Vehicle body structure and vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle body structure and a vehicle. The embodiment of the invention provides a vehicle body structure which comprises two threshold beams, a floor, a rear seat support and a battery pack, and the two threshold beams are arranged in a spaced mode in the left-right direction of a vehicle; the floor is connected with the two doorsill beams; the rear seat bracket is arranged on the upper side of the floor; the battery pack comprises a battery cell module and a battery pack cross beam, the battery pack cross beam is arranged on the lower side of the floor and is opposite to the rear seat support, the two ends of the battery pack cross beam are connected with the two threshold beams respectively in the left-right direction of the vehicle, and the battery cell module is connected with the battery pack cross beam. The weight of a vehicle body can be reduced, and cost is reduced.

Description

Body structure and vehicle Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a vehicle body structure and a vehicle. Background Technology

[0002] New energy vehicles mainly include pure electric vehicles, range-extended electric vehicles, and plug-in hybrid electric vehicles. Currently, the battery packs of new energy vehicles are usually of an integral structure, fixed to the bottom of the vehicle body by two crossbeams or longitudinal beams, while the rear crossbeam of the seat is fixed to the floor, mainly used to support the seat frame. Because the fixing crossbeams or longitudinal beams of the battery pack are independent of the rear crossbeam of the seat, the vehicle body is relatively heavy and the cost is high. Summary of the Invention

[0003] This application provides a vehicle body structure and a vehicle that can reduce the weight of the vehicle body and reduce costs.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include: Firstly, embodiments of this application provide a vehicle body structure, including two sill beams, a floor, a rear seat bracket, and a battery pack. The two sill beams are spaced apart along the left-right direction of the vehicle. The floor is connected to the two sill beams. The rear seat bracket is located on the upper side of the floor. The battery pack includes a cell module and a battery pack crossbeam. The battery pack crossbeam is located on the lower side of the floor and is opposite to the rear seat bracket. Along the left-right direction of the vehicle, both ends of the battery pack crossbeam are connected to the two sill beams respectively. The cell module is connected to the battery pack crossbeam.

[0005] The vehicle body structure proposed in this application, in which the battery pack crossbeam replaces the rear seat crossbeam and supports both the battery cell module and the rear seat bracket, can reduce the weight of the vehicle body structure and lower costs. Furthermore, the connection between the battery pack crossbeam and the sill beam can improve the torsional stiffness of the vehicle body structure and enhance the force transmission in side or pole impacts. When the vehicle body is subjected to a side or pole impact, the force on the impacted sill beam can be quickly dispersed, reducing the deformation of the passenger compartment in the vehicle body structure.

[0006] Optionally, the battery pack crossbeam is fixed to the floor via a mounting bracket, and the mounting bracket is positioned opposite to the rear seat bracket along the vertical direction of the vehicle.

[0007] In the above embodiment, the mounting bracket is located on the underside of the floor to fix the battery pack crossbeam to the floor, thereby increasing the connection strength between the battery pack crossbeam and the floor. Furthermore, after the rear seat is installed on the rear seat bracket, the battery pack crossbeam can support the rear seat, thus improving the installation strength and rigidity of the rear seat bracket and the rear seat.

[0008] Optionally, there are multiple mounting brackets, which are spaced apart along the left-right direction of the vehicle; there are multiple rear seat brackets, which are arranged one-to-one with the mounting brackets along the up-down direction of the vehicle.

[0009] In the above embodiment, the battery pack beam is connected to the floor through multiple hanging point brackets, thereby improving the connection strength between the battery pack beam and the floor.

[0010] Optionally, the plurality of mounting brackets include a first mounting bracket and a second mounting bracket, the first mounting bracket and the second mounting bracket being located on both sides of the battery pack crossbeam along the left-right direction of the vehicle; the vehicle body structure also includes a left seat belt reinforcement plate and a right seat belt reinforcement plate, the left seat belt reinforcement plate and the right seat belt reinforcement plate being disposed on the upper side of the floor along the vertical direction of the vehicle, the left seat belt reinforcement plate being disposed opposite to the first mounting bracket, and the right seat belt reinforcement plate being disposed opposite to the second mounting bracket.

