Cover plate, battery pack case, battery pack, and vehicle

Abstract

The present application relates to the technical field of vehicles, and provides a cover plate, a battery pack case, a battery pack and a vehicle. The battery pack case comprises a plurality of side beams and a plurality of cover plates; one side of the cover plate is provided with a connecting portion, the side of the cover plate facing away from the connecting portion is provided with a connecting slot, and the connecting portion is adapted to be inserted into the connecting slot of an adjacent cover plate; a plurality of cover plates are sequentially connected to form an upper cover body; any cover plate forming the upper cover body is provided with a seat cross beam; a plurality of cover plates are sequentially connected to form a lower cover body, and the lower cover body is located below the upper cover body; and the plurality of side beams circumferentially surround the peripheral wall of the upper cover body and are connected to the lower cover body so as to form a battery pack case. The battery pack case of the present application reduces the manufacturing cost of the battery pack case.

Description

A cover plate, a battery pack housing, a battery pack, and a vehicle.

[0001] This application claims priority to Chinese Patent Application No. 2024114549056, filed on October 17, 2024, entitled “A cover plate, a battery pack housing, a battery pack and a vehicle”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of vehicle technology, and particularly to a cover, a battery pack housing, a battery pack, and a vehicle. Background Technology

[0003] With the development of new energy vehicles, significant progress has been made in technological advancement and market penetration in recent years. Battery technology, as a core component of electric vehicles, is also undergoing continuous innovation and optimization.

[0004] Battery pack technology is evolving from cell-to-pack (CTP) to cell-to-body (CTB) integrated battery packs. In CTB technology, the vehicle floor is eliminated, and the battery pack cover takes on the functions of the vehicle floor and integrated seat crossbeams, thereby simplifying the vehicle's structural components.

[0005] However, the upper and lower shells of the aforementioned battery pack are integrally stamped from high-strength steel, resulting in high stamping costs. Summary of the Invention

[0006] The following is a brief summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0007] This application provides a cover plate, a battery pack housing, a battery pack, and a vehicle to solve the problem that the upper and lower housings of the battery pack are integrally stamped from high-strength steel, resulting in high stamping costs.

[0008] On the one hand, this application provides a battery pack housing, including multiple side beams and multiple cover plates;

[0009] A connecting part is provided on one side of the cover plate, and a connecting groove is provided on the side of the cover plate opposite to the connecting part. The connecting part is used to be inserted into the connecting groove of the adjacent cover plate. Multiple cover plates are connected in sequence to form an upper cover. A seat beam is provided on any cover plate forming the upper cover. Multiple cover plates are connected in sequence to form a lower cover, and the lower cover is located below the upper cover.

[0010] Multiple side beams are circumferentially arranged around the periphery of the upper cover and connected to the lower cover to form a battery pack housing.

[0011] In some embodiments, a plurality of the cover plates are sequentially connected along the length of the vehicle to form an upper cover and a lower cover.

[0012] In some embodiments, the seat crossbeam and the cover plate are integrally extruded, and the ends of the seat crossbeam extend to the side beams on both sides of the upper cover.

[0013] In some embodiments, a battery maintenance port is provided on the cover plate forming the upper cover and located at the rear of the vehicle, and a maintenance plate is provided on the battery maintenance port, the maintenance plate being detachably connected to the maintenance port.

[0014] In some embodiments, the side beam includes a transverse structural portion and a longitudinal structural portion, the transverse structural portion and the longitudinal structural portion being integrally formed, the transverse structural portion being connected to the upper cover body, and the longitudinal structural portion being connected to the lower cover body.

[0015] In some embodiments, the connecting portion is welded and fixed to the connecting groove.

[0016] On the one hand, this application provides a cover plate, which adopts the cover plate described above.

[0017] In some embodiments, the cover plate is formed by extrusion of aluminum profile.

[0018] In some embodiments, the cover plate has multiple cavities, which are evenly distributed in a single row.

[0019] On the one hand, this application provides a battery pack, including the battery pack housing described above.

[0020] On the other hand, this application provides a vehicle including the aforementioned battery pack.

