Battery pack cover plate, battery pack and vehicle

Abstract

The battery pack cover plate comprises a cover plate body and at least one mounting beam connected to the outer surface of the cover plate body and used for mounting an external component; wherein the mounting beam is made of a first material, the cover plate body is made of a second material, and the density of the second material is less than that of the first material. The cover plate body as the main part of the battery pack cover plate can be lightened by using the second material with lower density. Secondly, the mounting beam is used for mounting the external component, and the mounting beam is made of the first material with greater density, which can strengthen the cover plate body and improve the reliability of the connection of the external component. That is, by using the materials with different densities for the cover plate body and the mounting beam, and the second material with lower density for the cover plate body, the weight of the battery pack cover plate as a whole can be reduced, which is beneficial to the lightweight design of the battery pack.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack technology, and more particularly to a battery pack cover, a battery pack, and a vehicle. Background Technology

[0002] With the rapid development of the new energy vehicle industry in recent years, the market has increasingly higher requirements for lightweight power batteries. Lightweight battery packs can improve driving range, reduce energy consumption, and optimize chassis weight to improve vehicle handling.

[0003] In related technologies, battery pack covers are often quite heavy, which is not conducive to the design of lightweight battery packs. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides a battery pack cover, a battery pack, and a vehicle.

[0005] According to a first aspect of this disclosure, a battery pack cover is provided, the battery pack cover including a cover body and at least one mounting beam, the mounting beam being connected to the outer surface of the cover body and used for mounting external components; The mounting beam is made of a first material, and the cover plate body is made of a second material, the density of which is less than that of the first material.

[0006] The cover body, as the main component of the battery pack cover, effectively reduces weight by using a lower-density secondary material. Secondly, the mounting beam, used to install external components, is made of a higher-density primary material. This strengthens the cover body and improves the reliability and stability of the connection to external components. In other words, by using materials of different densities for the cover body and the mounting beam, with the secondary material of the cover body having a lower density, the overall weight of the battery pack cover can be effectively reduced, facilitating lightweight battery pack design.

[0007] In some possible embodiments, the first material is constructed of a first metal, the second material is constructed of a second metal, and the mounting beam is welded to the cover plate body.

[0008] The mounting beam and cover plate are constructed of dissimilar metals and connected by welding. Firstly, the metal construction of both the mounting beam and cover plate ensures sufficient structural strength. Secondly, welding effectively enhances the stability of their connection and reduces the number of connecting components.

[0009] However, this disclosure does not limit the specific material type of the mounting beam and cover plate body. In other embodiments, the mounting beam and cover plate body may also be made of non-metallic materials, such as high-strength composite plastic materials, and this disclosure does not limit this. In addition, this disclosure does not limit the specific connection method of the mounting beam and cover plate body. For example, the mounting beam and cover plate body may also be connected by fasteners.

[0010] In some possible embodiments, the mounting beam and the cover plate body are connected by laser-CMT composite welding; and / or, the mounting beam and the cover plate body are connected by friction plug welding.

[0011] In this process, a powder sprayer and a laser are used to melt a nickel layer onto the steel surface, forming a nickel transition layer. This is then combined with laser-CMT (Cold Metal Transfer) arc welding. The nickel layer isolates the mounting beam and the cover plate body, suppressing the formation of brittle intermetallic compounds. This optimizes the joint, preventing cracks during longitudinal bending. For example, the mounting beam can be made of steel, and the cover plate body can be made of aluminum alloy. Alternatively, in friction plug welding, a high-speed rotating rivet can be pressed down onto the inner surface of the cover plate body. Frictional heat softens the cover plate body locally, allowing the rivet to penetrate and form a mechanical interlock. Continuous pressure fills the gap between the rivet and the mounting beam with the softened second metal, simultaneously forming a plug-welded and riveted composite joint at the rivet tail. For example, the mounting beam can be made of steel, and the cover plate body can be made of aluminum alloy.

[0012] In some possible embodiments, the distance between two adjacent friction plug weld points of the mounting beam and the cover plate body is not less than 20 mm.

