Battery pack and vehicle body sealing structure, vehicle body and vehicle

Abstract

Provided in the embodiments of the present application are a battery pack and vehicle body sealing structure, a vehicle body and a vehicle. The battery pack and vehicle body sealing structure comprises: a floor panel; a lower cross member arranged below the floor panel; and a sealing plate adapted to seal the lower cross member and a top cover of a battery pack, wherein the sealing plate comprises a first connecting portion and a second connecting portion arranged opposite each other, and both the first connecting portion and the second connecting portion are fixedly connected to the lower cross member.

Description

Battery pack and vehicle body sealing structure, vehicle body and vehicle

[0001] The present application claims priority to the Chinese patent application No. 2024113691675, filed on September 27, 2024, and entitled "Battery pack and vehicle body sealing structure, vehicle body and vehicle", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to a battery pack and vehicle body sealing structure, a vehicle body and a vehicle. BACKGROUND

[0003] With the continuous development of the automobile industry, the design of the vehicle body structure is required to be lightweight and cost-reducing. Setting the battery pack top cover as a component of the vehicle floor can reduce the number of independent components and save the cost of the vehicle. In order to avoid external water vapor entering the vehicle interior through the gap between the battery pack and the vehicle floor, a sealing structure needs to be provided between the battery pack and the vehicle body.

[0004] The battery pack and vehicle body sealing structure disclosed in the related art is relatively complex, which increases the manufacturing cost and weight of the vehicle, and cannot meet the requirements of lightweight and cost reduction of the vehicle. SUMMARY

[0005] The present application aims to provide a battery pack and vehicle body sealing structure, a vehicle body and a vehicle to solve the problem of complex battery pack and vehicle body sealing structure in the related art, which increases the manufacturing cost and weight of the vehicle.

[0006] To solve the above technical problems, the present application is implemented as follows:

[0007] In a first aspect, the present application discloses a battery pack and vehicle body sealing structure, comprising:

[0008] a floor;

[0009] a lower cross beam arranged below the floor;

[0010] a sealing plate adapted to seal the lower cross beam and a battery pack top cover, the sealing plate comprising a first connecting portion and a second connecting portion arranged oppositely, and the first connecting portion and the second connecting portion are both fixedly connected with the lower cross beam.

[0011] Optionally, the floor is formed with a hollow portion, and the battery pack top cover is adapted to be arranged in the hollow portion to form at least part of the floor.

[0012] Optionally, the sealing plate is arranged in a ring shape between the battery pack top cover and the vehicle body.

[0013] Optionally, at least part of the sealing plate is bent upwards along the thickness direction of the lower cross beam to form the first connecting part, and the first connecting part is connected to the side wall of the lower cross beam.

[0014] Optionally, the second connecting part is connected to the bottom wall of the lower cross beam.

[0015] Optionally, a sealing member is arranged between the sealing plate and the battery pack top cover.

[0016] Optionally, a protruding part is arranged on the second connecting part, the protruding part protrudes from the second connecting part towards the sealing member, and the protruding part is used for mounting the sealing member.

[0017] Optionally, the protruding part has a first preset length along the width direction of the lower cross beam, and the first preset length is greater than or equal to 30 mm.

[0018] Optionally, the battery pack is connected to the lower cross beam through a mounting bracket.

[0019] Optionally, the mounting bracket is connected to the side wall of the lower cross beam, and a mounting point is arranged on the side cover of the battery pack, and the mounting point is fixedly connected to the mounting bracket through a fixing member.

[0020] In a second aspect, the application further discloses a vehicle body, which comprises the battery pack and vehicle body sealing structure according to any one of the above.

[0021] Optionally, the floor comprises a first floor, a second floor and a third floor connected in sequence, and the lower cross beam is arranged on the lower side of the first floor.

[0022] Optionally, second sealing plates are arranged on both sides of the second floor respectively, and the second sealing plates are arranged separately from the second floor.

[0023] Optionally, the vehicle body further comprises a rear anti-collision beam assembly and a rear wall panel.

[0024] The rear wall panel is connected to the floor, and the rear anti-collision beam assembly is connected to the rear wall panel.

[0025] Optionally, the rear anti-collision beam assembly comprises a first connecting plate and an anti-collision beam assembly.

[0026] The first connecting plate is connected to the rear wall panel, and the anti-collision beam assembly is connected to the first connecting plate.

[0027] The first connecting plate and the rear wall panel have a gap with a second preset length.

[0028] Optionally, the second preset length is 3-5 mm.

[0029] Optionally, the anti-collision beam assembly comprises an energy absorption box, a second connecting plate and an anti-collision beam.

[0030] One side of the energy absorption box is connected to the first connecting plate, and the other side is connected to the second connecting plate, and the second connecting plate is connected to the anti-collision beam.

[0031] Optionally, the first connecting plate and the rear wall are connected by a plurality of bolts.

[0032] Optionally, the bolts on the side of the rear wall in the height direction are also used to install rear hangers.

