高精度锂电池电量监测策略及采集电路的研究与设计

发布时间：2018-01-04 23:31

本文关键词：高精度锂电池电量监测策略及采集电路的研究与设计　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：锂离子电池由于具有高能量密度和绿色环保的优点,被广泛的应用于笔记本电脑和各种手持设备中,同时随着人们环保意识的提升和能源危机的加重,锂离子电池也扩展到了电动汽车和航天航空等领域。锂离子电池的发展也对其相应的电量监测计提出了日益苛刻的标准,人们更希望移动设备也能像笔记本电脑一样显示剩余运行时间。因此高精度的锂电池电量监测计策略及硬件电路的实现具有很高的应用价值。本文首先简述了课题研究的背景意义,介绍了当前锂离子电池电量监测计的发展现状,并对不同锂电池电量监测策略的优缺点对比,之后简述了锂离子电池的工作原理,并对影响锂离子电池内阻的因素做了重点讨论分析。然后在传统的锂离子电池电量监测技术的基础之上,有机结合开路电压法和库仑计法,得到了精确计算电池剩余运行时间的算法策略,该高精度算法策略能够同时实时更新内阻、初始容量和放电曲线的数据库。该自适应算法能够通过动态建模的方式有效地补偿了锂离子电池自放电率、温度和老化程度等因素造成的剩余运行时间计算误差。本论文在完成了高精度锂离子电池电量监测策略的研究之后,重点研究了锂离子电池温度和电压采集电路的设计与仿真。本人研究设计的模块主要是斩波运算放大器、开关电容带隙基准电路和辅助电路,并利用HSPICE仿真软件和SMIC0.13um工艺库验证了理论设计的可行性和正确性。与普通的锂电池电量监测计相比,此监测策略可精确监测电池老化、温度和循环次数等造成的阻抗变化,有效且精确地计算出电池剩余运行时间,从而延长手持设备、电动工具和医疗设备等应用的锂电池运行时间。此外,本论文设计的高性能温度和电压采集电路高准确性和高灵敏度的优点,可更广泛地应用于电池管理系统。
[Abstract]:Due to the advantages of lithium ion battery with high energy density and green environmental protection, has been widely used in notebook computer and handheld devices, and with the increase of people's awareness of environmental protection and improve the energy crisis, the lithium ion battery is also extended to the electric automobile and aerospace fields. Power monitoring the development of lithium ion battery for the plan put forward more strict standards, people hope that mobile devices can also like the notebook computer display remaining time. It has very high application value for lithium battery monitoring so high precision meter strategy and hardware circuit. This paper first introduces the background and significance of the research, introduces the current development status lithium ion battery monitor, and compared the advantages and disadvantages of different lithium battery monitoring strategy, then the working principle of lithium ion battery, and the Factors affecting the internal resistance of the lithium ion battery was discussed. Then based on the analysis of lithium ion battery monitoring technology of the traditional combination of open circuit voltage method and the coulometric method, the accurate calculation of the battery remaining running time of the algorithm, the high precision of calculation strategy can also update the initial capacity and internal resistance the discharge curve database. The adaptive algorithm can through the dynamic modeling method can effectively compensate the lithium ion battery self discharge rate, remaining time caused by temperature and aging degree of calculation error. Based on the research of high precision lithium ion battery monitoring strategy is completed, focusing on the design and Simulation of lithium ion battery voltage and temperature acquisition circuit. I study the design of the module is the main operational amplifier, switch capacitor bandgap reference circuit and auxiliary electric The road, and the use of HSPICE simulation software and SMIC0.13um database technology to verify the theoretical correctness and feasibility of the design. Compared with the ordinary lithium battery monitoring, the monitoring strategy can accurately monitor the battery aging, the impedance change caused by temperature and cycle times, effectively and accurately calculate the remaining battery run time, thus extending the hand the running time of equipment, lithium battery electric tools and medical equipment applications. In addition, the design of high performance temperature and voltage acquisition circuit has the advantages of high accuracy and high sensitivity, can be widely used in battery management system.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM912

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