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:
Sep. 24, 1996
Filed:
Jul. 28, 1995
Masakatsu Urairi, Osaka, JP;
Toshimitsu Tachibana, Osaka, JP;
Kenji Matsumoto, Osaka, JP;
Toshihiko Shinomura, Osaka, JP;
Hiroyuki Iida, Osaka, JP;
Kazunori Kawamura, Osaka, JP;
Shuuji Yano, Osaka, JP;
Osamu Ishida, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Hitachi Maxell, LTD., Osaka, JP;
Abstract
An alkaline secondary battery comprising a negative comprising cadmium, zinc or iron or an oxide or thereof or a hydrogen absorbing alloy, a positive electrode comprising a metal oxide or a metal hydroxide, and a separator, which are all impregnated with an electrolyte comprising an alkaline aqueous solution is disclosed, wherein the separator is made of a polyolefin fiber sheet which has a wicking rate of pure water of at least 10 mm per 2 minutes when one end of the sheet is dipped in pure water at 20.degree. C. and 60% RH. Since the separator is chemically stable and exhibits sufficient hydrophilic properties, the battery retains a high electrode utilization even at a high rate discharging and has a practically sufficient cycle life.