Underbody, body structure and vehicle

Abstract

The present invention discloses a lower vehicle body, a vehicle body structure and a vehicle. The lower vehicle body includes: a front cabin assembly, a battery assembly and a rear cabin assembly. The front cabin assembly is provided with a first connection portion and a first upper vehicle body connection portion which are spaced apart. The rear cabin assembly is provided with a second connection portion and a second upper vehicle body connection portion which are spaced apart. The front cabin assembly, the rear cabin assembly and the battery assembly are configured to be detachably connected to the battery assembly through the first connection portion and the second connection portion, so that the battery assembly can be independently disassembled away from the upper vehicle body. The vehicle body structure of the present invention can independently disassemble the battery assembly for repair and replacement without disassembling the upper vehicle body, thereby improving the convenience of disassembly and assembly, facilitating the improvement of replacement and repair efficiency, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a lower vehicle body, a vehicle body structure and a vehicle. Background Art

[0002] Battery-body integration technology (CTC technology), which integrates the battery pack and chassis, has become a major technical field for research and development to improve efficiency and reduce costs. However, the integrated design makes the disassembly and assembly of the battery pack complicated, which is not conducive to after-sales maintenance. Summary of the invention

[0003] In view of the above problems, the present application provides a lower body, a body structure and a vehicle to facilitate the maintenance and replacement of the battery assembly.

[0004] In a first aspect, an embodiment of the present invention provides a lower body, which includes: a front cabin assembly, a battery assembly and a rear cabin assembly, the front cabin assembly is provided with a first connection portion and a first upper body connection portion which are spaced apart, the rear cabin assembly is provided with a second connection portion and a second upper body connection portion which are spaced apart, and the front cabin assembly, the rear cabin assembly and the battery assembly are configured to be detachably connected to the battery assembly via the first connection portion and the second connection portion, allowing the battery assembly to be independently disassembled away from the upper body.

[0005] In the technical solution of the embodiment of the present application, the lower body is provided with a front cabin assembly, a battery assembly and a rear cabin assembly, so that the battery assembly is integrated in the lower body, which is beneficial to reducing the number of components and reducing the total weight of the lower body, and the battery assembly is independently detachable relative to the front cabin assembly and the rear cabin assembly, allowing the battery assembly to be independently disassembled in a manner away from the upper body. When the battery assembly needs to be repaired and replaced, the battery assembly can be removed separately for repair and replacement without disassembling the upper body, thereby improving the convenience of disassembly and assembly, which is beneficial to improving the efficiency of replacement and repair and improving user experience.

[0006] In some embodiments, the first connection portion includes a front side fixing portion and a front top fixing portion, and front side fixing portions are provided on both sides of the left and right sides of the front top fixing portion. The front side fixing portion is detachably connected to the battery assembly, and the front top fixing portion is detachably connected to the battery assembly.

[0007] In the above technical solution, by setting the first connecting portion including the front side fixing portion and the front top fixing portion, when the first connecting portion is connected to the battery assembly, it can be detachably connected to the battery assembly through the front side fixing portion and the front top fixing portion respectively, thereby enhancing the connection area between the front cabin assembly and the battery assembly, thereby enhancing the connection stability between the front cabin assembly and the battery assembly.

[0008] In some embodiments, the first part of the front side fixing portion is located on the inner side of the battery assembly; the lower body also includes a first fastener and a second fastener, the first fastener passes through the battery assembly and is fixed to the first part, and the second fastener passes through the first part and is fixed to the battery assembly.

[0009] In the above technical solution, the first part of the front side fixing portion is arranged to be located on the inner side of the battery assembly so that the battery assembly is located on the outer side of the first part, that is, the front side fixing portion and the battery assembly are distributed in the left-right direction of the vehicle. In this way, when the battery assembly needs to be repaired and replaced, after the connection structure of the battery assembly is released, the battery assembly can be directly moved on the outer side of the first part to separate from the first part, so as to avoid interference between the first part and the disassembly movement of the battery assembly.

[0010] Among them, the first fastener passes through the battery assembly and is fixed to the first part, and the second fastener passes through the first part and is fixed to the battery assembly, that is, the first fastener is roughly penetrated from the outside to the inside along the left-right direction to achieve the connection between the first part and the battery assembly, and the second fastener is roughly penetrated from the inside to the outside along the left-right direction to achieve the fixation of the first part and the battery assembly, thereby enhancing the connection stability between the first part and the battery assembly while avoiding the upper body from blocking the fastening position of the first fastener or the second fastener, so as to improve the convenience of disassembly and assembly of the battery assembly and the first part.

[0011] In some embodiments, there are multiple first fasteners, a portion of which are spaced apart along a first direction, and another portion of which are spaced apart along a second direction, and the first direction and the second direction have an angle.

[0012] In the above technical solution, a part of the first fasteners and another part of the first fasteners are arranged at intervals along different directions, so that a plurality of first fasteners can fix the first part and the battery assembly in two directions, thereby enhancing the connection strength between the first part and the battery assembly and further enhancing the connection stability.

[0013] In some embodiments, the second portion of the front side fixing portion is located above the battery assembly; the lower body also includes a third fastener, which passes through the second portion in sequence and is fixed to the battery assembly.

[0014] In the above technical solution, by arranging the second part of the front side fixing portion above the battery assembly, when the battery assembly needs to be repaired and replaced, after the connection structure of the battery assembly is released, the battery assembly can move downward directly under the second part to separate from the second part, so as to avoid interference between the second part and the disassembly movement of the battery assembly, wherein the third fastener is passed through the second part and fixed to the battery assembly, that is, the fixing direction of the third fastener is approximately in the up and down direction, thereby enhancing the connection stability between the second part and the battery assembly in the up and down direction.

[0015] In some embodiments, the front top fixing portion is located above the battery assembly; the lower body further includes a fourth fastener, which passes through the front top fixing portion and is fixed to the battery assembly.

[0016] In the above technical solution, by setting the front top fixing part above the battery assembly, when the battery assembly needs to be repaired and replaced, after the connection structure of the battery assembly is released, the battery assembly can move directly downward under the front top fixing part to separate from the front top fixing part, so as to avoid interference between the front top fixing part and the disassembly movement of the battery assembly, wherein the fourth fastener is passed through the front top fixing part and fixed to the battery assembly, that is, the fixing direction of the fourth fastener is approximately in the up and down direction, thereby enhancing the connection stability between the front top fixing part and the battery assembly in the up and down direction.

[0017] In some embodiments, the second connection portion includes a rear side fixing portion, the rear side fixing portion includes a third part and a fourth part, the third part is located above the fourth part, and the third part and the fourth part are both located above the battery assembly; the lower body also includes a plurality of fifth fasteners, a portion of the fifth fasteners pass through the third part to be fixed to the battery assembly, and another portion of the fifth fasteners pass through the fourth part to be fixed to the battery assembly.

[0018] In the above technical solution, the third part and the fourth part are both located above the battery assembly, so that when the battery assembly needs to be repaired and replaced, after the connection structure of the battery assembly is released, the battery assembly can move directly downward under the third part and the fourth part to separate from the third part and the fourth part, so as to avoid interference between the third part and the fourth part and the disassembly movement of the battery assembly.

