WO2024104576A1

WO2024104576A1 - Kerb charging device for charging an energy store of an electrically driven vehicle

Info

Publication number: WO2024104576A1
Application number: PCT/EP2022/082120
Authority: WO
Inventors: Axel Hemsing; Felix STRACKE; Jens Hoffmann; Andreas Bretz
Original assignee: Pierburg Gmbh
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2024-05-23

Abstract

The invention relates to a kerb charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) comprising - a main body (34) made of one or more of the materials including concrete, natural stone, plastic and composite material and having a receiving space (46), which is bordered by two side walls (38) bordering the main body (34) in the longitudinal extension direction, one front wall (40) extending in the longitudinal extension direction, a rear wall (42) extending in the longitudinal extension direction and a base (36) of the main body (34), - a closure cover (82) covering an upper side of the receiving space (46) and regions of an upper side (78) of the side walls (38) of the main body (34), of an upper side (60) of the front wall (40) and of an upper side (70) of the rear wall (42) adjacent to the upper side of the receiving space (46), - and a charging unit (48) arranged in the receiving space (46), wherein, according to the invention, the front wall (40) is securely connected to the rear wall (42) via at least one force transmission element (90). A kerb charging device (18) is thus created which ensures a high level of durability alongside low costs.

Description

DESCRIPTION

Curb or kerb charging device for charging an energy storage device of an electrically powered vehicle

The invention relates to a curbstone or kerbstone charging device for charging an energy storage device of an electrically powered vehicle with a base body which is made of one or more of the materials concrete, natural stone, plastic and composite material and has a receiving space which is delimited by two side walls delimiting the base body in the longitudinal direction, a front wall extending in the longitudinal direction and a rear wall extending in the longitudinal direction and a base of the base body, a closure cover which covers an upper side of the receiving space and areas of an upper side of the side walls of the base body, an upper side of the front wall and an upper side of the rear wall adjacent to the upper side of the receiving space, and a charging unit which is arranged in the receiving space.

Such curb charging devices are charging stations integrated into the curb to which vehicles can be connected via an electrical connection in order to charge their energy storage units or batteries. This particularly applies to purely electrically powered vehicles but also to hybrid vehicles. Vehicles that can be charged can be passenger cars, trucks, motorcycles or electric bicycles.

Due to the new legislation, the increasing interest of the population in climate protection and the improved economic efficiency of electrified It is expected that the proportion of electric vehicles will increase dramatically, particularly in inner-city areas, so that the available charging infrastructure must be expanded to a great extent, which means that some of the existing parking spaces must be provided with appropriate charging options in order to ensure individual mobility in the future.

Known concepts for this include the use of street lamps, additional charging stations or wall boxes on house walls. All of these concepts require additional space and cause a disturbance to pedestrians due to the charging cables that have to be used.

For this reason, charging systems have become known in which the charging devices are integrated into the curb or kerbstone. This has the advantage that no charging stations block the sidewalks and thus spoil the visual impression. Instead, no additional space is required, but rather the existing infrastructure is used. There is a high degree of flexibility and retrofitting is possible thanks to possible modularization. Damage to the charging infrastructure caused by vehicle accidents can also be prevented.

Accordingly, DE 10 2017 218 947 A1 proposes arranging a charging device for charging vehicles in the curb of a road boundary. The curb is either designed with an energy supply or has its own energy storage unit.

A special design of such a curbstone with electronics for charging a vehicle is known from GB 2 592 186 A. This curbstone is modular and has a base element into which a receptacle can be used which can be replaced and is therefore not attached. The components for electrically charging a vehicle battery are arranged in this container. The receptacle is open at the top and is closed by a lid which limits the base element towards the street with a sloping wall. The base element as well as the container and the lid are made of plastic.

The problem with a curbstone designed in this way is that it is not sufficiently durable, since the lid with the container is pushed against the base element when a vehicle tire hits the curbstone, meaning that the container and the lid are initially subjected to stress and this stress is then suddenly transferred to the base element. The tensile forces that occur cannot be adequately absorbed in such a curbstone, which can lead to severe deformation and breakage.

