Stationary inductive charging device and inductive vehicle charging system with stationary inductive charging device

Abstract

The present invention relates to a stationary inductive charging device (4) for an inductive vehicle charging system (2), comprising a housing (5) having a bottom plate (6) and a cover (7) disposed on the bottom plate (16), the bottom plate (6) having a flange (8) protruding beyond the cover (7). The inductive charging device 4 further comprises an inductive charging device 9 arranged in the interior 10 of the housing 5, defined by the bottom plate 6 and the cover 7, in thermal contact with the bottom plate 6 and configured to electromagnetically cooperate with an inductive charging device 11 assigned to the battery-electric vehicle 1, so that electrical energy can be inductively transferred from the stationary inductive charging device 4 to the battery-electric vehicle 1 and vice versa, and a cooling device 13 in thermal contact with the collar 8 and configured to conduct thermal energy from the bottom plate 6 to the surrounding air 47 by convection. The present invention particularly relates to an inductive vehicle charging system 2 including such a stationary inductive charging device 4.

Description

[Technical Field]

[0001] The invention relates to a stationary inductive charging device according to the subject matter of claim 1. The invention particularly relates to an inductive vehicle charging system comprising such a stationary inductive charging device.

[0002] An inductive vehicle charging system for charging battery-electric vehicles includes a stationary inductive charging device that can be placed on a foundation, such as the floor of a garage or parking lot, and is actually also called a GA (ground assembly). The inductive vehicle charging system is configured to electromagnetically cooperate with an inductive charging device, called a VA (vehicle assembly), assigned to the battery-electric vehicle, so that electrical energy can be transferred from the vehicle charging system to the battery-electric vehicle and vice versa. During operation, the stationary inductive charging device generates heat losses that can cause the stationary inductive charging device to overheat, especially at high ambient temperatures.

[0003] It is therefore an object of the present invention to provide an improved embodiment or at least one alternative embodiment of a stationary inductive charging device and / or an improved inductive vehicle charging system for charging battery-powered vehicles with electrical energy.

[0004] According to the invention, this problem is solved in particular by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims and the description.

[0005] The basic idea of ​​the present invention is to increase the cooling power, as dissipable heat per unit time, that can be obtained in an inductive charging device on the stationary side of an inductive vehicle charging system by means of a cooling device that is arranged in the stationary inductive charging device and is designed for dissipating heat by convection.

[0006] Therefore, a stationary inductive charging device that can be permanently placed on a base for an inductive vehicle charging system that is configured to charge battery-electric vehicles with electrical energy is provided, the stationary inductive charging device comprising at least: a housing having a bottom plate and a cover arranged on the bottom plate, the bottom plate having a flange that protrudes beyond the cover and at least partially surrounds the cover; - an inductive charging device arranged in an interior chamber of the housing defined by the bottom plate and the cover and in thermal contact with the bottom plate, the inductive charging device being configured to electromagnetically cooperate with an inductive charging device assigned to a battery-electric vehicle, so that electrical energy can be transferred from the stationary inductive charging device to the battery-electric vehicle and vice versa; a cooling device configured to conduct heat from the bottom plate by convection into the ambient air surrounding the stationary inductive charging device, the cooling device being in thermal contact with the flange; A stationary inductive charging device is proposed, comprising:

[0007] During operation of the stationary inductive charging device, losses occur, particularly in inductive charging devices, in the form of heat. These losses are primarily introduced into the bottom plate and are then conducted away by convection to the ambient air, and by conduction to the base. This already allows for relatively effective temperature control of the stationary inductive charging device. However, the heat that can be dissipated per unit of time, i.e., the cooling power, is directly proportional to the temperature difference between the bottom plate and the ambient air, and between the bottom plate and the base. Therefore, as the ambient temperature increases and, therefore, the temperature difference between the bottom plate and the ambient air and the base decreases, the heat that can be dissipated per unit of time decreases continuously. This can lead to overheating of the stationary inductive charging device, especially at high ambient temperatures, which can result in damage to the stationary inductive charging device. To avoid this, currently, a preset transmission power is called from the stationary inductive charging device, and the transmission power of the stationary inductive charging device is reduced when a certain ambient temperature is reached or exceeded. This reduces heat loss in the stationary inductive charging device, thereby preventing overheating for a given amount of heat that can be delivered per unit of time. However, the reduced transmission power may also result in less electrical energy being transferred from the stationary inductive charging device to the battery-electric vehicle, i.e., the vehicle-side inductive charging device, which significantly increases the charging time required to charge the battery of the battery-electric vehicle, thereby reducing customer comfort during charging of the battery-electric vehicle due to the resulting longer waiting times. Since this drawback is undesirable, the present invention proposes to increase the amount of heat that can be delivered per unit of time by supplementing the stationary inductive charging device with a cooling device that is designed to deliver heat from the bottom plate to the surrounding air by convection and is in thermal contact with, and particularly arranged in contact with, the flange of the bottom plate. This ensures sufficient temperature regulation of the stationary inductive charging device even at relatively high ambient temperatures.This has the advantage that operation of the stationary inductive charging device can be realized even at relatively high ambient temperatures without a reduction in the transmitted power.

