Underbody, vehicle body structure, and vehicle

Abstract

An underbody (20), a vehicle body structure (100), and a vehicle (1000). The underbody (20) comprises: 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 connecting portion (211) and a first upper vehicle body connecting portion which are spaced apart from each other; the rear cabin assembly (23) is provided with a second connecting portion (231) and a second upper vehicle body connecting portion which are spaced apart from each other; and the front cabin assembly (21), the rear cabin assembly (23) and the battery assembly (22) are configured such that the front cabin assembly (21) and the rear cabin assembly (23) are detachably connected to the battery assembly (22) by means of the first connecting portion (211) and the second connecting portion (231), and the battery assembly (22) is allowed to be independently detached in a manner away from an upper vehicle body (10).

Description

Underbody, body structure and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application number 202311632457.X filed by Contemporary Amperex Technology Co., Ltd. on November 30, 2023, entitled “Lower body, body structure and vehicle,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of vehicle technology, and in particular to a lower vehicle body, a vehicle body structure, and a vehicle. Background Art

[0004] Battery-to-body integration (CTC), which integrates the battery pack and chassis, has become a key area of ​​research and development for improving efficiency and reducing costs. However, this integrated design complicates assembly and disassembly of the battery pack, hindering after-sales repairs.

[0005] Summary of the Invention

[0006] 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.

[0007] In a first aspect, an embodiment of the present application 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 that are spaced apart, the rear cabin assembly is provided with a second connection portion and a second upper body connection portion that 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 through the first connection portion and the second connection portion, allowing the battery assembly to be independently disassembled away from the upper body.

[0008] 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 parts and reducing the total weight of the lower body. In addition, the battery assembly is provided to be independently detachable relative to the front cabin assembly and the rear cabin assembly, allowing the battery assembly to be independently disassembled away from the upper body. Therefore, 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, thereby improving the convenience of disassembly and assembly, and helping to improve the efficiency of replacement and repair, and improving user experience.

[0009] 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 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.

[0010] In the above technical solution, by setting the first connection part including the front side fixing part and the front top fixing part, when the first connection part is connected to the battery assembly, it can be detachably connected to the battery assembly through the front side fixing part and the front top fixing part respectively, thereby enhancing the connection area between the front cabin assembly and the battery assembly, so as to enhance the connection stability between the front cabin assembly and the battery assembly.

[0011] 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.

[0012] 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 and right 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 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.

[0013] 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 passed from the outside to the inside along the left and right direction to achieve the connection between the first part and the battery assembly, and the second fastener is roughly passed from the inside to the outside along the left and 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.

[0014] In some embodiments, there are multiple first fasteners, wherein some of the first fasteners are spaced apart along a first direction, and another portion of the first fasteners are spaced apart along a second direction, and the first direction and the second direction have an angle.

[0015] 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 multiple 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 its connection stability.

[0016] In some embodiments, the second portion of the front side fixing portion is located above the battery assembly; the lower body further includes a third fastener, which passes through the second portion in sequence and is fixed to the battery assembly.

[0017] 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 directly move downward 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.

[0018] 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.

[0019] In the above technical solution, by arranging 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 directly move downward below 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.

[0020] 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 part of the fifth fasteners passes through the third part and is fixed to the battery assembly, and another part of the fifth fasteners passes through the fourth part and is fixed to the battery assembly.

[0021] In the above technical solution, by arranging the third part and the fourth part to be located 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 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.

[0022] 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.

[0023] 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.

[0024] 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 and right directions 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 outside 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 fifth part and the disassembly movement of 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 passed from the inside to the outside along the left and right directions 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 and right directions 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.

[0025] 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.

[0026] In the above technical solution, the rear top fixing portion is arranged to be located 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 upper and lower 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 rear top fixing portion and the disassembly movement of the battery assembly, wherein the seventh fastener is fixed to the battery assembly through the rear top fixing portion, that is, the seventh fastener is roughly passed from top to bottom along the upper and lower directions to achieve fixation of the rear top fixing portion and the battery assembly, thereby enhancing the connection stability of the rear top fixing portion and the battery assembly in the upper and lower directions 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.

