Vehicle body and electric vehicle

Abstract

A vehicle body (100) and an electric vehicle (1000). The vehicle body (100) comprises a battery frame body (110) and a rocker panel (120); the battery frame body (110) is provided with an accommodating cavity (113) for accommodating a battery cell; the battery frame body (110) comprises a first supporting beam (111) arranged on one side of the vehicle body (100) in the width direction; the rocker panel (120) is mounted on the first supporting beam (111).

Description

Car body and electric vehicles

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202322112801.4, filed on August 7, 2023, entitled “Car Body and Electric Vehicle”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application belongs to the field of automobile technology, and more specifically, relates to a vehicle body and an electric vehicle. Background Art

[0004] With the rapid development of new energy technologies, electric vehicles are becoming increasingly popular. Electric vehicles consist of a vehicle body and a battery. However, due to the heavy weight of the vehicle body and the limited internal space for the battery, the range of electric vehicles has been significantly reduced, seriously hindering their promotion. Therefore, improving the range of electric vehicles is a pressing technical issue that needs to be addressed.

[0005] Summary of the Invention

[0006] One of the purposes of the embodiments of the present application is to provide a vehicle body and an electric vehicle, aiming to solve the technical problem of poor endurance performance of electric vehicles.

[0007] To solve the above technical problems, the technical solutions adopted in the embodiments of the present application are:

[0008] In a first aspect, a vehicle body is provided, comprising a battery frame and a sill beam, wherein the battery frame has a cavity for accommodating a battery cell, and the battery frame comprises a first support beam arranged on one side of the vehicle body along the width direction; the sill beam is mounted on the first support beam.

[0009] The vehicle body provided by the embodiment of the present application has at least the following beneficial effects: the vehicle body provided by the embodiment of the present application effectively improves the bending and torsional stiffness of the vehicle body by installing the sill beam on the first support beam of the battery frame, so that the sill beam and the first support beam are connected into a whole. In this way, not only can the thickness of the sill beam be reduced to a certain extent to reduce the weight of the sill beam, but there is no need for additional connecting components for connecting the battery frame and the sill beam, thereby effectively reducing the weight of the vehicle body. At the same time, the battery frame can make full use of the width space of the vehicle body, thereby effectively increasing the space of the cavity, so that the cavity can accommodate more battery cells, thereby effectively improving the endurance performance of the electric vehicle.

[0010] In some embodiments of the present application, the first support beam includes a first beam body and a first support seat, the first support seat is connected to the side of the first beam body facing away from the cavity or the side facing the cavity, and the threshold beam includes a second beam body, and the second beam body is installed on the first support seat.

[0011] By adopting the above technical solution, it is convenient to install the threshold beam on the first support beam.

[0012] In some embodiments of the present application, the second beam is installed on the bottom side of the first support seat facing away from the vehicle body, and the second beam is fixed to the first support seat by welding, bonding and / or via fixing members.

[0013] By adopting the above technical solution, the overall width formed by the connection between the door sill beam and the first support beam can be reduced, so that the battery frame can more fully utilize the width space of the vehicle body, further increasing the space of the cavity, so that the cavity can accommodate more battery cells, thereby further improving the endurance performance of the electric vehicle.

[0014] In some embodiments of the present application, the threshold beam further includes a connecting member protruding from a side of the second beam body facing the first beam body, and the connecting member is connected to the first beam body.

[0015] By adopting the above technical solution, the second beam body of the sill beam is installed on the first support seat, and the connecting member of the sill beam is connected to the first beam body, which effectively improves the connection strength between the sill beam and the first support beam, thereby further improving the bending and torsional stiffness of the vehicle body.

[0016] In some embodiments of the present application, the connecting member is a plate member, and the connecting member is connected to the first beam body by welding, bonding and / or via a fixing member.

[0017] By adopting the above technical solution, the weight of the door sill beam is effectively reduced, and the weight of the vehicle body is further reduced, thereby further improving the endurance performance of the electric vehicle. At the same time, the height space of the vehicle body occupied by the connecting parts can be reduced, making the structure of the vehicle body more compact.

[0018] In some embodiments of the present application, the connecting member is connected to a side of the first beam that faces away from the bottom of the vehicle body.

[0019] By adopting the above technical solution, the overall width formed by the connection between the door sill beam and the first support beam can be reduced, so that the battery frame can more fully utilize the width space of the vehicle body, further increasing the space of the cavity, so that the cavity can accommodate more battery cells, thereby further improving the endurance performance of the electric vehicle.

[0020] In some embodiments of the present application, a height of a side of the first beam facing away from the bottom of the vehicle body is greater than a height of a side of the first support base facing away from the bottom of the vehicle body.

[0021] By adopting the above technical solution, the height of the whole formed by the door sill beam and the first support beam can be reduced, making the structure of the vehicle body more compact.

[0022] In some embodiments of the present application, the vehicle body further includes a floor mounted on the first support beam and used to seal the cavity.

[0023] By adopting the above technical solution, the floor of the vehicle body is used as a battery cover to seal the cavity, which eliminates the need for an additional battery cover, further reducing the weight of the vehicle body and thus further improving the endurance performance of the electric vehicle.

[0024] In some embodiments of the present application, the first support beam includes a first beam body, a first support seat connected to the side of the first beam body facing away from the cavity, and a second support seat connected to the side of the first beam body facing the cavity. The threshold beam includes a second beam body, the second beam body is installed on the first support seat, and the floor is installed on the second support seat.

[0025] By adopting the above technical solution, it is convenient to install the threshold beam and the floor on the first support beam, and effectively achieve the purpose of sealing the cavity of the battery frame through the floor.

[0026] In some embodiments of the present application, a pre-positioning structure is provided between the second support base and the floor.

[0027] By adopting the above technical solution, before the floor is connected to the second support seat, the floor can be pre-fixed on the second support seat through the pre-positioning structure, which facilitates the connection operation between the second support seat and the floor, thereby effectively improving the assembly efficiency of the vehicle body.

[0028] In some embodiments of the present application, the pre-positioning structure includes a convex portion and a concave portion; the convex portion is arranged on the floor, and the concave portion is arranged on the second support seat; or, the convex portion is arranged on the second support seat, and the concave portion is arranged on the floor; the convex portion and the concave portion are plugged into each other.