[0011] In the above embodiment, along the vertical direction of the vehicle, the left seat belt reinforcement plate, the first mounting bracket and the corresponding rear seat bracket are arranged opposite to each other, and the right seat belt reinforcement plate, the second mounting bracket and the corresponding rear seat bracket are arranged opposite to each other. This improves the connection strength between the battery pack crossbeam and the floor, thereby improving the installation strength and rigidity of the rear seat bracket, and also improving the load-bearing rigidity and collision safety of the rear seat, the left seat belt reinforcement plate and the right seat belt reinforcement plate.

[0012] Optionally, the floor, the rear seat bracket, and the hanging point bracket are welded together.

[0013] In the above embodiment, the mounting bracket is integrated with the floor and the rear seat bracket, making the battery pack crossbeam integrated with the rear seat bracket, thereby improving the installation strength and rigidity of the rear seat bracket.

[0014] Optionally, the vehicle body structure also includes mounting brackets, and both ends of the battery pack crossbeam are fixed to the corresponding door sill beams via the mounting brackets.

[0015] In the above embodiments, the battery pack crossbeam is fixed to the sill beam by a mounting bracket, thereby connecting the battery pack crossbeam and the sill beam into an integrated structure, which improves the strength and rigidity of the vehicle body structure and enhances the force transmission performance of the vehicle body structure in side impacts and pole impacts.

[0016] Optionally, the vehicle body structure further includes a front bulkhead crossbeam lower plate, disposed between two sill beams and connected to the floor; the battery pack further includes a first beam and a second beam, both of which are disposed on the underside of the floor. The first beam is connected to the front bulkhead crossbeam lower plate and extends along the left-right direction of the vehicle. Along the front-rear direction of the vehicle, the first beam and the battery pack crossbeam are spaced apart, and the second beam is connected between the first beam and the battery pack crossbeam. The battery cell module is connected to the first beam and the second beam.

[0017] In the above embodiments, the first beam, the second beam, and the battery pack crossbeam serve as the supporting structure for the battery cell module, providing a stable mounting base for the battery cell module. At the same time, connecting the first beam to the lower plate of the front crossbeam and connecting the battery pack crossbeam to the sill beam and the floor can improve the strength of the vehicle body structure, increase the torsional stiffness of the vehicle body structure, and thus improve the side impact and pole impact performance of the vehicle body structure. When the vehicle is involved in a collision, it can disperse the collision energy to other parts of the vehicle body.

[0018] Optionally, the vehicle body structure further includes a battery pack sealing beam, with both ends of the battery pack sealing beam connected to the two sill beams respectively along the left-right direction of the vehicle, and the battery pack sealing beam located on the rear side of the battery pack beam; the battery pack also includes a battery pack lower housing, which is sealed to the lower side of the two sill beams, the lower side of the front bulkhead beam lower plate, and the lower side of the battery pack sealing beam, so as to seal the cell module, the battery pack beam, the first beam, and the second beam between the floor and the battery pack lower housing.

[0019] In the above embodiments, the battery pack sealing beam is located on the rear side of the battery pack beam and is used for sealing connection with the lower housing of the battery pack. The position of the battery pack sealing beam can be moved according to the size of the battery pack, thereby meeting the development needs of different power capacities and making the vehicle body structure highly flexible and compatible.

[0020] Optionally, the cell module includes a liquid cooling plate and a battery cell assembly. The liquid cooling plate is disposed on the side of the first beam, the second beam, and the battery pack crossbeam away from the floor, and the battery cell assembly is disposed above the liquid cooling plate.

[0021] In the above embodiment, the liquid cooling plate is connected to the "I"-shaped bracket formed by the first beam, the second beam and the battery pack crossbeam to form a support structure for the battery cell group, which simplifies the battery pack setup. Furthermore, the first beam, the second beam and the battery pack crossbeam form a frame structure with the two threshold beams, which improves the installation strength of the battery cell group and thus enhances the stability of the battery cell group.

