Battery top cover and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery top cover and a battery, the battery top cover comprises a top cover body, a pole and a first insulating part, a first mounting hole is formed in the top cover body; the pole is arranged in the first mounting hole in a penetrating manner; a limiting groove is formed in the side wall of the top of the pole; a through hole is formed in the first insulating part, a boss extending from the periphery of the through hole to the center of the through hole is arranged on the periphery of the through hole, a clamping part is arranged at one end, deviating from the first insulating part, of the boss, the clamping part can deform relative to the first insulating part in the axial direction of the through hole, and the through hole is arranged on the pole in a sleeving manner; the clamping part deforms to avoid the pole so as to be sleeved with the pole, the clamping part recovers to the original shape when clamped in the limiting groove, and the bottom face of the first insulating part abuts against the top face of the top cover body. The battery top cover disclosed by the utility model solves the problem that the production cost of the battery top cover is high due to the adoption of an injection molding mode or an injection molding and welding combined mode for fixing the pole column.

Description

Technical Field

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

[0002] In the prior art, the battery top cover covers the opening at the top of the casing and generally includes a top cover body and two terminals. The two terminals are respectively inserted into the top cover body. The inner end of the terminal extends into the casing and connects with the battery cell inside the casing. The outer end of the terminal extends out of the top cover body and is used to connect with external components.

[0003] In existing battery top covers, the terminals are typically fixed to the top cover body using injection molding or a combination of injection molding and welding. However, fixing the terminals using injection molding or a combination of injection molding and welding requires adding injection molding and welding processes to the battery top cover production process. To ensure production efficiency, this necessitates a large number of injection molding and welding machines, increasing the production cost of the battery top cover.

[0004] Therefore, it is urgent to solve the problem of high production costs for battery top covers caused by using injection molding or a combination of injection molding and welding to fix the electrode posts. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a battery top cover and a battery, which solves the problem of high production costs for battery top covers caused by fixing the terminals using injection molding or a combination of injection molding and welding.

[0006] The technical effects to be achieved by this utility model are realized through the following aspects:

[0007] In a first aspect, this utility model provides a battery top cover, comprising:

[0008] The top cover body has a first mounting hole;

[0009] A pole post is inserted into the first mounting hole, and a limiting groove is formed on the side wall of the top of the pole post; and

[0010] The first insulating component has a through hole. A boss extending from the periphery of the through hole towards the center of the through hole is provided around the through hole. A snap-fit ​​part is provided at the end of the boss away from the first insulating component. The snap-fit ​​part can deform relative to the first insulating component along the axial direction of the through hole. The through hole is fitted onto the pole post. The snap-fit ​​part deforms to avoid the pole post and thus fits onto the pole post. When the snap-fit ​​part is engaged in the limiting groove, it returns to its original shape. The bottom surface of the first insulating component abuts against the top surface of the top cover body.

[0011] In some implementations, the limiting groove is an annular groove opened along the circumference of the pole post, and there are multiple protrusions. The multiple protrusions are spaced apart along the circumference of the through hole, and the snap-fit ​​portions of the multiple protrusions form a snap-fit ​​hole. The diameter of the snap-fit ​​hole is smaller than the diameter of the top of the pole post.

[0012] In this implementation, there is a certain gap between the bosses, which provides a certain deformation space for the locking part to avoid deformation. This avoids the locking parts squeezing each other when they undergo deformation, which would prevent them from deforming completely and thus affect the through hole for the pole post.

[0013] In some implementations, the angle formed between the extension direction of the boss and the axial direction of the through hole is an acute angle.

[0014] In some implementations, a protrusion is provided on the top surface of the top cover body near the first mounting hole. The top surface of the protrusion is an inclined surface, and the inclination direction of the inclined surface is parallel to the extension direction of the boss. The top surface of the protrusion is in contact with the bottom surface of the boss.

