Chassis and vehicle

Abstract

The utility model is suitable for the technical field of vehicles, and provides a chassis and a vehicle, the chassis comprises a chassis frame, and the chassis frame forms a through containing space with openings in the two sides; a plurality of battery cells accommodated in the accommodating space; the fixing assembly is detachably connected to the chassis frame and is connected to the battery monomers, so that the battery monomers are fixed in the accommodating space; according to the chassis provided by the embodiment of the invention, the accommodating space is formed on the chassis frame, and the battery monomers are directly accommodated in the accommodating space, so that structures such as a frame structure of the battery device are saved, the space occupied by the saved structures such as the frame structure is reduced, and the space utilization rate of the battery device is improved; according to the battery device, the fixing assembly is detachably connected to the chassis, and the battery monomers are connected to the fixing assembly, so that a worker can directly detach the battery monomers from the chassis frame by detaching the fixing assembly, the detaching steps of the battery device are simplified, and the detaching and mounting difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicles, and particularly relates to a chassis and a vehicle. BACKGROUND

[0002] The battery device, as a power supply component of an electric vehicle, plays an important role in the endurance, cost and service life of the vehicle. At present, the battery device is mainly integrated in the form of a battery pack on the floor of the vehicle body as a part of the vehicle structure. Such a setting easily leads to difficult disassembly of the battery device, high difficulty and high cost of maintenance and replacement, and a relatively complex structure of the battery device and low space utilization. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the application provides a chassis and a vehicle, which can reduce the installation and disassembly difficulty of the battery device and improve the space utilization.

[0004] In a first aspect, an embodiment of the application provides a chassis, comprising:

[0005] A chassis frame forms an accommodating space with both sides open and through; a plurality of battery monomers are accommodated in the accommodating space; and a fixing assembly is detachably connected to the chassis frame and connected to the battery monomers to fix the battery monomers in the accommodating space.

[0006] In the technical solution of the embodiment, the accommodating space is formed on the chassis frame, and the battery monomers are directly accommodated in the accommodating space, thereby saving the frame structure of the battery device and reducing the space occupation of the saved frame structure, improving the space utilization of the battery device; the fixing assembly is detachably connected to the chassis, and the battery monomers are connected to the fixing assembly, so that the worker can directly disassemble the battery monomers from the chassis frame by disassembling the fixing assembly, thereby simplifying the disassembly steps of the battery device and reducing the disassembly and installation difficulty.

[0007] In some embodiments, the fixing assembly comprises a top structure, the top structure covers the open side of the accommodating space, the top structure is connected to the battery monomers to fix the battery monomers in the accommodating space, and the top structure is detachably connected to the chassis frame.

[0008] The technical solution of the embodiment provides a specific structure of the fixing assembly, so that the fixing assembly comprises the top structure detachably connected to the chassis frame, and the battery monomers are connected to the top structure, so that the worker can directly disassemble the battery monomers from the chassis frame by disassembling the top structure, thereby simplifying the disassembly steps of the battery device and reducing the disassembly and installation difficulty.

[0009] In some embodiments, the top structure comprises a carrier and a top beam body, the carrier covers the open side of the accommodating space, and the battery cell is connected to the carrier; the top beam body is arranged on the side of the carrier away from the battery cell, and the top beam body is detachably connected to the chassis frame.

[0010] The technical scheme of the embodiment provides specific structures of the top structure, so that the top structure comprises a carrier to support the battery cell through the carrier; the top structure comprises a top beam body, and the top beam body is detachably connected to the chassis frame to fix the carrier through the top beam body, so that the top structure can be directly detached from the chassis frame by detaching the top beam body, and the battery cell can be detached from the chassis frame, thereby further reducing the difficulty of disassembling and assembling the battery device.

[0011] In some embodiments, the top beam body comprises a first beam body, opposite sides of the first beam body are connected to different positions of the chassis frame respectively, and the length direction of the first beam body is perpendicular to the length direction of the chassis.

[0012] In the technical scheme of the embodiment, the top beam body comprises a first beam body, and opposite sides of the first beam body are connected to different positions of the chassis frame respectively, so that the first beam body can better fix the carrier on the chassis frame.

[0013] In some embodiments, the top beam body further comprises a second beam body, one side of the second beam body is connected to the first beam body, and the other side of the second beam body is connected to the chassis frame; and the length direction of the second beam body is arranged at an angle with the length direction of the first beam body.

[0014] In the technical scheme of the embodiment, the top beam body comprises a second beam body, and the length direction of the second beam body is arranged at an angle with the length direction of the first beam body, so that the second beam body and the first beam body can be connected to different positions of the chassis frame respectively, thereby further providing support for the carrier and improving the carrying capacity and strength of the carrier.

[0015] In some embodiments, the number of the first beam bodies is at least two, and the at least two first beam bodies are arranged at intervals along the length direction of the chassis.

[0016] In the technical scheme of the embodiment, the number of the first beam bodies is two, so that each first beam body can better improve the strength and carrying capacity of the carrier.

[0017] In some embodiments, the top structure further comprises a connecting piece, one side of the connecting piece is detachably connected to the first beam body, and the other side of the connecting piece is detachably connected to the chassis frame, so as to detachably connect the first beam body to the chassis frame.

[0018] The technical scheme of the embodiment is characterized in that the connecting piece is arranged, and the first beam body is detachably connected to the chassis frame through the connecting piece, so that the first beam body can be detached from the chassis frame by the worker, thereby reducing the difficulty of detaching the battery device; meanwhile, the strength of the connecting part of the first beam body and the chassis frame can be improved, so that the first beam body can be better installed on the chassis frame.

[0019] In some embodiments, the top structure further comprises a first sealing member arranged between the carrier and the chassis frame.

[0020] The technical scheme of the embodiment is characterized in that the first sealing member is arranged between the chassis frame and the carrier to prevent external impurities from entering the containing space, thereby reducing the damage that the external environment may cause to the battery monomer.

[0021] In some embodiments, the carrier comprises a heat exchange assembly.

[0022] The technical scheme of the embodiment is characterized in that the carrier comprises the heat exchange assembly, so that the heat exchange assembly can not only control the temperature of the battery monomer, but also provide a connection basis for the battery monomer, thereby improving the utilization rate of the heat exchange assembly; in the case that the battery monomer is directly connected to the heat exchange assembly, the structure for connecting the battery monomer is saved, and the space utilization rate of the battery device is further improved.

[0023] In some embodiments, the carrier constitutes at least part of a floor structure of the chassis.

[0024] The technical scheme of the embodiment is characterized in that the carrier constitutes at least part of the floor structure, that is, the carrier can not only provide a connection basis for the battery monomer, but also constitute at least part of the floor structure, thereby further improving the utilization rate of the carrier; meanwhile, at least part of the floor structure is saved, and the space utilization rate of the battery device is further improved.

[0025] In some embodiments, the battery monomer comprises a shell and a pressure relief structure arranged on the shell; the side of the shell away from the pressure relief structure is connected to the top structure.

[0026] The technical scheme of the embodiment is characterized in that the pressure relief structure is arranged on the side of the battery monomer away from the top structure, so as to reduce the interference of the top structure on the discharge of gas by the pressure relief structure; in the case that the carrier constitutes at least part of the floor structure, the pressure relief structure can discharge gas in the direction away from the top structure, thereby improving the safety performance.

[0027] In some embodiments, the fixing assembly further comprises a bottom structure covering the open side of the containing space, the bottom structure is connected to the battery monomer to carry the battery monomer, and the bottom structure is detachably connected to the chassis frame.

[0028] The technical scheme of the embodiment provides specific structures of the fixing assembly, so that the fixing assembly comprises a bottom structure detachably connected to the bottom plate frame, and the battery monomer is connected to the bottom structure, so that the worker can directly detach the battery monomer from the bottom plate frame by detaching the bottom structure, thereby simplifying the step of detaching the battery device and reducing the difficulty of detaching and installing.

[0029] In some embodiments, the bottom structure comprises a bottom guard plate, the battery monomer is connected to the bottom guard plate, and the bottom guard plate covers the opening side of the accommodation space and is detachably connected to the bottom plate frame.

[0030] The technical scheme of the embodiment provides specific structures of the bottom structure, so that the bottom structure comprises a bottom guard plate, and the bottom guard plate is detachably connected to the bottom plate frame, so as to facilitate the detachment and installation of the battery monomer.

[0031] In some embodiments, the bottom structure further comprises a support connected to the bottom guard plate, and the support abuts against the battery monomer.

[0032] In the technical scheme of the embodiment, the support is provided to provide support for the battery monomer through the support, so that the battery monomer can be more stably connected to the bottom guard plate.

[0033] In some embodiments, the bottom structure further comprises a second sealing member arranged between the bottom guard plate and the bottom plate frame.

[0034] In the technical scheme of the embodiment, the second sealing member is arranged between the bottom plate frame and the bottom guard plate to prevent external impurities from entering the accommodation space, thereby reducing the damage that the external environment may cause to the battery monomer.

[0035] In some embodiments, the bottom guard plate also constitutes at least part of the protection structure of the bottom plate.

