A Wirelessly Rechargeable AA Battery Using Electrodynamic Wireless Power Transmission

Spencer E. Smith, Miah A. Halim, Stasiu T. Chyczewski, Adrian A. Rendon-Hernandez and David P. Arnold
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Spencer E. Smith: Interdisciplinary Microsystems Group (IMG), Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA
Miah A. Halim: Interdisciplinary Microsystems Group (IMG), Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA
Stasiu T. Chyczewski: Interdisciplinary Microsystems Group (IMG), Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA
Adrian A. Rendon-Hernandez: Interdisciplinary Microsystems Group (IMG), Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA
David P. Arnold: Interdisciplinary Microsystems Group (IMG), Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA

Energies, 2021, vol. 14, issue 9, 1-14

Abstract: We report the design, fabrication, and characterization of a prototype that meets the form, fit, and function of a household 1.5 V AA battery, but which can be wirelessly recharged without removal from the host device. The prototype system comprises a low-frequency electrodynamic wireless power transmission (EWPT) receiver, a lithium polymer energy storage cell, and a power management circuit (PMC), all contained within a 3D-printed package. The EWPT receiver and overall system are experimentally characterized using a 238 Hz sinusoidal magnetic charging field and either a 1000 µF electrolytic capacitor or a lithium polymer (LiPo) cell as the storage cell. The system demonstrates a minimal operating field as low as 50 µT rms (similar in magnitude to Earth’s magnetic field). At this minimum charging field, the prototype transfers a maximum dc current of 50 µA to the capacitor, corresponding to a power delivery of 118 µW. The power effectiveness of the power management system is approximately 49%; with power effectiveness defined as the ratio between actual output power and the maximum possible power the EWPT receiver can transfer to a pure resistive load at a given field strength.

Keywords: AA battery package; electrodynamic wireless power transmission (EWPT); lithium polymer cell; power management (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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