[0022] Optionally, the two sill beams include a first sill beam and a second sill beam. The first sill beam and the lower housing of the battery pack enclose a first chamber for accommodating an exhaust pipe, and the second sill beam and the lower housing of the battery pack enclose a second chamber for accommodating a drainage pipe. The upper wall of the first chamber is located above the upper wall of the second chamber.

[0023] In the above embodiment, the two sill beams are designed asymmetrically to provide an installation channel for the exhaust pipe.

[0024] Secondly, embodiments of this application provide a vehicle including the body structure described in any of the above embodiments. The vehicle in this application has the beneficial effects of the body structure described in any of the above embodiments; integrating the rear seat crossbeam and the battery pack crossbeam can achieve weight reduction and cost reduction of the body structure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 is a structural schematic diagram of the vehicle body structure in one embodiment of this application; Figure 2 is a top view of the vehicle body structure in one embodiment of this application; Figure 3 is a cross-sectional view of section AA in Figure 2 of this application; Figure 4 is a partial structural schematic diagram of the battery pack in one embodiment of this application; Figure 5 is a bottom view of the vehicle body structure in one embodiment of this application.

[0027] [Explanation of reference numerals in the attached diagram] 1. Sill beam; 11. First sill beam; 12. Second sill beam; 13. First chamber; 14. Second chamber; 2. Floor; 3. Rear seat bracket; 4. Battery pack; 42. Battery pack crossbeam; 43. First beam; 44. Second beam; 45. Lower housing of battery pack; 5. Mounting bracket; 51. First mounting bracket; 52. Second mounting bracket; 61. Left seat belt reinforcement plate; 62. Right seat belt reinforcement plate; 7. Mounting bracket; 8. Lower plate of front crossbeam; 9. Battery pack sealing crossbeam; X: Front-rear direction; Y: Left-right direction; Z: Up-down direction. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0030] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0034] In a first aspect, referring to Figures 1 to 3, an embodiment of this application provides a vehicle body structure, which includes two sill beams 1, a floor 2, a rear seat bracket 3, and a battery pack 4. The two sill beams 1 are spaced apart along the left-right direction Y of the vehicle; the floor 2 is connected to the two sill beams 1; the rear seat bracket 3 is located on the upper side of the floor 2; the battery pack 4 includes a cell module and a battery pack crossbeam 42, which is located on the lower side of the floor 2 and is opposite to the rear seat bracket 3. Along the left-right direction Y of the vehicle, both ends of the battery pack crossbeam 42 are connected to the two sill beams 1 respectively, and the cell module is connected to the battery pack crossbeam 42.

[0035] The rear seat bracket 3 is located on the upper side of the floor 2 for mounting the rear seats. The battery pack crossbeam 42 is located on the lower side of the floor 2 for mounting and supporting the battery cell modules. The battery pack crossbeam 42 is connected to the sill beam 1 and the floor 2, allowing the battery cell modules to be mounted to the vehicle body and stably held in place, thereby reducing vibration and improving stability. Positioning the battery pack crossbeam 42 on the lower side of the floor 2, opposite to the rear seat bracket 3, ensures that the battery pack crossbeam 42 not only supports the battery cell modules but also provides structural support for the rear seat bracket 3 and the rear seats.

[0036] For example, the vehicle body structure also includes a front seat crossbeam with a front seat bracket on it, and the front seat crossbeam and the battery pack crossbeam 42 are spaced apart along the longitudinal direction X of the vehicle.

[0037] The vehicle body structure proposed in this application embodiment replaces the rear seat crossbeam with a battery pack crossbeam 42, simultaneously supporting the battery cell module and the rear seat bracket 3, thereby reducing the weight and cost of the vehicle body structure. Furthermore, the battery pack crossbeam 42 is connected to the sill beam 1, which improves the torsional stiffness of the vehicle body structure and enhances the force transmission in side or pole impacts. When the vehicle body is subjected to a side or pole impact, the impact force is transmitted to the sill beam 1, which in turn transmits the impact force to the battery pack crossbeam 42. The battery pack crossbeam 42 can rapidly disperse the force received by the impacted sill beam 1, thereby reducing the deformation of the passenger compartment in the vehicle body structure.

