Self-Powered Adaptive Switched Architecture Storage

Firdaous El Mahboubi (1) , Marise Bafleur (1) , Vincent Boitier (1) , A Alvarez (2) , J Colomer (2) , Pedro Miribel (2) , Jean-Marie Dilhac (1)

1 LAAS-ESE - Équipe Énergie et Systèmes Embarqués
2 University of Barcelona

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 self-adaptive 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.

Mots clés: energy harvesting; adaptive storage

Domaines: Micro et nanotechnologies/Microélectronique

Firdaous El Mahboubi, Marise Bafleur, Vincent Boitier, A Alvarez, J Colomer, et al.. Self-Powered Adaptive Switched Architecture Storage. 16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2016), Philippe Basset, Université Paris-Est, Dec 2016, Paris, France. pp.012103, ⟨10.1088/1742-6596/773/1/012103⟩. ⟨hal-01497546⟩