Vehicle underbody structure

Abstract

The present disclosure provides a vehicle lower structure capable of bonding an upper surface of a battery module and a lower surface of a cover via an adhesive layer of a prescribed layer thickness. The vehicle lower structure has: a battery module having a plurality of battery cells arranged along a prescribed direction and a thermal insulator provided between adjacent battery cells, the battery module being disposed in a lower portion of a vehicle; and a cover having a protruding portion protruding from a lower surface, the protruding portion being joined to an upper surface of the battery module via an adhesive layer with the protruding portion being supported by the thermal insulator.

Description

Technical Field

[0001] This disclosure relates to the vehicle's substructure. Background Technology

[0002] A battery mounting structure is known in which a battery housing that houses a battery module (battery pack) is mounted on the underside of a floor panel (floor chassis) (for example, see Japanese Patent Application Publication No. 2018-202946). In this battery mounting structure, the upper cover of the battery housing that covers the upper surface of the battery module also serves as the floor panel.

[0003] However, for example, in order to protect the battery module, it is considered to place a cover plate between the battery module and the top cover, and bond the upper surface of the battery module to the lower surface of the cover plate via an adhesive layer.

[0004] However, when bonding the upper surface of the battery module to the lower surface of the cover plate with an adhesive layer, it is difficult to manage the thickness of the adhesive layer. If there is a part where the thickness of the adhesive layer is thinner than the set thickness, the bonding strength in that part may be insufficient. Summary of the Invention

[0005] This disclosure provides a vehicle lower structure capable of bonding the upper surface of a battery module to the lower surface of a cover plate via an adhesive layer of a specified thickness.

[0006] The first embodiment of the vehicle substructure includes: a battery module having a plurality of battery cells and a heat insulation component, the plurality of battery cells being arranged in a predetermined direction, the heat insulation component being disposed between adjacent battery cells, the battery module being disposed in the lower part of the vehicle; and a cover having a protrusion protruding from a lower surface, the protrusion being bonded to the upper surface of the battery module via an adhesive layer while supported by the heat insulation component.

[0007] According to the vehicle substructure of the first embodiment, the battery module is disposed in the lower part of the vehicle. The battery module has multiple battery cells and heat insulation components. The multiple battery cells are arranged along a predetermined direction. Additionally, heat insulation components are provided between adjacent battery cells.

[0008] The cover has a protrusion. The protrusion protrudes from the lower surface of the cover. The cover is bonded to the upper surface of the battery module via an adhesive layer, with the protrusion supported by the insulation of the battery module.

[0009] Here, when the upper surface of the battery module is bonded to the lower surface of the cover plate via an adhesive layer, the protrusion of the cover plate is supported by the heat insulation components between adjacent battery cells, thereby forming a predetermined gap between the upper surface of the battery module and the lower surface of the cover plate. This gap allows the adhesive layer bonding the upper surface of the battery module to the lower surface of the cover plate to have a predetermined thickness.

[0010] Therefore, in this method, the upper surface of the battery module and the lower surface of the cover plate can be bonded together via an adhesive layer of a specified thickness.

[0011] In the second type of vehicle substructure, in the first type of vehicle substructure, the heat insulation element is formed as a sheet sandwiched between adjacent battery cells, and the protrusion is provided as a rib along the heat insulation element.

[0012] According to the second embodiment of the vehicle lower structure, the heat insulation component is formed as a sheet sandwiched between adjacent battery cells. Furthermore, the protrusion is provided as a rib along the sheet-like heat insulation component.

[0013] Therefore, when the upper surface of the battery module is bonded to the lower surface of the cover plate via an adhesive layer, a specified gap is formed along the entire length of the rib between the upper surface of the battery module and the lower surface of the cover plate by using the heat-insulating support rib.

[0014] Therefore, the adhesive layer that bonds the upper surface of the battery module to the lower surface of the cover plate can be made to have a specified thickness throughout the entire length of the rib.

[0015] In the third type of vehicle substructure, in the second type of vehicle substructure, the battery module has a plurality of heat-insulating members disposed on both sides of the adhesive layer, and the cover plate has a plurality of ribs on both sides of the adhesive layer respectively supported by the heat-insulating members.

