RE: Copper Demand10 Jun 2023 10:59
That depends on what you term heavy loads, SmartPunter. Relative to the car itself, the motors and the cables to them, and the charging circuits, carry very heavy electric loads. Performance cars like Teslas have engines with powers in the order of 500kW. Instrumentation, generally, will have light loads. Audio, main lighting, heating and cooling, servo assistance of brakes, steeering, seat position adjustment etc, would generally have medium loads, each of which will be in the several tens to several hundred Watt range. While many of the loads will be intermittent, the cables for them need to be there all the time, so there will be a significant quantity of copper needed. Using highter voltages is most beneficial on the higher loads, such as traction and charging. With the smaller loads, mechanical strength of the conductors will predominantly dictate the size of the cable and hence the amount of copper that will be required. Tricks such as multiplexing loads can be used to reduce the number of conductors but that adds complexity. Hopefully this is clear.