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Preparation method of chemical battery pole piece

A technology of chemical batteries and manufacturing methods, which is applied in the direction of electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of difficult precise control of pressure, uneven force on the baseband, high material requirements, etc., and achieve good uniformity, easy force, and volume small effect

Inactive Publication Date: 2010-10-20
HUNAN CORUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems existing in the prior art, such as uneven stress on the base belt, difficult precise control of pressure, high requirements on materials, inconvenient maintenance, cold rolls, etc. caused by the use of traditional vertical roller presses, and provides a new A preparation method for chemical battery pole pieces, this method can precisely control the pressure of the roller press, and the prepared pole pieces have good consistency

Method used

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  • Preparation method of chemical battery pole piece
  • Preparation method of chemical battery pole piece
  • Preparation method of chemical battery pole piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of a chemical battery, comprising the steps of gluing 1, powdering 2, rolling 3, etc., first brushing slurry on a foamed nickel-based tape with a thickness of 0.95 mm, the slurry is made of 1 kg of water, bonding 0.35 kg of polytetrafluoroethylene as an agent and 0.05 kg of nickel powder as a conductive agent (if a certain concentration of polytetrafluoroethylene emulsion is used, the amount of water can be reduced accordingly), and then the active material and additives are powdered by the powder box. Brush the mixed powder into the base belt coated with slurry, and immediately enter the hydraulic horizontal roller machine for rolling. The top view of the horizontal rolling machine is as follows figure 1 As shown, it is composed of bearing 4, roller body 5, hydraulic motor 6, hydraulic cylinder 8, oil pipe 7, oil pump 9, etc. The diameter of the roller of the horizontal roller machine is φ800mm, and the tabletting parameters are as follows:

[0024...

Embodiment 2

[0027] First, the slurry is brushed on a foamed nickel-based belt with a thickness of 0.95 mm. The slurry is mixed with 1 kg of a mixed solvent of N-methylpyrrolidone and ethanol in any proportion, polyvinyl alcohol and polyvinylidene fluoride in any proportion to form a viscous material. 0.02 kg of contact powder, nickel powder and carbon powder are mixed in any proportion to form 0.1 kg of conductive agent mixed powder, and then the mixed powder of active substance and additive is rolled and pressed on the base tape coated with slurry through powder feeding box On the surface, spray one layer of the above-mentioned slurry on its surface, and immediately enter the hydraulic horizontal roller machine for rolling, and the result is the same as that of Example 1.

Embodiment 3

[0029] First, on the foamed nickel base belt with a thickness of 0.95mm, fill and press the powdery mixture composed of active substances and additives on the battery base belt by spraying; spray a paste-like material on the surface of the mixture, and in the paste-like material It contains a solvent and an adhesive, wherein the solvent is water and ethanol, the adhesive is polyvinyl alcohol, and the weight ratio of the solvent to the adhesive is 1:0.003. Immediately enter the hydraulic horizontal pair of rollers for rolling, and the result is the same as in Example 1.

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Abstract

The invention relates to a preparation method of a chemical battery pole piece, which comprises the following steps that: a roll press in production comprises a bearing, a roll body and a driving device, wherein the roll body is a pair of symmetrical rollers, the rollers are placed at left and right and in parallel, and the central axes of the two rollers are positioned on the same horizontal surface. The preparation method of the invention solves the problem of duslting of a traditional press in a traditional process and simultaneously solves the problem of roll cooling due to the temperature reduction of a baseband caused by that the baseband can enter the roll press a certain period of time after powdering. The invention has broad industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of a chemical battery pole piece. Background technique [0002] Chemical batteries generally adopt the following sheeting method: first, the mixture of active materials and various additives is adhered or filled on the base tape, and the base tape after dressing is rolled by a pair of rollers to obtain a formed pole piece. The pole piece rolling forming process affects the uniformity of the pole piece, which in turn affects the performance of the battery, so high requirements are put forward for the rolling machine. The rollers of the traditional vertical roller press are placed vertically. When placed vertically, there are the following problems: First: due to the characteristics of the equipment itself, the gravity of the upper roller will act on the base belt, which will cause uneven force on the base belt. , the pressure is difficult to control accurately, the material requirements are high, and mainte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/62
CPCY02E60/10
Inventor 钟发平何策衡陈风
Owner HUNAN CORUN NEW ENERGY CO LTD
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