Top cover assembly, battery, battery pack and vehicle

Abstract

The utility model discloses a top cover assembly, a battery, a battery pack and a vehicle, the top cover assembly comprises a top cover, an anti-explosion valve and a protection sheet, and the anti-explosion valve is connected to the top cover; the protection sheet is connected to the top cover and covers the anti-explosion valve; wherein one of the top cover and the protection sheet is provided with a first main body part and a buckling column, the other one is provided with a second main body part and an abutting part, the buckling column comprises a column part and a cap part, the column part is connected to the first main body part, the cap part is connected to the end, away from the first main body part, of the column part, the outer diameter of the cap part is larger than that of the column part, and the second main body part is provided with a mounting hole; the abutting part is connected to the second main body part; the column part penetrates through the mounting hole, and the abutting part is configured to abut against the end face, facing the first body part, of the cap part so as to limit the protection piece from being separated from the top cover. The top cover assembly can improve the use reliability of the explosion-proof valve and reduce the safety risk. The explosion-proof valve is applied to the technical field of batteries.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to top cover assembly, battery, battery pack and vehicle. Background Technology

[0002] When the internal pressure or temperature of a battery rises abnormally, it is necessary to release the internal pressure to prevent excessive pressure from causing an explosion. Generally, an explosion-proof valve is installed on the top cover of the battery. When the internal pressure of the battery reaches a preset pressure, the explosion-proof valve opens to release the internal pressure and prevent extreme situations such as explosions.

[0003] Explosion-proof valves need to open under specific conditions. During daily use, batteries may accidentally damage the explosion-proof valve, causing it to open prematurely and leading to battery failure. To prevent this, explosion-proof valve patches are typically installed on the surface of the valve to protect it and improve battery reliability during daily use.

[0004] During daily use of batteries, the explosion-proof valve patch is prone to falling off. After losing the protection of the explosion-proof valve patch, the explosion-proof valve is prone to failure, increasing safety risks. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a top cover assembly that can improve reliability and reduce safety risks.

[0006] A battery having the aforementioned top cover assembly is also proposed;

[0007] A battery pack having the aforementioned battery is also proposed;

[0008] A vehicle with the aforementioned battery pack is also proposed.

[0009] The top cover assembly according to a first aspect embodiment of the present invention includes:

[0010] Top cover;

[0011] An explosion-proof valve is connected to the top cover;

[0012] A protective plate is attached to the top cover and covers the explosion-proof valve;

[0013] The top cover and the protective sheet each have a first main body and a fastening post, and the other has a second main body and an abutting part. The fastening post includes a post part and a cap part. The post part is connected to the first main body, and the cap part is connected to the end of the post part away from the first main body. The outer diameter of the cap part is larger than the outer diameter of the post part. The second main body has a mounting hole, and the abutting part is connected to the second main body.

[0014] The column portion passes through the mounting hole, and the abutment portion is configured to abut against the end face of the cap portion facing the first main body portion to prevent the protective sheet from detaching from the top cover.

[0015] According to the first aspect of the present invention, the top cover assembly has at least the following beneficial effects: the post portion of the first main body passes through the mounting hole of the second main body, the second main body is located between the first main body and the cap portion, the second main body and the first main body abut against each other at one end of the post portion connected to the first main body, the outer diameter of the cap portion is larger than the diameter of the post portion at the other end of the post portion connected to the cap portion, and the second main body abuts against the end face of the cap portion facing the first main body portion through the abutting portion, so that the second main body portion is limited between the first main body and the cap portion, that is, the first main body and the cap portion restrict the protective plate from falling out of the top cover, and at the same time the protective plate covers the explosion-proof valve, so that the protective plate can continuously and effectively protect the explosion-proof valve, thereby improving the reliability of the explosion-proof valve and reducing safety risks.

[0016] According to some embodiments of the present invention, the abutting portion and the second main body portion are connected as an integral structure.

[0017] According to some embodiments of the present invention, one end of the abutting portion is connected to the inner circumferential surface of the mounting hole.

