A top cover assembly, a battery and an electric device

Abstract

The application provides a top cover assembly, a battery and an electric device. The top cover assembly comprises a cover plate and a sealing component. The cover plate is provided with a liquid injection hole. The sealing component comprises a sealing nail and an adhesive member. The adhesive member at least partially surrounds the outer circumferential side of the sealing nail. The adhesive member is adhesively fixed to the inner wall of the liquid injection hole, so that the sealing component seals the liquid injection hole. The top cover assembly has the advantages of good liquid injection hole sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a top cover assembly, a battery, and an electrical device. Background Technology

[0002] A battery typically consists of a casing, a core, and a top cover assembly. The core is housed within the casing, and the top cover assembly is connected to the casing to seal it. The top cover assembly is also electrically connected to the core to output electrical energy.

[0003] In related technologies, the top cover assembly is provided with an injection port for injecting electrolyte into the housing. After the electrolyte injection is completed, the injection port needs to be sealed by a sealing assembly. However, the sealing effect of the sealing assembly is poor. Utility Model Content

[0004] This application provides a top cover assembly, a battery, and an electrical device to improve the sealing effect of the injection port.

[0005] In a first aspect, embodiments of this application provide a top cover assembly, including:

[0006] A cover plate, wherein the cover plate is provided with an injection hole; and,

[0007] A sealing component, comprising a sealing pin and an adhesive element, wherein the adhesive element is at least partially surrounding the outer periphery of the sealing pin and is bonded to the inner wall of the injection hole so that the sealing component seals the injection hole.

[0008] In some embodiments, the outer peripheral surface of the sealing pin has a raised structure, and the adhesive covers the raised structure; and / or,

[0009] The adhesive is also at least partially disposed on the side of the sealing pin facing the battery core.

[0010] In some embodiments, the inner wall of the injection hole includes a stepped surface, the stepped surface facing away from the battery core;

[0011] The sealing nail includes a limiting part and a connecting part. The limiting part abuts against the stepped surface, and the connecting part protrudes from the limiting part on the side near the core. The adhesive at least partially surrounds the outer periphery of the connecting part.

[0012] In some embodiments, an overflow groove is provided between the stepped surface and the sealing member.

[0013] In some embodiments, the portion of the limiting part located on the outer periphery of the overflow groove is welded and fixed to the wall of the injection hole.

[0014] In some embodiments, the top cover assembly further includes a sealing cap that closes the opening at the end of the injection hole away from the core.

[0015] In some embodiments, the sealing cap is integrally formed with the limiting portion and covers the end face of the injection hole; or,

[0016] The sealing cap is spaced apart from the limiting part and covers the end face of the injection hole; or,

[0017] The sealing cap is engaged and fixed to the limiting part.

[0018] In some embodiments, at least one of the limiting portion and the sealing cap is welded to the cover plate.

[0019] Secondly, embodiments of this application also provide a battery, comprising:

[0020] A housing having a receiving cavity and an opening, the opening communicating with the receiving cavity;

[0021] Core, the core being disposed within the receiving cavity; and,

[0022] As described above, the top cover assembly is connected to the housing to close the opening.

[0023] Thirdly, embodiments of this application also provide an electrical device, including the battery as described above.

[0024] The beneficial effects of the embodiments of this application are as follows:

[0025] The sealing pin can be quickly and easily bonded to the wall of the injection hole using an adhesive. Furthermore, compared to bonding the sealing pin to one side of its end face, this embodiment of the application uses an adhesive that at least partially surrounds the outer periphery of the sealing pin. This allows for full utilization of a larger area of ​​the outer periphery of the sealing pin for bonding and fixing, thereby increasing the bonding area between the sealing pin and the wall of the injection hole, and thus improving the stability and reliability of the bonded sealing component when sealing the injection hole. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0028] Figure 1 A cross-sectional view of a battery provided in an embodiment of this application.

