Waterproof housing

Abstract

Casing comprising a body (1), receiving the contents of the casing, and at least one cover (2) fixed to said body by fixing elements (3) in a sealed manner, and said body comprising at least one side wall defining the circumference of the casing body and at least one rim in the extension of said circumference following a curved transition zone, comprising a first part comprising said curved transition zone, and a second part adjacent to said first part, said first part of the rim and the cover both comprising a first track (21) receiving a seal, and said second part of the rim and the cover both comprising a second track (200) receiving the fixing elements (3), said first tracks on the one hand and the second tracks on the other hand being opposite each other when the cover closes the body of the casing bearing on said rim. Figure to be published with the abstract: Fig. 1B

Description

Title of the invention: Waterproof casing

[0001] The invention relates to a sealed casing, in particular intended to contain electrical and / or electronic components in a liquid-tight manner. More particularly, this casing comprises at least one cover which can be fixed by self-piercing fixing means to the body of the casing. More particularly, this casing is intended to contain, in a sealed manner, a traction battery module, rechargeable or not, of an electric or hybrid motor vehicle, or electronic power elements.

[0002] The term "self-drilling fixing means" means self-drilling and / or self-tapping fixing elements and / or flow-drilling and / or flow-tapping fixing elements, and in particular these fixing elements may comprise or be screws.

[0003] In the remainder of the description, the term “self-drilling” must be understood in the broad sense including self-tapping, flow-drilling, flow-tapping.

[0004] As is known, electric motor vehicles, whether fully electric or hybrid, comprise a traction battery module most often installed under the vehicle body, thus at the risk of being exposed to water in particular. The module, which is very heavy, is thus installed in a casing that is impervious to liquids, in particular water, and very compact to take up as little space as possible. This casing consists of a casing body and at least one cover that closes the casing body. The casing body comprises a vertical turn closed on itself, formed by four vertical walls arranged one after the other, to surround the battery module. The casing body may comprise a bottom wall perpendicular to said vertical turn, so as to form a container having a single open face. A cover attached to the container closes the open face of this container.According to another variant, the casing body can be limited to the vertical lathe, thus defining two open faces opposite and perpendicular to the walls of said lathe, and two covers close these open faces respectively.

[0005] In a known manner, the tub-type casing body of such a casing can be made of extruded aluminum profile or aluminum casting, and the cover can be made of stamped steel sheet and fixed by crimped nuts and screws to the rim of the casing. The casing body has a regular parallelepiped shape, of square or rectangular cross-section and is mechanically strong. However, a disadvantage of such an extruded aluminum casing body is its manufacturing cost.

[0006] A method of manufacturing the housing body from sheet metal which can be considered, because it is economical, is a method by stamping a steel sheet. However, stamped steel casings pose mechanical resistance problems for the operation of fixing a cover to the casing body. It would be advantageous to fix the hood to the casing body with self-drilling fasteners, to avoid pre-drilling operations or to achieve a fixing by flow drilling / flow tapping. However, the forces applied to the coupling zone of the stamped sheet metal of the casing body and the stamped sheet metal of the hood, generate significant stresses and plastic deformations due to the overhang of the fixing zone of the casing body receiving the screws to fix the hood, and to the low thickness of the sheet metal of the casing body.

[0007] To manufacture a casing more economically, it has been proposed to produce a casing body of the tray type from sheet metal.

[0008] Patent application US2019 / 0074496-A1 thus describes a casing, made of sheet metal (steel or aluminum), comprising a tray-type casing, comprising a vertical turn and a bottom, produced by folding or bending a metal sheet. The formation of the tray is carried out so that in the corner areas between two adjacent side walls, one of the walls laterally comprises at least one joining plate which is assembled by overlapping the other adjacent wall and in a sealed joint manner. This makes it possible to reinforce the corners of the tray while using a relatively thin metal sheet. In addition, each side wall may comprise a flap folding towards the outside of the open face of the tray, the flaps being assembled to each other adjacent to form a rim directed towards the outside of the tray. This rim may be drilled to form fixing holes in order to screw a cover thereto, a sealing gasket being interposed.Two adjacent flaps are joined by creating an area with a thickness offset for one so that the latter engages under the other, and forms an outer rim with a substantially flat surface once all the flaps are thus assembled. A cover can be fixed on this flat surface of the rim. A sealing gasket is disposed in a gap between two adjacent flaps placed on top of each other.