[0016] According to the third-party vehicle substructure, the battery module has multiple heat-insulating components disposed on both sides of the adhesive layer. Additionally, the cover plate has multiple ribs on both sides of the adhesive layer, each supported by a heat-insulating component.

[0017] Therefore, when bonding the upper surface of the battery module to the lower surface of the cover plate via the adhesive layer, the ribs disposed on both sides of the adhesive layer restrict the flow of the adhesive layer before curing. Thus, for example, leakage of the adhesive layer before curing from between the upper surface of the battery module and the lower surface of the cover plate can be suppressed.

[0018] In the fourth type of vehicle substructure, in any one of the first to third types of vehicle substructure, the vehicle substructure includes a battery housing, the battery housing has an upper cover portion covering the cover plate, and the battery housing houses the battery module and the cover plate, and at least a portion of the upper cover portion forms the floor of the vehicle compartment.

[0019] According to the fourth embodiment of the vehicle substructure, a battery housing is provided. The battery housing houses the battery module and a cover plate. The battery housing has an upper cover portion that covers the cover plate. At least a portion of the upper cover portion forms the floor of the vehicle compartment.

[0020] Therefore, in this method, the number of parts can be reduced compared to the case where the floor of the vehicle compartment is formed by a floor panel that is different from the top cover.

[0021] On the other hand, when the floor of the vehicle compartment is formed by the cover, the weight of the occupants is locally transferred to the upper surface of the battery module as a vertical load through the cover, which makes the battery module prone to damage.

[0022] In contrast, in this method, the vertical load acting on the upper cover is transferred to the insulation component via the protrusion of the cover plate, and is also distributed to the upper surface of the battery module via the cover plate and the adhesive layer. Therefore, damage to the battery module can be suppressed.

[0023] In the fifth type of vehicle substructure, the lower surface of the upper cover is bonded to the upper surface of the cover plate.

[0024] According to the fifth method of vehicle substructure, the lower surface of the upper cover is bonded to the upper surface of the cover plate. That is, the upper surface of the battery module is bonded to the lower surface of the upper cover via the cover plate.

[0025] For example, when a collision occurs between a vehicle and a battery housing, the battery module inside the battery housing moves relative to the collision object due to inertial forces, and the collision object may interfere with the battery module.

[0026] In contrast, in this method, as described above, the upper surface of the battery module is bonded to the lower surface of the upper cover via a cover plate. Therefore, when a collision occurs between a colliding object and a vehicle carrying the battery casing, the upper cover, cover plate, and battery module can easily move together as a unit towards the side opposite to the colliding object. Thus, interference from the colliding object with the battery module can be suppressed.

[0027] According to this disclosure, as an example, the upper surface of the battery module and the lower surface of the cover plate can be bonded together via an adhesive layer of a specified thickness. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of a vehicle with a vehicle substructure applied according to one embodiment, viewed from the vehicle width direction.

[0029] Figure 2 It means Figure 1 The image shows a top view of the battery module.

[0030] Figure 3 yes Figure 2 3-3 line section view.

[0031] Figure 4 It is obtained by disassembling the battery module, top cover, and cover plate. Figure 3 The corresponding anatomical view. Detailed Implementation

[0032] Hereinafter, an embodiment will be described with reference to the accompanying drawings. Furthermore, in the figures, arrow FR appropriately indicates the front side of the vehicle (front side in the vehicle's longitudinal direction), and arrow UP indicates the upper side of the vehicle (upper side in the vehicle's vertical direction). Additionally, arrow OUT indicates the outer side in the vehicle's width direction. Furthermore, unless otherwise specified, "front / rear," "up / down," and "left / right" in the following description refer to the front / rear direction of the vehicle, the vertical direction of the vehicle, and the left / right direction in the vehicle's width direction, respectively.

[0033] (vehicle)

[0034] exist Figure 1 The image shows a vehicle 10 that utilizes the vehicle substructure described in this embodiment. The vehicle 10 is, for example, an electric vehicle powered by an electric motor (not shown) or a hybrid vehicle powered by both an electric motor and an internal combustion engine.