[0029] Figure 2 for Figure 1 The diagram shows the structure of the top cover assembly of the battery.

[0030] Figure 3 for Figure 1 A magnified view of the area at point X in the image.

[0031] Figure 4 for Figure 1 A schematic diagram of the second structure at point X.

[0032] Figure 5 for Figure 1 A schematic diagram of some parts of the top cover assembly is shown.

[0033] Figure 6 for Figure 5 A magnified view of the area at point Y.

[0034] Figure 7 for Figure 4 Exploded view of the sealing nails and adhesive components.

[0035] Figure 8 for Figure 1 A schematic diagram of the third structure at point X.

[0036] Figure 9 for Figure 1 A schematic diagram of the fourth structure at point X.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Shell;

[0039] 200. Roll core;

[0040] 300. Top cover assembly;

[0041] 31. Cover plate; 311. Injection hole; 312. First inner circumferential surface; 313. Stepped surface; 314. Second inner circumferential surface; 315. Outer surface; 316. Inner surface; 317. Vent gap; 318. Vent groove;

[0042] 32. Pole post;

[0043] 33. Current collector;

[0044] 34. Sealing component; 341. Adhesive component; 3411. First sealing part; 342. Sealing pin; 3421. Second sealing part; 3422. Glue overflow groove; 3423. Protruding structure; 3424. Limiting part; 3425. Connecting part;

[0045] 343. Sealing cap. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0047] Furthermore, in the embodiments of this application, "multiple" refers to two or more. Therefore, in the embodiments of this application, "multiple" can also be understood as "at least two". "At least one" can be understood as one or more, such as one, two, or more. For example, including at least one means including one, two, or more, and is not limited to which ones are included. For example, including at least one of A, B, and C, then it could include A, B, C, A and B, A and C, B and C, or A and B and C.

[0048] It should be noted that in this application, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the related objects before and after it are in an "or" relationship.

[0049] This application provides a top cover assembly, a battery, and an electrical device to improve the sealing effect of the injection port.

[0050] Before introducing the top cover assembly of the embodiments of this application, we will first give an overall introduction to the technical solution of this application in conjunction with the battery.

[0051] Batteries can be used in electrical devices. Electrical devices can include vehicles, such as cars, ships, and airplanes. Electrical devices can also include weighing scales, body fat scales, nutrition scales, body composition analyzers, charging devices, mobile terminals, and smart home devices, etc., but this application does not limit the scope of these devices.

[0052] Please refer to Figure 1The battery may include a housing 100, a winding core 200, and a top cover assembly 300. The housing 100 has a receiving cavity and an opening, with the opening communicating with the receiving cavity. The winding core 200 is disposed within the receiving cavity. The top cover assembly 300 is connected to the housing 100 to close the opening.

[0053] Furthermore, the core 200 can be inserted into the receiving cavity through the opening, and then the top cover assembly 300 can be connected to the housing 100 to close the opening. At the same time, the top cover assembly 300 can also be electrically connected to the core 200 for outputting electrical energy.

[0054] Please continue to refer to this. Figure 2 The top cover assembly 300 may include a cover plate 31, a terminal post 32, and a current collector 33. The cover plate 31 is connected to the housing 100 to close the opening. The current collector 33 is installed on the side of the cover plate 31 facing the receiving cavity. One end of the current collector 33 is electrically connected to the tab of the winding core 200. The terminal post 32 passes through the cover plate 31, and one end of the terminal post 32 near the receiving cavity is electrically connected to the other end of the current collector 33. Thus, the winding core 200 can output electrical energy to the outside through the current collector 33 and the terminal post 32 in sequence.

[0055] The cover plate 31 is provided with an injection hole 311. Therefore, after the cover plate 31 closes the opening, electrolyte can be injected into the receiving cavity through the injection hole 311. Correspondingly, the top cover assembly 300 may also include a sealing member 34. The sealing member 34 is used to close the injection hole 311. Therefore, after the electrolyte injection is completed, the injection hole 311 can be sealed by the sealing member 34.