[0009] A disadvantage of this casing is its rather complex manufacturing by folding or bending, and which requires welding or gluing points to join the different walls together and also the flaps together. Another disadvantage is that it seems necessary to provide pre-drilling for the fixings. Another disadvantage is a seal, particularly against water, which is unreliable insofar as the seals are poorly protected. These seals thus risk becoming damaged and lacking in effectiveness.

[0010] The invention aims to provide a casing guaranteeing good sealing against liquids, in particular against water. The invention aims to provide a casing which is manufactured economically. In particular, the casing must be mechanically strong to allow the cover to be fixed to the body of the casing by self-drilling fasteners, preferably without pre-drilling.

[0011] To this end, the invention provides a casing comprising a body receiving the contents of the casing, and at least one cover fixed to said body by fixing elements in a sealed manner, and said body comprising: - at least one side wall defining the circumference of the casing body, and - at least one rim in the extension of said turn following a curved transition zone, said rim being directed towards the outside of said turn and extending along the perimeter of said turn. Said rim comprises a first portion comprising said curved transition zone, and a second portion adjacent to the first portion. Said first part of the rim and the cover both comprise a first track receiving a seal, one of said first tracks housing said seal, and said respective first tracks of the rim and the cover being opposite each other when the cover closes the body of the casing resting on said rim. Said second part of the rim and the cover both comprise a second track receiving the fixing elements, and said respective second tracks of the rim and the cover are opposite each other when the cover closes the body of the casing resting on said rim.

[0012] By "at least one side wall" is meant that the body of the casing may comprise a single side wall closed on itself forming an enclosure, or two or three or four side walls, or even more, arranged between them to form an enclosure (therefore closed on itself). Said enclosure forms the circumference of the body of the casing, also called "the circumference of the casing". The circumference of the casing body may have, for example, a substantially rectangular or square cross-section.

[0013] More particularly, said at least one side wall is arranged to form an enclosure defining the circumference of the casing body and delimiting an interior space forming the interior recess of said body receiving the contents of the casing.

[0014] Advantageously, said second part of the rim adjacent to said first part comprises a flat portion extended by an external edge comprising a curvature followed by an external portion extending perpendicular to said flat portion and in a direction opposite to the direction of the curvature, to provide mechanical resistance.

[0015] More particularly, the casing according to the invention is intended to contain electrical and / or electronic components in a sealed manner, the body of the casing receiving the electrical and / or electronic components.

[0016] In particular, said casing body is a single-piece part, and preferably made of stamped sheet metal. In particular, it is produced by stamping a steel or aluminum sheet.

[0017] Advantageously, the casing cover is made of stamped sheet metal. In particular, it is produced by stamping a steel or aluminum sheet.

[0018] The invention has the advantage of proposing a sealing gasket integrated into the casing and well protected between the body of the casing and the cover.

[0019] The invention has the advantage of providing a casing of which at least the casing body is mechanically strong, the curved transition zone of the first part of the rim and the external edge of the second part of the rim, which forms a fallen edge, providing mechanical strength to the rim which will receive the fixing elements.

[0020] The invention also has the advantage of providing a casing of which at least the casing body can be produced economically, preferably by stamping a sheet metal, in particular steel or aluminum, while being mechanically resistant.

[0021] Preferably, said outer edge of the second part of the rim forms the outer end of said rim.

[0022] Preferably, the different tracks extend around the entire periphery of the rim of the housing body and around the entire periphery of the hood.

[0023] In particular, the first track and the second track of the rim of the housing body are substantially parallel to each other, and the first track and the second track of the cover are substantially parallel to each other.

[0024] Advantageously, the first track housing the seal has a hollow shape housing said seal and delimited laterally from the second track receiving fixing elements which is adjacent to it by a shoulder. Preferably, said shoulder has curved ends. The seal is thus well protected from the outside and from the fixing means during their insertion.

