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Multi-element alloy of positive electrode plate grid for lead accumulator and preparation method of multi-element alloy

A lead storage battery and multi-alloy technology, applied in the field of electrochemistry, can solve problems such as the end of battery life, and achieve the effects of reducing corrosion resistance, prolonging service life, and improving mechanical strength

Inactive Publication Date: 2014-09-24
SHUANGDENG GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in the application field of hybrid electric vehicles, lead-calcium-tin alloy is used as the positive electrode grid material of lead storage battery in the power field, which can overcome the defect of dehydration and drying caused by the use of lead-antimony alloy. However, under high temperature conditions, the calcium alloy positive electrode grid The creep and swelling caused by the accelerated corrosion of the

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  • Multi-element alloy of positive electrode plate grid for lead accumulator and preparation method of multi-element alloy
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Embodiment Construction

[0015] Since metallic calcium is easily oxidized in the air, the invention adopts a vacuum melting method to manufacture. The manufacturing process is divided into two steps. The first step is to make lead, calcium, tin, and barium master alloys in a vacuum melting furnace; the second step is to dilute the master alloys into actual alloys in a lead melting furnace.

[0016] Master alloy production: add each component to a special vacuum container in proportion, turn on the vacuum pump, and after extracting air from the container, close the air extraction port, then heat the mixture to a eutectic state, mix well, and obtain a master alloy after cooling.

[0017] Actual alloy production: Weigh lead, tin and master alloy according to the actual alloy content. Firstly, lead and tin are eutecticed uniformly at a temperature above 450°C, then the master alloy is added at a temperature of about 500°C, and after stirring uniformly, the actual alloy of the cast grid is obtained, that is, th...

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Abstract

The invention provides a multi-element alloy of a positive electrode plate grid for a lead accumulator and a preparation method of the multi-element alloy and relates to the field of electrochemical techniques. The multi-element alloy comprises the following components in percentage by weight: 0.01%-0.1% of Ca, 0.2%-2.0% of Sn, 0.01%-2% of Ba and the balance of lead. The preparation method of the multi-element alloy comprises the following steps: firstly preparing master alloys containing same components, subsequently diluting the master alloys by using lead and tin, and preparing the master alloys into actual alloy. The multi-element alloy can be used for preparing the positive electrode plate grid of the lead accumulator, is good in corrosion resistance and creep resistance, capable of remarkably improving the performance of the accumulator and prolonging the service life of the accumulator and specially suitable for electric vehicles. The preparation method of the multi-element alloy is normative to operate, reasonable in technique and capable of guaranteeing the quality of products.

Description

Technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a multi-element alloy of the positive grid of a lead storage battery and a method for manufacturing the alloy. Background technique [0002] The lead-acid battery is composed of positive grid, active material, negative grid, electrolyte solution, diaphragm, and battery casing. Since the positive grid is in a high anodic corrosion potential area when the battery is charged, the positive grid ribs are prone to anodic corrosion and fracture in the electrolyte solution, which will seriously shorten the battery’s service life. Therefore, the grid’s corrosion resistance, Creep resistance and swelling performance have a crucial impact on battery life. [0003] At present, in the application field of hybrid electric vehicles, lead-calcium-tin alloy as the positive grid material of lead battery in the power field can overcome the defects of dehydration and drying caused by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/00C22C1/03
Inventor 张云霞楼志强孙中五杨鹏
Owner SHUANGDENG GRP