Method and device for controlling the authorization of charging processes of electrically powered vehicles

Abstract

Method for controlling the authorization of charging operations of electrically powered vehicles, comprising the steps of: providing a control unit (100) between a main connection (110) and a plurality of charging sockets (50) connected to the control unit (100) via a power line (40); connecting a vehicle (60) to be charged to one of the charging sockets (50); recording a total charging current supplied from the main connection (110) via the control unit (100) to the charging sockets (50); transmitting charging current requests from each vehicle connected to the charging sockets (50) to the control unit (100); comparing the total charging current with the sum of the charging currents of the vehicles connected to the charging sockets (50);and switching off the charging sockets (50) when the total charging current exceeds the sum, wherein connecting a vehicle to be charged includes a step of transmitting authorization information from the vehicle (60) to the control unit (100) and comparing the authorization information from the control unit with a list of authorized vehicles to verify the vehicle's authorization, and wherein the transmission of charging current requests and authorization information is provided by modulating an AC signal onto the power line (40) which represents the authorization request or the charging current request.

Description

technical field

[0001] The invention relates to a method and an apparatus for the controlled charging of electrically operated vehicles and in particular to a mechanism for blocking unauthorized charging.

[0002] Electrically powered vehicles, i. H. Hybrid vehicles and electric vehicles are powered by electrical accumulators that store tractive energy for the vehicle. In order to supply the vehicle with new traction energy, there is the possibility of exchanging an empty accumulator in the vehicle for a new one, but this is linked to a complex exchange process and further problems arise in the vehicle-related maintenance of the accumulators.

[0003] It is also known that electrically operated vehicles can be charged at sockets in a conventional network without further checking, but the socket must be secured to protect against unauthorized energy consumption, for example by providing the socket in a lockable room. However, this type of access control is not practicable for mobile applications and is therefore associated with difficulties when setting up a charging energy supply network.

[0004] The possibility of providing individual sockets with individual switching modules for autonomous access control, which themselves carry out authorization queries, requires a great deal of effort since each socket has to be modified individually.

[0005] It is therefore an object of the invention to provide a method and a device with which controlled charging of electrically operated vehicles can be implemented without this leading to high installation and hardware costs. Disclosure of Invention

[0006] This object is achieved by the method according to claim 1 and the control unit according to claim 6.

[0007] The concept on which the invention is based is to provide a central control unit that controls a large number of charging sockets. This means that a large number of charging sockets can be controlled by a single control unit without having to modify all charging sockets. This enables existing socket networks to be easily converted, for example in an underground car park, which are connected via a common line to a main connection which is provided, for example, by a fuse box. Between this main line, i. H. the control unit according to the invention is provided between the fuse box and the subsequent socket network, which thus controls the current flow between the main connection and all subsequent charging sockets. In order to be able to individualize the vehicles or the consumers at the individual sockets, data is transmitted via the existing socket network. Such a transmission is known, for example, from carrier frequency systems, which are also called power line systems, and in which existing lines provided for the power supply are also used for data transmission. The data transmission is provided by modulating an AC signal onto the voltage in the power cable, the modulated AC signal having a significantly higher frequency than the AC supply of the power line, so that frequency separation allows the data channel to be logically separated from the power supply. In principle, all standardized or non-standardized transmission technologies that use a power line for data communication by modulating an AC signal can be used.

[0008] According to the invention, an individual authorization control of the individual vehicles or consumers is provided by the communication provided by the power line, which is evaluated by the control unit, which removes connected vehicles from the network in the event of a lack of authorization. The query of the individual consumers at the individual sockets can be provided by push or pull data traffic, i. H. by a request from the control unit, to which the vehicles respond (pull mode), or by the vehicle automatically transmitting authorization data when it is connected (push mode).