[0021] This application provides a cover plate, a battery pack housing, a battery pack, and a vehicle. The battery pack housing is formed by assembling multiple side beams and multiple cover plates. One side of each cover plate has a connecting portion, and the side opposite to the connecting portion has a connecting groove. Multiple cover plates are sequentially spliced ​​to form an upper cover, and multiple cover plates are sequentially spliced ​​to form a lower cover. A seat crossbeam is mounted on any cover plate on the upper cover, and multiple side beams surround the perimeter of the upper cover and connect to the lower cover to form the battery pack housing. By using multiple cover plates to form the battery pack housing, the template size required for manufacturing the battery pack housing is reduced, thereby reducing the manufacturing cost of the battery pack housing. Attached Figure Description

[0022] The accompanying drawings are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0023] Figure 1 is an exploded view of the battery pack provided in an embodiment of this application;

[0024] Figure 2 is a schematic diagram of the connection structure between the upper cover and the side beam in Figure 1;

[0025] Figure 3 is a schematic diagram of a partial cross-section of the upper cover in Figure 2;

[0026] Figure 4 is a schematic diagram of the structure of the lower cover in Figure 1;

[0027] Figure 5 is a partial structural cross-sectional diagram of the upper cover in Figure 4;

[0028] Figure 6 is a schematic diagram of the connection structure of the side beam in Figure 1.

[0029] Explanation of reference numerals in the attached drawings: 100, side beam; 110, transverse structural part; 120, longitudinal structural part; 200, cover plate; 210, connecting part; 220, connecting groove; 230, cavity; 240, battery service port; 250, service plate; 300, seat crossbeam; 400, upper cover; 500, lower cover.

[0030] Other aspects will be understood after reading and understanding the attached figures and detailed description. Detailed Implementation

[0031] 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.

[0032] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] With the development of new energy vehicles, significant progress has been made in technological advancement and market penetration in recent years. Battery technology, as a core component of electric vehicles, is also undergoing continuous innovation and optimization.

[0036] Battery pack technology is evolving from cell-to-pack (CTP) to cell-to-body (CTB) integrated battery packs. In CTB technology, the vehicle floor is eliminated, and the battery pack cover takes on the functions of the vehicle floor and integrated seat crossbeams, thereby simplifying the vehicle's structural components.

[0037] However, the upper and lower shells of the aforementioned battery pack are integrally stamped from high-strength steel, resulting in high stamping costs.

[0038] To address the aforementioned issues, this application provides a cover plate, a battery pack housing, a battery pack, and a vehicle. The battery pack housing is constructed using multiple side beams and multiple cover plates. Each cover plate has a connecting portion on one side and a connecting groove on the side opposite to the connecting portion. Multiple cover plates are sequentially assembled to form an upper cover, and multiple cover plates are sequentially assembled to form a lower cover. A seat crossbeam is mounted on any cover plate on the upper cover, and multiple side beams surround the perimeter of the upper cover and connect to the lower cover to form the battery pack housing. By employing the method of assembling multiple cover plates, the template size required for manufacturing the battery pack housing is reduced, thereby lowering the manufacturing cost of the battery pack housing.

[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0040] On one hand, this application provides a battery pack housing. Referring to Figures 1 to 6, the battery pack housing includes a plurality of side beams 100 and a plurality of cover plates 200.

[0041] A connecting part 210 is provided on one side of the cover plate 200, and a connecting groove 220 is provided on the side of the cover plate 200 away from the connecting part 210. The connecting part 210 is used to be inserted into the connecting groove 220 of the adjacent cover plate 200. Multiple cover plates 200 are connected in sequence to form an upper cover 400. A seat crossbeam 300 is provided on any cover plate 200 that forms the upper cover 400. Multiple cover plates 200 are connected in sequence to form a lower cover 500, and the lower cover 500 is located below the upper cover 400.

[0042] Multiple side beams 100 are circumferentially arranged around the periphery of the upper cover 400 and connected to the lower cover 500 to form the battery pack housing.

