Floor panel for an electric or hybrid motor vehicle

Abstract

The present invention relates to a floor for an electric or hybrid motor vehicle, comprising: a side sill (2), a battery housing (3) including a first side flange (13) extending laterally to and covering the first side sill (2) from below, and a second side flange (14) extending laterally to and covering the second side sill (2) from below, a plurality of structural spacers (18) located between at least one side surface of the housing and a generally vertical surface of the side sill (2), and a plurality of structural spacers (18) located between at least one side surface of the housing (3) and a generally vertical surface of the side sill, the side surface of the housing including at least one generally vertical upper region and a second lower region inclined at an angle between 30° and 60° relative to a longitudinal vertical plane XZ.

Description

Technical Field

[0001] The present invention generally relates to electric or hybrid vehicles, and more specifically to the side impact resistance of a battery housing housed in the floor of an electric or hybrid motor vehicle.

[0002] More specifically, the present invention relates to a floor plate for electric or hybrid motor vehicles, comprising a reinforcing member located between a side sill and a battery housing, and to a motor vehicle integrating such a floor plate. Background Technology

[0003] In current electric vehicles, electrical energy is stored in battery cells, which are housed in a casing located beneath the vehicle floor.

[0004] The packaging casing ensures the storage of the electrochemical cells that form the battery, typically achieved by including an intermediate package known as a battery module. The casing also helps provide frontal and side impact protection for the cells.

[0005] During a side impact, the battery must remain integrated with the vehicle body, and the battery modules that make up the battery must remain intact to avoid the risk of fire. This type of side impact is the subject of testing and numerical simulation, commonly referred to as "pole impact."

[0006] In a known manner, the battery packaging casing includes transverse beams called crossbeams, which ensure the rigidity of the packaging casing and resist the forces it bears.

[0007] The size of the battery packaging depends on the size of the electrochemical cell, while the position of the side sill is determined by the desired width of the vehicle, thus creating a noticeable gap between the side sill and the packaging.

[0008] Because of this gap, the force transmission between the side sill and the crossbeam is not optimal.

[0009] The side sill can be further reinforced by adding reinforcing elements to the hollow body that makes up the side sill, so as to reduce its flexural deformation.

[0010] However, these reinforcements are expensive and increase the vehicle's weight. Summary of the Invention

[0011] Therefore, the present invention aims to overcome the above-mentioned disadvantages and enhance the protection of the electrochemical cells of the battery stored in the packaging housing on the floor of an electric or hybrid motor vehicle when there is a gap between the packaging housing and the side threshold of the vehicle floor.

[0012] This invention relates to a floor plate for electric or hybrid motor vehicles, comprising: Each includes first and second side thresholds of a hollow body defined by a first wall and a second wall, and A battery packaging housing positioned between the first and second side thresholds, the packaging housing comprising: a first side flange facing the first side threshold and at least partially covering the first side threshold from below; and a second side flange facing the second side threshold and at least partially covering the second side threshold from below. A plurality of first structural spacers, distributed longitudinally and laterally positioned between a generally vertical surface of the first side surface of the packaging shell and the first side threshold, and A plurality of second structural spacers are distributed longitudinally and laterally positioned between the second side surface of the battery's packaging casing and the generally vertical surface of the second side threshold. The side surface of the packaging shell includes at least one generally vertical first upper region and at least one second lower region inclined at an angle between 30° and 60° relative to the longitudinal vertical plane XZ.

[0013] The components formed by the first and second side thresholds, structural spacers, and the packaging shell constitute structural continuity. This structural continuity concentrates energy absorption and deformation primarily within the first and second side thresholds during a side impact, while maintaining the integrity of the battery's packaging shell. The electrochemical cells housed within the packaging shell are thus protected during the impact.

[0014] Preferably, the battery packaging casing includes a plurality of transverse beams, each structural spacer being positioned facing one of the transverse beams and arranged on the longitudinal axis of the transverse beam itself.

[0015] In an embodiment, the cross-section of the first and second side flanges of the packaging shell, considered in the transverse vertical plane YZ, may have a generally L-shaped shape. The first side flange includes a first portion forming a first side surface of the packaging shell and a second portion extending from the first portion to a first side threshold, the second portion forming an angle of approximately 90° with respect to the first portion, and The second side flange includes a first portion forming a second side surface of the packaging shell and a second portion extending from a first end of the first portion to a second side threshold, forming an angle of approximately 90° with respect to the first portion.