[0009] The invention makes it possible to detect in a simple manner whether all vehicles connected to the power line are authorized to draw current. If at least one vehicle is detected as not authorized, the control unit can switch off the entire power line and thus all charging sockets at least for a period of time in order to deny access to unauthorized users. To do this, authorized vehicles transmit the requested charging current to the control unit via the data transmission described above (using the power line). The control unit thus has an overview of the total of all requested or received charging currents. At the same time, the control unit can record the power actually delivered to all charging sockets or the associated current, and compare the sum of the charging currents formed with the total charging current actually measured. If the actual, measured total charging current is higher than the sum of the transmitted charging current amounts, then the control device either switches off all sockets or switches off individual sockets or causes individual vehicles to interrupt the charging process in order to prevent unauthorized vehicles from re-recording the actual total charging current with the Compare sum of reported (and updated according to shutdown) charging current amounts. As a result, an unauthorized vehicle can be detected by a single, requested shutdown.

[0010] According to the concept on which the invention is based, the control unit therefore includes an interrupter to switch off the sockets if necessary, and a communication unit with which the individual charging current amounts or authorization information can be received from or sent to the vehicles. For individual shutdown, the communication device is also equipped to transmit shutdown commands to the individual vehicles individually. The control unit according to the invention also includes a data processing device that is set up for summing the reported charging current amounts, and a current measuring unit that records the total charging current in order to compare the sum of the reported amounts with the total charging current actually recorded. The result of the comparison is reported to the data processing unit, which controls the interrupter accordingly or also sends individual interrupt signals individually to the vehicles via the communication unit.

[0011] The concept on which the invention is based is implemented by the following methods, devices and their embodiments. The method according to the invention for checking the authorization of charging processes in electrically operated vehicles therefore provides for a control unit to be provided between a main connection and a large number of charging sockets which are connected to the control unit via a power line. In particular, electric vehicles and hybrid vehicles are referred to as electrically operated vehicles. The main connection can be provided by a fuse box, for example, and forms the root of the network, while the power line is a stub line that connects the individual charging sockets to the main connection and thus supplies them with power.

[0012] A vehicle to be charged is connected to one of the charging sockets, for example by connecting a charging connection of a vehicle to the charging socket via a charging cable. The total charging current, which is conducted from the main connection via the control unit to the charging socket, is recorded. In particular, the total charging current is recorded, which is transmitted to the control unit via an interrupter unit. Since the same voltage can essentially be assumed in power supply networks, the terms current and power are to be regarded as equivalent descriptions of energy transmission. In particular, the total charging current can be detected by means of a shunt resistor, i. H. by a voltage drop across a series resistor or by magnetic field measurements from which conclusions can be drawn about the current flow, for example using Hall sensors or induction coils.

[0013] Requests for charging current are sent to the control unit by each vehicle that is connected to the charging sockets. Preferably, each time the vehicle to be charged is connected to a charging socket, a charging current request takes place in order to register a new vehicle with the control unit. In addition, charging current requests from vehicles that are already connected are sent to the control unit on a regular basis in order to keep them up to date. The charging current requests can be requested by the control unit (pull operation) or can be transmitted proactively from the vehicle to be connected to the control unit (push operation). The charge current requests may be based on estimated charge current values ​​or target charge current values ​​provided by a charge controller of the vehicle, or may be measured charge current values ​​measured by a charge controller of a vehicle.

[0014] In order to check the authorization of all connected vehicles, the total charging current (i.e. the real, recorded total charging current) is compared with the sum of charging currents that are or have been transmitted to the control unit by the vehicles that are connected to the charging sockets. The charging currents of the vehicles are represented by the charging current requests. Requests for charging current are to be regarded as requests that are transmitted from the vehicle to the control unit in order to communicate which charging current is currently being requested or is being requested by the individual vehicles. The charging current requests therefore relate to charging currents received from the vehicle. Preferably, there is initially no need for a charging current request in order to supply a vehicle with charging current; instead, each charging socket provides the electrical power, with authorization being requested after the start of the provision and measures being taken if necessary.

