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:
Feb. 08, 2005
Filed:
Sep. 05, 2001
Asako Satoh, Yokohama, JP;
Masashi Fujiwara, Chigasaki, JP;
Kaoru Koiwa, Tokyo, JP;
Masahiro Sekino, Kawasaki, JP;
Nao Shimura, Kawasaki, JP;
Hiroyuki Hasebe, Chigasaki, JP;
Masayuki Oguchi, Yokohama, JP;
Masayuki Onuma, Yokohama, JP;
Asako Satoh, Yokohama, JP;
Masashi Fujiwara, Chigasaki, JP;
Kaoru Koiwa, Tokyo, JP;
Masahiro Sekino, Kawasaki, JP;
Nao Shimura, Kawasaki, JP;
Hiroyuki Hasebe, Chigasaki, JP;
Masayuki Oguchi, Yokohama, JP;
Masayuki Onuma, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
Disclosed is a nonaqueous electrolyte secondary battery, comprising a case having a wall thickness not larger than 0.3 mm, a positive electrode provided in the case, a negative electrode provided in the case and the negative electrode containing a carbonaceous material capable of absorbing-desorbing lithium ions, and a nonaqueous electrolyte provided in the case and the nonaqueous electrolyte containing a nonaqueous solvent including γ-butyrolactone and a solute dissolved in the nonaqueous solvent, wherein after being discharged to 3V with a current of 0.2 C at room temperature, the voltage reduction caused by the self-discharge at 60° C. is not larger than 1.5V in 3 weeks.