[0013] If the weld points are too close together, the heat-affected zones of adjacent weld points will overlap. Repeated heating will lead to stress accumulation, which will easily cause cracks after exceeding the material's yield limit. However, by limiting the distance between weld points to no less than 20mm, the occurrence of cracks can be reduced as much as possible.

[0014] In some possible embodiments, the battery pack cover further includes at least one pressure plate; The mounting beam extends along a first direction, and the pressing plate extends along a second direction intersecting the first direction; The pressing plate includes a connecting portion and at least one pressing portion, wherein the pressing portion is connected to the connecting portion; The connecting part is connected to the outer surface of the cover plate body, and the pressing part is pressed onto the side of the mounting beam away from the cover plate body.

[0015] By incorporating a pressing plate, with its connecting portion attached to the outer surface of the cover plate body and pressed against the mounting beam, the strength of the connection between the mounting beam and the cover plate body is enhanced. Furthermore, the pressing plate also reinforces the structural strength of the cover plate body. Additionally, the mounting beam extends along a first direction, and the pressing plate extends along a second direction intersecting the first direction, further strengthening the cover plate body in both directions and reducing the risk of deformation.

[0016] In some possible embodiments, the connecting portion is connected to the cover plate body by means of fasteners and / or welding; and / or, the crimping portion is connected to the mounting beam by means of fasteners and / or welding.

[0017] The connecting portion may have a first mounting hole, and the cover plate body may have a second mounting hole. Fasteners pass through the first and second mounting holes to achieve a fixed connection between the connecting portion and the cover plate body. Alternatively, the connecting portion may be connected to the cover plate body by welding. Alternatively, the connecting portion may be connected to the cover plate body by fasteners and welded simultaneously, effectively increasing the strength of the connection. And / or, the crimping portion may have a third mounting hole, and the mounting beam may have a fourth mounting hole. Fasteners pass through the third and fourth mounting holes to achieve a fixed connection between the crimping portion and the mounting beam. Alternatively, the crimping portion may be connected to the mounting beam by welding. Alternatively, the crimping portion may be connected to the mounting beam by fasteners and welded simultaneously, effectively increasing the strength of the connection.

[0018] In some possible embodiments, the pressing plate is made of the second material, and the connecting part is connected to the cover plate body by fasteners and brazing; the pressing part is connected to the cover plate body by friction plug welding.

[0019] The pressing plate can be made of aluminum alloy, the mounting beam can be made of steel, and the connection part is connected to the cover plate body by fasteners and brazing. The pressing part of the pressing plate can be fixedly connected to the mounting beam by friction plug welding, which reduces the number of parts and improves the stability of the connection.

[0020] In some possible embodiments, the pressing plate is arranged close to the outer peripheral edge of the cover plate body and extends at least a portion of the outer peripheral edge.

[0021] The pressing plate can effectively reinforce the strength of the outer periphery of the cover plate body.

[0022] In some possible embodiments, the battery pack cover further includes at least one reinforcing plate connected to the outer surface of the cover body; the reinforcing plate is arranged near the outer peripheral edge of the cover body and extends at least a portion of the outer peripheral edge; The reinforcing plate is made of the second material, and the reinforcing plate is connected to the cover plate body by fasteners and / or welding.

[0023] The reinforcing plate effectively strengthens the outer edge of the cover plate body, minimizing deformation or tearing at the edges. Furthermore, the reinforcing plate, made of a second material, is connected to the cover plate body via fasteners and / or welding, effectively enhancing the connection strength.

[0024] In some possible embodiments, the mounting beam includes at least one beam flange and at least one beam protrusion, the beam flange being connected to the beam protrusion and the beam flange being connected to the outer surface of the cover plate body; The crossbeam protrusion extends out of the outer surface of the cover plate body and defines a reinforcing cavity with the cover plate body.

[0025] The crossbeam's flange facilitates its close fit and connection with the cover plate body, enhancing the ease of connection. For example, the crossbeam flange can be welded to the cover plate body. Secondly, the crossbeam protrusion extends beyond the outer surface of the cover plate body and defines a reinforcing cavity. This defined reinforcing cavity effectively enhances the structural strength of the installed crossbeam. On one hand, it strengthens the cover plate body, effectively reducing deformation or tearing; on the other hand, it improves the stability of the installation of external components.

