Control unit, in particular high-voltage inverter for an electric vehicle

Abstract

Control unit (10), in particular a high-voltage inverter (15) for an electrically powered motor vehicle, in particular a high-voltage DC / DC inverter (15), - wherein the control unit (10) comprises a composite housing (20), a control device (25) with power electronics (40) and a heat exchanger (30), - wherein the composite housing (20) encloses a housing interior (31) at least in sections, - wherein the composite housing (20) has a first layer (60) of a dielectric material and a second layer (65) of a metallic material, - wherein the second layer (65) rests at least partially against the first layer (60), - wherein the heat exchanger (30) and the control device (25) are arranged at least in sections in the housing interior (31), - wherein the control device (25) is thermally connected directly or indirectly to the heat exchanger (30), - wherein a cooling medium (140), in particular a cooling liquid, can be guided in the heat exchanger (30), characterized in that - the heat exchanger (30) is arranged between the first layer (60) and the second layer (65) and rests against the first layer (60) and opposite the first layer (60) against the second layer (65), - wherein the second layer (65) is thermally connected to the heat exchanger (30), - wherein the control device (25) is thermally connected to the second layer (65), - wherein the second layer (65) is designed for heat transfer between the heat exchanger (30) and the control device (25).

Description

[0001] The invention relates to a control device according to claim 1, in particular a high-voltage inverter, in particular a high-voltage DC / DC inverter for an electrically powered vehicle.

[0002] An ignition control unit is known from DE 38 37 974 C2.

[0003] A voltage converter is known from US 2020 / 0 053 912 A1.

[0004] DE 199 11 029 A1 discloses a shielded housing for accommodating electronic circuits or components.

[0005] DE 691 15 632 T2 discloses a composition of a dielectric coating.

[0006] DE 10 2017 211 048 A1 shows a housing and a method for producing a housing for a control unit.

[0007] It is an object of the invention to provide an improved control device, in particular an improved high-voltage inverter, in particular a high-voltage DC / DC inverter.

[0008] This object is achieved by means of a control device according to claim 1. Advantageous embodiments are specified in the dependent claims.

[0009] It has been recognized that an improved control unit, in particular an improved high-voltage inverter for an electrically powered motor vehicle, in particular an improved high-voltage DC / DC inverter, can be provided in that the control unit has a composite housing, a control device with power electronics, and a heat exchanger. The composite housing encloses a housing interior at least in sections. The composite housing has a first layer made of a dielectric material and a second layer made of a metallic material. The second layer rests at least in sections against the first layer. The heat exchanger and the control device are arranged at least in sections in the housing interior. The control device is thermally connected directly or indirectly to the heat exchanger. A cooling medium, in particular a cooling liquid, can be guided in the heat exchanger.

[0010] The heat exchanger is arranged between the first layer and the second layer. The heat exchanger is located at the first layer and opposite the first layer, adjacent to the second layer. The second layer is thermally connected to the heat exchanger. The control device is thermally connected (directly or indirectly) to the second layer. The second layer is designed for heat transfer between the heat exchanger and the control device.

[0011] This design has the advantage of providing a particularly short heat transfer path from the control device to the heat exchanger via the second layer. The second layer serves as a heat exchanger between the heat exchanger and the control device and ensures even distribution across the heat exchanger. This ensures reliable cooling and prevents local overheating of the control device.

[0012] Furthermore, the design has the advantage that the composite housing makes the control unit particularly lightweight and cost-effective. In particular, the second layer of metallic material stiffens the composite housing, while simultaneously providing EMC shielding for the power electronics. Furthermore, cooling by means of the heat exchanger prevents thermal overheating of the power electronics.

[0013] In a further embodiment, the second layer, with a second outer side facing away from the housing interior, abuts a first inner side of the first layer facing the housing interior. This configuration has the advantage that the arrangement of the first layer made of the dielectric material on the outside of the second layer provides corrosion protection for the second layer.

