Battery box cover, battery pack and vehicle

Abstract

The utility model provides a battery box cover, a battery pack and a vehicle, relates to the technical field of battery packs, and is used for solving the problems that corners of a battery box cover are low in strength and easy to crack, the battery box cover comprises a box cover body and a reinforcing structure, the box cover body comprises a plurality of side plates and a plurality of flange plates, the side plates are sequentially connected end to end, and the flange plates are arranged on the side plates. The side plates are arranged in a surrounding mode to form a containing space, the flange plates are arranged along the peripheral side of the containing space and connected with the side plates, first included angles are formed between the flange plates and the correspondingly-arranged side plates, and flanges are arranged on the edges of the flange plates; and the reinforcing structure at least covers the joint of the two adjacent side plates and is respectively connected with the two corresponding adjacent side plates. According to the battery box cover, the battery pack and the vehicle, the structural strength of the corners of the battery box cover is improved.

Description

Technical Field

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

[0002] As a core component of the battery pack, the battery box cover must meet strength requirements and ensure the battery pack's sealing and waterproofing. Its performance directly affects the safety of the battery pack and the entire vehicle.

[0003] As the main forming process of power battery box, bending the box cover has the advantages of not requiring mold opening and low cost. However, in the existing bent and welded box covers, the corner splicing position is often located at the intersection of three sides of the box cover. During vehicle operation, this position is prone to stress concentration. Especially under vibration conditions or after long-term use, it is easy to cause the corner weld of the box cover to fail and crack, affecting the structural stability and safety of the battery pack.

[0004] Therefore, how to enhance the structural strength at the corners of the battery box cover and improve the safety and reliability of the battery pack is an important technical problem that urgently needs to be solved. Utility Model Content

[0005] This application provides a battery box cover, a battery pack, and a vehicle, which can enhance the structural strength of the corner of the battery box cover and have better stability and safety.

[0006] In a first aspect, this application provides a battery box cover, including: a cover body and a reinforcing structure. The cover body includes multiple side plates and multiple flange plates. The multiple side plates are connected end to end in sequence to form an accommodating space. The multiple flange plates are arranged along the outer periphery of the accommodating space and connected to the side plates. A first included angle is formed between the flange plate and the corresponding side plate. The edge of the flange plate has a flange.

[0007] The reinforced structure covers at least the connection between two adjacent side panels and is connected to the corresponding two adjacent side panels respectively.

[0008] As described above, the battery box cover has a reinforcing structure including a reinforcing plate. The reinforcing plate includes a first sub-reinforcing plate and a second sub-reinforcing plate that are connected to each other. The first sub-reinforcing plate and the second sub-reinforcing plate have a second included angle that matches the first included angle. The reinforcing plate covers the connection between two adjacent side plates, and the first sub-reinforcing plate is attached to one of the corresponding two adjacent side plates, and the second sub-reinforcing plate is attached to the other of the corresponding two adjacent side plates.

[0009] As described above, the reinforcing structure of the battery box cover also includes a pressure plate. The pressure plate includes a first sub-pressure plate and a second sub-pressure plate that are connected to each other. The pressure plate covers the connection between the side plate and the flange plate connected to the side plate. The first sub-pressure plate is connected to the corresponding side plate and the reinforcing plate on the side plate, and the second sub-pressure plate is connected to the corresponding flange plate.

[0010] As described above, the battery box cover also includes a third sub-pressure plate, which is disposed on a flange plate adjacent to the second sub-pressure plate in the circumferential direction and connected to an adjacent reinforcing plate. The third sub-pressure plate is connected to one end of the second sub-pressure plate.

[0011] As mentioned above, the battery box cover also includes a connecting structure. The connecting structure is connected between the second sub-pressure plate and the third sub-pressure plate. The connecting structure is an arc-shaped structure that bends away from the flange plate, and the arc-shaped structure corresponds to the connection position of the two adjacent flange plates.

[0012] As described above, the thickness of the first sub-plate remains consistent from the direction closest to the second sub-reinforcing plate to the direction furthest from the second sub-reinforcing plate.

[0013] As described above, the battery box cover also includes at least one reinforcing rib, which is disposed between the side plate and the flange plate.

[0014] As mentioned above, the connection between the reinforcing plate and the pressure plate of the battery box cover is made by welding.