[0016] Advantageously, the structural spacer can be made of hollow bodies, each hollow body originating from a sheet metal element formed by stamping and / or bending.

[0017] Preferably, the structural spacer includes an opening leading to a cavity in the hollow body, and preferably the opening is positioned facing one of the first and second side thresholds.

[0018] Preferably, the structural spacer includes a first side positioned facing one of the first and second side thresholds and a second side opposite to the first side and positioned facing the packaging shell, wherein the first side of the structural spacer is wider than the second side.

[0019] Advantageously, the structural spacer may include one or more fixing lugs for fixing the structural spacer, the fixing lugs extending from the free end of one side of the structural spacer.

[0020] Preferably, the structural spacer includes at least one stamped portion that extends generally in the lateral direction of the vehicle to enhance the rigidity of the structural spacer in that direction.

[0021] Preferably, the first side threshold and the second side threshold each include a threshold reinforcement extending longitudinally inside each side threshold, the first side flange being fixed to the threshold reinforcement of the first side threshold, and the second side flange being fixed to the threshold reinforcement of the second side threshold.

[0022] The present invention also relates to an electric or hybrid motor vehicle comprising a floor as described above. Attached Figure Description

[0023] The invention will be better understood through the following detailed description of embodiments, including those given for illustrative purposes only, and with reference to the accompanying drawings, which are provided to aid in the understanding and implementation of the invention and, where applicable, in defining it. Other objects, advantages, and features will become clear, in which: [ Figure 1 The image shows the floor of a hybrid or electric motor vehicle according to an embodiment of the present invention.

[0024] [ Figure 2 ]yes Figure 1 The top view of the base plate shown.

[0025] [ Figure 3A [ ] is a first side view of a reinforcing member for the floor of an electric or hybrid motor vehicle according to an embodiment of the present invention.

[0026] [ Figure 3B [ ] is a second side view of a reinforcing member for the floor of an electric or hybrid motor vehicle according to an embodiment of the present invention.

[0027] In the following description, the terms "longitudinal," "lateral," "vertical," "horizontal," "front," "rear," "left," "right," "lower," "upper," "lower," "upper," "above," and "below" are understood relative to the motor vehicle's usual orthogonal reference frame, which is in... Figure 1 , Figure 2 , Figure 3A and Figure 3B The text indicates and includes: - The horizontal axis X, extending from the front to the rear of the vehicle; - Horizontal axis, perpendicular to axis X, pointing from the left side of the vehicle moving forward to the right side of the transverse axis Y; - The vertical axis Z, orthogonal to axes X and Y, pointing upwards from the bottom.

[0028] In the description of this invention, the expression "at least one" should be regarded as equivalent to the expression "one or more".

[0029] The term "generally" means that the indicated direction or value is allowed to deviate slightly from a given nominal direction or value. For example, "generally vertical" means that in embodiments of the invention, it includes a deviation of about 10° from a strictly vertical direction. Detailed Implementation

[0030] Figure 1 A base plate 1 for electric or hybrid motor vehicles is shown.

[0031] The floor 1 includes a first side sill 2 and a second side sill extending along the longitudinal direction of the vehicle. Figure 1 (Not visible in the center). The first and second side sills 2 are also often referred to by the term "side members". The floor also includes the battery packaging housing 3. The technical definition of the floor is that it is symmetrical between the two sides of the vehicle with respect to the longitudinal vertical midplane XZ of the vehicle.

[0032] The first side threshold and the second side threshold 2 are positioned on both sides of the packaging shell 3.

[0033] Advantageously, the packaging shell 3 is arranged under the upper floor (not shown) of the base plate 1.

[0034] The battery housed in the packaging casing 3 can be packaged in the form of a battery module, with each battery module containing multiple electrochemical cells. In this embodiment, the packaging casing refers to the outer shell or protective casing of the battery.

[0035] In this invention, the threshold refers to a structural element, also known as a side member, which extends on each side of the floor and the housing 3 in the longitudinal direction X of the vehicle, particularly extending below the vehicle door.

[0036] In the illustrated example, the first and second side sills 2 on the right and left sides each define a hollow body extending along the longitudinal direction X of the vehicle, the hollow body being defined by a first wall 4 and a second wall 5 opposite each other according to the vehicle's transverse axis X. Each wall has a cross-section considered in the cutting plane YZ, which is generally U-shaped or Ω-shaped with the free ends of the U-shape extending outwards. The free ends of these walls form surfaces assembled to each other by welding. The free ends of the first wall 4 and the second wall 5 are preferably (as illustrated) connected in a generally vertical plane of the vehicle. The first wall 4 is also referred to as a "body side reinforcement". The second wall 5 is also referred to by those skilled in the art as a "sill closure".

