Energy harvesting by sweeping voltage-escalated charging of a reconfigurable supercapacitor array

Kim, Sehwan; Chou, Pai H.

doi:10.1109/islped.2011.5993642

Cited by 16 publications

(11 citation statements)

References 14 publications

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“…The inputs of this model are the latitude of the deployment site, orientation and inclination angles of the solar panel, and expected meteorological and environmental conditions. A system comprised of a solar panel, lithium battery, and MPPT control circuit can take full advantage of solar energy to extend the life of the rechargeable battery [ 22 , 23 ].…”

Section: Energy Sourcesmentioning

confidence: 99%

Energy Harvesting Sources, Storage Devices and System Topologies for Environmental Wireless Sensor Networks: A Review

Prauzek

Konecny

Borova

et al. 2018

Sensors

196

132

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The operational efficiency of remote environmental wireless sensor networks (EWSNs) has improved tremendously with the advent of Internet of Things (IoT) technologies over the past few years. EWSNs require elaborate device composition and advanced control to attain long-term operation with minimal maintenance. This article is focused on power supplies that provide energy to run the wireless sensor nodes in environmental applications. In this context, EWSNs have two distinct features that set them apart from monitoring systems in other application domains. They are often deployed in remote areas, preventing the use of mains power and precluding regular visits to exchange batteries. At the same time, their surroundings usually provide opportunities to harvest ambient energy and use it to (partially) power the sensor nodes. This review provides a comprehensive account of energy harvesting sources, energy storage devices, and corresponding topologies of energy harvesting systems, focusing on studies published within the last 10 years. Current trends and future directions in these areas are also covered.

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Section: Energy Sourcesmentioning

confidence: 99%

Energy Harvesting Sources, Storage Devices and System Topologies for Environmental Wireless Sensor Networks: A Review

Prauzek

Konecny

Borova

et al. 2018

Sensors

196

132

View full text Add to dashboard Cite

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“…Supercapacitors have extremely long life cycles, high power density, and eco-friendly materials [2,5,6]. The voltage difference between an anode and a reference electrode is 0.85 to 2 V while the current varies from 2 to 4 mA depending on the soil condition surrounding a single reference electrode.…”

Section: Power Source For Rmcp Systemsmentioning

confidence: 99%

Energy harvesting from anti-corrosion power sources

Kim

Lee

Chou

2014

Proceedings of the 2014 International Symposium on Low Power Electronics and Design

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This work presents energy harvesting techniques from low-voltage current used to prevent galvanic corrosion between a metallic structure and a permanent copper/copper sulfate (Cu/CuSO4) reference electrode. Supercapacitors are adopted to compensate for or overcome the limitations of batteries. Then, a boost converter is used to convert the low voltage levels of galvanic corrosion to that needed by the complementary metal oxide semiconductor (CMOS) technologies used for the wireless sensor systems. Experimental results show that our proposed harvesting schemes significantly reduce the overhead of the charging circuitry, which enables nearly full charging of supercapacitors of up to 350 F under the low power conditions of 3 mW (i.e., 3 mA at 1 V). More importantly, our system enables maintenance-free operation of remote-monitoring cathodic protection (RMCP) systems in harsh environments, where sunlight or wind power may be unavailable or unpredictable.

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“…DuraCap relieves this problem by adding a small capacitor besides a large reservoir supercapacitor array [8]. EscaCap performs reconfiguration of the supercapacitor array to maximize DC-DC converter efficiency [9].…”

Section: Other Practical Considerationsmentioning

confidence: 99%

“…DC-DC converter has minimum required input voltage, and so the system designer should also consider all these practical requirements when designing a system [8]. Esca-Cap performs reconfiguration of the supercapacitor array to maximize DC-DC converter efficiency [9]. Nowadays, more systems are being equipped with renewable energy sources such as photovoltaic (PV) modules.…”

Section: Introductionmentioning

confidence: 99%

Power Converter-aware Design of Electronics Systems

Park

Kim

Park

et al. 2013

IPSJ Transactions on System LSI Design Methodology

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Semiconductor scaling makes the individual part can no longer share the same supply voltage, and some chips even require multiple different supply voltage levels. Different input and output voltage standard specification of each device make use of multiple supply voltage levels. Various devices such as display, RF, USB, SD card, etc. increase the number of supply voltage levels. Moreover, analog devices often do not allow sharing power supply due to coupling noise. However, those components are commonly powered by a single power source such as a battery. Consequently, power converters such as on-and off-chip switching-mode DC-DC converters, low-dropout linear regulators and charge pumps are largely populated even on a single circuit board. Efficiency of the power converters is known to be high enough and often ignored during power management policy development. However, their actual conversion efficiency varies significantly according to device activity and power mode, which sometimes results in substantially lower efficiency than the value provided in datasheets. Moreover, hardware designers generally optimize the power converters for the maximum power supply current of the device and even perform over-design while the actual device power consumption during runtime could be largely offset from the energy-optimal operating point. This tutorial paper covers a wide range of topics on power converter-aware design and introduces several design practices; i) power converter basics and the conversion efficiency, ii) power converter voltage transition overhead, iii) power converter-aware design of embedded systems, and iv) maximum energy transfer of energy harvesting devices.

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Energy harvesting by sweeping voltage-escalated charging of a reconfigurable supercapacitor array

Cited by 16 publications

References 14 publications

Energy Harvesting Sources, Storage Devices and System Topologies for Environmental Wireless Sensor Networks: A Review

Energy Harvesting Sources, Storage Devices and System Topologies for Environmental Wireless Sensor Networks: A Review

Energy harvesting from anti-corrosion power sources

Power Converter-aware Design of Electronics Systems

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