Bonding and fastening assembly for battery holder and battery holder for transport vehicle

Abstract

The invention relates to an assembly (1) for a battery holder, comprising: a first structural element (10); a second profile (30) exhibiting a hollow cross-section internally delimiting an adhesive surface (s30), and a mating cavity (31); an engagement means (50) inserted into the mating cavity (31) and comprising at least one fixing hole (51), the engagement means (50) comprising an engagement surface (s50) facing the adhesive surface (s30) on the outside; an adhesive (20) interposed between the bonding surface (s50) and the adhesive surface (s30), the adhesive (20) being configured to allow adhesion between the bonding surface (s50) and the adhesive surface (s30); the fixing component (40) comprises a fixing rod (41) which is screwed into the fixing hole (51); the fixing member (40) and the engagement mechanism (50) are thereby configured to fix the first structural element (10) with the second profile (30).

Description

Technical Field

[0001] The present invention relates to the field of electric or hybrid transportation vehicles and more particularly to a battery holder intended to receive all or a portion of a battery supported by the battery holder.

[0002] More particularly, the present invention relates to an assembly for such a battery holder. Background Art

[0003] The prior art described below proposes an application in the field of electric or hybrid vehicles, but it may also be relevant to other fields or applications requiring the use of a battery holder.

[0004] It is known from the prior art to use battery housings that present a structural frame designed to support the batteries and ultimately protect the battery cells or battery modules from damage in the event of a side impact or an impact from the environment. Such battery housings generally comprise the following elements:

[0005] a circumferential structural frame, which is typically fastened to the vehicle body structure using a bolt system;

[0006] - a bottom plate closing the bottom of the frame and configured to receive all or a portion of a battery cell or battery module;

[0007] - A cover made of plastic, steel or aluminum and placed on top of the above structure to completely seal the battery housing.

[0008] The purpose of the housing is to house and protect the battery cells or modules. However, the overall structural shape of the frame can vary significantly depending on the needs and the type of battery cells or modules that the battery holder is intended to accommodate. In reality, the battery system of an electric vehicle is constructed from a combination of individual cells. Generally speaking, there are three main cell types that determine the geometry, size, range, and vulnerability of the energy storage system. Therefore, the selected cell type will influence the final design and shape of the battery housing.

[0009] The first major characteristic a battery enclosure should possess is that it needs to be strong and durable enough to reduce the likelihood of deformation when the vehicle is involved in improper use or an accident. For this reason, the battery enclosure must be strong enough to reduce the possibility of damage to the interior of the enclosure, which could ultimately cause serious damage to the vehicle and its surroundings.

[0010] The second basic characteristic that the battery housing must have is that it must comply with mandatory standards, such as leak tightness. That is, water or any other debris must not be able to penetrate the battery housing. A key parameter that allows this requirement to be met is to ensure that the battery housing exhibits good flatness, in particular, the lid or bottom base plate on the top of the above-mentioned structure of the battery housing is sealed to the bottom of the above-mentioned structure. However, when assembling the frame parts that constitute the frame, welding is required to fix the frame parts to each other. Welding will cause deformation of the frame structure and cause irregularities in the flatness of the frame. In order to overcome this deformation, machining operations may be required, which may add a lot of cost and extra weight.

[0011] Finally, an important technical feature that the battery housing should have is light weight to reduce the overall energy consumption of the vehicle and its cost.

[0012] To reduce frame weight, hollow profiles are commonly used. To minimize manufacturing costs, hollow profiles are typically extruded. Castings can also be considered when complex frame shapes are required. In other cases, a combination of castings and hollow extrusions may be considered.

[0013] The prior art already knows how to use specialized mechanisms to form a joint between two adjacent profiles. Document US20180186227A1 discloses a first type of joint that is bolted to a first structural element on the one hand and to a second profile on the other. Documents DE102017117093A1 and DE102016121252B4 disclose another solution in which the joint is welded to the profile. However, using these techniques, it is not immediately clear whether they can simultaneously exhibit good mechanical resistance and good leak tightness.

[0014] Furthermore, the use of welding to fix the profiles may increase the deformations between the profiles, which may create geometric defects in the battery holder. Alternative joining methods are known from the prior art by fastening a first profile to a second profile. However, these techniques require the provision of additional features in the profile design to accommodate the threaded holes. Such features would be present along the entire length of the profile, but only one or two would be needed for the ends. This approach leads to unfavorable consequences in terms of weight and cost. Technical solutions of this type are well known in aluminum constructions in buildings (e.g. doors, windows), but there is no guarantee that they will exhibit sufficient strength.

