The working process and consideration of lithium battery plate coating

Coating is lithium ion battery the key links of the anode production, good cathode material for the battery properties, such as capacity has a direct impact.

So-called polymer coating is refers to paste, molten polymers or polymer solution coating on the thin film composite membrane was made by the way, for the lithium ion battery, coating and substrate (film) is a metal foil, usually for copper foil or aluminum foil.

The coating process is from the substrate in the coating machine (rolling) is called to the coating and the substrate after come out from the coating machine (rolling) is called a number of continuous process.The whole process is: put the volume - sheet - pull piece to tension control, automatic correction to coating, drying - tension control and automatic correction - winding.

From this flow chart, tension control and "automatic correction" is not a separate process, but between two processes of auxiliary means, it is by the coating machine set good, the precision of tension control and automatic adjustment reflects the quality of the coating machine.

Under such a process, coating machine work method is composed of the following steps:

1, copper/aluminum foil rolling device by into coating machine;

2, the beginning and the end of the substrate after splicing connection into continuous belt;

3, continuous strip by pulling plate device into "tension control" and "automatic correction device, and then into the coating device;

4, spreading stage: pole piece pulp in the coating at predetermined coating weight and length of blank section;

5, dry: after coating way to dry the wet sheet into dry, drying temperature set according to the speed and the thickness of coating;

6, molding: dry pole piece after "tension control" and "automatic correction" after forming, winding.

impact lithium battery positive pole piece coating performance factors or parameters have the following: 1, volume and winding diameter;2, width and the maximum effective roll surface coated width;3, coating method and speed;4, coating thickness and accuracy;5, the rectifying precision;6, the drying temperature.

If a coating machine equipment in the six aspects: to do good, you can through the complete process, obtained the very good production effect, for the next step to create a higher capacity lithium battery to lay the foundation.Because the lithium battery is actually a process of lithium ion to the positive movement, the anode material, the better, can accept lithium ion will be, the more performance for the lithium battery capacity, the greater the power, the more sufficient.

The page contains the contents of the machine translation.