[0036] In the technical scheme of the embodiment, the bottom guard plate can not only provide a fixing base for the battery monomer, but also serve as a bottom protection structure of the vehicle, thereby improving the utilization rate of the bottom guard plate and saving the structure for supporting the battery monomer in the battery device, and further improving the space utilization rate of the battery device.

[0037] In some embodiments, the bottom plate further comprises an internal beam body connected to the bottom plate frame, at least part of the internal beam body is accommodated in the accommodation space, and the internal beam body divides the accommodation space into at least two subspaces to accommodate different battery monomers.

[0038] In the technical scheme of the embodiment, the internal beam body is arranged to divide the accommodation space through the internal beam body; at the same time, the internal beam body can also improve the strength of the bottom plate frame and provide support for the battery monomer.

[0039] In some embodiments, the internal beam body is detachably connected to the chassis frame.

[0040] In the technical scheme of the embodiment, the internal beam body is detachably connected to the chassis frame, so as to facilitate the disassembly and installation of the staff.

[0041] In some embodiments, the internal beam body comprises a third beam body detachably connected to the chassis frame, the length direction of the third beam body is perpendicular to the length direction of the chassis, and the third beam body abuts against the adjacent battery monomer.

[0042] In the technical scheme of the embodiment, the internal beam body comprises the third beam body, so as to improve the strength of the chassis frame through the third beam body, so that the chassis frame can better play the role of protecting the battery monomer; at the same time, the third beam body abuts against the battery monomer, so that the third beam body can also play the role of supporting the battery monomer and inhibiting the deformation of the battery monomer.

[0043] In some embodiments, the third beam body has at least two, and the at least two third beam bodies are arranged at intervals along the length direction of the chassis.

[0044] In the technical scheme of the embodiment, the third beam body has at least two, so that the third beam body can better improve the strength of the chassis frame and better provide support for the battery monomer.

[0045] In some embodiments, the internal beam body further comprises a fourth beam body, the fourth beam body is arranged on one side of the third beam body along the length direction of the chassis; one side of the fourth beam body is detachably connected to the chassis frame, and the other side of the fourth beam body is connected to the adjacent third beam body.

[0046] In the technical scheme of the embodiment, the internal beam body comprises the fourth beam body, and the two sides of the fourth beam body are connected to the chassis frame and the third beam body respectively, so as to improve the connection stability of the third beam body through the fourth beam body, and can improve the strength of the third beam body; at the same time, the setting of the fourth beam body can also improve the strength of the chassis frame.

[0047] In some embodiments, the third beam body is connected with at least two fourth beam bodies.

[0048] In the technical scheme of the embodiment, at least two fourth beam bodies are connected on one third beam body, so that the fourth beam body can better improve the strength of the third beam body and the chassis frame.

[0049] In some embodiments, the chassis further comprises a control device connected to the top structure.

[0050] In the technical scheme of the embodiment, the control device is arranged on the top structure, so as to facilitate the control device to collect and control the working state of the battery monomer.

[0051] In a second aspect, the embodiments of the present application further provide a vehicle comprising the chassis provided by some embodiments of the first aspect.

[0052] The above description is merely a summary of the technical solutions of the present application. In order to enable one of ordinary skill in the art to better understand the technical means of the present application and implement the same according to the contents of the specification, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent, the following detailed description of the embodiments of the present application is provided. BRIEF DESCRIPTION OF DRAWINGS

[0053] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals denote same or similar components. In the drawings:

[0054] Figure 1 Structure diagram of a vehicle provided by some embodiments of the present application;

[0055] Figure 2 Exploded structure diagram of a battery cell provided by some embodiments of the present application;

[0056] Figure 3 Perspective diagram of a chassis provided by some embodiments of the present application;

[0057] Figure 4 Exploded structure diagram of a chassis provided by some embodiments of the present application;

[0058] Figure 5 Perspective diagram of a top structure and a battery cell provided by some embodiments of the present application;

[0059] Figure 6 Exploded structure diagram of a top structure, a battery cell and a bottom structure provided by some embodiments of the present application.

[0060] The meanings of the labels in the figures are as follows:

[0061] 1000, vehicle;

[0062] 100, chassis;

[0063] 10, chassis frame; 101, accommodating space;

[0064] 20, fixing assembly; 21, top structure; 211, carrier; 212, top beam body; 2121, first beam body; 2122, second beam body; 213, connecting piece; 214, first sealing piece; 22, bottom structure; 221, bottom guard plate; 222, support piece; 223, second sealing piece; 23, inner beam body; 231, third beam body; 232, fourth beam body;

[0065] 30, battery cell; 31, outer shell; 311, housing; 312, end cap; 32, electrode assembly; 33, electrode terminal; 34, pressure relief structure;

[0066] 40, control device;

[0067] 200, vehicle body. DETAILED DESCRIPTION

[0068] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "include," "have," or "comprise" and variations thereof herein is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises more than one of a recited item does not thereby lose its identity.

[0070] In the description of the embodiments of the present application, the technical terms "first", "second", and the like 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 technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0071] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] 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, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0073] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0074] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0075] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled 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.

[0076] The battery device serves as a power supply component of the electric vehicle, and plays an important role in the endurance, cost and service life of the vehicle. The current battery device is mainly integrated in the form of a battery pack on the floor of the vehicle body as part of the vehicle structure. In such a setting, the external structure of the battery pack, such as the box, the support frame, the beam body and the like, all need to occupy space, and these structures cannot improve the endurance, output power and the like of the battery device, thereby resulting in a low space utilization rate of the battery device.

[0077] Currently, there are some schemes in which the battery device is directly integrated on the chassis. In such a setting, once the battery device is installed, it is difficult to disassemble, and the maintenance and replacement are difficult and costly.

[0078] Based on the above considerations, in order to improve the space utilization rate of the battery device and reduce the disassembly difficulty of the battery device, the embodiments of the present application provide a chassis, which forms an accommodation space on the chassis frame, and directly accommodates the battery monomer in the accommodation space, sets a fixing assembly, and makes the fixing assembly detachably connected to the chassis frame, and makes the battery monomer connected to the fixing assembly.

[0079] In the chassis, the chassis frame can serve as part of the frame structure of the battery device to provide protection and support for the battery monomer, saving the frame structure and the like of the battery device, and reducing the space occupied by the saved frame structure and the like, improving the space utilization rate of the battery device; the battery monomer is carried by the fixing assembly, and the fixing assembly is detachably connected to the chassis frame, so that the worker can directly disassemble the battery monomer from the chassis frame by disassembling the fixing assembly, simplifying the disassembly steps of the battery device and reducing the difficulty of disassembly and installation.

[0080] The chassis provided by the embodiments of the present application can be applied to new energy vehicles, including but not limited to pure electric vehicles, hybrid vehicles or extended range vehicles, etc.

[0081] In order to illustrate the technical solutions described in the present application, the following will be described in conjunction with specific drawings and embodiments.

[0082] Reference Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 includes a chassis 100 and a vehicle body 200, and the vehicle body 200 is arranged on the chassis 100 to support the vehicle body 200 through the chassis 100.

[0083] Reference Figure 2 , Figure 2 The exploded structural schematic diagram of the battery monomer 30 provided by some embodiments of the present application is shown. The battery monomer 30 refers to the smallest unit that constitutes a battery. As shown in the figure, the battery monomer 30 includes a shell 31, an electrode assembly 32 and other functional components; wherein the shell 31 includes an end cover 312 and a shell body 311.

[0084] The end cover 312 refers to a component that covers the opening of the shell 311 to isolate the internal environment of the battery cell 30 from the external environment. Without limitation, the shape of the end cover 312 can be adapted to the shape of the shell 311 to fit the shell 311. Optionally, the end cover 312 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 312 is less likely to deform when subjected to extrusion collision, allowing the battery cell 30 to have higher structural strength and improved safety performance. The end cover 312 can be provided with functional components such as the electrode terminal 33. The electrode terminal 33 can be used to electrically connect with the electrode assembly 32 for outputting or inputting the electrical energy of the battery cell 30. In some embodiments, the end cover 312 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 30 when the internal pressure or temperature reaches a threshold value. The material of the end cover 312 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 312, which can be used to isolate the electrical connection components in the shell 311 from the end cover 312 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0085] The shell 311 is a component for fitting the end cover 312 to form the internal environment of the battery cell 30, wherein the formed internal environment can be used to accommodate the electrode assembly 32, electrolyte and other components. The shell 311 and the end cover 312 can be independent components, and an opening can be provided on the shell 311, and the end cover 312 is covered on the opening to form the internal environment of the battery cell 30. Without limitation, the end cover 312 and the shell 311 can also be integrated, specifically, the end cover 312 and the shell 311 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 311, the end cover 312 is covered on the shell 311. The shell 311 can be various shapes and sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 311 can be determined according to the specific shape and size of the electrode assembly 32. The material of the shell 311 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0086] The electrode assembly 32 is a component in which an electrochemical reaction occurs in the battery cell 30. One or more electrode assemblies 32 can be contained within the case 311. The electrode assembly 32 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 32, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminal 33 to form a current loop.