[0043] By adopting the above technical solution, the battery pack housing is formed by assembling multiple side beams 100 and multiple cover plates 200. One side of each cover plate 200 has a connecting part 210, and the side opposite to the connecting part 210 has a connecting groove 220. Multiple cover plates 200 are sequentially spliced ​​to form an upper cover 400, and multiple cover plates 200 are sequentially spliced ​​to form a lower cover 500. A seat crossbeam 300 is set on any of the cover plates 200 on the upper cover 400, and multiple side beams 100 are arranged around the perimeter of the upper cover 400 and connected to the lower cover 500 to form the battery pack housing. By using multiple cover plates 200 spliced ​​together, the template size required for manufacturing the battery pack housing is reduced, thereby reducing the manufacturing cost of the battery pack housing.

[0044] The connecting portion 210 on the side of the cover plate 200 is a protrusion, integrally formed with the cover plate 200. The connecting groove 220 on the other side of the cover plate 200 is a recess adapted to the connecting portion 210, facilitating the insertion of the connecting portion 210 into the connecting groove 220. When the connecting portion 210 is inserted into the connecting groove 220 on an adjacent cover plate 200, the connecting portion 210 acts as a limiting element, ensuring that the surfaces of the upper cover 400 or lower cover 500 formed by splicing are all in the same plane, facilitating welding and fixing.

[0045] For example, the connecting part 210 may also be a wedge block, and the connecting groove 220 may be a wedge groove adapted to the connecting part 210.

[0046] For example, the cross-section of the connecting portion 210 can also be triangular, and the cross-section of the connecting groove 220 is a triangle adapted to the connecting portion 210.

[0047] Furthermore, the connecting part 210 is welded and fixed to the connecting groove 220.

[0048] After the connecting part 210 on the cover plate 200 is inserted into the connecting groove 220 of the adjacent cover plate 200, the connecting part 210 is then fixed in the connecting groove 220 by welding, thereby improving the stability and strength of the connection between the two adjacent cover plates 200. Furthermore, compared to directly welding adjacent cover plates 200, the connection part 210 increases the strength of the welded joint of the cover plates 200, reduces welding defects in the upper cover 400 and lower cover 500 after welding, and minimizes stress weaknesses at the weld joint, thus improving the strength of the battery pack housing assembly and enhancing the sealing effect of the battery housing.

[0049] The adjacent cover plates 200 are welded and fixed using friction stir welding and CMT (Cold Metal Transfer) welding to improve welding quality and reduce welding defects.

[0050] The upper cover 400 and lower cover 500 of the battery pack are disassembled into multiple cover plates 200, which are then spliced ​​and welded together to form the upper cover 400 and lower cover 500. This reduces the size of the stamping die used to form the upper cover plate 200, allowing multiple cover plates 200 to be formed by reusing a small die, and then splicing these multiple cover plates 200 together to form the corresponding upper cover 400 and lower cover 500. This further reduces the manufacturing cost of large stamping dies, especially in CTB structures where the upper cover 400 of the battery pack serves as the floor of the vehicle body structure, making it larger than a traditional battery pack and resulting in higher sheet metal stamping die costs. Furthermore, during the process of using cover plates 200 to splice together the upper and lower housings, the required length of cover plates 200 can be adapted to the machine tool cutting operation. Moreover, the cover plates 200 used to form the upper cover 400 and the lower cover 500 are interchangeable, thereby reducing the need for separate manufacturing of the stamping mold for the lower cover 500 and further saving on the production cost of the battery pack.

[0051] On the one hand, this application provides a cover plate, which adopts the cover plate 200 described above.

[0052] In some embodiments, the cover plate 200 is formed by extrusion of aluminum profile.

[0053] The cover plate 200 is made of extruded aluminum profile. Compared with stamped steel parts, aluminum profiles are lighter, which helps to reduce the weight of the battery pack and the vehicle. Furthermore, by extruding the cover plate 200, the cross-section of the cover plate 200 is uniform, and the length of the cover plate 200 can be changed according to actual needs. Alternatively, the cover plate 200 can be manufactured to its maximum length, and the excess portion can be cut off through machining. The machining process is also relatively simple.

