Chassis, Body-in-White and Electric Vehicle

Abstract

The embodiments of the present application belong to the technical field of automobile manufacturing, and specifically relate to a chassis, a body in white, and an electric vehicle. The embodiments of the present application aim to solve the problem of relatively high maintenance difficulty of electric vehicles. The chassis, body in white, and electric vehicle provided in this embodiment are such that the front ends of the first sill beam and the second sill beam of the chassis are both connected to the front panel assembly. The second sill beam includes a first inner beam and a first outer beam. The front end of the first inner beam is connected to the front panel assembly, the front end of the first outer beam is detachably connected to the front panel assembly, and the first inner beam and the first outer beam are detachably connected to each other. In this way, when a side collision occurs to the electric vehicle, since the first outer beam is located outside the body in white, the first outer beam is deformed after being collided. After the first outer beam is deformed, the first outer beam can be detached from the front panel assembly, and then the first outer beam can be replaced without disassembling the entire second sill beam, thereby reducing the maintenance difficulty of the electric vehicle.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of automobile manufacturing, and particularly to a chassis, a body-in-white, and an electric vehicle. Background Art

[0002] An electric vehicle generally includes a body-in-white, as well as components such as wheels and electric motors provided on the body-in-white. The electric motor drives the wheels to rotate, thereby providing power for the electric vehicle to travel. Among them, the body-in-white includes a chassis and an upper body structure provided on the chassis. The chassis and the upper body structure enclose a cab. Among them, the chassis includes a first sill beam and a second sill beam. The first sill beam and the second sill beam are located in the same horizontal plane, and both the first sill beam and the second sill beam are parallel to the driving direction of the vehicle. The upper body structure is connected to the first sill beam and the second sill beam.

[0003] However, when the vehicle collides, the first sill beam and the second sill are prone to bending, and it is relatively difficult to disassemble the first sill beam and the second sill beam, resulting in a relatively high repair difficulty for the electric vehicle. Summary of the Invention

[0004] The embodiments of the present application provide a chassis, a body-in-white, and an electric vehicle, which are used to solve the problem of relatively high repair difficulty of electric vehicles.

[0005] To achieve the above object, the present application adopts the following technical solutions:

[0006] On the one hand, the embodiments of the present application provide a chassis, including a first sill beam and a second sill beam. Both the first sill beam and the second sill beam extend along the driving direction of the electric vehicle. The front ends of the first sill beam and the second sill beam are both connected to the front-end module assembly. The second sill beam includes a first inner beam and a first outer beam. The first inner beam is located on the side of the first outer beam close to the first sill beam. The first inner beam is connected to the front-end module assembly, and the first outer beam is detachably connected to the front-end module assembly. The first outer beam is detachably connected to the first inner beam.

[0007] Through the above settings, the front ends of the first sill beam and the second sill beam of the chassis are both connected to the front-end module assembly. The second sill beam includes a first inner beam and a first outer beam. The front end of the first inner beam is connected to the front-end module assembly, the front end of the first outer beam is detachably connected to the front-end module assembly, and the first outer beam is detachably connected to the first inner beam. In this way, when the electric vehicle has a side collision, since the first outer beam is located outside the body-in-white, the first outer beam is deformed after being collided; after the first outer beam is deformed, the first outer beam can be disassembled from the front-end module assembly, and then the first outer beam can be replaced without disassembling the entire second sill beam, thereby reducing the repair difficulty of the electric vehicle.

[0008] In some embodiments that may include the above embodiments, the chassis further includes a sill connection portion. The sill connection portion can be connected to the front bulkhead. The sill connection portion is detachably connected to both the first outer beam and the first inner beam through a first threaded connector. With such an arrangement, the first outer beam and the first inner beam are connected to the sill connection portion through the same fastener, simplifying the structure of the chassis. In addition, by installing the first threaded connector, the installation of the first outer beam and the first inner beam can be achieved, and the assembly complexity of the chassis is also reduced.

[0009] In some embodiments that may include the above embodiments, a first insertion channel and a second insertion channel are provided on the sill connection portion. The centerlines of the first insertion channel and the second insertion channel are in the same horizontal plane, and the centerlines of the first insertion channel and the second insertion channel are parallel and spaced apart. The front end of the first inner beam is inserted into the first insertion channel, and the front end of the first outer beam is inserted into the second insertion channel.

[0010] With such an arrangement, while the first inner beam and the second inner beam are connected to the sill connection portion through the first threaded connector, the first inner beam is inserted into the first insertion channel and the first outer beam is inserted into the second insertion channel, which can improve the connection force between the first inner beam and the first outer beam and the sill connection portion.

[0011] In some embodiments that may include the above embodiments, a first through hole penetrating the first insertion channel and the second insertion channel is provided on the sill connection portion. The first through hole can be perpendicular to the centerlines of the first insertion channel and the second insertion channel; a second through hole is provided at the front end of the first inner beam, and a third through hole is provided at the front end of the first outer beam. The centerlines of the first through hole, the second through hole, and the third through hole are collinear, and the first threaded connector is inserted through the first through hole, the second through hole, and the third through hole. With such an arrangement, the structure is simple and easy to manufacture.

[0012] In some embodiments that may include the above embodiments, an installation space for accommodating the battery cell is formed between the first inner beam and the first sill beam. With such an arrangement, the battery cell is installed between the first inner beam and the first sill beam, which can improve the space utilization rate of the chassis and further improve the structural compactness of the electric vehicle.

[0013] In some embodiments that may include the above embodiments, the chassis further includes an upper cover and a lower cover. The upper cover is connected to the first inner beam and the first sill beam, and the lower cover is connected to the first inner beam and the first sill beam. The lower cover is located below the upper cover. The upper cover and the lower cover can enclose the installation space, so that the upper cover, the lower cover, the first inner beam, and the first sill beam form a battery pack for accommodating the battery cells. With this arrangement, the battery pack for accommodating the battery cells is formed by the upper cover, the lower cover, the first inner beam, and the first sill beam of the chassis, without the need to additionally provide a battery pack for accommodating the battery cells, further improving the space utilization rate of the chassis and the structural compactness of the electric vehicle. In addition, without the need to additionally provide a battery pack for accommodating the battery cells, the self-weight of the electric vehicle can also be reduced, thereby improving the driving range of the electric vehicle.

[0014] In some embodiments that may include the above embodiments, sealant is filled between the first inner beam and the side wall of the first insertion channel, and sealant is also filled between the first outer beam and the side wall of the second insertion channel. With this arrangement, the sealing performance of the battery pack can be further improved, thereby avoiding the influence of the external environment on the operation of the battery cells.

[0015] In some embodiments that may include the above embodiments, a groove is provided on the surface of the sill connection portion facing away from the first sill beam, and the first hole penetrates through the bottom of the groove; the first threaded connection member includes a first fastening bolt, and the head of the first fastening bolt or the nut cooperating with the first fastening bolt is received in the groove. With this arrangement, the head of the first fastening bolt or the nut can be prevented from protruding from the surface of the sill connection portion facing away from the first sill beam, thereby avoiding the head of the first fastening bolt or the nut from affecting the installation of other parts.

[0016] In some embodiments that may include the above embodiments, the first outer beam and the first inner beam are detachably connected. With this arrangement, the overall stiffness of the chassis can be improved.

