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03/28/2023 - 03/28/2023 | Berlin

Session series »Low-Power Systems«

#3: Revolutionizing Low-Power Devices: Microbatteries offer High Performance

Fraunhofer IZM develops and produces prototype series of very small micro batteries. The expert session will give an insight how parameters such as voltage, current capability, temperature and cycle stability, as well as the footprint and interconnection method can be tailored to the application profile. In our 45-minutes expert sessions we would like to present to you the trending topics in a technical presentation.

Speaker: Dr. Robert Hahn

This session focuses on micro-batteries with dimensions in the range of 1x1 mm2. Such batteries are the basis for the smallest energy-autonomous sensors, future products like smart contact lenses with integrated displays and in-the-ear hearing aids with a new operating principle. The smallest data loggers and battery-powered RFID will also benefit from the technology. Battery materials with high energy density and cycle stability are used.

Sub-millimetre lithium-ion batteries can no longer be produced using established manufacturing technology. Production will be semi-automated in a clean room. Silicon is the key to miniaturisation. It allows much higher precision. Silicon structuring technology - deep reactive ion etching - makes it possible to produce very small and thin-walled battery casings, so that even with dimensions in the millimetre range there is still a large volume available for the active battery material. Using wafer carrier technology, thousands of batteries can be lidded and hermetically sealed simultaneously.

When selecting the battery technology, a number of different electrodes are available, resulting in different nominal voltages and affecting other parameters. Key characteristics such as current and pulse capability, self-discharge and deep discharge behaviour are demonstrated.

Our micro-battery is a key component of the electronic backpack worn by bees in the Sens4Bee collaborative research project. The aim of the project is to collect data on bee behaviour and environmental sensing. The battery is charged by a solar micro-panel. An RFID tag, a data logger and some sensors are also part of the electronic backpack. The size of the battery is 1.5x3 mm2 and the total weight of the electronic module is ten milligrams including the battery.

The latest hearing aids can be applied directly to the eardrum, similar to a contact lens for the eye. The start-up Vibrosonic has proven this with its hearing contact lens. It consists of an actuator that acts directly on the eardrum. The hearing aid has such low energy consumption that a micro battery of our type can be used. In the next innovation step, the entire electronics including the battery are integrated with a solar cell as a hearing contact lens and applied in the ear. The charging is done by an earplug with infrared radiation. This poses a major challenge to the battery's fast-charging capability.

Fraunhofer IZM stands for application-oriented, industry-focused research.
With its technology clusters in the field of wafer and substrate process technology as well as its high competence in simulation and metrology, Fraunhofer IZM covers the entire range required for the realization of reliable electronics and their integration into applications.

With our expert session series we want to introduce you to the world of low-power systems. Energy efficiency is becoming increasingly important in all aspects - low-power is one of the most important challenges in electrical engineering as well. Especially when a device has to be mounted in places that are difficult to access or has to operate without power for a longer period of time, it requires low-power consumption. In view of the complexity of the systems, the area is very challenging, as the trend is moving towards higher chip densities and higher frequencies. Therefore, it is important to face this issue and to develop appropriate solutions. Fraunhofer IZM has been working on the advancement of those systems and with the adoption of this technology in more and more applications. We'd like to give you an insight into the technology behind some application benefitting from these properties.

Mre information:

Information on participating / attending:
Participation is free of charge, registration is required. This workshop series aims to address our customers, partners and interested parties from industry, politics and science.


03/28/2023 16:00 - 03/28/2023 16:45

Event venue:

Online I MS Teams
13355 Berlin

Target group:

Business and commerce, Scientists and scholars


transregional, national

Subject areas:

Electrical engineering, Energy, Information technology, Media and communication sciences, Traffic / transport

Types of events:

Seminar / workshop / discussion




Susann Thoma


Presse- und Öffentlichkeitsarbeit

Event is free:


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URL of this event:

attachment icon Event Info #3 Online lecture »Revolutionizing Low-Power Devices with Microbatteries«


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