[0014] In a further embodiment, a through-opening is arranged in the first layer, extending between a first outer side of the first layer and the first inner side of the first layer. The second layer seals the through-opening in a fluid-tight manner with respect to the housing interior. This configuration has the advantage of providing a fluid-tight base housing, with heat exchange with low heat transfer coefficients being provided at the second layer in the region of the through-opening between an environment and the second layer made of the metallic material.

[0015] In a further embodiment, at least one rib, which is thermally connected to the second layer, is arranged in the through-opening on the second outer side of the second layer. The rib is preferably made of a cast material. This configuration has the advantage that, via the rib, a surface area on the second layer for heat exchange with the environment is enlarged, thereby enabling improved heat exchange between the second layer and the environment.

[0016] In a further embodiment, the heat exchanger is arranged on a second inner side of the second layer facing the housing interior and is thermally connected to the second layer. The control device is arranged on the heat exchanger and thermally connected to the heat exchanger (directly or indirectly). This configuration has the advantage that the housing is particularly rigid, and the heat exchanger is protected from mechanical damage by the two-layer composite housing.

[0017] In a further embodiment, the control device has at least one circuit board on which the power electronics are arranged. The circuit board is mechanically connected to the first layer of the composite housing. This configuration has the advantage of ensuring a mechanically stable hold of the circuit board on the composite housing.

[0018] In a further embodiment, the first layer has at least one first recess, and the second layer has at least one second recess, which is arranged in alignment with the first recess. The heat exchanger extends through the first and second recesses.

[0019] In a further embodiment, the second layer is made of a sheet metal material with a second material thickness of 0.01 mm to 2 mm. It is particularly advantageous if the second layer is deep-drawn or produced using a stamping and bending process. In particular, the second layer is a metallic foil with a material thickness of 0.01 mm to 0.2 mm.

[0020] A particularly rigid composite housing is provided by the fact that the second layer is integrally bonded to the first layer.

[0021] The invention is explained in more detail below with reference to the figures. These show: Fig. 1 shows a partial exploded view of a control unit, in particular a high-voltage inverter, in particular a high-voltage DC / DC inverter, according to a first embodiment for an electrically powered motor vehicle; Fig. 2 a perspective view of a bottom view of the Fig. 1 shown control unit, in particular the high-voltage inverter; Fig. 3 is a partially exploded view of a control device according to a second embodiment; and Fig. 4 a bottom view of a control device according to a third embodiment.

[0022] For ease of understanding, the following figures refer to a coordinate system. The coordinate system has an x-axis (longitudinal direction), a y-axis (transverse direction), and a z-axis (height direction). The coordinate system is designed as a right-hand system, for example.

[0023] Fig. 1 shows a partial exploded view of a control unit 10, in particular a high-voltage inverter 15, in particular a high-voltage DC / DC inverter, according to a first embodiment for an electrically powered motor vehicle.

[0024] The control unit 10 has a composite housing 20, a control device 25, and a heat exchanger 30. The control device 25 can be configured to convert a high voltage in the high-voltage range between two different voltage levels. The high voltage can be a direct voltage that is converted between the two voltage levels. The composite housing 20 encloses, at least in sections, a housing interior 31. The control device 25 and the heat exchanger 30 are arranged in the housing interior 31.

[0025] For example, the control device 25 comprises at least one circuit board 35 and a power electronics 40, wherein the power electronics 40 in Fig. 1 is shown schematically in dashed lines. The power electronics 40 can comprise an array of semiconductor components, for example MOSFETs, which are mounted on the circuit board 35. Furthermore, the circuit board 35 electrically connects the individual components of the array, in particular the power electronics 40, to one another. During operation of the power electronics 40, in particular when the control device 25 converts DC voltages to different voltage levels when operating as a high-voltage DC / DC inverter, the power electronics 40 heats up.

