Device and method for the inductive transmission of electrical energy

• US 9,608,474 B2
• Filed: 08/27/2012
• Issued: 03/28/2017
• Est. Priority Date: 10/14/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mack, Juergen
• Primary Examiner(s): Memula, Suresh
• Application Number:
  US14/349,895
• Publication Number:
  US 20140354224A1
• Time in Patent Office: 1,674 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

A device for the inductive transmission of electrical energy, having at least one induction coil which is connected, or connectible, to a consumer and/or to a rechargeable battery, and having a communications device, which encompasses at least one control unit and is configured to modulate the load of the induction coil. It is provided that the communications device has a DC converter, whose output is connected or connectible to the consumer/the battery, and whose input is connected to the induction coil, the control unit controlling the DC converter for a load modulation.

Claims

1. A device for the inductive transmission of electrical energy, comprising:

at least one induction coil, which is connected or connectible to at least one of a consumer and a rechargeable battery;

a communications device, which includes at least one control unit and is configured to modulate the load of the induction coil;

wherein the communications device has a DC converter, whose output is connected or connectible to the at least one of the consumer and the battery, and whose input is connected to the induction coil, the control unit controlling the DC converter for modulating the load,

wherein the at least one induction coil serves as a secondary induction coil for receiving energy transmitted from a primary induction coil,

wherein the primary induction coil represents part of a primary side of an energy transmission system, and wherein the device constitutes a secondary side of the energy transmission system,

wherein during an energy transmission process, a communication takes place between the primary side and secondary side, and

wherein the communication is managed by the communications device, which includes a control device and the DC converter, wherein the control unit controls the DC converter by specifying a bit pattern, so that it modulates the load of the induction coil.

2. The device of claim 1, wherein at least one first switching element is assigned to the output of the DC converter.

3. The device of claim 1, wherein at least one first capacitor is between the first switching element and the DC converter.

4. The device of claim 1, wherein a second switching element is assigned to the battery, which prevents recharging of the battery in the open state.

5. The device of claim 1, wherein the control unit opens the second switching element while it controls the DC converter for a load modulation.

6. The device of claim 1, wherein a diode is between the first switching element and the battery, which prevents undesired discharging of at least one of the battery and a second capacitor which is disposed between the induction coil and the battery.

7. The device of claim 1, wherein the DC converter includes one of a flyback converter and an inverse converter.

8. The device of claim 1, wherein the DC converter includes a flyback converter which is assigned a third switching element which controls the flyback converter.

9. A method for operating a device for the inductive transmission of electrical energy, the method comprising:

providing at least one induction coil, which is connected or connectible to at least one of a consumer and a rechargeable battery; and

providing a communications device, which includes at least one control unit for a load modulation;

wherein the communications device has a DC converter, whose output is connected to the at least one of the consumer and the battery, and whose input is connected to the induction coil, the control unit controlling the DC converter for a load modulation,

wherein the at least one induction coil serves as a secondary induction coil for receiving energy transmitted from a primary induction coil,

wherein the primary induction coil represents part of a primary side of an energy transmission system, and wherein the device constitutes a secondary side of the energy transmission system,

wherein during an energy transmission process, a communication takes place between the primary side and secondary side, and

wherein the communication is managed by the communications device, which includes a control device and the DC converter, wherein the control unit controls the DC converter by specifying a bit pattern, so that it modulates the load of the induction coil.

10. The method of claim 9, wherein at least one first switching element is assigned to the output of the DC converter.

11. The method of claim 9, wherein at least one first capacitor is between the first switching element and the DC converter.

12. The method of claim 9, wherein a second switching element is assigned to the battery, which prevents recharging of the battery in the open state.

13. The method of claim 9, wherein the control unit opens the second switching element while it controls the DC converter for a load modulation.

14. The method of claim 9, wherein a diode is between the first switching element and the battery, which prevents undesired discharging of at least one of the battery and a second capacitor which is disposed between the induction coil and the battery.

15. The method of claim 9, wherein the DC converter includes one of a flyback converter and an inverse converter.

16. The method of claim 9, wherein the DC converter includes a flyback converter which is assigned a third switching element which controls the flyback converter.