NGK Develops Heat Resistant Lithium-Ion Coin Battery

NGK, the spark plug manufacturer, has developed a coin cell battery with a much higher thermal tolerance intended for use in automotive sector and IoT devices. Called the EnerCera Coin, part of the EnerCera series, this coin-type battery is able to work at temperatures as high as 105 degrees Celsius, significantly higher than that of what’s currently available.

In its fully charged state, when the battery is most prone to deterioration, capacity decrease is less than 20%, even after it is kept at 105 degrees for 1000 hours. This tolerance to higher temperatures allow for better flexibility in installations.

According to NGK, here’s where the extra ceiling limit is beneficial:

• The Battery can be mounted on a circuit board by reflow soldering, which is a common method for mounting electronic components on a board.
• It can also be mounted through injection molding, where molten resin with temperatures of up to 300 degrees is poured into the mold and the battery directly embedded into the resin structure.

NGK’s coin battery comprises of a small amount of electrolyte is added to the ceramic stacked monolithic body with electrodes and a separator. This EnerCera is categorized as a semi-solid-state battery that that offers comparable heat resistance characteristics to all-solid-state ones.

According to the company, it also offers equivalent or better performance than conventional lithium-ion rechargeable batteries. Mass production of the new EnerCera is already begun with scheduled deliveries to customers slated for September 2020.