[0029] By adopting the above technical solution, the floor is effectively pre-fixed on the second support seat before the connection operation between the floor and the second support seat is performed. In addition, the structure is simple, and the manufacturing cost of the vehicle body is effectively reduced.

[0030] In some embodiments of the present application, the vehicle body further includes a first isolation layer body, which is disposed between the first support beam and the floor; and / or the vehicle body further includes a first seal, which is disposed between the first support beam and the floor.

[0031] By adopting the above technical solution, the first isolation layer can separate the first support beam from the floor, effectively improving the modal performance of the vehicle body, thereby effectively improving the situation of abnormal noise caused by the contact and friction between the first support beam and the floor. By arranging the first sealing member between the first support beam and the floor, the situation of foreign objects such as dust and water vapor entering the cavity is effectively improved, the sealing performance of the vehicle body is effectively improved, and the safety performance of the electric vehicle is effectively improved.

[0032] In some embodiments of the present application, the vehicle body further includes a supporting plate, and the supporting plate is covered on a side of the frame facing away from the floor.

[0033] By adopting the above technical solution, the battery frame, floor and supporting plate are jointly enclosed to form a cavity, which effectively protects the battery cells.

[0034] In some embodiments of the present application, the vehicle body further includes a second isolation layer body, which is disposed between the first support beam and the sill beam; and / or the vehicle body further includes a second sealing member, which is disposed between the first support beam and the sill beam.

[0035] By adopting the above technical solution, the second isolation layer can separate the first support beam from the door sill beam, effectively improving the modal performance of the vehicle body, thereby effectively improving the situation where abnormal noise is emitted due to the contact and friction between the first support beam and the door sill beam. By arranging the second sealing member between the first support beam and the door sill beam, the situation where foreign objects such as dust and water vapor enter the cavity is effectively improved, the sealing performance of the vehicle body is effectively improved, and thus the safety performance of the electric vehicle is effectively improved.

[0036] An embodiment of the present application also provides an electric vehicle, comprising the vehicle body described in any of the above embodiments.

[0037] The electric vehicle provided by the embodiments of the present application has at least the following beneficial effects: the electric vehicle provided by the embodiments of the present application effectively improves the endurance performance of the electric vehicle due to the adoption of the vehicle body described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] FIG1 is a schematic structural diagram of an electric vehicle provided in an embodiment of the present application;

[0040] FIG2 is a schematic structural diagram of a vehicle body provided in an embodiment of the present application;

[0041] FIG3 is a schematic diagram of the exploded structure of the vehicle body shown in FIG2 ;

[0042] FIG4 is a schematic side structural diagram of the vehicle body shown in FIG2 ;

[0043] FIG5 is a schematic cross-sectional view of the vehicle body shown in FIG4 along line AA;

[0044] FIG6 is an enlarged structural diagram of point B of the vehicle body shown in FIG5 .

[0045] Reference numerals in the figures are as follows: 1000, electric vehicle; s00, vehicle body; 110, battery frame; 111, first support beam; 1111, first beam body; 1112, first support seat; 1113, second support seat; 112, second support beam; 1121, third beam body; 1122, third support seat; 113, cavity; 120, threshold beam; 121, second beam body; 122, connector; 130, floor; 140, support plate; 150, pre-positioning structure; 151, protrusion; 152, recess; 160, first isolation layer; 170, first sealing member; 180, second isolation layer; 190, second sealing member; 200, battery; 300, electric drive device. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0047] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0048] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0050] An electric vehicle is a vehicle that relies on electricity for all or part of its operation. It consists of a vehicle body, a battery, and an electric drive unit. The battery is typically mounted on the bottom of the vehicle, while the electric drive unit is typically installed at the front or rear of the vehicle. The battery provides electrical energy to the electric drive unit, which converts this electrical energy into mechanical energy to propel the vehicle.

[0051] In related technologies, a battery usually includes a box and battery cells. The battery cells are housed in the box, and the box is connected to the door sill of the vehicle body through a connecting bracket. However, since the connecting bracket requires more space, the internal space of the box will be reduced, which in turn will reduce the number of battery cells that the box can accommodate. Moreover, the connecting bracket is heavy, which will increase the weight of the vehicle body. In addition, in order to improve the bending and torsional stiffness of the vehicle body, it is usually necessary to thicken the door sill of the vehicle body, but this will cause the weight of the vehicle body to further increase, thereby significantly reducing the endurance performance of the electric vehicle.

[0052] In order to improve the endurance performance of electric vehicles, the vehicle body provided in the embodiment of the present application installs the door sill beam on the first support beam of the battery frame, so that the door sill beam and the first support beam are connected into a whole, thereby effectively improving the bending and torsional stiffness of the vehicle body. In this way, not only can the thickness of the door sill beam be reduced to a certain extent to reduce the weight of the door sill beam, but there is no need for additional connecting components for connecting the battery frame and the door sill beam, thereby effectively reducing the weight of the vehicle body. At the same time, the battery frame can make full use of the width space of the vehicle body, thereby effectively increasing the space of the cavity, so that the cavity can accommodate more battery cells, thereby effectively improving the endurance performance of the electric vehicle.

[0053] The electric vehicle 1000 disclosed in the embodiments of this application can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range vehicle. The electric vehicle 1000 can also be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. Referring to FIG. 1 , FIG. 1 is a schematic diagram of the structure of the electric vehicle 1000 provided in the embodiments of this application. The electric vehicle 1000 includes a vehicle body 100, a battery 200, and an electric drive unit 300.

[0054] The vehicle body 100 is the main supporting component of the electric vehicle 1000. The vehicle body 100 has an engine compartment and a driver's compartment. The engine compartment is used to accommodate the electric drive device 300, transmission device, cooling device, etc. of the electric vehicle 1000, and the driver's compartment is used to provide operating space and seating space for the driver and passengers. When the electric vehicle 1000 is a front-wheel drive vehicle, the engine compartment is located at the front of the vehicle body 100, that is, the engine compartment is the front engine compartment. When the electric vehicle 1000 is a rear-wheel drive vehicle, the engine compartment is located at the rear of the vehicle body 100, that is, the engine compartment is the rear engine compartment. When the electric vehicle 1000 is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the vehicle body 100 and the rear engine compartment located at the rear of the vehicle body 100. The driver's compartment is located between the front and rear of the vehicle body 100.