[0033] In a third aspect, the application also discloses a vehicle comprising the vehicle body of any one of the above.

[0034] In the embodiment of the application, the sealing plate comprises the oppositely arranged first connecting part and the second connecting part. By directly connecting the oppositely arranged first connecting part and the second connecting part on the lower cross beam to seal the lower cross beam and the battery pack top cover, the sealing plate does not need to be installed by forming a lap plane with the lower cross beam through an additional mounting plate, so that the battery pack and the vehicle body sealing structure are simpler, thereby reducing the manufacturing cost and weight of the vehicle body, and meeting the demand for automobile lightweighting and cost reduction.

[0035] Additional aspects and advantages of the application will be set forth in part in the following description, will become apparent from the following description, or will be learned by practice of the application.

[0036] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the application or related technologies, the following will briefly introduce the drawings needed to be used in the embodiment or related technology description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0038] Fig. 1 is a structural schematic diagram of a battery pack and vehicle body sealing structure according to an embodiment of the application;

[0039] Fig. 2 is a schematic diagram of the A-A direction cross section of the battery pack and vehicle body sealing structure shown in Fig. 1;

[0040] Fig. 3 is a schematic diagram of the B-B direction cross section of the battery pack and vehicle body sealing structure shown in Fig. 1;

[0041] Fig. 4 is a partial structural schematic diagram of a battery pack according to an embodiment of the present application;

[0042] Fig. 5 is a structural schematic diagram of a vehicle body according to an embodiment of the present application;

[0043] Fig. 6 is a C-C direction cross-sectional schematic diagram of the vehicle body shown in Fig. 5;

[0044] Fig. 7 is a structural exploded schematic diagram of a vehicle body according to an embodiment of the present application;

[0045] Fig. 8 is a partial enlarged schematic diagram of a vehicle body according to an embodiment of the present application;

[0046] Fig. 9 is a partial enlarged schematic diagram of a vehicle body according to an embodiment of the present application;

[0047] Fig. 10 is a partial enlarged schematic diagram of a vehicle body according to an embodiment of the present application;

[0048] Fig. 11 is a structural schematic diagram of a crash beam according to an embodiment of the present application;

[0049] Fig. 12 is a structural schematic diagram of a vehicle according to an embodiment of the present application.

[0050] Reference signs: 1, floor; 111, first floor; 112, first sealing plate; 113, second floor; 114, second sealing plate; 115, third floor; 116, third sealing plate; 117, hollow part; 2, lower cross beam; 3, sealing plate; 31, first connecting part; 32, second connecting part; 33, protruding part; 4, battery pack; 41, mounting point; 42, three-phase wire joint; 5, sealing member; 6, mounting bracket, 60, screw; 61, nut; 7, longitudinal beam; 8, rear wall; 9, rear crash beam assembly; 90, first connecting plate; 91, crash beam assembly; 911, energy absorption box; 912, second connecting plate; 913, crash beam; 92, bolt; 10, rocker beam; 100, vehicle body; 200, vehicle; first direction X, second direction Y, third direction Z. Specific embodiments

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0052] The terms "first", "second", and the like, in the description and in the claims of the present application and above drawings, are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. The terms "comprises", "comprising", "includes", "including" and the like, are synonymous with the term "containing" and are used in the sense of "including, but not limited to". For example, a process, method, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements, but can include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Other definitions will be apparent to one of skill in the art in view of the description and claims.

[0053] Reference to "an embodiment" or "the embodiment" in this disclosure means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is expressly understood that any of the embodiments described can be incorporated into one or more embodiments of the application, and all of these embodiments can be claimed in the claims.

[0054] In a first aspect, the embodiments of the present application provide a battery pack and vehicle body sealing structure, applied to a vehicle 200.

[0055] Referring to FIGS. 1-4, in particular, the battery pack and vehicle body sealing structure includes a floor 1, a lower cross beam 2 arranged below the floor 1, a sealing plate 3 adapted to seal the lower cross beam 2 and a battery pack 4 top cover, the sealing plate 3 includes oppositely arranged first and second connecting portions 31 and 32, and the first and second connecting portions 31 and 32 are fixedly connected with the lower cross beam 2.

[0056] Specifically, the length direction of the lower cross beam 2 is the Y direction in the figure, which is the length direction Y of the automobile, the thickness direction of the lower cross beam 2 is the Z direction in the figure, which is the height direction Z of the automobile, and the width direction of the lower cross beam 2 is the X direction in the figure, which is the width direction X of the automobile. For ease of description, the X direction will be referred to as the first direction X, the Y direction will be referred to as the second direction Y, and the Z direction will be referred to as the third direction Z in the following description.

[0057] The floor 1 is used to provide structural support for the upper components of the vehicle body 100, the lower cross beam 2 is connected below the floor 1 along the first direction X and extends below the lower cross beam 2 along the second direction Y, and the lower cross beam 2 is a rigid structural member that can provide rigid support in the second direction Y for the floor 1.

