新能源汽车充电电缆用高强度抗蠕变铝合金导体

High-Strength Creep-Resistant Aluminum Alloy Conductor for New Energy Vehicle Charging Cables

新能源汽车很好地解决了汽车尾气排放问题,成为新能源行业重点发展方向,助力我国实现“双碳”目标。新能源汽车车载充电电缆采用以铝代铜方案可以在增大电流承载能力的基础上降低电缆重量,而高强度抗蠕变铝合金导体开发成为其研制关键。通过对多种铝合金杆材配方成分和性能指标对比评估,选择高质量铝合金杆材,通过正交试验设计验证,优化铝合金导体时效工艺。采用综合性能优异的Al6101铝合金杆,在连铸连轧后对Al6101铝合金杆进行165℃、10 h过饱和固溶体淬火处理,在拉挤成型后对铝合金导体进行240℃、9 h时效处理,所制得的铝合金导体满足了高强度、抗蠕变、高导电性能要求,解决了铝电缆运行中的易蠕变和疲劳问题,确保新能源汽车充电铝电缆的成功推出。

New energy vehicles have effectively solved the problem of automobile exhaust emissions and become a key development direction in the new energy industry,helping China achieve the goals of carbon peaking and carbon neutrality.The use of aluminum instead of copper in the charging cable for new energy vehicles can reduce the weight of the cable while increasing its current carrying capacity,and the development of high-strength creep-resistant aluminum alloy conductors has become a key aspect of its development.By comparing and evaluating the formulation composition and performance indicators of various aluminum alloy rods,high-quality aluminum alloy rod materials are selected,and the aging process of aluminum alloy conductors is optimized through orthogonal experimental design verification.The Al6101 aluminum alloy rod with excellent comprehensive performance is used.After continuous casting and rolling,the Al6101 aluminum alloy rod is subjected to a supersaturated solid solution quenching treatment at 165℃for 10 hours.After extrusion forming,the aluminum alloy conductor is aged at 240℃for 9 hours.The obtained aluminum alloy conductor meets the requirements of high-strength,creep-resistance,and high-conductivity,solving the problems of easy creep and fatigue during the operation of aluminum cables,and ensuring the successful launch of new energy vehicle charging aluminum cables.