Battery module housing, module equipped with such housing and associated motor vehicle

Abstract

The invention relates to a battery module housing (21) comprising:-a rear portion (22) provided with a bottom wall (22A) delimited by a side wall (23) interrupted at a corner, the side wall comprising a first part (23B) and a second part (23D) facing each other, at least one of the first part and the second part is connected to the bottom wall by a portion (26) having a plurality of folds, the rear portion being integrally formed; and-a front portion (28) comprising a front wall (28A) provided with securing portions (28B, 28C) intended to cooperate with the first and second parts of the side walls of the rear portion so as to delimit with the rear portion a housing (25) for receiving a plurality of battery cells (40). The invention also relates to a battery module and to an associated motor vehicle.

Description

Technical Field

[0001] The present invention relates generally to the field of batteries.

[0002] More particularly, the present invention relates to a battery module housing.

[0003] The invention also relates to a battery module equipped with such a housing.

[0004] The invention finally relates to an associated motor vehicle. Background Art

[0005] Electric motor vehicles (including hybrid vehicles) are generally equipped with electric motors that are supplied with electric current from a plurality of battery modules.

[0006] Each battery module is typically formed by a housing which accommodates a plurality of battery cells.

[0007] Such a battery module is known, for example, from EP 3637495.

[0008] In this document, the housing has a rear part, on which a cover is provided, in this way defining a housing for receiving a battery cell. The rear part has a U-shaped part made in one piece, which has a bottom wall and two side walls. Two side cover plates complete the side walls of the rear part, in this way obtaining a closed structure.

[0009] The cover snaps onto the rear part. The entire housing (including the cover) then forms a rigid structure for receiving the battery cells.

[0010] At the location of the bottom wall of the rear part (typically the base of the U-shape of the U-shaped component) a heat-conducting layer is placed, in this way enabling cooling of the battery cells.

[0011] However, this configuration (with a U-shaped rear portion forming a rigid structure for receiving the battery cells) does not optimally manage the expansion of the cells due to the heat generated by the cells themselves when charging or discharging. Summary of the invention

[0012] In order to make up for the above shortcomings, the present invention proposes to improve the structure of the battery module.

[0013] More particularly, according to the present invention, a battery module housing is provided, the battery module housing comprising:

[0014] a rear portion provided with a bottom wall delimited by side walls interrupted at the corners, the side walls comprising a first part and a second part facing each other, the first part and / or the second part being connected to the bottom wall by a portion comprising a plurality of folds, the rear portion being formed in one piece, and

[0015] A front part comprising a front wall provided with fixing portions intended to cooperate with first and second parts of the side wall of the rear part in such a way as to delimit with the rear part a housing for receiving a plurality of battery cells.

[0016] Therefore, according to the present invention, the presence of a portion including a folded portion in the rear portion of the housing makes it possible to impart flexibility to the housing, which then makes it possible to accommodate the deformation of the cell and limit the influence of the expansion of the wall of the housing while ensuring the rigidity of the battery module.

[0017] Furthermore, such a bellows structure makes it possible to facilitate the installation of the battery cells in the housing of the battery module, since during this installation the panel including the portion having the folded portion can be separated.

[0018] The following are further advantageous, non-limiting features of the battery module housing according to the invention, which may be considered individually or in all technically possible combinations:

[0019] - the first part and the second part of the side wall are each connected to the bottom wall by said portion comprising a plurality of folds;

[0020] - the height of the part (first part or second part) connected to the bottom wall by said part is less than the height of the other parts of the side wall of the rear part;

[0021] - the fixing parts of the front part are welded to the side walls of the rear part; and

[0022] Each fixing portion takes the form of a tongue which projects from the front wall of the front part and is bent in the direction of the side wall of the rear part.

[0023] The present invention also relates to a battery module, comprising:

[0024] - a battery module housing as described above, and

[0025] - a plurality of battery cells, the plurality of battery cells being positioned in the receiving housing,

[0026] The receiving shell receives a closed side plate at a position of a part formed by the first part or the second part of the side wall of the rear portion and connected to the bottom wall through the part, and the closed side plate is positioned between a plurality of battery cells and the part formed by the first part or the second part of the side wall of the rear portion and connected to the bottom wall through the part.

