A lower platform structure and vehicle with integrated side sill and battery pack

Abstract

The present invention provides a lower platform structure in which a side sill and a battery pack are integrated, comprising a side sill assembly, a battery pack, a seat crossbeam and a connecting plate. The side sill assembly comprises an inner plate and an outer plate, wherein the outer plate and the inner plate are arranged opposite to each other in the Y direction and connected to the inner plate; the battery pack comprises a battery module, a frame and an upper cover plate, wherein the frame is located on one side of the battery module in the Y direction, and the frame is arranged side by side with the inner plate in the Z direction and connected to the inner plate; the upper cover plate is connected to the frame, and the seat crossbeam is arranged on the upper cover plate in the Z direction; one end of the connecting plate is fixed to the inner plate, and the other end is fixed to the seat crossbeam. Due to the design that the frame is located on one side of the battery module in the Y direction, and is arranged side by side with the inner plate in the Z direction and connected to the inner plate. Thus, part of the space in the vehicle width direction can be saved; further, the seat crossbeam is arranged on the upper cover plate in the Z direction, that is, the upper cover plate is integrated with the front floor, and about 15 mm of height can be saved in the Z direction, which is conducive to reducing the vehicle height and reducing wind resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle design and manufacturing, and in particular to a lower platform structure and a vehicle in which a side sill and a battery pack are integrated. Background Art

[0002] like Figure 1 The figure shows the existing body-in-white assembly and battery pack system, in which the battery pack is a traditional structure, consisting of an upper cover, a battery pack side beam frame, a battery module, a control element, etc. The body-in-white is also a traditional structure. In the existing structure, in order to reserve space for the installation of the battery pack, there will be a certain gap between the front floor and the upper cover; at the same time, the side sill is arranged on one side of the battery pack, and because of their respective performance requirements, it will take up a large space in the width of the vehicle. Due to the limitations of the existing structure, more battery modules cannot be arranged in the height and width directions of the vehicle, which is not conducive to improving the vehicle's driving range.

[0003] In addition, for vehicles with different shapes on the same platform, if they need to evolve in the width direction, too many parts will be changed, which is not conducive to controlling development costs. At the same time, the body-in-white assembly and the battery pack system are two completely independent systems. Because they need to meet their own functional and performance requirements, both need to be strengthened, resulting in an increase in the weight and cost of the vehicle.

[0004] In view of this, the present application is proposed to at least partially solve the problems existing in the prior art. Summary of the invention

[0005] In the prior art, the battery pack is limited by the lower platform structure in which the existing side sill and the battery pack are integrated. As a result, more battery modules cannot be arranged in the height and width directions of the vehicle, which is not conducive to improving the vehicle's cruising range.

[0006] The present invention provides a lower platform structure in which a side sill and a battery pack are integrated, comprising a side sill assembly, a battery pack, a seat crossbeam and a connecting plate, wherein the side sill assembly comprises an inner plate and an outer plate, wherein the outer plate and the inner plate are arranged opposite to each other in the Y direction and are connected to the inner plate; the battery pack comprises a battery module, a frame and an upper cover plate, wherein the frame is located on one side of the battery module in the Y direction, and is arranged side by side with the inner plate in the Z direction and is connected to the inner plate; the upper cover plate is connected to the frame, and the seat crossbeam is arranged on the upper cover plate in the Z direction; one end of the connecting plate is fixed to the inner plate, and the other end is fixed to the seat crossbeam.

[0007] In the present application, the Y direction refers to the width direction of the vehicle, and the Z direction refers to the height direction of the vehicle. Specifically, the frame of the battery pack is located on one side of the battery module in the Y direction, and is arranged side by side with the inner plate in the Z direction and connected to the inner plate. That is, the threshold assembly and the frame are arranged up and down in the Z direction, and the frame replaces the lower section of the threshold assembly in the original structure, while the threshold assembly is reduced to the upper section in the original structure, thereby saving space in the width direction of the vehicle, maximizing the arrangement of the battery module, and thus improving the vehicle's cruising range. Furthermore, the seat crossbeam is arranged on the upper cover plate in the Z direction, that is, the upper cover plate is integrated with the front floor, and about 15 mm of height can be saved in the Z direction, which is beneficial to lowering the vehicle height and reducing wind resistance. Moreover, the seat crossbeam is connected to the threshold inner plate through a connecting plate, and the threshold assembly can be further fixed.