[0018] According to some embodiments of the present invention, the abutting portion is provided in multiple ways, and the multiple abutting portions are distributed circumferentially along the corresponding column portion.

[0019] According to some embodiments of the present invention, the abutting portion abuts against the outer peripheral surface of the column portion.

[0020] According to some embodiments of the present invention, the fastening post and the mounting hole corresponding to the fastening post are both provided in multiple ways, and the multiple fastening posts and the multiple mounting holes are distributed along the circumference of the explosion-proof valve.

[0021] According to some embodiments of the present invention, the top cover assembly further includes an adhesive layer located between the protective sheet and the top cover, and surrounding the explosion-proof valve.

[0022] According to some embodiments of the present invention, the end of the cap portion away from the post portion has a deformation groove, and the deformation groove extends to the side of the cap portion.

[0023] The battery according to a second aspect embodiment of the present invention includes:

[0024] A housing having an opening and a receiving chamber communicating with the opening;

[0025] The battery cell is disposed within the accommodating chamber;

[0026] The top cover assembly described in the first aspect embodiment covers the opening and seals the receiving chamber.

[0027] The battery according to the second aspect embodiment of the present invention has at least the following beneficial effects: by using the top cover assembly in the first aspect embodiment, the protective sheet can continuously and effectively protect the explosion-proof valve during battery use, which is conducive to the normal realization of the explosion-proof function of the explosion-proof valve, thereby improving the reliability of battery use and reducing safety risks.

[0028] The battery pack according to a third aspect embodiment of the present invention includes: the battery described in the second aspect embodiment.

[0029] The battery pack according to the third aspect embodiment of the present invention has at least the following beneficial effects: by using the battery in the second aspect embodiment, the battery has higher reliability, which makes the battery pack formed by the battery more reliable and less risky to use.

[0030] The vehicle according to the fourth aspect of the present invention includes: the battery pack described in the third aspect embodiment.

[0031] The vehicle according to the fourth aspect embodiment of the present invention has at least the following beneficial effects: by adopting the battery pack in the third aspect embodiment, the reliability of the battery pack is improved, thereby improving the reliability of the vehicle during use and reducing safety risks.

[0032] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 This is a schematic diagram of the structure of the top cover assembly according to an embodiment of the present invention;

[0035] Figure 2 This is a cross-sectional schematic diagram of the top cover assembly according to an embodiment of the present invention;

[0036] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0037] Figure 4 This is a schematic diagram of the top cover assembly after removing the protective sheet according to an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the protective sheet in the top cover assembly according to an embodiment of the present invention;

[0039] Figure 6 for Figure 5 A magnified view of part B in the middle section;

[0040] Figure 7 The diagram shows six different implementations of the buckle post in the top cover assembly of this utility model: a) the buckle post has a flat cap; b) the buckle post has a spherical cap; c) the buckle post has an ellipsoidal cap; d) the buckle post has a flat cap and a deformation groove; e) the buckle post has a spherical cap and a deformation groove; f) the buckle post has an ellipsoidal cap and a deformation groove.

[0041] Icon labels:

[0042] Top cover 100; First main body 110; Buckle post 120; Post 121; Extension slot 1211; Cap 122; Deformation slot 1221;

[0043] Explosion-proof valve 200;

[0044] Protective plate 300; Second main body 310; Mounting hole 311; Abutment part 320;

[0045] Adhesive layer 400. Detailed Implementation

[0046] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0047] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0048] In the description of this utility model, "several" refers to one or more, and "multiple" refers to two or more. The use of "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0049] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0050] In related technologies, explosion-proof valves are generally located on the top cover. The explosion-proof valve patch is usually directly glued to the surface of the top cover and covers the explosion-proof valve. When the battery is in a long-term vibration environment, such as when the battery is installed in a vehicle, the adhesive is prone to failure due to long-term vibration. The explosion-proof valve patch will fall off due to adhesive failure, exposing the explosion-proof valve. When the explosion-proof valve is subjected to corrosion or impact from splashing objects, the explosion-proof valve is prone to open prematurely and cause battery failure, increasing the safety risk.

