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Anode alloy material of lead-acid battery of electric vehicle

A technology of lead-acid batteries and alloy materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of troublesome lighting for users, large water decomposition, etc., and achieve the effect of simple formula, small water decomposition, and reduced manufacturing costs

Inactive Publication Date: 2009-12-23
WEIHAI WENLONG BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the lead-acid batteries used in electric vehicles are open-ended tubular batteries, and tubular open-ended lead-acid batteries are the main power source of commercial electric vehicles. They have the characteristics of reliable performance, relatively mature technology, and high safety factor, but the fly in the ointment is , because this battery uses lead-antimony alloy as the alloy of the positive electrode, the water decomposition of the battery is relatively large during charging
Lead-antimony alloys can greatly improve the cycle life of lead-acid batteries. They are widely used in the fields of automobiles, motorcycle starter batteries, forklift deep-cycle batteries, etc., and the technology is mature. became a big trouble

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0012] An electric vehicle lead-acid storage battery cathode alloy material, the preferred composition content (% by weight) of the alloy is: Ca 0.08, Sn 0.85, Al 0.04, Bi 0.02, Ag 0.02-0.08, Cu 0.005-0.02, and the balance is Pb. Use metal Ca, Ag, Cu to dissolve in the alloy in a small amount, so that they precipitate in the solid solution and on the grain boundary line, so that the corrosion product film has better conductivity and reduces the unique anode of ordinary lead-calcium alloy The passivation effect of the corrosion film, but special attention should be paid to the addition of bismuth element in the positive electrode alloy not exceeding 0.02%, to avoid the large-scale formation of lead dioxide film, resulting in the decline of deep cycle performance of the battery. Alloy materials must have a good set of anti-oxidation protection equipment. This lead alloy has low resistivity, good oxidation resistance and corrosion resistance, ideal mechanical strength and creep r...

Embodiment 2

[0014] An electric vehicle lead-acid battery cathode alloy material, the alloy composition content (weight %) is: Ca 0.04, Sn 0.45, Al 0.06, Bi 0.01, Ag 0.02, Cu 0.02, and the balance is Pb. Metals Ca, Ag, and Cu are slightly dissolved in the alloy, so that they are scattered in the solid solution and on the grain boundary, so that the corrosion product film has better conductivity, and the addition of bismuth is 0.01%. Avoid a large amount of lead dioxide film formation, resulting in a decline in battery deep cycle performance. Alloy materials must have a good set of anti-oxidation protection equipment. This lead alloy has low resistivity, good oxidation resistance and corrosion resistance, ideal mechanical strength and creep resistance, high oxygen evolution potential, good self-discharge performance and maintenance-free performance, and excellent life cycle capability , The electrochemical performance is relatively stable, and the antimony in the positive electrode of the ...

Embodiment 3

[0016] An electric vehicle lead-acid battery cathode alloy material, the alloy composition content (weight %) is: Ca 0.12, Sn 1.0, Al 0.02, Bi 0.015, Ag 0.05, Cu 0.005, and the balance is Pb. The metal Ca, Ag, and Cu are slightly dissolved in the alloy, so that they are scattered and precipitated in the solid solution and on the grain boundary, so that the corrosion product film has better conductivity. Alloy materials must have a good set of anti-oxidation protection equipment. This lead alloy has low resistivity, good oxidation resistance and corrosion resistance, ideal mechanical strength and creep resistance, high oxygen evolution potential, good self-discharge performance and maintenance-free performance, and excellent life cycle capability , The electrochemical performance is relatively stable, and the antimony in the positive electrode of the lead-antimony alloy will not transfer to the negative electrode during the cycle, which will increase the reaction and cause wate...

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Abstract

The invention relates to an anode alloy material of lead-acid battery of an electric vehicle. The alloy specifically comprises the following components by weight percent: 0.04-0.12 percent of Ca, 0.45-1.0 percent of Sn, 0.02-0.06 percent of Al, 0.01-0.02 percent of Bi, 0.02-0.08 percent of Ag, 0.005-0.02 percent of Cu and the balance of Pb. The invention has the advantages of simple formulation, little resistance ratio, favorable anti-oxidant and corrosion-resisting performance, higher oxygen evolution potential, favorable self-discharging performance, maintenance-free performance, excellent service circulation ability, more stable electrochemistry performance and little water splitting during charging. By adopting the tubular opening lead-acid battery made from the alloy, distilled water is not needed to be added so as to bring great convenience for users; besides, the production cost and the resource waste are reduced.

Description

technical field [0001] The invention relates to an alloy material, in particular to an alloy material for the positive electrode of an electric vehicle lead-acid storage battery. Background technique [0002] We know that with the rise of energy prices, the reduction of exploitable oil in our country, and the large reliance on imports, the contradiction between the supply and demand of vehicle fuel is becoming more and more prominent, and there is an urgent need to develop convenient, energy-saving, no tail gas emissions, and economical and practical transportation. tool. Electric vehicles are currently a hot topic in this field. In theory, electric vehicles can choose fuel cells, lithium batteries, nickel-metal hydride batteries, lead-acid batteries, etc. as power sources. The advantages of lead-acid batteries are: (1) low cost, in line with popular requirements; (2) large-scale production, relatively mature technology; (3) no exhaust, zero emissions, can reduce environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38C22C11/06
CPCY02E60/12Y02E60/10
Inventor 林海亭李峥仲健陈昌徐宁
Owner WEIHAI WENLONG BATTERY
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