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

Description

[0001] The invention relates to a curb or kerb charging device for charging an energy storage device of an electrically powered vehicle, comprising a base element made of one or more of the materials concrete, natural stone, plastic and composite material, and having a receiving space, and a reinforcing element attached to the base element which at least partially limits the receiving space on at least one side, and a charging unit arranged in the receiving space.

[0002] These curb or kerb charging devices are charging stations integrated into the curb or kerb, to which vehicles can be connected via an electrical connection to recharge their energy storage systems or batteries. This applies particularly to purely electric vehicles, but also to hybrid vehicles. Rechargeable vehicles can include passenger cars, trucks, motorcycles, or electric bicycles.

[0003] Due to the new legislation, the increasing interest of the population in climate protection, and the improved economic viability of electrified vehicles, it is expected that the proportion of electric vehicles will increase dramatically, especially in inner-city areas. Therefore, the available charging infrastructure must be expanded significantly, meaning that some existing parking spaces must be equipped with appropriate charging facilities to ensure individual mobility in the future.

[0004] Known concepts for this include using streetlights, installing additional charging stations, or installing wallboxes on building walls. All of these concepts require additional space and cause pedestrians to be disturbed by the charging cables.

[0005] 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 disrupt the visual appearance. Instead, no additional space is required; existing infrastructure is simply utilized. High flexibility and retrofitting are possible thanks to potential modularity. Damage to the charging infrastructure from vehicle accidents can also be prevented.

[0006] Accordingly, German patent DE 10 2017 218 947 A1 proposes installing a charging device for charging vehicles in the curb of a road boundary. The curb is either equipped with an energy supply or has its own energy storage unit.

[0007] From GB 2 597 742 A a curb-loading device is known in which the energy supply line is protected in a separate tubular element which is inserted into a curb base body.

[0008] A specific design for such a curb with integrated electronics for charging a vehicle is known from GB 2 592 186 A. This curb has a modular design and a base element into which a replaceable, non-fixed receiving container can be inserted. The components for electrically charging a vehicle battery are located in this container. The receiving container is open at the top and is closed by a lid, which forms the boundary of the base element facing the road with a sloping wall. The base element, the container, and the lid are all made of plastic.

[0009] The problem with this type of curb design is its lack of durability. When a vehicle tire hits the curb, the lid and container are shifted against the base, initially stressing the container and lid before this stress is abruptly transferred to the base. Such a curb cannot adequately withstand the tensile forces, potentially leading to severe deformation and breakage.

[0010] Furthermore, DE 696 01 306 T2 discloses a kerbstone consisting of a concrete base body, on the front of which a recess is formed in which a metal channel is arranged and which is attached to the base body by means of struts extending from the channel walls into the concrete. However, the existing metal channel cannot be used to accommodate a loading unit.

[0011] The challenge, therefore, is to provide a curb or kerb charging device for charging the energy storage system of an electric vehicle. This device must be highly durable and thus suitable for widespread use as a curb in cities, parking lots, and motorway service areas, without requiring constant maintenance or frequent replacement. The electronics within the charging unit must be protected from damage, while the curb itself must retain its function as a road boundary, preventing damage to the road surface and, consequently, damage to car tires from breaking off pieces of the curb. Such a curb should be manufactured as cost-effectively as possible. Furthermore, it should offer maximum flexibility and be as simple and error-free to install as possible.The curb or kerb loading device should be easily retrofitted in prepared street sections. The electronics should be easily removable for maintenance and comply with existing standards. Furthermore, a high level of sealing against the ingress of water and dirt should be achieved.

[0012] This problem is solved by a curb or kerb charging device for charging an energy storage device of an electrically powered vehicle with the features of main claim 1.

