Battery cap and battery

Abstract

The embodiment of the utility model provides a battery cap and a battery. The battery cap comprises a riveting assembly, the riveting assembly comprises an anti-explosion piece and a connecting assembly, and the anti-explosion piece and the connecting assembly are in sealed connection through riveting; an upper cover and a lower cover, the upper cover is provided with a first through hole, the lower cover is provided with a second through hole, the upper cover and the lower cover are welded to form an accommodating space, the riveting assembly is arranged in the accommodating space, and the connecting assembly penetrates through the first through hole and the second through hole; the upper cover and the lower cover are respectively connected with the explosion-proof sheet in a sealing manner, and a tip part formed on the lower surface of the upper cover extends into the explosion-proof sheet.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and more specifically, relate to a battery cap and a battery. Background Art

[0002] With the rapid development of science and technology, battery technology, as the core power source of modern electronic devices, has always attracted much attention for its safety. During the use of the battery, a large amount of gas pressure may be generated due to internal chemical reactions or external factors. If this gas pressure cannot be released in a timely and effective manner, the battery may explode violently, posing a serious threat to people's lives and property safety.

[0003] In the prior art, common solutions to the problem of excessive internal gas pressure in batteries include designing a special pressure relief valve or using specific materials to absorb pressure. However, these methods often have some shortcomings. For example, the structure of the pressure relief valve is relatively complex and is prone to aging or failure during long-term use; and the material that absorbs pressure may be affected by factors such as ambient temperature and humidity, and its performance is not stable.

[0004] In view of this, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0005] The purpose of this application is to provide a battery cap and a new battery technology solution.

[0006] In a first aspect, the present application provides a battery cap. The battery cap comprises: a riveting assembly, the riveting assembly comprises an explosion-proof disc and a connecting assembly, the explosion-proof disc and the connecting assembly are sealed and connected by riveting;

[0007] An upper cover and a lower cover, wherein the upper cover is provided with a first through hole, and the lower cover is provided with a second through hole, the upper cover and the lower cover are welded to form an accommodation space, the riveting assembly is placed in the accommodation space, and the connecting assembly passes through the first through hole and the second through hole;

[0008] The upper cover and the lower cover are respectively sealed and connected to the explosion-proof disk, and the tip portion formed on the lower surface of the upper cover extends into the explosion-proof disk.

[0009] Optionally, the connection assembly includes a rivet and a riveting sheet, the explosion-proof sheet and the riveting sheet are sleeved on the rivet, and the explosion-proof sheet is located below the riveting sheet;

[0010] The rivet sheet, the explosion-proof disk and the rivet sheet are riveted so that the rivet sheet and the explosion-proof disk are sealed and connected, and the rivet is sealed and connected to the explosion-proof disk.

[0011] Optionally, a first sealing area is formed at a connection between the riveted sheet and the explosion-proof sheet, and the riveted sheet is deformed so that part of the riveted sheet fills the first sealing area.

[0012] Optionally, a second sealing area is formed at a connection between the rivet and the explosion-proof disk, and the rivet is deformed so that part of the rivet fills the second sealing area.

[0013] Optionally, the explosion-proof sheet is a plastic sheet.

[0014] Optionally, a diameter of the second through hole is smaller than a diameter of the first through hole.

[0015] Optionally, the upper cover comprises a first plane portion, a convex portion and a second plane portion, one end of the convex portion is connected to the first plane portion, and the other end of the convex portion is connected to the second plane portion;

[0016] The first plane portion is formed with the first through hole and the tip portion, and the first plane portion is sealingly connected to the explosion-proof disk.

[0017] Optionally, the second planar portion is welded to the lower cover.

[0018] In a second aspect, an embodiment of the present application further provides a battery, wherein the battery comprises the battery cap as described in the first aspect.

[0019] Optionally, when the internal air pressure of the battery exceeds a threshold value, the explosion-proof plate is torn along the thickness direction of the explosion-proof plate in the area where the tip portion extends, and the first through hole and the second through hole are connected to form a pressure relief channel.

[0020] According to an embodiment of the present application, a battery cap is provided. The battery cap realizes effective control of the internal gas pressure of the battery through the interaction between the riveting assembly and the upper cover and the lower cover. The battery cap can not only prevent the battery from exploding under high pressure, but also ensure that the chemical substances and gases inside the battery will not leak, thereby greatly improving the safety of the battery.