[0087] In a first aspect, with reference to Figure 3 、 Figure 4 The embodiment of the present application provides a chassis 100, which comprises a chassis frame 10, a fixing assembly 20 and a battery cell 30. Wherein the chassis frame 10 forms an accommodating space 101 which is open at both sides and penetrates through; a plurality of battery cells 30 are accommodated in the accommodating space 101; the fixing assembly 20 is detachably connected to the chassis frame 10 and connected to the battery cell 30, so as to fix the battery cell 30 in the accommodating space 101.

[0088] The chassis frame 10 is the main structure of the chassis 100, and the chassis frame 10 can comprise a vehicle frame or other structures; a vehicle body 200 can be mounted on the chassis frame 10, and a suspension system, a braking system, a transmission system or other structures can also be mounted on the chassis frame 10.

[0089] The chassis frame 10 is provided with the accommodating space 101, which refers to a space structure on the chassis frame 10 for accommodating the battery cell 30. The accommodating space 101 is a space structure provided on the chassis frame 10, and can be surrounded by part of the beam structure, plate structure or other structural members in the chassis frame 10. The accommodating space 101 can also be a space structure provided on the chassis frame 10.

[0090] The accommodating space 101 can be a prismatic space structure, a cylindrical space structure or other space structures. The accommodating space 101 is a space structure open at both sides, that is, the accommodating space 101 has two open sides, and the accommodating space 101 can be in communication with the space outside the accommodating space 101 through the open sides. The accommodating space 101 is a space structure penetrating through the chassis frame 10, and the two open sides of the accommodating space 101 can be provided at opposite sides of the accommodating space 101.

[0091] For example, the accommodating space 101 has one open side at each of the two sides in the height direction of the chassis 100, which are respectively referred to as the top open side and the bottom open side. Wherein the height direction of the chassis 100 is the height direction of the vehicle.

[0092] The fixed assembly 20 refers to a structure in the chassis 100 for providing a fixed base for the battery monomer 30, and the fixed assembly 20 can include a plate structure, a beam structure or other structural members; the shape of the fixed assembly 20 can be square, circular or other shapes, and the shape of the fixed assembly 20 can also be set according to the shape of the accommodation space 101; the material of the fixed assembly 20 can include metal, plastic or other materials.

[0093] The fixed assembly 20 is detachably connected to the chassis frame 10, and the fixed assembly 20 can be detachably connected to the chassis frame 10 by screwing, clamping or other means to facilitate the installation and disassembly of the staff.

[0094] The fixed assembly 20 can cover one open side of the accommodation space 101, or cover two open sides of the accommodation space 101 and separate the accommodation space 101 from the space outside the accommodation space 101, and the fixed assembly 20 can also be arranged in the accommodation space 101 and connected with the chassis frame 10. For example, the fixed assembly 20 covers two open sides of the accommodation space 101 respectively, at this time the fixed assembly 20 makes the accommodation space 101 form a closed space isolated from the external environment, so as to accommodate the battery monomer 30 and reduce the negative impact of the external environment on the battery monomer 30.

[0095] The battery monomer 30 refers to the smallest unit supporting the battery device, and the number of battery monomers 30 can be two, three or more; a plurality of battery monomers 30 can be arranged in one direction, or arranged in two different directions; a plurality of battery monomers 30 can be connected in series, parallel or mixed connection, and the mixed connection refers to that a plurality of battery monomers 30 are connected in series and in parallel. A plurality of battery monomers 30 can be directly connected in series, parallel or mixed connection, and then the whole of the plurality of battery monomers 30 is accommodated in the accommodation space 101; of course, the battery can also be in the form of a plurality of battery monomers 30 connected in series, parallel or mixed connection to form a battery module, and a plurality of battery modules are connected in series, parallel or mixed connection to form a whole and accommodated in the accommodation space 101.

[0096] The battery cell 30 is connected to the fixing assembly 20, and the battery cell 30 can be connected to the fixing assembly 20 by bonding, bonding, screwing or other means; the fixing assembly 20 is connected to the chassis frame 10, and the battery cell 30 is connected to the chassis frame 10 through the fixing assembly 20 to form an integrated structure; the battery cell 30 is accommodated in the accommodation space 101, at this time the fixing assembly 20 and the chassis frame 10 can serve as the external support structure of the battery cell 30 and form the box of the battery cell 30, without the need for additional frame structure. In such a setting, the chassis frame 10 can serve as both the frame structure in the chassis 100 and the frame structure of the battery device, i.e., the frame of the battery device is shared with the chassis frame 10, saving the frame structure of the battery device and improving the space utilization of the battery device.

[0097] In the case of needing to overhaul, repair or replace the battery cell 30, the worker only needs to disassemble the fixing assembly 20 to perform the overhaul and replacement work, reducing the difficulty of disassembling the battery cell 30.

[0098] In the embodiment, the accommodation space 101 is formed on the chassis frame 10, and the battery cell 30 is directly accommodated in the accommodation space 101, saving the frame structure of the battery device and reducing the space occupied by the saved frame structure, thereby improving the space utilization of the battery device; the fixing assembly 20 is detachably connected to the chassis frame 10, and the battery cell 30 is connected to the fixing assembly 20, so that the worker can directly disassemble the battery cell 30 from the chassis frame 10 by disassembling the fixing assembly 20, thereby simplifying the disassembly steps of the battery device and reducing the difficulty of disassembly and installation.

[0099] Reference Figure 4 、 Figure 6 In some embodiments, the fixing assembly 20 includes a top structure 21, which covers the open side of the accommodation space 101, and the top structure 21 is connected to the battery cell 30 to fix the battery cell 30 in the accommodation space 101; the top structure 21 is detachably connected to the chassis frame 10.

[0100] The top structure 21 refers to a structure in the fixing assembly 20 for providing a fixed basis for the battery cell 30, and the top structure 21 can include a plate structure, a beam structure or other structures, and the top structure 21 can also include a cold plate or other structures; the shape of the top structure 21 can be square, circular or other shapes, and the shape of the top structure 21 can also be set according to the shape of the accommodation space 101; the material of the top structure 21 can include metal, plastic or other materials.

[0101] The top structure 21 covers the open side of the accommodation space 101 to close the corresponding open side of the accommodation space 101 and prevent impurities in the external environment from entering the accommodation space 101 from the corresponding open side, thereby reducing the damage that impurities in the external environment can cause to the battery monomer 30. The top structure 21 can be located above the chassis frame 10, that is, the top structure 21 can be located on the side of the chassis frame 10 facing the inside of the vehicle 1000; the top structure 21 can also be located below the chassis frame 10, that is, the top structure 21 can also be located on the side of the chassis frame 10 facing the bottom of the vehicle 1000; for example, the top structure 21 is located above the chassis frame 10, and the top structure 21 covers the top open side of the accommodation space 101.

[0102] The top structure 21 is detachably connected to the chassis frame 10, and the top structure 21 can also be detachably connected to the chassis frame 10 by screwing, clamping, or other means to facilitate installation and disassembly by workers.

[0103] The battery monomer 30 is connected to the top structure 21, and the battery monomer 30 can be connected to the top structure 21 by bonding, welding, screwing, or other means to be connected to the chassis frame 10 through the top structure 21.

[0104] The embodiment provides some specific structures of the fixing assembly 20, so that the fixing assembly 20 includes the top structure 21 detachably connected to the chassis frame 10, and the battery monomer 30 is connected to the top structure 21, so that the worker can directly disassemble the battery monomer 30 from the chassis frame 10 by disassembling the top structure 21, thereby simplifying the disassembly steps of the battery device and reducing the difficulty of disassembly and installation.

[0105] Reference Figures 4 to 6 In some embodiments, the top structure 21 includes a carrier 211 and a top beam body 212, the carrier 211 covers the open side of the accommodation space 101, and the battery monomer 30 is connected to the carrier 211; the top beam body 212 is arranged on the side of the carrier 211 away from the battery monomer 30, and the top beam body 212 is detachably connected to the chassis frame 10.

[0106] The carrier 211 refers to a structure in the top structure 21 for carrying the battery monomer 30 and providing a fixed basis for the battery monomer 30, and the carrier 211 can be a plate structure, a beam structure, or other structures, and the carrier 211 can also be a cold plate or other structures; the shape of the carrier 211 can be square, circular, or other shapes, and the shape of the carrier 211 can also be set according to the shape of the accommodation space 101; the material of the carrier 211 can include metal, plastic, or other materials.

[0107] The carrier 211 covers the opening side of the accommodation space 101 to close the opening side of the corresponding accommodation space 101 and prevent impurities in the external environment from entering the accommodation space 101 from the corresponding opening side, thereby reducing the damage that impurities in the external environment can cause to the battery monomer 30.

[0108] According to the position of the top structure 21, the carrier 211 can be located above the chassis frame 10, that is, the carrier 211 can be located on the side of the chassis frame 10 facing the inside of the vehicle 1000; the carrier 211 can also be located below the chassis frame 10, that is, the carrier 211 can also be located on the side of the chassis frame 10 facing the bottom of the vehicle 1000; for example, the carrier 211 is located above the chassis frame 10.

