电动汽车锂电电源直流供电系统设计
2018-08-21董燕飞
董燕飞
摘 要: 对锂电电源直流供电系统进行设计在提高电动汽车锂电电源使用量方面具有重要意义。现有的供电系统主要通过增加稳压控制器,提高系统的稳定性,却忽略了各接口连接方式导致系统不稳定的问题。在此提出并设计了基于供电保护的电动汽车锂电电源直流供电系统。在分析电动汽车锂电电源直流供电存在问题的基础上,设计了整体电动汽车锂电电源直流供电系统模块,并针对供电系统接口模块进行了设计,同时添加了保护模块,增加供电系统的稳定性,并给出部分系统软件设计部分。实验结果表明,采用改进供电系统时,其在电动汽车锂电电源直流供电方面要优于传统供电系统,系统稳定性较高,具有一定的优势。
关键词: 电动汽车; 锂电电源; 直流供电; 供电保护; 接口连接; 系统设计
中图分类号: TN86?34; TM911.3 文献标识码: A 文章编号: 1004?373X(2018)16?0144?04
Abstract: The design of the lithium battery DC power supply system has important significance in improving the lithium battery usage amount of electric vehicles. The existing power supply system improves its stability mainly by increasing voltage regulators, which ignores the problem of system instability caused by the connection mode of various interfaces. Therefore, a lithium battery DC power supply system based on power supply protection is proposed and designed for electric vehicles. On the basis of analyzing the problems existing in lithium battery DC power supply of electric vehicles, the whole modules of the lithium battery DC power supply system for electric vehicles are designed. Designs are conducted for the interface module of the power supply system. The protection module is added to increase the stability of the power supply system. The software design part of the system is partially given. The experimental results show that in comparison with the traditional power supply system, the improved power supply system is superior in lithium battery DC power supply of electric vehicles, and has a high stability, which has a certain advantages.
Keywords: electric vehicle; lithium battery; DC power supply; power supply protection; interface connection; system design
0 引 言
電动汽车分为混合动力汽车和纯电动汽车,其是以电为动力或者以电为动力能源之一的汽车。与传统汽车相比,电动汽车对环境的污染小、能量利用率高、不会产生任何有害物质,实现真正意义上的零排放[1]。因此,电动汽车更适合在城市中运行,因电带油,可达到零排放和低噪音的目的,是处理能源及环境问题的关键方法。在推广应用中,也对电动汽车的动力提出了更高的性能要求。电动汽车锂电电源的使用最为常见,其供电系统是电动汽车行驶供应能量,是电动汽车的关键基础系统,供电模式关键有交流供电及直流母线供电两种模式[2]。……
