Battery cover, battery pack, and vehicle

Abstract

The present disclosure relates to the field of batteries, and relates to a battery cover, a battery pack, and a vehicle. The battery cover comprises: a cover body, the cover body having a first side edge and a second side edge adjacent to each other, the first side edge being connected to a first side wall, and a plane in which the first side wall is located intersecting a plane in which the cover body is located; and a connecting side wall, the connecting side wall connecting the second side edge to the end of the first side wall close to a third side edge. In embodiments of the present application, by providing the connecting side wall, it can be ensured that the battery cover seals an opening of the battery pack. Moreover, the provision of the first side wall can reduce the amount of material used for a case of the battery pack, helping reduce the weight of the battery pack, thereby achieving lightweight design of the battery pack.

Description

Battery cover, battery pack and vehicle

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510379706.1, filed on March 27, 2025, entitled "Battery Cover, Battery Pack and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of batteries, specifically to a battery cover, a battery pack, and a vehicle. Background Technology

[0004] With the development of technology, battery technology has gradually matured, enabling the installation of battery packs in vehicles to provide power and achieve fuel savings. Typically, a battery pack consists of a casing and a cover. The casing has an opening and houses the battery cell modules. The cover closes to the opening, thus sealing it. However, in these technologies, the battery packs are relatively heavy, which is detrimental to weight reduction. Summary of the Invention

[0005] The purpose of this application is to provide a battery cover, a battery pack, and a vehicle, at least to solve the problem that the battery pack is too heavy, which is not conducive to the lightweighting of the battery pack.

[0006] In a first aspect, embodiments of this application provide a battery cover, the battery cover comprising: a cover body;

[0007] The cover includes an adjacent first side and a second side, the first side is connected to a first sidewall, and the plane of the first sidewall intersects with the plane of the cover.

[0008] A connecting sidewall is provided, which connects the second sidewall and the end of the first sidewall near the third sidewall.

[0009] Optionally, the cover includes two first side edges arranged opposite each other along a first direction, the two first side edges are respectively connected to two first side walls, the two first side walls protrude from the same side of the cover, and the two first side walls extend in the same direction.

[0010] Optionally, the cover includes two second sidewalls arranged opposite each other along a second direction, and the two ends of the first sidewall are respectively connected to the adjacent second sidewalls through the connecting sidewalls, wherein the first direction intersects the second direction.

[0011] Optionally, the planes containing the two first sidewalls are perpendicular to the plane containing the cover, and the two first sidewalls have the same extension height.

[0012] Optionally, the connecting sidewall is configured as a curved surface.

[0013] Optionally, the length of the connecting sidewall of the curved surface gradually decreases along the direction from the end of the first sidewall to the second side adjacent to the first sidewall.

[0014] Optionally, the cover has an inner surface, and the inner surface is provided with a fireproof layer, the fireproof layer and the cover being an integral structure.

[0015] Optionally, a plurality of second reinforcing ribs are provided on the outer surface of the cover near the first sidewall, and a plurality of third reinforcing ribs are provided on the outer surface of the first sidewall. The second reinforcing member is connected to the third reinforcing ribs, and the plurality of third reinforcing ribs are spaced apart.

[0016] Optionally, the battery cover further includes a first seal;

[0017] The cover is provided with a connection hole, the first sealing member is connected to the outer surface of the cover, and the first sealing member is arranged around the connection hole.

[0018] Optionally, the cover includes a first region and a second region connected together, the connecting hole is disposed in the first region, and the thickness of the first region is greater than the thickness of the second region.

[0019] Optionally, the thickness of the connecting sidewall is greater than or equal to the thickness of the cover.

[0020] Secondly, embodiments of this application provide a battery pack, the battery pack including a housing and a battery cover as described in any one of the first aspects above;

[0021] The housing has an opening, and the battery cover closes to the opening.

[0022] Thirdly, embodiments of this application provide a vehicle, the vehicle including a vehicle body and the battery pack described in the second aspect above;

[0023] The battery pack is installed on the vehicle body.

[0024] In this embodiment, since the first side is connected to the first sidewall, and the plane of the first sidewall intersects with the plane of the cover, the first sidewall can protrude from the cover. Thus, when the battery cover is used in the battery pack, the battery cover can be closed at the opening of the battery pack shell, that is, the first sidewall is connected to the opening of the shell. However, since the first sidewall protrudes from the cover, it is equivalent to the first sidewall and the cover not being on the same plane. That is, the first sidewall, the first side, and the second side are not on the same plane, which makes the connection between the battery cover and the shell uneven. As a result, the opening of the shell will also be uneven. That is, when the first sidewall is connected to the opening of the shell, an avoidance position is formed at the opening of the shell where it is connected to the first sidewall. This reduces the amount of material used at the opening of the shell where it is connected to the first sidewall, thereby reducing the mass of the shell and the mass of the battery pack. Furthermore, the connecting sidewall connects the second side and the end of the first sidewall closest to the second side. Therefore, even if there is a height difference between the second side and the first sidewall, the connecting sidewall allows for a smooth transition of this height difference. This ensures that when the battery cover is closed at the opening, both ends of the first sidewall are sealed, preventing gaps at either end and facilitating a proper seal of the battery pack's opening. In other words, in this embodiment, by providing the connecting sidewall, the battery cover can be ensured to seal the battery pack's opening. Furthermore, the presence of the first sidewall reduces the material used in the battery pack's casing, contributing to a lighter battery pack. Attached Figure Description

[0025] Figure 1 shows one of the schematic diagrams of a battery cover provided in an embodiment of this application;

[0026] Figure 2 shows an exploded view of a battery cover provided in an embodiment of this application;

[0027] Figure 3 shows a second schematic diagram of a battery cover provided in an embodiment of this application;

[0028] Figure 4 shows a third schematic diagram of a battery cover provided in an embodiment of this application;

[0029] Figure 5 shows a fourth schematic diagram of a battery cover provided in an embodiment of this application;

[0030] Figure 6 shows a fifth schematic diagram of a battery cover provided in an embodiment of this application;

[0031] Figure 7 shows one of the screenshots of a battery cover provided in an embodiment of this application;

[0032] Figure 8 shows a second screenshot of a battery cover provided in an embodiment of this application;

[0033] Figure 9 shows a third screenshot of a battery cover provided in an embodiment of this application;

[0034] Figure 10 shows a sixth schematic diagram of a battery cover provided in an embodiment of this application;

[0035] Figure 11 shows a side view of a battery cover provided in an embodiment of this application.

