Thin Film Electronics, a developer of ultrathin, flexible, and safe energy storage solutions for wearable devices and connected sensors, unveiled the next phase of its strategy to support the commercialization of the company’s premium microbattery products based on solid-state lithium battery (“SSLB”) technology.
To support the microbattery needs of its target markets, Thinfilm has launched development of its innovative product platform based on the Company’s core SSLB technology and has completed the design of the first product optimized for its initial target markets. This microbattery product, optimized for form-factor-constrained applications such as hearing aids, earbuds, and wearable medical devices, prioritizes market requirements validated in a series of substantive business and technical conversations with market leading OEMs.
The company can now announce that Thinfilm’s go-to-market initiatives have resulted in signed technology evaluation agreements with potential customers and partners. As the company proceeds toward commercialization and scale-up of its SSLB technology, leveraging its existing roll-to-roll facility, it has prioritized those engagements with the greatest potential to leverage the energy density, form factor, and cycling advantages of the core product platform. In parallel, the company’s go-to-market team is engaging global market leaders in additional categories, such as wearables and defense, where Thinfilm SSLB advantages address the limitations of legacy battery technologies.
Thinfilm’s premier ultrathin microbattery is enabled by the company’s enhanced SSLB product platform. The company’s technologists have continued to optimize the core SSLB technology platform, including processes, materials, and tools, to target leading microbattery energy densities up to 600 Watt-hours per liter and cycling performance in excess of 1000 charge-discharge cycles. By delivering double the volumetric energy density of legacy lithium-ion coin and button cells, Thinfilm SSLB products could occupy 50% less space and enable thinner, more comfortable hearables and other wearable devices.
In addition, the expected rating of 1000 charge/discharge cycles – compared to 300-400 cycles achieved by common lithium-ion devices – means Thinfilm-enabled products could enable overnight charging of hearing aids, earbuds, and other daily-use items over the multi-year lifetimes required to both satisfy demanding consumers and minimize warranty repair costs due to premature battery failure. Furthermore, to address the safety expectations of consumers, manufacturers, and regulators – particularly for on-body wearable and medical electronics – Thinfilm SSLB technology practically eliminates two major safety risks associated with common lithium rechargeable batteries: thermal runaway, which can lead to excessive heat, fire, and even explosion; and electrolyte leakage, which can lead to toxic chemicals contacting human skin.
Although some development has taken longer than initially expected, Thinfilm has made considerable technical progress as a result of parallel innovation in all areas of battery development, including design, fabrication, and packaging. Cell-level testing has met expectations on key battery parameters, including ion conductivity and core energy density. In addition, backend process development activities, encompassing both cell stacking and package encapsulation, have resulted in innovative concepts designed to maximize energy density and maintain reliability within ultracompact footprints.
Based on the breadth and quality of customer input received in its engagements, the company will now shift focus from building general technology evaluation samples to developing specific products based on the technology platform announced today. With core technical and market building blocks in place, process optimization will continue throughout product platform development, with emphasis on cycle life consistency, increased energy density, and enhanced manufacturability necessary for production.
Furthermore, the company’s operations team has begun executing plans to bring up its roll-to-roll tools, transfer process technology from its sheet-based production line, and qualify initial roll-based SSLB products in preparation for volume delivery of batteries to customers and partners later this year and into 2022.
Thinfilm is Energizing Innovation™ with ultrathin, flexible, and safe energy storage solutions for wearable devices, connected sensors, and beyond. Thinfilm’s innovative solid-state lithium battery (SSLB) technology is uniquely positioned to enable the production of powerful, lightweight, and cost-effective rechargeable batteries for diverse applications. The company’s state-of-the-art flexible electronics manufacturing facility, located in the heart of Silicon Valley, combines patented process technology and materials innovation with the scale of roll-to-roll production methods to bring the advantages of SSLB technology to established and expanding markets.
The company targets initial revenue shipments based on this product platform, combining Thinfilm innovations in battery cell design and fabrication with novel packaging techniques, by the end of 2021.
Hordon Kim
International Editor, hordon@powerelectronics.co.kr
