A Hybrid Cascaded Multilevel Converter for Battery Energy Management Applied in Electric Vehicles
A Hybrid Cascaded Multilevel Converter for Battery Energy Management Applied in Electric Vehicles
复制标题
一种用于电动汽车电池能量管理的混合级联多电平转换器
DOI：
10.1109/tpel.2013.2279185
复制
发表时间：
2014-07
影响因子：
6.7
通讯作者：
Li, Yongdong
中科院分区：
文献类型：
--
作者：
Zheng, Zedong;Wang, Kui;Xu, Lie;Li, Yongdong
在电动汽车储能系统中，通常将大量的电池单元串联以提高输出电压用于驱动电机。由于电池电化学特性的差异，会导致电池的荷电状态和端电压不平衡。本文提出了一种混合级联多电平变换器，它涉及到电池能量管理和电机驱动电动汽车。在所提出的拓扑结构中，每个电池单元可以被控制为连接到电路中或被半桥转换器旁路。所有半桥级联输出阶梯形直流电压。然后，一个H桥转换器被用来改变直流母线电压的方向，以弥补交流电压。该变换器的输出为谐波少、dv/dt低的多电平电压，有助于提高电机驱动系统的性能。通过根据每个电池的SOC单独控制，可以提高电池的能量利用率。该方法还可以避免端电压和SOC的不平衡，通过模块化的级联电路可以很容易地实现容错，从而延长电池堆的寿命。仿真和实验验证了该变换器的性能。
In electric vehicle (EV) energy storage systems, a large number of battery cells are usually connected in series to enhance the output voltage for motor driving. The difference in electrochemical characters will cause state-of-charge (SOC) and terminal voltage imbalance between different cells. In this paper, a hybrid cascaded multilevel converter which involves both battery energy management and motor drives is proposed for EV. In the proposed topology, each battery cell can be controlled to be connected into the circuit or to be bypassed by a half-bridge converter. All half-bridges are cascaded to output a staircase shape dc voltage. Then, an H-bridge converter is used to change the direction of the dc bus voltages to make up ac voltages. The outputs of the converter are multilevel voltages with less harmonics and lower dv/dt, which is helpful to improve the performance of the motor drives. By separate control according to the SOC of each cell, the energy utilization ratio of the batteries can be improved. The imbalance of terminal voltage and SOC can also be avoided, fault-tolerant can be easily realized by modular cascaded circuit, so the life of the battery stack will be extended. Simulation and experiments are implemented to verify the performance of the proposed converter.
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影响因子：
7.7
作者：
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通讯作者：
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作者：
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通讯作者：
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