[0017] In some embodiments that may include the above embodiments, the first outer beam and the first inner beam are detachably connected by a second threaded connection member. With this arrangement, the structure is simple and the assembly is convenient.

[0018] In some embodiments that may include the above embodiments, connection glue is filled between the first outer beam and the first inner beam, and the connection glue is bonded to both the first outer beam and the first inner beam. With this arrangement, the connection force between the first outer beam and the first inner beam can be improved.

[0019] In some embodiments that may include the above embodiments, a fourth through hole is provided on the first outer beam, a threaded hole is provided on the first inner beam, and the second threaded connection member includes a second fastening bolt. The second fastening bolt passes through the fourth through hole and cooperates with the threaded hole. With this arrangement, there is no need to provide a nut cooperating with the second fastening bolt, simplifying the structure of the chassis and also reducing the mass of the chassis.

[0020] In some embodiments that may include the above embodiments, the first outer beam may include a first beam body and a second beam body. The first beam body and the second beam body may be arranged in sequence along the driving direction. The front end of the first beam body is detachably connected to the front enclosure assembly, and the rear end of the first beam body and the front end of the second beam body enclose a fourth through hole. Through the above arrangement, the first outer beam includes the first beam body and the second beam body, that is, the first outer beam is a split structure. In this way, the first beam body and the second beam body can be disassembled separately and installed separately, facilitating the disassembly and installation of the first outer beam.

[0021] In some embodiments that may include the above embodiments, the first outer beam further includes a connecting block. A fifth through hole is provided on the connecting block. A first recess is provided on the surface of the first beam body facing away from the first inner beam, and the first recess penetrates the rear end of the first beam body. A second recess is provided on the surface of the second beam body facing away from the first inner beam, and the second recess penetrates the front end of the second beam body. The first recess and the second recess enclose a receiving groove, and the connecting block is received in the receiving groove. The first fastening bolt sequentially passes through the fifth through hole and the fourth through hole and then cooperates with the threaded hole on the first inner beam to realize the connection between the first outer beam and the first inner beam.

[0022] Through the above arrangement, the connecting block can press the first beam body and the second beam body against the first inner beam, improving the connection force between the first inner beam and the first outer beam; in addition, the connecting block is received in the receiving groove, which can prevent the connecting block from protruding from the surface of the first outer beam facing away from the first inner beam, so as not to affect the installation of other parts.

[0023] In some embodiments that may include the above embodiments, a first insertion portion is provided at the rear end of the first beam body, and a second insertion portion is provided at the front end of the second beam body. The first insertion portion is inserted into the second insertion portion; the fourth through hole penetrates the first insertion portion and the second insertion portion. With this arrangement, while the first beam body and the second beam body are connected to the first inner beam by the second fastening bolt, the first insertion portion and the second insertion portion are inserted into each other, which can improve the connection force between the first beam body and the second beam body and the first inner beam, and also improve the connection force between the first beam body and the second beam body.

[0024] In some embodiments that may include the above embodiments, a plugging groove is provided on the surface of the first insertion portion facing away from the first inner beam. The plugging groove extends along the driving direction and penetrates the rear end of the first insertion portion; the second insertion portion includes a plugging body, and the plugging body is inserted into the plugging groove.

[0025] In some embodiments that may include the above embodiments, the first outer beam includes an energy absorption structure for absorbing the impact force perpendicular to the driving direction. The side collision force can be absorbed through the energy absorption structure, thereby preventing other parts from being damaged during the collision.

[0026] In some embodiments that may include the above embodiments, the first sill beam includes a second inner beam and a second outer beam. The second inner beam is located on the side of the second outer beam close to the second sill beam. The second inner beam is connected to the front enclosure assembly, and the second outer beam is detachably connected to the front enclosure assembly. With this arrangement, when a side collision occurs in an electric vehicle, the second outer beam deforms, and the second outer beam can be disassembled to facilitate the replacement of the second outer beam, further reducing the maintenance difficulty of the electric vehicle.

[0027] On the other hand, the present application also provides a body-in-white, including the chassis as described above and an upper body structure disposed on the upper part of the chassis. The upper body structure and the chassis enclose a cab.

[0028] On the other hand, the present application also provides an electric vehicle, including the body-in-white as described above, wheels, a power system, and a battery cell; the wheels are disposed on the body-in-white, the power system is in transmission connection with the wheels, and the battery cell is disposed between the first inner beam and the first sill beam and is electrically connected to the power system.

[0029] In the chassis, body-in-white, and electric vehicle provided by the embodiments of the present application, the front ends of the first sill beam and the second sill beam of the chassis are both connected to the front enclosure assembly. The second sill beam includes a first inner beam and a first outer beam. The front end of the first inner beam is connected to the front enclosure assembly, the front end of the first outer beam is detachably connected to the front enclosure assembly, and the first inner beam and the first outer beam are detachably connected to each other. Thus, when a side collision occurs in the electric vehicle, since the first outer beam is located on the outer side of the body-in-white, the first outer beam deforms after being collided; after the first outer beam deforms, the first outer beam can be disassembled from the front enclosure assembly, and then the first outer beam can be replaced without disassembling the entire second sill beam, thereby reducing the maintenance difficulty of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the electric vehicle provided by the embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of the body-in-white provided by the embodiment of the present application;

[0032] Figure 3 is a schematic connection diagram of the first sill beam and the second sill beam of the chassis and the front enclosure assembly provided by the embodiment of the present application;

[0033] Figure 4 is a schematic connection diagram of the second sill beam of the chassis and the front enclosure assembly provided by the embodiment of the present application;

[0034] Figure 5 is Figure 4 a schematic connection diagram of the first outer beam and the front enclosure assembly in

[0035] Figure 6Schematic diagram of the structure in the chassis provided by the embodiment of the present application, where the first outer beam is inserted into the first insertion channel and the first inner beam is inserted into the second insertion channel;

[0036] Figure 7 Schematic diagram of the chassis provided by this embodiment;

[0037] Figure 8 For Figure 7 Cross-sectional view taken along the A-A direction in;

[0038] Figure 9 Schematic diagram of the chassis in the related art;

[0039] Figure 10 Schematic diagram of the structure where the first outer beam in the chassis provided by the embodiment of the present application includes an energy absorption structure Figure 1 ;

[0040] Figure 11 Schematic diagram of the structure where the first outer beam in the chassis provided by the embodiment of the present application includes an energy absorption structure Figure 2 ;

[0041] Figure 12 Schematic diagram of the connection between the second sill beam and the second rear beam in the chassis provided by the embodiment of the present application;

[0042] Figure 13 Schematic diagram of the connection between the first outer beam and the first inner beam in the chassis provided by the embodiment of the present application Figure 1 ;

[0043] Figure 14 Schematic diagram of the connection between the first outer beam and the first inner beam in the chassis provided by the embodiment of the present application Figure 2 ;

[0044] Figure 15 Schematic diagram of the connection between the first outer beam and the first inner beam in the chassis provided by the embodiment of the present application through a plurality of second fastening bolts;

[0045] Figure 16 Schematic diagram of the connection between the first beam body and the second beam body in the chassis provided by the embodiment of the present application Figure 1 ;

[0046] Figure 17 Schematic diagram of the connection between the first beam body and the second beam body in the chassis provided by the embodiment of the present application Figure 2 ;

[0047] Figure 18 Schematic diagram of the connection between the first beam body and the second beam body in the chassis provided by the embodiment of the present application Figure 3 .