[0026] In this embodiment, the heat exchanger 30 comprises a cooling tube 45. Of course, it is also conceivable that the heat exchanger 30 may be configured differently. In particular, the heat exchanger 30 may have multiple cooling tubes 45 and / or the heat exchanger 30 may be configured, for example, as a plate heat exchanger or in a plate-like configuration. A combination of a cooling tube 45 and a plate heat exchanger would also be possible. The heat exchanger 30 has an inlet 50 and an outlet 55.

[0027] The composite housing 20 has a first layer 60 and at least one second layer 65. The second layer 65 is integrally connected to the first layer 60. In the embodiment, the first layer 60 comprises, for example, a dielectric material. In particular, the first layer 60 can comprise at least one of the following dielectric materials: plastic, thermoplastic, thermosetting, polyethylene. The first layer 60 preferably has a material thickness of 0.01 mm to 2 mm. The first layer 60 can, for example, be injection-molded and / or deep-drawn. Other manufacturing options for the first layer 60 are also conceivable.

[0028] The first layer 60 has a first outer side 70 and a first inner side 75. In the embodiment, the first layer 60 is arranged on the outside of the second layer 65. Of course, it is also possible for the first and second layers 60, 65 to be arranged in reverse, so that the second layer 65 is arranged on the outside of the first layer 60.

[0029] The second layer 65 preferably comprises a metallic material. In particular, the second layer 65 can comprise at least one of the following metallic materials: aluminum, iron, steel, stainless steel, stainless steel, copper, brass, chrome-vanadium steel. In the embodiment, the second layer 65 is, for example, foil-like. The second layer 65 can preferably have a second material thickness of 0.01 to 2 mm, in particular 0.01 mm to 1 mm, in particular 0.01 mm to 0.2 mm. The second layer 65 has a second outer side 80 and a second inner side 85.

[0030] In the embodiment, for example, Fig. 1, the second layer 65 with the second outer side 80 on the first inner side 75. In particular, the second layer 65 can be connected in a material-to-material manner to the first layer 60 on the second outer side 80 with the first inner side 75. In particular, for example, the second layer 65 can be glued to the first inner side 75. It is pointed out that it is of course also possible for the second layer 65 to be arranged on the outside of the first layer 60 and, for example, the second layer 65 is fastened on its second inner side 85, for example, in a material-to-material manner to the first outer side 70. The arrangement that the first layer 60 is on the outside of the second layer 65, as in Fig. 1, has the advantage that the composite housing 20 is particularly lightweight. In particular, a weight reduction of over 60% is possible compared to a housing made entirely of metal.

[0031] The heat exchanger 30 rests on the inside against the second inner side 85 of the second layer 65. By designing the heat exchanger 30 in the exemplary embodiment as a cooling tube 45 with, for example, a circular or elliptical cross-section, the second layer 65 can be shaped on the heat exchanger 30 to correspond to an outer contour 90 of the heat exchanger 30 for guidance and improved heat transfer between the second layer 65 and the cooling tube 45.

[0032] In Fig. 1, a bulge 95 is arranged in the second layer 65, for example, so that the cooling tube 45 partially abuts the second layer 65 over an angular segment of at least 60° to 120°. In addition to reinforcing the second layer, the bulge 95 can also be formed in the first layer 60. Of course, it is also possible to omit the bulge 95 and / or for the cooling tube 45 to abut the second layer 65 in a linear contact. Due to the contact between the second layer 65 and the heat exchanger 30, the second layer 65 is thermally connected to the heat exchanger 30. In addition, the thermal connection between the heat exchanger 30 and the second layer 65 can be improved, for example, by further means, such as a thermally conductive plastic.

[0033] In the vertical direction, the heat exchanger 30 is arranged between the second layer 65 and the control device 25. Preferably, the power electronics 40 is thermally connected directly or indirectly to the heat exchanger 30. The power electronics 40 can be adjacent to the heat exchanger 30 and thermally connected directly to the power electronics 40.

