902030 lipo battery.18650 lithium battery PACK process quality characteristics and welding precautions

18650 lithium battery PACK process quality characteristics and welding precautions. 18650 lithium battery is one of the most common lithium-ion batteries currently on the market. The 18650 lithium battery PACK process is mainly formulated based on the PACK battery structure, most of which are 18650 lithium batteries.

18650 lithium battery PACK process quality characteristics and welding precautions. 18650 lithium battery is one of the most common lithium-ion batteries currently on the market. The 18650 lithium battery PACK process is mainly formulated based on the PACK battery structure. Most of the 18650 lithium battery PACK process features are similar. The characteristic is that the multi-parallel and multi-series 18650 lithium battery PACK process features are very distinctive. The biggest feature of the 18650 lithium battery PACK is Flexible combinations.

The general 18650 lithium battery PACK battery pack includes: 18650 cells, battery protection plate, connecting nickel sheet, lead nickel sheet, green paper accessories, insulating paper, wires or plug wires, PVC outer packaging or shell, output, key switch, The battery indicator, as well as auxiliary materials such as EVA, highland barley paper, and plastic brackets, together form the PACK.

18650 lithium battery PACK process quality characteristics

1. To use lithium batteries with acceptable quality, qualified and stable suppliers are required to provide single cells with good performance. The single cells must undergo a series of safety tests and performance tests and be used after passing them.

2. The battery is required to have low internal resistance and good consistency. Whether it is a 14.8V lithium battery pack or other energy storage battery pack, low internal resistance must be ensured to ensure the capacity, platform, and heat dissipation of large current discharge.

3. The structure of the 18650 lithium battery PACK adopts a ventilation design. There should be a gap of no less than 2mm between two adjacent batteries. This structure requires a plastic bracket to fix the battery.

4. The PACK battery factory uses slotted nickel sheets for spot welding. The size of the nickel sheets meets the requirements for large current discharge. The nickel sheet material ensures low internal resistance. The spot welding machine ensures stable operation. The welding needles ensure quality. The operator has been trained and assessed and qualified. After starting the operation, check whether the solder joints are firm after spot welding. In addition, vibration tests are conducted on 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 lithium battery PACK design specification experience 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 18650 lithium battery PACK. The cells of different PACK lithium battery manufacturers are made into finished products and discharged at different rates under high and low temperatures to obtain actual discharge curves.

What should you pay attention to when welding the 18650 lithium battery PACK process?

1. When welding 18650 lithium battery PACK, attention should be paid to the current of spot welding.

2. When welding 18650 lithium battery, you should pay attention to the diameter of the welding pin.

3. When welding 18650 lithium battery, you should pay attention to the spacing between welding pins.

4. Pay attention to the number of solder joints when welding the 18650 lithium battery PACK process.

5. There should be no explosion, short circuit, or false welding during spot welding.

6. When soldering 18650 lithium battery, attention should be paid to the diameter of the tin wire.

The above are the process quality characteristics and welding precautions of 18650 lithium battery PACK. Currently, the more influential companies in the PACK field include Pride, Sunwanda, Desay Battery, Beijing Aisikai, Shanghai Jiexin, Oupenbach, etc. . Therefore, it would be more reasonable in terms of cost control to leave PACK to a more professional PACK company.