[0008] Preferably, the side sill assembly also includes a reinforcing plate, which is arranged between the outer plate and the inner plate in the Y direction and connected to the outer plate and the inner plate, and the reinforcing plate and the inner plate enclose a receiving space, and the receiving space is used to receive the frame.

[0009] In the present application, in order to improve the ability of the threshold assembly to resist collision, the threshold assembly is further provided with a reinforcement plate, wherein the reinforcement plate is arranged between the inner plate and the outer plate to strengthen the structure of the threshold assembly. Furthermore, a connection between the reinforcement plate and the outer plate is bent downward along the Z direction, so that the reinforcement plate and the inner plate can enclose a receiving space for arranging a frame.

[0010] Preferably, the reinforcing plate has a first connecting portion, a second connecting portion and a third connecting portion, the first connecting portion is located at one side of the frame in the Y direction and connected to the outer plate, the second connecting portion is located between the outer plate and the inner plate in the Y direction, and the third connecting portion is connected to the first connecting portion and the second connecting portion;

[0011] At least a portion of the third connection portion is overlapped with the inner plate in the Z direction and connected to the frame.

[0012] In the present application, the reinforcing plate includes a first connecting portion, a second connecting portion and a third connecting portion. The first connecting portion is connected to the outer plate and is arranged on one side of the frame in the Y direction to increase the Y-direction protection of the vehicle. Part of the second connecting portion is fixed between the inner plate and the outer plate. The third connecting portion is located between the first connecting portion and the second connecting portion, and is partially overlapped with the inner plate and connected to the top of the frame to increase the connection strength between the door sill assembly and the frame.

[0013] Preferably, the inner plate includes a first connecting section and a second connecting section in the Y direction, the first connecting section is connected to the reinforcing plate and the frame through fasteners, and the second connecting section is bonded to the frame.

[0014] In the present application, the inner plate includes a first connecting section and a second connecting section; wherein the first connecting section overlaps with the reinforcing plate and is connected to the frame through fasteners. The second connecting section can be located on the inner side of the first connecting section in the Y direction, or on both sides of the first connecting section, and is used to apply structural adhesive or the like to bond to the frame to further fix the threshold assembly and the frame. Moreover, the connection method using bolts and glue is also conducive to the disassembly and maintenance of the battery pack. In addition, the structure and connection method of the present application can also provide a better sealing environment for the cab.

[0015] Preferably, the fasteners are arranged to pass through the frame, the inner plate and the reinforcing plate in sequence.

[0016] In the present application, the fastener includes a bushing and a bolt; the bushing can pass through the frame, the inner plate and the reinforcing plate at one time, and is fixed by passing the bolt through the bushing. The bushing is added between the bolt and other components to increase the contact area between the bolt and other components, so that the connection between the door sill assembly and the frame is more stable.

[0017] Preferably, the side sill assembly also includes a surround and a skirt, the surround is arranged on the outside of the outer panel and connected to the outer panel, the skirt, the reinforcement panel and the inner panel together form a receiving space, and the skirt is connected to the surround and the frame.

[0018] In the present application, the threshold assembly also includes a panel and a skirt. The panel is fixed to the outside of the outer panel and a cavity is reserved between the panel and the outer panel, which can improve the anti-collision ability of the threshold assembly. The skirt is located below the reinforcing plate in the Z direction, one end of which is fixed to the reinforcing plate and the other end is fixed to the frame, that is, the frame is located in the receiving space enclosed by the skirt, the reinforcing plate and the inner panel, which can play a certain protective role on the frame. Figure 5 and Figure 6 As shown, the frame can be an integrally formed structure or an assembled structure, and the frame can be adaptively adjusted in shape to adapt to the change in the vehicle width direction, and can achieve a maximum vehicle width change of 30 to 35 mm on one side. Furthermore, the frame preferably adopts an aluminum alloy extrusion structure to reduce the profile die development cost and shorten the production cycle.

[0019] Preferably, the frame includes a first body and a second body, at least a portion of the first body is located between the battery module and the second body in the Y direction, and the first body is connected to the second body and is accommodated in the accommodation space together with the second body.

