Connection system for a curb or paving stone charging device for charging electrically driven vehicles

Abstract

The invention relates to a connection system for a curb or paving stone charging device (18) for charging electrically driven vehicles (32), comprising a curb or paving stone unit (34) with a main part (36) and a protective cover (42); a receiving area which is delimited by walls of the curb or paving stone unit (34); a charging socket (24) which is arranged in the curb or paving stone unit (34); a power supply cable (22), via which a current can be supplied at least indirectly to the charging socket (24); and a cable feedthrough channel (84) which is formed on one of the delimiting walls (40) of the curb or paving stone unit (34) and through which the power supply cable (22) protrudes into the receiving chamber (38). According to the invention, at least one component of the power supply cable (22) extends into the receiving chamber (38) in the direction of the protective cover (42) through one of the walls (40) which delimits the receiving chamber (38). The aforementioned connection system simplifies the installation process and allows a good degree of accessibility to the power supply cable so that the power supply cable can be easily connected.

Description

[0001] DESCRIPTION

[0002] Connection system for a curb, kerb or paving stone charging device for charging electrically powered vehicles

[0003] The invention relates to a connection system for a curb, kerb or paving stone charging device for charging electrically powered vehicles, comprising a curb, kerb or paving stone unit with a base body and a protective cover, a receiving space delimited by walls of the curb, kerb or paving stone unit, a charging socket arranged on the curb, kerb or paving stone unit, a power supply cable via which the charging socket can be supplied with power at least indirectly, and a cable feedthrough channel formed on one of the delimiting walls of the curb, kerb or paving stone unit and through which the power supply cable projects into the receiving space.

[0004] Curbside, paving, or curb charging devices are charging stations integrated into the curb, paving, or curb to which vehicles can be connected via an electrical connection to charge their energy storage units or batteries. This applies particularly to purely electric vehicles but also to hybrid vehicles. Chargeable vehicles can be passenger cars, trucks, motorcycles, or electric bicycles.

[0005] Due to the new legislation and the growing interest of the population in climate protection as well as the improved economic viability of electrified vehicles, it is to be expected that the proportion of electric vehicles will increase dramatically, especially in inner-city areas, so that the available charging infrastructure must be expanded significantly. This means that some of the existing parking spaces must be provided with appropriate charging options in order to ensure individual mobility in the future.

[0006] Known concepts for this include the use of streetlights, additional charging stations, or wall boxes on building walls. All of these concepts require additional space and cause disruption to pedestrians due to the charging cables required.

[0007] For this reason, charging systems have become popular where the charging devices are integrated into the curb or kerb. This has the advantage that no charging stations obstruct the sidewalks and thus spoil the visual appearance. Instead, no additional space is required, simply utilizing existing infrastructure. Modularization allows for high flexibility and retrofit capability. Damage to the charging infrastructure caused by vehicle accidents can also be prevented.

[0008] However, regardless of whether the curb, paving stone, or kerb charging devices have an internal charging controller or simply need to accommodate the charging socket, they must be powered via a power supply cable. The power supply cables used for this purpose have a relatively wide cross-section, which must be inserted into the existing charging device housing and connected internally.

[0009] No installation-friendly designs have been identified to date. For example, DE 10 2016 112 613 proposes a corresponding curbside charging device in which the power supply cable is routed over the rear wall into the curb and sealed there with a grommet.

[0010] However, such a connection system poses the problem that the power supply cable is extremely difficult to access during installation of the curb, requiring radii for redirection, which greatly complicates installation. Furthermore, the additional horizontal opening in the rear wall of the curb increases the risk of water ingress into the curb's receiving space.

[0011] The task therefore arises to provide a connection system for a curb, kerb or paving stone charging device for charging electrically powered vehicles, with which the installation for connecting the power supply cable in the curb is simplified and the bending radii specified by the manufacturers can be maintained in the tightest installation space and damage caused by water ingress can be reliably avoided.

[0012] This object is achieved by a connection system for a curb, kerb or paving stone charging device for charging electrically powered vehicles having the features of main claim 1.