[0008] In this case, it is preferable that the cooling device is located outside the housing, i.e., not in the interior of the housing, and is assigned to the flange so that it is in thermal contact with the ambient air. The cooling device may be, for example, in contact with the flange, i.e., directly supported thereon, or arranged via a heat-conducting means, such as a heat-conducting paste or the like. Optionally, the bottom plate can be realized as a cooling plate through which a fluid flows, thereby allowing the heat generated in the inductive charging device to be better guided through the bottom plate to the flange. Furthermore, it is preferable that the inductive charging device includes an energy coil for providing an electromagnetic field and / or power electronics. Alternatively, the power electronics may be housed in a separate, base-mountable device configured with respect to the stationary inductive charging device of the inductive vehicle charging system.

[0009] Preferably, the cooling device may be specified to be made of an electrically conductive material. The electrically conductive material may be, for example, a metallic material, in particular aluminum. The cooling device is preferably made entirely or at least partially of this material. A suitable cooling device can be manufactured relatively inexpensively and is particularly suitable for dissipating heat by convection. Furthermore, a suitable cooling device can specifically influence the electromagnetic field provided for transferring energy from the energy coil of the inductive charging device. For example, such a cooling device can guide or shield the electromagnetic field. Furthermore, a suitable cooling device can influence, in particular guide or shield, the electromagnetic field of a remote positioning device of a stationary inductive charging device, which assists or enables the approach of a battery-electric vehicle to a target charging location in an inductive vehicle charging system, and the electromagnetic field of a biological detection device of the stationary inductive charging device, which is configured to detect a biological organism in the vicinity of the stationary inductive charging device, for example, between the stationary inductive charging device and the vehicle inductive charging device.

[0010] More preferably, the cooling device may be specified to have a rectangular, L-shaped, rectangular-annular or square-annular profile in a line of sight directed perpendicular to the bottom plate.

[0011] It may be specified that the cooling device is preferably formed by cooling fins. The cooling fins are preferably formed separately and arranged parallel to one another and / or at equal intervals from one another in thermal contact with the flange, in contact with the flange, or via a heat-conducting means, such as a heat-conducting paste or the like. Corresponding cooling fins can be distributed over the flange and connected to it relatively easily. For example, the cooling fins can be integrally formed with the flange by being welded or soldered to the flange or molded together with the bottom plate. Furthermore, it may be preferable for the cooling fins to each extend perpendicular to the flange. This results in a preferred embodiment of the cooling device, particularly in terms of the relatively inexpensive production of the cooling device and the high heat that can be dissipated by convection.

[0012] More preferably, the cooling device is formed by at least one fin block, which may have a plate-like back wall and cooling fins arranged on a large area of ​​the back wall. The at least one fin block is preferably a monolithic member, and the cooling fins of the fin block are preferably arranged integrally on the large area of ​​the back wall, parallel to each other and evenly spaced from each other. The at least one fin block, i.e., the back wall and / or the cooling fins, are arranged in thermal contact with the flange, in contact with the flange, or via a heat-conducting means, such as a heat-conducting paste or the like. In particular, the at least one fin block may be integrally formed with the flange, for example, by being welded or brazed to the flange or molded together with the bottom plate. Furthermore, the at least one fin block may be arranged on the flange so that the large area of ​​the back wall of the at least one fin block with the cooling fins is located on the opposite side of the housing from the stationary inductive charging device. Furthermore, it may be advantageous if the cooling fins extend perpendicularly to a large area of ​​the rear wall of each of the at least one fin block, which results in a further advantageous embodiment of the cooling device, in particular in terms of the relatively inexpensive manufacture of the cooling device and the good dissipation of heat power.

[0013] Preferably, the back wall has the following features: - the back wall is formed by a flat, in particular rectangular plate without a cavity, - the back wall is bent at least once at a predetermined angle, in particular at a right angle, the rear wall is made of an electrically conductive material, in particular an aluminum material, and is configured, in relation to an inductive charging device, so as to influence the electromagnetic field provided by the energy coil of the inductive charging device, in particular to shield and / or guide the electromagnetic field; the rear wall is made of a conductive material, in particular an aluminum material, and is configured to influence the electromagnetic field provided by the biological detection device, in particular to shield and / or guide the electromagnetic field, with respect to a biological detection device arranged in the housing and configured to detect a biological organism in the vicinity of the stationary inductive charging device, in particular to detect a biological organism in the vicinity of the stationary inductive charging device; the rear wall is made of an electrically conductive material, in particular an aluminum material, and is configured to influence an electromagnetic field provided by a remote positioning device arranged in the housing and configured to move a battery-electric vehicle of the stationary inductive charging device closer to a target charging location, in particular to shield and / or guide the electromagnetic field, - The back wall is made of aluminum material It may be specified that the material has at least one of the following characteristics.

