Charging arrangement and method for determining a connection position between a charging contact and a charging connection

Abstract

The invention relates to a charging arrangement (1), comprising an electric vehicle (2) which has a charging connection (5) electrically connected to an energy store (6) of the electric vehicle (2), and a charging station (4) for automatically charging the energy store (6), which charging station has a charging contact (7) which can be brought into contact with the vehicle-side charging connection (5), and a positioning unit (9), wherein the positioning unit (9) is designed to determine a connection position of the charging connection (5) and to orient the charging contact (7) to the charging connection (5) on the basis of the connection position, wherein, in order to determine the connection position, the charging connection (5) defines at least two reference straight lines (104), (105) which can be determined by the positioning unit (9) and via which a theoretical centre point (107) of the charging connection (5) can be ascertained.

Description

[0001] Charging arrangement and method for determining a connection position between a charging contact and a charging connection

[0002] The invention relates to a charging arrangement for charging an energy storage device of an electric vehicle having the features of the preamble of claim 1. Furthermore, the invention relates to a method for determining a connection position between a charging contact and a charging connection of the charging arrangement.

[0003] Various state-of-the-art systems for charging electric vehicles are known, such as WEVC (Wireless Electric Vehicle Charging), ACDS (Automatic Connecting Device for Conventional Side Connecting Interface), or ACDU (Automatic Connecting Underbody Device). Underbody systems such as ACDUs use additional hardware in the vehicle and on the floor to establish a conductive connection on the underside of the vehicle for charging. For example, a relative position between the connectors on the vehicle and on the floor can be determined to establish the conductive connection.

[0004] The document WO 2022 000 006 A1 discloses a method for interaction, in particular for energy exchange, between a first device, such as a charging device, and a second device, such as an electric vehicle, wherein the first device has a first module with a first interaction element and the second device has a second module with a second interaction element. After the devices have assumed an interaction position for coarse positioning of the interaction elements, the interaction elements are moved relative to one another, in particular brought closer to one another, for fine positioning of the interaction elements in order to interact with one another. To control the fine positioning, a relative position between the interaction elements is determined using a positioning system. The object of the present invention is to propose a charging arrangement which enables a connection position to be detected in a simple manner.Furthermore, it is an object of the invention to propose a corresponding method.

[0005] This object is achieved by a charging arrangement having the features of claim 1 and a method having the features of claim 9. Preferred or advantageous embodiments of the invention emerge from the subclaims, the following description and the attached figures.

[0006] The subject matter of the invention is a charging arrangement with an electric vehicle and with a charging station which is designed and / or suitable for the automated charging of an energy storage device of the electric vehicle. An electric vehicle can be understood to mean both a battery-electric electric vehicle (BEV) and a hybrid electric vehicle (HEV). The energy storage device is preferably designed as a traction battery of the electric vehicle. The charging station can be designed as an automatically connecting charging station, also referred to as an automatic connection device (ACD). The charging station can establish an electrical connection from a side of the vehicle, also referred to as an automatic connecting device for a conventional side connecting interface (ACDS), or from an underbody, also referred to as an automatic connecting underbody device (ACDU). The charging station can be permanently connected to an energy source or a power source.Alternatively, the charging station can also be equipped with an energy storage device, such as a battery module. The charging station is preferably designed as a fixed or stationary or mobile charging station.

[0007] The electric vehicle has a charging port that is electrically connected to the energy storage device of the electric vehicle. In principle, the charging port can be designed as a conventional charging port in the front or rear area, in particular in the area of ​​the rear lighting, or in the area of ​​the rear or front wheels. However, the charging port is preferably designed as an underbody charging port that is arranged on an underside of the electric vehicle. The charging station has a charging contact that can be contacted with the vehicle-side charging port. In particular, an electrical connection can be established between the charging contact and the charging port, via which connection a charging process of the energy storage device can be carried out. Preferably, the charging contact and the charging port can be conductively contacted with one another, preferably via a plug connection. For this purpose, the charging contact preferably comprises a charging plug and the charging port a charging socket.Particularly preferably, the charging plug and charging socket are circular.

