Method and device for carrying out a charging process of an electrically powered vehicle

Abstract

The invention relates to a method for carrying out a charging process of an electrically powered vehicle (2). According to the invention, - a charging process of an electrical energy storage device (1) of the vehicle (2) carried out at an energy source (3) is monitored by means of a vehicle-external computing unit (6) which is or can be coupled to the vehicle (2) in terms of data technology, and - in the event of an interruption of the charging process (UL) detected by the computing unit (6), a wake-up signal (AS) is transmitted by the computing unit (6) to a vehicle data bus system required to carry out the charging process and / or - after resuming the charging process following an interruption (UL) thereof or a temporary reduction in a charging current (I) carried out by means of the energy source (3), the computing unit (6) checks whether a charging current (I) is limited on the vehicle side to a value which is lower than a maximum charging current (I) that can be made available by the energy source (3), and if a limitation is present, the computing unit (6) increases the value of the charging current (I) limited on the vehicle side as a function of a time period remaining until the end of the charging process and / or a target charge state of the energy store (1). The invention further relates to a device (5) for carrying out a charging process of an electrically operated vehicle (2).

Description

The invention relates to a method for carrying out a charging process of an electrically operated vehicle.The invention further relates to a device for carrying out a charging process of an electrically operated vehicle.US 2013 / 0 015 814 A1 discloses a system and a method for notifying a vehicle user. The notification is made when a charging process of an electric vehicle is unexpectedly interrupted. The system monitors a connection between the electric vehicle and an external electric charging device and issues a command to a notification system to send the notification to the vehicle user when an interruption is detected. DE 10 2022 210 620 A1 describes a method for controlling a charging process, a vehicle, a computer program product and a storage medium. DE 10 2013 010 774 A1 mentions a method for operating a charging station and DE 10 2015 226 318 A1 mentions a method and a charging device for charging a traction energy store of an electrically driven vehicle. In addition, DE 10 2022 205 101 A1 and DE 10 2010 029 934 A1 show an automated charging process for a motor vehicle or a method for monitoring the operating state of a vehicle, in particular an electric or hybrid vehicle.It is an object of the present invention to specify a novel method and a novel device for carrying out a charging process of an electrically operated vehicle.The object is achieved according to the invention by a method which has the features specified in claim 1 and by a device which has the features specified in claim 10.Advantageous embodiments of the invention are the subject matter of the dependent claims.In the method for carrying out a charging process of an electrically operated vehicle, it is provided according to the invention thata charging process of an electrical energy store of the vehicle carried out at an energy source is monitored by means of a vehicle-external arithmetic unit which is coupled or can be coupled to the vehicle in terms of data, anda wake-up signal is transmitted by the arithmetic unit to a vehicle data bus system required for carrying out the charging process in the event of an interruption of the charging process detected by the arithmetic unit; and / orafter resuming the charging process after interrupting the same or temporarily reducing a charging current carried out by means of the energy source, the arithmetic unit checks whether a charging current is limited on the vehicle side to a value which is less than a charging current which can be made available at the maximum by the energy source, and if a limitation is present by means of the arithmetic unit, the value of the charging current limited on the vehicle side is increased as a function of a time period remaining until the charging process is ended and / or a target charging state of the energy store.Due to the growing use of renewable energies for energy supply and their weather dependence, increased fluctuations in the energy supply, i.e. an oversupply or lack of electrical energy, can occur. To compensate for these fluctuations, flexible controllable electrical loads, for example charging electric vehicles, can be used. In situations with a lack of electrical energy, an active charging process of an electric vehicle can be interrupted temporarily, for example for a period of two hours, by means of an external control intervention at the energy source. For this purpose, the energy source, for example a so-called wallbox or a public charging column, sets an available charging current to the value zero at the beginning of the control intervention and, after the end of the control intervention, to a maximum available value again. The vehicle then interrupts the charging process for the duration of the control intervention and should continue the latter after the end of the control intervention. Depending on the