73.5 uW Indoor-Outdoor Light Harvesting System with Global Maximum Power Point Tracking

This work introduces a light harvesting system with battery management. In contrast to relevant solutions that operate in limited ranges, the proposed system covers a wide operating input power range from 10 uW up to 300 mW. Specifically, experimental results highlight that, combined with a 73 × 94 mm flexible light harvester, it can harness light in a range from 50 LUX (indoor lighting) up to 120,000 LUX (outdoor lighting). The introduced system consists of a boost converter and an ultra-low power microcontroller (MCU). The MCU performs Global Maximum Power Point Tracking (GMPPT), using a resistor-free time-based input power sensing method, to calculate the input power of the converter, which does not interfere with the operation of the boost converter. The efficiency of the GMPPT system was evaluated with detailed experimentation, where we achieved 99.75% average GMPPT tracking efficiency while consuming only 73.5 uW at 4.2 V.

[1]  Edgar Sánchez-Sinencio,et al.  An 86% Efficiency 12 µW Self-Sustaining PV Energy Harvesting System With Hysteresis Regulation and Time-Domain MPPT for IOT Smart Nodes , 2015, IEEE Journal of Solid-State Circuits.

[2]  Des Gibson,et al.  Development of an Indoor Photovoltaic Energy Harvesting Module for Autonomous Sensors in Building Air Quality Applications , 2017, IEEE Internet of Things Journal.

[3]  Sanjeevikumar Padmanaban,et al.  Maximum Power Point Tracking Implementation by Dspace Controller Integrated Through Z-Source Inverter Using Particle Swarm Optimization Technique for Photovoltaic Applications , 2018 .

[4]  Goro Fujita,et al.  Partial Shading Detection and Global Maximum Power Point Tracking Algorithm for Photovoltaic with the Variation of Irradiation and Temperature , 2019 .

[5]  Ayman A. Fayed,et al.  A MPPT Circuit With 25 $\mu\text{W}$ Power Consumption and 99.7% Tracking Efficiency for PV Systems , 2017, IEEE Transactions on Circuits and Systems I: Regular Papers.

[6]  Adel Nasiri,et al.  Indoor power harvesting using photovoltaic cells for low power applications , 2009, 2009 13th European Conference on Power Electronics and Applications.

[7]  Oscar Lopez-Lapena,et al.  A Closed-Loop Maximum Power Point Tracker for Subwatt Photovoltaic Panels , 2012, IEEE Transactions on Industrial Electronics.

[8]  Edgar Sanchez-Sinencio,et al.  A Highly Efficient Ultralow Photovoltaic Power Harvesting System With MPPT for Internet of Things Smart Nodes , 2015, IEEE Transactions on Very Large Scale Integration (VLSI) Systems.

[9]  Tony Tae-Hyoung Kim,et al.  A Self-Adaptive Time-Based MPPT With 96.2% Tracking Efficiency and a Wide Tracking Range of 10 $\mu$ A to 1 mA for IoT Applications , 2017, IEEE Transactions on Circuits and Systems I: Regular Papers.

[10]  Edgar Sanchez-Sinencio,et al.  Multiple Input Energy Harvesting Systems for Autonomous IoT End-Nodes , 2018 .

[11]  Julien Penders,et al.  Energy Harvesting for Autonomous Wireless Sensor Networks , 2010, IEEE Solid-State Circuits Magazine.

[12]  Vivek Agarwal,et al.  Maximum Power Point Tracking Scheme for PV Systems Operating Under Partially Shaded Conditions , 2008, IEEE Transactions on Industrial Electronics.

[13]  M. A. Danandeh,et al.  Comparative and comprehensive review of maximum power point tracking methods for PV cells , 2018 .