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:
Aug. 16, 1994
Filed:
Dec. 24, 1992
Dieter Bechtold, Bad Vilbel, DE;
Jurgen Vollbert, Hattersheim, DE;
Varta Batterie Aktiengesellschaft, Hanover, DE;
Abstract
A lead storage battery is filled with electrolyte in two steps. In a first step, the filling electrolyte is a sulfuric acid which does not contain a gelling agent, and the amount of electrolyte introduced into the battery casing is selected so that the electrolyte fills only the pores in the active compound of the electrodes and the pores of the separators (to the extent that they are capable of retaining the absorbed liquid by capillary action). In a second step, the filling electrolyte is a thixotropic mixture of sulfuric acid and silicic acid, which fills the remaining electrolyte space. The state of the electrode plates that are used (i.e., formed or unformed) determines the density of the sulfuric acid used in both portions of the filling process. In the case of formed plates, the density conforms to the normal final acid density for a charged storage battery. In the case of unformed plates, the acid is diluted so that the density reaches the normal final acid density during subsequent formation of the storage battery, which can be performed as a monobloc formation.