基于ITM的锂离子电池五阶恒流快速充电方法研究
发布时间：2018-08-09 14:16
【摘要】：环境污染问题和能源危机日趋严重,影响了汽车工业的可持续发展。电动汽车是一种绿色、经济的交通工具,因此近年来逐渐赢得了市场并被广泛使用。动力电池是电动汽车的重要储能元件,电动汽车的正常运行和良好工作与动力电池自身的性能和充放电特性息息相关。作为电动汽车储能元件的锂离子电池正被广泛应用,研究锂离子电池高效安全的快速充电方法十分重要。现有快速充电方法充电速度较快,但在平衡充电效率和消除极化关系的问题上还需进一步完善。本文主要研究了基于改进的田口法(ITM)的五阶恒流快速充电方法,其中运用模糊控制技术去电池极化,从而提高充电速度和充电效率,减小电池最大温升,延长锂离子电池的使用寿命。具体完成的研究内容如下:1、选择锂离子电池为研究对象,分析了其工作原理、充放电特性以及影响因素,研究了锂离子电池极化现象的产生机理、原则及消除方法。2、介绍了现有快速充电方法的优缺点和用大电流充电来提高锂离子电池的充电效率的难点,重点研究了五阶恒流快速充电方法的原理,研究采用田口法(TM)正交实验技术和锂离子电池RC等效电路模型来确定五阶恒流电流大小的优化值,同时适时添加间歇和负脉冲来实现去电池的极化。3、研究极化程度的确定及去极化方法。本文设计两个模糊控制器分别决定给予负脉冲的时机和负脉冲去极化的宽度。通过实验确定了包括五阶电流优化值、间歇时长以及负脉冲幅值、去极化时机及负脉冲宽度在内的基于ITM的锂离子电池五阶恒流快速充电方法的优化充电模式。最后通过对比实验,验证了设计的基于ITM的锂离子电池五阶恒流快速充电方法的有效性,相比传统五阶恒流充电方法和基于TM的五阶恒流快速充电方法,该方法充电时间分别缩短了33.9%和8.8%,充电效率分别提高了1.0%和0.5%,最大温升分别降低了26.3%和17.6%。4、建立基于ITM的锂离子电池五阶恒流快速充电系统的结构框图,设计了主电路、各组成子电路以及部分软件实现图,最后搭建锂离子电池硬件实验平台,测试了基于ITM的锂离子电池五阶恒流快速充电系统的功能。本文所做的研究适用的系统包括采用动力电池作为储能装置的电动汽车、便携式电子设备、不间断电源等。
[Abstract]:Environmental pollution and energy crisis are becoming more and more serious, which affects the sustainable development of automobile industry. Electric vehicle is a green and economical means of transportation, so it has gradually won the market and been widely used in recent years. Power battery is an important energy storage component of electric vehicle. The normal operation and good work of electric vehicle are closely related to the performance and charge-discharge characteristics of power battery itself. Lithium ion batteries, which are the energy storage components of electric vehicles, are being widely used. It is very important to study the efficient and safe rapid charging methods of lithium ion batteries. The current rapid charging method is fast, but it needs to be further improved in balancing charging efficiency and eliminating polarization relationship. In this paper, the fifth order constant current fast charging method based on the improved Taguchi method (ITM) is studied, in which the fuzzy control technique is used to depolarization the battery so as to improve the charging speed and charging efficiency and reduce the maximum temperature rise of the battery. Prolong the service life of lithium ion battery. The specific contents of the research are as follows: 1. The working principle, charge-discharge characteristics and influencing factors of lithium ion battery are analyzed, and the mechanism of polarization phenomenon of lithium ion battery is studied. This paper introduces the advantages and disadvantages of the existing rapid charging methods and the difficulties of using high current charging to improve the charging efficiency of lithium-ion batteries, and emphatically studies the principle of the five-order constant current fast charging method. In this paper, Taguchi (TM) orthogonal experiment and RC equivalent circuit model of lithium ion battery are used to determine the optimal value of the fifth order constant current. At the same time, intermittent and negative pulses are added to realize depolarization. 3. The determination of polarization degree and depolarization method are studied. In this paper, two fuzzy controllers are designed to determine the timing of the negative pulse and the width of the depolarization of the negative pulse, respectively. The optimal charging mode of the five-order constant current fast charging method for lithium ion battery based on ITM was determined by experiments including the optimization value of five-order current, the interval length, the amplitude of negative pulse, the time of depolarization and the width of negative pulse. Finally, the validity of the proposed method based on ITM is verified by comparing with the traditional five order constant current charging method and the TM based five order constant current fast charging method. The charging time of this method is reduced by 33.9% and 8.8%, the charging efficiency is increased by 1.0% and 0.5%, the maximum temperature rise is reduced by 26.3% and 17.60.4. the structure block diagram of the five-order constant current rapid charging system for lithium ion battery based on ITM is established, and the main circuit is designed. Finally, the hardware experiment platform of lithium ion battery is built, and the function of the five-order constant current rapid charging system based on ITM is tested. The research in this paper includes electric vehicle, portable electronic equipment, uninterruptible power supply and so on.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM912