[0020] In the present application, when the frame adopts an assembled structure, the frame includes a first body and a second body, and at least a portion of the first body is located between the battery module and the second body in the Y direction, so that the shape of the second body can be adjusted to adapt to the evolution in the vehicle width direction.

[0021] Preferably, the first body includes a first main body portion and a first extension portion, the first extension portion protrudes from the first main body portion along the Y direction, the first main body portion is located between the battery module and the second body in the Y direction, and the first extension portion overlaps the second body in the Z direction.

[0022] In the present application, in order to make the structure of the frame of the combined structure more stable, the first body is designed with a first main body and a first extension, the first main body is arranged between the second body and the battery module, and the first extension extends outward along the Y direction so that the first extension overlaps the second body. Further, bushings and bolts can be used to pass through the second body, the first extension, the inner plate and the outer plate in sequence for fixing. This ensures that the connection between the door sill assembly and the frame is more stable.

[0023] Preferably, the second body is formed into a rectangular structure and is located on one side of the first extension portion in the Z direction.

[0024] In a specific solution of the present application, the YZ cross-section of the second body is rectangular, and it can be arranged below the first extension portion. This design is suitable for the evolution of the vehicle width in a narrower direction.

[0025] Preferably, the second body includes a second main body portion and a second extension portion, the second extension portion protrudes from the second main body portion along the Y direction, and the second extension portion is located at one side of the first extension portion in the Z direction.

[0026] Preferably, the first body further includes a first mounting portion, which protrudes from the first extension portion along the Y direction and overlaps the second body portion; the second body further includes a second mounting portion, which protrudes from the second extension portion along the Y direction and overlaps the first body portion.

[0027] In another specific solution of the present application, the second body includes a second main body portion and a second extension portion, the second extension portion protrudes from the second main body portion along the Y direction, and is arranged up and down with the first extension portion in the Z direction, so as to be suitable for the vehicle width to evolve in the wider direction.

[0028] Furthermore, the first body further includes a first mounting portion, which is overlapped on the upper part of the second body, and the second body further includes a second mounting portion, which is overlapped on the lower part of the first body. This is to achieve a bite connection between the first body and the second body, and improve the structural stability of the frame. The first mounting portion and the second mounting portion are preferably connected using FDS flow drill screws to ensure the connection strength.

[0029] In the above two specific schemes, the variation of the vehicle width is achieved by adjusting the shape of the second body, and the shape of the first body does not change, thereby reducing the cost of varying the vehicle width and facilitating the development of the entire vehicle.

[0030] The present application also provides a vehicle that can be configured with any of the above-mentioned side sills and a lower platform structure that integrates a battery pack.

[0031] In summary, the present application provides a lower platform structure in which a side sill and a battery pack are integrated, including a side sill assembly, a battery pack, a seat crossbeam and a connecting plate. The side sill assembly includes an inner plate and an outer plate, and the outer plate and the inner plate are arranged opposite to each other in the Y direction and connected to the inner plate; the battery pack includes a battery module, a frame and an upper cover plate, the frame is located on one side of the battery module in the Y direction, and the frame is arranged side by side with the inner plate in the Z direction and connected to the inner plate; the upper cover plate is connected to the frame, and the seat crossbeam is arranged on the upper cover plate in the Z direction; one end of the connecting plate is fixed to the inner plate and the other end is fixed to the seat crossbeam. Due to the design that the frame is located on one side of the battery module in the Y direction, and is arranged side by side with the inner plate in the Z direction and connected to the inner plate. Thus, space in the vehicle width direction can be saved, the battery module can be arranged to the maximum extent, and the vehicle's driving range can be improved. Furthermore, the seat crossbeam is arranged on the upper cover plate in the Z direction, that is, the upper cover plate is integrated with the front floor, and about 15mm height can be saved in the Z direction, which is conducive to reducing the vehicle height and reducing wind resistance. Moreover, the seat crossbeam is connected to the door sill inner plate through a connecting plate, which can further fix the door sill assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of an existing side sill and a battery pack;

[0034] Figure 2 A schematic diagram of a lower platform structure in which a side sill and a battery pack are integrated according to an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of a lower platform structure in which a side sill and a battery pack are integrated according to an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the assembly of a lower platform structure in which a side sill and a battery pack are integrated according to an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the expansion of the lower platform structure in the width direction in which the side sill and the battery pack are integrated according to an embodiment of the present invention;

[0038] Figure 6 A schematic diagram of the expansion in the width direction of the lower platform structure in which the side sill and the battery pack are integrated according to an embodiment of the present invention.

