DE102021119605A1 - Reserve a charging spot for an electric vehicle - Google Patents

Abstract

A method (S1-S12) is used to reserve a charging space for an electric vehicle and has at least the following steps: (a) Determining initial boundary conditions for a journey with the electric vehicle, including a journey plan, technical charging boundary conditions and user preferences (S1, S2) ; (b) determining a current trip status including at least a current vehicle position, a current planned route and a current remaining range (S5); (c) pre-selection of technically suitable charging locations that can be reserved for the electric vehicle and are within the remaining range of the vehicle along the planned route (S6); (d) determining ideal charging periods at the preselected charging locations (S7); (e) Compiling a list of the charging stations preselected under step (c) in a ranking (S8), taking into account at least one comparison of ideal charging periods determined under step (d) and charging periods that can currently be reserved at the charging stations, as well as an evaluation with regard to user preferences; (f) offering a reservation of at least one charging station from the list (S10) compiled in step (e).

Description

The invention relates to a method for reserving a charging station for an electric vehicle. The invention also relates to a corresponding reservation system, computer program product and computer-readable storage medium.

Infrastructure is usually not designed for a possible maximum requirement. For business reasons, infrastructure operators strive to keep their investments low and the average utilization of the infrastructure high. For this reason, in times of maximum demand, there are e.g. traffic jams on the motorways and waiting times at the ski lift and at the post office, etc. The situation with the charging infrastructure for electric vehicles is likely to be similar in the future. There will be peaks in demand (e.g. at the beginning of the holiday season on the motorways to the holiday areas) when there are not enough charging stations and there will be long waiting times at the charging stations as a result.

The charging infrastructure for electric vehicles cannot currently be reserved using a mature system. As a rule, the "first come - first serve" principle applies, i.e. users line up their vehicles in a queue and usually sit in the car waiting for them to appear at the charging station.

It is the object of the present invention to at least partially overcome the disadvantages of the prior art and, in particular, to provide users of electric vehicles with a possibility of reducing waiting in queues at charging stations or even avoiding them entirely.

This object is solved according to the features of the independent claims. Preferred embodiments can be found in particular in the dependent claims.

1. (a) Bestimmen von Anfangsrandbedingungen für eine Reise mit dem Elektrofahrzeug einschließlich einer Reiseplanung, technischen Lade-Randbedingungen und Nutzerpräferenzen;
2. (b) Bestimmen eines aktuellen Reisestatus einschließlich zumindest einer aktuellen Fahrzeugposition, einer aktuell geplanten Route und einer aktuellen Restreichweite;
3. (c) Vorauswählen von für das Elektrofahrzeug reservierbaren, technisch geeigneten Ladeplätzen, welche innerhalb der Restreichweite des Fahrzeugs entlang der geplanten Route liegen;
4. (d) Bestimmen von „idealen“ Ladezeiträumen an den vorausgewählten Ladeplätzen;
5. (e) Aufstellen einer Liste der unter Schritt (c) vorausgewählten Ladeplätze in einer Rangfolge oder „Ranking“ unter Berücksichtigung zumindest eines Vergleichs von unter Schritt (d) bestimmten idealen Ladezeiträumen und aktuell an den Ladeplätzen reservierbaren Ladezeiträumen sowie einer Bewertung der Ladeplätze im Hinblick auf die Nutzerpräferenzen;
6. (f) Anbieten einer Reservierung zumindest eines Ladeplatzes aus der in Schritt (e) aufgestellten Liste.

The object is achieved by a method for reserving a charging station for an electric vehicle, the method having at least the following steps:

1. (a) determining initial constraints for a journey with the electric vehicle including a journey planning, technical charging constraints and user preferences;
2. (b) determining a current trip status including at least a current vehicle position, a current planned route, and a current remaining range;
3. (c) pre-selection of technically suitable charging places that can be reserved for the electric vehicle and are within the remaining range of the vehicle along the planned route;
4. (d) determining "ideal" charging periods at the preselected charging locations;
5. (e) Compiling a list of the charging points preselected under step (c) in a ranking order, taking into account at least a comparison of ideal charging periods determined under step (d) and charging periods that can currently be reserved at the charging points, as well as an evaluation of the charging points with regard to user preferences;
6. (f) offering a reservation of at least one loading space from the list drawn up in step (e).

