High-strength high-conductivity copper alloy energy storage cable and preparation method

By introducing a multifunctional composite modifier into copper alloy energy storage cables to form a core-shell structure modifier, the balance between high strength and high conductivity of copper alloy cables is solved, achieving a synergistic improvement in both high strength and high conductivity, and overcoming the shortcomings of traditional modification schemes.

CN121852762BActive Publication Date: 2026-07-10FUJIAN CHANTEN TECH CO LTD
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Patent Information

Application Number
CN202610335539.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-19
Publication Date
2026-07-10
Estimated Expiration
2046-03-19

AI Technical Summary

Technical Problem

Existing copper alloy energy storage cables struggle to balance high strength and high conductivity. Traditional modification methods lead to decreased conductivity and easy aggregation of nano-reinforcement, while interface defects cause stress relaxation and creep fracture.

Method used

A multifunctional composite modifier, comprising a multi-walled carbon nanotube core, a silver conductive transition shell, and a rare-earth anchoring phase, was used to prepare copper alloy single wires through high-energy ball milling and cored wire feeding, forming a core-shell structure and achieving uniform dispersion and metallurgical bonding of the modifier in the copper matrix.

Benefits of technology

Without sacrificing conductivity, the tensile strength and heat resistance stability are significantly improved, resolving the contradiction between high conductivity and high strength in traditional copper alloy cables, and enhancing the mechanical load-bearing capacity and high-temperature structural stability of the cables.

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Abstract

The application relates to the field of metal matrix composites and wire and cable manufacturing, in particular to a high-strength and high-conductivity copper alloy energy storage cable and a preparation method; the cable comprises, from inside to outside, a conductor core, an insulation layer, a flame-retardant armored layer and a weather-resistant sheath layer; the conductor core is uniformly dispersed with a multifunctional composite modifier in a copper matrix, the modifier has a core-shell structure and is composed of a multi-walled carbon nanotube center core, a 5-15nm silver conductive transition shell layer and a rare earth anchoring phase; the core is to construct a high-strength skeleton by using the carbon nanotube to provide physical strengthening support, and the silver transition shell layer is used to tightly fuse with the copper matrix in a microstate, so that micro-pores are eliminated to realize dense metallurgical coherent bonding; the alloy single wire is prepared by feeding the intermediate into the copper melt and assisting with ladder aging treatment, the electronic transmission channel is effectively bridged, the interface electron scattering is greatly reduced, and the technical bottleneck of the traditional metal material strong-conductivity mutual repulsion is successfully broken.
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