[0013] The connection system according to the invention for a curb, kerb, or paving stone charging device for charging electrically powered vehicles comprises a curb, kerb, or paving stone unit with a base body and a protective cover, which encloses a receiving space between the base body and the protective cover. Accordingly, walls of the curb, kerb, or paving stone unit delimit this receiving space. This unit can be composed of several individual components and thus, in addition to the base body, which can consist in particular of stone, a plastic such as fiber-reinforced plastic, concrete, and various steel parts or reinforcements, can also comprise further components. In addition to a charging socket, an electronics unit can also be arranged in the receiving space, which can contain a charging controller, an energy meter, radio antennas, a contactor, and other electronic components.The protective cover essentially closes the receiving space, usually geodetically, at least at the top when installed. In this context, "essential" means that the protective cover can have openings that are closed by other components or cover parts to close the receiving space at the top. Accordingly, this protective cover preferably faces a surface that forms a sidewalk, a road, or a cycle path and is preferably located at the edge of a road or parking lot. The surface of the protective cover itself accordingly forms part of the driving or walking surface.

[0014] A charging socket is located on the curb, kerbstone, or paving stone unit. This can be attached, in particular, near the protective cover, so that the insertion opening protrudes from the receiving space. However, this charging socket can also be designed to be liftable or pivotable. In either case, the charging socket must be supplied with power inside the receiving space. This is done via a power supply cable, through which the charging socket can be supplied with power at least indirectly. "At least indirectly" here means that various electronic components can also be located inside the unit, which are connected between the charging socket and the power supply cable, thus creating a self-sufficient charging station.The power supply cable protrudes into the receiving space and is connected directly or via additional electronic components to a charging socket, which is accessible during a charging process via an opening in the protective cover so that a plug can be inserted into the charging socket.

[0015] Accordingly, a cable feedthrough channel is formed on one of the defining walls of the curb, kerbstone, or paving stone unit, through which the power supply cable protrudes into the receiving space. The power supply cable extends through one of the walls defining the receiving space, with at least one component pointing toward the protective cover, into the receiving space. This means that the power supply cable is routed into the receiving space in such a way that it points either diagonally or straight upwards. Thus, during assembly of the curb, kerb, or paving stone unit, it can be pulled upwards into the receiving space from the open side before the cover is closed and before the curb is placed on the foundation.Accordingly, the power supply cable can be routed into the cable entry channel before the curb, kerbstone, or paving stone unit is installed, and the curb can then be moved toward the foundation, sidewalk, or adjacent stone. Thanks to the angled or straight upward design, the cable automatically slides into the receiving space and upwards, from where it can be easily grasped and guided upwards without having to create large radii on the relatively stiff power supply cable in a confined space. This significantly simplifies handling during installation. The easy accessibility of the power supply cable also improves the electrical connection within the receiving space.

[0016] Preferably, the curb, kerbstone, or paving stone unit is mounted on a foundation with a base surface, with the power supply cable extending from the outside through the cable duct into the receiving space at an angle of 30° to 90° to the base surface. The base surface forms the usually smooth lower surface, which defines the bottom of the base body and with which the curb, kerbstone, or paving stone unit is typically mounted on a concrete foundation. Accordingly, an angle of at least 30° is included to the horizontal plane, ensuring that the power supply cable points sufficiently upwards.

[0017] In a further embodiment, an opening is formed in a wall of the curb, kerbstone, or paving stone unit serving as the floor of the receiving space. A conduit is arranged in the opening, extending into a foundation below the curb, kerb, or paving stone unit. Such a conduit can be used both to accommodate the power supply cable and to drain water from the receiving space.

[0018] The conduit is preferably secured via a flange resting on a floor surface of the receiving space. This extension ensures that the conduit cannot slide axially out of the opening toward the foundation. This flange can also be used to seal the opening in the floor leading to the conduit.

[0019] In order to fix the empty pipe axially in the other direction as well, the empty pipe is axially fastened using a fixing element which rests on the base surface of the curb, kerbstone or paving stone unit.

[0020] This fixing element is preferably designed as a clamp, which is easy to install.

[0021] The empty conduit advantageously ends at the end of the opening in the wall surrounding the receiving space. This makes it possible to drain water collecting on the floor of the receiving space through the empty conduit at floor level. Accordingly, the opening or empty conduit extends from the lowest point of the receiving space through the floor. Due to gravity, any water present flows along the floor to the empty conduit and is drained downwards through the empty conduit.