[0035] (Storage battery)

[0036] A battery (battery pack) 20 is mounted on the lower part of the vehicle 10. The battery 20 is configured to span a pair of door sills (not shown) on both sides of the vehicle 10 in the vehicle width direction. The battery 20 includes multiple battery modules 30, battery housings 40, and multiple covers 60.

[0037] (Battery module)

[0038] like Figure 2 As shown, multiple battery modules (battery packs) 30 are arranged along the longitudinal direction of the vehicle and along the width direction of the vehicle. The two ends of each battery module 30 along its length are fixed to the lower cover 42 of the battery housing 40 (described later) via end plates 34. Figure 1 ).

[0039] Each battery module 30 has multiple battery cells 32 and multiple heat insulation components 36. The multiple battery cells 32 are configured as batteries (secondary batteries) for storing electricity supplied to the aforementioned electric motors, etc. These battery cells 32 are arranged along the length of the battery module 30.

[0040] Each battery cell 32 is formed into a flat cuboid shape. Furthermore, each battery cell 32 is arranged with its length direction corresponding to the vehicle's width direction and its thickness direction corresponding to the vehicle's front-to-rear direction. These battery cells 32 are connected in series in a stacked manner along the length of the battery module 30.

[0041] like Figure 3As shown, a heat insulation element 36 is provided between adjacent battery cells 32. By using this heat insulation element 36 to insulate the adjacent battery cells 32, for example, when one adjacent battery cell 32 becomes hot, the impact of heat on the other adjacent battery cell 32 can be reduced.

[0042] The insulation element 36 is formed into a sheet shape, for example, from asbestos, glass wool, or foam material. Furthermore, the insulation element 36 is sandwiched between the sides of adjacent battery cells 32. Specifically, the insulation element 36 is held in a state where it is sandwiched between the sides of adjacent battery cells 32. This insulation element 36 is arranged along the length of the battery cell 32 and extends from the lower end to the upper end of the battery cell 32.

[0043] Furthermore, a cover plate 60, described later, is adhered to the upper surface 30U of the battery module 30. Additionally, the upper surface 30U of the battery module 30 is a concept encompassing the upper surface of the battery cells 32 and the upper surface of the insulation component 36.

[0044] (Battery casing)

[0045] like Figure 1 As shown, multiple battery modules 30 are housed in a battery housing 40. The battery housing 40 is generally formed in a flat, box-like shape and is disposed on the lower side of a battery frame (not shown). The battery housing 40 has a lower cover 42 and an upper cover 52 that are divided in the vertical direction of the vehicle.

[0046] The lower cover 42 is formed of a metal plate such as steel plate. In addition, the lower cover 42 is formed into a box shape with an opening on the upper side, forming the lower part of the battery housing 40. The lower wall (bottom wall) of the lower cover 42 becomes the lower cover part 44 that covers the lower surface of the plurality of battery modules 30 from the lower side.

[0047] The lower cover 44 is plate-shaped and is positioned with its thickness along the vertical direction of the vehicle. Additionally, a flange 46 extending outwards is provided at the end of the lower cover 42 on its open side. An upper cover 52 is disposed on the upper side of the lower cover 42.

[0048] The top cover 52 is formed of a metal plate such as steel. Furthermore, the top cover 52 is box-shaped with an opening at the bottom, forming the upper part of the battery housing 40. The upper wall (top wall) of this top cover 52 becomes a top cover portion 54 that covers the upper surface 30U of the plurality of battery modules 30 from above. The top cover portion 54 is plate-shaped and arranged with its thickness direction aligned with the vertical direction of the vehicle.

[0049] An outwardly extending flange 56 is provided at the end of the upper cover 52 on the opening side. The flange 56 of the upper cover 52 and the flange 46 of the lower cover 42 are joined together by bolts and nuts (not shown) in an overlapping state in the vertical direction of the vehicle.

[0050] The upper cover portion 54 forms the floor of the vehicle compartment 12. In other words, the upper cover portion 54 also serves as the floor panel that forms the floor of the vehicle compartment 12. For example, a seat crossbeam (not shown) extending along the width direction of the vehicle and a crossbeam (not shown) constituting the battery frame are disposed on the upper surface of the upper cover portion 54.