[0034] Alternatively, it is also possible for additional means to be provided for indirect connection, for example, to thermally connect the power electronics 40 to the heat exchanger 30. For example, it is conceivable that a heat spreader, for example in the form of a metal plate, is arranged between the heat exchanger 30 and the power electronics 40. The heat spreader, for example, thermally connects the power electronics 40 to the heat exchanger 30.

[0035] The control device 25, in particular the printed circuit board 35, which carries the power electronics 40, is mechanically connected to the first layer 60, preferably, for example, in a force-locking manner, in particular, for example, with a screw connection. The connecting means is guided through the second layer 65, whereby force transmission between the printed circuit board 35 and the first layer 60 takes place essentially in a force-locking manner.

[0036] In the embodiment, for example, the cooling tube 45 of the heat exchanger 30 is guided in a bow-shaped manner, so that the inlet 50 and the outlet 55 are arranged, for example, on a common side surface 100 of the composite housing 20. On the side surface 100, the first layer 60 has a first recess 105 and the second layer 65 has a second recess 110, wherein the first recess 105 and the second recess 110 are arranged substantially flush with one another. A first section 115 of the cooling tube 45 is guided through the composite housing 20 at the first and / or second recess 105, 110. In this case, the composite housing 20 can be sealed, for example, at the first and / or second recess 105, 110, so that a fluid-tight housing interior 31 can be provided.

[0037] Analogous to the first section 115, a second section 120 extends through a third recess 125 in the first layer 60 and a fourth recess 130 in the second layer 65, wherein the third and fourth recesses 125, 130 are aligned with one another. The second section 120 can end at the outlet 55 of the heat exchanger 30.

[0038] Fig. 2 shows a perspective view of a bottom view of the Fig. 1 shown control unit 10, in particular the high-voltage inverter 15.

[0039] For example, the first layer 60 of the composite housing 20 has a through-opening 135. The through-opening 135 can, for example, have a rectangular cross-section. The through-opening 135 is arranged, for example, in the z-direction within the guide of the cooling tube 45. In particular, the outer contour 90 of the cooling tube 45 can enclose a surface in which the through-opening 135 is arranged within a projection in the z-direction.

[0040] In this embodiment, the through-opening 135 extends exclusively through the first layer 60 between the first outer side 70 and the first inner side 75. However, the through-opening 135 is not arranged in the second layer 65. The second layer 65 covers the through-opening 135 on the inside, so that the second layer 65 seals the through-opening 135 in a fluid-tight manner. In particular, the second layer 65 is designed to be uninterrupted and plate-shaped in the region of the through-opening 135.

[0041] The following are the Fig. 1 and Fig. 2. During operation of the control unit 10, in particular as a high-voltage inverter 15, in particular as a high-voltage DC / DC inverter, the power electronics 40 heats up and provides heat Q. In the embodiment, the heat Q is transferred from the power electronics 40 to the heat exchanger 30, for example, to the outer contour 90 of the cooling tube 45. The heat spreader can be coupled into a heat flow between the power electronics 40 and the heat exchanger 30.

[0042] In the embodiment, a cooling medium 140 is fed into the heat exchanger 30 via the inlet 50. The cooling medium 140 can be, for example, a gas and / or a fluid.

[0043] In particular, it is possible for the cooling medium 140 to be a coolant of the vehicle. The cooling medium 140 is guided through the heat exchanger 30, wherein a first portion of the heat Q is transferred from the heat exchanger 30 to the cooling medium 140, thereby heating the cooling medium 140. The heated cooling medium 140 is guided out of the control unit 10 via the outlet 55. The heated cooling medium 140 can be guided further in the vehicle to a vehicle radiator in order to cool the cooling medium 140 again and to release the heat Q introduced into the cooling medium 140 to the surroundings of the vehicle.