[0015] In some implementations, the end of the boss facing away from the first insulating member is further provided with an abutment surface that abuts against the side wall of the top of the pole post. The abutment surface forms a first anti-torsion structure, and the pole post is provided with a second anti-torsion structure that cooperates with the first anti-torsion structure on the side wall corresponding to the abutment surface.

[0016] In this implementation, the first anti-torsion structure and the second anti-torsion structure cooperate with each other to make the connection between the first insulator and the terminal more stable, thereby improving the anti-torsion performance between the first insulator and the terminal and preventing loosening between the first insulator and the terminal, which would cause the battery to malfunction.

[0017] In some implementations, the first anti-torsion structure is a first toothed structure, and the second anti-torsion structure is a second toothed structure that cooperates with the first toothed structure.

[0018] In some implementations, the bottom surface of the limiting groove is a non-rotating surface, and the snap-fit ​​part is provided with a snap-fit ​​surface, which is in contact with the bottom surface of the limiting groove.

[0019] In this implementation, the snap-fit ​​surface engages with the bottom surface of the limiting groove, making the connection between the first insulating component and the terminal post more stable. This further improves the anti-torsion performance between the terminal post and the first insulating component, preventing the terminal post and the first insulating component from becoming loose and causing the battery to malfunction.

[0020] In some implementations, a limiting recess is provided on the top surface of the top cover body near the first mounting hole for mounting the first insulating component. The bottom of the first insulating component is installed in the limiting recess, and the bottom surface of the first insulating component abuts against the bottom surface of the limiting recess.

[0021] In this implementation, the bottom surface of the first insulating member abuts against the limiting recess, so that when the first insulating member is installed on the battery top cover, the height of the first insulating member protruding from the top cover body can be reduced, thereby making the overall structure of the battery top cover more compact.

[0022] In some implementations, the bottom of the first insulating member is a non-rotating body, and the sidewall of the limiting platform is in contact with the sidewall of the bottom of the first insulating member.

[0023] In some implementations, an anti-rotation hole is provided on the top surface of the top cover body near the first mounting hole, and a snap-fit ​​post is provided on the bottom surface of the first insulating member to engage with the anti-rotation hole.

[0024] In this implementation, the connection between the first insulating component and the top cover body is made more stable, while the anti-torsion performance is improved, and loosening between the first insulating component and the top cover body is avoided.

[0025] In some implementations, the top surface of the pole post is provided with a threaded hole, which is used to connect to the busbar;

[0026] Alternatively, the top surface of the pole may be provided with a stud, which is used to connect to the busbar.

[0027] In some implementations, a sealing element and a second insulating element are also included. The top surface of the second insulating element abuts against the bottom surface of the top cover body. The second insulating element has a second mounting hole. The bottom of the pole post has a base plate. The pole post passes through the second mounting hole. The base plate abuts against the bottom surface of the second insulating element. The sealing element is sleeved on the pole post and abuts against the top cover body and the pole post.

[0028] Secondly, this utility model provides a battery, comprising:

[0029] The housing includes a receiving cavity with an opening;

[0030] Electrode assemblies are installed within the accommodating cavity; and

[0031] The battery top cover as described above; the battery top cover closes to the opening.

[0032] In summary, this utility model has at least the following advantages:

[0033] The battery top cover provided by this utility model features a protrusion around the through hole of the first insulating component. A deformable locking portion is located at the end of the protrusion facing away from the first insulating component. A limiting groove is formed on the side wall of the top of the terminal post. When the terminal post passes through the first mounting hole and the through hole sequentially, the locking portion deforms relative to the terminal post under the force of the terminal post's passage, allowing the terminal post to smoothly pass through the through hole and the locking portion to engage within the limiting groove. This achieves a stable connection between the terminal post, the top cover body, and the first insulating component. This solves the problem of high production costs for battery top covers caused by using injection molding or a combination of injection molding and welding to fix the terminal post. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the battery top cover in Example 1;

[0035] Figure 2 for Figure 1 The image shows an enlarged view of the battery top cover at point A.

[0036] Figure 3 for Figure 1 A cross-sectional view of the battery top cover is shown.

