Cover plate assembly and battery

Abstract

The application relates to the technical field of batteries, and discloses a cover plate assembly and a battery. The cover plate assembly comprises a cover plate body, the cover plate body is provided with a pole mounting hole, and the cover plate body is formed with a flange structure around the pole mounting hole; a pole assembly is arranged in the pole mounting hole, the pole assembly comprises a pole and an insulating piece, and the insulating piece is arranged between the pole and the flange structure; the flange structure is suitable for tightly fixing the pole assembly; the pole assembly further comprises a separation piece made of an insulating material, one end of the separation piece is connected with the insulating piece, and the other end of the separation piece at least partially extends to the outer surface of the flange structure. The cover plate assembly provided by the application can form an effective blocking layer on the part of the separation piece extending to the outer surface of the flange structure after the riveting of the flange structure is completed, can form a blocking effect on metal scraps or wires, and even if the metal scraps or wires exist, the creepage distance between the flange structure and the pole is increased due to the existence of the separation piece, and the short circuit risk is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a cover plate assembly and a battery. Background Technology

[0002] In the battery industry, battery covers typically have through holes for mounting terminals. The terminals pass through these holes and connect to the electrode assembly inside the battery. To ensure a secure fit between the terminals and the cover, a common method is to install a flanged structure at the edge of the through hole, fixing the terminals between the flanged structure and the cover.

[0003] When fixing the flanged structure, riveting is required. Riveting refers to applying pressure to the flanged structure using riveting equipment, causing it to undergo plastic deformation, thereby clamping and fixing the pole. Since both the pole and the cover plate are made of metal, insulation is achieved between them by placing an insulating pad. However, during the riveting process, the riveting equipment and the flanged structure are in metal-to-metal contact, which can easily generate metal debris or form wires. This can easily cause arcing between the pole and the flanged structure, reducing insulation performance and increasing the risk of short circuits. Utility Model Content

[0004] In view of this, this application provides a cover plate assembly and a battery to solve the problem that the riveting process of the flange structure is prone to generating metal shavings or forming wires, which can easily cause arcing and pose a short circuit risk.

[0005] In a first aspect, this application provides a cover plate assembly, comprising: The cover plate body has pole mounting holes and a flange structure formed around the pole mounting holes. A pole assembly is provided in a pole mounting hole. The pole assembly includes a pole and an insulating component. The insulating component is disposed between the pole and the flange structure. The flange structure is adapted to press and fix the pole assembly. The pole assembly also includes an isolator made of insulating material, one end of which is connected to the insulating material, and the other end extends at least partially to the outer surface of the flange structure.

[0006] Beneficial effects: The cover plate assembly provided in this application, by setting an isolator in the pole assembly and connecting one end of the isolator to the insulating member, and extending at least partially to the outer surface of the flange structure, can form an effective barrier layer after the flange structure is riveted. This barrier layer can block metal debris or wire. Even if metal debris or wire is present, the presence of the isolator increases the creepage distance between the flange structure and the pole, preventing the formation of a small conductive bridge. This effectively prevents arcing caused by metal debris or wire, improves the insulation performance between the pole and the cover plate, and reduces the risk of short circuit.

[0007] Secondly, this application also provides a battery, comprising: And a cover plate assembly as described above is disposed on the outer casing, the outer casing and the cover plate assembly enclosing and forming a receiving cavity; The battery cell is disposed within the housing cavity and has tabs formed on it. The tabs are electrically connected to the terminals of the cover plate assembly.

