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:
Jun. 25, 2013
Filed:
May. 25, 2010
Katsushi Nishie, Kyoto, JP;
Tomonori Kako, Kyoto, JP;
Yudai Kawasoe, Kyoto, JP;
Shinya Kitano, Kyoto, JP;
Sumio Mori, Kyoto, JP;
Katsushi Nishie, Kyoto, JP;
Tomonori Kako, Kyoto, JP;
Yudai Kawasoe, Kyoto, JP;
Shinya Kitano, Kyoto, JP;
Sumio Mori, Kyoto, JP;
GS Yuasa International Ltd., Kyoto, JP;
Abstract
A non-aqueous electrolyte secondary battery includes a positive electrode containing a positive-electrode active material, a negative electrode containing a negative-electrode active material, and a non-aqueous electrolyte, and is characterized in that the non-aqueous electrolyte contains 1.0 wt % or less of a compound represented by formula (1) and 2.0 wt % or less of a cyclic sulfate ester represented by formula (2), based on the total weight of the non-aqueous electrolyte. By using the non-aqueous electrolyte including a specified amount of the compound represented by formula (1) and a specified amount of the cyclic sulfate ester, when the battery is used at a low temperature after being stored at a high temperature, the increase of the internal resistance is inhibited.