Lithium battery diaphragm with high safety performance and lithium iron phosphate battery for communication base station

The invention relates to the technical field of lithium batteries, and discloses a lithium battery diaphragm with high safety performance, which comprises two polyolefin film layers and a copper metal layer arranged between the two polyolefin film layers, the thickness of the copper metal layer is smaller than that of the single polyolefin film layer, the copper metal layer is deposited on one polyolefin film layer through a physical deposition method, and the copper metal layer is deposited on the other polyolefin film layer. Through rapid heat dissipation and good conductivity of the copper metal layer, heat and slight short-circuit current generated in the battery can be dispersed and released in time, thermal runaway in the battery is avoided, the safety performance and the cycle performance of the lithium battery are improved, and the prepared lithium iron phosphate battery can better meet the use requirements of a communication base station. 本发明涉及锂电池技术领域，公开了一种高安全性能的锂电池隔膜，包括两聚烯烃膜层和设置在两聚烯烃膜层之间的铜金属层，铜金属层的厚