Contactless battery charger with high relative separation distance and improved efficiency

Marques, Hugo; Borges, Beatriz

doi:10.1109/intlec.2011.6099786

Cited by 11 publications

(4 citation statements)

References 24 publications

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“…For a correct operation, the LTC4071 requires just two external lumped components, namely, a resistor and a capacitor (see Figure 9(b)). The aim of the capacitor is to decouple the VCC and the GND pins; according to specifications (which recommend using a capacitor higher than 0.1 F), a 10 F capacitor was used for 8 . As for IN , a resistor of 180 Ω was used.…”

Section: Batterymentioning

confidence: 99%

“…Considering these requirements, either near-field [8][9][10][11][12][13] or far-field [14][15][16][17][18][19][20][21] wireless technologies may successfully serve the purpose for both data and power transmission. Still, to guarantee a seamless integration of electronic devices and antennas in wearable and portable accessories, it is crucial to select appropriate materials and fabrication techniques.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, starting from the prototype presented in [22], a wireless battery charger for application in clothing industry is presented. In more detail, the wireless resonant energy link (WREL) proposed in this work was exploited for implementing a wireless charger [8,9] for low capacity thin-film batteries. The proposed system consists of (1) two planar resonators that were optimized and fabricated to be embedded in portable leather accessories and (2) a power management unit (PMU).…”

Section: Introductionmentioning

confidence: 99%

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A Wearable Wireless Energy Link for Thin-Film Batteries Charging

Monti

Corchia²,

Benedetto³

et al. 2016

International Journal of Antennas and Propagation

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A wireless charger for low capacity thin-film batteries is presented. The proposed device consists of a nonradiative wireless resonant energy link and a power management unit. Experimental data referring to a prototype operating in the ISM band centered at 434 MHz are presented and discussed. In more detail, in order to facilitate the integration into wearable accessories (such as handbags or suitcases), the prototype of the wireless energy link was implemented by exploiting a magnetic coupling between two planar resonators fabricated by using a conductive fabric on a layer of leather. From experimental data, it is demonstrated that, at 434 MHz, the RF-to-RF power transfer efficiency of the link is approximately 69.3%. As for the performance of the system as a whole, when an RF power of 7.5 dBm is provided at the input port, a total efficiency of about 29.7% is obtained. Finally, experiments performed for calculating the charging time for a low capacity thin-film battery demonstrated that, for RF input power higher than 6 dBm, the time necessary for recharging the battery is lower than 50 minutes.

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Section: Batterymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Wearable Wireless Energy Link for Thin-Film Batteries Charging

Monti

Corchia²,

Benedetto³

et al. 2016

International Journal of Antennas and Propagation

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show abstract

“…Wireless power transfer (WPT) via inductively coupled coils has triggered a great interest of research, related to its wide collection of applications, such as wireless power transfer to desktop peripheral [1], charging of portable consumer electronics [2,3], and implanted biomedical devices [4,5].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Printed Spiral Coils used in Wireless Power Transmission Systems for Implantable Biomedical Devices

Ezzulddin¹,

Ibrahim²

2021

Al-Rafidain J Sci

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This paper proposed a small size and efficient square-shaped printed spiral coils (PSCs) at 13.56 MHz to be used for implantable biomedical devices. Detailed modeling of PSCs is presented. A design methodology has been applied to theoretical closed-form equations using MATLAB to optimize the wireless link of a 12×12 mm2 implantable coil example with 10 mm relative distance. All results are validated with the simulation using an electromagnetic field solver HFSS 14.1. Also, the PSCs has been implemented for verification using FR4 printed circuit board. The results show that optimized coil pairs achieved efficiency up to 80% at face to face relative distance of 10 mm in the air.

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Investigation on power optimization principles for series-configured resonant coupled wireless power transfer systems

Truong¹

2019

AEU - International Journal of Electronics and Communications

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Contactless battery charger with high relative separation distance and improved efficiency

Cited by 11 publications

References 24 publications

A Wearable Wireless Energy Link for Thin-Film Batteries Charging

A Wearable Wireless Energy Link for Thin-Film Batteries Charging

Design and Implementation of Printed Spiral Coils used in Wireless Power Transmission Systems for Implantable Biomedical Devices

Investigation on power optimization principles for series-configured resonant coupled wireless power transfer systems

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