Battery cover plate assembly, battery and electric equipment

Abstract

The utility model relates to a battery, and discloses a battery cover plate assembly, a battery and electric equipment. The battery cover plate comprises a riveting ring, a lower gasket, a cover plate and a pole main body, the riveting ring is sleeved in a mounting hole of the cover plate, and two ends of the riveting ring are respectively provided with a first crimping edge positioned above the cover plate and a second crimping edge positioned below the cover plate. 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 and between the cover plate and the first crimping edge, a pressing space is formed between the first crimping edge and the second crimping edge, a pole cover plate is arranged at one end, extending out of the riveting ring, of the pole main body, and the lower gasket is arranged at the other end of the riveting ring. And the pole cover plate is connected with the first crimping edge. The battery cover plate assembly disclosed by the utility model can effectively reduce the material cost and further reduce the production cost of the battery.

Description

Technical Field

[0001] The utility model relates to a battery, in particular to a battery cover assembly, and also to a battery and an electrical device. Background Art

[0002] With the increasing development of science and technology and the emergence of new energy electric vehicles, the manufacturing of electric vehicles cannot be separated from batteries, which has intensified the market demand for batteries; but as the demand grows, the usage and performance requirements of batteries are becoming higher and higher, and the manufacturing cost of batteries will also increase accordingly, thereby increasing the overall price of electric vehicles. Therefore, it is particularly important to reduce the manufacturing cost of batteries without reducing the battery performance indicators.

[0003] In the prior art, the battery cover structure used in cylindrical batteries mainly includes two types of pole assembly: steel shell structure and aluminum shell structure, among which most pole assembly structures are used for negative electrodes. However, since the end face of the pole cover needs to meet the requirements of welding collector plates or pack welding surfaces at the same time, the volume of the end face of the pole cover will be designed to be larger. The main material of the pole is copper, which leads to more copper material, resulting in an increase in the overall manufacturing cost of the battery.

[0004] In view of the above problems existing in the prior art, the utility model provides a novel battery cover assembly. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a battery cover assembly, which adopts a split structure design, reduces the pole material, and can effectively reduce the battery cost.

[0006] The technical problem that the utility model also solves is to provide a battery, wherein the battery cover assembly of the battery adopts a split structure design, which reduces the pole material and can effectively reduce the battery cost.

[0007] The technical problem that the utility model needs to solve is to provide an electrical device, wherein the battery cover assembly of the electrical device adopts a split structure design, which reduces the pole material and can effectively reduce the battery cost.

[0008] In order to solve the above technical problems, the utility model provides a battery cover assembly, including a rivet ring, a lower gasket, a cover and a pole body, the rivet ring is sleeved in the mounting hole of the cover, and the two ends of the rivet ring are respectively formed with a first crimping edge located above the cover and a second crimping edge located below the cover, the lower gasket is at least partially arranged between the second crimping edge and the cover, an insulating sealing layer is arranged between the cover, the lower gasket and the first crimping edge, a compression space is formed between the first crimping edge and the second crimping edge, and the end of the pole body extending out of the rivet ring is provided with a pole cover, and the pole cover is connected to the first crimping edge.

[0009] Preferably, the insulating sealing layer comprises a sealing ring and an insulating ring, 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.

[0010] 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 riveted ring.

[0011] 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.

[0012] Preferably, the pole body includes a current collecting plate, the current collecting plate includes a first boss protruding toward the riveted ring, and the upper surface of the first boss is connected to the pole cover; or, the side of the current collecting plate close to the pole cover is connected to an overcurrent connector, and the end of the overcurrent connector away from the current collecting plate passes through the riveted ring and is connected to the pole cover.

[0013] Further preferably, the current-passing 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 a current-passing mounting hole that matches the first shaft body. The first shaft body passes through the current-passing mounting hole so that the stepped surface is pressed on the current collecting plate, and a connecting plate for connecting the pole cover is formed at one end of the second shaft body away from the first shaft body.

[0014] 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.

[0015] 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 can provide elastic force to drive the mounting plate to move closer to the riveted ring, and the mounting plate is formed with the first boss or connected to the current-passing connector.

[0016] Further preferably, the elastic structure comprises 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.