[0048] Explanation of reference numerals:

[0049] 1: Electric vehicle;

[0050] 10: Body-in-white;

[0051] 20: Wheel;

[0052] 30: Battery cell;

[0053] 40: Upper cover;

[0054] 50: Lower cover;

[0055] 60: Installation space;

[0056] 70: Energy absorption structure;

[0057] 100: Chassis;

[0058] 101: Front panel assembly;

[0059] 102: Instrument panel bracket;

[0060] 103: Front panel;

[0061] 104: First sill beam;

[0062] 105: Second sill beam;

[0063] 106: Sill connection part;

[0064] 107: Cross beam;

[0065] 108: First rear beam;

[0066] 109: Second rear beam;

[0067] 1041: Second outer beam;

[0068] 1042: Second inner beam;

[0069] 1051: First outer beam;

[0070] 1052: First inner beam;

[0071] 1053: Second fastening bolt;

[0072] 1054: First beam body;

[0073] 1055: Second beam body;

[0074] 1056: First recessed part;

[0075] 1057: Second recessed part;

[0076] 1058: Connection block;

[0077] 1059: Connection glue;

[0078] 10511: First plug-in part;

[0079] 10512: Plug-in groove;

[0080] 10513: Second plug-in part;

[0081] 10514: Plug-in body;

[0082] 10515: Fourth through-hole;

[0083] 1061: First fastening bolt;

[0084] 1062: Groove;

[0085] 1063: First plug-in channel;

[0086] 1064: Second plug-in channel;

[0087] 1065: Sealant;

[0088] 1081: Threshold fixing part;

[0089] 1082: Third plug-in channel;

[0090] 1083: Fourth plug-in channel;

[0091] 1084: Fixing bolt;

[0092] 200: Upper body structure;

[0093] 201: Second side wall assembly;

[0094] 202: Roof;

[0095] 203: First support column;

[0096] 204: Second support column;

[0097] 205: Third support column;

[0098] 206: First connecting beam;

[0099] 207: Second connecting beam;

[0100] 208: First door frame;

[0101] 209: Second door frame;

[0102] 701: Energy absorption plate;

[0103] 702: Energy absorption housing;

[0104] 703: Main body. Detailed implementation mode

[0105] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0106] Hereinafter, terms such as "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0107] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", "right", "horizontal", and "vertical" are defined relative to the orientation in which the components in the accompanying drawings are schematically placed. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and they may change correspondingly according to the change of the orientation in which the components in the accompanying drawings are placed.

[0108] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium.

[0109] Figure 1 For the structural schematic diagram of the electric vehicle provided in the embodiments of the present application, please refer to Figure 1 , the embodiments of the present application provide an electric vehicle 1, and the electric vehicle 1 includes: a body-in-white 10, the body-in-white 10 encloses a cab and a passenger compartment, the driver is located in the cab, and the remaining members are located in the passenger compartment. The body-in-white 10 is used as a structural member of the electric vehicle 1, and the body-in-white 10 is used to bear the self-weight of the electric vehicle 1 and the mass of the vehicle occupants.

[0110] The body-in-white 10 includes a chassis 100 and an upper body structure 200 disposed above the chassis 100. The chassis 100 and the upper body structure 200 enclose a cab and a passenger compartment. Among them, a suspension system (not shown) is further provided on the chassis 100, and wheels 20 are mounted on the suspension system. The suspension system may include shock absorbers (not shown) with the tops connected to the chassis 100, and the wheels 20 are mounted at the bottoms of the shock absorbers. It can be understood that the number of wheels 20 of the electric vehicle 1 may be 4. Correspondingly, the suspension system includes four shock absorbers, and a wheel 20 is provided at the bottom of each shock absorber. When the electric vehicle 1 is running, the wheels 20 roll on the road surface. At the same time, the shock absorbers can absorb the jolts caused by the uneven road surface of the wheels 20, thereby improving the driving stability and comfort. Of course, in other implementation manners, the number of wheels 20 of the electric vehicle 1 may also be 6, 8, etc. Correspondingly, a shock absorber may be provided corresponding to each wheel 20, and the number of wheels 20 of the electric vehicle 1 is not limited in this embodiment.

[0111] The electric vehicle 1 further includes a power system (not shown). The power system is in transmission connection with the wheels 20 to drive the wheels 20 to rotate, thereby providing power for the running of the electric vehicle 1. Exemplarily, the power system may include an electric motor. The electric motor may be disposed on the body-in-white 10. Correspondingly, the main shaft of the electric motor may be in transmission connection with the wheels 20 through a half shaft, so that when the main shaft of the electric motor rotates, the wheels 20 are driven to rotate through the half shaft. Of course, in other implementation manners, the electric motor and the wheels 20 may be integrated. Exemplarily, a stator coil may be mounted on the shock absorber. Correspondingly, a plurality of rotor magnets are disposed on the wheels 20 surrounding the stator coil. When the vehicle is running, by controlling the stator coil to be charged, the rotor magnets can be driven to rotate around the stator coil, thereby driving the wheels 20 to rotate to provide power for the electric vehicle 1.

[0112] Continue to refer to Figure 1 , in the implementation manner where the number of wheels 20 of the electric vehicle 1 is 4, the 4 wheels 20 may be respectively located at the four vertices of a rectangle, and the rectangle is parallel to the horizontal plane. That is to say, a wheel 20 is provided corresponding to each vertex of the rectangle. Among them, the two wheels 20 at the front end along the running direction can be used to control the running direction of the electric vehicle 1. Correspondingly, the two wheels 20 at the rear end along the running direction are used to provide power for the running of the electric vehicle 1. Of course, in other implementation manners, the two wheels 20 at the front end along the running direction can provide power for the electric vehicle 1 while controlling the running direction of the electric vehicle 1. At the same time, the two wheels 20 at the rear end along the running direction can provide power for the electric vehicle 1; or the two wheels 20 at the rear end along the running direction do not provide power for the electric vehicle 1 and are only used to carry the body-in-white 10.

[0113] Figure 2 The structural schematic diagram of the body-in-white provided by the embodiment of the present application is shown for reference. Figure 2 In this embodiment, the body-in-white 10 includes a chassis 100 and an upper body structure 200 installed on the upper part of the chassis 100. The upper body structure 200 and the chassis 100 enclose a cab and a passenger compartment. Among them, the chassis 100 may include a first sill beam 104 and a second sill beam 105. The first sill beam 104 and the second sill beam 105 may be in the same horizontal plane, and both the first sill beam 104 and the second sill beam 105 extend along the driving direction of the electric vehicle 1; that is to say, the first sill beam 104 and the second sill beam 105 are substantially parallel to the driving direction of the electric vehicle 1. A front-end component may also be provided on the chassis 100. The front-end component 101 is located at the front end of the first sill beam 104 and the second sill beam 105 along the driving direction, and the front ends of the first sill beam 104 and the second sill beam 105 are both connected to the front-end component 101. Correspondingly, the upper body structure 200 may be connected to the front-end component 101, the first sill beam 104, and the second sill beam 105 to realize the connection between the upper body structure 200 and the chassis 100.

