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Lithium ion battery antistatic gluing diaphragm and preparation method thereof, and lithium ion battery

A lithium-ion battery, antistatic technology, applied in the direction of secondary batteries, battery pack components, circuits, etc., can solve the problems of high cost, easy to precipitate, affect the performance of the base film, etc., to alleviate short circuit, ease adsorption, improve stacking The effect of sheet efficiency

Pending Publication Date: 2022-04-22
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the antistatic agent has poor compatibility with the masterbatch and is easy to precipitate, which will affect the performance of the base film, and the cost is high

Method used

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  • Lithium ion battery antistatic gluing diaphragm and preparation method thereof, and lithium ion battery
  • Lithium ion battery antistatic gluing diaphragm and preparation method thereof, and lithium ion battery

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0022] According to a preferred embodiment of the present invention, the antistatic glue layer has a thickness of 1-7 μm, preferably 2-4 μm.

[0023] According to a preferred embodiment of the present invention, when the antistatic coating layer is double-coated, the thickness of the mixed coating layer of the binder and ceramic particles is 0.8-5 μm, preferably 1.5-3 μm; The thickness of the electrostatic agent coating is 0.2-2 μm, preferably 0.5-1 μm.

[0024] According to the present invention, the weight percentage of the antistatic agent in the antistatic glue layer is 1%-20%, preferably 5%-10%.

[0025] The weight percentage of the polymer binder in the antistatic coating layer is 10%-50%, preferably 20%-30%.

[0026] The weight percentage of the ceramic particles in the antistatic glue layer is 50%-90%, preferably 70%-75%.

[0027] Optionally, the antistatic agent includes a cationic antistatic agent and a nonionic antistatic agent.

[0028] The cationic antistatic a...

Embodiment 1

[0048] Add polyvinylidene fluoride, aluminum oxide, and cetyltrimethylammonium chloride to the organic solvent NMP at a mass ratio of 2.5:7:0.5 to make a coating solution, and the coating solution is applied by roller coating It is coated on a polyethylene base film with a thickness of 9 μm to form a separator with an adhesive layer, and the thickness of the adhesive layer is controlled at about 3 μm.

Embodiment 2

[0050] Add polyvinylidene fluoride, aluminum oxide, and ethoxylauramide to the organic solvent NMP at a mass ratio of 2.5:7:0.5 to make a coating solution, and apply the coating solution on the A separator with an adhesive layer is formed on a polyethylene base film with a thickness of 9 μm, and the thickness of the adhesive layer is controlled at about 3 μm.

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Abstract

The invention belongs to the field of secondary batteries, and discloses a lithium ion battery antistatic gluing diaphragm, a preparation method and a lithium ion battery, the diaphragm comprises a diaphragm base material and an antistatic gluing layer coated on the diaphragm base material; and the antistatic gluing layer contains an antistatic agent, a polymer binder and ceramic particles. According to the antistatic glued diaphragm for the lithium ion battery, static electricity can be reduced to be below 200V, short circuit of the diaphragm caused by electrostatic adsorption of dust is effectively relieved, adsorption of the diaphragm with static electricity to equipment passing rollers and a lamination table is relieved, and lamination efficiency is effectively improved; except for an obvious antistatic effect, the antistatic glued diaphragm for the lithium ion battery has no influence on other performances of the battery, and the battery assembled by using the diaphragm can combine a positive electrode, a negative electrode and the diaphragm together through a thermal compounding process, so that the battery keeps certain hardness.

Description

technical field [0001] The invention belongs to the field of secondary batteries, and in particular relates to an antistatic glue-coated diaphragm for a lithium ion battery and a preparation method thereof, and a lithium ion battery. Background technique [0002] Lithium-ion batteries are currently the most popular new energy storage devices. According to the different packaging methods of lithium-ion batteries, they can be divided into soft-pack lithium-ion batteries and metal-case lithium-ion batteries. Among them, soft-pack lithium-ion batteries use aluminum-plastic film as packaging materials. . With the development of battery size towards longer and narrower trends, soft-packed lithium-ion batteries are becoming more and more unfavorable for subsequent group assembly. When the manipulator grabs and translates the battery, the battery is easy to fall and collide, causing safety accidents. Therefore, a special process is required to improve the hardness of the battery. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/457H01M50/489H01M50/434H01M50/414H01M50/403H01M10/0525
CPCH01M50/457H01M50/489H01M50/434H01M50/414H01M50/403H01M10/0525
Inventor 温昕孙小嫚杨道均
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD