【作者】 李国洪；

【导师】 刘鲁源；

【作者基本信息】 天津大学 ， 电力电子与电力传动， 2005， 博士

【摘要】 能源危机和环境污染是当今世界可持续发展所面临的两大根本问题,混合动力汽车在技术、经济和环境等方面具有综合优势,是目前缓解这两个问题的有效途径。完善混合动力系统控制策略是提高燃油经济性和减少污染排放的重要手段,而动力电池的性能测试及电池管理系统是混合动力汽车的重要组成部分。基于并联结构的分布式XL2000混合动力轿车控制系统,依据驾驶员需求划分了混合动力轿车的五种运行模式,构建了模式切换图;根据整车控制目标要求,提出了基于发动机万有特性参数及遵循车辆驱动优先、动力电池能量维持、再生制动最大能量回收三个原则的转矩管理策略;搭建了混合动力轿车系统模型,进行了控制策略仿真。把传统汽车的速度跟踪控制引入到混合动力汽车控制中,根据转矩管理策略把混合动力汽车的目标转矩分配为发动机和电机的目标转矩,实现了发动机和基于MAP图的电机逆转矩控制,妥善处理了电机和发动机混合驱动问题,达到速度跟踪控制的目的。从混合动力汽车的实际需求出发,以C8052F020和MC68HC908GZ16单片机作为控制系统核心,组成上下位机测控系统,实现了电池管理系统的硬件、软件和CAN总线设计。在分析动力电池在混合动力汽车行驶时的充放电工作过程的基础上,建立了一种镍氢动力电池等效电路及其动力电池的参数模型,提出了基于稳态开路电压和状态空间的SOC动态估算方法。设计了基于工控机和RS485总线的包括温度巡检仪、电压巡检仪、充电设备、放电设备的分布式动力电池性能测试系统,提出了恒流放电、恒电阻放电和恒功率放电算法,通过控制与动力电池相连的多路大功率场效应管的通断,利用PWM脉宽调制原理调节放电电流,覆盖了放电电流的调节范围,从而实现动力电池的放电控制,为模拟电动汽车行驶工况下的动力电池工作过程构建了实验环境。更多还原

【Abstract】 Energy shortage and environment pollution are two serious problems that can prevent the world from developing forward rapidly. In this case, HEV’s(hybrid electric vehicle) are the key to solve the problems. It has advantages in many fields, such as technology, economy and environment. To improve on the control strategy design of HEV is an important way to enhance fuel efficiency and reduce pollution emission. The traction battery performance testing and management system are two important parts of HEV’s.In this thesis, According to the driver’s requirements and the distributed control system based on parallel structure for XL2000 HEV, five operation modes are defined and mode changing figure of the HEV is built. In the system, based on control requirement for the vehicle, the torque management strategy on the engine and motor is proposed according to the characteristic parameter and the three principles which include vehicle drive first, traction battery energy keeping, regenerative brake energy reuse. Based on the HEV, the control system model is built and the control strategy is simulatedIn the control of HEV, traditional tracking speed technology is used. According to the torque management strategy, the target torque is distributed to the engine and the motor, and the inverse torque control is implemented on engine and motor based on MAP to resolve the issue of the combination drive of the motor and the internal combustion engine. Thus the speed tracking control is achieved.For the requirements of the practical application, C8051F020 and MC68HC908GZ16 form the test and control system as control core in major- server structure. At the same time, the related hardware, software for the battery management system and CAN bus are designed. Moreover, on the basis of the analyzing the charging and discharging process of traction battery in running electric vehicles, a equivalent electric circuit of Ni-MH battery and its parameter model are proposed in detail. And a method to estimate SOC dynamically based on stable open voltage and state space is also proposed.The distributed traction battery performance test system is designed which include temperature tester including measure point, voltage tester including many batteries, charging device and discharging device based on industrial computers and RS485.Thealgorithms of constant current discharging, constant resistance discharging and constant power discharging are designed. Traction battery discharging control is realized by controlling power MOSFET connect or break which connect to the traction battery. Using PWM impulse modulation theory to adjust the discharging current enlarge the current regulation range. All this work built the experiment environment to simulate the traction battery working in the running hybrid electric vehicles.更多还原