[0109] The battery monomer 30 is connected to the carrier 211, and the battery monomer 30 can be connected to the carrier 211 by welding, bonding, screwing or other means.

[0110] The top beam body 212 refers to a structure in the top structure 21 for supporting the carrier 211, and the top beam body 212 can include one beam structure or two or more beam structures; the beam structure of the top beam body 212 can be an I-beam, a box beam or other shaped beam structure; the material of the top beam body 212 can include metal, plastic or other materials.

[0111] The top beam body 212 is connected to the carrier 211 and the chassis frame 10, so that the carrier 211 can be connected to the chassis frame 10 through the top beam body 212; the top beam body 212 can be connected to the carrier 211 by welding, screwing, bonding or other means; in addition to being able to indirectly connect the carrier 211 to the chassis frame 10, the top beam body 212 can also improve the strength and carrying capacity of the carrier 211, so that the carrier 211 can better provide a fixed base for the battery monomer 30.

[0112] The top beam body 212 is arranged on the side of the carrier 211 away from the battery monomer 30, so as to reduce the interference of the top beam body 212 on the arrangement of the battery monomer 30 and reduce the occupation of the arrangement space of the battery monomer 30 by the top beam body 212. According to the position of the carrier 211, the top beam body 212 can be located above the chassis frame 10, that is, the top beam body 212 can be located on the side of the chassis frame 10 facing the inside of the vehicle 1000; the top beam body 212 can also be located below the chassis frame 10, that is, the top beam body 212 can also be located on the side of the chassis frame 10 facing the bottom of the vehicle 1000; for example, the carrier 211 is located above the chassis frame 10, and at this time the top beam body 212 can serve as a fixed base for the seat of the vehicle 1000.

[0113] The top beam body 212 is detachably connected to the chassis frame 10. The top beam body 212 can be directly connected to the chassis frame 10 or indirectly connected to the chassis frame 10 through an intermediate structure. The top beam body 212 can be detachably connected to the chassis frame 10 by screwing, clamping or other means. The top beam body 212 can be connected to the chassis frame 10 on one side, or on both sides or multiple sides.

[0114] The embodiment provides specific structures of the top structure 21. The top structure 21 comprises the bearing member 211, so that the battery monomer 30 is borne by the bearing member 211. The top structure 21 comprises the top beam body 212, and the top beam body 212 is detachably connected to the chassis frame 10, so that the bearing member 211 is fixed by the top beam body 212. The top beam body 212 is directly detached from the chassis frame 10 by the worker, so that the battery monomer 30 can be detached from the chassis frame 10, and the difficulty of disassembling and assembling the battery device is further reduced.

[0115] Reference Figures 4 to 6 In some embodiments, the top beam body 212 comprises a first beam body 2121, and opposite sides of the first beam body 2121 are connected to different positions of the chassis frame 10 respectively. The length direction of the first beam body 2121 is perpendicular to the length direction of the chassis 100.

[0116] The first beam body 2121 is one of the top beam body 212. The first beam body 2121 can be an I-beam, a box beam or a beam structure of other shapes. The number of the first beam body 2121 can be one, two or more. The material of the first beam body 2121 can include metal, plastic or other materials.

[0117] The first beam body 2121 is connected to the bearing member 211 because the top beam body 212 is connected to the bearing member 211. The opposite sides of the first beam body 2121 are connected to different positions of the chassis frame 10 respectively, so that the first beam body 2121 can be more stably connected to the chassis frame 10, and the bearing member 211 can be more stably connected to the chassis frame 10.

[0118] The length direction of the first beam body 2121 is perpendicular to the length direction of the chassis 100. The length of the chassis 100 is the length direction of the vehicle 1000, and is also the direction in which the vehicle 1000 travels. The length direction of the first beam body 2121 is perpendicular to the length direction of the chassis 100, that is, the length direction of the first beam body 2121 is parallel to the width direction of the chassis 100. At this time, the first beam body 2121 can not only connect the bearing member 211 to the chassis frame 10, but also provide support for the chassis frame 10 in the width direction of the chassis 100, so as to improve the strength of the chassis frame 10.

[0119] For example, the first beam body 2121 is connected to the opposite sides of the chassis frame 10 along the length direction of the first beam body 2121, that is, the first beam body 2121 is connected to the two opposite rocker beams along the length direction of the first beam body 2121.

[0120] Since the top beam body 212 is detachably connected to the chassis frame 10, the first beam body 2121 is also detachably connected to the chassis frame 10; the first beam body 2121 can be detachably connected to the chassis frame 10 by screwing, clamping or other means; the first beam body 2121 can be directly connected to the chassis frame 10 or indirectly connected to the chassis frame 10 through an intermediate structure.

[0121] In the embodiment, the top beam body 212 includes the first beam body 2121, and the opposite sides of the first beam body 2121 are connected to different positions of the chassis frame 10, so that the first beam body 2121 can better fix the carrier 211 on the chassis frame 10.

[0122] Reference Figures 4 to 6 In some embodiments, the top beam body 212 further includes a second beam body 2122, one side of the second beam body 2122 is connected to the first beam body 2121, and the other side of the second beam body 2122 is connected to the chassis frame 10; the length direction of the second beam body 2122 is arranged at an angle with the length direction of the first beam body 2121.

[0123] The second beam body 2122 is one of the top beam body 212, the second beam body 2122 can be an I-beam, a box beam or other shaped beam structure, the number of the second beam body 2122 can be one, two or more; the material of the second beam body 2122 can include metal, plastic or other materials.

[0124] Since the top beam body 212 is connected to the carrier 211, the second beam body 2122 is connected to the carrier 211 to connect the carrier 211 to the chassis frame 10; one side of the second beam body 2122 is connected to the first beam body 2121, and the other side of the second beam body 2122 is connected to the chassis frame 10, so that the first beam body 2121 can be more stably connected to the chassis frame 10 through the second beam body 2122, thereby making the carrier 211 more stably connected to the chassis frame 10, and the second beam body 2122 can also improve the strength of the chassis frame 10.

[0125] The length direction of the first beam body 2121 and the length direction of the second beam body 2122 are arranged at an angle, and the length direction of the first beam body 2121 and the length direction of the second beam body 2122 can be perpendicular to each other or arranged at other angles. The arrangement enables the first beam body 2121 and the second beam body 2122 to provide support to the chassis frame 10 in different directions and to share the force on the load-bearing member 211 in different directions, so that the first beam body 2121 and the second beam body 2122 can better improve the strength of the chassis frame 10 and the load-bearing member 211.

[0126] In the case where the length direction of the first beam body 2121 is perpendicular to the length direction of the chassis 100, the second beam body 2122 can be perpendicular to the width direction of the chassis 100 and parallel to the length direction of the chassis 100, or the second beam body 2122 can extend in other directions.

[0127] In the embodiment, the top beam body 212 includes the second beam body 2122, and the length direction of the second beam body 2122 is arranged at an angle with the length direction of the first beam body 2121, so that the second beam body 2122 and the first beam body 2121 can be connected to different positions of the chassis frame 10 respectively, thereby further providing support to the load-bearing member 211 and improving the load-bearing capacity and strength of the load-bearing member 211.

[0128] Reference Figures 4 to 6 In some embodiments, the number of first beam bodies 2121 is at least two, and the at least two first beam bodies 2121 are arranged at intervals along the length direction of the chassis 100.

[0129] The number of first beam bodies 2121 can be two, or three or more, so that the first beam bodies 2121 can better improve the strength of the load-bearing member 211 and the chassis frame 10, and the load-bearing member 211 can be more stably connected to the chassis frame 10.

[0130] The at least two first beam bodies 2121 are arranged at intervals along the length direction of the chassis 100, so that each first beam body 2121 can share the force on the load-bearing member 211 at different positions, thereby improving the strength of the load-bearing member 211 at different positions; each first beam body 2121 can also be connected to different positions of the chassis frame 10, so that the load-bearing member 211 can be stably connected to the chassis frame 10, and the first beam body 2121 can share the force on the chassis frame 10 at different positions.

[0131] In the embodiment, the number of first beam bodies 2121 is two, so that each first beam body 2121 can better improve the strength and load-bearing capacity of the load-bearing member 211.

[0132] Reference Figure 4In some embodiments, the top structure 21 further comprises a connecting piece 213, one side of the connecting piece 213 is detachably connected to the first beam body 2121, and the other side of the connecting piece 213 is detachably connected to the chassis frame 10, so as to detachably connect the first beam body 2121 to the chassis frame 10.

[0133] The connecting piece 213 refers to a structure in the top structure 21 for connecting the first beam body 2121 and the chassis frame 10, one side of the connecting piece 213 is connected to the first beam body 2121, and the other side of the connecting piece 213 is connected to the chassis frame 10, so as to connect the first beam body 2121 to the chassis frame 10. In the case where the opposite sides of the first beam body 2121 are connected to the chassis frame 10 respectively, the opposite sides of the first beam body 2121 are both provided with the connecting piece 213. The connecting piece 213 can be a frame structure, or a plate-shaped structure or other shaped structure. The material of the connecting piece 213 can include metal, plastic or other materials.

