Housing and electronic power device

Abstract

The invention relates to a housing (10) for an electronic power device (1) of an electric powertrain, for example for an inverter, the housing (1) comprising a body (13) including a bottom (11) and a set of peripheral walls (12) which define, together with the bottom, a recess (15) which is capable of receiving components (20) of the electronic power device, as well as a cover (14) which covers this recess (15) when the housing (10) is closed, and wherein the housing comprises at least one bearing element which is arranged so as to deform the cover when the housing (10) is closed.

Description

DESCRIPTION TITLE: POWER ELECTRONIC BOX AND DEVICE TECHNICAL FIELD OF THE INVENTION

[0001] The invention relates, in general, to the technical field of electronic power devices for electric powertrains, for example for motor vehicles. It relates more specifically, although not exclusively, to voltage inverter housings. STATE OF THE PRIOR ART

[0002] The emergence of the use of electric motor vehicles as an alternative to or in addition to thermal engines requires the use of an increasing number of electronic components. In particular, the use of inverters is necessary for electrically powered motor vehicles using electric batteries. Indeed, the electric motors used in electric or hybrid motor vehicles generally consist of electromechanical converters, synchronous or asynchronous, whose operation most often requires the use of three-phase alternating currents. However, the electric batteries of these vehicles deliver direct currents, which must then be converted into alternating currents. An inverter positioned near an electric motor within an electric powertrain allows, among other things, the transformation of direct current into alternating current.

[0003] Since an inverter is made up of fragile sub-components that are poorly suited to the external conditions of a motor vehicle engine, these components are generally protected by a housing housed in a dedicated location within the powertrain. Such a housing generally comprises a rigid body on which a cover is superimposed to isolate the electrical components located in its interior space.

[0004] When an electric or hybrid motor vehicle is in operation, vibrations, for example from the vehicle's mechanical reducers or from electromagnetic forces operating within the electric motor of the powertrain, are transmitted to the housing and the cover is then likely to vibrate like a loudspeaker. The vibrations cause noise pollution in the environment close to the vehicle or for users located in the passenger compartment of said vehicle.

[0005] To solve this problem, it is known to decouple the cover and the body of the case by inserting an elastic material between the body and the cover of the case. Such a solution is for example described in document JP2020169572.

[0006] This solution allows the resonant frequency of the cover to be reduced, but it turns out that on electric powertrain inverter boxes, this resonant frequency is still too high and the nuisances linked to cover vibrations are still bothersome.

[0007] It is also known to have support elements inside the housing intended to support the cover. Such a solution, described for example in document US2020 / 0413556, makes it possible to increase the modal frequency of the cover and thus reduce vibrations but requires the implementation of assembly means between the cover and support elements to prevent any axial relative movement between the cover and the support element.

[0008] This solution is therefore not completely satisfactory. STATEMENT OF THE INVENTION

[0009] The invention aims to remedy all or part of the drawbacks of the state of the art by proposing a simple solution making it possible to avoid vibration amplification phenomena by reducing the emissivity of the cover of a power electronic device housing such as an inverter housing.

[0010] To this end, a housing is proposed for an electronic power device of an electric powertrain, for example for an inverter, the housing comprising: - a body comprising a base and a set of peripheral walls defining with the base a housing capable of receiving components of the electronic power device, - a cover covering this housing when the box is closed.

[0011] According to a first aspect of the invention, the housing comprises at least one support element arranged so as to deform the cover when the housing is closed.

[0012] Thus, in comparison with the solutions of the known prior art, it is possible to increase the modal frequency of the cover without implementing fixing means between the support element and the cover, because the deformation of the cover, for example its bending, ensures that the support element and the cover remain in contact. The solution is therefore simpler.

[0013] "Deforming" means changing the shape of the cover between a resting state, for example when it is removed from the body, and a "positioned" state in which it completely covers the housing. The change in shape may be, for example, bending or curving of the cover...or any other geometric modification of the surface of the cover.