[0058] The sealing plate 3 is arranged between the battery pack 4 top cover and the lower cross beam 2, and the sealing plate 3 can seal the battery pack 4 top cover and the lower cross beam 2 to prevent external moisture and other impurities from entering the interior of the vehicle 200 through the gap between the lower cross beam 2 and the battery pack 4 top cover.

[0059] In the related art, when the sealing plate 3 is installed on the lower cross beam 2, an additional mounting plate is provided, one side of the mounting plate is welded to the side surface of the lower cross beam 2, and the other side forms a lap plane parallel to the first direction X together with the bottom surface of the lower cross beam 2, one end of the sealing plate 3 is connected to the mounting plate on the lap plane, and the other end is connected to the lower cross beam 2, thereby realizing that the sealing plate 3 can be arranged between the lower cross beam 2 and the top cover of the battery pack 4. In the embodiment of the application, since the sealing plate 3 includes the oppositely arranged first connecting portion 31 and the second connecting portion 32. By directly connecting the oppositely arranged first connecting portion 31 and the second connecting portion 32 to the lower cross beam 2, the lower cross beam 2 and the top cover of the battery pack 4 are sealed, without the need for an additional mounting plate to form a lap plane together with the lower cross beam 2 to install the sealing plate 3, so that the battery pack and the vehicle body sealing structure is simpler, thereby reducing the manufacturing cost and weight of the vehicle body 100, meeting the needs of automobile lightweighting and cost reduction.

[0060] As shown in FIGS. 1, 5 and 7, optionally, the floor 1 is formed with a hollow portion 117, and the top cover of the battery pack 4 is adapted to be arranged in the hollow portion 117 to form at least part of the floor 1.

[0061] Specifically, the floor 1 is provided with a hollow portion 117 at the mounting position of the battery pack 4, and the specific shape of the hollow portion 117 is adapted to the shape of the battery pack 4. The top cover of the battery pack 4 is arranged in the hollow portion 117, so that the top cover of the battery pack 4 can be part of the floor 1. In actual application, by taking the top cover of the battery pack 4 as part of the floor 1, the number of independent floor 1 components in the vehicle body 100 structure is reduced, which helps to reduce the overall weight of the vehicle 200 and save the cost of the automobile.

[0062] Optionally, the sealing plate 3 is arranged in a ring shape between the top cover of the battery pack 4 and the vehicle body 100, that is, the sealing plate 3 is arranged above the top cover of the battery pack 4.

[0063] Specifically, as shown in FIG. 1, FIG. 5 and FIG. 7, the floor 1 is connected with the rocker beam 10 on both sides, the rocker beam 10 and the lower cross beam 2 are arranged in a ring shape above the top cover of the battery pack 4, and the sealing plate 3 is arranged in a ring shape below the rocker beam 10 and the lower cross beam 2. The floor 1 and the rocker beam 10 on both sides of the floor 1 are arranged in a ring shape to form a hollow part 117, the battery pack 4 is located in the hollow part 117, the top cover of the battery pack 4 is in contact with the ground of the rocker beam 10 and the lower cross beam 2, thereby the top cover of the battery pack 4 can be used as part of the floor 1. Since the battery pack 4 has a certain size and shape, when the top cover of the battery pack 4 forms part of the floor 1, external moisture can enter the interior of the vehicle 200 from the gaps between the rocker beam 10 and the lower cross beam 2. In actual application, the sealing plate 3 is arranged in a ring shape below the rocker beam 10 and the lower cross beam 2, thereby the external moisture can be prevented from entering the interior of the vehicle 200 through the gaps between the top cover of the battery pack 4 and the rocker beam 10 and the lower cross beam 2, and the sealing effect between the battery pack 4 and the vehicle body 100 is improved.

[0064] The ring shape matches the shape of the battery pack 4, which can be rectangular, circular, etc., and the present application does not make specific limitations thereto.

[0065] Optionally, at least part of the sealing plate 3 is bent upward along the thickness direction of the lower cross beam 2 to form the first connecting part 31, and the first connecting part 31 is connected to the side wall of the lower cross beam 2.

[0066] Referring to FIG. 2, the lower cross beam 2 has a quadrilateral structure with a bottom wall along the first direction X and side walls along the third direction Z, and the sealing plate 3 is a metal plate. Part of the sealing plate 3 is bent upward to form the first connecting part 31, and the first connecting part 31 is welded to the side wall. In the present application, by directly bending part of the sealing plate 3 to form the first connecting part 31, the first connecting part 31 can be directly fixed to the side wall of the lower cross beam 2 through the bending process, thereby reducing the use of additional fixing parts, reducing the overall structure weight, and reducing the manufacturing cost. By connecting the first connecting part 31 to the side wall, the tightness of the sealing of the lower cross beam 2 on the side wall is ensured, and the external environment water vapor and the like entering the interior of the vehicle 200 through the lower cross beam 2 is effectively blocked.

[0067] Further, the second connecting part 32 is connected to the bottom wall of the lower cross beam 2.