[0114] Exemplarily, the front-end component 101 includes a front panel 103 and an instrument panel bracket 102. The front panel 103 may be connected to the front ends of the first sill beam 104 and the second sill beam 105. The instrument panel bracket 102 is provided on the front panel 103, and the instrument panel is installed on the instrument panel bracket 102. The upper body structure 200 includes a first side panel component (not shown), a second side panel component 201, and a roof 202. The tops of the first side panel component and the second side panel component 201 are both connected to the roof 202. The bottom end of the first side panel component is connected to the first sill beam 104, and the bottom end of the second side panel component 201 is connected to the second sill beam 105.

[0115] Among them, the second side panel component 201 includes a first support column 203 (A-pillar), a second support column 204 (B-pillar), and a third support column 205 (C-pillar). The tops of the first support column 203, the second support column 204, and the third support column 205 are all connected to the roof 202. The second support column 204 is located between the first support column 203 and the third support column 205. The upper body structure 200 further includes a first connecting beam 206 and a second connecting beam 207. One end of the first connecting beam 206 is connected to the bottom end of the first support column 203, and the other end of the first connecting beam 206 is connected to the bottom end of the second support column 204; one end of the second connecting beam 207 is connected to the second support column 204, and the other end of the second connecting beam 207 is connected to the bottom end of the third support column 205. Both the first connecting beam 206 and the second connecting beam 207 are connected to the second sill beam 105.

[0116] In the second side wall assembly 201, a first door frame 208 is formed by a first support column 203, a second support column 204, a first connecting beam 206 and a vehicle roof 202. The first door frame 208 is used for installing a first vehicle door. Correspondingly, a second door frame 209 is formed by the second support column 204, a third support column 205, a second connecting beam 207 and the vehicle roof 202. The second door frame 209 is used for installing a second vehicle door.

[0117] It can be understood that the structure of the first side wall assembly is substantially the same as that of the second side wall assembly 201. The difference between the first side wall assembly and the second side wall assembly 201 is that both the first connecting beam 206 and the second connecting beam 207 in the first side wall assembly are connected to the first sill beam 104. Correspondingly, in the first side wall assembly, a third door frame is formed by the first support column 203, the second support column 204, the first connecting beam 206 and the vehicle roof 202. The third door frame is used for installing a third vehicle door; a fourth door frame is formed by the second support column 204, the third support column 205, the second connecting beam 207 and the vehicle roof 202. The fourth door frame is used for installing a fourth vehicle door.

[0118] In the above implementation, the vehicle roof 202, the front wall panel 103, the first sill beam 104, the second sill beam 105, the first support column 203 and the second support column 204 of the first side wall assembly, and the first support column 203 and the second support column 204 in the second side wall assembly 201 enclose a driver's cab, and the main and deputy drivers are located in the driver's cab to drive the electric vehicle 1. The vehicle roof 202, the first sill beam 104, the second sill beam 105, the second support column 204 and the third support column 205 of the first side wall assembly, and the second support column 204 and the third support column 205 in the second side wall assembly 201 enclose a passenger cabin, and the passengers other than the main and deputy drivers are located in the passenger cabin.

[0119] Continue to refer to Figure 2 , in this embodiment, the chassis 100 may further include at least one cross beam 107 located between the first sill beam 104 and the second sill beam 105. One end of the cross beam 107 is connected to the first sill beam 104, and the other end of the cross beam 107 is connected to the second sill beam 105. The cross beam 107 connecting the first sill beam 104 and the second sill beam 105 can improve the overall strength of the body-in-white 10.

[0120] Figure 3 For the connection schematic diagram of the first sill beam and the second sill beam in the chassis provided by the embodiment of the present application with the front wall assembly, please refer to Figure 3, in this embodiment, the second sill beam 105 includes a first inner beam 1052 and a first outer beam 1051. The first inner beam 1052 is located on the side of the first outer beam 1051 close to the first sill beam 104. The first inner beam 1052 is connected to the front enclosure assembly 101, and the first outer beam 1051 is detachably connected to the front enclosure assembly 101. The first inner beam 1052 and the first outer beam 1051 are also detachably connected to each other.

[0121] In this embodiment, Figure 1 As shown, the front ends of the first sill beam 104 and the second sill beam 105 of the white body 10 are both connected to the front enclosure assembly 101. The second sill beam 105 includes a first inner beam 1052 and a first outer beam 1051. The front end of the first inner beam 1052 is connected to the front enclosure assembly 101, and the front end of the first outer beam 1051 is detachably connected to the front enclosure assembly 101. The first inner beam 1052 and the first outer beam 1051 are also detachably connected to each other. In this way, when the electric vehicle 1 undergoes a side collision, since the first outer beam 1051 is located outside the white body 10, the first outer beam 1051 is deformed after being collided. After the first outer beam 1051 is deformed, the first outer beam 1051 can be detached from the front enclosure assembly 101, and then the first outer beam 1051 can be replaced without disassembling the entire second sill beam 105, thereby reducing the maintenance difficulty of the electric vehicle 1.

[0122] Exemplarily, the first inner beam 1052 can be directly connected to the front enclosure assembly 101 by welding, snap connection, or bolt connection, etc. Of course, the first inner beam 1052 and the front enclosure assembly 101 can also be indirectly connected through other components. This embodiment does not limit the connection between the first inner beam 1052 and the front enclosure assembly 101, as long as the fixation between the first inner beam 1052 and the front enclosure assembly 101 can be achieved.

[0123] Figure 4 It is a schematic diagram of the connection between the second sill beam and the front enclosure assembly in the chassis provided by the embodiment of the present application. Figure 5 For Figure 4 a schematic diagram of the connection between the first outer beam and the front enclosure assembly in Figure 4 and Figure 5 . This embodiment does not limit the detachable connection between the front end of the first outer beam 1051 and the front enclosure assembly 101. Exemplarily, the chassis 100 may further include a sill connection portion 106, and one end of the sill connection portion 106 can be connected to Figure 2The front bulkhead 103 shown is connected, and the other end of the sill connection part 106 can be detachably connected to both the first outer beam 1051 and the first inner beam 1052 through a first threaded connection member. With this arrangement, the first outer beam 1051 and the first inner beam 1052 are connected to the sill connection part 106 through the same fastening bolt, simplifying the structure of the chassis 100. In addition, the installation of the first outer beam 1051 and the first inner beam 1052 can be achieved by installing the first threaded connection member, which also reduces the assembly complexity of the chassis 100.

[0124] It can be understood that the first threaded connection member may include a first fastening bolt 1061. With this arrangement, the structure is simple and easy to manufacture. Of course, the first threaded connection member may also include a first screw. Correspondingly, a first screw hole may be provided on the first inner beam 1052. The first screw passes through the sill connection part 106 and the first outer beam 1051 in sequence and then cooperates with the first screw hole, which can also achieve the detachable connection between the sill connection part 106 and the first outer beam 1051 and the first inner beam 1052.

[0125] Figure 6 For the structural schematic diagram of the chassis provided by the embodiment of the present application in which the first outer beam is inserted into the first insertion channel and the first inner beam is inserted into the second insertion channel, please refer to Figure 6 In the above implementation manner, a first insertion channel 1063 and a second insertion channel 1064 are provided on the sill connection part 106. The centerlines of the first insertion channel 1063 and the second insertion channel 1064 are in the same horizontal plane, and the centerlines of the first insertion channel 1063 and the second insertion channel 1064 are parallel and spaced. The front end of the first inner beam 1052 is inserted into the first insertion channel 1063, and the front end of the first outer beam 1051 is inserted into the second insertion channel 1064. With this arrangement, while the first inner beam 1052 and the second inner beam 1042 are connected to the sill connection part 106 through the first threaded connection member as shown in Figure 3 , the first inner beam 1052 is inserted into the first insertion channel 1063, and the first outer beam 1051 is inserted into the second insertion channel 1064, which can improve the connection force between the first inner beam 1052 and the first outer beam 1051 and the sill connection part 106.

