Rechargeable Lithium-ion Batteries For Wireless Smart Designs

F. Fusalba
CEA-LITEN, FR

Keywords: batteries, Li-ion, extrem conditions, space, aeronautic, beacons, wireless, sensors

Summary:

Wireless communication is today considered as a disruptive technology. Indeed, even if wired systems can easily achieve 100% of reliability, it induces high amount of wiring, which has non negligible impact on the mass and so on the lifetime. But such systems need embedded energy. These considerations have led CEA to engage the development of miniature and autonomous Li-ion batteries, in order to demonstrate the validity of wireless technology concept adapted to various environments including the space, the aeronautic or the building ones. In this lecture several Li-ion batteries prototypes will be shown and their performances in space, aircraft flights, cold environments or harvesting conditions will be discussed. They were designed taking into account environment constraints such as temperature, gravity, vacuum and vibrations. Conditions where very high energy density with very low cyclelife (< 50-100 cycles), high lifetime (10-15 years), operating in high temperature (above 150°C) or low temperature (down to- 40°C, -60°C), withstanding vacuum or very low pressure with extra thin configuration and/or flexible, very small 3D dimensions were specified and batteries solutions were developed & proposed. New chemistries for higher energy density, above 250Wh/kg, or low temperature operating electrolytes, below -20°C, are also introduced.