DE-102024210871-A1 - Method and arrangement for operating a bidirectional charging/unloading process

DE102024210871A1DE 102024210871 A1DE102024210871 A1DE 102024210871A1DE-102024210871-A1

Abstract

The present invention provides a method and an arrangement for operating a bidirectional charging/discharging process between an energy storage device of an electric vehicle and a power grid via a charging/discharging station, wherein the associated charging/discharging power is controlled by the power grid. The method comprises the steps of: making the electric vehicle or a fleet management device available via a cloud and providing at least one efficiency characteristic curve for the bidirectional charging/discharging process stored in the cloud and/or in the electric vehicle; transmitting an offer to carry out the bidirectional charging/discharging process; releasing and carrying out the bidirectional charging/discharging process until a predetermined time and/or a defined state of charge of the energy storage device; or terminating the bidirectional charging/discharging process.

Inventors

Christian Pankiewitz
Jan Bahlo
Gerald Heinrich Oettle
Guido Funcke
Dimitrios STAVRIANOS

Assignees

Robert Bosch Gesellschaft mit beschränkter Haftung

Dates

Publication Date: 20260513
Application Date: 20241113

Claims (12)

Method for operating a bidirectional charging/discharging process between an energy storage device (1) of an electric vehicle (2) and a power grid (3) via a charging/discharging station (4; 4'; 4"), wherein an associated charging/discharging power is controlled by the power grid (3), comprising the steps: Making (S1) the electric vehicle (2) available for the bidirectional charging/discharging process from the electric vehicle (2) or from a fleet management device (100) to the power grid (3) via a cloud (5); Making (S2) at least one efficiency characteristic stored in the cloud (5) and/or in the electric vehicle (2) for the bidirectional charging/discharging process, depending on a charging/discharging power of the energy storage device (1) to the power grid (3) via the cloud (5); Transmitting (S3) an offer for carrying out the bidirectional charging/ Discharge process from the power grid (3) to the electric vehicle (2) or to the fleet management system (100) via the cloud (5); Release (S4) the bidirectional charging/discharging process up to a predetermined time and/or a defined state of charge of the energy storage device (1) from the electric vehicle (2) or from the fleet management system (100) to the power grid (3) via the cloud (5); Execute (S5) the bidirectional charging/discharging process up to the predetermined time and/or the defined state of charge of the energy storage device (1) or until the bidirectional charging/discharging process is aborted (S6) by the electric vehicle (2) or by the power grid (3).
Procedure according to Claim 1 , whereby the offer is independent of how the charging/discharging power is controlled by the power grid (3).
Procedure according to Claim 1 or 2 , wherein the efficiency curve for the bidirectional charging/discharging process takes into account electrical on-board losses in the electrically powered vehicle (2) which occur in front of the charging/discharging station (4; 4';4").
Procedure according to Claim 3 , wherein the efficiency curve for the bidirectional charging/discharging process additionally takes into account off-board electrical losses outside the electrically powered vehicle (2) which occur in or after the charging/discharging station (4; 4';4").
Procedure according to one of the Claims 1 until 4 , whereby the offer includes a loading and/or unloading fee.
Method according to any of the preceding claims, comprising the step of: Requesting a modified offer from the electrically powered vehicle (2) after the offer has been submitted.
Procedure according to one of the Claims 1 until 6 , wherein the electrically powered vehicle (2) is connected via an electrical connection device (6) to an AC or DC capable charging/discharging station (4';4").
Method according to one of the preceding claims, wherein an aging function of the stored efficiency characteristic curve for the bidirectional charging/discharging process is stored in the cloud (5) and/or in the electrically operated vehicle (2).
Method according to one of the preceding claims, wherein changes to the stored efficiency characteristic curve for the bidirectional charging/discharging process are stored in the cloud (5) and/or in the electrically operated vehicle (2).
Arrangement for operating a bidirectional charging/discharging process between an energy storage device (1) of an electrically powered vehicle (2) and a power grid (3) via a charging/discharging station (4; 4';4"), wherein an associated charging/discharging power is controllable by the power grid (3), comprising: a cloud (5) which is communicatively connected to the electrically powered vehicle (2) and the power grid (3) and a storage device (9); a first communication device (7) to make the electrically powered vehicle (2) available for the bidirectional charging/discharging process via the cloud (5); wherein the storage device (9) is provided in the cloud (5) and/or in the electrically powered vehicle (2) to store at least one efficiency characteristic for the bidirectional charging/discharging process as a function of the charging/discharging power of the energy storage device (1) and to make it available to the power grid (3) via the cloud (5); wherein the power grid (3) provides a second a communication device (8) to transmit an offer for carrying out the bidirectional charging/discharging process from the power grid (3) to the electrically powered vehicle (2) or to a fleet management device (100) via the cloud (5); a release device (12) to authorize the bidirectional to release the charging/discharging process up to a predetermined time and/or a defined state of charge of the energy storage device (1) from the electrically powered vehicle (2) or from the fleet management device (100) to the power grid (3) via the first communication device (7) via the cloud (5); wherein the power grid (3) is configured to carry out the released bidirectional charging/discharging process up to the predetermined time and/or the defined state of charge of the energy storage device (1) or until the bidirectional charging/discharging process is aborted by the electrically powered vehicle (2) or by the power grid (3).
order according Claim 10 , wherein the first communication device (7) is arranged in the electrically powered vehicle (2).
order according Claim 10 , wherein the first communication device (7) is arranged in a fleet management device (100).

