日经BP精选：全固态电池量产竞争：日本出光征途过半，中企入局掀起风暴

Core Viewpoint - The article discusses the advancements in solid-state battery technology, particularly the collaboration between Idemitsu Kosan and Toyota, and the competitive landscape involving Chinese companies like BYD aiming for mass production by 2027 [5]. Group 1: Industry Overview - Solid-state batteries are gaining attention as a next-generation technology to address the limitations of pure electric vehicles (EVs) [5]. - The key feature of solid-state batteries is that they use solid electrolytes instead of liquid ones, resulting in higher energy density compared to conventional lithium batteries [5]. - The advantages of solid-state batteries include extended EV range, reduced charging time, and improved safety [5]. Group 2: Company Developments - Idemitsu Kosan is actively developing solid-state batteries and is close to practical application in collaboration with Toyota [5]. - BYD, a Chinese company, plans to attempt equipping vehicles with solid-state batteries by 2027, indicating a competitive push in the market [5].