[0051] Reference Figures 1 to 7 As shown, the first aspect of this utility model provides a top cover assembly, which includes a top cover 100, an explosion-proof valve 200, and a protective sheet 300. The top cover assembly is used to assemble a battery. Please refer to... Figure 1 and Figure 2 The explosion-proof valve 200 is connected to the top cover 100. The explosion-proof valve 200 can open when the internal pressure of the battery reaches a preset pressure to play an explosion-proof role. The protective plate 300 is connected to the top cover 100 and covers the explosion-proof valve 200. The protective plate 300 can prevent splashing objects from colliding and opening the explosion-proof valve 200, reducing the possibility of the explosion-proof valve 200 opening due to accidents. The explosion-proof valve 200 can open normally under the preset pressure, improving the reliability of the explosion-proof valve 200 and reducing safety risks.

[0052] Among them, one of the top cover 100 and the protective plate 300 has a first main body 110 and a fastening post 120, and the other has a second main body 310 and an abutting part 320. The fastening post 120 includes a post part 121 and a cap part 122. The post part 121 is connected to the first main body 110, and the cap part 122 is connected to the end of the post part 121 away from the first main body 110. The outer diameter of the cap part 122 is larger than the outer diameter of the post part 121.

[0053] Specifically, please refer to Figure 7The column portion 121 is cylindrical, square, or other shapes, or a combination of multiple shapes, such as a combination of cylindrical and square columns. When the column portion 121 is square or other polygonal or combined shapes, the column portion 121 can restrict the mounting hole 311 from rotating around the circumference of the column portion 121 by its own shape. The cap portion 122 is flat or spherical, and the radial cross-section of the cap portion 122 perpendicular to the axis of the column portion 121 can be circular, elliptical, triangular, quadrilateral, or other polygonal shapes.

[0054] The second main body 310 has a mounting hole 311, an abutment portion 320 is connected to the second main body 310, a post portion 121 passes through the mounting hole 311, and the abutment portion 320 is configured to abut against the end face of the cap portion 122 facing the first main body 110 to limit the protective piece 300 from coming off the top cover 100.

[0055] Specifically, the mounting hole 311 is a circular hole, a square hole, or other polygonal holes or combinations thereof, and the mounting hole 311 passes through the column portion 121. Please refer to... Figure 3 As shown, one end of the abutment portion 320 is connected to the inner circumferential surface of the mounting hole 311 of the first main body portion 110. The abutment portion 320 is inclined toward the buckle post 120. The other end of the abutment portion 320 abuts against the end face of the cap portion 122 toward the first main body portion 110. The abutment portion 320 and the cap portion 122 prevent the second main body portion 310 from dislodging from the mounting hole 311 of the second main body portion 310 and the buckle post 120, so that the protective plate 300 can continuously and effectively protect the explosion-proof valve 200, improve the reliability of the explosion-proof valve 200 and reduce safety risks.