[0038] Optionally, referring to Figure 3, the battery pack crossbeam 42 is fixed to the floor 2 via the mounting bracket 5, and the mounting bracket 5 is positioned opposite to the rear seat bracket 3 along the vertical direction Z of the vehicle.

[0039] The mounting bracket 5 is located on the underside of the floor 2 and is used to fix the battery pack crossbeam 42 to the floor 2, thereby increasing the connection strength between the battery pack crossbeam 42 and the floor 2. The mounting bracket 5 is positioned opposite the rear seat bracket 3, so that after the battery pack 4 is connected to the floor 2 via the mounting bracket 5, it can be positioned opposite the rear seat bracket 3. When the rear seat is installed on the rear seat bracket 3, the battery pack crossbeam 42 can support the rear seat, thereby increasing the installation strength and rigidity of the rear seat bracket 3 and the rear seat.

[0040] For example, the battery pack beam 42 is fixedly connected to the hanging point bracket 5 by bolts.

[0041] Optionally, referring to Figure 3, there are multiple mounting brackets 5, which are spaced apart along the left-right direction Y of the vehicle; there are multiple rear seat brackets 3, which are arranged one-to-one with the mounting brackets 5 along the up-down direction Z of the vehicle.

[0042] The battery pack crossbeam 42 is connected to the floor 2 via multiple mounting brackets 5, thereby increasing the connection strength between the battery pack crossbeam 42 and the floor 2. The multiple mounting brackets 5 correspond one-to-one with the multiple rear seat brackets 3, ensuring that each rear seat bracket 3 is positioned opposite the battery pack crossbeam 42. Each rear seat bracket 3 and its corresponding rear seat are supported by the battery pack crossbeam 42, thus improving the installation strength and rigidity of the rear seats.

[0043] Optionally, the floor 2, rear seat bracket 3, and mounting bracket 5 are welded together, thereby improving the connection strength between the rear seat bracket 3 and mounting bracket 5 and the floor 2. When the battery pack crossbeam 42 is connected to the floor 2, the connection strength of the battery pack crossbeam 42 can be improved, and the rigidity of the vehicle body structure can be improved. Furthermore, since the mounting bracket 5 is connected to the floor 2 and the rear seat bracket 3 as an integrated structure, the battery pack crossbeam 42 is also connected to the rear seat bracket 3 as an integrated structure, thereby improving the installation strength and rigidity of the rear seat bracket 3.

[0044] Optionally, referring to Figure 3, the multiple mounting brackets 5 include a first mounting bracket 51 and a second mounting bracket 52, which are located on both sides of the battery pack crossbeam 42 along the left-right direction Y of the vehicle. The vehicle body structure also includes a left seat belt reinforcement plate 61 and a right seat belt reinforcement plate 62, which are both located on the upper side of the floor 2 along the vertical direction Z of the vehicle. The left seat belt reinforcement plate 61 is opposite to the first mounting bracket 51, and the right seat belt reinforcement plate 62 is opposite to the second mounting bracket 52.

[0045] Along the left-right direction (Y) of the vehicle, the left seatbelt reinforcement plate 61 and the right seatbelt reinforcement plate 62 are installed on the left and right sides of the floor 2. Along the up-down direction (Z) of the vehicle, the left seatbelt reinforcement plate 61, the first mounting bracket 51, and the corresponding rear seat bracket 3 are positioned opposite each other, and the right seatbelt reinforcement plate 62, the second mounting bracket 52, and the corresponding rear seat bracket 3 are positioned opposite each other. This improves the connection strength between the battery pack crossbeam 42 and the floor 2, thereby improving the installation strength and rigidity of the rear seat bracket, and also improving the load-bearing rigidity and collision safety of the rear seat, the left seatbelt reinforcement plate 61, and the right seatbelt reinforcement plate 62. In addition, when the vehicle body is subjected to a side collision or pole collision, the tension exerted by the seatbelt on the left seatbelt reinforcement plate 61 or the right seatbelt reinforcement plate 62 can be transmitted to the battery pack crossbeam 42, improving the restraint of the seatbelt on the occupants and enhancing the collision protection performance.

