Battery upper cover, battery pack and vehicle

Abstract

The utility model discloses a battery upper cover, a battery pack and a vehicle, the battery upper cover comprises a liquid cooling plate, the upper side wall of the liquid cooling plate is provided with a first concave part and a first convex part, and a liquid flow channel of the liquid cooling plate is formed in the first convex part; the mounting structure comprises a liquid cooling plate connecting part, the lower side wall of the liquid cooling plate connecting part is provided with a second concave part and a second convex part, the first convex part and the second concave part are matched and connected with each other, and the second convex part and the first concave part are matched and connected with each other. In the embodiment, the lower side wall of the liquid cooling plate connecting part is designed according to the upper side wall of the liquid cooling plate, so that the first convex part is matched with the second concave part, the first convex part is connected with the second concave part to form a first connecting surface, the second convex part is matched with the first concave part, and the second convex part is connected with the first concave part to form a second connecting surface; the connecting area of the mounting structure and the liquid cooling plate is increased, the connecting strength is improved, the reliable connection of the mounting structure and the liquid cooling plate is ensured, the liquid flow channel does not need to avoid the mounting structure, and the heat exchange of the battery cell is uniform.

Description

Technical Field

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

[0002] With the development of new energy vehicles, users are placing higher demands on driving range. In order to improve the integration efficiency of batteries, the existing technology adopts a technical solution of inverting the battery cells and integrating the battery cover plate and liquid cooling plate together to form an integral liquid-cooled cover plate, which is then connected to the vehicle body through a vehicle body connection structure.

[0003] In one type of liquid-cooled top cover, the liquid flow channels are only distributed in a part of the liquid-cooled top cover to avoid the vehicle body connection structure. However, the areas where liquid flow channels are not set will have heat exchange dead zones, resulting in uneven heat exchange of local cells and a decrease in the thermal management performance of the battery.

[0004] In another type of liquid-cooled cover in related technologies, the liquid flow channels are distributed throughout the entire plane of the liquid-cooled cover, and the upper wall of the liquid-cooled cover has a wavy structure. The connection area between the vehicle body connection structure and the liquid-cooled cover is limited, resulting in insufficient connection between the battery pack and the vehicle body and reduced mechanical safety. Utility Model Content

[0005] The purpose of this application is to provide a battery cover, a battery pack, and a vehicle that ensures uniform heat exchange between the battery cells and reliable mounting of the battery pack.

[0006] To solve the above-mentioned technical problems, this application provides a battery cover, comprising:

[0007] A liquid cooling plate, wherein the upper sidewall of the liquid cooling plate has a first recess and a first protrusion spaced apart, and the interior of the first protrusion forms a liquid flow channel of the liquid cooling plate;

[0008] The mounting structure includes a liquid cooling plate connecting part. The lower sidewall of the liquid cooling plate connecting part has a second recess and a second protrusion spaced apart. The first protrusion and the second recess are adapted to each other and connected to each other. The second protrusion and the first recess are adapted to each other and connected to each other.

[0009] In this embodiment, the structure of the lower sidewall of the liquid cooling plate connecting part in the battery cover is designed to conform to the structure of the upper sidewall of the liquid cooling plate, so that the first convex part and the second concave part are adapted to each other and connected to each other. A first connecting surface is formed between the first convex part and the second concave part, and a second connecting surface is formed between the second convex part and the first concave part. This increases the connection area between the mounting structure and the liquid cooling plate, improves the connection strength between the mounting structure and the liquid cooling plate, and ensures the reliable connection between the mounting structure and the liquid cooling plate. This, in turn, ensures a sufficient connection between the battery pack and the vehicle body, guarantees the reliable mounting of the battery pack, and improves the mechanical safety performance of the battery pack. At the same time, the liquid flow channel of the liquid cooling plate is formed inside the first convex part. The second concave part on the lower sidewall of the liquid cooling plate connecting part serves to avoid the first convex part. That is, the first concave part serves to avoid the liquid flow channel. There is no need for the liquid flow channel to avoid the mounting structure. The liquid flow channel can be distributed in the entire plane of the liquid cooling plate, avoiding heat exchange dead zones, making the cell heat exchange uniform, and ensuring the thermal management performance of the battery.

