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A long-life deep cycle positive electrode grid alloy and its preparation method

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

Active Publication Date: 2016-02-10
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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  • A long-life deep cycle positive electrode grid alloy and its preparation method
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Examples

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Embodiment 1

[0025] A method for preparing deep-cycle positive grid alloy for low temperature, which is characterized by comprising the following steps:

[0026] (1) Preparation of raw materials: lead, calcium, tin and aluminum, and the mass percentages of each raw material in the total raw materials are: calcium: 0.09%, tin: 0.2%, aluminum: 0.05%, zinc: 0.02%, silver: 0.01%, Lead is the balance;

[0027] (2) Put 85% of the total mass of lead raw materials into the graphite melting pot of the intermediate frequency furnace and heat the lead particles to 670~680℃ to fully melt the lead particles. Use 0.5% of the total mass of lead raw materials to wrap and mix evenly. Calcium scraps and broken aluminum flakes, and press them into the molten lead together, and then stir for 2~3min to make the calcium and aluminum elements in the lead liquid evenly mixed. During this process, keep the melt temperature at 670~680 Between ℃;

[0028] (3) Stop stirring and heating, add the remaining lead pellets, and...

Embodiment 2

[0032] A method for preparing deep-cycle positive grid alloy for low temperature, which is characterized by comprising the following steps:

[0033] (1) Preparation of raw materials: lead, calcium, tin and aluminum, and the mass percentages of each raw material in the total raw materials are: calcium: 0.09%, tin: 0.18%, aluminum: 0.05%, zinc: 0.08%, silver: 0.05%, Lead is the balance;

[0034] (2) Put 85% of the total mass of lead raw materials into the intermediate frequency furnace and heat to 670~680℃ to fully melt the lead particles. Use 0.5% of the total mass of lead raw materials to wrap the mixed calcium chips and Crush the aluminum flakes and press them into the molten lead solution together, and then stir for 2~3min to mix the calcium and aluminum elements in the lead solution evenly. During this process, keep the melt temperature between 670~680℃;

[0035] (3) Stop stirring and heating, add the remaining lead pellets, and stir the melt. When the temperature drops to 520~54...

Embodiment 3

[0039] A method for preparing deep-cycle positive grid alloy for low temperature, which is characterized by comprising the following steps:

[0040] (1) Preparation of raw materials: lead, calcium, tin and aluminum, and the mass percentages of each raw material in the total raw materials are: calcium: 0.09%, tin: 0.2%, aluminum: 0.05%, zinc: 0.15%, silver: 0.15%, Lead is the balance;

[0041] (2) Add 80~85% of the total mass of lead raw materials to lead pellets in an intermediate frequency furnace and heat to 670~680°C to fully melt the lead pellets, wrap the mixed calcium and aluminum flakes with lead skins, and combine them It is pressed into the molten lead liquid, and then stirred for 2~3min to mix the calcium and aluminum elements in the lead liquid evenly. During this process, keep the temperature of the melt between 670~680℃;

[0042] (3) Stop stirring and heating, add the remaining lead pellets, and stir the melt. When the temperature drops to 520~540℃, add tin, zinc and si...

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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

Technical field [0001] The invention belongs to the field of lead-acid batteries, and relates to a long-life deep-cycle lead-acid battery positive grid alloy and a preparation method thereof. Background technique [0002] The grid is an important part of the lead-acid battery. Although it does not directly improve the capacity, it plays a role as a skeleton support for the active material and conducts and evenly distributes the current during the charging and discharging of the battery. These properties directly limit The battery capacity and cycle life, and whether these properties are superior mainly depends on the alloy used in the grid. [0003] The grid material of traditional lead-acid batteries is mainly lead-antimony-cadmium alloy. The casting performance and mechanical properties of this alloy can meet the needs of battery production and use, and the corrosion layer formed by it has good electrical conductivity, which can basically inhibit the PCL phenomenon . However, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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