Cover plate structure for battery and battery

Abstract

The utility model discloses a cover plate structure for a battery and the battery, the cover plate structure comprises a substrate, a pressing block and a pole, and the substrate is provided with a through mounting hole in the thickness direction of the substrate; the pressing block is arranged on the base plate, the surface, deviating from the base plate, of the pressing block is a mounting surface, a matching hole penetrating in the thickness direction of the base plate is formed in the mounting surface, and the matching hole is communicated with the mounting hole; the pole is arranged in the mounting hole and the matching hole in a penetrating manner, the end surface of the pole extends out of or is flush with the mounting surface, the pole is constructed to be a punch forming part made of the same material as the pressing block, and the peripheral edge of the pole is fixed with the pressing block through laser welding. According to the cover plate structure disclosed by the utility model, the pole and the pressing block are directly fixed by adopting a laser welding technology, so that the production process flow is simplified, the manufacturing cost is reduced, meanwhile, the common problems of poor flatness of the pressing block, upper plastic cracks and the like in the traditional riveting process are effectively avoided, and a powerful guarantee is provided for the safety and the service life of the battery.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a cover plate structure for batteries and a battery. Background Art

[0002] With the increasing global emphasis on environmental protection and sustainable development, the new energy vehicle industry is experiencing unprecedented growth opportunities. The performance and cost of power batteries, its core component, are directly linked to the competitiveness of new energy vehicles. The structural design of power batteries, particularly the reliability and efficiency of their internal connectors, has become both a key and challenging area of ​​research and development in the industry.

[0003] In the manufacturing process of power batteries, riveting technology is widely used to connect battery cell components due to its simplicity and speed. However, with the continuous improvement of battery energy density and safety performance requirements, the riveting process faces many challenges. First, it is often difficult to accurately control the flatness of the pressing block during the riveting process, resulting in substandard flatness, which in turn affects the sealing and overall performance of the battery pack. Second, the upper plastic components are prone to cracking during the riveting process, which not only reduces product reliability but also may pose a safety hazard. Utility Model Content

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a cover plate structure for a battery. This cover plate structure utilizes laser welding technology to directly secure the poles and the pressing block, simplifying the production process and reducing manufacturing costs. It also effectively avoids common problems with traditional riveting processes, such as poor pressing block flatness and cracks in the upper plastic, effectively ensuring battery safety and longevity.

[0005] The utility model also provides a battery with the cover plate structure.

[0006] According to the utility model, the cover plate structure is used for a battery, and the cover plate structure includes a substrate, a pressure block and a pole, the substrate is formed with a mounting hole that passes through in the thickness direction of the substrate; the pressure block is arranged on the substrate, and the surface of the pressure block facing away from the substrate is constructed as a mounting surface, and a matching hole that passes through in the thickness direction of the substrate is formed on the mounting surface, and the matching hole is connected to the mounting hole; the pole is passed through the mounting hole and the matching hole, and the end face of the pole protrudes from or is flush with the mounting surface, the pole is constructed as a stamped part of the same material as the pressure block, and the outer peripheral edge of the pole is fixed to the pressure block by laser welding.

[0007] The cover plate structure according to the present invention is used for a battery, and includes a base plate, a pressing block and a pole. The base plate is formed with a mounting hole that passes through in the thickness direction of the base plate, and the mounting hole is used for mounting and positioning the pole.

[0008] The pressure block is set on the base plate. The pressure block is used to fix and support the pole and maintain close contact between the pole and the base plate. The surface of the pressure block facing away from the base plate is constructed as the mounting surface, which is the contact surface between the pole and other components (such as external circuits). A matching hole is formed on the mounting surface and passes through the thickness direction of the base plate. The matching hole is connected to the mounting hole so that the pole can pass through the matching hole and the mounting hole. The matching hole and the mounting hole are on the same vertical axis. The pole can pass through the mounting hole from the bottom of the base plate without hindrance, and then pass through the matching hole of the pressure block until it is exposed or flush with the mounting surface of the pressure block.

[0009] The pole is used for the input or output of current. The pole is inserted into the mounting hole and the matching hole to achieve stable installation of the pole. The end face of the pole extends out or is flush with the mounting surface, that is, the top end face of the pole (that is, the part exposed to the mounting surface of the pressure block) can extend out of the mounting surface, or it can be completely flush with the mounting surface, which is convenient for the connection between the pole and the external circuit and ensures the flatness of the entire cover structure. The pole is constructed as a stamped part of the same material as the pressure block, that is, the pole is made of the same material as the pressure block, which helps to maintain the stability and consistency of the welding during the laser welding process. The pole is manufactured through a stamping process, which can ensure that the shape, size and precision of the pole meet the design requirements, simplify the cover manufacturing process, and also solve the problems of poor pressure block flatness and plastic cracks caused by riveting.

