DE102012208120A1 - Charging device for charging energy store of electric car, has measurement unit that detects output energy and overcurrent produced by charging device, and control unit processes measurement values acquired from measurement unit - Google Patents

Charging device for charging energy store of electric car, has measurement unit that detects output energy and overcurrent produced by charging device, and control unit processes measurement values acquired from measurement unit

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Publication number
DE102012208120A1
DE102012208120A1 DE201210208120 DE102012208120A DE102012208120A1 DE 102012208120 A1 DE102012208120 A1 DE 102012208120A1 DE 201210208120 DE201210208120 DE 201210208120 DE 102012208120 A DE102012208120 A DE 102012208120A DE 102012208120 A1 DE102012208120 A1 DE 102012208120A1
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Germany
Prior art keywords
current
charging
charging device
device
characterized
Prior art date
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Withdrawn
Application number
DE201210208120
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German (de)
Inventor
Klaus-Peter Linzmaier
Gunther Kufner
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE201210208120 priority Critical patent/DE102012208120A1/en
Publication of DE102012208120A1 publication Critical patent/DE102012208120A1/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/04Cutting off the power supply under fault conditions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14Conductive energy transfer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • B60L53/31Charging columns specially adapted for electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/52Drive Train control parameters related to converters
    • B60L2240/529Current
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/121Electric charging stations by conductive energy transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/128Energy exchange control or determination
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/14Plug-in electric vehicles

Abstract

The charging device (1) has a switch unit (2) for switching on/off of three-phase charge current. A measurement unit (3) detects the output energy, error and overcurrent produced by the charging device. A control unit (4) evaluates and processes the measurement values acquired from the measurement unit. An independent claim is included for method for operating charging device.