[0039] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0040] 11. Battery module; 12. Upper cover; 2. Frame; 21. First body; 211. First main body; 212. First extension; 213. First mounting portion; 22. Second body; 221. Second main body; 222. Second extension; 223. Second mounting portion; 3. Inner plate; 31. First connecting section; 32. Second connecting section; 4. Outer plate; 5. Reinforcement plate; 51. First connecting section; 52. Second connecting section; 53. Third connecting section; 6. Enclosure; 7. Skirt; 8. Fastener; 81. Bushing; 82. Bolt; 83. FDS flow drill screw; 91. Seat crossbeam; 92. Connecting plate. DETAILED DESCRIPTION

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Please refer to Figure 2-Figure 6 ,in, Figure 4 The arrow direction in the figure is the installation direction of the components. In order to solve the technical problem that the battery pack is limited by the existing side sill and battery pack arrangement, more battery modules 11 cannot be arranged in the height and width directions of the vehicle, which is not conducive to improving the vehicle's driving range.

[0047] The present application provides a lower platform structure in which a side sill and a battery pack are integrated, including a side sill assembly, a battery pack, a seat crossbeam 91 and a connecting plate, wherein the side sill assembly includes an inner plate 3 and an outer plate 4, wherein the outer plate 4 and the inner plate 3 are arranged opposite to each other in the Y direction and connected to the inner plate 3; the battery pack includes a battery module 11, a frame 2 and an upper cover plate 12, wherein the frame 2 is located on one side of the battery module 11 in the Y direction, and the frame 2 is arranged side by side with the inner plate 3 in the Z direction and connected to the inner plate 3; the upper cover plate 12 is connected to the frame 2, and the seat crossbeam 91 is arranged on the upper cover plate 12 in the Z direction; one end of the connecting plate is fixed to the inner plate 3, and the other end is fixed to the seat crossbeam 91.

[0048] As a further preferred embodiment, based on the above scheme, the specific embodiment of the present invention may also include one or more of the following additions or combinations:

[0049] The side sill assembly also includes a reinforcing plate 5, which is arranged between the outer plate 4 and the inner plate 3 in the Y direction and connected to the outer plate 4 and the inner plate 3, and the reinforcing plate 5 and the inner plate 3 enclose a receiving space, and the receiving space is used to receive the frame 2.

[0050] And / or, the reinforcing plate 5 has a first connecting portion 51, a second connecting portion 52 and a third connecting portion 53, the first connecting portion 51 is located on one side of the frame 2 in the Y direction and is connected to the outer plate 4, the second connecting portion 52 is located between the outer plate 4 and the inner plate 3 in the Y direction, and the third connecting portion 53 is connected to the first connecting portion 51 and the second connecting portion 52; at least a portion of the third connecting portion 53 is overlapped with the inner plate 3 in the Z direction and is connected to the frame 2.

[0051] And / or, the inner plate 3 includes a first connecting section 31 and a second connecting section 32 in the Y direction, the first connecting section 31 is connected to the reinforcing plate 5 and the frame 2 through the fastener 8, and the second connecting section 32 is bonded to the frame 2.

[0052] And / or, the fastener 8 is configured to penetrate the frame 2, the inner plate 3 and the reinforcing plate 5 in sequence.

[0053] And / or, the side sill assembly also includes a surround 6 and a skirt 7, the surround 6 is arranged on the outside of the outer panel 4 and connected to the outer panel 4, the skirt 7 together with the reinforcement plate 5 and the inner panel 3 form a receiving space, and the skirt 7 is connected to the surround 6 and the frame 2.

[0054] And / or, the frame 2 includes a first body 21 and a second body 22, at least a portion of the first body 21 is located between the battery module 11 and the second body 22 in the Y direction, and the first body 21 is connected to the second body 22 and is accommodated in the accommodation space together with the second body 22.

[0055] And / or, the first body 21 includes a first main body portion 211 and a first extension portion 212, the first extension portion 212 protrudes from the first main body portion 211 along the Y direction, the first main body portion 211 is located between the battery module 11 and the second body 22 in the Y direction, and the first extension portion 212 overlaps the second body 22 in the Z direction.