[0015] Such a measure provides for charging sockets to be switched off if the total charging current exceeds the total. In particular, all charging sockets are switched off. Alternatively, only individual charging sockets are switched off, although this requires an additional switching module on each charging socket. In addition, by transmitting control information from the control unit to the vehicle, the vehicle can adjust the charging process so that the vehicle stops drawing electrical power from the charging socket at least temporarily due to the control command from the control unit. Such temporary cessation of vehicle charging enables identification of unauthorized vehicles after detecting that at least one unauthorized vehicle is connected to the power line.

[0016] Connecting a vehicle to be charged includes transmitting authorization information from the vehicle to the controller (either proactively or in response to a request from the controller). The authorization information is compared by the control unit with a list of authorized vehicles. This comparison also includes a comparison of the authorization information with stored credentials, for example credit card numbers, cell phone numbers, charging subscription identifiers, prepaid account identifiers or other authorization or payment information. Since these credentials are linked to the vehicle, for example via the vehicle's driver, such credentials are maintained in the form of a list of authorized vehicles. The entries in the list of authorized vehicles are therefore not only direct identifications of vehicles (e.g. their license plates), but also include evidence that the driver of the vehicle or drivers of the vehicle provide in the form of a general proof of entitlement. The comparison verifies the vehicle's entitlement (i.e., generally, verifies that the credential is valid or not). The transmission of the charging current requests (i.e. the indications of the charging current actually received) and the transmission of authorization information is provided via a wired transmission channel provided by the power line, i. H. in particular by modulating an alternating current signal onto the power line, the alternating current signal reflecting the authorization request or the charging current request. The transmission can also be encoded or provided via a security protocol. If a secure connection with the vehicle cannot be established, it is assumed that the vehicle is not authorized and the measures described above are carried out, so that a switch-off step described here is carried out in this case.

[0017] The step of transmitting authorization information is provided by transmitting a proof of authorization from the vehicle to the control unit, i. H. proactively or upon request by the control unit. Furthermore, the step of transmitting is provided by transmitting a request for a credential from the control unit to the vehicle, this corresponding to the pull operation. The vehicle then transmits the credential based on the credential request to the control unit, which corresponds to a response within the pull mode.

[0018] The authorization information can include payment information, with the control unit checking whether the payment information can be booked. The authorization can therefore be provided by transmission of payment information, for example a credit card number, whereby an authorization is issued when it is detected that the payment information can be booked. In this context, a list of authorized vehicles is not only to be understood as meaning not only identifications of the vehicles themselves, but also payment information that is linked to the vehicle via the owner or the driver of the vehicle. The vehicle is authorized by submitting valid payment information. In general, the control unit preferably maintains a list in which not only the requested or drawn charging currents are shown, but also identifiers of the vehicles, which are assigned to each charging current amount and are linked in the list together with the charging current amount. The identification can be an actual serial number, or it can also be provided by simply numbering the connected vehicles consecutively, with this numbering resulting, for example, from the order in which they were first connected. In particular, the identification of the vehicle includes only an identification that is unique for all connected vehicles, but may be ambiguous for the group of vehicles that are connected and that are not connected (but were connected in the past). In a particularly simple embodiment, the identifier that is provided together with the associated charging current value can be specified by the position within a list in which the charging currents (or their values) are shown. The i-th charging current entry thus corresponds to the vehicle with the identification number i.

[0019] The charging current requests are repeatedly or periodically transmitted from the vehicles to the control unit. These repeated or periodic requests are either proactively transmitted by the vehicle to the control unit as part of a push process, or are sent individually, repeatedly or periodically as a response to repeated or periodic requests from the control unit, which corresponds to a pull mode. This repeated or periodic transmission can be provided with a fixed time pattern, resulting in essentially continuous monitoring. For example, the process can be repeated every second or every minute or every quarter of an hour (or some other predetermined period of time). In the same way, the authorization information is preferably requested repeatedly or periodically or transmitted by the vehicles to the control unit, with the authorization information being able to be transmitted with the same time pattern as the charging current requests, preferably in a joint message, or with the authorization information offset or with a lower frequency can be transmitted from the vehicles to the control unit. The transmission of the charging current requests, the authorization information or the above-mentioned message from the vehicles to the control unit can be a proactive transmission as part of a push operation, or can be a response to a corresponding request by the control unit as part of a push operation. In particular, the authorization information is queried when it has been detected that the total charging current exceeds the sum, or when all charging sockets, at least one charging socket or now one charging socket is switched off.