[0068] Specifically, the lower cross beam 2 has a quadrilateral structure with a bottom wall along the first direction X and side walls along the third direction Z. The part of the sealing plate 3 that is not bent forms the second connecting part 32, and the second connecting part 32 is welded to the bottom wall. The first connecting part 31 and the second connecting part 32 are arranged at a certain angle relative to each other.

[0069] In practical applications, by connecting the second connecting part 32 to the bottom surface of the lower cross beam 2, the gap between the lower cross beam 2 and the top cover of the battery pack 4 can be sealed, so as to prevent external water vapor and the like from entering the interior of the vehicle body 100 through the gap between the lower cross beam 2 and the top cover of the battery pack 4. By forming the second connecting part 32 on the unbent part of the sealing plate 3, the use of additional fixing parts is reduced, thereby reducing the overall structural weight and manufacturing cost.

[0070] Further, in order to ensure the welding quality of the sealing plate 3, the first connecting part 31 and the second connecting part 32 on the sealing plate 3 need to reserve at least 15 mm of welding edge.

[0071] Further, the surface of the lower cross beam 2 not connected by the sealing plate 3 is coated with sealant.

[0072] Specifically, by coating the sealant on the surface of the lower cross beam 2 not directly contacting the sealing plate 3, the sealing performance of the lower cross beam 2 and the floor 1 is enhanced, the possible small gap at the connection of the sealing plate 3 is compensated, the integrity of the entire sealing system is ensured, and the intrusion of moisture, dust and other external environmental factors into the internal structure of the vehicle 200 is effectively blocked.

[0073] Further, the position where the sealing plate 3 is welded to the lower cross beam 2 needs to reserve a length of 3-5 mm, so as to ensure that the sealant has a length of 3-5 mm, so as to facilitate the coating of the sealant at the position where the sealing plate 3 is welded to the lower cross beam 2, improve the sealing performance at the position where the sealing plate 3 is welded to the lower cross beam 2, and effectively block the intrusion of moisture, dust and other external environmental factors into the internal structure of the vehicle 200.

[0074] Optionally, a sealing part 5 is arranged between the sealing plate 3 and the top cover of the battery pack 4.

[0075] Specifically, the surface of the top cover of the battery pack 4 and the sealing plate 3 is uneven, so that there is a gap between the top cover of the battery pack 4 and the sealing plate 3. In the gap, by arranging the sealing part 5, the sealing part 5 is sealing foam, on the one hand, the sealing part 5 can prevent external gas from entering the interior of the vehicle 200 through the gap between the sealing plate 3 and the top cover of the battery pack 4, on the other hand, the sealing foam has elasticity, and the sealing foam is compressed to a predetermined state after installation, and the elastic deformation of the material is used to fill all uneven surfaces, thereby further improving the sealing effect between the battery pack 4 and the vehicle body 100. In addition, the sealing foam also absorbs the vibration and impact from the road, protects the battery pack 4 from mechanical damage, reduces the transmission of noise and vibration into the vehicle 200, and improves the riding comfort.

[0076] Optionally, the second connecting part 32 is provided with a protruding part 33, the protruding part 33 protrudes from the second connecting part 32 towards the sealing part 5, and the protruding part 33 is used for mounting the sealing part 5 to contact the sealing part 5.

[0077] Specifically, the bottom surface of the lower cross beam 2 generally has a local protruding or recessed structure, and directly welding the second connecting part 32 on the bottom surface will make the contact surface between the second connecting part 32 and the sealing foam uneven, thereby reducing the sealing effect of the sealing foam. By providing the protruding part 33 on the second connecting part 32, the protruding part 33 has a platform structure, so that the contact surface between the sealing foam and the lower cross beam 2 is more flat, ensuring the sealing effect of the sealing foam. In addition, the protruding part 33 has a certain preset length, which increases the contact area and compression force of the sealing foam, ensuring that even if the vehicle 200 encounters bumps or vibrations during driving, the sealing foam can still maintain stable contact with the protruding part 33, effectively blocking external pollutants such as water and dust from entering the battery pack 4 area, and improving the stability and reliability of the sealing system.

[0078] It should be noted that the bottom surface between the protruding part 33 and the lower cross beam 2 is a cavity. Although the sealing foam is shown as extending inside the cavity in Figures 3 and 4, in actual application, the space is usually not filled with sealing foam. The cavity is used to accommodate the protrusion of the bottom wall of the lower cross beam or other structures, so that the contact surface between the sealing foam and the lower cross beam 2 is more flat. Figures 3 and 4 show the state that the sealing foam is not compressed between the protruding part 33 and the lower cross beam 2. In essence, the sealing foam is located between the top cover of the battery pack 4 and the protruding part 33.

[0079] Optionally, the protruding part 33 has a first preset length in the width direction of the lower cross beam 2, and the first preset length a is greater than or equal to 30 mm.