[0027] In some embodiments, the lower body further includes a first seal and a second seal, the first seal sealing the gap between the front compartment assembly and the battery assembly, and the second seal sealing the gap between the rear compartment assembly and the battery assembly.

[0028] In the above technical solution, the provision of the first seal can improve the sealing between the front compartment assembly and the battery assembly, and the provision of the second seal can improve the sealing between the rear compartment assembly and the battery assembly.

[0029] In some embodiments, 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.

[0030] In the above technical solution, the first seal is an adhesive part, 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 part, 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.

[0031] 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.

[0032] In the above technical solution, the box can provide shielding and protection for the battery cells. The box includes a door sill beam, and the front cabin assembly, rear cabin assembly and upper body are respectively detachably connected to the box, so that the box can be used as the body floor and integrated with the front cabin assembly and rear cabin assembly to form the lower body, thereby realizing the design of the box integrated in the lower body.

[0033] 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 one of the above embodiments, and the upper vehicle body avoids the first connection portion and the second connection portion.

[0034] 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.

[0035] In the above technical solution, by providing a third seal, the sealing performance of the connection between the upper vehicle body and the battery assembly can be improved.

[0036] In some embodiments, a portion of the battery assembly is detachably connected to the upper vehicle body in the left-right direction.

[0037] In the above technical solution, by setting a part of the battery assembly to be detachably connected to the upper body in the left and right directions, 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.

[0038] 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.

[0039] In the above technical solution, by setting a part of the battery assembly to be detachably connected to the front compartment assembly in the left and right directions and a part to be detachably connected to the rear compartment assembly, 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.

[0040] In a third aspect, the present application provides a vehicle comprising the vehicle body structure in any one of the above embodiments.

[0041] 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

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0043] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0044] FIG2 is a schematic diagram of a vehicle body structure according to some embodiments of the present application;

[0045] FIG3 is a schematic diagram of an exploded structure of a vehicle body structure according to some embodiments of the present application;

[0046] FIG4 is a schematic diagram of the exploded structure of the lower vehicle body in some embodiments of the present application;

[0047] Figure 5 is an enlarged view of point A in Figure 2;

[0048] Figure 6 is an enlarged view of point B in Figure 2;

[0049] FIG7 is an enlarged view of point E in FIG3 ;

[0050] FIG8 is an enlarged view of point C in FIG2 ;

[0051] FIG9 is an enlarged view of point D in FIG2 .

[0052] Reference numerals: Vehicle 1000; Vehicle front-rear direction X; Vehicle left-right direction Y; Vehicle up-down direction Z; Vehicle body structure 100; Controller 200; Motor 300; Upper vehicle body 10; Lower vehicle 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 compartment 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 will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended 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 those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0056] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, 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 this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects 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., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot 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 expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0061] At present, from the perspective of market development, the application of vehicles is becoming more and more extensive. Vehicles include body structures. As the application scope of vehicles continues to expand, the market demand for body structures is also constantly increasing.

[0062] In related technologies, the vehicle's body structure includes multiple mounting parts such as the vehicle 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 vehicle body separately according to their structural layout. This leads to disadvantages such as 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, when 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 hours, high maintenance costs and inconvenience for after-sales maintenance, in this 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 into 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 disassembled 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 helping to improve 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 to improve replacement and maintenance efficiency and enhance user experience.

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

[0067] Please refer to FIG1 , which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an augmented-range vehicle, etc. The vehicle 1000 includes a body structure 100 , which includes an upper body 10 and a lower body 20 , wherein 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 transmit the front collision load, and the rear cabin assembly 23 has the important functions of placing a spare tire and reducing fuel tank damage and passenger injuries 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 this application 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 serve as the operating power source of 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, which are fastened together to form a sealed box 221. In other embodiments, the box 221 includes a frame having an upper opening and a lower opening, and the frame cooperates with other structures of the vehicle 1000 to form a sealed structure. In still other embodiments, the box 221 includes one of an upper cover and a lower cover, and the upper cover is used to cover the upper opening of the frame, and the lower cover is used to cover the lower 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 application.

[0070] Battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the present application does not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the present application does not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the present application does not limit this.

[0071] For example, a battery cell may include a housing, an electrode assembly, and an electrolyte. The housing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets.