[0056] And / or, the second body 22 is formed into a rectangular structure and is located at one side of the first extension portion 212 in the Z direction.

[0057] And / or, the second body 22 includes a second main body portion 221 and a second extending portion 222 , the second extending portion 222 protrudes from the second main body portion 221 along the Y direction, and the second extending portion 222 is located at one side of the first extending portion 212 in the Z direction.

[0058] And / or, the first body 21 also includes a first mounting portion 213, which protrudes from the first extension portion 212 along the Y direction and overlaps the second main body portion 221; the second body 22 also includes a second mounting portion 223, which protrudes from the second extension portion 222 along the Y direction and overlaps the first main body portion 211.

[0059] In some preferred embodiments, the lower platform structure in which the side sill and the battery pack are integrated includes a side sill assembly and a battery pack, and the side sill assembly includes an inner plate 3, an outer plate 4, a reinforcing plate 5, a surrounding plate 6 and a skirt plate 7, wherein the outer plate 4 and the inner plate 3 are arranged opposite to each other in the Y direction and connected to the inner plate 3. The battery pack includes a battery module 11 and a frame 2, wherein the frame 2 is an integrally formed structure and is located on one side of the battery module 11 in the Y direction. The reinforcing plate 5 is arranged between the outer plate 4 and the inner plate 3 in the Y direction and is connected to the outer plate 4 and the inner plate 3. The surrounding plate 6 is arranged on the outside of the outer plate 4 and is connected to the outer plate 4, and the skirt plate 7, the reinforcing plate 5 and the inner plate 3 together enclose a receiving space, and the skirt plate 7 is connected to the surrounding plate 6 and the frame 2. Thus, the frame 2 is located in the receiving space enclosed by the inner plate 3, the reinforcing plate 5 and the skirt plate 7. The reinforcing plate 5 has a first connecting portion 51, a second connecting portion 52 and a third connecting portion 53. The first connecting portion 51 is located on one side of the frame 2 in the Y direction and is connected to the outer plate 4. The second connecting portion 52 is located between the outer plate 4 and the inner plate 3 in the Y direction. The third connecting portion 53 is connected to the first connecting portion 51 and the second connecting portion 52. At least part of the third connecting portion 53 overlaps with the inner plate 3 in the Z direction and is connected to the frame 2. The inner plate 3 includes a first connecting section 31 and a second connecting section 32 in the Y direction. The second connecting section 32 is coated with structural adhesive and bonded to the frame 2. The bushing 81 and the bolt 82 are sequentially inserted into the frame 2, the first connecting section 31 and the third connecting portion 53 to fix the door sill assembly to the frame 2. The lower platform structure in which the side door sill and the battery pack are integrated also includes a seat crossbeam 91 and a connecting plate. One end of the connecting plate is fixed to the inner plate 3 and the other end is fixed to the seat crossbeam 91. The seat crossbeam 91 is arranged on the upper cover plate 12 in the Z direction.

