Self-Powered Adaptive Switched Architecture Storage

16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Mahboubi, F. El^1 ; Bafleur, M.^1 ; Boitier, V.^1 ; Alvarez, A.^2 ; Colomer, J.^2 ; Miribel, P.^2 ; Dilhac, J.-M.^1

LAAS-CNRS, Université de Toulouse, CNRS, INSA, UPS, Toulouse, France^1

University of Barcelona, Barcelona, Spain^2

关键词: Energy autonomies;    Harsh environment;    Residual energy;    Service lifetime;    Switched architecture;    Time constants;    Ultracapacitors;    Wireless sensors networks;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/773/1/012103/pdf
DOI  :  10.1088/1742-6596/773/1/012103

来源: IOP

【 摘 要 】

Ambient energy harvesting coupled to storage is a way to improve the autonomy of wireless sensors networks. Moreover, in some applications with harsh environment or when a long service lifetime is required, the use of batteries is prohibited. Ultra-capacitors provide in this case a good alternative for energy storage. Such storage must comply with the following requirements: a sufficient voltage during the initial charge must be rapidly reached, a significant amount of energy should be stored and the unemployed residual energy must be minimised at discharge. To answer these apparently contradictory criteria, we propose a selfadaptive switched architecture consisting of a matrix of switched ultra-capacitors. We present the results of a self-powered adaptive prototype that shows the improvement in terms of charge time constant, energy utilization rate and then energy autonomy.