[0013] A curb or kerb charging device according to the invention for charging the energy storage system of an electrically powered vehicle comprises a base element made of one or more of the following materials: concrete, natural stone, plastic (which may also be fiber-reinforced), and / or a composite material. Concrete naturally includes ultra-high-performance concrete (UHPC), fiber-reinforced concrete, or polymer concrete in which a plastic is used as a binder instead of cement. A receiving space is formed inside the base element. To define this space, the base element has at least a base, two side walls extending longitudinally, and a front wall extending longitudinally. The outer surface of this front wall, when installed, laterally defines a roadway or parking space, while the inner surface of the front wall faces the receiving space.When used as an edging stone, a base element can, for example, define the front boundary of a parking space. When used as a curb, the front wall extends parallel to the road, while the ends of the side walls abut an adjacent curb.

[0014] A charging unit is located in the receiving compartment. In this context, "charging unit" can refer to a simple charging socket, an inductive charger, or a completely self-contained charging unit that requires only a power connection and contains all the necessary electronic components. Of course, individual electronic components of the charging unit, such as an energy meter, charging controller, or similar devices, can also be located in the receiving compartment. Accordingly, "charging unit" refers to any single component or multiple components that can be used to charge the energy storage system of an electric or hybrid vehicle.

[0015] Furthermore, the curbstone or kerbstone loading device according to the invention has a reinforcing element that is attached to the base element and at least partially delimits the receiving space on at least one side, wherein the reinforcing element has at least one reinforcing plate which rests against the inner wall surface of the front wall and is attached to the front wall. This plate can also have stiffening ribs or be designed as an L-profile, the second leg of which projects beyond the top surface of the front wall and rests on it.

[0016] The surface of the curb or kerb loading device facing the road continues to be formed by the concrete or plastic of the base element, a design that has proven effective as a curb surface for many years. The front wall, now significantly thinner due to the receiving space, is considerably improved in its durability by the reinforcing element according to the invention. The durability and strength of the front wall facing the road are essentially maintained compared to solid curbs, since this wall is particularly sensitive to tensile forces acting on the side of the front wall facing the receiving space, for example, when a vehicle impacts the curb. These forces can now be absorbed by the reinforcing element and its connection to the front wall. The side walls also transfer forces from within the base element to the foundation, resulting in significantly increased stability of the base element.

[0017] The terms top, bottom, front wall, back wall, upper side, floor, side walls and similar always refer to the curb or kerbstone in its installed state on the road with its corresponding orientation.

[0018] Preferably, a cover made of metal, fiber-reinforced plastic, or another composite material covers an open side of the receiving chamber, an area adjacent to the open side of the receiving chamber, the upper surface of the side walls of the base element, and the upper surface of the front wall defining the receiving chamber. This at least three-sided support of the cover allows loads, for example from vehicle tires, to be absorbed and distributed evenly into the curb. This creates a curb or kerb loading device with high strength, since even forces applied over small areas can always be distributed across the curb via several surfaces connected to the foundation. The cover is advantageously attached to the base element with screws. This reliably prevents relative movement of the cover to the base element. Furthermore, it allows for the replacement of electronics within the receiving chamber.Accordingly, an additional rigid connection is created between the cover and the base element, preventing relative movement and ensuring that force is always distributed across the entire curb or kerb charging device. The cover is typically made of steel or stainless steel. It may feature a viewing window or opening, as well as other openings, for example, to display an energy meter reading or to provide access to the charging socket. Additionally, the forces are directed downwards by the reinforcing element and its mounting surfaces.

[0019] In a preferred embodiment, the reinforcing element extends at least 20 mm from at least one upper surface of the inner wall of the front wall towards the bottom along the inner wall surface. Such a reinforcing element in the upper region of the curb or kerb loading device has proven sufficient to provide the necessary strength. At the same time, the costs are significantly reduced compared to solid steel containers. The fact that the reinforcing element extends at least from the upper surface means that it can also extend beyond this upper surface towards the lid, which is particularly the case when a damping element in the form of an elastomer layer is arranged between the lid and the upper surface of the front wall.

[0020] It is particularly preferred if the reinforcing element rests against a shoulder formed on the inner wall surface of the front wall, which forms a contact surface facing the lid. This allows external forces from the lid side, acting downwards on the reinforcing element, to be transferred, and also provides additional fixation of the reinforcing element in the direction of the acting gravitational force, thus reducing the shear forces that the fastening means have to absorb.