This method provides a reservation concept in which a driver of an electric vehicle is only called to a charging station when the associated charging process can be started within a short time or even practically immediately. A waiting time until the charging station can be used is significantly reduced or can even be omitted. The possibility is therefore provided of automatically recommending and reserving to the user the most suitable charging station for his/her trip/journey/route.

The charging station can be a public or private charging station, for example.

The electric vehicle has at least one electrically chargeable energy store (hereinafter referred to as “battery” without restricting the generality). It is a development that the electric vehicle is a partially electrically powered vehicle such as a plug-in hybrid vehicle. It is a development that the electric vehicle is a fully electrically powered vehicle such as a battery-powered vehicle. The vehicle can be a car, truck, bus, motorcycle, etc., for example.

• - voraussichtliche Startzeit der Reise,
• - Startort der Reise,
• - Zielort der Reise,
• - gewünschte späteste Ankunftszeit am Zielort. umfasst.

In one embodiment, the travel planning includes at least one item of information from the group of items of information

• - Estimated start time of the trip,
• - starting point of the trip,
• - destination of the trip,
• - Desired latest arrival time at the destination. includes.

• - technische Einrichtung des Elektrofahrzeugs, z.B. umfassend die Art des Ladesteckers, die Batteriekapazität, die Ladecharakteristik, usw.;
• - verwendete Ladekarte(n)

umfasst.In one embodiment, the technical loading boundary conditions include at least one boundary condition or piece of information from the group of pieces of information

• - technical equipment of the electric vehicle, eg including the type of charging plug, the battery capacity, the charging characteristics, etc.;
• - charge card(s) used

includes.

• - Ladedauer, d.h., die Dauer für einen Ladevorgang;
• - Anfahrtdauer, d.h., die Dauer für die Anfahrt des Ladeplatz und Rückkehr von dem Ladeplatz zu der Route;
• - Kosten des Ladevorgangs, z.B. die Kosten pro KWh;
• - Aufenthaltsqualität am Ladeplatz

umfassen. Beispielsweise kann ein Ladeplatz in idyllischer Umgebung mit angeschlossener hochwertiger Schnellrestauration eine höhere Aufenthaltsqualität aufweisen als ein ansonsten gleichwertiger Ladeplatz in unattraktiver Umgebung ohne Erfrischungsmöglichkeit. Anstelle oder zusätzlich zu der Ladedauer und der Anfahrtdauer können die Nutzerpräferenzen die Umwegdauer, d.h., die Addition der Anfahrtdauer und einer Ladedauer, umfassen.In one embodiment, the user preferences include at least one user preference from the group

• - charging time, ie the duration for one charging process;
• - travel time, ie the time taken to travel to the loading point and return from the loading point to the route;
• - Cost of the charging process, e.g. the cost per KWh;
• - Quality of stay at the loading area

include. For example, a charging station in an idyllic setting with a high-quality fast food restaurant attached can have a higher quality of stay than an otherwise equivalent charging station in an unattractive setting with no refreshment facilities. Instead of or in addition to charging time and travel time, user preferences may include detour time, ie, the addition of travel time and a charging time.

A user can specify or assign an importance value W for these user preferences, which indicates how important this fulfillment of the respective user preference is for a user. The importance value can be specified, for example, on a scale from 1 to 10 or similar, with W=1 representing low importance and W=10 representing high importance for the user. In a possible example, the user preferences with the importance values can be as follows: user preference descriptor importance value NP1 Low cost w1 NP2 Short charging time W2 NP3 Short detour time W3 NP4 High quality of stay W4

Parameter ranges can be assigned to the corresponding importance values, e.g., certain cost bands and/or time bands.

The user can also enter certain limit values, e.g. indicate that he does not want to drive to charging stations where the charging costs exceed a certain kWh amount, the charging time and/or the detour time exceeds a certain limit value or where the quality of stay is too low, etc .

