Get Small: How to Design Implantables with Solid-State Batteries

A novel technique for stacking and interconnecting solid state cells was shown to significantly increase the energy density and decrease the internal resistance of the battery stack. This development could enable further development of next-generation neuro-stimulation devices by providing an energy source of minimal size (mm-scale footprint and um-scale thickness), appropriate energy density for increasing functionalities and long life avoiding the risk and cost of removal

Main takeaways from the presentation:

  1. The requirements of medical sensing devices (implantable and non-implantable) in terms of their size and shape; lifecycle; cost; safety and bio-compatibility) and technical performance (ability to provide energy and power for sensing, communications, data storage)

  2. A review of alternatives for powering such devices autonomously including a comparison of the specifications for the power sources: coin cells, cylindrical batteries, solid state batteries, lithium polymer batteries, other chemistries (Silver-Zinc…), super-capacitors

  3. Alternative for charging these power sources wirelessly through induction or harvested energy