[0010] Optionally, the upper sidewall of the liquid cooling plate connection has an integrally formed protrusion, and the mounting structure further includes a vehicle body connection, which is mechanically connected to the protrusion.

[0011] Optionally, the vehicle body connecting portion includes a threaded connecting hole disposed on the protrusion, wherein the upper end of the threaded connecting hole is an open end.

[0012] Optionally, the vehicle body connection includes a threaded connector, the head of which is embedded inside the convex bulge, and the rod of which extends upward.

[0013] Optionally, the shank of the threaded connector includes a non-threaded section and a threaded section, the non-threaded section being close to the head of the threaded connector, the non-threaded section being at least partially embedded inside the convex bulge, and the threaded section being exposed outside the convex bulge.

[0014] Optionally, the distance between the upper end face of the head of the threaded connector and the upper end face of the convex bulge is d1, and the value range of d1 is: d1≥3mm.

[0015] Optionally, the angle between the skirt of the convex bulge and the upper sidewall of the liquid cooling plate connection is α, and the value of α is in the range of: α≥120°;

[0016] The distance between the upper end face of the convex bulge and the upper side wall of the liquid cooling plate connection part is d2, and the width of the liquid cooling plate connection part is d3. The relationship between the two satisfies: d2≥0.1d3.

[0017] Optionally, the distance between the upper side wall of the liquid cooling plate connection and the closed end wall of the second recess is d4, and the value of d4 is in the range of 2mm≤d2≤5mm.

[0018] Optionally, the battery cover includes a plurality of mounting components, which are spaced apart along the length of the liquid cooling plate. Each mounting component includes a plurality of mounting structures, which are spaced apart along the width of the liquid cooling plate.

[0019] This embodiment also provides a battery pack, including the aforementioned battery cover.

[0020] The battery pack in this embodiment includes the aforementioned battery cover, and therefore has the same technical effect as the aforementioned battery cover, which will not be described again here.

[0021] This embodiment also provides a vehicle including the aforementioned battery pack.

[0022] The vehicle in this embodiment includes the aforementioned battery pack, and therefore has the same technical effects as the aforementioned battery pack, which will not be described again here. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a first specific embodiment of the battery cover provided in this application;

[0024] Figure 2 for Figure 1 A partial top view of the battery cover;

[0025] Figure 3 for Figure 2 Sectional view along the AA direction;

[0026] Figure 4 for Figure 1 A partial structural diagram of the liquid cooling plate in the battery cover;

[0027] Figure 5 A cross-sectional view along the height direction of the second specific embodiment of the battery cover provided in this application;

[0028] Figure 6 This is a schematic diagram of the mounting component in a second specific embodiment of the battery cover provided in this application;

[0029] in, Figures 1-6 The accompanying figure labels are as follows:

[0030] 1-Liquid cooling plate; 1A-First recess; 1B-First protrusion; 11-Support flow channel plate; 12-Stamped flow channel plate; 12a-Recess;

[0031] 2- Mounting structure; 2A- Second recess; 2B- Second protrusion; 21- Liquid cooling plate connection; 22- Protrusion; 22a- Threaded connection hole; 23- Threaded connector; 231- Head; 232- Rod; 2321- Threaded section; 2322- Non-threaded section;

[0032] A - First connecting surface; B - Second connecting surface. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In this article, "multiple" usually refers to two or more.

[0035] In this article, the "up and down" orientation is used as... Figure 3 and Figure 5 Taking the perspective of the vehicle as an example, when the battery cover is connected to the vehicle body, the end closer to the vehicle body is "upper" and the end farther away from the vehicle body is "lower".