[0014] The invention may further comprise one or more of the following features:

[0015] - Each support element extends between the body and the cover.

[0016] - Each support element is carried by one of the cover and the body and extends, when the case is closed, to the other of the cover and the body so as to deform the cover.

[0017] - The cover cooperates with the set of peripheral walls to close the box.

[0018] - The cover can be assembled in a removable or non-removable manner on the set of peripheral walls.

[0019] - Fasteners such as screws or rivets hold the cover to the case body when the case is closed.

[0020] - The cover, in particular its peripheral edge, is pressed against the peripheral wall assembly, in particular the edge of the peripheral wall assembly opposite the bottom, when the case is closed.

[0021] - The set of peripheral walls defines, opposite the bottom, an opening, the opening being closed by the cover when the box is closed.

[0022] - Each support element is sized so that a deformation of the cover is necessary to close the box.

[0023] - The support element or each support element comprises a support portion cooperating with a thrust zone of the cover to deform it.

[0024] - Each support element comprises a support portion cooperating with the cover to deform it, each support element being dimensioned so that permanent or uninterrupted contact is ensured between the cover and the support portion of the support element regardless of the excitation frequency of the cover.

[0025] - Advantageously, the cover is prestressed by the support element(s) and each support element is sized so as to generate a deformation strictly greater than the vibratory displacement of the cover in the absence of a support element.

[0026] For example, the displacement of the cover under the pressure of the support element may be one to two times greater than the vibrational displacement of the cover in the absence of a support element, for example 1.2 or 1.4 times greater.

[0027] - The support element is machined before the housing is closed. Preferably, the support element is already associated with the body when it is machined.

[0028] - The machining step allows the dimensions of the support element to be adapted to different vibration frequencies to be treated.

[0029] - Each support element is subjected to compression between the cover and the body. In other words, the elastic deformation of the cover generates an elastic restoring force which presses the cover against the support element and / or the support element against the body.

[0030] - According to another embodiment, each support element is subjected to traction between the cover and the body. In other words, the elastic deformation of the cover generates a restoring force which pulls the support element out of the body.

[0031] - The support element or each support element comprises a pillar, one end of which is connected to the bottom of the body and another end of which forms a branch comprising at least two branches, the ends of which are in contact with the cover when the case is closed.

[0032] - The or each portion of support is punctual.

[0033] - The or each portion of support is linear.

[0034] - The or each support portion is surface-based.

[0035] - The support element has a bar or rod shape and the support portion between the support element and the cover is punctual.

[0036] - The support element has the shape of a plate, two opposite edges of which are in contact with the body and the cover, and the support portion between the support element and the cover is linear.

[0037] - The support element is a solid or a prism and the support portion between the support element and the cover is surface.

[0038] - Each support element is secured to the body before closing the box and extends to the cover when the box is closed.

[0039] - Each support element is secured to the cover before closing the case and extends to the body when the case is closed.

[0040] - Each support element is carried by the body and extends to the cover when the case is closed.

[0041] - According to one embodiment, each support element is formed from a single piece with the body, in particular with the base.

[0042] - Each support element extends from the bottom of the body to the cover.

[0043] - The support element is a body element protruding from the bottom of the housing body. For example, the support element is a rod, a barrel or a plate.

[0044] - Each support element extends substantially perpendicular to the bottom of the body.

[0045] - According to one embodiment, the housing comprises at least two support elements connecting the body and the cover.

[0046] - According to one embodiment, the housing comprises as many support elements as the cover has vibratory antinodes in the absence of a support element.

[0047] - According to another embodiment, each support element extends from a wall of the set of peripheral walls of the body to the cover when the housing is closed.

[0048] - Preferably, each support portion is located so that on at least one straight line passing through the center of inertia of the cover and through a point of the support portion, the point of the support portion is closer to the center of inertia of the cover than to the nearest edge of the cover. This arrangement makes it possible to treat at least the first mode of vibration, which is the most frequent.

