Battery cover plate assembly, battery, and electrical device

Abstract

An electrical device, which comprises a battery, the battery comprising a battery cover assembly. The battery cover plate assembly comprises a riveting ring, a lower gasket, a cover plate, and a pole body. The riveting ring is sleeved within a mounting hole of the cover plate, and a first crimping edge located above the cover plate and a second crimping edge located below the cover plate are respectively formed on two ends of the riveting ring. The lower gasket is arranged between the second crimping edge and the cover plate. An insulating sealing layer is arranged between the cover plate and the lower gasket as well as between the cover plate and the first crimping edge, and a pressing space is formed between the first crimping edge and the second crimping edge. A pole cover plate is arranged at one end of the pole body extending out of the riveting ring, and the pole cover plate is connected to the first crimping edge.

Description

Battery cover assembly, battery and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 29, 2024, with application number 202420401230.8 and titled “Battery Cover Assembly, Battery and Electrical Equipment,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to a battery, and in particular to a battery cover assembly, a battery and an electrical device. Background Art

[0004] With the advancement of technology, new energy electric vehicles have emerged. The manufacture of electric vehicles is inseparable from batteries, which has intensified the market demand for batteries. However, as demand grows, the amount and performance requirements of batteries are becoming increasingly stringent, and the manufacturing cost of batteries has also increased accordingly, resulting in a general increase in the overall price of electric vehicles. Therefore, it is particularly important to reduce battery manufacturing costs without compromising battery performance indicators.

[0005] In the prior art, the battery cover structures used in cylindrical batteries primarily include two types of terminal assemblies: steel shell structures and aluminum shell structures. Most of these terminal assembly structures are used for the negative electrode. However, because the terminal cover end faces need to simultaneously meet the requirements of welding collector plates or pack welding surfaces, the terminal cover end faces are designed to be larger. Since the primary material of the terminal is copper, this results in a higher copper content, increasing the overall manufacturing cost of the battery.

[0006] In view of the above problems existing in the prior art, the present application provides a new type of battery cover assembly.

[0007] Public content

[0008] The technical problem to be solved by the present application is to provide a battery cover assembly, which adopts a split structural design, reduces the material used for the pole, and can effectively reduce the cost of the battery.

[0009] The technical problem that the present application also aims to solve is to provide a battery whose battery cover assembly adopts a split structural design, which reduces the material used for the pole and can effectively reduce the battery cost.

[0010] The technical problem that the present application also aims to solve is to provide an electrical device, wherein the battery cover assembly of the electrical device adopts a split structural design, which reduces the material used for the pole and can effectively reduce the battery cost.

[0011] In order to solve the above technical problems, the first aspect of the present application provides a battery cover assembly, including: a rivet ring; a lower gasket; a cover plate, the rivet ring is sleeved in the mounting hole of the cover plate, and the two ends of the rivet ring are respectively formed with a first crimping edge located above the cover plate and a second crimping edge located below the cover plate, the lower gasket is at least partially arranged between the second crimping edge and the cover plate, an insulating sealing layer is arranged between the cover plate, the lower gasket and the first crimping edge, a compression space is formed between the first crimping edge and the second crimping edge, and a pole body, the pole body extending out of the rivet ring is provided with a pole cover plate, and the pole cover plate is connected to the first crimping edge.

[0012] Preferably, the insulating sealing layer includes: a sealing ring; and an insulating ring, wherein the insulating ring is arranged between the cover plate and the first crimping edge, and the sealing ring is arranged between the cover plate and the lower gasket.

[0013] Preferably, the inner ring of the sealing ring extends axially upward to form a sealing extension portion, and the inner ring of the insulating ring extends axially downward to form an insulating extension portion, and the sealing extension portion butts against the insulating extension portion to form an insulating seal between the hole wall of the mounting hole and the outer wall of the rivet ring.

[0014] Preferably, a mounting groove is formed on the lower end surface of the lower gasket, and the second crimping edge is crimped into the mounting groove.