duration of the control intervention and configuration of the vehicle, the interruption of the active charging process reaches a state in which the vehicle data bus system required for carrying out the charging process is placed in a sleep state, also referred to as data bus sleep. This idle state prevents the energy store of the vehicle from being charged again correctly after the end of the control intervention. As a result, the energy store is not charged further after the control intervention, so that a state of charge of the energy store may not be sufficient if a vehicle user wishes to drive his trip.The vehicle data bus system is understood to mean a data processing unit in which a plurality of devices, for example control devices, are coupled to one another by means of at least one data bus line and communicate via this data bus line.Due to the monitoring of the charging process by means of the vehicle-external computing unit, the present method enables a particularly reliable transmission of the wake-up signal to the vehicle data bus system required for carrying out the charging process, so that an increase in robustness of charging processes with external control interventions is increased by reducing a probability that the charging process is not correctly continued after the control intervention. This reduces a risk that the energy store of the vehicle is not sufficiently charged when a following journey is started. This in turn results in an increase in availability of the vehicle and thus in the mobility of vehicle users. This increase in the robustness of the charging process, the availability of the vehicle and the mobility of the vehicle users makes it possible to achieve successful market penetration of electric vehicles, making an important contribution to the climate and environmental protection and to the success of a vehicle manufacturer with companies. Also, the method enables external control interventions required to ensure stable power supply to be performed robust.In addition, it is possible that after an interruption of a charging process or a temporary reduction of a charging current carried out by means of an energy source, a maximum charging current preset at the beginning of the charging process, for example by selection of a specific charging program, is not sufficient to charge the energy store to a desired charging state in a remaining time until an end of the charging process. On the basis of the check carried out by means of the arithmetic unit whether there is a vehicle-side limitation of the charging current to a value below a maximum charging current which can be made available by the energy source, and the increase of the vehicle-side-limited value of the charging current, the method makes it possible that the energy store of the vehicle is sufficiently charged even in situations of this type when a following journey begins.In one possible embodiment of the method, a signal for maintaining an active state of the vehicle data bus system is transmitted as a wake-up signal. This reliably prevents the vehicle data bus system from being put into the idle state. Thus, a charging process can be started again particularly quickly and reliably after an interruption of the same and completion of the control intervention.In a further possible embodiment of the method, the signal is transmitted to the vehicle data bus system at regular time intervals, for example at a distance of five minutes. For example, the time interval is selected to be smaller than a time duration after which the vehicle data bus system is put into the idle state in the event of an interruption of the charging process. This makes it possible to avoid the idle state of the vehicle data bus system in a particularly reliable manner during an interruption of the charging process.In a further possible embodiment of the method, an activation signal is transmitted to the vehicle data bus system as a wake-up signal when a sleep state of the vehicle data bus system resulting from the interruption of the charging process is detected by means of the computing unit. This enables the vehicle data bus system to be activated or "awakened" from the idle state, so that a charging process can be restarted particularly quickly and reliably after an interruption of the same and completion of the control intervention.In a further possible embodiment of the method, in the case of a detection, carried out by means of the computing unit, of a loss of authentication of the vehicle at the energy source resulting from the interruption of the charging process, a request signal for reauthentication of the vehicle at the energy source is transmitted by means of the computing unit to the vehicle and / or the energy source. Such a loss of authentication can occur, for example, when a charging time of the vehicle at the energy source has expired due to a duration of the control intervention and a duration of the interruption of the charging process associated therewith. By transmitting the request signal for reauthentication of the vehicle to the energy source, it is made possible that the charging process of the energy store can be continued reliably after the charging process has been interrupted and the authentication has been lost.In a further possible embodiment of the method, it is provided that during