纯电动城市物流车动力电池温度稳定性研究

发布时间：2018-07-03 05:02

本文选题：纯电动车 + 单体电池　；参考：《太原理工大学》2017年硕士论文

【摘要】：随着社会经济的不断发展与城市居住环境的恶化,纯电动汽车作为在行驶过程中以电池组为唯一动力来源的无污染交通工具,得到了政府的高度重视与扶持。动力电池组作为电动汽车的核心组成部分,其性能与温度稳定性密切相关,温度过高过低都会影响电动汽车的性能,温度失控时甚至会引发电池内短路从而发生事故。本课题以某型号纯电动汽车的电池为研究对象,以控制电池组温度稳定性为目标,对电池的温度特性进行了研究。具体工作如下:(1)对纯电动汽车、动力电池和电池管理系统的相关知识进行了文献综述,分析了纯电动汽的发展优势及其所面临的困难,并着重探究了动力电池目前的国内外研究现状;(2)通过对单体电池的反应机理和生热理论的研究,以电池基本模型为基础,结合动力电池的基本性能,建立了单体电池的三维热效应模型;(3)根据建立的单体电池数学模型推导出生热速率公式,得到了与仿真相关的各热物性参数及电池等效材料的各方向导热系数。通过仿真计算得到了在不同工况下的电池生热云图;(4)搭建了单体电池的生热试验平台,对单体电池进行了充放电试验。通过试验验证了模型的准确性,并通过试验数据分析了电池生热变化的原因及误差来源。(5)基于电池的单体模型,完成了电池组的理论建模和试验仿真,并设计了试验验证平台,为控制电动汽车电池组的温度稳定性提供了理论基础和试验参考。本文通过研究电池的生热机理,以单体电池与电池组为研究对象,运用仿真计算和试验验证相结合的方法对电池的生热情况进行了研究,为电动汽车电池组温度场控制、试验及电池箱优化设计提供了理论和试验基础。
[Abstract]:With the development of social economy and the deterioration of urban living environment, pure electric vehicles (EVs), as a non-polluting vehicle with battery pack as the only power source in the driving process, have been highly valued and supported by the government. As the core component of electric vehicle, the performance of power battery pack is closely related to temperature stability. Too high and too low temperature will affect the performance of electric vehicle. In this paper, the temperature characteristics of the battery are studied with the aim of controlling the temperature stability of the battery pack, taking the battery of a certain type of pure electric vehicle as the research object. The specific work is as follows: (1) the related knowledge of pure electric vehicle, power battery and battery management system is reviewed, and the advantages of pure electric steam development and its difficulties are analyzed. The current research situation of power battery at home and abroad is emphasized. (2) through the research of reaction mechanism and heat generation theory of single cell, based on the basic model of battery, combined with the basic performance of power battery, (3) according to the established mathematical model of single cell, the formula of birth heat rate is derived, and the thermal physical parameters related to the simulation and the thermal conductivity of the equivalent material are obtained. The heat generation cloud diagram under different operating conditions was obtained by simulation. (4) the heat generation test platform of single cell was set up and the charge / discharge test of single cell was carried out. The accuracy of the model is verified by experiments, and the causes and error sources of heat generation of the battery are analyzed. (5) based on the single cell model, the theoretical modeling and experimental simulation of the battery pack are completed, and the test verification platform is designed. It provides a theoretical basis and experimental reference for controlling the temperature stability of electric vehicle battery pack. By studying the heat generation mechanism of the battery, taking the single cell and the battery pack as the object of study, the heat generation of the battery is studied by the method of simulation calculation and experimental verification, which is the control of the temperature field of the battery pack of the electric vehicle. The test and optimal design of the battery box provide the theoretical and experimental basis.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U469.72

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