[0056] In some embodiments, the sealing component 34 is bonded to the cover plate 31, and the sealing component 34 is also welded to the cover plate 31 to seal the injection hole 311.

[0057] That is, in some embodiments, the present application provides a top cover assembly 300, including a cover plate 31 and a sealing member 34. The cover plate 31 is provided with an injection hole 311, and the sealing member 34 is at least partially disposed in the injection hole 311. The sealing member 34 is bonded and fixed to the cover plate 31, and the sealing member 34 is also welded and fixed to the cover plate 31 to seal the injection hole 311.

[0058] Furthermore, the sealing component 34 and the cover plate 31 can be connected and fixed by both adhesive bonding and welding, thereby improving the stability and reliability of the connection between the sealing component 34 and the cover plate 31, and thus improving the sealing effect of the sealing component 34 on the injection hole 311.

[0059] Please continue to refer to this. Figure 3In some embodiments, the sealing member 34 may include a first sealing portion 3411 and a second sealing portion 3421. The second sealing portion 3421 is located on the side of the first sealing portion 3411 away from the battery core 200. Furthermore, along the axial direction of the injection hole 311, the sealing member 34 and the cover plate 31 form at least two seals (i.e., at the first sealing portion 3411 and the second sealing portion 3421) on the injection hole 311, thereby effectively improving the sealing effect of the injection hole 311 through the two seals.

[0060] Therefore, the first sealing part 3411 can be bonded and fixed to the cover plate 31, and the second sealing part 3421 can be welded and fixed to the cover plate 31.

[0061] Therefore, in the actual assembly process, the first sealing part 3411 can be bonded and fixed to the cover plate 31 first, and then the second sealing part 3421 can be welded and fixed to the cover plate 31. It can be understood that, compared with bonding and welding in the same area of ​​the sealing component 34, the embodiments of this application, by welding and bonding in different areas of the sealing component 34 (i.e., the first sealing part 3411 and the second sealing part 3421), can avoid damage to the bonding structure during the welding process, and can also avoid incomplete welding caused by the adhesive used for bonding. This can improve the stability and reliability of the installation of the sealing component 34, and ultimately improve the reliability of sealing the injection hole 311.

[0062] In some embodiments, the sealing component 34 may include an adhesive 341, which is bonded to the cover plate 31.

[0063] Therefore, at least a portion of the first sealing portion 3411 can be formed by the adhesive 341.

[0064] During the assembly process, the adhesive can first be molded into a semi-solid adhesive part 341 using a mold, then the adhesive part 341 can be inserted into the injection hole 311, and finally the adhesive part 341 can be cured so that the adhesive part 341 is completely cured and bonded to the inner wall of the injection hole 311, thereby sealing the injection hole 311.

[0065] The adhesive 341 may include epoxy resin adhesive, heat-sensitive adhesive, etc., and this application embodiment does not limit it.

[0066] In some embodiments, the inner wall of the injection hole 311 includes a first inner peripheral surface 312, which surrounds the outer peripheral surface of the first sealing part 3411 to be bonded and fixed to the outer peripheral surface of the first sealing part 3411.

[0067] Therefore, the first seal of the injection hole 311 can be achieved by the cooperation of the first inner circumferential surface 312 and the outer circumferential surface of the first sealing part 3411.

[0068] It should also be noted that, along the circumference of the injection hole 311, all areas of the first sealing part 3411 may be bonded and fixed to the first inner circumferential surface 312, or only a portion of the first sealing part 3411 may be bonded and fixed to the first inner circumferential surface 312. This application embodiment does not limit this.

[0069] When all areas of the first sealing part 3411 are bonded and fixed to the first inner circumferential surface 312 along the circumferential direction of the injection hole 311, the connection area between the first sealing part 3411 and the inner wall of the injection hole 311 can be increased, thereby improving the stability and reliability of the first sealing part 3411 in sealing the injection hole 311.

