Cap assembly, battery and battery pack

Abstract

The utility model provides a cap assembly, a battery and a battery pack, the cap assembly comprises a pore plate provided with pore plate pressure relief holes; the pore plate gasket is located on the pore plate, the pore plate gasket comprises a gasket main body part and a gasket edge part connected to the periphery of the gasket main body part, the gasket main body part is provided with a through hole and a gasket pressure relief hole, and the gasket pressure relief hole is communicated with the pore plate pressure relief hole; the anti-explosion piece is located on the pore plate gasket, and the anti-explosion piece is connected to the pore plate through the through hole; wherein the gasket edge part comprises a gasket edge part top end face and a gasket edge part bottom end face, and the gasket main body part comprises a gasket main body part upper end face and a gasket main body lower end face. The vertical distance d1 between the top end face of the gasket edge part and the bottom end face of the gasket edge part is larger than the vertical distance d2 between the upper end face of the gasket body part and the lower end face of the gasket body part.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a cap assembly, a battery, and a battery pack. Background Technology

[0002] The cap assembly of a cylindrical lithium-ion secondary battery includes an orifice plate, an orifice plate gasket, and an explosion-proof sheet, with the gasket positioned between the explosion-proof sheet and the orifice plate. In related technologies, the orifice plate gasket has a gasket pressure relief hole. The outer periphery of the orifice plate gasket includes a top surface connected to the edge portion of the explosion-proof sheet and a bottom surface connected to the edge portion of the orifice plate. The distance between the top and bottom surfaces of the edge portion is d11, and the distance between the two end faces of the main body where the gasket pressure relief hole is located is d12. Since d11 and d12 are essentially the same, when the explosion-proof sheet is flipped up, the wall thickness of the gasket edge portion outside the gasket pressure relief hole is relatively thin and easily breaks, causing the explosion-proof sheet and the orifice plate to reconnect after a short circuit, resulting in a battery short circuit. Utility Model Content

[0003] The present invention provides a cap assembly, a battery, and a battery pack, which can improve the technical problem of easy breakage of perforated plate gaskets.

[0004] In a first aspect, embodiments of the present invention provide a cap assembly, the cap assembly comprising:

[0005] The orifice plate is equipped with pressure relief holes.

[0006] An orifice plate gasket, located on the orifice plate, includes a gasket body and a gasket edge connected to the outer periphery of the gasket body. The gasket body has a through hole and a gasket pressure relief hole, the gasket pressure relief hole communicating with the orifice plate pressure relief hole; and

[0007] An explosion-proof plate is located on the perforated plate gasket and is connected to the perforated plate through the through hole.

[0008] The gasket edge portion includes a top surface and a bottom surface, and the gasket body portion includes an upper surface and a lower surface. The vertical distance d1 between the top surface and the bottom surface of the gasket edge portion is greater than the vertical distance d2 between the upper surface and the lower surface of the gasket body portion.

[0009] In one embodiment, the difference between d1 and d2 is 0.1 mm to 0.5 mm; and / or, d1 is 0.4 mm to 0.7 mm; and / or, d2 is 0.2 mm to 0.3 mm.

[0010] In one embodiment, the top surface of the gasket edge portion protrudes relative to the upper surface of the gasket body portion, and the bottom surface of the gasket edge portion protrudes relative to the lower surface of the gasket body portion.

[0011] In one embodiment, the gasket further includes a gasket connecting portion, which connects the edge portion of the gasket to the main body portion of the gasket. The gasket connecting portion includes an upper surface and a lower surface. The upper surface of the gasket connecting portion connects between the top surface of the edge portion of the gasket and the upper surface of the main body portion of the gasket, and the lower surface of the gasket connecting portion connects between the bottom surface of the edge portion of the gasket and the lower surface of the main body portion of the gasket, wherein the upper surface and the lower surface of the gasket connecting portion are inclined in opposite directions.

[0012] In one embodiment, the top surface of the gasket edge portion is parallel to the bottom surface of the gasket edge portion, the upper surface of the gasket body portion is parallel to the lower surface of the gasket body portion, and the angle between the upper surface of the gasket connecting portion and the upper surface of the gasket body portion is not less than 90° and less than 180°; and / or, the angle between the lower surface of the gasket connecting portion and the lower surface of the gasket body portion is not less than 90° and less than 180°.