[0037] The second wall 5 of each of the first and second side thresholds 2 includes a generally vertical portion that defines the central part of the U-shape facing the packaging shell 3, and two horizontal portions that form the side branches of the U-shape, namely the lower portion and the upper portion.

[0038] Furthermore, the first and second side sills 2 each preferably include a sill reinforcement 6, more preferably arranged within a hollow body. The sill reinforcement 6 also extends along the longitudinal direction X of the vehicle, inside the hollow body of the sill 2.

[0039] In the illustrated example, the sill reinforcement 6 has an angle steel shape, and is particularly rigid, comprising a first part and a second part, 7 and 8 respectively. This angle steel shape is considered in a cross-section along the vehicle's cutting plane YZ.

[0040] In the illustrated embodiment, the second portion 8 extends from the first portion 7 and forms a generally 90° angle with respect to the first portion 7.

[0041] Preferably, the first portion 7 of each threshold reinforcement 6 extends substantially vertically along the vertical portion of the second wall 5 of one of the first side thresholds and the second side threshold 2, and the second portion 8 extends substantially horizontally along the lower horizontal portion of the second wall 5 of one of the first side thresholds and the second side threshold 2.

[0042] refer to Figure 2 The packaging shell 3 shown in the figure includes opposing first and second sides, 9 and 10 respectively, and opposing front and rear sides, 11 and 12 respectively.

[0043] The packaging shell 3 includes a first side flange 13 and a second side flange 14.

[0044] In the illustrated example, the first side flange 13 and the second side flange 14 have an L-shape.

[0045] The first side flange 13 facing the first threshold 2 includes a generally vertical first portion formed by the first side 9 of the packaging shell 3, and a generally horizontal second portion 15 extending from the first portion 9, preferably at a generally 90° angle.

[0046] In the illustrated example, the second part 15 extends from the lower end of the first part 9 of the first side flange 13 of the packaging shell 3.

[0047] The second side flange 14, arranged facing the second threshold 2, includes a generally vertical first portion formed by the first side 10 of the packaging shell 3, and a generally horizontal second portion 16 extending from the first portion 10, preferably at a generally 90° angle.

[0048] The second part 16 extends from the lower end of the first part 10 of the second side flange 14 of the packaging shell 3.

[0049] The second portion 15 of the first side flange 13 advantageously extends to the first side sill 2 by supporting the first side sill 2 from below. The second portion 16 of the second side flange 14 advantageously extends to the second side sill by supporting the second side sill from below.

[0050] Preferably, the first side flange 13 is secured to the first side sill 2 by a fixing device 17, and even more preferably to the sill reinforcement 6 of the first side sill 2. This arrangement and this fixing clamp the second wall 5 of the relevant sill between the sill reinforcement 6 and the first side flange 13. Fixing is typically achieved by a series of screws distributed along the sill, each screw engaging with a corresponding nut riveted or welded to the sill structure.

[0051] Symmetrically, the first side flange 14 is preferably fixed to the second side sill 2 by a fixing device 17, and more preferably to the sill reinforcement 6 of the second side sill 2. This arrangement and fixing clamps the second wall 5 of the relevant sill between the sill reinforcement 6 and the second side flange 14. Fixing is typically achieved by a series of screws distributed along the sill, each screw engaging with a corresponding nut riveted or welded to the sill structure.

[0052] In the illustrated embodiment, the second portion 15 of the first side flange 13 is fixed to the lower horizontal portion of the second wall 5 of the first side threshold 2, and the second portion 16 of the second side flange 14 is fixed to the lower horizontal portion of the second wall 5 of the first side threshold.

[0053] Furthermore, the floor plate 1 includes a plurality of structural spacers 18 arranged on each side of the vehicle, one between the housing 3 and the first side sill 2, and the other between the housing 3 and the second side sill. More precisely, a series of structural spacers 18 are distributed along the longitudinal direction X of the vehicle between the housing 3 and each side sill 2.

[0054] The assembly formed by the first side flange 13 of the packaging case 3 and the structural spacer 18 positioned between the packaging case 3 and the first side rocker 2 is free of gap between the packaging case 3 and the first side rocker 2 to create a structural continuity that will concentrate the energy absorption and deformation mainly in the rocker during a side impact, while preserving the integrity of the packaging case 3 of the battery. The goal is to protect the electrochemical cells during an impact.

