NGK began R&D of NAS Battery in 1984 and commercialized it on 2002.
Originally, the principle of sodium sulfur battery was released in the United States, and it led to various trials in the US, Europe as well as Japan for the development of battery to be utilized for electric automobile or energy storage system.
NGK started the development of Beta Alumina electrolyte utilizing the expertise of fine ceramic technologies in 1984, and extended it to the development of NAS (sodium sulfur) battery in 1989, jointly with TEPCO.
It resulted in the only success of commercialization in 2002 and up to now NAS is the most-used large scale battery in the world.
NAS and the NAS logo are trademarks of NGK INSULATORS, LTD., registered in the U.S. and other countries.