WO2021051146A1

WO2021051146A1 - Charging connection device with energy meter for electric vehicles

Info

Publication number: WO2021051146A1
Application number: PCT/AT2020/060331
Authority: WO
Inventors: Gerhard WEIDINGER; Markus Hug; Heribert Eilmsteiner
Original assignee: Keba Ag
Priority date: 2019-09-16
Filing date: 2020-09-15
Publication date: 2021-03-25

Abstract

The invention relates to a charging connection device (1) for electric vehicles. The charging connection device (1) comprises an electronic control device with which a charging process of an electric vehicle can be monitored and/or influenced. Furthermore, a power switching device is provided which, in a first switching state, enables electrical energy to be provided at an interface (7, 9) of the charging connection device (1). In a second switching state of the power switching device, provision of electrical energy at the at least one interface (7, 9) can be prevented. An energy meter is used to measure the electrical energy output via the charging connection device (1) to an electric vehicle. The energy meter is also configured to prevent a flow of energy, wherein in the event that the flow of energy is to be prevented, the energy meter has prioritised influence in controlling the the power switching device and causes the second switching state of the power switching device to be established or retained.

Description

CHARGING CONNECTOR WITH ENERGY MEASURING DEVICE FOR

ELECTRIC VEHICLES

The invention relates to a charging connection device for electric vehicles in combination with an energy measuring device as specified in the claims.

It is generally known that in order to charge or regenerate the energy store of an electrically operated vehicle, such a vehicle is parked for a certain time and is electrically connected to an electrical energy source, usually the locally available power supply. Modern electric vehicles now have an acceptable range of several 100 km, which can be covered with a fully charged energy storage device, and also a correspondingly high drive power of the order of 100 kW or more, which enables comfortable and rapid movement.

Compared to vehicles that use internal combustion engines for the drive and are usually refueled with a liquid or gaseous energy source during only a very short downtime, the charging process of the electrochemical energy storage device, which is common for electric vehicles today, takes a relatively long time. In order to improve the operating time and availability of an electric vehicle, efforts are therefore made to keep the charging time as short as possible, for which, however, considerable electrical power is required during the charging process. This must be taken from the electrical network, typically converted via the charging electronics in the vehicle and finally transferred to the vehicle's energy storage device. The order of magnitude of the charging power today is in the range of up to 22kW or even more, and is therefore significantly higher than the electrical power that can be drawn from a conventional household socket, for example. Electrically operated motor vehicles therefore represent large consumers compared to other electrical consumers that are common in households. Even if a power connection with in principle a sufficiently high electrical connection power is available, it can be too time-consuming or too expensive due to the overall load in parts of the power grid situation-dependent restrictions in the actually available power. For the charging process of electric motor vehicles - unless they are small vehicles like an electric bike or something comparable - special charging connection devices are therefore required or at least useful, which, in contrast to a conventional socket, not only provide or provide a correspondingly high electrical connection power. can transmit, but also aufwei sen additional means of communication with which the charging electronics of a connected vehicle can determine the actually obtainable charging power or can react to the current network situation without overloading the network or the supply line and thus causing a shutdown. Furthermore, a number of safety devices are implemented in such charging connection devices, for example a locking device, which prevents unauthorized disconnection or disconnection under full load with the corresponding arcing. The corresponding charging connection devices typically also ensure that if fault currents occur, in the event of overload and in some cases in the event of impermissible feedback currents, the system is switched off or signaled accordingly.

Such charging connection devices are for example in the publications US 4,532,418 A, DE 42 13 414 C2, FR 2766 950 A1, JP 11-122714 A, US 6,362,594 B2, WO 2007/141543 A2, WO 2010/011545 A1, WO 2010/133959 A2 and AT 507 605 A1 described ben.

Due to the high power to be transmitted, the power connection, both on the network side and on the vehicle side, is usually designed as a three-phase or multi-phase high-voltage connection with correspondingly large cable cross-sections ^{of typically 4 to 6 mm 2} , but in some cases also up to 16 mm ^2. The charging connection devices are expediently installed in the immediate vicinity of the parking spaces of the respective electric vehicles, which are usually garages, underground garages, covered parking spaces and the like, which can be private, but in some cases also publicly accessible or at least accessible to a larger group of people.