Furthermore, GB 232332 A discloses a combined gutter and curbstone with a cavity in which electrical cables are arranged and which is closed at the top by a cover. The front wall and rear wall bordering the cavity are reinforced by metal rods inserted into the concrete. The cover rests on shoulders of the front wall and rear wall. When the front wall is loaded, its thinnest area is loaded against the cover, which in turn is pushed against the thin section of the rear wall, so that there is a risk of the front wall and rear wall breaking in the upper area.

The task is therefore to provide a curb or kerb charging device for charging an energy storage device of an electrically powered vehicle, which has a high durability and can therefore be used in large quantities as a curb in cities, but also in car parks or motorway service stations, without the need for constant maintenance or frequent replacement. The electronics in the receiving space should be protected from damage and the curb itself should continue to function as a road barrier, with no damage and consequently no damage to car tires caused by parts of the curb breaking off. It should be possible to manufacture such a curb as inexpensively as possible. In addition, the curb should be as flexible as possible and installation should be as simple and error-free as possible. The curb or kerb charging device should be easy to retrofit in prepared streets. The electronics should be easy to remove for maintenance and comply with existing standards. Furthermore, a high level of tightness against the ingress of water and dirt should be achieved.

This object is achieved by a curb or kerb charging device for charging an energy storage device of an electrically powered vehicle with the features of the main claim 1.

A curbstone or kerbstone charging device according to the invention for charging an energy storage device of an electrically powered vehicle has a base body which is made of one or more of the materials concrete, natural stone, plastic, which can also be fiber-reinforced, and/or a composite material. Concrete is of course also understood to mean ultra-high-strength concrete (UHPC), fiber-reinforced concrete or polymer concrete in which a plastic is used as a binding agent instead of cement. A receiving space is formed inside the base body. In order to delimit this, the base body has at least two side walls delimiting the base body in the longitudinal direction, one in The base body has a front wall extending in the longitudinal direction, the outer wall surface of which, when installed, laterally delimits a driveway, a rear wall extending in the longitudinal direction, and a floor. If the base body is used as a curb, it can, for example, delimit a parking space to the front. If used as a kerb, the front wall extends parallel to the road and delimits it, while the rear wall rests against the paving stones of the sidewalk or the asphalt of a cycle path, for example, while the ends of the side walls each rest against an adjacent curb. Please note that in this context, the front wall and the rear wall only refer to part of the rear or front wall, while the side walls extend over the entire depth of the curb and thus form part of the front surface or rear surface of the curb.

The base body is open at the top and is closed by a closure cover, which is made in particular from metal or a fiber-reinforced plastic, so that this is arranged on the upper side of the receiving space. It also covers areas adjacent to the upper side of the receiving space, an upper side of the side walls, an upper side of the front wall and an upper side of the rear wall. This four-sided support of the closure cover means that loads from vehicle tires, for example, can be absorbed and evenly distributed into all walls of the curb or kerb. This creates a curb or kerbstone charging device with high strength, since even forces introduced over small areas can always be dissipated in the curb over several areas connected to the foundation. The cover can have windows or openings, for example to make an energy meter display visible or to make a charging socket accessible. A charging unit is arranged in the receiving space. In this context, a charging unit is understood to mean either just a charging socket or an inductive charger or a completely self-sufficient charging unit that only requires a power connection and contains all electronic components. Of course, individual electronic components of the charging unit, such as an energy meter, a charging controller or similar, can also be arranged in the receiving space. A charging unit is understood to mean any individual component or several components that can be used to charge the energy storage device of the electric vehicle or hybrid vehicle.

Furthermore, according to the invention, the front wall of the curb or kerbstone loading device is firmly connected to the rear wall via at least one force transmission element. The support of the closure cover prevents overloading of the edge areas of the curb adjacent to the closure cover. Instead, a force acting on the front wall can be diverted or partially absorbed via the rear wall through the fixed connection to the rear wall. It is important to provide a rigid connection in order to be able to divert any bending force immediately.