[0080] Specifically, if the first preset length a is too short, the contact area between the sealing foam and the sealing plate 3 will be reduced, which will reduce the sealing effect of the sealing foam. In this embodiment, by setting the first preset length a to be greater than or equal to 30 mm, the contact area between the sealing foam and the sealing plate 3 can be increased while ensuring the reliability of the connection between the sealing plate 3 and the lower cross beam 2, thereby ensuring the sealing effect of the sealing foam.

[0081] Further, if the first preset length a is too long, the protruding part 33 will occupy too much space of the second connecting part 32, which will reduce the welding length of the sealing plate 3 and the lower cross beam 2, and reduce the reliability of the connection between the sealing plate 3 and the lower cross beam 2. The first preset length a can be between 30 mm and 40 mm. The range of the first preset length a can also be set according to actual conditions.

[0082] Optionally, a mounting bracket 6 is further included, and the battery pack 4 is connected to the lower cross beam 2 through the mounting bracket 6. Further, the mounting bracket 6 is connected to the side wall of the lower cross beam 2, and a mounting point 41 is arranged on the side cover of the battery pack 4, and the mounting point 41 is fixedly connected to the mounting bracket 6 through a fixing member.

[0083] Specifically, a plurality of mounting points 41 are arranged on the side cover of the battery pack 4 close to one side of the lower cross beam 2, the mounting bracket 6 is welded on the lower cross beam 2, and the mounting point 41 and the mounting bracket 6 are fixedly connected through the fixing member, so that the mounting point 41 on the battery pack 4 can be fixedly connected to the lower cross beam 2, one mounting bracket 6 is arranged at the position of one mounting point 41, and the side cover of the battery pack 4 close to one side of the lower cross beam 2 can be fixedly connected to the lower cross beam 2. In the embodiment of the present application, by arranging the mounting bracket 6, different models of battery packs 4 can be adapted, and a proper number of mounting brackets 6 can be selected according to the model of the battery pack 4, so that the practicability of the battery pack and the vehicle body sealing structure can be improved.

[0084] Further, the fixing member can include a screw 60 and a nut 61, and the screw 60 passes through the mounting point 41 and the mounting bracket 6 and is connected to the nut 61.

[0085] Further, the side close to one side of the lower cross beam 2 of the battery pack 4 is provided with a three-phase line joint 42, and the three-phase line joint 42 is used to be connected to other power devices on the vehicle 200.

[0086] Further, a nut plate (not shown in the figure) can be welded in the mounting bracket 6 to improve the strength and rigidity of the mounting bracket 6, and thus the strength and rigidity of the mounting point 41 of the battery pack 4 are improved, so that the battery pack 4 can be more stably and rigidly connected to the vehicle body 100.

[0087] In summary, the battery pack and the vehicle body sealing structure of the embodiment of the present application can at least have the following advantages:

[0088] In the embodiment of the present application, the sealing plate 3 includes the oppositely arranged first connecting part 31 and the second connecting part 32. By directly connecting the oppositely arranged first connecting part 31 and the second connecting part 32 to the lower cross beam 2 to seal the lower cross beam 2 and the top cover of the battery pack 4, the sealing plate 3 does not need to be installed by forming a lap plane with the lower cross beam 2, so that the battery pack and the vehicle body sealing structure are simpler, and thus the manufacturing cost and weight of the vehicle body 100 are reduced, and the demand for automobile lightweight and cost reduction is met.

[0089] In a second aspect, the embodiment of the present application further provides a vehicle body 100, and referring to FIGS. 5 to 11, the vehicle body 100 includes the battery pack and the vehicle body sealing structure according to any one of the above.

[0090] It should be noted that the structure of the battery pack and the vehicle body sealing structure in the embodiments of the present application is the same as that of the battery pack and the vehicle body sealing structure in any of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0091] Optionally, the floor 1 comprises a first floor 111, a second floor 113 and a third floor 115 connected in sequence; the lower cross beam 2 is arranged on the lower side of the first floor 111.

[0092] Specifically, the first floor 111, the second floor 113 and the third floor 115 are sequentially welded along the first direction X, the first floor 111 can be used to form a passenger compartment, the second floor 113 can be used to form a luggage compartment, and the third floor 115 can be used to form a tool compartment or a tire compartment.

[0093] Two longitudinal beams 7 are arranged on both sides of the first floor 111, the second floor 113 and the third floor 115 along the second direction Y and below the first floor 111, the second floor 113 and the third floor 115, and the two longitudinal beams 7 are used to provide longitudinal rigid support for the first floor 111, the second floor 113 and the third floor 115.

[0094] It should be noted that the specific shape and structure of the longitudinal beam 7, the first floor 111, the second floor 113 and the third floor 115 can be set according to actual conditions, and the embodiments of the present application do not make specific limitations.

[0095] Further, the first floor 111 is respectively connected with a first sealing plate 112 on both sides along the second direction Y, the first sealing plate 112 can be connected to the first floor 111 and the longitudinal beam 7, and the third floor 115 is respectively connected with a third sealing plate 116 on both sides along the second direction Y, the third sealing plate 116 can be connected to the third floor 115 and the longitudinal beam 7.

