BB25.C Energy storage for WSNs


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Title Energy storage for WSNs
Page Title BB25.C Energy storage for WSNs
Technology Line Autonomy of Devices/Energy Efficiency of WSN
Lead partner Acciona
Leader Rafael Socorro
Contributors UiO, Acciona, Tecnalia
Related to Use Cases SCOTT:WP12, SCOTT:WP17
Description Piezoelectric, solar and thermal energy harvesting for hybrid low- power generator systems with thin-film batteries in the rail domain: to develop a hybrid power generator and storage system using these three sources of energy in order to improve both structural multifunctionality and system-level robustness in energy harvesting.
Main output Short-term energy storage for wireless sensor networks: To avoid the lifetime limitation of traditional secondary battery technologies in these systems, energy harvesting architectures with short-term energy storage can be chosen. These technologies offer long shelf-life and many recharge cycles, but can buffer for only short periods of time due to their small storage capacity. We will analize some of these short-term energy storage devices: namely double layer capacitors and thin-film batteries.

Long-Term: Low-Maintenance. The elimination of battery maintenance and replacement costs will enable further adoption of wireless sensor technology. End users will be able to monitor high value assets for the long term, eliminating critical failures and optimizing process operations . Moreover, it will open the door for creative exploration of new sensorapplications in rail domain.

BB category Methodology (for SW/HW development), SW component, HW component
Baseline Batteries and supercapacitors are popular choices of storage device, but neither represents the ideal solution, with, supercapacitors possessing low energy densities while batteries have low power density. When using a battery-only solution for storage, the runtime of a typical sensor node is typically reduced by the battery’s relatively high internal impedance and thermal loss. Supercapacitors can overcome some of these problems, but generally do not provide sufficient long-term energy to allow aircraft health monitoring applications to be operated over an extended period. A hybrid energy storage solution can provide both energy and power density to a wireless sensor node.
Current TRL 4
Target TRL 6