the monitoring of the charging processa setpoint charging current and an actual charging current are interrogated by the vehicle and / or the energy source by means of the arithmetic unit,values of the setpoint charging current and of the actual charging current are transmitted to the arithmetic unit by means of the vehicle and / or the energy source,comparing the values of the desired charging current and the actual charging current by means of the arithmetic unit; andthe interruption of the charging process is detected by means of the arithmetic unit if the actual charging current is zero and / orthe vehicle-side limitation of the charging current is detected by means of the arithmetic unit if the actual charging current is less than the maximum charging current that can be made available by the energy source.The monitoring of the setpoint charging current and of the actual charging current can be carried out in a particularly simple and reliable manner with little hardware outlay.In a further possible embodiment of the method, the data-technology coupling of the vehicle to the computing unit is carried out by means of a mobile radio network. This enables a reliable data transmission between the vehicle and the computing unit.In a further possible embodiment of the method, the wake-up signal is transmitted as a short message to the vehicle via the mobile radio network by means of a short message service, also referred to as short message service, SMS for short. Since a telecommunication module of the vehicle dialing in the mobile radio network is generally permanently activated, even during periods when the data bus is idle, a particularly reliable transmission and a particularly reliable reception of the wake-up signal are made possible by the transmission of the wake-up signal as a short message to the telecommunication module by means of the short message service.In a further possible embodiment of the method, a cloud server or backend server is used as the central processing unit. Such servers enable reliable and effective monitoring of the charging process and execution of the method external to the vehicle.The device for carrying out a charging process of an electrically operated vehicle is distinguished according to the invention in thatthe vehicle can be coupled or is coupled to a vehicle-external computing unit by data technology; andthe arithmetic unit is designed,monitoring a charging process of an electrical energy store of the vehicle carried out at an energy source, andtransmitting a wake-up signal to a vehicle data bus system required for carrying out the charging process in the event of an interruption of the charging process detected by the computer unit; and / orafter resuming the charging process after interrupting the same or temporarily reducing a charging current carried out by means of the energy source, to check whether a charging current is limited on the vehicle side to a value which is less than a charging current which can be made available at the maximum by the energy source, and if a limitation is present, to increase the value of the charging current limited on the vehicle side as a function of a time period remaining until the charging process is ended and / or a target charging state of the energy store.Due to the monitoring of the charging process by means of the vehicle-external computing unit, the present device enables a particularly reliable transmission of the wake-up signal to the vehicle data bus system required for carrying out the charging process, so that an increase in robustness of charging processes with external control interventions is increased by reducing a probability that the charging process is not correctly continued after the control intervention. This reduces a risk that the energy store of the vehicle is not sufficiently charged when a following journey is started. This in turn results in an increase in availability of the vehicle and thus in the mobility of vehicle users. This increase in the robustness of the charging process, the availability of the vehicle and the mobility of the vehicle users makes it possible to achieve successful market penetration of electric vehicles, making an important contribution to the climate and environmental protection and to the success of a vehicle manufacturer with companies. Also, the method enables external control interventions required to ensure stable power supply to be performed robust. On the basis of the check carried out by means of the arithmetic unit whether there is a vehicle-side limitation of the charging current to a value below a maximum charging current which can be made available by the energy source, and the increase of the vehicle-side-limited value of the charging current, the device makes it possible for the energy store of the vehicle to be sufficiently charged even in situations of this type when a following journey begins.Exemplary embodiments of the invention are explained in more detail below with reference to drawings.The following are shown: FIG. 1 schematically shows a profile of a charging current, a profile of a state of charge of an electrical energy store and a state of charge during a charging process according to the prior art, FIG. 2 schematically shows a device for carrying out a charging process of an electrically operated vehicle and an energy