[0008] Since the battery includes a cover assembly, which has the same effect as the cover assembly, it will not be elaborated further here. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 This is a partial schematic diagram of the cover plate body of this application; Figure 2 This is a schematic diagram of the pole post of this application; Figure 3 This is a cross-sectional view of the pole assembly of this application; Figure 4 This is a cross-sectional schematic diagram of the pole post assembly and cover plate body in the assembly state of this application; Figure 5 This is a partial cross-sectional view of the cover plate body according to one embodiment of this application; Figure 6 This is a partial cross-sectional view of the cover plate body according to another embodiment of this application; Figure 7 This is a partial cross-sectional view of the cover plate body according to another embodiment of this application; Figure 8 This is a partial cross-sectional view of the cover plate body according to an additional embodiment of this application; Figure 9 This is a partial cross-sectional view of the cover plate body according to another embodiment of this application; Explanation of reference numerals in the attached figures: 1. Cover plate body; 11. Flanged structure; 111. Extension; 112. Pressing part; 12. Pole post mounting hole; 13. Cantilever beam; 101. First surface of the cover plate; 102. Outer peripheral surface of the flange; 103. Inner peripheral surface of the flange; 2. Pole assembly; 21. Pole; 211. Support part; 212. Top surface of pole; 22. Insulating component; 221. Snap-fit ​​groove; 23. Isolating component; 231. Snap-fit ​​part; 201. Insulating inner surface. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0014] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0015] In the battery industry, battery covers typically have through holes for mounting terminals. The terminals pass through these holes and connect to the electrode assembly inside the battery. To ensure a secure fit between the terminals and the cover, a common method is to install a flanged structure at the edge of the through hole, fixing the terminals between the flanged structure and the cover.

[0016] The flanged structure requires riveting during fixing. Riveting refers to applying pressure to the flanged structure using riveting equipment, causing it to undergo plastic deformation and thus clamping and fixing the terminal post. Since both the terminal post and the cover plate are made of metal, insulation is achieved between them using an insulating pad. However, during the riveting process, the riveting equipment and the flanged structure are in metal-to-metal contact, which can easily generate metal debris or form wires. Splashed metal debris may remain on the surface of the insulating pad, forming tiny conductive bridges that can easily cause arcing, further reducing insulation performance and increasing the risk of short circuits. Wire impurities are small filaments that may be pulled out of the flanged structure after riveting. If these filaments are not completely removed, they can also cause internal short circuits or insulation failure in the battery, affecting battery safety.

[0017] The following is combined with Figures 1 to 9 This describes an embodiment of the present application.

[0018] According to an embodiment of this application, in one aspect, a cover plate assembly is provided, comprising: The cover plate body 1 has an electrode mounting hole 12 and a flange structure 11 is formed around the electrode mounting hole 12. The pole assembly 2 is disposed in the pole mounting hole 12. The pole assembly 2 includes a pole 21 and an insulating member 22. The insulating member 22 is disposed between the pole 21 and the flange structure 11. The flange structure 11 is adapted to press and fix the pole assembly 2. The pole assembly 2 also includes an isolator 23, which is made of an insulating material. One end of the isolator 23 is connected to the insulating member 22, and the other end extends at least partially to the outer surface of the flange structure 11.

[0019] The cover plate body 1 of this application has a pole mounting hole 12, and the pole assembly 2 is disposed in the pole mounting hole 12. In order to achieve a stable connection between the pole assembly 2 and the cover plate body 1, the cover plate body 1 has a flange structure 11 around the pole mounting hole 12. The flange structure 11 is suitable for pressing and fixing the pole assembly 2 in the position of the pole mounting hole 12, thereby preventing the pole assembly 2 from loosening or falling off during use.

[0020] The flange structure 11 can be integrally formed with the cover plate body 1 through a stamping process.

[0021] Since both the cover plate body 1 and the pole post 21 are made of metal, insulation is required between them to prevent short circuits or leakage. For this purpose, an insulating element 22 is provided between the pole post 21 and the cover plate body 1. The insulating element 22 is sleeved on the outside of the pole post 21 and sandwiched between the cover plate body 1 and the pole post 21.

[0022] The flange structure 11 has an avoidance state and a pressing state. When the flange structure 11 is in the avoidance state, the pole post assembly 2 can be smoothly installed into the pole post mounting hole 12. By applying pressure to the flange structure 11 through the riveting equipment, it changes from the avoidance state to the pressing state, thereby firmly fixing the pole post assembly 2 in the pole post mounting hole 12.

