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. 28, 2000
Filed:
Apr. 28, 1999
Fumio Daio, Kitakatsuragi-gun, JP;
Hiroaki Yoshino, Hirakata, JP;
Yoshimitsu Kaneda, Moriguchi, JP;
Takayuki Tanahashi, Moriguchi, JP;
Toshiyuki Shimizu, Sakai, JP;
Takeshi Inui, Yao, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
In a battery comprising a spirally wound electrode group, a lead plate drawn from one electrode of the electrode group and connected to the inner bottom surface of the battery case in electrically conducting relationship, and an insulating plate interposed between the lead plate and the electrode group, at least the bottom surface of the insulating plate is formed from a heat weldable material, and the lead plate is heat-welded to this heat weldable material. This construction not only serves to completely prevent accidental short-circuiting, but enables high-speed assembling of batteries.