Abstract: In order to meet the needs of the intelligent development of railway communication power supply, the application of lithium iron phosphate batteries in railway communication power supply is analyzed. The paper optimizes the design of lithium iron phosphate batteries in terms of safety and battery management systems, analyzes the cost input and application scenarios of these batteries in railways, and tests the analysis results in Lingjie Machine Room of China Railway Chengdu Group Co., Ltd. The test results further demonstrate the advantages and feasibility of lithium iron phosphate batteries in railway communication power supply. As backup battery packs for 48 V railway communication power supply, lithium iron phosphate batteries not only improve operation and maintenance efficiency, but also effectively reduce operation and maintenance costs, thereby meeting the needs of railway development in the new era.

Key words: lithium iron phosphate batteries, battery management system, communication power supply, cycle life

摘要： 为满足铁路通信电源智能化发展需求，对磷酸铁锂电池在铁路通信电源中应用进行分析。在安全性与电池管理系统上对磷酸铁锂电池进行优化设计，对磷酸铁锂电池在铁路上的成本投入及应用场景进行分析，并将分析结果在成都铁路局灵杰机房进行试验，试验结果进一步论证磷酸铁锂电池在铁路通信电源中应用的优势和可行性。磷酸铁锂电池作为铁路48 V通信电源的后备电池组，不仅能够提高运维效率，还有效降低运维成本，符合新时代铁路发展需求。

关键词: 磷酸铁锂电池, 电池管理系统, 通信电源, 循环寿命