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. 11, 2001
Filed:
Oct. 07, 1998
Tadamitsu Azema, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A protection device for preventing swelling or breakage of a battery cell in response to over-charging and/or an over-current condition. The protection device is connected between an internal electrode and an external electrode within the battery cell and includes an electrically insulating casing and an electrically insulating and flexing lid member for sealing an inner portion of the casing. A breakable electrically conductive member is positioned within the sealed inner portion that electrically connects wiring members. The lid member includes a projection which abuts against a central portion of the electrical conductive member. In an over-charge or over-current condition, increased pressure within the battery cell causes the projection of the lid member to press against the electrically conductive member, thereby causing the electrically conductive member to break such that the electrical connection between wiring members is broken.