[0014] More preferably, the cooling fins have the following characteristics: - the cooling fins are tapered from the point of connection of the cooling fin with the flange or the back wall of at least one fin block to the free end of the fin opposite this connection, in particular converging in the form of a wedge, trapezoid or isosceles triangle; - the cooling fins converge from the point of attachment of the cooling fin to the collar or the back wall of at least one fin block to a sharp corner or an obtuse or sharp edge towards the free end of the fin opposite this attachment point; - the cooling fins are formed by rectangular, trapezoidal or triangular bases, the cooling fins are made of an electrically conductive material, in particular an aluminum material, and in relation to the inductive charging device, the cooling fins are configured to influence the electromagnetic field provided by the energy coil of the inductive charging device, in particular to shield and / or guide the electromagnetic field; the cooling fins are made of an electrically conductive material, in particular an aluminum material, and are configured for a biological detection device of the stationary inductive charging device arranged in the housing and configured to detect a biological organism in the vicinity of the stationary inductive charging device, for example between the stationary inductive charging device and the vehicle inductive charging device, such that the cooling fins influence the electromagnetic field provided by the biological detection device, in particular to shield and / or guide the electromagnetic field; the cooling fins are made of an electrically conductive material, in particular an aluminum material, and are configured to influence an electromagnetic field provided by a remote positioning device of a stationary inductive charging device arranged in the housing and configured to move a battery-electric vehicle closer to a target charging location, in particular to shield and / or guide the electromagnetic field, - The cooling fins are made of aluminum material It may be specified that the material has at least one of the following characteristics.

[0015] The cooling fins may be configured so that the cooling fins, together with the stationary inductive charging device housing, meet the IP69 protection class, which specifies standards for environmental protection against contamination and moisture. The cooling fins may also have a sloped outflow surface on the side opposite the foundation, which allows water to flow out rather than pooling on the foundation.

[0016] Preferably, the bottom plate has a bottom surface on the side facing the cover, which may be divided into a mounting surface configured to mount an inductive charging device and an edge surface surrounding the mounting surface and assigned to the flange. The inductive charging device and the cover are arranged on the mounting surface, and the cover completely covers the mounting surface and the inductive charging device. The cooling device is arranged on the edge surface of the flange, in particular outside the interior chamber and in contact with the ambient air. In order to enable the cooling device to efficiently dissipate heat by convection, it may further be specified that the cooling device arranged on the edge surface extends at least partially or completely around the housing. For example, the cooling device may completely or substantially completely surround the housing.

[0017] More preferably, the bottom plate has a rectangular parallelepiped shape, the bottom surface being quadrangular, in particular square or rectangular, and the edge surfaces each have a surface segment extending over the edge of the bottom surface. The first surface segment, located in the area of ​​the cable feed-through of the stationary inductive charging device, faces the third surface segment, and the second surface segment faces the fourth surface segment. Preferably, the cooling devices are located only on the first, second, and fourth surface segments, or on the first, second, third, and fourth surface segments. The first variant, in which the cooling devices are located on the first, second, and fourth surface segments, is particularly suitable for a stationary inductive charging device located in the area of ​​the front axle of a battery-powered vehicle during operation of the inductive vehicle charging system, i.e., during charging operations. If the stationary inductive charging device is located in the area under the rear axle of the battery-powered vehicle during operation of the inductive vehicle charging system, i.e., during charging operations, it may be advantageous to arrange the cooling devices on the first, second, third, and fourth surface segments, i.e., so that the cooling devices completely surround the housing. In particular, to improve the manufacturability of the stationary inductive charging device, it may be specified that the corner areas of the edge side are not provided with cooling devices.