[0022] Preferably, a check valve is installed in the empty pipe, which is permanently closed toward the receiving space. This allows water to be drained from the receiving space, but prevents pressurized water from entering the receiving space from below via the empty pipe.

[0023] The empty pipe is sealed to the wall that defines the receiving space so that no water can penetrate through a gap between the defining wall and the empty pipe.

[0024] Preferably, a strainer or filter is installed in the curb, kerbstone, or paving stone unit, covering the empty pipe. This prevents the water drain from becoming clogged by solids in the empty pipe, as these are separated by the filter or strainer.

[0025] The sieve or filter is ideally positioned on the floor of the receiving chamber and extends over the empty pipe on all sides. This allows the sieve to be mounted at the lowest position in the receiving container, preventing water from accumulating in the receiving chamber.

[0026] In a preferred embodiment of the invention, the sieve or filter has a curvature that protrudes inward into the receiving space. This curvature ensures continued water drainage even when the sieve becomes dirty, as the solids collect in the lower area of ​​the sieve, while the higher areas of the sieve's curvature remain free and thus permeable to water.

[0027] In an alternative embodiment, the sieve or filter is arranged inside the empty pipe and has a cylindrical shape with a diameter smaller than the diameter of the empty pipe. The sieve or filter has a sealing surface at one axial end that seals radially inward and a sealing surface at the other axial end that seals outward toward the empty pipe. Accordingly, the sieve or filter is flowed through radially from the outside in or from the inside out. Here, too, the dirt settles in the lower area, while the upper area remains open to water.

[0028] It is particularly preferred if the conduit forms the cable feedthrough channel, and the power supply cable extends through the conduit into the receiving space. Accordingly, the conduit can be used to route both the power supply cable and the water drainage system.

[0029] In a further preferred embodiment of the invention, the power supply cable extends through the ground into the receiving space at an angle of 90° to the base surface. This simplifies installation, as the curb, kerbstone, or paving stone unit can be placed directly over the power supply cable emerging from the ground, and the curbstone can be placed on the foundation. The cable then protrudes upwards from the base body, making it easily accessible, and can then be connected inside.

[0030] The conduit preferably extends through the ground with the internal power supply cable and below the base into the foundation. The foundation surrounds the conduit and the power supply cable outside the curb, kerbstone, or paving stone unit. Accordingly, the power supply cable can be aligned with the conduit already in the foundation and its length can also be correctly adjusted.

[0031] The inner diameter of the conduit is larger than the outer diameter of the power cable, creating a gap between the power cable and the conduit. This gap allows water to drain from the receiving space of the curb, kerbstone, or paving stone unit.

[0032] The check valve in the conduit preferably surrounds the power supply cable so that the gap can be used for water drainage, but prevents water from the ground from penetrating upwards to the curb, kerbstone or paving stone unit.

[0033] In an alternative embodiment according to the invention, the check valve is arranged at the end of the conduit, and a Y-shaped pipe section is formed between the base of the curb, kerbstone, or paving stone unit and the check valve, through which the power supply cable exits the conduit. This design allows for a very simple check valve to be provided, in which, for example, a ball is guided in a cone with a circumferential surface containing openings, the narrow side of which faces the conduit and is closed at the bottom, so that the ball is pushed upwards by the water pressure within the cone against the end of the conduit, closing it.

[0034] It is also advantageous if the sieve or filter covers a gap between the power supply cable and the empty conduit, which also prevents dirt from penetrating the gap in this design, but at the same time allows water to drain away. The sieve or filter preferably has a diameter that is larger than the diameter of the power supply cable and has a sealing surface for the power supply cable at one axial end and a sealing surface for the empty conduit at its other axial end. Such a sieve is preferably arranged in the region of the opening in the floor. Flow through this sieve radially inwards or outwards accordingly and prevents the gap from becoming blocked by dirt.

[0035] In a particularly preferred embodiment, the power supply cable inside the receiving space can be connected to an electronics unit via a quick-connect coupling. This simplifies the electrical connection and prevents errors when connecting the curb, kerb, or paving stone charging device during installation. This can therefore also be performed by non-professional personnel. Depending on the sealing concept, this quick-connect coupling must be watertight. Alternatively, a conventional connection using clamps or screws is also conceivable.

