電動汽車復合電源系統仿真研究

摘要：當前，電動汽車用蓄電池的比能量和比功率還不能達到理想的要求，將超級電容引入到電動汽車的儲能系統中，構建超級電容—蓄電池復合電源系統，利用超級電容高功率密度特性彌補蓄電池的不足。綜合考慮運用兩種儲能系統的優缺點，解決了電動汽車續駛里程與加速爬坡性能之間的矛盾。在MATLAB/Simulink 環境下對復合電源系統中重要模塊進行仿真，測試結果顯示，采用超級電容—蓄電池的復合電源系統能發揮其高能量密度和高功率密度特性，從而提高車輛的動力性能和能量利用率。 敘詞：復合電源，超級電容，能量管理，DC/DC，變換器 Abstract：At present, the electric car battery specific energy and specific power can not achieve the ideal requirements. In this study, ultracapacitor was applied to the energy storage system in battery electric vehicle to form a multiples energy supply system of ultra capacitorand battery to make use of high power density characteristics of ultra capacitor to overcome the battery deficiency, Considering theadvantages and disadvantages of the two energy storage system, resolve the contradictions among Electric Vehicle mileage, accelerationand climbing performance. The simulation results show that the ultra capacitor-battery composite power system can play a high energydensity and high power density characteristics, thereby the vehicles dynamic performance and energy utilization can be enhanced. Keyword：Compound power supply, Energy management, Ultra capacitor, DC/DC Converter