As described above, the importance values W and possibly limit values can be set manually by a user. You can additionally or alternatively by observing the decision-making process automatically adjusted via reserved or used loading slots, e.g. by using fuzzy logic, AI rules, etc.

The initial boundary conditions are advantageously entered before the start of the journey, which makes it possible to reserve at least one loading space in advance of the journey. In principle, however, the procedure can also be started after the start of the journey.

The currently planned route determined or retrieved in step (b) can deviate from the originally planned route, e.g. due to traffic jams, road closures, etc., and can also change in the course of the journey.

• - aktuelle Fahrzeugposition,
• - aktuell geplante Route und
• - aktuelle Restreichweite zumindest eine Information aus der Gruppe der folgenden Informationen umfasst:
• - Ladezustand („State of Charge“, SoC) der Batterie;
• - erwartete Ankunftszeit an den verschiedenen Ladeplätzen;
• - erwartete Ankunftszeit am Zielort der Reise.

It is an embodiment that the current travel status is in addition to the information

• - current vehicle position,
• - currently planned route and
• - current remaining range includes at least one piece of information from the group of the following pieces of information:
• - State of charge (SoC) of the battery;
• - Estimated time of arrival at the various loading points;
• - Estimated time of arrival at the destination of the journey.

• - welche betriebsbereit sind,
• - an denen das Elektrofahrzeug grundsätzlich aufgeladen werden kann, z.B. weil noch Ladefreigaben bzw. Ladeslots verfügbar sind, und/oder
• - an denen Fahrzeug aufgeladen werden darf, z.B. weil der Ladeplatz ein öffentlicher oder allgemein zugänglicher privater Ladeplatz ist und/oder weil für das Fahrzeug eine Nutzungsberechtigung vorliegt.

Charging spaces that can be reserved for the vehicle in step (c) can include, for example, charging spaces

• - which are operational,
• - at which the electric vehicle can generally be charged, e.g. because charging releases or charging slots are still available, and/or
• - where the vehicle may be charged, e.g. because the charging station is a public or generally accessible private charging station and/or because the vehicle is authorized to be used.

For example, loading spaces that are reserved for the day of travel or that are only intended for vehicles from other vehicle manufacturers or other contractual partners could be excluded.

A technically suitable charging station in step (c) is, for example, a charging station that is technically suitable for the vehicle, e.g. with regard to the charging plug, a charging capacity, the possibility of billing the user, etc.

The fact that a charging station is within a remaining range of the vehicle along the planned route can include that it can still be reached by the electric vehicle with a predetermined energy reserve.

An "ideal" charging period for a preselected charging station is understood to mean, in particular, a charging period that should ideally be carried out at this charging station. Among other things, it can be determined when the respective charging process should ideally begin and when it should end.

• - erwartete Ankunftszeit am Ladeplatz;
• - erwarteter Ladezustand („State of Charge“, SOC“) bei Ankunft an dem Ladeplatz;
• - gewünschter Ladezustand nach dem Ladevorgang;
• - Leistungsfähigkeit des fahrzeugseitigen Ladesystems inkl. Batterie. Hierbei kann u.a. die erwartete Batterietemperatur bei Ladestart berücksichtigt werden;
• - Leistungsfähigkeit des Ladeplatzes, z.B. einschließlich einer maximal abrufbaren Ladeleistung;
• - Umwegdauer für den Umweg zum Ladeplatz und/oder weitere Zeitverluste vor und nach dem Ladevorgang wie Wartezeit bis zum Ladevorgang, An- und Abstecken, Zeit für einen Bezahlvorgang, usw.
• - Erwartete Nutzung des Fahrzeuges nach dem Ladevorgang.

In one embodiment, the ideal charging periods are determined on the basis of at least one piece of information from the group of the following pieces of information:

• - Estimated time of arrival at the loading point;
• - expected state of charge (SOC) upon arrival at the charging station;
• - Desired state of charge after charging;
• - Performance of the on-board charging system including the battery. Here, among other things, the expected battery temperature at the start of charging can be taken into account;
• - Capacity of the charging station, e.g. including a maximum charging capacity that can be called up;
• - Detour time for the detour to the charging station and/or other lost time before and after charging, such as waiting time for charging, plugging and unplugging, time for a payment process, etc.
• - Expected use of the vehicle after charging.

