Battery top cover, battery top cover assembly and battery

Abstract

The utility model discloses a battery top cover, a battery top cover assembly and a battery. The battery top cover comprises a top cover body, the top cover body is internally provided with a mounting hole for a pole to penetrate through; the top cover body is provided with a first protrusion and a plurality of second protrusions, the first protrusion is arranged around the mounting hole, one end of each second protrusion is connected to the first protrusion, the other end of each second protrusion extends in the direction away from the first protrusion, and the first protrusion and the second protrusions are used for being at least partially embedded into an isolation rubber layer. In this way, the second protrusions extend in the direction away from the first protrusions from the first protrusions, so that the first protrusions and the second protrusions form a crossed structure. Furthermore, when the pole and the top cover body form the isolation rubber layer, the cross structure can be embedded into the isolation rubber layer to limit and fix the isolation rubber layer, so that the isolation rubber layer is effectively prevented from rotating relative to the top cover body, and the performance of the pole is prevented from being influenced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery top cover, a battery top cover assembly and a battery. Background Art

[0002] In modern society, more and more power tools and new energy vehicles are developing towards high capacity and high safety. Lithium-ion batteries are widely used in power tools due to their high capacity and other excellent characteristics. In addition to long life, lithium-ion batteries must also meet safety standards and meet people's needs.

[0003] In the related art, the top cover of a power battery generally includes: a top cover, a pole and an upper plastic; a mounting hole is provided in the top cover, the pole is inserted into the mounting hole, and the upper plastic is injected between the pole and the top cover to seal and isolate the pole and the top cover. However, the existing upper plastic can rotate relative to the top cover, affecting the performance of the pole. Utility Model Content

[0004] The present application aims to provide a battery top cover, a battery top cover assembly and a battery, which can solve the problem that the upper plastic in the power battery top cover of the related art will rotate relative to the top cover, affecting the performance of the pole.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application proposes a battery top cover, including a top cover body; a mounting hole for passing a pole is provided in the top cover body; a first protrusion and a plurality of second protrusions are provided on the top cover body, the first protrusion is arranged around the mounting hole, one end of the second protrusion is connected to the first protrusion, and the other end extends in a direction away from the first protrusion, and the first protrusion and the second protrusion are used to be at least partially embedded in the isolation rubber layer.

[0007] Optionally, a plurality of the second protrusions are radially distributed along a radial direction of the first protrusion.

[0008] Optionally, one end of the second protrusion is connected to the side of the first protrusion facing away from the mounting hole, and the other end extends in a direction away from the mounting hole; or, one end of the second protrusion is connected to the side of the first protrusion facing the mounting hole, and the other end extends toward the mounting hole.

[0009] Optionally, a plurality of third protrusions are further included; the plurality of third protrusions are arranged on a side of the first protrusion away from the top cover body, and are spaced apart along the circumferential direction of the first protrusion.

[0010] Optionally, the first protrusion includes a plurality of first sub - protrusions, and the plurality of first sub - protrusions are arranged at intervals around the circumference of the mounting hole.

[0011] Optionally, the mounting hole has a radial direction and an axial direction. The dimension of the first protrusion in the radial direction is L, and the dimension of the first protrusion in the axial direction Y is H, satisfying: 0.05mm 2 ≤L * H≤5.00mm 2 .

[0012] Optionally, the dimension L of the first protrusion in the radial direction satisfies: 0.05mm≤L≤3.00mm; and / or, the dimension H of the first protrusion in the axial direction satisfies: 0.05mm≤H≤5.00mm.

[0013] Optionally, the first protrusion and the second protrusion are integrally formed, and / or, the first protrusion and the third protrusion are integrally formed.

[0014] In a second aspect, an embodiment of the present application provides a battery top cover assembly, including: a pole column, an insulating glue layer, and the battery top cover as described in any one of the above embodiments. The pole column passes through the mounting hole, the insulating glue layer is arranged between the pole column and the top cover body, and at least a part of the first protrusion and the second protrusion is embedded in the insulating glue layer.

[0015] In a third aspect, an embodiment of the present application provides a battery, including the battery top cover as described in any one of the above embodiments, or including the battery top cover assembly as described in the above embodiments.

