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Casting process of plate grid of lead-acid storage battery

A technology of lead-acid batteries and grids, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of surface tension grid thermal cracking, shrinkage cavity, and different solubility, so as to reduce thermal expansion coefficient, enhance adhesion, Not easy to fall off effect

Active Publication Date: 2016-01-27
JIESHOU HUAYU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different dissolution temperatures of various additives in lead, their solubility is also different, and the different surface tensions of various additives will cause defects such as grid thermal cracking and shrinkage cavities.

Method used

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Embodiment Construction

[0014] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0015] A casting process for a lead-acid storage battery grid, comprising the following steps:

[0016] (1) First heat tin to 750°C, then slowly add lanthanum, yttrium and cerium, stir while adding, continue to stir for 10 minutes after all the metals are melted, then cool down to 500°C, drain the liquid, and cast tin-lanthanum-yttrium-cerium alloy ingot;

[0017] (2) Heating the tin-lanthanum-yttrium-cerium alloy ingot to 380°C, then adding silver, manganese, barium, chromium, silicon and potassium, continuing to heat to 500°C, keeping it warm and stirring for 20 minutes to obtain a tin master alloy;

[0018] (3) Heat the electrolytic lead to 600°C, then add the above-mentioned tin master alloy, and stir evenly to obtain the grid alloy liquid; ...

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PUM

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Abstract

The invention discloses a casting process of a plate grid of a lead-acid storage battery and belongs to the technical field of machining of the lead-acid storage batteries. The casting process comprises the following steps: preparing a plate grid alloy solution from the following components in weight percent: 0.946% of tin, 0.02% of lanthanum, 0.01% of yttrium, 0.01% of cerium, 0.003% of silver, 0.003% of manganese, 0.002% of barium, 0.002% of iron, 0.0015% of chromium, 0.0015% of silicon, 0.001% of potassium and 99% of lead; spraying a de-molding agent in a pre-heated mold cavity; casting by using a casting machine to prepare the plate grid. According to the casting process, by adding the tin, rare earth elements, the silicon and the potassium into the lead, the coefficient of thermal expansion is reduced, so that the plate grid is not easy to deform when being circularly charged and discharged; by adding the silver, the manganese, the barium, the iron and the chromium, the adhesion force between the plate grid and an active substance can be enhanced, so that the active substance is not easy to fall off, and deep charging and deep discharging capabilities of the storage batteries are facilitated and the circular charging and discharging service life is prolonged.

Description

Technical field: [0001] The invention relates to the technical field of lead-acid battery processing, in particular to a casting process for lead-acid battery grids. Background technique: [0002] With the rapid development of lead-acid battery technology and the continuous emergence of new materials and new processes, higher requirements are placed on the performance of lead-acid batteries such as water loss and overcharge resistance. Many domestic battery manufacturers also add additives such as selenium, sulfur, and arsenic to antimony-containing grid alloys to improve the corrosion resistance and hardness of the grid, improve overcharge resistance, and reduce water loss of the battery. However, due to the different dissolution temperatures of various additives in lead, their solubility is also different, and the different surface tensions of various additives will cause defects such as grid thermal cracking and shrinkage cavities. Therefore, it is necessary to optimize ...

Claims

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Application Information

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IPC IPC(8): H01M4/84H01M4/68H01M4/73
CPCH01M4/661H01M4/68H01M4/685H01M4/73H01M4/84Y02E60/10
Inventor 黄建平黄建新黄文
Owner JIESHOU HUAYU POWER SUPPLY
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