The Study of Effective Regenerative Brakes on Battery Electric Vehicles

The regenerative brake system is a standard to increase hybrid or battery-electric vehicles’ range per charge period. According to some research, the system can extend up to 16% of the range [1]. There are several studies on different configurations or strategies of control to improve the efficiency of regenerative brakes. Most of them use specifications from hybrid or battery electric vehicles that have a gross weight of more than 1 ton [2, 3]. More and more mini-battery electric vehicles have been introduced around the world, including in Vietnam. Therefore, the combination of regenerative and mechanical brakes on mini-battery electric vehicles that use low-power motors and batteries needs more consideration. This paper presents research on effective regenerative brakes on mini-battery electric vehicles (gross weight lower than 1 ton) equipped with BLDC motors in different conditions (initial SoCs and accelerations). The simulation on MATLAB Simulink showed that the efficiency can reach 24% per braking period under special brake conditions.