[0037] Figure 4 for Figure 1 The diagram shows the extension direction of the boss.

[0038] Figure 5 for Figure 1 The diagram shows the structure of the protrusion and boss.

[0039] Figure 6 for Figure 1 The diagram shows the structure of the first insulating component and the pole.

[0040] Figure 7 This is a schematic diagram of the battery top cover in Example 2;

[0041] Figure 8 for Figure 7 A schematic diagram of the snap-fit ​​post of the first insulating component shown;

[0042] Figure 9 This is an exploded view of the battery top cover of Example 2;

[0043] Figure 10 for Figure 9 A cross-sectional view of the battery top cover is shown.

[0044] Figure 11 This is a schematic diagram of the battery structure in Example 3.

[0045] Marked in the image:

[0046] 1. Battery top cover;

[0047] 10. Top cover body; 11. First mounting hole; 12. Limiting countersunk platform; 13. Protrusion; 14. Anti-rotation hole;

[0048] 20. Pole post; 21. Limiting groove; 22. Second anti-torsion structure; 23. Threaded hole; 24. Base plate;

[0049] 30. First insulating component; 31. Through hole; 32. Boss; 321. Snap-fit ​​part; 3211. Snap-fit ​​surface; 322. Abutment surface; 3221. First anti-torsion structure; 33. Snap-fit ​​hole; 34. Snap-fit ​​post;

[0050] 40. Seals;

[0051] 50. Second insulating component; 51. Second mounting hole;

[0052] 2. Battery;

[0053] 3. Shell;

[0054] 4. Electrode assembly. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this utility model, not all embodiments.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0057] Example 1:

[0058] Please see the appendix Figure 1 ~Appendix Figure 5 The battery top cover 1 of this utility model includes a top cover body 10, an electrode post 20 and a first insulating member 30.

[0059] In this regard, please combine Figure 1 , Figure 2 and Figure 3 , Figure 1 and Figure 3 The diagram illustrates the structural relationship between the top cover body 10, the pole post 20, and the first insulating member 30 in this embodiment of the invention. Figure 2 The diagram illustrates the specific structure of the first insulating member 30 and the pole post 20 in this embodiment of the present invention. Specifically,

[0060] The top cover body 10 has a first mounting hole 11; the pole post 20 passes through the first mounting hole 11, and a limiting groove 21 is formed on the side wall of the top of the pole post 20; the first insulating member 30 has a through hole 31, and a boss 32 extending from the periphery of the through hole 31 to the center of the through hole 31 is provided around the through hole 31. The end of the boss 32 facing away from the first insulating member 30 has a locking part 321. The locking part 321 can deform relative to the first insulating member 30 along the axial direction of the through hole 31. The through hole 31 is fitted onto the pole post 20. The locking part 321 deforms to avoid the pole post 20 and thus fits into the pole post 20. When the locking part 321 is locked in the limiting groove 21, it returns to its original shape. The bottom surface of the first insulating member 30 abuts against the top surface of the top cover body 10.

[0061] In this embodiment, the pole post 20 is sequentially inserted into the first mounting hole 11 and the through hole 31. When the pole post 20 passes through the through hole 31, the pole post 20 presses against the locking part 321 of the boss 32, causing the locking part 321 to undergo a clearance deformation relative to the pole post 20, so that the pole post 20 can pass smoothly through the through hole 31. The locking part 321 is locked in the limiting groove 21 opened on the side wall of the top of the pole post 20. When the locking part 321 is locked in the limiting groove 21, the locking part 321 releases the clearance deformation state, that is, the locking part 321 returns to its original shape.

[0062] Among them, from Figure 1 It can be seen that the pole post 20 is inserted into the through hole 31 from bottom to top, and the top of the pole post 20 refers to the part of the pole post 20 located above the top cover body 10 after passing through the through hole 31.