[0126] It can be understood that in the implementation manner where the first threaded connector includes the first fastening bolt 1061, a first through hole penetrating through the first insertion channel 1063 and the second insertion channel 1064 is provided on the sill connection portion 106, and the first through hole can be vertically arranged with respect to the center lines of the first insertion channel 1063 and the second insertion channel 1064; correspondingly, a second through hole is provided at the front end of the first inner beam 1052, and a third through hole is provided at the front end of the first outer beam 1051. The center lines of the first through hole, the second through hole, and the third through hole are collinear, and the first fastening bolt 1061 is inserted into the first through hole, the second through hole, and the third through hole. With such a setting, the structure is simple and convenient to manufacture.

[0127] After passing through the first through hole, the second through hole, and the third through hole, the first fastening bolt 1061 can cooperate with a nut to achieve the fixation between the first outer beam 1051, the first inner beam 1052, and the sill connection portion 106.

[0128] In the above implementation manner, a groove (not shown) can be provided on the surface of the sill connection portion 106 facing away from the first sill beam 104, the first hole penetrates through the bottom of the groove, and the head of the first fastening bolt 1061 or the nut cooperating with the first fastening bolt 1061 is accommodated in the groove. With such a setting, it is possible to prevent the head of the first fastening bolt 1061 or the nut from protruding from the surface of the sill connection portion 106 facing away from the first sill beam 104, thereby avoiding the head of the first fastening bolt 1061 or the nut from affecting the installation of other parts.

[0129] Figure 7 Schematic diagram of the chassis provided in this embodiment, Figure 8 is Figure 7 the cross-sectional view taken along the A-A direction in, please refer to Figure 7 and Figure 8 . In this embodiment, Figure 1 a battery cell 30 is further provided on the white body 10 shown. The battery cell 30 is electrically connected to the electric motor to supply power to the electric motor. It can be understood that there can be multiple battery cells 30, and the multiple battery cells 30 can be connected in series or in parallel to provide a suitable voltage and sufficient energy for the electric motor to ensure that the electric vehicle 1 has a long cruising range.

[0130] The battery cell 30 can be installed on the chassis 100. Correspondingly, the chassis 100 can be of the structure with the battery cell integrated onto the chassis (Cell to Chassis TCT), or the chassis 100 can be of the structure with the battery cell integrated onto the vehicle body (Cell to Body CTB). Specifically, an installation space 60 for accommodating the battery cell 30 is formed between the first inner beam 1052 and the first sill beam 104. That is to say, the battery cell 30 is installed between the first inner beam 1052 and the first sill beam 104. With such an arrangement, the space utilization rate of the chassis 100 can be improved, and thus the structural compactness of the electric vehicle 1 can be enhanced.

[0131] The chassis 100 further includes an upper cover 40 and a lower cover 50. The upper cover 40 is connected to the first inner beam 1052 and the first sill beam 104, and the lower cover 50 is connected to the first inner beam 1052 and the first sill beam 104. The lower cover 40 is located below the upper cover 50. The upper cover 40 and the lower cover 50 can enclose the installation space 60 so that the upper cover 40, the lower cover 50, the first inner beam 1052, and the first sill beam 104 form a battery pack for accommodating the battery cell 30. With such an arrangement, the upper cover 40, the lower cover 50, the first inner beam 1052, and the first sill beam 104 of the chassis 100 (as Figure 2 shown) form a battery pack for accommodating the battery cell 30, eliminating the need for an additional battery pack for accommodating the battery cell 30, further improving the space utilization rate of the chassis 100 and enhancing the structural compactness of the electric vehicle 1. Additionally, without the need for an additional battery pack for accommodating the battery cell 30, the self-weight of the electric vehicle 1 ( Figure 1 shown) can be reduced, thereby increasing the driving range of the electric vehicle 1. When a side collision occurs and causes the first outer beam 1051 to deform, since the upper cover 40, the lower cover 50, the first inner beam 1052, and the first sill beam 104 form a battery pack for accommodating the battery cell 30, the sealing performance of the battery pack will not be damaged during the process of replacing the first outer beam 1051, further reducing the maintenance difficulty of the electric vehicle.

[0132] It can be understood that in the implementation manner where the chassis 100 further includes the cross beam 107 as Figure 2 described, one end of the cross beam 107 is connected to the first inner beam 1052, and the other end of the cross beam 107 is connected to the first sill beam 104. Correspondingly, the upper cover 40 and the lower cover 50 are also connected to the cross beam 107. The upper cover 40, the lower cover 50, the first inner beam 1052, the first sill beam 104, and the cross beam 107 form a battery pack.

[0133] Continue to refer to Figure 8, in some implementations, the upper cover 40 can be welded between the first inner beam 1052 and the first sill beam 104 to ensure the sealing of the battery pack; correspondingly, the lower cover 50 can be detachably connected to the first inner beam 1052 and the first sill beam 104 by means of bolt connection, and then the lower cover 50 can be detached from the first inner beam 1052 and the first sill beam 104 to facilitate the installation or removal of the battery cell 30. An adhesive can be filled between the lower cover 50 and the first inner beam 1052 and the first sill beam 104 to improve the connection force between the lower cover 50 and the first inner beam 1052 and the first sill beam 104 while improving the sealing between the lower cover 50 and the first inner beam 1052 and the first sill beam 104, and ensure the sealing of the battery pack.

[0134] Continue to refer to Figure 8 , in other implementations, the lower cover 50 can be welded between the first inner beam 1052 and the first sill beam 104 to ensure the sealing of the battery pack; correspondingly, the upper cover 40 can be detachably connected to the first inner beam 1052 and the first sill beam 104 by means of bolt connection, and then the upper cover 40 can be detached from the first inner beam 1052 and the first sill beam 104 to facilitate the installation or removal of the battery cell 30. An adhesive can be filled between the upper cover 40 and the first inner beam 1052 and the first sill beam 104 to improve the connection force between the upper cover 40 and the first inner beam 1052 and the first sill beam 104 while improving the sealing between the upper cover 40 and the first inner beam 1052 and the first sill beam 104, and ensure the sealing of the battery pack.

[0135] In this embodiment, the upper cover 40 can be used as the floor of the cab and the passenger compartment. In this way, there is no need to additionally set a floor to further improve the structural compactness of the electric vehicle 1 as shown in Figure 1 , and at the same time, the self-weight of the electric vehicle 1 can be further reduced.

[0136] Continue to refer to Figure 6 , in the implementation where the first inner beam 1052 is inserted into the first insertion channel 1063 of the sill connection portion 106 and the first outer beam 1051 is inserted into the second insertion channel 1064 of the sill connection portion 106, a sealant 1065 can be filled between the side wall of the first inner beam 1052 and the first insertion channel 1063, and the same sealant 1065 is also filled between the side wall of the first outer beam 1051 and the second insertion channel 1064 to further improve the sealing of the battery pack and thus avoid the influence of the external environment on the operation of the battery cell 30.

