锂电池产业链2025年中期投资策略：修复向好，聚焦固态

Group 1: Market Overview and Valuation - As of June 25, 2025, the lithium battery index has increased by 2.25% since the beginning of the year, slightly outperforming the Shanghai and Shenzhen 300 index by 1.61 percentage points. The solid-state battery index has surged by 24.86%, significantly exceeding the Shanghai and Shenzhen 300 index by 24.22 percentage points [15][16] - The overall PE (TTM) of the lithium battery sector is 24 times, indicating that the sector is still at a historical low valuation after more than three years of deep adjustments [16] Group 2: Lithium Battery Downstream Demand - The global new energy vehicle (NEV) market continues to grow, with China being the largest driving force. From January to May 2025, China's NEV sales reached 5.608 million units, a year-on-year increase of 44%, with domestic sales accounting for 84.8% [20][29] - The penetration rate of NEVs in China reached 44% in the first five months of 2025, up 3 percentage points from 2024, indicating a strong momentum in electric vehicle adoption [22] - NEV exports from China are expected to maintain growth, with 855,000 units exported from January to May 2025, a year-on-year increase of 64.6%, making NEVs a key driver of automotive exports [29] Group 3: Industry Profitability and Marginal Improvement - The lithium battery industry is expected to see a continued marginal improvement in profitability, with net profit for 2024 projected to decline at a slower rate. In Q1 2025, net profit increased by 27.44% year-on-year and 63.06% quarter-on-quarter [61][64] - Inventory levels have bottomed out and are recovering, with total inventory reaching 216.29 billion yuan by the end of Q1 2025, a 10.07% increase from the end of 2024 [69] - Capital expenditures have continued to decrease, reflecting a slowdown in capacity expansion due to temporary overcapacity in the industry [73] Group 4: Solid-State Battery Industrialization - Solid-state batteries are gaining traction due to their high energy density and safety advantages. They are expected to become the next generation of lithium batteries, with several major automakers planning to introduce solid-state battery vehicles by 2027 [80][82] - The industrialization process of solid-state batteries is accelerating, with semi-solid batteries already in mass production and full solid-state batteries expected to start small-scale production around 2027 [80][82] - The demand for solid-state batteries is being driven by the growth of new energy vehicles and low-altitude economy applications, creating structural demand in the materials and equipment sectors [80][82] Group 5: Investment Strategy - It is recommended to focus on leading companies in the battery and materials sectors that are experiencing fundamental improvements, particularly those with technological and capacity advantages in solid-state battery core materials and equipment [6][28] - Key investment targets include companies such as CATL, EVE Energy, and others that are well-positioned to benefit from the solid-state battery transition [6][28]