Cooling device with two cooling plates for cooling an electronic component of a motor vehicle, electronic assembly and motor vehicle

Abstract

The invention relates to a cooling device (1) for cooling an electronic component (2) of a motor vehicle (3) with two cooling plates (4, 5), which comprises fewer components, less weight and less complexity. The cooling device (1) comprises a first cooling plate (4) with a first cooling channel (6) for a cooling fluid, as well as a second cooling plate (5) with a second cooling channel (7) for the cooling fluid, and a housing (8) for fastening a printed circuit board (25) carrying the electronic component (2), wherein the first cooling plate (4) and the second cooling plate (5) are fastened to the housing (8). The housing (8) forms a channel system (9) which fluidically connects the first cooling channel (6) and the second cooling channel (7) to one another. The invention further relates to an associated electronic assembly (27) and an associated motor vehicle (3).

Description

[0001] Cooling device with two cooling plates for cooling an electronic component of a motor vehicle, electronic assembly and motor vehicle

[0002] The present invention relates to a cooling device for cooling an electronic component of a motor vehicle, comprising a first cooling plate with a first cooling channel for a cooling fluid, a second cooling plate with a second cooling channel for the cooling fluid, and a housing for fastening a printed circuit board carrying the electronic component, wherein the first cooling plate and the second cooling plate are fastened to the housing. The invention further relates to an electronic assembly and an associated motor vehicle.

[0003] As the functionality and computing power of computing systems for vehicles increases, in particular electronic control units (ECUs), domain control units (DCUs) or zone control units (ZPUs), for example for driver assistance systems or other semi-automatic or fully automatic driving functions, the heat dissipation of electronic components increases. It is therefore known to use active cooling solutions by means of a cooling fluid for these electronic components. These active cooling solutions are usually accompanied by an increased installation space.

[0004] In order to further increase the cooling capacity of a cooling device, two cooling plates can be provided for a cooling device, for example, which carry cooling fluid inside them and can thus dissipate harmful waste heat from the electronic component. In the prior art, separate fluid manifolds are used to connect two cooling plates fluidically. However, the use of such a component disadvantageously increases the weight and the number of parts of the cooling device, so that in particular an assembly time for the cooling device and its complexity is increased.

[0005] One object of the present invention is to provide an improved concept for a cooling device with two cooling plates and for an associated electronic assembly, which has fewer components, less weight and less complexity.

[0006] The object is solved by the subject matters of the independent patent claims. Advantageous further embodiments of the invention are described by the dependent patent claims, the following description and the figures. One aspect of the invention relates to a cooling device for cooling an electronic component of a motor vehicle. In particular, the cooling device comprises a first cooling plate with a first cooling channel for a cooling fluid, and a second cooling plate with a second cooling channel for the cooling fluid. The cooling device further comprises a housing for fastening a printed circuit board carrying the electronic component. The housing forms a channel system which fluidically connects the first cooling channel and the second cooling channel.

[0007] Such a cooling device with two fluid-cooled cooling plates can advantageously reduce the number of components of the cooling device and the weight of the cooling device. In particular, their complexity can be reduced and their assembly time can also be reduced. In addition, the cooling device according to the invention comprises a smaller installation space than known solutions.

[0008] In particular, a separate fluid manifold for connecting the cooling channels of the two cooling plates can be dispensed with, so that at least one component and associated mounting parts can be saved. In particular, time can also be saved in order to mount a fluid manifold on the housing or on the cooling plates.

[0009] The electronic component to be cooled can be any electronic element that generates waste heat during operation, which must be actively dissipated by the cooling device so that the electronic component does not overheat and become damaged as a result. For example, the electronic element can be an ECU, DCU or ZPU, in particular a computer chip, a processor, an integrated circuit or a system-on-chip (SoC), which can be used in particular for control units of the motor vehicle.

