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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

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Problems solved by technology

However, this method of multiple vapor deposition also has problems such as insufficient bonding force between the various layers of aluminum-coated structural layers, and easy delamination, which also affects the performance of the aluminum-coated film to a certain extent.

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

Embodiment 1

[0031] A method for preparing a metallized film for a battery by primary vapor deposition. The base film is attached to a cooling roller 1 and sent into a vacuum vapor deposition chamber. The vacuum vapor deposition chamber is provided with an evaporation mechanism with metal materials (evaporation boats, etc. can be used) , 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 metal vapor, so that the base film is immersed in the metal vapor, that is, the primary evaporation of the metal layer is completed.

[0032] Its structure see figure 1 As shown, the cooling roll 1 includes a roller body with a built-in circulating cooling channel, and micropores 2 are distributed on the surface of the roller body. A gas chamber connected to the micropores 2 is arranged inside the roller body, and the gas chamber is connected to the external gas through th...

Embodiment 2

[0049] 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

[0051] Compared with Example 1, most of them are the same, except that in this example, the base film is also subjected to surface treatment before being sent into 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-coated films obtained in the above-mentioned Examples 1-Example 2 and Comparative Example 1-Comparative Example 3 (one-time vapor deposition to the same thickness, which is about 800nm), and the obtained performance results are shown in Table 1 below. .

[0053] Table 1 The performance of each aluminum-coated film product

[0054]

[0055] 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 or equal to 3N is regarded as an excellent product.

[0056] From the measured data i...

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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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