Lead-calcium alloy for positive grid, and preparation method thereof

A technology of lead-calcium alloy and positive plate, which is applied in the direction of battery electrodes, electrode carriers/current collectors, electrical components, etc., can solve the problems of unspecified influence, easy casting, and unspecified problems, so as to improve anti-corrosion performance, prevent agglomeration, Anti-oxidation effect

Active Publication Date: 2021-03-19
广东奥克莱集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is the closest reference document of the present invention, and the technical problem it solves is easy casting and no pollution in production, and it does not point out the influence of the addition of individual components on the overall formula system
[0004] Chinese patent (CN100355920C) discloses a grid alloy and its preparation method, which specifically discloses that the grid alloy is composed of calcium, aluminum, tin, silver, and lead, and specifically discloses that its components are divided into half by weight: calcium 0.1~0.2, aluminum 0.03~0.05, tin 1.2~2, silver 0.001~0.025, and the balance of lead. Higher and improve the mechanical properties, and the addition of silver improves the mechanical properties and corrosion strength of the alloy. It can be seen that in the above-mentioned patents, the addition of calcium is for the mechanical properties, and the addition of silver improves the mechanical properties and corrosion strength of the alloy. Corrosion strength, which also does not indicate the impact of the addition of individual components on the overall formulation system

Method used

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  • Lead-calcium alloy for positive grid, and preparation method thereof

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Embodiment 1

[0032] A lead-calcium alloy for a positive grid, the lead-calcium alloy is made of the following components in weight percentage: 0.094% calcium, 0.02% aluminum, 1.7% tin, 0.1% bismuth, 0.3% rare earth, and 0.12% modified graphene , and the balance is lead.

[0033] The rare earth is composed of the following components in weight percent: 32% lanthanum, 28% yttrium, 22% neodymium, and 18% cerium.

[0034] The preparation method of described modified graphene is:

[0035] Add 2 parts of carbon nanotubes to 23 parts of concentrated sulfuric acid, and stir at 150 rpm for 120 minutes to obtain a mixed solution;

[0036] Add 4 parts of graphene to 21 parts of deionized water, and evenly disperse to obtain a suspension; add the mixed solution and suspension to a planetary ball mill for ball milling to obtain a mixed slurry, ultrasonically treat the mixed slurry, and dry to obtain modified graphite alkene.

[0037] The rotational speed of the planetary ball mill is 300rpm, and the...

Embodiment 2

[0042] A lead-calcium alloy for a positive grid, the lead-calcium alloy is made of the following components in weight percent: 0.09% calcium, 0.01% aluminum, 1.5% tin, 0.08% bismuth, 0.1% rare earth, and 0.08% modified graphene , and the balance is lead.

[0043] The rare earth is composed of the following components in weight percent: 32% lanthanum, 28% yttrium, 22% neodymium, and 18% cerium.

[0044] The preparation method of described modified graphene is:

[0045] Add 2 parts of carbon nanotubes to 23 parts of concentrated sulfuric acid, and stir at 150 rpm for 120 minutes to obtain a mixed solution;

[0046] Add 4 parts of graphene to 21 parts of deionized water, and evenly disperse to obtain a suspension; add the mixed solution and suspension to a planetary ball mill for ball milling to obtain a mixed slurry, ultrasonically treat the mixed slurry, and dry to obtain modified graphite alkene.

[0047] The rotational speed of the planetary ball mill is 300rpm, and the ba...

Embodiment 3

[0052] A lead-calcium alloy for a positive grid, the lead-calcium alloy is made of the following components in weight percentage: 0.096% calcium, 0.05% aluminum, 2% tin, 0.12% bismuth, 0.4% rare earth, and 0.2% modified graphene , and the balance is lead.

[0053] The rare earth is composed of the following components in weight percent: 32% lanthanum, 28% yttrium, 22% neodymium, and 18% cerium.

[0054] The preparation method of described modified graphene is:

[0055] Add 2 parts of carbon nanotubes to 23 parts of concentrated sulfuric acid, and stir at 150 rpm for 120 minutes to obtain a mixed solution;

[0056] Add 4 parts of graphene to 21 parts of deionized water, and evenly disperse to obtain a suspension; add the mixed solution and suspension to a planetary ball mill for ball milling to obtain a mixed slurry, ultrasonically treat the mixed slurry, and dry to obtain modified graphite alkene.

[0057] The rotational speed of the planetary ball mill is 300rpm, and the b...

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Abstract

The invention discloses a lead-calcium alloy for a positive grid, and a preparation method thereof. The lead-calcium alloy is prepared from the following components: calcium, aluminum, tin, bismuth, rare earth, modified graphene and the balance lead. The lead-calcium alloy for the positive grid is high in corrosion resistance and tensile strength, and the service life of a storage battery can be effectively prolonged; according to the lead-calcium alloy, the content of the calcium in the lead-calcium alloy is controlled to be 0.09%-0.096%, and the anti-corrosion effect can be remarkably improved; when the content of the calcium is 0.094%, the anti-corrosion effect is optimal; when the content of the calcium is higher than 0.096%, in the using process, the growth speed in the length-width direction is increased, the corrosion speed of the alloy is increased, and accordingly the service life of a battery is shortened; when the content of the calcium is lower than 0.09%, the internal crystal structure of the alloy is thickened, and the intercrystalline corrosion speed is increased; and the positive grid can be rotted and broken more quickly in the use process, and consequently the service life of the battery is shortened.

Description

technical field [0001] The invention relates to the technical field of storage batteries, in particular to a lead-calcium alloy for positive grids and a preparation method thereof. Background technique [0002] At present, in the industry, 70-80% of the failure of lead-acid batteries is caused by the corrosion of the positive grid. As the carrier and conductor of the lead paste, the grid is usually made of lead-calcium alloy. The lead paste can only become a pole plate after being filled and dried on the grid, and the pole plate is the core of the lead-acid battery. The grid is like a skeleton. The strength and service life of the entire plate have a direct impact, and the corrosion of the lead-calcium alloy is one of the important factors affecting the service life of the battery. [0003] Chinese patent (103943866A) discloses an alloy grid for storage battery, and specifically discloses that the weight ratio is 0.06%-0.12% calcium, 0.2%-0.6% tin, 0.02%-0.04% aluminum, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/06C22C1/10H01M4/68H01M4/73
CPCC22C1/1036C22C11/06H01M4/685H01M4/73Y02E60/10
Inventor 魏慧献邵双喜
Owner 广东奥克莱集团有限公司
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