[0063] Furthermore, the locking portion 321 undergoes a deformation-avoiding mechanism. Due to its deformable design, during the insertion of the locking portion 321 into the electrode post 20, the top of the electrode post 20 forces the locking portion 321 to deform, creating space for the electrode post 20 to pass through. Typically, the direction of this deformation is opposite to the direction in which the first insulating member 30 is inserted into the electrode post 20.

[0064] When the snap-fit ​​part 321 snaps into the limiting groove 21, it is installed in place. Due to the function of the limiting groove 21, the snap-fit ​​part 321, which has been deformed, is provided with a reset space. The snap-fit ​​part 321 returns to its original shape and snaps into the limiting groove 21, so that the pole post 20, the top cover body 10 and the first insulating member 30 are securely snapped together.

[0065] It is understood that the first insulating component 30 can be a plastic part, and the boss 32 and the first insulating component 30 can be integrally formed by injection molding. The snap-fit ​​part 321 can be deformably connected to the end of the boss 32 away from the first insulating component 30. Preferably, the snap-fit ​​part 321 is a plastic part, and the snap-fit ​​part 321, the boss 32, and the first insulating component 30 can be integrally formed by injection molding. By pre-molding the first insulating component 30 and then assembling it with the other components to produce the battery top cover 1, production efficiency can be improved, and the costs incurred in the injection molding and welding processes during the production of the battery top cover 1 can be reduced.

[0066] The aforementioned battery top cover 1 features a protrusion 32 around the through hole 31 of the first insulating member 30. The end of the protrusion 32 facing away from the first insulating member 30 has a deformable locking portion 321. A limiting groove 21 is formed on the side wall of the top of the electrode post 20. When the electrode post 20 passes through the first mounting hole 11 and the through hole 31 in sequence, the locking portion 321 deforms relative to the electrode post 20 under the force of penetration, allowing the electrode post 20 to pass smoothly through the through hole 31 and the locking portion 321 to engage within the limiting groove 21. This achieves a stable connection between the electrode post 20, the top cover body 10, and the first insulating member 30. This solves the problem of high production costs for the battery top cover 1 caused by using injection molding or a combination of injection molding and welding to fix the electrode post 20.

[0067] Meanwhile, since the battery top cover 1 is assembled, the terminal post 20 can be welded to the connecting piece before assembly, which makes the battery production form more diversified and more adaptable to different battery production equipment.

[0068] In some other embodiments, the boss 32 is deformably connected to the periphery of the through hole 31 and extends toward the center of the through hole 31. The pole post 20 passes through the through hole 31 so that the boss 32 undergoes a clearance deformation relative to the pole post 20. The boss 32 causes the locking part 321 to undergo a clearance deformation relative to the pole post 20. After the pole post 20 passes through the through hole 31, the locking part 321 is locked in the limiting groove 21 opened on the side wall at the top of the pole post 20, so that the boss 32 and the locking part 321 are released from the clearance deformation state, that is, the boss 32 and the locking part 321 return to their original shape.

[0069] In some preferred embodiments, the limiting groove 21 is an annular groove opened circumferentially along the pole post 20. Multiple protrusions 32 are spaced apart circumferentially along the through hole 31. The engaging portions 321 of the multiple protrusions 32 form an engaging hole 33, the diameter of which is smaller than the diameter of the top of the pole post 20. The engaging portions 321 of the multiple protrusions 32 engage within the annular groove, making the connection between the engaging portions 321 and the pole post 20 more secure. The multiple protrusions 32 are spaced apart, with a certain gap between them, providing sufficient deformation space for the engaging portions 321 to undergo avoidance deformation. This avoids the problem of the engaging portions 321 squeezing each other during avoidance deformation, preventing incomplete deformation and thus affecting the pole post 20's passage through the through hole 31. In addition, the size of the gap between the bosses 32 can be set according to actual needs. Generally, the smaller the gap, the more helpful it is to form a stable engagement between the snap-fit ​​part 321 and the pole post 20.

