Patent filing marks start of roll to roll flexible solid state battery roll out

April 15, 2020 // By Nick Flaherty
A roll-to-roll process developed by ThinFilm Electronics builds flexible solid state battery cells up to 60 microns thick on a steel substrate.
A roll-to-roll process developed by ThinFilm Electronics builds flexible solid state battery cells up to 60 microns thick on a steel substrate.

ThinFilm Electronics in Norway has filed several patents for a flexible solid-state lithium battery technology (SSLB) for wearable devices and connected sensors that can be made on a low cost rool-to-roll process

The filings cover the encapsulation, assembly, and stacking of SSLB cells on stainless steel substrates for milliamp hour batteries. These have the highest volumetric energy density in their class, says Thinfilm, extending battery life for thinner wearable devices and IoT sensors.

Beyond the manufacturing technology, Thinfilm has also filed patents based on the core battery technology, including solid-state battery materials and cell stack design. A key advantage of the technology is that it can be stacked to provide tens of milliamp hours of capacity and are between 20 and 65μm thick.

This is the first step in the roll out of the technology. The company is working on samples for delivery by June and designs with two customers by the end of the year.

The company previously developed a flexible transistor design and has pivoted to solid state battery technology. It has its corporate headquarters in Oslo and global headquarters with an H-Class cleanroom for production in San Jose, California.

“Thinfilm’s solid-state lithium battery strategy builds upon our company’s established manufacturing expertise to produce a new class of batteries for innovative applications. These filings illustrate Thinfilm’s commitment to innovation throughout the energy storage space, including core battery technology, cell manufacturing, and cell packaging and stacking,” said Kevin Barber, CEO of Thinfilm. “Our technical team is well positioned to continue innovation to enable new classes of wearable devices and connected sensors.”

Thinfilm is preparing additional patent filings in new and adjacent areas to expand the Company’s IP portfolio in SSLB design and manufacturing.

www.thinfilmsystems.com

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