The battery storage industry can be categorized into four major groups: batteries, power conversion systems, energy management systems, and energy storage system integration. Batteries" include battery materials, battery cells, battery management system manufacturers and battery module assemblers; at present, battery manufacturers almost exclusively produce lithium batteries. The "power conversion system" covers equipment and component manufacturers of IGBTs, resistors, driver boards, power converters, filter capacitors, circuit breakers, etc. The "energy storage system integration" includes manufacturers of battery materials, battery cores, battery management systems, and battery module assemblies. "Energy Storage System Integration" is the integration of modules and software into energy storage products that can be installed in different grid applications, and the four categories are shown in Figure 1.