[0046] In one specific embodiment, the floor 2, the first mounting bracket 51, the corresponding rear seat bracket 3, and the left seat belt reinforcement plate 61 are welded together, thereby improving the connection strength between the corresponding rear seat bracket 3, the first mounting bracket 51, and the left seat belt reinforcement plate 61 and the floor 2; the floor 2, the second mounting bracket 52, the corresponding rear seat bracket 3, and the right seat belt reinforcement plate 62 are welded together, thereby improving the connection strength between the corresponding rear seat bracket 3, the second mounting bracket 52, and the right seat belt reinforcement plate 62 and the floor 2. When the battery pack crossbeam 42 is connected to the floor 2, since the first mounting bracket 51, the second mounting bracket 52, and other mounting brackets 5, the left seat belt reinforcement plate 61, and the right seat belt reinforcement plate 62 are connected to the floor 2 and the rear seat bracket 3 as an integral structure, the battery pack crossbeam 42 and the rear seat bracket 3 are also connected as an integral structure, which can improve the connection strength of the battery pack crossbeam 42, thereby improving the installation strength and rigidity of the rear seat bracket 3.

[0047] For example, the left seat belt reinforcement plate 61 and the right seat belt reinforcement plate 62 are respectively connected to the corresponding sill beam 1 so that the sill beam 1, the left seat belt reinforcement plate 61, the right seat belt reinforcement plate 62, the floor 2 and the battery pack crossbeam 42 are connected as a whole, thereby improving the strength and rigidity of the vehicle body structure and improving the collision resistance performance of the vehicle body structure.

[0048] Both the left seat belt reinforcement plate 61 and the right seat belt reinforcement plate 62 are provided with through holes. The left seat belt reinforcement plate 61 and the right seat belt reinforcement plate 62 are respectively welded to the two sides of the floor 2 along the left and right direction of the vehicle. The corresponding rear seat brackets pass through the through holes on the left seat belt reinforcement plate 61 and the right seat belt reinforcement plate 62 respectively, thereby improving the strength and rigidity of the rear seat brackets.

[0049] Optionally, referring to Figure 3, the vehicle body structure also includes a mounting bracket 7, and both ends of the battery pack crossbeam 42 are fixed to the corresponding sill beam 1 via the mounting bracket 7.

[0050] The battery pack crossbeam 42 is fixed to the sill beam 1 by the mounting bracket 7, thereby connecting the battery pack crossbeam 42 and the sill beam 1 into an integrated structure, thereby improving the strength and rigidity of the vehicle body structure and enhancing the force transmission performance of the vehicle body structure in side collisions and pole collisions.

[0051] For example, both ends of the battery pack crossbeam 42 are connected and fixed to the corresponding sill beam 1 by two mounting brackets 7. The two mounting brackets 7 are connected and fixed to the sill beam 1 on the front and rear sides of the battery pack crossbeam 42, respectively.

[0052] Optionally, referring to Figures 1, 2 and 4, the vehicle body structure also includes a front crossbeam lower plate 8, which is located between the two sill beams 1 and connected to the floor 2; the battery pack 4 also includes a first beam 43 and a second beam 44, both of which are located on the underside of the floor 2. The first beam 43 is connected to the front crossbeam lower plate 8 and extends along the left-right direction Y of the vehicle and along the front-rear direction X of the vehicle. The first beam 43 and the battery pack crossbeam 42 are spaced apart, and the second beam 44 is connected between the first beam 43 and the battery pack crossbeam 42. The battery cell module is connected to the first beam 43 and the second beam 44.

