Filling mat-immobilized-electrolyte batteries

Details Filling mat-immobilized-electrolyte batteries Filling mat-immobilized-electrolyte batteries

1987-05-27

1988-05-10

Weisstuch, Aaron

Metal working

Method of mechanical manufacture

Electrical device making

H01M 1016

Patent

active

047432705

ABSTRACT:
The present invention comprehends a method of filling a mat-immobilized-electrolyte type, Pb-acid storage battery with electrolyte wherein a predetermined quantity of sulfuric acid sufficient to wet substantially the entire internal surface area of the mats and electrodes is metered into an empty cell container. Thereafter, an unformed cell element is inserted into the pre-filled container and therein progressively immersed into the acid at a sufficiently slow rate as to achieve substantial completion of the initial pickling reaction in the region of the electrode adjacent the front of electrolyte as it advances toward the top of the element. The immersion rate will preferably not be substantially greater than the rate at which the electrolyte wicks up into the mat so that the initial pickling reaction occurs essentially on either side of the wetted portion of the mat. Under these conditions, any gases generated during the initial pickling reaction, as well as any air in the mat, can freely vent from the element via the pores in the unimmersed portions of the mat. Such venting of the gases through the unimmersed portion of the mat and displacement thereof upwardly out of the element by the moving front of the electrolyte virtually eliminates the formation of pockets of gas or dilute electrolyte within the element.

REFERENCES:
patent: 4525926 (1985-07-01), Pearson

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