[0060] In some other preferred embodiments, the lower platform structure in which the side sill and the battery pack are integrated includes a side sill assembly and a battery pack, and the side sill assembly includes an inner plate 3, an outer plate 4, a reinforcing plate 5, a surrounding plate 6 and a skirt plate 7, and the outer plate 4 is arranged opposite to the inner plate 3 in the Y direction and connected to the inner plate 3. The battery pack includes a battery module 11 and a frame 2, wherein the frame 2 is an assembly structure, including a first body 21 and a second body 22, and is located on one side of the battery module 11 in the Y direction. The first body 21 includes a first main body portion 211 and a first extension portion 212, the first extension portion 212 protrudes from the first main body portion 211 along the Y direction, the first main body portion 211 is located between the battery module 11 and the second body 22 in the Y direction, and the first extension portion 212 overlaps the second body 22 in the Z direction. The second body 22 is formed into a rectangular structure and is located on one side of the first extension portion 212 in the Z direction. The second body 22 also includes a second mounting portion 223, which protrudes from the second body 22 in the Y direction and overlaps the first main body portion 211. The second mounting portion 223 is fixed by using an FDS flow drill screw 83. The reinforcing plate 5 is arranged between the outer plate 4 and the inner plate 3 in the Y direction and connected to the outer plate 4 and the inner plate 3. The enclosure 6 is arranged outside the outer plate 4 and connected to the outer plate 4, and the skirt 7, the reinforcing plate 5, and the inner plate 3 together form a receiving space, and the skirt 7 is connected to the enclosure 6 and the second body 22. Thus, the frame 2 is located in the receiving space surrounded by the inner plate 3, the reinforcing plate 5 and the skirt 7. The reinforcing plate 5 has a first connecting portion 51, a second connecting portion 52 and a third connecting portion 53. The first connecting portion 51 is located on one side of the frame 2 in the Y direction and connected to the outer plate 4, the second connecting portion 52 is located between the outer plate 4 and the inner plate 3 in the Y direction, and the third connecting portion 53 is connected to the first connecting portion 51 and the second connecting portion 52; at least part of the third connecting portion 53 is overlapped with the inner plate 3 in the Z direction and connected to the frame 2. The inner panel 3 includes a first connecting section 31 and a second connecting section 32 in the Y direction. The second connecting section 32 is coated with structural adhesive and bonded to the frame 2. The bushing 81 and the bolt 82 are sequentially inserted into the frame 2, the first connecting section 31 and the third connecting portion 53 to fix the door sill assembly to the frame 2. The lower platform structure where the side door sill and the battery pack are integrated also includes a seat crossbeam 91 and a connecting plate. One end of the connecting plate is fixed to the inner panel 3 and the other end is fixed to the seat crossbeam 91. The seat crossbeam 91 is arranged on the upper cover 12 in the Z direction.

[0061] In some more preferred embodiments, in other preferred embodiments, the lower platform structure in which the side sill and the battery pack are integrated includes a side sill assembly and a battery pack, and the side sill assembly includes an inner plate 3, an outer plate 4, a reinforcing plate 5, a surrounding plate 6 and a skirt plate 7, and the outer plate 4 is arranged opposite to the inner plate 3 in the Y direction and connected to the inner plate 3. The battery pack includes a battery module 11 and a frame 2, wherein the frame 2 is an assembly structure, including a first body 21 and a second body 22, and is located on one side of the battery module 11 in the Y direction. The first body 21 includes a first main body portion 211 and a first extension portion 212, the first extension portion 212 protrudes from the first main body portion 211 along the Y direction, the first main body portion 211 is located between the battery module 11 and the second body 22 in the Y direction, and the first extension portion 212 overlaps the second body 22 in the Z direction. The second body 22 includes a second main body portion 221 and a second extension portion 222, the second extension portion 222 protrudes from the second main body portion 221 along the Y direction, and the second extension portion 222 is located on one side of the first extension portion 212 in the Z direction. The first body 21 also includes a first mounting portion 213, the first mounting portion 213 protrudes from the first extension portion 212 along the Y direction and overlaps the second main body portion 221; the second body 22 also includes a second mounting portion 223, the second mounting portion 223 protrudes from the second extension portion 222 along the Y direction and overlaps the first main body portion 211. The first mounting portion 213 and the second mounting portion 223 are fixed by using FDS flow drill screws 83. The reinforcing plate 5 is arranged between the outer plate 4 and the inner plate 3 in the Y direction and connected to the outer plate 4 and the inner plate 3. The enclosure 6 is arranged outside the outer plate 4 and connected to the outer plate 4, and the skirt plate 7, the reinforcing plate 5, and the inner plate 3 together enclose a receiving space, and the skirt plate 7 is connected to the enclosure 6 and the second body 22. Thus, the frame 2 is located in the receiving space surrounded by the inner plate 3, the reinforcing plate 5 and the skirt plate 7. The reinforcing plate 5 has a first connecting portion 51, a second connecting portion 52 and a third connecting portion 53. The first connecting portion 51 is located at one side of the frame 2 in the Y direction and is connected to the outer plate 4. The second connecting portion 52 is located between the outer plate 4 and the inner plate 3 in the Y direction. The third connecting portion 53 is connected to the first connecting portion 51 and the second connecting portion 52. At least part of the third connecting portion 53 overlaps with the inner plate 3 in the Z direction and is connected to the frame 2. The inner plate 3 includes a first connecting section 31 and a second connecting section 32 in the Y direction. The second connecting section 32 is coated with structural adhesive and bonded to the frame 2. The bushing 81 and the bolt 82 are sequentially penetrated through the frame 2, the first connecting section 31 and the third connecting portion 53 to fix the door sill assembly to the frame 2. The battery pack also includes an upper cover plate 12, which is connected to the frame 2; the lower platform structure in which the side sill and the battery pack are integrated also includes a seat beam 91 and a connecting plate, one end of the connecting plate is fixed to the inner plate 3, and the other end is fixed to the seat beam 91, and the seat beam 91 is arranged on the upper cover plate 12 in the Z direction.