[0070] In some embodiments, an overflow groove 3422 may be provided between the sealing member 34 and the inner wall of the injection hole 311. The overflow groove 3422 is located on the side of the first sealing part 3411 near or away from the second sealing part 3421, or in other words, the overflow groove 3422 is located on the side of the first sealing part 3411 near or away from the core 200, so that adhesive can overflow from the first sealing part 3411 into the overflow groove 3422.

[0071] It is understandable that if an overflow groove 3422 is not provided between the inner wall of the sealing component 34 and the injection hole 311, the adhesive of the first sealing component 3411 may partially overflow to other areas during the process of the first sealing component 3411 being installed into the injection hole 311, thereby affecting the installation of other parts.

[0072] For example, during the actual assembly of the sealing component 34, the first sealing part 3411 is inserted into the injection hole 311 before the second sealing part 3421, and the first sealing part 3411 is inserted into the injection hole 311 from the end furthest from the second sealing part 3421. If an overflow groove 3422 is not provided between the sealing component 34 and the inner wall of the injection hole 311, during the insertion of the first sealing part 3411 into the injection hole 311, some of the adhesive from the first sealing part 3411 may overflow to the side of the first sealing part 3411 closest to the second sealing part 3421. This overflowing adhesive could prevent the second sealing part 3421 from being properly installed.

[0073] Therefore, the overflow groove 3422 can be located on the side of the first sealing part 3411 near the second sealing part 3421.

[0074] For example, the inner wall of the injection hole 311 includes a stepped surface 313, which faces away from the battery core 200.

[0075] Therefore, there is an overflow groove 3422 between the stepped surface 313 and the sealing member 34. Furthermore, during the process of inserting the first sealing part 3411 into the injection hole 311, some of the adhesive of the first sealing part 3411 can overflow along the first inner peripheral surface 312 and / or the surface of the sealing member 34 into the overflow groove 3422.

[0076] In some embodiments, the glue overflow groove 3422 may be at least partially formed in the sealing member 34.

[0077] Optionally, the overflow groove 3422 can also be provided on the wall of the injection hole 311 (such as the stepped surface 313), and this embodiment does not limit this.

[0078] In some embodiments, the cover plate 31 further includes an outer surface 315 facing away from the core 200, and the inner wall of the injection hole 311 further includes a second inner circumferential surface 314 and a stepped surface 313, with the second inner circumferential surface 314 connecting the outer surface 315 and the stepped surface 313. At least one of the outer surface 315, the second inner circumferential surface 314, and the stepped surface 313 is welded and fixed to the second sealing part 3421.

[0079] Therefore, by cooperating with the corresponding outer surface 315, the second inner circumferential surface 314, or the stepped surface 313, the second sealing of the injection hole 311 can be achieved.

[0080] It should also be noted that, along the circumference of the injection hole 311, all areas of the second sealing part 3421 may be welded and fixed to the corresponding outer surface 315, the second inner circumferential surface 314, or the stepped surface 313, or only a portion of the second sealing part 3421 may be welded and fixed to the corresponding outer surface 315, the second inner circumferential surface 314, or the stepped surface 313. This application embodiment does not limit this.

[0081] When all areas of the second sealing part 3421 are welded and fixed to the corresponding outer surface 315, second inner circumferential surface 314 or stepped surface 313 along the circumferential direction of the injection hole 311, the connection area between the second sealing part 3421 and the cover plate 31 can be increased, thereby improving the stability and reliability of the second sealing part 3421 in sealing the injection hole 311.

[0082] In some embodiments, the inner edge of the stepped surface 313 is connected to the side edge of the first inner circumferential surface 312 away from the core 200.