[0026] In some possible embodiments, the battery pack cover further includes an electrical compartment connected to the outer surface of the cover body, and the electrical compartment is made of the second material; The electrical compartment is partially pressed against the side of the mounting beam away from the cover plate body.

[0027] The electrical compartment can house the electrical components of the battery pack. It is connected to the outer surface of the cover body, effectively utilizing the cover body's surface and enhancing its structural strength. Furthermore, the electrical compartment can be made of the same material as the cover body, such as aluminum alloy, ensuring strength while effectively reducing weight and facilitating lightweight design. Regarding the connection method between the electrical compartment and the cover body, welding can be used, resulting in a stable connection and fewer components; however, this disclosure does not limit the specific connection method.

[0028] The electrical compartment can also be press-fitted to the mounting beam, increasing the strength of the connection between the mounting beam and the cover plate body. For example, the electrical compartment may include an electrical compartment body and an electrical compartment flange, with the electrical compartment flange connected to the edge of the electrical compartment body, the bottom plate of the electrical compartment body connected to the cover plate body, and the electrical compartment flange pressed against the flange of the beam to achieve the pressing of the mounting beam. However, this disclosure does not limit the specific structure of the electrical compartment.

[0029] In a second aspect of this disclosure, a battery pack is also provided, the battery pack including a battery pack tray, a battery module, and the battery pack cover; The battery pack tray has a receiving cavity, which includes a cavity opening. The battery module is disposed in the receiving cavity, and the battery pack cover is connected to the battery pack tray and seals the cavity opening.

[0030] The cover body, as the main component of the battery pack cover, effectively reduces weight by using a lower-density secondary material. Secondly, the mounting beam, used to install external components, is made of a higher-density primary material. This strengthens the cover body and improves the reliability and stability of the connection to external components. In other words, by using materials of different densities for the cover body and the mounting beam, with the secondary material of the cover body having a lower density, the overall weight of the battery pack cover can be effectively reduced, facilitating lightweight battery pack design.

[0031] In a third aspect of this disclosure, a vehicle is also provided, the vehicle including a seat and the battery pack, the seat being connected to the mounting beam.

[0032] As the main component of the battery pack cover, the cover body effectively reduces weight by using a lower-density secondary material. Secondly, the mounting beam, used to install external components, is made of a higher-density primary material. This strengthens the cover body and improves the reliability and stability of the connection to external components. In other words, by using materials of different densities for the cover body and the mounting beam, with the secondary material of the cover body having a lower density, the overall weight of the battery pack cover is effectively reduced, facilitating lightweight battery pack design. Furthermore, this mounting beam provides a mounting base for the seat, ensuring the stability of the seat installation.

[0033] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: As the main part of the battery pack cover, the cover body can effectively reduce its weight by using a second material with a lower density. Secondly, the mounting beam is used to install external components, and the mounting beam uses a first material with a higher density. This strengthens the cover body and improves the reliability and stability of the connection to the external components. In other words, by using materials of different densities for the cover body and the mounting beam, and with the second material of the cover body having a lower density, the overall weight of the battery pack cover can be effectively reduced, facilitating lightweight battery pack design.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0036] Figure 1 This is a schematic diagram of the structure of a battery pack cover according to one embodiment of the present disclosure.

[0037] Figure 2 yes Figure 1 A magnified view of a section at point C.

[0038] Figure 3 yes Figure 1 A magnified view of a section at point D.

[0039] Figure 4 This is a schematic diagram of the electrical compartment of a battery pack cover according to one embodiment of the present disclosure.