[0036] Please refer to Figure 1-Figure 4 , Figure 1 A schematic diagram of the structure of a first specific embodiment of the battery cover provided in this application; Figure 2 for Figure 1 A partial top view of the battery cover; Figure 3 for Figure 2 Sectional view along the AA direction; Figure 4 for Figure 1 A partial structural diagram of the liquid cooling plate in the battery cover.

[0037] This embodiment provides a battery cover, including:

[0038] The liquid cooling plate 1 has a first recess 1A and a first protrusion 1B spaced apart on its upper sidewall. The interior of the first protrusion 1B forms a liquid flow channel for the liquid cooling plate 1.

[0039] Mounting structure 2 includes a liquid cooling plate connecting part 21. The lower side wall of the liquid cooling plate connecting part 21 has a second recess 2A and a second protrusion 2B spaced apart. The first protrusion 1B and the second recess 2A are adapted to each other and connected to each other. The second protrusion 2B and the first recess 1A are adapted to each other and connected to each other.

[0040] In this embodiment, the structure of the lower sidewall of the liquid cooling plate connecting part 21 in the battery cover is designed to conform to the structure of the upper sidewall of the liquid cooling plate 1, so that the first protrusion 1B and the second concave part 2A are adapted to each other and connected to each other, forming a first connecting surface A between the first protrusion 1B and the second concave part 2A. The second protrusion 2B and the first concave part 1A are adapted to each other and connected to each other, forming a second connecting surface B between the second protrusion 2B and the first concave part 1A. This increases the connection area between the mounting structure 2 and the liquid cooling plate 1, improves the connection strength between the mounting structure 2 and the liquid cooling plate 1, and ensures the connection between the mounting structure 2 and the liquid cooling plate 1. The connection is reliable, which in turn ensures a sufficient connection between the battery pack and the vehicle body, guaranteeing reliable mounting of the battery pack and improving the mechanical safety performance of the battery pack. At the same time, the interior of the first protrusion 1B forms a liquid flow channel for the liquid cooling plate 1. The lower side wall of the liquid cooling plate connecting part 21 is provided with a second recess 2A to avoid the first protrusion 1B. That is, the first recess 1A avoids the liquid flow channel, so there is no need for the liquid flow channel to avoid the mounting structure 2. The liquid flow channel can be distributed in the entire plane of the liquid cooling plate 1, avoiding heat exchange dead zones, making the cell heat exchange uniform, and ensuring the thermal management performance of the battery.

[0041] like Figure 3 As shown, in this embodiment, the bottom wall of the first protrusion 1B and the closed bottom wall of the second recess 2A are attached to each other and connected to form a first connecting surface A, with a gap between the side walls of the first protrusion 1B and the second recess 2A. Similarly, the bottom wall of the second protrusion 2B and the closed bottom wall of the first recess 1A are attached to each other and connected to form a second connecting surface B, with a gap between the side walls of the second protrusion 2B and the first recess 1A. This gap provides a tolerance space, ensuring that during assembly, the first protrusion 1B can be smoothly installed inside the second recess 2A, and the bottom walls of the first protrusion 1B and the second recess 2A can be reliably fitted together. This avoids assembly problems due to processing errors, reduces the processing difficulty of the liquid cooling plate 1 and the mounting structure 2, and improves the molding efficiency of the battery cover in this embodiment.

[0042] Of course, in practice, as long as the first protrusion 1B can be connected to the interior of the second recess 2A, at least the bottom wall of the first protrusion 1B and the closed bottom wall of the second recess 2A can be attached to each other and connected. In other embodiments of this application, the outer contour of the first protrusion 1B and the inner contour of the second recess 2A match each other. When the first protrusion 1B is connected to the interior of the second recess 2A, the opposite walls of the first protrusion 1B and the second recess 2A are attached to each other.

