Abstract: The operation mode of a dualmotor integrated battery electric vehicle is optimized with minimizing its energy consumption as objective. A simulation using China city bus cycle is conducted with four power distribution strategies, i.e. optimizationbased dynamic programming (DP) strategy and instantaneous consumption minimization strategy (ICMS), and rulebased symmetric torque (ST) distribution strategy and mainauxiliary (MA) motor torque distribution strategy respectively. The results of simulation indicate that for dualmotor integrated battery electric vehicle, DP, as a global optimization strategy, tends to be degenerated into ICMS, meaning that ICMS should be the best scheme of operation mode distribution for dualmotor integrated battery electric vehicle, and the electricity consumption per 100km with DP/ICMS strategy is 507 and 229kW·h less than that with ST and MA strategy respectively.

Key words: dual motor integrated system, power distribution, dynamic programming, instantaneous optimization, symmetric torque distribution, mainauxiliary torque distribution