[0040] Explanation of reference numerals in the attached figures 10. Battery pack cover; 1. Cover plate body; 11. Second mounting hole; 2. Install the crossbeam; 21. Crossbeam flange; 22. Crossbeam protrusion; 220. Reinforcing cavity; 3. Crimping plate; 31. Connecting part; 311. First mounting hole; 32. Crimping part; 4. Reinforcing plate; 5. Electrical compartment; 51. Electrical compartment body; 52. Electrical compartment flange; A. First direction; B. Second direction. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0042] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer contours of a specific structure; directional terms such as "first direction" and "second direction" refer to two intersecting directions, as detailed in the following references. Figure 1 As shown, for example, the first direction can be the length direction of the battery pack, and the second direction can be the width direction of the battery pack; or, the first direction can be the width direction of the battery pack, and the second direction can be the length direction of the battery pack. This disclosure does not limit this. The terms used, such as "first" and "second," are only for distinguishing one element from another and do not have any sequential or important significance.

[0043] Reference Figures 1 to 4 As shown, this disclosure provides a battery pack cover 10, which includes a cover body 1 and at least one mounting beam 2. The mounting beam 2 is connected to the outer surface of the cover body 1 and is used to install external components. The mounting beam 2 is made of a first material, and the cover body 1 is made of a second material, the density of which is less than that of the first material.

[0044] In the above technical solution, the cover body 1, as the main part of the battery pack cover 10, can effectively reduce its weight by using a second material with a lower density. Secondly, the mounting beam 2 is used to install external components (not shown), and the mounting beam 2 uses a first material with a higher density. This strengthens the cover body 1 and improves the reliability and stability of the connection to the external components. In other words, by using materials of different densities for the cover body 1 and the mounting beam 2, and with the second material of the cover body 1 having a lower density, the overall weight of the battery pack cover 10 can be effectively reduced, facilitating the lightweight design of the battery pack.

[0045] In one embodiment, the first material is a first metal, the second material is a second metal, and the mounting beam 2 is welded to the cover plate body 1.

[0046] That is, in this embodiment, the mounting beam 2 and the cover plate body 1 are constructed of dissimilar metals and are connected by welding. First, since both the mounting beam 2 and the cover plate body 1 are constructed of metal, it can be ensured that both the mounting beam 2 and the cover plate body 1 have sufficient structural strength; second, the welding of the mounting beam 2 and the cover plate body 1 can effectively improve the stability of their connection and effectively reduce the number of connecting parts.

[0047] However, this disclosure does not limit the specific material type of the mounting beam 2 and the cover plate body 1. In other embodiments, the mounting beam 2 and the cover plate body 1 may also be made of non-metallic materials, such as high-strength composite plastic materials, and this disclosure does not limit this. In addition, this disclosure does not limit the specific connection method of the mounting beam 2 and the cover plate body 1. For example, the mounting beam 2 and the cover plate body 1 may also be connected by fasteners.

[0048] Optionally, the mounting beam 2 and the cover plate body 1 are connected by laser-CMT composite welding.

[0049] In this embodiment, the powder sprayer and the laser use laser to melt a nickel layer onto the steel surface to form a nickel transition layer. Then, combined with laser-CMT (Cold Metal Transfer) arc composite welding, the nickel layer is used to isolate the mounting beam 2 and the cover plate body 1, suppressing the formation of brittle intermetallic compounds. The optimized joint is free of cracks when bending longitudinally. For example, the mounting beam 2 can be made of steel, and the cover plate body 1 can be made of aluminum alloy.

[0050] Optionally, the mounting beam 2 and the cover plate body 1 can be connected by friction plug welding.

[0051] In this embodiment, using friction plug welding, the high-speed rotating rivet can be pressed down to the inner surface of the cover plate body 1. The frictional heat can locally soften the cover plate body 1, allowing the rivet to penetrate and form a mechanical interlock. Continuous pressing causes the softened second metal to fill the gap between the rivet and the mounting beam 2, while simultaneously forming a composite joint of plug welding and riveting at the rivet tail. For example, the mounting beam 2 can be made of steel, and the cover plate body 1 can be made of aluminum alloy.

