Curb or paving stone charging device for charging an energy store of an electrically driven vehicle

Abstract

The invention relates to a curb or paving stone charging device (18) for charging an energy store (30) of an electrically driven vehicle (32), comprising a main part (34) that has, in the interior, a receiving space (36) which is closed by means of a protective cover (38); an interface unit (24); an energy supply cable (22) which projects into the receiving space (36) in the main part (34); and heat-generating electronic components (48) which are arranged in the receiving space (36) of the main part (34) and via which the interface unit (24) is connected to the energy supply cable (22). According to the invention, at least one of the heat-generating electronic components (48) rests either directly against the inner surface (90) of an outer wall (50) of the main part (34) so as to conduct heat or one or more heat conducting elements (96, 110) extend at least from the heat-generating electronic component (48) to the inner surface (90) of the outer wall (50) of the main part (34), wherein the outer surface (94) of the outer wall (50) facing away from the inner surface (90) rests against the surrounding ground (92).

Description

[0001] DESCRIPTION

[0002] Curb, paving stone or kerb charging device for charging an energy storage device of an electrically powered vehicle

[0003] The invention relates to a curbstone, paving stone or kerbstone charging device for charging an energy storage device of an electrically driven vehicle, comprising a base body having a receiving space inside which is closed by means of a protective cover, an interface unit, a power supply cable which projects into the receiving space in the base body, and heat-generating electronic components which are arranged in the receiving space of the base body and via which the interface unit is connected to the power supply cable.

[0004] Such curb, 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 particularly applies to purely electric vehicles but also hybrid vehicles. Chargeable vehicles can be passenger cars, trucks, motorcycles, or electric bicycles.

[0005] Due to the new legislation, the growing interest of the population in climate protection and 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] A special design of such a curb with electronics for charging a vehicle is known from GB 2 592 186 A. This curb has a modular design and features a base element into which a removable receptacle can be inserted. This receptacle is therefore not fixed. Wireless telecommunications technologies and infrastructures, such as Wi-Fi, Bluetooth, or parking sensors, are integrated into this receptacle. In addition, this curb features a connection socket and optional battery packs.

[0009] Also known from DE 10 2020 205 561 A1 is a curb module comprising a receiving space in a base element, which is closed by a cover element. The receiving space accommodates an inductive charging device, a status indicator visible from the outside, a receiving and transmitting unit, a buffer storage unit, and a control unit.

[0010] The problem with these curbside modules, however, is that the electronic components generate a large amount of heat, especially during vehicle charging, which leads to overheating of the interior. This increases the thermal load on the electronic components, which can lead to damage due to overheating or, if temperature monitoring is present, at least delay the charging process, as the amount of energy transferred is reduced to protect the electronic components.

[0011] The task therefore arises to provide a curb, paving stone or kerb charging device for charging an energy storage device of an electrically powered vehicle, with which the largest possible amounts of heat can be dissipated in order to prevent thermal overload of the electronic components.

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

[0013] A curbstone, paving stone, or kerbstone charging device according to the invention for charging an energy storage device of an electrically powered vehicle has a base body made from concrete, natural stone, plastic, or composite material, for example by casting. Concrete naturally also includes ultra-high-performance concrete (UHPC), fiber-reinforced concrete, or polymer concrete in which a plastic is used as a binding agent instead of cement. The base body can also be made of metal or have at least one metallic wall or a metallic receptacle that is attached to the concrete or plastic of the remaining base body. A receiving space is formed inside the base body and is bounded by the base body on several sides. The base body has, in particular, a base and three or four side walls.The receiving space is closed by a protective cover, which is placed, for example, on the upward-facing ends of the four side walls. The cover can, of course, also form one or more side walls of the receiving space. The protective cover thus both defines the space and can absorb impacts from vehicles. Furthermore, the curb, kerbstone, or paving stone charging device has an interface unit, which is, for example, mechanically connected at least indirectly to the protective cover or to the base body and can be designed as a charging socket or inductive pad. This mechanical connection can be made either directly or via lifting or pivoting mechanisms or via additional parts.A power supply cable extends into the receiving space of the base body and is connected to the interface unit via electronic components of a charging unit, which is attached, for example, to the protective cover but can also be attached to the base body. These components of a charging unit can form a completely self-contained charging unit, which requires only a power connection and contains all electronic components, or they can be present individually and serve in some way to control or protect the interface unit and the charging process. Accordingly, individual electronic components of the charging unit, such as an energy meter, charging controller, a power contactor, or a transmitting and receiving unit for authentication, can also be arranged in the receiving space.Components of the charging unit are therefore understood to be individual components or multiple components that can be used to charge the energy storage unit of the electric vehicle or hybrid vehicle. Some of these components are heat-generating electronic components, such as a contactor, a power supply, or a charging controller. At least one of these heat-generating electronic components is arranged in the receiving space of the base body and at least indirectly connects the interface unit to the power supply cable.