[0019] Among them, a part of the fifth fasteners and another part of the fifth fasteners are respectively fixed to the battery assembly through the third part and the fourth part, and the third part is located above the fourth part, so that multiple fifth fasteners can fix the rear side fixing part and the battery assembly at two heights, thereby enhancing the connection strength between the rear side fixing part and the battery assembly, and then enhancing its connection stability.

[0020] In some embodiments, the rear side fixing portion further includes a fifth portion, which is located on the inner side of the battery assembly; the lower body further includes a sixth fastener, which passes through the fifth portion and is fixed to the battery assembly.

[0021] In the above technical solution, the fifth part is arranged to be located on the inner side of the battery assembly so that the battery assembly is located on the outer side of the fifth part, that is, the fifth part and the battery assembly are distributed in the left-right direction of the vehicle. In this way, when the battery assembly needs to be repaired and replaced, the battery assembly can be directly moved on the outer side of the fifth part to separate from the fifth part after the connection structure of the battery assembly is released, so as to avoid interference between the disassembly movement of the fifth part and the battery assembly, wherein the sixth fastener passes through the fifth part and is fixed to the battery assembly, that is, the sixth fastener is roughly penetrated from the inside to the outside along the left-right direction to achieve the fixation of the fifth part and the battery assembly, thereby enhancing the connection stability between the fifth part and the battery assembly in the left-right direction while avoiding the upper body from blocking the fastening position of the sixth fastener, so as to improve the convenience of disassembly and assembly of the battery assembly and the fifth part.

[0022] In some embodiments, the second connection portion also includes a rear top fixing portion, and rear side fixing portions are provided on both sides of the rear top fixing portion; the rear top fixing portion is located above the battery assembly; the lower body also includes a seventh fastener, which passes through the rear top fixing portion and is fixed to the battery assembly.

[0023] In the above technical solution, the rear top fixing portion is arranged above the battery assembly so that the battery assembly is located below the rear top fixing portion, that is, the rear top fixing portion and the battery assembly are distributed in the up and down directions of the vehicle. In this way, when the battery assembly needs to be repaired and replaced, after the connection structure of the battery assembly is released, the battery assembly can be directly moved downward below the rear top fixing portion to separate from the rear top fixing portion, so as to avoid interference between the disassembly movement of the rear top fixing portion and the battery assembly, wherein the seventh fastener passes through the rear top fixing portion and is fixed to the battery assembly, that is, the seventh fastener is roughly penetrated from top to bottom along the up and down direction to achieve fixation of the rear top fixing portion and the battery assembly, thereby enhancing the connection stability between the rear top fixing portion and the battery assembly in the up and down direction while avoiding obstruction of the fastening position of the seventh fastener by the upper vehicle body, so as to improve the convenience of disassembly and assembly of the battery assembly and the rear top fixing portion.

[0024] In some embodiments, the lower body further includes a first seal and a second seal, the first seal seals the gap between the front compartment assembly and the battery assembly, and the second seal seals the gap between the rear compartment assembly and the battery assembly.

[0025] In the above technical solution, the provision of the first seal can improve the sealing between the front cabin assembly and the battery assembly, and the provision of the second seal can improve the sealing between the rear cabin assembly and the battery assembly.

[0026] In some embodiments, the first seal and / or the second seal is an adhesive member, and the adhesive member is used to cooperate with the battery assembly.

[0027] In the above technical solution, the first seal is an adhesive component, which can ensure the sealing effect of the connection between the front cabin assembly and the battery assembly while enhancing the connection reliability between the front cabin assembly and the battery assembly, and / or the second seal is an adhesive component, which can ensure the sealing effect of the connection between the rear cabin assembly and the battery assembly while enhancing the connection reliability between the rear cabin assembly and the battery assembly, and the structure is simpler, which is conducive to reducing costs.

[0028] In some embodiments, the battery assembly includes a box body and a battery cell disposed in the box body, the box body includes a door sill beam, and the front cabin assembly, the rear cabin assembly and the upper body are respectively detachably connected to the box body.

[0029] In the above technical solution, the box can provide shielding and protection for the battery cells, and the box includes a door sill beam, and the front cabin assembly, the rear cabin assembly and the upper body are respectively detachably connected to the box, so that the box is integrated with the front cabin assembly and the rear cabin assembly as the vehicle body floor to form a lower body, thereby realizing the design of the box integrated in the lower body.

[0030] In a second aspect, the present application provides a vehicle body structure, including an upper vehicle body and a lower vehicle body, wherein the lower vehicle body is the lower vehicle body in any of the above-mentioned embodiments, and the upper vehicle body avoids a first connection portion and a second connection portion.

[0031] In some embodiments, the vehicle body structure further includes a third seal that seals a gap between the battery assembly and the upper vehicle body.

[0032] In the above technical solution, by providing the third seal, the sealing performance of the connection between the upper vehicle body and the battery assembly can be improved.

[0033] In some embodiments, a portion of the battery assembly is detachably connected to the upper vehicle body in the left-right direction.

[0034] In the above technical solution, a part of the battery assembly is detachably connected to the upper body in the left-right direction, so that when loading and unloading the battery assembly, the upper body can be prevented from obstructing the disassembly process of the battery assembly and interference with the front cabin assembly or the rear cabin assembly can be avoided, thereby reducing the difficulty of loading and unloading the battery assembly.

[0035] In some embodiments, in the left-right direction, a portion of the battery assembly is detachably connected to the front compartment assembly, and a portion of the battery assembly is detachably connected to the rear compartment assembly.

[0036] In the above technical solution, a part of the battery assembly is detachably connected to the front compartment assembly in the left-right direction and a part of the battery assembly is detachably connected to the rear compartment assembly. Therefore, when loading and unloading the battery assembly, it is possible to avoid the front compartment assembly and the rear compartment assembly obstructing the disassembly process of the battery assembly and avoid interference with the upper body, thereby reducing the difficulty of loading and unloading the battery assembly.

[0037] In a third aspect, the present application provides a vehicle comprising a vehicle body structure in any one of the above-mentioned embodiments.

[0038] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0040] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0041] Figure 2 A schematic diagram of a vehicle body structure according to some embodiments of the present application;

[0042] Figure 3 It is a schematic diagram of the exploded structure of the vehicle body structure of some embodiments of the present application;

[0043] Figure 4 This is a schematic diagram of the exploded structure of the lower vehicle body of some embodiments of the present application;

[0044] Figure 5 for Figure 2 The enlarged view of point A in the middle;

[0045] Figure 6 for Figure 2 The enlarged view of point B in the middle;

[0046] Figure 7 for Figure 3 Enlarged view of point E in the middle;

[0047] Figure 8 for Figure 2 Enlarged view of point C in the middle;

[0048] Fig. 9 for Figure 2 Enlarged view of point D in the middle.

