Method and apparatus for improving water-based negative electrode plate adhesion and cracking

A negative electrode sheet and adhesion technology, which is applied in the field of lithium ion battery electrode sheet preparation, can solve problems such as cracks affecting the negative electrode sheet adhesion, and achieve significant economic value, simple equipment, and avoidance of mistakes and forgetting effects.

Pending Publication Date: 2018-09-04
ZHENGZHOU BAK BATTERY CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, this phenomenon will seriously affect the adhesion of the negative electrode sheet and the crack of the electrode sheet.

Method used

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  • Method and apparatus for improving water-based negative electrode plate adhesion and cracking
  • Method and apparatus for improving water-based negative electrode plate adhesion and cracking

Examples

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Effect test

Embodiment 1

[0029] A method and device for improving the adhesion and cracks of water-based negative electrode sheets, comprising the following steps:

[0030] (1) After the coated electrode piece of the extrusion coating machine enters the coating and drying area 10, the coating and drying area 10 is divided into eight sections, which are respectively marked as the first section 1, the second section 2, and the third section. Section 3, Section IV Section 4, Section V Section 5, Section VI Section 6, Section VII Section 7, Section VIII Section 8, each of which is equipped with a return air outlet 16, and at II2 , Ⅴ5, Ⅵ6 large joints are equipped with an exhaust system;

[0031] (2) Each large section is subdivided into three subsections, each large section is equipped with a return air damper and an exhaust air valve at the first and third subsections, and each large section at the second subsection Each is provided with an observation port 9;

[0032] (3) Reduce the angle of the venti...

Embodiment 2

[0039] After the extrusion coating machine coated electrode piece enters the coating drying area 10, the coating drying area 10 is divided into eight major sections, and the draft air valve angle of the first section of the third section 3 in the coating drying area 10 is Turn it down by 5 degrees, and increase the angle of the exhaust damper of the third section by 10 degrees; increase the angle of the exhaust damper of the first section of the fourth section of the fourth section by 5 degrees; increase the angle of the first section of the fifth section of the fifth section. The angle of the air valve is increased by 10 degrees; at the same time, a humidifying device is installed at the return air outlet 16 of the third, fourth, and fifth sections of the coating drying area 10 to increase the humidity of the return air, and the water storage 11 is passed through the delivery The water pipe I12 is connected to the humidifier 13. When the water level in the humidifier 13 is low...

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Abstract

The present invention provides a method and apparatus for improving adhesion and cracking of a water-based negative electrode plate, comprising the steps of: (1) after an extrusion coater coats an electrode plate, then the electrode plate enters a coating baking zone which is divided into eight large sections;(2) each large section is subdivided into three small sections, and each of the first andthird small sections of each large section is provided with an air return valve and an air draft valve;(3) the angle of the air draft valve of the first small section at the third large section is decreased by 5 degrees; and the angle of the air draft valve of the third small section is increased by 10 degrees, the angle of the air draft valve of the first small section of the fourth large section is increased by 5 degrees, and the angle of the air draft valve of the first small section of the fifth large section is increased by 10 degrees; (4) and a humidifying device is arranged at each ofthe return vents of the third, fourth and fifth sections of the coating baking zone. The present invention has the advantages of effectively improving the problem of poor adhesion and cracking of thewater-based negative electrode plate by changing the opening angles of the air draft valves of the third, fourth and fifth large sections and arranging the humidifying devices on the return vents ofcorresponding large sections.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium-ion battery pole pieces, in particular to a method and a device for improving the adhesion and cracks of water-based negative pole pieces. Background technique [0002] After being coated by a coating machine, the electrode sheets of lithium-ion batteries need to be rolled to increase the density and uniformity of the active material of the electrode sheet to improve the capacity and safety of the electrode sheet. The electrode of the cloth is dried, and the drying process is mainly to prevent the moisture in the coating material from affecting the quality and performance of the battery. [0003] Due to the change of four seasons in the northern climate and the existence of daytime temperature differences, the dryness of the air varies greatly. If the dryness of the pole piece is controlled by changing the parameters of the drying area, there is great uncertainty, and the parameters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/02
CPCB05D3/0254
Inventor 丁永辉李艳斌王飞任亚辉
Owner ZHENGZHOU BAK BATTERY CO LTD
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