[0021] In an alternative design, the reinforcing element extends at least from the top of the inner wall surface of the front wall down to the floor along the inner wall surface. In this design, the forces acting from above can be absorbed or transferred into the floor.

[0022] Preferably, the reinforcing element comprises the reinforcing plate and two side plates extending from the ends of the reinforcing plate along an inner surface of the side walls. Accordingly, the reinforcing element has a U-shaped cross-section. This allows additional forces introduced into the front wall to be absorbed by the side plates, further increasing the stability of the curb or kerb loading device.

[0023] In a further embodiment of the invention, a rear wall plate extends from the ends of the side plates parallel to the reinforcement plate. The two side plates are connected to each other at their ends opposite the reinforcement plate via this rear wall plate, thus forming a circumferential reinforcement ring. This increases the stability of the reinforcement element and, consequently, the stability of the curb or kerb loading device. Furthermore, the rear wall plate serves as a boundary for the receiving area to the rear, preventing the ingress of water or soil from that direction.

[0024] Advantageously, flange-like extensions from the side plates reach into corresponding recesses in the side walls of the base element, through which the cover is attached by means of screws. This allows for a simple, force-fit connection between the reinforcing element and the cover.

[0025] Preferably, the reinforcing element is attached to the base element by gluing or screwing. In particular, gluing is carried out over a large area across the adjacent inner wall surface of the front wall and, if necessary, the inner wall surfaces of the side walls. This ensures a large contact area and a large distribution of forces, which also improves strength. For screw fastening, threaded sleeves can be cast into the base element, for example. These can be anchored in both the side walls and the front wall and also serve to distribute and dissipate forces.

[0026] In an alternative embodiment, the reinforcing element is attached by struts that project into the base element. In this embodiment, the struts of the reinforcing element are encased in the concrete or plastic of the base element of the kerbstone or curbstone, similar to steel reinforcement. This also creates a firm connection to the base element.

[0027] The receiving area is preferably limited by a rear wall made of metal, plastic, or composite material, which is attached to cutouts in the rear surfaces of the side walls and, if necessary, to the floor, for example by gluing or screwing. In this way, the receiving area of ​​the curb or kerbstone is closed off at the rear towards the sidewalk, thus preventing the ingress of dirt, soil, or sand from behind.

[0028] Furthermore, it is advantageous if the base element has a rear wall section that extends upwards from the bottom of the base element towards the lid, covering one-quarter to three-quarters of its height. This allows the receiving area of ​​the curbstone or kerbstone loading device to be partially enclosed by the rear wall section, eliminating the need for an additional metal back panel. Instead, the receiving area is closed off at the rear by the rear wall section of the base element and the back panel of the reinforcement element. This increases rigidity and reduces manufacturing costs.

[0029] In a further embodiment, the rear wall section of the base element extends below a sidewalk surface when installed. Thus, the depth of the receiving space is maintained by the rear wall section of the base element without affecting the visible depth of the curb when installed.

[0030] In a further development, the rear wall section of the base element partially defines the receiving space, and the rear wall panel of the reinforcement element has a contact section with which the rear wall panel abuts an inner wall surface of the rear wall section. Here, the rear wall panel can be attached accordingly, in particular by gluing, so that a sealed receiving space is created.

[0031] Preferably, the cover completely covers an edge formed in the installed state between the top and the outer wall surface of the front wall, at least along the longitudinal extent of the receiving space, thereby protecting the sensitive edge where an impact from a vehicle tire is to be expected.

[0032] In a further embodiment of the invention, the cover has a rounded impact wall which, when installed, covers the base element at the transition between the top of the front wall and the outer surface of the front wall. This rounding prevents damage to the vehicle tire. Furthermore, the arrangement of the cover's impact wall in the transition area between the top and the outer surface of the curb's front wall facing the road ensures that, regardless of vehicle size and therefore tire size, any initial contact, whether from the side or from above, is always reliably absorbed by the cover and dissipated over a large area.

[0033] The cover is advantageously positioned against the front wall, side walls, and / or the reinforcing element with an interlayer of seal or elastomer. This ensures a more even distribution and damping of the forces applied to the side walls and front wall of the base element when the cover deflects. The seal prevents the ingress of water or dirt and can be attached to the cover, the base element, or the reinforcing element.

