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Communication Dans Un Congrès Année : 2016

Self-Adaptive Switched Architecture for Ultra-Capacitors Storage

Résumé

Energy autonomy is a major barrier to the deployment of wireless sensors networks in many applications. Ambient energy harvesting and storage is a way to enhance this autonomy. Moreover, in some applications with harsh environment (extreme temperatures) or when a long service liftime is required, the use of batteries for storage is prohibited. Ultra-capacitor provide in this case a good alternative for a energy storage. This type of 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 ultra-capacitors. The initial structure (series) allows a small capacitance to be connected to the source of energy (energy harvesting) at charge starting. The ultra-capacitors are then reconfigured. The final architecture (parallel) insures a maximal energy storage. This adaptive architecture enables a trade off between the charge time constant, the maximum voltage, the autonomy of the system and the maximum energy utilization rate.
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Dates et versions

hal-01497557 , version 1 (28-03-2017)

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  • HAL Id : hal-01497557 , version 1

Citer

Firdaous El Mahboubi, Marise Bafleur, Vincent Boitier, Jean-Marie Dilhac. Self-Adaptive Switched Architecture for Ultra-Capacitors Storage. Journées Nationales sur la Récupération et le Stockage d'Energie (JNRSE’2016) , Université de Bordeaux, May 2016, BORDEAUX, France. 4p. ⟨hal-01497557⟩
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