[0055] The battery 200 is used to provide electrical energy to the electric drive unit 300. The battery 200 can be installed at the bottom of the vehicle body 100. For example, the battery 200 is installed below the cockpit of the vehicle body 100. The battery 200 includes battery cells. There can be multiple battery cells, and the multiple battery cells can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that the multiple battery cells are connected in both series and parallel. The multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the multiple battery cells are assembled into a whole and installed on the vehicle body 100. Of course, the battery 200 can also be a battery module composed of multiple battery cells that are first connected in series, in parallel, or in a hybrid connection, and the multiple battery modules are then connected in series, in parallel, or in a hybrid connection to form a whole and installed on the vehicle body 100. The battery 200 can also include other functional components. For example, the battery 200 can also include a busbar component that is used to achieve electrical connection between the multiple battery cells.

[0056] Each battery cell may be a secondary battery or a primary battery. A secondary battery refers to a battery cell that can be recharged to activate the active material after the battery cell is discharged and can continue to be used. A primary battery refers to a battery cell that cannot be recharged to activate the active material after the battery cell's power is exhausted and can continue to be used. The battery cell may also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but is not limited thereto. The battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery cells. Polygonal prismatic battery cells are, for example, hexagonal battery cells, etc. This application does not have any special restrictions.

[0057] The electric drive device 300 is used to convert the electrical energy provided by the battery 200 into mechanical energy and output this mechanical energy to the wheels of the electric vehicle 1000 to drive the electric vehicle 1000. Of course, if the electric vehicle 1000 has a kinetic energy recovery function, the electric drive device 300 can also act as a generator to convert mechanical energy into electrical energy and transmit and store the generated electrical energy in the battery 200. The electric drive device 300 is installed in the cabin. Specifically, when the electric vehicle 1000 is a front-wheel drive vehicle, the electric drive device 300 is installed at the front of the electric vehicle 1000 and is used to output the above-mentioned mechanical energy to the front wheels of the electric vehicle 1000 to drive the electric vehicle 1000 to travel; when the electric vehicle 1000 is a rear-wheel drive vehicle, the electric drive device 300 is installed at the rear of the electric vehicle 1000 and is used to output the above-mentioned mechanical energy to the rear wheels of the electric vehicle 1000 to drive the electric vehicle 1000 to travel; when the electric vehicle 1000 is a four-wheel drive vehicle, there can be two electric drive devices 300, one electric drive device 300 is installed at the front of the electric vehicle 1000 and is used to output the above-mentioned mechanical energy to the front wheels of the electric vehicle 1000, and the other electric drive device 300 is installed at the rear of the electric vehicle 1000 and is used to output the above-mentioned mechanical energy to the rear wheels of the electric vehicle 1000 to drive the electric vehicle 1000 to travel.

[0058] The vehicle body 100 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0059] In the first aspect, please refer to Figures 2 to 6 together. An embodiment of the present application provides a vehicle body 100, including a battery frame 110 and a door sill beam 120. The battery frame 110 has a cavity 113 for accommodating a battery cell. The battery frame 110 includes a first support beam 111 arranged on one side of the vehicle body 100 along the width direction, and the door sill beam 120 is installed on the first support beam 111.

[0060] For the convenience of description below, a direction parallel to the axial direction of the wheel is defined as the width direction of the vehicle body 100. It should be noted that the above-mentioned axial direction refers to the axial direction of the wheel when the electric vehicle 1000 is traveling along any straight line, such as the X direction shown in Figures 1, 2, 3 and 5. A direction perpendicular to the above-mentioned axial direction and parallel to the support plane of the electric vehicle 1000 is defined as the length direction of the vehicle body 100. It should be noted that the above-mentioned support plane refers to a plane tangent to the wheel surface on the side facing away from the vehicle body 100 of all wheels of the electric vehicle 1000 when the electric vehicle 1000 is in a traveling state or a stationary state, such as the Y direction shown in Figures 1 to 4. A direction perpendicular to the above-mentioned width direction and the above-mentioned length direction is defined as the height direction of the vehicle body 100, such as the Z direction shown in Figures 2 to 5. The two sides of the body 100 along its width direction are the left side and the right side of the body 100, the two sides of the body 100 along its length direction are the front side and the rear side of the body 100, and the two sides of the body 100 along its height direction are the bottom and the top of the body 100, wherein the bottom is the part of the body 100 close to the above-mentioned support plane, and the top is the part of the body 100 away from the above-mentioned support plane.

[0061] The battery frame 110 is a component used to provide an environment for mounting and supporting battery cells. It is understood that the battery frame 110 is made of a rigid material, which may include, but is not limited to, aluminum, aluminum alloys, iron, stainless steel, and the like. A first support beam 111 is a supporting component of the battery frame 110. Two first support beams 111 may be provided, one located on the left side of the vehicle body 100 and the other located on the right side. It is understood that the width of the first support beam 111 along the vehicle body 100 is smaller than the length of the first support beam 111 along the vehicle body 100. For example, the first support beam 111 may be a straight structure extending along the length of the vehicle body 100, or it may be a curved structure extending in a zigzag manner along the length of the vehicle body 100. In some embodiments, to reduce the weight of the battery frame 110, the first support beam 111 may be hollow, i.e., a cavity may be formed within the first support beam 111.

[0062] The battery frame 110 may further include a second support beam 112 connected between the two first support beams 111. The second support beam 112 is another supporting component of the battery frame 110. The number of second support beams 112 may be two, and the two second support beams 112 are spaced apart along the length of the vehicle body 100. The two first support beams 111 and the two second support beams 112 enclose the aforementioned cavity 113. It is understood that the dimension of the second support beam 112 along the length of the vehicle body 100 is smaller than the dimension of the second support beam 112 along the width of the vehicle body 100. For example, the second support beam 112 has a straight structure and extends along the width of the vehicle body 100. For another example, the second support beam 112 has a curved structure and extends in a zigzag manner along the width of the vehicle body 100. In some embodiments, to reduce the weight of the battery frame 110, the second support beam 112 may have a hollow structure, that is, a cavity is formed inside the second support beam 112. In some embodiments, the battery frame 110 may be an integrally formed component, for example, the two first support beams 111 and the two second support beams 112 are integrally formed by a die-casting process. In other embodiments, the battery frame 110 may be a split component, for example, the two first support beams 111 and the two second support beams 112 are separately formed and then connected to each other, and the connection between the first support beam 111 and the second support beam 112 may be, but is not limited to, welding, fastening, etc.