Description

  • The invention relates to a charging device for charging energy stores of electric vehicles and a method for operating such a charging device.
  • At charging devices for electric vehicles, which are also referred to as charging stations, various requirements are made in terms of switching options in various applications and errors. These include switching under rated load and switching off in the event of a short circuit, overload and fault currents. To meet these requirements, various commercial electromechanical protection elements such as circuit breaker circuit breakers, residual current circuit breakers (RCD = Residual Current Protective Device), fuses for accidental protection and contactors for switching the rated load are combined in conventional charging stations. In the case of charging stations with different or variable power output, in addition, because of the lack of adjustable switch-off criteria of these protective elements, a plurality of such combinations are frequently used.
  • The different switching and protective elements differ, among other things, with regard to the current strengths of the currents which can be switched with them and with regard to dead times and reaction times occurring when switching off. In addition, they often allow switching only for a limited number of switching operations. For example, a circuit breaker for line protection is able to switch off high short-circuit currents, but this rarely, while a contactor can switch the rated current almost as often.
  • A plurality of such different switching and protective elements also requires a plurality of associated actuators and measuring circuits. In addition, charging stations for the purpose of energy metering (so-called metering) and vehicle communication (pilot interface) are required for charging stations.
  • The invention has for its object to provide a charging device for charging energy storage of electric vehicles, which is improved in particular in terms of the cost of switching in nominal and fault operation over the prior art. Furthermore, the invention has for its object to provide a method for operating such a charging device.
  • The object is achieved with respect to the loading device by the features of claim 1 and in terms of the method by the features of claim 6.
  • Advantageous embodiments of the invention are the subject of the dependent claims.
  • A charging device according to the invention for charging energy storage of electric vehicles has a switching unit for switching on and off a single- or multi-phase charging current, a measuring unit for detecting an output from the charger energy and detecting fault and overcurrents and a control unit for evaluation and data processing of the Measurement unit recorded measured values.
  • The charging device according to the invention thus makes it possible to detect an energy output by the charging device and to detect fault and overcurrents by means of a single measuring unit whose measured values are also evaluated and processed by a control unit, for example for process visualization and for billing the energy delivered by the charging device. As a result, the number of components of the charging device compared to conventional charging stations with a variety of different switching and protective elements and associated circuits is significantly reduced. This advantageously reduces the material and assembly costs, the production costs, the space required, the weight and the probability of the error of the charging device compared to conventional charging stations.
  • A first preferred embodiment of the invention provides that the measuring unit in each case has a measuring element for each phase current of the charging current and the control unit is designed to determine a total current of these phase currents.
  • An alternative second embodiment of the invention provides that the measuring unit in each case has a measuring element for at least two phase currents of the charging current and a measuring element for a summation current of all phase currents of the charging current.
  • In this application, the phases of the charging current are understood to be the outer conductors and optionally a neutral conductor of the charging current. Accordingly, the phase currents are understood as meaning the outer conductor currents and optionally a neutral current of the charging current.
  • Both of the abovementioned embodiments make it possible to determine the phase currents and the summation current of the charging current by direct measurements of a plurality of these currents by means of the measuring elements and calculations of the currents which are not directly measured from the measured values for the directly measured currents. From the currents determined by the charging device determine emitted energy and fault and overcurrents.
  • A further embodiment of the invention provides a calibration device for generating a calibration current between phases of the charging current provided with measuring elements.
  • By means of such calibration currents, the phase currents and the total current can be determined very accurately. This is particularly advantageous when, as in both of the first mentioned embodiments of the inventions, the sum current or one of the phase currents is not measured directly, but is calculated from the directly measured currents, since inaccuracies of the direct current measurements cause corresponding inaccuracies of the calculated currents.
  • The calibration device preferably has a respective switch and a resistor for each provided with a measuring element phase of the charging current.
  • By the switch, the calibration currents can be generated advantageous as needed. The use of suitable resistors (precision resistors) enables very precise calibrations.
  • Accordingly, in the method according to the invention for operating a charging device according to the invention, each phase current and a sum current of all phase currents of the charging current are determined and the determined phase currents and the determined total current for detecting overcurrents and fault currents are evaluated by means of the control unit.
  • In this case, as already explained above, the individual phase currents are determined by either being measured directly or calculated from directly measured currents.
  • Preferably, a zero current of each phase and / or the sum of the phases are calibrated with the charging current off.
  • Preferably, a supply line to the charging device is provided with an overcurrent protection device which shuts off a supply current when its current exceeds a predetermined Zulassungsstromschwellenwert.
  • This can advantageously be achieved by means of the overcurrent protection device that the internal components of the charging device must be designed only for currents up to the Zuleitungsstromschwellenwert.
  • Alternatively, the charging device itself is provided with an overcurrent protection device which shuts off a supply current when its current exceeds a predetermined supply current threshold, and / or a supply line to the charging device and / or a connecting line between the charging device and an electric vehicle is provided with an inductance which causes a current increase delayed in the loader to a predetermined extent.
  • These embodiments are advantageous if the supply line to the charging device can not be provided with a sufficient overcurrent protection device, for example because a large number of charging devices are connected to the same supply line. By means of a suitable inductance in the supply line to the charging device and / or a connecting line between the charging device and an electric vehicle, an increase of the current within the charging device can advantageously be delayed such that the shutdown can be done by the internal switching elements, before the current strength through an internal switching elements the charging device can no longer safely be switched off value.
  • The charging current is preferably switched off when its current exceeds a predetermined charging current threshold.
  • As a result, charging currents can advantageously be prevented whose current would damage the charging device or an electric vehicle connected to it.
