A method on HPR critical route identification and evaluation in electric trucks

Heavy-duty vehicles, particularly those towing higher weights, require a continuous/secondary braking system. While conventional vehicles employ Retarder or Engine brake systems, electric vehicles utilize recuperation for continuous braking. In a state where high voltage battery of electric vehicles is at 100% of its designed capacity, at such scenario if vehicle travels on a route which has brake requirement, all this recuperated energy generated from the vehicle operation is passed on to high performance brake resistors(HPR) and this energy gets converted from electrical energy into waste heat energy. This study focuses on a method for identification of such a routes, which are critical for Brake Resistors, by analyzing the elevation data of existing charging stations, the route’s slope distribution, and the vehicle’s battery SOC. In the results entire method is demonstrated with the example of all the charging stations of Switzerland. This method has a significant applications in the energy efficient route planning algorithms where it will be cost savings for customers by avoiding the waste heat, overall contributing to environmental sustainability.