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A kind of conductive paint for battery case, its preparation method and application

A technology for conductive coatings and battery shells, applied in conductive coatings, battery box/sleeve materials, dry batteries, etc., can solve the problems of poor bonding, large self-discharge, and decline in battery electrical performance, and achieve increased conductivity and tight contact. , the effect of increasing adhesion

Active Publication Date: 2022-06-07
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above three published patent documents all have the same problems. Whether it is a conductive agent or a conductive paint, when applied to an alkaline manganese battery, the conductivity is average, and after long-term storage, it is combined with the steel shell in the alkaline electrolyte. Worse, does not stop the diffusion of steel-cased iron
Unable to meet the current demand for a 10-year shelf life in the market
[0007] At present, the conductive agent used in domestic alkaline-manganese batteries is still a general-purpose conductive agent, and the use in alkaline-manganese batteries has the following disadvantages: 1) The coating film resistance of this conductive agent is large, generally greater than 300Ω / film length 5.0cm×width 1.5cm× The thickness is 60μm, and some are as high as several KΩ / film length 5.0cm×width 1.5cm×thickness 60μm. Alkaline-manganese batteries made with it have large internal resistance and low current value for high-power discharge; 2) the coating of this conductive agent The adhesion between the film and the steel shell is generally a physical adhesion, and the adhesion is insufficient, resulting in a large internal resistance of the battery and a low current value for high-power discharge. In addition, the alkaline manganese battery made with this conductive agent has a large self-discharge capacity. It will cause the electrical performance of the battery to decline too quickly during storage

Method used

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  • A kind of conductive paint for battery case, its preparation method and application
  • A kind of conductive paint for battery case, its preparation method and application
  • A kind of conductive paint for battery case, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] This embodiment provides a conductive paint for a battery case, the conductive paint is composed of a water-based emulsion and a conductive functional material, wherein the water-based emulsion accounts for 84.8% by weight, and the conductive functional material accounts for 15.2% by weight;

[0082] The water-based emulsion comprises the following components by weight:

[0083]

[0084] Wherein, the coupling agent is a silane coupling agent, the wetting agent is sodium alkyl sulfate, and the emulsifier is Tween 80.

[0085] The conductive functional material includes the following components by weight:

[0086]

[0087]

[0088] The conductive paint for battery case provided in this embodiment is obtained by the following preparation method:

[0089] (1) Add the formula amount of polytetrafluoroethylene resin, sodium alkyl sulfate, Tween 80, silane coupling agent and water into a high-speed stirring tank with a dispersing disc and stirring rod with a volume o...

Embodiment 2

[0096] This embodiment provides a conductive paint for a battery case, the conductive paint is composed of an aqueous emulsion and a conductive functional material, wherein the weight of the aqueous emulsion is 73%, and the weight of the conductive functional material is 27%;

[0097] The aqueous emulsion comprises the following components by weight:

[0098]

[0099] The coupling agent is a titanate coupling agent, the wetting agent is an aqueous polysiloxane wetting agent, and the emulsifier is sodium n-hexadecyl-n-ethylmorpholinoethyl sulfate.

[0100] The conductive functional material includes the following components by weight:

[0101]

[0102] The conductive paint for battery case provided in this embodiment is obtained by the following preparation method:

[0103] (1) Add the formula amount of polyvinylidene fluoride resin, aqueous polysiloxane wetting agent, sodium n-hexadecyl-n-ethylmorpholinyl ethyl sulfate, titanate coupling agent and water to the volume In ...

Embodiment 3

[0110] The present embodiment provides a conductive paint for a battery case, the conductive paint is composed of a water-based emulsion and a conductive functional material, wherein the water-based emulsion accounts for 64% by weight, and the conductive functional material accounts for 36% by weight;

[0111] The water-based emulsion comprises the following components by weight:

[0112]

[0113]

[0114] The coupling agent is a silane coupling agent, the wetting agent is an aqueous acetylene glycol wetting agent, and the emulsifier is polyoxyethylene monostearate.

[0115] The conductive functional material includes the following components by weight:

[0116]

[0117] The conductive paint for battery case provided in this embodiment is obtained by the following preparation method:

[0118] (1) Add the formula amount of polyperfluoroethylene propylene resin, water-based acetylene glycol wetting agent, polyoxyethylene monostearate, silane coupling agent and water to...

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Abstract

The invention provides a conductive coating for a battery case, its preparation method and application. The conductive coating includes an aqueous emulsion and a conductive functional material; the aqueous emulsion includes a resin, a coupling agent and an emulsifier. In the present invention, the use of a new type of conductive coating can not only increase the contact area between the battery shell and the positive electrode ring, increase the current collection effect and conductivity, but also effectively reduce the diffusion of metal elements in the battery shell that are not conducive to the battery during long-term storage, and improve the alkali resistance. The long-term storage performance of the manganese battery greatly reduces the leakage rate of the battery after long-term storage.

Description

technical field [0001] The invention belongs to the technical field of alkaline manganese batteries, and relates to a conductive paint for battery shells, a preparation method and uses thereof. Background technique [0002] As the alkaline manganese battery continues to be welcomed by the market as an environment-friendly and inexpensive commodity for daily use, the current market application is broad and the development prospect is good. In recent years, with technological progress and changes in market demand, alkaline manganese batteries require high power discharge and long storage life. The storage life of alkaline manganese batteries in market demand is generally greater than 5 years, and a long shelf life of 10 years is pursued. In the production process of alkaline manganese batteries, the steel shell is used as the container shell and as the current collector of the positive electrode ring (active material manganese dioxide), and the electrical conductivity in conta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/18C09D127/16C09D5/24C09D7/20C09D7/63C09D7/80H01M50/545H01M50/562H01M50/124H01M6/08
CPCC09D127/18C09D127/16C09D5/24C09D7/20C09D7/63C09D7/80H01M6/08C08K2201/001C08K2201/014C08K2201/011C08K2003/0862C08L2205/02C08K13/02C08K5/54C08K3/042C08K3/04C08K3/041C08K3/08C08K3/00C08K5/10Y02E60/10
Inventor 刘军平
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD