What is the manufacturing process of 18650 lithium battery PACK

18650 lithium battery pack process quality characteristics

1. The use of lithium batteries of good quality requires a qualified and stable supplier to provide a single battery with good performance. The single battery has undergone a series of safety tests and performance tests, and used after being qualified.

2. The battery requires low internal resistance and good consistency. Whether 14.8V lithium battery packs or other energy storage battery packs, low internal resistance must be ensured to ensure high-current discharge capacity, platform, heat dissipation, etc.

3. The battery structure adopts a ventilated design, and the distance between two adjacent batteries is not less than 2mm. This structure requires the battery to be fixed with a plastic bracket.

4. The PACK battery factory uses slotted nickel sheets for spot welding. The size of the nickel sheets meets the requirements of high-current discharge. The nickel sheet material guarantees low internal resistance. The spot welder guarantees stable operation. The welding needle guarantees the quality. The operator is trained and qualified. Post job operation, check whether the solder joints are firm after spot welding. In addition, vibration experiments are done for each batch of products to verify the anti-vibration performance.

5. Different batches of batteries are made into typical finished products and subjected to life tests. When the experience of the lithium battery PACK design specification is summarized, the finished battery products are subjected to cycle tests to obtain the actual cycle life.

6. Verify the high and low temperature performance of the battery. The batteries of different PACK lithium battery manufacturers are made into finished products and tested at different rates of discharge at high and low temperatures to obtain the actual discharge curve.

Multi-parallel and multi-string 18650 lithium battery pack design process skills

1. Adopt the principle of priority and easy operation, that is, easy operation by employees.

2. Adopt the principle of first operating safety, that is, employees are not easy to short-circuit or have better preventive measures during operation.

3. Adopt the equipment principle, that is, try not to use manual labor as much as possible with auxiliary equipment, and at least semi-automatically.

4. The packaging design should be reasonable, easy to take and put, and don't leave the product to the customer for a long time.

The above are the key points of the common PACK process for 18650 lithium batteries.