[0063] The sill beam 120 is the primary supporting component of the vehicle body 100, serving to support and reinforce the entire vehicle body 100. It is understood that the sill beam 120 is made of a rigid material, which may include, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, and the like. There may be two sill beams 120: one located on the left side of the vehicle body 100 and connected to the first support beam 111 located on the left side of the vehicle body 100; the other located on the right side of the vehicle body 100 and connected to the first support beam 111 located on the right side of the vehicle body 100. During normal use of the electric vehicle 1000, the sill beam 120 is located below the doors of the electric vehicle 1000 in the height direction of the vehicle body 100. It is understood that the dimension of the sill beam 120 along the width direction of the vehicle body 100 is smaller than its dimension along the length direction of the vehicle body 100. For example, the sill beam 120 may be linear and extend along the length of the vehicle body 100; or, for example, the sill beam 120 may be curved and extend in a zigzag manner along the length of the vehicle body 100. In some embodiments, to reduce the weight of the vehicle body 100, the sill beam 120 may have a hollow structure, i.e., a cavity is formed within the sill beam 120. In some embodiments, the sill beam 120 may be an integrally molded component, for example, formed integrally through a die-casting process. In other embodiments, the sill beam 120 may be a separate component, for example, comprising multiple sections that are individually molded and then interconnected to form a single unit.

[0064] The sill beam 120 is mounted on the first support beam 111. In other words, the sill beam 120 is directly connected to the first support beam 111. The connection between the sill beam 120 and the first support beam 111 may be, but is not limited to, welding, fastening, etc. In some embodiments, the vehicle body 100 may further include side panels (not shown). The side panels are connected to the sill beam 120. The surface of the side panels facing away from the sill beam 120 constitutes part of the outer wall of the vehicle body 100. The connection between the side panels and the sill beam 120 may be, but is not limited to, welding, fastening, etc.

[0065] The vehicle body 100 provided in the embodiment of the present application installs the sill beam 120 on the first support beam 111 of the battery frame 110, so that the sill beam 120 and the first support beam 111 are connected into a whole, thereby effectively improving the bending and torsional rigidity of the vehicle body 100. In this way, not only can the thickness of the sill beam 120 be reduced to a certain extent to reduce the weight of the sill beam 120, but there is no need to configure additional connecting components for connecting the battery frame 110 and the sill beam 120, thereby effectively reducing the weight of the vehicle body 100. At the same time, the battery frame 110 can fully utilize the width space of the vehicle body 100, thereby effectively increasing the space of the cavity 113, so that the cavity 113 can accommodate more battery cells, thereby effectively improving the endurance performance of the electric vehicle 1000.

[0066] In some embodiments of the present application, please refer to Figures 3 to 6. The first support beam 111 includes a first beam body 1111 and a first support seat 1112. The first support seat 1112 is connected to the side of the first beam body 1111 facing away from the cavity 113 or the side facing the cavity 113. The threshold beam 120 includes a second beam body 121, and the second beam body 121 is installed on the first support seat 1112.

[0067] The first beam 1111 is the primary support component of the first support beam 111, and the first support base 1112 provides a mounting environment for the sill beam 120. In some embodiments, the first support base 1112 is connected to the side of the first beam 1111 facing away from the cavity 113. This allows the second beam 121 to free up space in the cavity 113, effectively improving the space utilization of the cavity 113 and accommodating more battery cells, thereby further enhancing the range of the electric vehicle 1000. In other embodiments, the first support base 1112 is connected to the side of the first beam 1111 facing the cavity 113. In some embodiments, the first support base 1112 can be strip-shaped and extend along the length of the first beam 1111. In other embodiments, the first support base 1112 can include multiple first bases (not shown), spaced apart along the length of the first beam 1111 and connected to the sill beam 120. In some embodiments, the first beam body 1111 and the first support seat 1112 can be integrally formed components, for example, the first beam body 1111 and the first support seat 1112 can be integrally formed using a die-casting process. In other embodiments, the first beam body 1111 and the first support seat 1112 can be separate components, for example, the first beam body 1111 and the first support seat 1112 can be separately formed and then connected to each other. The connection between the first beam body 1111 and the first support seat 1112 can be, but is not limited to, welding, fastening, etc. In the case where the first beam body 1111 and the first support seat 1112 are separate components, the material of the first beam body 1111 and the first support seat 1112 can be the same, for example, the material of the first beam body 1111 and the first support seat 1112 can be an aluminum alloy. The material of the first beam body 1111 and the first support seat 1112 can also be different, for example, the material of the first beam body 1111 is an aluminum alloy and the material of the first support seat 1112 is stainless steel.

[0068] The second beam body 121 is the main supporting component of the sill beam 120. The second beam body 121 can be installed on other parts of the first support seat 1112 except the part used to connect with the first beam body 1111. For example, the sill beam 120 is installed on the side of the first support seat 1112 facing away from the bottom of the vehicle body 100; for another example, the sill beam 120 is installed on the side of the first support seat 1112 facing away from the first beam body 1111.

[0069] By adopting the above technical solution, it is convenient to install the door sill beam 120 on the first support beam 111.

[0070] In some embodiments of the present application, referring to Figures 5 and 6 , the second beam 121 is mounted on a side of the first support base 1112 facing away from the bottom of the vehicle body 100. The second beam 121 is fixed to the first support base 1112 by welding, bonding, and / or via fasteners. The fasteners may be, but are not limited to, bolts, screws, rivets, and the like.

[0071] By adopting the above technical solution, the overall width formed by the connection between the sill beam 120 and the first support beam 111 can be reduced, so that the battery frame 110 can more fully utilize the width space of the vehicle body 100, further increasing the space of the cavity 113, so that the cavity 113 can accommodate more battery cells, thereby further improving the endurance performance of the electric vehicle 1000.

[0072] In some embodiments of the present application, please refer to Figures 3 to 6 , the threshold beam 120 further includes a connecting member 122 protruding from a side of the second beam body 121 facing the first beam body 1111 , and the connecting member 122 is connected to the first beam body 1111 .

