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Rare earth grid alloy for lead-acid storage batteries and production method thereof

A lead-acid battery, grid technology, used in battery electrodes, circuits, electrical components, etc., can solve the problems of intergranular corrosion, early capacity loss, etc., and achieve the effect of improving strength, reducing alloy cold cracking, and improving corrosion resistance

Inactive Publication Date: 2017-05-17
HENAN CHAOWEI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a rare earth grid alloy for lead-acid batteries, which can effectively solve the problems of intergranular corrosion and early capacity loss in existing alloy grids, and at the same time improve the tensile strength and creep resistance of the grid alloy sex

Method used

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  • Rare earth grid alloy for lead-acid storage batteries and production method thereof
  • Rare earth grid alloy for lead-acid storage batteries and production method thereof
  • Rare earth grid alloy for lead-acid storage batteries and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The chemical composition of the rare earth grid alloy for lead-acid batteries is shown in Table 1: Example 1, wherein the rare earth element is Nd: the specific preparation method is as follows:

[0025] (1) Weigh the raw materials according to the chemical composition of the rare earth grid alloy for lead-acid batteries;

[0026] (2) heating the refined lead to 400-550 ℃ in a lead pot to make lead liquid;

[0027] (3) take 75%-85% of the weight of the lead liquid obtained in step (2), add Ca to it, and melt it completely at 500°C-600°C to form a Pb-Ca alloy solution; add rare earth elements to the rest of the lead liquid, at 600- The rare earth elements are completely melted at 720°C to form a Pb-rare earth element alloy solution;

[0028] (4) Mix the Pb-Ca alloy solution and the Pb-rare earth element alloy solution obtained in step (3) according to a certain proportion, add a certain proportion of Sn, Al and Ag, smelt, mix and stir evenly at 500-550 ° C, and cast Co...

Embodiment 2

[0030] The chemical composition of the rare earth grid alloy for lead-acid batteries is shown in Table 1: Example 2.

Embodiment 3

[0032] The chemical composition of the rare earth grid alloy for lead-acid batteries is shown in Table 1: Example 3.

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Abstract

The invention discloses a rare earth grid alloy for lead-acid storage batteries. The rare earth grid alloy for lead-acid storage batteries comprises the following raw materials in percentage by weight: 0.05-0.15% of Ca, 0.8-2.0% of Sn, 0.01-0.05% of Al, 0.01-0.02% of Ag, 0.05-0.15% of rare earth element and the balance of Pb, wherein the rare earth element may be one or more of Nd, Y and Sm. The rare earth element added to the grid alloy improves the corrosion resistance of the alloy, prolongs the cycle lives of the storage batteries, strengthens the charge receptivity of the batteries, and obviously improves the early capacity loss phenomenon of the batteries.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a rare earth grid alloy for lead-acid batteries and a production method thereof. Background technique [0002] With the continuous development of the new energy industry, the continuous emphasis on environmental protection and the rational use of resources, the requirements for lead-acid batteries are getting higher and higher, and the high performance of lead-acid batteries is pursued, and the corrosion resistance, deep cycle and Charge acceptance, etc. Among them, grid alloys play an important role in batteries, and improving the performance of alloys is a very important direction. [0003] In lead-acid batteries, the grid mainly acts as a supporting active material and as a current collector in the charging and discharging process. Therefore, there are great requirements for the corrosion resistance and electrical conductivity of the grid alloy. Now the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/68H01M4/73H01M4/84
CPCH01M4/685H01M4/73H01M4/84Y02E60/10
Inventor 李松林闫新华张雷巩帅
Owner HENAN CHAOWEI POWER SUPPLY
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