基于双滞环的铅酸蓄电池组并联充放电控制

Parallel Charging and Discharging Control of Lead-acid Battery Packs Based on Double Hysteresis Loop

铅酸蓄电池组并联充放电过程中,面临单体性能差异导致的充放电不均衡问题,进而影响了电池组整体性能和寿命。对此,研究基于双滞环的铅酸蓄电池组并联充放电控制方法。首先,通过分析铅酸蓄电池组并联充放电工作状态,建立铅酸蓄电池组工作等效模型;然后,将识别出的扰动因素作为传递函数的输入变量,从而确定扰动变量的传递函数;最后,基于双滞环技术原理,分解扰动变量进行误差弥补,实现铅酸蓄电池组并联充放电工作的均衡控制。实验结果表明,以某直流系统中退运的铅酸蓄电池组作为测试对象,在所设计方法应用后,可以实现单组电池在并联充放电过程中的额定电压控制,有效保证其稳定运行。

During the parallel charging and discharging process of lead-acid battery packs,there is a problem of uneven charging and discharging caused by individual performance differences,which in turn affects the overall performance and lifespan of the battery pack.In this regard,research is conducted on a parallel charging and discharging control method for lead-acid battery packs based on double hysteresis loops.Firstly,by analyzing the parallel charging and discharging working status of lead-acid battery packs,an equivalent working model of lead-acid battery packs is established.Then,the identified disturbance factors will be used as input variables for the transfer function,thereby determining the transfer function of the disturbance variables.Finally,based on the principle of double hysteresis technology,the disturbance variables are decomposed for error compensation,achieving balanced control of parallel charging and discharging of lead-acid battery groups.The experimental results show that using the lead-acid battery pack returned from a DC system as the test object,after the application of the designed method,the rated voltage control of a single battery pack during parallel charging and discharging can be achieved,effectively ensuring its stable operation.