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. 01, 1997
Filed:
Sep. 05, 1995
John J Rowlette, Monrovia, CA (US);
Bipolar Power Corporation, Whittier, CA (US);
Abstract
The Battery Plates with Lightweight Cores disclosed and claimed above solve the problems encountered by previous attempts to construct practical bipolar plates for lead-acid batteries. The preferred embodiment (10) includes a thin, lightweight, inexpensive metal core (12) with very high thermal and electrical conductivity. The lower or negative side (12b) of the core (12) is covered with a negative side protective layer (16) which defends the core (12) from an acidic environment. The upper or positive side (12a) of the core (12) is covered with a positive side protective layer (18) which safeguards the core (12) from a hostile oxidizing electrochemical environment. In the preferred embodiment, the core (12) is aluminum, the negative side protective layer (16) is lead and the positive side protective layer (18) is doped stannic oxide. Intermediate layers (14a & 14b) of copper or nickel may be placed between the core (12) and the negative and positive protective layers (16 & 18) to promote adhesion. Various alternative embodiments (20, 32, 42) that employ different combinations of materials are described in the specification. The invention may be implemented using positive and negative side seals (58 & 68).