[0056] To facilitate understanding of the state where the abutting part 320 abuts against the cap part 122, the assembly process of the first main body part 110 and the second main body part 310 will be described. First, the unassembled state of the second main body part 310 will be described; please refer to... Figure 5 and Figure 6The surface perpendicular to the axis of the mounting hole 311 is defined as the projection surface. At least a portion of the projection of the abutment portion 320 in the projection surface coincides with the projection of the mounting hole 311 in the projection surface. For example, the abutment portion 320 is connected to the inner circumferential surface of the mounting hole 311 and is completely located within the mounting hole 311. Next, the assembly process of the second main body portion 310 and the first main body portion 110 will be described. The retaining post 120 is aligned and inserted into the corresponding mounting hole 311. The projection portion of the abutment portion 320 that coincides with the mounting hole 311 is pushed and deformed by the retaining post 120 and tilts towards the retaining post 120 until it abuts against the end face of the cap portion 122 of the retaining post 120 facing the post portion 121. After the abutment portion 320 is deformed, the second main body portion 310 forms a mounting hole 311 through which the post portion 121 passes. Finally, the specific deformation process of the abutment portion 320 during assembly is explained. During the deformation process of the abutment portion 320, the inclined end of the abutment portion 320 contacts the outer peripheral surface of the buckle post 120, and its contact position moves from the end face of the cap portion 122 away from the first main body portion 110 to the end face of the cap portion 122 facing the first main body portion 110. Since the outer diameter of the cap portion 122 is larger than the outer diameter of the post portion 121, when the abutment portion 320 moves to the end face of the cap portion 122 facing the first main body portion 110, the abutment portion 320 will be limited by its own tilt angle to abut against the end face of the cap portion 122 facing the first main body portion 110, and it is not easy to dislodge the buckle post 120 along the outer peripheral surface of the cap portion 122. That is, the abutment portion 320 can abut against the end face of the cap portion 122 facing the first main body portion 110 to limit the protective piece 300 from dislodging from the top cover 100.

[0057] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The top cover 100 has a first main body portion 110 and a fastening post 120, and the protective sheet 300 has a second main body portion 310 and an abutting portion 320. In other embodiments, the protective sheet 300 has a first main body portion 110 and a fastening post 120, and the top cover 100 has a second main body portion 310 and an abutting portion 320.

[0058] In summary, after the mounting hole 311 of the second main body 310 is installed into the snap post 120 of the first main body 110, the snap post 121 of the first main body 110 passes through the mounting hole 311 of the second main body 310. The second main body 310 is located between the first main body 110 and the cap 122. The snap post 121 is connected to one end of the first main body 110, and the second main body 310 and the first main body 110 abut against each other and are mutually limited. The snap post 121 is connected to the other end of the cap 122, and the outer diameter of the cap 122 is larger than that of the snap post. The diameter of 121 is such that the second main body 310 abuts against the end face of the cap 122 facing the first main body 110 via the abutment portion 320, so that the second main body 310 is limited between the first main body 110 and the cap 122. In other words, the first main body 110 and the cap 122 restrict the protective plate 300 from coming off the top cover 100, while the protective plate 300 covers the explosion-proof valve 200, so that the protective plate 300 can continuously and effectively protect the explosion-proof valve 200, thereby improving the reliability of the explosion-proof valve 200 and reducing safety risks.

[0059] Reference Figure 5 and Figure 6 As shown, in some specific embodiments of this utility model, the abutting part 320 and the second main body part 310 are connected as an integral structure.

[0060] Generally, forming a hole in the second main body 310 involves completely removing all material from a predetermined area. However, in this embodiment, the method of forming the mounting hole 311 differs. Specifically, the difference lies in the following: the second main body 310 cuts off a portion of the material within the predetermined area, leaving another portion of the material in the predetermined area to form the abutment portion 320. Therefore, the abutment portion 320 is connected to the second main body 310 as an integral structure. The abutment portion 320 is deformed by the retaining post 120 to form the mounting hole 311. In this way, the abutment portion 320 is directly formed using the remaining material after cutting, eliminating the need for separate processing and saving processing time and raw materials. That is, in this embodiment, the forming method of the abutment portion 320 improves both the manufacturing efficiency and the manufacturing cost of the abutment portion 320.

[0061] In another embodiment, the abutting part 320 is connected to the second main body part 310 as an integral structure by a separate material. For example, the abutting part 320 and the second main body part 310 are thermally fused together, and the thermal fusion position can be on the inner circumferential surface of the mounting hole 311 or at other positions of the second main body part 310.

[0062] Reference Figure 6 As shown, in some specific embodiments of this utility model, one end of the abutment portion 320 is connected to the inner circumferential surface of the mounting hole 311.

[0063] In this embodiment, the second main body 310 cuts part of the material within a predetermined area and retains another part of the material in the predetermined area to form the abutment part 320. After the abutment part 320 is formed, one end of the abutment part 320 is connected to the inner peripheral surface of the mounting hole 311 and forms an integral structure, which improves the manufacturing efficiency of the abutment part 320 and reduces the manufacturing cost of the abutment part 320.