[Abstract]:Environmental pollution and energy crisis are becoming more and more serious, which affects the sustainable development of automobile industry. Electric vehicle is a green and economical means of transportation, so it has gradually won the market and been widely used in recent years. Power battery is an important energy storage component of electric vehicle. The normal operation and good work of electric vehicle are closely related to the performance and charge-discharge characteristics of power battery itself. Lithium ion batteries, which are the energy storage components of electric vehicles, are being widely used. It is very important to study the efficient and safe rapid charging methods of lithium ion batteries. The current rapid charging method is fast, but it needs to be further improved in balancing charging efficiency and eliminating polarization relationship. In this paper, the fifth order constant current fast charging method based on the improved Taguchi method (ITM) is studied, in which the fuzzy control technique is used to depolarization the battery so as to improve the charging speed and charging efficiency and reduce the maximum temperature rise of the battery. Prolong the service life of lithium ion battery. The specific contents of the research are as follows: 1. The working principle, charge-discharge characteristics and influencing factors of lithium ion battery are analyzed, and the mechanism of polarization phenomenon of lithium ion battery is studied. This paper introduces the advantages and disadvantages of the existing rapid charging methods and the difficulties of using high current charging to improve the charging efficiency of lithium-ion batteries, and emphatically studies the principle of the five-order constant current fast charging method. In this paper, Taguchi (TM) orthogonal experiment and RC equivalent circuit model of lithium ion battery are used to determine the optimal value of the fifth order constant current. At the same time, intermittent and negative pulses are added to realize depolarization. 3. The determination of polarization degree and depolarization method are studied. In this paper, two fuzzy controllers are designed to determine the timing of the negative pulse and the width of the depolarization of the negative pulse, respectively. The optimal charging mode of the five-order constant current fast charging method for lithium ion battery based on ITM was determined by experiments including the optimization value of five-order current, the interval length, the amplitude of negative pulse, the time of depolarization and the width of negative pulse. Finally, the validity of the proposed method based on ITM is verified by comparing with the traditional five order constant current charging method and the TM based five order constant current fast charging method. The charging time of this method is reduced by 33.9% and 8.8%, the charging efficiency is increased by 1.0% and 0.5%, the maximum temperature rise is reduced by 26.3% and 17.60.4. the structure block diagram of the five-order constant current rapid charging system for lithium ion battery based on ITM is established, and the main circuit is designed. Finally, the hardware experiment platform of lithium ion battery is built, and the function of the five-order constant current rapid charging system based on ITM is tested. The research in this paper includes electric vehicle, portable electronic equipment, uninterruptible power supply and so on.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM912
【参考文献】
相关期刊论文 前10条
1 韦连梅;燕溪溪;张素娜;张洁;吴敏昌;乔永民;王利军;;锂离子电池低温电解液研究进展[J];储能科学与技术;2017年01期
2 赵争鸣;刘方;陈凯楠;;电动汽车无线充电技术研究综述[J];电工技术学报;2016年20期
3 粟慧龙;韩雪;;锂离子电池充电管理及电池容量测量研究[J];电源技术;2016年09期
4 陈小丹;岳明s，
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