基于虚拟仪器的纯电动大客车高压电气系统安全监测方法研究

发布时间：2018-09-19 14:27

【摘要】：近几年,人们对汽车需求逐年提高,汽车的销量也是连年攀升。与此同时,人们对于能源和环境的关注度也随之提升。汽车给环境和能源带来的问题,也逐渐受到人们的重视。在这种形势下,纯电动汽车逐渐走进了人们的视野,并逐渐引起了人们的关注。纯电动汽车相比较传统汽车而言,由于其自身不是依靠汽油燃烧而产生动力,而是依靠电能,因此纯电动汽车在行驶的过程中,可以真正意义上实现“零排放”。但是,相比较传统汽车,纯电动汽车由于其电气化程度高,并且高压电气设备的数量也要比传统汽车多。这样,纯电动汽车的高压电气安全问题就成为了一个不可忽视的问题。当车辆的高压电气出现问题时,如果可以及时发现,则可以减少不必要的损失。同时,也可以保证车辆的行驶性能,延长车辆的使用寿命。因此,及时了解纯电动汽车的高压电气状况,对纯电动汽车的安全来说是十分必要的。本文研究内容主要包括以下几个方面:1.通过查阅文献资料,对纯电动客车的高压电气系统的结构和工作原理进行分析,确定安全监测系统的监测对象。2.基于高压电气元件的规格参数以及《GB/T18384.1-2001电动汽车安全要求》,确定以输入输出电压、输入输出电流以及部件温度作为高压电气系统及各关键部件的监测参数,并确定安全范围。3.为确保车辆动态运行时高压电气系统的绝缘安全性。基于直流差流法,通过漏电流传感器来实现对纯电动大客车高压电气系统绝缘性能的监测。4.深入了解传感器原理,完成对监测系统中电压传感器、电流传感器、温度传感器的选型。并对监测系统的其他硬件进行选型和设计。5.监测系统包括两部分。硬件部分,监测系统通过数据采集卡、电压传感器、电流传感器以及温度传感器实时获得纯电动汽车电池系统、驱动电机系统以及高压辅助系统的运行状态;软件方面,利用虚拟仪器软件Lab VIEW2014搭建纯电动客车电气安全监测平台,并可以实现实时报警及故障诊断。6.利用实车实验获取实验数据,对基于虚拟仪器的纯电动汽车高压电安全监测系统的实用性和可靠性进行验证。
[Abstract]:In recent years, people's demand for automobiles has increased year by year, and the sales of automobiles have also increased year by year. At the same time, people's attention to energy and environment has also increased. Compared with traditional automobiles, pure electric vehicles (EVs) rely on electric energy instead of gasoline to generate power, so EVs can achieve zero emission in the process of driving. However, compared with traditional automobiles, EVs have a higher degree of electrification, and they also rely on electric energy. And the number of high-voltage electrical equipment is more than that of traditional automobiles. Thus, the high-voltage electrical safety of pure electric vehicles has become a problem that can not be ignored. Therefore, it is very necessary for the safety of pure electric vehicle to know the high voltage electrical condition of pure electric vehicle in time. This paper mainly includes the following aspects: 1. Through consulting the literature, the structure and working principle of high voltage electrical system of pure electric bus are analyzed, and the safety monitoring system is determined. 2. Based on the specifications of high voltage electrical components and , the input and output voltage, input and output current and component temperature are determined as the monitoring parameters of the high voltage electrical system and the key components, and the safety range is determined. 3. To ensure the dynamic operation of the vehicle, the high voltage electrical components are determined. Insulation safety of the system. Based on DC differential current method, leakage current sensor is used to monitor the insulation performance of high voltage electrical system of pure electric bus. 4. Understand the principle of the sensor deeply, complete the selection of voltage sensor, current sensor and temperature sensor in the monitoring system, and select other hardware of the monitoring system. And design. 5. The monitoring system includes two parts. Hardware part, monitoring system through data acquisition card, voltage sensor, current sensor and temperature sensor real-time access to pure electric vehicle battery system, drive motor system and high-voltage auxiliary system running state; software, using virtual instrument software Lab VIEW 2014 to build pure electricity Electrical safety monitoring platform for electric bus can realize real-time alarm and fault diagnosis. 6. The practicability and reliability of high-voltage electric safety monitoring system for pure electric vehicle based on virtual instrument are verified by the experimental data obtained from real vehicle experiments.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.72

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