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:
Sep. 03, 2013
Filed:
Oct. 05, 2010
Kenji Takahashi, Aichi, JP;
Yuji Nishi, Aichi, JP;
Tetsuya Fuchimoto, Aichi, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
An estimation apparatus has a controller which estimates an internal reaction of a secondary battery. The controller calculates a voltage drop amount due to an internal resistance of the secondary battery by using an expression (I): where ΔV represents the voltage drop amount, R represents a gas constant, T represents a temperature, α represents an oxidation reduction transfer coefficient (α=0.5) of an electrode, β represents a correction coefficient (0<β<1), F represents the Faraday constant, I represents a discharge current, Rr represents a component of a reaction resistance included in the internal resistance, and Rd represents a component of a direct-current resistance included in the internal resistance.