[0049] - Each support portion is located so that on any straight line passing through the center of inertia of the cover and through a point on the support portion, the point on the support portion is closer to the center of inertia of the cover than to the nearest edge of the cover.

[0050] - The cover has a flexible plate-shaped portion

[0051] - According to one embodiment, the cover has substantially the shape of a flexible plate.

[0052] - According to one embodiment, each support element extends between the flexible plate and the body,

[0053] - According to one embodiment, the cover can be bent or curved towards the bottom.

[0054] - Alternatively, the lid may be bent or curved in a direction opposite to the bottom.

[0055] - According to one embodiment, each support element is a finger formed in the cover and extending to the body of the housing, for example to the bottom of the body. In other words, the support element can also be formed in the cover. If necessary, the support element forms a portion of the cover. In other words, the support element also provides a function of closing the housing and / or sealing.

[0056] - Advantageously, the finger is hollow, the interior volume of the finger communicating with the exterior of the case.

[0057] - According to one embodiment, the cover is made of sheet metal and the finger is formed directly in the sheet metal of the cover.

[0058] - This finger can have a truncated cone shape extending to the bottom of the body.

[0059] - According to one embodiment, the support element is removable.

[0060] - According to one embodiment, the distance between the bottom of the body and the support portion is adjustable, before or after closing the case.

[0061] - According to one embodiment, one of the end of the support element and the bottom comprises a thread, and the other of the end of the support element and the bottom comprises a tapping, the thread cooperating with the tapping. Thus, it is possible to adjust the deformation of the cover and thus modify its natural frequency.

[0062] - According to one embodiment, the support element is formed on a separate part of the body and the cover and can be inserted after the cover has been placed on the body.

[0063] - Where appropriate, the cover has a hole through which the support element passes, the support element having one end secured to the bottom and the opposite end of the support element comprising a head wider than the hole, the support portion being located at the interface between the head and the cover.

[0064] According to one embodiment, the cover comprises a relief cooperating with the support element.

[0065] According to one embodiment, the cover is made of sheet metal and the relief has a baffle shape formed directly in the sheet metal of the cover.

[0066] According to another embodiment, the cover may be made from a thermoplastic material, in particular by molding.

[0067] The invention also relates to a power electronic device, for example an inverter, comprising a housing as described previously.

[0068] According to one embodiment, the power electronic device comprises a card on which the electronic components are arranged, the card comprising at least one opening, each opening being crossed by a corresponding support element.

[0069] According to one embodiment, each support element is arranged in the housing before the case is closed. This makes it easier to provide a waterproof case.

[0070] According to another aspect, the invention also relates to a powertrain comprising a power electronic housing or device as defined previously.

[0071] According to another aspect, the invention also relates to a method of manufacturing a housing as described above, the method comprising a step of machining or cutting the support element.

[0072] According to one embodiment, the support element is carried by the body and the cutting or machining step is carried out once the support element is associated with the body. Thus, the deformation of the cover can be determined more precisely (no assembly tolerance to take into account).

[0073] Other characteristics and advantages of the invention are highlighted by the following description of non-limiting examples of embodiments of the different aspects of the invention. BRIEF DESCRIPTION OF THE FIGURES Other characteristics and advantages of the invention will emerge from reading the following description, with reference to the appended figures, which illustrate: Figure 1: a block diagram of a known power electronic device. Figure 2: a block diagram of a first embodiment of the invention, Figure 3: a block diagram of the body of the housing of the first embodiment of the invention, seen from above, according to a first variant, Figure 4: a schematic diagram of the body of the housing of the first embodiment of the invention, seen from above, according to a second variant, Figure 5: a block diagram of a second embodiment of the invention, Figure 6: a block diagram of the body of the second embodiment of the invention, seen from above, Figure 7: a block diagram of a third embodiment of the invention, Figure 8: a block diagram of a fourth embodiment of the invention, Figure 9: a basic diagram, seen from above, of the third and fourth embodiments, according to a first variant. Figure 10: a basic diagram, seen from above, of the third and fourth embodiments, according to a second variant. Figure 11: a basic diagram, seen from above, of the third and fourth embodiments, according to a third variant. Figure 12: a block diagram of a fifth embodiment of the invention, Figure 13: a block diagram of a sixth embodiment of the invention, Figure 14: a block diagram of a seventh embodiment of the invention, Figure 15: a block diagram of an eighth embodiment of the invention, Figure 16: A block diagram of a ninth embodiment of the invention.

