Drive-Over Protection for Cables for an Inductive Charging Coil for Electric Vehicles

• US 20180072174A1
• Filed: 11/16/2017
• Published: 03/15/2018
• Est. Priority Date: 05/26/2015
• Status: Abandoned Application

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: KRAMMER, Josef, LACHMUND, Mathias
• Application Number:
  US15/814,518
• Publication Number:
  US 20180072174A1
• Time in Patent Office: Days
• CPC Class Codes: B60L 3/00 Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption methods or circuit arrangements for monitoring or controlling batteries or fuel cells B60L58/00
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/18 Cables specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/34 Plug-like or socket-like devices specially adapted for contactless inductive charging of electric vehicles positioning means for charging devices using inductive energy transfer B60L53/38
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• 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

A primary coil unit for an inductive charging system is provided. The primary coil unit includes a primary coil, a control unit, a housing and an electric supply cable. The primary coil includes a cable duct for the supply cable. The cable duct can be connected to the housing in order to establish a duct-housing connection. The control unit is configured to electrically monitor the duct-housing connection.

Claims

1. A primary coil unit for an inductive charging system, comprising:

a primary coil;

a control unit;

a housing; and

an electrical supply cable, wherein

the primary coil includes a cable duct for the supply cable,

the cable duct is connectable to the housing to produce a duct-housing connection, and

the control unit is configured to electrically monitor the duct-housing connection.

2. An inductive charging system, comprising:

a primary coil unit including;

a primary coil;

a control unit;

a housing; and

an electrical supply cable, wherein

the primary coil includes a cable duct for the supply cable,

the cable duct is connectable to the housing to produce a duct-housing connection, and

the control unit is configured to electrically monitor the duct-housing connection; and

a secondary coil, which is integratable into a vehicle.

3. A vehicle comprising:

the inductive charging system including the secondary coil, according to claim 2, wherein

the vehicle or the inductive charging system includes a determining device, by way of which a spatial position of the primary coil unit relative to the secondary coil is determined.

4. The vehicle according to claim 3, wherein

for inductive transmission of energy from the primary coil to the secondary coil, the vehicle is positionable in a specified charging position relative to the primary coil unit,

in the charging position, a longitudinal direction of the vehicle is arranged substantially parallel to an orientation of the cable duct, and

a length of the cable duct is at least greater than a distance from the secondary coil to a vehicle axle which is nearest to the secondary coil, measured in the longitudinal direction of the vehicle.

5. The vehicle according to claim 4, wherein

in order for the vehicle to reach the charging position, the determining device determines the spatial position of the primary coil unit relative to the secondary coil, and

the vehicle further comprises a display device, wherein

the display device produces an indication when the primary coil occupies the spatial position relative to the secondary coil, starting from which the charging position can only be reached by way of a driving maneuver with more than one move.