【作者】 张靖；

【导师】 过学迅；

【作者基本信息】 武汉理工大学 ， 车辆工程， 2005， 硕士

【摘要】 混合动力汽车已经成为解决环境污染和能源短缺最具市场的车型。许多国家和政府部门、汽车公司和零部件厂商都投入巨资进行混合动力汽车的研究开发以及关键技术研究,目前已有多种产品问世。混合动力电动汽车的最大优点就是可以利用车载电能储存装置对整车制动时的动能加以回收,这部分能量还可以用于汽车驱动,使整车燃油经济性提高。但由于受到电池性能因素的制约,使得整车制动能量回收效能不佳,同时电池寿命有限,使得整车全寿命使用费用增加。电池技术成为制约混合动力汽车发展的关键技术。 超级电容是一种新生电源,具有充电迅速,效率和使用循环次数高,短时间内放电能量高的优点。国外已经有越来越多的汽车厂把超级电容器作为混合动力汽车的储能装置。本文研究内容作为解决混合动力汽车电源技术的初步探索,分析了蓄电池和超级电容组成的复合系统的性能优势,并对其进行了仿真研究。 本论文的重点是:提出复合电源的组成结构,在HEVSim平台上,建立超级电容和DC/DC模型,以保护电池为原则,提出了复合电源的控制策略。第二章中分析了当前蓄电池的发展现状和优缺点,介绍了超级电容的储电原理以及在电动汽车上的应用现状,提出了复合电源结构,优势和可行性;在第三章中,分析了目前各种电动汽车仿真软件,着重介绍了自主仿真平台HEVSim;第四章和第五章中,对复合电源各个组成元件:电池,电容,DC/DC转换器进行了分析并建立了相应模型,按照滤波思想提出了复合电源的控制策略;在第六章中,针对并联混合动力整车构型方式,选定参数进行了仿真,对仿真结果进行了分析。对应用复合电源系统的并联混合动力车进行了仿真研究,仿真结果表明,由于超级电容在汽车加速时释放能量,制动时回收能量,避免了电池的大电流充放,对电池起到了保护作用,并具有提高制动回收能量的优势。更多还原

【Abstract】 Hybrid electric vehicle has being the most approachable way to solve the problem of energy source shortage and environment pollution. Development of new type motor vehicle with low energy consumption and emission is being under-way by automobile industry and research institute, which is encouraged by government policy. One of the merits of EV/HEV is the regenerative braking, but battery is still the threshold of the HEV because of the low energy density and short life.In the past few years , The ultracapacitors, however new, are an attractive option in hybrid vehicles due to their high power density, long lifetime, and high efficiency during discharge and re-charging. Ultracapacitors have already found application in the propulsion system of HEV as well as fuel cell vehicles. In this paper the application of ultracapacitors as distributed energy storage buffers in the vehicles electrical system is investigated and modeled.This paper focuses on hybrid electric power system composed of batteries and ultracapacitors. The main work of this paper is the modeling and simulation of the system components and the control strategy. In chapter 2, the characteristics of battery and ultracapacitor are investigated. And the applications of ultracapacitor on HEV nowadays are introduced. Then the hybrid electric power system is bringing forward. The HEV simulating software HEVSim that is developed by us is introduced in chapter 3. The models of battery, ultracapacitor, and DC/DC converter, which compose the hybrid electric power system, are introduced in chapter 4, and then the control strategy of the hybrid electric power system in chapter 5. In chapter 6, a PHEV using the hybrid power system is simulated. From the results of the simulation, the pulse current is cut off, the energy recovered by the regenerative braking is improved, and than, the life of the battery is increased.更多还原