JPS5956370A - Lead-acid battery - Google Patents

Abstract

PURPOSE:To make uniform temperature distribution at the upper and lower parts of an electrolyte to prevent deterioration of a plate especially a negative plate by immersing in the electrolyte a lead or lead alloy pipe which contains an aqueous solution which does not corrode a lead material such as water, dilute sulfuric acid, and its both ends are sealed. CONSTITUTION:A pipe 4 comprising lead-antimony alloy contains dilute sulfuric acid 5 and its both ends are sealed. Excess amount of dilute sulfuric acid is filled in the pipe 4 under a reduced pressure. The pipe 4 is placed in vertical direction so as to its most part is immersed in an electrolyte. Dilute sulfuric acid inside the pipe 4 evaporates at high temperature part and condenses at low temperature part to transfer heat. Other aqueous solution which do not corrode lead may be filled in the pipe 4 instead of dilute sulfuric acid. Both surfaces of the pipe 4 may be covered with other thin materials if heat conductivity is not decreased remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead-acid battery with uniform temperature distribution in the upper and lower parts. ! Many oil charging methods are increasing the efficiency of charging energy and reducing the amount of water electrolysis caused by overcharging, and reducing the current in the early morning to prevent gas generation. In this case, monosulfuric acid produced by the charging reaction settles downward, and the specific gravity of the electrolyte in the lower part becomes larger than that in the upper part. This intimidation phenomenon is much more pronounced than the difference in specific gravity caused by a drop in temperature, and the uniformity and heat dissipation caused by convection, which are normally observed, are suppressed. However, the lower part may become abnormally hot during charging. This state is shown in FIG. 1. The temperature in the upper part is about 50"C, but the temperature of the electrolyte in the lower part exceeds 70"C, and the specific gravity of the liquid is close to 1.40.

In such an atmosphere of high temperature and high specific gravity, the 9-negative active material reacts with the electrolyte to generate hydrogen sulfide gas, converts into inactive lead sulfate crystals, and falls off, meaning that the negative plate rapidly deteriorates. Resulting in.

The present invention aims to eliminate the above-mentioned drawbacks of lead-acid batteries and to equalize the temperature distribution in the upper and lower parts. The gist is that both ends are sealed, and inside the water tank is filled with an aqueous liquid such as dilute sulfuric acid that hardly corrodes the surrounding materials.The main part of the tubular body made of lead alloy is immersed in the electrolytic solution.・In particular, setting the inside of the tubular body to 1 atmosphere or less at room temperature,
The inner and outer surfaces of the tubular body must be made of acid-resistant material other than lead alloy.

To explain the present invention in detail and its examples, (1) is 1! L clear and lid, j21 is positive
Negative M[i, 1 provisional i consisting of i and separator, +81
teeth! vIU, +4+ is a tubular body made of lead-anotimon alloy, both ends of which are sealed, and dilute sulfuric acid +51 is contained inside. To fill dilute sulfuric acid (51), reduce the inside of the tubular body (4) and then add an excess amount. The dilute sulfuric acid in the tubular body (4) evaporates in the storage area and condenses in the low temperature area, thereby transferring heat.

The 21/+ζ battery shown in FIG. 1 was charged under the same conditions as the conventional battery shown in FIG. 1, and the results are shown in FIG. The temperature between the upper and lower parts of the electrolyte is fairly uniform, with a temperature difference of about 5''C, and there is also the additional effect that the difference in specific gravity between the upper and lower parts is also small.

In addition to dilute sulfuric acid, the material to be filled in the tubular body +4X circle may be other aqueous solution 3- or water as long as it does not corrode the lead alloy or lead alloy.

The circular surface and outer surface of the tubular body (41) may be thinly coated with another material 1, such as glass, ceramic, plastic, etc., as long as it does not significantly impede heat conduction inside and outside the tubular body (4). It is preferable to connect the tubular body (4) with a negative one (-) because raFi is useful for transferring heat.

As described above, the present invention can make the temperature of the upper and lower parts of the electrolyte uniform by simply enclosing a small amount of water (FG) and installing a single lead pipe inside. It prevents deterioration, especially negative-temperature, and is effective in making lead-acid batteries more affordable.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the charging characteristics of a conventional lead-acid battery, Figure 2
3 is a schematic vertical cross-sectional view of a main part showing an embodiment of the lead layer pond according to the present invention, and FIG. 3 is an explanatory diagram showing the charging characteristics of the lead battery according to the present invention. (2)...lJk temporary group number group 3)......electrolyte (4)......, 1 Figure 30E

Claims (1)

[Claims] (1) Seal both ends and fill the internal water tank with dilute sulfuric acid or other water bath liquid that hardly corrodes lead materials.
This is a lead-acid battery in which most of the tubular body made of lead alloy is immersed and placed in an electrolyte. Lead layer 11II described in item (1) or item (2)
+.