[0027] The following are further advantageous and non-limiting features of the battery module according to the invention, which may be considered individually or in all technically possible combinations:

[0028] - a closing side plate is provided at the location of each of the first and second parts of the side wall of the rear portion, the closing side plate being positioned between the plurality of battery cells and each of the first and second parts of the side wall of the rear portion;

[0029] - a closed side panel comprising an insulating part and a part for receiving a support to be fixed to the motor vehicle;

[0030] - the insulating part is formed by overmolding a polymer onto the fixing part;

[0031] - The fixing parts are made of metal;

[0032] - the fixing means comprise two metal posts each intended to be inserted into an open corner of a side wall of the rear part; and

[0033] - A plurality of battery cells are glued to the bottom wall of the rear section.

[0034] The invention also relates to a motor vehicle comprising:

[0035] a support for receiving the battery module, said receiving support comprising a cooling circuit, and

[0036] - A battery module as described above, wherein a bottom wall of a rear portion of the battery module is positioned in contact with the cooling circuit.

[0037] A thermally conductive paste is placed between the cooling circuit and the bottom wall of the rear part of the battery module.

[0038] The receiving support comprises fixing means of the battery module intended to cooperate with fixing parts of each closing side panel of the battery module.

[0039] Of course, the various features, variants and embodiments of the present invention can be associated with each other in different combinations, as long as they are not incompatible or mutually exclusive. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following description, provided by way of non-limiting examples with reference to the accompanying drawings, clearly explains what the invention consists of and how it can be put into practice.

[0041] In the attached picture:

[0042] [ Figure 1 ] shows a schematic diagram of a motor vehicle equipped with a battery module according to the present invention;

[0043] [ Figure 2 ] indicates Figure 1A schematic perspective view of a battery module in FIG.

[0044] [ Figure 3 ] is included in Figure 2 An exploded perspective view of a battery module housing in a battery module; and

[0045] [ Figure 4 ] is included in Figure 2 Schematic diagram of a closed side plate in a battery module. DETAILED DESCRIPTION

[0046] In this specification, the terms "interior" and "exterior" are used with respect to the housing itself, and are used to refer to the side of the component facing the center of the housing and the side of the component facing the exterior of the housing, respectively.

[0047] exist Figure 1 , a motor vehicle 1 has been shown which is provided with a battery module 20 according to the invention.

[0048] The motor vehicle 1 is an electric or hybrid motor vehicle equipped with an electric motor. At least one battery module 20 (hereinafter also referred to as “module 20 ”) is designed to supply electric current to the electric motor of the motor vehicle 1 .

[0049] The battery module 20 is installed, for example, in a receiving support 10 in a motor vehicle 1. The receiving support 10 is locked to the chassis of the motor vehicle 1, for example.

[0050] Figure 2 A schematic perspective view of a battery module 20 is shown. The module 20 comprises a battery module housing 21 (hereinafter also referred to as “housing 21 ”), a plurality of battery cells 40 and at least one closing side plate 30 .

[0051] like Figure 2 and Figure 3 As shown, the housing 21 has the overall shape of a parallelepiped. The housing comprises a rear portion 22 and a front portion 28.

[0052] In this specification, the terms "front" and "rear" are used relative to the position of an element on a receiving support on which the element in question is mounted. The rear of the element refers to the side facing the receiving support on which the element is mounted, while the front refers to the side facing away from the receiving support.

[0053] like Figure 3As shown, the rear portion 22 comprises a rectangular bottom wall 22A, which is bounded by side walls 23 interrupted at the corners. Here, the side walls 23 are formed by four mutually opposed parts in pairs, namely two mutually facing panels 23A, 23C and two mutually facing panels 23B, 23D. The panels 23A, 23B, 23C, 23D protrude from the bottom wall 22A towards the front.

[0054] Here, the panels 23A, 23C of the side wall 23 form the two longer sides of the side wall 23. They form a straight portion of the side wall 23 and have a uniform and predetermined height H1.

[0055] According to the invention, at least one of the panels 23B, 23D of the side wall 23 is advantageously connected to the bottom wall 22A by a portion 26 comprising a plurality of folds.

[0056] Here, if Figure 3 As shown, more particularly, the panels 23B, 23D of the side wall 23 are each connected to the bottom wall 22A by a portion 26 including a plurality of folds.

[0057] In this specification, a "folded portion" refers to a part that is either folded on itself in a sharp manner to form an edge, or folded on itself to form a corrugation with a small radius of curvature (less than one centimeter). Such a folded portion thus forms a double thickness.