[0023] In this embodiment, when the riveting equipment applies pressure to the flange structure 11, the riveting equipment and the flange structure 11 are in metal-to-metal contact, which can easily generate metal debris or form wires. The splashed metal debris may remain on the surface of the insulating pad, forming tiny conductive bridges, which can easily cause arcing, further reducing the insulation performance and increasing the risk of short circuit. Wire impurities may also cause internal short circuits or insulation failures in the battery, affecting the safety of the battery. Therefore, this application further provides an isolator 23, one end of which is connected to the insulator 22, and the other end extends at least partially to the outer surface of the flange structure 11. After the flange structure 11 is riveted, the portion of the isolator 23 extending to the outer surface of the flange structure 11 forms an effective barrier layer, blocking metal debris or wire. Even if metal debris or wire is present, the presence of the isolator 23 increases the creepage distance between the flange structure 11 and the electrode post 21, preventing the formation of a small conductive bridge. This effectively prevents arcing caused by metal debris or wire, improves the insulation performance between the electrode post 21 and the cover plate body 1, and reduces the risk of short circuits. It increases the insulation distance between the flange structure 11 and the electrode post assembly 2, effectively blocking arcing caused by metal debris and wire impurities, improving insulation reliability, and further reducing the risk of short circuits caused by metal debris or wire.

[0024] By extending the insulating member 23 to the outer surface of the flange structure 11, metal debris on the surface of the insulating member 22 can be effectively blocked, and wire-drawing impurities generated during the riveting process can be directed away from the insulating member 22 to prevent them from adhering to the surface of the insulating member 22, thereby preventing the formation of conductive bridges.

[0025] In some embodiments, the insulating member 23 surrounds the insulating member 22 and is arranged in a ring.

[0026] By surrounding the insulating member 22 in a ring-shaped manner, the insulating member 23 can cover and protect the outer surface of the flanged structure 11 in all directions, thereby effectively preventing metal debris or wire from adhering to the surface of the insulating member 22 and further improving the insulation reliability.

[0027] In addition, the annular structure of the isolator 23 can enhance the overall sealing performance and prevent impurities from entering the pole assembly 2.

[0028] In some embodiments, the insulating member 23 and the insulating member 22 are integrally formed.

[0029] As one implementation, the isolator 23 and the insulator 22 can be integrally formed, thereby ensuring the structural stability and sealing between the isolator 23 and the insulator 22.

[0030] However, since the spacer 23 covers the outer surface of the flange structure 11, the riveting equipment needs to contact and apply pressure to the outer surface of the flange structure 11 during the riveting process. To avoid damage to the spacer 23 by the riveting equipment, the spacer 23 can be folded over during the riveting stage to make way for the outer surface of the flange structure 11, thereby ensuring the smooth progress of the riveting process and preventing the riveting effect of the flange structure 11 from being affected by the obstruction of the spacer 23. After the riveting is completed, the spacer 23 is returned to its original position so that it can continue to play its role in blocking metal debris and wire drawing impurities.

[0031] Additionally, clearance grooves or locally thinned areas can be provided on the isolation member 23 to facilitate the folding operation of the isolation member 23, thereby effectively giving way to the outer surface of the flange structure 11 during the riveting process and reducing the possibility of interference between the riveting equipment and the isolation member 23.

[0032] In some embodiments, the isolator 23 and the insulator 22 are detachably connected.

[0033] Since the isolator 23 covers the outer surface of the flange structure 11, to prevent damage to the isolator 23 from the riveting equipment during the riveting process, the isolator 23 can be detachably connected to the insulating component 22 and installed on the outer surface of the flange structure 11 after riveting. Therefore, when the riveting equipment applies pressure to the flange structure 11, the isolator 23 is not directly affected by the riveting equipment, thus avoiding deformation or damage caused by pressure and ensuring the integrity of the isolator 23. This not only ensures the smooth progress of the riveting process but also further enhances the effective blocking effect of the isolator 23 against metal debris and wire scrap.

[0034] In some embodiments, combined with Figure 7 As shown, one of the isolating member 23 and the insulating member 22 has a snap-fit ​​groove 221, and the other has a snap-fit ​​part 231 that mates with the snap-fit ​​groove 221. The snap-fit ​​groove 221 and the snap-fit ​​part 231 are detachably connected.