[0021] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0023] Figure 1 Shown is a schematic structural diagram of a battery cap provided in an embodiment of the present application.

[0024] Figure 2 Shown Figure 1 A magnified view of the structure in the middle.

[0025] Figure 3 Shown is a structural exploded view of a battery cap provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1. Riveting assembly; 10. Explosion-proof disk; 11. Connecting assembly; 111. Rivet; 112. Riveting sheet;

[0028] 2. upper cover; 20. first through hole; 21. first plane portion; 22. raised portion; 23. second plane portion; 24. pointed end portion;

[0029] 3. lower cover; 30. second through hole;

[0030] 41. First sealing area; 42. Second sealing area. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0033] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] The embodiment of the present application provides a battery cap. The battery cap realizes effective control of the internal gas pressure of the battery through the interaction between the riveting assembly 1 and the upper cover 2 and the lower cover 3. The battery cap can not only prevent the battery from exploding under high pressure, but also ensure that the chemical substances and gases inside the battery will not leak, thereby greatly improving the safety of the battery.

[0037] Reference Figure 1-Figure 3The battery cap comprises: a riveting assembly 1, wherein the riveting assembly 1 comprises an explosion-proof disc 10 and a connecting assembly 11, wherein the explosion-proof disc 10 and the connecting assembly 11 are sealed and connected by riveting;

[0038] An upper cover 2 and a lower cover 3, wherein the upper cover 2 is provided with a first through hole 20, and the lower cover 3 is provided with a second through hole 30, the upper cover 2 and the lower cover 3 are welded to form an accommodation space, the riveting assembly 1 is placed in the accommodation space, and the connecting assembly 11 passes through the first through hole 20 and the second through hole 30;

[0039] The upper cover 2 and the lower cover 3 are respectively sealed and connected to the explosion-proof disk 10 , and a tip portion 24 formed on the lower surface of the upper cover 2 extends into the explosion-proof disk 10 .

[0040] In an embodiment of the present application, a battery cap is provided, and the battery cap is designed to improve the safety of the battery, especially to cope with the excessive gas pressure that may be generated inside the battery.

[0041] The battery cap includes a riveted assembly 1, which is composed of an explosion-proof disc 10 and a connecting assembly 11. As a key safety element, the explosion-proof disc 10 is designed to rupture when the internal air pressure of the battery exceeds a certain threshold, thereby releasing pressure and preventing the battery from exploding. The connecting assembly 11 is connected to the explosion-proof disc 10 by riveting to ensure a sealed and firm connection between them. This riveted structure not only ensures the stability between the components, but also helps to improve the sealing performance of the entire battery cap.

[0042] The battery cap also includes two main parts, an upper cover 2 and a lower cover 3. The upper cover 2 is provided with a first through hole 20, and the lower cover 3 is provided with a second through hole 30. The two cover parts are tightly combined by welding to form an accommodation space, which is used to accommodate the riveting assembly 1. When the riveting assembly 1 is placed in the accommodation space, the connecting assembly 11 passes through the two through holes, further enhancing the overall structural stability of the battery cap.

[0043] When the riveted assembly 1 is placed in the accommodation space, the upper cover 2 and the lower cover 3 are sealed with the explosion-proof plate 10. This sealed connection design can effectively prevent the leakage of chemicals or gases inside the battery, further improving the safety of the battery. Figure 1 and Figure 2 The lower surface of the upper cover 2 is formed with a tip portion 24, which extends into the explosion-proof disc 10. Such a design helps the tip portion 24 to act more effectively on the explosion-proof disc 10 when the internal gas pressure of the battery increases, causing the explosion-proof disc 10 to rupture when the predetermined pressure is reached, thereby achieving rapid pressure relief.

[0044] Specifically, the battery cap is used in the battery. When the internal air pressure of the battery exceeds a certain threshold, misaligned shearing can occur between the explosion-proof plate 10 and the upper cover 2 and / or the lower cover 3 (the materials of the explosion-proof plate 10 and the cover (upper cover 2 and lower cover 3) are different), and stress concentration is easily generated at the tip 24 of the upper cover 2, thereby making it easier to achieve pressure relief and avoid explosion inside the battery.

