Getting rid of the backup battery in autonomous IoT devices

Paul van Gerven
Leestijd: 1 minuut

Researchers from Delft University of Technology (TU Delft) and Northwestern University have developed a system that enables battery-free devices to keep time despite power interruptions. This could mean that autonomous IoT devices that harvest their energy from the environment wouldn’t need to be fitted with a backup battery anymore.

If you make their energy requirements low enough, IoT devices could power themselves with energy from (a combination of) light, heat or movement in the environment. But this energy supply isn’t quite steady enough, causing brief but frequent losses of power. Without a backup battery, these devices would therefore be rebooting so much they’d essentially be useless.

This is no different in the newly-developed system for batteryless devices, but with a crucial difference: the time and state of the device right before the power outage can quickly be reconstructed. So quickly, in fact, that the loss of power may even go unnoticed.

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