[0035] As one embodiment of the detachable connection between the isolator 23 and the insulator 22, a snap-fit ​​connection structure can be adopted. Specifically, one of the isolator 23 and the insulator 22 has a snap-fit ​​groove 221, and the other has a snap-fit ​​part 231 that mates with the snap-fit ​​groove 221. The snap-fit ​​groove 221 and the snap-fit ​​part 231 are detachably connected, so that after riveting, the isolator 23 is installed onto the insulator 22 through the engagement of the snap-fit ​​groove 221 and the snap-fit ​​part 231.

[0036] Combination Figure 7 As shown, in some embodiments, the insulating member 22 has a snap-fit ​​groove 221, and the insulating member 23 has a snap-fit ​​portion 231 that mates with the snap-fit ​​groove 221. The snap-fit ​​groove 221 and the snap-fit ​​portion 231 are detachably connected. As a variation, combined with Figure 8 As shown, the isolation member 23 has a snap-fit ​​groove 221, and the insulating member 22 has a snap-fit ​​portion 231 that mates with the snap-fit ​​groove 221. The snap-fit ​​groove 221 and the snap-fit ​​portion 231 are detachably connected.

[0037] In some embodiments, the depth range of the snap-fit ​​groove 221 is E, in mm, satisfying: 0.8≤E≤10. For example, in this embodiment, the value of E can be 0.8 or 1.0 or 1.3 or 1.5 or 2.0 or 2.5 or 4.0 or 6.5 or 8.0 or 10.0, or it can be a range formed by any two of the above values.

[0038] Additionally, as a variation, the detachable connection between the spacer 23 and the insulator 22 can also be achieved through magnetic connection, threaded connection, or adhesive connection, etc. Specific implementations can be selected by those skilled in the art according to actual needs, and will not be listed here in detail.

[0039] In some embodiments, the spacer 23 is bonded to the outer surface of the flange structure 11, and / or the spacer 23 is bonded to the insulating member 22.

[0040] By further bonding the spacer 23 to the outer surface of the flange structure 11, the fixing effect of the spacer 23 on the outer surface of the flange structure 11 can be enhanced, preventing the spacer 23 from shifting or falling off due to vibration or external force during subsequent use, thereby ensuring its continuous and effective blocking effect against metal debris and impurities. At the same time, the bonding method is simple to operate, enabling the quick installation and fixing of the spacer 23, thus improving assembly efficiency.

[0041] Additionally, the spacer 23 can also be bonded to the insulator 22.

[0042] In some embodiments, combined with Figure 5 As shown, the flange structure 11 extends outward from the first surface 101 of the cover plate body 1. The flange structure 11 includes an extension 111 and a pressing part 112. The extension 111 extends from the first surface 101 of the cover plate in a direction away from the cover plate body 1, and the pressing part 112 bends and extends from one end of the extension 111 away from the first surface 101 of the cover plate toward the pole mounting hole 12. The separator 23 at least partially covers the side surface of the press-fit portion 112 away from the first surface 101 of the cover plate.

[0043] By covering at least part of the side surface of the press-fit portion 112 away from the first surface 101 of the cover plate with the spacer 23, the coverage of the spacer 23 on the press-fit portion 112 is more direct and effective, thereby better playing its role in blocking metal debris.

[0044] In some embodiments, the width of the overlapping area between the separator 23 and the pressing part 112 is B, in mm, and satisfies: 0.5≤B≤2.0.

[0045] By limiting the lower limit of the width B of the overlapping area between the isolator 23 and the pressing part 112, it can be ensured that the coverage area of ​​the isolator 23 on the pressing part 112 is sufficient, thereby effectively preventing arcing caused by metal debris or wire drawing due to insufficient coverage, ensuring the insulation performance between the pole 21 and the cover plate body 1, and reducing the risk of short circuit. In addition, by limiting the upper limit of the width B of the overlapping area between the isolator 23 and the pressing part 112, it can be prevented that the isolator 23 extends excessively and affects the assembly space or the installation of other components, thereby ensuring the functionality while taking into account the compactness of the overall structure.

