TDK Rechargeable solid-state SMD battery

The TDK CeraCharge™ is the first solid-state rechargeable battery in compact SMD technology. Depending on requirements, the number of charge/discharge cycles this battery is able to perform ranges from several dozens to up to 1000. With its compact EIA 1812 package (4.5 mm x 3.2 mm
x 1.1 mm) it offers a capacity of 100 µAh at a rated voltage of 1.4 V. Apart from its rated current of 100 µA, the battery is also capable of delivering currents in the order of several mA for short periods. Thanks to the SMD technology, placement of the battery is easy and it can be processed using reflow soldering techniques, which in turn reduces the production cost of the end product.

In contrast to most common technologies, CeraCharge is a solid-state rechargeable battery with no liquid electrolyte. The battery is based on a multilayer technology, similar to MLCCs.

This means that a relatively high energy density and smallest volume are combined with the safety and high volume manufacturing benefits of ceramic multilayer components. In addition, the use of a solid ceramic element as an electrolyte rules out the risk of fire, explosion, or leakage of liquid electrolyte.
To increase the capacity and the voltage, any number of individual CeraCharge components can by connected in parallel. This opens up a wide range of possible applications – particularly in devices intended for the Internet of Things. These include, for example, realtime clocks, Bluetooth beacons, wearables or systems for energy harvesting.