[0025] Preferably, said second track of the rim, receiving the self-piercing fixing elements, is raised relative to the first track of the rim, receiving the seal, when said first track of the rim houses said seal. In particular, said cover comprises a flat area on its inner face comprising said first and second tracks of the cover which are coplanar and which come opposite respectively the first track of the rim housing the seal and the second track receiving the screws for fixing the rim of the body of the casing.

[0026] Advantageously, the track housing the sealing gasket has a constant width, consistent with that of the gasket, which allows good integration of the gasket.

[0027] Advantageously, the casing comprises stiffeners extending both around the circumference and the edge of the body of the casing, which makes it possible to reinforce the mechanical resistance of this part of the casing to the forces applied during the insertion of the fixing elements of the cover, in particular by self-drilling.

[0028] Preferably, said stiffeners each have a hollow and semi-truncated shape, the half-base of which encroaches on the rim and the curvature and inclination of which is directed towards the outside of the casing body. This shape provides high mechanical resistance.

[0029] In particular, the first track receiving the sealing gasket and housing said gasket extends over the perimeter of the rim or the cover as the case may be, along a constant width, and comprises undulations which follow the external contours of the stiffeners.

[0030] Advantageously, each fixing element is inserted into said second receiving tracks of said respective fixing elements of the cover and of the body of the casing, and into a zone of said second receiving track of said respective fixing elements of the body of the casing located between two consecutive stiffeners, the zone between two stiffeners having a high mechanical resistance.

[0031] Advantageously, the fixing elements are self-drilling elements inserted into said second receiving tracks of said respective fixing elements of the cover and the body of the casing.

[0032] Preferably, the hood is removably attached.

[0033] The casing body may comprise a single opening of the turn bordered by the rim. The casing body thus has a tray shape. The bottom of the casing body may thus be closed by a bottom wall. This bottom wall may be part of the single-piece part of the casing body, when this is the case, in particular produced during the stamping of the sheet metal forming the casing body.

[0034] The casing body may have an additional opening at its bottom. If the bottom of the casing body is open, it may be closed by another cover. The casing body may be made with a bottom rim, the cover and the rim and the edge of the lathe on which the rim is located may be arranged similarly to that described above.

[0035] The invention also relates to a casing containing electrical and / or electronic components in a sealed manner, the casing being as described above. Preferably, these electrical and / or electronic components comprise a traction battery module of a motor vehicle, and / or power electronic components. In particular, these components are intended for a motor vehicle with traction by electric motor or by a hybrid engine.

[0036] Other features and advantages of the invention will emerge from reading the description given below of several particular embodiments of the invention, given for informational but non-limiting purposes, with reference to the appended drawings in which:

[0037] [Fig. 1A] is a perspective view of a casing body according to one embodiment of the invention.

[0038] [Fig. 1B] is a perspective view of a casing according to one embodiment of the invention comprising the casing body of [Fig. 1A] and a cover fixed to said casing body.

[0039] [Fig. IC] is a partial, detailed schematic view of the housing body and the casing of the preceding figures, in transverse cross-section (in the TV plane) passing through a fixing screw.

[0040] [Fig. 1D] is a partial, detailed schematic view of the casing body and the housing of the preceding figures, in transverse cross-section (in the TV plane) passing through a stiffener of the casing body.

[0041] [Fig.lE] represents a detailed partial view, in cross-section (in the TV plane) passing through a screw, and in perspective, of the casing of the preceding figures

[0042] [Fig.2A] is a perspective view of a housing body of a housing according to another embodiment of the invention.

[0043] [Fig.2B] represents a detailed partial view, in cross-section in the TV plane, and in perspective from above, of the casing body represented in [Fig.2A].

[0044] [Fig.2C] is a partial, detailed schematic view of the casing comprising the casing body of FIGS. 2A and 2B and provided with the casing cover according to the invention, in transverse cross-section (in the TV plane) passing through a screw.

[0045] [Fig.2D] is a partial, detailed schematic view of the casing comprising the casing body of FIGS. 2A to 2C provided with the casing cover according to the invention, in transverse cross-section (in the vertical plane TV) passing through a stiffener of the casing body.

