Semi-solid state Li-Ion coin cell for IoT, high temperature applications

December 30, 2019 //By Jean-Pierre Joosting
Semi-solid state Li-Ion coin cell for IoT, high temperature applications
NGK INSULATORS (“NGK") based in Nagoya, Japan, has announced that it is starting mass production of “EnerCera Coin,” a coin cell type in the “EnerCera” series of power sources for IoT devices.

NGK has so far provided shipments of EnerCera Coin samples to numerous device manufacturers. This coin cell has a small and thin body, yet still has a large capacity and supports high-temperature mounting on circuit boards with reflow soldering. For these reasons, NGK expects that several device manufacturers will adopt EnerCera Coin.

NGK also announced that it has successfully developed a new high heat resistance type cell that can operate at 85 ºC, and that it will start shipping samples of this cell. This cell claims to be the first Li-ion secondary battery capable of operating at 85 ºC.

In parallel, NGK has also successfully developed a high heat resistance type cell that features a wider range of operating temperatures, and will begin shipping samples of this type. The operating temperature range for the high capacity type is from minus -40 ºC to positive 60 ºC. There were strong requests from many customers for NGK to provide an expanded operating temperature range from minus 40 degrees to positive 85 ºC — a range that corresponds to the standard operating temperature range for electronic components, ICs and other devices for automotive and industrial applications.

To do so, NGK focused on the high thermal stability of its unique battery structure (semi-solid state battery). With this structure, small amounts of liquid electrolyte are infused into multi-layered ceramic battery materials. Based on the high thermal stability afforded by this structure, NGK adopted a design that enables the cell to be operated at even higher temperatures. As a result, NGK has realized the first-ever Li-ion secondary battery with an operating temperature of 85 ºC. The high heat resistance type cell has the performance capability to maintain at least 95% of its capacity even after 1,000 charging and discharging cycles at 85 ºC. As such, it is optimal for use in automotive equipment, factory automation applications, and outdoor IoT devices.

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