[0036] Preferably, the power supply cable is routed in a curve within the receiving space, with one end of the power supply cable extending parallel to the protective cover. This allows the end of the power supply cable to be easily connected to the curb, kerb, or paving stone charging device, simplifying installation. Furthermore, bends in the power supply cable are minimized, simplifying handling of the otherwise difficult-to-bend power supply cable.

[0037] An additional simplification is achieved if the end of the power supply cable extends along the protective cover, adjacent to the protective cover. When the protective cover is open, the end of the power supply cable is freely accessible to the installer, as there are no components between the protective cover and the opening in the receiving space, which is closed by the protective cover when closed.

[0038] Preferably, the power supply cable is routed in a curve within the receiving space, with one end of the power supply cable extending in the longitudinal direction of the receiving space and thus also of the protective cover. This expands the freely accessible space for establishing the electrical connection.

[0039] It is particularly advantageous if a guide element is arranged inside the receiving space, along which the power supply cable is guided. Such a guide element can be used to fix the bend in the installed state and prevent unintentional displacement of the power supply cable during assembly.

[0040] In a further embodiment, the guide element is formed on an electronics box located inside the receiving space and to which the counterpart of the quick-connect coupling is attached. Accordingly, the power supply cable is guided relative to the electronics box, to which it must also be connected, thereby aligning the end of the power supply cable for connection to the electronics box. The electronics box can contain various circuit breakers, a power supply unit, a charging controller, an energy meter, radio antennas, and the like.

[0041] To minimize the number of necessary bends while still ensuring optimal accessibility of the power cable during connection, the guide element forms a quarter circle. The power cable is preferably flexible, at least in the section that extends into the curb, kerbstone, or paving stone unit, which significantly simplifies handling during installation.

[0042] Furthermore, it is advantageous if the power supply cable has a length adjustment marking so that the cable protrudes through the curb at a defined length. This also simplifies the electrical connection.

[0043] Thus, a connection system for a curb, kerb or paving stone charging device for charging electrically powered vehicles is provided, which enables a simple electrical connection of the power supply cable, achieves simple assembly and achieves a connection for establishing a water drain from the receiving space, which can be coupled to the electrical connection.

[0044] A non-limiting embodiment of a connection system according to the invention shown in the figures is described using the example of a curb charging device for charging electrically powered vehicles.

[0045] Figure 1 shows a schematic diagram of a road with a limiting curb loading device in plan view.

[0046] Figure 2 shows a perspective side view of a curbside charging device with a connection system according to the invention from the rear.

[0047] Figure 3 shows a side view of the curb charging device with the connection system according to the invention from Figure 2 from the other front side. Figure 4 shows a section from Figure 2 or 3 in the area of ​​the feedthrough of the power supply cable in a sectional view.

[0048] Figure 1 shows a walking or driving surface 10 in the form of a sidewalk, which is bordered on one side by a house wall 12 and on the other side by a curb 14 formed by several stone elements 16 and curb charging devices 18 according to the invention, forming a boundary to the street 19. On the side of the sidewalk facing away from the curb 14, there is an energy source 20 in the form of a power connection connected to the power grid. The energy source 20 is connected to the curb or kerb charging devices 18 via underground power supply cables 22. Charging sockets 24 are arranged on the curb charging devices 18, into which a plug 26 is inserted. The plug 26 is connected via a cable 28 to an energy storage device 30, in particular a battery of an electrically powered vehicle 32, so that this energy storage device 30 can be charged via the energy source 20.

[0049] The curb loading device 18 shown in Figures 2 and 3 consists of a curb unit 34, which has a base body 36, which is made, for example, of concrete or plastic and may have fiber reinforcements or reinforcements, and in which a receiving space 38 is formed, which is delimited by walls 40 of the base body 36. The receiving space 38 can, in particular, be substantially hollow cuboid-shaped and has a side open to the surface of the sidewalk 10, which is closed by a protective cover 42, whose outward-facing surface 44 forms the outer part of the walking or driving surface 10. The protective cover 42, which is in particular made of steel, is fastened to the base body 36 or to a receiving container 46 arranged in the receiving space 38 and closes the upward-facing, open side of the receiving space 38, in particular with the interposition of a seal, which is not shown.In addition, the protective cover 42 also rests on an upper side of the walls 40 of the base body 36 and thus extends over the ends of the receiving space 38 when viewed in the longitudinal direction.