[0016] In the embodiment of the present application, by providing a mounting hole for passing the pole column in the top cover body, the first protrusion is arranged around the circumference of the mounting hole, and one end of a plurality of second protrusions is connected to the first protrusion, and the other end extends in a direction away from the first protrusion. In this way, by setting the second protrusion to extend away from the first protrusion, a cross - structure is formed between the first protrusion and the second protrusion. Further, when an insulating glue layer is formed between the pole column and the top cover body, the cross - structure can be embedded in the insulating glue layer to limit and fix the insulating glue layer, thereby effectively preventing the insulating glue layer from rotating relative to the top cover body, and further avoiding affecting the performance of the pole column.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above - mentioned and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0019] Figure 1 is the top view of the first battery top cover according to an embodiment of the present application;

[0020] Figure 2 is the perspective view of the first battery top cover according to an embodiment of the present application;

[0021] Figure 3 is the top view of the second battery top cover according to an embodiment of the present application;

[0022] Figure 4 is the perspective view of the second battery top cover according to an embodiment of the present application;

[0023] Figure 5 is the top view of the third battery top cover according to an embodiment of the present application;

[0024] Figure 6 is the perspective view of the third battery top cover according to an embodiment of the present application;

[0025] Figure 7 is the top view of the fourth battery top cover according to an embodiment of the present application;

[0026] Figure 8 is the perspective view of the fourth battery top cover according to an embodiment of the present application;

[0027] Figure 9 is the top view of the fifth battery top cover according to an embodiment of the present application;

[0028] Figure 10 is the perspective view of the fifth battery top cover according to an embodiment of the present application;

[0029] Figure 11 is the sectional view of the battery top cover according to an embodiment of the present application;

[0030] Figure 12 is the enlarged partial view of the battery top cover according to an embodiment of the present application;

[0031] Figure 13 is the top view of the battery top cover according to an embodiment of the present application;

[0032] Figure 14 is the front view of the battery top cover assembly according to an embodiment of the present application;

[0033] Figure 15 is the schematic diagram of the battery according to an embodiment of the present application.

[0034] Reference numerals:

[0035] 1 - Top cover body; 2 - Mounting hole; 3 - First protrusion; 4 - Second protrusion; 5 - Third protrusion; 6 - Battery top cover; 7 - Terminal post; 8 - Isolation adhesive layer; 9 - Battery top cover assembly; 10 - Housing; 11 - Battery; 31 - First sub - protrusion; X - Radial direction; Y - Axial direction. Detailed implementation manners

[0036] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0037] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / " generally represents an "or" relationship between the associated objects before and after.

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

[0039] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mount", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0040] The battery top cover, battery top cover assembly and battery provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0041] The battery top covers of the prior art generally include: a top cover, a pole post, and an isolation glue layer; an installation hole is provided in the top cover, and the pole post is passed through the installation hole. In order to fix the pole post and the top cover, it is necessary to injection-mold an isolation glue layer between the pole post and the top cover to seal and isolate the pole post and the top cover. However, since the part of the isolation glue layer in contact with the top cover is relatively smooth and flat, the isolation glue layer is prone to rotate relative to the top cover, thereby driving the pole post to rotate relative to the top cover, thus affecting the performance of the pole post.

[0042] As Figures 1 to 14 shown, the battery top cover 6 according to some embodiments of the present application includes a top cover body 1; an installation hole 2 for passing through a pole post 7 is provided in the top cover body 1; a first protrusion 3 and a plurality of second protrusions 4 are provided on the top cover body 1, the first protrusion 3 is arranged around the periphery of the installation hole 2, one end of the second protrusion 4 is connected to the first protrusion 3, and the other end extends in a direction away from the first protrusion 3. The first protrusion 3 and the second protrusion 4 are used to at least partially embed in the isolation glue layer 8.

[0043] In the embodiments of the present application, by providing an installation hole 2 for passing through a pole post 7 in the top cover body 1, the first protrusion 3 is arranged around the periphery of the installation hole 2, one end of a plurality of second protrusions 4 is connected to the first protrusion 3, and the other end extends in a direction away from the first protrusion 3. The first protrusion 3 and the second protrusion 4 are used to at least partially embed in the isolation glue layer 8. In this way, by setting the second protrusion 4 to extend from the first protrusion 3 in a direction away from the first protrusion 3, the first protrusion 3 and the second protrusion 4 form a cross structure. Furthermore, when forming the isolation glue layer 8 between the pole post 7 and the top cover body 1, the cross structure can be embedded in the isolation glue layer 8 to form a limit fixation for the isolation glue layer 8, thereby effectively preventing the isolation glue layer 8 from rotating relative to the top cover body 1, and further avoiding affecting the performance of the pole post 7.

