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Diaphragm coating device and diaphragm coating method

A technology for coating devices and diaphragms, which is applied to devices, coatings, and electrical components that apply liquid to the surface.

Inactive Publication Date: 2020-08-18
DONGGUAN TAFEL NEW ENERGY TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, none of the above solutions can simultaneously coat multiple coatings in the same equipment

Method used

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  • Diaphragm coating device and diaphragm coating method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment provides a diaphragm coating device, the diaphragm coating device such as figure 1 As shown, it includes a preheating device 2, a first coating device 3, a second coating device 4 (the second coating device 4 also has a back roller 5), a third coating device 6 and a post-treatment Device 7.

[0057] Wherein, the preheating device 2 is a preheating oven, the first coating device 3 is a micro-gravure coating device, the second coating device 4 is an extrusion coating device, and the third coating device 6 is a wire rod coating device, and the post-processing device 7 is a drying oven. In addition, the coating head of the first coating device 3 and the coating head of the second coating device 4 are located on one side of the base film 8, and the coating head of the third coating device 6 is located on the other side of the base film 8.

[0058] The diaphragm coating device also includes a transmission device for transmitting the base film 8 to be processed. T...

Embodiment 2

[0063] This embodiment provides a method for coating a diaphragm using the diaphragm coating device of embodiment 1, which is specifically:

[0064] After the base film 8 (PE film) is preheated at 20°C through the preheating device 2, it passes through the first coating device 3 but does not turn on the first coating device 3 (that is, the first coating device is not used for coating), The adhesive coating (aqueous PVDF layer) is extruded and coated on one side of the base film 8 by the second coating device 4, and the wire rod is coated and bonded on the other side of the base film 8 by the third coating device 6 The coating (aqueous PVDF layer) is then dried by the post-processing device 7 at 20° C. to obtain a separator. Among them, the tension of the coating head region of the second coating device 4 and the third coating device 6 are both 5N.

[0065] The diaphragm of this embodiment has undergone both extrusion coating and wire rod coating, and has a layer of coating on both...

Embodiment 3

[0067] After the base film 8 (PE film) is preheated by the preheating device 2 at 70°C, the first coating device 3 is used for micro-gravure coating of alumina coating, and the second coating device 4 The bond coat (aqueous PVDF layer) is extrusion coated on the coating, passes through the third coating device 6 but does not turn on the third coating device 6 (that is, does not use the third coating device for coating), and then passes through post-processing The device 7 is dried at 70°C to obtain a diaphragm. Among them, the tension of the coating head regions of the first coating device 3 and the second coating device 4 are both 35N.

[0068] The diaphragm of this embodiment has undergone both microgravure coating and extrusion coating, and has two layers of coating on one side of the base film 8.

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Abstract

The invention provides a diaphragm coating device and a diaphragm coating method. The diaphragm coating device comprises a first coating device, a second coating device and a third coating device which are sequentially connected, wherein at least two of the first coating device, the second coating device and the third coating device are different in type; and the first coating device, the second coating device and the third coating device are independently a micro-gravure coating device, an extrusion coating device or a wire rod coating device. The method comprises the following steps of: enabling a base film to sequentially pass through the first coating device, the second coating device and the third coating device, and starting the corresponding coating devices to coat according to needs, thereby obtaining a diaphragm, wherein the number of coating layers is one, two or three. According to the device provided by the invention, three different coating modes can be integrated in the same equipment, so that one or more coatings can be simultaneously coated, the production efficiency of the coating equipment is improved, and the energy consumption of the equipment is reduced.

Description

Technical field [0001] The invention belongs to the technical field of batteries, and relates to a diaphragm coating device and a diaphragm coating method. Background technique [0002] As the latest generation of green high-energy rechargeable batteries, lithium-ion batteries have developed rapidly in the fields of portable electronic products, electric toys, electric vehicles, large-scale power supplies, and energy storage. Separation membrane is one of the four main materials of lithium-ion batteries and plays a key role. There are more and more types of separator coatings for lithium batteries, including heat-resistant coatings, bonding coatings, flame-retardant coatings and adding electrolyte Absorb and other coatings. [0003] The existing lithium battery composite film coating process has the following drawbacks: [0004] The existing coating process generally adopts a single-layer coating drying process or a secondary coating and secondary drying coating process. The coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C1/08B05C9/14B05C11/10B05C13/02B05D1/26B05D1/28B05D3/02H01M2/14H01M2/16H01M10/0525
CPCB05C1/0834B05C9/14B05C11/10B05C13/02B05D1/265B05D1/28B05D3/0218B05D3/0254H01M10/0525H01M50/403H01M50/449Y02E60/10
Inventor 朱建平魏建良刘莎莎叶茂鹏
Owner DONGGUAN TAFEL NEW ENERGY TECH CO LTD
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