[0050] The protective cover 42 has a rounded impact wall 48, which covers an edge between the top of the base body 36 and a side surface of the base body 36 facing the street. The protective cover 42 can be attached by means of screws.

[0051] The charging socket 24 is fastened from the inside to the protective cover 42 and is electrically connected to an electronics box 50, which is also arranged in the receiving space 38, is fastened to the protective cover 42 and can contain an electronics unit 51 with various electronic components, such as circuit breakers, energy meters, power supplies, charging controllers and the like, via which the charging socket 24 is controlled.

[0052] The curb unit 34 has a bottom 52 as a downwardly bounding wall 40, the base area 54 of which, in the installed state, is placed on a foundation 56, which can in particular be made of concrete.

[0053] An opening 58 is formed in this base 52, which extends from the base surface 54 to a floor surface 60, which defines the receiving space 38 and thus the receiving container 46 at the bottom. An empty pipe 62, the outer diameter of which essentially corresponds to the inner diameter of the opening 58, extends into this opening 58 from below out of the foundation 56. The empty pipe 62 ends at a flange 64, which rests on the floor surface 60 or is fastened there as tightly as possible, thereby sealing any gap that may be present between the empty pipe 62 and the surrounding wall surfaces 66 defining the opening 58, although this sealing can also be effected over the circumference of the empty pipe 62.The flange 64 is located at a lowest point of the base surface 60 and is either made as thin as possible or is sunk into the base 52 and fixes the empty pipe 62 in the axial direction in the opening 58 so that it cannot be displaced into the receiving space 38.

[0054] On the side of the base 52 opposite the flange 64, the empty pipe 62 is surrounded by a fixing element 67 in the form of a clamp, which is fastened to the empty pipe 62 and bears against the base surface 54 in order to prevent axial displacement of the empty pipe 62.

[0055] The empty conduit 62 extends through the foundation 56 into the ground, where a check valve 68 is arranged on the empty conduit 62. In the present embodiment, this consists of a truncated cone 70 which has a sieve-like bottom surface 72 in which a ball 74 is arranged. The narrow side of the truncated conduit 70 is placed sealingly over an open end 76 of the empty conduit 62, while the bottom surface 72 of the truncated conduit 70 is directed downwards. If water, in particular groundwater, were to press into the empty conduit 62 from below, the ball 74, whose density should be no lower than the density of water, floats on the water column and is pressed against the open end 76 of the empty conduit 62, so that no water can penetrate into the empty conduit 62 from below, but water can be drained from the receiving space 38 via the empty conduit 62 into the ground.

[0056] In order to prevent the empty pipe 62 from becoming clogged with contaminants, a cylindrical sieve 78 is located in the empty pipe 62, but at a distance from it, as can be seen in Figure 4. The sieve 78 has a radially outwardly sealing surface 80 at the upper axial end, which rests on the flange 64 of the empty pipe 62, and a radially inwardly sealing second sealing surface 82 at the lower end. Accordingly, water from the receiving space 38 must first flow along the bottom surface 60 in the direction of the empty pipe 62, since this is arranged at the lowest point of the bottom surface 60, and there flow via the flange 64 and the radially outwardly sealing surface 80 of the sieve 78 into the radial interior of the sieve 78. There, entrained contaminants are separated, while the water can be discharged radially outwards through the sieve 78 and then axially along the empty pipe 62 into the ground.Water flow on the radially inner side of the screen 78 is prevented by the radially inward-facing lower sealing surface 82. In the illustrated embodiment, this lower sealing surface 82 rests radially inward against the power supply cable 22.

[0057] The power supply cable 22 extends from the foundation 56 through the empty conduit 62, which accordingly serves as a cable feedthrough channel 84, into the receiving space 38. A sufficiently large gap 86 is formed between the power supply cable 22 and the empty conduit 62 so that water can drain away and the strainer 78 can be arranged between the power supply cable 22 and the empty conduit 62. Accordingly, the strainer 78 must have a distance both outwardly from the empty conduit 62 and inwardly from the power supply cable 22.

