Preparation method of coated thermal battery composite electrode sheet

A composite electrode and thermal battery technology, applied in the electrodes of primary batteries, equipment for manufacturing primary batteries, battery electrodes, etc., can solve the problems of poor powder support, difficult electrode sheet preparation, and low electrode sheet forming rate, etc. Improve toughness and strength, prevent diaphragm melt overflow, and achieve precise and controllable thickness

Active Publication Date: 2019-08-09
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, except for the negative electrode LiB alloy sheet, the domestic thermal battery electrode sheets are prepared by the powder pressing process, that is, the positive electrode powder material is evenly placed in the mold, and then pressed into shape. Due to the poor support of the powder, this method It is difficult to make the electrode sheet very thin, even if it is made, the forming rate of the electrode sheet is very low

Method used

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  • Preparation method of coated thermal battery composite electrode sheet
  • Preparation method of coated thermal battery composite electrode sheet
  • Preparation method of coated thermal battery composite electrode sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A method for preparing a coated thermal battery composite electrode sheet, comprising the following steps:

[0041] (1) Preparation of the positive electrode sheet layer: after laying the conductive substrate on the working table of the battery coating machine, lay a layer of fiber mesh on the conductive substrate, and then adjust the height A of the coater scraper according to the thickness of the positive electrode sheet. , place the positive electrode sheet slurry to be coated on the surface of the conductive substrate, then turn on the coating machine to start coating, and place it in a drying oven to dry after coating to obtain the positive electrode sheet;

[0042] The conductive substrate is a graphite sheet; the porosity of the fiber web is 85%, and the fiber web is embedded in the positive electrode sheet; the height A of the scraper is adjusted to 0.02mm; the fiber web is carbon fiber felt;

[0043] (2) Prepare the positive electrode-diaphragm sheet: place the...

Embodiment 2

[0050] A method for preparing a coated thermal battery composite electrode sheet, comprising the following steps:

[0051] (1) Preparation of the positive electrode sheet layer: after laying the conductive substrate on the working table of the battery coating machine, lay a layer of fiber mesh on the conductive substrate, and then adjust the height A of the coater scraper according to the thickness of the positive electrode sheet. , place the positive electrode sheet slurry to be coated on the surface of the conductive substrate, then turn on the coating machine to start coating, and place it in a drying oven to dry after coating to obtain the positive electrode sheet;

[0052] The conductive substrate is iron foil; the porosity of the fiber web is 99%, and the fiber web is embedded in the positive sheet; the height A of the scraper is adjusted to 2mm; the fiber web is iron or copper metal fiber felt;

[0053] (2) Prepare the positive electrode-diaphragm sheet: place the posi...

Embodiment 3

[0060] A method for preparing a coated thermal battery composite electrode sheet, comprising the following steps:

[0061] (1) Preparation of the positive electrode sheet layer: after laying the conductive substrate on the working table of the battery coating machine, lay a layer of fiber mesh on the conductive substrate, and then adjust the height A of the coater scraper according to the thickness of the positive electrode sheet. , place the positive electrode sheet slurry to be coated on the surface of the conductive substrate, then turn on the coating machine to start coating, and place it in a drying oven to dry after coating to obtain the positive electrode sheet;

[0062] The conductive substrate is copper foil; the porosity of the fiber web is 86%, and the fiber web is embedded in the positive electrode sheet; the height A of the scraper is adjusted to 0.2mm; the fiber web is beryllium oxide ceramic fiber felt;

[0063] (2) Prepare the positive electrode-diaphragm shee...

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Abstract

The invention discloses a preparation method of a coated thermal battery composite electrode sheet. The composite electrode sheet is composed of a heating layer, a positive electrode layer and a separator layer. For the preparation method, firstly, a layer of fiber mesh is laid on a conductive substrate, a positive electrode layer is then coated, after drying, an asbestos mesh is placed on a surface of the positive electrode layer; secondly, the separator layer is then coated on the positive electrode layer on which the asbestos mesh is placed, after the separator layer is dried, the heating layer is coated on the other side of the conductive substrate to obtain a composite sheet; and thirdly, high temperature resistant waterproof conductive adhesive is coated on both sides of the composite sheet, after drying, the composite positive electrode layer is obtained. The composite electrode sheet is advantaged in that thickness of the composite electrode sheet can be adjusted according to height of a scraper in the preparation process, so the thickness of the composite electrode sheet is precisely controlled, the composite electrode sheet is combined with a thermal battery negative electrode LiB sheet with controllable thickness to form an ultra-thin thermal battery cell, the obtained composite electrode sheet has a function of preventing moisture absorption and preventing a diaphragm from being melted and overflowing, and the preparation method has advantages of high chip rate and simple process and meets requirements of engineering use.

Description

technical field [0001] The invention belongs to the technical field of thermal battery electrode sheets, and in particular relates to a preparation method of a coated thermal battery composite electrode sheet. Background technique [0002] Thermal battery thermal battery, also known as heat activated reserve battery (heat activated reserve battery). When stored at room temperature, the electrolyte is a non-conductive solid. When in use, an electric ignition head or a firing pin mechanism is used to ignite the heating agent inside, so that the electrolyte melts into an ion conductor and is activated as a reserve battery. When stored at room temperature, the electrolyte As a non-conductive solid, the primary battery works by heating and melting the electrolyte through a pyrotechnic system. The storage time is theoretically unlimited, and the actual measurable value is more than 17 years. Due to its small internal resistance, wide operating temperature range, long storage time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/36H01M6/00H01M4/08H01M4/04
CPCH01M4/0409H01M4/08H01M6/005H01M6/36
Inventor 孟剑李云伟陈铤潘志鹏王京亮万伟华段其智
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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