Busbar and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10020646-B2
Application number	US-201715441349-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Sep 24, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A busbar includes: an elongated busbar body which is composed of an electrically conductive material; and an insulating coating which covers the circumference of the busbar body. The cross section of the busbar body orthogonal to the longitudinal direction is substantially rectangular. The insulating coating is composed of a light curing resin which has an elongation percentage of not less than 50% after being cured and a Young's modulus of not more than 900 MPa. And the insulating coating is formed by applying the light curing resin onto the surface of the busbar body and then curing the applied light curing resin. The light curing resin has a viscosity of 10 to 1000 Pa·s at 25° C.

First claim

What is claimed is:

1. A busbar, comprising:
an elongated busbar body which is composed of an electrically conductive material; and
an insulating coating which covers the circumference of the busbar body, wherein
the cross section of the busbar body orthogonal to the longitudinal direction is substantially rectangular,
the insulating coating is composed of a light curing resin which has an elongation percentage of not less than 50% after being cured and a Young's modulus of not more than 900 MPa, and
the insulating coating is formed by applying the light curing resin onto the surface of the busbar body and then curing the applied light curing resin, the light curing resin having a viscosity of 20 to 1000 Pa·s at 25° C.

2. The busbar according to claim 1 , wherein after the light curing resin is applied onto the surface of the busbar body with an extruder, the light curing resin is irradiated with light energy to be cured.

3. A method of manufacturing a busbar, comprising:
applying a light curing resin to the circumference of an elongated busbar body which is composed of an electrically conductive material, the light curing resin having a viscosity of 20 to 1000 Pa·s at 25° C.; and
irradiating the light curing resin with light energy to cure the light curing resin, wherein
the cross section of the busbar body orthogonal to the longitudinal direction is substantially rectangular.

4. The busbar according to claim 1 , wherein connecting sections are provided at both ends of the busbar body.

5. The busbar according to claim 1 , wherein corners of the rectangular cross section of the busbar body are chamfered.

6. The busbar according to claim 1 , wherein a long side length and a short side length of the cross section of the busbar body are selected based on one or more of: a size of a space given to connect electric parts in an automobile, an amount of current flowing therethrough, and a bending workability.

7. The busbar according to claim 6 , wherein the long side length of the busbar body comprises a length of from 3 to 30 mm and the short side length comprises a length of from 0.1 to 5 mm.

8. The busbar according to claim 6 , wherein a ratio of the long side length to the short side length in the cross section of the busbar body is 3 to 30.

9. The busbar according to claim 6 , wherein a ratio of the long side length to the short side length in the cross section of the busbar body is 5 to 20.

10. The busbar according to claim 1 , wherein the light curing resin comprise one of an ultraviolet curable resin and a visible-light curing resin.

11. The method according to claim 3 , wherein the light curing resin and the light energy comprise at least one of: an ultraviolet curable resin and ultraviolet light energy; and a visible-light curable resin and visible light energy.

12. The method according to claim 3 , wherein the light curing resin comprises ultraviolet curable resin containing at least a photopolymerizable oligomer or monomer and a photopolymerization initiator.

13. The method according to claim 12 , wherein the photopolymerizable oligomer is an oligomer including two or more functional groups having an unsaturated double bond.

14. The method according to claim 13 , wherein the photopolymerizable oligomer is selected from the group consisting of at least one of: an epoxy acrylate-based oligomer, an epoxidized oil acrylate-based photopolymerizable oligomer, a urethane acrylate-based oligomer, a polyester urethane acrylate-based oligomer, a polyether urethane acrylate-based oligomer, a polyester acrylate-based oligomer, a polyether acrylate-based oligomer, a vinyl acrylate-based oligomer, a silicone acrylate-based photopolymerizable oligomer, a polybutadiene acrylate-based oligomer, a polystyrene ethyl methacrylate-based oligomer, a polycarbonate dicarbonate-based oligomer, an unsaturated polyester-based oligomer, and a polyethylene/thiol-based oligomer.

15. The method according to claim 13 , wherein the functional group in the oligomer including two or more functional groups having the unsaturated double bond is selected from the group consisting of at least one of: an acryloyl group, a methacryloyl group, an aryl group, and a vinyl group.

16. The method according to claim 12 , wherein the photopolymerizable monomer in a molecule is selected from the group consisting of at least one of: an acryloyl group, a methacryloyl group, an aryl group, and a vinyl group.

17. The method according to claim 12 , wherein the photopolymerization initiator is selected from the group consisting of at least one of: a benzoin ether, a ketal, a acetophenone, a benzophenone, and a thioxanthone.

18. The method according to claim 3 , wherein the light curing resin comprises ultraviolet curable resin containing an additive comprising at least one of: a photopolymerization initiator aid, an anti-adhesive agent, a filler, a plasticizer, a non-reactive polymer, a colorant, a flame retardant, a flame retardant assistant, an anti-softening agent, a mold-release agent, a desiccant agent, a dispersant, a wetting agent, a suspending agent, a thickener, a charge-preventing agent, an antistatic agent, a flattening agent, an anti-blocking agent, an anti-skinning agent, a surfactant.

19. The method according to claim 3 , wherein the light curing resin comprises a visible-light curable resin.

20. The method according to claim 19 , wherein the visible-light curable resin is cured by irradiation with light having a wavelength of about 400 nm or more.

Assignees

• Yazaki Corp

Inventors

• Taki Akihiro
• Tsuchiya Yuji

Classifications

• H01B13/24

  by extrusion {(extrusion of cables with plastic material in general B29C48/15)} · CPC title

• H01B7/0275

  comprising one or more extruded layers of insulation · CPC title

• H02G5/02 Primary

  Open installations · CPC title

• H01B13/145 Primary

  Pretreatment or after-treatment · CPC title

• H01B13/003

  using irradiation · CPC title