summed value of an estimated current with respect to the charging rate is minimized. A result obtained by estimating the capacity deterioration parameter is reflected in the battery model by the battery state estimating unit.