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:
Jun. 15, 1993
Filed:
Mar. 27, 1991
Norma K Bullock, Pewaukee, WI (US);
James S Symanski, Grafton, WI (US);
Globe-Union, Inc., Milwaukee, WI (US);
Abstract
The present invention provides a method for maintaining the specific gravity of acid in a lead-acid battery within a predetermined range to prevent undesirable plate degradation and gassing during storage. Extended shelf-life is accomplished by employing a battery which is formed to the desired voltage and which is stored in a damp condition with the electrolyte maintained in a range which, in the most preferred embodiment, is between about 1.015 and 1.320. A desiccant, for example a gelled sulfuric acid desiccant, is placed in the battery housing, out of contact with the plates, to absorb the water vapor which is generated by the self-discharge reactions. The amount of desiccant is selected so that all the water vapor formed during such reactions is removed to maintain the specific gravity of the electrolyte in said range. Extended shelf-life results, and the desiccant can be used to form the battery electrolyte at the time it is desired to place the battery in service.