[0036] Reference numerals: 001: Connecting sidewall; 002: Connecting boss; 003: Structural adhesive; 004: Connecting flange; 10: Cover; 11: Fireproof layer; 101: First side; 102: Second side; 105: Connecting hole; 20: First reinforcing rib; 30: Second reinforcing rib; 31: Third reinforcing rib; 40: First sealing element; 50: Metal nest; 51: Connecting part; 52: Mounting part; 511: Boss; 521: Through hole; 60: Second sealing element; 70: Insulating sheet; 80: Upper buffer assembly; 90: Lower buffer assembly; 1001: First area; 1002: Second area; 100: First sidewall; X: First direction; Y: Second direction; Z: Third direction; 1000: Floor; 2000: Longitudinal beam. Specific Implementation

[0037] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] As shown in Figures 1 to 11, the battery cover includes a cover body 10. The cover body 10 includes an adjacent first side 101 and a second side 102. The first side 101 is connected to a first side wall 100, and the plane of the first side wall 100 intersects with the plane of the cover body 10. A connecting side wall 001 connects the second side 102 and the end of the first side wall 100 near the second side 102.

[0041] In this embodiment, since the first sidewall 101 is connected to the first sidewall 100, and the plane of the first sidewall 100 intersects with the plane of the cover 10, the first sidewall 100 can protrude from the cover 10. Therefore, when the battery cover is used in a battery pack, it can be closed at the opening of the battery pack housing, i.e., the first sidewall 100 is connected to the opening of the housing. However, since the first sidewall 100 protrudes from the cover 10, it is equivalent to the first sidewall 100 and the cover 10 not being on the same plane. The side wall 100, the first side 101, and the second side 102 are not on the same plane, resulting in an uneven structure at the connection between the battery cover and the housing. Consequently, the opening of the housing will also have an uneven structure. That is, when the first side wall 100 is connected to the opening of the housing, a clearance position is formed at the opening of the housing where it is connected to the first side wall 100. This reduces the amount of material used at the opening of the housing where it is connected to the first side wall 100, thereby reducing the weight of the housing and the battery pack. Furthermore, the connecting sidewall 001 connects the second side 102 and the end of the first sidewall 100 closest to the second side 102. Therefore, even if there is a height difference between the second side 102 and the first sidewall 100, the connecting sidewall 001 allows for a smooth transition of the height difference between the first sidewall 100 and the second side 102. This ensures that when the battery cover is closed at the opening, the connecting sidewall 001 guarantees that both ends of the first sidewall 100 are sealed, preventing gaps at both ends of the first sidewall 100. This facilitates the cover 10 in sealing the opening of the battery pack housing. In other words, in this embodiment, by providing the connecting sidewall 001, the battery cover can be ensured to seal the opening of the battery pack. Furthermore, the presence of the first sidewall 100 reduces the material used in the battery pack housing, helping to reduce the weight of the battery pack and thus contributing to its lightweight design.

[0042] It should be noted that the plane containing the first sidewall 100 can be perpendicular to the plane containing the cover 10. Of course, the angle between the plane containing the first sidewall 100 and the plane containing the cover 10 can also be close to 90°. For example, the angle between the plane containing the first sidewall 100 and the plane containing the cover 10 is 93°, or even 88°. Of course, the angle between the plane containing the first sidewall 100 and the plane containing the cover 10 can also be other angles, such as 120°. This embodiment of the application does not limit this aspect.

[0043] In addition, in some embodiments, the cover 10 may include two first side edges 101 disposed opposite to each other along the first direction X. The two first side edges 101 are respectively connected to two first side walls 100. The two first side walls 100 protrude from the same side of the cover 10, and the two first side walls 100 extend in the same direction.

[0044] With this configuration, when the battery cover is applied to the battery pack, it can be closed at the opening of the battery pack shell, meaning that both first sidewalls 100 are connected to the opening of the shell. Both first sidewalls 100 protrude from the same side of the cover 10, meaning that neither the two first sidewalls 100 nor the cover 10 are on the same plane. This results in an uneven structure at the connection between the battery cover and the shell, and consequently, an uneven structure at the opening of the shell. When the two first sidewalls 100 are connected to the opening of the shell, a clearance position is created at the opening, reducing the amount of material used at the connection point. This further reduces the material used in the shell, thus reducing the weight of the shell and the battery pack.

[0045] In addition, in some embodiments, the cover 10 may include two second sidewalls 102 disposed opposite to each other along the second direction Y, and the two ends of the first sidewall 100 are respectively connected to the adjacent second sidewalls 102 by connecting sidewalls 001, and the first direction X intersects the second direction Y.

[0046] Since both ends of the first sidewall 100 are connected to their adjacent second sidewalls 102 via connecting sidewalls 001, it is equivalent to each end of the first sidewall 100 being connected to its adjacent second sidewall 102 via connecting sidewalls 001. Therefore, even if there is a height difference between each end of the first sidewall 100 and the second sidewall 102, the connecting sidewalls 001 allow for a smooth transition of this height difference. Thus, when the battery cover is closed at the opening, the connecting sidewalls 001 ensure that both ends of each first sidewall 100 are sealed, preventing any space at the ends of each first sidewall 100. This facilitates the cover 10 sealing the opening of the battery pack housing. In other words, by setting the two ends of the first sidewall 100 to be connected to their adjacent second sidewalls 102 via connecting sidewalls 001, it is ensured that the battery cover seals the opening of the battery pack.