[0043] Similarly, in practice, as long as the second protrusion 2B can be connected to the inside of the first recess 1A, at least the bottom wall of the second protrusion 2B and the closed bottom wall of the first recess 1A are attached to each other and connected. In other embodiments of this application, the outer contour of the second protrusion 2B matches the inner contour of the first recess 1A. When the second protrusion 2B is connected to the inside of the first recess 1A, the opposite walls of the second protrusion 2B and the first recess 1A are correspondingly attached.

[0044] like Figure 3 As shown, in this embodiment, the liquid cooling plate 1 includes a supporting flow channel plate 11 and a stamped flow channel plate 12. The supporting flow channel plate 11 has a flat plate structure, and the stamped flow channel plate 12 forms a recess 12a by stamping. It can be seen that the recess 12a is formed inside the first protrusion 1B. After the stamped flow channel plate 12 and the supporting flow channel plate 11 are connected to each other, the stamped flow channel plate 12 is located above the supporting flow channel plate 11. The recess 12a forms a liquid flow channel for the coolant to flow through.

[0045] The stamped flow channel plate 12 and the supporting flow channel plate 11 can be fixed by welding process, which specifically includes brazing process, etc.

[0046] Furthermore, in some embodiments of this application, the first protrusion 1B and the second concave portion 2A are bonded and fixed together, and the second protrusion 2B and the first concave portion 1A are bonded and fixed together. For example, the first protrusion 1B and the second concave portion 2A can be bonded and fixed together with structural adhesive, and the second protrusion 2B and the first concave portion 1A can be bonded and fixed together with structural adhesive. Structural adhesive has the advantages of fast curing speed and high bonding strength, which can stably connect the mounting structure 2 to the liquid cooling plate 1.

[0047] In other embodiments of this application, the first protrusion 1B and the second recess 2A are welded together. The welding process includes laser welding, brazing, etc., to ensure reliable connection between the mounting structure 2 and the liquid cooling plate 1.

[0048] When the stamped flow channel plate 12 and the supporting flow channel plate 11 are fixed by brazing, and the mounting structure 2 and the stamped flow channel plate 12 are also fixed by brazing, during the forming process of the battery cover, flux can be applied to the welding areas of the upper and lower side walls of the stamped flow channel plate 12 first, and the mounting structure 2, the stamped flow channel plate 12, and the supporting flow channel plate 11 can be stacked, so that the first protrusion 1B is located inside the second concave portion 2A, and the second protrusion 2B is located inside the first concave portion 1A; then, the mounting structure 2 and the stamped flow channel plate 12 are fixed by tooling positioning and spot welding or laser welding pre-welding, and then the mounting structure 2, the stamped flow channel plate 12, and the supporting flow channel plate 11 are simultaneously put into the brazing furnace to achieve simultaneous welding of the mounting structure 2, the stamped flow channel plate 12, and the supporting flow channel plate 11.

[0049] Please continue to refer to this. Figures 1-3 In this embodiment, the upper sidewall of the liquid cooling plate connecting part 21 has an integrally formed protrusion 22, and the mounting structure 2 also includes a body connecting part, which is mechanically connected to the protrusion 22.

[0050] The liquid cooling plate connecting part 21 and the protrusion 22 are integrally formed, specifically by casting process, which improves forming efficiency and reduces manufacturing cost. At the same time, the protrusion 22 provides a setting position for the body connecting part, and the battery cover can be connected to the body through the body connecting part, thereby realizing the mounting connection of the battery pack on the body.

[0051] Please continue to refer to this. Figure 3 In this embodiment, the vehicle body connection part includes a threaded connector 23, the head 231 of the threaded connector 23 is embedded inside the protrusion 22, and the rod 232 of the threaded connector 23 extends upward.

[0052] In this way, the threaded connector 23 can be threadedly connected to the connecting nut located on the vehicle body, thereby achieving reliable mounting of the battery pack.

[0053] The threaded connector 23 and the convex bulge 22 can be joined together using an insert casting process to achieve a reliable structural connection. The threaded connector 23 is preferably made of stainless steel to ensure corrosion resistance after furnace brazing.

