摘要
针对现今应用广泛的增程式电动汽车动力电池存在过充过放,影响其使用寿命的问题,同时为减少动力电池维修和更换的成本,并能将再生制动回收的能量充分利用。提出串并联结构可变复合电源结构,利用再生制动技术回收车辆制动能量,改善复合电源的工作模式,用超级电容来承担过充过放的极限功率。提出了通过输出固定占空比,控制再生制动电流恒定,实时监测超级电容两端电压恒定,回收再生制动能量,并高效应用。基于PID闭环控制优化再生制动控制方法,通过MATLAB/Simulink搭建仿真平台,对两种再生制动控制方法进行仿真与验证,研究结果证实该方法的有效性,优化之后效果明显。
In view of the problem of overcharge and over discharge of the power battery of the extended range electric vehicle which is widely used today, which affects its service life, in order to reduce the cost of maintenance and replacement of the power battery and make full use of the energy recovered by regenerative braking. A series parallel variable composite power supply structure is proposed. Regenerative braking technology is used to recover vehicle braking energy, improve the working mode of the composite power supply, and super capacitor is used to bear the limit power of overcharge and discharge. It is proposed that the regenerative braking current can be controlled to be constant by outputting a fixed duty ratio, and the voltage at both ends of the super capacitor can be monitored to be constant in real time, so that the regenerative braking energy can be recovered and applied efficiently. The regenerative braking control method is optimized based on PID closed-loop control. The simulation platform is built by Matlab/Simulink to simulate and verify the two regenerative braking control methods. The research results show that the proposed method is effective and the effect is obvious after optimization.
作者
任欣欣
倪骁骅
REN Xinxin;NI Xiaohua(Yancheng Institute of Technology,School of Automotive Engineering,Yancheng 224051,China)
出处
《农机使用与维修》
2023年第2期1-7,共7页
Agricultural Machinery Using & Maintenance
基金
江苏省高等学校自然科学研究面上项目(18KJB460029)。
关键词
PID
串并联结构可变
复合电源
超级电容
PID
variable series parallel structure
composite power supply
super capacitor