[0047] In some embodiments, the plane containing the two first sidewalls 100 is perpendicular to the plane containing the cover 10, and the two first sidewalls 100 have the same extension height. With this arrangement, when the battery cover is applied to the battery pack, it can be fitted onto the opening of the battery pack housing, i.e., the first sidewalls 100 are connected to the opening of the housing. Since the two first sidewalls 100 have the same extension height, the opening of the battery pack housing can be provided with the same clearance position, making the battery pack housing easier to manufacture. Furthermore, the equal extension height of the two first sidewalls 100 also makes the battery pack more symmetrical when the battery cover is applied, improving the structural symmetry of the battery pack.

[0048] In some embodiments, the connecting sidewall 001 is curved. This design allows for a smoother transition when the height difference between the end of the first sidewall 100 and the second sidewall 102 is between the connecting sidewall 001 and the first sidewall 100. Furthermore, the curved surface of the connecting sidewall 001 prevents it from being too sharp, thus avoiding the possibility of the battery cover being too sharp at the connecting sidewall 001 when used in the battery pack, and preventing the battery pack from easily scratching other components.

[0049] It should be noted that in this embodiment of the application, the surface of the connecting sidewall 001 is set as a curved surface. The curved surface can be a curved surface that protrudes along the end away from the first sidewall 100. Of course, the curved surface can also be other shapes. For example, the surface of the connecting sidewall 001 is a concave-convex surface, that is, the curved surface is a concave-convex surface. Another example is that the surface of the connecting sidewall 001 is a curved surface that is concave along the end toward the first sidewall 100.

[0050] In addition, in some embodiments, the length of the connecting sidewall 001 of the curved surface gradually decreases along the direction from the end of the first sidewall 100 to the adjacent second sidewall 102 of the first sidewall 100.

[0051] The middle part of the cover 10 is relatively flat, and the first side 101 is inclined relative to the middle part of the cover 10. This means that the middle parts of the first side 101 and the second side 102 are not on the same plane. Therefore, by setting the length of the curved connecting side wall 001 gradually decreases from the end of the first side wall 100 to the adjacent second side wall 102, the connecting side wall 001 can better compensate for the height difference between the middle parts of the first side wall 101 and the second side wall 102. This makes the end of the first side wall 100 away from the cover 10 as close to the second side wall as possible on the same plane. This helps the connecting side wall 001 seal the space between the end of the first side wall 100 and the second side wall 102. Thus, when the battery cover is used in the battery pack, the connecting side wall 001 can better seal the space between the end of the first side wall 100 and the second side wall 102, improving the sealing performance of the battery pack.

[0052] In addition, in some embodiments, the thickness of the connecting sidewall 001 is greater than or equal to the thickness of the cover 10. This configuration effectively increases the strength of the connecting sidewall 001, thereby ensuring the increased strength of the battery cover, preventing the connecting sidewall 001 from easily deforming, and improving the sealing performance of the battery cover when connected to the battery pack housing.

[0053] It should be noted that the wall thickness of the battery pack casing is greater than the thickness of the first sidewall 100, and the wall thickness of the casing is greater than the thickness of the second sidewall 200. Typically, the casing wall thickness is greater than 25mm. By using the battery cover provided in this embodiment, when the battery cover is installed on the battery pack casing, the connection point between the casing and the first sidewall 100 in the first direction X can be avoided. Therefore, after the first sidewall 100 is connected to the opening of the casing, the first sidewall 100 replaces the casing wall in the first direction X. Since the wall thickness of the first sidewall 100 is less than the casing wall thickness, the size of the battery pack can be reduced in the first direction X, achieving the purpose of saving space in the first direction X.

[0054] Furthermore, in this embodiment, the thickness of the first sidewall 100 can be in the range of 1-2 mm, that is, the thickness of the first sidewall 100 can be any value between 1 and 2 mm. For example, the thickness of the first sidewall 100 is 1 mm, another example is 1.5 mm, and yet another example is 2 mm. This embodiment does not limit the specific thickness of the first sidewall 100.

[0055] In addition, in this embodiment of the application, the battery cover may also include a connecting flange 004, which is connected to the edge of the first sidewall 100, the edge of the second sidewall 102 and the edge of the connecting sidewall 001 respectively. The connecting flange 004 extends along the circumferential direction of the cover body 10. The connecting flange 004 is provided with mounting holes, so that when the battery cover is connected to the opening of the battery pack housing, the connecting flange 004 can be connected to the housing by passing a connector through the mounting holes on the connecting flange 004, thereby realizing the connection between the battery cover and the housing.

[0056] In addition, in this embodiment, the first direction X can be a direction parallel to the left-right direction of the vehicle, which is the direction from the driver's seat to the passenger seat; the second direction Y can be a direction parallel to the front-rear direction of the vehicle, which is the direction from the front to the rear of the vehicle.

[0057] In some embodiments, the cover 10 has an inner surface with a fire-resistant layer 11, the fire-resistant layer 11 covering at least a portion of the inner surface. The inner surface is the surface of the cover 10 facing the first sidewall 100 in the direction in which the first sidewall 100 protrudes from the cover 10. The fire-resistant layer 11 and the cover 10 can be an integral structure.

[0058] Because a fire-resistant layer 11 is provided on the inner surface, and the fire-resistant layer 11 covers at least a portion of the inner surface, when the battery cover is used in the battery pack, that is, when the battery cover is connected to the battery pack shell, the fire-resistant layer 11 on the battery cover can make the battery cover fire-resistant, preventing the battery cover from being easily flammable and thus reducing the safety of the battery pack. By making the fire-resistant layer 11 and the cover body 10 an integral structure, the problem of the fire-resistant layer 11 easily separating from the cover body 10 can be avoided, and the fire-resistant layer 11 can be avoided by adhesive bonding, saving adhesive and reducing the cost of the battery cover.

