Ground assembly for an inductive charging device

Patent metadata

Field	Value
Publication number	US-12095276-B2
Application number	US-202117489755-A
Country	US
Kind code	B2
Filing date	Sep 29, 2021
Priority date	Sep 30, 2020
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A ground assembly for an inductive charging device for inductively charging a motor vehicle parked on a subsurface is disclosed. The ground assembly includes a baseplate that extends transversely to a gap direction, a coil that includes at least one coil winding spaced apart from the baseplate in the gap direction, a core assembly spaced apart in the gap direction from the baseplate and the coil, and a mounting support for holding the core assembly. The mounting support includes a support structure that is spaced apart from the baseplate in the gap direction and positions at least one core body of the core assembly.

First claim

The invention claimed is:

1. A ground assembly for an inductive charging device for inductively charging a motor vehicle parking on a subsurface, comprising:
a baseplate,
a coil that includes at least one coil winding and is spaced apart from the baseplate by a gap in a gap direction, the baseplate extending plate-shaped transversely to the gap direction,
a core assembly for a magnetic flux control, the core assembly spaced apart in the gap direction from the baseplate and from the coil and arranged between the baseplate and the at least one coil winding,
the core assembly including at least one core body that extends plate-shaped transversely to the gap direction,
a mounting support for holding the core assembly,
the mounting support including a mounting structure that is spaced apart from the baseplate in the gap direction and positions the at least one core body,
wherein a lower hollow space is disposed between the mounting structure and the baseplate,
wherein the mounting support includes at least one support body between the mounting structure and the baseplate, the at least one support body extending in the gap direction through the lower hollow space and supports the core assembly on the baseplate, and
wherein the at least one support body leaves a flow space vacant in the lower hollow space, through which a flow path leads.

2. The ground assembly according to claim 1 , wherein the mounting support for the at least one core body includes an associated support body, on which the at least one core body is locally supported.

3. The ground assembly according to claim 1 , wherein:
the mounting structure, on a lower side facing the baseplate, has an opening, and
the lower side, via the opening, is fluidically connected to the lower hollow space.

4. The ground assembly according to claim 1 , wherein the mounting structure, for the at least one core body, includes a frame that positions the at least one core body transversely to the gap direction.

5. The ground assembly according to claim 3 , wherein the at least one support body is associated with the at least one core body and enters the opening so that the at least one core body with the lower side is supported on the at least one support body.

6. The ground assembly according to claim 3 , wherein the mounting structure, for the opening, comprises an associated brace that extends through the opening transversely or obliquely to the gap direction.

7. The ground assembly according to claim 6 , wherein the brace projects from the at least one support body associated with the opening.

8. The ground assembly according to claim 4 , wherein:
the mounting structure further includes an outer case and an inner case spaced apart from the outer case, the outer case and the inner case in each case running around transversely to the gap direction, and
the frame is partly formed by at least one of the outer case and the inner case.

9. The ground assembly according to claim 1 , wherein the at least one support body is formed column-like.

10. The ground assembly according to claim 1 , wherein the baseplate is a cooling plate through which a flow path of a coolant leads.

11. The ground assembly according to claim 1 , further comprising a cover arranged on a side of the at least one coil winding facing away from the baseplate and spaced apart from the at least one coil winding in the gap direction,
wherein an upper hollow space is disposed between the mounting structure and the cover.

12. The ground assembly according to claim 11 , wherein at least one passage is separate from an opening disposed on a lower side of the mounting structure facing the baseplate, and wherein the at least one passage fluidically connects the lower hollow space with the upper hollow space.

13. The ground assembly according to, claim 1 , further comprising a conveying device that during operation conveys air at least through the lower hollow space.

14. The ground assembly according to claim 11 , further comprising a support element provided for the at least one support body, wherein the support element extends between the cover and the mounting structure and, in the gap direction, follows the at least one support body.

15. The ground assembly according to claim 1 , further comprising a heat-transfer structure disposed in the lower hollow space for enlarging a heat-transferring area, the heat-transfer structure arranged on the baseplate and spaced apart from the core assembly.

16. The ground assembly according to claim 15 further comprising a flow conductor provided for the heat-transfer structure, wherein the flow conductor during operation of a conveying device conducts air in a direction of the heat transfer structure.

17. The ground assembly according to claim 1 , wherein, on a lower side of the at least one core body facing the baseplate, a cooling rib projecting from the lower side into the lower hollow space is arranged.

18. A ground assembly for an inductive charging device for inductively charging a motor vehicle parking on a subsurface, comprising:
a baseplate;
a coil that includes at least one coil winding and is spaced apart from the baseplate by a gap in a gap direction, wherein the baseplate extends plate-shaped transversely to the gap direction;
a core assembly for a magnetic flux control, the core assembly spaced apart in the gap direction from the baseplate and from the coil and arranged between the baseplate and the at least one coil winding;
the core assembly including at least one core body that extends plate-shaped transversely to the gap direction;
a mounting support for holding the core assembly;
the mounting support including a mounting structure that is spaced apart from the baseplate in the gap direction and positions the at least one core body;
wherein a lower hollow space is disposed between the mounting structure and the baseplate;
wherein the mounting support includes at least one support body between the mounting structure and the baseplate, the at least one support body extending in the gap direction through the lower hollow space and supports the core assembly on the baseplate;
wherein the at least one support body leaves a flow space vacant in the lower hollow space, through which a flow path leads; and
wherein the at least one core body is centrally supported on the at least one support body.

19. The ground assembly according to claim 18 , wherein the mounting structure includes a frame that positions the at least one core body transversely to the gap direction.

20. The ground assembly according to claim 19 , wherein the mounting structure has an opening on a lower side of the at least one core body facing the baseplate, and wherein the lower side, via the opening, is fluidically connected to the lower hollow space.

Assignees

• Mahle Int Gmbh

Inventors

• Himmer Thomas
• Laemmle Christopher
• Schroth Holger
• Steinbach Martin

Classifications

• H01F38/14

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• B60L53/12 Primary

  Inductive energy transfer · CPC title

• H01F27/085

  Cooling by ambient air · CPC title

• B60L53/302

  Cooling of charging equipment · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title