Accumulator and its preparing method

A technology for accumulators and battery shells, which is applied in secondary battery manufacturing, electrode manufacturing, active material electrodes, etc., can solve the problems of complex mesh structure and complex battery plate manufacturing method, and achieves simple preparation method and good fast charge-discharge performance. , the effect of low internal resistance

Inactive Publication Date: 2006-01-18
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weak point of this invention is: the network structure of tree root in pole plate is complicated, and the manufacturing method of this battery pole plate is complicated

Method used

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  • Accumulator and its preparing method
  • Accumulator and its preparing method
  • Accumulator and its preparing method

Examples

Experimental program
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Effect test

preparation example Construction

[0041] In the preparation method of storage battery of the present invention, the preparation of positive and negative plates comprises the following steps:

[0042] (1) Coating active material on both sides of positive and negative plate metal substrates, drying;

[0043] (2) embedding the metal mesh on one side of at least one of the positive plate or negative plate obtained by step (1);

[0044] (3) Rolling and cutting the polar plate.

[0045] Wherein, the drying conditions may be drying in an oven or a vertical dryer, and the temperature is preferably 80-140°C, more preferably 100-120°C. Embedding the metal mesh into the side of the plate can be achieved by rolling.

Embodiment 1

[0048] Preparation of the positive electrode: Spherical nickel hydroxide, cobaltous oxide, a small amount of additives and binders, and water are stirred in a certain proportion to form a paste slurry, and the slurry is filled with a surface density of 430g / m 2 1. One side is welded in the foamed nickel with nickel strip-shaped drainage terminal, and then after drying, a metal mesh with the same size as the side area of ​​the foamed nickel is rolled on one side of the pole piece. The thickness of the metal mesh is 0.25mm, and the aperture is It is 2.0×4.0mm, and the mesh rate is about 88% nickel cable-stayed mesh. Finally, a positive electrode plate with a size of 85mm×40mm×0.65mm was obtained by rolling and cutting, wherein the embedded depth of the metal mesh was 0.20mm.

[0049]Preparation of negative electrode: Weigh alloy powder, binder, and additives, mix them in a certain proportion, stir them into a paste, coat them on a punched nickel-plated steel strip, dry, roll, an...

Embodiment 2

[0052] Preparation of the positive electrode: except that there is no rolled metal mesh, the rest is the same as the positive electrode plate in Example 1.

[0053] Preparation of the negative electrode: Weigh the alloy powder, binder, and additives, mix them in a certain proportion, stir them into a paste, coat them on the perforated nickel-plated steel strip, dry them, and roll the metal mesh on the negative electrode side. Adopt the nickel cable-stayed mesh identical with embodiment one specification. The size of the nickel cable-stayed mesh used is the same as the side area of ​​the perforated nickel-plated steel strip of the negative electrode, and it is cut into a negative plate with a size of 115mm×40.7mm×0.34mm, wherein the embedded depth of the metal mesh is 0.15mm.

[0054] Battery assembly: the same as in Embodiment 1.

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Abstract

This invention relates to an accumulator, comprising the following steps: joining the positive plate, baffle plate, negative plate and electrolytic solution in the cell housing, wherein, the positive and negative plates is formed by coating active material on both sides of the metallic base, and one lateral side of at least one of the positive and negative plates is located with metallic net embedded in the lateral side of the plate. The invention has the advantages of simple structure of accumulator plate, lower essential resistance, higher discharge capacity and simple preparing method.

Description

【Technical field】 [0001] The invention relates to a storage battery and a preparation method thereof, more specifically to a conductive electrode plate of the storage battery and a preparation method of the conductive electrode plate of the storage battery. 【Background technique】 [0002] With the advancement of science and technology, the application of batteries is becoming more and more extensive, and people have higher and higher requirements for the performance of batteries, such as higher capacity of batteries, fast charging and discharging, etc. [0003] In order to increase the battery capacity, metal foam materials (such as nickel foam, copper foam, nickel felt, etc.) are generally used as the conductive matrix of the capacity-limiting electrode of the battery. In the production process of these electrodes, in order to make the active material in the pole piece more compact, the pole piece is usually rolled several times to increase the packing density of the active...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M4/74H01M4/66H01M4/02H01M4/04
CPCY02E60/10Y02P70/50
Inventor 周文会
Owner SHANGHAI BYD
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