[0058] Here, the portion 26 is formed at the base of each of the panels 23B, 23D of the side wall 23. The portion 26 comprises a plurality of continuous folds arranged with fold lines parallel to one another. Furthermore, these fold lines are, for example, parallel to the free edges of the panels 23B, 23D in question.

[0059] By way of illustration, each portion 26 here takes the form of a bellows extending between the bottom wall 22A and the panel 23B, 23D in question.

[0060] According to the invention, the presence of these portions including folds advantageously makes it possible to introduce some flexibility in the rear portion 22 of the housing 21, in particular in the event of expansion of the cells 40. This flexibility makes it possible in particular to move the two panels 23B, 23D away from each other during the first charging of the battery cells 40.

[0061] like Figure 3 As represented, at least one of the panels 23B, 23D has a height that is smaller than the height of the panels 23A, 23C forming the longer sides of the side wall 23 .

[0062] Here, more specifically, the panel 23B has a uniform and predetermined height H2 that is smaller than the height H1 of the panels 23A, 23C. The panel 23D has a uniform and predetermined height H3 that is smaller than the height H2 of the opposing panel 23B.

[0063] These height differences of the panels 23B, 23D are particularly advantageous for positioning the closing side panel 30, as described below.

[0064] The rear part 22 is advantageously made in one piece. This makes it possible in particular to obtain a partially flexible rear part of a rigid shell, which does not have weak points such as those resulting from assembling a plurality of components. Furthermore, this makes it possible to facilitate its production.

[0065] The rear part 22 is for example made of an alloy comprising aluminium, preferably greater than 50% by weight of aluminium. Alternatively, the rear part may be made entirely of aluminium.

[0066] like Figure 2 and Figure 3 As shown, the front part 28 is designed to close the rear part 22 at the front. The front part 28 includes a front wall 28A provided with fixing parts 28B, 28C. The fixing parts 28B, 28C of the front part 28 extend in the direction of the side wall 23. In other words, the fixing parts 28B, 28C extend from the front wall 28A toward the rear of the housing 21.

[0067] The fixing portions 28B, 28C are intended to cooperate with the panels 23B, 23C of the side walls 23 of the rear part 22, in such a way as to define a housing 25 for receiving a plurality of battery cells 40. The fixing portions 28B, 28C make it possible to close the housing (in such a way as to retain the cells 40 in the receiving housing 25 defined by the front part 28 and the rear part 22).

[0068] Here, the fixing parts 28B, 28C are welded to the side wall 23 of the rear part 22. More specifically, welding is used between the fixing parts 28C and the panel 23D on the one hand, and between the fixing parts 28B and the panel 23B on the other hand. Welding is also used between the panels 23A, 23C and the edges of the front part 28 that do not include the fixing parts 28B, 28C, so as to strengthen the fixing of the front part 28 and the rear part 22. Alternatively, the fixing parts can be fixed to the side wall of the rear part by any other mechanical fixing means.

[0069] In practice, each fixing portion 28B, 28C takes the form of a tongue protruding from the front wall 28. More specifically, each tongue has a shape bent in the direction of the side wall 23 of the rear portion 22. In other words, each fixing portion 28B, 28C takes the form of a tongue bent toward the rear of the housing 21.

[0070] like Figure 3 As shown, there are two different fixing portions 28C of the panel 23D facing the side wall 23 of the rear portion 22. Each of these fixing portions 28C comprises a base portion 29A and a bent portion 29B, in such a way as to form the tongue of the fixing portion 28C described above.

[0071] The base portion 29A extends from and is flush with the front wall 28A. The bent portion 29B extends from the base portion 29A substantially orthogonal to the base portion 29A. Thus, the bent portion 29B extends toward the rear of the housing 21. The bent portion 29B is to be fixed to the panel 23D of the side wall 23 of the rear portion 22.

[0072] In contrast, Figure 2 As shown, there is a single fixing portion 28B. This fixing portion 28B also comprises a base portion 29C and a bent portion 29D, in such a way that the tongue of the fixing portion 28B described above is formed.

[0073] The base portion 29C extends from and is flush with the front wall 28A. The curved portion 29D extends from the base portion 29C substantially orthogonally to the base portion 29C. Thus, the curved portion 29D extends toward the rear of the housing 21. The curved portion 29D is intended to be fixed to the panel 23B of the side wall 23 of the rear portion 22.

