摘要:随着世界上电动汽车行业的发展，锂离子电池作为一种新兴的二次电池，将在未来的纯电动汽车产业上发挥巨大的作用。电池管理系统（BMS）作为电动汽车的重要组成部分，保障了电动汽车安全可靠的运行。电池电压、电流、温度等状态量的监测是BMS最基本功能，它为电池的荷电状态（SoC）分析、健康状态（SoH）分析、能量控制管理和信息管理提供必要的实时监测数据。本文针对BMS对电池状态量监测的实时性和精确性要求，分析了目前电池状态量采集的方法，提出采用LTC6804-2电压采集芯片、ACS712电流传感和NTC热敏电阻配合飞思卡尔TRK-KEA128单片机实现16串48V磷酸铁锂电池组单体电池的电压、电流和温度的电池参数采集。另外，针对串联电池组的不一致性问题，详细分析了现行典型均衡电路，并设计出一套均衡系统。实验测试表明，系统运行稳定，均衡效果明显，电压、电流和温度相对误差分别低于0.273%、1.915%、7.895%，可为电池管理系统提供可靠的数据，在实际工程中具有很好的应用价值。38748
毕业论文关键词:锂离子电池；电池管理系统；电池参数；均衡系统
Data Acquisition and Battery Equalization Design for Lithium-ion Battery Management System
Abstract:With the development of the electric car industry in the world, lithium-ion battery as a new secondary battery, will play an important role in the pure electric vehicle industry in the future. As an important part of electric cars, battery management system (BMS) ensure the safety of electric cars running.Battery state quantities of voltage, current, temperature monitoring are the most basic functions in BMS, they provide real-time monitoring datas for the battery charged state of (SoC), health (SoH) analysis, energy control management and information management.In view of the battery status monitoring in real-time and accuracy requirements, this paper analyzes the  gathering method of the current battery status signal , and it collects the information of 48 v lithium iron phosphate( such as battery monomer battery voltage, current and temperature of battery parameters ) by connecting LTC6804-2 voltage acquisition chip, ACS712 current sensor and NTC-thermistors with TRK-KEA128 microcomputer.In addition, in view of the inconsistency problem in series battery pack, this paper analyzes the current typical balance circuit in detail, and designed a set of balance system.Experimental tests show that the system runs stably, and balance effect is obvious, relative error voltage, current and temperature are lowerthan 0.273%、1.915%、7.895% respectively, it can provide reliable data for the battery management system, which will have a good application in practical engineering.
Key Words：lithium-ion battery; battery management system; battery parameters; balance system
目录
1 绪 论    1
1.1电池管理系统的研究现状    1
1.1.1国外电池管理系统的研究现状    1
1.1.2国内电池管理系统的研究现状    2
1.2课题研究意义以及内容    3
1.2.1 课题研究的意义    3
1.2.2课题研究的内容    3
2锂离子电池的工作原理及特性    5
2.1锂离子电池的工作原理    5
2.2锂离子电池的工作特性    6
3锂离子电池组均衡技术研究    7
3.1 均衡控制管理及其意义    7
3.1.1 均衡控制管理的基本模型    7
3.1.2 均衡控制管理的意义    7
3.2电池均衡的判断标准    8
3.2.1以电池的电荷状态为判断标准    8
3.2.2以电池容量为判断标准    8
3.2.3以电池电压为判断标准    8 锂离子动力电池管理系统数据采集与电池均衡硬件电路设计+电路图:http://www.751com.cn/zidonghua/lunwen_37802.html