The housing of such charging connection devices must protect the persons handling it from contact with live parts in the interior or from life-threatening electric shocks. In addition, the housing protects the internal electrical and electronic components against mechanical damage as well as dirt and moisture and other substances to be expected in the vicinity of vehicles, such as road salt or similarly acting de-icing agents, thus ensuring that they function reliably over the long term.

The newer type of charging stations are already manufactured as relatively compact units, the function and safety of which is checked before delivery. All components relevant for the function and safety of the unit are arranged in this closed housing and thus protected from damage or manipulation. Usually, only the connection terminals for connection to the power grid and, if necessary, interfaces for connection to communication networks via separately removable housing parts are accessible to the specialist entrusted with the installation and commissioning. He is responsible for the proper installation or assembly and the connection to the power grid.

With the increasing spread of electric vehicles, there is also a desire or requirement for a publicly available or generally accessible charging infrastructure. In this context, it will also be increasingly necessary to bill the electrical energy provided by energy supply companies or network operators, inter alia, depending on the respective consumption. Charging connection devices corresponding to these requirements can also contain means for authorizing or releasing the energy supply, for example via a coded RFID transponder or via a key switch, or technical identification means in order to identify the user or to record information for billing purposes and If necessary, this data can be exchanged with central clearing points via data technology network connections. Furthermore, such charging connection devices can also contain means for measuring and monitoring the transmitted power, the current, or the amount of energy. Especially when the purchase of electrical energy is subject to billing, it is particularly important that this billing can always be carried out correctly and in accordance with the actual circumstances. This can only be achieved satisfactorily to a limited extent with the systems known to date. The object of the present invention was to overcome the disadvantages of the prior art and to provide a device by means of which the purchase of electrical energy at a generally accessible charging connection device can be offset with the highest level of correctness, the costs of creating one such a system should be kept as low as possible.

This object is achieved by a device according to the claims.

The charging connection device according to the invention for electric vehicles comprises:

- At least one first interface for drawing electrical energy from a stationary power supply network,

- At least one second interface for the controlled delivery of electrical energy to an electric vehicle,

- an electronic control device with which a charging process of an electric vehicle can be monitored and / or influenced,

- A power switching device with a first switching state in which provision of electrical energy at the at least one second interface can be enabled and with a second switching state in which provision of electrical energy at the at least one second interface can be prevented,

- An energy measuring device for measuring or detecting the electrical energy delivered to an electric vehicle via the charging connection device,

- A housing in which at least the electronic control device and the power switching device and optionally the energy measuring device are housed.

The energy measuring device is also set up to prevent an energy flow to the at least one second interface if there is a lack of readiness for measurement or detection. The energy measuring device has a prioritized or co-decisive control-related influence on the production or maintenance of the respective switching states of the power switching device. In particular, the energy measuring device is set up to bring about a transfer of the power switching device to the second switching state or to maintain the second switching state in the event that the energy flow to the at least one second interface is to be suppressed. The charging connection device according to the invention has the advantage that it allows the purchase of electrical energy to be billed as correctly as possible or to a high degree in accordance with the actual consumption values. In particular, this makes it possible to provide electrical energy only at the second interface, in particular at the outgoing interface of the charging connection device, when the energy measuring device is actually ready or able to measure or record an electrical energy flow in a timely or consumption-synchronized manner. Technically required times for processing or transferring measurement data have no negative effects on the accuracy of the amount of energy actually used. Ultimately, asynchronous or time-delayed provision and measurement processes for electrical energy can be avoided in a simple and reliable manner. In addition, the costs for creating a charging connection device according to the claims can be kept low as a result. Because of the design according to the claims, it is not necessary to provide high-performance components for the energy measuring device, for example "high-performance" microprocessors and / or data memories with particularly fast processing times, in order to allow measurement and data processing to be as delay-free or sufficiently rapid as possible to be able to achieve. The charging connection device according to the invention can thus also better meet the respective national regulations from laws and guidelines, such as the measurement and calibration requirements in Germany or the measurement and calibration guidelines in Austria. This brings advantages both for the operator of the charging connection device, for the energy supply company and also for the customer or consumer who receives the electrical energy.

