基于纯电动汽车的双输入双向DC/DC变换器设计

Design of double input-bidirectional DC/DC converter based on blade electric vehicles

由于目前复合电源系统中只用一个单输入DC/DC变换器存在稳定性差,蓄电池使用寿命短的现象,而使用两个单输入DC/DC变换器又存在结构复杂、可靠性差的缺陷.因此设计了一种基于纯电动汽车的双输入双向DC/DC变换器,该变换器通过将蓄电池、超级电容作为双输入电源接入其中,使二者的输出电压更加稳定,有效地保护了蓄电池,延长了其使用寿命.同时,只使用一个DC/DC变换器使系统结构得到简化,提高了可靠性.对所提出的DC/DC变换器在纯电动汽车不同工况下的工作情况进行了分析,最后通过Matlab/Simulink进行了仿真验证,结果表明所提出的DC/DC变换器能够满足电动汽车的要求.

As the complex power systems using only a single input DC/DC converter are of poor stability, short service life of battery, and those systems using two single input DC/DC converter exist defects of complicated structure and poor reliability, this paper designs a double input-bidirectional DC/DC converter based on blade electric vehicles. The converter take the battery and super capacitor as a double input power, which makes the output voltage more stable, and protects the battery and prolongs its service life. And, the use of a single DC/DC converter makes system structure more simplified and reliable. In addition, the paper analyzes the working condition of the DC/DC converter under the different conditions. At last, the simulation is conducted with Matlab/ Simulink, which shows that the DC/DC converter can meet the requirements of blade electric vehicles.