[0054] Among them, the extrusion die for the aluminum profile of the cover plate 200 is less expensive and has a shorter mold opening time compared to large stamping dies, and the resulting cover plate 200 can be used interchangeably between the upper cover 400 and the lower cover 500. Furthermore, the extrusion die can be modified according to the needs of the battery pack, and different dies can be manufactured, which is far less expensive than the manufacturing cost of large stamping dies.

[0055] In some embodiments, referring to FIG3, the cover plate 200 has a plurality of cavities 230, which are evenly distributed in a single row.

[0056] The cavity 230 helps to reduce the weight of the cover plate 200 while maintaining its strength. This reduces the weight of the battery pack and the vehicle. Furthermore, the cavity 230 within the cover plate 200 can only be formed by extruding aluminum profiles; traditional battery pack shell sheet metal stamping cannot create a cavity 230 within the shell. This results in a stronger battery pack shell. It exhibits excellent performance in vehicle side pole impact tests, with minimal deformation while withstanding forces exceeding 900KN transmitted by a vehicle side pole impact, thus better protecting the internal structure of the battery pack.

[0057] In some embodiments, referring to Figures 2, 3 and 4, a plurality of cover plates 200 are sequentially connected along the length of the vehicle to form an upper cover 400 and a lower cover 500.

[0058] By adopting the above technical solution, the length direction of the cover plate 200 is the width direction of the vehicle, and the connecting part 210 and the connecting groove 220 are located on both sides of the length direction of the cover plate 200. During the extrusion molding process of the cover plate 200, the cavity 230 is in the same length direction as the cover plate 200, so that the length direction of the cavity 230 inside the cover is perpendicular to the length direction of the vehicle. During the extrusion molding process of the aluminum profile of the cover plate 200, the cavity 230 is formed along the length direction of the cover plate 200, and both ends of the cavity 230 are open. The two ends of the cavity 230 are perpendicular to the driving direction of the vehicle, thereby reducing the whistling effect formed in the cavity 230 during vehicle driving and reducing noise generation.

[0059] Furthermore, during the connection between the side beam 100 of the battery pack housing and the upper cover 400, the side beam 100 seals the cavity 230 on the side of the upper cover 400, further preventing the whistling effect. Additionally, structures for sealing the cavities 230 on both sides of the lower cover 500 are provided on both sides of the lower cover 500.

[0060] In some embodiments, referring to Figures 2 and 3, the seat crossbeam 300 and the cover plate 200 are integrally extruded, and the ends of the seat crossbeam 300 extend to the side beams 100 on both sides of the upper cover 400.

[0061] The seat crossbeam 300 and the cover plate 200 are integrally extruded, resulting in a more stable connection between them. Compared to a welded structure, the integrally formed seat crossbeam 300 has higher strength. Furthermore, by using aluminum profiles for extrusion molding, the seat crossbeam 300 is lighter, reducing the vehicle's weight. Moreover, due to the characteristics of extrusion molding, both the seat crossbeam 300 and the cover plate 200 can have corresponding cavity structures 230, further improving the strength of the seat crossbeam 300, thereby increasing the strength of the upper cover 400.

[0062] Furthermore, the extrusion molds for individual components are low-cost and have short mold opening times. In order to match different sitting postures, different extrusion molds can be designed according to the height of the seat crossbeam 300, making the vehicle more flexible in the manufacturing process.

[0063] For example, referring to Figures 2 and 3, the upper cover 400 includes six cover plates 200 sequentially assembled. The seat crossbeams 300 are located on the second, third, and fifth cover plates 200 of the upper cover 400 in the direction from the front of the vehicle to the rear. The three seat crossbeams 300 can all be configured with the same seating height and shape, requiring only the design of two cover plate 200 molds: one with the seat crossbeams 300 and the other with only the cover plates 200.

[0064] The three seat crossbeams 300 can also be set to different sitting heights or shapes. Only four cover plate 200 molds need to be designed. Three of them have seat crossbeams 300 with different postures, and the last one only has cover plate 200.

[0065] After the cover plate 200 is formed by the mold, the rear of the upper cover 400 is cut into the required shape by a machine tool according to the needs of the battery pack upper cover 400. In addition, a partial notch is cut into the seat crossbeam 300 to increase the rear seat space.

