Design approach for solar cell and battery of a persistent solar powered GPS tracker

Sahraei N, Watson SM, Pennes A, Peters IM, Buonassisi T (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Japanese Journal of Applied Physics Japan Society of Applied Physics

Book Volume: 56

Article Number: 08ME01

Journal Issue: 8

DOI: 10.7567/JJAP.56.08ME01

Abstract

Sensors with wireless communication can be powered by photovoltaic (PV) devices. However, using solar power requires thoughtful design of the power system, as well as a careful management of the power consumption, especially for devices with cellular communication (because of their higher power consumption). A design approach can minimize system size, weight, and/or cost, while maximizing device performance (data transmission rate and persistence). In this contribution, we describe our design approach for a small form-factor, solar-powered GPS tracker with cellular communication. We evaluate the power consumption of the device in different stages of operation. Combining measured power consumption and the calculated energy-yield of a solar cell, we estimate the battery capacity and solar cell area required for 5 years of continuous operation. We evaluate trade-offs between PV and battery size by simulating the battery state of charge. The data show a trade-off between battery capacity and solar-cell area for given target data transmission rate and persistence. We use this analysis to determine the combination of solar panel area and battery capacity for a given application and the data transmission rate that results in minimum cost or total weight of the system.

Involved external institutions

Singapore-MIT Alliance for Research and Technology (SMART) SG Singapore (SG) Massachusetts Institute of Technology (MIT) US United States (USA) (US)

How to cite

APA:

Sahraei, N., Watson, S.M., Pennes, A., Peters, I.M., & Buonassisi, T. (2017). Design approach for solar cell and battery of a persistent solar powered GPS tracker. Japanese Journal of Applied Physics, 56(8). https://doi.org/10.7567/JJAP.56.08ME01

MLA:

Sahraei, Nasim, et al. "Design approach for solar cell and battery of a persistent solar powered GPS tracker." Japanese Journal of Applied Physics 56.8 (2017).

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