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Method for drying lithium ion battery pole pieces

A technology of lithium ion battery and drying method, which is applied in the directions of pretreatment surface, coating, device for coating liquid on the surface, etc. The effect of efficiency

Inactive Publication Date: 2014-09-10
赖昭文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for drying lithium-ion battery pole pieces, which can solve the problems of time-consuming and energy-consuming drying of existing lithium-ion batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The lithium-ion battery pole piece drying method of the present embodiment is as follows:

[0014] A. Put the lithium-ion battery pole piece into a vacuum drying oven for drying, the drying temperature is 80°C, the pressure is 0.05MPa, and the drying time is 10 minutes;

[0015] B. Introduce nitrogen with a moisture content of less than 10ppm into the drying box and keep nitrogen for 15 minutes;

[0016] C. Vacuumize to 0.05MPa, repeat step A and step B in sequence for 3 times, to obtain final product.

Embodiment 2

[0018] The lithium-ion battery pole piece drying method of the present embodiment is as follows:

[0019] A. Put the lithium-ion battery pole piece into a vacuum drying oven for drying, the drying temperature is 100°C, the pressure is 0.04MPa, and the drying time is 8 minutes;

[0020] B. Introduce nitrogen with a moisture content of less than 10ppm into the drying box and keep it for 12 minutes;

[0021] C. Vacuumize to 0.04MPa, repeat step A and step B in sequence for 3 times, to get final product.

Embodiment 3

[0023] The lithium-ion battery pole piece drying method of the present embodiment is as follows:

[0024] A. Put the lithium-ion battery pole pieces into a vacuum drying oven for drying. The drying temperature is 120°C, the pressure is 0.02MPa, and the drying time is 6 minutes;

[0025] B. Introduce nitrogen with a moisture content of less than 10ppm into the drying box and keep it for 10 minutes;

[0026] C. Vacuumize to 0.02MPa, repeat step A and step B in sequence for 3 times, to get final product.

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Abstract

The invention discloses a method for drying lithium ion battery pole pieces, and relates to the technical field of lithium ion batteries. The method comprises the following steps that the lithium ion battery pole pieces are placed in a vacuum drying box to be dried, the drying temperature is 80-120 DEG C, pressure is 0.02-0.05 MPa, and the drying time is 6-10 minutes; nitrogen is led into the drying box for 10-15 minutes, the drying box is vacuumized to 0.02-0.05 MPa, the step A and the step B are sequentially executed for three times, and the dried lithium ion battery pole pieces are obtained. Compared with the prior art, drying time is shorter, energy consumption is low, the dried pole pieces are good in softness, battery manufacturing is facilitated, and battery production efficiency can be conveniently improved.

Description

technical field [0001] The invention relates to the technical field of making lithium-ion batteries, in particular to a method for drying lithium-ion battery pole pieces. Background technique [0002] The pole piece has a significant impact on the performance of the lithium-ion battery, and the drying of the pole piece is an important step in the treatment process of the pole piece. The drying of the pole piece of the lithium-ion battery is to dry the good-cut black powder layer coated on the surface of the pole piece. , so that the pole piece is folded without revealing the steel mesh after drying. Existing drying of lithium battery pole pieces is heated by blowing hot air. This drying method needs to be heated for 4 to 5 hours to achieve a better drying effect, which is not only time-consuming, but also consumes a lot of energy. Contents of the invention [0003] The object of the present invention is to provide a method for drying lithium-ion battery pole pieces, which...

Claims

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Application Information

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IPC IPC(8): B05D3/02B05D3/04
Inventor 赖昭文
Owner 赖昭文
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