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:
Jan. 31, 2012
Filed:
Mar. 13, 2008
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 according to a battery model equation in every arithmetic cycle, and calculates an SOC based on a result of the estimation. A parameter characteristic map stores a characteristic map based on a result of actual measurement performed in an initial state (in a new state) on a parameter diffusion coefficient and a DC resistance in the battery model equation. The parameter change rate estimating unit estimates a DC resistance change rate represented by a ratio of a present DC resistance with respect to a new-state parameter value by parameter identification based on the battery model equation, using battery data measured by sensors as well as the new-state parameter value of the DC resistance corresponding to the present battery state and read from the parameter characteristic map.