[0044] In some embodiments, the assembly method of the battery top cover 6 of the present application is as follows: First, install the pole post 7 in the installation hole 2 in the top cover body 1, and then sequentially sleeved a sealing ring (not shown in the figure) and a lower plastic (not shown in the figure) on the side of the pole post 7 close to the battery electrolyte. Then, fix an isolation glue layer mold (not shown in the figure) around the first protrusion 3 and the second protrusion 4, and then pour the isolation glue material into the isolation glue layer mold. After the isolation glue material is cured into the isolation glue layer 8, the inner side of the isolation glue layer 8 is combined with the pole post 7, and the bottom of the isolation glue layer 8 is combined with the first protrusion 3 and a plurality of second protrusions 4, so that the pole post 7 is fixed to the first protrusion 3 and a plurality of second protrusions 4 through the isolation glue layer 8, thereby playing an anti-torsion role for the pole post 7.

[0045] It should be noted that the first protrusion 3 is arranged around the periphery of the mounting hole 2, and the projected shape of the first protrusion 3 on the surface of the top cover body 1 can be square, rounded rectangle, circular or other regular shapes, which are not limited in the embodiments of the present application.

[0046] Optionally, as Figures 1 to 4 shown, a plurality of second protrusions 4 are radially distributed in a radiation pattern along the first protrusion 3.

[0047] In the embodiments of the present application, by arranging a plurality of second protrusions 4 to be radially distributed in a radiation pattern along the first protrusion 3, in this way, during the injection molding process of the isolation glue layer 8, it is convenient for the isolation glue layer 8 to flow along the radiation direction of the second protrusions 4, so as to facilitate the uniform distribution of the isolation glue layer 8; at the same time, the bonding area between the isolation glue layer 8 and the second protrusions 4 can be increased, making the bonding between the isolation glue layer 8 and the second protrusions 4 tighter.

[0048] In some embodiments, when the first protrusion 3 is rectangular or quasi-rectangular, the second protrusions 4 are set to at least four, and at least four second protrusions 4 are respectively arranged at the four corners of the first protrusion 3; of course, a plurality of second protrusions 4 can also be arranged at the midpoints of the long sides or the short sides of the first protrusion 3, which are not limited in the embodiments of the present application.

[0049] Optionally, as Figure 1 and Figure 2 shown, one end of the second protrusion 4 is connected to the side of the first protrusion 3 facing away from the mounting hole 2, and the other end extends in a direction away from the mounting hole 2.

[0050] In the embodiments of the present application, by connecting one end of the second protrusion 4 to the side of the first protrusion 3 facing away from the mounting hole 2 and the other end extending in a direction away from the mounting hole 2, in this way, during the injection molding process of the isolation glue layer 8, it is convenient for the isolation glue layer 8 to flow along the direction of the second protrusion 4 away from the mounting hole 2, so as to facilitate the uniform distribution of the isolation glue layer 8; at the same time, the bonding area between the isolation glue layer 8 and the second protrusions 4 can be increased, making the bonding between the isolation glue layer 8 and the second protrusions 4 tighter.

[0051] Optionally, as Figure 3 and Figure 4 shown, one end of the second protrusion 4 is connected to the side of the first protrusion 3 facing the mounting hole 2, and the other end extends towards the mounting hole 2.

[0052] In the embodiments of the present application, by connecting one end of the second protrusion 4 to the side of the first protrusion 3 facing the mounting hole 2 and the other end extending towards the mounting hole 2, in this way, the space formed by the enclosure of the first protrusion 3 and the top cover body 1 can be fully utilized, which is beneficial to saving the amount of the isolation glue layer 8 and reducing costs.

[0053] In some embodiments, as Figure 3As shown, one end of the second protrusion 4 is connected to the side of the first protrusion 3 facing the mounting hole 2, and the other end extends towards the mounting hole 2, and the extended position does not exceed the edge position of the mounting hole 2.

[0054] Optionally, as Figure 5 and Figure 6 shown, it further includes a plurality of third protrusions 5; the plurality of third protrusions 5 are arranged on the side of the first protrusion 3 facing away from the top cover body 1 and are spaced along the circumferential direction of the first protrusion 3.