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

[0073] The directions of up, down, front, back, left, and right are all based on the orientation of the vehicle 1000. That is, the direction from the front to the rear of the vehicle is the front-to-back direction, the direction from the roof to the bottom of the vehicle is the top-to-bottom direction, and the driver's seat and the passenger seat are arranged in the left-right direction. For example, the front-to-back direction (i.e., the length direction) of the vehicle 1000 is the X-direction, the left-to-right direction (i.e., the width direction) of the vehicle 1000 is the Y-direction, and the up-down direction (i.e., the height direction) of the vehicle 1000 is the Z-direction.

[0074] Please refer to Figures 2 to 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 connecting portion 211 and a first upper body connecting portion 212 that are spaced apart. The rear cabin assembly 23 is provided with a second connecting portion 231 and a second upper body connecting portion 232 that 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 through the first connecting portion 211 and the second connecting 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 part 211 and the first upper body connection part 212 are arranged at intervals" means that when the first connection part 211 and the first upper body connection part 212 are connected to the battery assembly 22 and the upper body 10 respectively, the connection method of the first connection part 211 and the connection method of the first upper body connection part 212 do not interfere with each other, wherein the first connection part 211 and the first upper body connection part 212 can be constructed as different sheet metal parts, or the first connection part 211 and the first upper body connection part 212 can be constructed as different areas of the same sheet metal part, which is not limited here.

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

[0079] The detachable connection between the first connection portion 211 of the front compartment assembly 21 and the battery assembly 22 may be achieved by, but is not limited to, clearance fit, abutment, snap-fit, bonding, bolting, etc. Similarly, the detachable connection between the second connection portion 231 of the rear compartment assembly 23 and the battery assembly 22, and between the battery assembly 22 and the upper vehicle body 10, may be achieved by, but is not limited to, clearance fit, abutment, snap-fit, 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 part 211 and the second connection part 231 are both connected to the battery assembly 22 through corresponding bolts, and the bolts at the first connection part 211 do not interfere with the bolts at the first upper body connection part 212, and the bolts at the second connection part 231 do not interfere with the bolts at the second upper body connection part 232. In this way, when disassembling the battery assembly 22, it is easier to disassemble the bolts at the first connection part 211 and the bolts at the second connection part 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 part of the above-mentioned bolts. The shielding structure may be other interior structures such as a car carpet or floor mat to shield part of the above-mentioned bolts, avoid interference with other structures, and make them not directly visible, thereby enhancing 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 part 211 and the second connection part 231, the staff can disassemble the battery assembly 22 separately away from the upper body 10 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.

[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 remain 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 the upper body 10, the connection between the battery assembly 22 and the front compartment assembly 21 and the rear compartment assembly 23 can be disconnected while the front compartment assembly 21 and the rear compartment assembly are respectively connected to the upper body 10, thereby facilitating 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 via fasteners, the connection between the battery assembly 22 and the upper body 10 can be disconnected without affecting the connection between the front compartment assembly 21 and the rear compartment assembly 23 and the upper body 10, thereby facilitating 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 scope of protection of the present application.

[0088] According to the lower body 20 of the embodiment of the present application, 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 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 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, so that when the battery assembly 22 needs to be repaired and replaced, since the upper body 10 will not block the first connection part 211 and the second connection part 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, and helping to improve the replacement and maintenance efficiency and improve the user experience.

[0089] In some embodiments, please refer to Figure 4, the first connection part 211 includes a front side fixing part 2111 and a front top fixing part 2112, and a front side fixing part 2111 is provided on both sides of the left and right sides of the front top fixing part 2112. The front side fixing part 2111 is detachably connected to the battery assembly 22, and the front top fixing part 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, referring to Figures 5 and 6 , Figure 5 is an enlarged view of point A in Figure 2 , and Figure 6 is an enlarged view of point B in Figure 2 , the first portion 21111 of the front side fixing portion 2111 is located inside the battery assembly 22 ; the lower body 20 further 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 portion 21111 , while the second fastener 32 passes through the first portion 21111 and is fixed to the battery assembly 22 .