[0008] Furthermore, the charging station has a positioning unit which is designed to determine a connection position of the charging connection and to align the charging contact with the charging connection based on the connection position. In particular, the positioning unit enables the position of the charging contact to be adjusted to the connection position of the charging connection while the vehicle is stationary. The connection position can be understood to be a position of the charging connection into which the charging contact must be transferred in order to connect it to the charging connection. Preferably, the positioning unit is designed to move the charging contact relative to the charging connection in order to form or break the electrical connection between the charging contact and the charging connection. When arranged in the correct position, the charging contact is preferably aligned congruently and / or coaxially with the charging connection.

[0009] Within the scope of the invention, it is proposed that the charging connection defines at least or exactly two reference lines, which can be determined by the positioning unit, for determining the connection position and via which a theoretical center point of the charging connection can be determined. The reference lines are preferably used for the fine positioning of the charging contact. In particular, the positioning unit is configured to determine the reference lines by scanning the charging connection based on scanning points. The reference lines preferably lie in a common plane of a reference coordinate system, preferably an xy plane. Particularly preferably, the positioning unit is designed to display the reference lines in a sensor image. A theoretical center point of the charging connection can be understood, for example, as a geometric center point of the charging connection, preferably of the charging socket.The reference lines can, for example, be lines oriented parallel to a direction of movement and / or scanning direction of the charging contact. The reference lines are preferably arranged and / or aligned in such a way that exactly one center point can always be clearly determined.

[0010] The advantage of the invention is that by defining reference lines at the charging port, a vehicle-mounted sensor or transmitter for determining the port position is eliminated. Thus, a positioning unit is proposed that makes it possible to locate the vehicle's charging port with fewer or no sensors on the vehicle. This allows for the creation of a charging arrangement that is particularly simple and cost-effective.

[0011] In a specific implementation, the theoretical center point is defined by an intersection point of at least two reference lines. Specifically, exactly two reference lines are defined through the charging port, which intersect at exactly one point, which simultaneously forms the theoretical center point. Thus, a charging port is proposed that has a minimal number of reference lines and enables very simple position determination.

[0012] In an alternative implementation, the theoretical center point is defined starting from an intersection point of the at least two reference lines and a specified distance along one of the reference lines. In particular, at least or exactly two reference lines are defined through the charging connection, which intersect at exactly one intersection point that is arranged at a distance from the theoretical center point. The theoretical center point can either lie on one of the two reference lines or on another reference or auxiliary line running through the intersection point. A charging connection is thus proposed which can be implemented with a simpler design. In addition, the additional reference line can improve the accuracy when determining the connection position, since any measurement inaccuracies caused by many sampling points can be averaged out.

[0013] In a specific implementation, it is provided that the underbody charging connection has a reference geometry defining the reference lines, and the positioning unit has a sensor device that detects the reference geometry. In particular, the reference lines can be determined by scanning the reference geometry, preferably by at least two scanning points each. In particular, the sensor device is configured to scan the reference geometry optically and / or acoustically and / or inductively and / or capacitively and / or magnetically. The reference geometry can be represented by an image of the reference geometry, e.g., an image recording, and / or by several, preferably a multitude of scanning points, in the sensor image. In principle, the reference lines can be defined by exactly two scanning points each, wherein the scanning points lie on the reference line.Alternatively, the reference lines can also be defined by more than two sampling points, with the sampling points either lying on the reference line or spaced apart from it. With a spaced arrangement of the sampling points, the reference line can be drawn between the sampling points at a fixed, uniform distance from the sampling points. By providing the reference geometry at the charging port, this can be implemented particularly simply and cost-effectively.