The expected arrival time can be determined, for example, from routing/navigation data and traffic data (previous average speed, speed limits, presence of traffic jams or slow-moving traffic, etc.). The duration of the charging process can be calculated from the expected state of charge upon arrival at the charging station; the desired state of charge after the charging process and the performance of the on-board charging system as well as the performance of the charging station.

An end time of the ideal charging period can be estimated from the above information, for example by adding the expected arrival time and the required charging time and, if applicable, further time losses.

The expected state of charge upon arrival at the charging station can be estimated from the current state of charge of the energy store and a probable energy consumption until the charging station is reached. The probable energy consumption can, for example, be estimated from the distance to the charging station, the observed driver behavior or the previous average consumption and traffic data, etc.

The ideal state of charge after charging can correspond to a fully charged battery or a partially charged battery. The ideal state of charge can depend, for example, on the distance to the travel destination, a desired state of charge when the travel destination is reached, etc. For example, fully charging the battery can be advantageous if the travel destination is still far away. Partial charging can be advantageous if the destination is likely to be reached soon. Partial charging can save costs if the electrical energy at the destination is cheaper than at a public (fast) charging station. In addition, the battery can be spared in this way, since full batteries with an SoC of over 80% age more quickly over a long period of time than batteries with a lower SoC.

In step (e), a list of the charging stations is compiled in order of priority, which includes which of the charging stations still remaining after step (c) best meet the charging requirements and user wishes. The list may be referred to as a ranking list, a ranking list, or a hit list.

• - ein Vergleich der in Schritt (d) bestimmten idealen Ladezeiträume der Ladeplätze mit der Dauer der dort reservierbaren Zeitslots;
• - eine Bewertung der Ladeplätze im Hinblick auf die Nutzerpräferenzen;

und ggf. eine Erfüllung weiterer Anforderungen.The ranking list includes at least:

• - A comparison of the ideal charging periods of the charging stations determined in step (d) with the duration of the time slots that can be reserved there;
• - an assessment of the charging stations in terms of user preferences;

and, if applicable, the fulfillment of further requirements.

The ranking list can be created, for example, by calculating an overall score for each of the charging stations from weighted individual evaluations ("individual scores") of the influencing variables in the manner of a scorecard and then listing the charging stations according to their overall score, e.g. in descending order with a smaller overall score.

The individual assessment with regard to the comparison of the ideal charging periods of the charging stations determined in step (d) with the duration of the time slots that can be reserved there can, for example, be carried out in such a way that it is compared what percentage of the ideal charging period can actually be reserved at a charging station. For example, if the period that can actually be reserved is 90% of the ideal period, an individual score S(L) of 90% is awarded.

The individual ratings B of the charging stations with regard to user preferences can, for example, include a rating on a scale between a lowest value and a highest value. An individual assessment B1 of the costs at a specific charging station can be specified as a percentage between the lowest costs (100%) and highest costs (0%) of all charging stations considered. Similarly, a percentage can be specified as individual ratings B2 or B3 for the loading time and the travel time. The individual rating B4 for the quality of stay at the charging station can, for example, be calculated as a percentage from previously submitted user ratings for this charging station, eg "5 stars" = 100%, "3.7 stars" = 72%, etc. From this, the respective individual scores S(NPi) can be calculated as S(NPi) = Wi * Bi, for example.

The individual scores S(L), S(NP1), ..., S(NP4) can then be weighted and combined to form the total score S(total), for example according to the type: single score S(L) S(NP1) = W1 * B1 S(NP2) = W2 * B2 S(NP3) = W3 * B3 S(NP4) = W4 * B4 share factor 60% 10% 10% 10% 10% S(total) Sum {proportional factors * individual scores} where the proportional factors can also assume other values. In particular, the proportional factors can optionally be set in such a way that the maximum individual evaluations or individual scores always result in the same maximum overall score of, for example, "100%" or "10 out of 10" or similar.