The durability and strength of the front wall facing the street is essentially maintained with such a design in comparison to solid curbs, since this wall is particularly sensitive to tensile forces that act on the side of the front wall facing the receiving space, for example when a vehicle impacts against the curb, and which are now significantly reduced by the force transmission element, since bending of the front wall is largely avoided. The terms top, bottom, front wall, rear wall, top, floor, side walls and the like always refer to the curb or kerbstone in its installed state on the road with its corresponding orientation and direction of view from the road.

Preferably, reinforcing bars are cast into the base body. These are mainly made of steel and serve to increase the strength and stability of the base body.

In a further embodiment, several reinforcing bars are U-shaped and extend from the front wall in a first 90° arc into the ground and over a second 90° arc into the rear wall. In this way, the rigidity and tensile strength of the base body is increased. The U-shape allows forces to be diverted in particular towards the ground and thus to the foundation.

Furthermore, a plurality of reinforcing bars extending in the longitudinal direction of the base body are preferably arranged in the base body, which also absorb bending stresses and resulting tensile forces on the rear side of the front wall.

In a further embodiment, two of the longitudinally extending reinforcing bars are arranged in the area of the arches of the U-shaped reinforcing bars and are attached to the U-shaped reinforcing bars, and one of the longitudinally extending reinforcing bars is arranged in an upper quarter of the front wall and the rear wall and is attached to the legs of the U-shaped reinforcing bars. The U-shaped reinforcing bars are thus fixed in their position relative to one another both in the area of their arches and in the upper area by the reinforcing bars extending along the curb, and a closed Grids are created. This reliably absorbs forces acting in different directions in the concrete, thus increasing the durability of the base body. The structure of the reinforcing bars is easy to manufacture and is stable in itself, so that it can be placed as a whole in the mold for the casting.

In order to make the front wall and the rear wall as thin as possible and still be able to surround the bar grid with enough concrete, the front wall and the rear wall in the area surrounding the legs of the U-shaped reinforcing bars have a greater wall thickness than in the other areas. This means that the walls that delimit the receiving space can be made very strong with less material. If the bars running in the longitudinal direction extend into the side walls, forces acting via the front wall can also be diverted to the side walls.

In a particularly preferred embodiment of the invention, the closure cover serves as a force transmission element and is firmly attached to the front wall and the rear wall via a screw fastening. Due to this firm connection of the closure cover to both the front wall and the rear wall, forces acting on the front wall are diverted via the cover directly towards the rear wall, which, when installed, rests firmly against the path behind it, so that forces can be diverted to the rear and into the ground or foundation. This connection also reduces tensile stresses, which would occur primarily in the upper area of the rear side of the front wall, since deformation of the front wall is largely reduced by the firm connection via the protective cover. The durability of such a curbstone is therefore significantly increased. In an alternative embodiment, the cover serves as a force transmission element and is positively attached to the front wall and the rear wall. This can be done using positioning pins, for example. The screw connection then follows, for example, via the side walls. This means fewer screws are required, so that assembly is also quicker. A preload can also be created against the expected forces.

In an advantageous embodiment that goes further than screw fastening, the reinforcement rods protrude from the tops of the rear wall and the front wall and have an external thread on their ends protruding from the base body, to which the closure cover is attached using screw nuts. In this way, the force is transmitted between the front wall and the rear wall directly via the reinforcement, which relieves the load on the concrete or plastic walls. Furthermore, the structure is significantly simplified because no further components, such as additional threaded rods, have to be cast around. The costs for producing the curb or kerbstone loading device are reduced accordingly.

In an alternative design, threaded bolts or sleeves are attached to the front and rear walls, via which the cover is attached to the base body. With such a design, the steel reinforcement can be dispensed with if necessary and the frictional connection between the front and rear walls can still be established by the frictional connection.

In a further development of this design, the threaded bolts or sleeves are cast into the base body. This allows a firm connection to be made without additional adhesive. In particular, the threaded bolts with their external thread protrude from the top of the front wall and the rear wall. This makes it easier to align the cover, which can be placed on the threaded bolts with its corresponding holes and easily screwed on from above.

