Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Patent
1994-11-22
1996-03-05
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
429208, H01M 206
Patent
active
054966604
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a polar element for lead-acid storage batteries presenting an insert supporting the connections between polar elements, said insert being apt to be inserted or removed in relation to the pole.
2. General State of the Art
The polar elements belonging to the known technique, with reference to the traction batteries and to the stationary batteries in particular, present a pole made of lead which is obtained by means of a casting process and is electrically connected with the internal elements of the battery. An insert, usually made of copper or brass, is buried into the pole during the casting process itself. It is a known fact that the copper insert overhangs the actual lead pole and said insert forms the supporting and resting base of the connections which connect several polar elements with one another.
During the life of the battery it has been noticed that the polar elements, the lead poles of which are obtained by means of a casting process, present considerable porosity which allow the electrolyte to filter through the casting until it reaches the copper insert.
When the copper insert comes into contact with the electrolyte, there is a high oxidation of the copper itself thus considerably reducing the electrical conductivity of the copper until the electrical efficiency of the battery becomes irreparably impaired.
In this case it is necessary to proceed to the replacement of the poles, so as to eliminate the cause of the poor performance of the battery, due to the loss of conductivity of the copper inserts. It is easy to understand what inconvenience and what cost such operation involves, so that often it is more convenient to replace the battery.
The purpose of the present invention is to obviate the inconveniences now mentioned.
SUMMARY OF THE INVENTION
It is, therefore, the intention of the invention to realize a polar element in which the conductor insert, linked to the connections of the battery elements, does not suffer because of the previously mentioned aging process and in case of failure it may be removed and replaced very quickly and at a low cost.
It is also the intention to reduce drastically, if not entirely to eliminate, the phenomenon causing the insert to deteriorate and that is to eliminate the damages of the porosity of the material made of lead which forms the base of the pole.
All the purposes previously mentioned and others which will be better explained hereinafter, are reached thanks to the construction of a polar element for lead-acid storage batteries, realized according to the invention, wherein the polar element comprises: of the battery; the connection between polar elements connected to one another, wherein said insert is characterized in that it is connected with the pole, so that it can be removed therefrom, through connecting means interacting between the pole and the insert, said insert being removable in relation to the pole.
According to one particular embodiment of the invention, the pole is obtained by means of a cold forging process and has its hole threaded through roll forming, so that the insert can be screwed into it.
According to another embodiment, not represented in the drawings, the pole and the insert are connected to one another through a bayonet coupling.
Moreover, the pole according to the invention can be obtained through the known casting method.
BRIEF DESCRIPTION OF THE DRAWINGS
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. With reference to the drawings wherein: another within a battery; and
FIGS. 4A-4C respectively show a side sectional view of a bayonet coupling and sectional views along lines A--A and B--B of FIG. 4A.
DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to the mentioned FIGS., the polar element is indicated as a whole with 1 and presents a pole 2 which is electrically connected with the battery internal elements at the base. Said pole is made of lead and
REFERENCES:
patent: 19759 (1858-03-01), Doyle
patent: 1982801 (1934-12-01), Gerking
patent: 3644149 (1972-02-01), Coffey et al.
patent: 4272592 (1981-03-01), Miyagawa
patent: 4545927 (1985-10-01), Railsback
patent: 4816184 (1989-03-01), Fukuda et al.
patent: 5018520 (1991-05-01), Hubner et al.
patent: 5034157 (1991-07-01), Merrell et al.
Chaney Carol
Kalafut Stephen
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