Surface mount ceramic battery targets the Internet of Things

November 12, 2018 // By Nick Flaherty
Surface mount ceramic battery targets the Internet of Things
NGK Insulators in Japan has developed a small, thin and high-energy-density ceramic secondary battery as a constant voltage power source for the Internet of Things (IoT)

The EnerCera batteries are compatible with high-temperature Installation on a circuit board or in a smartcard. Mass production will start in April 2019.

EnerCera is a Li-ion secondary battery with NGK's Crystal Oriented Ceramic Plate as electrodes. The Crystal Oriented Ceramic Plate is composed of just an active material and it contains no organic binder or conductive material which exists in a Li-ion battery normally but does not contribute to battery capacity. This doubles the energy density and halves the internal resistance with a small and thin body for operating ICs, sensors and a wireless communication system which needs large current such as several 10 mA to several 100 mA. Constant Voltage (CV) charging eliminates the need for a charger IC to control the charge current.

There are two types of battery, from a coin cell, 1 mm to 2 mm thick, for mounting on a circuit board, to a bendable pouch cell, 0.4 mm to 0.45 mm thick, for embedding in a card. NGK says EnerCera Coin is the world's first surface mount device (SMD) Li-ion battery which can be mounted by a solder reflow process and has a high discharge current property sufficient to operate devices, although other solid state batteries have been launched for SMD processes. Similarly EnerCera Pouch is the world's first thin-type Li-ion battery which can be embedded by hot lamination (above 100 ºC) used widely in the IC card production. The EnerCera Pouch lineup has a fast charging type, a high-capacity type and a high-power type for customers' various device designs.

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