[0018] Preferably, the bottom plate has a bottom surface on the side facing the cover, the bottom surface being divided into a mounting surface configured to mount the inductive charging device and an edge surface surrounding the mounting surface and assigned to the collar. Furthermore, the inductive charging device and the cover are arranged on the mounting surface, and the cover covers the mounting surface and the inductive charging device. Furthermore, it is specified that the cooling device is arranged on the edge surface of the collar, the bottom surface, in particular the mounting surface or the edge surface of the bottom, defines a reference plane, and the inductive charging device has an energy coil and an assembly assigned to the energy coil, the assembly consisting of a magnetic field conductor, preferably made of ferrite, for guiding the electromagnetic field provided by the energy coil, the magnetic field conductor forming a plane, hereinafter referred to as the magnetic field conductor level, arranged at a distance from and substantially parallel to the reference plane. Furthermore, the cover has an upper edge or upper surface on the side opposite the bottom surface of the cover, which forms a plane arranged substantially parallel to and spaced apart from a reference plane, hereinafter referred to as the cover level, and the cooling device, particularly the back wall and / or cooling fins of the cooling device, has a maximum height in a height direction extending perpendicular to the reference plane, the maximum height of the cooling device being smaller than the linear distance between the reference plane and the cover level and / or the linear distance between the reference plane and the magnetic field conductor level. For magnetic field conductors arranged in a three-dimensional structure, the magnetic field conductor level is preferably defined by a height extending perpendicular to the reference plane, which is obtained by the arithmetic mean of the individual distances between the magnetic field conductor and the reference plane in the height direction. This optimally adapts the cooling device to an inductive charging device, particularly preventing losses, such as eddy current losses. This, in particular, allows for relatively small variations in the electromagnetic field.

[0019] According to another basic idea of ​​the present invention, an inductive vehicle charging system is provided which is configured to charge a battery-powered vehicle with electrical energy and which comprises a stationary inductive charging device which can be permanently positioned on a base as described above.

[0020] In summary, it can be seen that the present invention relates to a stationary inductive charging device, preferably for an inductive vehicle charging system, comprising a housing having a bottom plate and a cover arranged on the bottom plate, the bottom plate having a flange protruding beyond the cover. The stationary inductive charging device further comprises an inductive charging device arranged in an interior chamber of the housing defined by the bottom plate and the cover, in thermal contact with the bottom plate, and configured to electromagnetically cooperate with an inductive charging device assigned to a battery-electric vehicle, whereby electrical energy can be transferred from the stationary inductive charging device to the battery-electric vehicle and vice versa; and a cooling device in thermal contact with the flange and configured to conduct thermal energy of the bottom plate by convection into the air surrounding the stationary inductive charging device. The present invention also particularly relates to an inductive vehicle charging system comprising such a stationary inductive charging device.

[0021] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the corresponding description of the drawings based on the drawings.

[0022] Naturally, the features mentioned above and those further described below can be used not only in the combinations described respectively, but also in other combinations or alone, without departing from the scope of the invention.

[0023] Preferred embodiments of the present invention are illustrated in the drawings and explained in detail in the following description, wherein like reference numerals refer to identical or similar or functionally identical components. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a side view of a first embodiment of a stationary inductive charging device for an inductive vehicle charging system configured to charge battery-electric vehicles with electrical energy, with the stationary inductive charging device positioned on a foundation cut away for easier understanding of the illustration. [Figure 2] FIG. 10 is a plan view showing another embodiment of the stationary inductive charging device. [Figure 3] FIG. 10 is a plan view showing another embodiment of the stationary inductive charging device. [Figure 4] FIG. 10 is a plan view showing another embodiment of the stationary inductive charging device. [Figure 5] FIG. 10 is a plan view showing another embodiment of the stationary inductive charging device. [Figure 6] FIG. 1 is a perspective view showing a preferred embodiment of a cooling device. [Figure 7] FIG. 1 is a perspective view showing a preferred embodiment of a cooling device. [Figure 8] FIG. 10 is a side view showing another embodiment of a stationary inductive charging device. [Figure 9] FIG. 10 is a plan view showing another embodiment of the stationary inductive charging device.

[0025] 1-9 show a preferred embodiment of a stationary inductive charging device, generally designated 4, for an inductive vehicle charging system 2 configured to charge the battery of a battery-electric motor vehicle 1 with electrical energy. The stationary inductive charging device 4 is permanently positioned, for example, on a flat base 3, such as the floor of a garage or parking lot, and has a central housing 5 with a flat bottom plate 6 and a dome-shaped cover 7 centrally disposed on the bottom plate 6. The bottom plate 6 and the cover 7 thereby define an interior chamber 10 of the housing 5, in which the various components of the stationary inductive charging device 4 are arranged for protection from environmental influences. The bottom plate 6 has or forms a flange 8, which in this embodiment protrudes horizontally beyond the cover 7 and extends at least partially around the cover 7 in a ribbed manner. The stationary inductive charging device 4 further comprises an inductive charging device 9, which is arranged in the interior 10 of the housing 5 and is arranged next to the bottom plate 6 such that the inductive charging device 9 is in at least thermal contact with, i.e., thermally connected to, the bottom plate 6. For example, the inductive charging device 9 is supported against the bottom plate 6. Furthermore, the inductive charging device 9 is configured to electromagnetically cooperate with an inductive charging device 11 assigned to the battery-electric vehicle 1, so that electrical energy can be transferred from the stationary inductive charging device 4 to the battery-electric vehicle 1 and vice versa during operation of the inductive vehicle charging system 2. For example, it is specified that the bottom plate 6 has a flat bottom surface 29 on the side facing the cover 7, which is divided into a mounting surface 30 configured for mounting the inductive charging device 9, i.e., for forming at least thermal contact therewith, and an edge surface 31 surrounding the mounting surface 30 and assigned to the flange 8, facing away from the base 3. The inductive charging device 9 and the cover 7 are arranged on the mounting surface 30.

