【作者】 杨鹏；

【导师】 李志强；

【作者基本信息】 电子科技大学 ， 控制工程（专业学位）， 2016， 硕士

【摘要】 在全世界大力发展新能源的背景下,电动汽车的推广普及程度越来越大。动力电池是电动汽车尤其是纯电动汽车能量的主要载体,其性能的优劣直接影响了电动汽车的性能。关于电动汽车动力电池的研究工作也越来越受到行业的重视。电池的性能在不断地提升,对电池测试的相关技术要求也越来越高。针对电动汽车使用的动力电池的测试问题,本文以电池的等效模型和电动汽车动力性能分析为依据,并基于对电池模型的分析和电池的SOC的估算以及电动汽车动力性能仿真的研究设计开发了大功率动力电池测试分析软件系统。主要研究内容如下:(1)本文通过HPPC实验对模型的参数进行了辨识,根据锂电池模型和电池荷电状态SOC定义,以SOC作为被估计参数研究了基于扩展卡尔曼滤波算法的SOC的估计方法,并验证了基于Thevenin电池模型的SOC估计效果。此外,基于Thevenin电池模型和SOC计算方法实现了模拟电池充放电的功能,并通过模拟电池的充放电实现对电池性能的测试。(2)目前,电动汽车仿真软件侧重于对车辆的仿真而缺少对电池测试的支持或满足不了电池测试研究的需要,而电动汽车所用的动力电池在进行模拟汽车行驶工况下的测试时又常常需要真实车辆实际运行来获取数据,不仅成本高、周期长,而且通过不同道路状况和驾驶策略获得的数据差异性较大。本文将基于Matlab下开发的电动汽车仿真软件ADVISOR与电池测试技术相结合,既保持了电动汽车仿真软件的可靠和专业的优点,又体现了电池测试的针对性。两者的互补结合为动力电池测试分析提供了一个低成本、高效率的思路。此外本文采用了系统工程中的层次分析法对电动汽车的动力电池进行性能评价。(3)本文最后测试验证了系统的各个功能,并通过连接硬件模块验证了本系统功能的有效性和可靠性。测试结果表明,整个系统能够稳定运行,系统功能符合系统的设计要求,满足了动力电池测试的需要。更多还原

【Abstract】 In the context of the world to develop new energy, the popularization of electric vehicles is becoming more and more popular. The power battery is the main carrier of the energy of the electric vehicle, especially the pure electric vehicle, and its performance directly affects the performance of the electric vehicle. More and more attention has been paid to the research of the electric vehicle power battery.The performance of the battery is constantly improving, and the requirements of the battery related testing technology is also getting higher and higher. Aiming at the test problem of power battery used in electric vehicle, this paper designs and develops a software system for testing and analyzing high power battery based on the analysis of the battery model and the estimation of the SOC of the battery and the simulation of the dynamic performance of the electric vehicle. The main research content of this paper are as follows:(1) In this paper, the parameters of the model are identified by HPPC experiments. According to the SOC definition of the lithium battery model and the state of charge of the battery, the estimation method of SOC based on EKF is studied with SOC as the estimated parameter, and the effect of SOC estimation based on Thevenin battery model is verified. In addition, based on the Thevenin battery model and the SOC calculation method, the function of analog battery charging and discharging is realized, and the performance of the battery is tested through the simulation of the battery charge and discharge.(2) At present, the electric vehicle simulation software focuses on the simulation of the vehicle and the lack of support for the battery test or can not meet the needs of the battery test research. In addition, Electric vehicle power battery for simulation of automotive driving test conditions often need real vehicle operation to obtain the data, not only the high cost, cycle is long, and the different road conditions and driving strategy obtained data is large difference. The combination of battery testing technology and ADVISOR which is developed in the MATLAB platform is a significant characteristic of this system. Both the reliability and professional advantages of the electric vehicle simulation software are maintained, and the pertinence of the battery test is also reflected. The complementary combination of the two provides a low cost and high efficiency idea for test and analysis of power battery. In addition, this paper uses AHP of system engineering to evaluate the performance of the power battery of electric vehicle.(3) This article finally has carried on the system testing, including the module test and by adding hardware platform to verify the system’s accuracy and practicality. The test results show that the whole system can run stably, and the system function meets the design requirements of the system, which meets the needs of the power battery test.更多还原