[0059] It should be noted that the fireproof layer 11 can be made of a material that undergoes chemical cross-linking with the material of the cover 10 at high temperatures, thereby giving the fireproof layer 11 and the cover 10 a strong bond. The cover 10 is typically made of resin, and the fireproof layer 11 is made of a material that undergoes chemical cross-linking with the resin at high temperatures.

[0060] It should be noted that in this embodiment of the application, the fireproof layer 11 may cover part of the inner surface of the cover 10. When the cover 10 is provided with a connection hole 105, and a mounting member passes through the connection hole 105 to mount the battery pack in the vehicle, the fireproof layer 11 may not cover the connection hole 105, and the fireproof layer 11 is not covered around the connection hole 105.

[0061] In addition, in some embodiments, the cover 10 also has an outer surface that is opposite to the inner surface in the third direction Z. A first reinforcing rib 20 is provided on the outer surface and the first reinforcing rib 20 is located in the area where the outer surface is located. The third direction Z intersects with both the first direction X and the second direction Y.

[0062] Because the outer surface of the cover 10 is provided with a first reinforcing rib 20, and the first reinforcing rib 20 is located in the area of ​​the outer surface, it is equivalent to the first reinforcing rib 20 being only located within the outer surface of the cover 10 and not extending beyond the outer surface of the cover 10. Therefore, the first reinforcing rib 20 can effectively improve the strength of the cover 10 and avoid the problem of the cover 10 being easily deformed. That is, by providing the first reinforcing rib 20 on the outer surface of the cover 10, it can be ensured that the cover 10 is not easily deformed in practical applications, thereby improving the safety of the battery pack.

[0063] It should be noted that there can be multiple first reinforcing ribs 20. Some of these first reinforcing ribs 20 can extend along the first direction X, while others can extend along the second direction Y. This is equivalent to a crisscrossing arrangement of reinforcing ribs on the outer surface of the cover 10, which helps to improve the strength of the cover 10. The number of first reinforcing ribs 20 can be set according to actual needs; for example, there can be 10 first reinforcing ribs 20, or 12. The specific number of first reinforcing ribs 20 is not limited in this embodiment. Furthermore, in this embodiment, the first reinforcing ribs 20 can be formed by creating a recessed structure on the outer surface of the shell 10, i.e., by recessing the outer surface of the shell 10 to form the first reinforcing ribs 20. Alternatively, the first reinforcing ribs 20 can be additionally connected to the outer surface of the shell 10, i.e., by welding the first reinforcing ribs 20 to the outer surface of the shell 10; or the first reinforcing ribs 20 can be formed by creating a protruding structure on the outer surface of the shell 10, i.e., by protruding the outer surface of the shell 10 to form the first reinforcing ribs 20. The embodiments described in this application are not limited in this respect.

[0064] In addition, in practical applications, the first reinforcing ribs 20 can be arranged on the outer surface of the cover 10 so that the first reinforcing ribs 20 avoid the area where the battery pack interferes with the internal structure of the vehicle, that is, avoid the first reinforcing ribs 20 affecting the installation of the battery pack in the vehicle.

[0065] In addition, in some embodiments, a plurality of second reinforcing ribs 30 are provided on the outer surface of the cover 10 near the first sidewall 100, and a plurality of third reinforcing ribs 31 are provided on the outer surface of the first sidewall 100. The second reinforcing members 30 are connected to the third reinforcing ribs 31, and the plurality of third reinforcing ribs 31 are distributed at intervals.

[0066] Since the outer surface of the first sidewall 100 is provided with a plurality of third reinforcing ribs 31, and the second reinforcing member 30 is connected to the third reinforcing ribs 31, it is equivalent to the reinforcing ribs on the outer surface of the cover 10 extending to the sidewall, thereby making the connection between the cover 10 and the first sidewall 100 more secure, and increasing the strength at the connection between the first sidewall 100 and the cover 10, and also making the connection between the cover 10 and the second sidewall 200 more secure, and increasing the strength at the connection between the second sidewall 200 and the cover 10.

[0067] It should be noted that in the embodiments of this application, the first sidewall 100, the connecting sidewall 001 and the cover 10 can be an integral structure, that is, the cover 10, the connecting sidewall 001 and the first sidewall 100 can be integrally formed by a molding process, including but not limited to compression molding process, wet molding process, RTM / HP-RTM molding process, sheet metal stamping process, etc.

[0068] Of course, the first sidewall 100 can also be connected to the cover 10 by welding, and the connecting sidewall 001 can also be connected to the cover 10 by welding. This application embodiment does not limit this.

[0069] In addition, in this embodiment, the second reinforcing rib 30 can be formed by providing a recessed structure on the outer surface of the housing 10, that is, by recessing the outer surface of the housing 10 to form the second reinforcing rib 30. Of course, the second reinforcing rib 30 can also be additionally connected to the outer surface of the housing 10, that is, by welding the second reinforcing rib 30 to the outer surface of the housing 10; or the second reinforcing rib 30 can be formed by providing a protruding structure on the outer surface of the housing 10, that is, by protruding the outer surface of the housing 10 to form the second reinforcing rib 30. This embodiment does not limit the specific method used in this application. Furthermore, the third reinforcing rib 31 can be formed by providing a recessed structure on the outer surface of the first sidewall 100, that is, by recessing the outer surface of the first sidewall 100 to form the third reinforcing rib 31. Of course, the third reinforcing rib 31 can also be additionally connected to the outer surface of the first sidewall 100, that is, by welding the third reinforcing rib 31 to the outer surface of the first sidewall 100; or the third reinforcing rib 31 can be formed by providing a protruding structure on the outer surface of the first sidewall 100, that is, by protruding the outer surface of the first sidewall 100 to form the third reinforcing rib 31. This embodiment does not limit the specific method used in this application. The second reinforcing rib 30 has the same form as the third reinforcing rib 31. That is, when the second reinforcing rib 30 is formed as a concave structure, the third reinforcing rib 31 is also formed as a concave structure; when the second reinforcing rib 30 is formed as a convex structure, the third reinforcing rib 31 is also formed as a convex structure.