[0013] In one embodiment, the vertical distance between the top surface of the edge portion of the gasket and the upper surface of the main body portion of the gasket is 0.15mm to 0.3mm.

[0014] In one embodiment, the vertical distance between the bottom end face of the edge portion of the gasket and the lower end face of the main body portion of the gasket is 0.01mm to 0.2mm.

[0015] In one embodiment, the perforated plate includes a main body portion and an edge portion connected to the outer periphery of the main body portion. The gasket main body portion is located above the main body portion of the perforated plate, and the gasket edge portion is located above the edge portion of the perforated plate. The perforated plate also includes a connecting portion, which connects the main body portion of the perforated plate and the edge portion of the perforated plate. The upper surface of the connecting portion is parallel to the lower surface of the gasket connecting portion.

[0016] In one embodiment, the pressure relief hole of the orifice plate is located on the main body of the orifice plate, and the main body of the orifice plate is also provided with an orifice plate welding part, and the explosion-proof sheet is welded to the orifice plate welding part.

[0017] In one embodiment, the edge portion of the perforated plate protrudes toward the side away from the explosion-proof sheet relative to the main body portion of the perforated plate, and the upper surface of the perforated plate connecting portion is inclined relative to the upper surface of the main body portion of the perforated plate.

[0018] In one embodiment, the top surface of the edge portion of the gasket protrudes relative to the upper surface of the main body portion of the gasket, and the bottom surface of the edge portion of the gasket is flush with the lower surface of the main body portion of the gasket.

[0019] Secondly, embodiments of the present invention provide a battery, the battery including a housing and a cap assembly connected to one end of the housing, the cap assembly being configured as described above.

[0020] Thirdly, embodiments of the present invention provide a battery pack, the battery pack including a housing and a plurality of batteries disposed within the housing, the batteries being configured as described above.

[0021] The beneficial effects of the embodiments of this utility model are as follows:

[0022] In an embodiment of this utility model, by setting the distance d1 between the top and bottom surfaces of the gasket edge of the perforated plate gasket of the cap assembly to be greater than the distance d2 between the upper and lower surfaces of the gasket body where the gasket pressure relief hole is located, the wall thickness of the gasket edge outside the gasket pressure relief hole is set to be greater than the wall thickness of the gasket body where the gasket pressure relief hole is located, thereby making the gasket edge outside the gasket pressure relief hole less prone to breakage. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of the cap assembly in the related technology;

[0025] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0026] Figure 3 This is a cross-sectional view of the cap assembly provided in Embodiment 1 of this utility model;

[0027] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0028] Figure 5 This is a cross-sectional view of the perforated plate gasket provided in Embodiment 1 of this utility model;

[0029] Figure 6 This is a cross-sectional view of the cap assembly provided in Embodiment 2 of this utility model;

[0030] Figure 7 yes Figure 6 A magnified view of a portion of the image;

[0031] Related technologies are shown in the attached diagrams:

[0032] 61. Explosion-proof sheet; 62. Orifice plate gasket; 621. Gasket pressure relief hole; 622. First outer surface; 623. Second outer surface; 63. Orifice plate;

[0033] This application includes the following icon numbers:

[0034] 10. Cap assembly;

[0035] 1. Top cover; 11. Top cover pressure relief hole;

[0036] 2. Explosion-proof disc; 21. Score; 22. Boss; 23. Explosion-proof disc connecting part; 24. Explosion-proof disc body part; 25. Explosion-proof disc edge part;

[0037] 3. Orifice plate gasket; 31. Gasket pressure relief hole; 32. Gasket edge; 321. Top surface of gasket edge; 322. Bottom surface of gasket edge; 33. Gasket connecting part; 331. Upper surface of gasket connecting part; 332. Lower surface of gasket connecting part; 34. Gasket body; 341. Upper surface of gasket body; 342. Lower surface of gasket body; 36. Through hole;

[0038] 4. Orifice plate; 41. Orifice plate pressure relief hole; 42. Orifice plate main body; 43. Orifice plate groove; 44. Orifice plate welded part; 45. Orifice plate edge; 46. Orifice plate connecting part;

[0039] 5. Insulating sleeve; Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, 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.

