IP Library › Granted Patent US 12,400,788
Granted Patent B2
US 12,400,788 · App. 18/349,710 · Granted Aug 26, 2025

Device for inductive energy transmission in a human body and use of the device

Inventors: Tobias Diekhans (Stuttgart, DE); Samuel Vasconcelos Araujo (Esslingen, DE); Michael Jiptner (Besigheim, DE)
Assignee: Kardion GmbH
H01F38/14A61M60/873A61M60/876H01F27/24H02J50/12
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Quick Facts
Patent No.
US 12,400,788
App. No.
18/349,710
Granted
Aug 26, 2025
Kind
B2
Abstract

The invention relates to a device ( 10 ) for inductive energy transmission into a human body ( 1 ), having a transmitter coil ( 24 ) and/or a receiver coil ( 14 ) having a first magnetic core ( 26 ) and a resonance or choke coil ( 16, 34 ) having a second magnetic core ( 32 ), wherein the first magnetic core ( 26 ) forms a part of the second magnetic core ( 32 ).

Claims (31)

1. A device for inductively transmitting energy into or receiving energy within a human body, the device comprising:

a first coil including a first magnetic core, wherein the first magnetic core has an end face and at least one leg extending away from a side opposite the end face and is configured to receive a plurality of wire windings opposite the end face and around the at least one leg, and

a second coil including a second magnetic core, the second magnetic core comprising three legs abutting the end face of the first magnetic core, wherein the second coil includes at least one recess extending radially around a middle leg of the three legs, the at least one recess configured to receive a plurality of wire windings,

wherein the first magnetic core and the second magnetic core have E-shaped cross-sections facing in a same direction, and wherein a width of the first magnetic core disposed in direct contact with the second magnetic core corresponds to a width of the middle leg of the second magnetic core.

2. The device according to claim 1 , wherein the plurality of wire windings of the second coil wind concentrically around the middle leg of the second magnetic core.

3. The device according to claim 1 , wherein the first coil comprises a plurality of first wire windings disposed concentrically relative to one another, wherein the second coil comprises a plurality of second wire windings disposed concentrically relative to one another, and wherein the plurality of first wire windings are disposed radially outside the plurality of second wire windings.

4. The device according to claim 1 , wherein the second coil is disposed concentrically to a longitudinal axis of the first magnetic core.

5. The device according to claim 1 , wherein the first magnetic core is disc-shaped.

6. The device according to claim 5 , wherein the first magnetic core comprises a radially circumferential recess.

7. The device according to claim 1 , further comprising a housing surrounding the first coil and the second coil, a height of the housing being equal to a height of the first coil and a height of the second coil.

8. A method for inductively transmitting energy, the method comprising:

inductively transmitting energy using a transmitter device and a receiver device, wherein at least one of the transmitter device and the receiver device comprises:

a first coil including a first magnetic core, wherein the first magnetic core has an end face and at least one leg extending away from a side opposite the end face and is configured to receive a plurality of wire windings opposite the end face and around the at least one leg, and

a second coil including a second magnetic core, the second magnetic core comprising three legs abutting the end face of the first magnetic core, wherein the second coil includes at least one recess extending radially around a middle leg of the three legs, the at least one recess configured to receive a plurality of wire windings,

wherein the first magnetic core and the second magnetic core have E-shaped cross-sections facing in a same direction, and wherein a width of the first magnetic core disposed in direct contact with the second magnetic core corresponds to a width of the middle leg of the second magnetic core.

9. The method of claim 8 , wherein at least one of the transmitter device and the receiver device further comprises a housing, wherein the housing is in at least indirect contact with skin of a human body.

10. The method of claim 8 , wherein the transmitter device inductively transmits energy and the receiver device inductively receives energy.

11. The method of claim 10 , wherein the energy received at the receiver device is used for charging a battery in communication with the receiver device.

12. A system for inductive energy transmission, the system comprising:

a first device including a first coil and a second coil; and

a second device,

wherein the first coil includes a first magnetic core, wherein the first magnetic core has an end face and at least one leg extending away from a side opposite the end face and is configured to receive a plurality of wire windings opposite the end face and around the at least one leg and wherein the second coil includes a second magnetic core,

wherein the second magnetic core comprises three legs abutting the end face of the first magnetic core, wherein the second coil includes at least one recess extending radially around a middle leg of the three legs, the at least one recess configured to receive a plurality of wire windings,

wherein the first magnetic core and the second magnetic core have E-shaped cross-sections facing in a same direction and

wherein the first and second devices are disposed in alignment on opposite sides of skin of a body to transfer energy into the body, and wherein a width of the first magnetic core disposed in direct contact with the second magnetic core corresponds to a width of the middle leg of the second magnetic core.

13. The system of claim 12 , wherein the plurality of wire windings of the second coil wind concentrically around the middle leg of the second magnetic core.

14. The system of claim 12 , wherein the first coil comprises a plurality of first wire windings disposed concentrically relative to one another, wherein the second coil comprises a plurality of second wire windings disposed concentrically relative to one another, and wherein the plurality of first wire windings are disposed radially outside the plurality of second wire windings.

15. The system of claim 12 , wherein the second coil is disposed concentrically to a longitudinal axis of the first magnetic core.

16. The system according to claim 12 , further comprising a housing surrounding the first coil and the second coil, a height of the housing equal to a height of the first coil and a height of the second coil.

17. The system according to claim 12 , wherein the first magnetic core is disc shaped.

18. The system according to claim 17 , wherein the first magnetic core comprises a radially circumferential recess.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 15, 2024
From: DIEKHANS, TOBIAS; VASCONCELOS ARAUJO, SAMUEL; JIPTNER, MICHAEL
To: ROBERT BOSCH GMBH
Reel/Frame 068303/0197 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 15, 2024
From: ROBERT BOSCH GMBH
To: KARDION GMBH
Reel/Frame 068303/0257 →
Continuity (2)
Continuation 17090355 · Nov 5, 2020
Related Publication 20230352236A1 · Nov 2, 2023
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