Micro-power generation and storage
This program investigates novel technologies for generating and storing power on the micro-scale. It focuses on concepts that can be realized in standard silicon-based industrial MEMS production processes, opening up the potential for low-cost manufacturing. Targeting power densities of the order of 100 µW / cm2, it will lead to smaller wireless transducer systems that can do more, go anywhere and need less maintenance.
In power generation, the main focus is on ‘harvesting’ unused ambient energy such as body heat and stray light. In particular, we are investigating:
- Energy harvesting concepts
- Thermal
- RF
- Mechanical / vibration
- Small, indoor photvoltaics
In each case, the underlying concept and eventual implementation depends heavily on the end application. This ensures the best use of the resonant frequencies (vibrational), frequency spectra (RF and photovoltaic) or temperature gradients (thermal) specific to each application.
The program also analyzes energy storage systems (ESS) such as micro-sized batteries, super capacitors and fuel cells. This includes testing and benchmarking for partners, and advice for commercial battery suppliers.
The ultimate goal is micro-power modules that can be easily integrated into complete sensor node designs. So we are investigating ways to integrate the ESS with the energy scavenger and antenna into micro-power modules that may include multiple harvesting modes (e.g. thermal and photovoltaic). For the most promising concepts, we build fully integrated demonstrators including power generation, conditioning, storage and management systems.