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首页> 外文会议>Annual IEEE Applied Power Electronics Conference and Exposition >A battery management system adapted for an energy harvester with a low-power state of charge monitoring method and a 24 microwatt intermittently enabled Coulomb counter
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A battery management system adapted for an energy harvester with a low-power state of charge monitoring method and a 24 microwatt intermittently enabled Coulomb counter

机译：一种电池管理系统，适用于能量收割机，具有电荷监测方法的低功率状态和24微播，使库仑计数器

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摘要

This paper presents a battery management system with methods for monitoring both the battery state of charge (SOC) and the discharge amount consumed by a wireless sensor device. The proposed SOC estimation method achieves a low-power operation by using a pulse-shaped input current to obtain the frequency-dependent internal impedance of a battery, and by eliminating the AC-source and sample-hold circuits which are conventionally required. The discharge amount from the battery is monitored with a proposed discharge-estimation algorithm that enables an intermittently enabled Coulomb counter (CC), which leads to low-power operation, keeping the error as low as 2.5 percent - the same result from an always-on CC. Measured power consumption has shown a reduction from 340 microwatt with a conventional always-on CC to 24 micro watts using the proposed method. These two techniques enable the power management system to achieve sub-milliwatt operation.
机译：本文介绍了一种用于监控电池电量（SOC）和无线传感器设备消耗的放电量的方法的电池管理系统。所提出的SOC估计方法通过使用脉冲形输入电流来实现低功率操作，以获得电池的频率相关的内部阻抗，并通过消除通常需要的AC源和采样保持电路。通过建议的放电估计算法监测来自电池的放电量，该估计算法使得能够间歇化的COLOMB计数器（CC），这导致低功率操作，将误差保持低至2.5％ - 来自始终的误差 - 相同的结果在CC上。测量的功耗显示，使用该方法的常规始终如一的CC至24微瓦，从340微型耗电量下降。这两种技术使电源管理系统能够实现亚毫瓦操作。

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