Lithium-ion battery kneading process principle and process
Kneading principle: depending on the high-speed rotation angle of the mixing slurry, the surface and material attack resistance must be inclined to the material moving tangentially along the plasma surface, one reason for the influence of centrifugal force, the material is mixed into the inner wall, along the wall, and then rises to a certain height , because of the effect of gravity, falls back to the center of the impeller again, and is thrown out. The upward movement is combined with the tangential movement so that the material is actually in a continuous spiral motion. Due to the high speed of the blade and the moving speed of the material, the fast-moving particles collide and collide with each other, so that the quality of the particles or suspected aggregates is damaged, and the temperature of the material also rises accordingly, which is conducive to the adsorption of powders of various additives.
The kneading operation generally has the following characteristics:
1. The kneading operation is often accompanied by a heating or cooling process. On the one hand, the kneader should have a satisfactory heat transfer surface per unit volume.
2 Differential mixing kneading characteristics analysis and 3D flow field simulation of the kneader in small space and high shear zone can attack high shear stress, loose materials, and the shape of the mixer transmission parts (such as the shape of the impeller) to ensure that the material The movement patterns and movement planning within the kneader are continuously accepted by small open high shear belts, shear and loose uniformity repeatedly.
3. Compared with other kneading operations, the kneading operation is difficult and the kneading time is long. Only in the accounting sense can complete kneading conditions be obtained.
1. The effect of mixing speed on relaxation speed. In general, the higher the mixing speed, the faster the decay speed, but the greater the harm to the structure of the data itself and the device.
2. The effect of concentration on loosening speed and bond strength. In general, the smaller the slurry concentration, the faster the relaxation rate, but too thin will result in wasted data and increased slurry deposition. The higher the concentration, the stronger the kneading strength and the stronger the bond strength. The lower the concentration, the lower the bond strength.
3. The effect of vacuum degree on the relaxation rate. The high vacuum is beneficial to the discharge and appearance of the gas in the data gap, reducing the difficulty of liquid adsorption. In the case of complete weightlessness or weightlessness, the difficulty of relaxing uniformity is greatly reduced.
4. The effect of temperature on the relaxation rate. The temperature is suitable, the slurry activity is good, and it is easy to relax. The skin size that is too hot is too short, and the active size that is too cold is greatly reduced.
