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Treatment method of improved lithium ion battery aluminum shell

A technology of lithium-ion battery and treatment method, which is applied in the field of treatment of aluminum shells of improved lithium-ion batteries, can solve problems such as Mylar film not being able to protect bare cells, Mylar film over-melting and drawing, affecting battery energy density, etc., to achieve Improve energy density and safety, reduce coating process, and save internal space

Inactive Publication Date: 2020-03-27
TIANNENG SAFT ENERGY JOINT CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Since its invention, lithium-ion batteries have been widely used due to their advantages of high energy density, long service life, light weight and low self-discharge. The internal structure of the battery core mainly includes positive electrodes, separators and negative electrodes. It is coated with a layer of Mylar film on the outside. The Mylar film mainly prevents the diaphragm from being scratched by the aluminum shell and insulates it from the aluminum shell when the bare cell enters the shell. However, the use of the Mylar film has the following disadvantages: 1. The Mylar film is relatively Thick, generally about 0.1mm, takes up a lot of space, affects the energy density of the battery and mainly uses polymer materials such as polypropylene, which has poor thermal conductivity; 2. The thermal melting effect of Mylar film is affected by temperature, pressure and Mylar film material, etc. Due to the influence of various factors, it is easy to cause problems such as Mylar film overmelt drawing and unmelted falling off, so that Mylar film cannot protect the bare cell.

Method used

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  • Treatment method of improved lithium ion battery aluminum shell
  • Treatment method of improved lithium ion battery aluminum shell
  • Treatment method of improved lithium ion battery aluminum shell

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Surface treatment is carried out on the aluminum shell of the battery; among them, the surface treatment can be cleaned by water spray or cleaning solution, high-pressure gas can also be used for cleaning, and ultrasonic cleaning can also be used.

[0037] (2) Carry out the first drying treatment on the surface-treated aluminum battery case; among them, the first drying treatment can be achieved by blowing hot air, so that the remaining water stains on the inner surface of the battery aluminum case can be quickly blown away and other impurities. The aluminum shell of the battery can also be dried in drying equipment such as an oven to achieve a more uniform drying treatment on the inner surface of the aluminum shell of the battery, and to completely remove the water stains remaining on the inner surface of the aluminum shell of the battery. eliminate.

[0038] (3) Ceramic powder and polymer glue are provided, and the ceramic powder and polymer glue are uniformly mi...

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Abstract

The invention provides a treatment method of an improved lithium ion battery aluminum shell, and belongs to the technical field of lithium batteries. The treatment method solves the problems that an existing Mylar film is thick and occupies a large space, and the problems of over-melting wiredrawing, non-melting falling and the like of a Mylar film which are easily caused because the hot melting effect of the Mylar film is influenced by factors such as temperature, pressure and Mylar film material. The treatment method of the improved lithium ion battery aluminum shell comprises the followingsteps: S01, mixing ceramic powder and polymer glue to prepare a ceramic composite coating; S02, coating the inner surface of the battery aluminum shell with the ceramic composite coating; and S03, drying the battery aluminum shell coated with the ceramic composite coating. The invention has the advantages of good thermal conductivity, capability of saving the internal space of the battery and thelike.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a treatment method for an improved lithium ion battery aluminum shell. Background technique [0002] Since its invention, lithium-ion batteries have been widely used due to their advantages of high energy density, long service life, light weight and low self-discharge. The internal structure of the battery core mainly includes positive electrodes, separators and negative electrodes. It is coated with a layer of Mylar film on the outside. The Mylar film mainly prevents the diaphragm from being scratched by the aluminum shell and insulates it from the aluminum shell when the bare cell enters the shell. However, the use of the Mylar film has the following disadvantages: 1. The Mylar film is relatively Thick, generally about 0.1mm, takes up a lot of space, affects the energy density of the battery and mainly uses polymer materials such as polypropylene, which ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36H01M2/02H01M10/0525H01M50/116H01M50/124H01M50/131H01M50/691
CPCH01M10/0525H01M50/131H01M50/116H01M50/124H01M50/691Y02E60/10
Inventor 葛科余志刚谈良伟孙伟李明均
Owner TIANNENG SAFT ENERGY JOINT CO
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