Conducting resin binder and preparation method thereof, pouch cell tab connecting method

A technology for the preparation of binders and soft-packed batteries, applied in the direction of conductive adhesives, adhesives, adhesive types, etc., can solve problems such as welding penetration or weak welding, hidden dangers of battery safety, and reduced production efficiency, and achieve a high price. The effect of low cost, reducing safety hazards and improving production efficiency

Inactive Publication Date: 2018-09-14
SHENZHEN RUILONG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this welding method is used for sheet production, if the welding power setting is inaccurate, there may be welding through or insecure w

Method used

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  • Conducting resin binder and preparation method thereof, pouch cell tab connecting method
  • Conducting resin binder and preparation method thereof, pouch cell tab connecting method
  • Conducting resin binder and preparation method thereof, pouch cell tab connecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a method for preparing a conductive adhesive, the method comprising the following steps:

[0029] S1, preparing graphite oxide, mixing sodium nitrate powder and concentrated sulfuric acid in a container at a mass to volume ratio of 1:100, for example, dissolving 1 g of sodium nitrate in 100 mL of concentrated sulfuric acid, wherein sodium nitrate is analytically pure with a purity greater than 99.8% , the concentration of concentrated sulfuric acid is 95wt%, stir until the sodium nitrate is completely dissolved, place the container containing the solution in an ice-water bath lower than 4°C, when the temperature of the solution is lower than 4°C, slowly add the same mass of sodium nitrate Graphite powder and potassium permanganate powder, keep the solution temperature lower than 4°C during the feeding process, react for 4h, transfer the reacted solution with the container to a warm water bath at 35°C and maintain it for 0.5h, and transfer to the ...

Embodiment 2

[0033] S1, preparing graphite oxide, mixing sodium nitrate powder and concentrated sulfuric acid in a container at a mass to volume ratio of 1:100, for example, dissolving 1 g of sodium nitrate in 100 mL of concentrated sulfuric acid, wherein sodium nitrate is analytically pure with a purity greater than 99.8% , the concentration of concentrated sulfuric acid is 96.5wt%, stir until the sodium nitrate is completely dissolved, put the container containing the solution in an ice-water bath lower than 4°C, when the temperature of the solution is lower than 4°C, slowly add the same mass of sodium nitrate Graphite powder and potassium permanganate powder, keep the solution temperature below 4°C during the feeding process, react for 5h, transfer the reacted solution with the container to a warm water bath at 40°C and maintain it for 0.75h, and transfer it to the warm water bath Add warm water at 45°C whose volume is twice that of concentrated sulfuric acid, and keep the temperature of...

Embodiment 3

[0037] S1, preparing graphite oxide, mixing sodium nitrate powder and concentrated sulfuric acid in a container at a mass to volume ratio of 1:100, for example, dissolving 1 g of sodium nitrate in 100 mL of concentrated sulfuric acid, wherein sodium nitrate is analytically pure with a purity greater than 99.8% , the concentration of concentrated sulfuric acid is 98wt%, stir until the sodium nitrate is completely dissolved, place the container containing the solution in an ice-water bath lower than 4°C, when the temperature of the solution is lower than 4°C, slowly add the same mass of sodium nitrate Graphite powder and potassium permanganate powder, keep the solution temperature below 4°C during the feeding process, react for 6 hours, transfer the reacted solution to a warm water bath at 45°C with the container and maintain it for 1 hour, and add to the solution in the warm water bath Add warm water at 50°C that is twice the volume of concentrated sulfuric acid, and keep the te...

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PUM

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Abstract

The invention relates to a conducting resin binder and a preparation method thereof, a pouch cell tab connecting method. The preparation method comprises the following steps: firstly preparing graphite oxide, a silver nanoparticles/graphene composite material, and preparing the conducting resin binder, finally coating a first calibration area of a pouch cell tab by a layer of the above conductingresin binder, and enabling the tab coated by the conducting resin binder to be adhered to a pouch cell pole piece. The provided technical scheme is capable of avoiding a weld penetration or unstable weld phenomenon occurring between the pouch cell tab and the pole piece, improving the production efficiency, and reducing potential safety hazards.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a conductive adhesive, a preparation method thereof, and a method for connecting tabs of soft pack batteries. Background technique [0002] The production process of lithium-ion pouch batteries includes a sheet-making process, that is, the tabs (external terminals) of the pouch battery and the positive and negative electrodes (collectors) are welded together by laser or ultrasonic waves. When this welding method is used for sheet production, if the welding power is not set accurately, there may be welding through or insecure welding between the tab and the pole piece, which will reduce production efficiency and cause damage to the battery during use. Security risks. Contents of the invention [0003] In order to avoid the phenomenon of welding through or weak welding between the lugs and pole pieces of pouch batteries, improve production efficiency, and reduce po...

Claims

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Application Information

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IPC IPC(8): C09J163/00C09J9/02C09J11/06H01M2/26H01M50/531
CPCC09J9/02C09J11/06C09J163/00C08K9/02C08K2003/0806C08K2201/011C08K3/042H01M50/531Y02E60/10
Inventor 刘超梁东建龚龙君韦水凌
Owner SHENZHEN RUILONG NEW ENERGY TECH
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