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:
Mar. 26, 2013
Filed:
Dec. 08, 2006
Hideaki Katayama, Osaka, JP;
Toshihiro Abe, Osaka, JP;
Nobuaki Matsumoto, Osaka, JP;
Yoshinori Sato, Osaka, JP;
Hideaki Katayama, Osaka, JP;
Toshihiro Abe, Osaka, JP;
Nobuaki Matsumoto, Osaka, JP;
Yoshinori Sato, Osaka, JP;
Hitachi Maxell, Ltd., Ibaraki-Shi, Osaka, JP;
Abstract
An electrochemical device having excellent safety at a high temperature is provided by using a separator for an electrochemical device, which is made of a porous film including a first separator layer and a second separator layer. The first separator layer includes, as a main ingredient, at least one kind of resin selected from the group consisting of resin A that has a melting point in a range of 80° C. to 130° C., and resin B that absorbs a nonaqueous electrolyte and swells due to heating and whose swelling degree is increased as the temperature rises, the second separator layer includes, as a main ingredient, a filler that has a heat-resistant temperature of not lower than 150° C., and at least one of the first separator layer and the second separator layer includes flakes.