[0015] It is also known from document EP1566327A2 to insert a threaded insert along its entire length into the hollow cavity of a first profile, which is housed in the cavity by gluing or welding and enables the second profile to be fixed by screwing. This solution requires contact between the two profiles during fixing, which can generate stresses in the adhesive used or in the weld seams that can lead to weak components. Summary of the Invention

[0016] The present invention aims to solve the above problems. To this end, the present invention relates to an assembly for a battery holder, comprising:

[0017] a first structural element extending in a first direction and comprising a first bearing surface;

[0018] a second profile extending in a second direction different from the first direction, the second profile presenting a hollow section internally delimiting a bonding surface, and a fitting cavity;

[0019] - an engagement mechanism, which is inserted into the fitting cavity of the second profile and comprises at least one fixing hole, the engagement mechanism externally comprising an engagement surface facing the bonding surface;

[0020] - an adhesive interposed between the engaging surface of the engaging mechanism and the bonding surface of the second profile, the adhesive being configured to allow bonding between the engaging surface and the bonding surface;

[0021] a fixing member comprising: a fixing rod screwed into a fixing hole of the coupling mechanism; and a bearing head attached to the fixing rod and resting on a first bearing surface of the first structural element to fix the first structural element to the coupling mechanism by clamping;

[0022] The fixing member and the engagement mechanism are thereby configured to fix the first structural element to the second profile.

[0023] The arrangement described above makes it possible to provide an assembly for a battery holder in which an interposed joining mechanism allows, on the one hand, the fixing of a first structural element by screw joining and, on the other hand, the fixing of a second structural element by bonding. Advantageously, adhesive bonding between different structural elements (such as the profiles of the battery holder) allows the connection of two or more structural elements without the need for welding techniques while ensuring good structural performance. Furthermore, adhesive bonding can be more easily performed on a large scale and limits deformations between the first structural element and the second profile, which is a cost-effective solution for manufacturing battery holders.

[0024] According to one embodiment, the assembly includes one or more of the following features, taken alone or in combination.

[0025] According to one embodiment, the fixing hole is a threaded hole, and the fixing member is a screw or a bolt adapted to be screwed into the threaded hole.

[0026] According to one embodiment, the first structural element is a profile, such as an extruded profile.

[0027] A "profile" is a structural element extending in a certain direction, which can be manufactured by molding, stamping, roll forming, extrusion or any other manufacturing method. If the profile comprises a polymer material, the profile can be manufactured by injection molding.

[0028] According to one embodiment, the first direction is clearly perpendicular to the second direction. However, the first direction may form an angle with the second direction strictly comprised between 0° and 360° and different from 180°, and in particular strictly comprised between 20° and 340°.

[0029] According to one embodiment, the second profile is an extruded profile.

[0030] According to one embodiment, the first structural element comprises a first cooperating surface, which is opposite the first load-bearing surface compared to the first structural element, and the engagement mechanism comprises externally a contact surface extending transversely to the engagement surface, the contact surface of the engagement mechanism being configured to rest on the first cooperating surface of the first structural element when the first structural element is fixed to the engagement mechanism by the fixing member.

[0031] According to one embodiment, an adhesive may be applied between the load-bearing surface of the first structural element and the engagement means in order to increase the stiffness and / or strength of the assembly.

[0032] According to one embodiment, the engagement mechanism includes a contact end portion that protrudes out of the mating cavity, thereby defining a gap between the first structural element and the second profile when the first structural element and the second profile are fixed to each other by the fixing member and the engagement mechanism. This means that the first structural element and the second profile are not in direct contact, which is advantageous when using screws or bolts to join because it avoids stress on the adhesive.

[0033] According to one embodiment, the contact end comprises a contact surface.

[0034] According to one embodiment, the assembly further comprises a component arranged in the gap between the first structural element and the second profile, the component being configured to prevent liquid or dust from entering between the first structural element and the second profile at the level of the joining mechanism.

[0035] According to one embodiment, the component is an adhesive, a sealant or a joint compound.

[0036] According to one embodiment, the engagement surface of the engagement mechanism comprises a blocking roughness structure configured to block translation of the engagement mechanism along the second direction within the mating cavity.