The cover cap rests on the outer circumference with a circumferential profile seal on the top of the front wall, the rear wall and the side walls, and in an area further inward from the profile seal, the cover cap rests on raised areas that are formed on the top of the front wall and the rear wall. The profile seal protects the receiving space from the ingress of water or dirt and is compressed when the nuts are tightened, so that tolerance compensation is achieved and the cover cap always has a circumferential support surface for force transmission.

In a further embodiment, the closure cover and the screw fastening are covered by an outer cover that forms an extension of the walkway. This means that the screws are not accessible to users from the outside, which prevents vandalism. The closure cover only has to transfer the forces to be transferred from the front wall to the rear wall, while the outer cover can absorb vertical forces in particular and divert them to the side walls, the front wall and the rear wall and to the floor. A load on the closure cover pointing from the receiving space outwards to the rear wall and front wall, which would occur with a direct load from above and which would lead to a lateral load on the threaded bolts or reinforcing bars, is avoided by the outer cover. When installed, the outer cover preferably completely covers the edges between the top and the outward-facing wall surface of the front wall and the outward-facing wall surface and the top of the rear wall. These edges are thus protected from the introduction of larger forces over a small area, for example due to the impact of a vehicle tire.

In a further embodiment, the outer cover is attached to the closure cover with an intermediate cover in between. The intermediate cover, which can be designed as a reinforcing plate, rests with its underside against the closure cover and its upper side against the outer cover. This significantly increases the rigidity of the overall construction and prevents forces from occurring on the outer cover that would lead to major deformation of the outer cover, which means that it can be made significantly thinner.

To simplify assembly, the cover has two internal threads, through which the outer cover is attached to the cover using screws, with the intermediate cover in between. This means that the intermediate cover and the outer cover can be positioned and attached to the cover together using just two screws.

Furthermore, it is advantageous if the base body has a first rear wall section which extends from the bottom of the base body over a third to three quarters of the height of the base body upwards in the direction of the closure cover with a thicker wall thickness than in the second rear wall section adjoining it at the top. This first rear wall section then extends to under the sidewalk. In this way, an even greater stability of the rear wall for the discharge occurring forces in the surrounding soil or foundation.

In an alternative embodiment, the force transmission element is formed by partition walls of the base body, which extend in the receiving space from the front wall to the rear wall. This improves the rigidity and thus durability of the front wall, since it is supported by the partition walls to the rear wall, so that here too a force transmission to the rear wall takes place.

The partition walls preferably end below the top sides of the front wall and the rear wall, whereby at least existing cabling can continue to be carried out within the receiving space between the individual spaces created by the partition walls if parts of the loading unit are arranged in these.

The partition walls advantageously extend between the two legs of a U-shaped reinforcing bar, so that no additional thickenings have to be made on the front wall and the rear wall, which would further restrict the installation space. The thickness of the front wall and the rear wall can therefore be chosen to be relatively small.

In this case, the closure cover has an outer surface that forms the walkway and is attached to the base body via internally threaded bolts embedded in the area of the side walls, so that the multi-part cover can be dispensed with.

This creates a curb or kerb charging device for charging an energy storage device of an electrically powered vehicle, which offers high strength and durability with reduced Costs, which avoids damage to the curbs and kerbs and at the same time protects the electronics of the charging unit. Furthermore, the curb or kerb charging devices according to the invention are flexible and modular and yet very easy to install. The necessary excavation work for installation is minimized, as is the number of assembly steps to implement a system that can be used, for example, to build a smart city with networks, charging stations, counting and measuring systems. The cityscape is not changed. Loss of space is avoided, as are tripping hazards caused by cables on the sidewalks.

Two non-limiting embodiments of curb or kerb charging devices according to the invention for charging an energy storage device of an electrically powered vehicle are described below using the example of curb charging devices.

Figure 1 shows a schematic diagram of a road with a limiting curb or kerb loading device in plan view.

Figure 2 shows a perspective view of a first embodiment of a base body of a curb or kerbstone loading device according to the invention.

Figure 3 shows a perspective view of the base body from Figure 1 with the force transmission element attached.

Figure 4 shows a perspective view of the base body from Figure 1 with the force transmission element attached and the outer cover in place. Figure 5 shows a section of a cross section through the curbstone or kerbstone loading device according to the invention according to Figures 2 to 4.