[0066] The upper cover 400 serves as the vehicle floor, sealing the passenger compartment with a sealing strip. The cavity 230 structure of the cover 200 provides more effective heat and sound insulation. It can also eliminate the gap between the battery pack cover and the vehicle floor in the original traditional structure, allowing this space to be used to increase the passenger compartment space or the battery pack space, thereby improving passenger comfort or battery pack capacity.

[0067] Correspondingly, referring to Figures 4 and 5, the lower cover 500 is also formed by splicing together 6 cover plates 200.

[0068] For example, the six cover plates 200 of the lower cover 500 are all made with the same mold as the cover plates 200 of the upper cover 400 that do not have the seat crossbeam 300. Only the cover plates 200 at both ends need to be machined and cut into the corresponding shapes.

[0069] For example, the four cover plates 200 in the middle are all molded with the same mold as the cover plates 200 that do not have the seat crossbeam 300 forming the upper cover 400. The cover plates 200 at both ends of the lower cover 500 may have only a connecting part 210 in one case and only a connecting groove 220 in the other case.

[0070] In some embodiments, a battery maintenance port 240 is provided on a cover plate 200 forming the upper cover 400 and located at the rear of the vehicle. A maintenance plate 250 is provided on the battery maintenance port 240 and is detachably connected to the maintenance port.

[0071] The service port is formed by extruding the cover plate 200 and then machining it. Therefore, the setting of the battery service port 240 does not affect the extrusion molding of the cover plate 200. The service port is located in the rear trunk of the vehicle, and the upper cover 400 of the battery pack serves as the floor of the vehicle body. Therefore, the battery service port 240 can be accessed simply by opening the vehicle trunk, facilitating the maintenance of the battery pack.

[0072] The battery service port 240 extends downwards to provide an installation space for housing the internal control components of the battery pack. These internal control components include a main positive relay, a main negative relay, a pre-charge relay, a pre-charge fuse, a main fuse, an explosion switch, a fast-charge positive relay, a fast-charge negative relay, a current sensor, a battery voltage divider, connecting copper busbars, a low-voltage wiring harness, and a battery management system mainboard.

[0073] The maintenance plate 250 is bolted to the battery service port 240 to seal the battery service port 240, and the upper surface of the maintenance plate 250 is flush with the upper surface of the cover plate 200. A sealing strip is provided between the maintenance plate 250 and the cover plate 200 to improve the sealing effect and prevent the possibility of water leakage.

[0074] In some embodiments, referring to FIG6, the side beam 100 includes a transverse structural portion 110 and a longitudinal structural portion 120, the transverse structural portion 110 and the longitudinal structural portion 120 being integrally formed, the transverse structural portion 110 being connected to the upper cover 400, and the longitudinal structural portion 120 being connected to the lower cover 500.

[0075] The side beams 100 are configured as four, and the four side beams 100 are respectively connected to the four sides of the upper cover 400 and then installed on the lower cover 500 to form the battery pack housing structure.

[0076] All side beams 100 have an L-shaped cross-section, meaning the transverse structural section 110 is perpendicular to the longitudinal structural section 120. The side beams 100 are also formed by extrusion molding of aluminum profiles. The transverse structural section and the longitudinal structural section 120 are integrally molded.

[0077] Furthermore, a connecting groove or connecting part corresponding to the cover plate 200 is also provided on the side of the transverse structural part 110. The connecting part 210 on one side of the upper cover 400 in the length direction of the vehicle body is inserted into the connecting groove of the corresponding side beam 100, and the connecting groove 220 on the other side is inserted into the connecting part of the corresponding side beam 100 and further fixed by welding. This realizes the connection between the upper cover 400 and the two side beams 100.

[0078] The upper cover 400 has connecting grooves on both sides in the width direction of the vehicle body, and the corresponding side beam 100 is provided with a connecting part. The connecting part is inserted into the connecting groove and welded to realize the connection between the side beam 100 and the upper cover 400 in the width direction of the vehicle body.