[0015] Preferably, the pole body includes a current collecting disc, the current collecting disc includes a first boss protruding toward the rivet ring, and the upper surface of the first boss is connected to the pole cover; or, the side of the current collecting disc close to the pole cover is connected to an overcurrent connector, and the end of the overcurrent connector away from the current collecting disc passes through the rivet ring and is connected to the pole cover.

[0016] Further preferably, the overcurrent connector is a stepped shaft, which includes a first shaft body, a second shaft body and a stepped surface. The shaft diameter of the first shaft body is smaller than that of the second shaft body. The current collecting plate is formed with an overcurrent mounting hole that cooperates with the first shaft body. The first shaft body passes through the overcurrent mounting hole so that the stepped surface is pressed on the current collecting plate. The end of the second shaft body away from the first shaft body is formed with a connecting plate for connecting to the pole cover plate.

[0017] Further preferably, the lower end surface of the pole cover plate protrudes toward the riveted ring to form a second boss, and the lower end surface of the second boss is connected to the upper end surface of the first boss.

[0018] Further preferably, the collecting plate includes a base and a mounting plate, the mounting plate is connected to the base via an elastic structure, the elastic structure is used to provide elastic force to drive the mounting plate to approach and move toward the riveted ring, and the mounting plate is formed with the first boss or connected to the flow-through connector.

[0019] Further preferably, the elastic structure includes a guide elastic sheet, the root of the first boss is connected to the base via a plurality of the guide elastic sheets, and there is a height difference between the plane where the root of the first boss is located and the base.

[0020] Preferably, an assembly gap is provided between the root of the first boss and the lower end surface of the lower washer or the lower end surface of the second crimping edge.

[0021] A second aspect of the present application provides a battery, comprising the battery cover assembly described in the above technical solution.

[0022] A third aspect of the present application provides an electrical device, comprising the battery cover assembly or the battery described in the above technical solution.

[0023] Through the above technical solution, the beneficial effects of this application are as follows:

[0024] The battery cover assembly of the present application adopts a split design, in which the rivet ring is inserted into the mounting hole of the cover, and a lower washer is provided between the second crimping edge and the cover, so that the second crimping edge can cooperate with the first crimping edge through the lower washer to compress the insulating sealing layer between the cover, the lower washer and the first crimping edge to ensure the insulating sealing effect, and then the pole cover provided at one end of the pole body extending out of the rivet ring is connected to the first crimping edge. Therefore, the rivet ring and the lower washer do not bear the overcurrent function, and do not need to be made of high-cost copper or aluminum materials. They can be replaced with lower-cost materials, thereby reducing the production cost of the battery.

[0025] Other advantages of the present application and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is an exploded view of a battery cover assembly according to one embodiment of the present application;

[0027] FIG2 is a cross-sectional view of a battery cover assembly according to one embodiment of the present application in a state where the pole cover is not riveted;

[0028] FIG3 is a cross-sectional view of a battery cover assembly in a state where the pole cover is riveted according to one embodiment of the present application;

[0029] FIG4 is a cross-sectional view of a battery cover assembly according to one embodiment of the present application;

[0030] FIG5 is a schematic structural diagram of a current collecting plate;

[0031] FIG6 is a schematic structural diagram of another current collecting plate;

[0032] FIG7 is a schematic block diagram of a battery according to an embodiment of the present application;

[0033] FIG8 is a schematic block diagram of an electric device according to an embodiment of the present application;

[0034] FIG9 is another schematic block diagram of an electric device according to an embodiment of the present application.

[0035] Reference numerals: 300, electrical equipment; 200, battery; 100, battery cover assembly; 101. Collecting plate; 101-1. First boss; 102. Riveted ring; 103. Lower gasket; 103-1. Mounting groove; 104. Sealing ring; 104-1. Sealing extension; 105. Cover plate; 105-1. Mounting hole; 106. Insulating ring; 106-1. Insulating extension; 107. Pole cover plate; 107-1. Second boss; 108. Base; 109. Guide elastic sheet; 110. First crimping edge; 111. Second crimping edge; 112. Overcurrent connector; 112-1. First shaft; 112-2. Second shaft; 112-3. Connecting plate; 113. Overcurrent mounting hole; 114. Mounting plate; 115. Insulating sealing layer; 116. Elastic structure; 117. Pole body. DETAILED DESCRIPTION

[0036] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, an abutment connection, internal communication between two elements, or an interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] It should be understood that the directions or positional relationships indicated by terms such as "upper" and "lower" are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features.

