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Preparation method and surface treatment device of lithium ion battery pole piece

A lithium-ion battery, pole piece technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as multi-floating powder, and achieve the effects of improving cycle life, improving adhesion, improving yield and safety performance

Inactive Publication Date: 2015-09-16
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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  • Preparation method and surface treatment device of lithium ion battery pole piece
  • Preparation method and surface treatment device of lithium ion battery pole piece
  • Preparation method and surface treatment device of lithium ion battery pole piece

Examples

Experimental program
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preparation example Construction

[0037] like figure 1 Shown, is the technological process of the preparation method of lithium-ion battery pole piece of the present invention, comprises:

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

[0039] 2) Frame 3 is the pole piece surface treatment process, followed by pole piece unwinding, deviation correction, pole piece soaking trough, surface scraping, drying tunnel, counter roll, pole piece winding, and the coated slitting The final pole piece is soaked in a water-soluble polymer treatment solution, and then dried to form a polymer film (that is, a polymer film) on the surface of the pole piece, soaked in the pole piece soaking tank, and dried in the drying tunnel;

[0040] The water-soluble polymer treatment liquid includes water and water-soluble polymer compounds, and the water-soluble polymer compounds are gelatin, carboxymethyl cellulose, hydr...

Embodiment 1

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

[0049] The pole piece surface treatment process is successively the pole piece unwinding, deviation correction, soaking, scraping, drying, rolling, and winding procedures. The surface treatment device for the lithium ion battery pole piece of the present invention in the specific embodiment is adopted, depending on the discharge The winding wheel 4, the deviation correction guide wheel 17, the pole piece soaking material tank 5, the scraper knife 6, the drying tunnel 7, the roller machine 8 and the take-up wheel 9 are realized. There is a water-soluble polymer treatment solution 19 in the pole piece soaking tank 5, soaking in the pole piece soaking tank 5, and drying in the drying tunnel 7.

[0050] Preparation of water-soluble polymer treat...

Embodiment 2

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

[0054] The pole piece surface treatment process is successively the pole piece unwinding, deviation correction, soaking, scraping, drying, rolling, and winding procedures. The surface treatment device for the lithium ion battery pole piece of the present invention in the specific embodiment is adopted, depending on the discharge The winding wheel 4, the deviation correction guide wheel 17, the pole piece soaking material tank 5, the scraper knife 6, the drying tunnel 7, the roller machine 8 and the take-up wheel 9 are realized. There is a water-soluble polymer treatment solution 19 in the pole piece soaking tank 5, soaking in the pole piece soaking tank 5, and drying in the drying tunnel 7.

[0055] Preparation of water-soluble polymer treat...

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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 preparation method of 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 resources and environmental protection issues have led to high prices of non-ferrous metals and rare earths, causing serious cost pressure and environmental protection pressure on conventional secondary batteries such as nickel-metal hydride batteries and lead-acid batteries. Lithium-ion batteries are used in most It h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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