[0070] It is understandable that multiple snap-fit ​​parts 321 can undergo avoidance deformation. The cooperation of multiple snap-fit ​​parts 321 can distribute the deformation when the pole post 20 is inserted. At the same time, after installation, they can work together to form a stable snap-fit ​​structure, further ensuring the service life and reliability of the snap-fit ​​parts 321.

[0071] Furthermore, the multiple protrusions 32 are evenly spaced, which allows the multiple locking parts 321 to evenly distribute the force generated when the pole post 20 passes through the through hole 31, making it easier for the pole post 20 to pass through the through hole 31, and at the same time improving the service life of the locking parts 321.

[0072] In some preferred embodiments, the extension direction of the boss 32 can be optimized to further improve the snap-fit ​​reliability of the first insulating member 30. See also... Figure 4 , Figure 4 The diagram illustrates the extending direction of the boss 32 in this embodiment of the invention. Specifically, direction a is the extending direction of the boss 32, and direction b is the axial direction of the through hole 31. In this embodiment, an angle R1 is formed between the extending direction of the boss 32 and the axial direction of the through hole 31. This angle R1 can be a right angle or an acute angle, preferably an acute angle.

[0073] When the included angle R1 is an acute angle, the formation of the included angle R1 will cause the end of the boss 32 with the snap-fit ​​part 321 to be raised relative to the plane where the through hole 31 is located. The snap-fit ​​part 321 is snapped into the limiting groove 21 of the pole post 20, forming a stronger supporting force on the pole post 20, making the connection between the first insulating member 30 and the pole post 20 more secure.

[0074] In some preferred embodiments, please refer to Figure 5 , Figure 5The diagram illustrates the structural relationship between the protrusion 13 and the boss 32 in this embodiment of the invention. Specifically, a protrusion 13 is provided on the top surface of the top cover body 10 near the first mounting hole 11. The top surface of the protrusion 13 is inclined, and the inclination direction of the inclined surface is parallel to the extension direction of the boss 32. The top surface of the protrusion 13 is in contact with the bottom surface of the boss 32. When the terminal post 20 is subjected to a downward thrust, the protrusion 13 abuts against the boss 32, preventing the boss 32 from deforming downward and improving the thrust resistance of the terminal post 20. Furthermore, since the boss 32 is in contact with the protrusion 13, the connection between the first insulating member 30 and the top cover body 10 is also made more secure, thereby making the overall structure of the battery top cover 1 more compact and stronger in integrity.

[0075] In some preferred embodiments, please refer to Figure 6 , Figure 6 The diagram illustrates the structural relationship between the boss 32 and the terminal post 20 in this embodiment of the invention. Specifically, the end of the boss 32 facing away from the first insulating member 30 is provided with an abutment surface 322 that abuts against the side wall of the top of the terminal post 20. The abutment surface 322 forms a first anti-torsion structure 3221, and the terminal post 20 has a second anti-torsion structure 22 on the side wall corresponding to the abutment surface 322 that cooperates with the first anti-torsion structure 3221. The first anti-torsion structure 3221 and the second anti-torsion structure 22 cooperate with each other, making the connection between the first insulating member 30 and the terminal post 20 more stable, thereby improving the anti-torsion performance between the first insulating member 30 and the terminal post 20 and preventing loosening between the first insulating member 30 and the terminal post 20, which would cause the battery to malfunction.

[0076] In some preferred embodiments, the first anti-torsion structure 3221 is a first toothed structure, and the second anti-torsion structure 22 is a second toothed structure that mates with the first toothed structure. The first toothed structure engages with the second toothed structure, improving the anti-torsion performance between the pole post 20 and the first insulating member 30, making the connection between the pole post 20 and the first insulating member 30 more stable, thereby preventing loosening between the pole post 20 and the first insulating member 30. In addition, the first anti-torsion structure 3221 and the second anti-torsion structure 22 can also be a combination of irregular surfaces, a combination of limiting hole posts, or a damping structure that can increase resistance, etc.

