CHARGING STATION

• US 20140217978A1
• Filed: 09/07/2011
• Published: 08/07/2014
• Est. Priority Date: 09/07/2011
• Status: Active Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Gellert, Remo
• Granted Patent: US 10,263,413 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• 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 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/50 Charging stations characterised by energy-storage or power-generation means
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: H02H 7/20 for electronic equipment for converters H02H7/10; for electric measuring instruments G01R1/36; for dc voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• 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 single-phase or multi-phase feed line is connected to a charging connection of the charging station, via which feed line the charge current flows to the charging connection of the charging station regardless of the load capacity identifier of the charge cable. An overload protection device is connected to and monitors the feed line. The overload protection device is an automatically switching overload protection device in which at least one identifier-specific trigger criterion is stored for each of at least two load capacity identifiers of the charging cable. The overload protection device is capable of automatically selecting the identifier-specific trigger criterion assigned to the load capacity identifier depending on the load capacity identifier of the charging cable, and of shutting off a switching device of the overload protection device arranged in the feed line depending on the selected trigger criterion.

Claims

1-11. -11. (canceled)

12. A charging station comprising:

an electric charging connection configured to connect a charging cable of an electric vehicle;

the charging station configured to read, at the electric charging connection, a load capacity identifier specifying an electrical load capacity of the charging cable;

a single-phase or polyphase feed line, connected to the electric charging connection, to carry a charging current, regardless of the load capacity identifier of the charging cable, to the electric charging connection of the charging station; and

an overload protection device with automatic switchover having a switching device configured to connect to the feed line and monitor the feed line to disconnect the charging current flowing through the feed line in response to an overload,

wherein an identifier-specific tripping criterion which is different from the electrical load capacity of the charging cable is assigned to the load capacity identifier of the charging cable and stored in the overload protection device, and

the overload protection device is configured to automatically select, on the basis of the load capacity identifier of the charging cable, the identifier-specific tripping criterion assigned to the load capacity identifier and disconnect the feed line on the basis of the selected tripping criterion.

13. The charging station as claimed in claim 12, wherein

the overload protection device comprises a memory in which a plurality of identifier-specific tripping criteria are stored, and

the overload protection device comprises a calculation device which is connected to the memory and is configured to read from the memory, on the basis of the load capacity identifier of the charging cable, the identifier-specific tripping criterion which is assigned to the load capacity identifier and stored in the memory.

14. The charging station as claimed in claim 12,

wherein the overload protection device is directly connected to the electric charging connection and can read the load capacity identifier of the charging cable by itself.

15. The charging station as claimed in claim 12,

wherein the identifier-specific tripping criterion assigned to the load capacity identifier is selected from the group consisting of a maximum current value, a tripping characteristic, and a calculation guideline.

16. The charging station as claimed in claim 13,

wherein the overload protection device comprises a measuring device which is connected to the calculation device and determines a measured value that specifies a loading of the feed line, and transfers the measured value to the calculation device.

17. The charging station as claimed in claim 16,

wherein the measuring device comprises a current measuring device that measures the charging current through the feed line.

18. The charging station as claimed in claim 12,

wherein the feed line comprises a polyphase feed line, and

the overload protection device with automatic switchover monitors a phase of the polyphase feed line.

19. The charging station as claimed in claim 18,

wherein the switching device has an individually actuable switch for the phase of the polyphase feed line, and

the overload protection device is configured to individually monitor the phase of the polyphase feed line and individually disconnect the phase of the polyphase feed line in response to the overload.

20. The charging station as claimed in claim 18,

wherein the overload protection device is configured to disconnect the phase of the polyphase feed line regardless of a symmetry of a charging current loading in a plurality of phases of the polyphase feed line.

21. The charging station as claimed in claim 12,

wherein the overload protection device comprises an interface module, and

a control device of the overload protection device is connected to the interface module and changes the identifier-specific tripping criteria by remote parameter setting via the interface module.

23. The charging station as claimed in claim 14,

wherein the identifier-specific tripping criterion assigned to the load capacity identifier is selected from the group consisting of a maximum current value, a tripping characteristic, and a calculation guideline.

24. The charging station as claimed in claim 23,

wherein the overload protection device comprises a measuring device which is connected to the calculation device and determines a measured value that specifies a loading of the feed line, and transfers the measured value to the calculation device.

25. The charging station as claimed in claim 24,

wherein the measuring device comprises a current measuring device that measures the charging current through the feed line.

26. The charging station as claimed in claim 25,

wherein the feed line comprises a polyphase feed line, and

the overload protection device with automatic switchover monitors a phase of the polyphase feed line.

27. The charging station as claimed in claim 26,

wherein the switching device has an individually actuable switch for the phase of the polyphase feed line, and

the overload protection device is configured to individually monitor the phase of the polyphase feed line and individually disconnect the phase of the polyphase feed line in response to the overload.

28. The charging station as claimed in claim 26,

wherein the overload protection device is configured to disconnect the phase of the polyphase feed line regardless of a symmetry of a charging current loading in a plurality of phases of the polyphase feed line.

29. The charging station as claimed in claim 28,

wherein the overload protection device comprises an interface module, and

a control device of the overload protection device is connected to the interface module and changes the identifier-specific tripping criteria by remote parameter setting via the interface module.

30. The charging station as claimed in claim 12,

wherein the identifier-specific tripping criterion is one of a plurality of identifier-specific tripping criteria assigned to the load capacity identifier of the charging cable.

22. A method for monitoring the charging process of a charging station comprising:

reading a load capacity identifier of a charging cable connected to an electric charging connection of the charging station;

monitoring a charging current in a feed line connected to the electric charging connection of the charging station;

assigning an identifier-specific tripping criterion which is different from an electrical load capacity of the charging cable to the load capacity identifier on the basis of the load capacity identifier of the charging cable;

determining an overload according to the selected tripping criterion; and

disconnecting the feed line in response to the overload.