[0015] Secondly, embodiments of this application provide a battery pack, including a battery housing, a connector, a seal, and the aforementioned battery cover. The battery cover is disposed on the battery housing and connected to the battery housing. The battery cover and the battery housing together enclose a sealed receiving cavity. The battery cover is connected to the battery housing through the connector, and the seal is disposed between the connector and the battery cover and the battery housing.

[0016] Thirdly, embodiments of this application provide a vehicle, including a vehicle body and the aforementioned battery pack, wherein the battery pack is disposed within the vehicle body.

[0017] This application provides a battery box cover, a battery pack, and a vehicle. By providing a small flange on the outer periphery of the cover body, the overall rigidity of the cover body is increased, making it less prone to deformation and preventing the cover body from arcing. By providing a reinforcing structure at the junction of two adjacent side plates and flanges of the cover body, the strength at the corners of the cover body can be improved. Compared with traditional battery box covers, this structure has higher strength, can effectively disperse stress, and is less likely to crack at the corners of the battery box cover. At the same time, considering the balance between improving battery pack performance and reducing weight, by locally reinforcing the weak points of the cover, the overall structural strength is improved without significantly increasing the weight. Attached Figure Description

[0018] Figure 1 This is a diagram showing the connection relationship between the reinforcing structure and the cover body in a battery box cover according to an embodiment of this application.

[0019] Figure 2This is a schematic diagram of the structure of the cover body in a battery box cover provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of a reinforcing structure in a battery box cover provided in an embodiment of this application;

[0021] Figure 4 This is a partial cross-sectional view of a battery pack provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10-Battery box cover;

[0024] 100 - Box cover body; 110 - Side panel; 120 - Flange plate;

[0025] 200 - Reinforcing structure; 210 - Reinforcing plate; 211 - First sub-reinforcing plate; 212 - Second sub-reinforcing plate; 220 - Pressure plate; 221 - First sub-pressure plate; 222 - Second sub-pressure plate; 223 - Third sub-pressure plate; 224 - Connecting structure; 20 - Battery housing; 30 - Connector; 40 - Sealing element. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] As a core component of the battery pack, the battery box cover must meet strength requirements and ensure the battery pack's sealing and waterproofing. Its performance directly affects the safety of the battery pack and the entire vehicle.

[0028] As the main forming process of power battery box, bending the box cover has the advantages of not requiring mold opening and low cost. However, in the existing bent and welded box covers, the corner splicing position is often located at the intersection of three sides of the box cover. During vehicle operation, this position is prone to stress concentration. Especially under vibration conditions or after long-term use, it is easy to cause the corner weld of the box cover to fail and crack, affecting the structural stability and safety of the battery pack.

[0029] Therefore, how to enhance the structural strength at the corners of the battery box cover and improve the safety and reliability of the battery pack is an important technical problem that urgently needs to be solved.

[0030] To address this, this application provides a battery box cover, a battery pack, and a vehicle. By providing a flange plate on the outer periphery of the cover body, the overall rigidity of the cover body is increased, making it less prone to deformation and preventing the cover body from exhibiting reverse curvature. By using a reinforcing structure at the junction of two adjacent side plates of the cover body, the strength at the corners of the cover body can be improved. Compared with traditional battery box covers, this structure has higher strength, can effectively disperse stress, and is less likely to cause cracks at the corners of the battery box cover.

[0031] The following is a further description of one type of battery box cover in this embodiment.

[0032] Figure 1 This is a diagram showing the connection relationship between the reinforcing structure and the cover body in a battery box cover according to an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the cover body in a battery box cover provided in an embodiment of this application; Figure 3 This is a schematic diagram of a reinforcing structure in a battery box cover provided in an embodiment of this application; Figure 4 This is a partial cross-sectional view of a battery pack provided in an embodiment of this application.

[0033] like Figure 1 and Figure 2 As shown, this application embodiment provides a battery box cover 10, including:

[0034] The cover body 100 covers the outside of the battery cell, providing physical protection for the battery cell and preventing external impact, vibration and other mechanical damage. Specifically, in this embodiment, the cover body 100 is made by bending and welding process, which has high strength and rigidity and good sealing performance, and can prevent moisture or dust from entering the cover body 100 and causing damage to the battery cell inside the cover body 100.