[0052] In one embodiment, the distance between two adjacent friction plug riveting weld points of the mounting beam 2 and the cover plate body 1 is not less than 20 mm. In this embodiment, if the weld points are too close, the heat-affected zones of adjacent weld points overlap, and repeated heating will lead to stress accumulation, which will easily cause cracks after exceeding the material yield limit. By limiting the distance between weld points to not less than 20 mm, the occurrence of cracks can be minimized.

[0053] In other implementations, refer to Figure 1 and Figure 2 As shown, the battery pack cover 10 also includes at least one pressing plate 3, the pressing plate 3 including a connecting part 31 and at least one pressing part 32, the pressing part 32 being connected to the connecting part 31; wherein, the connecting part 31 is connected to the outer surface of the cover body 1, and the pressing part 32 is pressed onto the side of the mounting beam 2 away from the cover body 1.

[0054] In this embodiment, by providing a pressing plate 3, with the connecting portion 31 of the pressing plate 3 connected to the outer surface of the cover plate body 1 and the pressing portion 32 pressing against the mounting beam 2, the strength of the mounting beam 2 connected to the cover plate body 1 can be improved. In addition, the pressing plate 3 can also reinforce the structural strength of the cover plate body 1.

[0055] Optionally, refer to Figure 1 As shown, the aforementioned mounting beams 2 can be configured as multiple, and the pressing plates 3 can also be configured as multiple. The mounting beams 2 are provided on the outer surface of the cover plate body 1 along the first direction A. The multiple mounting beams 2 are arranged in pairs in the second direction B. The pressing plates 3 can be arranged between two adjacent mounting beams 2, and the pressing plates 3 are provided along the second direction B. The pressing plates 3 are provided with two pressing parts 32 at both ends in the second direction B. A connecting part 31 is arranged between the two pressing parts 32. The two pressing parts 32 respectively press the two adjacent mounting beams 2 in the second direction B.

[0056] In addition, the pressing plate 3 can be arranged close to the outer peripheral edge of the cover plate body 1 and extend along at least part of the outer peripheral edge, thereby effectively reinforcing the strength of the outer peripheral edge of the cover plate body 1.

[0057] Optionally, refer to Figure 1 and Figure 3 As shown, the connecting part 31 is connected to the cover plate body 1 by fasteners and / or welding. For example, the connecting part 31 may have a first mounting hole 311, and the cover plate body 1 may have a second mounting hole 11. Fasteners pass through the first mounting hole 311 and the second mounting hole 11 to achieve a fixed connection between the connecting part 31 and the cover plate body 1. Alternatively, the connecting part 31 may be connected to the cover plate body 1 by welding. Alternatively, the connecting part 31 may be connected by fasteners and welded to the cover plate body 1 simultaneously, effectively improving the strength of the connection.

[0058] Optionally, the pressing plate 3 and the cover plate body 1 are made of the same material. For example, both the pressing plate 3 and the cover plate body 1 can be made of aluminum alloy, and the connecting part 31 is connected to the cover plate body 1 by fasteners and brazing.

[0059] Optionally, the crimping part 32 is connected to the mounting beam 2 by fasteners and / or welding. For example, the crimping part 32 may have a third mounting hole (not shown), and the mounting beam 2 may have a fourth mounting hole (not shown). Fasteners pass through the third and fourth mounting holes to achieve a fixed connection between the crimping part 32 and the mounting beam 2. Alternatively, the crimping part 32 may be connected to the mounting beam 2 by welding. Or, the crimping part 32 may be connected by fasteners and welded to the mounting beam 2 simultaneously, effectively improving the strength of the connection.

[0060] Optionally, the material of the pressing plate 3 can be aluminum alloy, and the material of the mounting beam 2 can be steel. The pressing part 32 of the pressing plate 3 can be fixedly connected to the mounting beam 2 by friction plug welding, which reduces the number of parts and improves the stability of the connection.

[0061] In other embodiments, the battery pack cover 10 further includes at least one reinforcing plate 4, which is connected to the outer surface of the cover body 1. The reinforcing plate 4 is arranged close to the outer peripheral edge of the cover body 1 and extends along at least a portion of the outer peripheral edge. The reinforcing plate 4 can effectively strengthen the strength of the outer peripheral edge of the cover body 1, minimizing the problem of deformation or tearing at the edge of the cover body 1.