[0014] In one specific embodiment, the reference geometry is formed by at least or exactly two optically detectable reference contours. The reference contours can be formed by profiles and / or embossings that can be detected by means of a distance measurement. For example, the sensor device can comprise one or more laser, lidar, or camera sensors to optically detect the reference contours. Preferably, the reference contours are pronounced or offset from the charging port in such a way that they can be clearly detected as the reference contours by the sensor device. In particular, the charging contact and the sensor device can be accommodated in a common housing. The sensor device preferably has a plurality of optical sensors that are arranged on a common partial circle around the charging contact.A charging connection is thus proposed which allows a simple definition of the reference line by means of a geometric embossing.

[0015] In an alternative or additional embodiment, the reference geometry is formed by at least two magnetically detectable reference magnets. The reference magnets can be designed as permanent magnets, preferably bar magnets, which can be detected by means of a magnetic field measurement. For example, the sensor device can comprise one or more Hall sensors to magnetically detect the reference magnets. In particular, the charging contact and the sensor device can be housed in a common housing. Thus, a charging connection is proposed which enables the definition of the reference line in a simple manner through the integration of magnets.

[0016] In a further development, it is provided that the reference geometry is defined with respect to a reference coordinate system by two longitudinal straight line sections extending in a y-direction and at least one transverse straight line section extending in an x-direction. In particular, the reference coordinate system is defined by a vehicle coordinate system, wherein the y-direction corresponds to a vehicle longitudinal direction and the x-direction corresponds to a vehicle transverse direction. The longitudinal straight line sections are preferably designed as two parallel and / or equally long straight line sections, which delimit and / or frame the charging port in the x-direction or vehicle transverse direction. The transverse straight line section is preferably designed as a straight line section connecting the two longitudinal straight line sections, which delimits and / or frames the charging port in the y-direction or vehicle longitudinal direction.

[0017] According to this development, a first reference line is arranged centrally between the two longitudinal line sections and a second reference line lies on the transverse line section, wherein the theoretical center point is arranged on the first reference line at a distance from an intersection point of the first and second reference lines. In particular, the first reference line is arranged parallel to the two longitudinal line sections and / or perpendicular to the second reference line. Preferably, the intersection point lies on the transverse line section and the center point between the two longitudinal line sections lies within the delimited area. To identify the reference line, at least six sampling points must be recorded, whereby at least two sampling points must lie on each of the straight line sections. A reference geometry is thus proposed which is characterized by high measurement accuracy.

[0018] In an alternative development, the reference geometry is defined with respect to the reference coordinate system by two straight line segments arranged at an angle to one another in the y-direction. The straight line segments are preferably arranged at an angle of at least or exactly 90 degrees to one another, preferably less than 70 degrees, in particular less than 50 degrees, with an angle bisector being directed axially parallel to the y-axis or to the vehicle's longitudinal axis. The two straight line segments are preferably directed in the direction of the charging port and / or are oriented convergently. In simplified terms, the two straight line segments are arranged in a V-shape. It is preferably provided that the two straight line segments are spaced apart from one another and / or are not connected to one another.

[0019] According to this refinement, a first reference line lies on one straight line segment and a second reference line lies on the other straight line segment, with the theoretical center being formed by the intersection of the two reference lines. In simplified terms, the two straight lines point toward the charging port. To identify the reference lines, at least four sampling points must be acquired, with at least two sampling points each lying on one of the straight lines. Thus, a reference geometry is proposed that is characterized by a particularly simple reference geometry and can be acquired in a short time.

[0020] In an alternative development, the reference geometry is defined with respect to the reference coordinate system by two straight line sections arranged at an angle to one another in the y-direction and a longitudinal line section extending centrally between the two straight line sections in the y-direction. The straight line sections are preferably arranged at an angle of at least or exactly 90 degrees to one another, preferably less than 70 degrees, in particular less than 50 degrees, with the longitudinal line section lying on an angle bisector. Preferably, the two straight line sections and the longitudinal line section are directed in the direction of the charging connection. In simplified terms, the straight line sections are arranged in a Y-shape. It is preferably provided that the two straight line sections and the longitudinal line section are spaced from one another and / or are not connected to one another. In particular, the charging connection is arranged in the x-direction orlimited in the transverse direction of the vehicle by the two straight sections.

