METHOD FOR MONITORING AND OPTIMISING THE OPERATION OF A CHARGING TERMINAL FOR AN ELECTRIC VEHICLE AND CHARGING TERMINAL FOR IMPLEMENTING SAID METHOD

• US 20140312853A1
• Filed: 12/14/2012
• Published: 10/23/2014
• Est. Priority Date: 12/19/2011
• Status: Active Grant

• Current Assignee: Schneider Electric Industries SAS (Schneider Electric SE)
• Original Assignee: Schneider Electric Industries SAS (Schneider Electric SE)
• Inventors: Dreina, Emmanuel
• Granted Patent: US 9,434,266 B2
• Time in Patent Office: Days
• US Class Current: 320/145
• CPC Class Codes: B60L 2200/12 Bikes
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• 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 53/65 involving identification of vehicles or their battery types
• 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
• 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

A method for monitoring and optimizing operation of a terminal, including: generating an output voltage equal to a first DC value; connecting a vehicle, the output voltage switching to a second value; authorizing charging of the vehicle by modulating the output voltage between two values, with a maximum authorized charge current being set; checking an ability of the vehicle to be recharged by monitoring a value of the output voltage; supplying an output voltage modulated between a third voltage value and a negative value; initializing a first timer; reading a diagnosis time between initialization and the switching of the voltage from the second to the third value; comparing the time with standard values to determine a type of charger; taking characteristics of the charger into account to optimize energy management.

Claims

1-10. -10. (canceled)

11. A method for monitoring and optimizing operation of a charging terminal of an electric vehicle, the terminal including connection means configured to be connected to a vehicle for electric charging and to dialogue by a signal transmitted via a wire, the method comprising:

generating an output voltage equal to a first DC voltage value;

connecting an electric vehicle to the charging terminal, the output voltage switching from the first DC voltage value to a second DC voltage value;

checking an ability of the terminal to perform charging;

authorizing charging of the electric vehicle by modulating the output voltage between a positive value equal to the second voltage value and a negative value equal to opposite of the first voltage value, the modulation is of PWM type having a duty ratio fixed according to a maximum authorized charge current;

checking an ability of the electric vehicle to be recharged by monitoring a positive value of the modulated output voltage, the positive value of the output voltage switching from the second voltage value to a third voltage value when the vehicle is able to be recharged;

supplying a charge voltage to the vehicle by modulating the output voltage between a positive value equal to the third voltage value and a negative value equal to the opposite of the first voltage value, the duty ratio of the modulation enabling the maximum charge current to be set to a first value;

initializing a first timer concomitantly with authorization of charging of the vehicle;

reading a first elapsed diagnosis time between;

initialization of the first timer, and

switching of the output voltage from the second voltage value to the third voltage value;

comparing a value of the first diagnosis time with standard values recorded in a database;

determining a type of charger of the electric vehicle according to a comparative state between the first diagnosis time and the standard values; and

taking characteristics of the charger of the identified electric vehicle into account to locally optimize energy management.

12. The method for monitoring and optimizing according to claim 11, wherein the first DC voltage value is higher than the second DC voltage value.

13. The method for monitoring and optimizing according to claim 11, wherein the second voltage value is higher than the third voltage value.

14. The method for monitoring and optimizing according to claim 11, further comprising:

initializing a second timer concomitantly with supply of the charging voltage to the vehicle;

detecting a time when a charge current consumed by the vehicle reaches a maximum value;

reading a second elapsed diagnosis time for the charge current to reach the maximum value;

comparing a value of the second diagnosis time with values recorded in a database taking account of a comparative state relative to the value of the first diagnosis time;

determining a type of charger of the electric vehicle according to the first and second diagnosis times;

taking characteristics of the charger of the identified electric vehicle into account to locally optimize energy management.

15. The method for monitoring and optimizing according to claim 14, further comprising:

concomitantly;

initializing a third timer;

setting a maximum charge current to a second charge value, the output voltage being modulated between a positive value equal to the third voltage value and a negative value equal to the opposite of the first voltage value;

checking that the vehicle regulates its current according to the second maximum charge value;

reading a third diagnosis time at a moment when the electric vehicle regulates its charge current to the second maximum charge value;

comparing a value of the third diagnosis time with values recorded in a database taking account;

of a comparative state of the value of the first diagnosis time;

of a comparative state of the value of the second diagnosis time;

determining a type of charger of the electric vehicle according to the first, second, and third times;

taking the characteristics of the charger of the identified electric vehicle into account to locally optimize energy management.

16. The method for monitoring and optimizing according to claim 11, wherein the taking into account includes adjusting a maximum charge current setpoint value according to the type of charger connected.

17. The method for monitoring and optimizing according to claim 16, wherein the taking into account includes adjusting a maximum charge current setpoint value according to a maximum current consumable by the identified connected charger.

18. The method for monitoring and optimizing according to claim 16, wherein the taking into account includes adjusting a maximum electric power delivered by the terminal according to a global operation of a charging station including plural charging terminals.

19. The method for monitoring and optimizing according to claim 18, further comprising:

measuring a difference of electric current between the maximum current consumable by the identified connected charger and the maximum charge current authorized by the terminal;

placing the measured electric current difference at disposal of another charging terminal of the charging station.

20. An electric charging terminal for implementation of the method for monitoring and optimizing according to claim 11, the terminal comprising:

connection means configured to be connected to a vehicle for electric charging and to dialogue by a signal transmitted over a pilot wire;

means for generating;

a DC or modulated output voltage;

a charge voltage to the vehicle by modulating the output voltage between a positive value and a negative value, a duty ratio of the modulation enabling the maximum charge current to be set to a first value;

processing means for;

checking ability of the terminal to perform charging;

checking ability of the electric vehicle to be recharged by monitoring a positive value of the modulated output voltage;

means for authorizing charging of the electric vehicle;

wherein the processing means comprises means for;

initializing a first timer concomitantly with authorization of charging of the vehicle;

creating a first elapsed diagnosis time between;

initialization of the first timer, and

switching the output voltage from a second voltage value to a third voltage value;

comparing a value of the first diagnosis time with standard values recorded in a database;

determining a type of charger of the electric vehicle according to a comparative state between the first diagnosis time and the standard values;

taking characteristics of the charger of the identified electric vehicle into account to locally optimize energy management.