[0041] In related technologies, such as Figure 1 and Figure 2As shown, the cap assembly of a cylindrical lithium-ion secondary battery includes an explosion-proof sheet 61, a perforated plate gasket 62, and a perforated plate 63. The perforated plate gasket 62 is disposed between the explosion-proof sheet 61 and the perforated plate 63. The perforated plate gasket 62 has a gasket pressure relief hole 621. The perforated plate gasket 62 includes a top surface 622 of the gasket edge portion connected to the explosion-proof sheet 61 and a bottom surface 623 of the gasket edge portion connected to the perforated plate 63. The distance between the top surface 622 and the bottom surface 623 of the gasket edge portion is d11, and the distance between the two ends of the gasket body portion where the gasket pressure relief hole 621 is located is d12. d11 and d12 are essentially the same. When the explosion-proof sheet 61 is flipped up, the portion of the perforated plate gasket 62 located outside the gasket pressure relief hole 621 has a thinner wall thickness and is easily broken, causing the explosion-proof sheet and the perforated plate to reconnect after a circuit break, resulting in a battery short circuit.

[0042] The applicant found through measurement that the distance d12 between the two ends of the gasket body where the gasket pressure relief hole 621 is located is 0.2 mm, the distance d11 between the top end face 622 and the bottom end face 623 of the gasket edge is 0.2 mm, and the wall thickness of the perforated plate gasket 62 used to separate the explosion-proof plate 61 and the perforated plate 63 is basically the same as the wall thickness where the gasket pressure relief hole 621 is located.

[0043] In embodiments of this application, a cap assembly 10 is provided, such as... Figures 3 to 5 As shown, the cap assembly 10 includes a top cover 1, an explosion-proof sheet 2, a perforated plate gasket 3, a perforated plate 4, and an insulating sleeve 5. The top cover 1, the explosion-proof sheet 2, the perforated plate gasket 3, and the perforated plate 4 are stacked sequentially from top to bottom, and the top cover 1, the explosion-proof sheet 2, the perforated plate gasket 3, and the perforated plate 4 are all disposed inside the insulating sleeve 5.

[0044] The perforated plate gasket 3 has a through hole 36, and the explosion-proof plate 2 has a boss 22 protruding towards one side of the perforated plate 4 at its center. The boss 22 passes through the through hole 36 and is welded to the welding part 44 of the perforated plate.

[0045] The cap assembly 10 includes an explosion-proof structure, which includes multiple top cover pressure relief holes 11 disposed on the top cover 1, grooves 21 disposed on the explosion-proof sheet 2, multiple gasket pressure relief holes 31 disposed on the perforated plate gasket 3, and multiple perforated plate pressure relief holes 41 disposed on the perforated plate 4. The number of multiple top cover pressure relief holes 11 can be 3, and the number of multiple gasket pressure relief holes 31 and multiple perforated plate pressure relief holes 41 can be 2, 3, 4, or 5. The gasket pressure relief holes 31 and perforated plate pressure relief holes 41 can be oblong in shape. Each perforated plate pressure relief hole 41 and each gasket pressure relief hole 31 are configured to be at least partially opposite each other. The orthogonal projection of the grooves 21 on the explosion-proof sheet 2 onto the perforated plate gasket 3 is located within the gasket pressure relief hole 31. The high-pressure airflow generated inside the battery passes sequentially through the perforated plate pressure relief hole 41 and the gasket pressure relief hole 31 and acts on the explosion-proof sheet 2, causing the explosion-proof sheet 2 to flip towards the side closer to the top cover 1.

[0046] Continue to refer to Figure 3 and Figure 4 The perforated plate gasket 3 includes a gasket body 34 and a gasket edge 32. The gasket edge 32 is connected to the outer periphery of the gasket body 34. Multiple gasket pressure relief holes 31 and through holes 36 are provided on the gasket body 34, with the gasket pressure relief holes 31 located around the outer periphery of the through holes 36. The gasket body 34 includes an upper end face 341 and a lower end face 342 opposite to each other. The gasket edge 32 includes a top end face 321 and a bottom end face 322. The top end face 321 of the gasket edge is connected to the explosion-proof sheet 2, and the bottom end face 322 of the gasket edge is connected to the perforated plate 4. The gasket edge 32 serves to separate the explosion-proof sheet 2 and the perforated plate 4.

[0047] The vertical distance between the top surface 321 and the bottom surface 322 of the edge portion of the gasket is d1, and the vertical distance between the upper surface 341 and the lower surface 342 of the main body portion of the gasket is d2, with d1 being greater than d2.

