Step 1. sorting the cells to keep the cells voltage in one battery pack at similar level(to reduce the voltage difference value)
Step2. put the nickles and support in the mold
Step3. put the sorted cells in the mold
Step4. fix the cells with glue
Step 5. welding
Step 6 wrap the cells with Insulation tape
Step 7 welding port for the wiring
Step 8. connect the cells to YANYANG BMS (The BMS has functions of protecting battery from over-charging, over-discharging, over-voltage, under-voltage , over-current , over-temperature and keep the battery from being short-circuit and extend the battery lifespan
Step 9. Do a charge-discharge circle test
Step 10. place the battery on the shelf for about 10 days
Step 11. put the battery in box and do a ultrasonic welding (enable the battery water-proof)