[0137] Figure 9 For the structural schematic diagram of the chassis in the related art, please refer to Figure 9, In the related art, the chassis includes a first sill beam (not shown) and a second sill beam 105. An installation space 60 is formed between the first sill beam and the second sill beam 105. The battery cell 30 is disposed in the installation space 60. The upper cover 40 is located above the lower cover 50, and both the upper cover 40 and the lower cover 50 are connected to the first sill beam and the second sill beam 105. The upper cover 40 and the lower cover 50 enclose the installation space 60, so that the upper cover 40, the lower cover 50, the first sill beam, and the second sill beam 105 form a battery pack. When a side collision occurs in an electric vehicle, since the second sill beam 105 is located on the outer side of the chassis, it is subjected to a large force and is prone to deformation; during maintenance, the entire second sill beam 105 needs to be disassembled, and it is relatively difficult to disassemble the second sill beam 105. At the same time, disassembling the second sill beam 105 will cause the seal of the battery pack to fail, making the maintenance of the electric vehicle more difficult. In contrast, as Figure 3 shown, in this embodiment, the second sill beam 105 includes a first inner beam 1052 and a first outer beam 1051. The front end of the first inner beam 1052 is connected to the front panel assembly 101, and the front end of the first outer beam 1051 is detachably connected to the front panel assembly 101. When a side collision occurs in the electric vehicle 1, the first outer beam 1051 is deformed after being collided; after the first outer beam 1051 is deformed, the first outer beam 1051 can be disassembled from the front panel assembly 101, and then the first outer beam 1051 can be replaced without disassembling the entire second sill beam 105, and disassembling the first outer beam 1051 does not affect the sealing performance of the battery pack, thereby reducing the maintenance difficulty of the electric vehicle 1. In addition, compared with replacing the entire second sill beam 105, for the white body 10 provided in this embodiment, only the first outer beam 1051 needs to be replaced, that is, a part of the second sill beam 105 is replaced, thereby reducing the maintenance cost.

[0138] Figure 10 Structural schematic of the first outer beam including an energy absorption structure in the chassis provided by the embodiment of the present application Figure 1 , as Figure 10 shown, in the above implementation manner, the first outer beam 1051 includes an energy absorption structure 70. The energy absorption structure 70 is used to absorb the impact force perpendicular to the driving direction; that is, the energy absorption structure 70 is used to absorb the side collision force of the electric vehicle 1. This embodiment does not limit the energy absorption structure 70, as long as it can absorb the side collision force. The side collision force can be absorbed by the energy absorption structure 70, thereby preventing other parts from being damaged during the collision.

[0139] Continuing to refer to Figure 10 , in some embodiments, an energy absorption channel with a center line parallel to the driving direction may be provided in the first outer beam 1051. Correspondingly, the energy absorption structure 70 includes a plurality of energy absorption plates 701 disposed in the energy absorption channel. The plurality of energy absorption plates 701 divide the energy absorption channel into a plurality of energy absorption cavities; in the electric vehicle 1 (such as Figure 1When a side collision occurs, the first outer beam 1051 is stressed, and each energy absorbing plate 701 is deformed to absorb the impact force. Further, fillers can be filled in each energy absorbing cavity to further improve the absorption capacity of the impact force; for example, the fillers can include foamed aluminum, rubber, etc.

[0140] Figure 11 A schematic diagram of a structure in which the first outer beam of the chassis provided in an embodiment of the present application includes an energy absorbing structure Figure 2 ,like Figure 11 As shown, in other embodiments, the first outer beam 1051 includes a main body 703, and the energy absorbing structure 70 includes an energy absorbing shell 702 covering the outside of the main body 703. Figure 1 When a side collision occurs, the first outer beam 1051 is stressed, and the energy absorbing shell 702 is deformed to absorb the impact force. Accordingly, a filler may be filled between the energy absorbing shell 702 and the main body 703 to further improve the ability to absorb the impact force; for example, the filler may include foamed aluminum, rubber, etc.

[0141] Continue to refer to Figure 2 In some embodiments, the body in white 10 further includes a first rear beam 108 and a second rear beam 109, the first rear beam 108 and the second rear beam 109 are located in the same horizontal plane, the front end of the first rear beam 108 is connected to the rear end of the first threshold beam 104, and the front end of the second rear beam 109 is connected to the second threshold beam 105. Specifically, the first inner beam 1052 is connected to the front end of the second rear beam 109, and the first outer beam 1051 is detachably connected to the front end of the second rear beam 109, so that when the first outer beam 1051 is damaged by a side impact, the first outer beam 1051 can be disassembled to facilitate the replacement of the first outer beam 1051, thereby reducing the electric vehicle 1 (such as Figure 1 The difficulty of maintenance is shown).

[0142] Continue to refer to Figure 3 Exemplarily, a threshold fixing portion 1081 is provided at the front end of the second rear beam 109 , and the first outer beam 1051 and the first inner beam 1052 can be connected to the threshold fixing portion 1081 by fixing bolts 1084 .

[0143] Further, Figure 12 A schematic diagram of the connection between the second sill beam and the second rear beam in the chassis provided in an embodiment of the present application is shown in FIG. Figure 12As shown, a third insertion channel 1082 and a fourth insertion channel 1083 are provided on the sill fixing part 1081. The centerlines of the third insertion channel 1082 and the fourth insertion channel 1083 are both parallel to the horizontal plane. The first inner beam 1052 is inserted into the third insertion channel 1082, and the first outer beam 1051 is inserted into the fourth insertion channel 1083 to improve the connection force between the first outer beam 1051 and the first inner beam 1052 and the second rear beam 109. Grooves may also be provided on the surface of the sill fixing part 1081 facing away from the first sill beam 104. The head of the corresponding fixing bolt 1084 or the nut cooperating with the fixing bolt 1084 is received in the groove. In this way, it is possible to prevent the head of the fixing bolt 1084 or the nut cooperating with the fixing bolt 1084 from protruding from the surface of the sill fixing part 1081 facing away from the first sill beam 104, so as to avoid affecting the installation of other parts.

[0144] In the implementation manner where the upper cover 40, the lower cover 50, the first inner beam 1052, and the first sill beam 104 form a battery pack (as Figure 8 shown), sealant 1065 is filled between the side walls of the first outer beam 1051 and the fourth insertion channel 1083, and between the side walls of the first inner beam 1052 and the third insertion channel 1082. Such a setting can improve the sealing of the battery pack.

[0145] Figure 13 Schematic diagram of the connection between the first outer beam and the first inner beam in the chassis provided by the embodiment of the present application Figure 1 Please refer to Figure 13 In the white body 10 provided in this embodiment (as Figure 2 shown), the first outer beam 1051 and the first inner beam 1052 can be connected in a detachable manner. Such a setting can improve the overall stiffness of the chassis 100.

[0146] Exemplarily, the first outer beam 1051 and the first inner beam 1052 can be connected by a second threaded connection member. Such a setting has a simple structure and is convenient for assembly. Of course, the first outer beam 1051 and the first inner beam 1052 can also be connected in a detachable manner such as by snap connection. This embodiment does not limit this.

