Magnetic tomography for lead acid batteries
Magnetic tomography for lead acid batteries
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DOI：
10.1016/j.est.2017.03.014
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发表时间：
2017-08
影响因子：
9.4
通讯作者：
H. Harrison;G. Cooke;D. Hewitt;D. Stone;James E. Green
中科院分区：
文献类型：
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作者：
H. Harrison;G. Cooke;D. Hewitt;D. Stone;James E. Green
本文探讨了反问题的方法，找到一个电化学电池内的电流分布从磁场测量。电流分布被证明是一个有用的测量诊断的细胞和细胞设计的发展。现有的电流分布测量方法进行了讨论，提供背景和动机的工作。磁场测量可以非侵入性地获得，并且包含关于电流分布的信息，该信息使用适当的求解器提取。实验结果测试一个特定的反问题求解器的有效性，使用模拟和真实的磁场测量。所提出的求解器是基于文献中发现的一个，但具有新颖的特定问题的修改。模拟了正演模型定义中电导值的误差，以量化其对溶液质量的影响。提出了一种改进的求解器，以提高对这些模型误差的鲁棒性。当使用来自单元的电阻器-导线模型的真实的测量数据和来自更精确地表示单元板网格和活性物质的电导的模型的模拟数据时，这导致改进的解质量。
This paper explores the inverse problem approach for finding the current distribution within an electrochemical cell from magnetic field measurements. Current distribution is shown to be a useful measurement for diagnosis of cells and development of cell design. Existing current distribution measurement methods are discussed to provide context and motivation for the work. Magnetic field measurements can be obtained non-invasively and contain information about the current distribution, which is extracted using an appropriate solver. Experimental results are presented which test the effectiveness of a particular inverse problem solver, using both simulated and real magnetic field measurements. The solver presented is based upon one found in literature, but with novel problem-specific modifications. Errors in conductance values in the forward model definition are simulated in order to quantify their effect on solution quality. A modification to the solver is proposed to improve robustness against these model errors. This results in improved solution quality when using real measured data from a resistor-wire model of a cell, and simulated data from a model which more accurately represents the conductance of the cell plate grid and active mass.