According to the BOM,verify whether the item and BOM requirements and quantity are consistent
Cell voltage and internal resistance are selected according to process standards, and defective products are returned to the warehouse
Configuration standard: capacity difference < 1%, the internal resistance is 0.2m Ω. Voltage difference ≤ 10mv
Assemble the battery cells according to the SOP requirements
The output power of the aluminum bus-bar is adjusted according to different welding machines, and the welding shape is selected with a diameter of 5mm for welding
The welding mark should be smooth and bright, without blackening or oxidation marks, and the welding tension should be ≥ 550N
The signal collection wire is installed in sequence starting from B0, and after installation, each group of voltage differences needs to be tested to ensure correct installation
The power wire is installed first negative and then positive, and a torque wrench is required for locking
BMS connections are connected in the sequence of (B -, cell voltage/temp, pickup cable, P -）
Use a voltage internal resistance tester with a voltage range of 60V and an internal resistance range of 300m Ω for measurement
Install the battery pack according to the direction requirements of the SOP, and use a torque wrench to lock the positive and negative poles
The appearance should not be scratched or damaged, and the gap between the upper and lower covers should be less than 2mm
Set up the aging process according to the corresponding model inspection standards, and save complete aging data after aging is completed
Label according to SOP requirements, and the label should not be damaged or wrinkled. The posting position should be fixed and unified
The hardware version of the BMS uses a comprehensive tester to test the charging and discharging functions, as well as voltage and internal resistance. The software version of the BMS requires simultaneous connection to the upper computer to verify the charging and discharging current and parameter settings
Pack corresponding accessories and UM according to SOP requirements