[0020] As a mechanism for preventing unauthorized charging, the method provides switch-off mechanisms or query mechanisms that are carried out when the total charging current exceeds the sum. Specifically, these mechanisms are provided as follows. On the one hand, all charging sockets in front of the control unit can be switched off at least for a predetermined period of time if the total charging current exceeds the sum. The predetermined length of time may be a fixed period, such as one minute or five minutes. Alternatively, all charging sockets can be switched off by the control unit and remain switched off until the control unit is blocked or receives a corresponding signal. If all charging sockets are switched off for a predetermined period of time, the authorization query described above and the transmission of the charging current requests are preferably carried out when switching on at the end of the predetermined period of time. When switching on again after the predetermined period of time, all measures are carried out that are carried out when connecting a vehicle to be charged to one of the charging sockets. This applies in particular to the entire authorization query and control as well as the transmission of the charging current request.

[0021] According to a further embodiment, it is provided that the control unit terminates vehicle charging processes individually. In this case, the control unit transmits switch-off commands individually to the vehicles, with the vehicles interrupting the charging process when they receive the switch-off commands. The control unit performs the step of comparing after each interruption or after each transmission of the switch-off command. In the comparison, the reported charging current of the vehicle switched off or to be switched off by the switch-off command is subtracted from the sum of all reported charging currents. The corrected sum thus corresponds to a target value that reflects all reported charging currents. If the detected charging current exceeds this corrected sum, it can be assumed that an unauthorized vehicle is planning a charging process, or that the vehicle is not responding correctly to the switch-off command and is therefore losing authorization.

[0022] Based on the individual shutdowns, the control unit determines at least one vehicle by comparing the total charging current with the sum of the reported charging currents (in particular with the corrected sum) that is receiving charging current from the charging socket despite lack of authorization or the receipt of a shutdown command. The control unit causes this at least one vehicle to output a signal if it reacts to this in order to identify the unauthorized vehicle from the outside through the signal output. Alternatively, the control unit switches off the charging socket by transmitting an interruption signal to a switching module, the at least one vehicle being connected to this charging socket and receiving charging current from the charging socket despite a lack of authorization or despite a shutdown command having been received.

[0023] According to a further embodiment, the control unit determines at least one vehicle that is authorized to draw current on the basis of the individual shutdowns by comparing the total charging current with the sum of the reported charging currents. All vehicles that are connected and have authorization for charging and react to the shutdown command by interrupting the charging process are preferably determined by the individual shutdowns and the associated comparison processes. These identified, authorized vehicles are prompted by the control unit by means of a signal output command to carry out a signal output. In this way, all vehicles that have authorization are identified from the outside by the signal output. In contrast to the method described above, in which only non-authorized vehicles are prompted to emit a signal, according to the embodiment described here, all other vehicles are identified by all authorized vehicles emitting a signal that is visible from the outside.

[0024] The actuation of the turn signal lights, a driving light or actuation of the horn for a short period of time, for example 5 seconds, is particularly suitable as a signal output.

[0025] The invention also provides a control unit with a main supply connection, a delivery connection, an interrupter unit and a communication unit. The main supply connection is set up to be connected to a central power supply network connection, which can also be referred to as the main connection. The output port is configured to carry power from the main port and to be connected to a power line for controlled delivery to a plurality of charging sockets (connected to the power line). The breaker unit is connected between the main supply port and the output port. A current measuring unit of the control unit is connected to the main supply connection, output connection or in between to detect the current flowing through the control unit. The communication unit is connected to the output port to establish another logical channel for the power line. To this end, the communication unit includes a demodulator and a modulator in order to send and receive data via modulated signals via the output connection and a power line that can be connected to it.

