The EnerCera battery is categorized as semi-solid-state battery, with performance equal to or better than that of a conventional lithium-ion rechargeable battery. The EnerCera battery’s heat resistance characteristics are comparable to those of all-solid-state batteries.

FREMONT, CA: NGK INSULATORS has raised the maximum operating temperature of its coin-type “EnerCera Coin” (part of the “EnerCera” series) battery up to 105 degrees Celsius. Sample shipments are at the moment underway, with mass production scheduled to start in September 2020.

In December 2019, NGK developed the world’s first lithium-ion rechargeable battery that has achieved an operating temperature range of -40 to +85 degrees Celsius. As a consequence of improvements to the product on the basis of customer feedback, NGK recently succeeded in increasing the upper limit of the operating temperature by 20 degrees. The battery can now be used at an operating temperature of up to 105 degrees Celsius, while still maintaining power and capacity. In its fully charged state, when the battery is most prone to deterioration, the capacity reduction is less than 20 percent even after it is kept at 105 degrees for 1000 hours.

NGK’s EnerCera Coin battery has a distinctive structure in which a small amount of electrolyte is added to its all-ceramic stacked monolithic body with electrodes and a separator. This offers high thermal stability. The EnerCera battery is categorized as semi-solid-state battery, with performance equal to or better than that of a conventional lithium-ion rechargeable battery. The EnerCera battery’s heat resistance characteristics are comparable to those of all-solid-state batteries.

Additionally, EnerCera Coin provides flexibility in installation. It can be mounted on a circuit board by reflow soldering that is a common process for mounting electronic components on board. However, the battery 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 implanted into the resin structure. This enables the realization of an electronic device with unprecedented design and robustness.

Iwao Ohwada, Vice President at NGK commented, “development of high heat resistance products was realized through feedback from various partners in the automotive, industrial, logistics and smart card industries. We will continue to work closely with our partners to develop innovative solutions that accelerate the spread of IoT solutions.”