[0010] The two cooling plates can, for example, be identical to each other in order to further reduce complexity. In particular, the respective cooling plate can form a respective cooling channel in its interior, within which the cooling fluid can flow and thereby absorb and dissipate waste heat. In particular, the cooling plates can have a plate-like design to ensure a high surface area for heat conduction.

[0011] The cooling plates can be metallic, for example made of aluminum, to ensure high thermal conductivity. Alternatively, the cooling plates can be made of plastic. In particular, the cooling plates may comprise fixing elements so that they can be fastened directly to the housing. For example, the cooling plates can be screwed to the housing, wherein alternative fastening options can be provided. The housing is preferably specially configured to support the printed circuit board and the cooling plates. In particular, the housing may comprise fixing elements to which the printed circuit board and the cooling plates can preferably be fastened directly.

[0012] The housing can be made of metal or plastic, for example. In particular, the housing may comprise further fixing elements, for example in order to be fastened directly to corresponding interfaces of the motor vehicle.

[0013] In particular, "fastening" can be understood to mean that the cooling plates are each mounted on the housing and supported by the housing, or that the printed circuit board can be mounted on the housing and supported by the housing.

[0014] In particular, the printed circuit board is not an element of the cooling device, but can merely be fastened to the housing. The housing can also comprise openings or interfaces so that the printed circuit board can, for example, be signally connected to an electronic interface of the vehicle.

[0015] The printed circuit board (PCB) can be designed to carry the electronic component. The printed circuit board is used in particular for mechanical fastening and electrical connection of the electronic component.

[0016] In particular, the printed circuit board can carry at least one electronic component, preferably several electronic components, which can generate waste heat during operation, which is to be dissipated by the cooling device.

[0017] The channel system is formed by the housing itself, i.e. not by a component separate to the housing. In particular, it is also not intended that the channel system be formed by separate hoses or lines within the housing, but only by the housing. In particular, the walls of the channel system can be formed by the housing itself.

[0018] In particular, a channel system can be understood as a system comprising at least one channel, preferably at least two channels, to fluidically connect the two cooling channels with each other. In particular, a fluidic connection can be understood to mean that the two cooling channels are connected to each other by the channel system in such a way that a common cooling fluid can flow in both cooling channels.

[0019] In particular, the cooling fluid can be a liquid, for example water or an aqueous cooling fluid, or a gas, for example air.

[0020] In at least one embodiment, it is provided that the housing forms an inlet for the cooling fluid and an outlet for the cooling fluid, wherein the inlet and the outlet are fluidically connected to the channel system. As a result, the cooling fluid, which is cooled in particular, can advantageously be introduced into the inlet of the housing, whereby the cooling fluid can be directed into the two cooling channels via the channel system of the housing. In addition, the heated cooling fluid in particular can advantageously be discharged from the outlet of the housing, whereby the cooling fluid can be directed out of the two cooling channels via the channel system of the housing.

[0021] The housing can therefore only provide a single inlet and a single outlet for the cooling fluid, instead of one inlet and outlet for each cooling channel. This can advantageously reduce the complexity of the cooling device. The inlet and the outlet can, for example, be fluidically connected to an interface of a cooling system of the motor vehicle, wherein the cooling system can comprise, for example, a heat exchanger for the cooling fluid, a fluid pump or a fluid compressor, a reservoir and / or an expansion tank for the cooling fluid, as well as an associated electronic control device.

[0022] In at least one embodiment, it is provided that the inlet and the outlet are formed on a common front side of the housing. As a result, the cooling device can be connected fluidically to complementary interfaces of a cooling system correspondingly easily, in particular by only a single docking process for the inlet and the outlet.

