Induction charging device for a vehicle charging system

Patent metadata

Field	Value
Publication number	US-11548400-B2
Application number	US-202017088538-A
Country	US
Kind code	B2
Filing date	Nov 3, 2020
Priority date	Nov 4, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

An induction charging device for a vehicle charging system may include a housing, a cooling device, a magnetic field conductor unit, at least one induction coil, and at least one heat conductance device. The magnetic field conductor unit may be configured to direct a magnetic field. The at least one induction coil may be configured to wirelessly transfer energy with a predetermined transmission power. The at least one heat conductance device may be arranged, with respect to an axial axis, between at least two components. The at least one heat conductance device may have an axial thermal conductivity with respect to the axial axis. The axial thermal conductivity of the at least one heat conductance device may vary at least partially with respect to at least one lateral axis that is aligned at least one of substantially perpendicularly and substantially transversely to the axial axis.

First claim

The invention claimed is:

1. An induction charging device for a vehicle charging system, comprising:
a housing defining a housing interior;
a cooling device, arranged in the housing interior, for cooling the induction charging device;
a magnetic field conductor unit arranged in the housing interior and configured to direct a magnetic field;
at least one induction coil arranged in the housing interior and configured to wirelessly transfer energy with a predetermined transmission power;
at least one heat conductance device arranged in the housing interior and configured to transport heat between at least two components arranged within the housing interior;
the at least one heat conductance device arranged, with respect to an axial axis, between the at least two components;
wherein the at least one heat conductance device has an axial thermal conductivity with respect to the axial axis; and
wherein the axial thermal conductivity of the at least one heat conductance device varies at least partially with respect to at least one lateral axis that is aligned at least one of substantially perpendicularly and substantially transversely to the axial axis.

2. The induction charging device according to claim 1 , further comprising at least one power electronics unit arranged in the housing interior.

3. The induction charging device according to claim 2 , wherein:
the at least one power electronics unit and the cooling device are arranged spaced apart from one another with respect to the axial axis;
the at least one heat conductance device includes a heat conductance device on an electronics side, the heat conductance device, with respect to the axial axis, arranged between the at least one power electronics unit and the cooling device; and
the heat conductance device is arranged at least partially on the power electronics unit and on the cooling device.

4. The induction charging device according to claim 1 , wherein:
the cooling device and the magnetic field conductor unit are arranged spaced apart from one another with respect to the axial axis;
the at least one heat conductance device includes a heat conductance device on a magnetic field conductor side, the heat conductance device, with respect to the axial axis, arranged between the cooling device and the magnetic field conductor unit; and
the heat conductance device is arranged at least partially on the cooling device and on the magnetic field conductor unit.

5. The induction charging device according to claim 1 , wherein:
the magnetic field conductor unit and the at least one induction coil are arranged spaced apart from one another with respect to the axial axis;
the at least one heat conductance device includes a heat conductance device on a coil side, the heat conductance device, with respect to the axial axis, arranged between the magnetic field conductor unit and the at least one induction coil; and
the heat conductance device is arranged at least partially on the magnetic field conductor unit and on the at least one induction coil.

6. The induction charging device according to claim 5 , wherein at least one:
the heat conductance device is formed at least one of continuously and at least partially according to a winding path of the at least one induction coil; and
the heat conductance device is structured such that each coil section of the at least one induction coil, which is disposed opposite the magnetic field conductor unit with respect to the axial axis, is connected in a thermally contacting manner with the magnetic field conductor unit via at least one section of the heat conductance device.

7. The induction charging device according to claim 1 , wherein the axial thermal conductivity of the at least one heat conductance device includes at least one of a linear variation, a non-linear variation, a stepped variation, and a discontinuous variations along the at least one lateral axis.

8. The induction charging device according to claim 1 , wherein:
the at least one heat conductance device includes a plurality of heat-conducting elements; and
at least two heat-conducting elements of the plurality of heat-conducting elements are arranged spaced apart from one another with respect to the at least one lateral axis.

9. The induction charging device according to claim 1 , wherein the at least one heat conductance device includes at least one of:
at least one heat-conducting element with an anisotropic thermal conductivity; and
at least one heat-conducting element with a lateral thermal conductivity with respect to the at least one lateral axis that is greater than the axial thermal conductivity of the at least one heat-conducting element.

10. The induction charging device according to claim 1 , wherein the at least one heat conductance device includes at least one of:
at least one heat-conducting element with a heat pump;
at least one heat-conducting element with a thermoelectric heat pump; and
at least one heat-conducting element with a heat pump encapsulating at least one of a refrigerant and a coolant, and configured to transport heat via a phase transition of the at least one of the refrigerant and the coolant.

11. The induction charging device according to claim 1 , wherein the at least one heat conductance device has a variation of the axial thermal conductivity configured such that the at least two components form a substantially homogeneous temperature distribution.

12. The induction charging device according to claim 1 , wherein the at least one heat conductance device includes at least one of:
at least one heat-conducting element disposed at regions which have, at least temporarily, a heat flux density of at least 5 W/cm 2 ;
at least one heat-conducting element with an anisotropic thermal conductivity disposed at regions which have, at least temporarily, a heat flux density of at least 5 W/cm 2 ; and
at least one heat-conducting element with a heat pump disposed at regions which, at least temporarily, have a heat flux density of at least 15 W/cm 2 .

13. The induction charging device according to claim 1 , wherein the at least one heat conductance device is self-adhesive.

14. The induction charging device according to claim 1 , wherein the at least one heat conductance device is composed of an electrically insulating heat-conducting material.

15. The induction charging device according to claim 1 , wherein at least one of:
the housing is composed of a casting compounds; and
the housing interior is at least partially filled with a casting compound.

16. A vehicle charging system, comprising:
an induction charging device according to claim 1 ;
wherein the induction charging device is structured as a portion of at least one of a stationary induction charging station and an on-board induction charging device of a vehicle; and
wherein the vehicle charging system is configured to facilitate wireless energy transfer from the stationary induction charging station to the on-board induction charging device of the vehicle.

17. A vehicle for a vehicle charging system, comprising:
an on-board induction charging device including an induction charging device;
a traction battery unit coupled electrically with the on-board induction charging device;
the induction charging device including:
a housing defining a housing interior;
a cooling device, arranged in the housing interior, for cooling the induction charging device;
a magnetic field conductor unit arranged in the housing interior and configured to direct a magnetic field;
at least one induction coil arranged in the housing

Assignees

• Mahle Int Gmbh

Inventors

• Laemmle Christopher
• Laemmle Timo
• Schroth Holger

Classifications

• Y02T90/14

  Plug-in electric vehicles · CPC title

• B60L53/12 Primary

  Inductive energy transfer · CPC title

• H02J50/005

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title

• B60L53/60

  Monitoring or controlling charging stations · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title