[0014] According to the invention, at least one of the heat-generating electronic components rests in a heat-conducting manner either directly against an inner wall surface of an outer wall of the base body, or one or more heat-conducting bodies extend at least from the heat-generating electronic component to the inner wall surface of the outer wall of the base body, wherein an outer wall surface of the outer wall facing away from the inner wall surface rests against the surrounding soil or foundation. The heat-conducting bodies serve to improve heat conduction to this inner wall surface. They can be either one or more bodies that have at least one solid component with a heat conduction that lies at least above that of the housing or a wall surface of the electronic component to be connected. The support is particularly large-area in order to create a large thermal contact surface, which likewise improves heat conduction.An outer wall surface facing away from the inner wall surface rests against the surrounding soil. This surrounding soil, which can also be formed by a concrete foundation or similar, has a lower temperature than the surrounding air, especially at critical outside air temperatures, so it can serve as a heat sink. Accordingly, the heat-generating electronic components are located either indirectly or directly on the ground or on the rear wall of the base body.

[0015] In this way, the heat generated by the electronic components is dissipated either directly or indirectly into the ground. This significantly reduces the thermal load on the electronic components in the charging chamber, which can significantly stabilize the charging performance, as charging times can be shortened with reduced energy transfer. Furthermore, the service life of the charging unit's electronic components is increased, allowing maintenance intervals to be extended.

[0016] Preferably, all heat-generating electronic components are either directly in contact with the inner wall surface of the outer wall of the base body, or one or more heat-conducting elements extend at least from the heat-generating electronic components to the inner wall surface of the outer wall of the base body, with the outer wall surfaces of the outer walls facing away from the inner wall surfaces abutting against the surrounding soil. Accordingly, the heat from all heat-generating electronic components can be dissipated into the soil, thus increasing their service life and accelerating the charging process, since larger amounts of energy can be transferred per unit of time.

[0017] Furthermore, it is advantageous if the at least one heat-generating electronic component is arranged in an electronics box and, in a heat-conducting manner, either lies directly against a wall delimiting the electronics box or the heat-conducting body extends at least from the heat-generating electronic component to the wall delimiting the electronics box, which wall either lies directly against an inner wall surface of an outer wall of the base body or the heat-conducting body or an additional heat-conducting body extends at least from the wall delimiting the electronics box to the inner wall surface of the outer wall of the base body, wherein an outer wall surface of the outer wall facing away from the inner wall surface lies against the surrounding ground.Such an electronics box can be designed in an encapsulated manner, reliably protecting the electronic components from water and dirt ingress. It can be attached to the protective cover, for example, or formed as a single piece with it. This also significantly simplifies the installation and replacement of the entire electronics.

[0018] In a further advantageous embodiment, the heat-generating electronic component is attached to the wall surrounding the electronics box or the outer wall of the base body, where it rests flat against the wall. This flat contact creates a large surface area for heat transfer to the wall of the electronics box or the housing, which also improves heat conduction to the outside.

[0019] It is particularly preferred if a thermal paste or thermal pad is arranged as a heat-conducting element between the heat-generating electronic component and the wall surrounding the electronics box or the outer wall of the base body. These thermal pastes and thermal pads adapt to the adjacent surfaces, so that air acting as an insulator is completely displaced between the electronic component and the opposite wall, thus significantly improving heat conduction to the outside. Typical thermal pads or thermal pastes have a thermal conductivity of approximately 1 to 16 mK.