[0045] Therefore, in the embodiment of the present application, the battery cap includes a riveting assembly 1, an upper cover 2 and a lower cover 3, the riveting assembly 1 is an integrally sealed component, the riveting assembly 1 is combined with the upper cover 2 and the lower cover 3, the upper cover 2 and the lower cover 3 are respectively sealed and connected with the explosion-proof plate 10, so that the battery cap as a whole is a component with strong sealing performance, which can ensure that the chemical substances and gases inside the battery will not leak, thereby greatly improving the safety of the battery. In addition, the tip 24 formed on the lower surface of the upper cover 2 extends into the explosion-proof plate 10, combined with the misaligned shear between the explosion-proof plate 10 and the cover, to achieve effective control of the internal gas pressure of the battery. When the internal gas pressure of the battery exceeds a certain threshold, it is easier to achieve the rupture of the explosion-proof plate 10, which helps to achieve pressure relief.

[0046] In an optional embodiment, the tip portion 24 on the lower surface of the upper cover 2 can be formed by setting the tip portion 24 on the lower surface of the upper cover 2, or by pressing a local area of ​​the upper cover 2 to form the tip portion 24 on the lower surface of the upper cover 2 when the upper cover 2 and the lower cover 3 are respectively sealed and connected to the explosion-proof disk 10.

[0047] In one embodiment, referring to Figure 1 and Figure 3 , the connection assembly 11 includes a rivet 111 and a riveting sheet 112, the explosion-proof disc 10 and the riveting sheet 112 are sleeved on the rivet 111 and the explosion-proof disc 10 is located below the riveting sheet 112;

[0048] The rivet sheet 112 , the explosion-proof disc 10 and the rivet sheet 112 are riveted so that the rivet sheet 112 and the explosion-proof disc 10 are sealed and connected, and the rivet 111 and the explosion-proof disc 10 are sealed and connected.

[0049] In this embodiment, the riveting assembly 1 includes a rivet 111, a riveting plate 112 and an explosion-proof plate 10. These components jointly realize the safety function of the battery cap through a specific combination and connection method.

[0050] The rivet 111 serves as the main body of the connection and plays a role of fixing and supporting. The explosion-proof disc 10 and the riveted sheet 112 are both designed to be sleeved on the rivet 111, wherein the explosion-proof disc 10 is located below the riveted sheet 112. This structural arrangement enables the explosion-proof disc 10 and the riveted sheet 112 to tightly surround the rivet 111 to form a stable connection. For example, the explosion-proof disc 10 can be sleeved on the rivet 111 first, and then the riveted sheet 112 can be sleeved on the rivet 111.

[0051] Specifically, through the riveting process, the riveting sheet 112 and the explosion-proof disk 10 are firmly connected together, and the rivet 111 also forms a sealed connection with the explosion-proof disk 10. This connection method not only ensures the stability and reliability between the components, but also enhances the overall sealing performance of the battery cap.

[0052] In this embodiment, the characteristics of the riveting process and the characteristics of different materials are fully utilized to achieve the safety performance of the battery cap under high pressure environment. When the internal pressure of the battery increases, the explosion-proof disk 10 can maintain a stable shape and structure under the support of the rivet 111 and the riveting sheet 112, ensuring that it can be accurately and effectively ruptured when the predetermined pressure is reached, thereby achieving safe pressure relief.

[0053] It should be noted that the three components of the rivet 111, the explosion-proof disc 10 and the riveted sheet 112 are riveted together, and the deformation of the rivet 111 itself will also cause the rivet 111 to be sealed and connected to the upper surface of the riveted sheet 112. In this way, the upper surface of the riveted sheet 112 is sealed and connected to the rivet 111, the lower surface of the riveted sheet 112 is sealed and connected to the upper surface of the explosion-proof disc 10, the lower surface of the explosion-proof disc 10 is sealed and connected to the rivet 111, and the various components in the riveted assembly 1 are sealed and connected, which helps to improve the sealing performance of the entire battery cap.

[0054] In one embodiment, referring to Figure 1 The connection between the rivet sheet 112 and the explosion-proof sheet 10 forms a first sealing area 41 , and the rivet sheet 112 is deformed so that part of the rivet sheet 112 fills the first sealing area 41 .