[0021] According to this development, a first reference line lies on one straight line segment, a second reference line on the other straight line segment, and a third reference line on the longitudinal straight line segment, wherein the theoretical center point is arranged on the third reference line at a distance from an intersection point of the first and second reference lines. In particular, the third reference line forms the angle bisector of the first and second reference lines. Preferably, the intersection point lies on the third reference line and / or the longitudinal straight line segment, and the center point between the two straight lines lies within the delimited area. In simplified terms, the two straight lines and the longitudinal straight line segment point toward the charging port.To identify the reference line, at least six sampling points must be acquired, with at least two sampling points each located on one of the line segments. Thus, a reference geometry characterized by high measurement accuracy is proposed.

[0022] Another subject matter of the invention relates to a method for determining the connection position between the charging contact and the underbody charging connection of the charging arrangement, as already described above. Within the scope of the method, at least or exactly two reference lines of the charging connection are determined; based on the reference lines, a theoretical center point is determined as the connection position of the underbody charging connection, and the charging contact is aligned to the theoretical center point. In particular, the reference lines are determined by scanning a reference geometry and displayed in a sensor image with reference to a reference coordinate system. Particularly preferably, the reference geometry can be displayed by detecting a plurality of scanning points in the sensor image. The reference lines can then be displayed and / or determined based on the scanning points and / or the reference geometry in the sensor image.The theoretical center point can then be determined relative to an intersection point of the reference lines. The center point can be determined or determined by the intersection point itself or a defined distance from the intersection point. Based on the theoretical center point, a control signal can be generated, and the charging contact can be aligned to the center point based on the control signal.

[0023] In a specific implementation, a reference run is carried out to determine the reference line. During the reference run, the reference geometry of the charging port is scanned, and for each reference line, at least two sampling points of the reference geometry are recorded. For this purpose, the sensor device is moved within a connection area of ​​the charging port that allows sufficient sampling points to be measured to find the reference line. For example, the sensor device is moved alternately in the y-direction and x-direction over the connection area until sufficient sampling points are available. A reference run may be necessary, in particular, for simple laser sensors that can only measure one point. This means that the charging arrangement can also be equipped with cost-effective sensors.

[0024] Further features, advantages, and effects of the invention will become apparent from the following description of preferred embodiments of the invention. It shows:

[0025] Fig. 1 is a schematic representation of a charging arrangement as an embodiment of the invention;

[0026] Fig. 2 a concrete implementation of the loading arrangement in a perspective view from below;

[0027] Fig. 3 is a schematic representation of a sensor image of the loading arrangement according to Fig. 2;

[0028] Fig. 4 shows an alternative embodiment of the sensor image in the same representation as shown in Fig. 3;

[0029] Fig. 5 shows a further alternative embodiment of the sensor image in the same representation as shown in Fig. 3;

[0030] Fig. 6 shows the loading arrangement according to Fig. 2 in a view from below with a possible scanning path during a scanning run.

[0031] Figure 1 shows a highly schematic side view of a charging arrangement 1. The charging arrangement 1 comprises an electric vehicle 2, which is arranged or parked on a floor surface 3. Furthermore, the charging arrangement 1 has a charging station 4, which is arranged below the electric vehicle 2 and at least partially recessed into the floor surface 3. For example, the charging station 4 is an underbody charging station, also known as an ACDU (Automatic Connecting Underbody Device).

[0032] The electric vehicle 2 has a charging port 5 located on the underbody, which is electrically connected to an energy storage device 6, for example, a traction battery, of the electric vehicle 2. The charging station 4 has a charging contact 7, which can be electrically contacted with the charging port 5 in order to supply the energy storage device 6 with electrical energy. For this purpose, the charging station 4 is connected to an energy source 8, which supplies the charging contact 7 with electrical energy. For this purpose, the charging contact 7 can comprise a charging plug, and the charging port 5 can comprise a charging socket, which are connected to one another via a plug connection.