[0020] Furthermore, it is advantageous if a flexible or rigid body with a thermal conductivity greater than 12 is arranged as a heat conducting body between the heat-generating electronic component and the wall defining the electronics box or the outer wall of the base body. This can be a block made of aluminum or an aluminum alloy, for example. This allows the electronic component to be arranged as freely as possible in the electronics box or the receiving space, while still ensuring good heat conduction to the outside into the ground. In an alternative embodiment, a Peltier element is arranged as a heat conducting body between the heat-generating electronic component and the wall defining the electronics box or the outer wall of the base body, the cold side of which rests against the heat-generating electronic component and the warm side of which rests against the wall defining the electronics box or the outer wall of the base body.Since the curb, paving stone, or kerb charging device already includes a power connection, the electronic component can also be actively cooled by applying current to the Peltier element. This allows for active cooling control.

[0021] In an alternative embodiment of the invention, at least one heat pipe is arranged as a heat-conducting element between the heat-generating electronic component and the wall defining the electronics box or the outer wall of the base body. This heat pipe extends from the heat-generating electronic component to the wall defining the electronics box or to the outer wall of the base body. The fluid present in the heat pipe also allows for reliable heat dissipation.

[0022] When using an electronics box, it is advantageous if the wall bordering the electronics box lies directly against the outer wall of the base body, thereby ensuring direct heat transfer from the wall of the electronics box to the outer wall of the base body of the charging device.

[0023] In order to further improve the heat transfer between the electronics box and the base body and thus the ground and to avoid insulation by air, a thermal paste, a thermal pad, a graphite foil or a spring plate extends as a heat conducting body between the wall bordering the electronics box and the outer wall of the base body.

[0024] Alternatively, a Peltier element can be arranged as a heat-conducting element between the electronics box and the outer wall of the base body, with its cold side resting against the electronics box and its warm side resting against the outer wall of the base body. This allows large amounts of heat to be dissipated from the electronics box and, if desired, also allows for temperature control.

[0025] Furthermore, ribs can be formed as heat-conducting elements between the wall surrounding the electronics box and the outer wall, or a metal foam can be arranged between the wall surrounding the electronics box and the outer wall of the base body. This increases the surface area of ​​the electronics box available for heat transfer and thus also leads to improved heat dissipation.

[0026] The use of a heat pipe as a heat conducting element works particularly well when at least one heat pipe extends from the wall surrounding the electronics box through the outer wall of the base body into the ground. This creates higher thermal gradients between the ends of the heat pipe, leading to greater heat flow within the heat pipe and thus improved heat dissipation into the ground. Furthermore, a heat pipe arranged in this way can also be used for heating in winter when the outside air temperature is lower than that of the ground.

[0027] Preferably, ribs or metal foams are formed on the housing of the heat-generating electronic component, which improve heat dissipation from the electronic component itself. In a preferred embodiment, the electronics box is made of a Material whose thermal conductivity is greater than 12 and serves as a heat conductor, so that the heat conduction from the electronics box is improved and it does not have an insulating effect.

[0028] This creates a completely self-contained, paving-stone, or curb charging device for charging the energy storage unit of an electrically powered vehicle. It is completely self-sufficient and requires only a connection to a particularly easy-to-install power supply cable. This charging device is insensitive to thermal influences, as the heat from the electronic components is reliably dissipated into the ground. This extends the service life of the electronic components and allows the charging process to be carried out with larger amounts of energy, as throttling of the transferred energy due to fears of overheating can be reduced. Accordingly, shorter charging times can be achieved.

[0029] A non-limiting embodiment of a curb, paving stone or kerb charging device according to the invention for charging an energy storage device of an electrically driven vehicle is described below with reference to the figures.

[0030] Figure 1 shows a schematic diagram of a road with a limiting curb loading device according to the invention in plan view.

[0031] Figure 2 shows a perspective side view of a curbstone, paving stone or kerbstone according to the invention.

[0032] Loading device with open side cover. Figure 3 shows a schematic cross-sectional view of a curbstone, paving stone, or kerbstone loading device according to the invention in a first embodiment.

[0033] Figure 4 shows a schematic cross-sectional view of a curbstone, paving stone or kerbstone loading device according to the invention in a second embodiment.

[0034] Figure 5 shows a schematic cross-sectional view of a curbstone, paving stone or kerbstone loading device according to the invention in a third embodiment.