[0039] In a basic embodiment of the battery cover assembly 100 of the present application, as shown in Figures 1 to 4, the battery cover assembly 100 includes a rivet ring 102, a lower gasket 103, a cover plate 105 and a pole body 117. The rivet ring 102 is sleeved in the mounting hole 105-1 of the cover plate 105. The two ends of the rivet ring 102 are respectively formed with a first crimping edge 110 located above the cover plate 105 and a second crimping edge 111 located below the cover plate 105. The lower gasket 103 is at least partially arranged between the second crimping edge 111 and the cover plate 105. An insulating sealing layer 115 is provided between the cover plate 105 and the lower gasket 103 and the first crimping edge 110. A compression space is formed between the first crimping edge 110 and the second crimping edge 111, that is, the first crimping edge 110 and the second crimping edge 111 compress the structure between the two, thereby compressing the insulating sealing layer 115 to ensure a sealing effect. A terminal cover 107 is provided at one end of the terminal body 117 extending beyond the rivet ring 102. The terminal cover 107 is connected to the first crimping edge 110. By adopting a separate design for the lower gasket 103, rivet ring 102, and terminal cover 105, the lower gasket 103 and rivet ring 102 primarily serve as supports and do not have any overcurrent requirements. Therefore, the lower gasket 103 and rivet ring 102 can be made of low-cost, high-strength, and rust-resistant materials. For example, stainless steel can be used instead of the more expensive copper and aluminum materials used in the prior art, thereby reducing the overall manufacturing cost of the battery.

[0040] It should be noted that, referring to Figures 1 to 3, in order to facilitate subsequent assembly, the rivet ring 102 in the unassembled state is only provided with a first crimping edge 110 at the upper end, and its lower end is straight-cylindrical, so that the rivet ring 102 can pass through the mounting hole 105-1 in the middle of the cover plate 105 through the straight-cylindrical lower end. After the lower gasket 103 and the insulating sealing layer 115 are installed in place, a second crimping edge 111 can be formed at the lower end of the rivet ring 102 through a riveting process, thereby tightening the structure between the first crimping edge 110 and the second crimping edge 111, and making the riveted surface (i.e., the second crimping edge 111) inside the battery. Compared with external riveting, there is no need to set a sealing ring on the outside of the cover plate 105 relative to the battery cell, which further saves costs while ensuring the sealing of the battery. In addition, the shape and structure of the rivet ring 102 are simple and can be produced by stamping and drawing, reducing the manufacturing cost of the rivet ring 102.

[0041] In a specific embodiment of the present application, referring to Figures 1 and 4, the insulating sealing layer 115 includes a sealing ring 104 and an insulating ring 106. The insulating ring 106 is arranged between the cover plate 105 and the first crimping edge 110, and the sealing ring 104 is arranged between the cover plate 105 and the lower gasket 103. The sealing ring 104 and the insulating ring 106 can be respectively mounted on both sides of the cover plate 105 along the axial direction for easy assembly. The insulating ring 106 is located further outward than the sealing ring 104, so the electrolyte in the battery cell will be sealed by the sealing ring 104, effectively avoiding contact between the insulating ring 106 and the electrolyte, thereby improving the insulation effect of the insulating ring 106. It should be noted that the above sealing ring 104 and the insulating ring 106 are separately arranged. As another embodiment, the sealing ring 104 and the insulating ring 106 can be integrally manufactured and formed as a whole, and mounted on the mounting hole 105-1 for insulation sealing.