[0096] Further, the second floor 113 is respectively connected with a second sealing plate 114 on both sides, and the second floor 113 and the second sealing plate 114 are separately arranged.

[0097] Specifically, the second sealing plate 114 is two, the second sealing plate 114 is arranged on both sides of the second floor 113 along the second direction Y, and the second floor 113 and the second sealing plate 114 are separately arranged, and the second sealing plate 114 can be connected to the longitudinal beam 7 and the second connecting plate 912.

[0098] In the related art, in order to ensure the space of the vehicle 200 in the third direction Z, the cross-sectional size of the longitudinal beam 7 is generally reduced, and in the case of the reduced cross-sectional size of the longitudinal beam 7, the rear section of the longitudinal beam 7 is covered by the panel of the second floor 113, and the crash safety cannot be ensured. In the embodiment, the second sealing plate 114 is arranged on both sides of the second floor 113, so as to increase the torsional stiffness and bending stiffness of the second floor 113, improve the overall structural strength and safety of the floor, and further improve the crash safety of the floor.

[0099] Further, the first sealing plate 112, the second sealing plate 114 and the third sealing plate 116 have the same grade and thickness. Since the second floor 113 is difficult to form, a steel plate with thin thickness and good drawability is generally used, and the local abnormal noise problem of the rear floor is prone to occur, and the crash safety problem caused by the too small cross section cannot be ensured. Generally, the first sealing plate 112, the second sealing plate 114 and the third sealing plate 116 and the first floor 111, the second floor 113 and the third floor 115 are steel plates, but the grade of the first floor 111, the second floor 113 and the third floor 115 is different from that of the first sealing plate 112, the second sealing plate 114 and the third sealing plate 116. For example, the grade of the first floor 111, the second floor 113 and the third floor 115 can be DC51, and the thickness thereof is generally 0.6mm-0.65mm. The grade of the first sealing plate 112, the second sealing plate 114 and the third sealing plate 116 can be 340, 590, 420, 780 and the like. The thickness thereof is generally about 1.2mm. In the embodiment, the second sealing plate 114 with the same grade and thickness as the first sealing plate 112 and the second sealing plate 114 is arranged on both sides of the second floor 113, so as to further increase the torsional stiffness and bending stiffness of the second floor 113, improve the overall structural strength and safety of the floor. And the sealing plates are arranged on both sides of the first floor 111, the second floor 113 and the third floor 115, so as to form a rectangular frame structure for the safety protection of the battery pack 4 and the power distribution system, and meet the high-voltage safety requirement under high-speed collision.

[0100] The specific shape and structure of the first sealing plate 112, the second sealing plate 114 and the third sealing plate 116 can be set according to the actual situation, and the embodiment of the application does not make specific limitation.

[0101] In the related art, in order to ensure the space of the vehicle 200 in the third direction Z, the cross-sectional size of the longitudinal beam 7 is generally reduced. In the case of reducing the cross-sectional size of the longitudinal beam 7, the rear section of the longitudinal beam 7 is covered by the panel of the second floor 113, which cannot guarantee the crash safety, and because the second floor 113 is difficult to form, a steel plate with a relatively thin thickness and good drawability is generally used, which is prone to cause local abnormal noise of the rear floor, and also cannot guarantee the crash safety problem caused by the too small cross section. In the embodiment, by arranging the second sealing plate 114 with the same grade and material number as the first sealing plate 112 and the second sealing plate 114 on both sides of the second floor 113, the torsional stiffness and bending stiffness of the second floor 113 can be increased, and the overall structural strength and safety of the floor can be improved. And by arranging the sealing plates on both sides of the first floor 111, the second floor 113 and the third floor 115, the parts can be connected two by two to form a rectangular frame structure for the battery pack 4 to constitute a safety protection for the power distribution system, which can meet the high-voltage safety requirements under high-speed collision.

[0102] Optionally, the vehicle body 100 further comprises a rear anti-collision beam assembly 9 and a rear wall 8; the rear wall 8 is connected to the floor 1, and the rear anti-collision beam assembly 9 is connected to the rear wall 8.

[0103] Specifically, the rear wall 8 is connected to the floor 1, and the rear wall 8 is used to provide a mounting position for the rear anti-collision beam assembly 9, a tail lamp, a license plate bracket and other rear accessories, and is a basic structure for fixing and positioning these components. The rear anti-collision beam assembly 9 is connected to the rear wall 8. In the embodiment of the application, by arranging the rear anti-collision beam assembly 9 in the rear floor assembly, when the vehicle 200 is subjected to a rear impact, most of the impact energy can be absorbed and dispersed, and the strength of the impact force directly transmitted to the passenger compartment is reduced, thereby protecting the safety of the passengers in the vehicle. By absorbing the impact energy, the rear anti-collision beam 913 helps to reduce the damage to the rear structure of the vehicle 200 and reduce the maintenance cost.