[0074] Here, the length of the fixing portion 28B is approximately comparable to the length of the panel 23B. Alternatively, the length of the fixing portion is less than the length of the associated panel.

[0075] The front portion 28 is, for example, made in one piece from aluminum or an aluminum alloy.

[0076] A plurality of battery cells 40 are positioned in a receiving housing 25 formed by an assembly comprising the rear part 22 and the front part 28. The battery cells 40 are positioned, for example, alongside one another between the panels 23A, 23C. Here, for example, there are sixteen battery cells.

[0077] In practice, each battery cell 40 is for example glued to the bottom wall 22A of the rear part 22 of the casing 21 .

[0078] Here, the cells 40 are flexible encapsulated cells, that is to say, the encapsulation of these cells 40 is capable of deforming during their insertion into the receiving housing 25 formed by the front part 28 and the rear part 22 and when they are charged or discharged. The rear part 22 of the battery module housing 21 advantageously makes it possible to accommodate the deformation of the cells by means of the part 26 including the fold. In fact, the part 26 makes it possible for the housing 21 of the module 20 to be flexible while ensuring the overall rigidity of the housing 21.

[0079] More specifically, the flexible encapsulated battery cell 40 includes a flexible outer encapsulation containing an electrolyte therein, the electrolyte including an organic solution or a solution based on a lithium salt and a carbonate.

[0080] For example, it is a lithium-ion type electrolyte enclosed in an envelope consisting of a plastic film surrounded by a laminated aluminum film. The plastic film is intended to insulate the electrolyte contained in the cell 35 from the aluminum film.

[0081] These flexible encapsulated cells 40 , which are well known to those skilled in the art, will not be described in detail here.

[0082] In order to be able to close the module 20 (i.e., by blocking the space between the plurality of battery cells 40 and the panels 23B, 23D of the rear portion 22 of the housing 21), the battery module 20 comprises at least one closing side panel 30. When there is a single panel 23B, 23D connected to the bottom wall 22A of the rear portion 22 by the portion 26, a single closing side panel 30 is also provided in the module 20.

[0083] In practice, the closing side plate 30 is here positioned at the location of each of the panels 23B, 23D (because each of the two panels 23B, 23D is connected to the bottom wall 22A of the rear portion 22 via the portion 26). In other words, although this cannot be seen in the drawings, the battery module 20 therefore includes two closing side plates 30 (one closing side plate at the location of each of the panels 23B, 23D).

[0084] Figure 4 An example of a closed side panel 30 is shown in FIG.

[0085] As can be seen in this figure, each closing side panel 30 comprises an insulating part 32 and a part 35 for fixing it to a receiving support 10 of the motor vehicle 1 .

[0086] Here, the fixing member 35 is made of metal. For example, the fixing member is made of aluminum.

[0087] More particularly, there are two distinct fixing means 35 . Here, these take the form of metal posts pierced by longitudinal holes and designed to cooperate with complementary fixing means of the receiving support 10 .

[0088] In order to enable these fixing parts 35 to cooperate with the fixing means of the receiving support 10, the fixing parts 35 are positioned facing the open corners of the side walls 23 of the rear portion 22. In this way, when the module 20 is mounted on the receiving support 10, the cooperation between the fixing parts 35 of each closed side panel 30 installed in the rear portion 22 of the module 20 and the corresponding fixing means of the receiving support 10 is not hindered by the bottom wall 22A of the rear portion 22 of the module 20.

[0089] In order to enable the module 20 to be fixed to the receiving support 10, the bottom of the receiving support 10 comprises fixing means (not represented). These fixing means are designed to cooperate with the fixing parts 35 of each closing side panel 30 of the module 20. In other words, here, the fixing means of the receiving support 10 are designed to cooperate with the longitudinal holes in the metal pillars of the closing side panels 30.

[0090] These fixing means of the receiving support 10 are, for example, lugs protruding from the bottom of the receiving support 10 , which lugs each cooperate with a corresponding longitudinal hole of a metal stud 35 at the corner of each closing side panel 30 .

[0091] Here, the insulating part 32 is formed by overmolding a polymer onto the fixing part 35. In other words, the insulating part 32 is formed by overmolding a plastic material onto the fixing part 35. In practice, each metal post comprises a plurality of attachment points to which the polymer forming the insulating part 32 is attached during overmolding. Such a material for the insulating part makes it possible to electrically insulate the elements of the housing 21 of the battery module.

