Energy management strategy of plug-in hybrid electric vehicle based on system comprehensive efficiency optimization

doi:10.3969/j.issn.1674-8484.2021.01.009

Abstract

Abstract:

A energy management strategy for a plug-in hybrid electric vehicle (PHEV) power system was investigated according to the optimal overall energy efficiency to improve the true energy efficiency of a power system of PHEV. A system efficiency evaluation model was established to evaluate and dynamically modify the efficiency of a battery storage of electric energy aiming at the time-varying and coupling of the system's overall efficiency. A energy management strategy was constructed with the goal of optimal system overall efficiency and particle swarm optimization algorithm. The application effect of the energy management strategy was analyzed based on the GT-Suite and Simulink joint simulation platform. The results show that the optimized engine and motor operating conditions are more reasonable compared with the energy management strategy, which does not consider comprehensive energy efficiency, under two consecutive “Worldwide Harmonized Light Vehicles Test Cycles (WLTC)”; The comprehensive energy consumption is reduced by 10.6%; The distribution of the optimized engine and motor operating conditions is more reasonable; The system energy consumption is effectively reduced under different working conditions. Therefore, the energy management strategy improves the energy efficiency of plug-in hybrid power systems.

Key words: plug-in hybrid electric vehicles(PHEV), energy management strategy, overall system efficiency, efficiency evaluation function, particle swarm optimization

CLC Number:

U469.7

TONG Shengwen, CHEN Tao, XIE hui. Energy management strategy of plug-in hybrid electric vehicle based on system comprehensive efficiency optimization[J]. Journal of Automotive Safety and Energy, 2021, 12(1): 91-99.

Figures/Tables 12

References 16

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整备质量		2.081 t
发动机, eng	排量	2.0 L
	最大功率	140 kW
	最大扭矩	325 Nm
电机2, e1	最大功率	53 kW
	最大扭矩	163 Nm
	最大转速	17 000 r/min
电机1, e2	最大功率	23 kW
	最大扭矩	100 Nm
	最大转速	10 000 r/min
行星排特征参数,K		2.630
MG2减速比,i₁		3.117
齿圈减速比,i₂		0.815
主减速比,i₀		3.947

整备质量		2.081 t
发动机, eng	排量	2.0 L
	最大功率	140 kW
	最大扭矩	325 Nm
电机2, e1	最大功率	53 kW
	最大扭矩	163 Nm
	最大转速	17 000 r/min
电机1, e2	最大功率	23 kW
	最大扭矩	100 Nm
	最大转速	10 000 r/min
行星排特征参数,K		2.630
MG2减速比,i₁		3.117
齿圈减速比,i₂		0.815
主减速比,i₀		3.947

初始电量/ %		能耗 / kWh
初始电量/ %		WLTC	NEDC
60	优化前	32.76	13.28
60	优化后	29.29	11.62
80	优化前	29.85	9.70
80	优化后	27.52	8.74

初始电量/ %		能耗 / kWh
初始电量/ %		WLTC	NEDC
60	优化前	32.76	13.28
60	优化后	29.29	11.62
80	优化前	29.85	9.70
80	优化后	27.52	8.74