Method for negotiating a charging power between an electric vehicle and a charging station

• US 10,195,954 B2
• Filed: 09/23/2015
• Issued: 02/05/2019
• Est. Priority Date: 04/02/2013
• Status: Active Grant

• Current Assignee: innogy SE (E.ON SE)
• Original Assignee: innogy SE (E.ON SE)
• Inventors: Becker, Gernot
• Primary Examiner(s): Pelton, Nathaniel
• Application Number:
  US14/862,268
• Publication Number:
  US 20160009191A1
• Time in Patent Office: 1,231 Days
• Field of Search: 320152
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/529 Current
• CPC Class Codes: B60L 2240/662 Temperature
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/18 Cables specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• 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 10/72 Electric energy management in electromobility
• 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
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

Method for operating a charging station for electric vehicles in which a charging power is negotiated between a charge control device of the electric vehicle and the charging station, the charge control device controls a charging current which is transmitted from the charging station to the electric vehicle in accordance with the charging power negotiated, wherein a continuous power rating and a maximum power of the charging station which is greater than the continuous power rating are determined. In order to optimize the charging power and to accelerate a charging operation, it is proposed that a charging power which is above the continuous power rating and which at most corresponds to the maximum power is first negotiated, that the temperature in the charging station be monitored, and that, when a limit temperature is exceeded, a new charging power which at most corresponds to the continuous power be negotiated.

Claims

1. A method for operating a charging station for electric vehicles, in which

a charging power is negotiated between a charge control device of the electric vehicle and the charging station and

the charge control device controls a charging current which is transmitted from the charging station to the electric vehicle in accordance with the charging power negotiated,

wherein a continuous power rating and a maximum power of the charging station which is greater than the continuous power rating are determined, wherein

a charging power which is above the continuous power rating and which at most corresponds to the maximum power is first negotiated,

in that a temperature in the charging station is monitored, and

in that a new charging power is negotiated in accordance with the temperature.

2. The method according to claim 1, wherein, upon exceeding a limit temperature is exceeded, a new charging power which at most corresponds to the continuous power rating is negotiated.

3. The method according to claim 1, wherein the maximum power is determined by a maximum current-carrying capacity of electrical components of the charging station.

4. The method according to claim 1, wherein the maximum power between 50% and 100% of the continuous power rating is above the continuous power rating, wherein the continuous power rating is preferably between 22 kW and 44 kW.

5. The method according to claim 1, wherein the renegotiated charging power is below the continuous power rating.

6. The method according to claim 1, wherein the charging power is controlled in accordance with the temperature in the charging station, wherein the control is carried out by a P controller in a proportional manner, a PI controller in a proportional manner and integrally or a PID controller in a proportional, integral and differential manner.

7. The method according to claim 1, wherein the charging power is negotiated at the beginning of a charging operation and/or several times again during a charging operation.

8. The method according to claim 1, wherein the charging power is negotiated by a pilot conductor or an energy conductor in the cable set which connects the charging station to the electric vehicle.

9. The method according to claim 1, wherein, after a specific period of time of the charging power which is above the continuous power rating, a new charging power which at most corresponds to the continuous power rating is negotiated.

10. The method according to claim 1, wherein, when the temperature falls below a limit temperature, a new charging power which is above the continuous power rating and which at most corresponds to the maximum power is negotiated.