[0092] As in Figure 4 As can be seen in the figure, the insulating part 32 comprises, on its front face 30A, mounting portions 37 which enable the closing side panel 30 to be mounted in the housing 21. Here, these mounting portions 37 are, for example, lugs 37 protruding from the front face of the closing side panel 30, which are intended to abut against the panels 23B, 23D in question (i.e. the panels 23B, 23D against which the closing side panel 30 is mounted).

[0093] Alternatively, the front face of the closed side panel may not include such mounting portions. In another alternative, only one of the closed side panels may include these mounting portions.

[0094] These mounting portions 37 are also suitable for enabling integration of connection plates (not shown) to which the (anode or cathode) tongues of the battery cells 40 are connected (eg welded). These connection plates are then, for example, bolted at the location of the mounting portions 37.

[0095] In order to ensure the rigidity of the battery module 20, each closed side panel 30 is fixed to the inside of the rear portion 22 of the module 20. More specifically, each closed side panel 30 is positioned to bear against the bottom wall 22A of the rear portion 22 at the position of the portion 26 including the folded portion. Here, each closed side panel 30 is welded to the panels 23A, 23B, 23C, 23D, for example.

[0096] Each closing side plate 30 is, for example, welded to the rear portion 22 of the housing 21 of the battery module 20 .

[0097] At least one of the closing side plates 30 comprises a connection element (not represented) which is connected to the electrical connection terminals of the battery cells 40. The connection element then enables the exchange of electrical signals between the interior of the battery module 20 and the exterior of this module 20.

[0098] The height H3 of the panel 23D, which is less than the height of the other panels 23A, 23B, 23C of the side wall 23 of the rear part 22 of the housing 21, is particularly advantageous for positioning such a connection element (and for exchanging electrical signals with the outside of the module 20). In fact, the space between the free edge of the panel 23D of the side wall 23 of the rear part 22, the free edge of the front wall 28A of the front part 28 and the free edge of the fixing portion 28C makes it possible to receive this connection element and also to access it from the outside of the battery module 20.

[0099] The structure of the closing side plate 30 is particularly advantageous. In fact, since it consists of two materials, it combines a component having an electrical insulating function with a more rigid component capable of fixing the battery module on a receiving support in a motor vehicle. It thus makes it possible to close the module 20 while enabling it to be fixed on the receiving support 10.

[0100] Finally, once all components are assembled, the rear portion 22 of the housing 21 also forms the rear portion of the battery module 20 , and the front portion 28 of the housing 21 also forms the front portion of the module 20 .

[0101] The battery module 20 is positioned in the receiving support 10 in order to be able to supply electric current to the electric motor of the motor vehicle 1 .

[0102] The receiving support 10 comprises a cooling circuit (not shown) at the bottom. The cooling effect is obtained, for example, by circulating water in the cooling circuit.

[0103] The cooling circuit is designed to cool the battery cells 40 by conduction. To this end, the bottom wall 22A of the rear part 22 of the housing 21 of the battery module 20 is in contact with the bottom of the receiving support 10 .

[0104] In order to improve the conduction phenomenon (and therefore improve cooling), a thermally conductive paste (not shown) is placed between the bottom of the receiving support 10 and the bottom wall 22A of the rear part 22 of the housing 21 of the battery module 20. In other words, the thermally conductive paste is placed between the cooling circuit and the bottom wall 22A of the rear part 22 of the housing 21 of the battery module 20, in this way improving the efficiency of heat conduction between the cooling circuit and the battery cells 40 (fixed to the bottom wall 22A of the rear part 22 of the housing 21 of the battery module 20).

[0105] Such a thermally conductive paste makes it possible to prevent the formation of air layers between the cooling circuit and the battery cells 40 , which makes it possible to improve the conduction phenomena and therefore the cooling.

[0106] The receiving support 10 is here formed, for example, in a sealed manner to prevent water drops or dust from penetrating into the battery module. The sealing is here assessed according to the IP67 rating of the EN60529 standard.

[0107] In a variant embodiment, the bent tongues forming part of the panel for fixing the front part to the side wall of the rear part can be different in number and shape, as long as these bent tongues can cooperate with the panel of the side wall of the rear part to close the shell (and therefore the battery module) and retain the battery cells in the receiving shell defined thereby.