[0035] For example, the material of the box cover body 100 can be aluminum alloy or the like. This embodiment does not limit this, as long as it has good durability.

[0036] In this embodiment, in order to balance the strength and ductility of the box cover body 100, the material of the box cover body 100 is described using cold-rolled low-carbon steel as an example, so as to be suitable for application scenarios that require bending.

[0037] Continue to refer to Figure 1 and Figure 2As shown, the box cover body 100 includes multiple side plates 110 and multiple flange plates 120. The multiple side plates 110 are connected end to end to form an accommodating space. The multiple flange plates 120 are arranged along the outer periphery of the accommodating space and connected to the side plates 110. There is a first included angle between the flange plate 120 and the side plate 110 at the corresponding position. The edge of the flange plate 120 has a flange, that is, the edge of the flange plate 120 has a small fold or curl structure to form a flange. In addition, the flange plate 120 is a sealing surface. The flange plate 120 is arranged on the outer periphery of the box cover body 100 to form a sealing surface. At the same time, the edge of the flange plate 120 has a small flange, which can reduce the reverse arc after bending, ensure the flatness of the flange sealing surface, and meet the dustproof and waterproof locking state of the whole package.

[0038] Understandably, by setting a small flange on the edge of the flange plate 120, the overall rigidity of the cover body can be increased, making it less prone to deformation and preventing the cover body from exhibiting a reverse arc phenomenon.

[0039] Specifically, the flange plate 120 and the side plate 110 form an angle of 90 degrees or approximately 90 degrees, which has good structural stability and support capacity. It can effectively disperse and bear the externally applied force, making the cover body 100 more stable and durable during use.

[0040] In addition, in this embodiment, a reinforcing structure 200 is provided at the junction of two adjacent side plates 110 and flange plate 120 of the cover body 100, which can improve the strength of the corner of the cover body 100. Compared with the traditional battery cover, this structure has higher strength, can effectively disperse stress, and is less likely to crack at the corner of the battery cover. At the same time, considering the balance between improving battery pack performance and lightweighting, by locally reinforcing the weak parts of the cover, the overall structural strength is improved without significantly increasing the weight.

[0041] Continue to refer to Figure 1 and Figure 2 As shown, the reinforcing structure 200 is connected to the side plate 110 and flange plate 120 located at the corner of the box cover body 100. Specifically, the reinforcing structure 200 and the box cover body 100 can be connected by welding or by threaded connection. This embodiment does not limit this, as long as the reinforcing structure 200 can be fixedly installed at the corner of the box cover body 100.

[0042] In one feasible implementation, the reinforcing structure 200 includes a reinforcing plate 210, which includes a first sub-reinforcing plate 211 and a second sub-reinforcing plate 212 connected to each other. The first sub-reinforcing plate 211 and the second sub-reinforcing plate 212 have a second included angle that matches the first included angle. The reinforcing plate 210 covers the connection between two adjacent side plates 110, and the first sub-reinforcing plate 211 is attached to one of the corresponding two adjacent side plates 110, and the second sub-reinforcing plate 212 is attached to the other of the corresponding two adjacent side plates 110.

[0043] In this embodiment, reference Figure 3 As shown, the first sub-reinforcing plate 211 extends along a first direction, and the second sub-reinforcing plate 212 extends along a second direction, wherein the first direction is... Figure 3 The "X" direction in the diagram, the second direction is... Figure 3 The purpose of designing the reinforcing plate 210 in an "L" shape, along the "Y" direction, is to wrap around the corners of the lid body 100, thereby enhancing the connection strength at the junction of two adjacent side plates 110 and preventing cracking.

[0044] For example, the materials of the first sub-reinforcing plate 211 and the second sub-reinforcing plate 212 can be steel, aluminum alloy, etc. This embodiment does not limit this. Specifically, in this embodiment, the materials of the first sub-reinforcing plate 211 and the second sub-reinforcing plate 212 are cold-rolled low-carbon steel as an example for illustration.

[0045] In one feasible embodiment, the reinforcing structure 200 further includes a pressure plate 220, which includes a first sub-pressure plate 221 and a second sub-pressure plate 222 connected to each other. The pressure plate 220 covers the connection between the side plate 110 and the flange plate 120 connected to the side plate 110, and the first sub-pressure plate 221 is connected to the corresponding side plate 110 and the reinforcing plate 210 on the side plate 110; the second sub-pressure plate 222 is connected to the corresponding flange plate 120.