[0048] Understandably, the vertical distance d1 between the top surface 321 and the bottom surface 322 of the gasket edge is equal to the wall thickness of the gasket edge 32, and the vertical distance d2 between the upper surface 341 and the lower surface 342 of the gasket body is equal to the wall thickness of the gasket body 34. Since the wall thickness of the gasket edge 32 is greater than the wall thickness of the gasket body 34, the gasket edge 32 is unlikely to be damaged by the pressure of the gasket 2 during the flipping process, which leads to the reconnection of the gasket 2 and the orifice plate 4 after the circuit is broken.

[0049] In some embodiments, d1 is 0.4mm to 0.7mm. In specific implementations, d1 can be 0.4mm, 0.43mm, 0.45mm, 0.48mm, 0.5mm, 0.53mm, 0.55mm, 0.58mm, 0.6mm, 0.63mm, 0.65mm, 0.68mm, 0.7mm, or any value between any two of the above, or a range between any two of the above values.

[0050] d2 is 0.2mm to 0.3mm. In specific implementations, d2 can be 0.2mm, 0.23mm, 0.25mm, 0.28mm, 0.3mm, or any value between any two of the above, or a range between any two of the above values.

[0051] The difference between d1 and d2 is 0.1mm to 0.5mm. In specific implementations, the difference between d1 and d2 can be 0.1mm, 0.13mm, 0.15mm, 0.18mm, 0.2mm, 0.23mm, 0.25mm, 0.28mm, 0.3mm, 0.33mm, 0.35mm, 0.38mm, 0.4mm, 0.43mm, 0.45mm, 0.48mm, 0.5mm, or any value between any two of the above, or a range between any two of the above values.

[0052] In one specific embodiment, when the distance d1 between the top surface 321 and the bottom surface 322 of the edge portion of the perforated plate gasket 32 ​​is set to 0.4 mm, and the distance d2 between the upper surface 341 and the lower surface 342 of the main body of the gasket is set to 0.2 mm, the difference between d1 and d2 is 0.2 mm. Through testing, it was found that after the battery was depressurized, the edge portion 32 of the perforated plate gasket 3 used to separate the explosion-proof sheet 2 and the perforated plate 4 was not damaged. When the distance d1 between the top surface 321 and the bottom surface 322 of the edge portion of the battery's perforated plate gasket 3 is set to 0.28 mm, and the distance d2 between the upper surface 341 and the lower surface 342 of the main body portion of the gasket is set to 0.2 mm, the difference between d1 and d2 is 0.08 mm. Through testing, it was found that after the battery was depressurized, the edge portion 32 of the perforated plate gasket 3, which is used to separate the explosion-proof sheet 2 and the perforated plate 4, was damaged, causing the circuit to be disconnected and then reconnected.

[0053] Understandably, if the difference between d1 and d2 is less than 0.1mm, when the explosion-proof sheet 2 is flipped, it will squeeze the perforated plate gasket 3, causing the edge 32 of the perforated plate gasket 3 used to separate the explosion-proof sheet 2 from the perforated plate 4 to break, resulting in the battery reconnecting after a circuit break. If the difference between d1 and d2 is greater than 0.5mm, it will cause the thickness of the perforated plate gasket 3 itself to be too thick, thereby increasing the overall height of the cap assembly 10, which is not conducive to improving the battery capacity.

[0054] Continue to refer to Figures 3 to 5 In some embodiments provided in this application, the top surface 321 of the gasket edge portion protrudes relative to the upper surface 341 of the gasket body portion, and / or the bottom surface 322 of the gasket edge portion protrudes relative to the lower surface 342 of the gasket body portion.

[0055] In one specific embodiment, the top surface 321 of the gasket edge protrudes relative to the upper surface 341 of the gasket body, and the bottom surface 322 of the gasket edge protrudes relative to the lower surface 342 of the gasket body. The gasket 3 also includes a gasket connecting portion 33 connecting the gasket edge 32 and the gasket body 34, the gasket connecting portion 33 including an upper surface 331 and a lower surface 332. The top surface 321 of the gasket edge portion and the bottom surface 322 of the gasket edge portion are arranged parallel to each other. The upper surface 341 of the gasket body portion and the lower surface 342 of the gasket body portion are arranged parallel to each other. The upper surface 331 of the gasket connecting portion connects the upper surface 341 of the gasket body portion and the top surface 321 of the gasket edge portion. The lower surface 332 of the gasket connecting portion connects the lower surface 342 of the gasket body portion and the bottom surface 322 of the gasket edge portion. Both the upper surface 331 and the lower surface 332 of the gasket connecting portion are set as inclined surfaces, and the upper surface 331 and the lower surface 332 of the gasket connecting portion are set to be inclined in different directions.