[0053] Along the front-rear direction X of the vehicle, the lower plate 8 of the front bulkhead crossbeam, the front seat crossbeam, and the battery pack crossbeam 42 are arranged in sequence at intervals. The front seat crossbeam is located on the upper side of the floor 2, and the lower plate 8 of the front bulkhead crossbeam and the battery pack crossbeam 42 are located on the lower side of the floor 2.

[0054] The first beam 43, the second beam 44, and the battery pack crossbeam 42 are constructed in an "I" shape, serving as a support structure for the battery cell module. This structure provides a stable mounting base for the battery cell module. Connecting the first beam 43 to the lower plate 8 of the front crossbeam and connecting the battery pack crossbeam 42 to the sill beam 1 and the floor 2 can improve the installation stability of the battery pack, as well as enhance the strength and torsional stiffness of the vehicle body structure. This, in turn, improves the side impact and pole impact performance of the vehicle body structure, allowing it to disperse collision energy to other parts of the vehicle body when it is involved in a collision.

[0055] Optionally, a third mounting bracket is provided between the second beam 44 and the floor 2. Connecting the second beam 44 to the floor 2 via the third mounting bracket can improve the installation strength of the second beam 44. At the same time, since the battery pack crossbeam 42 is connected to the floor 2 via multiple mounting brackets 5, and the second beam 44 is connected to the floor 2 via the third mounting bracket, the connection strength between the battery pack 4 and the vehicle body is improved, thereby improving the strength mode and stiffness mode of the battery pack 4.

[0056] Optionally, referring to Figures 3 to 5, the vehicle body structure also includes a battery pack sealing beam 9. Along the left-right direction Y of the vehicle, the two ends of the battery pack sealing beam 9 are respectively connected to two sill beams 1. The battery pack sealing beam 9 is located on the rear side of the battery pack beam 42. The battery pack 4 also includes a lower battery pack housing 45. The lower battery pack housing 45 is sealed to the lower side of the two sill beams 1, the lower side of the front crossbeam lower plate 8, and the lower side of the battery pack sealing beam 9, so as to seal the cell module, the battery pack beam 42, the first beam 43, and the second beam 44 between the floor 2 and the lower battery pack housing 45.

[0057] The battery pack sealing beam 9 is located on the rear side of the battery pack beam 42 and is used for a sealed connection with the lower housing 45 of the battery pack. The position of the battery pack sealing beam 9 can be moved according to the size of the battery pack 4. When the battery pack 4 has a large capacity, the size of the cell module is large, and the battery pack sealing beam 9 can be moved away from the battery pack beam 42 to accommodate the cell module. When the battery pack has a small capacity, the size of the cell module is relatively small, and the battery pack sealing beam 9 can be moved closer to the battery pack beam 42 to accommodate the cell module. This meets the development needs of different power capacities and makes the vehicle body structure more flexible and compatible.

[0058] The floor 2 serves as the upper shell of the battery pack. The lower shell 45 of the battery pack is sealed to the lower sides of the two sill beams 1, the lower side of the front crossbeam lower plate 8, and the lower side of the battery pack sealing crossbeam 9. The lower shell 45 and the floor 2 form a receiving cavity, in which the cell module, the battery pack crossbeam 42, the first beam 43, and the second beam 44 are housed. Since the cell module is fixed on the battery pack crossbeam 42, the first beam 43, and the second beam 44, the crossbeam 42, the first beam 43, and the second beam 44 bear the weight of the cell module, thus relieving the lower shell 45 of stress. The lower shell 45 only serves as a seal and protection for the battery pack. The lower shell 45 can be made of a low-strength material to reduce costs and weight.

[0059] Optionally, the cell module includes a liquid cooling plate and a battery cell assembly. The liquid cooling plate is located on the side of the first beam 43, the second beam 44, and the battery pack crossbeam 42 away from the floor 2, and the battery cell assembly is located above the liquid cooling plate.

