comment on this article

Smart microchip can self-start and operate when battery runs out

Associate professor Massimo Alioto (centre) and his team have developed a smart microchip, BATLESS which can self-start and continue to operate even when the battery runs out of energy

Engineers from the National University of Singapore (NUS) have developed a microchip, known as BATLESS, that they claim is able to continue operating even when the battery runs out of energy.

Using a small, on-chip solar cell, NUS say that BATLESS is able to self-start and continue to function under dim light without any battery assistance. The team believe this will lead to cheaper batteries which are 10 times smaller than current batteries required to power IoT sensor nodes.

Battery indifference is the ability for IoT devices to continue operations, even when the battery is exhausted. It is achieved by operating in two different modes – minimum-energy and minimum-power. When the battery energy is available, the chip runs in minimum-energy mode to maximise the battery lifetime.

However, when the battery is exhausted, the chip switches to the minimum-power mode and operates with a tiny power consumption of about half a nanoWatt – this is about a billion times smaller than the power consumption of a smartphone during a phone call. Power can be provided by a very small on-chip solar cell that is about half a square millimetre in area, or other forms of energy available from the environment, such as vibration or heat.

The BATLESS microchip can uninterruptedly sense, process, capture and timestamp events of interest, and allows data to be wirelessly transmitted to the Cloud when the battery becomes available again.

Despite being in minimum-power mode when battery is not available, the team say the reduced speed of the microchip is still adequate for numerous IoT applications that need to sense parameters that vary slowly in time, including temperature, humidity, light, and pressure.

Associate professor Massimo Aliotoof NUS, says: “In minimum-power mode, BATLESS uses 1,000 to 100,000 times less power, compared to the best existing microcontrollers designed for fixed minimum-energy operation. At the same time, our 16-bit microcontroller can also operate 100,000 times faster than others that have been recently designed for fixed minimum-power operation.”

BATLESS is also designed to enable operations to be self-started while being powered directly by the tiny on-chip solar cell, with no battery assistance.

The NUS researchers are now exploring ways to build complete battery indifferent systems that cover the entire signal chain from sensor to wireless communications, expanding the current work on microcontrollers and power management.

The team aims to demonstrate a solution that shrinks battery to millimetres, with the long-term goal of completely eliminating the need for it at all.

Author
Bethan Grylls

Comment on this article


This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:


Add your comments

Name
 
Email
 
Comments
 

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Safer batteries

Rice University scientists have taken the next step toward the deployment of ...

Data mining

Together with his team, Karsten Reuter, Professor of Theoretical Chemistry at ...

USB Type-C charging

Global Connector Technology (GCT) has launched the USB4085, a USB Type-C ...

Smart Home Expo

The Smart Home Expo, which focuses on the future of smart technologies, ...

Get to market faster

A quick look at using Vicor's PFM and AIM in VIA packaging for your AC to Point ...

Semiconductor boom

Compared to an ailing steel industry, just a few years ago, the semiconductor ...

A racing certainty

AI has shaken the automotive industry to its core, inspiring a revolution. ...

Planning pays off

Described as a one-stop shop Plexus provides companies with engineering, ...