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Energy Recovery of Electric Vehicle Base on NEDC Cycle
LI Riye
2021, 46(24):
1-4.
DOI: 10.16638/j.cnki.1671-7988.2021.024.001
With the popularization of pure electric vehicles, the public has a clearer understanding of the
concept of energy recovery. Taking a brand of pure electric MPV under NEDC cycle as an example, this
paper expounds the difference and influencing factors between theoretical recoverable energy and actual
recoverable energy, and carries out vehicle measurement by adjusting the energy recovery control strategy
of the whole vehicle, so as to provide reference for the control strategy of pure electric vehicle energy
recovery and energy consumption reduction. Through statistical analysis of the data characteristics of
typical working conditions with large acceleration, uniform speed and deceleration stages of NEDC cycle,
the NEDC cycle is divided into 36 operation sequences. At the same time, according to the mechanical
作者简介：李日业，就职于福建新龙马汽车股份有限公司。
2 汽 车 实 用 技 术 2021 年 formula of the vehicle and the electric control efficiency of the motor, it is calculated that the recoverable
electricity generated by the deceleration condition theoretically accounts for 18.6% of the total energy
consumed under the condition. By adjusting the energy recovery control strategy of the whole vehicle, the
deceleration generated during vehicle energy recovery is adjusted to be close to the deceleration under
NEDC cycle conditions. At the same time, the vehicle is placed in the environmental chamber. The driving
range and energy consumption of the vehicle without energy recovery and with energy recovery are tested
respectively according to NEDC cycle conditions. The test results show that the driving range of the
vehicle is increased from 281.3 km to 329.3 km, energy recovery will increase the mileage of 48 km. The
power consumption of vehicles without energy recovery is 44.4 kWh, the power consumption of 100km is
about 15.69 kWh, and the corresponding power consumption of 48 km is 7.53 kWh, accounting for 16.96%
of the total power consumption without energy recovery, which is close to the theoretical value. Under the
condition that the efficiency of motor electronic control and other systems remains unchanged and the
internal resistance of the vehicle remains unchanged, when defining the energy recovery strategy, the
energy recovery rate can be improved by adjusting the deceleration generated during vehicle energy
recovery to be close to the deceleration under NEDC cycle.
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