In particular, it can be provided that the energy measuring device is designed to output or provide a control-related release and / or blocking signal. As a result, the energy measuring device can be integrated into the operational or sequence control of the charging connection device in a technically simple and nevertheless reliable manner, without the entire charging station requiring approval or certification according to national regulations with regard to energy measurement. In addition, status control of the switching states of the power switching device can thereby be implemented with little hardware complexity, implementation in charging connection devices of different types also being possible without any problems. Furthermore, it can be expedient if the energy measuring device is connected to the control device and the control device is designed to evaluate the control release and / or blocking signal, the control device being connected to the power switching device and the power switching device depending on the evaluation of the Release and / or blocking signal can be controlled by the control device. As a result, quasi-central control of the power switching device by the control device or by a power switch control unit can be guaranteed. Another advantage here is that a plurality of further criteria, which are decisive or co-decisive for the activation or deactivation of the power switching device, can easily flow into the sequence control or in the control of the power switching device.

An embodiment is also advantageous in which the energy measuring device is designed to emit a blocking signal if the energy measuring device is not ready to measure an energy flow to the at least one second interface. This ensures that the amount of energy actually consumed can always be determined as precisely as possible. This is independent of sporadic or inherent processing or reaction times of the energy measuring device or of the back-end system connected to it.

In particular, it is advantageous if the control device in the course of evaluating the release and / or blocking signal of the energy measuring device for the logical AND operation of the release and / or blocking signal of the energy measuring device with at least one quasi-internal release criterion or a switching request on the part of the Control device is formed. As a result, a clear evaluation of the system states and error-free control of the power switching device can be achieved.

In addition, it can be provided that the energy measurement device, in particular its measurement and evaluation software, is legally calibrated and / or certified in terms of measurement technology, thus confirming conformity with the respective national guidelines, standards and laws. This ensures that the energy measuring device meets mesotechnical and / or calibration requirements and the reference to electrical Energy both for the operator and for the customer or user of the charging connection device can run in a legally compliant manner.

According to an expedient embodiment, it is provided that the control device is at least partially controlled or influenced in its processes and functions by operating software and this operating software is not certified in terms of calibration and / or measurement technology, so that there is no conformity with the respective national laws and guidelines with regard to energy measurement. The operating software for the operation or the basic scope of functions of the charging connection device can thereby be updated relatively easily or updated more frequently. Changes in the operating software of the charging connection device do not necessarily have to be subjected to a complex re-certification. Software components relevant to calibration law in the energy measuring device in connection with an exact or legally compliant measurement and recording of the energy consumption remain unaffected by these measures from an update of the operating software. The costs and possible complications in connection with necessary or desired software updates on the charging connection device can thus be kept as low as possible.

Furthermore, an identification device or authorization device can be designed for identifying or authorizing different users of the charging connection device, the energy measuring device comprising a storage device or having access to a storage device in which data on charging processes or energy consumption of the respective user can be stored. As a result, the charging connection device can be used for multiple users by different users and an individually allocated billing of energy costs can be guaranteed.

According to an advantageous development, it is provided that the data on the charging processes from the energy measuring device can be or are stored unsigned for data purposes. As a result, the possible delay-free or particularly rapid acquisition and storage of the respective amounts of energy or energy supplies can be achieved. Inaccurate recordings or time-shifted assignments due to inertia or relative Long processing times in the measurement or acquisition system can thus be avoided. In addition, with standard or relatively inexpensive hardware components, a highly precise measurement or detection of the respective energy consumption per charging process or the total energy consumption can be achieved.

According to a further, expedient measure, it is provided that the energy data storage device is arranged in a subsection of the energy measuring device that is relevant in terms of calibration law. As a result, with respect to the energy measuring device, externally ordered components or component collections that are to be certified separately can be dispensed with, as a result of which a lower complexity of the charging connection device can be achieved. In addition, lower costs in terms of production and certification of the charging connection device can be achieved as a result.