[0049] Reference numerals:

[0050] Vehicle 1000; front-rear direction X of the vehicle; left-right direction Y of the vehicle; up-down direction Z of the vehicle;

[0051] Vehicle body structure 100; controller 200; motor 300;

[0052] Upper body 10; lower body 20; front cabin assembly 21; first connecting portion 211; front side fixing portion 2111; first part 21111; first direction L1; second direction L2; second part 21112; front top fixing portion 2112; battery assembly 22; box body 221; door sill beam 222; rear cabin assembly 23; second connecting portion 231; rear side fixing portion 2311; third part 23111; fourth part 23112; fifth part 23113; rear top fixing portion 2312; first fastener 31; second fastener 32; third fastener 33; fourth fastener 34; fifth fastener 35; sixth fastener 36; seventh fastener 37; first seal 41; second seal 42; third seal 43. DETAILED DESCRIPTION

[0053] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application 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 a limitation on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] At present, from the perspective of market development, vehicles are increasingly being used. Vehicles include body structures, and as the application scope of vehicles continues to expand, the market demand for body structures is also growing.

[0062] In the related art, the body structure of a vehicle includes multiple mounting parts such as the body, front and rear panels, front and rear doors, and a battery pack. During actual assembly, multiple mounting parts need to be installed on the body according to their structural layout. This will result in disadvantages such as great difficulty in assembly and low production efficiency.

[0063] In order to alleviate the problems of difficult assembly and low production efficiency, the vehicle body can be divided into an upper body and a lower body, and then the battery pack can be integrated into the lower body, and then the lower body and the upper body can be connected. However, after a problem occurs with the battery pack, when disassembling the battery pack in the complete vehicle state, the upper body and the lower body need to be disassembled, and then the front and rear ends of the battery pack need to be disassembled. The operation is complicated, the disassembly time is long, and the maintenance cost is high.

[0064] Based on the above considerations, in order to solve the problems of complex battery pack disassembly and assembly, high disassembly man-hours, high maintenance costs and inconvenience for after-sales maintenance, in the present application, a lower body is designed. By setting the lower body to include a front cabin assembly, a battery assembly and a rear cabin assembly, the battery assembly is integrated in the lower body, which is beneficial to reducing the number of parts and reducing the total weight of the vehicle body structure. In addition, by setting the battery assembly to be independently detachable relative to the front cabin assembly and the rear cabin assembly, the battery assembly can be independently disassembled away from the upper body. When the battery assembly needs to be repaired and replaced, the battery assembly can be disassembled separately for repair and replacement without disassembling the upper body and the front cabin assembly and the rear cabin assembly, thereby improving the convenience of disassembly and assembly, and facilitating improving the efficiency of replacement and maintenance and improving user experience.

[0065] Against the backdrop of increasing demand for vehicles, the battery assembly of the lower body of the present application is more convenient to disassemble and assemble, which helps improve replacement and maintenance efficiency and enhances user experience.

[0066] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an embodiment of the present application.

[0067] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an augmented-program vehicle, etc. The vehicle 1000 includes a body structure 100, and the body structure 100 includes an upper body 10 and a lower body 20, and the lower body 20 includes a front cabin assembly 21, a battery assembly 22 and a rear cabin assembly 23, the front cabin assembly 21 is used to transfer the front collision load, and the rear cabin assembly 23 has an important function of placing a spare tire and reducing the damage to the fuel tank and reducing the injury to passengers by deforming itself during a rear collision.

[0068] The battery assembly 22 refers to a physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery assembly 22 mentioned in the present invention may include a battery module or a battery pack, etc. Some battery assemblies 22 may include a box 221 for encapsulating one or more battery cells or battery modules. The box 221 can reduce or prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. The battery cells can be used to power the vehicle 1000. For example, the battery cells can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery cells to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.

[0069] The structure of the box 221 can be flexibly set. For example, in some embodiments, the box 221 can include a first shell and a second shell, and the first shell and the second shell are buckled to form a sealed box 221. In other embodiments, the box 221 includes a frame, the frame has an upper end opening and a lower end opening, and the frame cooperates with other structures of the vehicle 1000 to form a sealed structure. In some other embodiments, the box 221 includes one of an upper cover and a lower cover and a frame, the upper cover is used to cover the upper end opening of the frame, and the lower cover is used to cover the lower end opening of the frame, so that the box 221 has an end opening, and the end opening can cooperate with other structures of the vehicle 1000 to form a sealed structure. All of this is within the scope of protection of the present invention.

[0070] The battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present invention. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., which is not limited in the embodiments of the present invention. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which is not limited in the embodiments of the present invention.

[0071] For example, a battery cell may include a housing, an electrode assembly, and an electrolyte, wherein the housing is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet.

[0072] According to some embodiments of the present application, a lower vehicle body 20 is provided. Figure 2-Figure 4 , Figure 2 is a schematic diagram of a vehicle body structure 100 according to an embodiment of the present application. Figure 3 Schematic diagram of the exploded structure of the vehicle body structure 100 according to some embodiments of the present application. Figure 4 It is a schematic diagram of the exploded structure of the lower vehicle body 20 according to some embodiments of the present application.

[0073] Among them, the directions such as up, down, front, back, left, and right are all based on the direction of the vehicle 1000, that is, the direction from the front to the rear of the vehicle is the direction from front to back, the direction from the roof to the bottom of the vehicle is the direction from top to bottom, and the main driver's seat and the co-driver's seat are arranged along the left and right direction. For example, the front and back direction (i.e., the length direction) of the vehicle 1000 is the X direction, the left and right direction (i.e., the width direction) of the vehicle 1000 is the Y direction, and the up and down direction (i.e., the height direction) of the vehicle 1000 is the Z direction.

[0074] Please refer to Figure 2-Figure 4 The lower body 20 includes: a front cabin assembly 21, a battery assembly 22 and a rear cabin assembly 23. The front cabin assembly 21 is provided with a first connection portion 211 and a first upper body connection portion 212 which are spaced apart. The rear cabin assembly 23 is provided with a second connection portion 231 and a second upper body connection portion 232 which are spaced apart. The front cabin assembly 21, the rear cabin assembly 23 and the battery assembly 22 are configured to be detachably connected to the battery assembly 22 via the first connection portion 211 and the second connection portion 231, allowing the battery assembly 22 to be independently disassembled away from the upper body 10.

[0075] “A manner of moving away from the upper vehicle body 10 ” includes but is not limited to: in the up-down direction, the battery assembly 22 moves downward to move away from the upper vehicle body 10 , or in the left-right direction, the battery assembly 22 moves left or right to move away from the upper vehicle body 10 .

[0076] It should be noted that the first upper body connection portion 212 and the second upper body connection portion 232 are both suitable for detachably connecting the upper body 10 .

[0077] “The first connection portion 211 and the first upper body connection portion 212 that are spaced apart” means that when the first connection portion 211 and the first upper body connection portion 212 are connected to the battery assembly 22 and the upper body 10 respectively, the connection method of the first connection portion 211 and the connection method of the first upper body connection portion 212 do not interfere with each other, wherein the first connection portion 211 and the first upper body connection portion 212 can be constructed as different sheet metal parts, or the first connection portion 211 and the first upper body connection portion 212 can be constructed as different areas of the same sheet metal part, which is not limited here.