[0017] Preferably, an assembly gap is provided between the root of the first boss and the lower end surface of the lower gasket or the lower end surface of the second crimping edge.

[0018] Another aspect of the utility model provides a battery, comprising a battery cover assembly according to any one of the above technical solutions.

[0019] Another aspect of the utility model provides an electrical device, comprising a battery cover assembly or a battery according to any one of the above technical solutions.

[0020] Through the above technical solution, the beneficial effects of the utility model are as follows:

[0021] The battery cover plate assembly of the utility model adopts a split design, the rivet ring is inserted into the mounting hole of the cover plate, and a lower gasket is arranged between the second crimping edge and the cover plate, so that the second crimping edge can cooperate with the first crimping edge through the lower gasket to compress the insulating sealing layer between the cover plate, the lower gasket and the first crimping edge to ensure the insulating sealing effect, and then the pole cover plate extending out of one end of the rivet ring through the pole body is connected to the first crimping edge. Therefore, the rivet ring and the lower gasket do not have a current-carrying function, and do not need to be made of high-cost copper and aluminum materials. They can be replaced with lower-cost materials, thereby reducing the production cost of the battery.

[0022] Other advantages of the present invention and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural explosion diagram of a specific embodiment of the battery cover assembly of the utility model;

[0024] Figure 2 It is a cross-sectional view of a specific embodiment of the battery cover assembly of the utility model in a state where the pole cover is not riveted;

[0025] Figure 3 It is a specific implementation of the battery cover assembly of the utility model

[0026] Cross-sectional view of the pole cover in the riveted state;

[0027] Figure 4 It is a cross-sectional view of a specific embodiment of the battery cover assembly of the utility model;

[0028] Figure 5 It is a schematic diagram of the structure of the collecting plate;

[0029] Figure 6 It is a schematic diagram of the structure of another collecting plate.

[0030] Description of Reference Numerals

[0031] 101 collector plate 102 riveting ring

[0032] 101-1 first boss 104 sealing ring

[0033] 103 lower gasket 104-1 sealing extension

[0034] 103-1 Installation groove 106 Insulation ring

[0035] 105 cover plate 106-1 insulation extension part

[0036] 105-1 Mounting hole 108 Base

[0037] 107 pole cover plate 110 first crimping edge

[0038] 107-1 second boss 111 second crimping edge

[0039] 109 guide elastic sheet 112 flow connection piece

[0040] 112-1 first axis 112-2 second axis

[0041] 112-3 connection plate 113 flow installation hole

[0042] 114 Mounting plate DETAILED DESCRIPTION

[0043] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and 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, or an indirect connection through an intermediate medium, it can be abutment, it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] It should be understood that the directions or positional relationships indicated by the terms "upper" and "lower" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0046] In a basic embodiment of the battery cover assembly of the utility model, as Figure 1 and Figure 4 As shown, the battery cover assembly includes a riveting ring 102, a lower gasket 103, a cover 105 and a pole body. The riveting ring 102 is set in the mounting hole 105-1 of the cover 105. The two ends of the riveting ring 102 are respectively formed with a first crimping edge 110 located above the cover 105 and a second crimping edge 111 located below the cover 105. The lower gasket 103 is at least partially arranged between the second crimping edge 111 and the cover 105. An insulating sealing layer is arranged between the cover 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, so that the insulating sealing layer is compressed to ensure the sealing effect. The end of the pole body 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. By adopting a split design for the lower gasket 103, the rivet ring 102 and the pole cover 105, the lower gasket 103 and the rivet ring 102 mainly play a supporting role without any overcurrent requirement. Therefore, the lower gasket 103 and the rivet ring 102 can be made of materials with low cost, high structural strength and good rust resistance, such as stainless steel instead of the higher cost copper and aluminum materials in the prior art, thereby reducing the overall manufacturing cost of the battery.

[0047] It should be noted that see Figure 1-Figure 3In order to facilitate the subsequent assembly, the riveting ring 102 in the unassembled state is only provided with a first crimping edge 110 located at the upper end, and its lower end is straight-cylindrical, so that the riveting ring 102 can pass through the installation 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 are installed in place, the lower end of the riveting ring 102 can be formed with a second crimping edge 111 by a riveting process, thereby pressing the structure between the first crimping edge 110 and the second crimping edge 111, and making the riveting 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 outer side 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 riveting ring 102 are simple, and it can be produced by stamping and drawing, which reduces the manufacturing cost of the riveting ring 102.