[0026] In particular, in the inductive charging device 9, losses in the form of heat occur during operation of the inductive vehicle charging system 2, which are introduced, in particular into the bottom plate 6, and are conducted from the bottom plate 6, in particular via the flange 8, by convection to the ambient air on the one hand, and by thermal conduction to the base 3 on the other hand, thereby achieving a relatively effective temperature regulation of the stationary inductive charging device 4. The proportion of the distributable heat power that can be distributable by convection is directly proportional to the temperature difference between the bottom plate 6 and the ambient air 47 on the one hand, and between the bottom plate 6 and the base 3 on the other hand. Therefore, as the ambient temperature increases and thus the temperature difference between the bottom plate 6 and the ambient air 47 and the base 3 decreases, the distributable heat power continuously decreases, which may lead to overheating of the stationary inductive charging device 4, especially at high ambient temperatures, and thus to damage to the stationary inductive charging device 4. To avoid this, currently, a preset transmission power is called up from the stationary inductive charging device 4 at the user's side, and the transmission power of the inductive charging device 9 is throttled down when a certain ambient temperature is reached or exceeded. This reduces the heat loss generated in the stationary inductive charging device 4, thereby preventing overheating of the stationary inductive charging device 4 with the provided dissipable heat power. However, the throttled transmission power may also result in less electrical energy being transferred from the stationary inductive charging device 4 to the battery of the battery-electric vehicle 1, i.e., to the vehicle-side inductive charging device 11. This, in particular, increases the charging time required to charge the battery-electric vehicle 1, resulting in longer waiting times and thus reduced customer comfort when charging the battery-electric vehicle 1.

[0027] In order to overcome these drawbacks, the stationary inductive charging device 4 is configured with a cooling device 13 made of a conductive material, in particular an aluminum material, and this cooling device 13 is configured to conduct heat from the bottom plate 6 and / or the collar portion 8 to the surrounding air 47 by convection, and is specified to be in at least thermal contact with the collar portion 8, i.e., thermally connected.

[0028] According to the embodiment shown in FIG. 1 , the cooling device 13 is supported in contact with the edge surface 31 of the flange 8 facing away from the base 3 and in contact with the ambient air 47 outside the interior chamber 10. As a result, during operation of the inductive vehicle charging system 2, a thermal path 49, as shown in FIGS. 8 and 9 , is generated, along which a heat flow based on the thermal power flows. This thermal path 49 runs from the inductive charging device 9, considered a heat source in the illustrated embodiment, through the bottom plate 6 to the flange 8 of the bottom plate 6 and from there to the cooling device 13. The cooling device 13 can then release heat by convection into the ambient air 47, thereby increasing the heat that can be released per unit time and thus achieving improved temperature regulation of the stationary inductive charging device 4. This allows the inductive vehicle charging system 2 to operate at higher ambient temperatures without reducing the transmission power, ultimately increasing customer comfort.

[0029] 1 , the inductive charging device 9 of the stationary inductive charging device 4 has, for example, a flat energy coil 21 that provides an electromagnetic field for electromagnetic cooperation with the inductive charging device 11 assigned to the battery-electric vehicle 1. The energy coil 21 is assigned to an assembly 38 of a separate magnetic field conductor 39, preferably made of ferrite, that guides the magnetic field of the energy coil 21. The stationary inductive charging device 4 further comprises a living organism detection device 23 that is configured to detect a living organism in the vicinity of the stationary inductive charging device 4, for example, between the stationary inductive charging device 4 and the vehicle inductive charging device 11, and a remote positioning device 25 that is configured to move the battery-electric vehicle 1 toward a target charging position at the stationary inductive charging device 4. Additionally, the inductive vehicle charging system 2 may include power electronics, not shown in FIG. 1 , housed within the inductive charging device 9 or in a device separate from the stationary inductive charging device 4 of the inductive vehicle charging system 2.