  • Preferably, measured values for determining the phase currents and the total current are detected analogously and evaluated directly for detecting overcurrents and fault currents.
  • By directly analyzing analog measured values to detect overcurrents and fault currents, fast reactions to critical measured values can be achieved and the relatively costly measuring circuits for measuring the currents themselves can be designed as simply as possible.
  • In contrast, the analog measured values for data processing are preferably first digitized.
  • The digitization allows a more accurate data processing of the measured values, for example for the metering, and an adaptation of the compared to the measuring circuits cheaper data processing circuits to the respective requirements.
  • The above-described characteristics, features and advantages of this invention as well as the art The manner in which they are achieved will become clearer and more clearly understood in connection with the following description of exemplary embodiments, which will be described in more detail in conjunction with the drawings. Showing:
  • 1 schematically a circuit diagram of a charging device for electric vehicles, and
  • 2 schematically a calibration device for generating a calibration current between the phases of the charging current.
  • Corresponding parts are provided in the figures with the same reference numerals.
  • 1 schematically shows a circuit diagram of a charging device 1 for electric vehicles. The loading device 1 includes a switching unit 2 with internal switching elements 2.1 for switching on and off a three-phase charging current, a measuring unit 3 for detecting one of the loading device 1 emitted energy and detection of fault and overcurrents and a control unit 4 for evaluation and data processing of the measuring unit 3 recorded measured values.
  • The charging current is provided by three outer conductors 5.1 . 5.2 . 5.3 and a neutral conductor 6 that led the phases 5.1 . 5.2 . 5.3 . 6 form the charging current.
  • In a first embodiment, the measuring unit comprises 3 only a first measuring block 3.1 each with one measuring element for each of the three outer conductors 5.1 . 5.2 . 5.3 and the neutral conductor 6 , The control unit 4 The total current of all phase currents (ie the outer conductor currents and the neutral conductor current) is calculated from the four measured individual currents.
  • A reliable calculation of the total current requires a sufficiently accurate measurement of the phase currents. Typically, the error of the total current must amount to a maximum of 5 mA, whereby the full scale value of the phase currents is typically 50 A. Accordingly, the individual streams are preferably measured with a relative accuracy of at least 250 ppm.
  • In a second embodiment, the measuring unit comprises 3 two measuring blocks 3.1 . 3.2 , A first measuring block 3.1 comprises at least two measuring elements for each one of the three outer conductors 5.1 . 5.2 . 5.3 , The second measuring block 3.2 comprises a measuring element for direct measurement of a total current of the three outer conductor currents and the neutral current. If by means of the first measuring block 3.1 Only two outer conductor currents are measured, the third outer conductor current from the control unit 4 neglecting the neutral conductor current calculated from the two measured outer conductor currents.
  • In both embodiments, the measured values acquired by the measuring elements become the control unit 4 supplied and evaluated by this. The determined individual currents (outer conductor currents and neutral conductor current) are used to detect overcurrents on at least one outer conductor 5.1 . 5.2 . 5.3 or the neutral conductor 6 used and the total current is used to assess the fault current.
  • An advantageous embodiment is also designed so that an overcurrent protection device 11 in a supply line to the charging device 1 is provided, which shuts off a supply current when its current exceeds a predetermined Zulassungsstromschwellenwert. The internal switching elements 2.1 the loader 1 are used to turn off a charging current whose current is between a predetermined charging current threshold and the Zuleitungsstromschwellenwert, wherein the charging current threshold, a maximum allowable current of the current in a connecting line between the charging device 1 and an electric vehicle.
  • According to the invention, a shutdown characteristic is prescribed in a further embodiment to simplify the dimensioning of the supply line protection for the dimensioning of the supply line protection, which is a bonding of the contacts of the internal switching elements 2.1 prevents regardless of the current to be cut off and regardless of the shutdown time, by switching through the internal switching elements 2.1 at current values above that through the internal switching elements 2.1 switchable currents is delayed until the current has subsided after triggering the supply line protection (switch-off delay).
  • For charging devices 1 in which the turn-off characteristic of the supply line protection does not lead to the safe switching off of an overflow region of the charging device 1 can be shared (eg in satellite systems, where a variety of charging devices 1 connected to a supply line), is an overcurrent protection device 11 in the loader 1 arranged yourself. Alternatively or additionally, the turn-off characteristic is advantageously dimensioned such that by an inductance of the supply line to the charging device 1 and the connection line between the charging device and the electric vehicle, an increase in the current in the charging device 1 is delayed such that the shutdown by the internal switching elements 2.1 can be done before the current through the internal switching elements 2.1 has not reached the safe switching value. In the alternative, this inductance can also be achieved by additional inductances 7 be supplemented.
  • In the example shown, the overcurrent protection device comprises 11 fuses 11.1 ,
  • A possible alternative also provides the possibility to switch off overcurrents in each overcurrent case by a feeder protection by a current in addition to the load current is drawn over the feed line, which triggers the supply line safe. However, this alternative has the disadvantage that a reset of the shutdown device after removal of the fault not within the charging device 1 can take place, but in this case the supply line protection must be designed remotely resettable. This increases the effort there.
  • 2 schematically shows a calibration device 8th for generating a calibration current between the phases 5.1 . 5.2 . 5.3 . 6 the charging current. The calibration device 8th includes for each phase 5.1 . 5.2 . 5.3 . 6 one switch each 9 and a resistor connected downstream of this 10 , where the outputs of the resistors 10 connected to each other.
  • The calibration device 8th In one embodiment of the first embodiment above, between the first measuring block 3.1 and the switching unit 2 arranged to improve the measurement accuracy. It allows a calibration current between the phases 5.1 . 5.2 . 5.3 . 6 memorize.
  • A corresponding calibration device 8th for the second embodiment above each has a switch 9 and resistance 10 only for each provided with a measuring element phases 5.1 . 5.2 . 5.3 . 6 on.
  • Advantageously, the calibration current can be determined by accurately measuring phase voltages within the first measurement block 3.1 and use of precision resistors. In addition, the calibration of the zero current can be made with open switching elements. Advantageously, the calibration of the zero current (offset) and the scaling (gain) takes place cyclically, for example at the beginning of each charging process or during brief charging interruptions during long charging processes. For this purpose, the current is advantageously first reduced to zero before the contacts of the switching unit 2 be opened. With open contacts, the zero current of the summation current measurement can also be calibrated (self-calibration).
  • While the invention has been further illustrated and described in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (13)

