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Method for preparing thin thermal battery heating powder piece based on slurry coating method

A technology of thermal battery and heating powder, which is applied to electrodes of primary batteries, electrode manufacturing, etc., can solve the problem that the pole pieces of thermal batteries cannot be thinned, and achieve the effects of low cost, good environmental adaptability and fast activation speed.

Inactive Publication Date: 2015-06-03
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a method for preparing thin thermal battery heating powder based on thermal battery heating powder slurry, which solves the problem that thermal battery pole pieces cannot be thinned in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of uniform slurry of heating powder for thermal battery: under humidity 4 The mixture of 15%, epoxy resin binder 5% and C 7 H 16 80% of the organic dispersant is mixed according to the above ratio, and mechanically stirred at 1500r / min for 30min to obtain a uniform slurry of the heating powder of the heat battery; the above ratios are mass percentages; among them, the Fe powder and KClO 4 In the mixture, the mass percentage of Fe powder is 12%, KClO 4 The mass percentage is 88%.

[0024] Coat the surface-treated graphite paper with a uniform slurry of 50um thick thermal battery heating powder at a speed of 45cm / min, and dry it in a vacuum drying oven at 100°C for 30 minutes; then place the prepared sample at a pressure of 5Mpa Press down for 4 minutes to obtain a thin thermal battery heating powder sheet; the thickness of the heating powder sheet is 25um.

Embodiment 2

[0026] Preparation of uniform slurry of heating powder for thermal battery: In a glove box, combine Fe powder with KClO 4 20% of the mixture, 0.2% of PTFE emulsion binder and C 2 H 6 O organic dispersant 79.8% is mixed according to the proportion, and the speed of 300r / min, magnetic stirring for 24h, the uniform slurry of the heating battery heating powder is obtained; the above proportions are mass percentages; among them, the Fe powder and KClO 4 In the mixture, the mass percentage of Fe powder is 15%, KClO 4 The mass percentage is 85%.

[0027] Then coat the uniform slurry of thermal battery heating powder with a thickness of 100 um on the surface-treated metal foil at a speed of 20 cm / min, and cure it in a vacuum drying oven at 25°C for 24 hours; then, the prepared sample is heated at 15Mpa Press for 30s under pressure to obtain a thin thermal battery heating powder; the thickness of the heating powder is 80um.

Embodiment 3

[0029] Preparation of uniform slurry of heating powder for thermal battery: under humidity 4 Mixture of 80%, polyvinylidene fluoride binder 5% and C 4 H 7 15% of the NO organic dispersant is mixed according to the proportion, and the speed of 1000r / min is mechanically stirred for 2h to obtain a uniform slurry of the heating powder of the heat battery; the above proportions are mass percentages; among them, the Fe powder and KClO 4 In the mixture, the mass percentage of Fe powder is 20%, KClO 4 The mass percentage is 80%.

[0030] Then coat the uniform slurry of thermal battery heating powder with a thickness of 400 um on the glass fiber after surface treatment at a speed of 5cm / min, and cure it in a vacuum drying oven at 60°C for 10 hours; then place the prepared sample at 2Mpa Press under pressure for 5 minutes to obtain a thin thermal battery heating powder sheet; the thickness of the heating powder sheet is 300um.

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Abstract

The invention belongs to the field of battery manufacturing, and in particular relates to a method for preparing a thin thermal battery heating powder piece based on a slurry coating method. The method comprises the following steps: mixing thermal battery heating powder, an adhesive and an organic dispersing agent so as to form uniform slurry, coating the slurry on a conductive substrate, molding, drying, and curing, thereby obtaining the thin thermal battery heating powder piece. Compared with a conventional powder tabletting forming process, the method is relatively low in cost, simple in process and applicable to large-scale industrial product, is innovative in the small-size / thinning field of thermal batteries, and has very high values for promoting development of the national defense industry, the thickness of the thin thermal battery heating powder piece prepared by using the method can be reduced by 1 / 3-1 / 2, and the thickness of the thin thermal battery heating powder piece can be adjusted within dozens of to hundreds of micrometers.

Description

technical field [0001] The invention belongs to the field of battery manufacturing, and in particular relates to a method for preparing thin thermal battery heating powder sheets based on a slurry coating method. Background technique [0002] The thermal battery is a primary reserve battery, which has the advantages of high power, large output current, long storage time and good environmental adaptability. It is the most widely used reserve battery in military equipment and the largest amount of equipment; Preparation of powder tableting process, that is: evenly sprinkle electrode powder material on the conductive substrate, and then apply pressure to shape; due to the poor self-supporting property of the powder, the pole piece cannot be made very thin, and the large diameter pole piece cannot be formed. These have become bottlenecks in the miniaturization of thermal batteries. Therefore, it is of great significance to the national defense industry to study the micro / thin p...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/08
Inventor 邓亚锋兰伟刘波闫军原勇强崔益秀
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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