Oki Embeds Li-ion Battery in Printed Circuit Board

June 06, 2010 by Jeff Shepard

Oki Printed Circuits Co Ltd. has exhibited a technology that embeds a 170µm-thick thin-film all-solid-state lithium-ion (Li-ion) rechargeable battery in a prototype 0.8mm-thick printed circuit board.

Oki’s embedded thin-film battery, which is made by Infinite Power Solutions, has an output voltage of 4.2V and a 0.7mAh capacity. The Oki printed circuits exhibited a 0.8mm-thick four-layer board embedded with the rechargeable battery and turned on and off an LED lamp. If the battery’s power can be scaled up in the future, it might also be used to power other electronic devices.

According to Oki, when the new technology is used to realize a local energy source in a system, it is possible to reduce the peak power of the entire system. As an example, it is possible to charge a battery embedded in the printed board of a module that intermittently operates in a mobile phone when no power is required for the module and make the battery discharge when a high peak power is required.

Oki plans to expand the applications of the technology in conjunction with several corporate partners, and plans to commercialize the technology in 2011.