[0070] In some embodiments, the battery cover may also include a mounting member and a first sealing member 40; the cover body 10 is provided with a connection hole 105, the mounting member passes through the connection hole 105, and part of the mounting member protrudes from the outer surface of the cover body 10, while another part of the mounting member protrudes from the inner surface of the cover body 10. The first sealing member 40 is connected to the outer surface of the cover body 10 and is arranged around the mounting member. The part of the mounting member protruding from the outer surface of the cover body 10 is used to connect to the internal structure of the vehicle, and the part of the mounting member protruding from the inner surface of the cover body 10 is used to connect to the structure of the battery pack; wherein, the outer surface is the surface of the cover body 10 facing away from the first sidewall 100, and the inner surface is the surface of the cover body 10 facing the first sidewall 100.

[0071] Since the cover 10 is provided with a connection hole 105, the mounting member passes through the connection hole 105, and part of the mounting member protrudes from the outer surface of the cover 10, while the other part of the mounting member protrudes from the inner surface of the cover 10, when the battery cover is installed in the battery pack, the part of the mounting member protruding from the inner surface of the cover 10 can be connected to the structure of the battery pack, for example, it can be connected to the crossbeam or longitudinal beam 2000 inside the battery pack. Then, when the battery pack is installed in the vehicle, the part of the mounting member protruding from the outer surface of the cover 10 can be connected to the internal structure of the vehicle, for example, it can be connected to the vehicle floor 1000. Since the first seal 40 is connected to the outer surface of the cover 10 and surrounds the mounting member, when the battery pack is connected to the internal structure of the vehicle, the portion of the mounting member protruding from the outer surface of the cover 10 will come into contact with the internal structure of the vehicle, and the first seal 40 will also come into contact with the internal structure of the vehicle. The first seal 40 may even be compressed by the internal structure of the vehicle, thereby ensuring that after the portion of the mounting member protruding from the outer surface of the cover 10 is connected to the internal structure of the vehicle, this portion of the mounting member is protected by the first seal 40, preventing liquids or other corrosive substances from coming into contact with this portion of the mounting member, thereby effectively preventing this portion of the mounting member from aging and failing easily. By setting up the mounting component and the first seal 40, the battery pack can be easily mounted in the vehicle. The first seal 40 is set around the mounting component, so that once the battery pack needs to be installed in the vehicle, the first seal 40 can seal the gap between the cover 10 and the internal structure of the vehicle. This protects the part of the mounting component that protrudes from the outer surface of the cover 10 from contact with liquids or corrosive substances under harsh operating conditions, thereby preventing the problem of easy aging and failure of this part of the mounting component.

[0072] In addition, in this embodiment, the first seal 40 can be formed of rubber. Of course, the first seal 40 can also be formed of silicone. The specific material of the first seal 40 is not limited in this embodiment.

[0073] In addition, in this embodiment, the first sealing element 40 can be bonded to the cover 10 with adhesive. Of course, the first sealing element 40 can also be disposed on the cover 10 by injection molding. This embodiment does not limit the scope of the application.

[0074] In addition, in some embodiments, the battery cover may also include a metal nest 50, which includes a connecting part 51 and a mounting part 52. The connecting part 51 is connected to the mounting part 52, the mounting part 52 is embedded in the connecting hole 105, the connecting part 51 is connected to the inner surface of the cover body 10, and the mounting part 52 is provided with a through hole 521, through which the hanger is inserted.

[0075] Since the mounting portion 52 is embedded in the connecting hole 105 and the connecting portion 51 is connected to the inner surface of the cover 10, the mounting portion 52 can increase the strength of the cover 10 at the connecting hole 105, and the connecting portion 51 can also increase the strength of the portion of the cover 10 around the connecting hole 105. Because the mounting portion 52 has a through hole 521, the mounting component can pass through the through hole 521 and connect structurally with the battery pack, so that the mounting portion 52 does not affect the structural connection between the mounting component and the battery pack. In other words, by providing the metal nest 50, the strength of the cover 10 can be increased on the one hand, and the structural connection between the mounting component and the battery pack can be ensured on the other hand, facilitating the subsequent installation of the battery pack in the vehicle.

[0076] It should be noted that the metal nest 50 can be made of an alloy, or it can be made of steel. The specific material of the metal nest 50 is not limited in this embodiment.

[0077] In some embodiments, the battery cover may also include a second seal 60; a sealing groove is provided at one end of the mounting portion 52 away from the connecting portion 51, the sealing groove extends along the circumferential direction of the mounting portion 52, and the second seal 60 is disposed in the sealing groove; the mounting member includes a connecting rod and a connecting boss 002 disposed on the connecting rod, the connecting boss 002 extends along the circumferential direction of the connecting rod, the connecting boss 002 is located in the middle of the connecting rod, a portion of the connecting rod located on one side of the connecting boss 002 passes through the through hole 521, and a portion of the connecting rod located on the other side of the connecting boss 002 is used to connect the internal structure of the vehicle, the connecting boss 002 contacts the end of the mounting portion 52 away from the connecting portion 51, and the connecting boss 002 abuts against the second seal 60.