[0046] For example, in this embodiment, the value of B can be 0.5 or 0.8 or 1.0 or 1.2 or 1.3 or 1.5 or 1.6 or 1.8 or 2.0, or it can be a range formed by any two of the above values.

[0047] In some embodiments, in a direction parallel to the first surface 101 of the cover plate, the pressing part 112 forms a flanged inner peripheral surface 103 on the side facing the pole mounting hole 12; the insulating member 22 forms an insulating inner surface 201 on the side facing the pole 21. In the direction parallel to the first surface 101 of the cover plate, the maximum distance between the inner insulating surface 201 and the inner circumferential surface 103 of the flange is D, in mm; the width of the overlapping area between the separator 23 and the pressing part 112 is B, in mm; satisfying: 0.15≤B·D≤10.

[0048] Since the maximum distance D between the inner insulating surface 201 and the inner circumferential surface 103 of the flange determines the insulation capability between the pole 21 and the cover plate body 1, properly controlling the B / D ratio is crucial to ensuring the insulation performance between the pole and the cover plate. Specifically, the smaller D is, the greater the risk of insulation failure. In this case, B should be increased accordingly to improve the coverage effect of the isolator 23 on the pressing part 112, thereby effectively blocking metal debris and reducing the risk of short circuit. Conversely, when D is larger, the insulation capability is stronger, and B can be appropriately reduced, but sufficient coverage must still be ensured to ensure that the isolator 23 can function stably during the pressing process.

[0049] For example, in this embodiment, the value of B·D can be 0.15 or 0.2 or 0.6 or 1 or 1.2 or 1.3 or 1.5 or 1.6 or 1.8 or 2.0 or 2.5 or 2.8 or 3.0 or 3.2 or 3.4 or 3.5 or 4 or 5 or 7 or 8.2 or 9 or 10, etc., or it can be a range formed by any two of the above values.

[0050] In some embodiments, in a direction parallel to the first surface 101 of the cover plate, the extension 111 forms a flanged outer peripheral surface 102 on the side opposite to the pole mounting hole 12. One end of the insulating member 23 is connected to the insulating member 22, and the other end extends at least partially to the outer peripheral surface 102 of the flange.

[0051] Furthermore, the other end of the isolation component 23 extends at least partially to the outer peripheral surface 102 of the flange, thereby increasing the contact area and improving the overall stability and sealing performance.

[0052] In some embodiments, the cover plate body 1 is made of metal, and the outer surface of the flange structure 11 is provided with an insulating coating.

[0053] By providing an insulating coating on the outer surface of the flange structure 11, the insulation performance between the pole assembly 2 and the cover plate body 1 can be further enhanced, effectively preventing arcing caused by metal scraps or wire drawing.

[0054] In some embodiments, combined with Figure 1 , Figure 2 As shown, the cover plate body 1 also includes a cantilever beam 13, which is arranged around the pole post mounting hole 12 and is located on the side of the flange structure 11 facing the pole post mounting hole 12. The pole post 21 includes a support portion 211, which is disposed around the outer peripheral surface of the pole post 21; The cantilever beam 13 is adapted to support the support portion 211 in a direction perpendicular to the first surface 101 of the cover plate.

[0055] By setting a cantilever beam 13 around the pole post mounting hole 12, and the cantilever beam 13 being located on the side of the flange structure 11 facing the pole post mounting hole 12, the cantilever beam 13 can provide stable support for the support portion 211 of the pole post 21, thereby enhancing the installation stability of the pole post 21 on the cover plate body 1.

[0056] It should be noted that the cover plate body 1 of this application can be formed into a cantilever beam 13 by means of extrusion or casting during the processing and forming stage. In this embodiment, extrusion molding process is preferred to improve production efficiency and ensure the structural accuracy of the cantilever beam 13.