[0033] To position the charging contact 7 correctly relative to the charging port 5, the charging station 4 has a positioning unit 9, which essentially comprises a sensor device 10, a control device 11, and an actuating device 12. The sensor device 10 is designed to detect a connection position of the charging port 5, wherein the control device 11 is designed to control the actuating device 12 based on the connection position in order to align the charging contact 7 with the connection position. The actuating device 12 can be a combination of a rotary and linear drive or a robot arm. In the connection position, the charging contact 7 is correctly aligned with the charging port, preferably coaxially with respect to a central axis 100. The charging contact 7 can then be extended toward the charging port 5 or in the axial direction relative to the central axis 100 to establish a plug-in connection with the charging port 5.

[0034] Figure 2 shows the charging port 5 and the charging contact 7 with the sensor device 10 in a perspective view. The sensor device 10 is integrated into the charging contact 7, preferably a housing. The charging port 5 has a reference geometry 13 that can be detected by the sensor device 10 to determine the connection position 5. In the exemplary embodiment shown, the reference geometry 13 is formed by a reference contour 14 that borders or surrounds the charging port 5 and is formed by a defined geometric profile or embossing. The reference contour 14 can be offset or highlighted relative to the charging port 5. The reference contour 14 can be detected, for example, by means of a distance measurement by the sensor device 10, wherein the sensor device 10 comprises a plurality of sensors 20 for this purpose.The sensors 20 can be configured, for example, for laser, lidar, or photogrammetry measurements in order to capture the reference contour 14 with sufficient accuracy. The number of sensors 20 depends on the sensor type and the time available for the measurement. For example, the sensors 20 are arranged on a common pitch circle and / or concentrically around the charging contact 7.

[0035] Alternatively or optionally in addition, the reference geometry 13 can be formed by one or more reference magnets 15 bordering or surrounding the charging port 5, which can be formed by one or more permanent magnets integrated in the region of the reference contour 14. The reference magnets 15 can be detected, for example, by means of a magnetic field measurement by the sensor device 10, wherein the sensor device 10 comprises one or more sensors 20 for this purpose, which are designed, for example, as Hall sensors.

[0036] In the exemplary embodiment shown, the reference geometry 13 is formed by two longitudinal straight line sections 16 extending in the vehicle's longitudinal direction 101 and a transverse straight line section 17 extending in the vehicle's transverse direction 102. Thus, the charging port 5 is delimited in the vehicle's transverse direction 102 by the two longitudinal straight line sections 16 and in the vehicle's longitudinal direction 101 by the transverse straight line section 17.

[0037] Figure 3 shows a two-dimensional sensor image 18, which is generated by scanning the reference geometry 13 using the sensor device 10. For example, the control device 11 can be equipped with a corresponding hardware or software module that can generate the sensor image 18 based on the sensor data.

[0038] In the sensor image 18, the two longitudinal straight line sections 16 and the transverse straight line section 17 are shown in an x-y plane with respect to a reference coordinate system 103, wherein one y-direction corresponds to the vehicle's longitudinal direction 101 and one x-direction corresponds to the vehicle's transverse direction 102. The arrangement of the longitudinal and transverse straight line sections 16, 17 allows at least two reference lines 104, 105 to be determined, which are entered into the sensor image 18 to determine the connection position of the charging port 5. If at least two reference lines 104, 105 are present, each point in the xy plane can be determined using coordinate knowledge. The position and orientation of the reference lines 104, 105 are selected such that they can be used to find a theoretical center point 107 of the charging port 5 in the xy plane, which corresponds to the connection position of the charging port 5.