[0030] As can be seen in FIGS. 2 to 5, the bottom plate 6 is, for example, cuboid-shaped, and the bottom surface 29 is rectangular. In this case, the edge strip surface 31 has associated surface segments 32, 33, 34, and 35, each extending completely over the edge 36 of the bottom surface 29. The first surface segment 32, located in the area of ​​the cable feed-through 48 of the stationary inductive charging device 4, faces the third surface segment 34. The second surface segment 33 faces the fourth surface segment 35. In this example, the first surface segment 32 is parallel to the third surface segment 34. The second surface segment 33 is parallel to the fourth surface segment 35. The first and third surface segments 32 and 34 are perpendicular to the second and fourth surface segments 33 and 35, respectively. The surface segments 32, 33, 34, and 35 thereby define a frame that, in this example, surrounds the mounting surface 29. In the embodiment shown in FIG. 2, it is specified that the cooling device 13 is arranged on all four surface segments 32, 33, 34, and 35. The cooling device 13 thus completely surrounds the housing 5 and the inductive charging device 9 in a frame-like manner. In the direction of view 14, which is perpendicular to the bottom plate 6, the cooling device 13 therefore has an approximately square-ring-shaped contour 15, with the first surface segment 32 excluding the area for the cable guide 47. This allows for particularly good convective cooling. In the embodiment shown in FIG. 3, it is specified that the cooling device 13 is arranged only on the first surface segment 32, the second surface segment 33, and the fourth surface segment 35. As a result, the cooling device 13 has an approximately U-shaped contour 15 in the viewing direction 14 perpendicular to the bottom plate 6, in which the area for the cable feed-through 47 is excluded in the first surface segment 32. The embodiment shown in Figure 4 corresponds to the embodiment shown in Figure 2, except that the cooling device 13 is not provided in the corner area surface 50 of the edge strip surface 31 in order to improve the manufacturability of the stationary inductive charging device 4.The embodiment shown in FIG. 5 corresponds to the embodiment shown in FIG. 3 , except that the cooling devices 13 are not provided on the corner area surfaces 50 of the edge strip surface 31, also to improve the manufacturability of the stationary inductive charging device 4. The embodiment shown in FIGS. 3 and 5, in which the cooling devices 13 are arranged on the first surface segment 32, the second surface segment 33, and the fourth surface segment 35, is particularly suitable for cases in which the stationary inductive charging device 4 is arranged in the area of ​​the front axle of the battery-electric vehicle 1 during operation of the inductive vehicle charging system 2. If the stationary inductive charging device 4 is arranged in the area below the rear axle of the battery-electric vehicle 1 during operation of the inductive vehicle charging system 2, it may be advantageous to arrange the cooling devices 13 on the first surface segment 32, the second surface segment 33, the third surface segment 34, and the fourth surface segment 35, as in the embodiment shown in FIGS. 2 and 4 .

[0031] 6 to 9 show a preferred embodiment of the cooling device 13, and according to Fig. 8 and Fig. 9, the cooling device 13 is formed by separate cooling fins 16. The cooling fins 16 are arranged on the flange 8, for example, parallel to each other and at equal intervals, in thermal contact with the flange 8, on one edge surface 31 of the flange 8, and the cooling fins 16 extend perpendicular to the flange 8. The cooling fins 16 are formed, for example, integrally with the flange 8.

[0032] 6 and 7, the cooling device 13 is formed by at least one fin block 17, which has a plate-like back wall 18 and cooling fins 16 arranged on a large-area portion 19 of the back wall 18. The at least one fin block 17 is, for example, a monolithic component, and the cooling fins 16 of the fin block 17 are arranged integrally on the large-area portion 19 of the back wall 18, preferably parallel to one another and evenly spaced from one another. The at least one fin block 17, i.e., the back wall 18 and the cooling fins 16 of the fin block 17, are arranged on the flange 8 at one edge 31 of the flange 8 in thermal contact with the flange 8, with the back wall 18 facing towards the housing 5 and the cooling fins 16 facing away from the housing 5. The back wall 18 may further be formed by a flat, in particular cavity-free, rectangular plate 20. Furthermore, the back wall 18 may be bent at least once at an angle, in particular at a right angle. Furthermore, the back wall 18 may be made of an electrically conductive material, in particular an aluminum material, and in relation to the inductive charging device 9, the back wall 18 may be configured to influence the electromagnetic field provided by the energy coil 21 and / or the electromagnetic field provided by the biological detection device 23 and / or the electromagnetic field provided by the remote positioning device 25, in particular to shield and / or guide the electromagnetic fields.

[0033] The cooling fins 16 described above, such as the embodiments shown in Figures 6 to 9, have in common that they taper from the point of connection of the cooling fin 16 with the flange 8 or the back wall 18 to the free fin end 27 opposite this connection, in particular that they converge in the form of a wedge, a trapezoid or an isosceles triangle. Furthermore, these cooling fins 16 are distinguished, for example, by the fact that they converge from the point of connection with the flange 8 or the back wall 18 to the free fin end 27 opposite this connection to a sharp corner or to an obtuse, pointed or oblique edge 28 relative to the bottom plate 6. Furthermore, the cooling fins 16 may be formed by a rectangular, trapezoidal or triangular base. Furthermore, the cooling fins 16 may be formed from a conductive material, in particular an aluminum material, and in relation to the inductive charging device 9, the cooling fins 16 may be configured to influence the magnetic field provided by the energy coil 21 and / or the electromagnetic field provided by the biological detection device 23 and / or the electromagnetic field provided by the remote positioning device 25, in particular to shield and / or guide the electromagnetic field.

