[CATL and AESC Take the Lead in Mass-Producing 500+Ah ESS Battery Cells, Ushering in a New Era!] During the 500+Ah ESS battery cell competition held on May 29, AESC and CATL demonstrated their outstanding capabilities. AESC's Cangzhou Mega Factory successfully rolled out the first 500+Ah ESS battery cells, becoming the first enterprise globally to achieve mass production.