[0037] Advantageously, the barrier roughness allows increasing the bonding area between the bonding surface and the adhesive. Thus, the bonding between the second profile and the joining means is improved.

[0038] According to one embodiment, the joining mechanism includes an expandable element having the joining surface, and an internal element, which is configured to be inserted into the expandable element and, when the internal element is inserted into the expandable element, causes expansion of the expandable element, thereby pushing the joining surface toward the bonding surface.

[0039] According to one embodiment, the inner element is a one-piece solid element.

[0040] According to one embodiment, the inner element presents a cross section measured perpendicular to the second direction which gradually increases, thereby forming a slope on the outside, which slope is configured to cause expansion of the expandable element when the inner element is inserted into the expandable element.

[0041] According to one embodiment, the expandable element comprises at least one expansion agent, the at least one expansion agent comprising a main body and at least two lateral protrusions, the main body comprising a portion of the fixing hole, the at least two lateral protrusions comprising the engagement surface, each lateral protrusion being fixedly attached to the main body and expandable toward the bonding surface.

[0042] According to one embodiment, the expansion agent comprises a generally U-shape, wherein each lateral protrusion comprises a proximal end fixedly attached to the body, and a free distal end opposite the proximal end.

[0043] According to one embodiment, wherein the expandable element comprises a first expansion agent and a second expansion agent, the lateral projection of the first expansion agent is angularly offset from the lateral projection of the second expansion agent about the second direction.

[0044] According to one embodiment, the angular offset between the lateral protrusion of the first expansion agent and the lateral protrusion of the second expansion agent is clearly equal to 90°.

[0045] According to one embodiment, the joining means is a one-piece solid element or a hollow profile.

[0046] According to one embodiment, the engagement mechanism comprises a polymer.

[0047] According to one embodiment, the engagement means consists of a polymer engagement means. In other words, the engagement means is made solely of polymer material.

[0048] According to one embodiment, the engagement mechanism comprises a metallic material, such as aluminum.

[0049] According to one embodiment, the joining mechanism is constituted by a metal joining mechanism (eg an aluminum joining mechanism). In other words, the joining mechanism is made only of a metal material (eg aluminum).

[0050] The objects of the invention are also achieved by implementing a battery holder for a transport vehicle comprising a frame and a base plate defining between them a housing intended to receive all or part of a battery, the frame comprising at least one component as previously described.

[0051] The objects of the present invention are also achieved by implementing an electric or hybrid transport vehicle comprising a battery holder as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The foregoing and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of embodiments, which are given by way of illustration and not limitation with reference to the accompanying drawings in which like reference numerals designate similar elements or elements having similar functions, and in which:

[0054] Figure 1 A cross-sectional view schematically illustrates an assembly according to one embodiment of the present invention.

[0055] Figure 2 A perspective view schematically illustrates a second profile and two engagement mechanisms of an assembly according to one embodiment of the invention.

[0056] Figure 3 A perspective view schematically illustrates an engagement mechanism including an inner member and an expandable member according to one embodiment of the present invention.

[0057] Figure 4 Schematically Figure 3 A cross-sectional view of the joining mechanism.

[0058] Figure 5 A perspective view schematically illustrates an engagement mechanism including an inner member and an expandable member according to another embodiment of the present invention.

[0059] Figure 6 Schematically Figure 5 A cross-sectional view of the joining mechanism. DETAILED DESCRIPTION

[0060] In the drawings and in the rest of the description, the same reference numerals represent the same or similar elements. In addition, the various elements are not represented to scale to facilitate the clarity of the drawings. In addition, different embodiments and modifications are not mutually exclusive and can be combined with each other.

[0061] like Figure 1 As illustrated in FIG, the present invention relates to an assembly 1 for a battery holder and also to a battery holder included in a transport vehicle. The transport vehicle may be, for example, an electric or hybrid transport vehicle. The battery holder comprises a frame and a base plate defining between them a housing intended to receive all or part of a battery, the frame comprising at least one assembly 1 of the type described below.

[0062] Component 1 includes a first structural element 10 extending along a first direction, designated "X," and comprising a first load-bearing surface s10. First structural element 10 may include a first cooperating surface s12, which is opposite first load-bearing surface s10 relative to first structural element 10. For example, first structural element 10 is a profile, more specifically an extruded profile. "Profile" refers to a structural element extending along a certain direction that can be manufactured by molding, stamping, roll-forming, extrusion, or any other manufacturing method. If the profile comprises a polymer material, it can be manufactured by injection molding.