[0073] The connector 122 is a component used to connect the first beam 1111. A portion of the connector 122 is connected to the second beam 121. The connector 122 can be connected to other portions of the second beam 121 besides the portion connected to the first support base 1112. For example, the connector 122 can be connected to the side of the second beam 121 facing away from the bottom of the vehicle body 100. In another example, the connector 122 can be connected to the side of the second beam 121 facing the first beam 1111. It is understood that the connector 122 can be directly connected to the second beam 121, or indirectly connected to the second beam 121 through other portions of the rocker beam 120. Another portion of the connector 122 protrudes toward the first beam 1111 from the side of the second beam 121 facing the first beam 1111. This portion is used to connect to the first beam 1111. The connection between this portion and the first beam 1111 can be, but is not limited to, welding, fastening, etc. In some embodiments, the connecting member 122 may be in a strip-shaped structure and extend along the length direction of the second beam body 121. In other embodiments, the connecting member 122 may include a plurality of connecting portions (not shown), which are arranged at intervals along the length direction of the second beam body 121 and connected to the first beam body 1111. In some embodiments, the second beam body 121 and the connecting member 122 may be integrally formed components, for example, the second beam body 121 and the connecting member 122 are integrally formed through a die-casting process. In other embodiments, the second beam body 121 and the connecting member 122 may be separate components, for example, the second beam body 121 and the connecting member 122 are separately formed and then connected to each other, and the connection method between the second beam body 121 and the connecting member 122 may be, but is not limited to, welding, fastening connection, etc. In the case where the second beam body 121 and the connecting member 122 are separate components, the material of the second beam body 121 and the material of the connecting member 122 can be the same, for example, the material of the second beam body 121 and the material of the connecting member 122 are aluminum alloy. The material of the second beam body 121 and the material of the connecting member 122 can also be different, for example, the material of the second beam body 121 is aluminum alloy, and the material of the connecting member 122 is stainless steel.

[0074] By adopting the above technical solution, the second beam body 121 of the sill beam 120 is installed on the first support seat 1112, and the connecting member 122 of the sill beam 120 is connected to the first beam body 1111, which effectively improves the connection strength between the sill beam 120 and the first support beam 111, thereby further improving the bending and torsional stiffness of the vehicle body 100.

[0075] In some embodiments of the present application, referring to Figures 5 and 6 , the connector 122 is a plate, which is connected to the first beam 1111 by welding, bonding, and / or via a fixing member. The fixing member may be, but is not limited to, bolts, screws, rivets, and the like.

[0076] In other words, the connector 122 has a plate-like structure. The connector 122 can be a flat plate or a plate with a regular or irregular concave-convex structure, depending on the actual application requirements. It can be understood that when the connector 122 is connected to the side of the first beam 1111 facing away from the bottom of the vehicle body 100, the plate surface of the connector 122 is in contact with the side of the first beam 1111 facing away from the bottom of the vehicle body 100.

[0077] By adopting the above technical solution, the weight of the door sill beam 120 is effectively reduced, and the weight of the vehicle body 100 is further reduced, thereby further improving the endurance performance of the electric vehicle 1000. At the same time, the height space of the vehicle body 100 occupied by the connecting member 122 can be reduced, making the structure of the vehicle body 100 more compact.

[0078] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 , the connecting member 122 is connected to a side of the first beam 1111 facing away from the bottom of the vehicle body 100 .

[0079] By adopting the above technical solution, the overall width formed by the connection between the sill beam 120 and the first support beam 111 can be reduced, so that the battery frame 110 can more fully utilize the width space of the vehicle body 100, further increasing the space of the cavity 113, so that the cavity 113 can accommodate more battery cells, thereby further improving the endurance performance of the electric vehicle 1000.

[0080] In some embodiments of the present application, referring to FIG. 5 and FIG. 6 , the height of the first beam 1111 facing away from the bottom of the vehicle body 100 is greater than the height of the first support base 1112 facing away from the bottom of the vehicle body 100 .

[0081] In other words, with the support plane as a reference plane, in the height direction of the vehicle body 100, the distance between the side of the first beam 1111 facing away from the bottom of the vehicle body 100 and the reference plane is greater than the distance between the side of the first support base 1112 facing away from the bottom of the vehicle body 100 and the reference plane. Thus, the first beam 1111 and the first support base 1112 are connected to form a stepped structure. When the second beam 121 is attached to the side of the first support base 1112 facing away from the bottom of the vehicle body 100, at least a portion of the second beam 121 overlaps with the first beam 1111 in the width direction of the vehicle body 100.

[0082] By adopting the above technical solution, the height of the entire structure formed by connecting the sill beam 120 and the first support beam 111 can be reduced, making the structure of the vehicle body 100 more compact.

[0083] In some embodiments of the present application, please refer to FIG. 2 to FIG. 6 , the vehicle body 100 further includes a floor 130 , which is installed on the first support beam 111 and is used to seal the cavity 113 .

[0084] The floor panel 130 is a component used to provide mounting space for components located within the cockpit. For example, the seats of the electric vehicle 1000 are mounted on the floor panel 130. The floor panel 130 supports the aforementioned components and passengers. In this embodiment, the floor panel 130 also serves as a battery cover to seal the cavity 113 of the battery frame 110. The floor panel 130 is made of a rigid material, which may include, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, etc. The floor panel 130 is mounted on the first support beams 111. It is understood that if there are two first support beams 111, the floor panel 130 is mounted on one first support beam 111 on one side of the vehicle body 100 in the width direction, and the floor panel 130 is mounted on the other first support beam 111 on the other side of the vehicle body 100 in the width direction. The connection between the floor panel 130 and the first support beams 111 may include, but is not limited to, welding, fastening, etc. In some embodiments, when the battery frame 110 includes two second support beams 112, the floor 130 is mounted on one second support beam 112 along one side of the length of the vehicle body 100, and the floor 130 is mounted on the other second support beam 112 along the other side of the length of the vehicle body 100. The connection between the floor 130 and the second support beam 112 may be, but is not limited to, welding, fastening, etc. In some embodiments, the floor 130 may be an integrally molded component, for example, the floor 130 is integrally molded through a die-casting process. In other embodiments, the floor 130 may be a split component, for example, the floor 130 includes multiple parts, each of which is separately molded and then connected to form a whole.

