Ultra-thick paint film enameled flat wire for pure electric vehicle

Abstract

The invention discloses an ultra-thick paint film enameled flat wire for a pure electric vehicle, which comprises a wire core and an ultra-thick paint film arranged on the outer side of the wire core, wherein the upper surface and the lower surface of the ultra-thick paint film are of a planar structure, and the surfaces of the two sides of the ultra-thick paint film are of a cambered surface structure. According to the invention, a double-oven cross coating mode is adopted, the upper surface and the lower surface opposite to the upper surface and the lower surface in the other oven are coated and baked in one oven, so that the times that each surface of the flat wire becomes the upper surface or the lower surface are equal, and the effect that the upper surface and the lower surface of the flat wire are uniform is achieved. Insulating layers formed by painting the flat wire are gapless and non-overlapped and can meet strict requirements of new energy electric vehicle driving motors on windings. The wire core is stretched and tightened during painting, so that paint can be painted on the wire core more uniformly, and in the rotating process of a painting roller, the paint can be painted on the painting roller automatically and intermittently, so that the paint can flow out quantitatively, the painting effect is prevented from being influenced by excessive paint, and meanwhile, the paint waste is avoided.

Description

technical field [0001] The invention relates to an enamelled flat wire, in particular to an enamelled flat wire with an ultra-thick paint film for pure electric vehicles. Background technique [0002] At present, new energy pure electric vehicle drive motor windings mainly use film-wrapped flat wire, that is, a wrapped insulated flat wire that is spirally wound on a rectangular conductor with polyimide film (such as DuPont's Kapton film). Wrapping can only be two forms of gap wrapping or overlapping wrapping, but both of these methods have relatively large defects. [0003] The overlapping part of the overlapping wrap will double the thickness of the insulation layer. This multiplication cannot increase the insulation function, is ineffective, and has a negative impact on reducing the volume of the motor. Generally, it can only be used for the outermost wrapping. Gap wrapping will become a hidden danger of insulation failure due to the gap in the middle. In the electric v...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultra-thick enamelled enamelled flat wire for pure electric vehicles. The present invention connects the wire cores end to end and winds them on the wire feeding rollers of the two wire feeding assemblies, and makes the two wire feeding assemblies The wire cores between the upper adjacent wire feeding rollers are in a cross state. The present invention adopts the method of double oven cross coating, coating and baking in one oven and the opposite upper and lower sides of the other oven, so that the The number of times each side of the flat wire becomes up or down is equal to achieve the effect that both sides of the flat wire are uniform. The insulating layer formed by the flat wire through painting has no gaps and no overlaps, which can meet the stringent requirements of the new energy electric vehicle drive motor on the winding. Requirements, to solve the technical problem that due to the thick insulating layer of the flat wire, the conventional coating method will be affected by gravity, the upper coating of the flat wire is thin, the lower coating is thick, and the accumulation of multiple layers will be very uneven;

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