[0057] In this embodiment, the edge of the pole assembly 2 includes an arc segment, that is, the edge of the pole assembly 2 is designed with a rounded transition rather than a sharp or right-angled transition design, which can effectively reduce the probability of stress concentration.

[0058] In some embodiments, the pole assembly 2 is configured as a racetrack-shaped structure, which includes two parallel long sides and two semi-circular or arc-shaped short sides. The pole mounting hole 12 matches the shape of the pole assembly 2.

[0059] In some embodiments, the aspect ratio of the pole post 21 is F, satisfying: 1.2≤F≤6.0. For example, in this embodiment, the value of F can be 1.2 or 1.4 or 1.6 or 1.8 or 2.0 or 2.5 or 3.0 or 4.0 or 4.5 or 5.0 or 5.5 or 6.0, or it can be a range formed by any two of the above values.

[0060] In some embodiments, the insulating element 23 is made of an insulating material.

[0061] The isolator 23 is made of insulating material, which can effectively block abnormal current flow paths and further improve the insulation reliability between the terminal assembly 2 and the cover plate body 1. In some embodiments, the material of the isolator 23 is selected from materials with good insulation properties such as rubber, plastic or ceramic. In addition, the structural form of the isolator 23 is matched with its functional requirements, and can be a sheet, ring or multi-layer composite structure to enhance its adaptability and sealing performance under complex assembly conditions.

[0062] In some embodiments, combined with Figure 6 As shown, the pole post 21 includes a pole post top surface 212, which is positioned above the insulating member 22 and the isolating member 23 in a direction perpendicular to the pole post top surface 212.

[0063] In some embodiments, in the direction perpendicular to the top surface 212 of the pole post, the minimum distance G, in mm, is the distance between the top surface 212 of the pole post and the insulating member 22 or the isolating member 23; satisfying: 0.3≤G≤3. For example, in this embodiment, the value of G can be 0.3, 0.4, 0.5, 0.8, 1.0, 1.5, 2.0, 2.5, or 3.0, or it can be a range formed by any two of the above values.

[0064] By leaving the top surface 212 of the electrode post partially exposed after assembly, it facilitates the connection and fixation of external conductive components. Simultaneously, it ensures that the insulating component 22 and the isolating component 23 effectively cover the sidewalls and bottom of the electrode post 21, improving overall insulation safety. It also avoids poor contact caused by deformation of the insulating material due to compression, enhancing connection reliability.

[0065] According to an embodiment of this application, another aspect provides a battery, comprising: shell; And a cover plate assembly as described above is disposed on the outer casing, the outer casing and the cover plate assembly enclosing and forming a receiving cavity; The battery cell is disposed within the housing cavity and has tabs formed on it. The tabs are electrically connected to the poles 21 of the cover plate assembly.

[0066] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by this application.

Claims

1. A cover plate assembly, characterized in that, include: The cover plate body (1) has a pole mounting hole (12) and a flange structure (11) is formed around the pole mounting hole (12). A pole assembly (2) is disposed in the pole mounting hole (12). The pole assembly (2) includes a pole (21) and an insulating member (22). The insulating member (22) is disposed between the pole (21) and the flange structure (11). The flange structure (11) is adapted to press and fix the pole assembly (2). The pole assembly (2) also includes an isolator (23) made of insulating material, one end of which is connected to the insulating material (22), and the other end extends at least partially to the outer surface of the flange structure (11).

2. The cover plate assembly according to claim 1, characterized in that, The insulating element (23) surrounds the insulating element (22) and is arranged in a ring.

3. The cover plate assembly according to claim 1, characterized in that, The insulating member (22) has a snap-fit ​​groove (221), and the insulating member (23) has a snap-fit ​​portion (231) that mates with the snap-fit ​​groove (221). The snap-fit ​​groove (221) and the snap-fit ​​portion (231) are detachably connected.

4. The cover plate assembly according to claim 1, characterized in that, The isolation member (23) has a snap-fit ​​groove (221), and the insulating member (22) has a snap-fit ​​portion (231) that mates with the snap-fit ​​groove (221). The snap-fit ​​groove (221) and the snap-fit ​​portion (231) are detachably connected.