[0048] In a specific embodiment of the present invention, see Figure 1 and Figure 4 , the insulating sealing layer 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, which is convenient for assembly; the insulating ring 106 is located on the outer side compared to the sealing ring 104, so the electrolyte in the battery cell will be sealed by the sealing ring 104, which effectively avoids the contact between the insulating ring 106 and the electrolyte, and improves 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.

[0049] In a specific embodiment of the present invention, see Figure 1 and Figure 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. The sealing extension portion 104-1 is connected to 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 riveting ring 102.

[0050] In a specific embodiment of the present invention, see Figure 1 and Figure 2A mounting groove 103-1 is formed on the lower end surface of the lower gasket 103. When riveting, the second crimping edge 111 formed at the lower end of the rivet ring 102 is crimped into the mounting groove 103-1, so that the connection between the rivet ring 102 and the lower gasket 103 is more stable. As another specific embodiment, the lower gasket 103 may not be provided with the mounting groove 103-1, and the second crimping edge 111 is directly crimped on the lower end surface of the lower gasket 103.

[0051] In a specific embodiment of the present invention, see Figure 1 , Figure 4 and Figure 5 The pole body includes a collector plate 101. As a specific embodiment of the collector plate 101, the collector plate 101 includes a first boss 101-1 protruding toward the riveting ring 102. The upper surface of the first boss 101-1 is connected to the pole cover plate 107 by welding. Specifically, the welding method can be laser penetration welding, and the pole cover plate 107 and the upper surface of the first boss 101 are fused and welded to ensure that the connection surface between the two is effectively flowing, and the number of weld lines can be increased to increase the welding area to ensure the flowing performance. Among them, the center of the collector plate 101 can be formed by multiple drawing and stamping methods to form the first boss 101-1. The height range of the first boss 101-1 is 0-8mm, and the diameter range is 6-30mm. The actual size is determined according to the size of the cover plate or the battery model.

[0052] In a specific embodiment of the present invention, see Figure 1 , Figure 3 and Figure 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 in the rivet ring 102. The rivet ring 102 can radially constrain the two, and the two can axially abut against each other, thereby realizing the positioning of the first boss 101-1 and the second boss 107-1, avoiding shaking of the two during welding and affecting the welding effect; as another specific embodiment, the pole cover 107 can also be a flat plate, and the protruding height of the first boss 101-1 can make the upper surface of the first boss 101-1 exceed the first crimping edge 111 of the rivet ring 102, so that the first boss 101-1 can contact with the pole cover 107, and the connection between the two is realized by welding.

[0053] As another specific embodiment of the collecting plate 101, see Figure 6A side of the current collecting plate 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 plate 101 passes through the rivet ring 102 and is connected to the pole cover 107, so that effective overcurrent between the current collecting plate 101 and the pole cover 107 is achieved 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.

[0054] Specifically, see Figure 6 The current connecting piece 112 is a stepped shaft, which includes 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 plate 101 is formed with a current mounting hole 113 that matches the first shaft body 112-1. The first shaft body 112-1 passes through the current mounting hole 113 so that the stepped surface is pressed on the current collecting plate 101. The end of the second shaft body 112-2 away from the first shaft body 112-1 is formed with a connecting plate 112-3 for connecting the pole cover plate 107. During assembly, the connecting disk and the pole cover 107 can be riveted first. The connecting disk effectively ensures the effective flow area between the current connector 112 and the pole cover 107. After that, the first axis of the current connector can be passed through the riveting ring 102 and inserted into the current mounting hole 113 on the current collecting disk 101, so that the stepped surface is clamped on the current collecting disk 101. Then, the end of the first axis 112-1 away from the second axis 112-2 is upset into a rivet head, so that the current connector 113 and the current collecting disk 101 are riveted 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.