[0046] By increasing the thickness of the flange plate 120, the strength and rigidity of the flange plate 120 are improved, thus preventing the cover body 100 from exhibiting a reverse arc phenomenon after bending deformation.

[0047] In this embodiment, we continue to refer to Figure 3 As shown, the first sub-pressure plate 221 and the second sub-reinforcing plate 212 are tightly connected so that the pressure plate 220 and the reinforcing plate 210 together form a reinforcing structure 200, which wraps around the relatively weak corner of the cover body 100. This effectively disperses the force at the corner of the cover body 100 and transfers it to the side plate 110 and flange plate 120 of the cover body 100, thereby strengthening the structural strength at the corner of the battery cover 10, improving the load-bearing capacity of the battery cover 10, and enhancing the safety and reliability of the battery pack.

[0048] Specifically, both the reinforcing plate 210 and the pressure plate 220 are manufactured using a bending process, eliminating the need for mold making and effectively reducing production costs.

[0049] Continue to refer to Figure 3 As shown, the pressure plate 220 can move along... Figure 3 The "X" direction setting can also be used along... Figure 3 The "Y" setting is not limited in this embodiment, as long as the pressure plate 220 can be fixedly mounted on the side plate 110.

[0050] In one possible implementation, the pressure plate 220 further includes a third sub-pressure plate 223, which is disposed on the flange plate 120 adjacent to the second sub-pressure plate 222 in the circumferential direction and connected to the adjacent reinforcing plate 210, and the third sub-pressure plate 223 is connected to one end of the second sub-pressure plate 222.

[0051] In this embodiment, refer to Figure 3 As shown, the second sub-pressure plate 222, the third sub-pressure plate 223, the first sub-reinforcing plate 211, and the second sub-reinforcing plate 212 are bent 90 degrees at the corner of the box cover body 100 to fit the shape of the corner of the box cover body 100.

[0052] For example, the pressure plate 220 can be fixedly connected to the flange plate 120 by bolts, screws, etc., or it can be connected to the flange plate 120 by welding. This embodiment does not limit this and can be selected according to the actual situation.

[0053] In this embodiment, we continue to refer to Figure 3 As shown, the pressure plate 220 is provided with multiple mounting holes, and threaded connectors pass through the mounting holes to fix the pressure plate 220 to the flange plate 120.

[0054] In one feasible implementation, the pressure plate 220 further includes a connecting structure 224, which is connected between the second sub-pressure plate 222 and the third sub-pressure plate 223. The connecting structure 224 is an arc-shaped structure that bends away from the flange plate 120, and the arc-shaped structure corresponds to the connection position of the two adjacent flange plates 120.

[0055] In this embodiment, two adjacent flange plates 120 are connected by welding. Therefore, a weld seam is formed at the junction of two adjacent flange plates 120. To avoid direct contact between the weld seam and the pressure plate 220, thereby affecting the mechanical strength of the pressure plate 220, this embodiment refers to... Figure 3As shown, an arc-shaped structure is provided on the pressure plate 220 to avoid the weld seam and reduce the interference of the pressure plate 220 on the weld seam. Furthermore, the purpose of providing an arc-shaped structure on the pressure plate 220 is to ensure a tight connection between the pressure plate 220 and the flange plate 120, resulting in better connection stability.

[0056] In some embodiments, the thickness of the first sub-pressure plate 221 is consistent from the direction closest to to the second sub-reinforcing plate 212, thus ensuring the strength of the first sub-pressure plate.

[0057] Specifically, computer simulation software can be used to perform topology optimization on the structure of the first sub-pressure plate 221 to keep its dimensions within a reasonable range. It is understood that the thickness of the first sub-pressure plate 221 can be selected based on actual conditions, and this embodiment does not impose any limitations on it.

[0058] In one feasible implementation, the reinforcing structure 200 further includes at least one reinforcing rib (not shown in the figure), which is disposed between the side plate 110 and the flange plate 120. This design, by providing reinforcing ribs at the corners of the cover body 100, effectively increases the strength at the corners of the cover body 100, preventing cracking. Furthermore, it is lightweight, adding minimal extra weight, thus improving the energy density of the battery pack and increasing the vehicle's range.

