scholarly journals A Wirelessly Rechargeable AA Battery Using Electrodynamic Wireless Power Transmission

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2368
Author(s):  
Spencer E. Smith ◽  
Miah A. Halim ◽  
Stasiu T. Chyczewski ◽  
Adrian A. Rendon-Hernandez ◽  
David P. Arnold

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 µTrms (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.

2011 ◽  
Vol E94-B (11) ◽  
pp. 3172-3174 ◽  
Author(s):  
Takashi MARUYAMA ◽  
Tatsuya SHIMIZU ◽  
Mamoru AKIMOTO ◽  
Kazuki MARUTA

2019 ◽  
Vol 7 (2) ◽  
pp. 244-248
Author(s):  
SK.Abbas . ◽  
P.Jyothi Swaroop ◽  
M. Swathi Priyanka ◽  
R.Dinesh .

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