[0062] Optionally, the reinforcing plate 4 can be made of the same material as the cover plate body 1. For example, both the reinforcing plate 4 and the cover plate body 1 can be made of aluminum alloy. The reinforcing plate 4 is connected to the cover plate body 1 by fasteners and brazing. However, this disclosure does not limit the specific material of the reinforcing plate 4 or the connection method with the cover plate body 1.

[0063] Reference Figure 1 As shown, the mounting beam 2 may include at least one beam flange 21 and at least one beam protrusion 22. The beam flange 21 is connected to the beam protrusion 22, and the beam flange 21 is connected to the outer surface of the cover plate body 1. The beam protrusion 22 protrudes from the outer surface of the cover plate body 1 and defines a reinforcing cavity 220 with the cover plate body 1.

[0064] In this embodiment, the crossbeam flange 21 is easy to attach and connect with the cover plate body 1, improving the convenience of connection. For example, the crossbeam flange 21 can be welded to the cover plate body 1. Secondly, the crossbeam protrusion 22 protrudes from the outer surface of the cover plate body 1 and defines a reinforcing cavity 220 with the cover plate body 1. The defined reinforcing cavity 220 can effectively improve the structural strength of the installed crossbeam 2. On the one hand, it can strengthen the cover plate body 1 and effectively reduce the problem of deformation or tearing of the cover plate body 1; on the other hand, it can improve the stability of the installation of external components.

[0065] Optionally, refer to Figure 1 and Figure 4 As shown, the battery pack cover 10 also includes an electrical compartment 5, which is connected to the outer surface of the cover body 1, and the electrical compartment 5 is made of a second material.

[0066] In this embodiment, the electrical compartment 5 can be used to house the electrical components of the battery pack. The electrical compartment is connected to the outer surface of the cover body 1, effectively utilizing the outer surface of the cover body 1 and improving its structural strength. Furthermore, the electrical compartment 5 can be made of the same material as the cover body 1, for example, aluminum alloy, ensuring strength while effectively reducing weight, facilitating lightweight design. Regarding the connection method between the electrical compartment 5 and the cover body 1, welding can be used, resulting in a stable connection and fewer components; however, this disclosure does not limit the specific connection method.

[0067] Optionally, a portion of the electrical compartment 5 is pressed against the side of the mounting beam 2 away from the cover body 1. That is, the electrical compartment 5 can also press against the mounting beam 2, increasing the strength of the connection between the mounting beam 2 and the cover body 1. For example, the electrical compartment 5 may include an electrical compartment body 51 and an electrical compartment flange 52. The electrical compartment flange 52 is connected to the edge of the electrical compartment body 51, the bottom plate of the electrical compartment body 51 is connected to the cover body 1, and the electrical compartment flange 52 is pressed against the beam flange 21 to achieve the pressing against the mounting beam 2. However, this disclosure does not limit the specific structure of the electrical compartment 5.

[0068] This disclosure also provides a battery pack, which includes a battery pack tray (not shown), a battery module (not shown), and the aforementioned battery pack cover 10; the battery pack tray forms a receiving cavity (not shown), the receiving cavity includes a cavity opening (not shown), the battery module is disposed in the receiving cavity, and the battery pack cover 10 is connected to the battery pack tray and seals the cavity opening.

[0069] In the above technical solution, the cover body 1, as the main part of the battery pack cover 10, can effectively reduce its weight by using a second material with a lower density. Secondly, the mounting beam 2 is used to install external components (not shown), and the mounting beam 2 uses a first material with a higher density. This strengthens the cover body 1 and improves the reliability and stability of the connection to the external components. In other words, by using materials of different densities for the cover body 1 and the mounting beam 2, and with the second material of the cover body 1 having a lower density, the overall weight of the battery pack cover 10 can be effectively reduced, facilitating the lightweight design of the battery pack.

[0070] This disclosure also provides a vehicle including a seat (not shown) and the aforementioned battery pack, the seat being connected to the mounting beam 2.