[0085] By adopting the above technical solution, the floor 130 of the vehicle body 100 is used as a battery cover to seal the cavity 113. This eliminates the need for an additional battery cover, further reducing the weight of the vehicle body 100 and further improving the endurance performance of the electric vehicle 1000.

[0086] In some embodiments of the present application, please refer to Figures 5 and 6 together. The first support beam 111 includes a first beam body 1111, a first support seat 1112 connected to the side of the first beam body 1111 facing away from the cavity 113, and a second support seat 1113 connected to the side of the first beam body 1111 facing the cavity 113. The threshold beam 120 includes a second beam body 121, the second beam body 121 is installed on the first support seat 1112, and the floor 130 is installed on the second support seat 1113.

[0087] The second support base 1113 is used to provide an installation environment for the floor 130. In some embodiments, the second support base 1113 can be a strip-shaped structure and extend along the length of the first beam 1111. In other embodiments, the second support base 1113 can include a plurality of second bases (not shown), which are arranged at intervals along the length of the first beam 1111 and connected to the floor 130. In some embodiments, the first beam 1111, the first support base 1112, and the second support base 1113 can be integrally formed components. For example, the first beam 1111, the first support base 1112, and the second support base 1113 are integrally formed using a die-casting process. In other embodiments, the first beam body 1111, the first support seat 1112 and the second support seat 1113 can be separate components. For example, the first beam body 1111, the first support seat 1112 and the second support seat 1113 are connected to each other after being formed separately. The connection method between the first beam body 1111, the first support seat 1112 and the second support seat 1113 can be but is not limited to welding, fastening connection, etc. When the first beam body 1111, the first support seat 1112 and the second support seat 1113 are separate components, the material of the first beam body 1111, the material of the first support seat 1112 and the material of the second support seat 1113 can be the same, for example, the material of the first beam body 1111, the material of the first support seat 1112 and the material of the second support seat 1113 are aluminum alloy, and the material of the first beam body 1111, the material of the first support seat 1112 and the material of the second support seat 1113 can also be different, for example, the material of the first beam body 1111 is aluminum alloy, and the material of the first support seat 1112 and the second support seat 1113 are stainless steel.

[0088] When the battery frame 110 includes second support beams 112 and there are two first support beams 111 and two second support beams 112, the second support beam 112 includes a third beam body 1121 and a third support base 1122. The third beam body 1121 is connected between the two first support beams 111, and the third support base 1122 is connected to the side of the third beam body 1121 facing the cavity 113. The floor panel 130 is mounted on one side of the length of the vehicle body 100 to the third support base 1122 of one second support beam 112, and on the other side of the length of the vehicle body 100 to the third support base 1122 of the other second support beam 112. The third beam body 1121 is the primary supporting component of the second support beam 112, and the third support base 1122 is used to provide a mounting environment for the floor panel 130. In some embodiments, the third support base 1122 can be a strip-shaped structure extending along the length of the third beam body 1121. In other embodiments, the third support base 1122 may include multiple third base bodies (not shown), which are spaced apart along the length of the third beam 1121 and connected to the floor 130. In some embodiments, the third beam 1121 and the third support base 1122 may be integrally formed components, for example, the third beam 1121 and the third support base 1122 may be integrally formed using a die-casting process. In other embodiments, the third beam 1121 and the third support base 1122 may be separate components, for example, the third beam 1121 and the third support base 1122 may be separately formed and then connected to each other. The connection between the third beam 1121 and the third support base 1122 may be, but is not limited to, welding, fastening, etc. When the third beam body 1121 and the third support seat 1122 are separate components, the material of the third beam body 1121 and the material of the third support seat 1122 can be the same, for example, the material of the third beam body 1121 and the material of the third support seat 1122 are aluminum alloy. The material of the third beam body 1121 and the material of the third support seat 1122 can also be different, for example, the material of the third beam body 1121 is aluminum alloy, and the material of the third support seat 1122 is stainless steel.

[0089] By adopting the above technical solution, it is convenient to install the door sill beam 120 and the floor 130 on the first support beam 111 , and effectively achieve the sealing of the cavity 113 of the battery frame 110 by the floor 130 .

[0090] In some embodiments of the present application, referring to FIG. 6 , a pre-positioning structure 150 is provided between the second support base 1113 and the floor 130 .

[0091] The pre-positioning structure 150 is a structure for limiting the position of the floor 130 when the floor 130 is placed on the second support 1113. The pre-positioning structure 150 can be, but is not limited to, a concave-convex structure, a magnetic structure, a positioning pin structure, and the like.

[0092] By adopting the above technical solution, before the connection operation between the floor 130 and the second support seat 1113 is performed, the floor 130 can be pre-fixed on the second support seat 1113 through the pre-positioning structure 150, which facilitates the connection operation between the second support seat 1113 and the floor 130, thereby effectively improving the assembly efficiency of the vehicle body 100.

[0093] In some embodiments of the present application, referring to FIG. 6 , the pre-positioning structure 150 includes a convex portion 151 and a concave portion 152 . The convex portion 151 is disposed on the floor 130 , and the concave portion 152 is disposed on the second support seat 1113 . The convex portion 151 and the concave portion 152 are plugged into each other.

[0094] In other words, in this embodiment, the pre-positioning structure 150 is a concave-convex structure. The convex portion 151 is a portion protruding from the surface of the floor 130, and the concave portion 152 is a portion recessed in the surface of the second support portion. The convex portion 151 can be, but is not limited to, a convex strip, a bump, etc., and the shape of the concave portion 152 is adapted to the shape of the convex portion 151. For example, the convex portion 151 is a convex strip, and the concave portion 152 is a strip-shaped groove.

[0095] When the floor 130 is placed on the second support seat 1113, the protrusion 151 is inserted into the recess 152. It can be understood that when the protrusion 151 is inserted into the recess 152, the outer wall of the protrusion 151 fits with the inner wall of the recess 152. Of course, considering the assembly error, there may be a small gap between the outer wall of the protrusion 151 and the inner wall of the recess 152.

[0096] In other embodiments of the present application, the pre-positioning structure 150 includes a convex portion 151 and a concave portion 152. The convex portion 151 is disposed on the second support base 1113, and the concave portion 152 is disposed on the floor 130. The convex portion 151 and the concave portion 152 are plugged into each other. The convex portion 151 is a portion protruding from the surface of the second support portion, and the concave portion 152 is a portion recessed into the surface of the floor 130.

