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:
Aug. 16, 2005
Filed:
Nov. 24, 2003
Minoru Kotato, Ibarakai, JP;
Hitoshi Suzuki, Ibaraki, JP;
Takahiro Yamamoto, Tokyo, JP;
Akira Yajima, Tokyo, JP;
Minoru Kotato, Ibarakai, JP;
Hitoshi Suzuki, Ibaraki, JP;
Takahiro Yamamoto, Tokyo, JP;
Akira Yajima, Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
A&T Battery Corporation, Tokyo, JP;
Abstract
A non-aqueous secondary battery having an electrode group and a non-aqueous electrolytic solution, characterized in that: (1) the electrode group is contained in a casing made of a sheet having a resin layer with a thickness of 0.5 mm or less, (2) the non-aqueous solvent contains γ-butyrolactone, ethylene carbonate, at least one vinylene carbonate compound and at least one vinylethylene carbonate compound, (3) the amounts of the vinylene carbonate compound, the vinylethylene carbonate compound and sum total of both are, respectively, 0.01 to 5% by weight, 0.01 to 5% by weight and 0.02 to 6% by weight, based on the total weight of the non-aqueous solvent, and (4) the amounts of the γ-butyrolactone and the ethylene carbonate are, respectively, 50% by volume or more and 10% by volume or more, based on the total volume of the non-aqueous solvent.