[0010] The outer edge of the pole is laser welded to the pressure block. Laser welding, with its high precision, high efficiency, low deformation, and strong welding strength, achieves a reliable connection between the pole and the pressure block, improving the stability and reliability of the entire cover structure. It also eliminates the riveting process used in related technologies, saving costs.

[0011] According to some embodiments of the present invention, the pressing block is formed with an annular groove recessed on the mounting surface, and the annular groove is arranged around the edge of the fitting hole.

[0012] According to some embodiments of the present invention, the height difference between the end surface of the pole and the bottom wall of the annular groove is h and satisfies: h≥0.1 mm.

[0013] According to some embodiments of the present invention, the diameter of the fitting hole is equal to the diameter of the pole.

[0014] According to some embodiments of the present invention, the diameter of the fitting hole is d and satisfies: d≥5mm.

[0015] According to some embodiments of the present invention, the cover structure further includes: an upper plastic part, which is arranged between the substrate and the pressure block, and the upper plastic part is formed with a matching groove open away from the substrate, at least a portion of the pressure block is embedded in the matching groove, and the bottom wall of the matching groove is formed with a first through hole connecting the mounting hole and the matching hole.

[0016] According to some embodiments of the present invention, the cover structure further includes: a lower plastic part, which is arranged on a side of the substrate away from the upper plastic part, and is formed with a second through hole communicating with the mounting hole.

[0017] According to some embodiments of the present invention, the pressure block forms a limiting portion on the edge of the matching hole, and the limiting portion and the mounting hole at least partially overlap in the thickness direction of the substrate; the pole includes a support plate and a pole body, the support plate is formed with a supporting surface that cooperates with the lower plastic part, and a step portion protruding from the support surface is formed on the support plate, and the step portion passes through the second through hole, the mounting hole and the first through hole in sequence and stops with the limiting portion; the pole body is arranged on the step portion, the pole body is passed through the matching hole and the outer peripheral edge of the pole body is laser welded and fixed to the pressure block.

[0018] According to some embodiments of the present invention, the cover structure further includes: a sealing ring, which is disposed between the lower plastic component and the base plate and surrounds the outer circumference of the mounting hole.

[0019] The battery according to the present invention is briefly described below.

[0020] The battery according to the present invention includes the cover plate structure described in any of the above embodiments. Because the battery according to the present invention includes the cover plate structure described in any of the above embodiments, the battery according to the present invention simplifies the production process and reduces manufacturing costs, while also improving the safety and service life of the battery and effectively avoiding the problems of poor flatness and cracking in traditional processes.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 This is a structural diagram of a cover plate structure according to an embodiment of the present utility model;

[0024] Figure 2 This is an exploded view of a cover plate structure according to one embodiment of the present invention;

[0025] Figure 3 This is a structural schematic diagram of a pressing block of a cover plate structure according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of another pressing block of the cover plate structure according to one embodiment of the present utility model;

[0027] Figure 5 is a cross-sectional schematic diagram of another pressing block of the cover plate structure according to one embodiment of the present utility model;

[0028] Figure 6 is a schematic cross-sectional view of a cover plate structure according to an embodiment of the present utility model;

[0029] Figure 7 It is a structural schematic diagram of a pole with a cover structure according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] 1. Cover plate structure;

[0032] 11. base plate, 111. mounting hole;

[0033] 12. Press block, 121. Mounting surface, 122. Matching hole, 123. Annular groove, 124. Limiting portion;

[0034] 13. Pole, 131. Support plate, 132. Step portion, 133. Pole body;

[0035] 14. Upper plastic part, 141. Matching groove, 142. First through hole;

[0036] 15. lower plastic part, 151. second through hole;

[0037] 16. Sealing ring. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0040] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In the related technologies, riveting technology is widely used in the connection of battery cell components during the manufacturing process of power batteries due to its simple and fast characteristics. However, with the continuous improvement of battery energy density and safety performance requirements, the riveting process faces many challenges. First, it is often difficult to accurately control the flatness of the pressing block during the riveting process, resulting in substandard flatness, which in turn affects the sealing and overall performance of the battery pack. Secondly, cracks are prone to appear on the upper plastic parts during the riveting process, which not only reduces the reliability of the product, but also may cause safety hazards.

[0042] Reference below Figure 1-Figure 7 A cover plate structure 1 according to an embodiment of the present invention is described.