[0077] In some more preferred embodiments, the bottom surface of the limiting groove 21 is a non-rotating surface, preferably a plane parallel to the axial direction of the electrode post 20. The engaging portion 321 has an engaging surface 3211 that fits against the bottom surface of the limiting groove 21. The engagement surface 3211 and the bottom surface of the limiting groove 21 form an effective engagement, making the connection between the first insulating member 30 and the electrode post 20 more stable, further improving the anti-torsion performance between the electrode post 20 and the first insulating member 30, and preventing loosening between the electrode post 20 and the first insulating member 30, which could lead to the battery malfunctioning. It is understood that the bottom surface of the limiting groove 21 is not limited to a plane; it can also be a regular or irregular toothed structure, etc. These structures can also improve the anti-torsion performance between the electrode post 20 and the first insulating member 30 by providing an anti-torsion structure at the connection between the limiting groove 21 and the engaging surface 3211.

[0078] Example 2:

[0079] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the battery top cover 1 of this utility model. Please refer to the appendix. Figure 7 ~Appendix Figure 10 .

[0080] In this regard, please combine Figure 7 and Figure 8 , Figure 7 and Figure 8 The diagram illustrates the structural relationship between the limiting recess 12 and the first insulating member 30 in this embodiment of the present invention. Specifically, a limiting recess 12 for mounting the first insulating member 30 is provided on the top surface of the top cover body 10 near the first mounting hole 11. The bottom of the first insulating member 30 is installed in the limiting recess 12, and the bottom surface of the first insulating member 30 abuts against the bottom surface of the limiting recess 12.

[0081] In this embodiment, the bottom surface of the first insulating member 30 abuts against the bottom surface of the limiting platform 12. The limiting platform 12 limits the first insulating member 30, thereby reducing the height of the first insulating member 30 protruding from the top cover body 10 when the first insulating member 30 is installed on the battery top cover 1, thus making the overall structure of the battery top cover 1 more compact. Preferably, the protrusion 13 is provided on the bottom surface of the limiting platform 12.

[0082] In some preferred embodiments, the bottom of the first insulating member 30 is a non-rotating body, and the sidewall of the limiting recess 12 is in contact with the sidewall of the bottom of the first insulating member 30. The limiting recess 12 acts as a limiting element for the first insulating member 30, further improving the connection stability between the first insulating member 30 and the top cover body 10, and preventing problems such as torsion of the first insulating member 30 relative to the top cover body 10. In this embodiment, the bottom of the first insulating member 30 is a cuboid, and the limiting recess 12 is a square recess.

[0083] In some preferred embodiments, an anti-rotation hole 14 is provided on the top surface of the top cover body 10 near the first mounting hole 11, and a snap-fit ​​post 34 is provided on the bottom surface of the first insulating member 30 to engage with the anti-rotation hole 14. This makes the connection between the first insulating member 30 and the top cover body 10 more stable, improves the anti-torsion performance, and prevents loosening between the first insulating member 30 and the top cover body 10. Furthermore, it also makes the connection between the top cover body 10, the first insulating member 30, and the pole post 20 more stable, thereby improving the connection stability of the overall structure. Preferably, the bottom surface of the limiting countersunk platform 12 is provided with an anti-rotation hole 14 to make the anti-torsion performance of the first insulating member 30 stronger and the overall structure more compact.

[0084] Please see Figure 9 In some preferred embodiments, the top surface of the terminal post 20 is provided with a threaded hole 23 for connection to the busbar; or, the top surface of the terminal post 20 is provided with a stud for connection to the busbar. The terminal post 20 is electrically connected to the busbar through the threaded hole 23 or the stud, increasing the current-carrying area, which not only enhances the current transmission efficiency but also improves the current-carrying capacity between the terminal post 20 and the busbar, ensuring the stability and safety of the battery under high-voltage and high-current environments.

