1. Repair and maintenance: When the battery module fails or needs routine maintenance, the maintenance personnel need to disassemble the battery module first for further inspection and maintenance. After the maintenance, the battery module needs to be reinstalled.

2. Battery replacement: When the battery life in the battery pack expires or other types of batteries need to be replaced, the original battery module needs to be removed first, and then a new battery is installed according to the original layout and connection method.

3. Adjust the battery capacity: According to the actual demand, it is sometimes necessary to increase or decrease the number of batteries to adjust the battery capacity. In this case, it is also necessary to remove the original battery module and install a new battery pack.