This invention relates to the field of cable technology, and in particular to a self-heating
phase change energy storage winding charging cable and its preparation method. From the inside out, the cable comprises a conductor core, an
insulation layer, a spiral tensile thermally conductive skeleton, a
phase change energy storage thermally conductive layer, a PTC self-regulating heating layer, a
thermal insulation layer, and an outer sheath layer. The spiral tensile thermally conductive skeleton is integrally formed with radial thermally conductive fins. A high
thermal conductivity carbon
fiber mesh is embedded inside the
phase change energy storage thermally conductive layer. A
temperature sensing layer is provided between the PTC self-regulating heating layer and the phase change energy storage thermally conductive layer. The
thermal insulation layer has a double-layer
composite structure, and an anti-freeze and wear-resistant buffer layer is provided on the inner side of the outer sheath layer. All
layers are coaxially integrated and tightly bonded, forming a closed-loop
energy management system. This invention provides long-lasting power-off insulation, completely solving the problem of winding in extremely cold conditions; uniform heating without overheating, significantly improving safety performance; energy saving and consumption reduction, lowering usage and production costs; enhanced mechanical properties, suitable for extremely cold winding scenarios; and intelligent integrated control, requiring no manual intervention.