network, and FIG. 3 schematically shows a profile of a charging current, a profile of a state of charge of an electrical energy store and a state of charge during a charging process carried out by means of the apparatus according to FIG. 2.Corresponding parts are provided with the same reference numerals in all figures.FIG. 1 shows a profile of a charging current I as a function of time t, a profile of a state of charge SOC as a function of time t and a state of charge LS as a function of time t during a charging process of an electrical energy store 1 of an electrically operated vehicle 1 according to the prior art, which is also shown in more detail in FIG. 2. The charging status LS can have the states "charging cable unconnected LK", "interruption of the charging process UL", "end of the charging process EL" and "charging C" in the present case.For charging the energy store 1, the latter is electrically coupled to an energy source 3, for example a public charging column or a wallbox, which is illustrated in more detail in FIG. 2 and makes available electrical energy for charging the energy store 1.In certain situations, for example in the event of a lack of electrical energy in an electrical energy network 4 coupled to the energy source 3 and likewise illustrated in FIG. 2, an active charging process of the energy store 1 can be interrupted temporarily by means of an external control intervention SE. In this case, the energy source 3 sets an available charging current I to the value zero at the beginning of the control intervention SE and, after the end of the control intervention SE, to a maximum available value again. The vehicle 2 then interrupts the charging process for the duration of the control intervention SE and should continue the latter after the end of the control intervention SE. Depending on the duration of the control intervention SE and the configuration of the vehicle 2, the interruption of the active charging process reaches a state in which a vehicle data bus system required for carrying out the charging process is put into a sleep state. This idle state prevents the energy store 1 from being charged again correctly after the end of the control intervention SE. As a result, the energy store 1 is not charged any further after the control intervention SE, so that the state of charge SOC of the energy store 1 may not be sufficient if a vehicle user wishes to drive his journey.This is illustrated on the basis of the time curves of the charging current I, the state of charge SOC and the state of charge LS.After a start ST of the charging process, in the charging state LS "charging C" by means of the charging current I, the energy store 1 is electrically charged, so that its state of charge SOC rises. During the presence of the external control intervention SE, in the charging status LS "interruption of the charging process UL", the charging is interrupted by the charging current I being set to the value zero. The state of charge SOC remains at least substantially constant during this interruption. After the end of the control intervention SE, the charging process is not continued on account of the state of rest of the vehicle data bus system, so that at the end of the charging process EL in the charging state LS "end of the charging process EL" and "charging cable unconnected LK" after disconnection of the charging cable 8 from the energy source 3 the state of charge SOC is unchanged and may not be sufficient for subsequent tasks of the vehicle 2.FIG. 2 shows a possible exemplary embodiment of a device 5 for carrying out a charging process of an energy store 1 of an electrically operated vehicle 2 and an electrical energy network 4. FIG. 3 shows a possible profile of a charging current I as a function of the time t, a possible profile of a state of charge SOC of the electrical energy store 1 as a function of the time t and a state of charge LS during a charging process of the electrical energy store 1 carried out by means of the device 5 according to FIG. 2.The energy network 4 can be a public energy network 4 or a local energy network 4, for example an electrical domestic network.The device 5 comprises the energy source 3 electrically coupled to the energy network 5, for example a public charging station or a wallbox, a vehicle-external computing unit 6 and at least one application unit 7.The computing unit 6 is, for example, a cloud server or a backend server.The vehicle 2 is coupled wirelessly, for example by means of a mobile radio network MN, to the computing unit 6 by data technology.Furthermore, the vehicle 2 is coupled to the energy source 3 by means of a charging cable 8 in order to carry out the charging process of the energy store 1. In this case, the vehicle 2, the charging cable 8 and the energy source 3 are in particular designed in such a way that the vehicle 2 can communicate with the energy source 3 via the charging cable 8.As already explained in the description of FIG. 1, external control interventions SE of the energy grid 4 can lead to an interruption of the charging process UL of the energy store 1. Such a control intervention SE can be, for example, a so-called mains-service control intervention SE in order to compensate for a lack of electrical energy in a public energy network 4. The control intervention SE can also be a control intervention