[0034] In order to optimally match the cooling device 13 with the inductive charging device 9, the biological detection device 23 and the remote positioning device 25, it may be specified, for example, that the bottom surface 29, in particular the mounting surface 30 or edge surface 31 of the bottom surface 29, defines a reference plane 37, the magnetic field conductor 39 of the assembly 38 defines a second plane called the magnetic field conductor level 40 and arranged parallel to and spaced apart from the reference plane 37, and the cover 7 defines a third plane called the magnetic field conductor level 40 and arranged parallel to and spaced apart from the reference plane 37, and this third plane is formed or installed on the cover upper edge or cover upper surface 41 of the cover 7 opposite the bottom surface 29 and is called the cover level 42. According to at least FIG. 1, the cooling device 13, in particular the aforementioned back wall 18 and / or the aforementioned cooling fins 16, has a maximum height 44 in a height direction 43 extending perpendicular to the reference plane 37, which is specified to be 1) smaller than the linear distance 45 between the reference plane 37 and the cover level 42, and 2) smaller than the linear distance 46 between the reference plane 37 and the magnetic field conductor level 40.

Claims

1. A stationary inductive charging device (4) that can be permanently placed on a base (3) for an inductive vehicle charging system (2) configured to charge the battery of a battery-powered vehicle (1) with electrical energy, the stationary inductive charging device (4) comprising at least a housing (5) having a bottom plate (6) and a cover (7) arranged on the bottom plate (16), the bottom plate (6) having or forming a flange (8) that protrudes beyond the cover (7) and at least partially surrounds the cover (7); an inductive charging device (9) arranged in an interior space (10) of the housing (5) defined by the bottom plate (6) and the cover (7) and in thermal contact with the bottom plate (6), and configured to electromagnetically cooperate with an inductive charging device (11) assigned to the battery-electric vehicle (1), so that electrical energy can be inductively transferred from the stationary inductive charging device (4) to the battery-electric vehicle (1) and vice versa; a cooling device (13) configured to conduct thermal energy of the bottom plate (6) to the surrounding air (47) by convection, the cooling device (13) being in thermal contact with the flange (8); A stationary inductive charging device (4) having:

2. 2. The stationary inductive charging device (4) according to claim 1, characterized in that the cooling device (13) is arranged in contact with the flange (8) or via a heat conductive means, such as a heat conductive paste or the like.

3. 3. The stationary inductive charging device (4) according to claim 1 or 2, characterized in that the cooling device (13) is made of an electrically conductive material.

4. 4. The stationary inductive charging device (4) according to claim 1, wherein the cooling device (13) has a rectangular, L-shaped, rectangular-annular or square-annular contour (15) in a line of sight (14) directed perpendicular to the bottom plate (6).

5. 5. The stationary inductive charging device (4) according to claim 1, wherein the cooling device (13) is formed by cooling fins (16).

6. 5. The stationary inductive charging device (4) according to claim 1, wherein the cooling device (13) is formed by at least one fin block (17), the fin block (17) having a plate-shaped back wall (18) and cooling fins (16) arranged on a large area (19) of the back wall (18).

7. The back wall (18) The back wall (18) is formed by a flat, in particular cavity-free, rectangular plate (20), The back wall (18) is bent at least once at an angle, in particular at a right angle. the rear wall (18) is made of an electrically conductive material, in particular an aluminum material, and is configured with respect to the inductive charging device (9) so as to influence the electromagnetic field provided by the energy coil (21) of the inductive charging device (9), in particular to shield and / or guide the electromagnetic field. The rear wall (18) is made of a conductive material, in particular an aluminum material, and is configured to influence an electromagnetic field provided by a biological detection device (23) arranged in the housing (5) and configured to detect a living organism of the stationary inductive charging device (4), in particular to shield and / or guide the electromagnetic field. The rear wall (18) is made of a conductive material, in particular an aluminum material, and is configured to influence, in particular to shield and / or guide, an electromagnetic field provided by a remote positioning device (25) arranged in the housing (5) and configured to move the battery-electric vehicle (1) closer to a predetermined target charging position of the stationary inductive charging device (4). The back wall (18) is made of aluminum material.