[0044] The heat exchanger 30, as already explained above, lies against the second inner side 85 of the second layer 65. The thermal connection of the cooling tube 45 to the second layer 65 is particularly good through the bulge 95. A second part of the heat Q is transferred from the heat exchanger 30 to the second layer 65. The metallic material makes the second layer 65 particularly thermally conductive. The second layer 65 transfers the second part of the heat Q in the direction of the through-opening 135. At the through-opening 135, the second part of the heat Q is dissipated to the environment, for example by convection, at the second outer side 80 exposed within a contour of the second through-opening 135.

[0045] The Fig. 1 and Fig. The control unit 10 shown in Figure 2 can be manufactured, for example, by inserting the second layer 65 into a mold in film-like fashion and casting, for example, injection-molding, the dielectric material of the first layer 60 onto the second layer 65. After the dielectric material has solidified, the composite housing 20 is subsequently removed from the mold, and the heat exchanger 30 and the control device 25 are installed in the housing interior 31. For this purpose, the printed circuit board 35 can be mechanically fastened, for example, screwed, to the first layer 60.

[0046] Fig. 3 shows a partially exploded view of a control unit 10 according to a second embodiment.

[0047] The Fig. The control unit 10 shown in Figure 3 is essentially identical to the one shown in Fig. 1 and Fig. 2 shown control unit 10. In the following, only the differences of the Fig. 3 shown control unit 10 compared to the one shown in the Fig. 1 and Fig. 2 shown control unit 10.

[0048] Deviating from Fig. 1 is in Fig. 3, the second layer 65 is made of a thin-walled sheet material. As a result, the second layer 65 can have a box-shaped configuration. In particular, it is conceivable, for example, that the second layer 65 is deep-drawn or stamped and bent. This is clearly shown in Fig. 3 the arrangement of the second and fourth recesses 110, 130 in the second layer 65 can be seen.

[0049] Furthermore, in deviation from Fig. 1, the cooling tube 45 is arranged in the z-direction between the first layer 60 and the second layer 65. The first layer 60 can be shaped in the region of the heat exchanger 30 to correspond to the outer contour 90 and, for example, have the bulge 95, so that the cooling tube 45 lies flat against the first layer 60.

[0050] The second layer 65 can be shaped to correspond to the outer contour 90 of the cooling tube 45 and have an indentation 155. The second layer 65 rests with the second outer side 80 against the outer contour 90 of the heat exchanger 30, in particular the cooling tube 45, and is thermally connected to the heat exchanger 30. As a result, the power electronics 40 is indirectly connected to the heat exchanger 30 via the second layer 65 and, if applicable, the heat spreader.

[0051] In the embodiment, the second layer 65 is made of a thin-walled sheet material, for example, deep-drawn. Of course, it is also possible for the second layer 65 to be stamped. The second material thickness of the second layer 65 is Fig. 3 is significantly thicker than the foil-like design of the second layer 65 in Fig. 1. In particular, the second layer 65 can, for example, have the second material thickness of 0.01 mm to 2 mm, in particular 0.01 mm to 1 mm. By designing the second layer 65 from the thin-walled sheet material, the first layer 60 can be thinner-walled than in Fig. 1. In particular, the first wall thickness of the first layer can be compared to the Fig. 1. The first wall thickness can be 0.01 mm to 2 mm. This means that the material required to produce the first layer 60 is lower than in Fig. 1. This makes the composite housing 20 particularly easy to recycle.

[0052] In this embodiment, the second layer 65 is integrally bonded to the first layer 60. In the areas where the second layer 65 does not contact the heat exchanger 30, the second layer 65 essentially abuts the first layer 60 on the second outer side 80, thereby establishing a good mechanical connection between the first layer 60 and the second layer 65. The heat exchanger 30 is thereby mechanically secured between the first layer 60 and the second layer 65.

[0053] In the embodiment, the power electronics 40 is directly adjacent to the second layer 65, for example. Additionally or alternatively, it is conceivable that the power electronics 40 is thermally connected indirectly, for example, by means of a heat spreader, to the second layer 65. The heat spreader can be adjacent to the power electronics 40 on the one hand and to the second inner side 85 of the second layer 65 on the other hand.

