Panasonic Corp exhibited a flexible lithium-ion (Li-ion) rechargeable battery that can be attached to human body and clothes and embedded in cards at Ceatec Japan 2017, which took place from Oct 3 to 6, 2017, at Makuhari Messe in Chiba Prefecture, Japan.

The flexible battery was first announced in September 2016. But, this time, Panasonic reduced its thickness by 0.1mm and demonstrated wireless charging of the battery.

Panasonic's flexible battery that can be bent up to a radius of 25mm

The thickness of the exhibited battery is 0.45mm. If a UBS port, etc is added to the battery for charging, the advantage of the slim battery is lost. So, it is best to wirelessly charge the battery, Panasonic said.

The cell is equipped with a power-receiving coil, and the battery is expected to be wirelessly charged.

The cell of the battery has the same composition as that of conventional Li-ion rechargeable batteries. It is a laminated type made by stacking positive and negative electrode materials and separators.

The voltage and charging voltage of the battery are 3.8V and 4.35V, respectively. It can be bent up to a radius of 25mm (R25) and twisted up to an angle of ±25°.

Panasonic expects the battery to be attached to human body and clothes for medical and health management purposes.

At the trade show, Panasonic showed three models whose capacities are 18, 42 and 65mAh, respectively. The company is providing samples of the battery, but the battery has not been employed yet.

Panasonic exhibited three types of cells with different capacities.

Original Japanese article