[0055] Symmetrically, the assembly formed by the second side flange 14 of the packaging case 3 and the structural spacer 18 positioned between the packaging case 3 and the second side rocker is free of gap between the last two.

[0056] In the illustrated embodiment, the structural spacer 18 is fixed on the second wall 5 of one of the first and second rockers 2. This fixation is generally made by welding. In Figure 1 and Figure 2 In the illustrated embodiment, a gap is provided between the structural spacer and the packaging case 3 to account for geometric manufacturing deviations and to facilitate assembly. This gap is about 5 to 15 mm, in particular about 10 mm.

[0057] In alternative embodiments not shown, the structural spacer 18 can be fixed on the packaging case 3, or if other means of compensating for geometric deviations are provided in the assembly between the packaging case 3 and each side rocker 2, the structural spacer 18 can be fixed both on the packaging case 3 and on one of the first and second side rockers 2.

[0058] With reference to Figure 3A and Figure 3B The illustrated structural spacer 18 comprises a hollow body formed by a plurality of walls delimiting a cavity 19 and forming a housing.

[0059] In the illustrated embodiment, the hollow body of the structural spacer 18 comprises a front wall 18a, a rear wall 18b opposite the front wall 18a, a lower wall 18c, an upper wall 18d opposite the lower wall 18c, and a side wall 18e.

[0060] The hollow body of the illustrated structural spacer 18 further comprises an opening 20 opening into the cavity 19. The opening 20 is delimited by the free ends of the front wall 18a, the rear wall 18b, the lower wall 18c and the upper wall 18d.

[0061] Each structural spacer 18 comprises a first side edge of the corresponding opening 20, oriented towards the outside of the vehicle and positioned to face one of the first and second side rockers 2. Each structural spacer 18 comprises an opposite second side edge, oriented towards the inside of the vehicle and positioned to face the packaging case 3, in the illustrated embodiment formed by the side wall 18e.

[0062] Preferably, the structural spacer 18 has a flared portion, and the first side of the structural spacer 18 is wider than the second side.

[0063] Preferably, the flared first side of the opening 20 of each structural spacer 18 is positioned to face one of the first side thresholds and the second side threshold 2.

[0064] In embodiments of the invention, each structural spacer 18 is made of sheet metal, formed by stamping and / or bending. Prior to forming, the initial sheet metal consists of a central strip defining sequentially juxtaposed walls 18c, 18e, and 18d, and two extensions located on either side of the central strip defining a front wall 18a and a rear wall 18b after the spacer is formed. The extensions extend laterally to side walls 18e. The names of these walls are assigned according to the final arrangement of the structural spacers 18, such as… Figure 1 and Figure 2 As shown.

[0065] The lower wall 18c and the side wall 18e form an angle between 120° and 150°, typically about 135° (90° + 45°) in the illustrated embodiment. The side wall 18e and the upper wall 18d form an angle between 30° and 60°, more particularly about 45°. The side wall 18e passes through... Figure 1 A generally vertical central planar portion connects to the upper wall, and this planar portion is arranged facing the first side surface 9, 10 of the first or second side flange of the packaging housing 3. During the forming process of the structural spacer 18, the extensions are first bent relative to the side wall 18e so that they eventually face each other generally. Each extension includes a central free edge that bends outward at a generally right angle, thereby forming a fixing lug 23 for securing the spacer to one or the other side sill 2. Figure 3A , Figure 3B Each extension also includes an upper free edge and a lower free edge, which are bent inwards from the spacer 18 at approximately right angles. The upper free edge of the extension defines a support surface, against which the upper wall 18d is bent and fixed, typically by welding. The lower free edge of the extension defines a support surface, against which the lower wall 18c is bent and fixed, typically by welding. The bend line between the side wall 18e and the extension includes a notch at the end of the side wall that allows the wall of the central strip to bend between the extension and the extension.

[0066] In the illustrated embodiment, the structural spacer 18 includes a stamped portion 21 to increase the rigidity of the component.

[0067] According to the illustrated embodiment, each structural spacer 18 includes two stamped portions 21 on its extensions, namely on the front wall 18a and the rear wall 18b. The stamped portions 21 are grooves provided on the outer sides of the front wall 18a and the rear wall 18b. These grooves are generally elongated straight lines extending generally along the lateral direction Y of the vehicle, corresponding to the direction of the force transmitted by the side sill during a side impact. The function of these stamped portions 21 is to enhance the rigidity of the structural spacer 18 to avoid or, as far as possible, limit its crushing during a side impact.