[0064] As another implementation, the connection position between the abutment portion 320 and the second main body portion 310 can be other positions of the second main body portion 310 besides the mounting hole 311, as long as at least part of the projection of the abutment portion 320 in the projection plane coincides with the projection of the mounting hole 311 in the projection plane, and during the assembly process of the mounting hole 311 and the fastener 120, the abutment portion 320 can be deformed so that the end face of the abutment cap portion 122 faces the first main body portion 110.

[0065] Reference Figure 6 As shown, in some specific embodiments of this utility model, multiple abutment portions 320 are provided, and the multiple abutment portions 320 are distributed circumferentially along the corresponding column portions 121, so that they can abut against the end face of the cap portion 122 facing the first main body portion 110 along the circumferential direction of the column portion 121. The multiple abutment portions 320 abut against multiple positions of the cap portion 122, improving the stability of the abutment and making the protective sheet 300 less likely to fall off relative to the top cover 100. Among them, the multiple abutment portions 320 are evenly distributed along the circumferential direction of the column portion 121, and the multiple abutment portions 320 abut against multiple positions of the cap portion 122 evenly distributed along the axial direction of the column portion 121, making the distribution of the abutment force more uniform and improving the fixing effect of the protective sheet 300.

[0066] In this embodiment, the second main body 310 cuts two mutually perpendicular linear through holes within a predetermined area. The two linear through holes divide the remaining material in the predetermined area into four parts. Each part of the remaining material is an abutment part 320, and the four abutment parts 320 are evenly distributed along the circumference of the column part 121.

[0067] Reference Figure 3As shown, in some specific embodiments of this utility model, the abutting portion 320 abuts against the outer peripheral surface of the post portion 121, so that the abutting portion 320 can better hold the post 120 and restrict the radial movement of the post 120. Specifically, when the second main body portion 310 has not yet been assembled with the first main body portion 110, the slit length of the second main body portion 310 cut to form the abutting portion 320 is less than the axial length of the post portion 121. Therefore, during the reset process after the abutting portion 320 is pushed open by the cap portion 122, the abutting portion 320 resets to abut against the post portion 121. Furthermore, when the column portion 121 is relatively long, the abutting portion 320 abuts against the outer peripheral surface of the column portion 121. In this case, the protective plate 300 needs to undergo a small displacement relative to the top cover 100 along the axial direction of the column portion 121 before the abutting portion 320 abuts against the end of the cap portion 122 facing the first main body portion 110. When the column portion 121 is relatively short, the abutting portion 320 abuts against both the outer peripheral surface of the column portion 121 and the end face of the cap portion 122 facing the first main body portion 110, that is, it abuts against the junction of the column portion 121 and the cap portion 122. The abutting portion 320 restricts both the radial movement of the buckle 120 and the axial movement of the buckle 120. In this case, the displacement between the protective plate 300 and the top cover 100 can be restricted.

[0068] In this embodiment, if the axial length of the column portion 121 is sufficient, the abutment portion 320 can move along the axial direction of the column portion 121 on the outer peripheral surface of the column portion 121, then the abutment portion 320 will abut against the outer peripheral surface of the column portion 121 or against the end face of the cap portion 122 facing the first main body portion 110.

[0069] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some specific embodiments of this utility model, multiple fasteners 120 and mounting holes 311 corresponding to the fasteners 120 are provided, and the multiple fasteners 120 and multiple mounting holes 311 are distributed along the circumference of the explosion-proof valve 200.

[0070] Specifically, multiple fasteners 120 and multiple mounting holes 311 are evenly distributed along the circumference of the explosion-proof valve 200, so that the protective plate 300 can be evenly fixed along the circumference of the explosion-proof valve 200, and the fixing effect of the protective plate 300 is better.

