Influence of Test Cycles on Energy Consumption Test of Electric Vehicles

Yu Liu,Xiaopan An,Kunqi Ma,Hanzhengnan Yu,Jingyuan Li,R.J Dick Haynes

doi:10.1051/e3sconf/202124102004

Abstract

In order to verify the necessity of the application of China Automotive Test Cycle which is constructed through actual driving data in china of more than 55 million kilometers in the energy consumption test of electric vehicles in China, this paper compares the characteristics of New European Test Cycle (NEDC), World-wide harmonized Light duty Test Cycle (WLTC) and China light-duty vehicle test cycle for passenger car(CLTC-P), and analyzes the differences of vehicle energy demand under different test cycles from theoretical and simulation point, simulation results show that the endurance mileage is longest and the energy recovery strategy is more effective under CLTC-P cycle. Finally, four types of vehicles are selected to carry out the endurance mileage test under these three test cycles. The test results are consistent with the simulation results. Therefore, in order to make the test results of electric vehicle energy consumption closer to the actual use of our country, CLTC-P should be selected to replace NEDC and WLTC cycle.

Highlights

In recent years, with the rapid development of China's electric vehicle market, the official endurance mileage of electric vehicles is getting larger and larger
The curves and the speed distribution of the three test cycles are shown in Figure 1 and Figure 2, and the main characteristics of the three test cycles are shown in Table 1.The main differences can be attributed to the following aspects: Firstly, compared with NEDC cycle, wide harmonized Light duty Test Cycle (WLTC) and CLTC-P are transient test cycles, and all motion segments and idle segments are from actual road test data
In order to verify the impact of test cycle on electric vehicle energy consumption, this chapter calculated the energy requirements of a certain light electric vehicle under NEDC, WLTC and CLTC-P test cycle, and the difference is analysed from the point of vehicle dynamics

Summary

Introduction

With the rapid development of China's electric vehicle market, the official endurance mileage of electric vehicles is getting larger and larger. China has become the largest market of new energy vehicles in the world[3], the test standards of electric vehicles need to be further improved. With the rapid growth of car ownership and the constant change of actual road in our country, the difference between NEDC test cycle and China Automotive Test Cycle is increasingly significant. In order to verify the necessity of application of China Automotive Test Cycle, this paper will analyze the influence of different test cycles on electric vehicle energy consumption from theoretical analysis, simulation and test

Characteristics of different test cycles

Comparison of energy consumption under different test cycles

Simulation of endurance mileage under different test cycles

Test comparison

Findings

Conclusions