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:
Jul. 13, 2004
Filed:
Jan. 17, 2003
Takao Uyama, Hirakata, JP;
Daisuke Yoshida, Moriguchi, JP;
Toshihiko Izumikawa, Moriguchi, JP;
Yasushi Hirakawa, Moriguchi, JP;
Susumu Yamanaka, Higashiosaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A coin-shaped battery includes a cathode case ( ) having a crimp portion ( ) in the periphery of a bottom face ( ), and an anode cap ( ) having a flange ( ) with an extended portion ( ) and a turn-up portion ( ). Openings of cathode case ( ) and the anode cap ( ) are sealed by crimping with a gasket ( ) interposed therebetween, so that the gasket ( ) is compressed between the crimp portion ( ) having a U-shaped cross section, the flange ( ), the extended portion ( ) and the turn-up portion ( ) to effect reliable sealing. Thus, it is possible to disperse a deformation pressure, which is generated by bulge of the cathode case ( ) and the anode cap ( ) caused with a rise in internal pressure of the battery under severe working conditions such as use under a high temperature. As a result, the coin-shaped battery having improved liquid leakage resistance in the crimped portion is provided.