[0043] like Figures 1-6 As shown, the cover plate structure 1 according to the present invention is used for a battery. The cover plate structure 1 includes a substrate 11, a pressing block 12 and a pole 13. The substrate 11 is formed with a mounting hole 111 that passes through in the thickness direction of the substrate 11. The mounting hole 111 is used for installing and positioning the pole 13.

[0044] The pressing block 12 is arranged on the substrate 11. The pressing block 12 is used to fix and support the pole 13 and maintain close contact between the pole 13 and the substrate 11. The surface of the pressing block 12 facing away from the substrate 11 is constructed as a mounting surface 121. The mounting surface 121 is the contact surface between the pole 13 and other components (such as an external circuit). A matching hole 122 is formed on the mounting surface 121 and passes through the thickness direction of the substrate 11. The matching hole 122 is connected to the mounting hole 111 so that the pole 13 can pass through the matching hole 122 and the mounting hole 111. The matching hole 122 and the mounting hole 111 are on the same vertical axis. The pole 13 can pass through the mounting hole 111 from the bottom of the substrate 11 without hindrance, and then pass through the matching hole 122 of the pressing block 12 until it is exposed or flush with the mounting surface 121 of the pressing block 12.

[0045] The pole 13 is used for the input or output of current. The pole 13 is inserted into the mounting hole 111 and the matching hole 122 to achieve a stable installation of the pole 13. The end face of the pole 13 extends out of or is flush with the mounting surface 121, that is, the top end face of the pole 13 (that is, the part exposed to the mounting surface 121 of the pressure block 12) can extend out of the mounting surface 121, or it can be completely flush with the mounting surface 121, which is convenient for the connection between the pole 13 and the external circuit and ensures the flatness of the entire cover structure 1. The pole 13 is constructed as a stamped part of the same material as the pressure block 12, that is, the pole 13 is made of the same material as the pressure block 12, which helps to maintain the stability and consistency of the welding during the laser welding process. The pole 13 is manufactured by a stamping process, which can ensure that the shape, size and precision of the pole 13 meet the design requirements, simplify the cover manufacturing process, and also solve the problems of poor flatness of the pressure block 12 and cracks in the upper plastic caused by riveting.

[0046] The outer edge of the pole 13 is laser welded to the pressing block 12. Laser welding, with its high precision, high efficiency, low deformation, and strong welding strength, achieves a reliable connection between the pole 13 and the pressing block 12, improving the stability and reliability of the entire cover structure 1. It also eliminates the riveting process used in related technologies, saving costs.

[0047] Therefore, according to the cover plate structure 1 of the present invention, the pole 13 and the pressure block 12 are directly fixed by adopting laser welding technology, which simplifies the production process and reduces the manufacturing cost. At the same time, it effectively avoids the problems of poor flatness of the pressure block 12 and cracks in the upper plastic that are common in the traditional riveting process, thereby providing a strong guarantee for the safety and service life of the battery.

[0048] It should be noted that both a positive electrode post 13 and a negative electrode post 13 are present on the cover structure 1. The positive electrode post 13 is mated with and fixed to the positive electrode pressing block 12, and the positive electrode post 13 and the positive electrode pressing block 12 are made of the same material. Similarly, the negative electrode post 13 is mated with and fixed to the negative electrode pressing block 12, and the negative electrode post 13 and the negative electrode pressing block 12 are made of the same material. However, the materials of the positive electrode post 13 and the negative electrode post 13 can be different.

[0049] According to some embodiments of the present invention, Figure 3-Figure 5 As shown, the pressing block 12 is formed with an annular groove 123 recessed on the mounting surface 121, and the annular groove 123 is arranged around the edge of the matching hole 122. The annular groove 123 can be used as a positioning reference during laser welding to help accurately align the welding position between the pole 13 and the pressing block 12. Since the annular groove 123 surrounds the edge of the matching hole 122, it can ensure that the position of the welding point is accurate during laser welding, thereby improving the accuracy and reliability of welding. The presence of the annular groove 123 can increase the welding area, thereby enhancing the welding strength between the pole 13 and the pressing block 12. During welding, the laser beam can weld along the edge of the annular groove 123 to form a continuous weld, which firmly fixes the pole 13 to the pressing block 12, thereby improving the stability and durability of the connection.