5. The cover plate assembly according to claim 3 or 4, characterized in that, The depth range of the snap-fit ​​groove (221) is E, in mm, and satisfies: 0.8≤E≤10.

6. The cover plate assembly according to claim 1, characterized in that, The isolation element (23) is bonded to the outer surface of the flange structure (11), and / or the isolation element (23) is bonded to the insulating element (22).

7. The cover plate assembly according to claim 1, characterized in that, The flange structure (11) includes an extension (111) and a pressing part (112). The extension (111) extends from the first surface (101) of the cover plate in a direction away from the cover plate body (1). The pressing part (112) bends and extends from one end of the extension (111) away from the first surface (101) of the cover plate toward the pole mounting hole (12). The separator (23) at least partially covers the side surface of the press-fit portion (112) away from the first surface (101) of the cover plate.

8. The cover plate assembly according to claim 7, characterized in that, The width of the overlapping area between the isolation member (23) and the pressing part (112) is B, in mm, and satisfies: 0.5≤B≤2.

0.

9. The cover plate assembly according to claim 7, characterized in that, In a direction parallel to the first surface (101) of the cover plate, the pressing part (112) forms a flanged inner circumferential surface (103) on the side facing the pole mounting hole (12); the insulating member (22) forms an insulating inner surface (201) on the side facing the pole (21). In a direction parallel to the first surface (101) of the cover plate, the maximum distance between the inner insulating surface (201) and the inner circumferential surface (103) of the flange is D, in mm; the width of the overlapping area between the separator (23) and the pressing part (112) is B, in mm; satisfying: 0.15≤B·D≤10.

10. The cover plate assembly according to claim 7, characterized in that, In a direction parallel to the first surface (101) of the cover plate, the extension (111) forms a flanged outer peripheral surface (102) on the side opposite to the pole mounting hole (12). One end of the isolation member (23) is connected to the insulation member (22), and the other end extends at least partially to the outer peripheral surface (102) of the flange.

11. The cover plate assembly according to claim 1, characterized in that, The cover plate body (1) is made of metal, and the outer surface of the flange structure (11) is provided with an insulating coating.

12. The cover plate assembly according to claim 1, characterized in that, The cover plate body (1) also includes a cantilever beam (13), which is arranged around the pole mounting hole (12) and located on the side of the flange structure (11) facing the pole mounting hole (12); The pole post (21) includes a support portion (211), which is arranged around the outer peripheral surface of the pole post (21); The cantilever beam (13) is adapted to support the support (211) in a direction perpendicular to the first surface (101) of the cover plate.

13. The cover plate assembly according to claim 1, characterized in that, The isolation component (23) and the insulation component (22) are integrally formed.

14. The cover plate assembly according to claim 1, characterized in that, The isolating element (23) is detachably connected to the insulating element (22).

15. The cover plate assembly according to claim 1, characterized in that, The pole assembly (2) is constructed as a racetrack-shaped structure, which includes two parallel long sides and two semi-circular or arc-shaped short sides. The pole mounting hole (12) matches the shape of the pole assembly (2).

16. The cover plate assembly according to claim 1, characterized in that, The aspect ratio of the pole (21) is F, which satisfies: 1.2≤F≤6.

17. The cover plate assembly according to claim 1, characterized in that, The pole (21) includes a pole top surface (212), which is positioned above the insulating member (22) and the isolating member (23) in a direction perpendicular to the pole top surface (212).

18. The cover plate assembly according to claim 17, characterized in that, In the direction perpendicular to the top surface (212) of the pole post, the minimum distance between the top surface (212) of the pole post and the insulating member (22) or the isolating member (23) is G, in mm; satisfying: 0.3≤G≤3.

19. A battery, characterized in that, include: shell; And a cover plate assembly as described in any one of claims 1 to 18, which is disposed on the housing, wherein the housing and the cover plate assembly enclose a receiving cavity; A battery cell is disposed within the receiving cavity, and the battery cell has tabs formed thereon, which are electrically connected to the pole (21) of the cover plate assembly.

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