US 12,278,023 B1 · Insulated wire and preparation method therefor, winding wire, and electrical device

Abstract

The present disclosure provides an insulated wire and a preparation method therefor, a winding wire and an electrical device, relating to the technical field of electrochemical elements. The insulated wire includes a conductive wire and an insulating layer coated on the conductive wire, where the insulating layer includes polyetheretherketone and thermoplastic polyimide, and a mass percentage of the polyetheretherketone in the insulating layer is not more than 20%; and the conductive wire is in direct contact with the insulating layer; and after extrusion and cooling for 24 h, under a condition that the insulated wire is ring cut and stretched by 15%, a length of the insulating layer losing adhesion is not greater than 1.9 mm.

Claims20

Dependent claims

An insulated wire, comprising a conductive wire and an insulating layer coated on the conductive wire, wherein the insulating layer comprises polyetheretherketone and thermoplastic polyimide, and a mass percentage of the polyetheretherketone in the insulating layer is not more than 20%;

the conductive wire is in direct contact with the insulating layer;
and after extrusion and cooling for 24 h, under a condition that the insulated wire is ring cut and stretched by 15%, a length of the insulating layer losing adhesion is not greater than 1.9 mm;
and
the number of bubbles with a diameter of greater than 30 μm in the insulating layer on a surface of the insulated wire of 100 m is not more than 1, wherein the diameter of the bubbles is a maximum width value of a vertical projection on the surface of the conductive wire nearest to the bubbles.

1 more element

A preparation method for an insulated wire, comprising a preheating process, a conductive-wire surface treatment process and an extrusion process, wherein

the preheating process comprises:
preheating a conductive wire to at least 320° C.;
the conductive-wire surface treatment process comprises:
in a protective gas environment, roughening a surface of the conductive wire to enable surface roughness Ra to be greater than 0.5 and less than 1.6;
and
the extrusion process comprises:
forming an insulating layer comprising polyetheretherketone and thermoplastic polyimide on the surface of the conductive wire through the extrusion process, wherein a mass percentage of the polyetheretherketone in the insulating layer is not more than 20%, and the number of bubbles with a diameter of greater than 30 μm in the insulating layer of 100 m is not more than 1, wherein the diameter of the bubbles is a maximum width value of a vertical projection on the surface of the conductive wire nearest to the bubbles;
wherein in the preheating process, the conductive-wire surface treatment process and the extrusion process, temperatures of the conductive wire are all maintained at 320° C. or above.

5 more elements

Dependencies are inferred from the claim text.

Insulated wire and preparation method therefor, winding wire, and electrical device

Life of this patent

Insulated wire and preparation method therefor, winding wire, and electrical device

Life of this patent

Abstract

Claims20