It is a further development that at least one of the associated importance values W1 to W4 etc. is varied based on evaluations of user behavior, e.g. because - possibly unconsciously by the user - certain user preferences played a more or less important role in previous reservations than originally set . This variation or adjustment can be made, for example, by fuzzy logic or methods of artificial intelligence.

Offering a reservation of a slot from the list established in step (e) may include offering only the slot with the highest total score. Alternatively, a list of n loading slots with the highest total scores is displayed to choose from. It is a further development that with the charging station, information belonging to the respective charging station, such as the total score, costs for a charging process and/or per kWh, the detour time, the individual evaluations of user preferences, an image, a description of the charging station and connected or in attractions in the vicinity, the operator of the loading station, etc. are displayed, possibly after selecting a loading station for viewing.

In response to step (f), a user can select a specific charging station for reservation, whereupon this reservation is made at the selected charging station.

Steps (b) to (f) can then be repeated several times. In particular, it can be checked continuously during the trip or drive whether an existing reservation can be honored or whether the loading area can be reached in time or not, e.g. because the arrival time at the reserved loading area cannot be met due to a changed traffic situation or unplanned stopovers. If not, the reservation can be canceled automatically, for example. This is advantageous because if a user arrives late or does not arrive at a reserved charging station, the reservation can be subject to a charge.

It is also possible to continuously check whether there is a cheaper charging option (at the same or another charging point) in the meantime than for an existing reservation, e.g. because time slots previously designated as reserved have become free, the travel route has been changed, charging points have become defective, etc. This can change the ranking of the charging stations because the currently reserved charging station no longer offers the best charging option. If this is the case, the driver can be offered a cancellation of the existing reservation and a reservation for the cheaper charging option (rebooking). He can accept the suggestion, modify it (e.g. change the start and end time of the charging process), reject it or replace it with a charging option that is rated less highly.

The task is also solved by a reservation system that is set up to run the present method. The reservation system can be designed analogously to the method and has the same advantages.

• - eine Datenverarbeitungseinrichtung, die zur Durchführung des Verfahrens eingerichtet ist, z.B. programmiert ist. Die Datenverarbeitungseinrichtung kann z.B. in dem Elektrofahrzeug verortet sein, ein Smartphone sein (auf dem z.B. eine entsprechende App installiert ist), in einem Backend verortet sein, z.B. als Netzwerkserver oder Cloudrechner oder an einem Ladeplatz verortet sein;
• - eine Nutzerschnittstelle, über welche der Nutzer Eingaben tätigen kann (z.B. die Wichtung seiner Nutzerpräferenzen und die Auswahl einer Reservierung) und Information ansehen kann (z.B. die Rankingliste). Die Nutzerschnittstelle kann z.B. ein Smartphone oder eine Nutzerschnittstelle des Elektrofahrzeugs oder des Ladeplatzes sein.

It is a further development that the reservation system has:

• - A data processing device that is set up to carry out the method, for example is programmed. The data processing device can be located, for example, in the electric vehicle Be a smartphone (on which, for example, a corresponding app is installed), be located in a backend, for example as a network server or cloud computer or be located at a charging station;
• - a user interface via which the user can make entries (e.g. the weighting of his user preferences and the selection of a reservation) and view information (e.g. the ranking list). The user interface can be a smartphone or a user interface of the electric vehicle or the charging station, for example.

The reservation system can, for example, run entirely in the vehicle, run entirely on a smartphone, start up entirely at a charging station or be distributed, e.g. by running in a data-linked system of vehicle and smartphone or charging station and smartphone.

The object is also achieved by a computer program product, comprising instructions which, when the program is executed by a data processing device, cause the latter to carry out the above method or steps of the above method.

The object is also achieved by a computer-readable storage medium comprising instructions which, when the program is executed by a data processing device, cause the latter to carry out the above method or steps of the above method.

The characteristics, features and advantages of this invention described above, and the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an exemplary embodiment, which will be explained in more detail in connection with the drawings.

1 shows a possible sequence of the reservation procedure.