[0078] “The second connection portion 231 and the second upper body connection portion 232 are spaced apart” means that when the second connection portion 231 and the second upper body connection portion 232 are connected to the battery assembly 22 and the upper body 10 respectively, the connection mode of the second connection portion 231 and the connection mode of the second upper body connection portion 232 do not interfere with each other, wherein the second connection portion 231 and the second upper body connection portion 232 can be constructed as different sheet metal parts, or the second connection portion 231 and the second upper body connection portion 232 can be constructed as different areas of the same sheet metal part, which is not limited here.

[0079] The detachable matching modes of the detachable connection between the first connection part 211 of the front compartment assembly 21 and the battery assembly 22 include but are not limited to clearance matching, abutment, clamping, bonding, bolting, etc. Similarly, the detachable matching modes of the second connection part 231 of the rear compartment assembly 23 and the battery assembly 22 and the battery assembly 22 and the upper vehicle body 10 include but are not limited to clearance matching, abutment, clamping, bonding, bolting, etc.

[0080] The connection method between the first upper body connection part 212 and the upper body 10 includes but is not limited to welding, bolt connection, clamping, bonding, etc. Similarly, the connection method between the second upper body connection part 232 and the upper body 10 includes but is not limited to welding, bolt connection, clamping, bonding, etc.

[0081] For example, the first upper body connection portion 212 and the second upper body connection portion 232 are both connected to the upper body 10 by bolts, wherein a portion of the bolts extend from the inner side of the upper body 10 toward the outside of the vehicle to connect the first upper body connection portion 212 and / or the second upper body connection portion 232 to the upper body 10, and another portion of the bolts extend from the outside of the vehicle toward the inner side of the upper body 10 to connect the first upper body connection portion 212 and / or the second upper body connection portion 232 to the upper body 10.

[0082] For example, the first connection portion 211 and the second connection portion 231 are both connected to the battery assembly 22 through corresponding bolts, and the bolts at the first connection portion 211 do not interfere with the bolts at the first upper body connection portion 212, and the bolts at the second connection portion 231 do not interfere with the bolts at the second upper body connection portion 232. In this way, when disassembling the battery assembly 22, it is easier to disassemble the bolts at the first connection portion 211 and the bolts at the second connection portion 231, so that the battery assembly 22 can be disassembled independently.

[0083] The lower body 20 may be provided with a shielding structure to shield a portion of the above-mentioned bolts. The shielding structure may be other interior structures such as a car carpet or a floor mat to shield a portion of the above-mentioned bolts to avoid interference with other structures and make them not directly visible, thereby helping to enhance the flatness of the inner side of the lower body 20.

[0084] Among them, the upper body 10 avoids the first connection part 211 and the second connection part 231, that is, the first connection part 211 and the second connection part 231 are exposed on the upper body 10. For example, in the distribution direction of the upper body 10 and the lower body 20, the projection of the first connection part 211 does not overlap with the projection of the upper body 10, and in the distribution direction of the upper body 10 and the lower body 20, the projection of the second connection part 231 does not overlap with the projection of the upper body 10, that is, the upper body 10 will not block the first connection part 211 and the second connection part 231.

[0085] Therefore, when the battery assembly 22 needs to be repaired and replaced, since the upper body 10 will not block the first connection portion 211 and the second connection portion 231, the staff can disassemble the battery assembly 22 separately for repair and replacement away from the upper body 10 without disassembling the upper body 10 and the front cabin assembly 21 and the rear cabin assembly 23, thereby improving the convenience of disassembly and assembly, which is beneficial to improving the efficiency of replacement and maintenance and improving the user experience.

[0086] For example, when the battery assembly 22 needs to be disassembled, only the battery assembly 22 can be removed while the front compartment assembly 21 and the rear compartment assembly 23 are kept connected to the upper body 10. For example, in an embodiment where the battery assembly 22 is directly connected to the front compartment assembly 21 and the rear compartment assembly 23 and abuts against the upper body 10, the connection between the battery assembly 22 and the front compartment assembly 21 and the connection with the rear compartment assembly 23 can be released while the front compartment assembly 21 and the rear compartment assembly are respectively connected to the upper body 10, so as to facilitate the separation of the battery assembly 22 from the upper body 10. For another example, in an embodiment where the battery assembly 22 is connected to the upper body 10 by fasteners, the connection between the battery assembly 22 and the upper body 10 can be released without affecting the connection between the front compartment assembly 21 and the rear compartment assembly 23 and the upper body 10, so as to facilitate the separation of the battery assembly 22 from the upper body 10.

[0087] Of course, in the embodiment where the front cabin assembly 21 is detachable, when the front cabin assembly 21 is disassembled, the front cabin assembly 21 can be detachable alone, or it can be detached together with the battery assembly 22, or it can be detached together with the battery assembly 22 and the rear cabin assembly 23; in the embodiment where the rear cabin assembly 23 is detachable, when the rear cabin assembly 23 is disassembled, the rear cabin assembly 23 can be detachable alone, or it can be detached together with the battery assembly 22, or it can be detached together with the battery assembly 22 and the front cabin assembly 21, all of which are within the protection scope of the present invention.

[0088] According to the lower body 20 of the embodiment of the present invention, by setting the lower body 20 to include a front cabin assembly 21, a battery assembly 22 and a rear cabin assembly 23, the battery assembly 22 is integrated in the lower body 20, which is beneficial to reducing the number of components and reducing the total weight of the lower body 20, and by setting the battery assembly 22 to be independently detachable relative to the front cabin assembly 21 and the rear cabin assembly 23, the battery assembly 22 can be independently disassembled in a manner away from the upper body 10. When the battery assembly 22 needs to be repaired and replaced, since the upper body 10 will not block the first connection portion 211 and the second connection portion 231, the staff can separately disassemble the battery assembly 22 for repair and replacement without disassembling the upper body 10, thereby improving the convenience of disassembly and assembly, which is beneficial to improving the replacement and repair efficiency and improving the user experience.

[0089] In some embodiments, please refer to Figure 4 The first connection portion 211 includes a front side fixing portion 2111 and a front top fixing portion 2112. Front side fixing portions 2111 are provided on both sides of the left and right sides of the front top fixing portion 2112. The front side fixing portion 2111 is detachably connected to the battery assembly 22, and the front top fixing portion 2112 is detachably connected to the battery assembly 22.

[0090] Therefore, by setting the first connection part 211 to include the front side fixing part 2111 and the front top fixing part 2112, when the first connection part 211 is connected to the battery assembly 22, it can be detachably connected to the battery assembly 22 through the front side fixing part 2111 and the front top fixing part 2112 respectively, thereby enhancing the connection area between the front cabin assembly 21 and the battery assembly 22, so as to enhance the connection stability between the front cabin assembly 21 and the battery assembly 22.

[0091] In some embodiments, please refer to Figure 5 and Figure 6 , Figure 5 for Figure 2 The enlarged view of point A in the middle. Figure 6 for Figure 2 The first part 21111 of the front side fixing part 2111 is located on the inner side of the battery assembly 22; the lower body 20 also includes a first fastener 31 and a second fastener 32, the first fastener 31 passes through the battery assembly 22 and is fixed to the first part 21111, and the second fastener 32 passes through the first part 21111 and is fixed to the battery assembly 22.

