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Lithium battery diaphragm compound device and compound method thereof

A lithium battery diaphragm and composite device technology, which is applied in lamination devices, chemical instruments and methods, and layered products, can solve the problems of low bonding strength of the diaphragm and poor composite effect, and achieve continuous and stable transportation. Improve quality and efficiency, composite better effect

Inactive Publication Date: 2014-04-30
成都芝田高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the bonding strength of the existing roll-pressed composite lithium battery separator is not high and the composite effect is not good. The present invention provides a lithium battery separator composite device and a composite method thereof. The film passes through the unwinding device and the preheating roller, hot pressing roller, heat setting roller, cooling roller and winding device of the rolling device respectively, which can well realize the uniform rolling and compounding of three-layer or multi-layer films, and the pressing roller passes through The hydraulic device controls the rolling pressure of the three-layer or multi-layer film, which can provide greater pressure for the compounding of the three-layer or multi-layer film to ensure that the bonding strength between the films is large enough

Method used

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  • Lithium battery diaphragm compound device and compound method thereof
  • Lithium battery diaphragm compound device and compound method thereof

Examples

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Effect test

Embodiment 1

[0048] The single-layer PP and PE films are unwound by three unwinding rollers 4, and the unwinding rollers 4 control the tension of the film through the servo motor 9. There are three sets of unwinding guide rollers 13 behind the unwinding rollers, which are used to unwind the lithium battery. The diaphragm is guided to the rolling device 2, the direction guide roller 5 is used to change the introduction angle of the film, and the three-layer film is rewound together to form a PP / PE / PP three-layer diaphragm, wherein the PE film is located between the two layers of PP film middle;

[0049] The three-layer PP / PE / PP separator is rolled and laminated through a rolling device. The rolling device 2 includes a preheating roller 21, a hot pressing roller 22, a heat setting roller 23 and a cooling roller 24, and all rollers are connected with a drive motor through a universal joint 20 and driven by a reduction motor. The three-layer PP / PE / PP diaphragm is uniformly preheated by the pr...

Embodiment 2

[0052] The single-layer PP and PE films are unwound through the unwinding roller 4, which controls the tension of the film through the servo motor 9, and there are three sets of unwinding guide rollers 13 behind the unwinding roller, which are used to guide the lithium battery diaphragm To the rolling device 2, the direction guide roller 5 is used to change the introduction angle of the film, and rewind the three-layer film together to form a PP / PE / PP three-layer diaphragm, wherein the PE film is located in the middle of the two-layer PP film;

[0053] The three-layer PP / PE / PP separator is rolled and laminated through a rolling device. The rolling device 2 includes a preheating roller 21, a hot pressing roller 22, a heat setting roller 23 and a cooling roller 24, and all rollers are connected with a drive motor through a universal joint 20 and driven by a reduction motor. The three-layer PP / PE / PP diaphragm is uniformly preheated by the preheating roller 21 in sequence, and the...

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Abstract

The invention discloses a lithium battery diaphragm compound device and a compound method thereof. The device comprises an unwinding device, a rolling device and a winding device, wherein the unwinding device comprises at least two unwinding rollers, an unwinding guide roller and a direction guide roller; the unwinding guide roller is used for guiding a lithium battery diaphragm to the rolling device; the direction guide roller is used for changing the diaphragm guide direction; the rolling device comprises a preheating roller, a hot pressing roller, a heat setting roller and a cooling roller; the preheating roller, the hot pressing roller, the heat setting roller and the cooling roller are orderly arranged in parallel; the preheating roller, the hot pressing roller, the heat setting roller and the cooling roller are arranged inside the rolling device of the device, so that uniform rolling and compounding of a plurality of layers of films can be well achieved, the adhesion between the films can be enhanced, and the compound effect is better.

Description

technical field [0001] The invention relates to the field of lithium battery diaphragm compounding, in particular to a lithium battery diaphragm compounding device and a compounding method thereof. Background technique [0002] Lithium-ion batteries have the characteristics of high specific energy, long cycle life, no memory effect, safety, reliability, and fast charging and discharging. Therefore, they have become a hot spot in the research of new power supply technologies in recent years. In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle times and safety performance of the battery. Therefore, it is very important to obtain a separator with excellent performance. The main function of the separator is to separate the positive and negative poles of the battery, prevent short circuit cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/10B32B37/06
Inventor 丁治天周燕颜婧谌星伊赵波唐良武
Owner 成都芝田高分子材料有限公司
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