歧化氧化还原液流电池自放电状态和交叉估计的自适应观测器设计
An Adaptive Observer Design for Charge-State and Crossover Estimation in Disproportionation Redox Flow Batteries undergoing Self-Discharge
摘要:
本文考虑了一种模型制定和自适应观测器的设计,同时估计的充电状态和交叉通量在双离子氧化还原液流电池。这种新的非水电池化学允许一个简单的等温集总参数模型制定。钒通过多孔隔膜的传输是电池变量的关键未知函数,并且其在连续函数空间中近似。利用李雅普诺夫分析方法推导了状态观测器和参数观测器的自适应律,并证明了其稳定性和收敛性。观测器增益的数值计算通过求解一个多面体线性矩阵不等式和等式问题,通过凸优化。在实验室液流电池原型上评估该设计的性能,并且示出交叉通量可以被认为是自放电期间该电池配置的荷电状态的线性函数。
英文摘要:
This article considers a model formulation and an adaptive observer design for the simultaneous estimation of the state of charge and crossover flux in disproportionation redox flow batteries. This novel nonaqueous battery chemistry allows a simple isothermal lumped parameter model to be formulated. The transport of vanadium through the porous separator is a key unknown function of battery variables and it is approximated in the space of continuous functions. The state and parameter observer adaptation laws are derived using Lyapunov analysis applied to the estimation error, the stability and convergence of which are proved. Numerical values of observer gains are calculated by solving a polytopic linear matrix inequality and equality problem via convex optimization. The performance of this design is evaluated on a laboratory flow battery prototype, and it is shown that the crossover flux can be considered a linear function of state of charge for this battery configuration during self-discharge.
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