[0055] In this embodiment, the riveted sheet 112 and the explosion-proof disk 10 are tightly combined together by riveting during the connection process. At the connection, due to the riveting force, the riveted sheet 112 will produce a certain deformation. This deformation not only enhances the connection strength between the riveted sheet 112 and the explosion-proof disk 10, but more importantly, it enables part of the riveted sheet 112 to fill the small gap formed at the connection, thereby forming a tight sealing structure, namely the first sealing area 41.

[0056] The formation of the first sealing area 41 can effectively prevent the chemical substances or gases inside the battery from leaking out through the gaps at the connection, thereby ensuring the safety and stability of the battery. At the same time, due to the deformation filling effect of the rivet sheet 112, the sealing effect of the first sealing area 41 is more reliable and durable, and can maintain stable performance during long-term use.

[0057] When the internal pressure of the battery increases, the first sealing area 41 can withstand a certain pressure to prevent the sealing failure caused by the pressure. At the same time, the design of the explosion-proof disc 10 can also achieve safe pressure relief under high pressure to ensure the safe operation of the battery.

[0058] In one embodiment, referring to Figure 1 The connection between the rivet 111 and the explosion-proof disk 10 forms a second sealing area 42 , and the rivet 111 is deformed so that part of the rivet 111 fills the second sealing area 42 .

[0059] In this embodiment, when the rivet 111 is riveted to the bursting disk 10, the rivet 111 will deform under the impact and pressure of the riveting tool. This deformation not only ensures a firm connection between the rivet 111 and the bursting disk 10, but more importantly, it enables part of the rivet 111 and part of the material to fill the tiny gap formed at the connection, thereby forming a second sealing area 42.

[0060] The formation of the second sealing area 42 can effectively prevent the chemical substances or gases inside the battery from leaking out through the gap between the rivet 111 and the explosion-proof disk 10, further enhancing the safety of the battery. At the same time, due to the deformation filling effect of the rivet 111, the sealing effect of the second sealing area 42 is more reliable and durable, and can maintain stable performance during long-term use.

[0061] When the internal pressure of the battery increases, the second sealing area 42 can withstand a certain pressure to prevent the sealing failure caused by the pressure. At the same time, the design of the explosion-proof disc 10 can also achieve safe pressure relief under high pressure to ensure the safe operation of the battery.

[0062] In one embodiment, the explosion-proof disk 10 is a plastic disk.

[0063] In this embodiment, the explosion-proof sheet 10 is designed as a plastic sheet. When the explosion-proof sheet 10 is sealed and connected to the upper cover 2 and the explosion-proof sheet 10 is sealed and connected to the lower cover 3, the upper cover 2 and the lower cover 3 are both metal parts. The plastic is ruptured by the dislocation shearing between the plastic and the metal parts to achieve pressure relief, prevent violent explosions, and ensure the safety of the battery. The core of the dislocation shearing lies in the interface design between the plastic and the metal parts. When the internal air pressure of the battery gradually increases, the stress on these interfaces will also increase accordingly. Due to the differences in the physical properties of plastics and metals, such as elastic modulus, thermal expansion coefficient, etc., they will produce different deformations when subjected to the same stress. This deformation difference leads to dislocation on the interface. When the dislocation reaches a certain degree, the plastic will be sheared and damaged, forming cracks, thereby releasing the pressure inside the battery.

[0064] In one embodiment, referring to Figure 1 , the aperture of the second through hole 30 is smaller than the aperture of the first through hole 20 .

[0065] In this embodiment, this design can optimize the sealing performance of the battery cap. Since the aperture of the second through hole 30 is small, the contact area between the explosion-proof disc 10 and the lower cover 3 is relatively increased, thereby improving the sealing effect between the explosion-proof disc 10 and the lower cover 3. This helps prevent the chemical substances or gases inside the battery from leaking out through the through hole, further enhancing the safety of the battery.

[0066] In one embodiment, referring to Figure 1 and Figure 3 The upper cover 2 includes a first plane portion 21, a convex portion 22 and a second plane portion 23, one end of the convex portion 22 is connected to the first plane portion 21, and the other end of the convex portion 22 is connected to the second plane portion 23;

[0067] The first plane portion 21 is formed with the first through hole 20 and the tip portion 24 , and the first plane portion 21 is sealed and connected to the explosion-proof disk 10 .