[0034] It is also advantageous if an opening is formed in the base of the base element through which a power supply cable protrudes into the recording compartment to an electronic unit or a charging socket. This ensures good accessibility to the power connection in the recording compartment.

[0035] Furthermore, a drainage opening is preferably provided at the bottom of the base element, through which water can be drained from the receiving chamber. This opening can also serve as an opening for the power supply cable. Water entering the receiving chamber, as well as condensate formed on a charging unit, cannot accumulate there but is reliably drained away.

[0036] The reinforcing element is preferably made of metal or fiber-reinforced plastic. It can be a sheet or steel plate, with profiles or L-shapes, which can also be made of a different metal. These are particularly suitable for reliably absorbing and dissipating the tensile forces occurring on the back of the front panel.

[0037] This provides a curb or kerb charging device for charging the energy storage system of an electric vehicle. It offers high strength and durability at reduced cost, thus preventing damage to curbs and kerbs while simultaneously protecting the electronics. Furthermore, the curb or kerb charging devices according to the invention are flexible and modular in design, yet very easy to install. The necessary excavation work for installation is minimized, as is the number of assembly steps required to implement a system that can be used, for example, to build a smart city with networks, charging stations, and metering systems. The cityscape remains unchanged. Space is not lost, and tripping hazards from cables on sidewalks are avoided.

[0038] Three 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.

[0039] The Figure 1 shows a schematic diagram of a road with a bordering curb or kerb loading device in top view.

[0040] The Figure 2 shows a perspective view of a first embodiment of a base element with a reinforcing element of a curb or kerb loading device according to the invention.

[0041] The Figure 3 shows a perspective view of a second embodiment of a base element with reinforcement element of a curb or kerb loading device according to the invention without electronics.

[0042] The Figure 4shows a longitudinal section through a curbstone or kerbstone loading device according to the invention, with the base element and the reinforcement element as shown in the Figure 3 in perspective.

[0043] The Figure 5 shows a perspective view of a third embodiment of a base element with a reinforcing element of a curb or kerb loading device according to the invention.

[0044] The Figure 6 shows a cross-section of the curb-loading devices according to the invention in the area of ​​the lid screw connection.

[0045] In Figure 1A sidewalk 10 is shown, bordered on one side by a house wall 12 and on the other side by a curb 14, which is formed by several stone elements 16 and curb charging devices 18 according to the invention and forms a boundary to a roadway 19 in the form of a street. On the side of the sidewalk 10 facing away from the roadway 19, there is a power source 20 in the form of a power connection connected to the power grid. The power source 20 is connected to the curb charging devices 18 via underground power supply cables 22. Charging sockets 24 are arranged on the curb charging devices 18, into which plugs 26 are inserted. These plugs are each connected via cables 28 to an energy storage device 30, in particular a battery of an electric vehicle 32, so that this energy storage device 30 can be charged via the power source 20.

[0046] Curb or kerb loading devices 18 according to the invention are in the Figures 2 to 5 As shown. In the following, the terms "top", "bottom", "below", "above" or similar refer to the state of the curb or kerb loading devices 18 as installed at the roadside. A "top" thus corresponds to the side facing away from the ground surface when installed, and a "front" to the side of the curb facing the road.

[0047] The curb or kerb loading device 18 according to Figure 2The device consists of a base element 34, which is made of concrete or plastic and may contain fiber reinforcements. This base element 34 has a base 36 from which two side walls 38 and a front wall 40 extend upwards. The side walls 38 are located at both ends of the curb or kerb loading device 18 in the longitudinal direction, so that adjacent curb or kerb loading devices 18 abut each other with these side walls 38. The front wall 40 forms the boundary of the curb or kerb loading device 18 facing the road.

