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Rolling method and equipment for battery pole piece

A battery pole piece and electrode technology, which is applied in the direction of battery electrodes, electrode manufacturing, circuits, etc., can solve problems such as bad electrodes, difficult control of foreign matter in the process, and difficult process, so as to improve consistency, improve serpentine defects, and prevent battery cells short circuit effect

Active Publication Date: 2020-06-23
ZHEJIANG FOREVER NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a method and equipment for rolling battery pole pieces, which are used to solve the problems that occur when the rolling process is used to process lithium-ion battery pole pieces in the industry. Problems such as poor electrode thickness consistency, difficult control of foreign matter in the process, and difficult detection and marking of defective electrodes

Method used

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  • Rolling method and equipment for battery pole piece
  • Rolling method and equipment for battery pole piece
  • Rolling method and equipment for battery pole piece

Examples

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Embodiment 1

[0059] Requirements in the production process of battery pole pieces of lithium-ion batteries: (1) In the running direction, the rolling thickness of the battery pole piece must be controlled within the specified range, and it should be continuously stable, and the thickness fluctuation should be as small as possible; The thickness of the battery pole piece is in the transverse direction, and there is no obvious difference in thickness between the central position and the edge position; (2) The moisture content of the battery pole piece is required to be within the specified range. However, when the battery pole piece is rolled by the traditional rolling process, due to the insufficient precision of the unwinding, rolling, and winding actions during the rolling process, it is easy to cause tearing, wrinkling, and thickness changes of the battery pole piece. Larger; when an abnormality occurs, only temporary and simple remedial measures can be taken. In this way, when the batter...

Embodiment 2

[0070] This embodiment provides a battery pole piece rolling equipment, which is used to run the battery pole piece 15 rolling method of the first embodiment. The rolling equipment for battery pole pieces includes a foil heating device 7 , an electrode preheating device 8 , an electrode rolling device 9 and a thickness curing device arranged in sequence.

[0071] See Figure 11-Figure 13 , wherein, the foil heating device 7 is used to heat the foil area of ​​the battery pole piece 15; the electrode preheating device 8 is used to heat the coating area of ​​the battery pole piece 15; the electrode rolling The device 9 is used for rolling the battery pole piece 15; the thickness curing device is used for sequentially baking and cooling the battery pole piece 15, so that the thickness of the battery pole piece 15 is solidified; the electrode rolling device 9 includes The first lamination roller 91, the second lamination roller 92, the first lamination roller support 912, the seco...

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Abstract

The invention relates to the technical field of lithium-ion battery manufacturing, in particular to a rolling method for a battery pole piece. The method comprises the steps of making the coated and dried battery pole piece pass through a foil heating device, an electrode preheating device, an electrode rolling device and a thickness curing device in sequence; when the battery pole piece passes through the foil heating device, heating a foil area of the battery pole piece by using the foil heating device; when the battery pole piece passes through the electrode preheating device, heating a coating area of the battery pole piece by using the electrode preheating device; when the battery pole piece passes through the electrode rolling device, applying rolling force of different sizes to theedge part and the middle part of the battery pole piece by using the electrode rolling device to roll the battery pole piece; and when the battery pole piece passes through the thickness curing device, sequentially baking and cooling the battery pole piece by using the thickness curing device. The invention further provides rolling equipment for the battery pole piece. According to the rolling method and the rolling equipment, the thickness consistency of the rolled battery pole piece is effectively improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing lithium-ion batteries, in particular to a rolling method and equipment for battery pole pieces. Background technique [0002] With the development of lithium-ion batteries, the process technology has also been continuously optimized and improved. At present, in lithium-ion batteries, the electrode production process mainly includes five major processes: homogenization, coating, rolling, slitting, and baking. The pressure process plays a vital role in the performance of lithium-ion batteries. [0003] The rolling process is mainly used in soft pack power batteries and square aluminum case power batteries. The traditional electrode rolling process is as attached figure 1 Shown, including: electrode loading→electrode manual connection→electrode unwinding→electrode rolling→electrode winding. The rolling principle of the traditional rolling process is as follows: figure 2 As shown, the elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/139H01M4/04
CPCH01M4/04H01M4/139Y02E60/10
Inventor 任俊伟吴赛舟姜林华徐尔刚
Owner ZHEJIANG FOREVER NEW ENERGY TECH CO LTD
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