Furthermore, it can be expedient if the energy measuring device and the Steuervorrich device each have their own microcontroller, each with its own firmware. As a result, two separate or structurally independent functional components are available, which makes it easier to implement metrological requirements and / or calibration regulations.

In addition, it can be provided that the energy measuring device is communicatively connected to the control device via a bus system, for example by means of a CAN bus or another serial data bus, the firmware of the control device and the firmware of the energy measuring device even without a data connection between the control device and the Energy measuring device are operable. As a result, the energy measuring device and the control device can run independently. In particular, the energy measuring device is independent in the sense that it can directly control the necessary peripherals for your tasks and does not have to access a non-certified system. The control device is independent in the sense that the firmware can also run and communicate without an energy measuring device, but in this case cannot carry out a metrological or calibration-compliant charge. According to a further development, it is possible that the energy measuring device is connected to a display, which display is provided for displaying data relevant to measurement and calibration law, for example total energy consumption since the energy measuring device was put into operation and / or a reference amount per charging process. This means that a user can check or evaluate at any time what amount of energy was drawn in the course of the respective charging process. After the display is controlled directly by the energy measuring device, which energy measuring device is preferably certified according to measurement or calibration law, fraudulent manipulation of the display content or misleading the respective user is impossible or at least very difficult.

Furthermore, it can be useful if the control device is set up to read out a data technology identifier, for example a serial number of the energy measuring device, and to check it for validity before each start of a charging process, with the control device being able to prevent the start of a charging process if the data technology identifier is is recognized as invalid or unknown. Fraudulent manipulation of the charging connection device, for example an unauthorized replacement of the energy measuring device, can thus be reliably thwarted. Ultimately, this can effectively prevent energy supplies or energy purchases from the charging connection device that do not comply with calibration law.

For a better understanding of the invention, it is explained in more detail with reference to the following figures.

They each show in a greatly simplified, schematic representation:

1 shows an embodiment of the charging connection device in a perspective view of the front of the housing;

2 shows an exemplary block diagram to illustrate components and functionalities of the charging connection device. By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, whereby the disclosures contained in the entire description can be applied accordingly to the same parts with the same reference numerals or the same component names. The position details chosen in the description, such as above, below, side, etc., also relate to the figure immediately described and shown and these position details are to be transferred to the new position in the event of a change in position.

An exemplary embodiment of a charging connection device 1 for electric vehicles is illustrated in FIG. 1. This charging connection device 1 is intended for charging or regenerating an energy storage device, in particular one or more batteries, of an electric vehicle, the charging connection device 1 forming the link between a stationary power supply network and a charging device or the energy storage device of the electric vehicle. The charging device of the energy store can be designed as part of the charging connection device 1. In the currently customary embodiments, however, the charging device is preferably built into the electric vehicle itself. The charging connection device 1 then represents a type of intelligent charging station for electric vehicles.

The charging connection device 1 shown comprises a housing 2, which in turn is formed from a front housing part 3 and a rear housing part 4, the rear housing part 4 being fixedly mounted, for example on a house wall or a column, and the front housing part 3, if necessary, from the rear housing part 4 can be removed. In the present embodiment, the front housing part 3 is formed from several, white direct housing parts 5.

A first interface 6 for drawing electrical energy from the stationary power supply network is arranged on an upper side of the housing 2. The charging connection device 1 draws the electrical energy from the power supply network via this first interface 6, the first interface 6 being designed as a permanently wired line interface in the present exemplary embodiment. In order to achieve the typically required electrical power in To be able to transmit the charging connection device 1 or from there further to the electric vehicle, electrical cables with a line cross-section of at least 4 mm ^{2 are} provided.