[0063] The assembly further comprises a second profile 30 extending in a second direction referenced “Y” different from the first direction X. Figure 1 As shown, the first direction X can be clearly perpendicular to the second direction Y. However, the first direction X can form any angle with the second direction Y, strictly included between 0° and 360°. Similar to the first structural element 10, the second profile 30 can be an extruded profile. Extrusion is a cost-effective solution for manufacturing profiles. The second profile 30 has a hollow cross-section that internally defines a bonding surface s30 and a mating cavity 31. The bonding surface s30 covers all or part of the surface of the second profile 30. The bonding surface s30 can also cover one or more internal surfaces of the second profile 30.

[0064] The engaging mechanism 50 is inserted into the engaging cavity 31 of the second profile 30. Figure 1 As shown in FIG. 2 , the coupling mechanism 50 may be a one-piece solid component or a hollow profile.

[0065] For example, the bonding mechanism 50 may include a polymer or be composed of a polymer bonding mechanism 50. In other words, the bonding mechanism 50 can therefore only be made of polymer materials. Alternatively, the bonding mechanism can include a metal material, such as aluminum, or can be composed of a metal bonding mechanism (e.g., an aluminum bonding mechanism). In other words, the bonding mechanism can therefore only be made of a metal material (e.g., aluminum).

[0066] The coupling mechanism 50 includes at least one fixing hole 51. Figure 2 In the first variant represented, the second profile 30 comprises two fitting cavities into which two engagement members 50 are inserted, each of which comprises a fixing hole 51. Figures 3 to 6 In another embodiment, the coupling mechanism 50 comprises two fixing holes 51 .

[0067] The joining mechanism 50 externally comprises a joining surface s50 that faces the adhesive surface s30 of the second profile 30. Typically, the joining mechanism 50 externally comprises a contact surface s52 that extends transversely to the joining surface s50. This contact surface s52 of the joining mechanism 50 is then configured to rest against the first cooperating surface s12 of the first structural element 10, particularly when the first structural element 10 is secured to the joining mechanism 50 via the securing member 40. In that case, an adhesive can be applied between the first bearing surface s12 of the first structural element 10 and the joining mechanism 50 in order to increase the rigidity and / or strength of the assembly 1.

[0068] Advantageously, if Figure 1 As illustrated, the joining mechanism 50 may include a contact end 53 that protrudes beyond the mating cavity 31 to define a gap (labeled "g") between the first structural element 10 and the second profile 30 when the first structural element 10 and the second profile 30 are secured to each other via the joining mechanism 50. The first structural element 10 and the second profile 30 do not directly contact each other, which is advantageous in screw or bolted joints because it avoids stress on the adhesive. In this configuration, the contact end 53 includes a contact surface s52. Thus, the assembly 1 may include a component 25 disposed in the gap g between the first structural element 10 and the second profile 30. The component 25 is then configured to prevent liquid or dust from entering between the first structural element 10 and the second profile 30 at the level of the joining mechanism 50. For example, the component 25 is an adhesive, a sealant, or a joint compound.

[0069] Now refer to Figures 3 to 6In a non-limiting variation of the embodiment, the joining mechanism 50 may include an expandable element 60 including a joining surface s50, and an internal element 55 configured to be inserted into the interior of the expandable element 60 and to cause expansion of the expandable element 60 when the internal element 55 is inserted into the expandable element 60, thereby pushing the joining surface s50 toward the bonding surface s30. The internal element 55 may be a single-piece solid element. In order to cause expansion of the expandable element 60 when the internal element 55 is inserted into the expandable element 60, an internal element 55 may be provided that presents a cross-section perpendicular to the second direction Y, the cross-section increasing between an end of the internal element 55 facing the body 63 of the expandable element 60 and an end opposite to the body 63 of the expandable element 60. According to Figure 3 and Figure 4 In the variant represented by , the cross section of the inner element 55 perpendicular to the second direction Y gradually increases. In that case, the inner element 55 forms a slope on the outside, said slope being configured to cause the expansion of the inflatable element 60. Alternatively, as Figure 5 and Figure 6 As illustrated, the inner element 55 can include an arched or curved side s54. In other words, the side s54 is convex, with the apex of its convexity directed toward the expandable element 60, for example, toward a lateral protrusion 65 of the expandable element 60, described below. Advantageously, the presence of the arched side s54 on the inner element 55 allows the inner element 55 to rotate in the event of misalignment between the inner element 55 and the expandable element 60. Thus, the curved or arched side s54 allows for compensation of eventual deformation of the first structural element 10 and / or the second profile 30, thereby facilitating assembly of the assembly 1.

