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Lithium ion battery pole sheet making method and lithium ion battery pole sheet surface treatment device

A technology for surface treatment devices and lithium-ion batteries, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as floating powder, improve cycle life, reduce short-circuit and micro-short-circuit rates of batteries, and improve comprehensive electrochemical performance. Effect

Inactive Publication Date: 2013-06-05
湖南三迅新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution improves the binding force through the improvement of the binder and meets the coating requirements of the active material. However, in large-scale production, there will still be more floating powder, and there are safety problems in the process of charging and discharging the battery. Still need to use external electronic circuits for charging and discharging protection

Method used

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  • Lithium ion battery pole sheet making method and lithium ion battery pole sheet surface treatment device
  • Lithium ion battery pole sheet making method and lithium ion battery pole sheet surface treatment device
  • Lithium ion battery pole sheet making method and lithium ion battery pole sheet surface treatment device

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preparation example Construction

[0037] Such as figure 1 Shown is the process flow of the preparation method of the lithium ion battery pole piece of the present invention, including:

[0038] 1) In frame 1 is the pole piece coating and cutting process, which is followed by pole piece coating, pole piece rolling, pole piece slitting, and pole piece winding;

[0039] 2) In frame 3 is the pole piece surface treatment process, which is followed by pole piece unwinding, deviation correction, pole piece soaking chute, surface squeegee, drying tunnel, pair of rollers, pole piece winding, and the coated and slitting The latter pole piece is immersed in a water-soluble polymer treatment solution and then dried to form a polymer film (ie, polymer film) on the surface of the pole piece, soaked in the pole piece soaking trough, and dried in a drying tunnel;

[0040] The water-soluble polymer treatment solution includes water and water-soluble polymer compounds. The water-soluble polymer compounds are gelatin, carboxymethyl cel...

Embodiment 1

[0048] The method for preparing a pole piece of a lithium ion battery in a specific embodiment includes: 1) a pole piece coating and cutting process; 2) a pole piece surface treatment process; 3) a sheet production and packaging process.

[0049] The pole piece surface treatment procedures are successively pole piece unwinding, correction, soaking, squeegee, drying, rolling, and winding. The surface treatment device of the lithium ion battery pole piece of the present invention in the specific embodiment is used, which depends on the release The reel 4, the correction guide wheel 17, the pole piece soaking trough 5, the doctor blade 6, the drying tunnel 7, the roller counter 8 and the take-up wheel 9 are realized. The pole piece soaking trough 5 contains a water-soluble polymer treatment liquid 19, which is soaked in the pole piece soaking trough 5, and drying is performed in the drying tunnel 7.

[0050] Preparation of water-soluble polymer treatment solution: stir and mix deioniz...

Embodiment 2

[0053] The method for preparing a pole piece of a lithium ion battery in a specific embodiment includes: 1) a pole piece coating and cutting process; 2) a pole piece surface treatment process; 3) a sheet production and packaging process.

[0054] The pole piece surface treatment procedures are successively pole piece unwinding, correction, soaking, squeegee, drying, rolling, and winding. The surface treatment device of the lithium ion battery pole piece of the present invention in the specific embodiment is used, which depends on the release The reel 4, the correction guide wheel 17, the pole piece soaking trough 5, the doctor blade 6, the drying tunnel 7, the roller counter 8 and the take-up wheel 9 are realized. The pole piece soaking trough 5 contains a water-soluble polymer treatment liquid 19, which is soaked in the pole piece soaking trough 5, and drying is performed in the drying tunnel 7.

[0055] Preparation of water-soluble polymer treatment solution: Stir and mix deioniz...

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Abstract

The invention discloses a lithium ion battery pole sheet making method. The method comprises: a pole sheet coating slitting operation; a pole sheet surface treatment operation comprising a step of immersing a coat-slitted pole sheet in an aqueous high-polymer treatment liquid, and a step of drying to obtain a high-polymer film on the surface of the pole sheet; and a made sheet packaging operation. The method which allows the pole sheet surface treatment operation to be increased and the high-polymer film to be formed on the surface of the pole sheet can effectively prevent the powder fall of the lithium ion battery pole sheet, reduce the floatation powder generated in the making process of a battery, improve the bonding force of active substances, and improve the comprehensive electrochemical performances of the lithium ion battery. The invention also discloses a surface treatment device of the lithium ion battery pole sheet. The device comprises, sequentially arranged, an unreeling wheel, a pole sheet immersion material tank, a spreading knife, a drying tunnel, roller machines and a reel wheel, and can automatically and efficiently complete the surface treatment of the pole sheet, so the industrialized continuous production is convenient.

Description

Technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a method for preparing lithium ion battery pole pieces and a surface treatment device for lithium ion battery pole pieces. Background technique [0002] Lithium-ion battery is a new type of high-energy secondary chemical battery. Compared with other secondary batteries, it has high voltage, large specific energy, long cycle life, no pollution, no memory effect, small self-discharge, and high operating temperature range. With outstanding advantages, it is a kind of green chemical power source with broad development prospects. Especially in recent years, global resource and environmental protection issues have led to high prices of non-ferrous metals and rare earths, which have caused severe cost pressure and environmental pressure on conventional secondary batteries such as nickel-hydrogen batteries and lead-acid batteries. The field, especially the civilian field, has achieved un...

Claims

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Application Information

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IPC IPC(8): H01M4/139
CPCY02E60/122Y02E60/10
Inventor 黄辉吕焕祥张立军毛秦钟甘永平陶新永范明峰
Owner 湖南三迅新能源科技有限公司
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