[0026] The control unit also includes a data processing unit that implements various control mechanisms. This is connected to the communication unit in order to use this and the delivery connection to store charging current information from charging current requests that are sent to the communication unit in a charging current amount memory. As a result, the data processing unit can store all the individual charging currents as communicated by the connected vehicle. Furthermore, the data processing unit is set up, for example by means of an adder, to sum the charging current information and thereby to record the sum of the charging currents of the vehicles that are connected to the charging sockets, which in turn can be connected to the delivery connection via the power line. In addition, the data processing unit is set up, for example by means of a comparator, to compare this sum with the total current that is recorded by the current measuring unit. This comparator or the data processing unit thus provides a decision-making authority that recognizes impermissible power consumption and then takes action. In particular, as a measure, the data processing unit controls the interrupter unit by sending an interrupt signal if the data processing unit determines through the comparison that the sum of the reported current draws (i.e. the charging current information and their charging current information) exceeds the total current delivered.

[0027] In addition, the data processing unit is set up to receive authorization information from the vehicles (or to request them from them) in order to evaluate them and check the authorization. To this end, authorization information is sent from the vehicles to the delivery connection via the power line, which can be connected to the delivery connection, and the data processing unit connected to the delivery connection via the communication unit evaluates the received authorization information. To this end, the authorization information is verified by comparing it with a list of authorized vehicles. The list of eligible vehicles may be reflected not only by vehicle identification itself, but also by payment or subscription information authorizing power collection. In this case, the list is stored in a memory of the control unit or the data processing unit. Alternatively, the list can be maintained in a remote authorization query system, in which case the control unit also includes a remote transmission interface in order to send information, and in particular the authorization information, via the remote transmission interface to an authorization query system that can be connected to it. The long-distance transmission interface can in particular be provided by an internet connection, for example via a WLAN access point, or a radio network-based internet connection such as via GPRS and WAP. In particular, the remote transmission interface can be provided for the types of transmission described above, for example as a WLAN radio module or as a mobile network radio module, or also as a powerline module that is set up to connect the control unit to the Internet via the main supply connection with a transmission protocol based on the supply network.

[0028] According to a further embodiment of the invention, the data processing unit, together with the communication unit connected to it, is set up to receive authorization information in the form of proof of authorization from the vehicle via the delivery connection. Furthermore, the data processing unit is set up to compare the proof of authorization with the list and thus to verify the proof of authorization. In principle, the proof of authorization can be transmitted proactively by the vehicle or transmitted by the control unit after a request. Therefore, the data processing unit is also set up to send authorization information in the form of a request for a credential to the vehicle via the delivery connection, or is set up to both send the request for the credential to the vehicle and to receive the credential from the vehicle via the delivery connection.

[0029] According to a further embodiment, the data processing unit, together with the connected communication unit, is set up to receive payment information within the authorization information via the delivery connection. In this case, the data processing device does not process any proof of entitlement itself, but rather regards valid payment information as equivalent to a proof of entitlement. Therefore, the data processing unit, together with the remote transmission interface connected to it, is set up to send a remote query to a remote booking database, and is also set up to receive a bookability confirmation from the booking database via the remote transmission interface, with the bookability confirmation upon receipt as a verified credential from the Data processing unit is viewed and then the associated charging current request is included in the sum of the charging currents. Alternatively, the accounting database can be provided within the control unit. Other options are prepaid constructions, in which the authorization information in the form of an available amount of money (or an electricity equivalent) is sent from the vehicle to the data processing unit, which then evaluates the amount of money and, for example together with a maximum duration, the associated vehicle as authorized in stores a memory of the control unit.