[0042] In a specific embodiment of the present application, referring to Figures 1 and 3, the inner ring of the sealing ring 104 extends axially upward to form a sealing extension portion 104-1, and the inner ring of the insulating ring 106 extends axially downward to form an insulating extension portion 106-1, and the sealing extension portion 104-1 is docked with the insulating extension portion 106-1 to form an insulating seal between the hole wall of the mounting hole 105-1 and the outer wall of the rivet ring 102.

[0043] In one embodiment of the present application, referring to Figures 1 and 2 , a mounting groove 103-1 is formed on the lower end surface of the lower gasket 103. During riveting, a second crimping edge 111 formed on the lower end of the rivet ring 102 is crimped into the mounting groove 103-1, thereby further stabilizing the connection between the rivet ring 102 and the lower gasket 103. Alternatively, the lower gasket 103 may be provided without the mounting groove 103-1, with the second crimping edge 111 being crimped directly onto the lower end surface of the lower gasket 103.

[0044] In a specific embodiment of the present application, referring to Figures 1, 4 and 5, the pole body 117 includes a current collecting disc 101. As a specific embodiment of the current collecting disc 101, the current collecting disc 101 includes a first boss 101-1 protruding toward the rivet ring 102, and the upper surface of the first boss 101-1 is connected to the pole cover 107 by welding. Specifically, the welding method can adopt laser penetration welding to fusion weld the pole cover 107 and the upper surface of the first boss 101-1 to ensure effective flow through the connection surface between the two, increase the number of weld lines, and increase the welding area to ensure flow performance. Among them, the center of the current collecting disc 101 can be formed by multiple drawing and stamping to form the first boss 101-1. The height range of the first boss 101-1 is 0-8mm, and its diameter range is 6-30mm. The actual size is determined according to the size of the cover or the battery model.

[0045] In one embodiment of the present application, referring to Figures 1, 3, and 4, the lower end surface of the pole cover 107 protrudes toward the rivet ring 102 to form a second boss 107-1. The lower end surface of the second boss 107-1 is connected to the upper end surface of the first boss 101-1. The first boss 101-1 and the second boss 107-1 are both located within the rivet ring 102. The rivet ring 102 can radially constrain the two, and the two can axially abut each other, thereby achieving the positioning of the first boss 101-1 and the second boss 107-1, avoiding shaking during welding and affecting the welding effect. As another embodiment, the pole cover 107 can also be flat, and the protruding height of the first boss 101-1 can enable the upper surface of the first boss 101-1 to exceed the first crimping edge 110 of the rivet ring 102, so that the first boss 101-1 can contact the pole cover 107, and then achieve connection between the two by welding.

[0046] As another specific embodiment of the current collecting plate 101, referring to Figure 6, the side of the current collecting plate 101 close to the pole cover 107 is connected to an overcurrent connector 112, and the end of the overcurrent connector 112 away from the current collecting plate 101 passes through the rivet ring 102 and is connected to the pole cover 107, so that effective overcurrent is achieved between the current collecting plate 101 and the pole cover 107 through the overcurrent connector 112, and the current collecting plate 101 and the pole cover 107 are respectively connected through the overcurrent connector 112, which can reduce the manufacturing difficulty and facilitate assembly.

[0047] Specifically, as shown in Figure 6, the current connector 112 is a stepped shaft comprising a first shaft 112-1, a second shaft 112-2, and a stepped surface. The diameter of the first shaft 112-1 is smaller than that of the second shaft 112-2. The current collecting plate 101 is formed with a current mounting hole 113 that mates with the first shaft 112-1. The first shaft 112-1 passes through the current mounting hole 113, so that the stepped surface is pressed against the current collecting plate 101. A connecting plate 112-3 for connecting to the pole cover 107 is formed on the end of the second shaft 112-2 away from the first shaft 112-1. During assembly, first, the connecting plate 112-3 is riveted to the pole cover 107. The connecting plate 112-3 effectively ensures the effective flow area between the overcurrent connector 112 and the pole cover 107. Then, the first shaft 112-1 of the overcurrent connector 112 can be passed through the rivet ring 102 and inserted into the overcurrent mounting hole 113 on the collecting plate 101, so that the stepped surface is clamped on the collecting plate 101. Finally, the end of the first shaft 112-1 away from the second shaft 112-2 is upset into a rivet head, thereby riveting the overcurrent connector 112 and the collecting plate 101 to ensure the mechanical strength of the connection between the two, prevent the pole from moving or loosening during transportation or use, improve efficiency, quality and sustainability, and optimize resource utilization and cost-effectiveness.