[0056] By setting the upper surface 331 and the lower surface 332 of the gasket connection part as inclined structures oriented in different directions, it is beneficial to increase the height difference between d1 and d2. In this way, while maintaining the wall thickness of the gasket body 34, the wall thickness of the gasket edge 32 is increased, thereby increasing the strength of the gasket edge 32 and effectively preventing the gasket edge 32 from being crushed by the explosion-proof sheet 2.

[0057] In some embodiments, continue to refer to Figure 3 and Figure 4 The included angle between the upper surface 331 of the gasket connecting part and the upper end face 341 of the gasket body part is not less than 90° and less than 180°. In specific implementations, the included angle between the upper surface 331 of the gasket connecting part and the upper end face 341 of the gasket body part is 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, or any two of the above values ​​or a range between any two of the above values.

[0058] The included angle between the lower surface 332 of the gasket connecting portion and the lower end face 342 of the gasket body portion is not less than 90° and less than 180°. In specific implementations, the included angle between the lower surface 332 of the gasket connecting portion and the lower end face 342 of the gasket body portion is 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, or any two of the above values, or a range between any two of the above values.

[0059] By setting the included angle between the upper surface 331 of the gasket connecting part and the upper end surface 341 of the gasket body part to not less than 90° and less than 180°, the upper surface 331 of the gasket connecting part is tilted upward. By setting the included angle between the lower surface 332 of the gasket connecting part and the lower end surface 342 of the gasket body part to not less than 90° and less than 180°, the lower surface 332 of the gasket connecting part is tilted downward, which helps to increase the distance d1 between the top end surface 321 of the gasket edge part and the bottom end surface 322 of the gasket edge part.

[0060] Continue to refer to Figure 3 and Figure 4 The distance d3 between the top surface 321 of the edge portion of the gasket and the upper surface 341 of the main body portion of the gasket is 0.15mm to 0.3mm. In specific implementations, d3 can be 0.15mm, 0.2mm, 0.22mm, 0.25mm, 0.28mm, 0.3mm, or any value between any two of the above, or a range between any two of the above values.

[0061] The distance d3 between the top surface 321 of the edge portion of the gasket and the upper surface 341 of the main body portion of the gasket is approximately equal to the thickness of the explosion-proof sheet 2. When d3 is less than 0.15mm, the explosion-proof sheet 2 will be too thin, which will prevent it from being stretched sufficiently and affect its explosion-proof performance. When d3 is greater than 0.3mm, the overall height of the explosion-proof sheet 2 and the perforated plate gasket 3 will be too high, which will increase the height of the cap assembly 10 and is not conducive to improving the battery capacity.

[0062] Continue to refer to Figure 3 and Figure 4 The distance d4 between the bottom end face 322 of the gasket edge and the bottom end face 342 of the gasket body is 0.01mm to 0.2mm. In specific implementations, d4 can be 0.03mm, 0.05mm, 0.08mm, 0.1mm, 0.13mm, 0.15mm, 0.18mm, 0.2mm, or any value between any two of the above, or a range between any two of the above values.

[0063] The distance d4 between the bottom end face 322 of the edge portion of the gasket and the bottom end face 342 of the main body portion of the gasket is approximately equal to the thickness of the perforated plate 4, and therefore d4 is set to be greater than 0.01 mm. When d4 is set to be greater than 0.2 mm, the overall height of the perforated plate gasket 3 and the perforated plate 4 will be too high, which will increase the height of the cap assembly 10 and is not conducive to improving the battery capacity.

[0064] Continue to refer to Figure 3 and Figure 4The orifice plate 4 includes an orifice plate body portion 42 and an orifice plate edge portion 45, with the orifice plate edge portion 45 connected to the outer periphery of the orifice plate body portion 42. The orifice plate welding portion 44 and the orifice plate pressure relief hole 41 are both located on the orifice plate body portion 42, the gasket body portion 34 is located on the orifice plate body portion 42, and the gasket edge portion 32 is located on the orifice plate edge portion 45.