[0054] Furthermore, in this embodiment, the rod portion 232 of the threaded connector 23 includes a non-threaded segment 2321 and a threaded segment 2322. The non-threaded segment 2321 is close to the head 231 of the threaded connector 23 and is at least partially embedded inside the protrusion 22, while the threaded segment 2322 is exposed outside the protrusion 22.

[0055] Thus, in the rod portion 232 of the threaded connector 23, only the non-threaded section 2321 is enclosed inside the bulge 22 to prevent casting liquid from overflowing through the thread gap during the casting process.

[0056] Please refer to Figure 5 , Figure 5 This is a cross-sectional view along the height direction of a second specific embodiment of the battery cover provided in this application.

[0057] In some embodiments of this application, the vehicle body connection portion includes a threaded connection hole 22a disposed on the protrusion 22, the upper end of the threaded connection hole 22a being an open end.

[0058] In this way, the threaded connection hole 22a can be threadedly connected to the threaded connector provided on the vehicle body, so as to realize the reliable mounting of the battery pack.

[0059] The threaded connection hole 22a can be implemented in several ways, such as:

[0060] In the first implementation, a recessed groove can be machined on the upper end face of the convex hull 22, and then an internal thread can be machined on the inner wall of the recessed groove, thus forming a threaded connection hole 22a.

[0061] In the second implementation, a recessed groove can be machined on the upper end face of the convex hull 22, and then the threaded sleeve can be embedded in the recessed groove, thus forming a threaded connection hole 22a inside the threaded sleeve.

[0062] like Figure 3 As shown, in this embodiment, the distance between the upper end face of the head 231 of the threaded connector 23 and the upper end face of the convex 22 is d1, and the value range of d1 is: d1≥3mm.

[0063] It can be seen that the distance between the upper end face of the head 231 of the threaded connector 23 and the upper end face of the convex 22 is also the thickness of the load-bearing structure in the convex 22. By limiting the range of values ​​of d1, the structural strength of the load-bearing structure in the convex 22 can be guaranteed, the load-bearing capacity of the load-bearing structure can be improved, and the connection reliability between the threaded connector 23 and the convex 22 can be guaranteed.

[0064] Furthermore, in this embodiment, the included angle between the skirt of the convex bulge 22 and the upper sidewall of the liquid cooling plate connection 21 is α, and the value range of α is: α≥120°;

[0065] The distance between the upper end face of the convex bulge 22 and the upper side wall of the liquid cooling plate connection part 21 is d2, and the width of the liquid cooling plate connection part 21 is d3. The relationship between the two satisfies: d2≥0.1d3.

[0066] As specified above, the outer edge of the convex bulge 22 is made as large as possible, that is, the ratio of the diameter of the connection end between the convex bulge 22 and the liquid cooling plate connection part 21 to the width of the liquid cooling plate connection part 21 is made as large as possible, so as to achieve the purpose of uniformly transmitting the load-bearing force, avoid stress concentration, and improve the structural reliability.

[0067] Please continue to refer to this. Figure 3 In this embodiment, the distance between the upper side wall of the liquid cooling plate connecting part 21 and the closed end wall of the second recess 2A is d4, and the value range of d4 is: 2mm≤d2≤5mm.

[0068] It can be seen that the distance between the upper side wall of the liquid cooling plate connecting part 21 and the closed end wall of the second recess 2A, that is, the minimum thickness of the liquid cooling plate connecting part 21, can ensure the structural strength of the liquid cooling plate connecting part 21 and the structural reliability of the liquid cooling plate 2 by limiting the range of values ​​of d4.

[0069] Furthermore, in some embodiments of this application, the peripheral wall of the head 231 of the threaded connector 23 and the inner wall of the protrusion 22 have a recess and a protrusion, respectively, and the protrusion and the recess engage with each other.

[0070] In this way, the load-bearing force provided by the head 231 of the threaded connector 23 can be evenly applied to the convex 22, avoiding excessive local stress that could lead to structural failure, further improving the connection strength between the head 231 of the threaded connector 23 and the convex 22, and ensuring the reliable connection between the threaded connector 23 and the convex 22.