[0083] In some embodiments, the overflow groove 3422 surrounds the outer periphery of the first sealing part 3411, and the second sealing part 3421 is welded and fixed to the cover plate 31 on the outer periphery of the overflow groove 3422.

[0084] For example, the portion of the limiting part 3424 located on the outer periphery of the overflow groove 3422 (e.g., the peripheral edge of the limiting part 3424) can be welded and fixed to the wall of the injection hole 311.

[0085] Understandably, if welding is performed at the overflow groove 3422, on the one hand, the adhesive overflowing into the overflow groove 3422 may affect the reliability of the welding; on the other hand, the space at the overflow groove 3422 may also lead to a situation where there is a false weld between the sealing component 34 and the wall of the injection hole 311. Therefore, in this embodiment, the second sealing part 3421 is welded and fixed to the cover plate 31 on the outer periphery of the overflow groove 3422, which can improve the reliability of the welding of the second sealing part 3421, thereby improving the sealing effect of the sealing component 34 on the injection hole 311.

[0086] Please continue to refer to this. Figure 4 In some embodiments, the first sealing part 3411 is at least partially disposed in the injection hole 311, and a venting gap 317 is formed between the first sealing part 3411 and the inner peripheral surface of the injection hole 311. The venting gap 317 is used to connect to the inside of the battery casing 100. The second sealing part 3421 is located on the side of the first sealing part 3411 away from the battery core 200. The second sealing part 3421 is sealed to the cover plate 31 to seal the injection hole 311 and the venting gap 317.

[0087] That is, in some embodiments, this application also provides a top cover assembly 300, including a cover plate 31 and a sealing member 34. The cover plate 31 is provided with an injection hole 311. The sealing member 34 includes a first sealing part 3411 and a second sealing part 3421. The first sealing part 3411 is at least partially disposed in the injection hole 311, and a venting gap 317 is formed between the first sealing part 3411 and the inner peripheral surface of the injection hole 311. The venting gap 317 is used to communicate with the interior of the battery casing 100. The second sealing part 3421 is located on the side of the first sealing part 3411 away from the battery core 200. The second sealing part 3421 is sealed to the cover plate 31 to seal the injection hole 311 and the venting gap 317.

[0088] Understandably, the sealing component 34 primarily isolates the injection port 311 from the external environment through the second sealing part 3421, thus the sealing effect of the second sealing part 3421 is relatively important. However, taking the second sealing part 3421 as an example of sealing by welding, some pores may remain after welding, leading to a situation where there appears to be leakage at the second sealing part 3421, i.e., the second sealing part 3421 may have a false seal. Therefore, when the first sealing part 3411 completely seals the injection port 311 (i.e., no vent gap 317 is provided), it is impossible to detect whether the second sealing part 3421 has a false seal by detecting the gas inside the housing 100 from the injection port 311.

[0089] Based on this, in this embodiment of the application, if gas can be detected in the battery from the second sealing part 3421, it indicates that the second sealing part is not completely sealed, and if gas cannot be detected in the battery from the second sealing part 3421, it indicates that the second sealing part is completely sealed. In this way, the second sealing part can be tested after the second sealing part 3421 seals the injection hole 311 to ensure the reliability of the sealing of the second sealing part 3421, and ultimately improve the reliability of the sealing of the injection hole 311 by the sealing component 34.

[0090] Furthermore, since the first sealing part 3411 and the injection hole 311 form a venting gap 317, the first sealing part 3411 can also provide a certain degree of sealing effect for the injection hole 311, such as preventing large foreign objects from passing through the injection hole 311.

[0091] Please refer to this as well. Figure 4 , Figure 5 and Figure 6 In some embodiments, the inner wall of the injection hole 311 may be formed with a venting groove 318 to form at least a portion of the venting gap 317.

[0092] For example, the cover plate 31 includes an inner surface 316 facing the core 200. The inner wall of the injection hole 311 includes a first inner circumferential surface 312 connected to the inner surface 316, and a vent groove 318 is at least partially located on the first inner circumferential surface 312 for communication with the interior of the battery housing 100.

