基于VRLA电池电化学模型的建模方法研究

Modeling method of VRLA based on electrochemical equation

阀控式密封铅酸蓄电池(VRLA)具有密封性好、成本低廉的优势,广泛应用于储能电站、电动车辆和分布式发电等领域。在日常维护和使用过程中,需要对VRLA的各项参数进行检测和计算,因此建立准确的电池模型至关重要。基于能斯特(Nernst)电化学方程推导了VRLA的电化学模型,在此基础上考虑热力学温度和荷电状态(State of Charge,SOC)的影响,引入了等效电池欧姆内阻,将电化学模型转化为可用于数学建模的物理模型,给出了基于Matlab/Simulink的建模仿真结果。

Valve-regulated lead acid battery(VRLA)has the advantage of good sealing ability and low cost.It is widely applied in the fields of energy storage,electric vehicles and distributed generation.In the routine utilization and maintenance,the parameters of the VRLA should be detected or calculated.Therefore,it's important to establish an accurate battery model.In this paper,the electrochemical model of the VRLA based on the Nernst equation is deduced.The influence of the thermodynamic temperature and state of charge(SOC)are taken into consideration on the basis.The equivalent internal resistance of battery is introduced.The electrochemical model can be transformed into the physical model for mathematical modeling.The simulation result based on the MATLAB/Simulink is given.