[0048] In a specific embodiment of the present application, referring to Figures 1, 4, and 5, the current collecting plate 101 includes a base 108 and a mounting plate 114. The mounting plate 114 is connected to the base 108 via an elastic structure 116, and the elastic structure 116 can provide an elastic force to drive the mounting plate 114 to approach and move toward the riveted ring 102. Corresponding to the two specific embodiments of the current collecting plate 101, the mounting plate 114 is formed with the first boss 101-1, or the mounting plate 114 is connected to the flow connector 112. Under the action of this elastic force, the first boss 101-1 is effectively pressed against the welding surface of the pole cover 107, thereby ensuring the flow performance between the two.

[0049] In a specific embodiment of the present application, referring to FIG1 , the elastic structure 116 includes a flow-guiding elastic sheet 109 . The root of the first boss 101-1 is connected to the base 108 via a plurality of flow-guiding elastic sheets 109 . There is a height difference between the plane where the root of the first boss 101-1 is located and the base 108 , and the height difference preferably ranges from 0.5 to 3 mm. This height difference allows the first boss 101-1 to have upward and downward movement space. During assembly, the first boss 101-1 is pressed downward, and the flow-guiding elastic sheet 109 is deformed under pressure to generate an elastic force that drives the first boss 101-1 to move upward, so that the first boss 101-1 is effectively fitted with the pole cover 107 . In addition, after assembly is completed, a connection is formed between the pole cover 107 and the first boss 101-1. Due to the presence of the guide elastic sheet 109, an elastic buffer can be formed on the welding surface between the first boss 101-1 and the pole cover 107. When the battery cell falls, the battery cell moves axially. The elastic buffer can prevent the pole ear under the collecting plate 101 from being torn by force, thereby preventing the risk of the pole ear tearing and failure.

[0050] Referring to Figures 2 and 4 , when a mounting groove 103-1 is formed on the lower end face of the lower gasket 103, the second crimping edge 111 is located within the mounting groove 103-1, and the lower end face of the second crimping edge 111 is located at a height higher than the lower end face of the lower gasket 103. To prevent the current collecting plate 101 from interfering with the lower gasket 103 during assembly, and to prevent the upper end face of the first boss 101-1 from fitting with the pole cover 107 to form a cold weld, an assembly gap is preferably provided between the root of the first boss 101-1 and the lower end face of the lower gasket 103. The gap preferably ranges from 0.5 to 3 mm. This gap facilitates the installation of the current collecting plate 101, preventing the lower gasket 103 from interfering with the guide elastic sheet 109 during the process of the first boss 101-1 extending into the rivet ring 102. Similarly, when the lower gasket 103 is not provided with the mounting groove 103-1, the second crimping edge 111 is directly crimped on the lower end face of the lower gasket 103, and the height of the lower end face of the second crimping edge 111 is lower than the height of the lower end face of the lower gasket 103. At this time, an assembly gap is provided between the root of the first boss 101-1 and the lower end face of the second crimping edge 111, and the range of the gap is preferably 0.5-3mm.

[0051] In order to better understand the technical solution of the battery cover assembly 100 of the present application, the following description is made in combination with relatively preferred technical features.

[0052] As shown in Figures 1 to 4, the battery cover assembly 100 of the present application includes a rivet ring 102, a lower gasket 103, a cover plate 105 and a pole body 117. The rivet ring 102 is inserted into the mounting hole 105-1 of the cover plate 105. The two ends of the rivet ring 102 are respectively formed with a first crimping edge 110 located above the cover plate 105 and a second crimping edge 111 located below the cover plate 105. The lower gasket 103 is at least partially arranged between the second crimping edge 111 and the cover plate 105, the sealing ring 104 is arranged between the lower gasket 103 and the cover plate 105, and an insulating ring 106 is arranged between the cover plate 105 and the first crimping edge 110.