[0023] In at least one embodiment of a first alternative of the cooling device, it is provided that a first cooling channel inlet of the first cooling channel and a second cooling channel inlet of the second cooling channel are fluidically connected in parallel to the inlet of the housing via an inlet connection channel of the channel system. This allows the cooled cooling fluid to be advantageously distributed through the inlet, preferably evenly, to both cooling plates. In particular, an even distribution of the cooling capacity can thus be distributed to both cooling plates. In particular, the inlet connection channel can act as an inlet fluid distributor, by means of which the incoming cooled cooling fluid can be distributed to both cooling channels simultaneously. Here, "parallel" can be understood to mean that the inlet can be connected both directly to the first cooling channel inlet and directly to the second cooling channel inlet.

[0024] In particular, the inlet and the inlet connection channel can virtually form a T-piece or a Y- piece, within which the cooled cooling fluid can be divided between the two cooling channels.

[0025] In at least one embodiment of the first alternative, it is provided that a first cooling channel outlet of the first cooling channel and a second cooling channel outlet of the second cooling channel are fluidically connected in parallel to the outlet via an outlet connection channel of the channel system.

[0026] In particular, the outlet connection channel can act as an outlet fluid connector, by means of which the heated cooling fluid flowing out of the respective cooling channel outlets can be brought together and guided to the outlet at the same time. By "parallel" it can be understood here that the outlet can be connected both directly to the first cooling channel outlet and directly to the second cooling channel outlet.

[0027] In particular, the outlet and the outlet connection channel can form a kind of T-piece or Y- piece, within which the heated cooling fluid from the two cooling channels can be brought together.

[0028] In at least one embodiment of the first alternative, it is provided that the inlet connection channel is a first through-hole through the housing or the outlet connection channel is a separate, second through-hole through the housing. This makes it particularly easy to provide the inlet connection channel or the outlet connection channel in the housing.

[0029] A through-hole is a hole that passes completely through a component, in particular through the housing. In particular, the through-hole may have been drilled into a main body of the housing using a drill. This advantageously requires little effort and is also less complex.

[0030] In particular, the respective through-hole runs through a top side and bottom side of the housing, which can be adjacent to the front side of the housing. The inlet and outlet of the housing can be fluidically connected to the through-hole, particularly within the housing. For example, the inlet and outlet can each comprise a blind bore that opens into the through-hole. In particular, the blind bore of the inlet or outlet and the respective through- hole can form a T-piece.

[0031] In at least one embodiment of a second alternative of the cooling device, it is provided that a first cooling channel inlet of the first cooling channel is fluidically connected to the inlet via an inlet channel of the channel system. In particular, only the first cooling channel inlet, i.e. not also the second cooling channel inlet, is fluidically connected to the inlet of the housing. As a result, at least the cooled cooling fluid can initially only flow into the first cooling plate, which, for example, is to provide prioritized cooling capacity.

[0032] In particular, the inlet and the inlet channel can form a kind of L-piece, within which the cooled cooling fluid can flow from the inlet into the first cooling plate.

[0033] In at least one embodiment of the second alternative, it is provided that a second cooling channel outlet of the second cooling channel is fluidically connected to the outlet via an outlet channel of the channel system. In particular, only the second cooling channel outlet, i.e. not also the first cooling channel outlet, is fluidically connected to the inlet of the housing.

[0034] In particular, the outlet and the outlet channel can form a kind of L-piece, within which the heated cooling fluid can flow from the second cooling plate to the outlet.

[0035] In at least one embodiment of the second alternative, it is provided that the inlet channel is a first blind hole in the housing and the outlet channel is a second blind hole in the housing. Thus, the inlet channel or the outlet channel can be provided particularly easily in the housing.

[0036] A blind hole is a hole that does not completely penetrate the component, in particular the housing, and thus has a certain depth. In particular, the blind hole can be drilled into a main body of the housing using a drill. This advantageously requires little effort and is also less complex.

[0037] In particular, the first blind hole can extend into a top side of the housing, and the second blind hole can extend into a bottom side of the housing, which can be adjacent to the front side of the housing. The inlet or outlet of the housing can be fluidically connected to the blind hole, particularly within the housing. For example, the inlet or the outlet can each comprise a further blind bore, each of which coincides at its deepest point with the respective blind hole of the inlet channel or the outlet channel. In particular, the blind hole of the inlet or outlet and the respective blind hole of the inlet channel or outlet channel can virtually form an L-piece.

