Regeneration Calibration for Optimum Range and Effective Brakes Performances in eSUV

Regenerative braking is an effective approach for electric vehicles (EVs) to extend their driving range. To enhance the braking performances and regenerative energy, regenerative braking control strategy based on multi objective optimization is explained in this paper. This technical paper would be focusing on extracting optimum Range with effective brake performances without affecting drivability and performances in different drives modes. An extensive research study on public road driving patterns is done to understand the percentage utilization of brakes at various (low-mid-high) speeds as per the customer driving behavior. Multi-Objective optimization function with three vital factors is defined where output generated power, torque smoothness and current smoothness are selected as optimization objective to improve the driving range, braking comfort, and battery lifetime respectively. Braking regeneration maps are calibrated along with optimized foundation brake hardware’s to get the optimum range without affecting the brake performances. Ranges tests are conducted on chassis dynamometer with various drive cycles and optimized calibration showed the improved results on range without affecting the braking and acceleration performance feel.