[0030] The data processing unit, together with the communication unit connected to it, is also set up to repeatedly or periodically send a charging current amount request to the vehicles via the delivery connection. Furthermore, the data processing unit, together with the communication unit, is set up to receive an associated charging current amount response from the vehicles via the delivery connection. The data processing unit is then set up to update charging current entries in the charging current amount memory in accordance with the charging current amount response. The charging current amount memory is provided in the control unit or as part of the data processing unit as a read / write memory. This can be non-volatile or volatile.

[0031] According to a further embodiment, the data processing unit is set up to send an interrupt signal to the interrupter unit for a predetermined period of time if the data processing unit determines that the total exceeds the total current supplied. Furthermore, the data processing unit can be set up to transmit an interruption signal or a signal output command via the output connection to the vehicles or to switching modules of the charging sockets individually for a predetermined period of time or continuously. This linking of the data processing unit and the interrupter unit via the interrupt signal provides a blocking mechanism which prevents unauthorized vehicles from being loaded. In the same way, a mechanism can be provided by the interruption signal via the delivery connection, which interrupts individual vehicles at least temporarily in their charging process in order to detect through the individual check which of the vehicles is not reacting to the interruption signal and / or is not authorized to receive charging current Has. Alternatively, the charging sockets can be provided with switching modules that convert the interrupt signal, with regard to the control unit being provided for this purpose that the data processing unit is set up to control these charging sockets via the output connection as a data transmission interface. In order to provide the predetermined period of time, the control unit can include a timer that determines the period of time. Likewise, the control unit can include a timer that repeatedly or periodically transmits the charging current amount request to vehicles. Brief description of the character

[0032] the figure 1 shows a block diagram for a more detailed explanation of the invention, including an embodiment of the control unit according to the invention. Detailed description of the drawing

[0033] the figure 1 shows a control unit according to the invention 100 within a usual environment. The components shown for the control unit according to the invention are shown with solid lines, with the components of the usual operational environment being shown with dashed lines. All three-digit reference symbols relate to components of the control unit according to the invention, and all two-digit reference symbols relate to components of the environment in which the control unit is used and which do not belong to the invention but are helpful for explaining the invention in more detail. The control unit 100 includes a main supply connection 110 and a delivery port 120 and an intermediate breaker unit 130 . Finally, the control unit according to the invention comprises 100 a communication unit 140 , which in turn is used to modulate an AC signal with the output terminal 120 connected is. The connection between communication unit 140 and delivery port 120 is shown with arrows that show bidirectional data traffic, the connection being set up only for data transfer. Other connections that are only set up for data transfer are in the figure 1 shown with arrows. The arrows indicate the data transfer direction. Connections that do not have arrows are connections for the transmission of electrical power.

[0034] The control unit also includes a current measuring unit 150 , which the current flow of the output port 120detected and in the form of a data signal to a data processing unit 160 the control unit sends. The communication unit 140 also includes a demodulator and a modulator for transmitting data in both directions, with neither modulator nor demodulator in figure 1 are shown. The data processing unit 160 is also equipped with a storage 170 connected, in which, among other things, charging current information is stored, via the communication unit 140 from the delivery port 120 have been received and to the data processing unit 160 were transferred. The data processing unit also includes signal generators for generating corresponding data signals, a comparator and an adder, which, however, are not shown in detail for reasons of simplicity. These components may also be provided by software driving a programmable processor that implements these components along with the software. In the same way, the associated pieces of software represent implementations of the corresponding procedural steps.

[0035] The data processing unit 160 is also for driving the interrupter unit 130 connected to this, being from the data processing unit 160 an interrupt signal to the interrupter unit 130 is sent when it is detected that the current measuring unit 150 The total current that is actually delivered exceeds the sum of all charging current specifications that are in the memory 170 are saved.