[0092] “Inside” refers to a side closer to the inside of the vehicle in the left-right direction, and conversely, “outside” refers to a side closer to the outside of the vehicle in the left-right direction.

[0093] Therefore, by setting the first part 21111 of the front side fixing portion 2111 to be located on the inner side of the battery assembly 22, the battery assembly 22 is located on the outer side of the first part 21111, that is, the front side fixing portion 2111 and the battery assembly 22 are distributed in the left and right directions of the vehicle 1000. In this way, when the battery assembly 22 needs to be repaired and replaced, after the connection structure of the battery assembly 22 is released, the battery assembly 22 can be directly moved on the outer side of the first part 21111 to separate from the first part 21111, so as to avoid interference between the disassembly movement of the first part 21111 and the battery assembly 22.

[0094] Among them, the first fastener 31 passes through the battery assembly 22 and is fixed to the first part 21111, and the second fastener 32 passes through the first part 21111 and is fixed to the battery assembly 22, that is, the first fastener 31 is roughly penetrated from the outside to the inside along the left-right direction to achieve the connection between the first part 21111 and the battery assembly 22, and the second fastener 32 is roughly penetrated from the inside to the outside along the left-right direction to achieve the fixation of the first part 21111 and the battery assembly 22, thereby enhancing the connection stability between the first part 21111 and the battery assembly 22 while avoiding the upper body from blocking the fastening position of the first fastener 31 or the second fastener 32, so as to improve the convenience of disassembly and assembly of the battery assembly 22 and the first part 21111.

[0095] It should be noted that the first fastener 31 and the second fastener 32 can both be constructed as bolts, or connecting columns or other structures, which are not limited here. When the first fastener 31 and the second fastener 32 are constructed as bolts, nuts are correspondingly embedded on the first part 21111 or the battery assembly 22.

[0096] In some embodiments, please refer to Figure 5 and Figure 7 , Figure 7 for Figure 3 The enlarged view of point E in the middle. There are multiple first fasteners 31, some of which are arranged at intervals along the first direction L1, and another part of the first fasteners 31 are arranged at intervals along the second direction L2, and the first direction and the second direction have an angle.

[0097] For example, the first direction is the front-to-rear direction of the vehicle, i.e., the X direction, and the second direction is the height direction of the vehicle, i.e., the Z direction. In this way, a part of the first fasteners 31 and another part of the first fasteners 31 are spaced apart along different directions, so that a plurality of first fasteners 31 can fix the first part 21111 and the battery assembly 22 in two directions (X direction and Z direction), thereby enhancing the connection strength between the first part 21111 and the battery assembly 22 in the X direction and the Z direction, and further enhancing the connection stability.

[0098] In some embodiments, please refer to Figure 5 The second part 21112 of the front side fixing portion 2111 is located above the battery assembly 22; the lower body 20 also includes a third fastener 33, which passes through the second part 21112 in sequence and is fixed to the battery assembly 22.

[0099] Thus, by setting the second part 21112 of the front side fixing portion 2111 above the battery assembly 22, when the battery assembly 22 needs to be repaired and replaced, after the connection structure of the battery assembly 22 is released, the battery assembly 22 can move directly downward under the second part 21112 to separate from the second part 21112, so as to avoid interference between the second part 21112 and the disassembly movement of the battery assembly 22, wherein the third fastener 33 is penetrated through the second part 21112 and fixed to the battery assembly 22, that is, the fixing direction of the third fastener 33 is approximately in the up and down direction, thereby enhancing the connection stability between the second part 21112 and the battery assembly 22 in the up and down direction (that is, the Z direction).

[0100] It should be noted that the third fastener 33 can be constructed as a bolt, or a connecting column or other structure, which is not limited here. When the third fastener 33 is constructed as a bolt, a nut is correspondingly embedded on the battery assembly 22.

[0101] In some embodiments, please refer to Figure 6 , the front top fixing portion 2112 is located above the battery assembly 22 ; the lower body 20 also includes a fourth fastener 34 , which passes through the front top fixing portion 2112 and is fixed to the battery assembly 22 .

[0102] Thus, by setting the front top fixing portion 2112 above the battery assembly 22, when the battery assembly 22 needs to be repaired and replaced, after the connection structure of the battery assembly 22 is released, the battery assembly 22 can move directly downward under the front top fixing portion 2112 to separate from the front top fixing portion 2112, so as to avoid interference between the front top fixing portion 2112 and the disassembly movement of the battery assembly 22, wherein the fourth fastener 34 is penetrated through the front top fixing portion 2112 and fixed to the battery assembly 22, that is, the fixing direction of the fourth fastener 34 is approximately in the up and down direction, thereby enhancing the connection stability between the front top fixing portion 2112 and the battery assembly 22 in the up and down direction.

[0103] For example, the fourth fastener 34 may be configured as a bolt, or a connecting column, or other structures, which are not limited herein. When the fourth fastener 34 is configured as a bolt, a nut is correspondingly embedded on the battery assembly 22 .

[0104] In some embodiments, the second connection portion 231 includes a rear side fixing portion 2311, see Figure 8 , Figure 8 for Figure 2 Enlarged view of point C in the middle.

[0105] The rear side fixing portion 2311 includes a third part 23111 and a fourth part 23112, the third part 23111 is located above the fourth part 23112, and the third part 23111 and the fourth part 23112 are both located above the battery assembly 22; the lower body 20 also includes a plurality of fifth fasteners 35, a part of the fifth fasteners 35 passes through the third part 23111 and is fixed to the battery assembly 22, and another part of the fifth fasteners 35 passes through the fourth part 23112 and is fixed to the battery assembly 22.

[0106] Therefore, by arranging the third part 23111 and the fourth part 23112 to be located above the battery assembly 22, when the battery assembly 22 needs to be repaired and replaced, after the connection structure of the battery assembly 22 is released, the battery assembly 22 can move directly downward under the third part 23111 and the fourth part 23112 to separate from the third part 23111 and the fourth part 23112, so as to avoid interference between the third part 23111 and the fourth part 23112 and the disassembly movement of the battery assembly 22.

[0107] Please refer to Figure 8 A part of the fifth fastener 35 and another part of the fifth fastener 35 are respectively fixed to the battery assembly 22 through the third part 23111 and the fourth part 23112, and the third part 23111 is located above the fourth part 23112, so that multiple fifth fasteners 35 can fix the rear side fixing part 2311 and the battery assembly 22 at two heights, thereby enhancing the connection strength between the rear side fixing part 2311 and the battery assembly 22, and further enhancing its connection stability.

[0108] For example, the fifth fastener 35 may be constructed as a bolt, or a connecting column or other structure, which is not limited here. When the fifth fastener 35 is constructed as a bolt, a nut is correspondingly embedded on the battery assembly 22.

[0109] In some embodiments, please refer to Fig. 9 , Fig. 9 for Figure 2 Magnified view of point D in .