[0074] For greater clarity, identical, similar or similar elements with the same function are identified by identical reference signs throughout the figures. In the description and the foregoing, the expression "each support element" refers to embodiments with a single support element, or several, for example two, three or four. DETAILED DESCRIPTION OF AN EMBODIMENT

[0075] Figure 1 schematically illustrates a housing 10 of an inverter of the prior art, the housing 10 comprising: - a background 11, - a set of peripheral walls 12 defining with the bottom a housing 15 inside which the electronic components 20 of the inverter are housed, - a cover 14 covering this housing 15.

[0076] Normally, vibrations related to gears, electromagnetic forces and inverter operation are transmitted to the inverter housing 10. The cover 14 of the inverter housing 10 has a significant surface area and can therefore act as a loudspeaker to diffuse the noise, as shown schematically in Figure 1. The amplitude H of the vibration can be between 0.1 mm and 0.6 mm, or even more.

[0077] With reference to Figures 2 to 16, different embodiments of the invention are schematically illustrated. In each case, the housing 10 of the inverter 1 may have a generally parallelepiped shape, it being understood that it may have any other geometric shape. The set of peripheral walls 12 defines, opposite the bottom 11, an opening, this opening being closed by the cover 14 when the box 10 is closed.

[0078] Given the nature of the power electronic device and to protect it from any residual dust, the case is preferably waterproof.

[0079] The cover 14 preferably cooperates with the set of peripheral walls 12 to close the housing. Although not shown in Figures 2 to 16, the cover may be assembled on the set of peripheral walls. irremovably, for example with rivets or welding, or removably, for example with screws.

[0080] The cover 14 has at least one portion in the form of a flexible plate. When the support element 25 is associated with the body 13 before the housing is closed, the cover 14 as a whole may have the form of a flexible plate. The flexible plate may in particular be made of sheet metal or plastic or polymer.

[0081] In the embodiments of Figures 2 to 14, each support element is stressed in compression between the cover and the body. In other words, the elastic deformation of the cover generates a restoring force which presses the support element against the body. The cover is curved (or flexed) towards the outside of the housing.

[0082] In the embodiments of Figures 1 to 12, the support element is integral, before closing the housing, with the body 13, and it extends to the cover 14 when the housing is closed. In particular, each support element 25 can be formed in a single piece with the body 13. Each support element 25 is stressed in compression between the cover 14 and the body 13.

[0083] In the embodiments of Figures 13 to 15, the support element is integral, before closing the case, with the cover, and it extends to the body 13, in particular, to the bottom 11, when the case is closed. Where appropriate, the body 13 can be made of steel, plastic or polymer with the use of a metal insert.

[0084] Figure 2 shows a diagram of a first embodiment of a housing 10 for an electronic power device 1 of an electric powertrain, for example for an inverter.

[0085] This box includes: - a body 13 comprising a base 11 and a set of peripheral walls 12 defining with the base a housing 15 capable of receiving components 20 of the electronic power device, - a cover 14 covering this housing 15 when the box 10 is closed.

[0086] The housing comprises a support element 25 extending between the body 13 and the cover 14. This support element is arranged and dimensioned so as to deform the cover 14 when the housing 10 is closed. Thus, the amplitude h of the vibrations is significantly reduced, or even eliminated.

[0087] In this first embodiment, the support element 25 is carried by the body 13. 11 extends, once the housing 10 is closed, to the cover, deforming it. The support element 25 extends substantially perpendicular to the bottom 11 of the body 13. The support element thus deforms the flexible plate of the cover 14.