[0134] One side of the connecting piece 213 is detachably connected to the first beam body 2121, so as to facilitate the installation, disassembly and replacement of the connecting piece 213. The connecting piece 213 can be detachably connected to the first beam body 2121 by screwing, clamping or other means.

[0135] The other side of the connecting piece 213 is detachably connected to the chassis frame 10, so as to facilitate the installation, disassembly and replacement of the connecting piece 213 and the first beam body 2121. The connecting piece 213 can be detachably connected to the chassis frame 10 by screwing, clamping or other means.

[0136] The provision of the connecting piece 213 can improve the strength of the connecting part of the first beam body 2121 and the chassis frame 10, and can improve the stability of the connection of the first beam body 2121 to the chassis frame 10, thereby improving the connection stability of the top structure 21 and enabling the top structure 21 to better provide a fixed base for the battery monomer 30.

[0137] According to different models of the chassis frame 10, different models of the connecting piece 213 can be provided to adapt to different models of the chassis frame 10. At this time, the first beam body 2121 can be provided as a general structure without changing for different models of the chassis frame 10, so as to facilitate the installation of the first beam body 2121 and can reduce the processing and design cost of the first beam body 2121.

[0138] In the present embodiment, the connecting piece 213 is provided, and the first beam body 2121 is detachably connected to the chassis frame 10 through the connecting piece 213, so as to facilitate the disassembly of the first beam body 2121 from the chassis frame 10 by the staff, thereby reducing the disassembly difficulty of the battery device. At the same time, the strength of the connecting part of the first beam body 2121 and the chassis frame 10 can be improved, so that the first beam body 2121 can be better installed on the chassis frame 10.

[0139] Reference Figure 4 In some embodiments, the top structure 21 further comprises a first sealing member 214, which is arranged between the carrier 211 and the chassis frame 10.

[0140] The first sealing member 214 refers to a structure in the top structure 21 for sealing the gap between the carrier 211 and the chassis frame 10. The first sealing member 214 can be a strip-shaped structure, or a square ring-shaped, circular ring-shaped or other shape structure. The number of the first sealing member 214 can be one, two or more. The material of the first sealing member 214 can include metal, plastic or other materials.

[0141] The first sealing member 214 can be connected to the carrier 211. The first sealing member 214 can be connected to the carrier 211 by welding, bonding or other means. The first sealing member 214 can also be connected to the chassis frame 10. The first sealing member 214 can be connected to the chassis frame 10 by welding, bonding or other means. The first sealing member 214 can also be placed between the carrier 211 and the chassis frame 10. In the case that the carrier 211 is connected to the chassis frame 10, the carrier 211 can press the first sealing member 214 against the chassis frame 10, so that the first sealing member 214 is clamped between the carrier 211 and the chassis frame 10, thereby achieving the fixation of the first sealing member 214.

[0142] The first sealing member 214 can seal the gap between the carrier 211 and the chassis frame 10, so that the gravel, dust, water or other impurities in the external environment are difficult to enter the accommodation space 101, thereby reducing the damage that the external environment may cause to the battery monomer 30, and better protecting the battery monomer 30.

[0143] In the present embodiment, the first sealing member 214 is arranged between the chassis frame 10 and the carrier 211 to prevent external impurities from entering the accommodation space 101, thereby reducing the damage that the external environment may cause to the battery monomer 30.

[0144] Reference Figure 4 In some embodiments, the carrier 211 comprises a heat exchange assembly.

[0145] The heat exchange assembly refers to a structure in the battery device for heat exchange with the battery monomer 30. The heat exchange assembly can control the temperature in the battery monomer 30 and the accommodation space 101, so that the battery monomer 30 can work in the required environmental temperature. The heat exchange assembly can be used to reduce the temperature in the battery monomer 30 and the accommodation space 101. The heat exchange assembly can also be used to increase the temperature in the battery monomer 30 and the accommodation space 101.

[0146] The carrier 211 comprises a heat exchange assembly, that is, the heat exchange assembly can not only control the temperature of the battery cell 30 and the containing space 101, but also provide a fixing base for the battery cell 30, and in this case, the battery cell 30 can be directly connected to the heat exchange assembly or indirectly connected to the heat exchange assembly through an intermediate structure.

[0147] In the case where the carrier 211 comprises the heat exchange assembly, the plate structure, beam structure or other structure for carrying the battery cell 30 can no longer be separately arranged in the top structure 21, and in this case, the heat exchange assembly can not only play a temperature control role, but also provide a fixing base for the battery cell 30, thereby saving the structure of the battery device and improving the space utilization of the battery device.

[0148] In the embodiment, the carrier 211 comprises the heat exchange assembly, which can not only control the temperature of the battery cell 30, but also provide a connection base for the battery cell 30, thereby improving the utilization of the heat exchange assembly; in the case where the battery cell 30 is directly connected to the heat exchange assembly, the structure for connecting the battery cell 30 is also saved, thereby further improving the space utilization of the battery device.

[0149] In some embodiments, the carrier 211 constitutes at least part of the floor structure of the chassis 100.

[0150] The floor structure of the chassis 100 refers to a structure in the chassis 100 for carrying passengers, seats, goods or other objects; according to the structure and area of the carrier 211, the carrier 211 can only be part of the floor structure, or the carrier 211 can be the entire floor structure.

[0151] In the embodiment, the carrier 211 is at least part of the floor structure, that is, the carrier 211 can not only provide a connection base for the battery cell 30, but also be at least part of the floor structure, thereby further improving the utilization of the carrier 211; at the same time, at least part of the floor structure is also saved, thereby further improving the space utilization of the battery device.

[0152] Reference Figure 2 , Figure 4 , Figure 5 In some embodiments, the battery cell 30 comprises a shell 31 and a pressure relief structure 34 arranged on the shell 31; the side of the shell 31 away from the pressure relief structure 34 is connected to the top structure 21.

[0153] The shell 31 refers to a component in the battery cell 30 for forming an internal environment of the battery cell 30, and the shape of the shell 31 can be cylindrical, prismatic or other shapes; the material of the shell 31 can include metal, plastic or other materials.

[0154] The pressure relief structure 34 refers to a structure in the battery monomer 30 that releases the internal pressure when the internal pressure or temperature of the battery monomer 30 reaches a threshold value. The pressure relief structure 34 can include a rupture disc, a rupture membrane, or other structures.

[0155] The side of the housing 31 away from the pressure relief structure 34 is connected to the top structure 21. When the top structure 21 is above the chassis 100, i.e., when the top structure 21 faces the interior of the vehicle 1000, this arrangement can invert the battery monomer 30, which can cause the pressure relief structure 34 to face away from the interior of the vehicle 1000. When high-temperature and high-pressure flue gas is discharged from the pressure relief structure 34 to the outside of the battery monomer 30, this arrangement can reduce the risk of high-temperature and high-pressure flue gas entering the interior of the vehicle 1000, thereby reducing the damage that high-temperature and high-pressure flue gas can cause to passengers, cargo, or other items in the interior of the vehicle 1000.

[0156] In this embodiment, the pressure relief structure 34 is arranged on the side of the battery monomer 30 away from the top structure 21 to reduce the interference of the top structure 21 with the gas released by the pressure relief structure 34. When the carrier 211 is at least part of the floor structure, this arrangement can also cause the pressure relief structure 34 to release gas in a direction away from the top structure 21, thereby improving safety performance.

[0157] Reference Figure 6 In some embodiments, the fixing assembly 20 further includes a bottom structure 22 that covers the open side of the accommodation space 101. The bottom structure 22 is connected to the battery monomer 30 to carry the battery monomer 30. The bottom structure 22 is detachably connected to the chassis frame 10.

[0158] The bottom structure 22 refers to a structure in the fixing assembly 20 that provides a fixed base for the battery monomer 30. The bottom structure 22 can include a plate structure, a beam structure, or other structures. The bottom structure 22 can also include a cold plate or other structures. The shape of the bottom structure 22 can be square, circular, or other shapes. The shape of the bottom structure 22 can also be arranged according to the shape of the accommodation space 101. The material of the bottom structure 22 can include metal, plastic, or other materials.

[0159] The bottom structure 22 covers the open side of the accommodating space 101 to close the corresponding open side of the accommodating space 101 and prevent impurities in the external environment from entering the accommodating space 101 from the corresponding open side, thereby reducing the damage that impurities in the external environment can cause to the battery monomer 30. The bottom structure 22 can be located below the chassis frame 10, that is, the bottom structure 22 can be located on the side of the chassis frame 10 facing the bottom of the vehicle 1000; the bottom structure 22 can also be located above the chassis frame 10, that is, the bottom structure 22 can be located on the side of the chassis frame 10 facing the inside of the vehicle 1000; for example, the bottom structure 22 is located below the chassis frame 10, and the bottom structure 22 covers the bottom open side of the accommodating space 101.