[0048] Behind this front wall 40, whose outer wall surface 41 laterally limits the driving path 19, and between the two side walls 38, a receiving space 42 is formed on the base element 34, in which, as in Figure 4As shown, a charging unit 44 is arranged, the electronic unit 46 of which is located in an encapsulated electronic box 48. This electronic box is powered via the power supply cable 22 and has a power output through which a connection to the charging socket 24 is established. The power supply cable 22 protrudes through an opening 50 in the base 36 of the base element 34 into the receiving chamber 42, which simultaneously serves as a drain opening 52 for the removal of water accumulating in the receiving chamber 42.

[0049] The receiving chamber 42 is bounded downwards and laterally by an inner wall surface 54 of the front wall 40, the floor 36, and inner wall surfaces 56 of the side walls 38. A cover 58, which is preferably made of steel, is attached to the base element 34 by screws 60 and closes an upward-facing open side of the receiving chamber 42. The cover 58 rests on an upper surface 62 of the front wall 40 of the base element 34 and extends beyond the ends of the receiving chamber 42 in the longitudinal direction, so that it also rests laterally on a section of the upper surfaces 64 of the side walls 38 facing the receiving chamber 42. Between the upper surfaces 62, 64 of the side walls 38 and the front wall 40, and the cover 58, as shown in Figure 6It can be seen that an elastomer layer 66 and / or a seal is arranged, via which impacts on the cover 58 and resulting bending of the cover 58 are dampened and uniformly introduced into the base element 34, and the ingress of water and dirt can be prevented.

[0050] The cover 58 has a rounded impact wall 68, which covers an edge between the upper surface 62 of the front wall 40 and the outer wall surface 41 of the front wall 40 of the side wall 40 facing the roadway 19. This rounded impact wall 68 extends an impact edge 70 between the upper surfaces 64 of the side walls 38 and their front surfaces 72 facing the road.

[0051] The cover 58 is fastened by means of two screws 60, which, viewed in the longitudinal direction, protrude through corresponding holes at the ends of the cover 58. The screws 60 are screwed into an internal thread of an insert, which in the exemplary embodiment according to the Figure 2 are cast into the base element 34 in the section of the side walls 38 located towards the recording room 42.

[0052] According to the invention, in the execution according to Figure 2 A reinforcing element 74 is attached to the inner wall surface 54 of the front wall 40 facing the receiving chamber 42. In the exemplary embodiment, this element consists of the following: Figure 2consisting solely of a reinforcement plate 76, which is made of metal in particular, and extends vertically from just above a top surface 78 of the inner wall surface 54 of the front wall 40 at least 20 mm towards the floor 36 and up to a step 80 on the inner wall surface 54, which forms a contact surface 82 against which the reinforcement plate 76 rests, and horizontally over the entire length of the receiving space 42.

[0053] The reinforcement plate 76 is glued as completely as possible onto the inner wall surface 54 of the front wall 40 of the base element 34 via an adhesive layer, which can consist of an epoxy resin, for example.

[0054] If the curb loading device 18 is subjected to a lateral load, for example by the tire of a truck, a force acts on the front wall 40, particularly in the direction of the receiving area 42. While the compressive forces acting on the outer wall surface 41 of the front wall 40 can be absorbed very well by the base element 34, tensile forces arise on the inner wall surface 54, to which the concrete of the front wall 40 is significantly more sensitive. These forces are now absorbed by the reinforcement plate 76 or transferred to the side walls 38 and the base 36 of the base element 34, so that sufficient overall strength is achieved.

[0055] The execution according to the Figures 3 and 4 differs from the design according to the Figure 2by the fact that the reinforcing element 74, in addition to the reinforcing plate 76, has two side plates 84 which extend along the inner wall surfaces 56 of the side walls 38 at the same height as the reinforcing plate. These side plates 84 are also attached to the inner wall surfaces 56, in particular by full-surface bonding, and abut against corresponding shoulders 80 on the inner wall surfaces 56 of the side walls 38.

[0056] Flange-shaped extensions 86 project from these side plates 84 towards the side walls 38 and engage in correspondingly shaped recesses 88, which are formed on the upper surface 64 of the side walls 38 in the area of ​​the section of the side walls 38 covered by the lid 58. Internal threads are formed in these flange-shaped extensions 86, so that the screws 60 for fastening the lid 58 can be screwed into these internal threads, thus eliminating the need for the insert.

