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:
Nov. 27, 2007
Filed:
Feb. 26, 2004
Satoru Fukuoka, Sumoto, JP;
Seiji Morita, Sumoto, JP;
Nobuhiro Nishiguchi, Sumoto, JP;
Satoru Naruse, Sumoto, JP;
Masayuki Muraki, Hyogo, JP;
Masahiro Imanishi, Susono, JP;
Satoru Fukuoka, Sumoto, JP;
Seiji Morita, Sumoto, JP;
Nobuhiro Nishiguchi, Sumoto, JP;
Satoru Naruse, Sumoto, JP;
Masayuki Muraki, Hyogo, JP;
Masahiro Imanishi, Susono, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
The present invention provides a cell that does not impair heat resistant safety and electrochemical characteristics such as a discharge characteristic, and enhances long-period reliability. In the cell of the present invention, a nonaqueous solvent has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of 200° C. or higher, and has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of lower than 200° C.; and the total volume ratio at 23° C. of the compounds represented by the following general formula (1) is 95 to 100 percent of the nonaqueous solvent,X—(O—CH)n-O—Y  (1)(where X and Y are independently an alkyl group (number of carbons: 1-4), and n is 1-5).