[0035] Figure 6 shows a schematic cross-sectional view of a curbstone, paving stone or kerbstone loading device according to the invention in a fourth embodiment.

[0036] Figure 7 shows a schematic cross-sectional view of a curbstone, paving stone or kerbstone loading device according to the invention in a fifth embodiment.

[0037] Figure 1 shows a sidewalk 10, 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 10 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 charging devices 18 via underground power supply cables 22. Interface units 24 in the form of charging sockets are arranged on the curb charging devices 18, into which a plug 26 is inserted. This plug 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.

[0038] The curbstone, paving stone or kerbstone loading device 18 consists of a base body 34 made of concrete or plastic, which may contain reinforcements, and a receiving space 36 formed in the base body 34, which is essentially hollow cuboid-shaped and is closed by a protective cover 38 on a side open to the surface of the sidewalk 10.

[0039] The protective cover 38, which is made in particular of steel, is attached to the base body 34 and / or to an internally arranged receiving container 40, which may form part of the base body 34, and closes the upwardly facing, open side of the receiving space 36, in particular with the interposition of a seal, which is not shown. The protective cover 38 rests accordingly on an upper side of the base body 34 and, viewed in the longitudinal direction, extends beyond the ends of the receiving space 36.

[0040] The protective cover 38 has a rounded impact wall 42, which covers an edge between the upper side of the base body 34 and a side surface of the base body 34 facing the street. The protective cover 38 can be attached using screws 44. The protective cover 38 accordingly limits the receiving space 36 formed inside the base body 34 at the top.

[0041] As can be seen in Figure 2, an additional dust- and liquid-tight electronics box 46 is arranged inside the receiving space 36. Heat-generating electronic components 48 are arranged inside the electronics box. The electronics box 46 can be attached to the protective cover 38 or can be formed integrally with it. The dust- and liquid-tight electronics box 46 is somewhat narrower on a first side, so that a first free space is created between the receiving space 36 and the dust- and liquid-tight electronics box 46. This first free space faces the street 19, but could also face the sidewalk 10, and through which the power supply cable 22 is routed from below.This is pulled through a hole (not visible) in a base of the base body 34 from below through an outer wall 50 delimiting the base body 34 at the base into the receiving space 40 and is guided upwards and to the side into a second free space between the protective cover 38 and a boundary wall 51 delimiting the dust- and liquid-tight electronics box 46 in the direction of the protective cover 38, which boundary wall 51 has a corresponding distance from the protective cover 38 in this section and in the adjoining section is arranged directly opposite the protective cover 38 and is fastened to it by means of screws.

[0042] On a wall 52 of the dust- and liquid-tight electronics box 46 that vertically delimits the second free space, a first opening 54 is formed through which a connection contact 56 extends, to which the power supply cable 22 is connected and which can be designed as a terminal or connector socket. The connection contact 56 is sealed in the first opening 54 so that no liquid, dust, or other contaminants can penetrate. This connection contact 56 supplies power to the electronic components 48 inside the dust- and liquid-tight electronics box 46 and thus also to the interface unit 24, which, as shown in Figure 2, is arranged outside the electronics box 46, so that a second opening 58 serves for the sealed passage of an electrical line to the interface unit 24.

[0043] On the vertical wall 57 opposite the vertically defining wall 52, a third opening 59 is formed on the dust- and liquid-tight electronics box 46, in which a pressure equalization membrane 60 is placed, through which air can enter and exit the electronics box 46, whereby a pressure difference between the interior and the exterior of the dust- and liquid-tight electronics box 46 can be equalized, so that no liquid can penetrate due to existing pressure differences.

[0044] Power cables 61 extending from the connection contact 56 lead to a combined residual current device and circuit breaker 62, which can also be implemented as individual switches. This is located directly below the boundary wall 50 and can be actuated or reset from the first free space.

[0045] This residual current and circuit breaker 62 is connected to an energy meter 64, which is connected to the interface unit 24 via further power cables (not shown) with the interposition of a power contactor 66, whereby the latter is indirectly connected to the power supply cable 22.

[0046] The energy meter 64 is arranged below a viewing window 68 in the protective cover 38, through which a display unit of the energy meter 64 can be read.