[0068] In this embodiment, the upper cover 2 is mainly composed of three parts: a first plane portion 21, a raised portion 22 and a second plane portion 23. These parts are connected to each other and together constitute the overall structure of the upper cover 2. For example, the first plane portion 21, the raised portion 22 and the second plane portion 23 are formed by an integrated molding process.

[0069] The first plane portion 21 is provided with a first through hole 20 and a tip portion 24. The existence of the first through hole 20 provides a necessary passage for the battery cap, so that the connecting component 11 (such as the rivet 111) can pass through and connect with the lower cover 3 or other components. The design of the tip portion 24 is mainly used to cope with the high pressure that may be generated inside the battery. When high pressure is generated inside the battery, the explosion-proof disc 10 is more likely to generate stress concentration in the area where the tip portion 24 extends, and the explosion-proof disc 10 is more likely to rupture, which helps to relieve pressure.

[0070] One end of the raised portion 22 is connected to the first plane portion 21, and the other end is connected to the second plane portion 23. This design not only enhances the overall structural strength of the upper cover 2, but also makes the upper cover 2 more beautiful and unique in appearance. Specifically, the explosion-proof disc 10, the rivet 111 and the riveted member are riveted together to form a riveted assembly 1, and the riveted assembly 1 is placed between the upper cover 2 and the lower cover 3, and the upper cover 2 and the lower cover 3 are welded together. The riveted member in the riveted assembly 1 is arranged at the same horizontal plane as the first plane portion 21, and the explosion-proof disc 10 in the riveted assembly 1 is located below the first plane portion 21 and extends to below the raised portion 22, and there will be a gap between the raised portion 22 and the explosion-proof disc 10. Since the first plane portion 21 and the explosion-proof disc 10 are sealed and connected, and the lower cover 3 and the explosion-proof disc 10 are sealed and connected, even if there is a gap between the raised portion 22 and the explosion-proof disc 10, it will not affect the overall sealing of the battery cap.

[0071] The sealed connection between the first planar portion 21 and the explosion-proof disc 10, for example, after the riveting assembly 1 is placed between the upper cover 2 and the lower cover 3 and the upper cover 2 and the lower cover 3 are welded together, there may still be a small gap between the upper cover 2 and the explosion-proof disc 10, and there may still be a small gap between the lower cover 3 and the explosion-proof disc 10. In this case, the first planar portion 21 of the upper cover 2 can be pressed by a pressing process to ensure that a tight sealing structure is formed between the first planar portion 21 and the explosion-proof disc 10. This sealed connection can prevent the leakage of chemicals or gases inside the battery. In addition, when the first planar portion 21 of the upper cover 2 is pressed by a pressing process, a tip portion 24 is formed on the lower surface of the first planar portion 21.

[0072] In one embodiment, referring to Figure 1 , the second planar portion 23 is welded to the lower cover 3 .

[0073] In this embodiment, the second plane portion 23 of the upper cover 2 is connected to the lower cover 3 by welding. This design not only enhances the overall structural strength of the battery cap, but also improves its sealing performance, thereby further improving the safety of the battery. For example, multiple welding points are formed on the second surface portion of the upper cover 2.

[0074] The embodiment of the present application further provides a battery, wherein the battery comprises the battery cap described above.

[0075] In this embodiment, the battery cap is applied to the battery, and the design of the battery cap has a high degree of safety and sealing performance, thereby providing a strong guarantee for the overall performance of the battery.

[0076] By adopting this battery cap, the battery can maintain a stable working state in various environments, especially under high-voltage conditions, and its safety performance has been significantly improved. At the same time, the sealing performance of the battery cap effectively prevents the leakage of chemical substances or gases inside the battery, further enhancing the safety and reliability of the battery.

[0077] In one embodiment, when the internal gas pressure of the battery exceeds a threshold value, the explosion-proof plate 10 is torn along the thickness direction of the explosion-proof plate 10 in the area where the tip portion 24 extends, and the first through hole 20 and the second through hole 30 are connected to form a pressure relief channel.

[0078] In this embodiment, when the internal pressure of the battery exceeds a preset threshold value (the internal pressure threshold value of different battery models may be different), the explosion-proof disk 10 will tear in the specific area where the tip 24 extends. This tearing is performed along the thickness direction of the explosion-proof disk 10, ensuring the accuracy and effectiveness of the tearing. Once the tearing occurs, the first through hole 20 and the second through hole 30 that were originally separated will be connected to form a rapid pressure relief channel.

