Method and apparatus to obtain the agitation of electrolyte...

Chemistry: electrical current producing apparatus – product – and – Process of cell operation – Electrolyte circulation

Reexamination Certificate

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Details

C429S070000, C429S095000

Reexamination Certificate

active

06214489

ABSTRACT:

The invention concerns a method to realize the agitation of electrolyte inside a lead-acid storage battery.
It is a known fact that during the recharging process of the lead-acid storage battery fumes develop, especially hydrogen, which sometimes remain adherent to the plates, thus preventing the dissolution of the lead sulfate and the restoration of the balance in the battery. It is important then to activate a circulation or an agitation of electrolyte which can prevent fume bubbles from forming and accumulating during the charging process.
According to a known technique, in order to overcome such incoveniences, and also to accelerate the charging times, the agitation of electrolyte is achieved by blowing air inside the box containing the electrolyte during the charging process. In such a way, a mixing of electrolyte, with a consequent uniformity of its density at the various levels of the storage-battery is obtained. The purpose which the invention proposes is to obtain an agitation of electrolyte inside a lead-acid storage battery during the charging process wherein such an agitation occurs without blowing air or other gasses from the exterior inside the electrolyte.
The main purpose of the invention and others which will be better pointed out hereinafter, are achieved by the proposed method to obtain the agitation of electrolyte inside a lead-acid storage battery comprising at least one canalization duct of electrolyte which is immersed inside the storage battery wherein said method is characterized in that it consists in:
connecting said canalization duct of electrolyte with a device realizing repetitive and alternative cycles of pressure decrease and of return to the initial pressure in the section of tube which connects said device to said canalization duct, said cycles causing the movement of electrolyte by sucking and dropping it respectively, in said canalization duct.
Advantageously, during a recharging process one or more storage batteries are connected to the device of the pressure variation, these being equipped each with one canalization duct, for instance a vertical pipe which sticks out of the lid of the storage battery. With a device for the pressure variation during the suction phase of said device, the electrolyte is made to go up along the canalization duct while, when the pressure returns to its normal values, the electrolyte comes down back to its original level. In realizing this variation of pressure with repetitive cycles and with a certain frequency, the electrolyte contained inside the storage battery is constantly pushed upwards and dropping down.
The consequent agitation of electrolyte causes a uniformity of density of electrolyte at the various levels of the box of the storage battery and also a stripping action on the electrolyte plates with a consequent removal of possible hydrogen fume bubbles which form during the recharge. This action of movement of electrolyte causes a decrease of the charging time and also a better uniformity of the charge of the plates with a consequent extension of the life span of the storage battery.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific example, while indicating a preferred embodiment of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description and from the drawings.


REFERENCES:
patent: 842389 (1907-01-01), Decker
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patent: 4269906 (1981-05-01), Schmechtig
patent: 4288501 (1981-09-01), Moody
patent: 4520080 (1985-05-01), Hashimoto
patent: 5340667 (1994-08-01), Stinson et al.
patent: 877555 (1942-12-01), None
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patent: 57-210564 (1982-12-01), None
patent: 57-208063 (1982-12-01), None
patent: 62-029060 (1987-02-01), None
patent: 62-122058 (1987-06-01), None

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