[0047] Further on, a power supply 70 is supplied with power via a line with a line fuse. This power supply 70 is located on the floor of the electronics box 46 and converts the applied high-voltage voltage into a low-voltage voltage, in particular a 12V voltage. The power supply 70 supplies power to a charging controller 72, which is located directly next to the power supply 70 and which controls and regulates the charging process. This charging controller 72 switches the power contactor 66, which is also located on the floor of the electronics box 46.Before switching the power contactor 66 via the charging controller 72, in this embodiment with charging socket, a locking actuator 74 of the interface unit 24 must be switched and, beforehand, the user must be authenticated via an RFID board 76, which is arranged directly below a viewing window 78 in the protective cover 38, so that visualization of the authentication via LEDs of the RFID board 76 is possible.

[0048] A residual current sensor 80 is connected between the power contactor 66 and the energy meter 64. This sensor detects any direct currents potentially triggered by a vehicle-mounted charger between the power contactor 66 and the energy meter 64 and prevents alternating fault currents from being reliably detected by the residual current device 62, which could lead to personal injury. Accordingly, in this case, the power supply via the charging controller 72 is interrupted.

[0049] Furthermore, a transmitting and receiving unit 84, which can be designed as a radio antenna, is arranged in a plastic part 82 of the protective cover 38, the connecting cable of which leads to the charging control 72 in the electronics box 46 via a further sealed opening.

[0050] If a vehicle is to be charged, the user is first identified via the RFID board 76 and the transmitting and receiving unit 84. After the plug 26 has been inserted, the locking actuator 74 is switched before the charging process begins, preventing accidental removal of the plug 26 during the charging process, as this would endanger the user. Only after the locking actuator 74 has been switched is the power contactor 66 switched via the charging controller 72, so that the charging process can begin. The energy meter 64 has a data interface in the form of a ModBus to the charging controller 72, so that the data from the energy meter 64 is transmitted to the charging controller 72 during the charging process and is terminated upon completion of the charging process due to an external command or the detection of a full charge of the energy storage device 30.

[0051] In this embodiment, the heat-generating electronic components 48, in particular the charging controller 72, the power supply unit 70, the power contactor 66 and the residual current and circuit breaker 62, are located over a large area on a wall 86 facing the sidewalk 10 and delimiting the electronics box 46, which is largely cut away in Figure 2, and the power contactor 66 and the power supply unit 70 are additionally located on a wall 88 delimiting the electronics box 46 to the ground.The wall 86 facing the sidewalk 10 and delimiting the electronics box 46 and the delimiting wall 88 of the electronics box 46 forming the floor lie against an inner wall surface 90 of the rear lateral outer wall 50 facing the surrounding soil 92 and the outer wall 50 of the base body 34 forming the floor, so that the heat can be dissipated via the walls 86, 88 of the electronics box 46 and the outer walls 50 of the base body 34 to the soil 92 behind or below it via an outer wall surface 94 of the outer wall 50. In order to ensure good heat conduction from the electronics box 46 to the outer wall 50 of the base body 34, the electronics box 46 is made of aluminum, for example, and has a. Thermal conductivity of over 200 Due to this design of the electronics box 46, it serves as a heat-conducting body 96 from the heat-generating electronic components 48 to the outer walls 50 of the base body 34 opposite the ground 92, from where the heat can in turn be dissipated into the ground 92. Figures 3 to 7 schematically illustrate further alternatives for heat dissipation from the heat-generating electronic components 48 to the ground 92.

[0052] In Figure 3, the heat-generating component 48 shown lies directly against the inner wall surface 90 of the outer wall 50 of the base body 34. Accordingly, an additional electronics box 46 is omitted in this embodiment.

[0053] In Figure 4, a thermally conductive paste or thermally conductive pad 98 is arranged as a heat-conducting body 96 between the heat-generating electronic components 48 and the inner wall surfaces 90 of the lateral and lower outer walls 50 of the base body 34, opposite the ground 92. This fills small, insulating air cushions between the inner wall surface 90 and the electronic component 48, thus further improving heat dissipation.