[0085] It is understandable that when the busbar is assembled and connected using threaded holes 23 or studs, the battery top cover 1 does not fix the terminal post 20 through a laser welding process. Therefore, the terminal post 20 is not affected by high temperature, which further expands the selection of materials for the first insulating component 30. For example, materials such as polyamide thermoplastic elastomer (TPAE), TPU / PC blend alloy TPU, fluorine-modified polyurethane (PU), and stabilized POM can all be used to make the first insulating component 30, reducing the manufacturing cost of the first insulating component 30, thereby reducing the production cost of the battery top cover 1, and further reducing the production cost of the battery.

[0086] In some more preferred embodiments, please refer to Figure 9 and Figure 10 , Figure 9 and Figure 10The diagram illustrates the structural relationship between the sealing element 40, the terminal post 20, and the top cover body 10 in this embodiment of the present invention; and the structural relationship between the terminal post 20, the second insulating element 50, and the top cover body 10. Specifically, the battery top cover 1 further includes a sealing element 40 and a second insulating element 50. The top surface of the second insulating element 50 abuts against the bottom surface of the top cover body 10. The second insulating element 50 has a second mounting hole 51. The bottom of the terminal post 20 has a base plate 24. The terminal post 20 passes through the second mounting hole 51, and the base plate 24 abuts against the bottom surface of the second insulating element 50. The sealing element 40 is sleeved on the terminal post 20 and abuts against the top cover body 10 and the terminal post 20. The sealing element 40 is preferably a rubber sealing ring. Firstly, the sealing element 40 ensures insulation between the terminal post 20 and the top cover body 10, preventing the top cover body 10 from becoming charged. Secondly, its elasticity ensures a tight seal between the terminal post 20 and the top cover body 10, thereby improving the reliability of the battery top cover 1. The snap-fit ​​part 321 has a certain degree of strength and can be snapped into the limiting groove 21 under the elastic force of the sealing element 40. The second insulating element 50 is preferably a plastic part. The base plate 24 abuts against the side of the second insulating element 50 facing away from the top cover body 10. Firstly, this ensures insulation between the base plate 24 and the top cover body 10. Secondly, it ensures a tight seal between the terminal post 20 and the top cover body 10. Simultaneously, it makes the overall structure of the battery top cover 1 more complete, thereby improving the reliability of the battery top cover 1.

[0087] Example 3:

[0088] This embodiment, based on the above embodiments, provides a battery 2. Please refer to the appendix. Figure 11 , Figure 11 The diagram illustrates the structural relationship between the housing 3, the electrode assembly 4, and the battery top cover 1 in this embodiment of the present invention.

[0089] A battery 2 includes a casing 3, an electrode assembly 4, and a battery top cover 1.

[0090] The housing 3 includes an accommodating cavity with an opening; the electrode assembly 4 is installed in the accommodating cavity; and the battery top cover 1 closes to the opening.

[0091] In this embodiment, the electrode assembly 4 is a cell formed by winding or stacking a separator, a positive electrode, and a negative electrode. The battery 2 described above can be a lithium-ion battery or a sodium-ion battery.

[0092] The battery of this invention features a protrusion 32 around the through hole 31 of the first insulating member 30. A deformable locking portion 321 is provided at the end of the protrusion 32 facing away from the first insulating member 30. A limiting groove 21 is formed on the side wall of the top of the electrode post 20. When the electrode post 20 passes through the first mounting hole 11 and the through hole 31 in sequence, the locking portion 321 deforms relative to the electrode post 20 under the force of penetration, allowing the electrode post 20 to pass smoothly through the through hole 31 and the locking portion 321 to engage within the limiting groove 21. This achieves a stable connection between the electrode post 20, the top cover body 10, and the first insulating member 30. This solves the problem of high production costs for the battery top cover 1 caused by using injection molding or a combination of injection molding and welding to fix the electrode post 20.

