1. Three basic parameters of positive and negative electrode drawing
Pulling slurry temperature, speed, dressing amount.
2. How to control the amount of dressing of the pole piece?
According to the solid content and specific gravity of the positive and negative electrodes, the tool gap of the pulverizer head is adjusted, and the thickness of the slurry is controlled to achieve control.
3. How to determine the quality of the pole piece during the drawing process.
The surface of the pole piece is smooth, smooth, uniform in dressing, good in adhesion, dry, no stripping, no material loss, lack of material, no dust, no scratches, no bubble, the pole piece is a good pole piece, and the defect is Bad pole piece.
4. Main equipment for positive and negative film pieces.
Paper knives and shears.
5. Main precautions for positive and negative electrodes.
1. Check the knife edge for burrs and unevenness. Pay attention to the safety of the knife when working.
2. The positive and negative cutting blades cannot be mixed.
3. Check the quality of the pole piece at any time during the cutting process, and separate the unqualified bins. Do not confuse them.
4. After the cut piece is inspected, it is transferred to the subsequent process.
6. What is the purpose of the positive and negative baking?
The moisture and organic solvent in the pole piece are removed.
7. What is the purpose of positive and negative sheet compression?
The active material is closely contacted with the grid and the current collecting sheet, the moving distance of the electrons is reduced, the thickness of the pole piece is reduced, the filling amount is increased, and the utilization rate of the battery volume is improved. Thereby increasing the capacity of the battery.
8. What effect does tablet thickness have on battery performance?
When the thickness of the tablet is too thick, the mass of the active material in the battery is easily reduced, the mass of the active material per unit volume is decreased, and the polarization potential is increased, thereby causing a decrease in the capacity of the battery.
When the thickness of the tablet is too thin, the mass of the active material in the battery is likely to increase, and the effective area of the surface of the pole piece is reduced, thereby causing waste of the active material and difficulty in large current.
9. What is the purpose of the pole piece weighing?
Accurately understand and master the amount of dressing of the pole piece.
10. What is the purpose of the film?
The ratio of the amount of the active material on the positive and negative electrode sheets was kept uniform.