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Pole piece and pressing method thereof

A pole piece and pressure technology, applied in electrode manufacturing, electrode rolling/calendering, etc., can solve problems such as low efficiency and long stress release time, and achieve the effect of reducing impact, reducing rebound, and not easy to rebound

Active Publication Date: 2016-07-27
SUZHOU GCLSI SCI & TECH IND APPL RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to address the existing problems of long stress release time and low efficiency, and provide a fast and efficient pole piece pressing method that can effectively release the pole piece stress

Method used

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  • Pole piece and pressing method thereof

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0023] see figure 1 , a method for pressing pole pieces, comprising the steps of:

[0024] S1, cold pressing the pole piece for the first time;

[0025] S2, soaking the pole piece after the first cold pressing with solvent vapor;

[0026] S3, drying the soaked electrode piece;

[0027] S4, cold pressing the dried pole piece for the second time.

[0028] Before performing step S1, prepare the pole piece after drawing and drying. The pole piece of the present invention is not particularly limited, and may be a positive pole piece or a negative pole piece.

[0029] In step S1, the main purpose of th...

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Abstract

The invention relates to the field of batteries, in particular to a pressing method of a pole piece.The pressing method includes: performing first cold pressing on the pole piece; performing solvent vapor infiltration on the pole piece after the first cold pressing; drying the pole piece after the infiltration; performing second pressing on the dried pole piece.The pressing method has the advantages that the solvent vapor infiltration and the drying are added between the two pressing processes; during the solvent vapor infiltration, vapor enters the pole piece to allow the directions of the particles on the pole piece to be readjusted and effectively release the stress of the pole piece, and accordingly the bounce of the pole piece is lowered effectively, influence on the overall performance of a battery cell is reduced, and the overall performance of the battery cell is increased; the pressing method is simple and practicable and suitable for industrial large-scale production.The invention further discloses the pole piece.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a pole piece and a pressing method thereof. Background technique [0002] In order to reduce the impact of pole piece rebound on the thickness of the battery cell, two pressings or even multiple pressings are mostly used to reduce the rebound of the pole piece, so as to reduce the impact on the overall performance of the battery cell. At present, the two pressings are two consecutive rollings, that is, the pole piece passes through the two rolling mechanisms continuously and quickly, but after the pole piece undergoes continuous rolling in this way, the stress on the pole piece is relatively large. In order to release the stress of the pole piece, after the pole piece is rolled, the pole piece is left standing for a long time, relying on time alone to release the stress in the pole piece, the process is long and inefficient. Contents of the invention [0003] Based on this, it is nece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04
CPCH01M4/0435Y02E60/10
Inventor 余海君郝三存
Owner SUZHOU GCLSI SCI & TECH IND APPL RES INST CO LTD
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