[0038] In at least one embodiment of the second alternative, it is provided that a first cooling channel outlet of the first cooling channel is fluidically connected to a second cooling channel inlet of the second cooling channel via a connecting channel of the channel system. This can advantageously ensure that the cooling fluid can flow from the first cooling plate into the second cooling plate. This can be advantageous, for example, if the first cooling plate is to provide prioritized cooling capacity.

[0039] At least one further advantage of the second alternative is that the flow of the cooling fluid is not divided and thus a mass flow of the cooling fluid can be kept constant over its entire course within the cooling device. This can advantageously ensure that both cooling plates are supplied with the same mass flow of cooling fluid. In particular, it can be advantageously ruled out that one of the two cooling plates is unintentionally undersupplied with cooling fluid.

[0040] According to the second alternative, it can therefore be provided that the cooled cooling fluid first flows into the first cooling plate, and then flows from the first cooling plate into the second cooling plate, and from there to the outlet. This allows the two cooling plates to be connected fluidically sequentially, i.e. one after the other.

[0041] In particular, the mass flow of the cooling fluid can be so large that a temperature gradient over the sequential course of the cooling fluid is particularly small. As a result, a cooling capacity that is essentially evenly distributed across the cooling plates can be ensured even with sequentially connected cooling plates.

[0042] In at least one embodiment of the second alternative, it is provided that the connecting channel is a through-hole through the housing. This makes it particularly easy to provide the connecting channel in the housing. In particular, the through-hole extends through the top side and the bottom side of the housing, which can be adjacent to the front side of the housing. In at least one embodiment, it is provided that the channel system is incorporated into the housing by means of a machining manufacturing process. This makes it particularly easy to provide the channel system in the housing. In particular, the channels of the channel system are drilled into a main body of the housing.

[0043] In at least one embodiment, it is provided that the first cooling plate is arranged on the top side of the housing, and the second cooling plate is arranged on the bottom side of the housing opposite the top side. In other words, the first cooling plate is arranged on the top side and the second cooling plate is arranged on the bottom side of the housing, so that the housing is covered in a sandwich-like manner.

[0044] Preferably, the housing comprises fixing elements for fastening the printed circuit board between the first cooling plate and the second cooling plate, so that the printed circuit board can be arranged between the two cooling plates. This has at least the advantage that the electronic component, which is fastened to the printed circuit board, can be cooled both on the top side and on the bottom side. In particular, this can increase the cooling effect for the electronic component.

[0045] In particular, the housing can comprise the fixing elements for the printed circuit board on an inner side of the housing between the top side and the bottom side.

[0046] In at least one embodiment, it is provided that the housing is formed in one piece. In other words, the housing consists of one part and is therefore not composed of several parts. This can significantly reduce the complexity and an assembly time for the cooling device.

[0047] For example, the housing is made from a single main body, which has been formed and / or reshaped into the housing and / or manufactured using machining processes.

[0048] In at least one embodiment, it is provided that the first flow channel and / or the second flow channel comprise a U-shaped course in at least one area. This ensures a longer flow path within the respective cooling plate and thus increases the cooling capacity. In particular, an odd number of U-shaped courses, for example by means of exactly one U-shaped course, can ensure that the inlet and the outlet can be located on a common front side.

[0049] In particular, the respective flow channel can comprise several U-shaped courses, and can accordingly be W-shaped or M-shaped or meander-shaped. The invention also includes combinations of the features of the described embodiments.

[0050] Another aspect of the invention relates to an electronic assembly for a motor vehicle. The electronic assembly comprises a cooling device according to the invention, wherein a printed circuit board carrying the electronic component is fastened to the housing.

[0051] According to at least one embodiment, it is provided that the electronic assembly is a control unit, in particular an electronic control unit (ECU), which can preferably be used for motor vehicles.

