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Metal foil, preparation method thereof, battery cell packaging method and battery module

A battery module and battery cell packaging technology, which is applied in the field of metal foil and battery modules, can solve the problems of inability to improve the sealing and safety of battery cells, and achieve easy mass production, high electrolyte resistance, and high viscosity. The effect of knot force

Pending Publication Date: 2020-06-26
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, none of the above solutions can improve the sealing and safety of the battery core while improving the hardness of the battery core.

Method used

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  • Metal foil, preparation method thereof, battery cell packaging method and battery module
  • Metal foil, preparation method thereof, battery cell packaging method and battery module
  • Metal foil, preparation method thereof, battery cell packaging method and battery module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] This embodiment provides a metal foil, the structure diagram of the metal foil is as follows figure 1 , including a base metal material 1, an adhesive layer 3 on the base metal material, and a heat-sealing material layer 2 on the adhesive. The base metal material 1 is steel foil; the adhesive layer 3 is composed of an adhesive, the adhesive is maleic acid-modified polypropylene, and the heat-sealing material of the heat-sealing material layer 2 is polypropylene (PP).

[0068] In the metal foil provided in this embodiment, the thickness of the adhesive layer 3 is 3 μm, and the thickness of the heat-sealing material layer is 65 μm. On the metal foil provided by the present invention, a blank with a width of 6mm is left on the edge (that is, the adhesive layer 3 and the heat-sealing material layer 2 are not included), and the base metal material 1 is provided with a gap with a size of 7mm (there is no gap on the gap). Contains an adhesive layer 3 and a heat-sealing materi...

Embodiment 2

[0077] This embodiment provides a metal foil. The structure of the metal foil refers to Embodiment 1, except that the adhesive is maleic acid-modified polypropylene. The thickness of the adhesive layer 3 is 1 μm, and the thickness of the heat-sealing material layer is 60 μm. On the metal foil provided by the present invention, there is a blank space with a width of 3mm on the edge (that is, without the adhesive layer 3 and the heat-sealing material layer 2), and the base metal material 1 is provided with a gap with a size of 3mm (there is no gap on the gap). Contains an adhesive layer 3 and a heat-sealing material layer 2).

[0078] This embodiment also provides a method of using the metal foil provided by this embodiment for cell packaging, specifically:

[0079] (1) Punch the metal foil provided in this embodiment, take one piece of the metal foil that has been punched and compound it with another piece of the metal foil that has not been punched, and place the battery cell...

Embodiment 3

[0083] This embodiment provides a metal foil. The structure of the metal foil refers to Embodiment 1, except that the adhesive is maleic acid-modified polypropylene. The thickness of the adhesive layer 3 is 5 μm, and the thickness of the heat-sealing material layer is 70 μm. On the metal foil provided by the present invention, there is a blank with a width of 10mm on the edge (that is, without the adhesive layer 3 and the heat-sealing material layer 2), and the base metal material 1 is provided with a gap with a size of 10mm (there is no gap on the gap). Contains an adhesive layer 3 and a heat-sealing material layer 2).

[0084] This embodiment also provides a method of using the metal foil provided by this embodiment for cell packaging, specifically:

[0085] (1) Punch the metal foil provided in this example, take 2 pieces of the metal foil that have been punched and combine them up and down, place the battery cell in the pit body of the 2 pieces of the metal foil that have ...

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Abstract

The invention provides a metal foil, a preparation method thereof, a battery cell packaging method and a battery module. The metal foil comprises a matrix metal material, an adhesive layer located onthe matrix metal material, and a heat-sealing material layer located on the adhesive layer. The packaging method comprises the following steps: (1) punching a pit in the metal foil, putting a batterycell into the pit of the metal foil, and carrying out hot-pressing packaging on the metal foil to obtain a hot-pressed packaged battery cell; and (2) carrying out welding packaging on the hot-pressedpackaged battery cell to obtain a packaged battery cell. The metal foil provided by the invention solves the problem that packaging can be carried out only by forming a welding structure on the edge of a foil material and the sealing performance is not strong due to the fact that only a matrix metal material is used as the foil material in the prior art. The heat-sealing material layer can form aheat-sealing layer during packaging, so that the sealing performance of the battery cell is improved, and the safety performance of the battery cell is improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a metal foil, a preparation method thereof, a battery cell packaging method and a battery module. Background technique [0002] With the continuous depletion of traditional fossil fuels such as coal, oil, and natural gas, and the serious harm to the natural environment and human health caused by the combustion of traditional fossil fuels, lithium has the advantages of high specific energy, long cycle life, no memory benefit, and environmental protection. Ion batteries have become a research hotspot in recent years and have been widely used. Cylindrical lithium-ion batteries have been better applied in electric vehicles due to their advantages of high degree of automation, mature technology, and good consistency. With the rapid development of society, the industry has higher and higher requirements for the rate charge and discharge performance of lithium-ion batteries. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/08H01M10/0525H01M10/058
CPCH01M10/058H01M10/0525H01M2220/20H01M50/116H01M50/124H01M50/183Y02E60/10Y02P70/50
Inventor 陈婷婷何巍侯桃丽刘金成陈校军杨威威邹虹群
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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