[0078] Because a sealing groove is provided at the end of the mounting part 52 opposite to the connecting part 51, and the sealing groove extends along the circumferential direction of the mounting part 52, and the second sealing member 60 is disposed in the sealing groove, when the mounting member is inserted through the through hole 521 on the mounting part 52, a portion of the connecting rod located on one side of the connecting boss 002 can pass through the through hole 521 and connect to the structure of the battery pack. At this time, the connecting boss 002 can contact the end of the mounting part 52 opposite to the connecting part 51, and at the same time, the connecting boss 002 contacts the second sealing member 60. Thus, the second sealing member 60 can effectively seal the gap between the connecting boss 002 and the end of the mounting part 52 opposite to the connecting part 51, effectively preventing impurities or liquids from the outside of the battery pack from entering the battery pack through the gap and causing damage to the internal components of the battery pack. In addition, when it is necessary to connect the battery pack to the internal structure of the vehicle, a portion of the connecting rod located on the other side of the connecting boss 002 extends out of the battery pack, thereby connecting this portion of the connecting rod to the internal structure of the vehicle, realizing the connection between the battery pack and the internal structure of the vehicle. By setting the second seal 60, the internal components of the battery pack can be effectively protected, preventing them from being affected by impurities or liquids from the outside of the battery pack. When the battery pack is installed in a vehicle, the second seal 60, in addition to the first seal 40, is equivalent to a secondary seal for the battery pack, effectively ensuring the good performance of the battery pack.

[0079] It should be noted that the second seal 60 can be formed of rubber, or it can be formed of silicone. The specific material of the second seal 60 is not limited in this embodiment.

[0080] In some embodiments, the connecting part 51 is connected to the inner surface of the cover 10 by structural adhesive 003, and the mounting part 52 is interference-fitted with the connecting hole 105. With this arrangement, the mounting part 52 is less likely to detach from the connecting hole 105, and the connection part 51 is bonded by structural adhesive 003, which also avoids the problem of the connecting part 51 easily separating from the cover 10. Furthermore, by using structural adhesive 003, it is also convenient to connect the connecting part 51 to the cover 10.

[0081] It should be noted that in the embodiments of this application, the mounting part 52 can be a cylindrical structure, and the connecting part 51 can be a plate-shaped structure.

[0082] In some embodiments, the battery cover may also include an insulating sheet 70; a boss 511 is provided on the surface of the connecting portion 51 away from the mounting portion 52, and a through hole 521 extends to and passes through the boss 511; a through hole is provided on the insulating sheet 70, and the through hole passes through the insulating sheet 70; the insulating sheet 70 is connected to the surface of the connecting portion 51 away from the mounting portion 52, and the boss 511 passes through the through hole.

[0083] Since the connecting portion 51 has a boss 511 on its surface facing away from the mounting portion 52, the boss 511 is smaller in size than the connecting portion 51. This makes it easier to make the surface of the boss 511 facing away from the connecting portion 51 flat. Once the boss 511 abuts against the end of the metal nest 50, it can ensure that the boss 511 abuts against the battery pack structure relatively smoothly. For example, it can ensure that the boss 511 abuts against the longitudinal beam 2000 of the battery pack relatively smoothly. In addition, the through hole 521 on the mounting portion 52 extends to and passes through the boss 511, thereby preventing the boss 511 from affecting the mounting member and ensuring the connection between the mounting member and the metal nest 50. In addition, battery packs typically contain cell modules located within the housing. These modules have electrodes. By incorporating an insulating sheet 70 connected to the surface of the connecting portion 51 facing away from the mounting portion 52, and with a protrusion 511 passing through a through hole, the electrical energy from the cell module, which could potentially leak from the connecting portion 51, can be effectively prevented from being transferred to the connecting portion 51 and subsequently to the cover 10 and mounting components, thus compromising the safety of the vehicle occupants. Furthermore, the insulating sheet 70 also provides thermal runaway protection around the metal nest 50, enhancing the safety of the battery pack.

[0084] It should be noted that, in this embodiment, the insulating sheet 70 can be made of ceramic silicone rubber. Of course, the insulating sheet 70 can also be made of other non-conductive materials, such as ceramic composite tape or mica paper. The specific material of the insulating sheet 70 is not limited in this embodiment.

[0085] In some embodiments, the cover 10 includes a first region 1001 and a second region 1002 connected together, with a connection hole 105 disposed in the first region 1001. The thickness of the first region 1001 is greater than the thickness of the second region 1002. This arrangement effectively increases the thickness of the portion of the cover 10 where the connection hole 105 is located, thus locally thickening the cover 10. This enhances the strength of the portion of the cover 10 where the connection hole 105 is located, thereby improving the strength of the cover 10 at the mounting point. This benefits the stability of the battery pack when it is connected to the internal structure of the vehicle via the mounting point.

[0086] Additionally, in some embodiments, the battery cover further includes an upper buffer assembly 80, which is disposed on the outer surface of the cover 10. With this arrangement, when the battery cover is installed in the battery pack and the battery pack is installed in the vehicle, the upper buffer assembly 80 is located on the outer surface of the cover 10, so that the upper buffer assembly 80 can play a buffering role when the battery pack is impacted by the internal structure of the vehicle, thereby protecting the battery pack.

[0087] It should be noted that the upper buffer assembly 80 may be buffer foam. Certainly, the upper buffer assembly 80 may also be made of other materials with a buffering function, for example, the upper buffer assembly 80 is rubber or silica gel. This is not limited in the embodiments of the present application herein.

[0088] In addition, in some embodiments, the battery cover further includes a lower buffer assembly 90, and the lower buffer assembly 90 is disposed on an inner surface of the cover body 10. With this arrangement, when the battery cover is installed in a battery pack, once an internal structure of the battery pack may impact the cover body 10, the lower buffer assembly 90 can provide a buffering effect, effectively protecting the battery cover.