[0055] In the embodiment of the present application, by arranging the plurality of third protrusions 5 on the side of the first protrusion 3 facing away from the top cover body 1 and spacing them along the circumferential direction of the first protrusion 3. In this way, the third protrusions 5 and the first protrusion 3 cooperate with each other to facilitate enhancing the bonding force between the isolation adhesive layer 8 and the first protrusion 3, more effectively preventing the isolation adhesive layer 8 from rotating relative to the top cover, and avoiding affecting the performance of the terminal post 7.

[0056] In some embodiments, as Figures 1 to 4 shown, when the first protrusion 3 is a rounded rectangle or a rectangle, the plurality of second protrusions 4 can be arranged at the four corners of the first protrusion 3; as Figures 5 to 6 shown, at this time, the plurality of third protrusions 5 can be arranged at the midpoints of the four sides of the first protrusion 3.

[0057] It should be noted that the position and quantity of the third protrusions 5 can be selected according to actual needs, and the embodiment of the present application does not limit this here.

[0058] Optionally, as Figure 7 and Figure 8 shown, the first protrusion 3 includes a plurality of first sub - protrusions 31, and the plurality of first sub - protrusions 31 are spaced around the periphery of the mounting hole 2.

[0059] In the embodiment of the present application, by spacing the plurality of first sub - protrusions 31 around the periphery of the mounting hole 2, in this way, during the process of processing the isolation adhesive layer 8, it is convenient for the isolation adhesive material to flow on both the inner and outer sides of the annular first protrusion 3, so as to facilitate the uniform distribution of the isolation adhesive material on both the inner and outer sides of the first protrusion 3.

[0060] In some embodiments, when the isolation adhesive material is poured into the gap formed by the isolation adhesive layer mold and the first protrusion 3, the isolation adhesive material can flow in or out along the gap between the first sub - protrusions 31, so that the isolation adhesive material can cover the first sub - protrusions 31 faster, thus saving time.

[0061] Optionally, the mounting hole 2 has a radial direction X and an axial direction Y, the dimension of the first protrusion 3 along the radial direction X is L, and the dimension of the first protrusion 3 along the axial direction Y is H, satisfying: 0.05mm 2 ≤L * H≤5.00mm 2。

[0062] In the embodiment of the present application, by setting the dimension of the first protrusion 3 in the radial direction X as L and the dimension of the first protrusion 3 in the axial direction Y as H, and satisfying 0.05 mm 2 ≤ L * H ≤ 5.00 mm 2 。In this way, while taking into account the weight and cost of the first protrusion 3, the anti-torsion requirement of the terminal post 7 is satisfied at the same time.

[0063] Exemplarily, L * H can be set to 0.05 mm 2 、0.50 mm 2 、1.00 mm 2 、1.50 mm 2 、2.00 mm 2 、2.50 mm 2 、3.00 mm 2 、3.50 mm 2 、4.00 mm 2 、4.50 mm 2 、5.00 mm 2 or any value within the range between any two values.

[0064] It should be noted that, as Figures 11 to 12 shown, the radial direction of the mounting hole 2 is the X direction, and the axial direction of the mounting hole 2 is the Y direction.

[0065] In some embodiments, if L * H ≤ 0.05 mm 2 , the first protrusion 3 cannot play an anti-torsion role after being combined with the isolation glue layer 8 due to its too small height or thickness; if 5.00 mm 2 ≤ L * H, although the first protrusion 3 can play an anti-torsion role after being combined with the isolation glue layer 8, its weight is increased and the cost is improved at the same time.

[0066] In some embodiments, battery top cover assemblies 9 with different size parameters are selected to conduct anti-torsion strength tests on the terminal post 7. The specific anti-torsion test method is as follows: Mount and fix the battery top cover assembly 9 on the fixed seat of the torsion machine, sleuth the chuck of the torsion machine fixture on the terminal post 7, then set the test torsion and start the torsion machine to conduct the torsion test. After the torsion test is completed, conduct a helium leak test on the test sample. If the helium leak test passes and the appearance of the isolation glue layer 8 is intact, it is determined that the anti-torsion test of the battery top cover is qualified; otherwise, it is unqualified.

[0067] Among them, the helium detection test method is as follows: The test sample installed with the battery top cover assembly 9 is filled with helium, and then the helium detector switch is turned on for helium detection test. When the helium detection of the battery top cover assembly 9 is qualified, a green light will be on the display screen to show the word "qualified". When the top cover helium detection is unqualified, a red light will be on the display screen to show the word "unqualified". At this time, after the equipment detection is completed, it will automatically judge the defective position of the battery top cover assembly 9 and record the data of the defective position of the battery top cover assembly 9.