[0039] In this exemplary embodiment, the first reference line 104 can be determined from the two longitudinal line sections 16, which run parallel to the y-axis. For this purpose, the first reference line 104 is arranged centrally between the two longitudinal line sections 17 and aligned parallel to the y-axis. The second reference line 105 can be determined from the transverse line section 17, which runs parallel to the x-axis. For this purpose, the second reference line 105 lies on the transverse line section 17 and is aligned parallel to the x-axis. The two reference lines 104, 105 intersect at an intersection point 108, with the theoretical center point 107, starting from the intersection point 108, lying on the first reference line 104 at a distance 109 from the intersection point 108.In order to align the charging contact 7 to the center point 107 and thus to the connection position, a distance of zero to the first reference line 104 and the distance 109 to the second reference line 105 are required. Based on the sensor image 18, the control device 11 can control the actuating device 12 to move the charging contact 5 into the connection position. Figure 4 shows an alternative sensor image 18, which is based on an alternative embodiment of the reference geometry 13. The reference geometry 13 has two straight line segments 19 arranged at an angle to one another with respect to the y-axis. For example, the straight line segments 19 are arranged at an angle 110 of approximately 90 degrees to one another, with an angle bisector running parallel to the y-axis or to the vehicle longitudinal direction 101. The first reference line 104 can be determined by one straight line segment 19 and the second reference line 105 by the other straight line segment 19.For this purpose, the first reference line 104 lies on one line segment 19 and the other reference line 105 lies on the other line segment 20. The two reference lines 104, 105 intersect at an intersection point 108, which simultaneously forms the theoretical center point 107. In order to align the charging contact 7 to the center point 107 and thus to the connection position, a distance of zero to the two reference lines 104, 105 is required.

[0040] Figure 5 shows another alternative sensor image 18, which is based on another alternative embodiment of the reference geometry 13. In addition to the two straight line segments 19 arranged at an angle to one another with respect to the y-axis, as shown in Figure 3, the reference geometry 13 also has a longitudinal line segment 16 that extends parallel to the y-axis or in the vehicle's longitudinal direction 101. The first reference line 104 can be determined by one straight line segment 19, and the second reference line 105 by the other straight line segment 19. In addition, a third reference line 106 can be defined by the longitudinal line segment 16, which runs parallel to the y-axis. For this purpose, the first reference line 104 lies on one straight line segment 19, the other reference line 105 lies on the other straight line segment 20, and the third reference line 106 lies on the longitudinal line segment 16.In other words, the third reference line 106 forms the bisector of the angle 110 formed between the first and second reference lines 104, 105. The three reference lines 104, 105, 106 intersect at a common intersection point 108, with the theoretical center point 107, starting from the intersection point 108, lying on the third reference line 106 at a distance 109 from the intersection point 108. In order to align the charging contact 7 to the center point 107 and thus to the connection position, a distance of 0 to the third reference line 106 and the distance 109 to the first and second reference lines 104, 105 and to the intersection point 108 are required.

[0041] Thus, a positioning unit 9 is proposed that can locate the charging port 5 without a vehicle-mounted sensor arrangement. Numerous design variants for the reference geometry 13 are conceivable. In general, the more and longer the straight sections 16, 17, 19, the more accurate the positioning will be. This is because any measurement inaccuracies can be averaged over many measuring points.

[0042] Figure 6 shows the charging port 5 and the charging contact 7 with the sensor device 10 in an axial plan view. In an embodiment of the sensors 20 that can only measure one point, such as simple laser sensors, a reference run is performed in which the sensor device 10 is moved over a receiving area 21 of the charging port 5 along a scanning path 111 in order to detect at least two scanning points 22 per reference line 104, 105 or per reference contour 14 or reference magnet 15. In the exemplary embodiment shown, the charging contact 5, together with the sensor device 10, is moved alternately in the vehicle transverse direction 102 and in the vehicle longitudinal direction 101 over the receiving area 21 in order to detect at least two scanning points 22 for the two longitudinal straight line sections 16 and the transverse straight line section 17.Thus, a sufficient number of sampling points 22 are found to represent the reference geometry 13 according to Figure 3 in the sensor image 18 and to determine the reference lines 104, 105 based thereon. List of reference symbols.