[0036] The main supply connection 110 is set up to have a wired connection port 10 with a supply network 20 to be connected. According to the invention, electrical power of the supply network 20 through the control unit according to the invention to the delivery port 120 the control unit 100 delivered. The delivery port 120 is also set up via an electrical connection 30 with a power line 40 to be connected to the multiple charging sockets 50 are connected. The charging sockets 50 themselves are optionally connected to vehicles, in particular to charging controls 60 of the vehicles, which according to the invention via the power line 40 use the supplied electricity for charging. Furthermore, the loading controls 60 set up, authorization information and charging current requests via the sockets 50 to the power line 40 to transmit. Because the delivery port 120 with the power line 40 is set up to be connectable, can be controlled by the charge controllers 60 the vehicles sent signals within the control unit according to the invention 100 are detected by these first from the communication unit 140 be demodulated and after demodulating via a data connection via the data processing unit of the control unit 100 be transmitted.

Claims

[1] Method for controlling the authorization of charging operations of electrically powered vehicles, comprising the steps: Provision of a control unit ( 100 ) between a main connection ( 110 ) and a large number of charging sockets ( 50 ), which is connected to a power line ( 40 ) with the control unit ( 100 are connected; Connecting a vehicle to be charged ( 60 ) with one of the charging sockets ( 50 ); Capturing a total charging current from the main terminal ( 110 ) via the control unit ( 100 ) to the charging sockets ( 50 ) is directed; Transmitting charging current requests from anyone to the charging sockets ( 50 ) connected vehicles to the control unit ( 100 ); Comparing the total charging current with the sum of the charging currents of the vehicles connected to the charging sockets ( 50) connected; and Switching off the charging sockets ( 50 ) if the total charging current exceeds the sum, where Connecting a vehicle to be charged is a step in transmitting authorization information from the vehicle ( 60 ) to the control unit ( 100 ) includes and the authorization information is compared by the control unit with a list of authorized vehicles to verify the vehicle's authorization, and wherein the transmission of charging current requests and authorization information is provided by modulating an alternating current signal onto the power line ( 40 ), which reflects the authorization request or the charging current request. [2] Method according to claim 1, wherein the step of transmitting authorization information is provided by transmitting an authorization certificate from the vehicle ( 60 ) to the control unit ( 100), by submitting a request for proof of authorization from the control unit ( 100 ) to the vehicle ( 60 ), or both. [3] A method according to any of the aforementioned claims, wherein the authorization information includes payment information, wherein the control unit ( 100 ) checks whether the payment information can be booked. [4] Method according to one of the preceding claims, wherein the charging current requests are repeatedly or periodically made by the vehicles during the charging process ( 60 ) to the control unit ( 100 ) are transmitted and reflect a charging current amount that is supplied by the vehicle ( 60 ) is requested or from the vehicle ( 60 ) via the charging socket ( 40 ) is received. [5] Method according to any of the preceding claims, wherein, if the total charging current exceeds the sum, (a) all charging sockets ( 40) from the control unit ( 100 ) be switched off at least for a predetermined period of time, or (b) the control unit sends shutdown commands to the vehicles ( 60 ) individually transmitted, the vehicles ( 60 ) interrupt the charging process upon receiving the shutdown commands; the control unit ( 100 ) performs the comparison step after each interruption, comparing the reported charging current of the vehicle switched off by the shutdown command ( 60 ) is subtracted from the total; and (i) the control unit ( 100 ) due to the individual shutdowns at least one vehicle ( 60 ) by comparing the total charging current with the sum of the reported charging currents, it was determined that charging current was being drawn from the charging socket despite a lack of authorization or a received shutdown command ( 50 ) receives, and the control unit ( 100 ) a signal output from this at least one vehicle ( 60) caused or the charging socket ( 50 ), to which at least one vehicle is connected, by transmitting an interruption signal to a switching module of the charging socket ( 50 ) switches off, or (ii) the control unit, due to the individual shutdowns, at least one vehicle ( 60 ) by comparing the total charging current with the sum of the reported charging currents, which is authorized to draw current and which interrupts the charging process due to the received shutdown command, and the control