[0062] The present application provides a vehicle, which is equipped with any of the above-mentioned side sills and a lower platform structure that integrates a battery pack.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A lower platform structure in which a side sill and a battery pack are integrated, comprising a side sill assembly, a battery pack, a seat crossbeam and a connecting plate, characterized in that: The side sill assembly includes an inner plate and an outer plate, wherein the outer plate is arranged opposite to the inner plate in the Y direction and connected to the inner plate; The battery pack includes a battery module, a frame and an upper cover plate, wherein the frame is located on one side of the battery module in the Y direction, and the frame is arranged side by side with the inner plate in the Z direction and connected to the inner plate; the upper cover plate is connected to the frame, and the seat crossbar is arranged on the upper cover plate in the Z direction; one end of the connecting plate is fixed to the inner plate, and the other end is fixed to the seat crossbar; The side sill assembly further includes a reinforcing plate, which is disposed between the outer plate and the inner plate in the Y direction and connected to the outer plate and the inner plate, and the reinforcing plate and the inner plate enclose a receiving space, and the receiving space is used to receive the frame; The reinforcing plate comprises a first connecting portion, a second connecting portion and a third connecting portion, wherein the first connecting portion is located at one side of the frame in the Y direction and is connected to the outer plate, the second connecting portion is located between the outer plate and the inner plate in the Y direction and respectively connects the outer plate and the inner plate in the Y direction, and the third connecting portion is connected to the first connecting portion and the second connecting portion; the projections of the second connecting portion and the third connecting portion in the Y direction are all covered by the inner plate, and at least a part of the third connecting portion is overlapped with the inner plate in the Z direction and is connected to the frame; The inner plate includes a first connecting section and a second connecting section in the Y direction, the first connecting section is arranged side by side with the frame in the Z direction and is connected to the reinforcing plate and the frame through fasteners, and the second connecting section is bonded to the frame; the fastener is configured to pass through the frame, the first connecting section and the third connecting portion in sequence.

2. The lower platform structure with integrated side sill and battery pack according to claim 1, characterized in that: The side sill assembly also includes a panel and a skirt panel, wherein the panel is arranged on the outside of the outer panel and connected to the outer panel, the skirt panel, the reinforcing panel and the inner panel together form the receiving space, and the skirt panel is connected to the panel and the frame.

3. The lower platform structure with integrated side sill and battery pack according to claim 1, characterized in that: The frame includes a first body and a second body, at least a portion of the first body is located between the battery module and the second body in the Y direction, and the first body is connected to the second body and is accommodated in the accommodation space together with the second body.

4. The lower platform structure with integrated side sill and battery pack according to claim 3, characterized in that: The first body includes a first main body portion and a first extension portion, the first extension portion protrudes from the first main body portion along the Y direction, the first main body portion is located between the battery module and the second body in the Y direction, and the first extension portion overlaps the second body in the Z direction.

5. The lower platform structure with integrated side sill and battery pack according to claim 4, characterized in that: The second body is formed in a rectangular structure and is located at one side of the first extension portion in the Z direction.

6. The lower platform structure with integrated side sill and battery pack according to claim 4, characterized in that: The second body includes a second main body portion and a second extending portion, the second extending portion protrudes from the second main body portion along the Y direction, and the second extending portion is located at one side of the first extending portion in the Z direction.

7. The lower platform structure with integrated side sill and battery pack according to claim 6, characterized in that: The first body further includes a first mounting portion, the first mounting portion protruding from the first extension portion along the Y direction and overlapping the second main body portion; The second body further includes a second mounting portion, which protrudes from the second extending portion along the Y direction and overlaps the first main body portion.

8. A vehicle, characterized in that: A lower platform structure comprising the side sill according to any one of claims 1 to 7 and a battery pack integrated therewith.

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