[0147] It can be understood that the second threaded connection member may include a second fastening bolt 1053. Such a setting has a simple structure and is convenient for manufacturing. Of course, the second threaded connection member may also include a second screw. Correspondingly, a second screw hole may be provided on the first inner beam 1052. The second screw passes through the first outer beam 1051 in sequence and then cooperates with the second screw hole, and the detachable connection between the first outer beam 1051 and the first inner beam 1052 can also be achieved.

[0148] Connecting glue 1059 can also be filled between the first outer beam 1051 and the first inner beam 1052. The connecting glue 1059 is bonded to both the first outer beam 1051 and the first inner beam 1052. With this arrangement, the connection force between the first outer beam 1051 and the first inner beam 1052 can be improved.

[0149] Figure 14 Schematic diagram of the connection between the first outer beam and the first inner beam in the chassis provided by the embodiment of the present application Figure 2 , such as Figure 14 shown, in the implementation manner of connecting the first outer beam 1051 and the first inner beam 1052 through the second fastening bolt 1053, a fourth through hole is provided on the first outer beam 1051, a threaded hole is provided on the first inner beam 1052, and the second fastening bolt 1053 passes through the fourth through hole and mates with the threaded hole. With this arrangement, there is no need to provide a nut that mates with the second fastening bolt 1053, which simplifies the structure of the chassis 100 (as Figure 2 shown), and at the same time, the mass of the chassis 100 can also be reduced.

[0150] In the above implementation manner, a receiving groove can be provided on the side wall of the first outer beam 1051 facing away from the first inner beam 1052. The fourth through hole penetrates the bottom of the receiving groove, and the head of the second fastening bolt 1053 can be received in the receiving groove (countersunk head bolt), so that the head of the second fastening bolt 1053 can be prevented from protruding from the surface of the second outer beam 1051.

[0151] Figure 15 Schematic diagram of connecting the first outer beam and the first inner beam in the chassis provided by the embodiment of the present application through a plurality of second fastening bolts, as Figure 15 shown, the second fastening bolts 1053 can be multiple, and the multiple second fastening bolts 1053 can be arranged in an array, so that the connection force between the first outer beam 1051 and the first inner beam 1052 can be improved to further improve Figure 2 the overall strength of the white body 10 shown.

[0152] Figure 16 Schematic diagram of the connection between the first beam body and the second beam body in the chassis provided by the embodiment of the present application Figure 1 , please refer to Figure 16 , in the above implementation manner, the first outer beam 1051 can include a first beam body 1054 and a second beam body 1055. The first beam body 1054 and the second beam body 1055 can be arranged in sequence along the driving direction. The front end of the first beam body 1054 is connected to the front end assembly 101 (as Figure 2The detachable connection is shown. The rear end of the first beam body 1054 and the front end of the second beam body 1055 enclose a fourth through hole. That is to say, there is a gap between the rear end of the first beam body 1054 and the front end of the second beam body 1055, and the second fastening bolt 1053 is arranged in this gap. In the white body 10 including Figure 7 In the implementation manner of the first rear beam 108 and the second rear beam 109 as shown, the rear end of the second beam body 1055 can also be detachably connected to the sill fixing part 1081 on the second rear beam 109. Through the above settings, the first outer beam 1051 includes the first beam body 1054 and the second beam body 1055, that is, the first outer beam 1051 is a split structure. In this way, the first beam body 1054 and the second beam body 1055 can be disassembled separately, and the first beam body 1054 and the second beam body 1055 can be installed separately, which facilitates the disassembly and installation of the first outer beam 1051.

[0153] Continue to refer to Figure 16 , in some embodiments, the first outer beam 1051 further includes a connection block 1058. A fifth through hole is provided on the connection block 1058. A first recess 1056 is provided on the surface of the first beam body 1054 facing away from the first inner beam 1052. That is to say, the surface of the first beam body 1054 facing away from the first inner beam 1052 ( Figure 16 The lower surface in the shown orientation) and near the rear end is provided with a first recess 1056, and the first recess 1056 can penetrate the rear end of the first beam body 1054. Correspondingly, a second recess 1057 is provided on the surface of the second beam body 1055 facing away from the first inner beam 1052. That is to say, the surface of the second beam body 1055 facing away from the first inner beam 1052 ( Figure 16 The lower surface in the shown orientation) and near the front end is provided with a second recess 1057, and the second recess 1057 penetrates the front end of the second beam body 1055. The first recess 1056 and the second recess 1057 enclose a receiving groove, and the connection block 1058 is received in the receiving groove. The first fastening bolt 1061 sequentially passes through the fifth through hole and the fourth through hole and then cooperates with the threaded hole on the first inner beam 1052 to realize the connection between the first outer beam 1051 and the first inner beam 1052. Through the above settings, the connection block 1058 can press the first beam body 1054 and the second beam body 1055 against the first inner beam 1052, improving the connection force between the first inner beam 1052 and the first outer beam 1051; in addition, the connection block 1058 is received in the receiving groove, which can prevent the connection block 1058 from protruding from the surface of the first outer beam 1051 facing away from the first inner beam 1052, so as not to affect the installation of other parts.

[0154] Figure 17 Schematic diagram of the connection between the first beam body and the second beam body in the chassis provided by the embodiment of the present application Figure 2 , such as Figure 17As shown, in other embodiments, a first insertion portion 10511 is provided at the rear end of the first beam body 1054, and a second insertion portion 10513 is provided at the front end of the second beam body 1055. The first insertion portion 10511 is inserted into the second insertion portion 10513. Correspondingly, a fourth through hole 10515 penetrates through the first insertion portion 10511 and the second insertion portion 10513. Figure 14 The shown second fastening bolt 1053 passes through the fourth through hole 10515 and mates with a threaded hole on the first inner beam 1052 to realize the connection between the first outer beam 1051 and the first inner beam 1052. With such a setting, while the first beam body 1054 and the second beam body 1055 are connected to the first inner beam 1052 by the second fastening bolt 1053, the first insertion portion 10511 and the second insertion portion 10513 are inserted into each other, which can improve the connection force between the first beam body 1054 and the second beam body 1055 and the first inner beam 1052, and at the same time can also improve the connection force between the first beam body 1054 and the second beam body 1055.

[0155] In some implementation manners, the first insertion portion 10511 faces away from Figure 14 On the surface of the shown first inner beam 1052, a plugging groove 10512 is provided. The plugging groove 10512 extends along the driving direction and penetrates through the rear end of the first insertion portion 10511. The second insertion portion 10513 includes a plugging body 10514. The plugging body 10514 protrudes from the front end of the second beam body 1055 ( Figure 17 the left end in the shown orientation), and the plugging body 10514 is inserted into the plugging groove 10512. Correspondingly, the fourth through hole 10515 penetrates through the first insertion portion 10511 and the plugging body 10514.

[0156] Of course, in other implementation manners, Figure 18 is a schematic diagram of the connection between the first beam body and the second beam body in the white body provided by the embodiment of the present application Figure 3 , as Figure 18 shown, the first insertion portion 10511 includes a plugging body 10514 provided at the rear end of the first beam body 1054 ( Figure 18 the right end in the shown orientation), and the plugging body 10514 extends backward. Correspondingly, on the surface of the second insertion portion 10513 facing away from Figure 14 the shown first inner beam 1052, a plugging groove 10512 is provided. The plugging groove 10512 extends along the driving direction and penetrates through the front end of the second insertion portion 10513. The plugging body 10514 is inserted into the plugging groove 10512. Correspondingly, the fourth through hole 10515 penetrates through the plugging body 10514 and the second insertion portion 10513.