[0046] The orientations expressed in the description of the figures are given with reference to an orthonormal reference frame LVT of the casing body or the casing, in which the axis L represents the longitudinal direction, the axis T the transverse direction, and the axis V represents the vertical direction of the casing body or the casing in the figures. In use, the casing can nevertheless be installed in various positions. The height of the casing corresponds to the vertical direction in the figures.

[0047] In the present description, for the purpose of facilitating the understanding of the drawings, the terms "upper", "lower", refer to the vertical direction V according to the figures.

[0048] [Fig.lA] represents a casing body 1 of the casing which is represented in [Fig.lB] comprising a cover 2 fixed on said casing body 1. The cover 2 is fixed to the housing body 1 by self-drilling screws 3. The housing is intended to contain a traction battery module of a motor vehicle. The battery module (not shown) is installed in the housing body 1.

[0049] The casing body 1 is produced by stamping a steel sheet. This casing body 1 is a single-piece part comprising a side wall closed on itself, in one piece, delimiting an interior space receiving the battery module, and defining the turn 10 of the casing body. Said single-piece part also comprises a rim 11. This turn 10, substantially vertical, is therefore extended by a rim 11 directed towards the outside of the casing body and extending over the entire upper periphery of said turn 10 following a curved transition zone 120. Around the body there is a connection area 100 for the battery module (see [Fig.lA]) made waterproof, particularly to liquids.

[0050] The wall forming the tower 10 is substantially vertical, that is to say very slightly inclined, at an angle relative to the vertical direction V, corresponding to the draft linked to the stamping process ([Fig.lD]). This angle of inclination must be as small as possible relative to the vertical (direction V), in order to maintain the most compact dimensions possible for the body of the battery module casing.

[0051] With reference to [Fig. 1A] and in particular to the cross-sectional figures IC to 1E, said rim 11 comprises a first rim part 111 comprising a first curved part, corresponding to the transition part 120, contiguous to said vertical turn 10 and of curvature facing towards the inside of the casing body and comprising a first flat, horizontal track 12. This first track 12 receives on its upper face a sealing gasket 4 and on which said gasket 4 will rest, which is housed in a first hollow track 21 of the cover 2.

[0052] Said rim 11 comprises a second rim part 112, in continuity with said first part 111 of said rim, and which comprises a second flat track 13, receiving the fixing screws 3 for fixing the cover 2 to the casing body, and an edge 14 with a concave shape, of curvature 140 facing upwards and outwards from the casing body, in external lateral extension of said second flat track 13. This edge 14, also called the fallen edge, comprises an external portion 141, rectilinear, of a direction substantially parallel to that of the lathe, that is to say substantially vertical (axis V) and directed downwards, forming the external end of said rim 11 of the casing body.

[0053] With reference to figures 1A to 1E, in particular to [Fig.1C], the cover 2 comprises two flat zones 201, 200 at the edge and along its entire perimeter, substantially horizontal, which come opposite respectively the first track 12, receiving the sealing gasket 4, and the second track 13, receiving the fixing screws 3, of the rim of the casing body. Said seal 4 is housed on the inner face of the cover 2, in a first hollow track 21 located under one of the flat zones 201. The external flat zone 200 of the cover defines a second track 200 of the cover which receives the fixing screws 3 and which comes opposite and bears on the (upper) surface of the second track 13 of the casing body receiving the screws 3. The first hollow track 21 of the cover 2 is delimited on one side by a shoulder 210 comprising two curved ends 2100, 2101 between the two flat zones 201, 200, following the periphery of the cover, making it possible to form a groove for housing the seal 4. Said hollow track 21 with the seal 4 comes opposite and bears on the first track 12 of the rim 11 of the casing body when the cover 2 closes said casing body 1. The flat zone 201 of the cover is raised due to the shoulder 210 above the sealing gasket 4 relative to the external flat zone 200 which bears on the second track 13 for the fixings 3 of the rim of the casing body when the cover 2 closes said casing body 1.