[0055] In a specific embodiment of the present invention, see Figure 1 , Figure 4 and Figure 5 The current collecting plate includes a base 108 and a mounting plate 114, and the mounting plate 114 is connected to the base 108 through an elastic structure. The elastic structure can provide an elastic force to drive the mounting plate 114 to move closer to the riveted ring 102. Corresponding to the two specific embodiments of the current collecting plate, the mounting plate is formed with the above-mentioned first boss 101-1, or the mounting plate is connected to the above-mentioned current-passing connector. Under the action of the elastic force, it is effectively ensured that the welding surface of the first boss 101-1 and the pole cover 107 are effectively fitted and pressed, thereby ensuring the current-passing performance between the two.

[0056] In a specific embodiment of the present invention, see Figure 1, the elastic structure includes a guide elastic sheet 109, the root of the first boss 101-1 is connected to the base 108 through a plurality of guide 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 range is preferably 0.5 to 3 mm, so that the first boss 101 has an upward and downward activity space, during assembly, the first boss 101 is pressed downward, and the guide elastic sheet 109 is compressed and deformed to generate an elastic force that tends to move the first boss 101 upward, so that the first boss 101 and the pole cover 107 are effectively fitted. In addition, after the assembly is completed, the pole cover 107 is connected to the first boss 101. Due to the presence of the guide elastic sheet 109, the welding surface of the first boss 101 and the pole cover 107 can form an elastic buffer. When the battery cell falls, the battery cell moves axially. The elastic buffer can prevent the pole ear under the collector plate from being torn by force, thereby preventing the risk of pole ear tearing failure.

[0057] See also Figure 4 In the case where the lower end surface of the lower gasket 103 is formed with a mounting groove 103-1, the second crimping edge 111 is located in the mounting groove 103-1, and the height of the lower end surface of the second crimping edge 111 is higher than the height of the lower end surface of the lower gasket 103. In order to avoid interference between the collecting plate 101 and the lower gasket 103 during assembly, so that the upper end surface of the first boss 101-1 cannot be fitted with the pole cover 107 to form a virtual weld, preferably, an assembly gap is provided between the root of the first boss 101-1 and the lower end surface of the lower gasket 103, and the gap range is preferably 0.5-3mm This gap is beneficial to the first boss 101-1 extending into the riveted ring 102 during the installation of the collecting plate, and the lower gasket 103 will not contact and interfere with the guide elastic sheet 109; similarly, when the lower gasket 103 is not provided with an installation 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 gap range is preferably 0.5-3mm.

[0058] In order to better understand the technical solution of the battery cover assembly of the utility model, the following is an explanation in combination with relatively preferred technical features.

[0059] like Figure 1 and Figure 4As shown, the battery cover assembly of the utility model includes a rivet ring 102, a lower gasket 103, a cover plate 105 and a pole body. 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. The sealing ring 104 is arranged between the lower gasket 103 and the cover plate 105. An insulating ring 106 is arranged between the cover plate 105 and the first crimping edge 110. See FIG. Figure 2 First, the insulating ring 106, the cover plate 105, the sealing ring 104 and the lower gasket 103 are placed in sequence from top to bottom, and the lower end of the riveting ring 102 passes through the mounting hole 105-1 in the middle of the cover plate 105 from top to bottom, so that the first crimping edge 110 can be pressed on the insulating ring 106. After being installed in place, the lower end of the riveting ring 102 forms a second crimping edge 111 which is pressed into the mounting groove 103-1 of the lower gasket 103 through the riveting process to form a riveted structure, thereby pressing the insulating ring 106 and the sealing ring 104 to form an effective insulating seal; after the riveting is completed, see Figure 3 The pole cover 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 for profile positioning. After the 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; when the battery cover assembly is assembled to the shell, the lower end of the rivet ring 102 is aligned with the first boss 101-1, the first boss 101-1 extends into the rivet ring 102, and docks with the second boss 107-1, and the guide elastic sheet 109 is compressed. Under the elastic force of the guide elastic sheet 109, the welding surface between the first boss 101-1 and the second boss 107-1 is effectively fitted, and the welding surface between the first boss 101-1 and the second boss 107-1 is fusion-welded by laser penetration welding to ensure that the collector plate 107 and the pole cover 101 are effectively connected to achieve flow.