[0093] In some embodiments, the width of the venting groove 318 is greater than or equal to 0.1 mm. This ensures that the venting groove 318 has sufficient width to allow enough gas to pass through for detection.

[0094] In some embodiments, the width of the vent groove 318 is less than or equal to 0.3 mm. This reduces the risk of electrolyte leakage within the housing 100 along the vent groove 318.

[0095] For example, the width of the ventilation slot 318 can be 0.1 mm, 0.12 mm, 0.15 mm, 0.198 mm, 0.2 mm, 0.24 mm, 0.25 mm, 0.281 mm or 0.3 mm, and this application embodiment does not limit it.

[0096] It is understandable that, due to the surface tension of liquids, when the width of the venting groove 318 is less than or equal to 0.3 mm, the electrolyte will have difficulty entering the venting groove 318, thus achieving an excellent sealing and barrier effect on the electrolyte.

[0097] In some embodiments, the cross-section of the venting groove 318 is triangular, trapezoidal, or semi-circular, which makes the venting groove 318 easy to manufacture.

[0098] In some embodiments, the number of vent grooves 318 is one. This avoids the possibility that too many vent grooves 318 could affect the sealing effect at the first sealing part 3411.

[0099] Optionally, the number of venting grooves 318 is at least two, and the at least two venting grooves 318 are arranged at intervals along the circumference of the injection hole 311. This facilitates detection from multiple positions along the circumference of the injection hole 311, thereby improving the convenience of detection.

[0100] In some embodiments, the venting groove 318 may be disposed on the first inner circumferential surface 312.

[0101] Please continue to refer to this. Figure 4 and Figure 7 In some embodiments, the sealing member 34 may include a sealing pin 342. The sealing pin 342 is bonded to the cover plate 31 by an adhesive member 341.

[0102] For example, the adhesive 341 is at least partially surrounding the outer periphery of the sealing pin 342, and the adhesive 341 is bonded to the inner wall of the injection hole 311 so that the sealing member 34 seals the injection hole 311.

[0103] That is, in some embodiments, this application also provides a top cover assembly 300, including a cover plate 31 and a sealing member 34. The cover plate 31 is provided with an injection hole 311. The sealing member 34 includes a sealing pin 342 and an adhesive member 341, the adhesive member 341 at least partially surrounding the outer periphery of the sealing pin 342, and the adhesive member 341 is bonded and fixed to the inner wall of the injection hole 311, so that the sealing member 34 seals the injection hole 311.

[0104] Furthermore, the sealing pin 342 can be quickly and easily bonded to the wall of the injection hole 311 using the adhesive component 341. Based on this, compared to using the adhesive component 341 on one side of the sealing pin 342 for bonding and fixing, this embodiment of the application uses the adhesive component 341 to at least partially surround the outer periphery of the sealing pin 342. This allows for full utilization of more area on the outer periphery of the sealing pin 342 for bonding and fixing, thereby increasing the bonding area between the sealing pin 342 and the wall of the injection hole 311, and thus improving the stability and reliability of the bonded sealing component 34 when sealing the injection hole 311.

[0105] In some embodiments, the outer peripheral surface of the sealing pin 342 is provided with a raised structure 3423, and the adhesive 341 covers the raised structure 3423. Thus, the raised structure 3423 on the peripheral surface of the sealing pin 342 increases the bonding area between the sealing pin 342 and the adhesive 341, thereby allowing the sealing pin 342 to be more stably and reliably bonded and fixed to the injection hole 311, ultimately improving the stability and reliability of the sealing of the injection hole 311.

[0106] In some embodiments, the adhesive 341 is also at least partially disposed on the side of the sealing pin 342 facing the battery core 200. This increases the bonding area between the sealing pin 342 and the adhesive 341, thereby allowing the sealing pin 342 to be more stably and reliably bonded to the injection hole 311, ultimately improving the stability and reliability of the sealing of the injection hole 311.

