Energy transformers for non-contact energy transmission and traction accumulator charging system

Patent metadata

Field	Value
Publication number	US-11145456-B2
Application number	US-202016992084-A
Country	US
Kind code	B2
Filing date	Aug 12, 2020
Priority date	Aug 13, 2019
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

An energy transmitter for a contactless energy transmission may include a coil device and a magnetic conducting body. The coil device may be configured to at least one of i) provide and ii) receive a magnetic field. The coil device may include a coil arranged on a coil-facing first large magnetic body surface of the magnetic conducting body. The coil may include a plurality of coil windings each of which may be circumferentially arranged about an imaginary coil winding centre and define a coil winding circumferential length. A plurality of imaginary circumference section areas may each extend along the coil winding circumferential length of a corresponding coil winding through the magnetic conducting body between the two large magnetic body surfaces. At least two circumference section areas of the plurality of circumference section areas may be substantially identical to one another in terms of area.

First claim

The invention claimed is:

1. An energy transmitter for a contactless energy transmission, comprising:
a coil device configured to at least one of i) provide a magnetic field for a contactless energy transmission and ii) receive a magnetic field from the contactless energy transmission;
a magnetic conducting body having two large magnetic body surfaces for conducting the magnetic field;
the coil device including a coil arranged on a coil-facing first large magnetic body surface of the two large magnetic body surfaces, the coil including a plurality of coil windings;
each coil winding of the plurality of coil windings circumferentially arranged about an imaginary coil winding centre of the coil in a coil-like manner and defining a coil winding circumferential length;
a plurality of imaginary circumference section areas defined between the two large magnetic body surfaces which each extend along the coil winding circumferential length of a corresponding coil winding of the plurality of coil windings and through the magnetic conducting body between the two large magnetic body surfaces; and
wherein the magnetic conducting body is configured such that at least two circumference section areas of the plurality of circumference section areas are substantially identical to one another in terms of area.

2. The energy transmitter according to claim 1 , wherein all of the plurality of circumference section areas of the plurality of coil windings are identical to one another.

3. The energy transmitter according to claim 1 , wherein at least one of the plurality of circumference section areas defines a reference area with respect to which a remainder of the plurality of circumference section areas deviate in terms of area at least one of:
by a maximum of one of 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% and 10%;
by at least one of a predetermined parameter and a predeterminable parameter; and
according to at least one of a predetermined deviation function and a predeterminable deviation function.

4. The energy transmitter according to claim 1 , wherein the two large magnetic body surfaces further includes a second large magnetic body surface facing away from the coil, and wherein at least one of:
the two large magnetic body surfaces are inclined relative to one another;
the second large magnetic body surface is flat and the first large magnetic body surface is configured at least one of oblique and domed with respect to the second large magnetic body surface; and
the second large magnetic body surface is configured flat and the first large magnetic body surface is configured one of conical shaped, truncated cone-shaped, pyramid-shaped, truncated pyramid-shaped and stepped pyramid-shaped.

5. The energy transmitter according to claim 1 , wherein the magnetic conducting body, one of at and in a region about the coil winding centre, includes at least one of a recess and a magnetic conducting body recess penetrating the magnetic conducting body.

6. The energy transmitter according to claim 1 , wherein one of:
the magnetic conducting body is structured in one piece; and
the magnetic conducting body is structured as a plurality of parts and includes at least two tile bodies which are assemblable in a puzzle-like manner.

7. The energy transmitter according to claim 6 , wherein the at least two tile bodies are formed powder-metallurgically as part of a sintering method.

8. The energy transmitter according to claim 6 , wherein the at least two tile bodies include at least one of i) a plurality of surface-ground contact edges and ii) a plurality of surface-ground contact surfaces such that, when in an assembled state, intermediate gaps between the at least two tile bodies are at least one of avoided and reduced.

9. The energy transmitter according to claim 6 , wherein each of the at least two tile bodies includes two large tile body surfaces, and wherein at least one of:
the two large tile body surfaces are flat and are orientated opposite to one another; and
the two large tile body surfaces includes a first large tile body surface facing away from the coil and a second large tile body surface facing the coil, the first large tile body surface configured level, and the second large tile body surface configured at least one of oblique and domed towards the first large tile body surface.

10. The energy transmitter according to claim 1 , wherein the plurality of coil windings are surface-followingly arranged spaced apart from one another with a gap of one of 0.1 mm, 0.2 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm and 5.0 mm on the first large magnetic body surface.

11. The energy transmitter according to claim 1 , wherein the plurality of coil windings are touchingly arranged on the first large magnetic body surface.

12. The energy transmitter according to claim 1 , wherein the plurality of coil windings define at least one of:
a flat winding plane and form a flat coil;
a conical coil tapered surface;

a truncated cone-shaped coil tapered surface;
a pyramid-shaped coil tapered surface;
a truncated pyramid-shaped coil tapered surface; and
a stepped pyramid-shaped coil tapered surface.

13. The energy transmitter according to claim 1 , further comprising a multi-part housing including a housing cover and a housing bowl, wherein:
the housing bowl is structured to receive the coil device and the magnetic conducting body; and
the housing cover is structured to cover the housing bowl.

14. A traction accumulator charging system, comprising:
an energy transmitter including:
a magnetic conducting body having two large magnetic body surfaces for conducting a magnetic field, the two large magnetic body surfaces including a coil-facing first large magnetic body surface;
a coil device configured to provide the magnetic field, the coil device including a coil arranged on the first large magnetic body surface, the coil including a plurality of coil windings each i) circumferentially arranged about an imaginary coil winding centre of the coil in a coil-like manner and ii) defining a coil winding circumferential length;
a plurality of imaginary circumference section areas each extending along the coil winding circumferential length of a corresponding coil winding of the plurality of coil windings and through the magnetic conducting body between the two large magnetic body surfaces;
the magnetic conducting body configured such that at least two circumference section areas of the plurality of circumference section areas are substantially identical to one another in terms of area; and
a multi-part housing for receiving the coil device and the magnetic conducting body;
a counter-energy transmitter including at least one receiver coil device interacting with the coil device in an energy transmitting manner; and
wherein the receiver coil device is configured in an identical manner to the coil device.

15. An energy transmitter for a contactless energy transmission, comprising:
a coil device configured to at least one of i) provide a magnetic field for a contactless energy transmission and ii) receive a magnetic field from the contactless energy transmission;
a magnetic conducting body having two large magnetic body surfaces for conducting the magnetic field;
the coil device including a coil, the coil including a plurality of coil windings arranged on a coil-facing first large magnetic body surface of the two large magnetic body surfaces;
each coil winding of the plurality of coil windings circulatingly arranged coil-like along a circumferential direction extending about an imaginary coil winding centre of the coil

Assignees

• Mahle Int Gmbh

Inventors

• Laemmle Christopher
• Laemmle Timo
• Schroth Holger

Classifications

• H02J50/10

  using inductive coupling · CPC title

• H01F27/366

  made of ferromagnetic material · CPC title

• B60L53/12 Primary

  Inductive energy transfer · CPC title

• H01F27/255

  made from particles (H01F27/26 takes precedence) · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title