[0093] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0094] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0095] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0096] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0097] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A battery top cover characterized by, The utility model relates to a top cover body (10) is provided with first installation hole (11), and the first installation hole (11) is provided with the pole (20) in, and the pole (20) top side wall is provided with the limit slot (21) of the pole (20) top side wall, and the first insulating part (30) is provided with the through hole (31) of the first insulating part (30), and the through hole (31) periphery is provided with the boss (32) of the through hole (31) center extension from the through hole (31) periphery, and the boss (32) end away from the first insulating part (30) is provided with the clamping portion (321) of the boss (32) end away from the first insulating part (30), and the clamping portion (321) can be deformed along the axial direction of the through hole (31) relative to the first insulating part (30), and the through hole (31) is sleeved on the pole (20), and the clamping portion (321) is deformed to avoid the pole (20) and is sleeved on the pole (20), and the clamping portion (321) is clamped in the limit slot (21) and restores to the original shape, and the bottom surface of the first insulating part (30) and the top surface of the top cover body (10) are in contact. The limit slot (21) is a ring groove along the circumference of the pole (20), and the number of the bosses (32) is multiple, and the multiple bosses (32) are arranged at intervals along the circumference of the through hole (31), and the clamping portions (321) of the multiple bosses (32) surround a clamping hole (33), and the diameter of the clamping hole (33) is smaller than the diameter of the top of the pole (20). The extension direction of the boss (32) and the axial direction of the through hole (31) form an acute angle. The top surface of the convex portion (13) is an inclined surface, and the inclination direction of the inclined surface is parallel to the extension direction of the boss (32).

2. The battery header of claim 1, wherein, The end of the boss (32) away from the first insulating part (30) is further provided with an abutting surface (322) abutting against the side wall of the top of the pole (20), and the abutting surface (322) forms a first anti-twisting structure (3221), and the pole (20) is provided with a second anti-twisting structure (22) corresponding to the abutting surface (322).

3. The battery header of claim 1, wherein, The first anti-twisting structure (3221) is a first tooth-shaped structure, and the second anti-twisting structure (22) is a second tooth-shaped structure matched with the first tooth-shaped structure.

4. The battery header of claim 3, wherein, The bottom surface of the limit slot (21) is a non-rotational surface, and the clamping portion (321) is provided with a clamping surface (3211) abutting against the bottom surface of the limit slot (21).

5. The battery cover of claim 1, wherein, The top surface of the top cover body (10) is provided with a limit sink (12) near the first installation hole (11) for mounting the first insulating part (30), and the bottom of the first insulating part (30) is mounted in the limit sink (12), and the bottom surface of the first insulating part (30) abuts against the bottom surface of the limit sink (12).

6. The battery header of claim 5, wherein, ​ 7. The battery cover of claim 1, wherein, ​ 8. The battery cup of claim 1, wherein: ​ 9. The battery header of claim 8, wherein, The bottom of the first insulating piece (30) is a non-rotary body, and the sidewall of the limiting sunken table (12) is attached to the sidewall of the bottom of the first insulating piece (30).

10. The battery header of claim 1, wherein, The top surface of the top cover body (10) is provided with an anti-rotation hole (14) near the first mounting hole (11), and the bottom surface of the first insulating piece (30) is provided with a clamping column (34) matched with the anti-rotation hole (14).

11. The battery cup of claim 1, wherein: The top surface of the pole (20) is provided with a threaded hole (23) for connecting with a bus bar. Alternatively, the top surface of the pole (20) is provided with a threaded hole for connecting with a bus bar.

12. The battery header of claim 1, wherein, Further comprising a sealing piece (40) and a second insulating piece (50), the top surface of the second insulating piece (50) is attached to the bottom surface of the top cover body (10), the second insulating piece (50) is provided with a second mounting hole (51), the bottom of the pole (20) is provided with a bottom plate (24), the pole (20) is arranged in the second mounting hole (51), and the bottom plate (24) is attached to the bottom surface of the second insulating piece (50); the sealing piece (40) is sleeved on the pole (20) and is attached between the top cover body (10) and the pole (20).

13. A battery, characterized by It comprises: a shell (3) comprising a receiving cavity with an opening; an electrode assembly (4) installed in the receiving cavity; and a battery top cover (1) according to any one of claims 1-12, wherein the battery top cover (1) covers the opening. ​

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