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:
Feb. 26, 2008
Filed:
Mar. 05, 2004
Katsuya Kawano, Takasaki, JP;
Motoo Tadokoro, Itano-Gun, JP;
Fumiyoshi Yoshinari, Tokushima, JP;
Sanyo Electric Co. Ltd., Osaka, JP;
Abstract
A hermetically sealed battery is provided, equipped with a opening sealing unitincluding a Positive Temperature Coefficient (PTC) element without reducing the volume of the outside can, and capable of preventing the generation of a large current in case a short circuit occurs as well as enhancing operational security. The opening sealing unitaccording to the invention comprises a bottom platefor closing the opening of the outside can, a positive electrode capforming a space for storing a pressure valve, said positive electrode cap being used as a terminal for the positive electrode, a resilient valvehaving a steel plateon the upper surface, a springand a PTC element ringdisposed on the flangein the positive electrode cap. An insulation gasketis mounted onto the periphery of the opening sealing unitto hermetically close the opening of the outside can