[0058] As an alternative to the exemplary embodiment shown, this gap 86 can also be selected to be significantly smaller if, instead of the cylindrical sieve 78, a sieve 88 is used which rests on the flange 64 of the empty pipe 62, has an upwardly directed curvature 90 and an opening in the center for the passage of the power supply cable 22, as shown in dashed lines in Figure 3.

[0059] In the foundation 56 or below the foundation 56, a Y-pipe section 91 is arranged, at which the power supply cable 22 is led out of the empty pipe 62, so that the check valve 68 is arranged at the lower end of the empty pipe 62 in an area in which no power supply cable 22 is present in the empty pipe 62.

[0060] Alternatively, it would also be conceivable to design the check valve differently so that it could be arranged in the gap 86 between the power supply cable 22 and the empty pipe 62.

[0061] Within the receiving space 38, the power supply cable 22 initially extends perpendicular to the base surface 54 in the direction of the protective cover 42 and is then guided in a 90° arc 92 along a guide element 94 in the direction of the protective cover 42. One end 96 of the power supply cable 22 subsequently extends parallel to the protective cover 42 in its longitudinal direction at the upper end of the receiving space, so that when the protective cover 42 is closed, the end 96 of the power supply cable 22 is positioned opposite the protective cover 42. The guide element 94 is formed on the electronics box 50 and describes a quarter circle along which the guidance takes place.At the end 96 of the power supply cable 22, a first electrical coupling element 98 is arranged, which forms a quick-release coupling 102 with a counterpart 100 projecting laterally from the electronics box 50, so that the power supply cable 22 can be easily connected to the electronics box 50 for power supply from above by simply closing the quick-release coupling 102. When connecting the power supply by closing the quick-release coupling, the installer has free access through the open cover without any additional elements obstructing access.

[0062] The described connection system enables very simple installation of the curbside charging device, allowing the installer, even a non-trained electrician, to complete the electrical connection flawlessly. The existing bends of the power supply cable can be installed with minimal effort, even with large-diameter cables. In addition, reliable water drainage is provided, which does not require any additional openings in the curbside unit.

[0063] It should be clear that various modifications are possible compared to the described embodiment. In addition to the curb, other stone units forming walking or driving surfaces can be used, which can be designed with or without integrated electronics. For example, with centralized charging control, the charging socket can also be connected directly to the power supply cable. The power supply cable can also be inserted, for example, at an appropriate angle, pointing upwards through the rear of the base body, or the water drainage can be implemented as a separate opening in the floor.

Claims

P A T E N T A N S P R Ü C H E 1. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) comprising a curbstone, kerbstone or paving stone unit (34) with a base body (36) and a protective cover (42), a receiving space bounded by walls of the curbstone, kerbstone or paving stone unit (34), a charging socket (24) arranged on the curbstone, kerbstone or paving stone unit (34), a power supply cable (22) through which the charging socket (24) can be supplied with power at least indirectly, a cable entry channel (84) formed on one of the bounding walls (40) of the curbstone, kerbstone or paving stone unit (34), and through which the power supply cable (22) projects into the receiving space (38), characterized in thatthat the power supply cable (22) extends through one of the walls (40) bounding the receiving space (38) with at least one component in the direction of the protective cover (42) into the receiving space (38).

2. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 1, characterized in that the curbstone, kerbstone or paving stone unit (34) is mounted on a base (54) with the power supply cable (22) extending at an angle of 30° to 90° to the The base area (54) extends from the outside through the cable entry channel (84) into the receiving space (38). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 1 or 2, characterized in that an opening (58) is formed in a wall (40) of the curbstone, kerbstone, or paving stone unit (34), which serves as the floor (52) of the receiving space (38), in which a conduit (62) is arranged, which extends into a foundation (56) below the curbstone, kerbstone, or paving stone unit (34). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 3, characterized in that the conduit (62) is attached via a flange (64) which rests on a floor surface (60) of the receiving space (38).Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 3 or 4, characterized in that the empty tube (62) is axially fixed via a fixing element (66) which rests against the base surface (54) of the curbstone, kerbstone, or paving stone unit (34). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 5, characterized in that. The fixing element (66) is a clamp. Connection system for a curbstone, kerbstone, or paving stone loading device (18) for charging electrically powered vehicles (32) according to any one of claims 3 to 6, characterized in that the conduit (62) terminates at the end of the opening (58) of the bounding wall (40) towards the receiving space (38). Connection system for a curbstone, kerbstone, or paving stone loading device (18) for charging electrically powered vehicles (32) according to any one of claims 3 to 7, characterized in that the opening (58) extends from a lowest position of the receiving space (38) through the floor (52). Connection system for a curbstone, kerbstone, or paving stone loading device (18) for charging electrically powered vehicles (32) according to any one of claims 3 to 8, characterized in that a check valve (68) is arranged in the conduit (62), which is continuously closed in the direction of the receiving space (38).Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of claims 3 to 9, characterized in that the empty tube (62) is sealed to the wall (40) defining the receiving space (38). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to any one of claims 3 to 10, characterized in that a sieve (78) or a filter is arranged in the curbstone, kerbstone, or paving stone unit (34), through which the empty tube (62) is covered. Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 11, characterized in that the sieve (78) or the filter rests on the floor (52) of the receiving chamber (38) and extends over the empty tube (62) on all sides. Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 12, characterized in that the sieve (78) or the filter has a bulge (90) projecting inwards into the receiving chamber (38).Connection system for a curbstone, kerbstone or paving stone loading device (18) for charging electrically powered vehicles (32) according to claim 12, characterized in that the sieve (78) or filter is arranged inside the empty tube (62) and has a cylindrical shape with a diameter that is smaller than the diameter of the empty tube (62), wherein the sieve (78) or filter has a sealing surface (82) at one axial end sealing radially inwards and at its other axial end The end has a sealing surface (80) that seals towards the outside of the empty tube (62).

15. Connection system for a curb, kerb or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the empty tube (62) forms the cable passage channel (84) and the power supply cable (22) extends through the empty tube (62) into the receiving space (38).

16. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the power supply cable (22) extends at an angle of 90° to the base surface (54) through the floor (52) into the receiving space (38).

17. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of claims 15 or 16, characterized in that the empty conduit (62) with the internal power supply cable (22) extends through the floor (52) and below the base surface (54) into the foundation (56).

18. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of claims 3 to 17, characterized in that The inner diameter of the conduit (62) is larger than the outer diameter of the power supply cable (22). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to any one of claims 9 to 18, characterized in that the check valve (68) is arranged at the end of the conduit (62) and a Y-shaped pipe section (91) is formed between the base (54) of the curbstone, kerbstone, or paving stone unit (34) and the check valve (68), from which the power supply cable (22) exits the conduit (62). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to any one of claims 9 to 18, characterized in that the check valve (68) surrounds the power supply cable (22) in the conduit (62).Connection system for a curb, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to any one of claims 11 to 19, characterized in that the sieve (78) or filter covers a gap (68) between the power supply cable (22) and the conduit (62). Connection system for a curb, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 14, characterized in that. the sieve (78) or filter has a diameter that is larger than the diameter of the power supply cable (22) and has a sealing surface to the power supply cable (22) at one axial end and a sealing surface to the conduit (62) at its other axial end.

23. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the power supply cable (22) can be connected inside the receiving space (38) to an electronic unit (51) via a quick coupling (100).

24. Connection system for a curbstone, kerbstone or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the power supply cable (22) is guided in the receiving space (38) in an arc (92) and one end (96) of the power supply cable (22) extends parallel to the protective cover (42).

25. Connection system for a curb, kerb or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the end (96) of the power supply cable (22) extends along the protective cover (42) adjacent to the protective cover (42). Connection system for a curb, kerb, or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the power supply cable (22) is guided in the receiving space (38) in an arc (92) and one end (96) of the power supply cable (22) extends in the longitudinal direction of the receiving space (38). Connection system for a curb, kerb, or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that a guide element (94) is arranged inside the receiving space (38), along which the power supply cable (22) is guided in the receiving space (38).Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 26, characterized in that the guide element (94) is formed on an electronics box (50) located inside the receiving space (38) and to which the counterpart (100) of the quick-release coupling (102) is attached. Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to claim 26 or 27, characterized in that the guide element (94) describes a quarter circle. Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the power supply cable (22) is flexible at least in its section projecting into the curbstone, kerbstone, or paving stone unit (34). Connection system for a curbstone, kerbstone, or paving stone charging device (18) for charging electrically powered vehicles (32) according to one of the preceding claims, characterized in that the power supply cable has a length adjustment mark.

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