[0092] The “inside” refers to a side closer to the inside of the vehicle in the left-right direction, and conversely, the “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 part 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 part 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 first part 21111 and the disassembly movement of 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 passed through from the outside to the inside along the left and right direction to realize the connection between the first part 21111 and the battery assembly 22, and the second fastener 32 is roughly passed through from the inside to the outside along the left and right direction to realize 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, referring to Figures 5 and 7, Figure 7 is an enlarged view of point E in Figure 3. There are multiple first fasteners 31, with some first fasteners 31 spaced apart along a first direction L1, and others spaced apart along a second direction L2, with the first direction and the second direction forming an angle.

[0097] For example, the first direction is the front-to-back 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 multiple 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 its connection stability.

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

[0099] Thus, by arranging 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 passed through the second part 21112 and fixed to the battery assembly 22, that is, the fixing direction of the third fastener 33 is approximately 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, 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, referring to FIG. 6 , the front top fixing portion 2112 is located above the battery assembly 22 ; the lower body 20 further 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 below 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 passed 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 can be constructed as a bolt, a connecting column or other structures, which are not limited here. When the fourth fastener 34 is constructed 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 . Please refer to FIG. 8 , which is an enlarged view of point C in FIG. 2 .

[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] Thus, by setting 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] 8 , a portion of the fifth fasteners 35 and another portion of the fifth fasteners 35 are respectively fixed to the battery assembly 22 through the third portion 23111 and the fourth portion 23112, and the third portion 23111 is located above the fourth portion 23112, so that multiple fifth fasteners 35 can fix the rear side fixing portion 2311 and the battery assembly 22 at two heights, thereby enhancing the connection strength between the rear side fixing portion 2311 and the battery assembly 22, and further enhancing the connection stability.

[0108] For example, the fifth fastener 35 can be constructed as a bolt, a connecting column or other structures, which are 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 , which is an enlarged view of point D in FIG. 2 .

[0110] The rear side fixing portion 2311 further includes a fifth portion 23113 , which is located on the inner side of the battery assembly 22 ; the lower body 20 further 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, 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 fifth part 23113 to separate from the fifth part 23113, so as to avoid interference between the fifth part 23113 and the disassembly movement of 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 passed from the inside to the outside along the left and 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 and right directions 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 can be constructed as a bolt, a connecting column, or other structures, which are not limited here. When the sixth fastener 36 is constructed as a bolt, a nut is correspondingly embedded on the battery assembly 22.

[0114] In some embodiments, please refer to Figure 9, the second connection part 231 also includes a rear top fixing part 2312, and rear side fixing parts 2311 are provided on both sides of the rear top fixing part 2312; the rear top fixing part 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 part 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 upper and lower 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 be directly moved 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, 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, referring to FIG. 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 sealing member 41 and / or the second sealing member 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 . 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. 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 into the lower body 20.

[0125] For example, the housing 221 includes a frame that provides shelter and protection for the battery cells. Components used to mount 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. This allows for edge mounting of the battery assembly 22, improving the stability of the battery assembly 22.

[0126] In addition, the box body 221 includes a sill beam 222. The sill beam 222 is a very important protective component of the vehicle 1000. It can effectively resist external intrusion in the event of a side collision of the vehicle 1000, protect the integrity of the passenger compartment, and reduce injuries to 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 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 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 housing 221 further includes an upper cover that seals the upper opening of the frame and includes a front floor. In other words, the front floor is integrated with the battery assembly 22 and is assembled and disassembled along with the battery assembly 22. This allows the upper cover to seal the upper opening before the battery assembly 22 is assembled with the upper vehicle body 10, improving sealing effectiveness and ease of operation. Furthermore, it reduces the number of components in the upper cover. For example, the front floor directly seals the upper opening without the need for a separate cover structure, thereby reducing the space and weight of the housing 221 and improving energy density.

[0130] In some embodiments, the housing 221 further includes a lower cover that seals the lower opening of the frame and includes a bottom guard plate. In other words, the bottom guard plate is integrated with the battery assembly 22 and is assembled and disassembled along with the battery assembly 22. This allows the lower cover to seal the lower opening as needed before the battery assembly 22 is mated with the upper body 10, improving sealing effectiveness and ease of operation. Furthermore, this helps reduce the number of components in the lower cover. For example, the bottom guard plate directly seals the lower opening, eliminating the need for a separate cover plate structure. This reduces the space and weight occupied by the housing 221 and improves 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 the first connection portion 211 and the second connection portion 231 .