[0097] By adopting the above technical solution, the floor 130 is effectively pre-fixed on the second support base 1113 before the connection operation between the floor 130 and the second support base 1113 is performed. In addition, the structure is simple, and the manufacturing cost of the vehicle body 100 is effectively reduced.

[0098] In some embodiments of the present application, referring to FIG. 6 , the vehicle body 100 further includes a first isolation layer 160 , which is disposed between the first support beam 111 and the floor 130 .

[0099] The first isolation layer 160 is a component used to separate the first support beam 111 from the floor 130. The first isolation layer 160 can be made of a flexible material, which can be, but is not limited to, glue, rubber, silicone, sponge, foam, etc. In some embodiments, glue can be applied to the portion of the first support beam 111 facing the floor 130 and / or to the portion of the floor 130 facing the first support beam 111, and the first isolation layer 160 is formed after the glue solidifies. In other embodiments, the first isolation layer 160 is a prefabricated part. The first isolation layer 160 is placed on the first support beam 111, and then the floor 130 is placed on the first isolation layer 160 and connected to the first support beam 111, so that the floor 130 and the first support beam 111 cooperate to clamp the first isolation layer 160, thereby separating the first support beam 111 from the floor 130.

[0100] When the battery frame 110 includes the second support beam 112 and the floor 130 is connected to the second support beam 112, the vehicle body 100 may further include a third isolation layer (not shown) disposed between the second support beam 112 and the floor 130 to separate the second support beam 112 from the floor 130. The third isolation layer and the first isolation layer 160 may be integrally formed components, for example, integrally formed with the first isolation layer 160 by an injection molding process.

[0101] By adopting the above technical solution, the first support beam 111 can be separated from the floor 130, which effectively improves the modal performance of the vehicle body 100, thereby effectively improving the situation where abnormal noise is generated due to contact and friction between the first support beam 111 and the floor 130.

[0102] In some embodiments of the present application, referring to FIG. 6 , the vehicle body 100 further includes a first sealing member 170 , which is disposed between the first support beam 111 and the floor 130 .

[0103] The first sealing member 170 is a component for sealing the gap between the first support beam 111 and the floor 130. The first sealing member 170 is made of a sealing material, which may be, but is not limited to, rubber, silicone, adhesive, etc.

[0104] When the battery frame 110 includes the second support beam 112 and the floor panel 130 is connected to the second support beam 112, the vehicle body 100 may further include a third seal (not shown) disposed between the second support beam 112 and the floor panel 130 to seal the gap between the second support beam 112 and the floor panel 130. The third seal and the first seal 170 may be integrally formed components. For example, the third seal and the first seal 170 may be integrally formed into a sealing ring through an injection molding process.

[0105] By adopting the above technical solution, the situation where foreign objects such as dust and water vapor enter the cavity 113 is effectively improved, the sealing performance of the vehicle body 100 is effectively improved, and the safety performance of the electric vehicle 1000 is effectively improved.

[0106] In some embodiments of the present application, please refer to FIG. 3 to FIG. 6 , the vehicle body 100 further includes a supporting plate 140 , and the supporting plate 140 is covered on a side of the frame facing away from the floor 130 .

[0107] The support plate 140 is used to support the battery cells and other components disposed in the cavity 113. The support plate 140 is also used to seal the cavity 113. It is understood that the floor 130 seals one opening of the cavity 113, and the support plate 140 seals the other opening of the cavity 113. The support plate 140 is made of a rigid material, which may be, but is not limited to, aluminum, aluminum alloy, iron, stainless steel, etc. The support plate 140 is mounted on the first support beam 111. It is understood that when there are two first support beams 111, the support plate 140 is mounted on one first support beam 111 on one side along the width direction of the vehicle body 100, and the support plate 140 is mounted on the other first support beam 111 on the other side along the width direction of the vehicle body 100. The connection between the support plate 140 and the first support beam 111 may be, but is not limited to, welding, fastening, etc. In some embodiments, when the battery frame 110 includes two second support beams 112, the support plate 140 is mounted on one second support beam 112 along one side of the length direction of the vehicle body 100, and the support plate 140 is mounted on the other second support beam 112 along the other side of the length direction of the vehicle body 100. The connection between the support plate 140 and the second support beam 112 can be, but is not limited to, welding, fastening, etc. In some embodiments, the support plate 140 can be an integrally molded component, for example, the support plate 140 is integrally molded by a die-casting process. In other embodiments, the support plate 140 can be a split component, for example, the support plate 140 includes multiple parts, each of which is separately molded and then connected to each other to form a whole.

[0108] By adopting the above technical solution, the battery frame 110, the floor 130 and the supporting plate 140 are enclosed together to form the cavity 113, which effectively protects the battery cells.

[0109] In some embodiments of the present application, referring to FIG. 6 , the vehicle body 100 further includes a second isolation layer 180 . The second isolation layer 180 is disposed between the first support beam 111 and the sill beam 120 .

[0110] The second insulating layer 180 is a component used to separate the first support beam 111 from the sill beam 120. It is understood that if the sill beam 120 includes a second beam body 121 and a connector 122, the second insulating layer 180 may cover only the interface between the second beam body 121 and the first support beam 111, or only the interface between the connector 122 and the first support beam 111, or both. The second insulating layer 180 may be made of a flexible material, such as, but not limited to, glue, rubber, silicone, sponge, foam, etc. In some embodiments, glue may be applied to the portion of the first support beam 111 facing the sill beam 120 and / or to the portion of the sill beam 120 facing the first support beam 111. The glue solidifies to form the second insulating layer 180. In other embodiments, the second isolation layer body 180 is a prefabricated part, the second isolation layer body 180 is placed on the first support beam 111, and then the threshold beam 120 is placed on the second isolation layer body 180 and the threshold beam 120 and the first support beam 111 are connected so that the threshold beam 120 and the first support beam 111 cooperate to clamp the second isolation layer body 180, thereby separating the first support beam 111 from the threshold beam 120.

[0111] By adopting the above technical solution, the first support beam 111 can be separated from the rocker beam 120, which effectively improves the modal performance of the vehicle body 100, thereby effectively improving the situation where abnormal noise is generated due to contact and friction between the first support beam 111 and the rocker beam 120.

