Wireless charging device and mobile means including same

Patent metadata

Field	Value
Publication number	US-12424875-B2
Application number	US-202017762301-A
Country	US
Kind code	B2
Filing date	Oct 6, 2020
Priority date	Oct 7, 2019
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

The present invention relates to a wireless charging device and a mobile means including same. Specifically, according to an embodiment of the present invention, a wireless charging device comprises: a coil unit, a magnetic unit arranged on the coil unit; and a heat transfer unit arranged in contact with at least a portion of the magnetic unit, thereby efficiently transferring heat generated in the magnetic unit to the outside and further improving heat dissipation and charging efficiency. Therefore, the wireless charging device can be advantageously used in a mobile means such as an electric vehicle requiring a large amount of power transmission between a transmitter and a receiver.

First claim

The invention claimed is:

1. A wireless charging device, which comprises:
a coil unit;
a magnetic unit disposed on the coil unit; and
a heat transfer unit disposed in contact with at least a portion of the magnetic unit,
wherein at least a part of the heat transfer unit is inserted into the magnetic unit, and
wherein the heat transfer unit is not disposed in a central region of the magnetic unit, and the coil unit is not disposed under the central region of the magnetic unit.

2. The wireless charging device of claim 1 , wherein the heat transfer unit comprises a heat medium capable of evaporation and condensation; and a container unit for accommodating the heat medium, the container unit has a tube shape comprising a sealed inner space, and the inner space of the container unit has a length of 10 cm to 50 cm and an internal diameter of 0.1 mm to 5 mm.

3. The wireless charging device of claim 2 , wherein the heat transfer unit comprises an evaporator section in which the heat medium is evaporated by heat generated in the magnetic unit, and a condenser section in which the heat medium evaporated in the evaporator section is condensed.

4. The wireless charging device of claim 2 , wherein the heat transfer unit further comprises a migration unit disposed in the container unit, the migration unit has a porous structure and absorbs and migrates the heat medium in a liquid state when the heat medium is in a liquid state, and the container unit comprises metal or ceramic.

5. The wireless charging device of claim 2 , wherein the heat transfer unit has a thermal conductivity of 5 to 10,000 W/m·K and a specific resistance of 1×10 2 to 1×10 20 Ω·cm.

6. The wireless charging device of claim 1 , wherein the heat transfer unit comprises a mesh sheet having a network structure, a ribbon sheet, or a thermally conductive sheet comprising a plurality of holes.

7. The wireless charging device of claim 6 , wherein the mesh sheet or the thermally conductive sheet has an opening (hole) area of 15% to 30% of the total area of the magnetic unit, and the ribbon sheet comprises two or more thereof spaced apart by a predetermined interval and has a width of 5 mm to 10 mm.

8. The wireless charging device of claim 6 , wherein the heat transfer unit comprises a metallic material comprising at least one selected from the group consisting of aluminum, copper, silver, and gold.

9. The wireless charging device of claim 6 , wherein the heat transfer unit has a thermal conductivity of 230 W/m·K to 430 W/m·K and a heat capacity of 24 J/mole·K to 25.5 J/mole·K.

10. The wireless charging device of claim 1 , which further comprises a housing for accommodating the coil unit and the magnetic unit, wherein the heat transfer unit is thermally connected to the magnetic unit and extends from the magnetic unit to the outside of the housing.

11. The wireless charging device of claim 10 , wherein one end of the heat transfer unit is inserted into the magnetic unit, and another end of the heat transfer unit is exposed to the outside of the housing.

12. The wireless charging device of claim 10 , which further comprises a shield unit disposed on one side of the coil, and a cooling system disposed outside the housing and directly or indirectly connected to the heat transfer unit.

13. A transportation means, which comprises:
a wireless charging device, wherein the wireless charging device comprises a coil unit; a magnetic unit disposed on the coil unit; and a heat transfer unit disposed in contact with at least a portion of the magnetic unit,
wherein at least a part of the heat transfer unit is inserted into the magnetic unit, and
wherein the heat transfer unit is not disposed in a central region of the magnetic unit, and the coil unit is not disposed under the central region of the magnetic unit.

Assignees

• Skc Co Ltd

Inventors

• Kim Nah Young
• Lee Seunghwan
• Choi Jong Hak
• Kim Tae Kyoung

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H05K7/20318

  Condensers · CPC title

• H05K7/20309

  Evaporators · CPC title

• B60L53/302 Primary

  Cooling of charging equipment · CPC title

• B60L53/12 Primary

  Inductive energy transfer · CPC title