unit initiates a signal output from this vehicle. [6] Control unit for verifying the authorization of charging operations of electrically powered vehicles, comprising: a main supply connection ( 110 ), a delivery connection ( 120 ), an interrupter unit connected between them ( 130 ) as well as a communication unit ( 140 ), wherein the control unit (100 ) furthermore, a current measuring unit ( 150 ) for recording the total electricity delivered at the outlet, and the communication unit ( 140 ) with the delivery connection ( 120 ) is connected and includes a demodulator and a modulator to receive and send data from the output port as modulated signals; the control unit also includes a data processing unit ( 160 ) includes those connected to the communication unit ( 140 ) is connected, and is set up to store charging current information in charging current requests, which are transmitted with the modulated signals from the vehicles, in a charging current amount memory ( 170 ) the control unit ( 100 ) to store and compare their sum with the total electricity delivered at the discharge point, whereby the data processing unit ( 160 ) is set up to operate the interrupter unit ( 130) to open if the sum exceeds the total delivered current; and where the data processing unit ( 160 ) is further set up to receive authorization information and compare it with a list of authorized vehicles, which is either stored in a memory ( 170 ) is stored in the control unit, or is set up via a remote transmission interface to send the authorization information to a remote authorization query system that maintains the list. [7] Control unit according to claim 6, wherein the main supply connection ( 110 ) is set up, to a main connection ( 10 ) to be connected, the interrupter unit ( 130 ) between main supply connection ( 110 ) and delivery connection ( 120 ) is switched on, and the delivery connection ( 120 ) is set up, connected to a power line ( 40) for the controlled supply of a large number of charging sockets connected to the power line ( 50 ) to be connected; The demodulator enables the communication unit to receive modulated signals present at the output port, and the modulator enables the communication unit to send data as modulated signals via the output port; the data processing unit ( 160 ) is set up to sum the charging current data, whereby the data processing unit ( 160 ) to sum charging current data from different vehicles connected to charging sockets which are connected to the delivery port ( 120 ) are connectable; the data processing unit ( 160 ) with the interrupter unit ( 130) is connected and configured to send an interrupt signal to the interrupt unit when the data processing unit ( 160 ) determines that the sum exceeds the total delivered current; and the data processing unit ( 160 ) is also set up to receive the authorization information via the remote transmission interface. [8] Control unit according to claim 6 or 7, wherein the data processing unit ( 160 ), together with the communication unit connected to it ( 140 ), is set up, authorization information in the form of an authorization certificate from the vehicle via the delivery connection ( 120 ) to receive and compare this with the list, or is set up to send authorization information in the form of a request for proof of authorization to the vehicle via the delivery connection ( 120 ) to send, or both. [9] Control unit according to claim 6, 7 or 8, wherein the data processing unit ( 160 ), together with the communication unit connected to it ( 140 ) is set up, a payment information within the authorization information about the delivery connection ( 120 ) to receive and wherein the data processing unit ( 160 ), together with the remote transmission interface connected to it, to send a remote query to a remote booking database and to receive a booking confirmation from the booking database via the remote transmission interface. [10] Control unit according to one of claims 6–9, wherein the data processing unit ( 160 ), together with the communication unit connected to it ( 140) is set up to repeatedly or periodically send a charging current amount request to the vehicles via the delivery port and a corresponding charging current amount response via the delivery port ( 120 ) from the vehicles ( 60 ) to receive, wherein the data processing unit is further configured to store charging current entries in the charging current amount memory ( 170 ) to update according to the charging current amount response. [11] Control unit according to one of claims 6–10, wherein the data processing unit is configured to connect to the interrupter unit ( 130 ) to send an interrupt signal for a predetermined duration when the data processing unit determines that the sum exceeds the total delivered current, or wherein the data processing unit ( 160 ) is set up to send an interrupt signal or a signal output command via the output port ( 120) to be sent to the vehicles or to the switching modules of the charging sockets individually for a predetermined period of time or continuously.

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