Panasonic Announces World’s Smallest Pin Shaped Rechargeable Lithium Ion Battery
Panasonic has developed a Pin Shaped Lithium Ion Battery (CG-320, nominal capacity 13mAh) with a diameter of 3.5mm and a weight of 0.6g suitable for powering small devices such as wearable devices. This product, on top of being the industry’s smallest cylindrical shaped rechargeable Lithium Ion battery, features the high reliability and high output required for near-field communications (NFC). Panasonic CG-320 is on display at CEATEC JAPAN 2014.
The world’s smallest diameter cylindrical rechargeable battery Panasonic CG-320 has been developed by using extremely fine components and materials compared to current cylindrical lithium ion batteries, and also by applying the know-how and technology cultivated during the high precision manufacturing process of small coin-shaped batteries. This product is also the smallest in the industry in terms of capacity by volume, at one twentieth of an AAA size battery (Diameter 10.5mm, Height 44.5mm). This size is suitable as a power source for small devices such as spectacles-shaped, pen-shaped and other slim devices. Design options can be expanded for these types of communication devices.
Despite the very thin diameter of 3.5mm, the same spiral electrode construction used in current cylindrical Lithium Ion batteries is employed, allowing a wide area between the cathode and anode and resulting in high output. By succeeding in developing this electrode construction at such a small size, it is possible to use similar materials and achieve high voltage (3.75V) as is seen in current lithium ion batteries. A high-strength stainless steel can is used for the exterior. This technology stabilizes the battery dimensions, preventing swelling and allows for confident use of this highly reliable battery. Mass production and shipping are planned to begin in February 2015 with a monthly production of one hundred thousand units.