[0054] A further alternative embodiment is shown in Figure 5. Here, to improve heat dissipation from the electronic component 48, ribs 100 are formed on a housing 99 of the electronic component 48 to increase the available heat-conducting surface, which ribs protrude into the receiving space 36, and a Peltier element 102 is arranged as a heat-conducting body 96 between the electronic component 48 and the inner wall surface 90 of the outer wall 50 of the base body 34. Such a Peltier element 102 is an electrothermal converter that generates a temperature difference based on the Peltier effect when current flows through it. Accordingly, this Peltier element is connected to the power supply of the curbside charging device 18 or to the charging controller 72.A cold side 104 of the Peltier element 100, due to the current flow, rests against the heat-generating electronic component 48, while a warm side 106 rests against the inner wall surface 90 of the outer wall 50. Accordingly, the electronic component 48 can be actively cooled depending on the current flow, and the heat generated on the other side can be dissipated to the ground 92. With such a Peltier element 102, it would also be possible to preheat the electronic components 48 by voltage reversal, for example, at very low outside temperatures in winter.

[0055] In the alternative embodiment according to Figure 6, the heat-generating electronic component 48 is located inside the receiving space 34. A heat pipe 108 extends on the one hand from the heat-generating electronic component 48 to the wall 88 delimiting the electronics box 46 and on the other hand further through the wall 88 to the inner wall surface 90 and through the outer wall 50 of the base body 34 into the ground 92 and serves as a heat conducting body 96. The temperature gradients that occur between the ground 92 at the first end of the heat pipe 108 and the heat-generating electronic component 48 at the other end of the heat pipe 108 create an energy flow through the liquid in the heat pipe 108, whereby the heat is dissipated outwards into the ground 92.

[0056] In a further alternative embodiment according to Figure 7, the electronic component is connected to the wall 88 of the electronics box 46 with the interposition of a thermally conductive paste 98 serving as the first thermally conductive body 96, while a Peltier element 102 serving as an additional thermally conductive body 110 is arranged between the wall 88 and the inner wall surface 90 or the outer wall 50 of the base body 34, the cold side 104 of which lies against the wall 88 when energized and the warm side 106 of which lies against the inner wall surface 90 of the outer wall 50, so that here too a thermally conductive connection for dissipating the heat via the thermally conductive paste 98 to the wall 88 of the electronics box 46 takes place and heat is extracted from this by the Peltier element 102 in the direction of the outer wall 50.All of these possible designs achieve improved heat flow from the electronic components toward the ground, which leads to a longer service life for the electronic components and opens up the possibility of accelerating the charging process, since reducing the energy flow to the vehicle to prevent thermal overload in the charging device during the charging process needs to be carried out much less frequently. It should be clear that the electronics can be adapted to the respective conditions, in particular to the legal requirements of the countries, and any number of electronic components can be thermally coupled to the outer wall in any desired manner according to the invention. In addition to the described designs, any combination of these is of course also possible.

