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首页> 外文期刊>Journal of Energy Storage >A successive approximation method to precisely measure leakage current of the rechargeable Lithium coin battery
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A successive approximation method to precisely measure leakage current of the rechargeable Lithium coin battery

机译：逐次逼近法精确测量可充电锂硬币电池的泄漏电流

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摘要

When the rechargeable Lithium coin battery is employed as the storage component for indoor energy harvesting, the leakage current of the battery cannot be ignored, especially in ultra-low-power applications. The leakage current of the Lithium coin battery is commonly believed in the low μA range. However the exact value is unknown. An experimental method to measure leakage current by applying a known charge current in μAs to a stabilized post-charge battery to observe the sign of the battery terminal voltage change is proposed. When the applied charge current is larger than the leakage current, a positive sign (terminal voltage increase) can be observed. Otherwise a negative sign appears. By gradually changing the charge current using the successive approximation search algorithm, the leakage current will finally converge to the applied charge current. The convergence happens after the sign changes in two successive search procedures, demonstrating that charge currents are approaching the leakage current from both directions. The accuracy of the approximation can be improved by adjusting the number of sign changes in the successive approximation search algorithm. The proposed method permits the full capacity of a rechargeable Lithium coin battery to be utilised in ultra-low-power applications.
机译：当将可充电锂硬币电池用作室内能量收集的存储组件时，电池的泄漏电流将不容忽视，尤其是在超低功率应用中。通常认为锂硬币电池的泄漏电流在低μA范围内。但是，确切的值是未知的。提出了一种通过向稳定的后充电电池施加以μA为单位的已知充电电流来观察电池端子电压变化的信号来测量泄漏电流的实验方法。当施加的充电电流大于泄漏电流时，可以观察到正号（端子电压升高）。否则会出现负号。通过使用逐次逼近搜索算法逐渐改变充电电流，泄漏电流将最终收敛到所施加的充电电流。在两个连续的搜索过程中，符号发生变化之后会发生收敛，这表明充电电流正从两个方向接近泄漏电流。通过在逐次逼近搜索算法中调整符号变化的数量，可以提高逼近的准确性。所提出的方法允许将可再充电锂硬币电池的全部容量用于超低功率应用中。

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  • 来源
    《Journal of Energy Storage》 |2017年第10期|442-446|共5页
  • 作者

    Yue Xicai; Kiely J.; Ghauri S.; Kauer Matthias; Bellanger Mathieu; Desmond R. Gibson Des;

  • 作者单位

    Department of Engineering, Design and Mathematics, University of the West of England, Bristol, United Kingdom;

    Department of Engineering, Design and Mathematics, University of the West of England, Bristol, United Kingdom;

    Department of Engineering, Design and Mathematics, University of the West of England, Bristol, United Kingdom;

    Sharp Laboratories of Europe, Oxford, United Kingdom;

    Sharp Laboratories of Europe, Oxford, United Kingdom;

    Gas Sensing Solutions, Glasgow, United Kingdom,University of the West of Scotland, Paisley, Scotland, United Kingdom;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Leakage current; Lithium coin battery; Successive approximation; Trickle charge;

    机译：漏电流;锂纽扣电池;逐次逼近;ckle流充电;

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