[0071] In some other embodiments of this application, the head 231 of the threaded connector 23 includes a large end and a small end, the cross-sectional area of ​​the large end is larger than that of the small end, and the small end is closer to the shank 232 of the threaded connector 23 than the large end.

[0072] As configured above, the side of the head 231 forms an upward-facing inclined surface, which also serves as a support, increasing the support area of ​​the head 231 of the threaded connector 23 and the bearing area of ​​the convex 22. This allows the load-bearing force provided by the head 231 of the threaded connector 23 to be evenly applied to the convex 22, further improving the connection strength between the head 231 of the threaded connector 23 and the convex 22, and ensuring a reliable connection between the threaded connector 23 and the convex 22.

[0073] Depend on Figure 1 and Figure 2 As can be seen, in this embodiment, the upper sidewall of the liquid cooling plate connecting part 21 has two protrusions 22. Each mounting structure is connected to the vehicle body through two vehicle body connecting parts. In practice, the number of protrusions 22 on the upper sidewall of the liquid cooling plate connecting part 21 is not limited; for example, at least one protrusion 22 can be provided on the upper sidewall of the liquid cooling plate connecting part 21.

[0074] Please continue to refer to this. Figure 1 In this embodiment, the battery cover includes multiple mounting components, which are spaced apart along the length of the liquid cooling plate 1. Each mounting component includes multiple mounting structures 2, which are spaced apart along the width of the liquid cooling plate 1.

[0075] Thus, in this embodiment, the battery cover is connected to the vehicle body through multiple mounting structures 2 arranged in an array, increasing the connection points between the battery cover and the vehicle body, thereby increasing the connection strength between the battery pack and the vehicle body. At the same time, in each mounting component, multiple mounting structures 2 are distributed at intervals along the width direction of the liquid cooling plate 1, which can alleviate the problem of flatness deterioration caused by inconsistent thermal expansion of each welding structure during the brazing process and improve the flatness of the battery cover.

[0076] Depend on Figure 1As can be seen, in this embodiment, the battery cover includes three mounting components, and each mounting component includes three mounting structures 2. That is, the battery cover is connected to the vehicle body through nine mounting structures 2 arranged in an array, ensuring the connection stability between the battery pack and the vehicle body. In practice, the number of mounting components is not limited, nor is the number of mounting structures 2 included in each mounting component. It can be adaptively adjusted according to structural requirements. For example, the number of mounting components can be at least two, and the number of mounting structures 2 included in each mounting component can also be more than two.

[0077] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the mounting component in a second specific embodiment of the battery cover provided in this application.

[0078] In this embodiment, in the same mounting assembly, the liquid cooling plate connection part 21 of each mounting structure 2 is integrally formed.

[0079] In this way, each mounting structure 2 in the same mounting component forms an integrated structure, and each mounting component can be processed and formed at one time and connected to the liquid cooling plate 1 at one time, thereby improving the processing efficiency and assembly efficiency of the mounting component.

[0080] In this embodiment, the materials of the liquid cooling plate connection 21 and the bulge 22 are preferably brazed Al-Mn alloys, which take into account the characteristics of high temperature resistance, corrosion resistance, easy processing and low cost.

[0081] This embodiment also provides a battery pack, including the aforementioned battery cover.

[0082] The battery pack in this embodiment includes the aforementioned battery cover, and therefore has the same technical effect as the aforementioned battery cover, which will not be described again here.