[0088] When the housing 10 is closed, the peripheral edge of the cover 14 is pressed against the set of peripheral walls 12, in particular against the edge of the set of peripheral walls which is opposite the bottom 11.

[0089] The support element 25 is dimensioned such that a deformation of the cover 14 is necessary to seal the housing. In other words, the dimensioning of the support element is such that it is impossible to close the housing without bringing the cover and the support element into contact by bending the cover.

[0090] The maximum displacement (or deflection) f of the cover can for example be between 0.05 and 1 mm, in particular between 0.1 and 0.5 mm.

[0091] The support element 25 may be formed in one piece with the body 13 of the housing, in particular with the bottom. If necessary, the body may be made of steel. machined or any other material capable of supporting the forces transmitted by the support element.

[0092] According to a variant, the support element 25 can be manufactured on a separate part and fixed to the bottom by welding, screwing, or gluing. In the case of screwing, the support element 25 can have the shape of a rod or bar, one end of which is directly threaded and screwed into a tapped hole made in the bottom 11 of the body 13.

[0093] The support element 25 comprises a support portion 250 on which elastic return forces of the deformed cover are applied at least in part.

[0094] The support element 25 has a height h2 greater than the height hl of the walls of the set of peripheral walls 12.

[0095] The support element 25 is dimensioned so that permanent or uninterrupted contact is ensured between the cover 14 and the support portion of the support element. Preferably, this contact is permanent or uninterrupted regardless of the excitation frequency of the cover.

[0096] Figures 3 and 4 schematically represent a housing body 13 inside which is mounted a card 40 on which the electronic components of the power electronic device are arranged. The card comprises an opening 41 crossed by a corresponding support element 25.

[0097] The support element 25 may have the shape of a vertical bar or rod. Where appropriate, the support portion is substantially point-shaped. Point-shaped is understood to mean a support portion whose surface area is less than or equal to 1 cm 2 The support element may have the shape of a plate. The support portion is thus formed by one of the edges of the plate and two opposite edges of the plate are in contact with the body 13 and the cover 14 respectively. Where appropriate, the support portion is substantially linear. By linear is meant a support portion whose length is at least ten times greater than the width.

[0098] Figures 5 and 6 schematically show a second embodiment using two support elements 25. The two support elements 25 connect the body 13 and the cover 14.

[0099] Each support element 25 has the shape of a rod or a bar. The two support elements 25 are dimensioned so that they are both in contact with the cover 14. To obtain a homogeneous deformation of the cover 14, the height of the support elements 25 can be different depending on their positioning in the housing. The card comprises two openings each crossed by a support element 25.

[0100] Figure 7 shows another embodiment in which the support element 25 comprises a pillar 26, one end of which is connected to the bottom 11 of the body 13 and another end of which forms a branch comprising at least two branches T1, the ends of which are in contact with the cover 14 when the housing is closed.

[0101] The two branches T1 are sized so that they are both in contact with the cover 14. To obtain a homogeneous deformation of the cover 14, the height of the branches T1 can be different depending on the location of their positioning in the housing.

[0102] According to a first variant, the branches T1 and the pillar 26 each have the shape of a rod. The support element thus takes the shape of a Y.

[0103] Figure 8 schematically shows another embodiment. In this embodiment, the support elements are each connected to one of the walls of the set of walls 12. When the housing is closed, each support element extends here from one of the walls of the set of peripheral walls 12 to the cover 14. The support elements extend obliquely relative to a direction perpendicular to the bottom 11 of the housing so as to approach the center of inertia of the cover.

[0104] The connection between each support element 25 and the set of peripheral walls 12 is preferably made in an area located halfway up the wall. 12, the height being taken in a direction perpendicular to the bottom 11 in the direction of the cover 14.

[0105] Figures 9, 10 and 11 show three alternative embodiments applicable in particular to the two embodiments of Figures 7 and 8. They schematically show three top views of the support portion of the support element 25 cooperating with the cover 14 according to three alternative embodiments.

