主动均衡型电动自行车锂电池智能保护器研究
发布时间：2018-10-20 14:48
【摘要】：电动自行车作为我国大多数家庭的代步工具,虽然2015年我国的电动自行车销量较2014年的3500万辆降到了2950万辆,但锂电池电动自行车的销量却达到了450万~500万,受益于政策利好和锂电池成本的逐年下降,未来3年锂电自行车仍将保持40%的年均增速,预计到2017年销量将达到1200万辆,锂电池渗透率将达到30%。因此,对于电动自行车用锂电池相关技术的研究在未来一段时间内显得尤为重要。锂电池保护器已经成为电动自行车用锂电池不可缺少的重要组成部分,本文提出一种主动均衡型电动自行车锂电池智能保护器,完成对13串48V锂电池的过充电保护、过放电保护和主动均衡;本文提出一种主动均衡型电动自行车锂电池智能保护器,目的是解决被动均衡型锂电池保护器无法解决的锂电池组单节取电问题和充放电过程中锂电池SOC不一致的问题;本文提出一种基于异常点的主动均衡算法,通过建立电压异常点模型,降低了锂电池保护器在对锂电池进行电压采集时出现的误差,从而提高了锂电池保护器的电压的采集精度,通过本算法,可有效提高锂电池保护器的均衡准确性,对提高锂电池的SOC一致性有明显的帮助,结合智能型锂电池保护器功能,使锂电池保护器具备了可编程控制功能和CAN通信收发功能,便于检查锂电池单体电压状态,提前对电池的健康状态做出预判断。综上,本文提出的主动均衡型电动自行车锂电池智能保护器,创造性的解决电动自行车锂电池的单节取电问题,通过基于异常点的主动均衡算法,实现了提高锂电池电压采样精度和均衡准确性的目的;本文提出一种应用于电动自行车锂电池保护器的DC-DC主动均衡电路,最大可实现194mA的均衡电流,解决了电动自行车用锂电池保护器无法进行主动均衡的问题,对提高锂电池SOC一致性有着明显的帮助;另外,本文提出的锂电池保护器利用CAN通信可以实现锂电池保护器的智能化应用,本课题提出的主动均衡型电动自行车锂电池智能保护器,可以达到提高锂电池的电能转化效率、延长锂电池的使用寿命的目的。
[Abstract]:Although the sales volume of electric bicycles in China dropped to 29.5 million in 2015 compared with 35 million in 2014, the sales of electric bicycles with lithium batteries reached 4.5 million ~ 5 million. Thanks to better policies and falling lithium battery costs, lithium electric bikes will continue to grow at an average annual rate of 40 percent over the next three years, with sales expected to reach 12 million by 2017 and penetration of lithium batteries at 30. Therefore, the research of lithium battery technology for electric bicycle is very important in the future. Lithium battery protector has become an indispensable part of lithium battery for electric bicycle. In this paper, an active equalization intelligent protector of lithium battery for electric bicycle is proposed, which can overcharge 13 series of 48V lithium battery. This paper presents an active equalization type lithium battery intelligent protector for electric bicycle. The purpose of this paper is to solve the problem that the passive equalization lithium battery protector can not solve the problem of single section extraction of lithium battery pack and the problem of SOC inconsistency during charging and discharging. An active equalization algorithm based on outliers is proposed in this paper. By establishing the voltage outlier model, the error of lithium battery protector in voltage acquisition is reduced, and the precision of voltage acquisition of lithium battery protector is improved. It can effectively improve the equalization accuracy of the lithium battery protector, and has obvious help to improve the SOC consistency of the lithium battery. Combined with the function of intelligent lithium battery protector, the lithium battery protector has programmable control function and CAN communication function. Easy to check the lithium battery cell voltage state, in advance of the battery health state to make a pre-judgment. In summary, the active equalization type lithium battery intelligent protector of electric bicycle is proposed in this paper, which creatively solves the problem of single section of electric bicycle lithium battery, and adopts the active equalization algorithm based on abnormal point. The purpose of improving the voltage sampling accuracy and equalization accuracy of lithium battery is realized. In this paper, a DC-DC active equalization circuit applied to the lithium battery protector of electric bicycle is proposed, which can realize the maximum equalization current of 194mA. It solves the problem that the lithium battery protector for electric bicycle can not carry on the active equalization, and it has obvious help to improve the SOC consistency of lithium battery. The lithium battery protector proposed in this paper can realize the intelligent application of the lithium battery protector by using CAN communication. The active equalization type lithium battery intelligent protector of electric bicycle proposed in this paper can improve the power conversion efficiency of the lithium battery. The purpose of prolonging the service life of lithium battery.
【学位授予单位】：重庆邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM912;U484
本文编号：2283481
[Abstract]:Although the sales volume of electric bicycles in China dropped to 29.5 million in 2015 compared with 35 million in 2014, the sales of electric bicycles with lithium batteries reached 4.5 million ~ 5 million. Thanks to better policies and falling lithium battery costs, lithium electric bikes will continue to grow at an average annual rate of 40 percent over the next three years, with sales expected to reach 12 million by 2017 and penetration of lithium batteries at 30. Therefore, the research of lithium battery technology for electric bicycle is very important in the future. Lithium battery protector has become an indispensable part of lithium battery for electric bicycle. In this paper, an active equalization intelligent protector of lithium battery for electric bicycle is proposed, which can overcharge 13 series of 48V lithium battery. This paper presents an active equalization type lithium battery intelligent protector for electric bicycle. The purpose of this paper is to solve the problem that the passive equalization lithium battery protector can not solve the problem of single section extraction of lithium battery pack and the problem of SOC inconsistency during charging and discharging. An active equalization algorithm based on outliers is proposed in this paper. By establishing the voltage outlier model, the error of lithium battery protector in voltage acquisition is reduced, and the precision of voltage acquisition of lithium battery protector is improved. It can effectively improve the equalization accuracy of the lithium battery protector, and has obvious help to improve the SOC consistency of the lithium battery. Combined with the function of intelligent lithium battery protector, the lithium battery protector has programmable control function and CAN communication function. Easy to check the lithium battery cell voltage state, in advance of the battery health state to make a pre-judgment. In summary, the active equalization type lithium battery intelligent protector of electric bicycle is proposed in this paper, which creatively solves the problem of single section of electric bicycle lithium battery, and adopts the active equalization algorithm based on abnormal point. The purpose of improving the voltage sampling accuracy and equalization accuracy of lithium battery is realized. In this paper, a DC-DC active equalization circuit applied to the lithium battery protector of electric bicycle is proposed, which can realize the maximum equalization current of 194mA. It solves the problem that the lithium battery protector for electric bicycle can not carry on the active equalization, and it has obvious help to improve the SOC consistency of lithium battery. The lithium battery protector proposed in this paper can realize the intelligent application of the lithium battery protector by using CAN communication. The active equalization type lithium battery intelligent protector of electric bicycle proposed in this paper can improve the power conversion efficiency of the lithium battery. The purpose of prolonging the service life of lithium battery.
【学位授予单位】：重庆邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM912;U484
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