A Low Power Photo-Voltaic Battery Charger with Improved Reliability and Energy Recovery to Reduce Shading Effect

Maziar Rastmanesh, E. El-Masry, K. El-Sankary
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引用次数: 2

Abstract

Micro-solar energy harvesting systems can operate efficiently at relatively high threshold luminance, and they exhibit 0% efficiency below threshold luminance or at strong shading. The objective of this paper is to introduce a new topology that improves the charge efficiency, functionality, sensitivity, and reliability of the Photo-Voltaic (PV) solar chargers during strong overcast while employing minimum hardware. The proposed topology responds to a wide range of solar irradiation and functions as an efficient charger with an improved battery charging current for slow charge topology at strong shading. It employs a boost converter with a second inductor and exploits the non-linearity of the PV characteristics of a solar cell to reduce power loss. To verify the proposed topology, a prototype, 1.4V/18mA charger, was built and successfully tested with 87.3% heavily sourced efficiency retained.
一种提高可靠性和能量回收的低功率光伏电池充电器,以减少遮阳效应
微型太阳能收集系统可以在较高的阈值亮度下高效运行,而在阈值亮度以下或强遮阳下,它们的效率为0%。本文的目的是介绍一种新的拓扑结构,该拓扑结构可以提高光伏(PV)太阳能充电器在强阴天期间的充电效率、功能、灵敏度和可靠性,同时使用最少的硬件。所提出的拓扑结构响应大范围的太阳辐射,并作为一个高效充电器,在强遮阳下的慢充电拓扑结构中具有改进的电池充电电流。它采用带第二电感的升压变换器,并利用太阳能电池PV特性的非线性来减少功率损失。为了验证所提出的拓扑结构,构建了1.4V/18mA充电器原型,并成功测试,效率保持在87.3%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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