[0107] In some embodiments, the sealing pin 342 includes a limiting portion 3424 and a connecting portion 3425. The limiting portion 3424 abuts against the stepped surface 313, and the connecting portion 3425 protrudes from the limiting portion 3424 on the side near the core 200. The adhesive member 341 at least partially surrounds the outer periphery of the connecting portion 3425. Furthermore, the limiting portion 3424 can control the position of the sealing pin 342 inserted into the injection hole 311, facilitating quick and easy installation of the sealing pin 342 and the adhesive member 341, thereby improving the assembly efficiency of the sealing component 34.

[0108] Correspondingly, the outer peripheral surface of the connecting portion 3425 may be provided with a protruding structure 3423. For example, the outer peripheral surface of the connecting portion 3425 may be provided with a periodic rib to form the protruding structure 3423.

[0109] Correspondingly, the adhesive 341 may also cover the end of the connecting portion 3425 that is away from the limiting portion 3424.

[0110] For example, the adhesive 341 can be sleeved on the end of the connecting portion 3425 away from the limiting portion 3424.

[0111] In the actual assembly process, a semi-solid adhesive 341 can be applied to the connecting part 3425 by dispensing glue. Then, the sealing nail 342 and the adhesive 341 are inserted into the injection hole 311 simultaneously. Finally, the semi-solid adhesive 341 is completely cured so that the sealing nail 342 is bonded and fixed to the hole wall of the injection hole 311 by the adhesive 341.

[0112] Optionally, the sealing pin 342 can be placed in the mold as an insert, thereby forming a semi-solid adhesive 341 on the connecting part 3425 through the mold; then, the sealing pin 342 and the adhesive 341 are inserted into the injection hole 311 simultaneously; finally, the semi-solid adhesive 341 is completely cured so that the sealing pin 342 is bonded and fixed to the hole wall of the injection hole 311 through the adhesive 341. This embodiment of the application does not limit this.

[0113] In some embodiments, the limiting part 3424 may be formed with an overflow groove 3422. Therefore, during the process of inserting the sealing pin 342 and the adhesive 341 into the injection hole 311, the adhesive 341 can easily overflow into the overflow groove 3422.

[0114] The glue overflow groove 3422 can be an annular groove. For example, the glue overflow groove 3422 is provided around the connecting portion 3425.

[0115] like Figure 4 As shown, in some embodiments, the top cover assembly 300 may further include a sealing cap 343, which closes the end opening of the injection hole 311 away from the core 200. Thus, the sealing cap 343 can enhance the sealing effect of the injection hole 311 by adding a seal to one part of the sealing member 34.

[0116] It should be noted that the sealing cap 343 closes the end opening of the injection hole 311 away from the core 200. The sealing cap 343 can be placed on the end face of the injection hole 311 or it can abut against the inner circumferential surface of the injection hole 311. This application embodiment does not limit this.

[0117] It should also be noted that the sealing cap 343 and the sealing nail 342 can be integrally formed or separately formed, and this application embodiment does not limit this.

[0118] For example, please continue to refer to Figure 8 The sealing cap 343 and the limiting part 3424 are integrally formed and cover the end face of the injection hole 311.

[0119] Therefore, during the assembly process, the sealing cap 343 and the sealing pin 342 can be assembled simultaneously to improve the assembly efficiency of the sealing component 34.

[0120] In some implementations, such as Figure 4 As shown, the sealing cap 343 and the limiting part 3424 are spaced apart and cover the end face of the injection hole 311.

[0121] Furthermore, since there is a gap between the sealing cap 343 and the limiting part 3424, in the actual assembly and subsequent use of the battery, even if one of the sealing pin 342 and the sealing cap 343 is not installed properly or is displaced, it is not easy to cause interference or damage to the other. This can improve the reliability of the sealing component 34 and ultimately improve the sealing effect of the injection hole 311.