[0071] In this embodiment, there are four latching posts 120 and four mounting holes 311. The four latching posts 120 and the four mounting holes 311 are evenly distributed along the circumference of the explosion-proof valve 200, and there is a one-to-one correspondence between the four latching posts 120 and the four mounting holes 311. The number of latching posts 120 can also be two, three, or more, and the number of mounting holes 311 corresponds to the number of latching posts 120.

[0072] Reference Figure 5As shown, in some specific embodiments of this utility model, the top cover assembly further includes an adhesive layer 400, which is located between the protective sheet 300 and the top cover 100 and surrounds the explosion-proof valve 200.

[0073] It is understandable that the protective sheet 300 is bonded to the top cover 100 via the adhesive layer 400. This connection between the protective sheet 300 and the top cover 100 is more reliable, improving the reliability of the explosion-proof valve 200 and reducing safety risks. Simultaneously, the adhesive layer 400 surrounds the explosion-proof valve 200, sealing the gap between the protective sheet 300 and the top cover 100, reducing the probability of liquid or gas entering and corroding the explosion-proof valve 200, thus improving its reliability and reducing safety risks. Specifically, when the protective sheet 300 is bonded to the top cover 100 via the adhesive layer 400, and the abutting portion 320 abuts against the end face of the cap 122 facing the first main body portion 110, the mutual abutting force between the abutting portion 320 and the cap 122 compresses the adhesive layer 400, ensuring a tight bond between the adhesive layer 400 and the top cover 100, resulting in a better bonding effect.

[0074] It should be noted that when the protective plate 300 is provided with mounting holes 311, in order to ensure the protective effect of the protective plate 300, the mounting holes 311 are located outside the inner ring of the adhesive layer 400. For example, in this embodiment, the mounting holes 311 are located within the coverage area of ​​the adhesive layer 400. The adhesive layer 400 is provided with clearance holes, which are aligned along the axial direction of the column portion 121 and communicate with the mounting holes 311. After the protective plate 300 and the top cover 100 are installed, the fastening post 120 passes through the clearance holes and the mounting holes 311. The gap between the fastening post 120 and the clearance holes and the mounting holes 311 will be sealed by the adhesive layer 400. The explosion-proof valve 200 connected to the top cover 100 will be completely sealed by the adhesive layer 400 and the protective plate 300 to completely isolate liquids or gases. The explosion-proof valve 200 is not easily corroded by liquids or gases and will fail, which improves the reliability of the explosion-proof valve 200 and reduces safety risks. Meanwhile, the position of the adhesive layer 400 coincides with the location of the mounting hole 311, which can reduce the maximum size of the protective sheet 300 and save on the material cost of the protective sheet 300. For example, in other embodiments, the mounting hole 311 is located on the outside of the adhesive layer 400, yet the adhesive layer 400 can still seal the explosion-proof valve 200.

[0075] Reference Figure 7 As shown, in some specific embodiments of this utility model, the end of the cap 122 away from the post 121 has a deformation groove 1221, which extends to the side of the cap 122.

[0076] It is understandable that during the process of fitting the mounting hole 311 into the buckle 120, the second main body 310 drives the cap 122 to undergo elastic deformation towards the deformation groove 1221 through the mounting hole 311, so that the outer diameter of the cap 122 is reduced due to its own elastic deformation, which makes it easier for the mounting hole 311 to pass through the cap 122, and the installation of the second main body 310 and the cap 122 is more convenient.

[0077] In this embodiment, the end of the column 121 connected to the cap 122 has an extension slot 1211. The extension slot communicates with the deformation groove 1221 and passes through the column 121 in the same direction as the deformation groove 1221 through the cap 122. The extension slot 1211 can increase the lever arm when the cap 122 undergoes elastic deformation toward the deformation groove 1221, making it easier for the cap 122 to undergo elastic deformation toward the deformation groove 1221. The installation of the second main body 310 and the cap 122 is more convenient.

[0078] The second aspect of this utility model provides a battery, which includes: a housing, a battery cell, and a top cover assembly as described in the first aspect. The housing has an opening and a receiving chamber communicating with the opening; the battery cell is disposed within the receiving chamber; and the top cover assembly covers the opening and seals the receiving chamber.