SE of the domestic network in order to interrupt the charging process, for example, in the event of a lack of electrical excess energy obtained from solar energy.As likewise already explained in the description of FIG. 1, interruptions of the charging process caused by the control intervention SE can lead to a state of rest of a vehicle data bus system required for carrying out the charging process.After an interruption of the charging process, the following fault cases can occur, for example:Fault 1: Fault Case 1:After the end of the control intervention SE, the energy source 3 outputs a maximum available charging current I, for example 32 A. The vehicle 2 begins to charge again, but does not charge with the maximum available charging current I, but rather, for example, with a reduced charging current I of 20 A. This can result, for example, from a charging program, for example a so-called ECO charging program, having been selected at the beginning of the charging process, which limits the maximum charging current I. This leads to the risk that a time t available after the interruption of the charging process UL is no longer sufficient to charge the energy store 1 until a desired state of charge SOC is reached. This fault case can also occur when the charging process is not interrupted, but the charging current I has been temporarily reduced.Error 2: Error case 2:Due to the duration of the control intervention SE and the associated interruption of the charging process UL, the vehicle data bus system is put into the idle state in order to save energy. This state is also referred to as a "sleep state" of the vehicle 2. If the energy source 3 now specifies a maximum available charging current I greater than 0 A after termination of the control intervention SE, the vehicle 2 in the idle state cannot react to this and does not start to charge again, but remains in the interruption of the charging process UL.Fault 3: Fault case 3:Due to the duration of the control intervention SE and the associated interruption of the charging process UL, a charging time or a session of the vehicle 2 at the energy source 3 for which the vehicle 2 was authenticated at the energy source 3 (for example via a charging card in order to assign an amount of energy and payment information) has expired. After completion of the control intervention SE, the vehicle 2 is no longer authorized by the energy source 3 to obtain charging current I therefrom. An internal logic of the energy source 3 now prevents a maximum available charging current I greater than 0 A from being able to be predefined. The vehicle 2 accordingly does not begin to recharge again.The described error cases can also occur in combination. For example, the vehicle data bus system can fall into the idle state (error case 2) and also lose the authentication at the energy source 3 (error case 3). As a result of these fault cases, a desired target state of charge of a vehicle user of 100% SOC, for example, may not be reached at a point in time at which the user wishes to arrive at the next trip.In order to avoid the non-resumption of the charging process, which is illustrated in FIG. 1 and described on the basis of the above-described fault cases, or charging with excessively low charging current I (fault case 1), after an interruption of the charging process UL caused by an external control intervention SE, the charging process is monitored by means of the arithmetic unit 6.If the arithmetic unit 6 detects an interruption of the charging process UL, it sends a wake-up signal AS to the vehicle data bus system required for carrying out the charging process, so that the latter is not transferred into the idle state or is reactivated or "woken up" from the latter. The wake-up signal AS is transmitted to the vehicle 2 in particular via a mobile data network of the mobile radio network MN, wherein the computing unit 6 establishes a communication with the vehicle 2 via the mobile radio network MN and can send messages to the vehicle 2 via standard communication protocols, such as HTTPS, for example. If such communication via the mobile data network of the mobile network MN cannot be established on account of the idle state of the vehicle data bus system, it is provided in a possible embodiment that the wake-up signal AS is transmitted to the vehicle 2 via the mobile radio network MN as a short message by means of a short message service, also referred to as short message service, SMS for short. Since a telecommunication module of the vehicle 2 dialing in the mobile radio network MN is generally permanently activated, even during periods when the data bus is idle, a particularly reliable transmission and a particularly reliable reception of the wake-up signal AS are made possible by the transmission of the wake-up signal AS as a short message to the telecommunication module by means of the short message service.In this case, the arithmetic unit 6 detects the interruption of the charging process UL, in particular by monitoring the charging current I, wherein in this case the charging current I is monitored.a setpoint charging current and an actual charging current are requested from the vehicle 2 and / or the energy source 3 in a request A by means of the arithmetic unit 6,values of the setpoint charging current and of the actual charging current are