[0122] In some implementations, please refer to [the documentation / reference]. Figure 9 The sealing cap 343 is snapped and fixed to the limiting part 3424.

[0123] Furthermore, the engagement between the sealing cover 343 and the limiting part 3424 can improve the stability and reliability of the installation of the sealing cover 343.

[0124] For example, the sealing cover 343 is provided with a slot, and the limiting part 3424 is snapped and fixed inside the sealing cover 343.

[0125] In some embodiments, at least one of the limiting part 3424 and the sealing cover 343 is welded to the cover plate 31. Therefore, welding can improve the reliability and stability of the installation of the corresponding sealing pin 342 and sealing cover 343.

[0126] In some embodiments, the sealing component 34 includes a metal part, which is welded to the cover plate 31.

[0127] Therefore, at least part of the second sealing portion 3421 can be formed from a metal part.

[0128] For example, the metal part may include a sealing pin 342, and thus may be a second sealing part 3421 provided on the sealing pin 342.

[0129] Optionally, the metal component may also include a sealing cap 343. Therefore, the sealing cap 343 may also have a second sealing part 3421.

[0130] The metal parts can be made of aluminum or any other metal material, and this application does not limit this.

[0131] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0132] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0133] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0134] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A top cover assembly (300), characterized in that, include: Cover plate (31), the cover plate (31) is provided with injection hole (311); and, A sealing component (34) includes a sealing pin (342) and an adhesive member (341), the adhesive member (341) being at least partially surrounding the outer periphery of the sealing pin (342) and being bonded to the inner wall of the injection hole (311) so that the sealing component (34) seals the injection hole (311).

2. The top cover assembly (300) according to claim 1, characterized in that, The outer peripheral surface of the sealing pin (342) is provided with a raised structure (3423), and the adhesive (341) covers the raised structure (3423); and / or, The adhesive (341) is also at least partially disposed on the side of the sealing pin (342) facing the battery core (200).

3. The top cover assembly (300) according to claim 1 or 2, characterized in that, The inner wall of the injection hole (311) includes a stepped surface (313) facing away from the battery core (200); The sealing nail (342) includes a limiting part (3424) and a connecting part (3425). The limiting part (3424) abuts against the stepped surface (313), and the connecting part (3425) protrudes from the limiting part (3424) on the side near the core (200). The adhesive (341) at least partially surrounds the outer periphery of the connecting part (3425).

4. The top cover assembly (300) according to claim 3, characterized in that, An overflow groove (3422) is provided between the stepped surface (313) and the sealing component (34).

5. The top cover assembly (300) according to claim 4, characterized in that, The portion of the limiting part (3424) located on the outer periphery of the overflow groove (3422) is welded and fixed to the wall of the injection hole (311).

6. The top cover assembly (300) according to claim 3, characterized in that, The top cover assembly (300) also includes a sealing cap (343) that closes the opening of the injection hole (311) away from the core (200).

7. The top cover assembly (300) according to claim 6, characterized in that, The sealing cap (343) is integrally formed with the limiting part (3424) and covers the end face of the injection hole (311); or, The sealing cap (343) is spaced apart from the limiting part (3424) and covers the end face of the injection hole (311); or, The sealing cap (343) is engaged and fixed with the limiting part (3424).

8. The top cover assembly (300) according to claim 6, characterized in that, At least one of the limiting part (3424) and the sealing cover (343) is welded and fixed to the cover plate (31).

9. A battery, characterized in that, include: The housing (100) is provided with a receiving cavity and an opening, the opening communicating with the receiving cavity; A core (200) disposed within the receiving cavity; and, The top cover assembly (300) as claimed in any one of claims 1 to 8, wherein the top cover assembly (300) is connected to the housing (100) to close the opening.

10. An electrical appliance, characterized in that, Includes the battery as described in claim 9.

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