[0104] Optionally, the rear anti-collision beam assembly 9 comprises a first connecting plate 90 and an anti-collision beam assembly 91; the first connecting plate 90 is connected to the rear wall 8, and the anti-collision beam assembly 91 is connected to the first connecting plate 90; the first connecting plate 90 and the rear wall 8 have a gap with a second predetermined length.

[0105] In the related art, the first connecting plate 90, the rear wall 8 and the bumper beam assembly 91 are usually arranged in close contact. The close contact arrangement can make the mounting point 41 of the first connecting plate 90, the rear wall 8 and the bumper beam assembly 91 have better connection strength. However, when electrophoresis is performed, the electrophoresis liquid cannot pass between the first connecting plate 90 and the rear wall 8 to form a complete corrosion-resistant structure. In the mounting surface of the first connecting plate 90 and the rear wall 8, water ingress and rusting due to poor electrophoresis can easily occur. In the present embodiment, by arranging a gap with a predetermined length between the first connecting plate 90 and the rear wall 8, the electrophoresis liquid can quickly pass through the gap during electrophoresis, forming a good coating structure and avoiding the problem of water ingress and rusting due to poor electrophoresis in the mounting surface of the bumper beam assembly 91.

[0106] Optionally, the second predetermined length is 3-5 mm.

[0107] Specifically, the first mounting plate is provided with a boss structure, which makes the rear wall 8 and the first connecting plate 90 have a gap with a second predetermined length. However, due to the limited structure of the first connecting plate 90, if the second predetermined length is too long, the first connecting plate 90 cannot be processed, and if the second predetermined length is too short, the electrophoresis liquid cannot pass through the gap well. In the present embodiment, by setting the second predetermined length to 3-5 mm, the problem of water ingress and rusting due to poor electrophoresis in the mounting surface of the bumper beam assembly 91 can be avoided, and the first connecting plate 90 can be easily processed to form the boss structure.

[0108] Optionally, the bumper beam assembly 91 comprises an energy-absorbing box 911, a second connecting plate 912 and a bumper beam 913; one side of the energy-absorbing box 911 is connected to the first connecting plate 90, and the other side is connected to the second connecting plate 912; the second connecting plate 912 is connected to the bumper beam 913.

[0109] Specifically, the energy-absorbing box 911 is connected to the first connecting plate 90 and the second connecting plate by two-way welding, and the bumper beam 913 is connected to the second connecting plate 912 by two-way welding. In actual application, when the vehicle 200 collides, the bumper beam 913 first contacts and resists the impact force, and its solid structure begins to absorb part of the energy. Subsequently, the energy-absorbing box 911 connected behind the bumper beam 913 then plays a role, further absorbing the remaining impact energy through its controllable deformation to reduce the energy transmitted to the passenger compartment, protecting the passengers from serious injury. Through the collapse of the energy-absorbing box 911, damage to important structural components of the vehicle 200 can be effectively avoided or reduced, reducing maintenance costs and improving the repairability of the vehicle 200.

[0110] Optionally, the first connecting plate 90 and the rear wall 8 are connected by a plurality of bolts 92.

[0111] Specifically, the first connecting plate 90 and the rear wall 8 are spaced apart in the third direction Z and are provided with a plurality of groups of bolt holes, each group of bolt holes includes two bolt holes symmetrically arranged on the two sides of the first connecting plate 90 and the rear wall 8, and a plurality of bolts 92 are sequentially arranged through the bolt holes on the first connecting plate 90 and the rear wall 8, so that the first connecting plate 90 can be fixedly connected to the rear wall 8. Since the bolt 92 connection is a relatively convenient and stable connection mode, the convenience and reliability of the first connecting plate 90 and the rear wall 8 can be improved.

[0112] Optionally, the bolt 92 on the upper side in the height direction of the rear wall 8 is also used to install a rear hook.

[0113] Specifically, the first connecting plate 90 and the rear wall 8 are spaced apart in the third direction Z and are provided with a plurality of groups of bolt holes, when the bolt 92 is installed in the bolt hole on the upper side in the third direction Z, the bolt 92 can be extended from the inside of the rear wall 8 to the outside of the rear wall 8, and the bolt 92 can be used to install a rear hook. Due to the demand for export overseas vehicles, there are usually regulatory requirements for rear hooks, and if the rear hook installation structure is not set in advance, additional installation will increase the cost of the vehicle. In the embodiment of the application, the bolt 92 on the upper side in the height direction of the rear wall 8 is used to install a rear hook, which can avoid the increase in cost caused by additional installation and reduce the manufacturing cost of the vehicle.

[0114] It should be noted that in addition to the components described in the above embodiments, other components can also be provided on the vehicle body 100 as shown in FIGS. 5 and 7. The embodiments of the application do not make specific provisions for other components provided on the vehicle body 100, and the actual situation can be selected as needed.

[0115] In a third aspect, as shown in FIG. 12, the embodiments of the application also provide a vehicle 200, which can specifically include the vehicle body 100 described in any of the above embodiments.