[0083] This embodiment of the battery pack also includes a lower housing and a cell assembly. A battery cover is connected to the upper part of the lower housing. The battery cover and the lower housing together enclose a cavity for housing the cell assembly. The cell assembly is inverted inside the cavity of the battery pack housing. Specifically, the bottom surface of the cell assembly faces the battery cover, meaning the bottom surface of the cell assembly is opposite to the battery cover and bonded with a thermally conductive material. The terminal ends of the cell assembly face the lower housing, meaning the cell's explosion-proof valve faces the ground. This inverted cell arrangement shares the venting space required for thermal runaway with the reserved space required for bottom ball impact, increasing the available space for the cell assembly within the battery pack housing cavity. In other words, with the same structure, it increases the number of cell assemblies the battery pack housing can accommodate, improving the cell assembly arrangement efficiency, thereby increasing the battery pack's capacity and the vehicle's driving range. Simultaneously, since there is no need to install transverse or longitudinal beams in the housing cavity, the weight of the battery pack is reduced to some extent, conforming to the lightweight design concept.

[0084] The battery cover can be connected to the lower casing by welding or screwing to ensure a reliable connection between the two.

[0085] This embodiment also provides a vehicle including the aforementioned battery pack.

[0086] The vehicle in this embodiment includes the aforementioned battery pack, and therefore has the same technical effects as the aforementioned battery pack, which will not be described again here.

[0087] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery cover, characterized in that, include: The liquid cooling plate (1) has a first recess (1A) and a first protrusion (1B) spaced apart on its upper sidewall, and the interior of the first protrusion (1B) forms a liquid flow channel of the liquid cooling plate (1). Mounting structure (2), the mounting structure (2) includes a liquid cooling plate connecting part (21), the lower side wall of the liquid cooling plate connecting part (21) has a second recess (2A) and a second protrusion (2B) spaced apart, the first protrusion (1B) and the second recess (2A) are adapted to each other and connected to each other, the second protrusion (2B) and the first recess (1A) are adapted to each other and connected to each other.

2. The battery cover according to claim 1, characterized in that, The upper sidewall of the liquid cooling plate connecting part (21) has an integrally formed protrusion (22), and the mounting structure (2) also includes a vehicle body connecting part, which is mechanically connected to the protrusion (22).

3. The battery cover according to claim 2, characterized in that, The vehicle body connection part includes a threaded connection hole (22a) provided on the protrusion (22), and the upper end of the threaded connection hole (22a) is an open end.

4. The battery cover according to claim 2, characterized in that, The vehicle body connection includes a threaded connector (23), the head (231) of which is embedded inside the protrusion (22), and the rod (232) of which extends upward.

5. The battery cover according to claim 4, characterized in that, The rod portion (232) of the threaded connector (23) includes a non-threaded section (2321) and a threaded section (2322). The non-threaded section (2321) is close to the head (231) of the threaded connector (23). The non-threaded section (2321) is at least partially embedded inside the protrusion (22), and the threaded section (2322) is exposed outside the protrusion (22).

6. The battery cover according to claim 4, characterized in that, The distance between the upper end face of the head (231) of the threaded connector (23) and the upper end face of the convex bulge (22) is d1, and the value range of d1 is: d1≥3mm.

7. The battery cover according to claim 2, characterized in that, The included angle between the skirt of the convex bulge (22) and the upper sidewall of the liquid cooling plate connection (21) is α, and the value range of α is: α≥120°; The distance between the upper end face of the convex bulge (22) and the upper side wall of the liquid cooling plate connecting part (21) is d2, and the width of the liquid cooling plate connecting part (21) is d3. The relationship between the two satisfies: d2≥0.1d3.

8. The battery cover according to claim 1, characterized in that, The distance between the upper side wall of the liquid cooling plate connecting part (21) and the closed end wall of the second recess (2A) is d4, and the value range of d4 is: 2mm≤d4≤5mm.

9. The battery cover according to any one of claims 1-8, characterized in that, The battery cover includes multiple mounting components, which are spaced apart along the length of the liquid cooling plate (1). Each mounting component includes multiple mounting structures (2), which are spaced apart along the width of the liquid cooling plate (1).

10. A battery pack, characterized in that, Includes the battery cover as described in claim 9.

11. A vehicle, characterized in that, Includes the battery pack as described in claim 10.

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