[0089] It should be noted that the lower buffer assembly 90 may be buffer foam. Certainly, the lower buffer assembly 90 may also be made of other materials with a buffering function, for example, the upper buffer assembly 80 is rubber or silica gel. This is not limited in the embodiments of the present application herein.

[0090] In addition, in the embodiments of the present application, when a fireproof layer 11 is disposed on an inner surface of the cover body 10 and the battery cover includes an insulating sheet 70, the insulating sheet 70 may partially overlap the fireproof layer 11, and an overlap amount L1 of the overlap between the insulating sheet 70 and the fireproof layer 11 satisfies: 3 < L1 < 30 mm. With this arrangement, a sufficient overlap amount can be obtained, ensuring that a weak point of thermal runaway protection does not form between the fireproof layer 11 and the insulating sheet 70.

[0091] In addition, in the embodiments of the present application, when the battery cover includes an insulating sheet 70 and a metal nest 50, and the metal nest 50 includes a connecting portion 51, the insulating sheet 70 partially overlaps the connecting portion 51, and an overlap amount L2 of the overlap between the insulating sheet 70 and the connecting portion 51 satisfies 3 < L2 < 20 mm. With this arrangement, a sufficient overlap amount can be obtained between the insulating sheet 70 and the connecting portion 51, so that the insulating sheet 70 can be effectively adhered to the connecting portion 51 and form effective protection.

[0092] In addition, in the embodiments of the present application, when a fireproof layer 11 is disposed on an inner surface of the cover body 10, the battery cover includes a metal nest 50, and the metal nest 50 includes a connecting portion 51, a distance L3 between the fireproof layer 11 and an edge of the connecting portion 51 can satisfy: L3 > 2 mm. With this arrangement, a sufficient safety distance can be reserved, preventing the fireproof layer 11 from overlapping the metal nest 50 due to the influence of dimensional errors, which would adversely affect the metal nest 50.

[0093] In addition, in the embodiments of the present application, a thickness T1 of a second region 1002 of the cover body 10 can satisfy: 0.8 < T1 < 3 mm.

[0094] In addition, in the embodiments of the present application, the thickness of the fire-resistant layer 11 can be T2, and the relationship between the thickness of the fire-resistant layer 11 and the thickness T1 of the second region 1002 of the cover body 10 can satisfy: 0.5 < T1 / T2 < 6. Such arrangement can ensure that the thickness of the fire-resistant layer 11 is sufficient, thereby ensuring the fire resistance performance of the battery cover.

[0095] In addition, in the embodiments of the present application, the thickness of the insulating sheet 70 can be T3, and the relationship between the thickness of the insulating sheet 70 and the thickness T1 of the second region 1002 of the cover body 10 can satisfy: 0.5 < T1 / T3 < 6. Such arrangement can ensure that the thickness of the insulating sheet 70 is sufficient, thereby improving the safety of the battery pack.

[0096] In addition, in the embodiments of the present application, when the battery cover includes the metal nest 50 and the fire-resistant layer 11 is disposed on the cover body 10, the metal nest 50 includes a connecting portion 51, the thickness of the connecting portion 51 can be T4, the thickness of the fire-resistant layer 11 can be T2, satisfying 0.5 < T4 / T2 < 6.

[0097] In addition, in the embodiments of the present application, the thickness of the second region 1002 of the cover body 10 can be T1, and the thickness of the first region 1001 of the cover body 10 can be T5, satisfying: 1 ≤ T5 / T1 < 6.

[0098] When the battery cover includes the metal nest 50, and the metal nest 50 includes a connecting portion 51 and a mounting portion 52, the thickness of the connecting portion 51 can be T4, and the thickness of the mounting portion 52 can be T6, satisfying 1 < T6 / T4 < 4.

[0099] An embodiment of the present application provides a battery pack, which includes a housing and the battery cover according to any one of the above embodiments; the housing has an opening, and the battery cover covers the opening.

[0100] Wherein, a cell module can be disposed in the housing, and a cross beam and a longitudinal beam 2000 are disposed in the housing, and a mounting member on the battery cover can be connected to the cross beam or the longitudinal beam 2000.

[0101] An embodiment of the present application provides a vehicle, which includes a vehicle body and the battery pack according to the above embodiment; the battery pack is mounted on the vehicle body.

[0102] It should be noted that the types of vehicles include but are not limited to plug-in hybrid vehicles, range-extended vehicles and pure electric vehicles.

[0103] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0104] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cover, the battery cover comprising: Cover; The cover includes an adjacent first side and a second side, the first side is connected to a first sidewall, and the plane of the first sidewall intersects with the plane of the cover. A connecting sidewall is provided, which connects the second side and the end of the first sidewall near the second side.

2. The battery cover according to claim 1, wherein, The cover includes two first side edges arranged opposite each other along a first direction. The two first side edges are respectively connected to two first side walls. The two first side walls protrude from the same side of the cover, and the two first side walls extend in the same direction.

3. The battery cover according to claim 2, wherein, The cover includes two second sidewalls arranged opposite each other along a second direction. The two ends of the first sidewall are respectively connected to the adjacent second sidewalls through the connecting sidewalls. The first direction intersects with the second direction.

4. The battery cover according to claim 2 or 3, wherein, The planes containing the two first sidewalls are perpendicular to the plane containing the cover, and the two first sidewalls have the same extension height.

5. The battery cover according to any one of claims 1-4, wherein, The connecting sidewall is configured as a curved surface.

6. The battery cover according to claim 5, wherein, The curved surface protrudes from the end opposite to the first sidewall.

7. The battery cover according to claim 5 or 6, wherein, Along the direction from the end of the first sidewall to the second side adjacent to the first sidewall, the length of the connecting sidewall of the curved surface gradually decreases.

8. The battery cover according to any one of claims 1-7, wherein, The cover has an inner surface, and a fireproof layer is provided on the inner surface. The fireproof layer and the cover are an integral structure.