[0060] The liquid cooling plate functions to cool and dissipate heat from the battery cells. Connecting the liquid cooling plate to the I-shaped bracket formed by the first beam 43, the second beam 44, and the battery pack crossbeam 42 creates a support structure for the battery cells, simplifying the battery pack setup. Furthermore, the first beam 43, the second beam 44, and the battery pack crossbeam 42, together with the two sill beams 1, form a frame structure, enhancing the installation strength of the battery cells and thus improving their stability. In the event of a collision or impact, the external impact force is absorbed and transferred by the sill beams 1, the first beam 43, the second beam 44, and the battery pack crossbeam 42, thereby reducing damage to the battery cells and mitigating the risk of thermal runaway.

[0061] When installing the battery pack 4, the battery pack crossbeam 42, the first beam 43 and the second beam 44 are first installed on the vehicle body assembly to achieve a tight connection between the battery pack crossbeam 42, the first beam 43 and the second beam 44 and the vehicle body frame. This can improve the torsional rigidity of the vehicle body, improve pole impact and side impact performance, and improve collision safety performance. Then, the battery cell group and liquid cooling plate are installed. Finally, the lower housing 45 of the battery pack is installed on the lower side of the two sill beams 1, the lower side of the front crossbeam lower plate 8 and the lower side of the battery pack sealing crossbeam 9, so that the lower housing 45 of the battery pack is not subjected to force.

[0062] Optionally, referring to Figure 3, the two sill beams 1 include a first sill beam 11 and a second sill beam 12. The first sill beam 11 and the lower housing 45 of the battery pack enclose a first chamber 13 for accommodating an exhaust pipe. The second sill beam 12 and the lower housing 45 of the battery pack enclose a second chamber 14 for accommodating a drainage pipe. The upper wall of the first chamber 13 is located above the upper wall of the second chamber 14.

[0063] The upper wall of the first chamber 13 can be the lower side wall of the first sill beam 11 along the vertical direction Z of the vehicle, and the upper wall of the second chamber 14 can be the lower side wall of the second sill beam 12 along the vertical direction Z of the vehicle. The upper wall of the first chamber 13 is located above the upper wall of the second chamber 14. If the lower side wall of the first sill beam 11 along the vertical direction Z of the vehicle is moved upward by 30mm, it means that the dimension of the first chamber 13 along the vertical direction Z of the vehicle is larger than the dimension of the second chamber 14 along the vertical direction Z of the vehicle, thus allowing the first chamber 13 to accommodate the exhaust pipe. In other words, the two sill beams 1 adopt an asymmetrical design, thereby providing an exhaust pipe installation channel for plug-in hybrid or range-extended electric vehicles. For example, the lower side of the first chamber 13 is empty without other components, and the lower side of the second chamber 14 is empty without other components.

[0064] It should be noted that for pure electric vehicles, since an exhaust pipe is not required, the two sill beams 1 can be symmetrically arranged and interchanged. For pure electric vehicles, plug-in hybrid vehicles, or range-extended vehicles, only the first sill beam needs to be replaced to achieve structural compatibility.

[0065] Secondly, embodiments of this application provide a vehicle including the body structure described in any of the above embodiments. The vehicle in this application has the beneficial effects of the body structure described in any of the above embodiments.

[0066] The vehicle body structure described in this application can be applied to pure electric vehicles, plug-in hybrid vehicles, and range-extended electric vehicles. Furthermore, by moving the battery pack sealing beam 9, it can adapt to battery packs of different lengths and sizes, meeting the development needs for different power capacities. This results in a high degree of flexibility and compatibility for the vehicle body structure. Simultaneously, integrating the rear seat beam with the battery pack beam 42 achieves weight reduction and cost reduction.

[0067] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0070] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vehicle body structure, characterized in that, include: Two door sill beams (1) are provided at intervals along the left-right direction (Y) of the vehicle; Floor (2), connected to the two sill beams (1); rear seat bracket (3), located on the upper side of the floor (2); battery pack (4), including cell module and battery pack crossbeam (42), the battery pack crossbeam (42) is located on the lower side of the floor (2) and is opposite to the rear seat bracket (3), along the left-right direction (Y) of the vehicle, the two ends of the battery pack crossbeam (42) are respectively connected to the two sill beams (1), and the cell module is connected to the battery pack crossbeam (42).

