Method for preparing negative grid of lead storage battery

A lead-acid battery and negative plate technology, which is applied in the field of electrode material preparation, can solve the problems of high preparation cost, high technical requirements and high preparation cost of rare earth metals, and achieves the advantages of adjustable micro-domain structure, safe and reliable process, and convenient operation and control. Effect

Active Publication Date: 2010-09-15
JIANGSU HUAFU STORAGE NEW TECH DEV +1
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AI Technical Summary

Problems solved by technology

[0023] 1. Difficulties in the preparation of rare earth metals: rare earth metals are prepared by using rare earth reductions or rare earth salts as raw materials, and are produced by molten electrolysis. The technical requirements for the preparation of rare earth metals by molten electrolytic reduction are high, and the preparation cost of rare earth metals is high;
[0024] 2. Difficulties in the preparation of rare earth lead alloys: Because of the large difference in the physical properties (especially melting point and density) of rare earth element metals and lead, using traditional alloy melting casting technology, it is difficult to add rare earth elements and the composition of rare earth lead alloys is uneven after adding It is necessary to develop a new solution treatment technology to solve the difficult problems of adding rare earth elements and uneven alloy composition after adding;
[0025] 3. It is difficult to use on a large scale: because the preparation cost of rare earth metals and rare earth lead (Pb-Re) alloys is high, by adding rare earth elements to lead alloys, the method of improving the comprehensive performance of battery lead alloys leads to rare earths being modified The production cost of lead or lead alloy is extremely high, and it is difficult to use it on a large scale

Method used

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  • Method for preparing negative grid of lead storage battery
  • Method for preparing negative grid of lead storage battery

Examples

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Effect test

Embodiment 1

[0053] 1. Preparation of lead-antimony (Pb-Sb) alloy negative electrode grid: first add a certain amount of lead and one-third of the mass of antimony (broken into pieces in advance) in a lead melting pot, and melt at 330-400 ° C. Then raise the temperature to 500-550°C, wait until the solid phase is completely melted, stir evenly, remove the scum, take it out of the pot, and cast it into a lead-antimony (Pb-Sb) alloy containing 25% antimony. When the lead-antimony (Pb-Sb) alloy is used as the raw material to melt and cast the grid, a certain amount of high-antimony grid alloy is added with lead and melted to form a lead-antimony (Pb-Sb) alloy with a specified antimony content to obtain lead-antimony (Pb-Sb) alloy negative grid;

[0054] 2. Electrochemical surface modification of the lead alloy negative electrode grid: the lead-antimony (Pb-Sb) alloy negative electrode grid obtained in the above step is used as the cathode, and the lead-antimony (Pb-Sb) alloy is used as the an...

Embodiment 2

[0057] 1. Preparation of lead-calcium (Pb-Ca) alloy negative electrode grid: Divide the calcium into several parts, wrap them in paper, put them into small stainless steel baskets with long handles, extend to the bottom of the lead pot and stir until the calcium melts. The reaction of calcium and lead to form a grid alloy is accompanied by obvious sound and light, that is, a lead-calcium (Pb-Ca) grid alloy with a high calcium content is obtained, and the lead-calcium (Pb-Ca) grid alloy is melted and casted as a raw material Made lead-calcium (Pb-Ca) alloy negative electrode grid;

[0058] 2. Electrochemical surface modification of the lead alloy negative electrode grid: the lead-calcium (Pb-Ca) alloy negative electrode grid obtained in the above step is used as the cathode, and the lead-calcium (Pb-Ca) alloy is used as the anode, at 0.06mol / LSm 2 (SO 4 ) 3 and 4.0mol / L H 2 SO 4 In aqueous solution, the operating temperature is 40°C, and the apparent operating current densi...

Embodiment 3

[0061] 1. Preparation of lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy negative electrode grid: first heat and melt lead in a lead-melting pot, the temperature does not exceed 550°C, then add tin (Sn) and aluminum in sequence Melt (Al) at 550°C and stir well; divide calcium (Ca) into several parts, wrap them in paper, put them in small stainless steel baskets with long handles, and extend to the bottom of the lead pot to stir until the calcium melts. The reaction of calcium and lead to form a grid alloy is accompanied by distinct sound and light. Melting and casting lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy negative grid with lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy as raw material;

[0062] 2. Electrochemical surface modification of lead alloy negative electrode grid: the lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy negative electrode grid obtained in the above step is used as the cathode, and the lead-calcium-tin-aluminum (Pb-Ca -Sn-Al) alloy as the anode, at 0.10...

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Abstract

The invention discloses a method for preparing a negative grid of a lead storage battery, which belongs to the technical field of electrode material preparation. In the method, a lead alloy is used as a raw material, a negative grid formed by pouring molten lead alloy serves as a cathode, a cathodic electrochemical reduction technology is used to perform surface modification in aqueous solution of a rare earth sulfate and sulfuric acid, rare earth is used to improve the performance of the surface of the lead alloy negative grid, and thus, the lead storage battery negative grid with a rare earth-modified lead alloy surface is formed. The method avoids the difficulty in the preparation of a rare earth-lead (Pb-Re) alloy, can dope some trace rare earth elements on the surface of an electrodeeasily, uniformly and quantitatively and realize the adjustment of the surface performance of the electrode. The preparation of a rare earth oxide by an electrochemical method has the advantages of ensuring the high purity of the prepared rare earth oxide, making the domain structure of the rare earth oxide adjustable, along with mild operation conditions, simple operation, low preparation cost and the like, and thus, conditions are provided for process industrialization. In the invention, the preparation method is simple, the preparation is convenient and the process is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials, in particular to a method for preparing negative grids of lead storage batteries. Background technique [0002] The working principle of lead-acid batteries is to use electrochemical principles to achieve material and energy conversion. The interface reaction characteristics of electrodes and electrolytes are the core and essence of battery performance. Therefore, for lead-acid batteries, the development of functional electrodes, the use of electrolytes with excellent performance, and the matching optimization of electrodes and electrolytes are extremely important key issues in the development of new lead-acid batteries. [0003] The basic components and materials that make up the lead-acid battery include: positive plate, negative plate, sulfuric acid solution (that is, electrolyte or commonly known as electro-hydraulic), separator, battery tank (including liquid injec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/73
CPCY02E60/12Y02E60/10
Inventor 许文林居春山王雅琼周寿斌崔耀星顾立贞张淮浩朱明海姚干兵
Owner JIANGSU HUAFU STORAGE NEW TECH DEV
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