To deliver the electrical energy to the electric vehicle, at least one second interface 7 is formed on a front side of the housing 2, for example. This at least one second interface 7 comprises a socket 8 into which a plug of a charging cable of an electric vehicle can be inserted and locked. In the illustrated charging connection device 1, a further, second interface 9 is provided on an underside of the housing 2, to which a flexible charging cable permanently wired to the charging connection device 1 can be connected, a plug being formed at the free end of the flexible charging cable , which can be plugged into a corresponding socket on the electric vehicle. A corresponding charging cable outlet 10 for the flexible charging cable of the further, second interface 9 can be seen on the underside of the housing 2. Which of the embodiments of the second interface 7, 9 is actually present on the charging connection device 1 and whether only one or more second interfaces 7, 9 are formed can be determined as required. In an embodiment of the at least one, second interface 7, 9 as a flexible charging cable, a charging cable holder 11 is expediently provided on which the flexible charging cable can be stowed when not in use. Typically, the second interface 7, designed as a plug socket 8, and the second interface 9, designed as a cable outlet, are provided as alternatives on the charging connection device 1.

The housing 2 of the charging connection device 1 encloses a plurality of electrical or electronic components which are arranged or fixed on at least one circuit board 12 and / or can be held and wired in some other way in the housing. The electrotechnical or electronic components control and / or monitor, among other things, the charging process of the electric vehicle and can also be provided to ensure the electrotechnical safety of the charging connection device. In the course of controlling or monitoring the charging process, it is also necessary to carry out various measurements, for example to determine the current strength of the current transmitted to the electric vehicle. The electrotechnical or electronic components required for this can also be present on the at least one printed circuit board 12. In Fig. 2 is a schematic block diagram in connection with exemplified electrical or electronic components of the charging connection device 1 shows GE. These include in particular connecting terminals 13 for connecting a cable feed device to the first interface 6 of the charging connection device 1, a power switching device 14, for example a contactor or a power semiconductor switch for establishing or disconnecting an electrical connection between the first interface 6 and the second interface 7 or the further second interface 9 of the charging connection device 1, possibly a fault current monitoring device 15, which interrupts the circuit in the event of a fault current or earth fault in the power supply network from the charging connection device 1 to the electric vehicle, and a central control device 16, which preferably has a first Includes microcontroller 17, which controls individual electrotechnical or electronic components or communicates with them.

The charging connection device 1 further comprises a purely electrotechnically implemented energy measuring device 18 for measuring the electrical energy output via the charging connection device 1 to an electric vehicle. Such a purely electrotechnical energy measuring device 18 is, in contrast to an electromechanical energy meter, compact and lightweight.

The energy measuring device 18 comprises at least one voltage transmitter 19 for each electrical phase or each electrical path to the power switching device 14 and at least one current converter 20 for each electrical phase or each electrical path to the power switching device 14. The at least one voltage transmitter 19 and the at least one current converter 20 are with connected to a measurement controller 21 and thus transfer the respective voltage or current values to the measurement controller 21. The measurement controller 21 calculates the amount of electrical energy transferred or drawn from the signals or values transferred.

A non-volatile calibration data storage device 22, in particular an EEPROM memory, is arranged, like the control device 16, on a main board 23. In the calibration data storage device 22 are the for a precise measurement by the energy measuring device 18 required calibration data stored. These calibration data are device-dependent and vary primarily as a function of the electrical properties of the voltage generator 19 and the current transformer 20 or as a function of the ohmic resistances of the line s connections.

The energy measuring device 18 further comprises a non-volatile energy data storage device 24. In this energy data storage device 24, at least the values of the total energy consumption, which continuously increase from charging session to charging session, can be stored at the charging connection device 1.

This energy data storage device 24 is connected to an independent measurement data management controller 25. This measurement data management controller 25 is also connected to a display 26 on the charging connection device 1. In particular, this Dis play 26 is arranged directly on the housing 2 and can be read by a user of the Ladeanschlussvor device 1. This display 26 is provided for displaying data relevant to measurement and calibration law in the form of plain text. In particular, the total energy consumption since the energy measuring device 18 was first put into operation can be read on it. Alternatively or in combination with this, the respective reference amount of electrical energy per charging process can be visualized on the display 26 and read off by a user.