[0065] The perforated plate 4 also includes a perforated plate connecting portion 46, which connects the main body portion 42 of the perforated plate and the edge portion 45 of the perforated plate. The upper surface of the perforated plate connecting portion 46 is parallel to the lower surface 332 of the gasket connecting portion. When the bottom end face 322 of the gasket edge portion protrudes relative to the lower end face 342 of the gasket main body portion, the edge portion 45 of the perforated plate protrudes downward relative to the main body portion 42 of the perforated plate. Correspondingly, the perforated plate connecting portion 46 is inclined downward, that is, the upper surface of the perforated plate connecting portion 46 is inclined relative to the lower surface of the main body portion 42 of the perforated plate.

[0066] The explosion-proof disc 2 includes a main body 24 and an edge 25. The edge 25 is connected to the outer periphery of the main body 24, and a notch 21 is provided on the main body 24. The main body 24 is located above the gasket body 34, and the edge 25 is located above the gasket edge 32.

[0067] The explosion-proof disc 2 also includes an explosion-proof disc connecting portion 23, which connects the explosion-proof disc body portion 24 and the explosion-proof disc edge portion 25. The lower surface of the explosion-proof disc connecting portion 23 is parallel to the upper surface 331 of the gasket connecting portion. When the top surface 321 of the gasket edge portion protrudes relative to the upper surface 341 of the gasket body portion, the explosion-proof disc edge portion 25 protrudes upward relative to the explosion-proof disc body portion 24, and correspondingly, the upper surface of the explosion-proof disc connecting portion 23 is inclined upward.

[0068] In yet another embodiment provided in this application, reference is made to Figure 6 and Figure 7 The top surface 321 of the edge portion of the perforated plate gasket protrudes relative to the upper surface 341 of the gasket body portion, and the bottom surface 322 of the edge portion of the gasket is flush with the lower surface 342 of the gasket body portion, thereby making d1 greater than d2. Correspondingly, the top surface of the edge portion 45 of the perforated plate is flush with the upper surface of the body portion 42 of the perforated plate.

[0069] Embodiments of this application also provide a battery, which can be a cylindrical lithium-ion battery or a cylindrical nickel-metal hydride battery. The battery includes a casing and a cap assembly, which can be the cap assembly provided in the above embodiments.

[0070] The embodiments of this application also provide a battery pack, which can be a power battery pack or an energy storage battery pack. The battery pack includes a housing and a plurality of batteries housed in the housing, including the batteries provided in the above embodiments.

[0071] 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 cap assembly, characterized by The gasket further comprises a gasket connecting portion connected between the gasket edge portion and the gasket main body portion, the gasket connecting portion comprises a gasket connecting portion upper surface and a gasket connecting portion lower surface, the gasket connecting portion upper surface is connected between the gasket edge portion top end surface and the gasket main body portion upper end surface, and the gasket connecting portion lower surface is connected between the gasket edge portion bottom end surface and the gasket main body portion lower end surface, wherein the gasket connecting portion upper surface and the gasket connecting portion lower surface are inclined towards opposite directions. The vertical distance between the gasket edge portion top end surface and the gasket main body portion upper end surface is 0.15mm-0.3mm. The vertical distance between the gasket edge portion bottom end surface and the gasket main body portion lower end surface is 0.01mm-0.2mm. The gasket further comprises a gasket connecting portion connected between the gasket edge portion and the gasket main body portion, the gasket connecting portion comprises a gasket connecting portion upper surface and a gasket connecting portion lower surface, the gasket connecting portion upper surface is connected between the gasket edge portion top end surface and the gasket main body portion upper end surface, and the gasket connecting portion lower surface is connected between the gasket edge portion bottom end surface and the gasket main body portion lower end surface, wherein the gasket connecting portion upper surface and the gasket connecting portion lower surface are inclined towards opposite directions. The vertical distance between the gasket edge portion top end surface and the gasket main body portion upper end surface is 0.15mm-0.3mm. The vertical distance between the gasket edge portion bottom end surface and the gasket main body portion lower end surface is 0.01mm-0.2mm.

