The World's First Half-Solid State ESS Battery Production Line Commences Operation! On March 27, the half-solid state battery production line of Highstar WELION New Energy Technology Co., Ltd. in Zhuhai officially commenced operation. Located at the Highstar New Energy Base in Zhuhai, this production line was jointly established by Guangdong Energy Group and Beijing WELION New Energy Technology Co., Ltd. to form Guangdong WELION Energy Technology Co., Ltd. The 314Ah square-shaped half-solid state battery produced this time is the world's first 1kWh-level single cell battery that exhibits no smoke emission upon 5mm needle penetration, featuring both long cycle life and high safety performance.