[0160] The bottom structure 22 is detachably connected to the chassis frame 10, and the bottom structure 22 can also be detachably connected to the chassis frame 10 by screwing, clamping or other means to facilitate installation and disassembly by workers.

[0161] The fixing assembly 20 can only include the bottom structure 22, and the fixing assembly 20 can also include the top structure 21 and the bottom structure 22; in the case where the fixing assembly 20 includes the top structure 21 and the bottom structure 22, the top structure 21 and the bottom structure 22 can be located on opposite sides of the battery monomer 30, respectively.

[0162] For example, the fixing assembly 20 includes the top structure 21 and the bottom structure 22, and at this time the top structure 21, the bottom structure 22 and the chassis frame 10 enclose the closed accommodating space 101 to separate the accommodating space 101 from the external environment outside the accommodating space 101.

[0163] For example, the fixing assembly 20 includes the top structure 21 and the bottom structure 22, and at this time the top structure 21 is located above the chassis frame 10 and also above the battery monomer 30, and the bottom structure 22 is located below the chassis frame 10 and also below the battery monomer 30.

[0164] The battery monomer 30 is connected to the bottom structure 22, and the battery monomer 30 can be connected to the bottom structure 22 by adhesion, welding, screwing or other means, and the battery monomer 30 can only contact the bottom structure 22 without being fixed by other structures, and at this time the bottom structure 22 can support and support the battery monomer 30. For example, in the case where the battery monomer 30 is connected to the top structure 21, the battery monomer 30 abuts against the bottom structure 22, and at this time the bottom structure 22 is mainly used to support the battery monomer 30 and provide support for the battery monomer 30.

[0165] The embodiment provides specific structures of the fixing assembly 20, so that the fixing assembly 20 comprises a bottom structure 22 detachably connected to the bottom frame 10, and the battery monomer 30 is connected to the bottom structure 22, so that the worker can directly detach the battery monomer 30 from the bottom frame 10 by detaching the bottom structure 22, the step of detaching the battery device is simplified, and the difficulty of detaching and installing is reduced.

[0166] Reference Figure 6 In some embodiments, the bottom structure 22 comprises a bottom guard plate 221, the battery monomer 30 is connected to the bottom guard plate 221, and the bottom guard plate 221 covers the opening side of the accommodation space 101 and is detachably connected to the bottom frame 10.

[0167] The bottom guard plate 221 refers to a structure in the bottom structure 22 for providing bottom protection for the battery monomer 30, and the bottom guard plate 221 can be a circular, square or other shaped structure; the shape of the bottom guard plate 221 can also be arranged according to the shape of the accommodation space 101; and the material of the bottom guard plate 221 can comprise metal, plastic or other materials.

[0168] The bottom guard plate 221 covers the opening side of the accommodation space 101, so as to close the opening side of the corresponding accommodation space 101 and hinder impurities in the external environment from entering the corresponding accommodation space 101 from the opening side, thereby reducing the damage of impurities in the external environment to the battery monomer 30.

[0169] According to the position of the bottom structure 22, the bottom guard plate 221 can be located below the bottom frame 10, that is, the bottom guard plate 221 can be located on the side of the bottom frame 10 facing the bottom of the vehicle 1000; the bottom guard plate 221 can also be located above the bottom frame 10, that is, the bottom guard plate 221 can be located on the side of the bottom frame 10 facing the inside of the vehicle 1000; for example, the bottom guard plate 221 is located below the bottom frame 10.

[0170] The embodiment provides specific structures of the bottom structure 22, so that the bottom structure 22 comprises the bottom guard plate 221, and the bottom guard plate 221 is detachably connected to the bottom frame 10, so as to facilitate the detachment and installation of the battery monomer 30.

[0171] Reference Figure 6 In some embodiments, the bottom structure 22 further comprises a support 222 connected to the bottom guard plate 221, and the support 222 abuts against the battery monomer 30.

[0172] The support 222 refers to a structure in the bottom structure 22 for supporting the battery monomer 30. The support 222 can be a strip-shaped structure, a block-shaped structure, or a structure of other shapes. The support 222 can be cylindrical, prismatic, or of other shapes. The number of supports 222 can be one, two, or more. The material of the support 222 can include metal, plastic, or other materials.

[0173] The support 222 is connected to the bottom guard plate 221. The support 222 can be connected to the bottom guard plate 221 by welding, bonding, screwing, or other means. The support 222 abuts against the battery monomer 30, that is, the support 222 is located on the side of the bottom guard plate 221 facing the battery monomer 30.

[0174] When the battery monomer 30 is connected to the top structure 21, the support 222 can abut against the battery monomer 30 to provide auxiliary support for the battery monomer 30, so that the battery monomer 30 can be better fixed between the top structure 21 and the bottom structure 22.

[0175] When the pressure relief structure 34 of the battery monomer 30 is located on the side of the battery monomer 30 away from the top structure 21, the pressure relief structure 34 of the battery monomer 30 faces the bottom structure 22. At this time, the support 222 is staggered with the pressure relief structure 34 to reduce interference with the pressure relief of the pressure relief structure 34. For example, the support 222 abuts against the shoulder of the battery monomer 30 to stagger with the pressure relief structure 34, and can also better transmit the supporting force to the shell 311.

[0176] In this embodiment, the support 222 is provided to support the battery monomer 30, so that the battery monomer 30 can be more stably connected to the bottom guard plate 221.

[0177] Reference Figure 6 In some embodiments, the bottom structure 22 further includes a second seal 223 provided between the bottom guard plate 221 and the bottom plate frame 10.

[0178] The second seal 223 refers to a structure in the bottom structure 22 for sealing the gap between the bottom guard plate 221 and the bottom plate frame 10. The second seal 223 can be a strip-shaped structure, a square ring-shaped structure, a circular ring-shaped structure, or a structure of other shapes. The number of second seals 223 can be one, two, or more. The material of the second seal 223 can include metal, plastic, or other materials.

[0179] The second sealing member 223 can be connected to the bottom guard plate 221, and the second sealing member 223 can be connected to the bottom guard plate 221 by welding, bonding or other means; the second sealing member 223 can also be connected to the bottom frame 10, and the second sealing member 223 can be connected to the bottom frame 10 by welding, bonding or other means; the second sealing member 223 can also be placed between the bottom guard plate 221 and the bottom frame 10, and in the case that the bottom guard plate 221 is connected to the bottom frame 10, the bottom guard plate 221 can press and hold the second sealing member 223 to the bottom frame 10, so that the second sealing member 223 is clamped between the bottom guard plate 221 and the bottom frame 10, thereby achieving the fixation of the second sealing member 223.

[0180] The second sealing member 223 can seal the gap between the bottom guard plate 221 and the bottom frame 10, so that the gravel, dust, water or other impurities in the external environment are difficult to enter the accommodation space 101, thereby reducing the damage that the external environment may cause to the battery monomer 30, and better protecting the battery monomer 30.

[0181] In the embodiment, the second sealing member 223 is arranged between the bottom frame 10 and the bottom guard plate 221 to hinder the external impurities from entering the accommodation space 101, thereby reducing the damage that the external environment may cause to the battery monomer 30.

[0182] In some embodiments, the bottom guard plate 221 also constitutes at least part of the protection structure of the bottom plate 100.

[0183] The protection structure of the bottom plate 100 refers to a structure for reducing the damage of road bumps, gravel and other impurities to the bottom plate 100, and the protection structure is located at the bottom of the bottom plate 100 and faces the road surface; the protection structure can include a plate structure, a beam structure or other structures.

[0184] As at least part of the protection structure, the bottom guard plate 221 can only be part of the protection structure according to the structure and area of the bottom guard plate 221, and the bottom guard plate 221 can also be completely the protection structure.

[0185] In the embodiment, the bottom guard plate 221 can provide a fixed base for the battery monomer 30 and also serve as the bottom protection structure of the vehicle 1000, thereby improving the utilization rate of the bottom guard plate 221, and also saving the structure for supporting the battery monomer 30 in the battery device, further improving the space utilization rate of the battery device.

[0186] Reference Figure 5 、 Figure 6 In some embodiments, the bottom plate 100 further comprises an internal beam body 23 connected to the bottom frame 10, at least part of the internal beam body 23 is accommodated in the accommodation space 101, and the internal beam body 23 divides the accommodation space 101 into at least two subspaces to accommodate different battery monomers 30.

[0187] The internal beam body 23 refers to a beam structure located inside the accommodation space 101. The internal beam body 23 can be an I-beam, a box beam, or other beam structures. The shape of the internal beam body 23 can be prismatic, cylindrical, or other shapes. The number of internal beam bodies 23 can be one, two, or more. The length direction of the internal beam body 23 can be parallel to the length direction of the chassis 100, or parallel to the width direction or other directions of the chassis 100. The material of the internal beam body 23 can include metal, plastic, or other materials.

[0188] The internal beam body 23 is connected to the chassis frame 10. The internal beam body 23 can be connected to the chassis frame 10 by welding, bonding, screwing, clamping, or other methods. The internal beam body 23 can be connected to the chassis frame 10 on one side, or on both sides or more sides.