9. The battery cover according to any one of claims 1-8, wherein, The cover has an outer surface and an inner surface, the outer surface and the inner surface are arranged opposite to each other in a third direction, and a first reinforcing rib is provided on the outer surface, wherein the third direction intersects with both a first direction and a second direction.

10. The battery cover according to claim 9, wherein, The number of the first reinforcing ribs is multiple, and some of the first reinforcing ribs extend along the first direction, while other parts of the first reinforcing ribs extend along the second direction.

11. The battery cover according to any one of claims 1-10, wherein, The outer surface of the cover is provided with a plurality of second reinforcing ribs near the first sidewall, and the outer surface of the first sidewall is provided with a plurality of third reinforcing ribs. The second reinforcing member is connected to the third reinforcing ribs, and the plurality of third reinforcing ribs are spaced apart.

12. The battery cover according to any one of claims 1-11, wherein, The battery cover also includes a first seal; The cover is provided with a connection hole, the first sealing member is connected to the outer surface of the cover, and the first sealing member is arranged around the connection hole.

13. The battery cover according to claim 12, wherein, The cover includes a first region and a second region connected together, the connecting hole is disposed in the first region, and the thickness of the first region is greater than the thickness of the second region.

14. The battery cover according to claim 13, wherein, The thickness of the second region is T1, which satisfies: 0.8 <T1<3mm。 15. The battery cover according to claim 13 or 14, wherein, The thickness of the second region is T1, and a fireproof layer with a thickness of T2 is provided on the inner surface of the cover. The difference between T1 and T2 satisfies: 0.5 <T1 / T2<6。 16. The battery cover according to any one of claims 13-15, wherein, The battery cover may further include an insulating sheet with a thickness of T3, and the second region has a thickness of T1, wherein T1 and T3 satisfy the following condition: 0.

5. <T1 / T3<6。 17. The battery cover according to any one of claims 13-16, wherein, The thickness of the second region is T1, and the thickness of the first region is T5, satisfying: 1≤T5 / T1<6.

18. The battery cover according to any one of claims 12-17, wherein, The battery cover may also include a metal nest, which includes a connecting part and a mounting part. The connecting part is connected to the mounting part, the mounting part is embedded in the connecting hole, the connecting part is connected to the inner surface of the cover, and the mounting part is provided with a through hole.

19. The battery cover according to claim 18, wherein, The battery cover may also include a second seal; A sealing groove is provided at one end of the mounting part away from the connecting part, the sealing groove extends along the circumferential direction of the mounting part, and the second sealing element is disposed in the sealing groove; The battery cover may also include a mounting component, which includes a connecting rod and a connecting boss disposed on the connecting rod. The connecting boss extends in the circumferential direction of the connecting rod and is located in the middle of the connecting rod. A portion of the connecting rod located on one side of the connecting boss passes through the through hole, and a portion of the connecting rod located on the other side of the connecting boss is used to connect to the internal structure of the vehicle. The connecting boss contacts the end of the mounting portion opposite to the connecting portion, and the connecting boss abuts against the second sealing member.

20. The battery cover according to claim 18 or 19, wherein, The battery cover may also include an insulating sheet; The connecting part has a boss on the surface away from the mounting part, the through hole extends to the boss and penetrates the boss, the insulating sheet has a through hole that penetrates the insulating sheet, the insulating sheet is connected to the connecting part on the surface away from the mounting part, and the boss passes through the through hole.

21. The battery cover according to any one of claims 13-20, wherein, The inner surface of the cover is provided with a fireproof layer. The battery cover includes an insulating sheet, which partially overlaps with the fireproof layer. The overlap between the insulating sheet and the fireproof layer is L1, satisfying: 3 <L1<30mm。 22. The battery cover according to any one of claims 1-21, wherein, The battery cover includes an insulating sheet and a metal nest. The metal nest includes a connecting portion. The insulating sheet and the connecting portion partially overlap, and the overlap amount is L2, satisfying: 3 <L2<20mm。 23. The battery cover according to any one of claims 1-22, wherein, The inner surface of the cover is provided with a fireproof layer, and the battery cover includes a metal nest, the metal nest includes a connecting part, and the distance between the edge of the fireproof layer and the edge of the connecting part is L3, which satisfies: L3>2mm.

24. The battery cover according to any one of claims 1-23, wherein, The battery cover includes a metal nest, and a fireproof layer is provided on the cover body. The metal nest includes a connecting part with a thickness of T4, and the fireproof layer has a thickness of T2. The difference between T2 and T4 satisfies: 0.5 <T4 / T2<6。 25. The battery cover according to any one of claims 1-24, wherein, The battery cover includes a metal nest, which includes a connecting part and a mounting part. The thickness of the connecting part is T4, and the thickness of the mounting part is T6. T4 and T6 satisfy the following condition: 1 <T6 / T4<4。 26. The battery cover according to any one of claims 1-25, wherein, The battery cover also includes an upper buffer assembly, which is disposed on the outer surface of the cover.

27. The battery cover according to any one of claims 1-26, wherein, The battery cover also includes a lower buffer assembly disposed on the inner surface of the cover.

28. The battery cover according to any one of claims 1-27, wherein, The thickness of the connecting sidewall is greater than or equal to the thickness of the cover.

29. The battery cover according to any one of claims 1-28, wherein, The plane containing the first sidewall is perpendicular to the plane containing the cover.

30. The battery cover according to any one of claims 1-29, wherein, The first sidewall, the connecting sidewall, and the cover are an integral structure.

31. The battery cover according to any one of claims 1-30, wherein, The thickness of the first sidewall is any value between 1 and 2 mm.

32. A battery pack, the battery pack comprising a housing and a battery cover according to any one of claims 1-31; The housing has an opening, and the battery cover closes to the opening.

33. A vehicle comprising a vehicle body and a battery pack as described in claim 32; The battery pack is installed on the vehicle body.

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