Battery Electric Vehicle Energy Consumption and Range Test Procedure J1634_202104

DOI: https://doi.org/10.4271/J1634_202104

Issuing Committee: Light Duty Vehicle Performance and Economy Measure Committee

Publisher: SAE International

Pages: 61

Rationale: Battery electric vehicle (BEV) technology has continued to progress since SAE J1634 was revised to include the multi-cycle test (MCT). BEV driving ranges and capabilities continue to increase along with the addition of many new BEV models in the marketplace, further taxing lab testing. In order to reduce lab test burden, a short multi-cycle test (SMCT) is introduced to allow longer range BEVs to perform a fixed distance test in approximately 50% of the dynamometer time of an MCT test, while achieving comparable range and energy consumption results. This method utilizes an off-board discharge process to determine remaining energy in the battery pack. A short multi-cycle test plus steady state (SMCT+) is also introduced to provide driver flexibility for longer range BEVs to perform testing for range, energy consumption, and five-cycle test data simultaneously without the need for additional off-board discharge equipment. Single-cycle test (SCT), MCT, SMCT, SMCT+, and BEV five-cycle testing (Appendix B) have also been amended to allow thermal conditioning prior to driving, a desired customer feature in today’s BEV marketplace to improve vehicle range.