[0106] According to the variant of figure 9, the support portions are punctual because the branches 27 of the support element 25 of figure 7 or the support elements 25 of figure 8 have the shape of a rod or bar.

[0107] According to the variant of Figure 10, the support portions are linear because the branches 27 of the support element 25 of Figure 7 or the support elements 25 of Figure 8 have a plate shape.

[0108] According to the variant of figure 11, the support portions are surface-like because the branches T1 of the support element 25 of figure 7 or the support elements 25 of figure 8 have the shape of a solid or a prism.

[0109] Figure 12 shows another embodiment in which the support element 25 is secured, before closing the housing, to the body 13.

[0110] The support element 25 can be formed in one piece with the base or be formed in an attached part, for example screwed, glued, riveted or snapped.

[0111] The cover 14 comprises a relief 141 cooperating with the support element 25. The cover is made of sheet metal and the relief 141 is a baffle formed directly in the sheet metal of the cover 14. According to a variant, the cover and its relief can be molded in plastic.

[0112] This embodiment can be advantageous in that the deformation of the cover can be adjusted not only by adjusting the height of the support element, but also by varying the depth p of the relief. It is thus possible, from two identical housing bodies, to modify the level of deformation of the cover by modifying the depth of each relief. Thus, two separate housings, each having a cover with a distinct natural frequency, can be obtained with the same housing body. A range of housings having covers with distinct natural frequencies can be obtained without modifying the housing body. The relief can also have a stiffening function, which is advantageous in the context of the invention. The relief can, for example, be obtained by stamping the sheet metal when the cover is made of sheet metal.

[0113] Figures 13 and 14 show diagrammatically two embodiments of the invention in which the support element 25 is secured, before closing the housing, to the cover 14. The cover can be made of steel, aluminum, plastic or polymer. The support element can have the form of a rod formed directly in the cover 14 or fixed to it by screwing, gluing, or riveting.

[0114] In the variant of Figure 14, the housing may include a hooking means 29 between the support element 25 and the bottom 11 of the body 13 of the housing. This hooking element may for example be a snap-fastening means or a tight fit between the end of the support element 25 and a cavity formed in the bottom 11 of the housing.

[0115] In the example of Figure 15, the support element is formed by a finger 25 formed in the cover and extending to the body of the housing, for example to the bottom 11 of the body 13. The finger 25 is hollow, the interior volume of the finger communicating with the exterior of the housing. The cover 14 may be made of sheet metal or plastic and the finger formed respectively by deformation of the sheet metal of the cover or by plastic molding. This finger 25 may have a truncated cone shape extending to the bottom 11 of the body 13.

[0116] In the example of Figure 16, the support element 25 is formed in a separate part of the cover 14. This support element 25 is removable. It is introduced into the housing after closing the case. To do this, the cover 14 has a hole 144 through which the support element 25 passes. The support element 25 has a first end 254 retained by the bottom 11 and a second opposite end of the support element 25 comprises a head 252 wider than the hole 144 and located outside the housing 15. The support portion is here located at the interface between the head 252 and the cover 14, outside the housing 15.

[0117] One of the end of the support element and the bottom may comprise a thread, and the other of the end of the support element and the bottom may comprise a thread, the thread cooperating with the thread. Thus, advantageously, the distance between the bottom and the body and the support portion is adjustable, after the closure of the housing. Thus, the deformation of the cover can be adjusted and thus its natural frequency can be modified, even after the closure of the housing.

[0118] This type of connection can also be applied in the previous embodiments to secure the support element to the body or the cover.

[0119] According to certain variants, the support element of figure 16 can be a nail or a dowel fitted into a cavity provided in the bottom 11 of the body 13 of the housing.

[0120] Generally, for each embodiment, as illustrated in Figure 9, each support portion is located so that on at least one straight line passing through the center of inertia 1 of the cover and through a point of the support portion, the point of the support portion is closer to the center of inertia 1 of the cover 14 than to the intersection between this straight line and the nearest edge of the cover. Preferably, in the case of linear or surface contact portions, each support portion is located so that on any straight line D passing through the center of inertia of the cover and through a point of the support portion, the point of the support portion is closer to the center of inertia of the cover than to the intersection between this straight line and the nearest edge of the cover.