Figure 6 shows a perspective view of a second embodiment of a base body with a force transmission element of a curb or kerbstone loading device according to the invention.

Figure 1 shows a walkway 10 which is delimited on one side by a house wall 12 and on the other side by a curb edge 14 which is formed by several stone elements 16 and curb charging devices 18 according to the invention and forms a boundary to a driveway 19 in the form of a road. On the side of the walkway 10 facing away from the driveway 19 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 energy supply cables 22. Charging sockets 24 are arranged on the curb or kerb charging devices 18, into which plugs 26 are inserted, which are each connected via cables 28 to an energy storage device 30, in particular a battery of an electrically operated vehicle 32, so that this energy storage device 30 can be charged via the energy source 20.

Curbstone or kerbstone loading devices 18 according to the invention are shown in Figures 2 to 6. In the following, the terms "top", "bottom", "below", "above" or similar refer to the state of the curbstone or kerbstone loading devices 18 that corresponds to the state when installed on the side of the road. A "top" thus corresponds to the side facing away from the surface of the earth when installed, and a "front" to the side of the curb facing the road. Figure 2 shows a base body 34 of a curbstone or kerbstone loading device 18. This consists of concrete or a plastic that can contain fiber reinforcements. This base body 34 has a base 36 from which a total of two side walls 38, a front wall 40 and a rear wall 42 extend upwards. The side walls 38 are located at the two ends of the curbstone or kerbstone loading device 18, viewed in the longitudinal direction, so that neighboring curbstone or kerbstone loading devices 18 rest against one another with these side walls 38. The front wall 40 delimits the curbstone or kerbstone loading device 18 towards the street.

Behind the front wall 40, whose outer wall surface 44 laterally delimits the travel path 19, between the two side walls 38 and in front of the rear wall 42, a receiving space 46 delimited by these walls is formed in the base body 34, in which a charging unit 48 is arranged, the electronic unit of which can be arranged in an encapsulated electronics box which is supplied with power via the power supply cable 22 and which has a power output via which a connection is made to the charging socket 24. The power supply cable 22 protrudes through an opening (not shown) in the base 36 of the base body 34 into the receiving space 46, which can simultaneously serve as a drain opening for draining off water accumulating in the receiving space 46.

The receiving space 46 is delimited downwards and to the sides by an inner wall surface 50 of the front wall 40, the floor 36 and inner wall surfaces 52 of the side walls 38. In the present exemplary embodiment, the base body 34 is made of reinforced concrete and accordingly contains reinforcing bars 54, 56, 58 made of steel. A total of five reinforcing bars 54 are U-shaped and extend accordingly from above through an upper side 60 of the front wall 40 and through the front wall 40 to the floor 36, where a first 90° bend 62 is formed. The U-shaped reinforcing bars 54 further extend in the transverse direction through the floor 36 and over a further 90° bend 64 into the rear wall 42, from which ends 66 of the legs 68 of the reinforcing bar 54 protrude, as do the opposite ends 66 of the opposite leg 68 on the front wall 40. External threads 72 are formed on both ends 66 protruding over the upper side 60 of the front wall 40 and an upper side 70 of the rear wall 42. The U-shaped reinforcing bars are evenly distributed over the entire length of the receiving space 46, with the two outer reinforcing bars 54 being arranged in the region of the corners of the receiving space 46.

On the inside in the area of the two 90° bends 62, 64, further reinforcing bars 56 are located on the bends 62, 64, which extend along all U-shaped reinforcing bars 54 in the longitudinal direction of the base body 34 and are connected to the U-shaped reinforcing bars 54 in a known manner to form a reinforcing grid. Two further reinforcing bars 58 are arranged close to the upper sides 60, 70 in the longitudinal direction. These rest against the legs 68 of the U-shaped reinforcing bars 54 from the outside and are also connected to them.

