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, 2017
Filed:
Nov. 24, 2011
Toshihiko Mitsuhashi, Toyota, JP;
Yoshiyuki Ozaki, Neyagawa, JP;
Hideki Sano, Okazaki, JP;
Hajime Konishi, Ikoma, JP;
Toshihiko Mitsuhashi, Toyota, JP;
Yoshiyuki Ozaki, Neyagawa, JP;
Hideki Sano, Okazaki, JP;
Hajime Konishi, Ikoma, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
The present invention provides a method for producing a nonaqueous electrolyte secondary battery in which the drop in capacity retention rate is controlled by forming a coating in a more favorable state on the surface of the negative electrode active material. This production method comprises a step Sof preparing a battery assembly in which an electrode assembly is housed within a battery case, the electrode assembly including a positive electrode produced by forming a positive electrode active material layer containing at least a positive electrode active material, and a negative electrode produced by forming a negative electrode active material layer containing at least a negative electrode active material; a first injection step Sof injecting a nonaqueous electrolyte containing a specified additive into the battery case; a precharging step Sof forming the additive-derived coating on the surface of the negative electrode active material; a second injection step Sof injecting a nonaqueous electrolyte not containing an additive into the battery case; and a charge and discharge step Sof charging and discharging the battery assembly to a predetermined charging and discharge voltage.