2. The vehicle body structure according to claim 1, characterized in that, The battery pack crossbeam (42) is fixed to the floor (2) by a mounting bracket (5). Along the vertical direction (Z) of the vehicle, the mounting bracket (5) is positioned opposite to the rear seat bracket (3).

3. The vehicle body structure according to claim 2, characterized in that, There are multiple mounting brackets (5) arranged at intervals along the left-right direction (Y) of the vehicle; there are multiple rear seat brackets (3) arranged one-to-one with the mounting brackets (5) along the up-down direction (Z) of the vehicle.

4. The vehicle body structure according to claim 3, characterized in that, The plurality of mounting brackets (5) include a first mounting bracket (51) and a second mounting bracket (52), the first mounting bracket (51) and the second mounting bracket (52) being located on both sides of the battery pack crossbeam (42) along the left-right direction (Y) of the vehicle; the vehicle body structure also includes a left seat belt reinforcement plate (61) and a right seat belt reinforcement plate (62), the left seat belt reinforcement plate (61) and the right seat belt reinforcement plate (62) being located on the upper side of the floor (2) along the up-down direction (Z) of the vehicle, the left seat belt reinforcement plate (61) being opposite to the first mounting bracket (51), and the right seat belt reinforcement plate (62) being opposite to the second mounting bracket (52).

5. The vehicle body structure according to claim 2, characterized in that, The floor (2), the rear seat bracket (3), and the hanging point bracket (5) are welded together.

6. The vehicle body structure according to claim 1, characterized in that, It also includes a mounting bracket (7), and both ends of the battery pack beam (42) are fixed to the corresponding sill beam (1) by the mounting bracket (7).

7. The vehicle body structure according to claim 1, characterized in that, It also includes a front crossbeam lower plate (8), which is located between two door sill beams (1) and connected to the floor (2); the battery pack (4) also includes a first beam (43) and a second beam (44), the first beam (43) and the second beam (44) are both located on the lower side of the floor (2), the first beam (43) is connected to the front crossbeam lower plate (8) and extends along the left-right direction (Y) of the vehicle and along the front-rear direction (X) of the vehicle, the first beam (43) and the battery pack crossbeam (42) are spaced apart, the second beam (44) is connected between the first beam (43) and the battery pack crossbeam (42), and the cell module is connected to the first beam (43) and the second beam (44).

8. The vehicle body structure according to claim 7, characterized in that, It also includes a battery pack sealing beam (9) along the left-right direction (Y) of the vehicle. The two ends of the battery pack sealing beam (9) are respectively connected to the two sill beams (1). The battery pack sealing beam (9) is located on the rear side of the battery pack beam (42). The battery pack (4) also includes a battery pack lower housing (45). The battery pack lower housing (45) is sealed to the lower side of the two sill beams (1), the lower side of the front crossbeam lower plate (8), and the lower side of the battery pack sealing beam (9) to seal the cell module, the battery pack beam (42), the first beam (43), and the second beam (44) between the floor (2) and the battery pack lower housing (45).

9. The vehicle body structure according to claim 7, characterized in that, The cell module includes a liquid cooling plate and a battery cell assembly. The liquid cooling plate is located on the side of the first beam (43), the second beam (44) and the battery pack crossbeam (42) away from the floor (2). The battery cell assembly is located above the liquid cooling plate.

10. The vehicle body structure according to claim 8, characterized in that, The two threshold beams (1) include a first threshold beam (11) and a second threshold beam (12). The first threshold beam (11) and the lower housing (45) of the battery pack enclose a first chamber (13) for accommodating an exhaust pipe. The second threshold beam (12) and the lower housing (45) of the battery pack enclose a second chamber (14) for accommodating a drainage pipe. The upper wall of the first chamber (13) is located above the upper wall of the second chamber (14).

11. A vehicle, characterized in that, The vehicle body structure includes any one of claims 1-10.

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