[0079] The longitudinal structural part 120 of the side beam 100 is located on the lower cover 500 and is connected to the lower cover 500 by bolts, thereby realizing the connection between the lower cover 500 and the side beam 100. A sealing strip is provided between the lower cover 500 and the side beam 100 to seal the gap between the lower cover 500 and the side beam 100.

[0080] On the one hand, this application provides a battery pack, including the battery pack housing described above.

[0081] The internal structure of the battery pack is installed inside the battery pack housing. The battery pack housing in this embodiment has the same structure as the battery pack housing provided in any of the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0082] On the other hand, this application provides a vehicle including the aforementioned battery pack.

[0083] The battery pack is mounted on the vehicle body, and the battery pack casing serves as the floor of the vehicle body. The battery pack in this embodiment has the same structure as the battery pack provided in any of the above embodiments and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0084] The vehicle provided in this application decomposes the battery pack into multiple side beams 100 and multiple cover plates 200. Both the cover plates 200 and the side beams 100 are extruded from aluminum profiles. One side of the cover plate 200 is provided with a connecting part 210, and the side opposite to the connecting part 210 is provided with a connecting groove 220. The multiple cover plates 200 are sequentially spliced ​​to form an upper cover 400, and the multiple cover plates 200 are sequentially spliced ​​to form a lower cover 500. The seat crossbeam 300 is set on any of the cover plates 200 on the upper cover 400, and the multiple side beams 100 surround the perimeter of the upper cover 400 and are connected to the lower cover 500 to form the battery pack housing. By using multiple cover plates 200 spliced ​​together, the template size required to manufacture the battery pack housing is reduced, thereby reducing the manufacturing cost of the battery pack housing.

[0085] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of this application. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0086] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack housing, characterized by, Includes multiple side beams (100) and multiple cover plates (200); A connecting part (210) is provided on one side of the cover plate (200), and a connecting groove (220) is provided on the side of the cover plate (200) away from the connecting part (210). The connecting part (210) is used to be inserted into the connecting groove (220) of the adjacent cover plate (200). Multiple cover plates (200) are connected in sequence to form an upper cover (400). A seat crossbeam (300) is provided on any of the cover plates (200) forming the upper cover (400). Multiple cover plates (200) are connected in sequence to form a lower cover (500). The lower cover (500) is located below the upper cover (400). Multiple side beams (100) are circumferentially arranged around the peripheral wall of the upper cover (400) and connected to the lower cover (500) to form a battery pack housing.

2. The battery pack housing of claim 1, wherein, Multiple cover plates (200) are connected sequentially along the length of the vehicle to form an upper cover (400) and a lower cover (500).

3. The battery pack enclosure of claim 2, wherein, The seat crossbeam (300) and the cover plate (200) are integrally extruded and formed, and the end of the seat crossbeam (300) extends to the side beams (100) on both sides of the upper cover (400).

4. The battery pack housing according to any one of claims 1-3, characterized in that, A battery maintenance port (240) is provided on a cover plate (200) that forms the upper cover body (400) and is located at the rear of the vehicle. A maintenance plate (250) is provided on the battery maintenance port (240), and the maintenance plate (250) is detachably connected to the battery maintenance port (240).

5. The battery pack housing of any one of claims 1-3, wherein, The side beam (100) includes a transverse structural part (110) and a longitudinal structural part (120). The transverse structural part (110) and the longitudinal structural part (120) are integrally formed. The transverse structural part (110) is connected to the upper cover (400), and the longitudinal structural part (120) is connected to the lower cover (500).

6. The battery pack housing of any one of claims 1-3, wherein, The connecting part (210) is welded and fixed to the connecting groove (220).

7. A cover plate characterized by The cover plate is the cover plate (200) as described in any one of claims 1-6.

8. The cover sheet of claim 7, wherein, The cover plate (200) is formed by extrusion of aluminum profile.

9. The cover sheet of claim 7, wherein, The cover plate (200) has multiple cavities (230) inside, and the multiple cavities (230) are evenly distributed in a single row.

10. A battery pack, characterized by, Includes the battery pack housing as described in any one of claims 1-6.

11. A vehicle characterized by comprising: Includes the battery pack as described in claim 10.

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