[0057] This design of the reinforcing element 74 further increases the strength of the curb-loading device 18, since the forces acting on the front wall 40 of the curb-loading device 18 are not only absorbed by the reinforcing plate 76, but are also transferred to the area of ​​the side walls 38. Bending forces of the lid 58 can also be effectively absorbed by the existing steps 80, thus preventing excessive shear forces at the bonding surfaces.

[0058] Both in the execution according to the Figure 2 as well as in the execution according to the Figures 3 and 4 The rear of recording room 42 is closed off by a rear wall 90, which is located in the Figure 4 is depicted with a break-in and prevents soil lying behind the curb loading device from entering receiving space 42. During training according to the Figure 4This rear wall 90 can also be formed in one piece with the reinforcing element 74. The cover 58 also rests on this rear wall 90, which is also preferably made of a metal plate. The rear wall 90 can be attached by gluing, whereby the rear wall 90 is then glued to cutouts 91 on the rear surfaces 92 of the side walls 38 and the bottom 36 adjacent to the receiving chamber 42.

[0059] Another alternative embodiment of the reinforcement element 74 and the base element 34 is shown in the Figure 5As shown, in this embodiment, a rear wall section 93 is formed on the base element 34, extending approximately half the height from the base 36 towards the cover 58 and widening the base element 34 towards the sidewalk, so that this base element 34 has a greater depth than the inner wall surfaces 56 of the side walls 38 that define the receiving space 42. This rear wall section 93 is located below the paving stones of the sidewalk 10 when the curbstone loading device 18 is installed.

[0060] The reinforcement element 74 comprises, in addition to the reinforcement plate 76 and the two side plates 84, a rear wall plate 94 which runs parallel to the reinforcement plate 76 and extends from the ends of the side plates 84 between them, thus forming a closed reinforcement ring 96 with the side plates 84 and the reinforcement plate 76. This rear wall plate 94 extends to an inner wall surface 98 of the rear wall section 93 and is attached to this surface by means of a contact section 99, with which the rear wall plate 94 abuts the rear wall section 93 of the base element 34, in particular by adhesive bonding, so that the rear of the receiving space 42 is closed by the rear wall section 93 of the base element 34 and the rear wall plate 94 of the reinforcement element 74.

[0061] This design results in additional strength of the curb-loading device, as the forces are distributed onto the base element 34 by the reinforcing plate 76, the side plates 84, and the rear plate 94. Additionally, forces can also be absorbed via the flange-like extensions 86, which can also be bonded to the side walls 38.

[0062] It should also be mentioned how in Figure 4 It can be seen that the cover 58 has a total of four openings 100, 102, 104, 106. The charging socket 24 is located under the first opening 100, which is arranged in a plug receptacle 108 of the receiving space 42. This charging socket 24 is, as shown in the Figures 2 and 3 shown, closed by a socket cover 110.

[0063] The charging socket 24, as well as an energy meter 112, whose display unit 114 is located below the second opening 102 to allow the user to read the amount of electricity charged, is part of the charging unit 44, which is located in the receiving compartment 42. The power supply cable 22, which extends into the receiving compartment 42 via the opening 50, is connected to a contact terminal 118 in an electrical connection area 116 of the electronics box 48. The electrical connection area 116 is located below the third opening 104, which is closed by a maintenance cover (not shown). The fourth opening 106 is closed by a glass or plastic cover, under which a transmitter and receiver unit is located.

[0064] The charging unit may include, in addition to the aforementioned energy meter 112, a charging controller, a contactor, in particular a high-voltage contactor, a residual current circuit breaker and / or miniature circuit breaker, a power supply connected to the charging controller, a residual current sensor and other electronic components.

[0065] A curb or kerb loading device constructed in this way hardly alters the streetscape and can be installed even in narrow cities with virtually no additional space requirements. Despite its small size, it is very durable because the impact forces from vehicle wheels are absorbed by the impact edge and the steel cover, and then evenly distributed via the reinforcing element and the base element. In particular, it reliably absorbs the tensile forces to which the base element is sensitive. This results in excellent durability and strength at a low cost, as the reinforcing element is reduced to the bare minimum.