[0051] Alternatively, a portion of the floor of the cabin 12 can be formed by a part of the upper cover portion 54. That is, the floor of the cabin 12 can also be formed by at least a part of the upper cover portion 54. Furthermore, the floor of the cabin 12 can be formed, for example, by the upper cover portion 54 and the floor panel.

[0052] (Cover plate)

[0053] like Figure 2 As shown, a plurality of cover plates 60 are housed in the battery housing 40. The cover plates 60 serve as protective components for the upper surface 30U of the battery module 30. Furthermore, the cover plates 60 are clamped to the upper cover portion 54 (see reference 54). Figure 3 It also functions as a load-distributing component (surface pressure-distributing component) between the top cover 54 and the battery module 30, distributing the vertical load from the top cover 54 to the upper surface 30U of the battery module 30.

[0054] Multiple covers 60, for example, are made of resin (resin panels) and are arranged with their thickness direction aligned with the vertical direction of the vehicle. Furthermore, the multiple covers 60 are formed into a rectangular shape with the longitudinal direction of the vehicle as its length. These covers 60 are spaced apart in the width direction of the vehicle and are located on the upper surfaces 30U of the multiple battery modules 30. Additionally, each cover 60 extends from one end of the battery module 30 along its length to the other end.

[0055] like Figure 3 and Figure 4 As shown, the upper surface 60U of the cover plate 60 is bonded to the lower surface 54L of the upper cover portion 54. Specifically, the upper surface 60U of the cover plate 60 and the lower surface 54L of the upper cover portion 54 are bonded together via an adhesive layer 58. The adhesive layer 58 is formed, for example, by a cured silicone adhesive. Furthermore, the material of the adhesive layer 58 can be appropriately changed.

[0056] The lower surface 60L of the cover plate 60 is bonded to the upper surface 30U of the battery module 30. Specifically, the lower surface 60L of the cover plate 60 and the upper surface 30U of the battery module 30 are bonded together via multiple adhesive layers 70. The adhesive layers 70 are formed, for example, by a cured polyurethane adhesive. Furthermore, the material of the adhesive layers 70 can be appropriately changed.

[0057] Here, the upper surface 30U of the battery module 30 is formed by the upper surfaces of a plurality of battery cells 32 arranged along the length of the battery module 30. Due to manufacturing errors of the battery cells 32, there may be height differences between the upper surfaces of the plurality of battery cells 32.

[0058] In contrast, in this embodiment, the height difference between the upper surfaces of the plurality of battery cells 32 is absorbed by bonding the lower surface 60L of the cover plate 60 to the upper surface 30U of the battery module 30 via the adhesive layer 70. As a result, the lower surface 60L of the cover plate 60 and the upper surface 30U of the battery module 30 are bonded with a specified adhesive strength.

[0059] (rib)

[0060] A plurality of ribs 62 are provided on the lower surface 60L of the cover plate 60. These ribs 62 serve to ensure a predetermined gap between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60 when the upper surface 30U of the battery module 30 is bonded to the lower surface 60L of the cover plate 60. Figure 3 The spacer (corresponding to the specified layer thickness t) plays a role. Additionally, rib 62 is an example of a protrusion.

[0061] As an example, a plurality of ribs 62 are integrally formed with the cover plate 60 by means of resin. In addition, the plurality of ribs 62 extend along the width direction (vehicle width direction) of the cover plate 60, from one end to the other end of the width direction of the cover plate 60. In addition, the plurality of ribs 62 are arranged at intervals along the length direction (vehicle front-rear direction) of the cover plate 60.

[0062] Multiple ribs 62 protrude downwards from the lower surface 60L of the cover plate 60. Each rib 62 has a rectangular cross-sectional shape. In addition, the lower surface 62L of each rib 62 is a generally horizontal and flat surface.

[0063] Here, as Figure 3 As shown, multiple ribs 62 are supported by multiple heat insulation members 36 constituting the battery module 30. Specifically, the multiple ribs 62 are spaced apart along the length of the cover plate 60 according to the positions of the multiple heat insulation members 36. The lower surfaces 62L of these ribs 62 are supported in contact with the upper ends 36U of the multiple heat insulation members 36 respectively. As a result, a predetermined gap is formed between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60.

