Method and system for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources

Abstract

The invention relates to a method for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources. In this method, the amount of energy recharged at a charging station (9) is transmitted from the vehicle (3) to an external evaluation unit (11), which obtains a certificate for the total amount of energy recharged from an environmental company for subsequent greening. In a method that prevents double greening of the recharged energy, public charging point operators (17) located in a predefined territory are stored in a database (13). These operators supply electricity from renewable resources at their charging stations (9), and the total amount of energy recharged is reduced by the amount of energy recharged at the charging stations (9) that provide electricity from renewable resources.

Description

[0001] The invention relates to a method for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources, in which method the amount of energy recharged at a charging station is transmitted from the vehicle to an evaluation device external to the vehicle, which acquires a certificate for the total amount of energy recharged for subsequent greening from an environmental company, as well as a system for carrying out the method.

[0002] DE 11 2020 001 966 T5 describes a rented, battery-powered electric car in which the renter is billed for the amount of energy consumed by the electric car. This takes into account whether the renter has recharged the battery themselves. For this purpose, data is transmitted to one or more specified locations, where a data processing system processes the received data. Along with the amount of energy consumed and recharged, the type of electricity can also be transmitted to the data processing system. An energy management system in the electric car identifies the source of the electricity, allowing an emissions credit to be calculated.

[0003] DE 10 2019 206 773 A1 discloses that the amount of energy charged is recorded from the vehicle's power electronics depending on the charging process. Using a conversion value, a comparison value is then determined, which is transmitted to an external server at the vehicle manufacturer if the vehicle user has consented. The comparison value, which is expressed in cents, for example, is then donated by the vehicle manufacturer to an environmental organization.

[0004] The object of the invention is to provide a method and system for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources, by means of which double "greening" of the recharged amount of energy is prevented or at least largely avoided.

[0005] The invention is based on the features of the independent claims. Advantageous developments and refinements are the subject of the dependent claims. Further features, possible applications, and advantages of the invention will become apparent from the following description and the explanation of exemplary embodiments of the invention illustrated in the figures.

[0006] The problem is solved by the subject matter of patent claim 1 or 6.

[0007] In the method explained above for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources. In this method, the amount of energy recharged at a charging station is transmitted from the vehicle to an external evaluation device, which purchases a certificate for the total amount of energy recharged from an environmental company for subsequent greening. A database stores the public charging point operators in a given territory that supply electricity from renewable resources to their charging stations. The total amount of energy recharged is reduced by the amount of energy recharged at charging stations that provide electricity from renewable resources. This has the advantage of subsequently compensating for the amount of energy generated using energy from renewable resources.By using the database, the operators of charging stations powered by green electricity are identified, making it easy to offset the amount of recharging with electricity from non-renewable resources. This makes it possible to distinguish charging stations powered by non-renewable energy or a mix of renewable and non-renewable energy from those powered solely by electricity from renewable resources. The certificates purchased by vehicle manufacturers, also known as green electricity certificates, which serve to "green" electricity generated from non-renewable resources, now only need to be used for the energy consumed at charging stations that was generated from non-renewable resources. The monetary revenue from the green electricity certificates benefits environmental organizations.

[0008] It is advantageous for public charging point operators that provide electricity from renewable resources at their charging stations to publicly disclose this information for recording in the database. This creates transparency at charging points that offer electricity from renewable resources. This results in a cost advantage for the vehicle manufacturer when greening charging processes at public charging points, i.e., double greening is reduced or avoided for the energy quantities recharged at the charging stations that already originate from renewable resources.

[0009] In one embodiment, public identification is achieved through advertising with electricity from renewable resources and / or information in a charging log, along with the transmission of the recharged energy quantity to the evaluation device. Thus, it only needs to be determined whether they truly offer electricity from renewable resources based on the charging station operators stored in the database.

[0010] In one variant, the evaluation device deducts the amount of recharged energy from the total energy volume when purchasing the certificate the next time a vehicle in a fleet is charged at one of the charging point operators stored in the database. This can be conveniently performed at predefined intervals, particularly for vehicle fleets, thus reducing billing costs.

[0011] In one embodiment, if the vehicle also uses a home charging point operating on a green electricity tariff, this is reported to the evaluation device along with the amount of energy recharged. The amount of energy recharged from the home charging point is not taken into account when calculating the total energy amount. Thus, energy recharged from private charging points can also be taken into account when acquiring certificates for the subsequent "greening" of electricity, which further reduces the vehicle manufacturer's costs.