[0070] according to Figures 3 to 6 In the illustrated embodiment, the expandable element 60 includes at least one expansion agent 61, the expansion agent 61 including a body 63, the body including a portion of the fixation hole 51, the remaining portion of the fixation hole 51 being accommodated within the inner element 55. It is well understood that when the inner element 55 is inserted into the expandable element 60, the portion of the fixation hole 51 accommodated in the inner element 55 faces the portion of the fixation hole 51 included in the expandable element 60. In this way, a coupling mechanism 50 can be provided having a continuous fixation hole 51 that passes through both the inner element 55 and the expandable element 60.

[0071] The at least one expansion agent 61 may further include at least two lateral protrusions 65, each of which includes an engagement surface s50. Each lateral protrusion 65 is fixedly attached to the body 63 and can expand toward the bonding surface s30. For example, the at least one expansion agent 61 may include a generally U-shape, wherein each lateral protrusion 65 includes a proximal end 64 fixedly attached to the body 63 and a free distal end 66 opposite the proximal end 64.

[0072] Figures 3 to 6 A variation of shows an expandable element 60 comprising a first expansion agent 61 and a second expansion agent 61 . Figure 3 A and Figure 5 A illustrates the engagement mechanism 50 when the inner member 55 is positioned outside the expandable member 60. Figure 3 B and Figure 5 B illustrates the engagement mechanism 50 when the inner element 55 is inserted into the expandable element 60, thereby showing the expansion of the lateral protrusions 65. In addition, the lateral protrusions 65 of the first expandable element 61 are angularly offset from the lateral protrusions 65 of the second expandable element 61 about the second direction Y. In order to simplify the assembly of the expandable element 60, the angular offset between the lateral protrusions 65 of the first expandable element 61 and the lateral protrusions 65 of the second expandable element 61 can obviously be equal to 90°.

[0073] The assembly 1 further includes an adhesive 20 interposed between the engagement surface s50 of the engagement mechanism 50 and the bonding surface s30 of the second profile 30. The adhesive 20 is configured to allow adhesion between the engagement surface s50 and the bonding surface s30. As previously indicated, the bonding surface s30 covers all, a portion, or all of one surface of the second profile 30. Furthermore, the adhesive 20 may be provided on all or a portion of the bonding surface s30.

[0074] Advantageously, the engagement surface s50 of the engagement mechanism 50 includes a blocking roughness 67 configured to block translation of the engagement mechanism 50 within the fitting cavity 31 along the second direction Y. Thus, the blocking roughness 67 increases the bonding area between the bonding surface s30 and the adhesive 20. Consequently, the bonding between the second profile 30 and the engagement mechanism 50 is improved.

[0075] Finally, the assembly includes a fixing member 40, which includes a fixing rod 41 that is screwed into a fixing hole 51 of a coupling mechanism 50, and a bearing head 43 attached to the fixing rod 41 and resting on the first bearing surface s10 of the first structural element 10, thereby fixing the first structural element 10 by clamping the first structural element 10 and the coupling mechanism 50. Therefore, the fixing member 40 and the coupling mechanism 50 are configured to fix the first structural element 10 to the second profile 30. For example, the fixing hole 51 is a threaded hole, and the fixing member 40 is a screw or bolt suitable for being screwed into the threaded hole.

[0076] The arrangement described above makes it possible to provide an assembly 1 for a battery holder in which an interposed joining mechanism 50 allows, on the one hand, the fixing of the first structural element 10 by screw joining, and, on the other hand, the fixing of the second profile 30 by adhesive bonding. Advantageously, adhesive bonding between different structural elements (such as the profiles of the battery holder) allows the connection of two or more structural elements without the need for welding techniques while ensuring good structural performance. Furthermore, adhesive bonding can be more easily implemented on a large scale and limits deformation between the first structural element 10 and the second profile 30, making it a cost-effective solution for manufacturing battery holders.