[0064] The height (protrusion amount) h of each rib 62 protruding from the lower surface 60L of the cover plate 60 is set according to the design value of the specified layer thickness t of the adhesive layer 70. Furthermore, the ribs 62 are disposed on both sides of the adhesive layer 70. In other words, an adhesive layer 70 is provided between adjacent ribs 62. Thus, with the lower surfaces 62L of the plurality of ribs 62 respectively supported on the upper ends 36U of the plurality of insulation members 36, an adhesive layer 70 with a specified layer thickness t corresponding to the height h of the rib 62 is formed between adjacent ribs 62.

[0065] (Brain module and cover plate bonding method)

[0066] Next, an example of the bonding method between the battery module 30 and the cover plate 60 will be described.

[0067] When bonding the upper surface 30U of the battery module 30 to the lower surface 60L of the cover plate 60 via the adhesive layer 70, for example, a coating exceeding the height h of the rib 62 of the cover plate 60 is applied to a designated portion of the upper surface 30U of the battery module 30 (refer to...). Figure 3 Adhesive of a certain thickness.

[0068] In this state, the lower surface 60L of the cover plate 60 is placed on the upper surface 30U of the battery module 30 via an adhesive, so that the adhesive spreads between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60.

[0069] At this time, the adhesive applied to the upper surface 30U of the battery module 30 is positioned between adjacent ribs 62. In addition, the adjacent ribs 62 are arranged along the heat insulation members 36 disposed on both sides of the adhesive, and the upper ends 36U of these heat insulation members 36 support the lower surface 62L of the adjacent ribs 62.

[0070] Therefore, as Figure 3 As shown, an adhesive layer 70 with a specified thickness t corresponding to the height h of the rib 62 is formed between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60.

[0071] Furthermore, the bonding method between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60 is not limited to the above method and can be appropriately modified.

[0072] (effect)

[0073] Next, the function of this embodiment will be explained.

[0074] like Figure 1 and Figure 2 As shown, according to the vehicle lower structure of this embodiment, a plurality of battery modules 30 are disposed in the lower part of the vehicle 10.

[0075] like Figure 3As shown, each battery module 30 has multiple battery cells 32 and multiple heat insulation components 36. The multiple battery cells 32 are arranged in the front-rear direction of the vehicle. In addition, heat insulation components 36 are respectively provided between adjacent battery cells 32.

[0076] The cover plate 60 has a plurality of ribs 62. The plurality of ribs 62 protrude from the lower surface 60L of the cover plate 60. The cover plate 60 is joined to the upper surface 30U of the battery module 30 via an adhesive layer 70, with the plurality of ribs 62 respectively supported by a plurality of heat insulation members 36 of the battery module 30.

[0077] Here, when the upper surface 30U of the battery module 30 is bonded to the lower surface 60L of the cover plate 60 via the adhesive layer 70, the heat insulation members 36 between adjacent battery cells 32 support the ribs 62 of the cover plate 60, thereby forming a predetermined gap between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60. Through this gap, the adhesive layer 70 bonding the upper surface 30U of the battery module 30 to the lower surface 60L of the cover plate 60 can be made to have a predetermined layer thickness t.

[0078] Therefore, in this embodiment, the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60 can be bonded together via an adhesive layer 70 with a specified thickness t.

[0079] Furthermore, in this embodiment, compared to the case where the ribs 62 of the cover plate 60 are supported by the upper surface of the battery cell 32, damage to the upper surface of the battery cell 32 can be suppressed.

[0080] Furthermore, the multiple heat insulation elements 36 are formed as sheets sandwiched between adjacent battery cells 32. Multiple ribs 62 of the cover plate 60 are respectively arranged along these heat insulation elements 36.

[0081] Therefore, when the upper surface 30U of the battery module 30 is bonded to the lower surface 60L of the cover plate 60 via the adhesive layer 70, a predetermined gap is formed along the entire length of the rib 62 between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60 by using the heat insulation member 36 to support the rib 62.

