Marine Environment Adaptability Testing Laboratory for Lithium-Ion Batteries

With the development of marine resources exploitation and electrified transportation, large-scale lithiumion battery (LIB) energy storage systems are increasingly used in marine electrification platforms. Unlike terrestrial environments, the complex marine environment significantly impacts the degradation pathways of LIBs, potentially accelerating their performance decline. However, the underlying impact mechanisms remain unclear. This paper introduces a marine environment adaptability testing (MEAT) laboratory for LIBs. The MEAT laboratory conducts performance tests on LIBs in simulated marine environments, including high/low temperature, swaying/vibration, and salt spray conditions. The results indicate that high/low temperature and swaying conditions accelerate the cycle aging of LIBs by 30% over 200 cycles, while specific vibration conditions may extend the battery service life by up to 15%. Additionally, salt spray conditions accelerate the self-discharge of LIBs, which is closely related to exposure time and initial state of charge (SoC). Using multi-characteristic characterization methods of the MEAT laboratory, the mechanisms by which complex marine environments affect LIB performance are explored. These findings contribute to improving the adaptability of LIB models to marine environments and provide guidance for the design of marine environment adaptability testing standards.