The 18650 lithium battery pack process is mainly formulated according to the pack battery structure. The biggest feature of 18650 lithium battery pack is its flexible combination. Most continuous orders can be completed semi automatically. It can be imagined that the 18650 lithium battery pack process is becoming more and more simple.
Precautions for 18650 lithium battery pack welding process
1. When welding 18650 lithium battery, pay attention to the spot welding current.
2. Pay attention to the diameter of welding needle when welding 18650 lithium battery.
3. When welding 18650 lithium battery, pay attention to the spacing of welding pins.
4. Pay attention to the number of solder joints when welding 18650 lithium battery pack process.
5. During spot welding, fire explosion, short circuit and false welding are not allowed.
Precautions for tin welding of 18650 lithium battery
1. Pay attention to the diameter of tin wire during tin welding of 18650 lithium battery.
2. When soldering 18650 lithium battery, pay attention to the constant soldering temperature.
3. When soldering, it shall be noted that the soldering time shall not exceed how many seconds.
4. Soldering iron heads used for soldering different 18650 lithium battery surface materials are also different.
18650 lithium battery pack process pack
1. Set the internal resistance, voltage and self discharge of the cell.
2. Set the channel and grade.
3. Set the number of groups per channel.
4. If there is any defect, it needs to be isolated and analyzed in time.
Design technology skills of multi parallel and multi series 18650 lithium battery pack
1. Adopt the principle of priority and easy operation, that is, employees are easy to operate.
2. The principle of giving priority to operation safety is adopted, that is, employees are not easy to short circuit or have better preventive measures.
3. The principle of equipment shall be adopted, that is, those completed with the help of auxiliary equipment shall not be manual as far as possible, at least semi-automatic.
4. The packaging design should be reasonable and easy to take and put. Do not take the product out of the customer for half a day.
Quality characteristics of 18650 lithium battery pack process
1. Lithium battery with qualified quality shall be adopted. Qualified and stable suppliers are required to provide single batteries with good performance. The single battery shall be used after passing a series of safety tests and performance tests.
2. It is required that the internal resistance of the battery is low and the consistency is good. No matter 14.8V lithium battery pack or other energy storage battery packs, low internal resistance shall be ensured to ensure the capacity, platform and heat dissipation of high current discharge.
3. The battery structure adopts ventilation design, and the spacing between two adjacent batteries shall not be less than 2mm. This structure requires that the battery be fixed with plastic support.
4. Slotted nickel sheet is used for spot welding of pack battery, and the size of nickel sheet meets the requirements of high current discharge. The nickel sheet material shall ensure low internal resistance, the spot welding machine shall ensure stable operation, and the welding needle shall ensure quality. The operator shall work after being trained, assessed and qualified, and check whether the welding spot is firm after spot welding. In addition, vibration test shall be conducted for each batch of products to verify the anti vibration performance.
5. Different batches of batteries shall be made into typical finished products and life test shall be conducted. When the experience of lithium battery pack design specification is summarized, the finished battery shall be subject to cycle test to obtain the actual cycle life.
6. Verify the high and low temperature performance of the battery. The cells of different pack lithium battery manufacturers are made into finished products, and the actual discharge curve is obtained by different discharge rate tests at high and low temperatures.