[0068] like Figure 3A As shown, the fixing ear piece 23 also includes a stamped part in its middle section, which is intended to enhance the rigidity of the relevant area.

[0069] In an embodiment variation not shown in this invention, the structural spacer 18 may be a stamped part, a molded part, a forging part, an extruded part extruded in an extrusion direction parallel to the longitudinal direction X, the transverse direction Y, or the vertical direction Z of the vehicle, or a 3D printed part.

[0070] Structural spacer 18 is inserted on each side of the vehicle, located between the first side sill or the second side sill 2 and the housing 3. The shape of structural spacer 18 is complementary to the shape of the first side flange 13 and the second side flange 14.

[0071] The first side flange 13 and the second side flange 14 each include a side surface defining one or more support regions of the structural spacer 18 in the event of a lateral impact. The first upper region is generally vertical and extends from a second lower region at an angle between 30° and 60° relative to the longitudinal vertical plane XZ. Figure 1 In the embodiment shown, the second lower region of the side surface is inclined at an angle of approximately 45° relative to the plane XZ. The second lower region defines the support portions, 24 and 25, which are located at the corners of the L-shape ( Figure 1 and Figure 2 The support is designed to enhance the mechanical strength between the first and second portions of each side flange 13, 14. The support is generally triangular in cross-section YZ. On each side of the battery, the angle steel is arranged in the corner formed by the first side faces 9, 10 of the corresponding side edges and the second portions 15, 16 of the same side edges.

[0072] Supports 24 and 25 are arranged facing the side wall 18e of the structural spacer 18. The supports are generally parallel to the side wall 18e of the structural spacer 18.

[0073] refer to Figure 1 Each side flange 13, 14, consisting of a first part (first side 9, 10), a second part 15, 16, and a support, is an integral extruded profile assembly derived from an extrusion die, which includes internal reinforcing ribs extending in the same longitudinal direction X along the side flange.

[0074] It should be noted that each side flange 13, 14 has a side surface oriented toward the adjacent side threshold 2, which is composed of an upper region of the first part (first side surface 9, 10) extending from the 45° inclined upper surface of the support 24.

[0075] The heights of the first sides 9 and 10, considered along the vertical direction Z, roughly correspond to the height of the packaging shell 3, allowing the upper and lower enclosed panels of the packaging shell 3 to pass through. Figure 1 In the embodiment shown, the lower panel and the upper panel invade the first side 9, 10 by substantially covering the first side across its entire width.

[0076] like Figure 1 and Figure 2 As shown, the base plate 1 preferably includes a plurality of structural spacers 18 distributed along the longitudinal direction X of the vehicle between the first side sill 2 and the packaging shell 3. Symmetrically, the base plate includes a plurality of structural spacers distributed along the longitudinal direction X of the vehicle between the second side sill and the packaging shell 3. The structural spacers are generally evenly distributed, i.e., there is a substantially equal distance between two consecutive structural spacers. Figure 2 In the embodiment shown, the base plate 1 includes a series of five structural spacers 18 regularly distributed on both sides of the packaging shell 3.

[0077] Advantageously, the packaging shell 3 includes a plurality of transverse beams 22, each transverse beam extending within the internal volume of the packaging shell 3 along its own longitudinal axis, which extends along the transverse axis Y of the vehicle. Figure 2 ).

[0078] Each structural spacer 18 is positioned as one of the transverse beams 22 facing the transverse beam, more precisely on the longitudinal axis of the transverse beam itself.

[0079] Structural spacers 18 constrain the side sill 2 from deformation and bending during a side impact. These structural spacers 18 are not specifically designed to distribute loads along the longitudinal direction of the battery housing 3 (this function is ensured by the sill). The structural spacers 18 are designed to be as rigid as possible and are configured to be non-deformable. The stamped portions 21 on the vertical sides of the structural spacers 18 extend substantially along the vehicle's lateral direction Y, corresponding to the direction of the side impact, indicating that these lateral structural spacers 18 are intended to be rigid in that direction. Nevertheless, when a side impact causes the side sill 2 to deform and / or bend, the resultant force of one or more structural spacers 18 toward the vehicle interior brings them into contact with the corresponding side flanges 13, 14 of the battery housing 3. The structural spacers 18, positioned in alignment with the transverse beam 22, then abut against the housing 3 to better resist residual forces transmitted by the side sill 2.