[0110] The rear side fixing portion 2311 also includes a fifth portion 23113 , which is located on the inner side of the battery assembly 22 ; the lower body 20 also includes a sixth fastener 36 , which passes through the fifth portion 23113 and is fixed to the battery assembly 22 .

[0111] Therefore, by setting the fifth part 23113 to be located on the inner side of the battery assembly 22, so that the battery assembly 22 is located on the outer side of the fifth part 23113, that is, the fifth part 23113 and the battery assembly 22 are distributed in the left and right directions of the vehicle 1000, when the battery assembly 22 needs to be repaired and replaced, after the connection structure of the battery assembly 22 is released, the battery assembly 22 can be directly moved on the outer side of the fifth part 23113 to separate from the fifth part 23113, so as to avoid interference between the disassembly movement of the fifth part 23113 and the battery assembly 22.

[0112] Among them, the sixth fastener 36 passes through the fifth part 23113 and is fixed to the battery assembly 22, that is, the sixth fastener 36 is roughly penetrated from the inside to the outside along the left-right direction to achieve the fixation of the fifth part 23113 and the battery assembly 22, thereby enhancing the connection stability between the fifth part 23113 and the battery assembly 22 in the left-right direction while avoiding the upper body from blocking the fastening position of the sixth fastener 36, so as to improve the convenience of disassembly and assembly of the battery assembly 22 and the fifth part 23113.

[0113] For example, the sixth fastener 36 may be configured as a bolt, or a connecting column, or other structures, which are not limited herein. When the sixth fastener 36 is configured as a bolt, a nut is correspondingly embedded on the battery assembly 22 .

[0114] In some embodiments, please refer to Fig. 9 The second connection portion 231 also includes a rear top fixing portion 2312, and rear side fixing portions 2311 are provided on both sides of the rear top fixing portion 2312; the rear top fixing portion 2312 is located above the battery assembly 22; the lower body 20 also includes a seventh fastener 37, and the seventh fastener 37 passes through the rear top fixing portion 2312 and is fixed to the battery assembly 22.

[0115] Therefore, by setting the rear top fixing portion 2312 above the battery assembly 22, so that the battery assembly 22 is located below the rear top fixing portion 2312, that is, the rear top fixing portion 2312 and the battery assembly 22 are distributed in the up and down directions of the vehicle 1000, so that when the battery assembly 22 needs to be repaired and replaced, after the connection structure of the battery assembly 22 is released, the battery assembly 22 can move directly downward below the rear top fixing portion 2312 to separate from the rear top fixing portion 2312, so as to avoid interference between the rear top fixing portion 2312 and the disassembly movement of the battery assembly 22.

[0116] Among them, the seventh fastener 37 passes through the rear top fixing part 2312 and is fixed to the battery assembly 22, that is, the seventh fastener 37 is roughly passed from top to bottom along the up and down direction to achieve the fixation of the rear top fixing part 2312 and the battery assembly 22, thereby enhancing the connection stability between the rear top fixing part 2312 and the battery assembly 22 in the up and down direction while avoiding the upper body from blocking the fastening position of the seventh fastener 37, so as to improve the convenience of disassembly and assembly of the battery assembly 22 and the rear top fixing part 2312.

[0117] For example, the seventh fastener 37 can be constructed as a bolt, or a connecting column or other structure, which is not limited here. When the seventh fastener 37 is constructed as a bolt, a nut is correspondingly embedded on the battery assembly 22.

[0118] In some embodiments, please refer to Figure 4 The lower body 20 further includes a first seal 41 and a second seal 42 . The first seal 41 seals the gap between the front compartment assembly 21 and the battery assembly 22 , and the second seal 42 seals the gap between the rear compartment assembly 23 and the battery assembly 22 .

[0119] Therefore, the provision of the first seal 41 can improve the sealing between the front compartment assembly 21 and the battery assembly 22 , and the provision of the second seal 42 can improve the sealing between the rear compartment assembly 23 and the battery assembly 22 .

[0120] The specific structures of the first sealing member 41 and the second sealing member 42 can be flexibly set, and at least one of them can be a sealant, a sealing rubber strip, etc., which is not limited here.

[0121] In some embodiments, the first seal 41 and / or the second seal 42 is an adhesive member, and the adhesive member is used to cooperate with the battery assembly 22.

[0122] Therefore, the first seal 41 is an adhesive part, which can ensure the sealing effect of the connection between the front cabin assembly 21 and the battery assembly 22 while enhancing the connection reliability between the front cabin assembly 21 and the battery assembly 22, and / or the second seal 42 is an adhesive part, which can ensure the sealing effect of the connection between the rear cabin assembly 23 and the battery assembly 22 while enhancing the connection reliability between the rear cabin assembly 23 and the battery assembly 22, and the structure is simpler, which is conducive to reducing costs.

[0123] In some embodiments, the battery assembly 22 includes a box body 221 and a battery cell disposed in the box body 221 , the box body 221 includes a door sill beam 222 , and the front cabin assembly 21 , the rear cabin assembly 23 and the upper body 10 are respectively detachably connected to the box body 221 .

[0124] Therefore, the box body 221 can provide shielding and protection for the battery cells, and the box body 221 includes a door sill beam 222, and the front cabin assembly 21, the rear cabin assembly 23 and the upper body 10 are respectively detachably connected to the box body 221, so that the box body 221 is integrated with the front cabin assembly 21 and the rear cabin assembly 23 as the vehicle body floor to form the lower body 20, thereby realizing the design of the box body 221 being integrated in the lower body 20.

[0125] For example, the box 221 includes a frame, which can provide shielding and protection for the battery cells. Components for installing the battery assembly 22 can be connected to the frame, such as at least one of the upper body 10, the front compartment assembly 21, and the rear compartment assembly 23 is connected to the frame, so that the battery assembly 22 can be installed from the edge, which is conducive to improving the stability of the installation of the battery assembly 22.

[0126] In addition, the box body 221 includes a threshold beam 222. The threshold beam 222 is a very important protective component of the vehicle 1000, which can effectively resist external intrusion in a side collision of the vehicle 1000, protect the integrity of the passenger compartment, and reduce the damage to the passengers in the vehicle.

[0127] The frame includes a threshold beam 222. In other words, the threshold beam 222 is connected to the frame wall of the frame to improve the overall structural strength of the box body 221; or the threshold beam 222 directly serves as the frame wall of the frame to reduce the number of components of the battery assembly 22, reduce the space occupied by the box body 221 to improve energy density, and reduce the weight of the entire vehicle.

[0128] It should be noted that the frame has an upper opening and a lower opening. The upper opening can be sealed by the upper body 10 or by other structures of the battery assembly 22; the lower opening can be sealed by components such as the bottom guard plate or by other structures of the battery assembly 22, which can place the battery cells in a relatively closed space.

[0129] For example, in some embodiments, the box body 221 further includes an upper cover body, which seals the upper opening of the frame body, and the upper cover body includes a front floor. In other words, the front floor is integrated with the battery assembly 22 and is disassembled and assembled together with the battery assembly 22. On the one hand, the upper opening can be sealed by the upper cover body before the battery assembly 22 is matched with the upper vehicle body 10, which is convenient for improving the sealing effect and the convenience of operation; on the other hand, it is conducive to reducing the number of parts of the upper cover body, for example, the front floor directly seals the upper opening without the need for other cover plate structures, so as to reduce the space and weight occupied by the box body 221 and improve the energy density.