At least the energy data storage device 24 and the measurement data management controller 25 are preferably arranged on a structurally independent measurement board 27. This measuring board 27 can be electrically connected to the main board 23 via a connector interface 28. The main board 23 preferably serves as a carrier board for the measuring board 27.

The energy measuring device 18 is set up to prevent an energy flow or an energy release at the second interface 7 or 9, if the energy measuring device 18 is not able to precisely record or measure an energy consumption in terms of measurement technology or calibration law. This can occur due to the boot processes of the energy measurement device 18, in particular of the measurement data management controller 25. But other influences or disturbances can also lead to an exact recording, in particular, a time-synchronous provision and measurement of an energy consumption is not possible. In the event that the energy measuring device 18 is not adequately ready for measurement or acquisition, the energy measuring device 18 can prevent activation of the power switching device 14 and thus actively prevent a current flow to the output interface, in particular to the second interface 7 or 9. In the event that an energy flow to the at least one second interface 7 or 9 is to be prevented or refused, the energy measuring device 18 has a control-oriented influence on the switching states of the power switching device 14. In particular, the power switching device 14 has a first switching state (active state) , in which a provision or transmission of electrical energy to the at least one second interface 7 or 9 is made possible. In contrast, in a second switching state (inactive state), the provision or transmission of electrical energy to the at least one second interface 7 or 9 can be prevented. In the simplest case, the two switch positions are defined by the active or inactive state of an electromechanical power switch, in particular a contactor or a power semiconductor switch. For those cases in which the energy measuring device 18 is not ready for measurement or not ready for acquisition, the energy measuring device 18 produces or maintains the second switching state, i.e. the inactive state of the power switching device 14 or automatically prevented.

In this case, the energy measuring device 18 can be designed to output or provide a control-technical release or blocking signal 29. For this purpose, the energy measuring device 18 is connected to the control device 16 or to its circuit breaker control unit 31 by means of at least one control line 30, in particular at least one signal or data line. The control device 16 or its circuit breaker control unit 31 is designed for evaluating the control-related release and / or blocking signal 29 and for the evaluation-dependent control of the power switching device 14. The control device 16 or its circuit breaker control unit 31 is connected to the circuit breaker device 14 via at least one control line 31 ′. As a result, the power switching device 14 can be activated and deactivated on a case-by-case basis as a function of the evaluation results of the release and / or blocking signal 29 by the control device 16 or by the power switch control unit 31. It is useful if the energy measuring device 18 is set up to output or provide a blocking signal when the energy measuring device 18 is not ready to measure or record an energy flow to the at least one second interface 7 or 9. Conversely, the energy measuring device 18 is set up to output or provide a release signal when the energy measuring device 18 is ready for operation and can measure or detect an energy flow to the second interface 7 in accordance with measurement and calibration law.

The control-related or data-related evaluations by the control device 16 or by the circuit breaker control unit 31 can, for example, by a logical AND operation of the release or blocking signal 29 of the energy measuring device 18 with at least one release criterion or a switching request from the control device 16 be implemented. Such release criteria on the part of the control device 16 can be defined by a recognition of a properly connected vehicle that is ready for charging, by a release by the fault current monitoring device 15 and / or by a release by a thermal monitoring device.

The functional unit energy measurement device 18 of the charging connection device 1, in particular its measurement and evaluation software 32, 32 ', is certified in terms of measurement technology and calibration law. In particular, the energy measurement device 18 is designed to conform to national and / or international measurement and calibration regulations or it meets the requirements of country-specific measurement and calibration laws. In contrast, functional operating software 33, which is executed by control device 16 and determines the other processes and functions of control device 16 or charging connection device 1, is not certified according to country-specific calibration and / or measurement regulations. In particular, the operating software 33 of the charging connection device 1 is preferably not certified or assessed according to country-specific laws and / or guidelines in connection with measurement and / or calibration laws. As a result, extensive expenses for such assessments or certifications can be dispensed with. Since the operating software 33 only covers functional aspects of the charging connection device 1, for example communication with the electric vehicle or human-machine interaction with a user of the charging connection device, this is acceptable. In particular, this is achieved by separating aspects of the energy measuring device 18 that are relevant in terms of measurement and calibration law from purely functional aspects or operational process-specific aspects in connection with the operating software 33 of the control device 16 advantageously enabled.

