Cover for electrolytic batteries

Abstract

Cover for electrolytic batteries, comprising a primary cover (1) adapted to be fixed on a container of electrolytic cells and provided with a plurality of openings (41, 51) for filling with electrolyte for respective electrolytic cells of the container, the walls of the openings (41, 51) being crossed transversely by a common gas collection channel (7), the cover comprising at least one secondary cover (2) which can be fixed on the upper face (3) of the primary cover (1) to cover the openings (41, 51), the secondary cover (2) comprising a plurality of caps (42, 52), which protrude from it and can engage respectively in the openings (41, 51) of the primary cover (1), each one of the caps (42, 52) being provided with a radial expansion (422, 522) adapted to engage in a gas-tight manner on the wall of the respective opening (41, 51) between the common gas collection channel (7); and the upper face (3) of the primary cover (1), the caps (42, 52) being not accessible when the secondary cover (2) is fixed on the upper face (3) of the primary cover (1).

Description

technical field [0001] The invention relates to a cover for an electrolytic accumulator. Background technique [0002] Electrolyte secondary batteries (for example, lead-acid secondary batteries) are used in motor vehicles mainly to provide electric power supply required to start an engine and various electric devices. Electrolyte accumulators generally consist of a container which is closed at the top by a cover and which is internally divided into a number of electrolytic cells, each of which is filled with a liquid electrolyte (e.g. sulfuric acid aqueous solution) and immersed in paired electrodes (for example, paired electrodes made of lead). [0003] Manufacture of this type of accumulator requires pouring liquid electrolyte into the respective electrolytic cells after the cover has been permanently fixed to the container by welding or other means. For this purpose, conventional covers comprise openings at each electrolytic cell of the container, which enable the inje...

AI Technical Summary

Problems solved by technology

[0010] It is noted that the disadvantages of conventional accumulators are that the caps of the injection openings are closed because a plurality of caps must be assembled on a heavy and bulky structure (for example, an accumulator container filled with electrolyte and closed at the top by a cover). Very complicated

[0014] A further problem arises in centralized exhaust systems due to the fact that frit is present on said cover during battery manufacturing operations, such as during injection and initial charging; therefore, during manufacture before it is even used , the frit material may have been impregnated into the electrolyte

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