transmitted to the arithmetic unit 6 by means of the vehicle 2 and / or the energy source 3 in a transmission,comparing the values of the desired charging current and the actual charging current by means of the arithmetic unit 6; andthe interruption of the charging process UL is detected by means of the arithmetic unit 6 if the actual charging current is zero.Furthermore, the arithmetic unit 6 detects the vehicle-side limitation of the charging current I (fault case 1) when the actual charging current is less than a maximum charging current I that can be made available by the energy source 3.For the above-described fault cases, the charging process is carried out by means of the device 5 as described below:For Fault 1:After termination of the control intervention SE, which has led to the interruption of the charging process UL and / or temporary reduction of the charging current I, the actual charging current is detected by means of the arithmetic unit 6 in the monitoring of the charging process by means of the arithmetic unit 6. If a deviation from the maximum available charging current I is detected, which is caused, for example, by the selection of the charging program, a change in the charging program on the vehicle side as a function of a time duration remaining until the end of the charging process and / or a target state of charge of the energy store 1 can be initiated by the arithmetic unit 6, which brings about an increase in the charging current I. This is necessary in particular if the actual charging current causes a significantly later end of the charging process EL or the energy store 1 of the vehicle 2 would not reach a state of charge SOC desired by the vehicle user until the next departure time.For Error 2:If a control intervention SE is detected by the computing unit 6 during the charging process, the computing unit 6 sends a signal for maintaining an active state of the vehicle data bus system as wake-up signal AS at regular time intervals, for example every five minutes, during the control intervention SE, that is to say the interruption of the charging process UL. Such a wake-up signal AS can be realized, for example, by periodic interrogation of the vehicle data bus system. The vehicle data bus system thus remains active and the idle state does not occur. The fault case 2 is thus prevented.If the vehicle data bus system is already in the idle state due to the interruption of the charging process UL caused by the control intervention SE, an activation signal is transmitted to the vehicle data bus system as a wake-up signal AS, which interrupts the idle state of the vehicle data bus system at least briefly. In this transmission, the wake-up signal AS is transmitted, in particular as a short message, by means of the short message service to the telecommunication module of the vehicle 2 selected in the mobile radio network MN, since in the idle state of the vehicle data bus system, the communication via the mobile data network of the mobile radio network MN may not be possible.For Fault Case 3:If the vehicle 2 has lost authentication at the energy source 3 due to the duration of the control intervention SE and the associated interruption of the charging process UL, a request signal for reauthentication of the vehicle 2 at the energy source 3 is transmitted to the vehicle 2 and / or the energy source 3 in addition to the wake-up signal AS. Thus, a new authentication attempt is initiated at the energy source 3. In particular, it is necessary here for sufficient technical boundary conditions to be present both on the part of the vehicle 2 and on the part of the energy source 3 in order to set up standard communication with authentication information via the charging cable 8, for example according to ISO 15118-20. If the authentication attempt is successful, the energy source 3 can again specify a maximum available charging current I greater than 0 A after completion of the control intervention SE and the vehicle 2 continues the charging process.In a comparable manner, as the fault cases can also occur in combination, it may be necessary to carry out a plurality of the previously described measures for avoiding the fault cases one after the other, in order to continue the charging process of the energy store 1 without faults after termination of the control intervention SE.In a further possible embodiment of the device 5, it is provided that information IN determined by means of the computing unit 6 during the monitoring of the charging process of the energy store 1 is forwarded to at least one application unit 7. Such an application unit 7 is, for example, a terminal of a vehicle user, for example a mobile telephone, which informs the vehicle user about a status of the charging process after receiving the information IN. The application unit 7 can also be a terminal of a network operator or energy supplier, which informs the latter, after receiving the information IN, about a status of the charging process, so that the latter can check whether an external control intervention SE is correctly implemented.List of reference characters1 Energy store 2 Vehicle 3 Energy source 4 Energy network 5 Device 6 Computing unit 7 Application unit 8 Charging cable AS Wake-up signal C Charging EL End of the charging process I Charging current IN Information LK Charging cable not connected LS Charging status MN Mobile radio network Q Query SE Control intervention SOC Charging state ST Start T Transmission t Time UL Interruption of the charging process