[0054] With reference in particular to [Fig. 1A] and to figures 1D and 1E, the casing body 1 comprises stiffeners 16 extending from the circumference of the casing body and the rim 11 in order to reinforce the rigidity of the casing body, and more specifically to provide resistance to the forces at the rim 11 during the fixing of the self-drilling screws 3, screwed directly, without pre-drilling, into the rim 11. These stiffeners 16 are produced during the stamping of the steel sheet. They have a hollow shape between the wall of the tower 10 and the rim 11. This hollow shape extends from the wall of the tower towards the rim 11 in a semi-truncated shape whose half-base encroaches on the rim 11, and which has an inclination directed towards the outside of the tower.

[0055] The first track 12 of the casing body 1, receiving the seal 4, as well as the shoulder 210 of the cover and the first hollow track 21 of the cover 2 which houses said seal 4, have a shape comprising undulations corresponding to those of the stiffeners. Said first seal-receiving tracks 12, 21 have a constant width 12.

[0056] Figures 2A to 2D illustrate a casing body 1' and a casing consisting of the casing body 1' and a removable cover 2', according to another embodiment of the invention, a variant of the embodiment which has just been described. Compared to the casing described previously in Figures 1A to 1E, the seal is housed at the level of the casing body 1'.

[0057] The casing body 1' is produced by stamping a steel sheet to form a single-piece part comprising a side wall closed on itself, in one piece, defining an interior space receiving the battery module and defining the substantially vertical turn 10' of the casing body. The single-piece part comprises a rim 11' extending said turn 10'. Said rim 11' is directed towards the outside of the casing body and extends over the entire upper periphery of said turn 10' along a curved transition zone 120', with a curvature facing towards the inside of the casing body. A connection zone 100' of the battery module (see [Fig.lA]), produced in a sealed manner, is located on the wall of the turn of the casing body.

[0058] With reference to [Fig.2A], and in particular to figures 2C and 2D, said rim 11' of the body of the casing comprises a first rim part 111', in continuity with said turn 10', comprising the curved transition zone 120' and a first track 12' flat, horizontal, delimited laterally by a shoulder 121' comprising two curved ends 1210', 1211' so that said first track 12' has a hollow shape, forming a groove, housing, on its upper face, a seal 4', on which the cover 2' will rest. These curved ends comprise a first curvature 1210' facing downwards and towards the outside of the casing body and a second curvature 1211' facing upwards and towards the inside of the casing body so that the shoulder 121', substantially in the shape of an "S", takes a raised direction, of a height in line with the height of the seal 4'.

[0059] Said rim 11' of the casing body comprises a second rim portion 112', in continuity with said first portion 111' of said rim, in the lateral extension of the second curve 1211' of the shoulder 121'. This second rim portion 112' comprises a second track 13', flat, receiving the fixing screws 3', which is adjacent to an edge 14' of curvature 140' facing upwards and outwards of the casing body 1'. This edge 14', also called the fallen edge, comprises an external portion 141', rectilinear', vertical and directed downwards, forming the external end of said rim 11' of the casing body 1'.

[0060] As illustrated by the schematic figures 2C and 2D, the cover 2' comprises two flat zones 201', 200' contiguous along its entire perimeter, horizontally, which come to bear opposite the rim 11' of the casing body 1'. The flat zone 201' of the cover 2' comprises a first track 21' receiving the sealing gasket 4' which comes opposite the first track 12' of the casing body 1' which houses the gasket 4', while the external flat zone 200' forms a track receiving the fixing screws 3' which comes opposite the second track 13' of the casing body 1' receiving the fixing screws 3', when the cover 2' closes the casing body bearing on the rim 11'.

[0061] Furthermore, the casing body 1' comprises stiffeners 16' extending from the turn 10' to the rim 11', in order to reinforce the rigidity of the casing body 1', and more specifically to provide resistance to the forces at the rim 11' when fixing the self-drilling screws 3', screwed directly, without pre-drilling, into the rim. These stiffeners 16' are produced during the stamping of the steel sheet. They have a hollow shape which extends from the wall of the turn 10' towards the rim 11' in a semi-truncated shape whose half-base encroaches on the rim 11' (in the transition zone 120'), and which has an inclination directed towards the outside of the turn 10'.

