Reduction in Chassis Dynamometer Test Time for Evaluating Energy Economy and Range of Light-Duty Battery Electric Vehicles

Abstract

In response to the climate crisis, nations are working to reduce emissions and improve energy efficiency, particularly in the transportation sector through the adoption of electric vehicles. However, the current official test methods for evaluating battery electric vehicle (BEV) energy economy and single-charge driving range are time-consuming, creating challenges for testing institutions and delaying the release of new models. The objective of this study is to compare the energy economy and single-charge driving range of BEVs using the different test methods, the full depleting test (e.g., multi cycle test (MCT), short multi cycle test, short multi cycle test plus) and partial depleting test (e.g., short process test (SPT)), with the aim of reducing the testing time on the chassis dynamometer. As a result of testing with three BEVs with different battery capacities, the test duration on the chassis dynamometer could be reduced by up to 85% compared to the MCT that is authorized test method by government. Each test has different repeatability, and SPT has a higher deviation from the MCT test results than other test methods. Overall, the study can provide reliable research outcomes conducive to the future improvement of official energy economy and single-charge driving range test standards for BEVs in each country.