[0189] The internal beam body 23 can provide support for adjacent battery monomers 30, and also share the force received on the chassis frame 10, thereby improving the strength of the chassis frame 10, so that the chassis frame 10 can better protect the battery monomers 30.

[0190] The internal beam body 23 can be connected to the fixed assembly 20, or spaced apart from the fixed assembly 20. In the case where the internal beam body 23 is connected to the fixed assembly 20, the internal beam body 23 can be connected to the fixed assembly 20 by bonding, welding, screwing, or other methods. The internal beam body 23 can also only abut the fixed assembly 20. In the case where the internal beam body 23 is connected to the fixed assembly 20, the internal beam body 23 can also improve the strength of the fixed assembly 20, so that the fixed assembly 20 can better provide a fixed basis for the battery monomers 30, and better protect the battery monomers 30.

[0191] The internal beam body 23 divides the accommodation space 101 into at least two subspaces. Different battery monomers 30 can be accommodated in different subspaces. According to the shape of the internal beam body 23 and the accommodation space 101, the subspaces can be prismatic spaces, cylindrical spaces, or other shaped space structures.

[0192] In the case of thermal runaway of a certain battery monomer 30, the internal beam body 23 can also hinder the spread of thermal runaway, thereby reducing the negative impact of the battery monomer 30 in thermal runaway on the battery monomers 30 in the adjacent subspaces.

[0193] During the installation, removal, or replacement of the battery monomers 30, the staff can also operate sequentially according to the subspaces.

[0194] In the embodiment, the internal beam body 23 is arranged to divide the accommodation space 101 by the internal beam body 23; meanwhile, the internal beam body 23 can improve the strength of the chassis frame 10 and provide support for the battery monomer 30.

[0195] In some embodiments, the internal beam body 23 is detachably connected to the chassis frame 10.

[0196] The internal beam body 23 is detachably connected to the chassis frame 10, and the internal beam body 23 can be directly connected to the chassis frame 10 or indirectly connected to the chassis frame 10 through an intermediate structure; the internal beam body 23 can be detachably connected to the chassis frame 10 by screwing, clamping or other means, and the internal beam body 23 can be connected to the chassis frame 10 on one side, two sides or multiple sides.

[0197] Since at least part of the internal beam body 23 is accommodated in the accommodation space 101, the internal beam body 23 can be connected to the side of the chassis frame 10 facing the accommodation space 101, and the internal beam body 23 can also be connected to the other side of the chassis frame 10.

[0198] In the embodiment, the internal beam body 23 is detachably connected to the chassis frame 10 to facilitate the disassembly and installation of the staff.

[0199] Reference Figure 5 、 Figure 6 In some embodiments, the internal beam body 23 includes a third beam body 231 detachably connected to the chassis frame 10, the length direction of the third beam body 231 is perpendicular to the length direction of the chassis 100, and the third beam body 231 abuts against the adjacent battery monomer 30.

[0200] The third beam body 231 is one of the internal beam bodies 23, the third beam body 231 can be an I-beam, a box beam or a beam structure of other shapes, the number of the third beam body 231 can be one, two or more; the material of the third beam body 231 can include metal, plastic or other materials.

[0201] The length direction of the third beam body 231 is perpendicular to the length direction of the chassis 100, wherein the length of the chassis 100 is the length direction of the vehicle 1000 and is also the direction in which the vehicle 1000 travels; the length direction of the third beam body 231 is perpendicular to the length direction of the chassis 100, that is, the length direction of the third beam body 231 is parallel to the width direction of the chassis 100, at this time, the third beam body 231 can not only connect the carrier 211 to the chassis frame 10, but also provide support for the chassis frame 10 in the width direction of the chassis 100, thereby improving the strength of the chassis frame 10.

[0202] For example, the third beam body 231 is connected to the opposite sides of the chassis frame 10 along the length direction of the third beam body 231, that is, the third beam body 231 is connected to the two opposite rocker beams along the length direction of the third beam body 231.

[0203] Since the inner beam body 23 is detachably connected to the chassis frame 10, the third beam body 231 is also detachably connected to the chassis frame 10. The third beam body 231 can be detachably connected to the chassis frame 10 by screwing, clamping or other means. The third beam body 231 can be directly connected to the chassis frame 10 or indirectly connected to the chassis frame 10 through an intermediate structure.

[0204] The third beam body 231 abuts against the adjacent battery monomers 30. The third beam body 231 can be located between the battery monomers 30, in which case the opposite sides of the third beam body 231 abut against the adjacent battery monomers 30. The third beam body 231 can also be located on one side of the battery monomers 30, in which case only one side of the third beam body 231 abuts against the adjacent battery monomers 30. Since the battery monomers 30 will swell and shrink during the charging and discharging cycle, the third beam body 231 abuts against the adjacent battery monomers 30 to restrain the deformation of the battery monomers 30 through the third beam body 231 and bear at least part of the force generated by the deformation of the battery monomers 30. At the same time, the third beam body 231 abutting against the adjacent battery monomers 30 can also fix the battery monomers 30.

[0205] In this embodiment, the inner beam body 23 includes the third beam body 231 to improve the strength of the chassis frame 10 through the third beam body 231, so that the chassis frame 10 can better protect the battery monomers 30. At the same time, the third beam body 231 abuts against the battery monomers 30, so that the third beam body 231 can also support the battery monomers 30 and restrain the deformation of the battery monomers 30.

[0206] Reference Figure 5 , Figure 6 In some embodiments, there are at least two third beam bodies 231, and the at least two third beam bodies 231 are spaced apart along the length direction of the chassis 100.

[0207] The number of third beam bodies 231 can be two, three or more, so that the third beam body 231 can better improve the strength of the chassis frame 10, and at the same time, the third beam body 231 can better restrain the deformation of the battery monomers 30. At the same time, this arrangement can better enable the third beam body 231 to bear and share the force generated by the swelling of the battery monomers 30, thereby reducing the risk of stress concentration.

[0208] At least two third beam bodies 231 are arranged at intervals along the length direction of the chassis 100, so that each third beam body 231 can respectively inhibit the deformation of different battery monomers 30 at different positions; at the same time, this arrangement can also improve the strength of the chassis frame 10 at different positions, and enable the third beam body 231 to share the force received by the chassis frame 10 at different positions.

[0209] In the embodiment, at least two third beam bodies 231 are provided to better improve the strength of the chassis frame 10 and better provide support for the battery monomers 30.

[0210] Reference Figure 5 , Figure 6 In some embodiments, the internal beam body 23 further comprises a fourth beam body 232, which is arranged on one side of the third beam body 231 along the length direction of the chassis 100; one side of the fourth beam body 232 is detachably connected to the chassis frame 10, and the other side of the fourth beam body 232 is connected to the adjacent third beam body 231.

[0211] The fourth beam body 232 is one of the internal beam bodies 23, and the fourth beam body 232 can be an I-beam, a box beam or other shaped beam structure. The number of fourth beam bodies 232 can be one, two or more. The material of the fourth beam body 232 can include metal, plastic or other materials.

[0212] Since the internal beam body 23 is connected to the chassis frame 10, the fourth beam body 232 is connected to the chassis frame 10; one side of the fourth beam body 232 is connected to the third beam body 231, and the other side of the fourth beam body 232 is connected to the chassis frame 10, so that the third beam body 231 can be more stably connected to the chassis frame 10 through the fourth beam body 232, to improve the strength of the third beam body 231, so that the third beam body 231 can better inhibit the deformation of the battery monomer 30 and provide support for the battery monomer 30; at the same time, the fourth beam body 232 can also improve the strength of the chassis frame 10.

[0213] For example, when the number of third beam bodies 231 is three or more, one or two third beam bodies 231 located at the outermost side of each battery monomer 30 are connected with the fourth beam body 232, that is, the two sides of the fourth beam body 232 are not arranged with the battery monomer 30, and the fourth beam body 232 is located between the battery monomers 30 to reduce the occupation of the fourth beam body 232 to the arrangement space of the battery monomers 30.

[0214] The fourth beam body 232 is detachably connected to the chassis frame 10. The fourth beam body 232 can be detachably connected to the chassis frame 10 by screwing, clamping or other means. The fourth beam body 232 can be directly connected to the chassis frame 10 or indirectly connected to the chassis frame 10 through an intermediate structure.

[0215] The fourth beam body 232 is detachably connected to the chassis frame 10. The fourth beam body 232 can be detachably connected to the chassis frame 10 by screwing, clamping or other means. The fourth beam body 232 can be directly connected to the chassis frame 10 or indirectly connected to the chassis frame 10 through an intermediate structure.

[0216] In the embodiment, the inner beam body 23 includes the fourth beam body 232, and the fourth beam body 232 is connected to the chassis frame 10 and the third beam body 231 respectively, so as to improve the connection stability of the third beam body 231 through the fourth beam body 232 and improve the strength of the third beam body 231. Meanwhile, the arrangement of the fourth beam body 232 can also improve the strength of the chassis frame 10.

