Cylindrical Lithium Battery Production Process | JCT Machinery

1. Cutting and Shaping of Battery Cells

After coating and drying, the positive and negative electrodes need to be cut into appropriate sizes to fit the shape of the cylindrical battery.

The electrode sheets need to be surface treated when cutting to ensure good contact performance and consistency.

2. Winding of Electrode Sheets

The positive electrode sheet, separator and negative electrode sheet are wound into a tight battery cell in a certain order. The function of the separator is to prevent direct contact between the positive and negative electrodes and prevent short circuit.

The winding of the battery cell needs to ensure tightness, symmetry and consistency. The winding quality directly affects the capacity, internal resistance and stability of the battery.

3. Battery Shell Assembly

After the battery cell is wound, it is placed in a cylindrical shell (usually a steel shell or an aluminum alloy shell).

During the assembly process, ensure the fixation and conductivity of the battery cell to avoid displacement or poor contact of the battery cell during battery use.

4. Battery Packaging

After the battery cell is placed in the shell, it needs to be sealed. Common sealing methods include spot welding, spinning or laser welding.

After packaging, the negative terminal, positive terminal and safety valve of the battery need to be installed.

5. Battery Injection Electrolyte

After sealing, the battery needs to be injected with electrolyte. The quality of the electrolyte directly affects the performance of the battery. The injection process needs to ensure that the battery is full of electrolyte.

After the electrolyte is injected, the battery needs to be left to stand and evacuated to remove bubbles and impurities inside the battery.