[0079] Specifically, when the internal air pressure of the battery rises abnormally, the stress of the tip 24 is concentrated, causing the explosion-proof plate 10 to begin to tear in a predetermined area. This process is not only rapid, but also ensures that the high-pressure gas inside the battery can be smoothly discharged from the formed pressure relief channel to avoid explosion or damage to the battery. Optionally, when the internal air pressure of the battery exceeds the threshold, since the explosion-proof plate 10 is sealed and connected to the rivet 111 and the riveted part, after the explosion-proof plate 10 is torn along its thickness direction in the predetermined area, the explosion-proof plate 10 will flip over, so that the diameter of the connecting channel connecting the first through hole 20 and the second through hole 30 is larger, which is more conducive to pressure relief. It should be noted that when the internal air pressure of the battery exceeds the threshold, the explosion-proof plate 10 is torn along its thickness direction in the predetermined area. When the explosion-proof plate 10 is not flipped over, due to the tearing of the explosion-proof plate 10, a connecting channel connecting the first through hole 20 and the second through hole 30 will be formed to facilitate pressure relief.

[0080] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0081] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery cap, characterized in that: Battery cap includes: A riveted assembly (1), the riveted assembly (1) comprising an explosion-proof disc (10) and a connecting assembly (11), the explosion-proof disc (10) and the connecting assembly (11) being sealed and connected by riveting; An upper cover (2) and a lower cover (3), the upper cover (2) being provided with a first through hole (20), the lower cover (3) being provided with a second through hole (30), the upper cover (2) and the lower cover (3) being welded to form an accommodation space, the riveting assembly (1) being placed in the accommodation space and the connecting assembly (11) penetrating the first through hole (20) and the second through hole (30); The upper cover (2) and the lower cover (3) are respectively sealed and connected to the explosion-proof disk (10), and a tip portion (24) formed on the lower surface of the upper cover (2) extends into the explosion-proof disk (10).

2. The battery cap according to claim 1, characterized in that: The connection assembly (11) comprises a rivet (111) and a riveting plate (112); the explosion-proof plate (10) and the riveting plate (112) are sleeved on the rivet (111), and the explosion-proof plate (10) is located below the riveting plate (112); The rivet sheet (112), the explosion-proof sheet (10) and the rivet sheet (112) are riveted so that the rivet sheet (112) and the rivet (111) are respectively sealed and connected to the explosion-proof sheet (10).

3. The battery cap according to claim 2, characterized in that: The connection between the riveted sheet (112) and the explosion-proof sheet (10) forms a first sealing area (41), and the riveted sheet (112) is deformed so that part of the riveted sheet (112) fills the first sealing area (41).

4. The battery cap according to claim 2, characterized in that: A second sealing area (42) is formed at the connection between the rivet (111) and the explosion-proof disk (10), and the rivet (111) is deformed so that part of the rivet (111) fills the second sealing area (42).

5. The battery cap according to claim 1, characterized in that: The explosion-proof sheet (10) is a plastic sheet.

6. The battery cap according to claim 1, characterized in that: The diameter of the second through hole (30) is smaller than the diameter of the first through hole (20).

7. The battery cap according to any one of claims 1 to 6, characterized in that: The upper cover (2) comprises a first plane portion (21), a raised portion (22) and a second plane portion (23), one end of the raised portion (22) being connected to the first plane portion (21), and the other end of the raised portion (22) being connected to the second plane portion (23); The first plane portion (21) is formed with the first through hole (20) and the tip portion (24), and the first plane portion (21) in the upper cover (2) is sealed and connected to the explosion-proof disk (10).

8. The battery cap according to claim 7, characterized in that: The second plane portion (23) is welded to the lower cover (3).

9. A battery, characterized in that: The battery comprises the battery cap according to any one of claims 1-8.

10. The battery according to claim 9, characterized in that When the internal gas pressure of the battery exceeds a threshold value, the explosion-proof plate (10) is torn along the thickness direction of the explosion-proof plate (10) in the area where the tip portion (24) extends, and the first through hole (20) and the second through hole (30) are connected to form a pressure relief channel.

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