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Laminate and lamination method and application thereof

A technology of lamination and lamination, applied in sustainable manufacturing/processing, electrochemical generators, electrical components, etc., can solve problems such as pole piece movement, potential safety hazards of cell performance, and negative pole pieces not covering positive pole pieces.

Inactive Publication Date: 2020-12-22
昆山聚创新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the transfer process of the laminated body, the pole pieces often move, resulting in misalignment of the positive and negative pole pieces, and the width, length and alignment of the laminated body cannot meet the process standards
In the production process, the dislocation laminates that have been judged as unqualified will be reworked, which will consume a lot of manpower and material resources; situation, leading to serious safety hazards in battery performance

Method used

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  • Laminate and lamination method and application thereof
  • Laminate and lamination method and application thereof
  • Laminate and lamination method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) In the 3KV high-frequency high-voltage discharge environment, the gel diaphragm (made of base film PE, nano-scale Al 2 o 3 Composed of ceramic layer and PVDF layer) corona treatment is carried out on both sides, and the corona time needs to be controlled at 1s; use high-temperature gas to heat the corona-treated gel diaphragm, the temperature of the high-temperature gas is 80°C, and the heating time is 15s;

[0054] 2) using the gel separator, positive electrode sheet and negative electrode sheet obtained in step 1) to carry out lamination processing, so as to obtain the crude product of the laminate;

[0055] 3) Under the conditions of a hot-pressing temperature of 110°C and a hot-pressing pressure of 2.5KPa, the crude laminate is subjected to hot-pressing treatment to obtain a laminated body.

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PUM

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Abstract

The invention discloses a laminate and a lamination method and application thereof. The lamination method comprises the following steps: (1) sequentially carrying out corona treatment and heating treatment on a gel diaphragm; (2) carrying out lamination treatment on the gel diaphragm obtained in the step (1), a positive plate and a negative plate to obtain a crude product of a laminated body; and(3) carrying out hot-pressing treatment on the crude product of the laminated body to obtain the laminated body. By adopting the lamination method, the alignment degree of the laminated body can be remarkably improved, the overall thickness of the battery cell and the thickness fluctuation of the battery cell can be reduced, and the short-circuit detection efficiency of the battery cell and the multiplying power and the cycle performance of the battery cell can also be improved.

Description

technical field [0001] The invention belongs to the field of batteries, in particular, it relates to a laminated body and its stacking method and application. Background technique [0002] The current lithium battery production process is generally divided into two assembly methods: winding and lamination, and the pouch cell generally adopts the lamination process. The lamination process is to use the diaphragm to swing back and forth in a zigzag shape during the production process, stack the positive and negative electrodes together in a certain cross order, and finally fix them with adhesive tape to form a laminated body. The standards for evaluating the qualified laminate are generally several key parameters such as the width, length, thickness and alignment of the laminate. The prior art solution is to fix the laminate by sticking an adhesive tape on the surface of the laminate. However, as the requirements for energy density and system supporting design are getting hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0583H01M10/052
CPCH01M10/052H01M10/0583Y02E60/10Y02P70/50
Inventor 徐一帆常柯李奎黎帆
Owner 昆山聚创新能源科技有限公司