[0080] exist Figure 1 In the embodiment shown, the threshold reinforcement 6 and the structural spacer 18 are positioned on both sides of the second wall 5 arranged facing the packaging shell 3 on the first side threshold and the second side threshold 2.

[0081] The structural spacer 18, along with the first side flange 13 and the second side flange 14, defines the load path between the side sill 2 and the packaging shell 3. This load path allows energy absorption and induced deformation to be concentrated within the structure of each side sill 2 while maintaining the integrity of the packaging shell 3.

[0082] Structural spacer 18 ensures structural continuity while being particularly compact, reducing vehicle weight and freeing up space in the vehicle floor to allow welding fixtures or robots to pass through to apply sealing beads, or to allow operator hands to pass through to secure equipment.

[0083] According to an embodiment, the structural spacer 18 may be made of steel or aluminum.

[0084] In other embodiments of the invention not shown, the structural spacer may be fixed to the packaging housing or floor.

Claims

1. A floor for an electric or hybrid motor vehicle, the floor extending in a longitudinal direction (X) and comprising: Each includes first and second side thresholds (2) of the hollow body defined by the first wall (4) and the second wall (5), and A battery packaging housing (3) positioned between the first and second side thresholds (2), the packaging housing (3) comprising: a first side flange (13) facing the first side threshold (2) and at least partially covering the first side threshold from below; and a second side flange (14) facing the second side threshold (2) and at least partially covering the second side threshold from below. The base plate is characterized in that: - The first side flange (13) and the second side flange (14) of the packaging shell (3) each include: a first portion (9, 10) forming one side of the packaging shell (3); and a second portion (15, 16) extending from the first portion (9, 10) to the first side threshold (2), the second portion forming an angle of about 90° with respect to the first portion, the second portion at least partially covering the corresponding side threshold (2) from below. - The first side flange (13) and the second side flange (14) each further include a triangular support portion (24, 25) positioned in the corner between the first portion (9, 10) and the second portion (15, 16) of the respective side flange. The first side flange (13) and the second side flange (14) thereby form the first side surface and the second side surface of the packaging shell (3), respectively. Each of the first and second side surfaces includes: a generally vertical first upper region formed by the first portions (9, 10); and a second lower region formed by the support portions (24, 25) at an angle between 30° and 60° relative to the longitudinal vertical plane; and - The base plate further includes: a plurality of first structural spacers (18) distributed along the longitudinal direction (X) and laterally positioned between a first side surface of the packaging shell (3) and a generally vertical surface of the first side threshold (2); and a plurality of second structural spacers (18) distributed along the longitudinal direction (X) and laterally positioned between a second side surface of the packaging shell (3) of the battery and a generally vertical surface of the second side threshold.

2. The base plate according to claim 1, characterized in that, The battery's packaging housing (3) includes a plurality of transverse beams (22), each of the structural spacers (18) being positioned facing one of the plurality of transverse beams (22) and arranged on the longitudinal axis of the transverse beam (22) itself.

3. The base plate according to claim 1 or 2, characterized in that, The structural spacer (18) is composed of hollow bodies, each of which is derived from a metal sheet element formed by stamping and / or bending.

4. The base plate according to claim 3, characterized in that, The structural spacer (18) includes an opening (20) leading to a cavity (19) of the hollow body, preferably the opening (20) being positioned facing one of the first and second side thresholds (2).

5. The base plate according to any one of claims 1 to 4, characterized in that, The structural spacer (18) includes a first side positioned facing one of the first and second side thresholds (2) and a second side opposite the first side and positioned facing the packaging shell (3), wherein the first side of the structural spacer (18) is wider than the second side.

6. The base plate according to any one of claims 1 to 5, characterized in that, The structural spacer (18) includes one or more fixing lugs (23) for fixing the structural spacer (18), the fixing lugs (23) extending to the free end of one side of the structural spacer (18).

7. The base plate according to any one of claims 1 to 6, characterized in that, The structural spacer (18) includes at least one stamped portion (21) that extends generally along the lateral direction (Y) of the vehicle to enhance the rigidity of the structural spacer (18) in the lateral direction of the vehicle.

8. The base plate according to any one of claims 1 to 7, characterized in that, The first and second side thresholds (2) each include a threshold reinforcement (6) extending in the longitudinal direction (X) inside each side threshold, the first side flange (13) being fixed to the threshold reinforcement (6) of the first side threshold (13), and the second side flange (14) being fixed to the threshold reinforcement (6) of the second side threshold.

9. An electric or hybrid motor vehicle comprising a floor (1) according to any one of the preceding claims.

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