In a step SO, the method is started by a user of an electric vehicle. In the following, it is assumed that the user would like to carry out a journey or journey in which he can only reach his travel destination with at least one charging of the battery during the journey. The procedure can be started before the start of the journey, e.g. a few days before, or even after the start of the journey. Starting well before the start of the journey has the advantage that there are probably more charging stations that can still be reserved (“time slots”) than shortly before or with the start of the journey.

In a step S1, the user specifies travel boundary conditions such as an expected start time of the trip, the starting point of the trip, the destination of the trip and optionally the desired latest arrival time.

In a step S2, the user enters and/or retrieves general charging conditions, for example a technical design of the vehicle relating to a charging process, such as the performance of the on-board charging system including the battery and the type of charging plug, charging cards used and user preferences regarding, for example, a detour time compared to the planned route for carrying out a charging process, a charging time for a charging process, costs for a charging process, costs for a charging process, a quality of stay at the charging point, etc. The user preferences can be weighted by the user. The user can also enter limit values for this, such as maximum costs per kWh, etc. This information can also be stored in advance, e.g. taken over from a previous procedure.

In step S3 it is queried whether a reservation should be made. If this is not the case ("N"), the method ends in step S4. This can be the case, for example, if a user only wants to change and save the travel and loading conditions.

However, if a reservation is to be made (“Y”), the current travel status is first determined in step S5, including a current vehicle position, the current battery status (SOC), the range of the electric vehicle, the expected time of arrival at a charging station; and the expected time of arrival at the travel destination. The expected arrival time at the loading point and at the destination of the trip can be derived, for example, from route planning. If the journey has not yet started, the information or data entered in step S1 is used where appropriate.

In step S6, those charging stations that meet the necessary requirements along the calculated route are preselected or selected from the charging cards used. The necessary requirements include, for example, that there are still reservation options for the day of travel, under which the desired latest arrival time, if entered, can be adhered to, that the charging stations are technically suitable for charging the electric vehicle (e.g. because they use plugs compatible with the electric vehicle) and that the charging stations are within a remaining range (possibly including a certain energy reserve) of the vehicle along the calculated route.

In step S7, charging periods (the “ideal” charging periods) during which the vehicle should preferably be charged are determined or selected for the charging locations preselected in step S6. In particular, the ideal charging periods can be calculated on the basis of an expected arrival time at the charging station, an optimal target charging status and a necessary charging duration, etc. In this way, an ideal charging period for a specific charging station can advantageously be selected in such a way that the waiting time at the charging station is as short as possible (possibly with a certain safety margin), that it is long enough for the ideal state of charge to be reached after charging, etc. In turn, the ideal state of charge after charging can be selected taking into account the energy consumption to the next destination (final destination of the trip or next charging station), waiting time at the destination, etc.

After step S7, there are therefore ideal charging periods for the preselected charging locations. This does not yet take into account whether these ideal charging periods can actually be reserved exactly as desired.

In step S8, a ranking or a "hit list" of the charging stations is drawn up, which indicates which charging station best meets the charging requirements and requests, in particular by comparing the currently actually reservable charging periods with the ideal charging periods calculated in step S7 and an evaluation of the fulfillment of user preferences as well as the observance of further boundary conditions such as observance of the desired latest arrival time at the destination, etc. A scorecard, for example, can be used to set up the ranking list.

In step S9 it is queried or determined whether a reservation already exists. If this is not the case (“N”), in step S10 the user is offered a reservation of at least one charging station from the list compiled in step S8. If the user makes a reservation, this is then automatically forwarded to the operator of the corresponding charging station. The following branches back to step S5. If the user does not make a reservation, it is possible, for example, to branch back to step S5 after a certain period of time has elapsed (not shown).

If, on the other hand, a reservation ("Y") already exists, in step S11 it is calculated whether the current hit list contains a loading space that represents a better option for loading or whether a better option is available at the same loading space than the previously valid reservation.

If this is the case (“Y”), in step S12 a suggestion is made to the user to rebook the previous reservation to the better option. If the user accepts the suggestion, the existing reservation is automatically canceled and a reservation is made at the charging station associated with the better option. The following branches back to step S5.