7. The stationary inductive charging device (4) according to claim 6, characterized in that it has at least one of the following features:

8. The cooling fins (16) are the cooling fins (16) are tapered from the point of attachment of the cooling fins (16) to the flange (8) or the back wall (18) to the free fin end (27) opposite the attachment point, in particular the cooling fins (16) converge in the shape of a wedge, a trapezoid or an isosceles triangle; The cooling fins (16) converge from the point of attachment of the cooling fins (16) to the collar (8) or the back wall (18) to a sharp corner or a blunt or sharp edge (28) towards the free fin end (27) opposite the attachment point. The cooling fins (16) are formed by rectangular, trapezoidal or triangular bases. the cooling fins (16) are made of an electrically conductive material, in particular an aluminum material, and are configured with respect to the inductive charging device (9) so as to shield and / or guide the electromagnetic field provided by the energy coil (21) of the inductive charging device (9). The cooling fins (16) are made of a conductive material, in particular an aluminum material, and are configured to influence an electromagnetic field provided by a biological detection device (23) arranged in the housing (5) and configured to detect a living organism of the stationary inductive charging device (4), in particular to shield and / or guide the electromagnetic field. the cooling fins (16) are made of an electrically conductive material, in particular an aluminum material, and are configured to influence an electromagnetic field provided by a remote positioning device (25) of the stationary inductive charging device (4) arranged in the housing (5) and configured to move the battery-electric vehicle (1) toward a target charging position, in particular to shield and / or guide the electromagnetic field. The cooling fins (16) are made of aluminum material.

8. The stationary inductive charging device (4) according to claim 5, characterized in that it has at least one of the following features:

9. The bottom plate (6) has a bottom surface (29) facing the cover (7), which is divided into a mounting surface (30) adapted to mount the inductive charging device (9) and a marginal surface (31) surrounding the mounting surface (30) and assigned to the flange (8); The inductive charging device (9) and the cover (7) are disposed on the mounting surface (30), and the cover (7) covers the mounting surface (30) and the inductive charging device (9); The cooling device (13) is disposed on one edge surface (31) of the flange portion (8).

9. A stationary inductive charging device (4) according to any one of claims 1 to 8.

10. the bottom plate (6) is of rectangular parallelepiped design and the bottom surface (29) is of quadrangular, in particular square or rectangular, design; The edge strip surface (31) has surface segments (32, 33, 34, 35) each extending over an edge (36) of the bottom surface (29); a first surface segment (32) arranged in the area of ​​a cable passage (47) of the stationary inductive charging device (4) faces a third surface segment (34); The second surface segment (33) faces the fourth surface segment (35); Said cooling device (13) comprises the following surface segments (32, 33, 34, 35): a first surface segment (32), a second surface segment (33) and a fourth surface segment (35); or a first surface segment (32), a second surface segment (33), a third surface segment (34) and a fourth surface segment (35); is located in 10. Stationary inductive charging device (4) according to claim 9, characterized in that

11. The bottom plate (6) has a bottom surface (29) facing the cover (7), which is divided into a mounting surface (30) adapted to mount the inductive charging device (9) and a marginal surface (31) surrounding the mounting surface (30) and assigned to the flange (8); The inductive charging device (9) and the cover (7) are disposed on the mounting surface (30), and the cover (7) covers the mounting surface (30) and the inductive charging device (9); The cooling device (13) is disposed on the edge strip surface (31) of the flange portion (8), The bottom surface (29), in particular the mounting surface (30) of the bottom surface (29) or the edge strip surface (31) defines a reference plane (37); The inductive charging device (9) comprises an energy coil (21) and an assembly (38) assigned to the energy coil, the assembly (38) consisting of magnetic field conductors (39) for guiding the electromagnetic field provided by the energy coil (21), the magnetic field conductors (39) forming a plane, hereinafter referred to as a magnetic field conductor level (40), arranged at a distance from and substantially parallel to the reference plane (37), the cover (7) has an upper cover edge or upper cover surface (41) on the side of the cover (7) opposite the bottom surface (29), the upper cover edge or upper cover surface (41) forming a plane, hereinafter referred to as a cover level (42), arranged at a distance from and substantially parallel to the reference plane (37); the cooling device (13), in particular the back wall (18) and / or the cooling fins (16) of the cooling device (13), has a maximum height (44) in a height direction (43) extending perpendicular to the reference plane (37), the maximum height (44) of the cooling device (13) is smaller than the linear distance (45) between the reference plane (37) and the cover level (42); The maximum height (44) of the cooling device (13) is less than the linear distance (46) between the reference plane (37) and the magnetic field conductor level (40).

11. A stationary inductive charging device (4) according to any one of claims 1 to 10.

12. 12. An inductive vehicle charging system (2) configured to charge a battery-powered vehicle (1) with electrical energy, comprising a stationary inductive charging device (4) that can be permanently positioned on a base (3) according to any one of claims 1 to 11.

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