Claims

PATENT CLAIMS Curbstone, paving stone or curbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) with a base body (34) which has a receiving space (36) in the interior, which is closed by means of a protective cover (38), an interface unit (24), a power supply cable (22) which projects into the receiving space (36) in the base body (34), and heat-generating electronic components (48) which are arranged in the receiving space (36) of the base body (34) and via which the interface unit (24) is connected to the power supply cable (22), characterized in that at least one of the heat-generating electronic components (48) lies in a heat-conducting manner either directly against an inner wall surface (90) of an outer wall (50) of the base body (34) or one or more heat-conducting bodies (96,110) extend at least from the heat-generating electronic component (48) to the inner wall surface (90) of the outer wall (50) of the base body (34), wherein an outer wall surface (94) of the outer wall (50) facing away from the inner wall surface (90) bears against the surrounding soil (92) or foundation. Curbstone, paving stone, or curbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 1, characterized in that, all heat-generating electronic components (48) either lie in a heat-conducting manner directly against the inner wall surface (90) of the outer wall (50) of the base body (34) or the one or more heat-conducting bodies (96, 110) extend at least from the heat-generating electronic components (48) to the inner wall surface (90) of the outer wall (50) of the base body (34), wherein outer wall surfaces (94) of the outer walls (50) facing away from the inner wall surfaces (90) lie against the surrounding soil (92).Curbstone, paving stone, or curbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to claim 1 or 2, characterized in that the at least one heat-generating electronic component (48) is arranged in an electronics box (46) and, in a heat-conducting manner, either directly abuts a wall (86, 88) delimiting the electronics box (46), or the heat-conducting body (96) extends at least from the heat-generating electronic component (48) to the wall (86, 88) delimiting the electronics box (46), which wall either directly abuts an inner wall surface (90) of an outer wall (50) of the base body (34), or the heat-conducting body (96) or an additional heat-conducting body (110) extends at least from the wall (86, 88) delimiting the electronics box (46) to the inner wall surface (90) of the outer wall (50) of the base body (34).Curbstone, paving stone or curbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 1 to 3, characterized in that. The heat-generating electronic component (48) is attached to the wall (86, 88) delimiting the electronics box (46) or the outer wall (50) of the base body (34) and lies flat against it. Curb, paving stone, or curb charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 1 to 3, characterized in that a thermally conductive paste or a thermally conductive pad (98) is arranged as a thermally conductive body (96, 110) between the heat-generating electronic component (48) and the wall (86, 88) delimiting the electronics box (46) or the outer wall (50) of the base body (34).Curbstone, paving stone 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 3, characterized in that a flexible or rigid body is arranged as a heat-conducting body (96, 110) between the heat-generating electronic component (48) and the wall (86, 88) delimiting the electronics box (46) or the outer wall (50) of the base body (34). whose thermal conductivity is greater than 12 Curbstone, paving stone or curbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 1 to 3, characterized in that a Peltier element (102) is arranged as a heat conducting body (96, 110) between the heat-generating electronic component (48) and the wall (86, 88) delimiting the electronics box (46) or the outer wall (50) of the base body (34), thecold side (104) rests on the heat-generating electronic component (48) and its warm side (106) rests on the wall (86, 88) delimiting the electronics box (46) or the outer wall (50) of the base body (34). Curbstone, paving stone 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 3, characterized in that at least one heat pipe (108) is arranged as a heat conducting body (96, 110) between the heat-generating electronic component (48) and the wall (86, 88) delimiting the electronics box (46) or the outer wall (50) of the base body (34), which heat pipe extends from the heat-generating electronic component (48) to the wall (86, 88) delimiting the electronics box (46) and / or to the outer wall (50) of the base body (34).Curbstone, paving stone, or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 3 to 8, characterized in that the wall (86, 88) delimiting the electronics box (46) bears directly against the outer wall (50) of the base body (34). Curbstone, paving stone, or kerbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 3 to 8, characterized in that a thermally conductive paste, a thermally conductive pad (98), a graphite foil, or a spring plate extends as a thermally conductive body (94, 110) between the wall (86, 88) delimiting the electronics box (46) and the outer wall (50) of the base body (34). Curbstone, paving stone or curbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of the preceding claims 3 to 8, characterized in that a Peltier element (102) is arranged as a heat conducting body (94, 110) between the electronics box (46) and the outer wall (50) of the base body (34), the cold side (104) of which lies against the electronics box (46) and the warm side (106) of which lies against the outer wall (50) of the base body (34).Curbstone, paving stone or kerbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 3 to 8, characterized in that ribs (100) pointing towards the outer wall (50) are formed as heat-conducting bodies (94, 110) on the wall (86, 88) delimiting the electronics box (46), the ends of which ribs rest against the outer wall (50), or a metal foam is arranged between the wall (86, 88) delimiting the electronics box (46) and the outer wall (50) of the base body (34). Curbstone, paving stone or curbstone charging device (18) for charging an energy storage device (30) of an electrically driven vehicle (32) according to one of claims 3 to 8, characterized in that at least one heat pipe (108) extends as a heat conducting body (94, 110) from the wall (86, 88) delimiting the electronics box (46) through the outer wall (50) of the base body (34) into the ground (92). Curbstone, paving stone or curbstone 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 ribs (100) or a metal foam are formed on a housing (99) of the heat-generating electronic component (48). Curbstone, paving stone or curbstone charging device (18) for charging an energy storage device (30) of an electrically powered vehicle (32) according to one of claims 3 to 14, characterized in that the electronics box (46) is made of a material whose Thermal conductivity greater than 12 and serves as a heat conducting body (94).

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