The reinforcement bars 54, 56, 58 each have a distance from the outer surfaces of the surrounding concrete that corresponds to the diameter of the reinforcement bars 54, 56, 58. Accordingly, the distance of the reinforcing bars 58 to the top side 60 of the front wall 40 and to the top side 70 of the rear wall 42 is selected such that it corresponds approximately to the diameter of the reinforcing bar 58. Since the front wall 40 and the rear wall 42 are to be made as thin as possible in order to be able to provide sufficient space to accommodate a loading unit 48 in the receiving space 46, an area 74 surrounding the legs 68 of the U-shaped reinforcing bars 54 is made thicker so that semicircular ribs 76 protrude into the receiving space 46.

Furthermore, it can be seen that elevations 80 are formed on inner regions of the upper sides 60, 70 of the rear wall 42, the front wall 40 and the upper sides 78 of the side walls 38 adjacent to the receiving space 46, as well as on the regions surrounding the legs 68.

A closure cover 82 rests on these elevations 80, as can be seen in Figure 5. The closure cover 82 is, as can be seen in Figure 3, fastened via screw nuts 84, which are screwed onto the external threads 72 of the ends 66 of the legs 68 of the reinforcing bars 54, and has a corresponding hole pattern. In the outer peripheral area 86 of the closure cover 82, a profile seal 88 is stretched between the closure cover 82 and the top 60, 70, 78 of the side walls 38, the front wall 40 and the rear wall 42, surrounding the elevations 80, which surrounds the outer periphery of the closure cover 82 so that the receiving space 46 is tightly closed at the top. The closure cover 82 serves as a force transmission element 90, via which forces acting on the front wall 40 can be diverted to the rear wall 42 through the fixed connection of the closure cover 82 to both the front wall 40 and the rear wall 42. Since this is a rigid connection, tensile forces in particular that could otherwise occur on the inner wall surface 50 are also absorbed, since bending of the front wall 40 is largely excluded. The closure cover 82 can be made, for example, from a punched and formed sheet steel of approximately 3 mm thickness and can have corresponding embossings to increase stability. Viewed in the longitudinal direction, two internal threads 92 are formed in the end sections on the closure cover 82, which can either be designed as a sleeve 93 in an opening or can be introduced directly into the closure cover 82.

In Figure 4, the curb or kerbstone charging device is shown with an attached outer cover 94 through which the charging socket 24 is accessible. The outer cover 94, which can also be made from a 3 mm steel sheet by punching and forming, for example, is attached to the closure cover 82 via two screws 96, which are screwed through openings 97 into the internal threads 92.

The outer cover 94 has a front impact wall 98 which is rounded in the transition area to a straight outer surface 95 extending the walkway 10 and which covers an edge 100 between the upper side 60 of the front wall 40 and the outer wall surface 44 of the front wall 40 facing the driveway 19. This rounded impact wall 98 extends an impact edge 102 between the upper sides 78 of the side walls 38 outside the outer cover 94 and their front surfaces 104 facing the driveway 19.

This outer cover 94 is also rounded at the rear, with the downwardly extending angled wall 106 as well as the front impact wall 98 being arranged in a common plane with the adjacent outer wall surfaces 44 of the front wall 40 and a rearward-facing outer wall surface 108 of the rear wall 42. However, the ends of the impact wall 98 and the angled wall 106 are vertically spaced from the wall surfaces 44, 108 arranged as an extension of these walls 98, 106. Accordingly, the outer cover 94 does not rest on the front wall 40 or the rear wall 42, but is horizontally displaceable relative to them. Instead, the outer cover 94 rests on an intermediate cover 110 designed as a reinforcing sheet, which is clamped between the closure cover 82 and the outer cover 94 and can be made, for example, from an embossed and formed 2 mm steel sheet and can also have deformations or embossings that lead to a stiffening of the sheet.

Holes are also formed on this intermediate cover 110, which correspond to the holes 97 on the outer cover 94 and the internal threads 92 of the closure cover 82, so that the intermediate cover 110 can be screwed to the closure cover 82 in one assembly step with the outer cover 94.

If a tire of a vehicle 32 impacts on the front wall 40, the force is directed via the reinforcement and the screw fastening into the closure cover 82 and from there via the rear screw fastening to the rear wall 42 and into the ground or foundation behind it. Deformation of the front wall, which leads to undesirable tensile stresses on the rear side, is thus prevented.

