A swap cabinet is not a one-time connection. It must preserve low resistance and safe spacing after repeated insertion, cleaning and module replacement. The busbar and terminal should be designed around the service action.
Define insertion cycles and contact resistance
Set module mass, insertion direction, guide features, cycle count and service tools before choosing spring, blade or bolted contacts. Bind the resistance target to current, temperature, finish and probe locations rather than comparing a single number.
Add Cu-Al transition and mis-insertion controls
Cells, cabinets and PCBs may use different metals. State contact orientation, insulation, sealing and drainage for the transition. Use mechanical keying to prevent polarity or voltage-class mis-insertion.
- Record drop, rise and wear before and after cycling
- Inspect spring force and finish loss
- Use torque marks on service-reinstalled joints
Validate production with real swap motions
Run small lots in the real module and cabinet, measuring insertion force, extraction force, alignment error and service time. Production inspection should cover dimensions, material, finish, contact resistance and transit protection.