Process for producing a lead storage battery with a thixotropic

Details Process for producing a lead storage battery with a thixotropic Process for producing a lead storage battery with a thixotropic

1992-12-24

1994-08-16

Springer, David B.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

205 65, 205 6, H01M 1010

Patent

active

053385969

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.

REFERENCES:
patent: 4929251 (1990-05-01), Jache

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