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Negative electrode sheet module and preparation method thereof, method for manufacturing battery and battery

A technology for negative electrode sheets and components, which is applied in the field of negative electrode sheet components and their preparation, can solve the problems of battery safety impact, battery needs to be improved, prone to dislocation, etc., to improve product quality, safety and other performance improvements, and improve stacking efficiency. Effect

Inactive Publication Date: 2019-04-02
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the battery is directly packaged after stacking, and misalignment will occur between the internal layers of the battery during use. Especially when it is used in automobiles, when vibration or collision occurs, misalignment between the pole pieces inside the battery is very easy to occur. Impact on battery safety
[0004] Therefore, the current battery still needs to be improved

Method used

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  • Negative electrode sheet module and preparation method thereof, method for manufacturing battery and battery
  • Negative electrode sheet module and preparation method thereof, method for manufacturing battery and battery
  • Negative electrode sheet module and preparation method thereof, method for manufacturing battery and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation steps:

[0053] 1. Reference figure 2 In the process flow shown, the negative electrode sheet 10, the separator 20 and the protective film 30 are all provided in the form of rolls, and there is a hollow cup in the middle, and the negative electrode sheet 10, the separator 20 and the protective film 30 are directly assembled on the thermal compound machine. On the hanging shaft, the middle is the negative electrode sheet 10, and the two sides of the negative electrode sheet 10 are the separator 20 and the protective film 30 respectively. Position 40 (such as hot rolling furnace), after hot rolling, the separator is adsorbed on the surface of the negative electrode sheet, and the protective film will be wound and recycled by the reel for reuse. Among them, the load of the hot roll pressing was 2000 kgf, the temperature was 90° C., and the speed was 30 m / min. Then, the obtained stacked structure is cut according to a predetermined size to obtain a negative e...

Embodiment 2- Embodiment 10

[0059] The specific preparation steps and testing methods are the same as those in Example 1, except that the hot rolling parameters for preparing the negative electrode sheet assembly and the hot pressing parameters for stacked products are shown in Table 1.

[0060] Table 1

[0061]

[0062]

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Abstract

The invention provides a negative electrode sheet module and a preparation method thereof, a method for manufacturing battery and a battery. The preparation method of the negative electrode sheet assembly comprises the steps of: adsorbing a separation film on the upper surface and the lower surface of an elongated negative electrode sheet through thermal recombination to obtain a laminated structure, wherein a protective film is used at the outer surface of the separation film when the hot rolling process of the thermal recombination is performed; and cutting the laminated structure to obtaina negative electrode sheet module. The negative electrode sheet module is employed to prepare the battery, the steps are greatly simplified in the assembling process, the working efficiency is obviously improved, for the laminated battery, the lamination efficiency can be improved for three times, the absorption combination is achieved between the layers of structures of the battery obtained through preparation, the anti-impact, anti-shock and safety performances of the battery are greatly improved, the product quality is improved, and when the hot rolling is performed, the outer surface of the separation film adds the protection film to effectively prevent the coating at the surface of the separation film from falling off or being bonded at the surface of the hot rolling compression roller.

Description

technical field [0001] The invention relates to the technical field of chemical batteries, in particular to a negative plate assembly, a preparation method thereof, a method for preparing a battery and a battery. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy, long life, safety, and environmental protection, and have been widely used in notebook computers, mobile phones, digital cameras, electric vehicles, energy storage and other fields. With the continuous development of the demand for computers, mobile phones, electric vehicles, etc., batteries are required to have higher energy density. [0003] At present, there are two main methods for preparing lithium-ion battery cells: winding and stacking. Cylindrical and square lithium-ion batteries generally adopt the winding method, while the stacking method is mainly used in the production of pouch batteries and some square batteries. Winding is to align the positive electrode ...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/13H01M10/0585H01M10/0525H01M10/42
CPCH01M4/13H01M4/139H01M10/0525H01M10/0585H01M10/4235Y02E60/10Y02P70/50
Inventor 刘小安金省周杨树涛全炳禧
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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