Minmetals Securities·2025-12-01 04:15Investment Rating - The report rates the electrical equipment industry as "Positive" [5] Core Insights - The core challenge in the engineering of all-solid-state batteries lies in pressure management, which is crucial for ion conduction and material contact [2][15] - The initial pressure and stacking pressure are critical factors affecting battery performance, with low stacking pressure being essential for stable operation [2][49] - The report anticipates demonstration vehicle applications for all-solid-state batteries by 2027, with consumer scenarios potentially starting earlier [2] Summary by Sections 1. Core Challenges in All-Solid-State Battery Engineering - The primary difficulty is managing pressure to ensure effective solid-solid contact, which is essential for ion conduction [15] - Initial pressure during manufacturing and maintaining stacking pressure during operation are both critical to battery performance [15] 2. Initial Pressurization in All-Solid-State Batteries - Initial pressure helps achieve material densification, which is vital for solid-solid interface contact [26] - Key processes include roller pressing, isostatic pressing, and high-pressure formation, with isostatic pressing showing significant potential [26][29] 3. Stacking Pressure in All-Solid-State Batteries - Maintaining appropriate stacking pressure is necessary to address challenges such as uneven interface contact and lithium dendrite growth [49] - Low stacking pressure is a trend in the industry, with a consensus target below 10 MPa, and automotive applications suggesting even lower limits [51][52] 4. Relevant Industry Chain and Progress - Investment opportunities are identified in roller pressing, isostatic pressing, high-pressure formation equipment, and in materials such as sulfide and composite electrolytes [3][9]