[0043] Charging arrangement Electric vehicle Floor area Charging station Charging connection Energy storage Charging contact Energy source

[0044] Positioning unit

[0045] Sensor device Control device Actuating device Reference geometry Reference contour Reference magnet

[0046] Longitudinal straight section Transverse straight section Sensor image

[0047] Straight section sensors

[0048] Recording area

[0049] Scanning points center axis

[0050] Vehicle longitudinal direction Vehicle transverse direction Reference coordinate system First reference line Second reference line Third reference line Center point Intersection Distance Angle Scanning path

Claims

Patent claims 1. Loading arrangement (1 ), - with an electric vehicle (2) which has a charging connection (5) electrically connected to an energy storage device (6) of the electric vehicle (2), - with a charging station (4) for the automated charging of the energy storage device (6), which has a charging contact (7) that can be contacted with the vehicle-side charging connection (5) and a positioning unit (9), wherein the positioning unit (9) is designed to determine a connection position of the charging connection (5) and to align the charging contact (7) with the charging connection (5) based on the connection position, characterized in that the charging connection (5) defines at least two reference lines (104, 105) that can be determined by the positioning unit (9) for determining the connection position, via which reference lines a theoretical center point (107) of the charging connection (5) can be determined.

2. Charging arrangement (1) according to claim 1, characterized in that the theoretical center point (107) is defined by an intersection point (108) of the at least two reference lines (104, 105).

3. Loading arrangement (1) according to claim 1, characterized in that the theoretical center point (107) is defined starting from an intersection point (108) of the at least two reference lines (104, 105) by a fixed distance (109) along one of the reference lines (104, 105).

4. Charging arrangement (1) according to one of the preceding claims, characterized in that the charging connection (5) has a reference geometry (13) defining the reference lines (104, 105) and the positioning unit (9) has a sensor device (10) detecting the reference geometry (13).

5. Charging arrangement (1) according to claim 4, characterized in that the reference geometry (13) is formed by at least two optically detectable reference contours (14) and / or at least two magnetically detectable reference magnets (15).

6. Loading arrangement (1) according to claim 4 or 5, characterized in that the reference geometry (13) is defined with respect to a reference coordinate system (103) by two longitudinal straight line sections (16) extending in a y-direction and at least one transverse straight line section (17) extending in an x-direction, wherein a first reference straight line (104) is arranged centrally between the two longitudinal straight line sections (16) and a second reference straight line (105) lies on the transverse straight line section (17), wherein the theoretical center point (107) is arranged on the first reference straight line (104) at a distance (109) from an intersection point (108) of the first and second reference straight lines (104, 105).

7. Loading arrangement (1) according to claim 4 or 5, characterized in that the reference geometry (13) is defined with respect to a reference coordinate system (103) by two straight line sections (19) arranged at an angle to one another in a y-direction, wherein a first reference line (104) lies on one straight line section (19) and a second reference line (105) lies on the other straight line section (19), wherein the theoretical center point (107) is arranged at an intersection point (108) of the two reference lines (104, 105).

8. Loading arrangement (1) according to claim 4 or 5, characterized in that the reference geometry (13) is defined with respect to a reference coordinate system (103) by two straight line sections (19) arranged at an angle to one another in a y-direction and a longitudinal straight line section (16) extending centrally between the two straight line sections (19) in an x-direction, wherein a first reference line (104) lies on one straight line section (19), a second reference line (105) on the other straight line section (19) and a third reference line (106) on the longitudinal straight line section (16), wherein the theoretical center point (107) on the third reference line (106) is at a distance (109) is arranged at an intersection point (108) of the first and second reference lines (104, 105).

9. A method for determining a connection position between a charging connection (5) and a charging contact (7) of a charging arrangement (1) according to one of the preceding claims, in which: - at least two reference lines (104, 105) defined by the charging connection (5) are determined; - based on the reference lines (104, 105) a theoretical center point (107) is determined as connection position of the charging connection (5) is determined; - the charging contact (7) is aligned to the theoretical center point (107).

10. Method according to claim 9, characterized in that to determine the reference line (104, 105) a reference run is carried out, wherein in During the reference run, a reference geometry (13) of the charging connection (5) is scanned and for each reference line (104, 105) at least two scanning points (22) of the reference geometry (13) are recorded.

Images