[0157] Continue to refer to Figure 3, in this embodiment, a white body 10 is provided. The first sill beam 104 includes a second inner beam 1042 and a second outer beam 1041. The second inner beam 1042 is located on the side of the second outer beam 1041 close to the second sill beam 105. The second inner beam 1042 is connected to the front panel assembly 101, and the second outer beam 1041 is detachably connected to the front panel assembly 101. With such a setting, when a side collision occurs to the electric vehicle 1, the second outer beam 1041 is deformed, and the second outer beam 1041 can be detached to facilitate the replacement of the second outer beam 1041, further reducing the maintenance difficulty of the electric vehicle 1.

[0158] The structure of the second inner beam 1042 is substantially the same as that of the first inner beam 1052, and the structure of the second outer beam 1041 is substantially the same as that of the first outer beam 1051, which will not be elaborated here. The front panel assembly 101 may include two sill connection parts 106. One of the sill connection parts 106 is connected to the second sill beam 105, and the other sill connection part 106 is connected to the first sill beam 104; and the connection structure between the first sill beam 104 and the sill connection part 106 is substantially the same as the connection structure between the second sill beam 105 and the sill connection part 106.

[0159] In the implementation manner where the white body 10 as shown in Figure 7 also includes a first rear beam 108 and a second rear beam 109, a sill fixing part 1081 is provided on the second rear beam 109. Similarly, a sill fixing part 1081 is also provided on the first rear beam 108, and the connection structure between the sill fixing part 1081 on the first rear beam 108 and the first sill beam 104 is substantially the same as the connection structure between the sill fixing part 1081 on the second rear beam 109 and the second sill beam 105, which will not be elaborated here.

[0160] As shown in Figure 8 , the battery cell 30 is located between the first inner beam 1052 and the second inner beam 1042. At this time, the first inner beam 1052, the second inner beam 1042, the upper cover 40, and the lower cover 50 form a battery pack for accommodating the battery cell. With such a setting, there is no need to additionally provide a battery pack, which can further improve the structural compactness of the electric vehicle 1 as shown in Figure 1 , and at the same time reduce the mass of the electric vehicle 1.

[0161] The above is only the specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A chassis, characterized in that, Comprising: A first sill beam, the front end of which is used to connect with the front panel assembly; A second sill beam, both the first sill beam and the second sill beam extending along the driving direction; The second sill beam includes: a first inner beam and a first outer beam, the first inner beam being located on the side of the first outer beam close to the first sill beam, the first inner beam being used to connect with the front panel assembly; the first outer beam being used to detachably connect with the front panel assembly; the first outer beam being detachably connected with the first inner beam; A sill connection part, which is used to connect with the front panel assembly, and the sill connection part is detachably connected with both the first inner beam and the first outer beam through a first threaded connector; The sill connection part is provided with a first insertion channel and a second insertion channel, the front end of the first inner beam being inserted into the first insertion channel, and the front end of the first outer beam being inserted into the second insertion channel.

2. The chassis according to claim 1, characterized in that, The sill connection part is provided with a first through hole penetrating through the first insertion channel and the second insertion channel, the center line of the first through hole being perpendicular to the center lines of the first insertion channel and the second insertion channel, the front end of the first inner beam being provided with a second through hole, and the front end of the first outer beam being provided with a third through hole, and the first threaded connector being inserted through the first through hole, the second through hole and the third through hole.

3. The chassis according to claim 1 or 2, characterized in that, There is an installation space for accommodating the battery cell between the first inner beam and the first sill beam.

4. The chassis according to claim 3, characterized in that, The chassis further includes: An upper cover, which is connected with the first inner beam and the first sill beam; A lower cover, which is connected with the first inner beam and the first sill beam; The upper cover and the lower cover are used to enclose the installation space, and the upper cover, the lower cover, the first inner beam and the first sill beam form a battery pack for accommodating the battery cell.

5. The chassis according to claim 4, characterized in that, Sealant is filled between the side walls of the first inner beam and the first insertion channel, and between the side walls of the first outer beam and the second insertion channel.

6. The chassis according to any one of claims 1-5, characterized in that, A groove is provided on the surface of the sill connection part facing away from the first sill beam; the first threaded connector includes a first fastening bolt, and the head of the first fastening bolt or the nut cooperating with the first fastening bolt is accommodated in the groove.

7. The chassis according to any one of claims 1-6, characterized in that, The first outer beam is detachably connected with the first inner beam.

8. The chassis according to claim 7, characterized in that, The first outer beam and the first inner beam are also detachably connected through a second threaded connector.

9. The chassis according to claim 8, characterized in that, A fourth through hole is provided on the first outer beam, a threaded hole is provided on the first inner beam, the second threaded connector includes a second fastening bolt, the second fastening bolt passes through the fourth through hole, and the second fastening bolt cooperates with the threaded hole.

10. The chassis according to claim 9, characterized in that, The first outer beam includes: A first beam body; A second beam body, the first beam body and the second beam body being arranged in sequence along the driving direction, the front end of the first beam body being used to detachably connect with the front panel assembly, and the fourth through hole being formed by enclosing between the rear end of the first beam body and the front end of the second beam body.

11. The chassis according to claim 10, characterized in that, The first outer beam further includes: A connecting block, on which a fifth through hole is provided; A first recess is provided on a surface of the first beam body facing away from the first inner beam, and a second recess is provided on a surface of the second beam body facing away from the first inner beam. The first recess and the second recess enclose a receiving groove; the connecting block is received in the receiving groove, and the second fastening bolt is inserted through the fifth through hole.

12. The chassis according to claim 10 or 11, characterized in that, A first insertion portion is provided at a rear end of the first beam body, and a second insertion portion is provided at a front end of the second beam body. The first insertion portion is inserted into the second insertion portion; the fourth through hole penetrates through the first insertion portion and the second insertion portion.

13. The chassis according to claim 12, characterized in that, A plugging groove is provided on a surface of the first insertion portion facing away from the first inner beam. The plugging groove extends in a traveling direction and penetrates through a rear end of the first insertion portion; the second insertion portion includes a plugging body which is inserted into the plugging groove.

14. The chassis according to any one of claims 1-13, characterized in that, Connecting glue is filled between the first inner beam and the first outer beam.

15. The chassis according to any one of claims 1-14, characterized in that, The first outer beam includes an energy absorption structure which is configured to absorb an impact force perpendicular to the traveling direction.

16. The chassis according to any one of claims 1-15, characterized in that, The first sill beam includes: A second inner beam and a second outer beam. The second inner beam is located on a side of the second outer beam close to the second sill beam. The second inner beam is configured to be connected to the front end assembly, and the second outer beam is configured to be detachably connected to the front end assembly.

17. A body-in-white, characterized in that, Comprising: The chassis according to any one of claims 1-16; An upper body structure which is disposed on an upper portion of the chassis. The upper body structure and the chassis enclose a cab.

18. An electric vehicle, characterized in that, Comprising: The white body according to claim 17; Wheels which are disposed on the white body; A power system which is in transmission connection with the wheels; A battery cell which is disposed between the first inner beam and the first sill beam. The battery cell is electrically connected to the power system.

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