[0059] The number of reinforcing ribs can be one or more. This embodiment does not limit this, as long as they can play a role in strengthening and fixing. The specific number of reinforcing ribs can be selected according to the actual situation.

[0060] In one feasible implementation, the connection between the reinforcing plate 210 and the pressure plate 220 is made by welding.

[0061] Specifically, when fixing the reinforcing plate 210 and the pressure plate 220, firstly, the reinforcing plate 210 and the pressure plate 220 are welded to the outer wall of the cover body 100. Then, the reinforcing plate 210 and the pressure plate 220 are connected by welding at the joint so that the reinforcing plate 210 and the pressure plate 220 are connected to the cover body 100 as one unit, which facilitates the subsequent maintenance of the battery pack.

[0062] This embodiment provides a battery box cover 10, including: a cover body 100, including multiple side plates 110 and multiple flange plates 120, the multiple side plates 110 being connected end to end in sequence to form an accommodating space, the multiple flange plates 120 being disposed along the outer periphery of the accommodating space and connected to the side plates 110, and the flange plates 120 and the corresponding side plates 110 having a first included angle; and a reinforcing structure 200, which at least covers the connection between two adjacent side plates 110 and is respectively connected to the corresponding two adjacent side plates 110. By setting a flange plate 120 on the outer periphery of the cover body 100 to form a flange sealing surface, and setting a small flange on the edge of the flange plate 120, the reverse arc after bending can be reduced, ensuring the flatness of the sealing surface of the cover body 100 and meeting the requirements of the whole package dustproof and waterproof locking state. By setting a reinforcing structure 200 at the junction of two adjacent side plates 110 of the cover body 100, the strength of the corner of the cover body 100 can be improved. Compared with the traditional battery box cover, this structure has higher strength, can effectively disperse stress, and is less likely to crack at the corner of the battery box cover.

[0063] The battery pack in the embodiments of this application will be described below.

[0064] This embodiment also provides a battery pack, including a battery housing 20, a connector 30, a seal 40, and the aforementioned battery housing cover 10. The battery housing cover 10 is disposed on and connected to the battery housing 20. The battery housing cover 10 and the battery housing 20 together form a sealed receiving cavity. The battery housing cover 10 is connected to the battery housing 20 via the connector 30. The seal 40 is disposed between the connector 30 and the battery housing cover 10 and the battery housing 20. (Refer to...) Figure 4 As shown, by setting a seal 40 between the battery box cover 10 and the battery box body 20, a good sealing effect can be achieved, preventing external impurities from entering the battery pack and thus damaging the battery cells inside the battery pack.

[0065] For example, the sealing element 40 can be a sealing ring, sealing strip, etc. This embodiment does not limit this, as long as it can play a sealing role.

[0066] The battery box cover 10 and the battery box body 20 are provided with through holes, and the connector 30 passes through the through holes to connect the battery box cover 10 and the battery box body 20. Specifically, the type of connector 30 can be bolts, screws, etc. In this embodiment, the type of connector 30 is not limited, as long as it can play a fixing role.

[0067] The specific structure, function and working principle of the battery box cover 10 have been described in detail in the foregoing embodiments, and will not be repeated here.

[0068] Specifically, the battery pack also includes battery cells and a cover. The battery cells are stacked inside the battery housing 20, and the battery housing cover 10 is placed on the upper surface of the cell module. Fasteners are used to connect the cover to the housing body 100 to provide protection.

[0069] This embodiment also provides a vehicle, including a vehicle body and the aforementioned battery pack, wherein the battery pack is disposed within the vehicle body.

[0070] For example, the battery pack type can be a lithium-ion battery pack, a nickel-metal hydride battery pack, a lead-acid battery pack, or a solid-state battery pack; this embodiment does not limit this.

[0071] Specifically, the battery pack is fixedly connected to the vehicle frame using welding technology or threaded connection. In this embodiment, there are no restrictions on the connection method between the battery pack and the vehicle body, as long as the battery pack can be fixed to the vehicle body.

[0072] The types of vehicles include, but are not limited to, electric vehicles, hybrid vehicles, electric trucks, and electric vans.