[0121] Depending on the embodiment, the cover 14 can therefore be bent or curved in the direction of the bottom 11 or in the direction opposite the bottom 11.

[0122] Naturally, the invention is described in the above by way of example. It is understood that those skilled in the art are able to carry out different variant embodiments of the invention without departing from the scope of the invention.

[0123] It is emphasized that all features, as they emerge for a person skilled in the art from this description, the drawings and the attached claims, even if they have been specifically described only in relation to other specific features, both individually and in any combinations, may be combined with other features or groups of features disclosed herein, provided that this has not been expressly excluded or that technical circumstances make such combinations impossible or meaningless.

Claims

CLAIMS Housing (10) for a power electronic device (1) of an electric powertrain, for example for an inverter, the housing (1) comprising: - a body (13) comprising a base (11) and a set of peripheral walls (12) defining with the base a housing (15) capable of receiving components (20) of the electronic power device, - a cover (14) covering this housing (15) when the housing (10) is closed, characterized in that the housing comprises at least one support element arranged so as to deform the cover when the housing (10) is closed. Housing according to claim 1 in which each support element extends between the body (13) and the cover (14). Housing according to one of the preceding claims in which each support element (25) is dimensioned so that a deformation of the cover (14) is necessary to close the housing. Housing according to one of the preceding claims in which each support element (25) comprises a support portion (250) cooperating with the cover (14) to deform it, each support element (25) being dimensioned so that permanent or uninterrupted contact is ensured between the cover (14) and the support portion(s) of the support element (25), whatever the excitation frequency of the cover (14).Housing according to one of the preceding claims in which each support element (25) is integral with the body (13) before closing the housing and extends to the cover (14) when the housing is closed. Housing according to one of the preceding claims in which each support element (25) is integral with the cover (14) before closing the housing and extends to the body (13) when the housing is closed.

7. Housing according to one of the preceding claims in which each support element (25) extends from the bottom (11) of the body to the cover (14).

8. Housing according to one of claims 1 to 5 in which each support element extends from a wall of the set of peripheral walls (12) of the body (13) to the cover (14) when the housing is closed.

9. Housing according to claim 4 in which each support portion is located so that on at least one straight line passing through the center of inertia of the cover (14) and through a point of the support portion (250), the point of the support portion is closer to the center of inertia of the cover than to the nearest edge of the cover (14).

10. Housing according to one of claims 1 to 7 in which the support element or each support element comprises a pillar (26) one end of which is connected to the bottom of the body (13) and another end of which forms a branch comprising at least two branches (27) the ends of which are in contact with the cover when the housing is closed.

11. Housing according to claim 1 in which each support element (25) is a finger formed in the cover (14) and extending to the body (13) of the housing, for example to the bottom (11) of the body (13).

12. Housing according to one of the preceding claims in which the support element (25) or each support element is stressed in traction between the cover (14) and the body.

13. Housing according to one of claims 4 or 9 in which the distance between the bottom of the body (13) and the support portion (250) is adjustable, before or after closing the housing.

14. Housing according to one of the preceding claims in which one of the end of the support element (25) and the bottom (11) comprises a thread, and the other of the end of the support element (25) and the bottom (11) comprises a thread, the thread cooperating with the thread. Housing according to one of claims 4, 9 or 13 in which the cover has a hole crossed by the support element (25), the support element having one end secured to the bottom (11) and the opposite end of the support element (25) comprising a head wider than the hole, the support portion (250) being located at the interface between the head and the cover (14). Housing according to one of the preceding claims in which the cover (14) comprises a relief (141) cooperating with the support element (25). Power electronic device, for example an inverter, comprising a housing according to one of the preceding claims as well as a card (40) on which the electronic components (20) are arranged, the card comprising at least one opening (41), each opening (41) being crossed by a corresponding support element (25).

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