[0062] The fixing zones of the self-drilling screws 3' of the second track 13' of the edge 11' are located between two consecutive stiffeners, which gives high mechanical resistance to these self-drilling fixing zones. The first track 12' receiving the joint 4' of the edge 11' has undulations which follow the contour of the stiffeners 16' ([Fig.2A] and 2B), that is to say that the track 12' has a part curve where the rounded contour of the hollow shape of a stiffener is located, so that the track 12' receiving the sealing gasket maintains a constant width 12.

[0063] Furthermore, the shoulder 121' forms a separation between the first track 12' housing the seal 4 and the second track 13' receiving the self-drilling fixing screws 3' of the rim 11', so that the second track 13' receiving the screws 3' is separate and slightly raised relative to the track 12' receiving the seal 4'. The seal 4' is thus well held between its respective receiving tracks 12', 21' of the rim of the casing body and the cover, and is protected, in particular against any drilling by the screws 3' during the fixing of the cover.

[0064] By way of example and with reference to [Fig. 1D] and [Fig. 2D], physical quantities of the casing body, for one or other of the embodiments which have just been described, are presented below. These quantities have the same reference signs in the respective figures of the two embodiments. The angular amplitude of the maximum inclination q of a stiffener 16, 16' is defined between the middle of the shape of the stiffener wall and the track 12, 12' receiving the joint 4' arranged horizontally. The maximum depth "p" of said hollow shape is defined by the distance from the most hollow point of the middle of the stiffener wall to the tip of the stiffener joining the plane of the inner surface of the tower wall outside the stiffener and directly above the stiffener.

[0065] The clearance angle g is approximately 1.5 degrees maximum. The flanged edge 14, 14' of the rim has a height "h" of approximately 12 mm. The second track 13, 13' receiving the self-drilling screws 3, 3' has a width 11 of 15 mm in each zone of attachment of the rim 11, 11' between two stiffeners 16, 16'. The first track 12, 12' receiving the sealing gasket 4 has a constant width 12 of 8 mm. The angular amplitude of the maximum inclination q of the stiffeners 16, 16' is 70 degrees. The maximum depth "p" of a stiffener 16, 16' is approximately 9 mm.

[0066] The invention provides a casing comprising a seal which is well maintained between the body of the casing and the cover, and protected, in particular against any drilling by the screws when fixing the cover to the casing body.

[0067] The invention provides a casing body 1, 1' which comprises a rim 11, 11' having a high mechanical strength, supporting the forces applied during the fixing of the cover 2, 2' on the rim 11, 11' of the casing body 1, 1', which can be done by directly inserting fixing elements 3, 3' by self-drilling.

[0068] For example, the body of the casing can withstand forces applied to the coupling zone with the hood which can reach more than 100 kg, while the sheet metal of the casing body can have a thickness of the order of 1.5 mm.

[0069] It is therefore unnecessary to pre-drill the rim 11, 11' of the casing body 1, 1' to insert fixing screws 3, 3' in order to fix the cover 2, 2' there.

[0070] The casing body 1, 1' may comprise a single opening of the turn 10, 10' bordered by the rim 11, 11', or an opening at its bottom 15, 15', opposite to this one.

[0071] The bottom of the casing body can thus be closed by a bottom wall produced during the stamping of the sheet metal, this bottom wall being part of the single-piece part of the casing body. The casing body thus has the shape of a tray.

[0072] Alternatively, the bottom of the casing body can be open, and closed by another cover, the casing body being produced with a bottom rim arranged similarly to that described previously, with a first track receiving a sealing gasket between the casing body and said other cover, and a second fixing track, receiving the self-piercing fixing elements, and a fallen edge.

[0073] An advantage of the invention is an easy and economical embodiment of the casing while having a very mechanically strong casing body, the shapes of the casing body and the cover being derived directly from the stamping dies and punches. The method of manufacturing the sheet metal casing body by stamping a steel sheet is economical.

[0074] There are no additional parts to increase the rigidity of the casing body, therefore no assembly operation to produce the casing body. There is no increase in the thickness of certain areas of the casing body to increase its rigidity. The casing body is capable of withstanding the forces applied to it by self-drilling fixing elements, including when the cover is fixed without prior drilling.

[0075] The casing body according to the invention is very compact, which makes it possible to respect a highly constrained architecture around the battery.