Claims

1. An assembly (1) for a battery holder, comprising: - a first structural element (10) extending in a first direction (X) and comprising a first bearing surface (s10); a second profile (30) extending in a second direction (Y) different from the first direction (X), the second profile (30) presenting a hollow section internally delimiting a bonding surface (s30), and a fitting cavity (31); - an engagement mechanism (50) inserted into the fitting cavity (31) of the second profile (30) and comprising at least one fixing hole (51), the engagement mechanism (50) externally comprising an engagement surface (s50) facing the bonding surface (s30); - an adhesive (20) interposed between the joining surface (s50) of the joining mechanism (50) and the bonding surface (s30) of the second profile (30), the adhesive (20) being configured to allow bonding between the joining surface (s50) and the bonding surface (s30); - a fixing member (40), comprising: a fixing rod (41), the fixing rod being screwed into a fixing hole (51) of the coupling mechanism (50); and a bearing head (43) attached to the fixing rod (41) and resting on a first bearing surface (s10) of the first structural element (10) to fix the first structural element (10) by clamping the first structural element (10) with the engaging mechanism (50); The fixing member (40) and the joining mechanism (50) are thus configured to fix the first structural element (10) to the second profile (30).

2. The assembly (1) according to claim 1, wherein the first structural element (10) includes a first cooperating surface (sl2), which is opposite to the first bearing surface (s10) compared to the first structural element (10), and wherein the engaging mechanism (50) externally includes a contact surface (s52) extending transversely to the engaging surface (s50), and the contact surface (s52) of the engaging mechanism (50) is configured to lean against the first cooperating surface (sl2) of the first structural element (10) when the first structural element (10) is fixed to the engaging mechanism (50) by the fixing member (40).

3. The assembly (1) according to any one of claims 1 or 2, wherein the engagement mechanism (50) includes a contact end portion (53) that protrudes out of the mating cavity (31), thereby defining a gap (g) between the first structural element (10) and the second profile (30) when the first structural element (10) and the second profile (30) are fixed to each other by the fixing member (40) and the engagement mechanism (50).

4. The assembly (1) according to claim 3 further comprises a component (25) arranged in the gap (g) between the first structural element (10) and the second profile (30), the component (25) being configured to prevent liquid or dust from entering between the first structural element (10) and the second profile (30) at the level of the joining mechanism (50).

5. Assembly (1) according to claim 4, wherein the component (25) is an adhesive, a sealant or a joint compound.

6. A component (1) according to any one of claims 1 to 5, wherein the engaging surface (s50) of the engaging mechanism (50) includes a blocking rough structure (67), and the blocking rough structure is configured to block the translation of the engaging mechanism (50) along the second direction (Y) within the mating cavity (31).

7. Assembly (1) according to any one of claims 1 to 6, wherein the engagement means (50) is a one-piece solid element or a hollow profile.

8. A component (1) according to any one of claims 1 to 6, wherein the joining mechanism (50) includes an expandable element (60) having the joining surface (s50), and an internal element (55), the internal element being configured to be inserted into the expandable element (60), and causing the expandable element (60) to expand when the internal element (55) is inserted into the expandable element (60), thereby pushing the joining surface (s50) toward the bonding surface (s30).

9. Assembly (1) according to claim 8, wherein the inner element (55) is a one-piece solid element.

10. A component (1) according to any one of claims 8 or 9, wherein the internal element (55) presents a cross-section measured perpendicular to the second direction (Y), the cross-section gradually increasing to form a slope on the outside, and the slope is configured to cause expansion of the expandable element (60) when the internal element (55) is inserted into the expandable element (60).

11. A component (1) according to any one of claims 8 to 10, wherein the expandable element (60) includes at least one expansion agent (61), the at least one expansion agent including a main body (63) and at least two lateral protrusions (65), the main body including a portion of the fixing hole (51), the at least two lateral protrusions including the joining surface (s50), each lateral protrusion (65) being fixedly attached to the main body (63) and capable of expanding toward the bonding surface (s30).

12. The assembly (1) according to claim 11, wherein the expandable element (60) comprises a first expansion agent (61) and a second expansion agent (61), the lateral protrusion (65) of the first expansion agent (61) being angularly offset from the lateral protrusion (65) of the second expansion agent (61) about the second direction (Y).

13. Assembly (1) according to any one of claims 1 to 12, wherein the engagement means (50) comprises a metallic material.

14. Battery holder for a transport vehicle, comprising a frame and a base plate delimiting between them a housing intended to receive all or part of a battery, the frame comprising at least one assembly (1) according to any one of claims 1 to 13.

15. An electric or hybrid transportation vehicle comprising a battery holder according to claim 14.

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