Alloy material for high-energy accumulator grid and preparation method thereof

The invention relates to an alloy material and a battery technology, which is applied in the field of alloy materials for high-energy battery grids and its preparation, and can solve the problems of lower utilization rate of battery charge and discharge current, unsatisfactory deep charge and discharge resistance, increased battery self-discharge, and the like, so as to improve the Strength, cost-effective, and the effect of improving specific energy

Active Publication Date: 2010-02-24
TIANNENG BATTERY GROUP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deep charge and discharge resistance of Pb-Ca-Sn-Al alloy is still not ideal, and the Sn dissolved from the alloy is easy to form Sn ions in the electrolyte, which may increase the self-discharge of the bat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Based on 100% of the total weight of the alloy:

[0025] (1) Take 0.09% of Ca with a purity of 99.9%, 0.03% of Al with a purity of 99.9%, and 0.1% of Er (bait) with a purity of 99.9% and add it to the crucible electric furnace. At a temperature of about 700°C, vacuumize and nitrogen Protection for smelting, configuration of Ca-Al master alloy;

[0026] (2) in the master alloy that step (1) obtains, adding purity is 99.9% Sn0.8%, purity is 99.9% Zn0.03%, purity is 99.9%Pb98.95%, and the crucible electric furnace Adjust the temperature to 550-650°C. After the alloy is melted, stir it evenly, stand still, take a sample, remove the slag, and keep it at 550-650°C for 40 minutes before cooling. The cooling speed is controlled at 10 2 K / S~10 5 K / S;

[0027] (3) Use a direct-reading spectrometer to analyze the alloy chemical composition of the sample taken in step (2), and adjust the alloy composition according to the sample composition (adjust the alloy composition during t...

Embodiment 2

[0029] Based on 100% of the total weight of the alloy:

[0030] (1) Take 0.1% of Ca with a purity of 99.9%, 0.04% of Al with a purity of 99.9%, and 1% of Yb (ytterbium) with a purity of 99.9% and add it to a crucible electric furnace. At a temperature of about 700°C, vacuum and nitrogen Protection for smelting, configuration of Ca-Al master alloy;

[0031] (2) Adding Sn1.2% with a purity of 99.9%, Zn0.06% with a purity of 99.9%, and Pb97.6% with a purity of 99.9% to the master alloy obtained in step (1) for smelting.

[0032] All the other implementations are as in Example 1.

Embodiment 3

[0034] Based on 100% of the total weight of the alloy:

[0035] (1) Take 0.12% of Ca with a purity of 99.9%, 0.05% of Al with a purity of 99.9%, Yb (ytterbium) and Er (bait) with a purity of 99.9% and add 1.5% in total to the crucible electric furnace, Yb (ytterbium) and The mixing ratio of Er (bait) is 70% of Yb (ytterbium) and 30% of Er (bait). At a temperature of about 700°C, it is smelted under vacuum and nitrogen protection to configure a Ca-Al master alloy;

[0036] (2) Adding Sn1.6% with a purity of 99.9%, Zn0.09% with a purity of 99.9%, and Pb96.64% with a purity of 99.9% to the master alloy obtained in step (1) for smelting.

[0037] All the other implementations are as in Example 1.

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PUM

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Abstract

The invention discloses an alloy material for a high-energy accumulator grid and a preparation method thereof. The alloy material is prepared from the chemical compositions in percentage by weight: 0.06-0.14 percent of Ca, 0.1-2.0 percent of Sn, 0.01-0.06 percent of Al, 0.01 -0.1 percent of Zn, 0.001-2.0 percent of rare earth and the balance of Pb, wherein the rare earth is one or two of Er and Ybor the mixture of Ho, Er, Tm and Yb. The preparation method comprises the following steps: adding Ca, Al and the rare earth to a crucible electric cooker according to the mixture ratio, and vacuumizing and then introducing nitrogen gas for protection at the temperature of 600-900 DEG C, and then smelting; adding Pb, Sn and Zn according to the mixture ratio, smelting at the temperature of 550-650DEG C and evenly mixing the mixture, sampling after the mixture is static (regulating alloy compositions according to the sample compositions), then fishing out dregs, keeping the temperature at the temperature of 550-650 DEG C for 0.5-3 hours, and then cooling; controlling the cooling speed at 10<2>K to10<5>K/S.

Description

Technical field: [0001] The invention relates to a grid of a valve-controlled sealed lead-acid storage battery, in particular to an alloy material for the positive grid of the storage battery and a preparation method thereof. Background technique: [0002] At present, in order to achieve sealing and maintenance-free requirements for lead-acid batteries, low-antimony alloys and lead-calcium alloys are generally used for positive grids. Both alloys have their own advantages and disadvantages. [0003] The low-antimony alloy grid has a good bonding force with the active material, and the charge-discharge cycle is not easy to deform, but antimony will promote battery dehydration and self-discharge. No matter how much the antimony content in the lead-antimony alloy is reduced, the alloy will not change during the use of the lead-acid battery. The antimony will inevitably dissolve from the surface of the positive grid and transfer to the surface of the negative plate through the s...

Claims

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Application Information

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IPC IPC(8): H01M4/68H01M4/16C22C11/00C22C11/02C22C11/06C22C1/03
CPCY02E60/126Y02E60/10
Inventor 任安福李瑞珍陈红雨胡建强
Owner TIANNENG BATTERY GROUP
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