As can be seen in Figures 2 to 4, the rear wall can have a greater depth in a first lower rear wall section 112, with which the rear wall projects under the walkway 10 and to which a narrower rear wall section 114 adjoins at the top, which extends horizontally against the sidewalk 10. Such a design additionally strengthens the rear wall and accordingly ensures greater absorbable forces.

Figure 6 shows an alternative embodiment of a base body 34 of a curb or kerbstone loading device 18 according to the invention. This has a total of three partition walls 116 as a force transmission element 90, which extend at an equal distance from one another from the inner wall surface 50 of the front wall 40 to an inner wall surface 51 of the rear wall 42. In the present exemplary embodiment, these are each arranged at the height of the U-shaped reinforcing bars 54 or the areas 74 surrounding them, so that the receiving space 46 is divided into a total of four areas. In order to still be able to arrange a loading unit 48 in the receiving space 46, the partition walls 116 end below the upper sides 60, 70 of the front wall 40 and the rear wall 42, so that electrical lines can still be led through below the closure cover 82 and above the partition walls 116, or an electronics box can be designed with a corresponding recess, which would be arranged at the height of the partition walls 116.

In such a design, the intermediate cover 110 and the outer cover 94 can be dispensed with and instead the closure cover 82 can simultaneously serve as a surface 95 extending the walkway 10 and thus fulfill the function of the outer cover 94. The closure cover 82 is fastened by means of internally threaded bolts 118 embedded in the concrete in the area of the side walls 38, which are either cast into the concrete like the reinforcing bars 54, 56, 58 or are subsequently fastened by gluing into corresponding holes in the concrete.

In this embodiment, the partition walls 116 prevent bending of the

Front wall 40 is prevented and forces acting on the front wall 40 are the partition walls to the rear wall and into the ground and the foundation.

It should also be mentioned that the outer cover 94 or the closure cover 82 can have more openings than the opening through which the charging socket 24 protrudes. When using a self-sufficient or partially self-sufficient curb and charging device, an electronics box is then arranged inside, which contains the necessary electronic components for charging control.

For example, openings can be provided for the display unit of an energy meter, for LEDs for checking the charge level, for transmitting and receiving units or for maintenance, but these are usually protected by covers made of shatter-proof glass or even by plastic covers.

In addition to the energy meter already mentioned, the charging unit can include a charging controller, a contactor, in particular a high-voltage contactor, a residual current circuit breaker and/or circuit breaker, a power supply unit connected to the charging controller, a residual current sensor and other electronic components.

A curb or kerb loading device constructed in this way changes the streetscape almost as little as possible and can be accommodated in narrow cities with almost no additional space required. Despite the small size, the durability is very high, as forces from an impact on the front wall of the vehicle wheels and the cover are absorbed and can be evenly diverted via the force transmission elements to the rear wall and into the ground and foundation. In particular, the tensile forces to which the base body is sensitive can be reliably absorbed or their The rigid connection prevents this from occurring. This creates a curb or kerbstone loading device with very good durability and strength while at the same time being cost-effective, as the individual elements can be manufactured inexpensively with little material expenditure.

It should be clear that the electronics can be adapted to the respective conditions, in particular the legal conditions of the countries. The charging socket can be equipped with very different lifting, folding or swiveling mechanisms. It should also be noted that the fastening of the cover as a force transmission element can also be done via cast-in threaded sleeves in the front wall and the rear wall.

Claims

P A T E N T C L A M E N T

1. Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) with a base body (34) which is made of one or more of the materials concrete, natural stone, plastic and composite material and has a receiving space (46) which is delimited by two side walls (38) delimiting the base body (34) in the longitudinal direction, a front wall (40) extending in the longitudinal direction and a rear wall (42) extending in the longitudinal direction and a base (36) of the base body (34), a closure cover (82) which covers an upper side of the receiving space (46) and areas of an upper side (78) of the side walls (38) of the base body (34), an upper side (60) of the front wall (40) and an upper side (70) of the rear wall (42) adjacent to the upper side of the receiving space (46), and a charging unit (48) which is arranged in the receiving space (46), characterized in that the front wall (40) is firmly connected to the rear wall (42) via at least one force transmission element (90).

