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亿纬锂能大圆柱电池进展:良率突破97%
高工锂电· 2025-04-01 10:49
Core Viewpoint - The article highlights the advancements of EVE Energy in promoting cylindrical batteries as the optimal solution for electric vehicles, emphasizing their collaboration with BMW and the technical advantages of their products [2][3]. Group 1: Technical Advantages - EVE Energy claims that their cylindrical batteries can achieve manufacturing efficiency ten times that of square batteries, with production time reduced by half, aligning with the automotive industry's efficiency requirements [2]. - The fixed physical dimensions of cylindrical batteries allow for "in-situ upgrades" by changing the internal chemical system, which can significantly shorten R&D cycles and reduce costs [2]. - The "zero expansion" feature of cylindrical batteries mitigates common swelling issues found in square batteries, enhancing the long-term reliability of battery packs [2]. - EVE Energy emphasizes the intrinsic safety advantages of their cylindrical batteries, which include a high-strength steel shell and optimized structural design to better withstand bottom collision risks [2]. Group 2: Collaboration with BMW - EVE Energy has confirmed the supply of two customized cylindrical battery models to BMW: the DTE model focusing on long-range and the DTP model emphasizing ultra-fast charging, both utilizing ternary cathode materials [3]. - The company has opted for non-standard sizes of 4695 (for sedans) and 46120 (for SUVs) instead of sticking to the early industry standard of 4680, reflecting a trend towards diversification in optimal cylindrical battery sizes [3]. Group 3: Market Strategy - EVE Energy is pursuing a dual strategy by targeting the mid-to-high-end market (priced above 150,000 yuan) with their cylindrical ternary batteries, which they consider the optimal solution compared to square ternary batteries [4]. - The company is also developing lithium iron phosphate (LFP) cylindrical batteries, anticipating their potential in cost-sensitive extended-range and A0-class vehicle markets, contingent on achieving cost reductions through scaled production [4]. Group 4: Manufacturing and Production - EVE Energy claims high efficiency, fewer processes, and shorter cycles in their cylindrical battery production lines, with a significant focus on improving yield rates [5]. - The yield rate of their cylindrical batteries has improved from over 80% at the start of production in early 2023 to approximately 97% currently, marking a critical milestone [5]. - EVE Energy's cylindrical production lines in Jingmen, Hubei (ternary) and Qujing, Yunnan (LFP) are already in mass production, and the company is constructing a new factory in Hungary to meet European market demands by the end of 2025 [5].