The silicon carbide rod clamp fixes the connecting belt, and the connecting wire of the contact element adopts aluminum braided belt or multilayer aluminum foil. The outer clamp only serves as a clamping function and is not used for conducting electricity. The end of the wire is connected to the bus bar. In order to prevent stress from being transmitted to the component, the length of the wire should be slightly longer than the straight-line distance between the component and the bus bar.