锂/钠混合电池系统多自标参数优化与热管理协同设计研究

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关键词：锂/钠混合电池新能源汽车电池热管理冷启动中图分类号：TM911.3；TK02；TK123；U463.63 文献标志码：ADOI：10.20104/j.cnki.1674-6546.20250187

【Abstract】Leveraging the complementarycharacteristics of Lithium-Ion Batery （LIB）and Sodium-Ion Batery（SIB）in termsof energydensityand low-temperature performance，this studyproposesalithium/sodium hybrid baterysystemdesign methodology.Theresearch involves determining theseries-paralel configurationof individual LIB/SIBcells through energy ratiocalculationsanddsigningtreearrangementshemes：theinterlacedstripmethd，thewrapngmethod，ndested method.Atwo-dimensional thermal simulationmodel isconstructed tovalidate thecooperative mechanism wheresodium-ion batteries initiate heating for lithium-ion batteriesat -20 . The results demonstrate that a hybrid configuration of 70% LIBs and 30% SIBsachieves theoptimal balance among energy density，cost，and low-temperature performance.The nested arrangement enhances thermal management eficiency，improving temperature distribution uniformity by 40% under normal conditions and reducing cold-start time by 62% compared to the interlaced strip method at low temperatures.

Keywords：Lithium/sodium hybrid battery，New energy vehicles，Battery thermal management， Cold start

1前言

锂离子电池因其具有能量密度高的优势而广泛用作新能源汽车的动力电池，但其耐低温性能差，制约了新能源汽车在低温地区的应用[1-4。（剩余12238字）