[0076] The casing body and its cover can be formed in a minimum of operations: a stamping operation for each. Then, in use, the casing can be closed by an operation of fixing the cover to the casing body directly with self-drilling fixing elements, at least without pre-drilling the casing body. This saves time for the implementation of the casing.

[0077] In addition, the hood can be made of steel sheet, or even aluminum sheet.

[0078] Although pre-drilling of the hood is not excluded, the invention also allows the hood can accommodate self-drilling screws, without pre-drilling the cover, which saves additional time when installing the casing.

[0079] The invention has been described in the context of a casing for a traction battery module of a motor vehicle. It can also be applied in particular to a casing containing electronic power components, requiring sealed protection.

Claims

1. Claims Casing comprising a body (1, 1'), receiving the contents of the casing, and at least one cover (2, 2') fixed to said body by fixing elements (3, 3') in a sealed manner, and said body (1, 1') comprising at least one side wall defining the circumference (10, 10') of the casing body and at least one rim (11, 11') in the extension of said circumference (10, 10) following a curved transition zone (120, 120'), said rim (11, 11') being directed towards the outside of said circumference (10, 10') and extending along the periphery of said circumference (10, 10'), and said rim (11, 11') comprising a first part (111, 111') comprising said curved transition zone (120, 120'), and a second part (112, 112') adjacent to said first part (111, 111'), and - said first part (111, 111') of the rim (11, 11') and the cover (2, 2') both comprising a first track (12, 12', 21, 21') receiving a seal (4, 4'), one of said first tracks housing said seal (4, 4'), and said respective first tracks of the rim (11, 11') and of the cover (2, 2') being opposite each other when the cover closes the body of the casing bearing on said rim, and - said second part (112, 112') of the rim and the cover (2, 2') both comprising a second track (13, 13', 200, 200') receiving the fixing elements (3), said respective second tracks of the rim and of the cover being in opposite when the hood closes the body of the casing resting on said rim, and said second part (112, 112') of the rim (11, 11') comprising a flat portion extended by an external edge (14, 14') comprising a curvature (140, 140') followed by an external portion (141,141') extending perpendicularly to said flat portion and in a direction opposite to the direction of the curvature (140, 140'), towards a plane defined by the bottom (15) of the body (1, 1'); said casing being characterized in that it comprises stiffeners (16, 16') extending both around (10, 10') and the rim (11, 11') of the casing body (1, 1') and in that each fixing element (3, 3') is inserted into said second tracks (200, 200', 13, 13') receiving said respective fixing elements of the cover (2, 2') and of the rim (11, 11') of the casing body (1, 1'), and in an area of ​​said second, track (13, 13') of the casing body located between two consecutive stiffeners (16, 16').

2. Housing according to claim 1, characterized in that the first track (12, 12') and the second track (13, 13') of the rim (11, 11') are substantially parallel to each other, and in that the first track (21, 21') and the second track (200, 200') of the cover (2, 2') are substantially parallel to each other.

3. Housing according to one of claims 1 to 2, characterized in that the first track (12, 12', 21, 21') housing the seal (4, 4') has a hollow shape housing said seal and delimited laterally from the second track (13, 13', 200, 200') receiving the fixing elements which is adjacent to it by a shoulder (210, 121'), and preferably said shoulder has curved ends (2100, 2101, 1210', 1211').

4. Housing according to one of claims 1 to 3, characterized in that the first track which houses the sealing gasket (4, 4') has a constant width (12).

5. Casing according to claim 1 to 4, characterized in that said stiffeners (16, 16') each have a hollow and semi-truncated shape whose half-base encroaches on the rim (11, 11') and whose curvature and inclination is directed towards the outside of the circumference (10, 10') of the body of the casing.

6. Casing according to one of claims 1 to 5, characterized in that the fixing elements (3, 3') are self-piercing elements inserted into said second tracks (200, 200', 13, 13') receiving said respective fixing elements of the cover and the body of the casing.

7. Casing according to one of claims 1 to 6, characterized in that said casing body is a single piece, and preferably made of stamped sheet metal.

8. Housing according to one of claims 1 to 7, characterized in that it contains electrical and / or electronic components, in particular a traction battery module of a motor vehicle and / or power electronic components.

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