[0082] Therefore, the adhesive layer 70 that bonds the upper surface 30U of the battery module 30 to the lower surface 60L of the cover plate 60 can be made to have a specified layer thickness t along the entire length of the rib 62.

[0083] Furthermore, adjacent ribs 62 are supported on the heat insulation member 36 on both sides of the adhesive layer 70. Thus, when the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60 are bonded together via the adhesive layer 70, the ribs 62 disposed on both sides of the adhesive layer 70 restrict the flow of the adhesive layer 70 before curing.

[0084] Therefore, for example, it is possible to suppress leakage of the adhesive layer 70 before curing from between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60.

[0085] In addition, such as Figure 1 As shown, the battery module 30 and the cover plate 60 are housed in the battery housing 40. The battery housing 40 has an upper cover 52 and a lower cover 42 assembled in the vertical direction of the vehicle.

[0086] The upper cover 52 of the battery housing 40 has an upper cover portion 54 that covers a plurality of cover plates 60. The upper cover portion 54 forms the floor of the vehicle compartment 12.

[0087] Therefore, in this embodiment, compared to the case where the floor of the cabin 12 is formed by a floor panel different from the top cover 54, the number of parts can be reduced.

[0088] On the other hand, when the floor of the vehicle compartment 12 is formed by the cover portion 54, the weight of the occupants, etc., is partially transferred to the upper surface 30U of the battery module 30 as a vertical load through the cover portion 54, so the battery module 30 is prone to damage.

[0089] In contrast, in this embodiment, the vertical load acting on the upper cover 54 is transmitted to the heat insulation member 36 via the ribs 62 of the cover plate 60, and is also dispersed and transmitted to the upper surface 30U of the battery module 30 via the cover plate 60 and the adhesive layer 70. Therefore, damage to the battery module 30 can be suppressed.

[0090] Furthermore, the lower surface 54L of the upper cover 54 is bonded to the upper surface 60U of the cover plate 60. That is, the upper surface 30U of the battery module 30 is bonded to the lower surface 54L of the upper cover 54 via the cover plate 60.

[0091] For example, when a collision occurs between a colliding object and a vehicle 10 equipped with a battery housing 40, the battery module 30 within the battery housing 40 may move relative to the colliding object due to inertial forces, thus creating the possibility of interference between the colliding object and the battery module 30.

[0092] In contrast, in this embodiment, as described above, the upper surface 30U of the battery module 30 is bonded to the lower surface 54L of the upper cover portion 54 via the cover plate 60. Therefore, when a collision occurs between a colliding object and the vehicle 10 housing the battery casing 40, the upper cover portion 54, the cover plate 60, and the battery module 30 can easily move together to the side opposite to the colliding object. Thus, interference of the colliding object with the battery module 30 can be suppressed.

[0093] Furthermore, the multiple battery cells 32 are arranged along the length of the battery module 30, i.e., the front-to-back direction of the vehicle. Therefore, in this embodiment, compared to arranging the multiple battery cells 32 along the width of the vehicle, the number of battery cells 32 that can be arranged in a row can be increased.

[0094] In addition, the top cover 52 is made of metal. This allows the thickness of the top cover portion 54 constituting the top cover 52 to be reduced while ensuring the strength of the top cover portion 54.

[0095] On the other hand, the cover plate 60 is made of resin. As a result, the cover plate 60 can be made lightweight, and ribs 62 can be easily formed on the lower surface 60L of the cover plate 60.

[0096] In addition, by making the cover plate 60 a resin material, the adhesion between the cover plate 60 and the battery module 30 and the upper cover 54 can be improved.

[0097] Furthermore, by sandwiching the resin cover plate 60 between the battery module 30 and the upper cover portion 54, the upper cover 52 forming the floor of the vehicle compartment 12 can be insulated from the battery module 30.

[0098] (Variation example)

[0099] Next, variations of the above-described embodiments will be described.

[0100] In the above embodiment, rib 62 is directly supported by the heat insulation member 36. However, a spacer may also be sandwiched between rib 62 and heat insulation member 36, the spacer adjusting the gap between the upper surface 30U of battery module 30 and the lower surface 60L of cover plate 60. That is, in the above embodiment, the concept of rib 62 (protrusion) being supported by heat insulation member 36 includes not only the structure in which rib 62 is directly supported by heat insulation member 36, but also the structure in which rib 62 is indirectly supported via spacer.