[0054] In Fig. 3, during operation, the power electronics 40 provides the heat Q. The heat Q is transferred from the power electronics 40 to the second layer 65 directly and / or indirectly, for example by means of the heat spreader. The second layer 65 transfers the first part of the heat Q to the heat exchanger 30. In the heat exchanger 30, the cooling medium 140 is heated with the first part of the heat Q, and the first part of the heat Q is dissipated from the control unit 10. The second part of the heat Q is dissipated by the second layer 65 at the through-opening 135 to the environment of the control unit 10.

[0055] The Fig. The control unit 10 shown in Figure 3 can be manufactured, for example, by producing the second layer 65 from the thin-walled sheet material, for example, by deep-drawing and stamping. The second layer 65 is placed into a mold together with the heat exchanger 30. The first layer 60 is cast, for example, injection-molded, with the dielectric material onto the second layer 65 and the heat exchanger 30. After the dielectric material has solidified and hardened, the composite housing 20, together with the heat exchanger 30, is removed from the mold, and the control device 25 is installed in the housing interior 31. For this purpose, the printed circuit board 35 can be mechanically fastened to the first layer 60, for example, by screwing.

[0056] It is also possible for the first layer 60 to be manufactured separately from the second layer 65 and the heat exchanger 30. In particular, a casting process, such as an injection molding process, is conceivable for manufacturing the first layer 60. After the first layer 60 has been manufactured, the heat exchanger 30 and the second layer 65 are inserted into the first layer 60. The second layer 65 and, if applicable, the heat exchanger 30 can be integrally bonded to the first layer 60, for example, by adhesive bonding, thereby ensuring reliable retention of the heat exchanger 30 between the first layer 60 and the second layer 65.

[0057] Fig. 4 shows a bottom view of a control device 10 according to a third embodiment.

[0058] The control unit 10 is essentially identical to the one shown in Fig. 1 or in Fig. 2 shown embodiment of the control unit 10. In the following, only the differences between the Fig. 4 compared to the third embodiment shown in Fig. 1 and Fig. 2 described first embodiment of the control unit 10. It is pointed out that the Fig. 4 described third embodiment also with the in Fig. 3 described second embodiment.

[0059] In addition, at least one rib arrangement 145 is arranged on the second outer side 80 of the second layer 65 in the through-opening 135. The rib arrangement 145 has at least one rib 150, preferably a plurality of spaced-apart ribs 150. The ribs 150 can, for example, be as shown in Fig. 4 can be elongated and can be arranged at a distance from one another, for example in the transverse direction (y-direction).

[0060] Each of the ribs 150 is preferably attached to the second layer 65 and thermally connected to the second layer 65. The rib 150 can be formed, for example, from a thermally conductive material, such as a thermally conductive plastic. In particular, it is possible for the rib 150 to be printed or cast on.

[0061] During operation of the control unit 10, as in the context of Fig. 2, the second part of the heat Q is transported via the second layer 65 to the through-opening 135 and is released to the environment of the control unit 10 at the through-opening 135, for example by means of convection at the second layer 65 and the fins 150 arranged on the second layer 65. The fin arrangement 145 arranged in the through-opening 135 increases the surface area for releasing the second part of the heat Q to the environment, so that the fin arrangement 145 allows the second part of the heat Q, which is released via convection from the second layer 65, to be released in comparison to the Fig. 2 is enlarged.

[0062] The Fig.The embodiment of the control unit 10 shown in Figures 1 to 4 has the advantage that the control device 25, in particular the power electronics 40, is enclosed in the housing interior 31, preferably in a fluid-tight manner, to protect it from external influences. Additionally, the second layer 65, due to its metallic material, ensures EMC shielding both toward the power electronics 40 and from the power electronics 40 to the environment of the control unit 10.