[0012] A further aspect of the invention relates to a system for determining a total amount of energy charged by a fully electric vehicle, taking into account a proportion of electricity from renewable resources, comprising a plurality of charging stations for recharging an amount of energy by the vehicle, wherein the vehicle is wirelessly connected to an evaluation device external to the vehicle for transmitting the recharged amount of energy, which evaluation device purchases a certificate for the total amount of energy recharged for subsequent greening from an environmental company.In a system by means of which double "greening" of the recharged energy quantity is prevented, the evaluation device is in an operative connection with a database in which existing public charging point operators in a given territory who provide electricity from renewable resources at their charging stations are stored, wherein the evaluation device has a calculation unit that reduces the total recharged energy quantity by the amount of energy that was recharged at charging stations providing electricity from renewable resources.

[0013] Advantageously, the evaluation device is designed as a vehicle backend into which the database is integrated. The vehicle backend is designed to calculate the total energy consumption for a vehicle fleet, reducing the proportion of electricity from renewable resources recharged by the vehicles in the fleet. This allows each vehicle manufacturer to save costs by purchasing green electricity certificates for recharging the electricity mix at charging stations for their entire vehicle fleet and donating them to environmental companies, as double payments for electricity from renewable resources are reliably prevented.

[0014] In another variant, the evaluation device is coupled to a vehicle's home charging point operating on a green electricity tariff. The evaluation device is designed to disregard the amount of energy recharged from the home charging point when calculating the total energy quantity. Taking private home charging points into account further reduces the costs of purchasing green electricity certificates.

[0015] Further advantages, features, and details will become apparent from the following description, in which at least one exemplary embodiment is described in detail—possibly with reference to the drawings. Described and / or illustrated features may form the subject matter of the invention alone or in any meaningful combination, possibly independently of the claims, and may, in particular, also be the subject of one or more separate applications. Identical, similar, and / or functionally equivalent parts are provided with the same reference numerals.

[0016] They show: Fig. 1 an embodiment of the system according to the invention, Fig. 2: an embodiment of the method according to the invention.

[0017] In Fig. 1 shows an exemplary embodiment of the system according to the invention. The system 1 according to the invention consists of at least one fully electrically powered vehicle 3, which is connected to a public charging station 9 for charging its battery 7, which supplies an electric motor 5 with power. The vehicle 3 is connected wirelessly, for example via a mobile phone connection, to an external evaluation device designed as a vehicle backend 11, which may include a calculation unit 19, to which the vehicle 3 sends an amount of energy recharged at the charging station 9 and information about whether or not the charging station 9 is providing power from renewable resources.

[0018] A database 13 is integrated into the vehicle backend 11, which stores all public charging stations 9 that provide electricity from renewable resources in a given territory, for example, Germany. In addition to public charging stations 9, private home charging points 15 can also be recorded if they are operated with a "green electricity tariff" or powered by a private photovoltaic system. The "green electricity tariff" is understood to mean an electricity tariff for renewable energies.

[0019] Whether a public charging point provides electricity from renewable or non-renewable resources is the responsibility of the charging point operator 17 or the energy supplier. If the charging point operator 17 provides electricity from renewable resources at all of its charging stations 9, it can make this public, for example, by advertising or otherwise making this known to the public. Another option for making this known is additional information, which is added to the charging protocol (communication between vehicle 3 and charging station 9) and forwarded via vehicle 3 to the database 13 of the vehicle backend 11 and stored there. Any information provided otherwise regarding the supply of electricity from renewable resources by a charging point operator is preferably entered manually into the database 13.

[0020] An embodiment of the method according to the invention is shown in Fig.2. In block 100, a vehicle manufacturer provides a telematics service for registering recharged energy quantities generated from renewable resources. A vehicle owner or vehicle user registers their vehicle 3 with this telematics service according to block 110. An app is then provided to the vehicle owner or user (block 120) which can communicate with the vehicle backend 11 and, after each battery recharging process, sends information to the vehicle backend 11 about the recharged energy quantity and whether the recharged energy was generated from renewable resources (block 130). However, the information about the recharged energy quantity can also be transmitted from the vehicle 3 itself to the backend 11.In block 140, the vehicle backend 11 creates, for example, a monthly report on the amount of energy recharged by all vehicles 3 of the vehicle manufacturer using the telematics service, and which vehicles 3 can form a vehicle fleet. In block 150, a check is made to determine whether the charging point operator 17 at which the amount of energy of a vehicle 3 was recharged is included in the database 13, which stores charging point operators 17 that provide electricity 100% from renewable resources.

