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:
Nov. 04, 2003
Filed:
Apr. 19, 2001
Applicant:
Inventors:
Michael Cheiky, Santa Barbara, CA (US);
Glen Robles, Santa Maria, CA (US);
Assignee:
Zinc Matrix Power, Inc., Santa Barbara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/12 ; H01M 2/02 ;
U.S. Cl.
CPC ...
H01M 2/12 ; H01M 2/02 ;
Abstract
A battery that generates a gas during charge or discharge contains a two-stage vent system including a rigid case permeable to the gas such as ethyl celluose which is permeable to hydrogen gas disposed in an expandable envelope impermeable to the gas such as metallized plastic film. The gas permeates the walls of the case and expands the envelope. The gas is vented from the envelope through a porous plug such as microporous polyethylene sealed into the film.