Thermally conductive material, wiring harness and electrical relay component

Patent metadata

Field	Value
Publication number	US-2023070409-A1
Application number	US-202117795364-A
Country	US
Kind code	A1
Filing date	Jan 25, 2021
Priority date	Feb 10, 2020
Publication date	Mar 9, 2023
Grant date	—

Abstract

A thermally conductive material contains a base resin and an insulating filler, the insulating filler contains a thermally conductive filler and a hollow filler composed of particles including a gas layer, a content of the insulating filler is 20.0% by volume or more and 90.0% by volume or less based on a total material amount, and a content of the hollow filler is 25.0% by volume or more and 70.0% by volume or less based on a total amount of the insulating filler. A wiring harness is provided with an insulated wire composed of an insulation coating and a conductor, an exterior material, the insulated wire being inserted in the exterior material, and a heat dissipation material to be arranged between the insulated wire and the exterior material, and the heat dissipation material is made of the thermally conductive material.

First claim

1 . A thermally conductive material, comprising a base resin and an insulating filler, wherein:
the insulating filler contains a thermally conductive filler and a hollow filler composed of particles including a gas layer, a content of the insulating filler is 20.0% by volume or more and 90.0% by volume or less based on a total material amount, and a content of the hollow filler is 25.0% by volume or more and 70.0% by volume or less based on a total amount of the insulating filler.

2 . The thermally conductive material of claim 1 , wherein the thermally conductive filler contains any one or more kinds of boron nitride, aluminum nitride and alumina.

3 . The thermally conductive material of claim 1 , wherein the shape of the thermally conductive filler is any one or more kinds of a scaly shape, a particulate shape, a needle-like shape, a fibrous shape and a flat shape.

4 . The thermally conductive material of claim 1 , wherein a median diameter d50 of the thermally conductive filler is 0.2 μm or more and 120 μm or less.

5 . The thermally conductive material of claim 1 , wherein the hollow filler is composed of glass particles including a gas layer.

6 . The thermally conductive material of claim 1 , wherein the hollow filler has a spherical shape.

7 . The thermally conductive material of claim 1 , wherein a median diameter d50 of the hollow filler is 15 μm or more and 90 μm or less.

8 . A wiring harness, comprising:
an insulated wire composed of an insulation coating and a conductor; an exterior material, the insulated wire being inserted in the exterior material; and a heat dissipation material to be arranged between the insulated wire and the exterior material, the heat dissipation material being made of the thermally conductive material of claim 1 .

9 . The wiring harness of claim 8 , used as a high voltage cable for connecting between a power control unit and a battery.

10 . The wiring harness of claim 9 , wherein the high voltage cable is for an electric vehicle.

11 . An electrical relay component, comprising:
a busbar to be connected to a high voltage cable; and a housing to be fixed to the busbar, the housing being made of the thermally conductive material of claim 1 .

Assignees

• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industries

Inventors

• Kawakami Takashi
• Nakashima Kazuo
• Maeda Yusaku

Classifications

• H01B7/42

  with arrangements for heat dissipation or conduction · CPC title

• H02G3/16

  structurally associated with support for line-connecting terminals within the box · CPC title

• H01B3/46 Primary

  silicones · CPC title

• H02G3/03

  Cooling · CPC title

• C09K5/14

  Solid materials, e.g. powdery or granular · CPC title