  1. Loading device ( 1 ) for charging energy stores of electric vehicles, the charging device ( 1 ) a switching unit ( 2 ) for switching on and off a single- or multi-phase charging current, a measuring unit ( 3 ) for detecting one of the loading device ( 1 ) emitted energy and detection of fault and overcurrents and a control unit ( 4 ) for evaluation and data processing by the measuring unit ( 3 ) has detected measured values.
  2. Loading device ( 1 ) according to claim 1, characterized in that the measuring unit ( 3 ) each have a measuring element for each phase current of the charging current and the control unit ( 4 ) is designed for determining a sum current of these phase currents.
  3. Loading device ( 1 ) according to claim 1, characterized in that the measuring unit ( 3 ) each having a measuring element for at least two phase currents of the charging current and a measuring element for a total current of all phase currents of the charging current.
  4. Loading device ( 1 ) according to claim 2 or 3, characterized by a calibration device ( 8th ) for generating a calibration current between phases provided with measuring elements ( 5.1 . 5.2 . 5.3 . 6 ) of the charging current.
  5. Loading device ( 1 ) according to claim 4, characterized in that the calibration device ( 8th ) each a switch and a resistor for each provided with a measuring element phase ( 5.1 . 5.2 . 5.3 . 6 ) of the charging current.
  6. Method for operating a charging device ( 1 ) according to one of the preceding claims, wherein - each phase current of the charging current and a sum current of all phase currents of the charging current are determined, and - by means of the control unit ( 4 ) the determined phase currents and the determined sum current for detecting overcurrents and fault currents are evaluated.
  7. A method according to claim 6, characterized in that when the charging current is switched off, a zero current of each phase ( 5.1 . 5.2 . 5.3 . 6 ), and / or the sum of the phases ( 5.1 . 5.2 . 5.3 . 6 ) is calibrated.
  8. A method according to claim 6 or 7, characterized in that a supply line to the charging device ( 1 ) with an overcurrent protection device ( 11 ) is provided, which shuts off a supply current when its current exceeds a predetermined Zulassungsstromschwellenwert.
  9. Method according to claim 6 or 7, characterized in that the loading device ( 1 ) with an overcurrent protection device ( 11 ) which shuts off a supply current when its current exceeds a predetermined supply current threshold.
  10. A method according to claim 6 or 7 or 9, characterized in that a supply line to the charging device ( 1 ) and / or a connecting line between the charging device ( 1 ) and an electric vehicle with an inductance ( 7 ), which causes a current increase in the charging device ( 1 ) delayed to a predetermined extent.
  11. Method according to one of claims 6 to 10, characterized in that the charging current is switched off when its current exceeds a predetermined charging current threshold.
  12. Method according to one of claims 6 to 11, characterized in that measured values for determining the phase currents and the total current are detected analog and evaluated directly for detecting overcurrents and fault currents.
  13. Method according to one of claims 6 to 12, characterized in that measured values for determining the phase currents and the total current are detected analog and digitized for data processing.
DE201210208120 2012-05-15 2012-05-15 Charging device for charging energy store of electric car, has measurement unit that detects output energy and overcurrent produced by charging device, and control unit processes measurement values acquired from measurement unit Withdrawn DE102012208120A1 (en)

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DE201210208120 DE102012208120A1 (en) 2012-05-15 2012-05-15 Charging device for charging energy store of electric car, has measurement unit that detects output energy and overcurrent produced by charging device, and control unit processes measurement values acquired from measurement unit

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Publication number Priority date Publication date Assignee Title
DE102016216401A1 (en) 2016-08-31 2018-03-01 Siemens Aktiengesellschaft A method for charging an electrically powered vehicle using a charging cable, charging cable and residual current protection circuit for detecting a direct current
CN107800163A (en) * 2016-08-31 2018-03-13 西门子公司 Method, charging cable and the residual current protection circuit to be charged by charging cable
US10427550B2 (en) 2016-08-31 2019-10-01 Siemens Aktiengesellschaft Method for charging an electrically operated vehicle with the aid of a charging cable, charging cable and residual current arrangement for detecting a direct current

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