[0052] In particular, a vehicle-centric, zone-oriented architecture of the electrical or electronic components of the motor vehicle can be provided for the motor vehicle. In particular, at least one main controller, for example a single main controller, can be provided in such a vehicle architecture, which can also be referred to as the main control unit or vehicle computer, and which can be designed to perform the main computing operations for vehicle-specific applications, for example autonomous driving.

[0053] The main controller may be connected to several, preferably four, zonal controllers, which may also be referred to as zone controllers, by means of signaling technology. Zonal controllers can be designed to perform less demanding computing operations compared to the main computing operations of the main controller.

[0054] For example, the electronic vehicle architecture can be divided into zones, preferably four zones, wherein a zonal controller can be provided for each zone. In particular, the main controller can be connected via the zonal controllers to other electrical and electronic components of the motor vehicle, in particular to smaller, distributed control units, as well as to a large number of sensors and actuators of the motor vehicle.

[0055] Such a vehicle-centric, zone-oriented architecture of the electrical or electronic components can be advantageous at least to the extent that they are less complex than domain-oriented architectures. In particular, the computing operations of the complex, vehicle-specific applications of distributed control units can be consolidated on a single or on a few, very powerful main controllers.

[0056] Preferably, the electronic assembly according to the invention can be a main controller of the motor vehicle. Alternatively, the electronic assembly according to the invention may be a zonal controller of the motor vehicle. Accordingly, the cooling device according to the invention can be provided for cooling the powerful electronic components of a main controller or a zonal controller.

[0057] The electronic component may in particular be a component of the ECU, in particular a SoC, a microchip, a processor, an integrated circuit or the like, wherein the powerful electronic component generates harmful waste heat during operation, which must be dissipated by means of the cooling device.

[0058] A further aspect of the invention relates to a motor vehicle with at least one electronic assembly according to the invention.

[0059] Embodiments of the invention are described below. In the figures:

[0060] Fig. 1 shows a perspective view of a first embodiment of a cooling device according to the invention;;

[0061] Fig. 2 shows a transparent representation of a top view of the first embodiment of the cooling device;

[0062] Fig. 3 shows a sectional view of a side view of the first embodiment of the cooling device;

[0063] Fig. 4 shows an enlarged sectional view of the side view of an inlet of the first embodiment of the cooling device;

[0064] Fig. 5 shows an enlarged sectional view of the side view of an outlet of the first embodiment of the cooling device;

[0065] Fig. 6 shows a representation of a front view of the first embodiment of the cooling device;

[0066] Fig. 7 shows an exploded view of the first embodiment of the cooling device;

[0067] Fig. 8 shows a schematic representation of a second embodiment of a cooling device according to the invention; Fig. 9 shows a transparent representation of a front side of the second embodiment of the cooling device;

[0068] Fig. 10 shows a schematic representation of a motor vehicle according to the invention with an electronic assembly according to the invention.

[0069] The embodiments explained below are preferred embodiments of the invention. In the embodiments, the described components of the embodiments each represent individual features of the invention which are to be considered independently of each other, which also further form the invention independently of each other and are thus also to be regarded as part of the invention individually or in a combination other than that shown. Furthermore, the embodiment described can also be supplemented by other features of the invention already described. In the figures, identical reference signs denote elements with the same function.

[0070] Fig. 1 shows a perspective view of a first embodiment of a cooling device 1 according to the invention for cooling an electronic component 2 of a motor vehicle 3 or an electronic assembly 27 according to the invention with a cooling device 1. The electronic assembly 27 can in particular be an electronic control unit of a motor vehicle.

[0071] Viewed from the outside, the electronic assembly 27 of this embodiment comprises a housing 8 with a lid 28. On a front side 12 of the housing 8, the housing 8 forms both an inlet 10 for a cooling fluid and an outlet 11 for the cooling fluid.

