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Preparation method of metal plated film for battery

A metal plating and battery technology, applied in battery electrodes, metal material coating processes, circuits, etc., can solve the problems of wrinkling and deformation of the base film, affecting the film quality, etc., to avoid film curling, ensure evaporation quality, and improve Combine the effect of the effect

Inactive Publication Date: 2020-04-17
浙江长宇新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the aluminum-coated layer of this specification thickness is evaporated once, the base film is required to stay in the high-temperature vacuum evaporation chamber for a long time during evaporation, which will easily cause the base film to wrinkle and deform due to high temperature, which will seriously affect film quality

Method used

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  • Preparation method of metal plated film for battery
  • Preparation method of metal plated film for battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a metallized film for a battery, comprising the following steps:

[0031] (1) After taking the base film and carrying out surface treatment on its surface, the first metal layer is deposited on the surface of the base film through a vacuum evaporation chamber filled with metal vapor;

[0032] (2) After treating the base film with the metal layer evaporated, continue to pass through the vacuum evaporation chamber to evaporate the next layer of metal layer;

[0033] (3) According to step (2), cyclically vapor-deposit several layers of metal layers on the base film, so that the thickness of all metal layers meets the set requirements, and the process is completed.

[0034] In step (1), the method of surface treatment of the base film is corona treatment, electric spark treatment, plasma treatment, Ni plating treatment, Al plating 2 o 3 Treatment, chemical treatment coating or NaOH immersion treatment in one or more combination (corona treatment is ...

Embodiment 2

[0055] Compared with Example 1, most of them are the same, except that in this example, the relative humidity is controlled to be 60%.

Embodiment 3

[0057] Compared with Example 1, most of them are the same, except that in this example, the oxygen flow will be sprayed on the lower surface of the base film, and the mixed gas of oxygen and argon (the volume ratio of the two is 1:4) will be used instead. plasma treatment.

[0058] At the same time, the bonding strength of the aluminized films prepared in the above-mentioned Examples 1-Example 3 and Comparative Example 1-Comparative Example 5 was tested, and the obtained performance results are shown in Table 1 below.

[0059] Table 1 Properties of various aluminized films

[0060]

[0061]

[0062] Note: Downstream manufacturers require that the bonding strength of the metal layer of the aluminized film product be ≥ 2N. Generally, 2N is regarded as a qualified product for delivery, and a product greater than 3N is regarded as an excellent product.

[0063] From the measured data in Table 1 above, it can be seen that the bonding strength between the metal layers is grea...

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Abstract

The invention relates to a preparation method of a metal plated film for a battery. The preparation method comprises the following steps that (1) a base film is taken, surface treatment is carried outon the surface of the base film, and a first metal layer is evaporated on the surface of the base film in a vacuum evaporation chamber filled with metal steam; (2) after the base film evaporated withthe metal layer is treated, the base film is evaporated with the next metal layer in the vacuum evaporation chamber continuously; and (3) a plurality of metal layers are circularly evaporated on thebase film according to the step (2), so that the thicknesses of all the metal layers meet the set requirements, therefore the process is completed. Compared with the prior art, the preparation methodof the metal plated film for the battery realizes the high-performance coating of thick metal on the base film by adopting a mode of evaporating the metal layer for multiple times, and the film is good in overall performance, long in service life and the like.

Description

technical field [0001] The invention belongs to the technical field of metal-plated battery film materials, and relates to a method for preparing a metal-plated film for batteries. Background technique [0002] At present, the cathode fluid of lithium-ion batteries usually uses aluminum foil as a carrier. However, this structural arrangement using aluminum foil as a carrier is lacking in terms of energy density and safety. Therefore, in order to solve the above problems, a new alternative is to use metallized film for batteries instead of aluminum foil. This evaporated film for batteries is coated with aluminum on both sides of the polymer film, which can reduce weight and volume. , to increase the energy density. At the same time, in terms of safety, polymer plastic film is used as an intermediate. When a high-temperature short circuit occurs, the metal film can be fused to form an open circuit, which greatly improves the safety of the battery. [0003] Therefore, the per...

Claims

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Application Information

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IPC IPC(8): C23C14/56C23C14/02C23C14/20C23C14/24H01M4/66
CPCC23C14/02C23C14/20C23C14/24C23C14/562C23C14/564H01M4/661Y02E60/10
Inventor 吴明忠曾祥平吴林海
Owner 浙江长宇新材料股份有限公司
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