[0112] In some embodiments of the present application, referring to FIG. 6 , the vehicle body 100 further includes a second sealing member 190 . The second sealing member 190 is disposed between the first support beam 111 and the rocker beam 120 .

[0113] The second seal 190 is a component used to seal the gap between the first support beam 111 and the threshold beam 120. The first seal 170 is made of a sealing material, which may be, but is not limited to, rubber, silicone, adhesive, or the like. In some embodiments, the second seal 190 is annular, with the edge of the second seal 190 extending along the edge of the battery frame 110. When the threshold beam 120 includes a second beam body 121 and a connector 122, the second seal 190 can be positioned between the second beam body 121 and the first support beam 111, or between the connector 122 and the first support beam 111.

[0114] By adopting the above technical solution, the situation where foreign objects such as dust and water vapor enter the cavity 113 is effectively improved, the sealing performance of the vehicle body 100 is effectively improved, and the safety performance of the electric vehicle 1000 is effectively improved.

[0115] In some embodiments of the present application, referring to Figures 2 to 6 , a vehicle body 100 includes a battery frame 110, a sill beam 120, a floor panel 130, a first isolation layer 160, a second isolation layer 180, and a second sealing member 190. The battery frame 110 has a cavity 113 for accommodating battery cells. The battery frame 110 includes a first support beam 111 disposed on one side of the vehicle body 100 along the width direction. The first support beam 111 includes a first beam body 1111, a first support seat 1112, and a second support seat 1113. The first support seat 1112 is connected to the side of the first beam body 1111 facing away from the cavity 113, and the second support seat 1113 is connected to the side of the first beam body 1111 facing the cavity 113. The sill beam 120 includes a second beam body 121 and a connector 122. The second beam body 121 is mounted on the side of the first support base 1112 facing away from the bottom of the vehicle body 100. The connector 122 is a plate member and protrudes from the side of the second beam body 121 facing the first beam body 1111. The connector 122 is connected to the side of the first beam body 1111 facing away from the bottom of the vehicle body 100. A second insulating layer 180 and a second sealing member 190 are disposed between the sill beam 120 and the first support beam 111. The floor panel 130 is mounted on the side of the second support base 1113 facing away from the bottom of the vehicle body 100 and seals the aforementioned cavity 113.

[0116] In the second aspect, referring to FIG. 1 , an embodiment of the present application provides an electric vehicle 1000 , comprising the vehicle body 100 described in any one of the above embodiments.

[0117] The electric vehicle 1000 provided in the embodiment of the present application effectively improves the endurance performance of the electric vehicle 1000 by adopting the vehicle body 100 described in any of the above embodiments.

[0118] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle body, characterized in that: The vehicle body comprises: A battery frame having a cavity for accommodating a battery cell, the battery frame comprising a first support beam disposed on one side of the vehicle body along the width direction; The threshold beam is installed on the first supporting beam.

2. The vehicle body according to claim 1, characterized in that: The first support beam includes a first beam body and a first support seat, the first support seat is connected to the side of the first beam body facing away from the cavity or the side facing the cavity, and the threshold beam includes a second beam body, and the second beam body is installed on the first support seat.

3. The vehicle body according to claim 2, characterized in that: The second beam body is installed on a side of the first support seat facing away from the bottom of the vehicle body, and the second beam body is fixedly installed on the first support seat by welding, bonding and / or via a fixing member.

4. The vehicle body according to claim 2 or 3, characterized in that: The threshold beam further includes a connecting member protruding from a side of the second beam body facing the first beam body, and the connecting member is connected to the first beam body.

5. The vehicle body according to claim 4, characterized in that: The connecting member is a plate member, and the connecting member is connected to the first beam body by welding, bonding and / or via a fixing member.

6. The vehicle body according to claim 4 or 5, characterized in that: The connecting member is connected to a side of the first beam body facing away from the bottom of the vehicle body.

7. The vehicle body according to any one of claims 2 to 6, characterized in that: The height of the first beam body at a side facing away from the bottom of the vehicle body is greater than the height of the first support seat at a side facing away from the bottom of the vehicle body.

8. The vehicle body according to claim 1, characterized in that: The vehicle body further comprises a floor, which is mounted on the first support beam and is used to seal the cavity.

9. The vehicle body according to claim 8, characterized in that: The first support beam includes a first beam body, a first support seat connected to the side of the first beam body facing away from the cavity, and a second support seat connected to the side of the first beam body facing the cavity. The threshold beam includes a second beam body, the second beam body is installed on the first support seat, and the floor is installed on the second support seat.

10. The vehicle body according to claim 9, characterized in that: A pre-positioning structure is provided between the second supporting seat and the floor.

11. The vehicle body according to claim 10, characterized in that: The pre-positioning structure includes a convex portion and a concave portion; The convex part is arranged on the floor, and the concave part is arranged on the second supporting seat; or, The convex part is arranged on the second supporting seat, and the concave part is arranged on the floor; The convex part is plugged into the concave part.

12. The vehicle body according to any one of claims 8 to 11, characterized in that: The vehicle body further includes a first isolation layer body, which is disposed between the first support beam and the floor, and / or the vehicle body includes a first sealing member, which is disposed between the first support beam and the floor.

13. The vehicle body according to any one of claims 9 to 12, characterized in that: The number of the first support beams is two, and the battery frame also includes a second support beam, the second support beam includes a third beam body and a third support seat, the third beam body is connected between the two first support beams, the third support seat is connected to the side of the third beam body facing the cavity, and the floor is installed on the second support seat and the third support seat.

14. The vehicle body according to claim 13, characterized in that: The vehicle body further includes a third insulating layer body, which is disposed between the second supporting beam and the floor, and / or the vehicle body includes a third sealing member, which is disposed between the second supporting beam and the floor.

15. The vehicle body according to any one of claims 8 to 14, characterized in that: The vehicle body further comprises a supporting plate, and the supporting plate is covered on a side of the frame body facing away from the floor.

16. The vehicle body according to any one of claims 1 to 15, characterized in that: The vehicle body includes a second insulating layer body, which is arranged between the first support beam and the sill beam, and / or the vehicle body includes a second sealing member, which is arranged between the first support beam and the sill beam.

17. An electric vehicle, characterized in that: The electric vehicle comprises a vehicle body as claimed in any one of claims 1 to 16.

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