Hybrid Charging and Storage Design in Sustainable Solar-powered Wireless Sensor Node

In view of the large scale and distributed characteristics of transformers, which lead to inconvenient manual inspection and state monitoring, and the limited energy of batteries restricting the development of wireless sensor nodes (WSNs), WSNs powered by solar energy are a promising approach. We pr...

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Bibliographic Details
Published in:Sensors and materials 2022-01, Vol.34 (7), p.2771
Main Authors: Wang, Lu, Li, Dongsheng, Ma, Yintao, Zhao, Libo, Chen, Yao, Zhang, Junlong, Jiang, Zhuangde, Maeda, Ryutaro
Format: Article
Language:English
Subjects:
Charging
Circuits
Design
Energy harvesting
Energy storage
Illumination
Inspection
Light
Lithium batteries
Maximum power tracking
Power consumption
Power management
Solar energy
Transformers
Wireless sensor networks
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Summary:In view of the large scale and distributed characteristics of transformers, which lead to inconvenient manual inspection and state monitoring, and the limited energy of batteries restricting the development of wireless sensor nodes (WSNs), WSNs powered by solar energy are a promising approach. We propose a power management circuit for dual energy storage and dual-channel charging of a supercapacitor and a lithium battery with four modes to deal with the different charging currents of photovoltaic power generation under strong and weak light illumination, as well as the time mismatch between the energy harvesting power and WSN consumption power. We designed a low-power WSN with temperature, humidity, vibration, and illumination sensors in a low-duty-cycle operation mode with an average current consumption of 4.96 mA. Our solar power management circuit with undervoltage lockout (UVLO), maximum power point tracking (MPPT), quick charging, and a sustainable output characteristic is designed by LTspice simulation and verified by experiment in alternating light outdoors. The experiment demonstrates sustainable autonomous wireless sensing by dual charging and the feasibility of our storage design for solar energy harvesting, indicating its potential application in grid transformers.
ISSN:0914-4935
2435-0869
DOI:10.18494/SAM3740