[0130] In some embodiments, the box body 221 further includes a lower cover body, which seals the lower opening of the frame body, and the lower cover body includes a bottom guard plate. In other words, the bottom guard plate is integrated with the battery assembly 22 and is disassembled and assembled together with the battery assembly 22. On the one hand, as needed, the lower opening can be sealed by the lower cover body before the battery assembly 22 is matched with the upper body 10, which is convenient for improving the sealing effect and the convenience of operation; on the other hand, it is conducive to reducing the number of parts of the lower cover body, for example, the bottom guard plate directly seals the lower opening without the need for other cover plate structures, so as to reduce the space and weight occupied by the box body 221 and improve the energy density.

[0131] In a second aspect, the present application provides a vehicle body structure 100 , including an upper vehicle body 10 and a lower vehicle body 20 , wherein the lower vehicle body 20 is the lower vehicle body 20 in any of the above-mentioned embodiments, and the upper vehicle body 10 avoids a first connection portion 211 and a second connection portion 231 .

[0132] Among them, the upper body 10 avoids the first connection part 211 and the second connection part 231, that is, the first connection part 211 and the second connection part 231 are exposed on the upper body 10, for example, in the distribution direction of the upper body 10 and the lower body 20, the projection of the first connection part 211 does not overlap with the projection of the upper body 10, and in the distribution direction of the upper body 10 and the lower body 20, the projection of the second connection part 231 does not overlap with the projection of the upper body 10, that is, the upper body 10 will not block the first connection part 211 and the second connection part 231. That is, the upper body 10 will not block the first connection part 211 and the second connection part 231.

[0133] Therefore, when the battery assembly 22 needs to be repaired and replaced, since the upper body 10 will not block the first connection portion 211 and the second connection portion 231, the staff can disassemble the battery assembly 22 separately for repair and replacement without disassembling the upper body 10 and the front cabin assembly 21 and the rear cabin assembly 23, thereby improving the convenience of disassembly and assembly, which is conducive to improving the efficiency of replacement and maintenance and improving user experience.

[0134] In some embodiments, the vehicle body structure 100 further includes a third seal 43 , which seals a gap between the battery assembly 22 and the upper vehicle body 10 .

[0135] Thus, by providing the third seal 43 , the sealing performance of the connection between the upper vehicle body 10 and the battery assembly 22 can be improved.

[0136] In some embodiments, please refer to Figure 4 , the first sealing member 41 and / or the second sealing member 42 are connected to the third sealing member 43. Thus, the sealing gap can be reduced and the sealing effect can be improved.

[0137] For example, in some embodiments, see Figure 4The first sealing member 41 is an adhesive, which is bonded to the battery assembly 22 and the front compartment assembly 21. The adhesive is sticky and can achieve a better sealing effect, and is not easy to be misaligned during assembly to affect the sealing effect. When the battery assembly 22 needs to be disassembled, the adhesive can be removed by tearing it off without affecting the disassembly of the battery assembly 22.

[0138] Furthermore, in the embodiment where the first sealing member 41 is connected to the second sealing member 42 and / or the third sealing member 43, the connection can be achieved by utilizing the viscosity of the adhesive, which is beneficial to improving the sealing of the connection.

[0139] In some specific embodiments, the adhesive may be a weak adhesive, that is, an adhesive with relatively weak viscosity, which can reduce the difficulty of tearing and removing while achieving sealing. For example, the weak adhesive may be butyl glue.

[0140] In the embodiment where the third sealing member 41 is an elastic sealing ring or an adhesive, the second sealing member 42 and the first sealing member 41 may be of the same type or different types, for example, both may be elastic sealing rings or both may be adhesives, for example, one may be an elastic sealing ring and the other two may be adhesives, etc.

[0141] In some specific embodiments, at least one of the first sealing member 41 and the second sealing member 42 may be adhesive glue, and the type of the adhesive glue is the same as the type of the adhesive glue of the third sealing member 43, for example, both are butyl glue. Glues of the same type are more compatible with each other, which can improve the sealing of the connection and facilitate improving the sealing effect of the battery assembly 22 after disassembly and assembly.

[0142] In some embodiments, the third sealing member 43 is an elastic sealing ring, which is pressed tightly with the battery assembly 22 and the upper vehicle body 10 .

[0143] The elastic sealing ring is a sealing ring that can be elastically deformed, for example, it can be made of rubber, silicone, etc. Therefore, the elastic sealing ring is compressed by the pressure formed by the cooperation between the battery assembly 22 and the upper vehicle body 10, which is conducive to improving the sealing effect, and when the battery assembly 22 needs to be disassembled, the compression force on the elastic sealing ring can be cancelled by releasing the fixing structure of the battery assembly 22, and the elastic sealing ring can be separated from the battery assembly 22 and the upper vehicle body 10, making it easy to disassemble and assemble the battery assembly 22.

[0144] In some embodiments, a portion of the battery assembly 22 is detachably connected to the upper vehicle body 10 in the left-right direction.

[0145] The “left-right direction” refers to the width direction of the vehicle 1000 , that is, the Y direction.

[0146] Since the upper body 10 and the lower body 20 are usually distributed in the up and down direction, that is, the height direction Z of the vehicle 1000, that is, the upper body 10 and the battery assembly 22 are distributed in the up and down direction, therefore, by arranging a part of the battery assembly 22 to be detachably connected to the upper body 10 in the left and right direction Y, when loading and unloading the battery assembly 22, the battery assembly 22 and the upper body 10 can be disassembled in the left and right direction Y to avoid the upper body 10 obstructing the loading and unloading process, and since the front cabin assembly 21 and the rear cabin assembly 22 are distributed on the front and rear sides of the battery assembly 22, the disassembly of the battery assembly 22 from the upper body 10 in the left and right direction Y can also avoid the disassembly process from interfering with the front cabin assembly 21 or the rear cabin assembly 23, so as to reduce the difficulty of loading and unloading the battery assembly 22.

[0147] In some embodiments, in the left-right direction, a portion of the battery assembly 22 is detachably connected to the front compartment assembly 21 , and a portion of the battery assembly 22 is detachably connected to the rear compartment assembly 23 .

[0148] The “left-right direction” refers to the width direction of the vehicle 1000 , that is, the Y direction.

[0149] Since the front cabin assembly 21 and the rear cabin assembly 22 are distributed on the front and rear sides of the battery assembly 22, a part of the battery assembly 22 is detachably connected to the front cabin assembly 21 in the left-right direction Y and a part of it is detachably connected to the rear cabin assembly 22. Therefore, when loading and unloading the battery assembly 22, the battery assembly 22 can be disassembled from the front cabin assembly 21 and the rear cabin assembly 22 in the left-right direction Y to avoid the front cabin assembly 21 and the rear cabin assembly 22 obstructing the loading and unloading process. Moreover, since the upper body 10 and the lower body 20 are usually distributed in the up-and-down direction, that is, the height direction Z of the vehicle 1000, that is, the upper body 10 and the battery assembly 22 are distributed in the up-and-down direction. Therefore, the disassembly of the battery assembly 22 from the front cabin assembly 21 and the rear cabin assembly 22 in the left-and-right direction Y can also avoid the interference of the disassembly process with the upper body 10 to reduce the difficulty of loading and unloading the battery assembly 22.