[0060] In summary, the battery cover assembly of the utility model has the following advantages:

[0061] 1. The split design is adopted. According to the functional and structural requirements, the original pole body is decomposed into a riveted ring 102, a lower gasket 103 and a pole cover plate 107, so that the riveted ring 102 and the lower gasket 103 do not need to bear the overcurrent function and can be manufactured with low-cost materials, thereby reducing the material cost of the battery;

[0062] 2. The pole cover plate 101 and the current collecting plate 107 are welded by laser penetration welding, thereby reducing the multi-process folding process of the current collecting plate in the prior art, making the manufacturing process simpler and effectively reducing the manufacturing cost of the battery;

[0063] 3. The current collecting plate 107 has an elastic buffering function through the guide elastic sheet 109, which ensures that the welding surface of the current collecting plate and the pole cover plate 101 are effectively fitted together, and can also prevent the risk of pole ear tearing failure caused by the displacement of the battery cell when the battery falls;

[0064] 4. By welding the first boss 107-1 and the second boss 101-1, the flow between the collecting plate 107 and the pole cover 101 is achieved. Since the welding surface between the first boss 107-1 and the second boss 101-1 is far away from the insulating ring 106 and the sealing ring 104, the risk of excessive heat burning both the insulating ring 106 and the sealing ring 104 can be effectively avoided.

[0065] The utility model also provides a battery, which includes the battery cover assembly provided by the utility model, and therefore has all the beneficial effects thereof, which will not be described in detail herein.

[0066] The utility model also provides an electrical device, which includes the battery cover assembly or the battery provided by the utility model. Therefore, it has all the beneficial effects and will not be described in detail here.

[0067] The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further explain various possible combinations.

[0068] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A battery cover assembly, characterized in that: The invention comprises a rivet ring (102), a lower gasket (103), a cover plate (105) and a pole body, wherein the rivet ring (102) is sleeved in a mounting hole (105-1) of the cover plate (105), 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), and the lower gasket (103) is at least partially arranged on the second crimping edge. An insulating sealing layer is provided between the joint edge (111) and the cover plate (105), between the cover plate (105) and the lower gasket (103), and between the first crimping edge (110); a compression space is formed between the first crimping edge (110) and the second crimping edge (111); a pole cover plate (107) is provided at one end of the pole body extending out of the rivet ring (102); and the pole cover plate (107) is connected to the first crimping edge (110).

2. A battery cover assembly according to claim 1, characterized in that: The insulating sealing layer comprises 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).

3. A battery cover assembly 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), and 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 riveting ring (102).

4. A battery cover assembly according to claim 1, 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. A battery cover assembly according to any one of claims 1 to 4, characterized in that: The pole body comprises a current 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 plate (101) close to the pole cover plate (107) is connected to an overcurrent connector (112), and an end of the overcurrent connector (112) away from the current collecting plate (101) passes through the riveted ring (102) and is connected to the pole cover plate (107).

6. A battery cover assembly according to claim 5, characterized in that: The current-passing connector (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 plate (101) is formed with a current-passing mounting hole (113) matched with the first shaft body (112-1), the first shaft body (112-1) passes through the current-passing mounting hole (113) so that the stepped surface is pressed onto the current collecting plate (101), and a connecting plate (112-3) for connecting to the pole cover plate (107) is formed at one end of the second shaft body (112-2) away from the first shaft body (112-1).

7. A battery cover assembly according to claim 5, characterized in that: The lower end surface of the pole cover plate (107) protrudes toward the riveting 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. A battery cover assembly according to claim 5, 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; the elastic structure can provide an elastic force driving the mounting plate (114) to move closer to the riveted ring (102); the mounting plate (114) is formed with the first boss (101-1) or is connected to the flow connection piece (112).

9. A battery cover assembly according to claim 8, characterized in that: The elastic structure comprises 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. A battery cover assembly 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 gasket (103) or the lower end surface of the second crimping edge (111).

11. A battery, characterized in that: A battery cover assembly comprising any one of claims 1-10.

12. An electrical device, characterized in that: The invention comprises the battery cover assembly according to any one of claims 1 to 10 or the battery according to any one of claim 11.

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