[0072] Fig. 2 shows a transparent representation of a top view of the first embodiment of the cooling device 1. Fig. 3 shows a sectional view of a side view of the first embodiment of the cooling device 1. Fig. 4 shows an enlarged sectional view of the side view of the inlet 10 of the first embodiment of the cooling device 1 and Fig. 5 shows an enlarged sectional view of the side view of the outlet 11 of the first embodiment of the cooling device 1. In the following, Fig. 2 to Fig. 5 are explained all together.

[0073] The cooling device 1 may comprise a first cooling plate 4 with a first cooling channel 6 for a cooling fluid, and a second cooling plate 5 with a second cooling channel 7 for the cooling fluid, wherein the cooling plates 4, 5 are fastened to a housing 8. The first cooling channel 4 and the second cooling channel 5 may comprise a U-shaped course in at least one area 26.

[0074] The housing 8 is in particular in one piece and can form a channel system 9 in its interior, which fluidically connects the first cooling channel 6 and the second cooling channel 7 to one another. The channel system 9 can be machined into the housing 8 using a machining process. The inlet 10 and the outlet 11 are fluidically connected to the channel system 9.

[0075] In the first embodiment, an inlet connection channel 15 of the channel system 9 can be provided, which fluidically connects a first cooling channel inlet 13 of the first cooling channel 6 and a second cooling channel inlet 14 of the second cooling channel 7 in parallel with the inlet 10. In addition, an outlet connection channel 18 of the channel system 9 may be provided, which fluidically connects a first cooling channel outlet 16 of the first cooling channel 6 and a second cooling channel outlet 17 of the second cooling channel 7 in parallel with the outlet 11. For example, the inlet connection channel 15 and the outlet connection channel 18 may be a through-hole through the housing 8.

[0076] For example, the first cooling plate 4 may be arranged on a top side 22 of the housing 8, and the second cooling plate 5 may be arranged on a bottom side 23 of the housing 8 opposite the top side 22. The housing 8 may comprise fixing elements 24 for fastening the printed circuit board 25 between the first cooling plate 4 and the second cooling plate 5, in particular on an inner side 29 of the housing 8.

[0077] In the electronic assembly 27, the printed circuit board 25 with the electronic component 2 is fastened to the housing 8.

[0078] Fig. 6 shows a front view of the first embodiment of the cooling device 1, wherein the inlet 10 and the outlet 11 may be formed on the front side 12 of the housing 8.

[0079] Fig. 7 shows an exploded view of the first embodiment of the cooling device 1. In particular, the sandwich-like structure of the electronic assembly 27 can be recognized here. The housing 8 and the printed circuit board 25 are sandwiched between the first cooling plate 4 and the second cooling plate 5. Fig. 8 shows a schematic representation of a second embodiment of a cooling device 1 according to the invention, wherein the essential features of the first embodiment, with the exception of the different features here, can also apply to the second embodiment. In Fig. 9, a transparent representation of the front side 12 of the second embodiment of the cooling device 1 is shown, wherein Fig. 8 and Fig. 9 are explained together below.

[0080] The first cooling channel inlet 13 of the first cooling channel 6 of the first cooling plate 4 can be fluidically connected to the inlet 10 via an inlet channel 19 of the duct system 9. Similarly, the second cooling channel outlet 17 of the second cooling channel 7 of the second cooling plate 5 can be fluidically connected to the outlet 11 via an outlet channel 20 of the channel system 9. The first cooling channel outlet 16 of the first cooling channel 6 can be fluidically connected to a second cooling channel inlet 14 of the second cooling channel 7 via a connecting channel 21 of the channel system 9. As a result, the cooling plates 4, 5 or the cooling channels 6, 7 can be fluidically connected to each other sequentially.

[0081] The inlet channel 19 and the outlet channel 20 can be a blind hole in the housing 8, and the connecting channel 21 can be a through-hole through the housing 8.