[0132] The upper body 10 avoids the first connection portion 211 and the second connection portion 231, that is, the first connection portion 211 and the second connection portion 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 portion 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 portion 231 does not overlap with the projection of the upper body 10, that is, the upper body 10 does not block the first connection portion 211 and the second connection portion 231. In other words, the upper body 10 does not block the first connection portion 211 and the second connection portion 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 part 211 and the second connection part 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] 4 , the first sealing member 41 and / or the second sealing member 42 are connected to the third sealing member 43 , thereby reducing the sealing gap and improving the sealing effect.

[0137] For example, in some embodiments, referring to FIG. 4 , the first sealing member 41 is adhesive, which bonds the battery assembly 22 and the front compartment assembly 21. The adhesive's viscous properties provide a better seal and prevent misalignment during assembly, which could compromise the seal. When disassembling the battery assembly 22, the adhesive can be removed by tearing it off without interfering with disassembly.

[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 performance 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 achieve sealing while reducing the difficulty of tearing and removing. For example, the weak adhesive may be butyl putty.

[0140] In the embodiment where the third sealing member 41 is an elastic sealing ring or adhesive, the second sealing member 42 and the first sealing member 41 may be of the same 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, and the adhesive may be the same type as the adhesive of the third sealing member 43, such as butyl cement. Adhesives of the same type blend better with each other, improving the sealing of the joint and facilitating improved sealing of the battery assembly 22 after assembly and disassembly.

[0142] In some embodiments, the third sealing member 43 is an elastic sealing ring that is press-fitted with the battery assembly 22 and the upper vehicle body 10 .

[0143] An elastic sealing ring is a sealing ring capable of elastic deformation and can be made of, for example, rubber or silicone. The pressure generated by the battery assembly 22 and the upper vehicle body 10 compresses the elastic sealing ring, thereby improving the sealing effect. Furthermore, when the battery assembly 22 needs to be removed, the compressive force on the elastic sealing ring can be released by releasing the fixing structure of the battery assembly 22, allowing the elastic sealing ring to separate from the battery assembly 22 and the upper vehicle body 10, making it easier to remove 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 setting 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, by setting a part of the battery assembly 22 to be detachably connected to the front cabin assembly 21 in the left-right direction Y and a part to be detachably connected to the rear cabin assembly 22, 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, and 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-right direction Y can also avoid the disassembly process from interfering with the upper body 10, so as to reduce the difficulty of loading and unloading the battery assembly 22.

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

[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, 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-down direction, the battery assembly 22 and the upper body 10 are provided to be 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 up the battery assembly 22.

[0153] In a third aspect, the present application provides a vehicle 1000 , comprising the vehicle body structure 100 in any one of the above 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 connecting portion 211 and a first upper body connecting portion 212 arranged at intervals, the first connecting portion 211 is detachably connected to the battery assembly 22, the rear cabin assembly 23 is provided with a second connecting portion 231 and a second upper body connecting portion 232 arranged at intervals, the second connecting portion 231 is detachably connected to the battery assembly 22, and the battery assembly 22 is suitable for detachably connecting to the upper body 10; the first upper body connecting portion 212 and the second upper body connecting portion 232 are suitable for connecting 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. The battery assembly 22 is independently disassembled relative to the front cabin assembly 21 and the rear cabin assembly 23, and the first connection part 211 and the first upper body connection part 212 are spaced apart, and the second connection part 231 and the second upper body connection part 232 are spaced apart. Therefore, 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, and helping to improve the efficiency of replacement and maintenance and improve 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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, wherein: 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 via the first connection portion and the second connection portion, allowing the battery assembly to be independently disassembled away from the upper vehicle body.

2. The lower vehicle body according to claim 1, wherein: The first connection portion includes a front side fixing portion and a front top fixing portion, the front side fixing portions are provided on both 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.

3. The lower vehicle body according to claim 2, wherein: The first part of the front side fixing portion is located on the inner side of the battery assembly; 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: Comprising a vehicle body structure according to any one of claims 13-16.

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