Cutting method for electrode coating

Abstract

The invention discloses a cutting method for electrode coating. The cutting method comprises the following steps: firstly feeding a pole piece to the blanking procedure smoothly by a piece storage system, blanking and cutting the electrode coating with a laser knife according to the given size and then feeding the blanks to the forming procedure smoothly by the piece storage system to undergo forming cutting. The cutting method is characterized in that the two procedures are completed through laser cutting; the gripping and conveying procedure of the electrode coating is automatically completed by a machine; and dust collection devices are arranged in the forming procedure. By adopting the method, not only is the labor cost reduced and the stability of the pole piece cutting process ensured, but also the work efficiency is improved.

Description

technical field [0001] The invention relates to a method for manufacturing a lithium battery, in particular to a cutting method for electrode coating. Background technique [0002] In the production process of the product lithium battery, the forming and cutting process of the electrode sheet is a very important process in the whole production process, which directly affects the production efficiency, quality and quantity of the product. In the general production process, people’s blanking and forming process for electrode sheet coating is to manually send the electrode coating to the bottom of the pressing mechanism, and use the die to punch to obtain the electrode sheet of the desired shape. However, such a process may produce burrs, which may puncture the diaphragm between the positive and negative electrodes and cause a short circuit between the positive and negative electrodes of the battery. In severe cases, the battery may explode. Moreover, the life of the mechanica...

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Problems solved by technology

However, such a process may produce burrs. The burrs may puncture the diaphragm between the positive and negative electrodes and cause a short circuit between the positive and negative electrodes of the battery. In severe cases, the battery may explode.

Moreover, the service life of the mechanical cutter will be affected by the material of the pole piece. After a period of use, maintenance is required, and the maintenance and repair costs are relatively high, and the mechanical cutter is not suitable for cutting pole pieces with irregular fracture shapes.

In addition, the mechanical cutting method is adopted. When cutting, the cutter directly makes physical contact with the pole piece, and the cutter will exert a certain force on the pole piece. This force may deform the pole piece or make its snake bend larger. At the moment of cutting off, a huge tangential force will be generated to change the crystal structure of the pole piece, thus affecting the performance of the battery

Due to the manual transmission mode, it cannot adapt to modern mechanical automation production, and the work efficiency of such a process is not high

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