【作者】 刘超；

【导师】 王立欣；

【作者基本信息】 哈尔滨工业大学 ， 电力电子与电力传动， 2007， 硕士

【摘要】 混合动力电动车(HEV)作为新一代的节能汽车,已经越来越多地受到了各国政府的重视。本课题主要研究的就是混合动力电动车车载快速充电系统。本文分析了国内外混合动力电动车的发展态势以及车载快速充电系统的发展现状。针对目前存在的不同种类的蓄电池进行了介绍,并最终选取了铅酸蓄电池作为本科题的研究对象。通过分析了解了铅酸蓄电池内部结构、化学反应机理、充电过程及几个比较重要的蓄电池特性参数。介绍了铅酸蓄电池极化现象的定义及分类。并研究了不同极化现象对于蓄电池充电过程的影响,确定了去极化现象所应该遵循的原则。本文通过对快速充电理论——马斯三定律的分析,确定了以多段恒流与脉冲充电相结合的新型脉冲充电策略。对系统的硬件设计实现做了详细的介绍。并通过MATLAB仿真软件进行了仿真实验,最终结果验证了理论计算的正确性,并指导了实际硬件的设计过程。另外,对系统软件的实现方法也进行了全面的介绍,主要包括主程序的实现、快速充电子程序的实现、滤波程序的实现以及判断充满子程序的实现。本文实现了车载快速充电系统的整体设计。对PWM整流电路功能测试的结果表明PWM整流电路能够完成脉冲快速充电策略的需要。通过实验的方法确定了放电电流大小、放电时间、前停充时间等脉冲充电参数。最终将整体充电策略测试结果与其他几种传统充电策略结果进行对比。实验结果表明整个快速充电系统可以实现快速、高效、绿色地给蓄电池进行充电。更多还原

【Abstract】 As the new generation of energy conservation vehicle, the hybrid electrical vehicle (HEV) has been concerned by every countries’government. The principal task of this paper is to research and design a fast recharge system used on HEV.This paper analyses the research status of HEV and fast charge system used on HEV. Describes different kinds of rechargeable batteries according to the exist situation, and picked the lead acid battery as its research object. Through the analysis we get the interior structure, the mechanism of chemical reaction and the charge process of the lead acid battery, and we also get some other important characteristics of the battery. In addition, this paper described the definition of polarization phenomena and its catalogues. After learnt how the polarization phenomena affect the process of battery charge, the paper sets certain funda-mental to be obeyed when avoiding the polarization phenomena.Subsequently, this paper analyzed the principal law for fast charge– the three law of Mass and through the analyses it concluded a new charge strategy that based on both multiple current charge strategy and pulse charge strategy which is called the new type pulse charge strategy. Also we particularly described how to realize the hardware. These calculate process has been proved true and correct by the simulation result using MATLAB, and gives a specific direction. Otherwise this paper full-scale described the realization of system software mainly including the main program, the fast charge subprogram, the digital filter subprogram and the full judge subprogram.Finally, we made out the fast recharge system used on HEV. The results of PWM rectifier characteristic test indicated that it can satisfy the fast recharge require. Also the best compounding of the parameters like discharge current, discharge time, front discharge time etc. are ascertained by a sort of experiments. In the end, the result of the new fast charge strategy is compared to the other three kinds of traditional charge strategies, the compare result indicated that the new strategy can improve the charge efficiency, shorten the charge time and will not emit any poison gas through the charge process.更多还原