[0073] In summary, this application provides a battery box cover, a battery pack, and a vehicle. By providing a small flange on the outer periphery of the cover body, the overall rigidity of the cover body is increased, making it less prone to deformation and preventing the cover body from arcing. By using a reinforcing structure at the junction of two adjacent side plates and flanges of the cover body, the strength at the corners of the cover body can be improved. Compared with traditional battery box covers, this structure has higher strength, can effectively disperse stress, and is less likely to crack at the corners of the battery box cover. At the same time, considering the balance between improving battery pack performance and reducing weight, by locally reinforcing the weak points of the cover, the overall structural strength is improved without significantly increasing the weight.

[0074] The terms "first," "second," etc., used in the embodiments of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0075] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0076] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0077] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0078] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "one" can be understood to convey either singular or plural usage.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery box cover, characterized in that, include: The box cover body (100) includes multiple side plates (110) and multiple flange plates (120). The multiple side plates (110) are connected end to end in sequence to form an accommodating space. The multiple flange plates (120) are arranged along the outer periphery of the accommodating space and connected to the side plates (110). The flange plates (120) and the side plates (110) at the corresponding positions have a first included angle. The edges of the flange plates (120) have flanges. The reinforcing structure (200) covers at least the connection between two adjacent side plates (110) and is connected to the corresponding two adjacent side plates (110) respectively.

2. The battery box cover according to claim 1, characterized in that, The reinforcing structure (200) includes a reinforcing plate (210), which includes a first sub-reinforcing plate (211) and a second sub-reinforcing plate (212) connected to each other. The first sub-reinforcing plate (211) and the second sub-reinforcing plate (212) have a second included angle that matches the first included angle. The reinforcing plate (210) covers the connection between two adjacent side plates (110), and the first sub-reinforcing plate (211) is attached to one of the corresponding two adjacent side plates (110), and the second sub-reinforcing plate (212) is attached to the other of the corresponding two adjacent side plates (110).

3. The battery box cover according to claim 2, characterized in that, The reinforcing structure (200) further includes a pressure plate (220), which includes a first sub-pressure plate (221) and a second sub-pressure plate (222) connected to each other. The pressure plate (220) covers the connection between the side plate (110) and the flange plate (120) connected to the side plate (110). The first sub-pressure plate (221) is connected to the corresponding side plate (110) and the reinforcing plate (210) on the side plate (110). The second sub-pressure plate (222) is connected to the corresponding flange plate (120).

4. The battery box cover according to claim 3, characterized in that, The pressure plate (220) further includes a third sub-pressure plate (223), which is disposed on the flange plate (120) adjacent to the second sub-pressure plate (222) in the circumferential direction and connected to the adjacent reinforcing plate (210), and the third sub-pressure plate (223) is connected to one end of the second sub-pressure plate (222).

5. The battery box cover according to claim 4, characterized in that, The pressure plate (220) further includes a connecting structure (224), which is connected between the second sub-pressure plate (222) and the third sub-pressure plate (223). The connecting structure (224) is an arc-shaped structure that bends away from the flange plate (120), and the arc-shaped structure corresponds to the connection position of the two adjacent flange plates (120).

6. The battery box cover according to claim 3, characterized in that, The thickness of the first sub-pressure plate (221) is consistent from the direction of approaching to moving away from the second sub-reinforcing plate (212).

7. The battery box cover according to any one of claims 3-6, characterized in that, The reinforcing structure (200) further includes at least one reinforcing rib, which is disposed between the side plate (110) and the flange plate (120).

8. The battery box cover according to claim 4, characterized in that, The connection between the reinforcing plate (210) and the pressure plate (220) is made by welding.

9. A battery pack, characterized in that, The device includes a battery housing (20), a connector (30), a seal (40), and a battery cover (10) as described in any one of claims 1-8. The battery cover (10) is disposed on the battery housing (20) and connected to the battery housing (20). The battery cover (10) and the battery housing (20) together form a sealed receiving cavity. The battery cover (10) is connected to the battery housing (20) through the connector (30). The seal (40) is disposed between the connector (30) and the battery cover (10) and the battery housing (20).

10. A vehicle, characterized in that, It includes a vehicle body and the battery pack of claim 9, wherein the battery pack is disposed within the vehicle body.

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