Description

The present invention relates to a method and an arrangement for operating a bidirectional charging/discharging process. State of the art In the field of bidirectional charging/discharging of electric vehicles, various solutions exist that enable the use of power electronics for energy transfer between the electric vehicle and the power grid. Bidirectional charging allows electric vehicles not only to draw electrical energy from the grid to charge their vehicle batteries (grid-to-vehicle; G2V), but also to feed surplus electrical energy back into the grid (vehicle-to-grid; V2G) to relieve grid congestion during periods of high energy demand. The operating points of the power electronics are primarily optimized for charging the vehicle battery, and deviations from this optimization lead to efficiency losses. Particularly in V2G applications, the power electronics are often operated inefficiently, resulting in energy losses. Since V2G will play a crucial role in stabilizing power grids in the future, these losses need to be minimized. The technology of bidirectional charging/discharging opens up diverse application possibilities, such as the integration of electric vehicles into smart grids, which can contribute to stabilizing power grids and optimizing energy consumption. The DE 10 2022 128 693 A1 This describes a method for bidirectional charging of an electric vehicle by creating an optimized charging plan through the definition of a maximum number of discharge cycles. The system consists of a local energy network, a charging point, and a data processing unit, specifically designed for home networks. The WO 2024/109983 A1 describes a method for bidirectional charging of an electric vehicle, in which discharging during the charging process is only permitted if the discharge revenue exceeds the calculated wear costs for the battery and the charging electronics. The DE 10 2022 133 573 A1 describes a method for bidirectional charging of an electric vehicle's traction battery according to a user-selected charging plan geared towards mobility or flexibility planning, as well as a system for creating such a charging plan. Disclosure of the invention The present invention provides a method for operating a bidirectional charging/discharging process according to claim 1 and an arrangement for operating a bidirectional charging/discharging process according to claim 10. Preferred further training courses are the subject of the subclaims. Advantages of the invention According to the invention, the following are provided: - A method for operating a bidirectional charging/discharging process between an energy storage device of an electrically powered vehicle and a power grid via a charging/discharging station, wherein an associated charging/discharging power is controlled by the power grid, comprising the steps: Providing the electrically powered vehicle for bidirectional charging/discharging from the electrically powered vehicle or a fleet management system to the power grid via a cloud; providing at least one efficiency characteristic curve for bidirectional charging/discharging, stored in the cloud and/or in the electrically powered vehicle, depending on the charging/discharging power of the energy storage system to the power grid via the cloud; submitting an offer for carrying out the bidirectional charging/discharging process from the power grid to the electrically powered vehicle or the fleet management system via the cloud; releasing the bidirectional charging/discharging process up to a predetermined time and/or a defined state of charge of the energy storage system from the electrically powered vehicle or the fleet management system to the power grid via the cloud; Performing the bidirectional charging/discharging process until the predetermined time and/or the defined state of charge of the energy storage device, or until the bidirectional charging/discharging process is terminated by the electrically powered vehicle or by the power grid. - An arrangement for operating a bidirectional charging/discharging process between an energy storage device of an electric vehicle and a power grid via a charging/discharging station, wherein an associated charging/discharging power is controllable by the power grid, comprising: a cloud that is communicatively connected to the electric vehicle, the power grid, and a storage device; a first communication Communication device to make the electrically powered vehicle available for bidirectional charging/discharging via the cloud, wherein the storage device is provided in the cloud and/or in the electrically powered vehicle to store at least one efficiency characteristic for the bidirectional charging/discharging process depending on the charging/discharging power of the energy storage device and to make it available to the power grid via the cloud, wherein the power grid has a second communication device to transmit an offer for carrying out the bidirectional charging/dischargi