[0050] According to some embodiments of the present invention, the height difference h between the end face of the pole 13 and the bottom wall of the annular groove 123 satisfies the following requirement: h ≥ 0.1 mm. The end face of the pole 13 refers to the top portion of the pole 13 exposed above the mounting surface 121 of the compact 12, while the bottom wall of the annular groove 123 refers to the deepest point of the annular groove 123 within the compact 12. The height difference h between the end face of the pole 13 and the bottom wall of the annular groove 123 is no less than 0.1 mm. This ensures that during laser welding, the welding energy is fully applied to the contact area between the pole 13 and the compact 12, forming a stable and high-quality weld, thereby improving the strength and reliability of the weld. Furthermore, when the battery is integrated into the power system, the end face of the pole 13 needs to be welded to the busbar. Maintaining a certain height difference h ensures that after laser welding the pole 13 and the compact 12, the end face of the pole 13 remains sufficiently flat and accessible, without any obstruction or adverse effect on the subsequent busbar joint welding process.

[0051] According to some embodiments of the present invention, the diameter of the mating hole 122 is equal to the diameter of the terminal 13, so that the terminal 13 can be accurately positioned and fixed when passing through the mating hole 122, helping to ensure the accurate position of the terminal 13 in the battery cover structure 1, thereby improving the reliability and stability of the battery. During the laser welding process, the design of the mating hole 122 and the terminal 13 having equal diameters helps ensure that the welding energy is evenly distributed across the welding area, thereby forming a high-quality weld and helping to improve the strength and reliability of the weld.

[0052] According to some embodiments of the present invention, the diameter of the mating hole 122 is d and satisfies the requirement of d ≥ 5 mm. This ensures sufficient contact area between the electrode 13 and the pressure block 12 during welding. Consequently, the cross-sectional area of ​​the weld is increased, allowing it to withstand greater tensile or compressive forces and improving the strength of the weld. By improving the strength and stability of the weld, the load-bearing capacity and safety performance of the entire battery assembly are enhanced.

[0053] According to some embodiments of the present invention, Figure 2 and Figure 6 As shown, the cover structure 1 also includes an upper plastic part 14, which is arranged between the substrate 11 and the pressure block 12 to achieve a stable connection between the substrate 11 and the pressure block 12, and can provide additional support, sealing and insulation effects. The upper plastic part 14 is formed with a mating groove 141 that is open away from the substrate 11, and the mating groove 141 provides space for the embedding of the pressure block 12. At least part of the pressure block 12 is embedded in the mating groove 141, so that the pressure block 12 can be firmly fixed in the cover structure 1 while maintaining the compactness and stability of the structure. The bottom wall of the mating groove 141 is formed with a first through hole 142 that connects the mounting hole 111 with the mating hole 122, so that the pole 13 can smoothly pass through the mounting hole 111, the first through hole 142 and the mating hole 122 in sequence, and the current or signal can smoothly pass through the cover structure 1 while maintaining the integrity and sealing of the structure.

[0054] According to some embodiments of the present invention, Figure 2 and Figure 6 As shown, the cover structure 1 also includes a lower plastic member 15, which is disposed on the side of the base plate 11 facing away from the upper plastic member 14. This positions the upper and lower plastic members 14 and 15 on opposite sides of the base plate 11, thereby enhancing the stability and durability of the entire cover structure 1. The lower plastic member 15 is formed with a second through-hole 151 that communicates with the mounting hole 111. The second through-hole 151 allows the pole 13 to pass through. Together with the mounting hole 111 on the base plate 11, the first through-hole 142 in the upper plastic member 14, and the mating hole 122 in the pressure block 12, this second through-hole 151 forms a complete passageway for securing and electrically connecting the pole 13.

[0055] According to some embodiments of the present invention, Figure 3-Figure 7 As shown, the pressing block 12 forms a limiting portion 124 at the edge of the matching hole 122. The limiting portion 124 serves to provide a physical positioning point for the pole 13 during the subsequent installation and fixing process to ensure that the pole 13 can be accurately installed in the predetermined position.

[0056] The limiting portion 124 at least partially overlaps with the mounting hole 111 in the thickness direction of the substrate 11, so that when the pole 13 passes through the mounting hole 111, the limiting portion 124 can block the step portion 132 on the pole 13 to limit the movement of the pole 13 and realize the control of the position of the pole 13.

[0057] The pole 13 includes a support plate 131 and a pole body 133 . The support plate 131 is used to provide additional mechanical support, while the pole body 133 is the part that actually transmits current.

[0058] The support plate 131 is formed with a support surface that cooperates with the lower plastic part 15 to abut against it. When the support surface cooperates with the lower plastic part 15, it will abut against it (i.e., it is in close contact and supports each other), which helps to ensure the stability of the pole 13 during installation and prevent it from shaking or shifting during use.