[0150] In any of the above-mentioned embodiments, the battery assembly 22 and the upper vehicle body 10 are detachably connected in the up-down direction.

[0151] The “up-down direction” refers to the height direction of the vehicle 1000 , that is, the Z direction.

[0152] Since the upper body 10 and the lower body 20 are usually distributed in the up-down direction, i.e., the height direction Z of the vehicle 1000, that is, the upper body 10 and the battery assembly 22 are distributed in the up-down direction, the battery assembly 22 and the upper body 10 are detachably connected in the up-down direction so that the loading and unloading direction of the battery assembly 22 and the upper body 10 are the same as the distribution direction, thereby reducing the difficulty of setting the battery assembly 22.

[0153] In a third aspect, the present application provides a vehicle 1000 , comprising a vehicle body structure 100 in any one of the above-mentioned embodiments.

[0154] According to some embodiments of the present application, a lower body 20 is provided, including: a front cabin assembly 21, a battery assembly 22 and a rear cabin assembly 23, the front cabin assembly 21 is provided with a first connection portion 211 and a first upper body connection portion 212 arranged at intervals, the first connection portion 211 is detachably connected to the battery assembly 22, the rear cabin assembly 23 is provided with a second connection portion 231 and a second upper body connection portion 232 arranged at intervals, the second connection portion 231 is detachably connected to the battery assembly 22, and the battery assembly 22 is suitable for being detachably connected to the upper body 10; the first upper body connection portion 212 and the second upper body connection portion 232 are suitable for being connected to the upper body 10. In this way, the battery assembly 22 is integrated into the lower body 20, which is beneficial to reducing the number of parts and reducing the total weight of the lower body 20, and by arranging the battery assembly 22 to be independently disassembled relative to the front cabin assembly 21 and the rear cabin assembly 23, and the first connection portion 211 and the first upper body connection portion 212 are spaced apart, and the second connection portion 231 and the second upper body connection portion 232 are spaced apart, so that when the battery assembly 22 needs to be repaired and replaced, the battery assembly 22 can be disassembled separately for repair and replacement without disassembling the upper body 10 and the front cabin assembly 21 and the rear cabin assembly 23, thereby improving the convenience of disassembly and assembly, which is beneficial to improving the replacement and maintenance efficiency and improving the user experience.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A lower vehicle body, characterized in that: The lower vehicle body comprises a front cabin assembly, a battery assembly and a rear cabin assembly, the front cabin assembly is provided with a first connection portion and a first upper vehicle body connection portion which are spaced apart, the rear cabin assembly is provided with a second connection portion and a second upper vehicle body connection portion which are spaced apart, the front cabin assembly, the rear cabin assembly and the battery assembly are configured to be detachably connected to the battery assembly via the first connection portion and the second connection portion, so that the battery assembly can be independently detached away from the upper vehicle body; The first connection portion includes a front side fixing portion, the front side fixing portion is detachably connected to the battery assembly, and a first part of the front side fixing portion is located on the inner side of the battery assembly.

2. The lower vehicle body according to claim 1, characterized in that: The first connection portion includes a front top fixing portion, and the front side fixing portions are provided on both left and right sides of the front top fixing portion, and the front top fixing portion is detachably connected to the battery assembly.

3. The lower vehicle body according to claim 2, characterized in that: The lower body further includes a first fastener and a second fastener, wherein the first fastener passes through the battery assembly and is fixed to the first portion, and the second fastener passes through the first portion and is fixed to the battery assembly.

4. The lower vehicle body according to claim 3, characterized in that: There are a plurality of first fasteners, a portion of which are arranged at intervals along a first direction, and another portion of which are arranged at intervals along a second direction, and the first direction and the second direction have an included angle.

5. The lower vehicle body according to claim 3, characterized in that: The second portion of the front side fixing portion is located above the battery assembly; The lower body further includes a third fastener that sequentially passes through the second portion and is fixed to the battery assembly.

6. The lower vehicle body according to claim 2, characterized in that: The front top fixing portion is located above the battery assembly; The lower body further includes a fourth fastener that passes through the front top fixing portion and is fixed to the battery assembly.

7. The lower vehicle body according to any one of claims 1 to 6, characterized in that: The second connection part includes a rear side fixing part, the rear side fixing part includes a third part and a fourth part, the third part is located above the fourth part, and the third part and the fourth part are both located above the battery assembly; The lower body further includes a plurality of fifth fasteners, a portion of the fifth fasteners passing through the third portion and being fixed to the battery assembly, and another portion of the fifth fasteners passing through the fourth portion and being fixed to the battery assembly.

8. The lower vehicle body according to claim 7, characterized in that: The rear side fixing portion further includes a fifth portion, and the fifth portion is located on the inner side of the battery assembly; The lower body further includes a sixth fastener passing through the fifth portion and fixed to the battery assembly.

9. The lower vehicle body according to claim 7, characterized in that: The second connection part also includes a rear top fixing part, and the rear side fixing parts are provided on both sides of the rear top fixing part; The rear top fixing portion is located above the battery assembly; The lower vehicle body further includes a seventh fastener, which passes through the rear top fixing portion and is fixed to the battery assembly.

10. The lower vehicle body according to any one of claims 1 to 9, characterized in that: It also includes a first seal and a second seal, wherein the first seal seals the gap between the front compartment assembly and the battery assembly, and the second seal seals the gap between the rear compartment assembly and the battery assembly.

11. The lower vehicle body according to claim 10, characterized in that: The first sealing member and / or the second sealing member is an adhesive member, and the adhesive member is used to cooperate with the battery assembly.

12. The lower vehicle body according to any one of claims 1 to 11, characterized in that: The battery assembly comprises a box body and a battery cell arranged in the box body, the box body comprises a door sill beam, and the front cabin assembly and the rear cabin assembly are respectively detachably connected to the box body.

13. A vehicle body structure, characterized in that: The vehicle comprises an upper vehicle body and a lower vehicle body, wherein the lower vehicle body is the lower vehicle body according to any one of claims 1 to 12, and the upper vehicle body avoids the first connection portion and the second connection portion.

14. The vehicle body structure according to claim 13, characterized in that: The vehicle also includes a third seal, which seals a gap between the battery assembly and the upper vehicle body.

15. The vehicle body structure according to claim 13, characterized in that: In the left-right direction, a portion of the battery assembly is detachably connected to the upper vehicle body.

16. The vehicle body structure according to claim 13, characterized in that: In the left-right direction, a portion of the battery assembly is detachably connected to the front compartment assembly, and a portion of the battery assembly is detachably connected to the rear compartment assembly.

17. A vehicle, characterized in that: Comprising a vehicle body structure according to any one of claims 13-16.

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