2. The cap assembly of claim 1, wherein The gasket further comprises a gasket connecting portion connected between the gasket edge portion and the gasket main body portion, the gasket connecting portion comprises a gasket connecting portion upper surface and a gasket connecting portion lower surface, the gasket connecting portion upper surface is connected between the gasket edge portion top end surface and the gasket main body portion upper end surface, and the gasket connecting portion lower surface is connected between the gasket edge portion bottom end surface and the gasket main body portion lower end surface, wherein the gasket connecting portion upper surface and the gasket connecting portion lower surface are inclined towards opposite directions. The vertical distance between the gasket edge portion top end surface and the gasket main body portion upper end surface is 0.15mm-0.3mm. The vertical distance between the gasket edge portion bottom end surface and the gasket main body portion lower end surface is 0.01mm-0.2mm.

3. The cap assembly of claim 1, wherein The gasket further comprises a gasket connecting portion connected between the gasket edge portion and the gasket main body portion, the gasket connecting portion comprises a gasket connecting portion upper surface and a gasket connecting portion lower surface, the gasket connecting portion upper surface is connected between the gasket edge portion top end surface and the gasket main body portion upper end surface, and the gasket connecting portion lower surface is connected between the gasket edge portion bottom end surface and the gasket main body portion lower end surface, wherein the gasket connecting portion upper surface and the gasket connecting portion lower surface are inclined towards opposite directions.

4. The cap assembly of claim 3, wherein The vertical distance between the gasket edge portion top end surface and the gasket main body portion upper end surface is 0.15mm-0.3mm.

5. The cap assembly of claim 4, wherein, The vertical distance between the gasket edge portion bottom end surface and the gasket main body portion lower end surface is 0.01mm-0.2mm.

6. The cap assembly of claim 4, wherein The gasket further comprises a gasket connecting portion connected between the gasket edge portion and the gasket main body portion, the gasket connecting portion comprises a gasket connecting portion upper surface and a gasket connecting portion lower surface, the gasket connecting portion upper surface is connected between the gasket edge portion top end surface and the gasket main body portion upper end surface, and the gasket connecting portion lower surface is connected between the gasket edge portion bottom end surface and the gasket main body portion lower end surface, wherein the gasket connecting portion upper surface and the gasket connecting portion lower surface are inclined towards opposite directions.

7. The cap assembly of claim 4, wherein The vertical distance between the gasket edge portion top end surface and the gasket main body portion upper end surface is 0.15mm-0.3mm.

8. The cap assembly of claim 4, wherein, The vertical distance between the gasket edge portion bottom end surface and the gasket main body portion lower end surface is 0.01mm-0.2mm.

9. The cap assembly of claim 8, wherein, The gasket further comprises a gasket connecting portion connected between the gasket edge portion and the gasket main body portion, the gasket connecting portion comprises a gasket connecting portion upper surface and a gasket connecting portion lower surface, the gasket connecting portion upper surface is connected between the gasket edge portion top end surface and the gasket main body portion upper end surface, and the gasket connecting portion lower surface is connected between the gasket edge portion bottom end surface and the gasket main body portion lower end surface, wherein the gasket connecting portion upper surface and the gasket connecting portion lower surface are inclined towards opposite directions. The vertical distance between the gasket edge portion top end surface and the gasket main body portion upper end surface is 0.15mm-0.3mm. The vertical distance between the gasket edge portion bottom end surface and the gasket main body portion lower end surface is 0.01mm-0.2mm.

10. The cap assembly of claim 8, wherein, The hole plate edge part is protrudingly arranged relative to the hole plate main part towards a side away from the explosion-proof sheet, and the upper surface of the hole plate connecting part is obliquely arranged relative to the upper surface of the hole plate main part.

11. The cap assembly of claim 1, wherein, The gasket edge part top end surface is protrudingly arranged relative to the gasket main part upper end surface, and the gasket edge part bottom end surface is flush with the gasket main part lower end surface.

12. A battery, characterized by The battery comprises a shell and a cap assembly connected to one end of the shell, and the cap assembly is arranged as the cap assembly in any one of claims 1-11.

13. A battery pack, characterized by The battery pack comprises a box body and a plurality of batteries arranged in the box body, and the battery is arranged as the battery in claim 12. The battery comprises a shell and a cap assembly connected to one end of the shell, and the cap assembly is arranged as the cap assembly in any one of claims 1-11. The battery pack comprises a box body and a plurality of batteries arranged in the box body, and the battery is arranged as the battery in claim 12.

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