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Long-service-life deep-cycle positive grid alloy and preparation method thereof

A positive plate and long-life technology, which is applied in the field of long-life deep-cycle lead-acid battery positive grid alloy and its preparation, can solve the problems of lead-acid battery early capacity decay, poor corrosion resistance of alloys, poor conductivity of corrosion film, etc. , to achieve the effect of avoiding a large amount of burning loss, good corrosion resistance and improving corrosion resistance

Active Publication Date: 2014-10-01
ZHEJIANG TIANNENG BATTERY JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is found that the corrosion film formed by calcium has poor conductivity, and calcium also reduces the corrosion resistance of the alloy, and the antimony-free effect produced is easy to cause early capacity decay and premature termination of life in lead-acid batteries.
Therefore, lead-calcium-tin-aluminum alloy was bred, but it was found that the life span was reduced by nearly 1 / 3 compared with that of lead-antimony-cadmium alloy batteries. After research, it was found that the grains of conventional lead-calcium-tin-aluminum alloys are coarse, which is easy to cause intergranular corrosion. The overall corrosion resistance of the alloy is poor, which is the main factor for the premature end of battery life

Method used

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  • Long-service-life deep-cycle positive grid alloy and preparation method thereof
  • Long-service-life deep-cycle positive grid alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] A method for preparing a low-temperature deep-cycle positive electrode grid alloy, characterized in that it comprises the following steps:

[0027] (1) Raw material preparation: lead, calcium, tin and aluminum, and the mass percentage of each raw material in the total raw material is: calcium: 0.09%, tin: 0.2%, aluminum: 0.05%, zinc: 0.02%, silver: 0.01%, Lead is the balance;

[0028] (2) Add lead grains accounting for 85% of the total mass of lead raw materials into the graphite lead melting pot of the intermediate frequency furnace and heat to 670~680 °C to fully melt the lead grains. Use lead skins accounting for 0.5% of the total mass of lead raw materials to wrap and mix evenly Calcium shavings and broken aluminum flakes, and press them into the molten lead liquid together, and then stir for 2~3 minutes to mix the calcium and aluminum elements in the lead liquid evenly. During this process, keep the temperature of the melt at 670~680 Between ℃;

[0029] (3) Stop ...

Embodiment 2

[0033] A method for preparing a low-temperature deep-cycle positive electrode grid alloy, characterized in that it comprises the following steps:

[0034] (1) Raw material preparation: lead, calcium, tin and aluminum, and the mass percentage of each raw material in the total raw material is: calcium: 0.09%, tin: 0.18%, aluminum: 0.05%, zinc: 0.08%, silver: 0.05%, Lead is the balance;

[0035] (2) Add lead particles accounting for 85% of the total mass of lead raw materials into an intermediate frequency furnace and heat to 670~680°C to fully melt the lead particles. Use lead skins accounting for 0.5% of the total mass of lead raw materials to wrap evenly mixed calcium chips and Crushed aluminum pieces, and press them into the molten lead liquid together, and then stir for 2~3 minutes to mix the calcium and aluminum elements in the lead liquid evenly. During this process, keep the temperature of the melt between 670~680°C;

[0036] (3) Stop stirring and heating, add the remain...

Embodiment 3

[0040] A method for preparing a low-temperature deep-cycle positive electrode grid alloy, characterized in that it comprises the following steps:

[0041] (1) Raw material preparation: lead, calcium, tin and aluminum, and the mass percentage of each raw material in the total raw material is: calcium: 0.09%, tin: 0.2%, aluminum: 0.05%, zinc: 0.15%, silver: 0.15%, Lead is the balance;

[0042] (2) Add lead grains accounting for 80-85% of the total mass of lead raw materials into an intermediate frequency furnace and heat to 670-680°C to fully melt the lead grains. Wrap the evenly mixed calcium chips and broken aluminum pieces with lead skin, and put them together It is pressed into the molten lead liquid, and then stirred for 2-3 minutes to mix the calcium-aluminum element evenly in the lead liquid. During this process, the temperature of the melt is kept between 670-680 °C;

[0043] (3) Stop stirring and heating, add the remaining lead particles, and stir the melt. When the te...

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Abstract

The invention discloses a long-service-life deep-cycle lead-acid battery positive grid alloy which is composed of the following raw materials in percentage by mass: 0.05-0.12% of calcium, 0.1-2.0% of tin, 0.01-0.1% of aluminum, 0.01-0.2% of zinc, 0.01-0.2% of silver and the balance of lead. The alloy has favorable corrosion resistance, and does not influence the deep cycle performance of the battery. The addition of the zinc can well enhance the deep cycle performance and low-temperature properties of the battery. The addition of the silver can enhance the corrosion resistance of the grid alloy; and the comparison between Figure 1 and Figure 2 indicates that the silver can be enriched at the grain sub-boundary and grain boundary along with the tin, and the silver enriched at the grain boundary can enhance the corrosion resistance of the grain boundary, thereby prolonging the service life of the alloy grid.

Description

[0001] technical field [0002] The invention belongs to the field of lead-acid batteries, and relates to a long-life deep-cycle lead-acid battery positive electrode grid alloy and a preparation method thereof. Background technique [0003] The grid is an important part of the lead-acid battery. Although it does not directly increase the capacity, it plays the role of supporting the skeleton of the active material and conducting and evenly distributing the current during the charging and discharging process of the battery. These performances directly limit The capacity and cycle life of the battery, and whether these properties are superior mainly depends on the alloy used for the grid. [0004] The grid material of traditional lead-acid batteries is mainly lead-antimony-cadmium alloy. The castability and mechanical properties of this alloy can meet the needs of battery production and use, and the corrosion layer formed by it has good conductivity, which can basically inhi...

Claims

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Application Information

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IPC IPC(8): C22C11/00C22C11/06C22C1/02
Inventor 王晶陈飞赵冬冬周燕方明学杨惠强
Owner ZHEJIANG TIANNENG BATTERY JIANGSU
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