[0101] Furthermore, in the above embodiment, the ribs 62 of the cover plate 60 are respectively disposed on both sides of the adhesive layer 70. However, the ribs 62 of the cover plate 60 are not limited to being disposed on both sides of the adhesive layer 70, but may also be disposed on one side of the adhesive layer 70.

[0102] Furthermore, in the above embodiment, the protrusion extending from the lower surface 60L of the cover plate 60 is provided as a rib 62. However, the protrusion is not limited to a rib 62. The protrusion can be any form that ensures a predetermined gap between the upper surface 30U of the battery module 30 and the lower surface 60L of the cover plate 60, and may be, for example, protrusions distributed on the lower surface 60L of the cover plate 60.

[0103] In addition, in the above embodiment, the upper surface 60U of the cover plate 60 is bonded to the lower surface 54L of the upper cover portion 54. However, the upper surface 60U of the cover plate 60 may not be bonded to the lower surface 54L of the upper cover portion 54.

[0104] Furthermore, in the above embodiment, a plurality of ribs 62 are provided on the lower surface 60L of the cover plate 60. However, at least one rib 62 can be provided on the lower surface 60L of the cover plate 60.

[0105] Furthermore, in the above embodiment, the cover plate 60 is made of resin. However, the cover plate 60 is not limited to being made of resin; for example, it may also be made of metal.

[0106] Furthermore, in the above embodiment, the upper cover portion 54 of the upper cover 52 forms the floor of the vehicle compartment 12. However, the floor of the vehicle compartment 12 is not limited to the upper cover portion 54, and may also be formed by a floor panel or the like provided on the upper cover portion 54.

[0107] Furthermore, in the above embodiment, the upper cover 52 is formed as a box shape with an opening on the lower side. However, the upper cover 52 is not limited to a box shape with an opening on the lower side; for example, it may also be formed as a flat plate.

[0108] Furthermore, in the above embodiment, the battery module 30 is configured with its length direction aligned with the vehicle's longitudinal direction. However, the battery module 30 may also be configured with its length direction aligned with the vehicle's width direction. In this case, the plurality of battery cells 32 constituting the battery module 30 are arranged along the vehicle's width direction.

[0109] Furthermore, in the above embodiment, a plurality of battery modules 30 are housed in the battery housing 40. However, at least one battery module 30 can be housed in the battery housing 40.

[0110] In addition, in the above embodiment, the battery module 30 is housed in the battery casing 40. However, the battery casing 40 can be omitted appropriately.

[0111] The above describes one embodiment of the present disclosure, but the present disclosure is not limited to such an embodiment. An embodiment and various modifications can be appropriately combined and used. Of course, it can be implemented in various ways without departing from the spirit of the present disclosure.

Claims

1. A vehicle substructure, The vehicle's lower structure includes: A battery module comprising multiple battery cells and heat insulation components, wherein the multiple battery cells are arranged in a predetermined direction, and the heat insulation components are disposed between adjacent battery cells, and the battery module is configured in the lower part of a vehicle; and The cover plate has a protrusion that extends from the lower surface and is bonded to the upper surface of the battery module via an adhesive layer while the protrusion is supported by the thermal insulation.

2. The vehicle substructure according to claim 1, wherein, The thermal insulation element is formed as a sheet sandwiched between adjacent battery cells. The protrusion is configured as a rib along the insulation element.

3. The vehicle substructure according to claim 2, wherein, The battery module has a plurality of heat insulation components disposed on both sides of the adhesive layer. The cover plate has multiple ribs on both sides of the adhesive layer that are respectively supported by the heat insulation component.

4. The vehicle substructure according to any one of claims 1 to 3, wherein, The vehicle's lower structure includes a battery housing, which has an upper cover that covers the cover plate, and the battery housing houses the battery module and the cover plate. At least a portion of the upper cover forms the floor of the vehicle compartment.

5. The vehicle substructure according to claim 4, wherein, The lower surface of the upper cover is bonded to the upper surface of the cover plate.

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