ENERGY TRANSFER SYSTEM AND METHOD FOR THE DIAGNOSIS OF AN ENERGY TRANSFER SYSTEM

• US 20160288655A1
• Filed: 10/27/2014
• Published: 10/06/2016
• Est. Priority Date: 11/21/2013
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: MAYERS, Markus, MALCHOW, Florian, BECKER, Markus, EPPLER, Steffen, SCHUMANN, Philipp
• Granted Patent: US 10,150,376 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

The present invention relates to an inductive energy transfer system and a method for the diagnosis of a foreign object detection of an inductive energy transfer system. For this purpose, a defined fault is introduced into the region to-be-monitored between primary coil and secondary coil of the inductive energy transfer system, and the response of the foreign object detection to said defined fault is then evaluated.

Claims

1. A power transmission apparatus for inductive power transmission from a primary coil to a secondary coil, the apparatus comprising:

a detector that is designed to detect an object in an interspace between the primary coil and the secondary coil and to output a detection signal;

an apparatus for introducing a disturbance that is designed to introduce a predetermined disturbance into the interspace between primary coil and secondary coil; and

a diagnosis apparatus that is designed to actuate the apparatus for introducing a disturbance, to receive the output detection signal from the detector and to determine a piece of diagnosis information using the received detection signal from the detector.

2. The power transmission apparatus as claimed in claim 1, wherein the apparatus for introducing a disturbance varies the magnitude the intensity of the introduced disturbance.

3. The power transmission apparatus as claimed in claim 1, wherein the apparatus for introducing a disturbance is designed to introduce a metallic object into the monitoring region.

4. The power transmission apparatus as claimed in claim 1, wherein the apparatus for introducing a disturbance is a heat source.

5. The power transmission apparatus as claimed in claim 1, additionally comprising a memory that is designed to store the piece of diagnosis information determined by the diagnosis apparatus.

6. The power transmission apparatus as claimed in claim 1, additionally comprising a display apparatus that is designed to display the piece of diagnosis information determined by the diagnosis apparatus.

7. A system for charging a motor vehicle, the system comprising:

a motor vehicle that has an electrical energy store; and

a power transmission apparatus as claimed in claim 1.

8. A method for diagnosing an inductive power transmission system with foreign object monitoring, having the steps of:

introduction of a predetermined disturbance into a monitoring region of the foreign object monitoring;

reception of a detection signal from the foreign object monitoring after the predetermined disturbance has been introduced into the monitoring region of the foreign object monitoring; and

determination of a piece of diagnosis information using the received detection signal.

9. The method as claimed in claim 8, wherein the predetermined disturbance has its magnitude or intensity varied in the monitoring region of the foreign object monitoring.

10. The method as claimed in claim 8, wherein the determined piece of diagnosis information determines a malfunction in the foreign object monitoring if the received detection signal exceeds or drops below a predetermined threshold value.