[0068] The specific principle of helium detection is as follows: The helium detector includes a helium ion source and an electron collector. When helium leaks from the test sample, the helium ion source injects helium ions into the air inside the helium detector. The helium ions collide with the electrons in the air, generating an ionization phenomenon, thus generating a large number of free electrons. These free electrons are collected by the electron collector and converted into electrical signals. The signal amplitude is proportional to the helium concentration inside the object under test. By measuring the magnitude of the electrical signal, it can be judged whether there is a leak in the object under test.

[0069] In some embodiments, the dimension L of the first protrusion 3 in the radial direction X and the dimension H in the axial direction Y can be measured using measuring tools such as vernier calipers or thickness gauges.

[0070] It should be noted that when the measured torsional strength M of the terminal post satisfies: M≥8N·m, it is judged as qualified in the test; when the measured torsional strength M of the terminal post <8N·m, it is judged as unqualified in the test.

[0071] The test results of the torsional strength of the terminal post 7 are shown in Table 1 below:

[0072] Table 1: Torsional Strength Test Table of Terminal Post

[0073]

[0074] From the test data of Embodiment 12 and Embodiment 13 in the above table, it can be seen that although the test results of the torsional strength M of the terminal posts in Embodiment 12 and Embodiment 13 are qualified, due to the value of H*L not meeting the requirements, the size of the first protrusion 3 is too large, increasing the cost.

[0075] From the test data of Embodiment 1 and Embodiment 2 in the above table, it can be seen that when H≤0.05mm, even if L satisfies 0.05mm≤L, but H*L is too small, which affects the torsional strength of the terminal post 7, making the torsional strength of the terminal post 7 not meet the requirements; similarly, as shown in Embodiment 9, when L≤0.05mm, even if H satisfies 0.05mm≤H, but H*L is too small, which affects the torsional strength of the terminal post 7, making the torsional strength of the terminal post 7 not meet the requirement of M≥8N·m.

[0076] To sum up, when 0.05mm2 ≤L*H≤5.00 mm 2 Only when the torsional strength of the terminal post 7 can meet the requirement of M≥8 N·m when 0.05 mm≤L≤3.00 mm and 0.05 mm≤H≤5.00 mm are satisfied.

[0077] In some other embodiments, such as Figures 11 to 13 As shown, the top cover body 1 has two relatively arranged long sides and short sides. The length of the long side of the top cover body 1 is A, and 100 mm<A<650 mm is satisfied; the length of the short side of the top cover body 1 is B, and 10 mm<B<100 mm is satisfied, and the preferred value is from 10 mm to 85 mm; the thickness of the top cover body 1 is C, and 1 mm<C<3 mm is satisfied, and the preferred value is from 1.4 mm to 2.6 mm; wherein, the ratio of the length B of the short side of the top cover body 1 to the length A of the long side of the top cover body 1 satisfies: 0.0153<B / A<1. In this way, by setting the value of B / A to satisfy 0.0153<B / A<1, it is convenient for the size of the top cover body 1 to match the size of the first protrusion 3 and the sizes of several second protrusions 4, so as to meet the torsional strength requirement of the terminal post 7.

[0078] Optionally, as Figures 11 to 13 As shown, the size L of the first protrusion 3 along the radial direction X of the mounting hole 2 satisfies: 0.05 mm≤L≤3.00 mm.

[0079] In the embodiments of the present application, by setting the size L of the first protrusion 3 along the radial direction, on the one hand, the torsional strength requirement of the terminal post 7 is met, and on the other hand, the cost is not increased due to too large a size.

[0080] Exemplarily, L can be set to any value such as 0.05 mm, 0.5 mm, 1.00 mm, 1.50 mm, 2.00 mm, 2.50 mm, 3.00 mm or the range between any two values.

[0081] Optionally, as Figures 11 to 13 As shown, the size H of the first protrusion 3 along the axial direction Y of the mounting hole 2 satisfies: 0.05 mm≤H≤5.00 mm.

[0082] In the embodiments of the present application, by setting the size H of the first protrusion 3 in the axial direction Y, on the one hand, the torsional strength requirement of the terminal post 7 is met, and on the other hand, the cost is not increased due to too large a size.