[0082] Fig. 10 shows a schematic representation of a motor vehicle 3 according to the invention with an electronic assembly 2 according to the invention.

Claims

Claims1. Cooling device (1) for cooling an electronic component (2) of a motor vehicle (3), comprising a first cooling plate (4) with a first cooling channel (6) for a cooling fluid, a second cooling plate (5) with a second cooling channel (7) for the cooling fluid, and a housing (8) for fastening a printed circuit board (25) carrying the electronic component (2), wherein the first cooling plate (4) and the second cooling plate (5) are fastened to the housing (8), characterized in that the housing (8) forms a channel system (9) which fluidically connects the first cooling channel (6) and the second cooling channel (7) to one another.

2. Cooling device (1) according to claim 1, characterized in that the housing (8) forms an inlet (10) for the cooling fluid and an outlet (11) for the cooling fluid, wherein the inlet (10) and the outlet (11) are fluidically connected to the channel system (9).

3. Cooling device (1) according to claim 2, characterized in that the inlet (10) and the outlet (11) are formed on a common front side (12) of the housing (8).

4. Cooling device (1) according to claim 3, characterized in that a first cooling channel inlet (13) of the first cooling channel (6) and a second cooling channel inlet (14) of the second cooling channel (7) are fluidically connected in parallel with the inlet (10) via an inlet connection channel (15) of the channel system (9).

5. Cooling device (1) according to claim 3 or 4,characterized in that a first cooling channel outlet (16) of the first cooling channel (6) and a second cooling channel outlet (17) of the second cooling channel (7) are fluidically connected in parallel to the outlet (11) via an outlet connection channel (18) of the channel system (9).

6. Cooling device (1) according to claim 4 and / or 5, characterized in that the inlet connection channel (15) and / or the outlet connection channel (18) are a through-hole through the housing (8).

7. Cooling device (1) according to claim 3, characterized in that a first cooling channel inlet (13) of the first cooling channel (6) is fluidically connected to the inlet (10) via an inlet channel (19) of the channel system (9).

8. Cooling device (1) according to claim 3 or 7, characterized in that a second cooling channel outlet (17) of the second cooling channel (7) is fluidically connected to the outlet (11) via an outlet channel (20) of the channel system (9).

9. Cooling device (1) according to claim 7 and / or 8, characterized in that the inlet channel (19) and / or the outlet channel (20) are a blind hole in the housing (8).

10. Cooling device (1) according to one of claims 3, 7, 8 or 9, characterized in that a first cooling channel outlet (16) of the first cooling channel (6) is fluidically connected to a second cooling channel inlet (14) of the second cooling channel (7) via a connecting channel (21) of the channel system (9).

11. Cooling device (1) according to claim 10, characterized in that the connecting channel (21) is a through-hole through the housing (8).

12. Cooling device (1) according to one of the previous claims,characterized in that the channel system (9) is machined into the housing (8) by means of a machining manufacturing process.

13. Cooling device (1) according to one of the previous claims, characterized in that the first cooling plate (4) is arranged on a top side (22) of the housing (8), and the second cooling plate (5) is arranged on a bottom side (23) of the housing (8) opposite the top side (22), wherein the housing (8) comprises fixing elements (24) for fixing the printed circuit board (25) between the first cooling plate (4) and the second cooling plate (5).

14. Cooling device (1) according to one of the previous claims, characterized in that the housing (8) is formed in one piece.

15. Cooling device (1) according to one of the previous claims, characterized in that the first cooling channel (4) and / or the second cooling channel (5) comprise a II- shaped course in at least one area (26).

16. Electronic assembly (27) for a motor vehicle (3), characterized by a cooling device (1) according to one of the previous claims, wherein a printed circuit board (25) carrying the electronic component (2) is fastened to the housing (8).

17. Electronic assembly (27) according to claim 16, characterized in that the electronic assembly is a control device.

18. Motor vehicle (3), characterized by an electronic assembly (27) according to claim 16 or 17.

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