[0063] Reliable cooling of the power electronics 40 is ensured by the dissipation of heat Q via the heat exchanger 30 and via the second layer 65 at the through-opening 135. Because, in addition to the heat exchanger 30, passive cooling of the power electronics 40 is also provided via the second layer 65 at the through-opening 135, safe operation of the control device 25 can be ensured, possibly with limited performance, even in the event of a failure, for example, of a feed pump for the cooling medium 140.

[0064] Furthermore, the control unit 10 is manufactured particularly simply from a few components, so that the control unit 10 is particularly cost-effective overall. List of reference symbols 10 Control unit 15 high-voltage inverters 20 composite housings 25 Control device 30 heat exchangers 31 Housing interior 35 circuit board 40 Power electronics 45 Cooling pipe 50 admission 55 Outlet 60 first layer 65 second layer 70 first outside 75 first inside page 80 second outside 85 second inside page 90 outer contour 95 bulge 100 side area 105 first recess 110 second recess 115 first section 120 second section 125 third recess 130 fourth recess 135 passage opening 140 Cooling medium 145 rib arrangement 150 ribs 155 indentation Q Heat

Claims

[1] Control device (10), in particular a high-voltage inverter (15) for an electrically driven motor vehicle, in particular a high-voltage DC / DC inverter (15), - wherein the control unit (10) comprises a composite housing (20), a control device (25) with power electronics (40) and a heat exchanger (30), - wherein the composite housing (20) encloses a housing interior (31) at least in sections, - wherein the composite housing (20) has a first layer (60) of a dielectric material and a second layer (65) of a metallic material, - wherein the second layer (65) rests at least partially against the first layer (60), - wherein the heat exchanger (30) and the control device (25) are arranged at least in sections in the housing interior (31), - wherein the control device (25) is thermally connected directly or indirectly to the heat exchanger (30), - wherein a cooling medium (140), in particular a cooling liquid, can be guided in the heat exchanger (30), characterized by , that - the heat exchanger (30) is arranged between the first layer (60) and the second layer (65) and rests against the first layer (60) and opposite the first layer (60) against the second layer (65), - wherein the second layer (65) is thermally connected to the heat exchanger (30), - wherein the control device (25) is thermally connected to the second layer (65), - wherein the second layer (65) is designed for heat transfer between the heat exchanger (30) and the control device (25). [2] Control device (10) according to claim 1, - wherein the second layer (65) bears with a second outer side (85) facing away from the housing interior (31) against a first inner side (75) of the first layer (60) facing the housing interior (31). [3] Control device (10) according to claim 2, - wherein a through-opening (135) is arranged in the first layer (60), which through-opening extends between a first outer side (70) of the first layer (60) and the first inner side (75) of the first layer (65), - wherein the second layer (65) closes the through opening (135) fluid-tight with respect to the housing interior (31). [4] Control device (10) according to claim 3, - wherein on the second outer side (80) of the second layer (65) in the through-opening (135) at least one rib (150) is arranged, which is thermally connected to the second layer (65), - wherein the rib (150) is preferably made of a cast material. [5] Control device (10) according to one of the preceding claims, - wherein the control device (25) has at least one printed circuit board (35) on which the power electronics (40) are arranged, - wherein the printed circuit board (35) is mechanically connected to the first layer (60) of the composite housing (20). [6] Control device (10) according to one of the preceding claims, - wherein the first layer (60) has at least one first recess (105) and the second layer (65) has at least one second recess (110) arranged in alignment with the first recess (105), - wherein the heat exchanger (30) extends through the first and second recesses (105, 110). [7] Control device (10) according to one of the preceding claims, - wherein the second layer (65) is made of a sheet material with a second material thickness of 0.01 mm to 2 mm, - and / or - wherein the second layer (65) is a metallic foil with a material thickness of 0.01 mm to 0.2 mm. [8] Control device (10) according to one of the preceding claims, - wherein the second layer (65) is integrally connected to the first layer (60).

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