[0071] In the above technical solution, the cover body 1, as the main part of the battery pack cover 10, can effectively reduce its weight by using a second material with a lower density. Secondly, the mounting beam 2 is used to install external components (not shown), and the mounting beam 2 uses a first material with a higher density. This strengthens the cover body 1 and improves the reliability and stability of the connection to the external components. In other words, by using materials of different densities for the cover body 1 and the mounting beam 2, and with the second material of the cover body 1 having a lower density, the overall weight of the battery pack cover 10 can be effectively reduced, facilitating lightweight battery pack design. Furthermore, the mounting beam 2 provides a mounting base for the seat, ensuring the stability of the seat installation.

[0072] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0073] It should be understood that this disclosure is not limited to the precise structures 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 disclosure is limited only by the appended claims.

Claims

1. A battery pack cover plate, characterized by, The battery pack cover includes a cover body and at least one mounting beam, the mounting beam being connected to the outer surface of the cover body and used for mounting external components; The mounting beam is made of a first material, and the cover plate body is made of a second material, the density of which is less than that of the first material.

2. The battery pack cover plate of claim 1, wherein, The first material is a first metal, the second material is a second metal, and the mounting beam is welded to the cover plate body.

3. The battery pack cover plate of claim 2, wherein, in, The mounting beam and the cover plate body are connected by laser-CMT composite welding; and / or, the mounting beam and the cover plate body are connected by friction plug welding.

4. The battery pack cover plate of claim 3, wherein, The distance between the weld points of two adjacent friction plugs of the mounting beam and the cover plate body shall not be less than 20mm.

5. The battery pack cover plate of claim 1, wherein, The battery pack cover also includes at least one pressure plate; The mounting beam extends along a first direction, and the pressing plate extends along a second direction intersecting the first direction; The pressing plate includes a connecting portion and at least one pressing portion, wherein the pressing portion is connected to the connecting portion; The connecting part is connected to the outer surface of the cover plate body, and the pressing part is pressed onto the side of the mounting beam away from the cover plate body.

6. The battery pack cover plate of claim 5, wherein, The connecting part is connected to the cover plate body by means of fasteners and / or welding; and / or, the crimping part is connected to the mounting beam by means of fasteners and / or welding.

7. The battery pack cover plate of claim 5 or 6, wherein, The pressing plate is made of the second material, and the connecting part is connected to the cover plate body by fasteners and brazing; the pressing part is connected to the cover plate body by friction plug welding.

8. The battery pack cover plate of claim 5 or 6, wherein, The pressing plate is arranged close to the outer peripheral edge of the cover plate body and extends at least a portion of the outer peripheral edge.

9. The battery pack cover plate of claim 1, wherein, The battery pack cover also includes at least one reinforcing plate, which is connected to the outer surface of the cover body; the reinforcing plate is arranged near the outer peripheral edge of the cover body and extends at least a portion of the outer peripheral edge; The reinforcing plate is made of the second material, and the reinforcing plate is connected to the cover plate body by fasteners and / or welding.

10. The battery pack cover plate of claim 1, wherein, The mounting beam includes at least one beam flange and at least one beam protrusion, the beam flange is connected to the beam protrusion, and the beam flange is connected to the outer surface of the cover plate body. The crossbeam protrusion extends out of the outer surface of the cover plate body and defines a reinforcing cavity with the cover plate body.

11. The battery pack cover plate of claim 1, wherein, The battery pack cover also includes an electrical compartment, which is connected to the outer surface of the cover body and is made of the second material; The electrical compartment is partially pressed against the side of the mounting beam away from the cover plate body.

12. A battery pack, characterized by, The battery pack includes a battery pack tray, a battery module, and a battery pack cover as described in any one of claims 1-11; The battery pack tray has a receiving cavity, which includes a cavity opening. The battery module is disposed in the receiving cavity, and the battery pack cover is connected to the battery pack tray and seals the cavity opening.

13. A vehicle characterized by comprising: The vehicle includes a seat and the battery pack of claim 12, the seat being connected to the mounting cross beam.

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