[0083] Exemplarily, L can be set to any value such as 0.05 mm, 0.5 mm, 1.00 mm, 1.50 mm, 2.00 mm, 2.50 mm, 3.00 mm, 3.50 mm, 4.00 mm, 4.50 mm, 5.00 mm or the range between any two values.

[0084] In some embodiments, when the first protrusion 3 is a rounded rectangle, the radius of the chamfers around the first protrusion 3 is F, satisfying 0 mm ≤ F ≤ 3 mm; the first protrusion 3 has two relatively arranged long sides and two relatively arranged short sides; the width of the short side of the first protrusion 3 is G, satisfying 0 mm < G < 50 mm; the width of the long side of the first protrusion 3 is E, satisfying 0 mm < E < 100 mm; in this way, by setting the width of the long side, the width of the short side, and the size of the chamfers of the first protrusion 3, it is convenient to adapt to the size of the dimension H of the first protrusion 3 along the axial direction Y and the dimension L along the radial direction, so as to meet the bonding force requirement between the first protrusion 3 and the isolation adhesive layer 8.

[0085] Optionally, as Figures 1 to 4 shown, the first protrusion 3 and the second protrusion 4 are integrally formed parts.

[0086] In the embodiments of the present application, by setting the first protrusion 3 and the second protrusion 4 as integrally formed parts, on the one hand, it is convenient to process the first protrusion 3 and the second protrusion 4. On the other hand, the connection strength between the first protrusion 3 and the second protrusion 4 can be increased, which helps to improve the bonding force between the isolation adhesive layer 8 and the entire protrusion structure.

[0087] In some embodiments, during processing, the top cover body 1, the first protrusion 3, and the second protrusion 4 can be processed simultaneously, so that the top cover body 1, the first protrusion 3, and the second protrusion 4 are integrally formed parts. In this way, it is convenient to enhance the connection strength between the first protrusion 3 and the top cover body 1, thereby improving the bonding force between the isolation adhesive layer 8 and the entire protrusion structure.

[0088] Optionally, as Figures 5 to 6 shown, the first protrusion 3 and the third protrusion 5 are integrally formed parts.

[0089] In the embodiments of the present application, by setting the first protrusion 3 and the third protrusion 5 as integrally formed parts, on the one hand, it is convenient to process the first protrusion 3 and the third protrusion 5. On the other hand, the connection strength between the first protrusion 3 and the third protrusion 5 can be enhanced, and further the bonding force between the isolation adhesive layer 8 and the third protrusion 5 can be enhanced.

[0090] In some embodiments, during processing, the top cover body 1, the first protrusion 3, the second protrusion 4, and the third protrusion 5 can be processed simultaneously, so that the top cover body 1, the first protrusion 3, the second protrusion 4, and the third protrusion 5 are integrally formed parts. In this way, it is convenient to increase the connection strength between the third protrusion 5 and the top cover body 1, thereby improving the bonding force between the isolation adhesive layer 8 and the first protrusion 3.

[0091] Second aspect, as Figures 1 to 14As shown in the figure, an embodiment of the present application provides a battery top cover assembly 9, including: a terminal post 7, an insulating glue layer 8, and a battery top cover 6 as described in any one of the above embodiments. The terminal post 7 passes through the mounting hole 2, the insulating glue layer 8 is disposed between the terminal post 7 and the top cover body 1, and at least a part of the first protrusion 3 and the second protrusion 4 is embedded in the insulating glue layer 8.

[0092] In the embodiment of the present application, by passing the terminal post 7 through the mounting hole 2, disposing the insulating glue layer 8 between the terminal post 7 and the top cover body 1, and at least a part of the first protrusion 3 and the second protrusion 4 is embedded in the insulating glue layer 8. In this way, by setting the second protrusion 4 to extend away from the first protrusion 3, the first protrusion 3 and the second protrusion 4 form a cross structure. Furthermore, when the insulating glue layer 8 is formed between the terminal post 7 and the top cover body 1, the cross structure can be embedded in the insulating glue layer 8 to form a limit fixation for the insulating glue layer 8, thereby effectively preventing the insulating glue layer 8 from rotating relative to the top cover body 1, and further avoiding affecting the performance of the terminal post 7.

[0093] In a third aspect, as Figures 1 to 15 shown in the figure, an embodiment of the present application provides a battery 11, including a battery top cover 6 as described in any one of the above embodiments, or including a battery top cover assembly 9 as described in the above embodiments.