The charging connection device 1 further comprises at least one identification device 34 for identifying different users of the charging connection device 1. The identification device 34 can be formed by an RFID reading device, by a pin keyboard, by a biometric detection device, or the like. The energy measuring device 18 comprises the above-mentioned energy data storage device 24 or the energy measuring device 18 has access to such an energy data storage device 24. The respective data on charging processes or energy consumption of the respective user can be stored in this energy data storage device 24. It is particularly expedient if these data relating to the charging processes of the individual users can be or are stored in the energy data storage device 24 in an unsigned data-technical manner. This allows fast processing s or storage times with relatively little memory requirements. The energy data storage device 24 is advantageously arranged in a sub-section of the energy measuring device 18 that is relevant in terms of calibration law. In particular, the energy data storage device 24 is arranged on the board on which the measurement data management controller 25 is also positioned. According to the example, this is implemented by the jointly used measuring board 27.

Furthermore, it is expedient if the energy measuring device 18 and the control device 16 each have their own or separately assigned microcontrollers each with their own firmware. According to the example, the energy measurement device 18 has the measurement controller 21, while the functional control device 16 of the charging connection device 1 comprises the independent microcontroller 17.

The energy measuring device 18 is preferably in communication with the control device 16 via a bus system 35, for example via a CAN bus or some other serial data bus. It is provided that the firmware of the control device 16 and the firmware of the energy measuring device 18 can also run without a data connection between the control device 16 and the energy measuring device 18. As a result, as possible a reaction-free, in principle self-sufficient operation of the respective units is made possible. A predominantly program-controlled or software-technical implementation in the charging connection device 1 provides that the control device 16 is set up to read a data identification 36 of the energy measuring device 18, for example a unique serial number, and to check it for validity before each start of a charging process. The start of a charging process can be prevented by the control device 16 or energy measuring device 18 if this data-technical identifier 36 is recognized as invalid or is unknown. Manipulations or unauthorized assignments between a manipulated energy measuring device 18 and / or a manipulated control device 16 can thereby be made more difficult or prevented.

Furthermore, data networking of a plurality of charging connection devices 1 with a central management system 37 can be provided. The data communication between the respective charging connection devices 1 and the central management system 37, in particular a so-called backend system, can be provided via the Internet 38, for example. For this purpose, the charging connection device 1 comprises an extended communication assembly 39 with at least one data communication interface 40 for learning communication with the central management system 37.

The exemplary embodiment shows possible design variants, it being noted at this point that the invention is not restricted to the specific design variants shown and does not have to include all of the design variants shown. In addition, various combinations of the individual design variants with one another are possible and this possibility of variation is within the ability of the laughing man active in this technical field due to the teaching of technical action through the subject invention.

The scope of protection is determined by the claims. However, the description and the drawings are to be used to interpret the claims. Linzeimerkätze or feature combinations from the shown and described different Ausführungsbeispie sources can represent independent inventive solutions for themselves. The task on which the independent inventive solutions are based can be found in the description. For the sake of order, it should finally be pointed out that, for a better understanding of the structure, some elements have been shown not to scale and / or enlarged and / or reduced.

List of reference signs charging connection device 29 Release and / or blocking signal housing 30 control line front housing part 31 circuit breaker control unit rear housing part 31 'control line further housing parts 32, 32' measurement and first interface evaluation software second interface 33 operating software socket 34 identification device second interface 35 bus system Charging cable outlet 36 data technology identifier charging cable holder 37 central management system circuit board 38 Internet connection terminals 39 communication assembly power switching device 40 communication interface fault current monitoring device control device first microcontroller energy measuring device voltage transmitter current converter measuring controller calibration data storage device main board energy data storage device measurement data management controller display measuring board plug interface

Claims

Patent claims

1. Charging connection device (1) for electric vehicles, comprising

- At least one first interface (6) for drawing electrical energy from a stationary power supply network,

