Charging device for an electric energy storage device in a motor vehicle

• US 9,656,558 B2
• Filed: 08/01/2013
• Issued: 05/23/2017
• Est. Priority Date: 02/02/2011
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Weber, Robert, Herzog, Torsten
• Primary Examiner(s): Rodas, Richard Isla
• Assistant Examiner(s): Hernandez, Manuel
• Application Number:
  US13/956,422
• Publication Number:
  US 20130314039A1
• Time in Patent Office: 1,391 Days
• Field of Search: 320109
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 7/02 for charging batteries from ac mains by converters
• 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

A charging device is provided for a motor vehicle. The motor vehicle is equipped with an electric energy storage device, a DC-DC converter as well as a first hard-wired interface to a first external AC network for charging the electric energy storage device and a second inductive interface to a second external AC network for charging the electric energy storage device of the vehicle. The output power of the DC-DC converter is used as the charging power of the electric energy storage device. The input of the DC-DC converter can be supplied with electric power over the first and second interfaces.

Claims

1. A charging device for an electric energy storage device of a motor vehicle, comprising:

a DC-DC converter coupled to the electric energy storage device, wherein output power of the DC-DC converter provides charging power for the electric energy storage device;

a first interface configured to be hard-wired to a first external AC network for charging the electric energy storage device;

a second interface configured for inductive coupling with a second external AC network for charging the electric energy storage device; and

a third interface configured to be hard-wired to an external direct voltage source for charging the electric energy storage device,

wherein an input of the DC-DC converter is configured to be supplied with electric power over the third interface simultaneously with at least one of the first interface and the second interface, and

wherein the DC-DC converter is configured to simultaneously receive a maximum power output from the third interface and a maximum power output from the at least one of the first interface and second interface, where the maximum power output from the third interface is different than the maximum power output from the at least one of the first interface and second interface.

2. The charging device according to claim 1, wherein the first, second and third interfaces each have a maximum power output;

and

wherein the DC-DC converter is configured such that;

a lower limit of the nominal range of the input power of the DC-DC converter corresponds at least to a power constituting a lower power from a set of the maximum power outputs of the first, second and third interfaces; and

an upper limit of the nominal range of the input power of the DC-DC converter corresponds at most to a sum of the maximum power outputs of the first, second and third interfaces.

3. The charging device according to claim 1, wherein:

the electric energy storage device is configured for a maximum charge voltage of 1,000 volts;

the first interface is configured for an effective alternating voltage of up to 500 volts;

the second interface is configured for an inductive voltage of up to 3,000 volts; and

the third interface is configured for a direct voltage of up to 1,000 volts.