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. 09, 2010
Filed:
Feb. 23, 2004
Kazutoshi Itagawa, Toyohashi, JP;
Masayoshi Yuki, Toyohashi, JP;
Hiroshi Yasuda, Toyohashi, JP;
Yoshihiro Murata, Toyohashi, JP;
Kazutoshi Itagawa, Toyohashi, JP;
Masayoshi Yuki, Toyohashi, JP;
Hiroshi Yasuda, Toyohashi, JP;
Yoshihiro Murata, Toyohashi, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A method of producing a grid for a lead-acid battery in accordance with the present invention includes the step of placing lead alloy foil on a base material sheet of a lead-calcium alloy and attaching the lead alloy foil under pressure to the base material sheet. The thickness t of the lead alloy foil, the thickness a of the base material sheet before the attaching, and the thickness b of the composite sheet after the attaching satisfy the relational expression 1.3≦(a+t)/b. The length L of the contact part of rollers with the base material sheet and the lead alloy foil is 10 mm or more. This makes it possible to secure good adhesion of the lead alloy foil to the base material sheet. Also, when this composite sheet is subjected to an expanding process and used as a positive electrode grid, it is possible to provide a lead-acid battery having excellent cycle life characteristics.