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Positive grid alloy of lead-acid battery and manufacturing method of alloy

A technology of lead-acid batteries and positive plates, applied in the direction of electrode carriers/collectors, etc., can solve the problems that it is difficult to meet the requirements of new energy vehicles for battery cycle life, the cycle life of lead-acid batteries is reduced, and the corrosion resistance is poor. It is conducive to deep discharge cycle, overcomes the early capacity fading phenomenon, and increases the effect of hydrogen evolution overpotential

Active Publication Date: 2013-07-10
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its corrosion resistance is poor, especially in the deep cycle process, the surface of the lead-calcium alloy positive electrode grid alloy is very easy to grow a layer of high-resistance anode corrosion layer and severe intergranular corrosion, which reduces the cycle life of lead-acid batteries , it is difficult to meet the requirements of new energy vehicles for battery cycle life

Method used

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  • Positive grid alloy of lead-acid battery and manufacturing method of alloy
  • Positive grid alloy of lead-acid battery and manufacturing method of alloy

Examples

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Embodiment 1

[0022] This embodiment provides a method for preparing a positive electrode grid alloy of a lead-acid battery, comprising the following steps:

[0023] (1) Weigh the electrolytic lead with 80% of the volume of the lead pot, and heat the lead in the lead pot until it melts;

[0024] (2) Heat the lead pot to 600°C, add silver and aluminum to the lead pot in proportion, and stir evenly after the silver and aluminum are melted;

[0025] (3) Cool the lead pot to 440°C, remove the lead slag on the surface of the lead pot, add tin into the lead pot in proportion, stir evenly after the tin is melted, then add calcium in proportion to the lead pot, and melt with calcium Finally, stir evenly to obtain the positive electrode grid alloy of the lead-acid storage battery.

[0026] The lead-acid battery positive grid alloy prepared by the above preparation method includes: lead, calcium, tin, aluminum, silver; wherein, calcium accounts for 0.07% of the total mass of the alloy, tin accounts ...

Embodiment 2

[0029] This embodiment provides a method for preparing a positive electrode grid alloy of a lead-acid battery, comprising the following steps:

[0030] (1) Weigh the electrolytic lead with 80% of the volume of the lead pot, and heat the lead in the lead pot until it melts;

[0031] (2) Heat the lead pot to 650°C, add silver and aluminum to the lead pot in proportion, and stir evenly after the silver and aluminum are melted;

[0032] (3) Cool the lead pot to 420°C, remove the lead slag on the surface of the lead pot, add tin into the lead pot in proportion, stir evenly after the tin is melted, then add calcium in proportion to the lead pot, and melt with calcium Finally, stir evenly to obtain the positive electrode grid alloy of the lead-acid storage battery.

[0033] The lead-acid battery positive grid alloy prepared by the above preparation method includes: lead, calcium, tin, aluminum, silver; wherein, calcium accounts for 0.05% of the total mass of the alloy, tin accounts ...

Embodiment 3

[0035] This embodiment provides a method for preparing a lead-carbon storage battery positive electrode grid alloy, comprising the following steps:

[0036] (1) Weigh the electrolytic lead with 80% of the volume of the lead pot, and heat the lead in the lead pot until it melts;

[0037] (2) Heat the lead pot to 625°C, add silver and aluminum to the lead pot in proportion, and stir evenly after the silver and aluminum are melted;

[0038] (3) Cool the lead pot to 430°C, remove the lead slag on the surface of the lead pot, add tin to the lead pot in proportion, stir evenly after the tin is melted, then add calcium in proportion to the lead pot, and melt with calcium Finally, stir evenly to obtain the positive electrode grid alloy of the lead-carbon storage battery.

[0039] The lead-acid battery positive grid alloy prepared by the above preparation method includes: lead, calcium, tin, aluminum, silver; wherein, calcium accounts for 0.1% of the total mass of the alloy, tin accou...

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Abstract

The invention discloses a positive grid alloy of a lead-acid battery and a manufacturing method of the alloy. The alloy includes lead, calcium, tin, aluminum and silver. The positive grid alloy containing silver of the lead-acid battery is helpful to the reduction of reduction potentials of Pb and PbSO4, thereby enabling Pb2+ to be easily reduced into metal Pb. The silver has an inhibiting effect on the formation of PbO when a constant potential is polarized, the intensity and the creeping strength of the positive grid alloy are improved, and an over-aging effect of the positive grid alloy in a use process is slowed down; and the addition of the sliver can inhibit the increase of a corrosive layer of the positive grid alloy, thereby facilitating the deep discharge cycle of the lead-acid battery, and preventing capacity fading phenomena in the early stage. Meanwhile, through the addition of the sliver, hydrogen evolution overpotentials are enhanced, the separation of hydrogen on a cathode of the alloy is inhibited, the problem of serious water loss of the battery is reduced, and the cycle life of the battery is prolonged. Moreover, the manufacturing process of the alloy is simple.

Description

technical field [0001] The invention belongs to the technical field of storage batteries, and in particular relates to a positive electrode grid alloy of a lead-acid storage battery and a preparation method thereof. Background technique [0002] With the gradual deepening of research and development of new energy vehicles, the requirements for battery performance of vehicles have also been further improved. Lead-acid batteries are widely used in electric vehicles and hybrid vehicles. At present, it is necessary to solve the problem of insufficient cycle life of lead-acid batteries. Traditional lead-acid batteries use Pb-Sb-As-Sn-Se-Cu-S alloy as the positive grid alloy, which is an antimony-containing alloy, which can solve the problem of poor corrosion resistance of the positive grid alloy, making lead-acid The battery has a good deep cycle life, but because the alloy contains a large amount of antimony, a large amount of antimony is easy to migrate to the negative plate d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/68C22C11/10
CPCY02E60/10
Inventor 童庆
Owner CHERY AUTOMOBILE CO LTD
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