[0021] The energy quantities determined during charging processes using electricity from non-renewable resources are aggregated for all of the vehicle manufacturer's vehicles 3 over a specified period and subsequently offset in block 160. The vehicle manufacturer purchases green electricity certificates, such as guarantees of origin for the electricity, which verifiably certify the origin of the electricity. The guarantee of origin is currently the only legally valid proof that the recharged energy was generated 100% sustainably. If an energy supplier supplies electricity from renewable energy sources, it must invalidate these guarantees of origin. Such a guarantee of origin can only be invalidated once.

[0022] The described solution ensures that a reliable distinction can be made between energy generated from renewable resources and energy generated from non-renewable resources. This creates appropriate transparency for charging point operators 17 who provide electricity from renewable resources. This enables cost savings in the "greening" of energy generated from non-renewable resources and ensures that vehicle 3 is completely CO2-neutral or CO2 offset during its usage phase. List of reference symbols 1 system 3 vehicles 5 Electric motor 7 Battery 9 public charging stations 11 Vehicle backend 13 Database 15 home charging points 17 charging point operators 19 Calculation unit QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 11 2020 001 966 T5

[0002] DE 10 2019 206 773 A1

[0003]

Claims

[1] Method for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources, in which the amount of energy recharged at a charging station (9) is transmitted from the vehicle (3) to an evaluation device (11) external to the vehicle, which acquires a certificate for the total amount of energy recharged for subsequent greening from an environmental company, characterized by that public charging point operators (17) present in a given territory, which provide electricity from renewable resources at their charging stations (9), are stored in a database (13), wherein the total amount of energy recharged is reduced by the amount of energy which was charged at the charging stations (9) providing electricity from renewable resources. [2] Method according to claim 1, characterized bythat the public charging point operator (17) who provides electricity from renewable resources at its charging stations (9) makes this publicly known for recording in the database (13). [3] Method according to claim 2, characterized by that the public identification is carried out by advertising electricity from renewable resources and / or the information is transmitted to the evaluation device (11) in a charging protocol together with the amount of energy recharged. [4] Method according to claim 1, 2 or 3. characterized by that the evaluation device (11) deducts the amount of energy recharged with electricity from renewable resources from the total amount of energy when acquiring the certificates for the next charging process of each vehicle (3) of a vehicle fleet from one of the charging point operators (17) stored in the database (13). [5] Method according to at least one of the preceding claims, characterized bythat in the case of additional use of a home charging point (15) operated with a green electricity tariff by the vehicle (3), this is communicated to the evaluation device (11) together with the amount of energy recharged, wherein the amount of energy recharged from the home charging point (15) is not taken into account when forming the total amount of energy. [6] System for determining the total amount of energy charged by a fully electric vehicle, taking into account a share of electricity from renewable resources, comprising a plurality of charging stations (9) for recharging an amount of energy by the vehicle (3), wherein the vehicle (3) is wirelessly connected to an evaluation device (11) external to the vehicle for transmitting the recharged amount of energy, which acquires a certificate for the total amount of energy recharged for subsequent greening from an environmental company, characterized bythat the evaluation device (11) is in an operative connection with a database (13) in which public charging point operators (17) present in a predetermined territory are stored, which operators supply electricity from renewable resources to their charging stations (9), wherein the evaluation device (11) has a calculation unit (19) which reduces the total amount of energy recharged by the amount of energy which was recharged at the charging stations (9) providing electricity from renewable resources. [7] System according to claim 6, characterized by in that the evaluation device is designed as a vehicle backend (11) into which the database (13) is integrated, wherein the vehicle backend (11) is designed to create the total amount of energy for a vehicle fleet, which is to be reduced by the proportion of electricity from renewable resources which was recharged by the vehicles (3) of the vehicle fleet. [8] System according to claim 6 or 7, characterized by that the evaluation device (11) is coupled to a home charging point (15) of a vehicle (3) operated with a green electricity tariff, wherein the evaluation device (11) is designed to disregard the amount of energy recharged from the home charging point (15) when forming the total amount of energy.

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