US 12,406,780 B1
Insulated wire and preparation method thereof, coil and electronic/electrical device
Huimin Ye, Jiangxi (CN); Yuejia Zhu, Jiangxi (CN); and Zuomao Zhu, Jiangxi (CN)
Assigned to WELL ASCENT ELECTRONIC (GANZHOU) CO., LTD., Jiangxi (CN)
Filed by WELL ASCENT ELECTRONIC (GANZHOU) CO., LTD., Jiangxi (CN)
Filed on Dec. 30, 2024, as Appl. No. 19/005,964.
Claims priority of application No. 202410858368.5 (CN), filed on Jun. 28, 2024.
Int. Cl. H01B 7/02 (2006.01); H01F 5/00 (2006.01)
CPC H01B 7/02 (2013.01) [H01F 5/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An insulated wire comprising:
a conductor; and
an insulating layer arranged at the periphery of the conductor,
wherein:
a cross section of the conductor takes a shape of a rectangle, a sunken part is formed in the insulating layer on at least one surface of the conductor, the sunken part extends in a whole length direction of the insulating layer, and a convex part is formed in a left and right sides of the sunken part;
a distance between a bottommost part of the sunken part and a surface of the conductor is L1, L1 is 50 μm-300 μm, the distance between the bottommost part of the sunken part and a highest point of a convex part is L2, and the the value of (L2+L1)/L1 is 3-7;
angles between two lateral sides of the sunken part and a bottom of the sunken part are both a, and 150°≥a≥90°;
an upper wire and a lower wire are adhered to each other, then a channel through which a cooling medium flows is formed in a middle;
the insulating layer comprises a combination of a thermoplastic resin layer with a bonding layer, and the thermoplastic resin layer is on an outermost side of the insulating layer;
wherein a material of the bonding layer structurally comprises a polymerization unit as shown in formula 1 below:

OG Complex Work Unit Chemistry
in the formula, R1 and R2 are both aryl; and R3 is C2-12 alkyl;
and a polymerization unit as shown in formula 2 below, the ratio of formula 1 being 5-15%, and x+y is 10-10000;

OG Complex Work Unit Chemistry