Claims

Method for carrying out a charging process of an electrically operated vehicle (2), characterized in that - a charging process of an electrical energy store (1) of the vehicle (2) carried out at an energy source (3) is monitored by means of a vehicle-external arithmetic unit (6) which is coupled or can be coupled to the vehicle (2) by means of data technology, and - in the event of an interruption of the charging process (UL) detected by means of the arithmetic unit (6), a wake-up signal (AS) is transmitted by means of the arithmetic unit (6) to a vehicle data bus system required for carrying out the charging process, and / or - after the charging process has been resumed, after an interruption (UL) thereof or a temporary reduction of a charging current (I) carried out by means of the energy source (3), it is checked by means of the arithmetic unit (6) whether a charging current (I) is limited to a value on the vehicle side, which is less than a maximum charging current (I) which can be made available by the energy source (3), and, if a limitation is present by means of the arithmetic unit (6), the vehicle-side-limited value of the charging current (I) is increased as a function of a time duration remaining until the end of the charging process and / or a target charging state of the energy store (1).Method according to Claim 1, characterized in that a signal for maintaining an active state of the vehicle data bus system is transmitted as the wake-up signal (AS).Method according to Claim 2, characterized in that the signal is transmitted to the vehicle data bus system at regular time intervals.Method according to Claim 1, characterized in that, in the event of a detection, carried out by means of the arithmetic unit (6), of a rest state of the vehicle data bus system resulting from the interruption of the charging process (UL), an activation signal is transmitted to the vehicle data bus system as a wake-up signal (AS).Method according to one of the preceding claims, characterized in that, in the case of a detection, carried out by means of the arithmetic unit (6), of a loss of authentication of the vehicle (2) at the energy source (3) resulting from the interruption of the charging process (UL), a request signal for reauthentication of the vehicle (2) at the energy source (3) is transmitted by means of the arithmetic unit (6) to the vehicle (2) and / or the energy source (3).Method according to one of the preceding claims, characterized in that, in the monitoring of the charging process, - a setpoint charging current and an actual charging current are queried from the vehicle (2) and / or the energy source (3) by means of the computing unit (6), - values of the setpoint charging current and of the actual charging current are transmitted to the computing unit (6) by means of the vehicle (2) and / or the energy source (3), - the values of the setpoint charging current and of the actual charging current are compared by means of the computing unit (6), and - the interruption of the charging process (UL) is detected by means of the computing unit (6) if the actual charging current is zero and / or - the vehicle-side limitation of the charging current (I) is detected by means of the computing unit (6), if the actual charging current is less than the maximum charging current (I) that can be made available by the energy source (3).Method according to one of the preceding claims, characterized in that the data-technology coupling of the vehicle (2) to the computing unit (6) is carried out by means of a mobile radio network (MN).Method according to Claim 7, characterized in that the wake-up signal (AS) is transmitted to the vehicle (2) as a short message by means of a short message service via the mobile radio network (MN).Method according to one of the preceding claims, characterized in that a cloud server or backend server is used as the central processing unit (6).Device (5) for carrying out a charging process of an electrically operated vehicle (2), characterized in that - the vehicle (2) can be coupled or is coupled to a vehicle-external computing unit (6) by data technology and - the computing unit (6) is designed to - monitor a charging process of an electrical energy store (1) of the vehicle (2) carried out at an energy source (3) and - to transmit a wake-up signal (AS) to a vehicle data bus system required for carrying out the charging process in the event of an interruption of the charging process (UL) detected by means of the computing unit (6) and / or - after resuming the charging process after an interruption (UL) thereof or a temporary reduction of a charging current (I) carried out by means of the energy source (3), to check whether a charging current (I) is limited to a value on the vehicle side, which is less than a maximum charging current (I) which can be made available by the energy source (3), and, in the presence of a limit, to increase the vehicle-side-limited value of the charging current (I) as a function of a time duration remaining until the end of the charging process and / or a target state of charge of the energy store (1).

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