[0079] It is worth understanding that the battery adopts the top cover assembly in the first aspect embodiment. During the use of the battery, the protective sheet 300 can continuously and effectively protect the explosion-proof valve 200, which is conducive to the normal realization of the explosion-proof function of the explosion-proof valve 200, thereby improving the reliability of the battery and reducing safety risks.

[0080] In this embodiment, the top cover assembly has a pole and the battery cell has an electrode, which is electrically connected to the pole. Then, the battery cell is installed inside the housing before the top cover assembly. After installation, the top cover assembly is placed over the opening of the housing. Subsequently, the housing and the top cover assembly are connected as one unit by welding. The connection between the top cover assembly and the housing is more reliable and the sealing performance of both is better.

[0081] A third aspect of this utility model provides a battery pack, which includes the battery of the second aspect embodiment. It is understood that the battery pack uses the battery of the second aspect embodiment, which has higher reliability, resulting in a more reliable battery pack with lower usage risk. The battery pack is generally formed by multiple batteries connected in series and / or parallel. Other structures of the battery pack are common knowledge to those skilled in the art and will not be described in detail here.

[0082] A fourth aspect of this utility model provides a vehicle comprising a battery pack according to the third aspect embodiment. It is understood that by using the battery pack of the third aspect embodiment, the reliability of the battery pack is improved, thereby enhancing the reliability of the vehicle during use and reducing safety risks.

[0083] The vehicles can be private cars, such as sedans, SUVs, MPVs, or pickup trucks. They can also be commercial vehicles, such as vans, buses, small trucks, or large semi-trailers. Vehicles can be either gasoline-powered or new energy vehicles. When a vehicle is a new energy vehicle, it can be a hybrid or a pure electric vehicle.

[0084] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A cap assembly, characterized by, The top cover assembly comprises: a top cover; an explosion-proof valve connected to the top cover; a protection sheet connected to the top cover and covering the explosion-proof valve; wherein one of the top cover and the protection sheet has a first body portion and a buckle post, and the other has a second body portion and an abutting portion, the buckle post comprises a post portion and a cap portion, the post portion is connected to the first body portion, the cap portion is connected to an end of the post portion away from the first body portion, and an outer diameter of the cap portion is greater than an outer diameter of the post portion, the second body portion has a mounting hole, and the abutting portion is connected to the second body portion; the post portion is arranged through the mounting hole, and the abutting portion is configured to be capable of abutting against an end surface of the cap portion towards the first body portion to limit the protection sheet from being pulled out of the top cover.

2. The roof assembly of claim 1, wherein: The abutting portion and the second body portion are connected as an integral structure.

3. The roof assembly of claim 1, wherein: One end of the abutting portion is connected to an inner circumferential surface of the mounting hole.

4. The roof assembly of claim 1, wherein: The abutting portion is provided in a plurality, and the plurality of abutting portions are distributed along a circumferential direction corresponding to the post portion.

5. The roof assembly of claim 1, wherein: The buckle post and the mounting hole corresponding to the buckle post are both provided in a plurality, and the plurality of buckle posts and the plurality of mounting holes are distributed along a circumferential direction of the explosion-proof valve.

6. The roof assembly of claim 1, wherein: The top cover assembly further comprises a glue layer between the protection sheet and the top cover and arranged around the explosion-proof valve.

7. The roof assembly of claim 1, wherein: An end of the cap portion away from the post portion has a deformation groove, and the deformation groove penetrates to a side surface of the cap portion.

8. A battery, characterized by The battery pack comprises: a shell having an opening and a containing cavity communicated with the opening; an electric core arranged in the containing cavity; the top cover assembly of any one of claims 1 to 7, covering the opening and sealing the containing cavity.

9. A battery pack, characterized by, The battery comprises: the battery of claim 8.

10. A vehicle characterized by comprising: The battery pack comprises: the battery of claim 9.

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