[0108] In general, it should be noted that the dimensions of the front and rear parts of the housing of the battery module and the dimensions of the receiving supports are adapted according to the number of battery cells in the module. In the above example, the dimensions are adjusted so that the battery module contains sixteen cells.

[0109] The above-described embodiments relate only to one receiving support associated with one battery module.

[0110] Of course, the invention is applicable to the case where a plurality of battery modules are included in the motor vehicle. In this case, it is conceivable that a plurality of battery modules are juxtaposed side by side with each other in the motor vehicle, each of the plurality of battery modules being mounted on a corresponding receiving support. It is also conceivable that a single receiving support is provided, which receives a plurality of battery modules (the battery modules are positioned, for example, side by side with each other on the bottom of the single receiving support).

[0111] Finally, due to the presence of a bellows structure in the rear portion of the housing of the battery module, it is possible to benefit from some flexibility of the walls of the housing, making it possible to accommodate deformation of the cells and limit the effects of expansion of the walls of the housing, while maintaining the rigidity of the battery module.

[0112] Furthermore, such a bellows structure makes it possible to facilitate installation of the battery cells in the housing of the battery module because the panel including the portion having the folded portion can be separated when the battery cells are installed.

[0113] Finally, producing the closing side panel from two materials makes it possible to combine in one component the electrical insulation function and the reinforcement function, making it possible to consolidate the rigidity of the battery module and to fix it to a receiving support in a motor vehicle.

[0114] Furthermore, the use of closing side panels makes it possible to control, in particular fill, the space between the battery cells and the wall of the housing of the module. This makes it possible in particular to optimize the size (in particular the length) of the cells installed in the housing of the battery module.

Claims

1. A battery module housing (21), comprising: - a rear portion (22) provided with a bottom wall (22A) delimited by a side wall (23) interrupted at a corner, the side wall (23) comprising a first part (23B) and a second part (23D) facing each other, the first part (23B) and / or the second part (23D) being connected to the bottom wall (22A) by a portion (26) comprising a plurality of folds, the rear portion (22) being formed in one piece, and - a front part (28) comprising a front wall (28A) provided with fixing portions (28B, 28C) intended to cooperate with a first part (23B) and a second part (23D) of a side wall (23) of the rear part (22) in such a way as to define with the rear part (22) a housing (25) for receiving a plurality of battery cells (40).

2. The battery module housing (21) according to claim 1, wherein: The height of the parts (23B, 23D) connected to the bottom wall (22A) through the portion (26) is smaller than the height of the other parts (23A, 23C) of the side wall (23) of the rear portion (22).

3. The battery module housing (21) according to claim 1 or 2, wherein: The fixing portions (28B, 28C) of the front portion are welded to the side walls (23) of the rear portion (22).

4. The battery module housing (21) according to any one of claims 1 to 3, wherein: Each fixing portion (28B, 28C) takes the form of a tongue which projects from a front wall (28A) of the front portion (28) and is bent in the direction of a side wall (23) of the rear portion (22).

5. A battery module (20), comprising: - A battery module housing (21) according to any one of claims 1 to 4, and - A plurality of battery cells (40) positioned in the receiving shell (25), the receiving shell (25) receiving a closed side plate (30) at the position of a part (23B, 23D) connected to the bottom wall (22A) via the part (26), the closed side plate being positioned between the plurality of battery cells (40) and the part (23B, 23D) formed by the first part (23B) or the second part (23D) of the side wall (23) of the rear part (22) and connected to the bottom wall (22A) via the part (26).

6. The battery module (20) according to claim 5, wherein: The closed side panel (30) comprises an insulating part (32) and a part (35) for receiving a support (10) to be fixed to a motor vehicle (10).

7. The battery module (20) according to claim 6, wherein: The insulating component (32) is formed by overmolding a polymer onto the fixing component (35).

8. The battery module (20) according to claim 6 or 7, wherein: The fixing component (35) is made of metal.

9. The battery module (20) according to any one of claims 6 to 8, wherein: The fixing means (35) comprise two metal posts, each of which is intended to be inserted into an open corner of a side wall (23) of the rear portion (22).

10. A motor vehicle (1) comprising: a support (10) for receiving a battery module (20), said receiving support (10) comprising a cooling circuit, and - The battery module (20) according to any one of claims 5 to 9, the bottom wall (22A) of the rear part (22) of the battery module (20) being positioned in contact with the cooling circuit.

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