- At least one second interface (7, 9) for the controlled delivery of electrical energy to an electric vehicle,

- An electronic control device (16) with which a charging process of an electric vehicle can be monitored and / or influenced,

- A power switching device (14) with a first switching state in which electrical energy can be provided at the at least one second interface (7, 9) and with a second switching state in which electrical energy is provided at the at least one second interface can be prevented,

- An energy measuring device (18) for measuring the electrical energy delivered to an electric vehicle via the charging connection device (1),

- A housing (2) in which at least the electronic control device (16) and the power switching device (14) and optionally the energy measuring device (18) are accommodated, characterized in that the energy measuring device (18) is further set up to provide an energy flow to the at least one second interface (7, 9) to be prevented, the energy measuring device (18) having a prioritized control-technical influence on the power switching device (14) in the event that the energy flow to the at least one second interface (7, 9) is to be prevented and causes the second switching state of the power switching device (14) to be established or maintained.

2. Charging connection device according to claim 1, characterized in that the energy measuring device (18) is designed to output or provide a control-related release and / or blocking signal (29).

3. Charging connection device according to claim 1 or 2, characterized in that the energy measuring device (18) is connected to the control device (16) and the Control device (16) is designed to evaluate the control-related release and / or blocking signal (29), the control device (16) being connected to the power switching device (14) and the power switching device (14) depending on the evaluation of the release and / or blocking signal (29) can be controlled by the control device (16).

4. Charging connection device according to one of the preceding claims, characterized in that the energy measuring device (18) is designed to output a blocking signal when the energy measuring device (18) is not ready to measure an energy flow to the at least one second interface (7, 9) given is.

5. Charging connection device according to claim 3 or 4, characterized in that the control device (16) in the course of evaluating the release and / or blocking signal (29) of the energy measuring device (18) for the logical AND operation of the release and / o the blocking signal (29) of the energy measuring device (18) is designed with at least one release criterion or a switching request from the control device (16).

6. Charging connection device according to one of the preceding claims, characterized in that the energy measurement device (18), in particular its measurement and evaluation software (32, 32 ‘), is certified and / or rated according to country-specific calibration laws and / or measurement guidelines.

7. Charging connection device according to one of the preceding claims, characterized in that the control device (16) is at least partially controlled and / or influenced in its processes and functions by operating software (33) and this operating software (33) is not in accordance with country-specific calibration laws and / or Measurement guidelines is certified and / or assessed.

8. Charging connection device according to one of the preceding claims, characterized in that an identification device (34) is designed to identify different users of the charging connection device (1), and that the Energiemessvor direction (18) comprises an energy data storage device (24) or on one Energy data storage device (24) has access in which data on charging processes or energy references of the respective user can be stored.

9. Charging connection device according to claim 8, characterized in that the data relating to the charging processes or energy consumption from the energy measuring device (18) can be stored unsigned as a tentechnical.

10. Charging connection device according to claim 8 or 9, characterized in that the energy data storage device (24) is arranged in a section of the energy measuring device (18) that is relevant for calibration law.

11. Charging connection device according to one of the preceding claims, characterized in that the energy measuring device (18) and the control device (16) each have their own microcontroller (21, 25; 17) each with its own firmware.

12. Charging connection device according to one of the preceding claims, characterized in that the energy measuring device (18) is communicatively connected to the control device (16) via a bus system (35), the firmware of the control device (16) and the firmware of the energy measuring device (18) can also run without a data connection between the control device (16) and the energy measuring device (18).

13. Charging connection device according to one of the preceding claims, characterized in that the energy measuring device (18) is connected to a display (26), which display (26) is used to display data relevant to measurement and calibration law, for example total energy consumption since the energy measuring device was put into operation (18) and / or a reference quantity per loading process is provided.

14. Charging connection device according to one of the preceding claims, characterized in that the control device (16) is set up to read out a data-technical identifier (36) of the energy measuring device (18) and to check it for validity before each start of a charging process (16) or the energy measuring device (18) the start of a charging process can be prevented if the datentechni cal identifier is recognized as invalid or unknown.