A Next-Gen Battery for Smartwatches, Wireless Headphones & More
Published 15 July 2024
In Sustainable Automotive Design, we noted solid-state technology as a promising frontier in battery development. While its application in electric vehicles (EVs) faces challenges, Japanese battery maker TDK has achieved a breakthrough in smaller coin cell solid-state batteries for potential use in consumer electronics.
TDK, an Apple battery supplier, has announced that it reached a new milestone with its solid-state battery technology, offering more than 100 times the energy density of its current solution. Unlike traditional batteries that use liquid or gel electrolytes, solid-state batteries employ a solid electrolyte, potentially providing benefits like decreased flammability, increased density, longer lifespans and, in some cases, faster charging.
The solid-state battery solution boasts an energy density of 1,000 watt-hours per litre (Wh/L) – compared with the 400 Wh/L offering by traditional coin cells – targeting use in wearable devices, such as wireless headphones, hearing aids and smartwatches. The company aims to replace existing coin cell batteries with this innovative solid-state alternative and is working towards mass production.
TDK chief executive Noboru Saito emphasised the importance of innovation. “We need to assume other companies will come into this space, and we need to develop the next, followed by the next, technology to differentiate ourselves and keep our lead from shrinking,” he said. Smart battery brands, including in the automotive space (see Sustainable Automotive Design), are looking to futureproof their production by innovating in sustainable materials and practices as well as using adaptable power sources.
For more on the technologies set to impact the future of everyday devices, see Consumer Electronics Trends: 24/25.