2. Curb or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to claim 1, characterized in that reinforcing bars (54, 56, 58) are cast into the base body (34). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 2, characterized in that a plurality of reinforcing bars (54) are U-shaped and extend from the front wall (40) in a first 90° bend (62) into the floor (36) and via a second 90° bend (64) into the rear wall (42). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 2 or 3, characterized in that a plurality of reinforcing bars (56, 58) extending in the longitudinal direction of the base body (34) are arranged in the base body (34). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to claim 4, characterized in that two of the longitudinally extending reinforcing bars (56) are arranged in the region of the arches (62, 64) of the U-shaped reinforcing bars (54) and are fastened to the U-shaped reinforcing bars (54) and one of the longitudinally extending reinforcing bars (58) is arranged in an upper quarter of the front wall (40) and the rear wall (42) and is fastened to the legs (68) of the U-shaped reinforcing bars (54). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 4, characterized in that the front wall (40) and the rear wall (42) have a greater wall thickness in the area (74) surrounding the reinforcing bars (54) than in the other areas. Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of the preceding claims, characterized in that the closure cover (82) serves as a force transmission element (90) and is non-positively attached to the front wall (40) and the rear wall (42) via a screw attachment. Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that the closure cover (82) serves as a force transmission element (90) and is positively secured to the front wall (40) and the rear wall (42). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to claim 7, characterized in that the reinforcing rods (54) protrude from the upper sides (60, 70) of the rear wall (42) and the front wall (40) and have an external thread on their ends (66) protruding from the base body (34). via which the closure cover (82) is fastened by means of screw nuts (84). Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 7, characterized in that threaded bolts or threaded sleeves are fastened in the front wall (40) and the rear wall (42), via which the closure cover (82) is fastened to the base body (34). Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 10, characterized in that the threaded bolts or threaded sleeves are cast in the base body (34). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to claim 10 or 11, characterized in that the threaded bolts with their external thread protrude from the top side (60, 70) of the front wall (40) and the rear wall (42). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 7 to 12, characterized in that the closure cover (82) in the outer peripheral region (86) with the interposition of a circumferential profile seal (88) on the top side (60, 70, 78) of the front wall (40), the rear wall (42) and the side walls (38) and, in an area further inward to the profile seal (88), rests on elevations (80) which are formed on the upper side (60, 70) of the front wall (40) and the rear wall (42).

14. Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 7 or 9 to 12, characterized in that the closure cover (82) and the screw fastening are covered by an outer cover (94) forming an extension of the sidewalk (10).

15. Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 14, characterized in that the outer cover (94) in the installed state completely covers edges (100) between the upper side (60) and the outwardly facing wall surface (44) of the front wall (40) and the outwardly facing wall surface (108) and the upper side (70) of the rear wall (42).

16. Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to claim 15, characterized in that the outer cover (94) is fastened to the closure cover (82) with the interposition of an intermediate cover (110). Curb or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 16, characterized in that two internal threads (92) are formed on the closure cover (82), via which the outer cover (94) is fastened to the closure cover (82) by means of screws (96) with the intermediate cover (110) in between. Curb or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of the preceding claims, characterized in that the base body (34) has a first rear wall section (112) which extends from the bottom (36) of the base body (34) over a quarter to three quarters of the height of the base body (34) upwards in the direction of the closure cover (82) with a thicker wall thickness than in the second rear wall section (114) adjoining it at the top. Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 1 to 6, characterized in that the power transmission element (90) is formed by partition walls (116) of the base body (34) which extend in the receiving space (46) from the front wall (40) to the rear wall (42). Curbstone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to claim 19, characterized in that the partition walls (116) end below the upper sides (60, 70) of the front wall (40) and the rear wall (42). Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 19 or 20, characterized in that the partition walls (116) each extend between the legs (68) of a U-shaped reinforcing bar (54). Curb or kerb charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 19 to 21, characterized in that the closure cover (82) has an outer surface (95) forming the walkway (10) and is fastened to the base body (34) via internally threaded bolts (118) embedded in the region of the side walls (38).