Pipe Shield High-Voltage Wiring Harness

The conventional high-voltage wiring harness for HEV is composed of wires and plastic protectors. Because of low heat transfer of the plastic protector, the larger sized wire is needed for high-voltage wiring harness to reduce the Joule-heat loss. Furthermore, high design cost and long lead-time are required to make the mould for a new or modified protector. We have developed the pipe shield wiring harness to eliminate these problems. The pipe shield wiring harness is already in mass-production for Honda CIVIC HYBRID, INSIGHT, CR-Z and FIT HYBRID etc. In this paper, we explain the characteristics and the structure of the conventional high-voltage wiring harness against those of the innovative pipe shield wiring harness. Heat resistance against an external source, weight reduction, simplification of wiring harness assembly and sheath design, electromagnetic shielding performance, and resistance to stone chipping, are described.