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Synthetic methods for the evaluation of the State of Health (SOH) of nickel-metal hydride (NiMH) batteries

机译:评估镍氢(NiMH)电池健康状态(SOH)的综合方法

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摘要

The State of Health (SOH) of a battery is important to know the maximum energy that a battery can release while is operative and to plan the correct maintenance. In this work, we have implemented a diagnostic method to evaluate the SOH of single nickel metal hydride (NiMH) cells, that have an important role in power tools applications. Single NiMH cells of 1.2 V and 1.3 Ah have been characterized with Electrochemical Impedance Spectroscopy (EIS) technique to evaluate the SOH with synthetic methods. Through the study of an equivalent circuit model, we determine that three free parameters synthesize the information contained in an impedance spectrum. A new simplification allows us to construct a diagnostic diagram with only two degree of freedom. A mathematical approach based on the Demp-ster-Schafer Theory of Evidence has been implemented to interpret the diagnostic diagram. Combining the points obtained, by the impedance spectra (IS) at different State of Charge (SOC) and SOH, the Theory of Evidence can improve the estimation of the SOH iteratively, a great advantage compared to the classic Theory of Probability.
机译:电池的健康状态(SOH)对于了解电池在运行时可以释放的最大能量并计划正确的维护非常重要。在这项工作中,我们实施了一种诊断方法来评估单镍金属氢化物(NiMH)电池的SOH,这在电动工具应用中具有重要作用。已通过电化学阻抗谱(EIS)技术表征了1.2 V和1.3 Ah的单个NiMH电池,以通过合成方法评估SOH。通过研究等效电路模型,我们确定三个自由参数可以合成阻抗谱中包含的信息。一种新的简化方法使我们能够构建只有两个自由度的诊断图。已实施基于Demp-ster-Schafer证据理论的数学方法来解释诊断图。通过将在不同荷电状态(SOC)和SOH处的阻抗谱(IS)结合获得的点,证据理论可以迭代地改进SOH的估计,与经典的概率论相比,这是一个很大的优势。

著录项

  • 来源
    《Energy Conversion & Management》 |2015年第3期|1-9|共9页
  • 作者单位

    Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy;

    Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy,CHOSE (Center for Hybrid and Organic Solar Energy), Via Giacomo Peroni 400/402, 00131 Rome, Italy;

    Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy,CHOSE (Center for Hybrid and Organic Solar Energy), Via Giacomo Peroni 400/402, 00131 Rome, Italy;

    Department of Industrial Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy,CHOSE (Center for Hybrid and Organic Solar Energy), Via Giacomo Peroni 400/402, 00131 Rome, Italy;

    Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy,CHOSE (Center for Hybrid and Organic Solar Energy), Via Giacomo Peroni 400/402, 00131 Rome, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Batteries; State of Charge; State of Health; Nickel-metal hydride; Electrochemical Impedance Spectroscopy;

    机译:电池;充电状态;健康状况;氢化镍金属;电化学阻抗谱;

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