[0094] In the embodiment of the present application, by providing a mounting hole 2 for passing the terminal post 7 in the top cover body 1, the first protrusion 3 is disposed around the periphery of the mounting hole 2, one end of a plurality of second protrusions 4 is connected to the first protrusion 3, and the other end extends away from the first protrusion 3. The first protrusion 3 and the second protrusion 4 are used for at least partially embedding in the insulating glue layer 8. In this way, by setting the second protrusion 4 to extend away from the first protrusion 3, the first protrusion 3 and the second protrusion 4 form a cross structure. Furthermore, when the insulating glue layer 8 is formed between the terminal post 7 and the top cover body 1, the cross structure can be embedded in the insulating glue layer 8 to form a limit fixation for the insulating glue layer 8, thereby effectively preventing the insulating glue layer 8 from rotating relative to the top cover body 1, and further avoiding affecting the performance of the terminal post 7.

[0095] In some embodiments, the battery 11 includes a housing 10, a plurality of battery cores, and a battery top cover assembly 9; the housing 10 has a receiving cavity, the plurality of battery cores are disposed in the receiving cavity, the terminal post 7 includes a positive terminal post and a negative terminal post, one end of the plurality of battery cores is electrically connected to the positive terminal post, the other end is electrically connected to the negative terminal post, and the battery top cover assembly 9 seals the opening of the receiving cavity.

[0096] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery top cover (6), characterized in that: It comprises a top cover body (1); The top cover body (1) is provided with a mounting hole (2) for inserting a pole (7); the top cover body (1) is provided with a first protrusion (3) and a plurality of second protrusions (4); the first protrusion (3) is arranged around the mounting hole (2); one end of the second protrusion (4) is connected to the first protrusion (3) and the other end extends in a direction away from the first protrusion (3); the first protrusion (3) and the second protrusion (4) are used to be at least partially embedded in the isolation rubber layer (8).

2. The battery cover (6) according to claim 1, characterized in that: A plurality of the second protrusions (4) are radially distributed along the radial direction of the first protrusion (3).

3. The battery cover (6) according to claim 1, characterized in that: One end of the second protrusion (4) is connected to a side of the first protrusion (3) facing away from the mounting hole (2), and the other end extends in a direction away from the mounting hole (2); or, one end of the second protrusion (4) is connected to a side of the first protrusion (3) facing toward the mounting hole (2), and the other end extends toward the mounting hole (2).

4. The battery top cover (6) according to any one of claims 1 to 3, characterized in that: It also comprises a plurality of third protrusions (5); the plurality of third protrusions (5) are arranged on a side of the first protrusion (3) away from the top cover body (1), and are arranged at intervals along the circumferential direction of the first protrusion (3).

5. The battery cover (6) according to claim 1, characterized in that: The first protrusion (3) comprises a plurality of first sub-protrusions (31), and the plurality of first sub-protrusions (31) are arranged at intervals around the mounting hole (2).

6. The battery cover (6) according to claim 1, characterized in that: The mounting hole (2) has a radial direction (X) and an axial direction (Y), the dimension of the first protrusion (3) along the radial direction (X) is L, and the dimension of the first protrusion (3) along the axial direction Y is H, satisfying: 0.05 mm 2 ≤L*H≤5.00mm 2 .

7. The battery cover (6) according to claim 6, characterized in that: The dimension L of the first protrusion (3) along the radial direction (X) satisfies: 0.05mm≤L≤3.00mm; and / or the dimension H of the first protrusion (3) along the axial direction (Y) satisfies: 0.05mm≤H≤5.00mm.

8. The battery cover (6) according to claim 4, characterized in that: The first protrusion (3) and the second protrusion (4) are integrally formed parts. And / or, the first protrusion (3) and the third protrusion (5) are an integrally formed part.

9. A battery top cover assembly (9), characterized in that: include: A pole (7), an isolating rubber layer (8), and a battery top cover (6) as claimed in any one of claims 1 to 8, wherein the pole (7) is passed through the mounting hole (2), the isolating rubber layer (8) is arranged between the pole (7) and the top cover body (1), and the first protrusion (3) and the second protrusion (4) are at least partially embedded in the isolating rubber layer (8).

10. A battery (11), characterized in that: It comprises the battery top cover (6) according to any one of claims 1 to 8, or it comprises the battery top cover assembly (9) according to claim 9.

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