[0059] The support plate 131 is formed with a stepped portion 132 protruding from the support surface. The stepped portion 132 is used to abut against the stopper 124 during the subsequent installation process, thereby providing an additional positioning point for the pole 13. During the installation process, the stepped portion 132 will sequentially pass through the second through-hole 151, the mounting hole 111, and the first through-hole 142, and ultimately abut against the stopper 124 on the pressure block 12, achieving precise positioning of the pole 13 and providing a solid foundation for its subsequent fixation.

[0060] The pole body 133 is disposed on the step portion 132 , passes through the fitting hole 122 , and the outer peripheral edge of the pole body 133 is fixed to the pressing block 12 by laser welding to achieve a firm connection between the pole 13 and the pressing block 12 .

[0061] According to some embodiments of the present invention, Figure 2 As shown, the cover structure 1 also includes a sealing ring 16, which is arranged between the lower plastic part 15 and the substrate 11 and is arranged around the outer periphery of the mounting hole 111, thereby forming a sealing barrier around the mounting hole 111 to prevent external moisture, dust and other impurities from penetrating into the cover structure 1 through the mounting hole 111, or preventing gas, liquid, etc. inside the battery from leaking into the external environment through the mounting hole 111.

[0062] The battery according to the present invention is briefly described below.

[0063] The battery according to the present invention includes the cover plate structure 1 of any of the above-described embodiments. Because the battery according to the present invention includes the cover plate structure 1 of any of the above-described embodiments, the battery according to the present invention simplifies the production process and reduces manufacturing costs, while also improving the safety and service life of the battery and effectively avoiding the problems of poor flatness and cracking in traditional processes.

[0064] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0065] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cover structure for a battery, characterized in that: include: A substrate (11), wherein the substrate (11) is formed with a mounting hole (111) penetrating in a thickness direction of the substrate (11); A pressing block (12), the pressing block (12) being arranged on the substrate (11), the surface of the pressing block (12) facing away from the substrate (11) being configured as a mounting surface (121), the mounting surface (121) being formed with a matching hole (122) penetrating in the thickness direction of the substrate (11), the matching hole (122) being in communication with the mounting hole (111); A pole (13), the pole (13) is inserted into the mounting hole (111) and the matching hole (122), and the end face of the pole (13) extends out of or is flush with the mounting surface (121), the pole (13) is constructed as a stamped part made of the same material as the pressing block (12), and the outer peripheral edge of the pole (13) is fixed to the pressing block (12) by laser welding; wherein The pressing block (12) is formed with an annular groove (123) recessed on the mounting surface (121), the annular groove (123) is arranged around the edge of the matching hole (122), and the height difference between the end face of the pole (13) and the bottom wall of the annular groove (123) is h and satisfies: h≥0.1mm.

2. The cover plate structure according to claim 1, characterized in that: The diameter of the matching hole (122) is equal to the diameter of the pole (13).

3. The cover plate structure according to claim 2, characterized in that: The diameter of the matching hole (122) is d and satisfies: d≥5mm.

4. The cover plate structure according to claim 1, characterized in that: Also includes: An upper plastic part (14), the upper plastic part (14) is arranged between the base plate (11) and the pressing block (12), the upper plastic part (14) is formed with a matching groove (141) open away from the base plate (11), at least a portion of the pressing block (12) is embedded in the matching groove (141), and the bottom wall of the matching groove (141) is formed with a first through hole (142) connecting the mounting hole (111) and the matching hole (122).

5. The cover plate structure according to claim 4, characterized in that: Also includes: A lower plastic part (15) is provided on a side of the substrate (11) facing away from the upper plastic part (14), and the lower plastic part (15) is formed with a second through hole (151) communicating with the mounting hole (111).

6. The cover plate structure according to claim 5, characterized in that: The pressing block (12) forms a limiting portion (124) at the edge of the matching hole (122), and the limiting portion (124) at least partially overlaps with the mounting hole (111) in the thickness direction of the substrate (11); The pole (13) comprises: A support plate (131), the support plate (131) is formed with a support surface that cooperates with the lower plastic part (15) to abut against the support surface, the support plate (131) is formed with a step portion (132) protruding from the support surface, the step portion (132) sequentially passes through the second through hole (151), the mounting hole (111) and the first through hole (142) and abuts against the limiting portion (124); A pole body (133) is provided on the step portion (132), the pole body (133) is passed through the matching hole (122), and the outer peripheral edge of the pole body (133) is fixed to the pressing block (12) by laser welding.

7. The cover plate structure according to claim 6, characterized in that: Also includes: A sealing ring (16) is disposed between the lower plastic part (15) and the base plate (11) and is disposed around the outer periphery of the mounting hole (111).

8. A battery, characterized in that: The cover plate structure comprises the cover plate structure according to any one of claims 1 to 7.

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