[0116] It should be noted that in the embodiments of the application, the structure of the vehicle body 100 is the same as that of the vehicle body 100 in any of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0117] As used herein, "one embodiment," "an embodiment," or "one or more embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Moreover, the appearances of the phrase "in one embodiment” in various places in this specification are not necessarily all referring to the same embodiment.

[0118] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been described in detail in order not to obscure the understanding of this description.

[0119] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements.

[0120] It should finally be noted that the above-mentioned examples are merely intended to illustrate the technical solutions of the present application, but not to limit the technical solutions of the present application; even though the technical solutions of the present application have been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to some technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack and vehicle body sealing structure, wherein, The battery pack and vehicle body sealing structure comprises: a floor (1); a lower cross beam (2) arranged below the floor (1); a sealing plate (3) adapted to seal the lower cross beam (2) and the top cover of the battery pack (4), the sealing plate (3) comprising oppositely arranged first and second connecting portions (31, 32), both of which are fixedly connected with the lower cross beam (2).

2. The battery pack and vehicle body sealing structure according to claim 1, wherein The floor (1) is formed with a hollow portion (117), and the top cover of the battery pack (4) is adapted to be arranged in the hollow portion (117) to form at least part of the floor (1).

3. The battery pack and vehicle body sealing structure according to claim 2, wherein, The sealing plate (3) is annularly arranged between the top cover of the battery pack (4) and the vehicle body (100).

4. The battery pack and vehicle body sealing structure according to any one of claims 1 to 3, wherein, At least part of the sealing plate (3) is bent upward along the thickness direction of the lower cross beam (2) to form the first connecting portion (31), which is connected to the side wall of the lower cross beam (2).

5. The battery pack and vehicle body sealing structure according to claim 4, wherein the second connecting portion (32) is connected to the bottom wall of the lower cross beam (2).

6. The battery pack and body sealing structure according to any one of claims 1 to 3, wherein, A sealing member (5) is arranged between the sealing plate (3) and the top cover of the battery pack (4).

7. The battery pack and vehicle body sealing structure according to claim 6, wherein A protruding portion (33) is arranged on the second connecting portion (32), which protrudes from the second connecting portion (32) towards the sealing member (5) and is used for mounting the sealing member (5).

8. The battery pack and vehicle body sealing structure according to claim 7, wherein The protruding portion (33) has a first preset length along the width direction of the lower cross beam (2), which is greater than or equal to 30 mm.

9. The battery pack and body sealing structure according to any one of claims 1-3, wherein, Further comprising a mounting bracket (6), and the battery pack (4) is connected to the lower cross beam (2) through the mounting bracket (6).

10. The battery pack and vehicle body sealing structure according to claim 9, wherein, The mounting bracket (6) is connected to the side wall of the lower cross beam (2), and a mounting point (41) is arranged on the side cover of the battery pack (4), which is fixedly connected with the mounting bracket (6) through a fixing member.

11. A vehicle body, wherein, The vehicle body (100) comprises the battery pack and vehicle body sealing structure according to any one of claims 1-10.

12. The vehicle body of claim 11, wherein, The floor (1) comprises a first floor (111), a second floor (113) and a third floor (115) connected in sequence, and the lower cross beam (2) is arranged below the first floor (111).

13. The vehicle body of claim 12, wherein, Second sealing plates (114) are respectively connected to the two sides of the second floor (113), and the second sealing plates (114) are arranged separately from the second floor (113).

14. The vehicle body according to any one of claims 11-13, wherein, The vehicle body (100) further comprises a rear anti-collision beam assembly (9) and a rear wall (8). The rear wall (8) is connected to the floor (1), and the rear anti-collision beam assembly (9) is connected to the rear wall (8).

15. The vehicle body of claim 14, wherein, The rear anti-collision beam assembly (9) comprises a first connecting plate (90) and an anti-collision beam assembly (91). The first connecting plate (90) is connected to the rear wall (8), and the anti-collision beam assembly (91) is connected to the first connecting plate (90). The first connecting plate (90) and the rear wall (8) have a gap with a second preset length.

16. The vehicle body of claim 15, wherein, The second preset length is 3-5 mm.

17. The vehicle body according to claim 15 or 16, wherein, The anti-collision beam assembly (91) comprises an energy-absorbing box (911), a second connecting plate (912) and an anti-collision beam (913). One side of the energy-absorbing box (911) is connected to the first connecting plate (90), and the other side is connected to the second connecting plate (912), and the second connecting plate (912) is connected to the anti-collision beam (913).

18. The vehicle body according to any one of claims 15-17, wherein, The first connecting plate (90) and the rear wall (8) are connected by a plurality of bolts (92).

19. The vehicle body of claim 18, wherein, The bolts (92) on the side of the rear wall (8) in the height direction are also used to install rear hangers.

20. A vehicle, wherein, The vehicle body (100) comprises the vehicle body (100) according to any one of claims 11-19.

Images