Transmission coil for the inductive transfer of energy

• US 10,245,965 B2
• Filed: 07/15/2015
• Issued: 04/02/2019
• Est. Priority Date: 09/10/2014
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Stewing, Felix, Diekhans, Tobias
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US15/509,980
• Publication Number:
  US 20170259677A1
• Time in Patent Office: 1,357 Days
• Field of Search: 320108
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/302 Cooling of charging equipment
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/28 Coils; Windings; Conductive connections
• CPC Class Codes: H01F 27/2876 Cooling cooling transformers and inductances in general H01F27/08
• CPC Class Codes: H01F 27/288 Shielding
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/005 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 Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

The invention relates to a transmission coil (10) configured for inductive energy transfer, comprising a carrier (17), a coil arrangement (11) having a plurality of turns (12), and a capacitance. It is thereby provided that the capacitance is formed of a plurality of capacitors (22), wherein each capacitor (22) is assigned to an individual turn (12) or to a group of at least two turns (12) of the coil arrangement (11), and together with the coil arrangement, the capacitors (22) are arranged on the carrier (17). The invention further relates to a stationary charging station and to a vehicle, each comprising such a transmission coil (10), and to a system for the inductive charging of vehicles. No drawing text to be translated.

Claims

1. A transmission coil (10) which is configured to inductively transfer energy, comprising a carrier (17), a coil arrangement (11) with a multiplicity of turns (12), and a capacitance, characterized in that the capacitance is formed by a multiplicity of capacitors (22), wherein one of the capacitors (22) is assigned to an individual turn (12) and another of the capacitors is assigned to a group of at least two turns (12) of the coil arrangement (11), and the capacitors (22) are arranged, together with the coil arrangement, on the carrier (17).

2. The transmission coil (10) as claimed in claim 1, characterized in that, furthermore, power electronics (20), which comprise a power inverter and/or a rectifier, are arranged on the carrier (17).

3. The transmission coil (10) as claimed in claim 2, characterized in that the power electronics (20) are configured to deactivate or activate individual turns (12) or individual groups of turns (12).

4. The transmission coil (10) as claimed in claim 2, characterized in that the turns (12) of the coil arrangement (11) are arranged in the form of concentric circles, a spiral path or a rectangular path, and the power electronics are located in a central region (13) of the coil arrangement (11).

5. The transmission coil (10) as claimed in claim 1, characterized in that the carrier (17) is configured to serve as a shield for stray magnetic fields.

6. The transmission coil (10) as claimed in claim 1, characterized in that the carrier (17) is configured to serve as a heat sink for the capacitors (22), the coil arrangement (11), a ferrite core (14) and/or power electronics (20).

7. The transmission coil (10) as claimed in claim 1, characterized in that the carrier (17) comprises ducts (30) which are configured to have a cooling medium flowing therethrough.

8. A fixed charging station which is configured to inductively charge vehicles, comprising at least one transmission coil (10) embodied as a primary transmission coil, as claimed in claim 1.

9. A vehicle which is configured to charge inductively, comprising at least one transmission coil (10) which is embodied as a secondary transmission coil, as claimed in claim 1.

10. A system for inductively charging vehicles, comprising at least one primary transmission coil and at least one secondary transmission coil, wherein the transmission coils (10) are embodied as claimed in claim 1.

11. The transmission coil as claimed in claim 1, wherein the capacitors are located in a central region (13) of the coil arrangement (11) and are surrounded by the coil arrangement.

12. A transmission coil (10), comprising:

a carrier (17);

a ferrite core (14) disposed on one side of the carrier;

power electronics (20) disposed in a central region on another side of the carrier; and

a coil arrangement (11) arranged on the carrier,

wherein the carrier (17) is configured to serve as a heat sink for capacitors (22), the coil arrangement (11), the ferrite core (14) and the power electronics (20).

13. The transmission coil (10) as claimed in claim 12, characterized in that one of the capacitors (22) is assigned to an individual turn (12) and another of the capacitors is assigned to a group of at least two turns (12) of the coil arrangement (11).

14. The transmission coil (10) as claimed in claim 12, characterized in that the carrier (17) is configured to serve as a shield for stray magnetic fields.

15. The transmission coil (10) as claimed in claim 12, characterized in that the carrier (17) comprises ducts (30) which are configured to have a cooling medium flowing therethrough.

16. A transmission coil (10) configured to inductively transfer energy, comprising:

a carrier (17),

a coil arrangement (11) with a multiplicity of turns (12) arranged on the carrier (17), and

a capacitance formed by multiple capacitors (22) arranged on the carrier (17),

wherein at least one of the capacitors (22) is connected to at least two turns (12) of the coil arrangement (11).

17. The transmission coil as claimed in claim 16, wherein the capacitors are located in a central region (13) of the transmission coil (10) and are surrounded by the coil arrangement (11).