Primary evaporation preparation method of plated metal film for battery

A metal plating and battery technology, applied in battery pack parts, metal material coating process, circuit and other directions, can solve the problems that affect the performance of the aluminized film, the bonding force of the aluminized structural layer is not strong enough, and the delamination is prone to occur. Achieve the effect of improving the bonding effect, ensuring uniform cooling effect, and simple overall structure

Pending Publication Date: 2020-03-06
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

However, this method of multiple vapor deposition also has problems such as insufficient bonding force between the various layers of alum

Method used

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  • Primary evaporation preparation method of plated metal film for battery
  • Primary evaporation preparation method of plated metal film for battery
  • Primary evaporation preparation method of plated metal film for battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1:

[0031] A method for preparing a metal-plated film for a battery by one-time evaporation. The base film is attached to the cooling roller 1 and sent into a vacuum evaporation chamber. The vacuum evaporation chamber is equipped with an evaporation mechanism (evaporation boats, etc.) where metal materials are placed. When the vacuum degree in the vacuum evaporation chamber reaches the set threshold requirement, the metal material is heated and melted and evaporated in the evaporation mechanism to form a metal vapor, so that the base film is immersed in the metal vapor, which completes the first evaporation of the metal layer.

[0032] Its structure see figure 1 As shown, the cooling roll 1 includes a roll body with a built-in circulating cooling channel, and micropores 2 are also distributed on the surface of the roll body. The inside of the roll body is provided with a gas chamber communicating with the micropores 2, and the gas chamber is connected to the outside ...

Example Embodiment

[0048] Example 2

[0049] Compared with Embodiment 1, most of them are the same, except that in this embodiment, the relative humidity is controlled to 60%.

Example Embodiment

[0050] Example 3

[0051] Compared with Example 1, most of them are the same, except that in this example, the base film is subjected to surface treatment before being sent to the vacuum evaporation chamber, and the surface treatment method is preferably corona treatment.

[0052] At the same time, the bonding strength test was carried out on the aluminum-plated film (evaporated to the same thickness at one time to the same thickness, which is about 800nm) prepared in the above-mentioned Example 1-Example 2, and Comparative Example 1-Comparative Example 3. The performance results obtained are shown in Table 1 below .

[0053] Table 1 Performance of each aluminized film product

[0054]

[0055] Note: Downstream manufacturers require that the bonding strength of the metal layer of aluminized film products is ≥2N. Generally, 2N is delivered as qualified products, and 3N or more is regarded as excellent products.

[0056] From the measured data in Table 1 above, it can be seen that by arr...

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Abstract

The invention relates to a primary evaporation preparation method of a plated metal film for a battery. A base film is taken to be attached to a cooling roller and fed into a vacuum evaporation chamber; an evaporation mechanism containing metal materials is arranged in the vacuum evaporation chamber, after the vacuum degree in the vacuum evaporation chamber meets the set threshold requirement, themetal materials are heated and melted and evaporated in the evaporation mechanism to form metal steam, the base film is immersed in the metal steam and primary evaporation of the metal layer is completed. Compared with the methods in the prior art, the micropores capable of discharging trace air flow are formed in the surface of the cooling roller so that the heat transfer cooling effect betweenthe cooling roller and the base film is greatly improved, wrinkles are not generated and primary evaporation film formation on the base film is conveniently realized.

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 a battery by primary vapor deposition. 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. ...

Claims

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Application Information

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IPC IPC(8): H01M2/02C23C14/20C23C14/24C23C14/54
CPCC23C14/20C23C14/24C23C14/541H01M50/124Y02E60/10
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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