[0053] Referring to Figure 2 , the insulating ring 106, cover plate 105, sealing ring 104, and lower gasket 103 are first placed in order from top to bottom. The lower end of the rivet ring 102 is passed from top to bottom through the mounting hole 105-1 in the center of the cover plate 105, allowing the first crimping edge 110 to be pressed onto the insulating ring 106. After installation, a riveting process is performed to form a second crimping edge 111 at the lower end of the rivet ring 102 and press it into the mounting groove 103-1 of the lower gasket 103, forming a riveted structure. This compresses the insulating ring 106 and sealing ring 104, forming an effective insulation seal. After riveting is completed, referring to Figure 3 , the pole cover plate 107 is pressed onto the first crimping edge 110, and the second boss 107-1 is placed into the upper end of the rivet ring 102 to achieve surface positioning. After positioning is completed, the pole cover 107 is welded to the first crimping edge 111 to ensure the sealing function of the battery cover assembly 100. The battery cover assembly 100 is then assembled to the housing, and the lower end of the rivet ring 102 is aligned with the first boss 101-1. The first boss 101-1 is inserted into the rivet ring 102 and docked with the second boss 107-1. The diverter elastic sheet 109 is compressed. Under the elastic force of the diverter elastic sheet 109, the welding surface between the first boss 101-1 and the second boss 107-1 is effectively fitted. The welding surface between the first boss 101-1 and the second boss 107-1 is then fused by laser penetration welding to ensure the effective connection between the collecting plate 101 and the pole cover 107 and achieve flow.

[0054] In summary, the battery cover assembly 100 of the present application has the following advantages:

[0055] 1. A split design is adopted. According to functional and structural requirements, the original terminal body 117 is decomposed into a rivet ring 102, a lower washer 103 and a terminal cover 107. This makes the rivet ring 102 and the lower washer 103 no longer need to bear the current-carrying function, and can be manufactured with lower-cost materials, thereby reducing the material cost of the battery;

[0056] 2. Laser penetration welding is used to weld the pole cover plate 107 and the current collecting plate 101, thereby reducing the multiple steps of folding the current collecting plate in the prior art, making the manufacturing process simpler and effectively reducing the manufacturing cost of the battery;

[0057] 3. The guide elastic sheet 109 provides the current collecting plate 101 with an elastic buffering function, ensuring effective contact between the welding surface of the current collecting plate 101 and the pole cover 107. At the same time, it can also prevent the risk of tab tearing and failure caused by cell displacement when the battery falls;

[0058] 4. By welding the first boss 101-1 and the second boss 107-1, flow is achieved between the current collecting plate 101 and the pole cover 107. Because the weld surface between the first boss 101-1 and the second boss 107-1 is far away from the insulating ring 106 and the sealing ring 104, the risk of excessive heat burning the insulating ring 106 and the sealing ring 104 can be effectively avoided.

[0059] The present application also provides a battery 200, which includes the battery cover assembly 100 provided in the present application, as shown in Figure 7. Therefore, the battery 200 has all the beneficial effects of the battery cover assembly 100, which will not be described in detail here.

[0060] The present application also provides an electric device 300, which includes the battery cover assembly 100 or the battery 200 provided in the present application, as shown in Figures 8 and 9. Therefore, the electric device 300 has all the beneficial effects of the battery cover assembly 100 or the battery 200, which will not be repeated here.

[0061] The various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, this application will not further explain various possible combinations.

[0062] In addition, the various implementation methods of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A battery cover assembly (100), characterized in that: include: Riveting ring (102); Lower washer (103); A cover plate (105), the rivet ring (102) is sleeved in the mounting hole (105-1) of the cover plate (105), a first crimping edge (110) located above the cover plate (105) and a second crimping edge (111) located below the cover plate (105) are respectively formed at both ends of the rivet ring (102), the lower gasket (103) is at least partially arranged between the second crimping edge (111) and the cover plate (105), an insulating sealing layer (115) is arranged between the cover plate (105), the lower gasket (103) and the first crimping edge (110), and a compression space is formed between the first crimping edge (110) and the second crimping edge (111); and A pole body (117), one end of the pole body (117) extending out of the riveting ring (102) is provided with a pole cover (107), and the pole cover (107) is connected to the first crimping edge (110).