If, on the other hand, no better option is available in step S11 ("N"), in step S13 it is checked whether the existing reservation can be kept or whether a late arrival at the reserved loading space is to be expected. If the existing reservation can be maintained (“Y”), the previous reservation remains in place, and the system branches back to step S5. However, if the existing reservation cannot be maintained (“N”), the process branches to step S12.

Even if the user does not accept the suggestion in step S12, the system branches to step S13 (not shown).

Of course, the present invention is not limited to the embodiment shown.

In general, "a", "an" etc. can be understood as a singular or a plural number, in particular in the sense of "at least one" or "one or more" etc., as long as this is not explicitly excluded, e.g. by the expression "exactly a" etc.

A numerical specification can also include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

Claims (14)

Method (S1-S12) for reserving a charging space for an electric vehicle, comprising at least the following steps (a) determining initial constraints for a journey with the electric vehicle including a journey plan, technical charging constraints and user preferences (S1, S2); (b) determining a current travel status including at least a current vehicle position, a current planned route and a current remaining range (S5); (c) pre-selection of technically suitable charging locations that can be reserved for the electric vehicle and are within the remaining range of the vehicle along the planned route (S6); (d) determining ideal charging periods at the preselected charging locations (S7); (e) Compiling a list of the charging locations preselected in step (c) in a ranking (S8), taking into account at least one comparison of ideal charging periods determined in step (d) and charging periods that can currently be reserved at the charging locations, as well as an evaluation with regard to user preferences; (f) offering a reservation of at least one charging station from the list (S10) compiled in step (e). Procedure (S1-S12) according to claim 1 , in which the travel boundary conditions include at least one piece of information from the group of the following information: - estimated start time of the trip; - starting point of the trip; - travel destination; - Desired latest arrival time at the destination. Method (S1-S12) according to one of the preceding claims, in which the technical loading boundary conditions include at least one piece of information from the group of the following pieces of information: - a technical device of the vehicle relating to a charging process; - uses charging cards. Method (S1-S12) according to one of the preceding claims, in which the user preferences include at least one user preference from the group - charging time; - travel time; - cost of charging; - Include quality of stay at the loading area. Method (S1-S12) according to one of the preceding claims, in which importance values can be assigned to the user preferences by a user. Method (S1-S12) according to one of the preceding claims, in which the current travel status additionally includes at least one piece of information from the group of the following pieces of information: - battery condition; - Estimated time of arrival at a loading point; - Estimated time of arrival at the travel destination. Method (S1-S12) according to one of the preceding claims, in which the determination of the ideal charging periods (S7) is carried out on the basis of at least one piece of information from the group of the following pieces of information: - Expected time of arrival at the loading point; - Expected state of charge upon arrival at the charging station; - Desired state of charge after charging; - performance of the on-board charging system; - Capacity of the charging station. Method (S1-S12) according to one of the preceding claims, in which the ranking in step (e) is at least based on - a comparison of the ideal charging periods of the charging stations determined in step (d) with the duration of the time slots that can be reserved there; - an evaluation of the charging stations with regard to user preferences is created (S8). Method (S1-S12) according to one of the preceding claims, in which, if a reservation has been accepted in step (f), this reservation is automatically carried out at the selected loading location (S10). Method (S1-S12) according to one of the preceding claims, in which steps (b) to (f) are repeated several times. Procedure (S1-S12) according to claim 10 , in which it is continuously checked during the journey whether an existing reservation can be kept, and if not, the reservation is automatically canceled (S13). Process (S1-S12) according to one of Claims 10 until 11 , during which it is continuously checked during the journey whether there is a cheaper charging option than for an existing reservation (S11), and if this is the case, an offer is made to cancel the existing reservation and accept a reservation for the cheaper charging option (S12 ). Reservation system which is set up for running the method (S1-S12) according to one of the preceding claims. Computer program product, comprising instructions which, when executed by a data processing device, cause the latter to carry out the method (S1-S12) according to one of the preceding claims.

Images