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:
Oct. 19, 2010
Filed:
Apr. 19, 2005
Tsumoru Ohata, Kyoto, JP;
Junji Nakajima, Osaka, JP;
Tetsuya Hayashi, Osaka, JP;
Shigeo Ikuta, Kagoshima, JP;
Akiko Fujino, Osaka, JP;
Eitaro Nakamura, Tokyo, JP;
Tsumoru Ohata, Kyoto, JP;
Junji Nakajima, Osaka, JP;
Tetsuya Hayashi, Osaka, JP;
Shigeo Ikuta, Kagoshima, JP;
Akiko Fujino, Osaka, JP;
Eitaro Nakamura, Tokyo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A method for producing a lithium ion secondary battery includes the steps of: forming a positive electrode mixture layer on a positive electrode substrate to obtain a positive electrode; forming a negative electrode mixture layer on a negative electrode substrate to obtain a negative electrode; forming an electronically insulating porous film that is bonded to a surface of at least one of the positive electrode and the negative electrode; interposing a separator between the positive electrode and the negative electrode to form an electrode plate assembly; and impregnating the electrode plate assembly with a non-aqueous electrolyte. The step of forming a porous film includes the steps of: preparing a porous film paste that contains a film binder comprising a thermo-cross-linkable resin and a particulate filler; and applying the porous film paste onto a surface of at least one of the positive electrode and the negative electrode and heating the resultant applied film.