Integrated Scheme of Charging/discharging for Parking Multi Energy Sources Electric Vehicles Based on Wide Voltage-gain Range Bidirectional DC-DC Converters

doi:10.11985/2022.02.012

Abstract

Abstract:

In order to solve the problem of low input voltage range and low utilization ratio of vehicle converter and energy management system, an integrated vehicle parking charging and discharging scheme is proposed in this paper. Compared with the conventional electric vehicle charge and discharge technology, this scheme not only realizes the energy interaction between the vehicle hybrid energy sources and the vehicle DC bus and micro-grid, providing the possibilities for peak load shifting for the connected DC micro-grid, but also reduces the charging voltage level of the electric vehicle charger. Last but not least, this scheme also greatly broadens the vehicle power battery charging method and maximizes the utilization of the vehicle converter, vehicle energy management system and power motor. Finally, an experimental platform of 1.2 kW hybrid energy sources charging and discharging system is built, which verifies the rationality and feasibility of the integrated parking charging and discharging scheme, so the scheme proposed in this paper can be further popularized and realized in the field of electric vehicle charge and discharge technology research in the future.

Key words: Wide gain, bidirectional DC-DC converter, hybrid energy sources, parking charge and discharge, integration

CLC Number:

TM561

ZHANG Yun, WEI Yihang, LIU Qiangqiang, KONG Zhiguo. Integrated Scheme of Charging/discharging for Parking Multi Energy Sources Electric Vehicles Based on Wide Voltage-gain Range Bidirectional DC-DC Converters[J]. Journal of Electrical Engineering, 2022, 17(2): 101-109.

Figures/Tables 16

References 18

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拓扑	电压增益	功率开关数量	电感数量	功率开关电压应力
共地非对称 H桥拓扑	$\frac{1}{1-(d_{2}+d_{4})}$	4	1	U_h
交错开关电容拓扑	$\frac{1}{1-d}$	5	2	$\frac{U_{h}}{2}$

项目	试验条件或参数
给定直流母线电压	U_{DC_bus}=400 V
电池组	U_bat=48 V 磷酸铁锂电池,20 A·h,80% 初始电量
超级电容组	4节CSDWELL MODWJ001PM031Z2 230F 40 V 初始电压
开关频率	f_s=20 kHz
DSP控制器	TI-TMS320F28335
功率开关	IXTK102N30P MOSFET
母线功率	400~600 W间阶跃
两侧宽增益双向DC-DC变换器	共地非对称H桥宽增益范围双向DC-DC变换器和开关电容宽增益范围双向DC-DC变换器

	电池容量	电池电压/V	峰值电流/A	峰值功率/ kW	平均功率/ kW
试验平台	20 A·h	48	25	1.2	0.600
电动汽车	70 kW·h	400	300	120	70