New energy vehicles use batteries as the power source. The operating current of the electronic control system of the car body is mostly between 1-100A. In special cases, there will be a short-time 200-300A current, and the starting current of the vehicle is even as high as 1500A. . In such a working environment, the milliohm resistance in the automotive electronic system is required to instantaneously receive high load power, which is a test of the performance of the resistor.


Many automotive resistors use an etched alloy foil resistor structure with a thickness between 20 and 150 mm, so heat dissipation from the resistor material to the terminals is not possible. One of the current solutions is to bond a resistive alloy foil to a substrate material (copper or aluminum) that also has good thermal conductivity with a thin, thermally conductive adhesive. This structure can effectively transfer heat to the surrounding environment, ensuring that the resistor has a very low thermal internal resistance, usually between 10-30K/W, which can effectively cope with the problem of instantaneous high load power heating of automotive electronics.