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Method for simultaneously producing lithium ion battery pole pieces of multiple models and extrusion coating device

A lithium-ion battery, battery pole piece technology, applied in the direction of electrode extrusion, battery electrode, electrode current collector coating, etc., can solve problems such as poor production flexibility, improve production flexibility, improve production flexibility, and improve production efficiency Effect

Active Publication Date: 2019-04-05
中创新航科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing multiple types of lithium-ion battery pole pieces at the same time, thereby solving the problem of poor production flexibility of the existing method
[0006] The present invention also provides an extrusion coating device for producing various types of lithium-ion battery pole pieces, so as to solve the problem that the existing extrusion coating equipment cannot realize simultaneous production of various types of battery pole pieces on one production line

Method used

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  • Method for simultaneously producing lithium ion battery pole pieces of multiple models and extrusion coating device
  • Method for simultaneously producing lithium ion battery pole pieces of multiple models and extrusion coating device
  • Method for simultaneously producing lithium ion battery pole pieces of multiple models and extrusion coating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Table 1 shows the dimensions of the die shims involved in the methods of Embodiment 1 and Embodiment 2 and the die shims of the comparative example.

[0039] Die gasket size involved in table 1 embodiment and comparative example

[0040] Numbering

d1 / mm

d2 / mm

d3 / mm

comparative example

367.5

367.5

57.5

Example 1

367.5

283.5

56.5

Example 2

367.5

343.5

49.5

[0041] The design parameters of battery type 1, battery type 2, and battery type 3 are shown in Table 2.

[0042] Table 2 Design parameters of different battery models

[0043]

[0044] Table 3 shows the measured coating void size data of the comparative examples and examples.

[0045] Table 3 Comparative Example and the actual measurement coating void size data of embodiment

[0046]

[0047]

[0048] Use a steel ruler with an accuracy of 0.5mm to measure the coating area and blank size of the coated pole piece; use a Ф25mm circular s...

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Abstract

The invention relates to a method for simultaneously producing lithium ion battery pole pieces of multiple models and an extrusion coating device. The method comprises the following steps of 1) according to different width coating requirements of battery pole pieces of different models, enabling coating slurry to be coated on the same current collector according to the different width coating requirements, after coating, performing drying and rolling to form at least two coating strips which are arranged at intervals along the direction perpendicular to the coating direction formed on the current collector, wherein a middle reserved blank area is formed between every two adjacent coating strips; and 2) cutting the middle reserved blank area along the coating direction to obtain pole stripsused for preparing the battery pole pieces of different models, wherein the pole strips are cut, and battery pole pieces of different models are obtained respectively. According to the method, the coating strips with different coating widths are coated on the current collector through an asymmetric zebra coating method, so that at least two different types of battery pole pieces can be produced on one production line, the production efficiency of the battery pole pieces of different models is improved, and the production flexibility of the coating production line is effectively improved.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion batteries, and in particular relates to a method and an extrusion coating device for simultaneously producing pole pieces of various types of lithium-ion batteries. Background technique [0002] Lithium-ion batteries are widely used in consumer electronics, power batteries and other fields due to their advantages such as high working voltage, high energy density, small size, large capacity, long cycle life, and no memory effect. The coating of pole pieces is an important process in the production of lithium-ion batteries. In recent years, the coating technology has also developed from the traditional low-speed transfer coating (roller coating) to high-speed extrusion coating (spray coating). Way. [0003] The Chinese patent application whose publication number is CN106216171A discloses a kind of extrusion coating method, and it is to adjust the coating width by adjusting the opening size...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/04
CPCH01M4/0404H01M4/0409H01M4/0411H01M4/139Y02E60/10
Inventor 李宗达董义韩会会庞可可冯成伟
Owner 中创新航科技股份有限公司
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