[0066] It should be clear that the electronics can be adapted to the specific circumstances, particularly the legal requirements of the respective countries. The charging socket can be equipped with a wide variety of lifting, folding, or swiveling mechanisms. The cover can also be attached in different ways. The shape of the base element can also differ from the illustrations. In particular, the height of the reinforcement element must be adjusted. The features of the illustrated designs can also be combined in various ways. The reinforcement element can be attached, for example, by screws or struts anchored in concrete.

Claims

1. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32), comprising a base element (34) which is produced from one or more of the materials concrete, natural stone, plastic and composite material and comprises a receiving space (42), a reinforcing element (74) which is fastened to the base element (34) and at least partially delimits the receiving space (42) on at least one side, and a charging unit (44) which is arranged in the receiving space (42), characterized in that the base element (34) comprises at least one bottom (36), two side walls (38) delimiting the base element (34) in the direction of longitudinal extent and a front wall (40) extending in the direction of longitudinal extent, the outer wall surface (41) of which, in the installed state, delimits a travel path (19), and the inner wall surface (54) of which faces the receiving space (42), wherein the reinforcing element (74) comprises at least one reinforcing plate (76) which bears against the inner wall surface (54) of the front wall (40) and is fastened to the front wall (40).

2. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to Claim 1, characterized in that a cover (58) made of metal or a fibre-reinforced plastic or other composite material covers an open side of the receiving space (42) and a region, adjoining the open side of the receiving space (42), of an upper side (64) of the side walls (38) of the base element (34) and an upper side (62) of the front wall (40) delimiting the receiving space (42).

3. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to Claim 1 or 2, characterized in that the reinforcing element (74) extends at least from an upper side (78) of the inner wall surface (54) of the front wall (40) at least 20 mm in the direction of the bottom (36) along the inner wall surface (54).

4. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to either of the preceding Claims 2 and 3, characterized in that the reinforcing element (74) bears against a shoulder (80) which is formed on the inner wall surface (54) of the front wall (40) and forms a bearing surface (82) facing the cover (58).

5. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to Claim 3, characterized in that the reinforcing element (74) extends at least from the upper side (78) of the inner wall surface (54) of the front wall (40) as far as the bottom (36) along the inner wall surface (54).

6. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that the reinforcing element (74) comprises the reinforcing plate (76) and two side plates (84) which extend from the ends of the reinforcing plate (76) and which extend along an inner wall surface (56) of the side walls (38).

7. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that the reinforcing element (74) is fastened in the base element (34) by adhesive bonding or screwing.

8. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of Claims 1 to 6, characterized in that the reinforcing element (74) is fastened by struts on the reinforcing element (74) which project into the base element (34).

9. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that the receiving space (42) is delimited by a rear wall (90) made of metal which is fastened to cutouts (91) on rear surfaces (92) of the side walls (38) and of the bottom (36).

10. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of Claims 2 to 9, characterized in that the base element (34) comprises a rear wall section (93) which extends upwards from the bottom (36) of the base element (34) over one third to three quarters of the height of the base element (34) in the direction of the cover (58).

11. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of Claims 2 to 10, characterized in that the cover (58) completely covers an edge, formed in the installed state between the upper side (62) and the outer wall surface (41) of the front wall (40), at least along the longitudinal extent of the receiving space (42).

12. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of Claims 2 to 11, characterized in that the cover (58) bears against the front wall (40), the side walls (38) and / or the reinforcing element (74) with the interposition of a seal or an elastomer layer (66).

13. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that an opening (50) is formed on the bottom (36) of the base element (34), through which opening an energy supply cable (22) projects into the receiving space (42) to an electronics unit (46) or a charging socket (24).

14. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that an outflow opening (52) is formed on the bottom (46) of the base element (34), through which outflow opening water can be discharged from the receiving space (42).

15. Curb or curbstone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32) according to one of the preceding claims, characterized in that the reinforcing element (74) is made of metal or a fibre-reinforced plastic.