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. 03, 2014
Filed:
Sep. 11, 2009
Hiroshi Ohnishi, Oyama, JP;
Te Hyon Cho, Kuki, JP;
Yuka Kondo, Kusatu, JP;
Yoshikazu Miyata, Yokohama, JP;
Tatsuo Nakamura, Ouragunitakura-machi, JP;
Hiroaki Yamazaki, Tochigi, JP;
Masanao Tanaka, Kazo, JP;
Hiroshi Ohnishi, Oyama, JP;
Te Hyon Cho, Kuki, JP;
Yuka Kondo, Kusatu, JP;
Yoshikazu Miyata, Yokohama, JP;
Tatsuo Nakamura, Ouragunitakura-machi, JP;
Hiroaki Yamazaki, Tochigi, JP;
Masanao Tanaka, Kazo, JP;
Japan Vilene Company, Ltd., Tokyo, JP;
Abstract
Disclosed are a separator for lithium ion secondary batteries, having an inorganic layer formed from inorganic particles, characterized in that the inorganic particles have a particle diameter distribution in which the 50% cumulative particle diameter Dis in the range of 100 nm to 500 nm, the 10% cumulative particle diameter Dis 0.5Dor more, and the 90% cumulative particle diameter Dis 2Dor less; a method for manufacturing the separator; and a lithium ion secondary battery using the separator. When the separator is used, there can be produced a lithium ion secondary battery in which a short circuit caused by contraction or melting can be definitely prevented, as well as the current density applied to the electrodes during charging and discharging is uniform so that charging and discharging can be efficiently achieved.