Power Sources

Rechargeable Ceramic Multilayer SMD Battery in EIA 1812 Package

TDK Corporation presents CeraCharge™ – the first solid-state rechargeable battery in 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 x 3.2 x 1.1 mm) it offers a capacity of 100µAh at a rated voltage of 1.4V. This battery is also capable of delivering currents in the order of several mA for short periods.

As a result of 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.

Comparison of solid-state battery technologies (click on table to enlarge)

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.

(click on table to enlarge)

To increase the capacity and the voltage, any number of individual CeraCharge components can be connected in series and parallel. This opens up a wide range of possible applications – particularly in devices intended for the Internet of Things.

These include, for example, real-time clocks, Bluetooth beacons, wearables or systems for energy harvesting.

Discharge curves (click on image to enlarge)

Samples of CeraCharge 1812 will be available in December 2017. Mass production is slated for Spring 2018. And a smaller 0603 type is under development with introduction anticipated later in 2018.

TDK Corporation
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