Assembly methods and processes for lithium-ion batteries in electric vehicles:
Use a preheated soldering iron to solder the red wire from the power cord socket to the first red connector. Next, use a battery connector wire to solder the blue connector of the first battery to the second red connector. Continue in this manner to connect the third battery, and so on, until only one blue connector remains on the fourth battery. Finally, connect the black wire from the power cord socket to this last blue connector.
Step 1: Ingredients
High-vacuum fully automated material stirring for 10 hours ensures uniform dispersion of materials required for electric vehicle lithium-ion battery packs, improving battery consistency and overall performance.
Step 2: Coating
An automatic feeding system, an automatic blade adjustment system, and an online thickness measurement system are used to coat the positive and negative electrode sheets evenly.
Step 3: Adjusting the rollers
After the positive and negative electrode sheets are coated, the positive and negative materials are relatively loose. A certain amount of pressure needs to be applied to the electrode sheets to compact the positive and negative electrode materials to a certain range.
Step 4: Slice into strips
Depending on the model of the lithium-ion battery pack, the positive and negative electrode sheets need to be cut to the required width. For example, for an 18650 lithium-ion battery, the electrode sheet width is within 56-58mm.
Step 5: Film preparation and winding
A fully automated sheet-making machine is used to weld the positive and negative tabs onto the positive and negative electrode sheets. A fully automated winding machine is then used to wind the positive and negative electrode sheets and the separator together into a cylindrical shape.
Step 6: Bottom grooving and vacuum drying
The core is placed inside the steel casing, and the negative electrode tabs are automatically welded and automatically grooved. Additionally, it undergoes high-vacuum, high-temperature baking to dry out any remaining moisture, ensuring the performance of the lithium-ion battery pack for electric vehicles.
Step 7: Dissolve in water
Lithium-ion batteries undergo charge-discharge testing before shipment; they are charged before leaving the factory.
Step 8: Assemble the lithium-ion battery
The fully automatic welding machine welds multiple lithium-ion batteries together using connecting pieces, then mounts them onto a circuit board, performs aging tests, and inspects them before shipping.