2. The battery cover assembly (100) according to claim 1, characterized in that: The insulating sealing layer (115) comprises: a sealing ring (104); and An insulating ring (106) is provided between the cover plate (105) and the first crimping edge (110), and the sealing ring (104) is provided between the cover plate (105) and the lower gasket (103).

3. The battery cover assembly (100) according to claim 2, characterized in that: The inner ring of the sealing ring (104) extends axially upward to form a sealing extension portion (104-1), and the inner ring of the insulating ring (106) extends axially downward to form an insulating extension portion (106-1). The sealing extension portion (104-1) butts against the insulating extension portion (106-1) to form an insulating seal between the hole wall of the mounting hole (105-1) and the outer wall of the rivet ring (102).

4. The battery cover assembly (100) according to any one of claims 1 to 3, characterized in that: A mounting groove (103-1) is formed on the lower end surface of the lower gasket (103), and the second crimping edge (111) is crimped into the mounting groove (103-1).

5. The battery cover assembly (100) according to any one of claims 1 to 4, characterized in that: The pole body (117) includes a collecting plate (101), The current collecting plate (101) comprises a first boss (101-1) protruding toward the riveted ring (102), and the upper surface of the first boss (101-1) is connected to the pole cover plate (107); Alternatively, a side of the current collecting disc (101) close to the pole cover (107) is connected to an overcurrent connector (112), and an end of the overcurrent connector (112) away from the current collecting disc (101) passes through the rivet ring (102) and is connected to the pole cover (107).

6. The battery cover assembly (100) according to claim 5, characterized in that: The overcurrent connection piece (112) is a stepped shaft, comprising a first shaft body (112-1), a second shaft body (112-2) and a stepped surface. The shaft diameter of the first shaft body (112-1) is smaller than that of the second shaft body (112-2). The current collecting disc (101) is formed with an overcurrent mounting hole (113) that matches the first shaft body (112-1). The first shaft body (112-1) passes through the overcurrent mounting hole (113) so that the stepped surface is pressed onto the current collecting disc (101). The second shaft body (112-2) is formed with a connecting disc (112-3) for connecting to the pole cover (107) at one end away from the first shaft body (112-1).

7. The battery cover assembly (100) according to claim 5 or 6, characterized in that: The lower end surface of the pole cover plate (107) protrudes toward the riveted ring (102) to form a second boss (107-1), and the lower end surface of the second boss (107-1) is connected to the upper end surface of the first boss (101-1).

8. The battery cover assembly (100) according to any one of claims 5 to 7, characterized in that: The collecting plate (101) comprises a base (108) and a mounting plate (114); the mounting plate (114) is connected to the base (108) via an elastic structure (116); the elastic structure (116) is used to provide an elastic force driving the mounting plate (114) to approach and move toward the riveted ring (102); the mounting plate (114) is formed with the first boss (101-1) or is connected to the flow-through connector (112).

9. The battery cover assembly (100) according to claim 8, characterized in that: The elastic structure (116) includes a flow-guiding elastic sheet (109), the root of the first boss (101-1) is connected to the base (108) via a plurality of the flow-guiding elastic sheets (109), and there is a height difference between the plane where the root of the first boss (101-1) is located and the base (108).

10. The battery cover assembly (100) according to claim 9, characterized in that: An assembly gap is provided between the root of the first boss (101-1) and the lower end surface of the lower washer (103) or the lower end surface of the second crimping edge (111).

11. A battery (200), characterized in that: A battery cover assembly (100) comprising the battery cover assembly (100) according to any one of claims 1 to 10.

12. An electrical device (300), characterized in that: It comprises the battery cover assembly (100) according to any one of claims 1 to 10 or the battery (200) according to claim 11.

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