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Battery manufacturing process, film tearing method and film tearing device

A membrane device and battery technology, applied in the manufacture, transportation and packaging of electrolyte batteries, non-aqueous electrolyte batteries, etc., can solve the problems of enhanced adhesion between the protective film and the battery cell, damage to the battery core, and degumming in appearance, etc. Excellent tearing rate and easy tearing effect

Pending Publication Date: 2021-11-23
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current initial viscosity of the protective film and the degumming of the tear film are a contradiction, and there are the following two technical problems: 1. The initial adhesion of the protective film is large, which can ensure that the protective film and the battery do not fall off before the chemical formation process. , due to the effect of pressure and temperature, the bonding force between the protective film and the battery cell is significantly enhanced, the film tearing process is more difficult to tear off the film and the adhesive layer remains on the surface of the battery cell, resulting in degummed defective products in appearance
2. The initial adhesion of the protective film is small, which can reduce the proportion of defective products with degumming on the appearance, but the adhesive force between the protective film and the battery cell is not enough before the hot pressing process, which leads to the peeling off of the protective film and the battery cell during the circulation of the battery cell, resulting in battery failure. core damage

Method used

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  • Battery manufacturing process, film tearing method and film tearing device
  • Battery manufacturing process, film tearing method and film tearing device
  • Battery manufacturing process, film tearing method and film tearing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Such as Figure 1 to Figure 5 As shown, the present embodiment provides a film tearing method, and the specific steps are as follows:

[0061] Step 1, such as figure 1 As shown, the storage table 1 fixes the electric core 6 placed on the adsorption plate 11 through the vacuum nozzle, and the heating device 2 and the heating wire 13 of the storage table 1 are respectively bonded to the first surface of the electric core 6 and the heating wire 13 at a heating temperature of 40°. The adhesive force of the second side is that the protective film 7 of 0.2N / 25mm is heated, and its adhesive force is reduced to 0.1N / 25mm;

[0062] Step two, such as figure 2 As shown, the air blowing device 3 uses an air outlet pressure of 0.2 to 0.4 MPa to blow air on the initial side of the protective film 7 for 1 to 3 seconds, and the first clamping device 41 clamps the blown protective film 7;

[0063] Step three, such as image 3 As shown, the first clamping device 41 clamps the protec...

Embodiment 2

[0068] The difference from Example 1 is that the heating temperature of this example is 50°, and the adhesive force of the protective film after heating is 0.086N / 25mm.

[0069] The rest of the steps are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0071] Different from Example 1, the heating temperature of this example is 60°, and the adhesive force of the protective film after heating is 0.067N / 25mm.

[0072] The rest of the steps are the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a battery manufacturing process, a film tearing method and a film tearing device. The film tearing method comprises the following steps that heating is carried out on a protective film with an initial adhesive force of 0.2-0.5 N / 25mm; a blowing device blows air to the starting edge of the protective film to blow up the protective film, and a first clamping device clamps the blown-up protective film; the first clamping device moves to separate the protective film from a first surface of a battery cell; a second clamping device clamps the protective film, and the first clamping device loosens the protective film; and the mechanical arm controls the battery cell to move upwards by a certain distance, the second clamping device moves to separate the protective film from a second surface of the battery cell, and then the protective film is conveyed to a waste box. According to the method, the initial adhesive force of the protective film is set in a specific range, so that the protective film does not fall off in the circulation process, the battery cell is protected from being damaged, and meanwhile, heating is carried out on the protective film before the film is torn, so that the viscosity of the protective film is reduced, the protective film is easier to tear off, and the film tearing rate is improved, and therefore the balance of initial viscosity and film tearing degumming is realized.

Description

[0001] field of invention [0002] The invention belongs to the technical field of lithium ion battery manufacturing, and in particular relates to a battery manufacturing process, a film tearing method and a film tearing device. Background technique [0003] In the manufacturing process of consumer lithium-ion batteries, in order to ensure the appearance quality of the battery, it is necessary to attach a protective film to the surface of the battery cell in the manufacturing process of the battery cell to prevent it from being scratched by human / equipment during the cell circulation process and the battery cell circulation process. The vacuum nozzle of the equipment in the device absorbs / extrudes the surface of the battery cell. [0004] The current initial viscosity of the protective film and the degumming of the tear film are a contradiction, and there are the following two technical problems: 1. The initial adhesion of the protective film is large, which can ensure that th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65B69/00H01M10/058
CPCB65B69/0066B65B69/00H01M10/058Y02P70/50Y02E60/10
Inventor 洪春林纪荣进李聪陈贤锐郑明清陈杰杨山
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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