[0217] Reference Figure 5 , Figure 6 In some embodiments, the third beam body 231 is connected with at least two fourth beam bodies 232.

[0218] The number of the fourth beam bodies 232 arranged on one third beam body 231 can be two, three or more, so that the fourth beam bodies 232 can better improve the strength of the third beam body 231 and the chassis frame 10, and the third beam body 231 can be more stably connected to the chassis frame 10.

[0219] The arrangement of at least two fourth beam bodies 232 on one third beam body 231 can make each fourth beam body 232 share the force on the third beam body 231 at different positions, so as to improve the strength of the third beam body 231 at different positions. Each fourth beam body 232 can also be connected to different positions of the chassis frame 10, so that the fourth beam body 232 can share the force on the chassis frame 10 at different positions, thereby better improving the strength of the chassis frame 10.

[0220] In the embodiment, at least two fourth beam bodies 232 are connected to one third beam body 231, so that the fourth beam bodies 232 can better improve the strength of the third beam body 231 and the chassis frame 10.

[0221] Reference Figures 4 to 6 In some embodiments, the chassis 100 further includes a control device 40 connected to the top structure 21.

[0222] The control device 40 refers to a structure on the chassis 100 for controlling the charging and discharging state of each battery monomer 30 and collecting the state information of each battery monomer 30; the control device 40 is arranged on the top structure 21 so as to facilitate the control device 40 to collect and control the working state of the battery monomer 30.

[0223] In some embodiments, the chassis 100 comprises a chassis frame 10, a fixing assembly 20, a battery monomer 30 and an internal beam body 23; wherein the fixing assembly 20 comprises a top structure 21 and a bottom structure 22.

[0224] The chassis frame 10 is provided with an accommodating space 101 penetrating from top to bottom, and the battery monomer 30 is accommodated in the accommodating space 101.

[0225] The top structure 21 comprises a bearing 211, which is located above the chassis frame 10 and covers an opening of the accommodating space 101, the bearing 211 is detachably connected to the chassis frame 10, the bearing 211 is a heat exchange assembly, and the bearing 211 is at least part of the floor structure of the chassis 100.

[0226] The side of the bearing 211 away from the battery monomer 30 is provided with a first beam body 2121 and a second beam body 2122, the length direction of the first beam body 2121 is parallel to the width direction of the chassis 100, and the two sides of the first beam body 2121 are respectively detachably connected to two rocker beams of the chassis frame 10, and the first beam body 2121 can serve as a seat beam of the vehicle 1000; the length direction of the second beam body 2122 is parallel to the length direction of the chassis 100, one side of the second beam body 2122 is connected to the first beam body 2121, and the other side of the second beam body 2122 is detachably connected to the chassis frame 10, and the second beam body 2122 can serve as a central channel beam of the vehicle 1000.

[0227] The bottom structure 22 comprises a bottom guard plate 221, which is located below the chassis frame 10 and covers the other opening of the accommodating space 101, the bottom guard plate 221 is detachably connected to the chassis frame 10, and the bottom guard plate 221 is at least part of the protection structure of the chassis 100.

[0228] The chassis frame 10, the bearing 211 and the bottom guard plate 221 form a box structure of the battery monomer 30, wherein the chassis frame 10 serves as a frame of the box structure, and the bearing 211 and the bottom guard plate 221 serve as a top plate and a bottom plate of the box structure respectively. Meanwhile, the chassis frame 10, the bearing 211 and the bottom guard plate 221 also serve as a frame structure, a floor structure and a protection structure in the chassis 100 respectively; that is, the chassis frame 10, the bearing 211 and the bottom guard plate 221 have different functions at the same time, which improves the utilization efficiency of the structure, saves part of the structure and reduces the space occupation of the battery device.

[0229] The third beam body 231 is arranged in the accommodating space 101, the length direction of the third beam body 231 is parallel to the width direction of the chassis 100, and the two sides of the third beam body 231 are respectively detachably connected to the rocker panel beams of the chassis frame 10; the third beam body 231 abuts against the battery monomer 30 to serve as an expansion beam. The fourth beam body 232 is connected to the third beam body 231, the length direction of the fourth beam body 232 is parallel to the length direction of the chassis 100, and the side of the fourth beam body 232 away from the third beam body 231 is detachably connected to the chassis frame 10.

[0230] In a second aspect, the application also provides a vehicle 1000 comprising the chassis 100 provided in the first aspect.

[0231] In such a vehicle 1000, the battery monomer 30 is more convenient to install and disassemble, the space utilization of the chassis 100 is higher, the energy density of the battery device on the chassis 100 is greater, and the weight of the chassis 100 can be lighter.

[0232] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; 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 application, and they should be covered in the scope of the claims and the specification of the application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A chassis, characterized in that The application relates to a battery pack, comprising: a chassis frame forming a two-side open and through accommodating space; a plurality of battery cells accommodated in the accommodating space; a fixing assembly detachably connected to the chassis frame and the battery cells to fix the battery cells in the accommodating space.

2. The base pan of claim 1, wherein, The fixing assembly comprises a top structure covering the open side of the accommodating space, and the top structure is connected to the battery cells to fix the battery cells in the accommodating space. The top structure is detachably connected to the chassis frame.

3. The base pan of claim 2, wherein, The top structure comprises a carrier covering the open side of the accommodating space, and the battery cells are connected to the carrier. A top beam body is arranged on the side of the carrier away from the battery cells, and the top beam body is detachably connected to the chassis frame.

4. The base pan of claim 3, wherein, The top beam body comprises a first beam body, and opposite sides of the first beam body are connected to different positions of the chassis frame, and the length direction of the first beam body is perpendicular to the length direction of the chassis.

5. The base pan of claim 4, wherein, The top beam body further comprises a second beam body, one side of the second beam body is connected to the first beam body, and the other side of the second beam body is connected to the chassis frame. The length direction of the second beam body is arranged at an angle with the length direction of the first beam body.

6. A chassis according to claim 4 or 5, characterised in that, The number of the first beam bodies is at least two, and the at least two first beam bodies are arranged at intervals along the length direction of the chassis.

7. The chassis according to any one of claims 4-6, characterized in that, The top structure further comprises a connecting piece, one side of the connecting piece is detachably connected to the first beam body, and the other side of the connecting piece is detachably connected to the chassis frame to detachably connect the first beam body to the chassis frame.

8. The chassis according to any one of claims 3-7, characterized in that, The top structure further comprises a first sealing piece arranged between the carrier and the chassis frame.

9. The chassis according to any one of claims 3-8, characterized in that, The carrier comprises a heat exchange assembly.

10. The chassis according to any one of claims 3-9, characterized in that, The carrier constitutes at least part of a floor structure of the chassis.

11. The chassis according to any one of claims 2-10, characterized in that, The battery cell comprises a shell and a pressure relief structure arranged on the shell. One side of the shell away from the pressure relief structure is connected to the top structure.

12. The chassis of any one of claims 2-11, wherein, The fixing assembly further comprises a bottom structure covering the open side of the accommodating space, and the bottom structure is connected to the battery cells to support the battery cells. The bottom structure is detachably connected to the chassis frame.

13. The base pan of claim 12, wherein, The bottom structure comprises a bottom guard plate, the battery cells are connected to the bottom guard plate, the bottom guard plate covers the open side of the accommodating space and is detachably connected to the chassis frame.

14. The base pan of claim 13, wherein, The bottom structure further comprises a supporting piece connected to the bottom guard plate and abutting against the battery cells.

15. A chassis according to claim 13 or 14, characterised in that, The bottom structure further comprises a second sealing piece arranged between the bottom guard plate and the chassis frame.

16. The chassis according to any one of claims 13-15, characterized in that, The bottom guard plate further constitutes at least part of a protection structure of the chassis.

17. The chassis of any one of claims 1-16, wherein, The chassis further comprises an internal beam body connected to the chassis frame, at least part of the internal beam body is accommodated in the accommodating space, and the internal beam body divides the accommodating space into at least two subspaces to accommodate different battery cells.

18. The base pan of claim 17, wherein, The internal beam body is detachably connected to the chassis frame.

19. The chassis of claim 17 or 18, wherein, The internal beam body comprises a third beam body detachably connected to the chassis frame, the length direction of the third beam body is perpendicular to the length direction of the chassis, and the third beam body abuts against adjacent battery monomers.

20. The base pan of claim 19, wherein, The third beam body has at least two, and the at least two third beam bodies are arranged at intervals along the length direction of the chassis.

21. A chassis according to claim 19 or 20, characterised in that, The internal beam body further comprises a fourth beam body, and the fourth beam body is arranged on one side of the third beam body along the length direction of the chassis. One side of the fourth beam body is detachably connected to the chassis frame, and the other side of the fourth beam body is connected to adjacent third beam bodies.

22. The base pan of claim 21, wherein, The third beam body is connected with at least two fourth beam bodies.

23. The chassis of any one of claims 2-16, wherein, The chassis further comprises a control device connected to the top structure.

24. A vehicle characterized by A battery pack comprising the chassis as claimed in any one of claims 1-23.

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