Cover plate assembly and battery

Abstract

The utility model provides a cover plate assembly and a battery, and the cover plate assembly comprises a cover plate main body which is provided with a through positioning hole; the first insulating part comprises a first main body and a positioning bulge fixedly connected to the first main body, and the positioning bulge penetrates through the cover plate main body through the positioning hole, so that the cover plate main body is in non-rotating connection with the first insulating part; the second insulating part comprises a second main body and is provided with a connecting hole matched with the positioning bulge; and the second main body is connected with the positioning bulge through the connecting hole, so that the second insulating part is in non-rotating connection with the first insulating part. According to the cover plate assembly and the battery provided by the invention, the problem that the insulating property of the cover plate assembly is influenced due to the fact that the first insulating part or the second insulating part rotates and deviates relative to the cover plate main body can be effectively avoided, the number of parts of the cover plate assembly is reduced, the assembly process is effectively simplified, the assembly time is shortened, and the assembly cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a cover plate assembly and a battery. Background Art

[0002] The cover plate assembly is a crucial component of the battery. It consists of a main cover plate and a terminal mounted on it. To ensure insulation and sealing between the terminal and the cover plate, a sealing ring and an insulator are installed between the cover plate and the terminal. However, if the insulator rotates relative to the cover plate, this could negatively impact insulation between the terminal and the cover plate. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a cover plate assembly and a battery, so as to at least partially solve the problem that the insulation performance of the cover plate assembly is affected by the relative rotation between the insulating member and the cover plate body.

[0004] Based on the above-mentioned purpose, the first aspect of the present application provides a cover assembly, including: a cover body, including a first plate surface and a second plate surface arranged opposite to each other along the thickness direction, the cover body is provided with a positioning hole passing through the first plate surface and the second plate surface; a first insulating member, including a first body and a positioning protrusion fixedly connected to the first body, the first body is connected to the first plate surface of the cover body, the positioning protrusion passes through the cover body through the positioning hole, so that the cover body is non-rotatably connected to the first insulating member; a second insulating member, including a second body, the second body is connected to the second plate surface of the cover body, and is provided with a connecting hole matching the positioning protrusion; the second body is connected to the positioning protrusion through the connecting hole, so that the second insulating member is non-rotatably connected to the first insulating member.

[0005] Optionally, the connecting hole is a blind hole.

[0006] Optionally, there are at least two positioning protrusions.

[0007] Optionally, the positioning protrusion is integrally formed and connected to the first body.

[0008] Optionally, the cover plate assembly includes a pole, and the cover plate body is provided with a pole hole passing through the first plate surface and the second plate surface; the second body is provided with a second through hole corresponding to the pole hole; the second body is fixedly connected with an annular sealing ring, the sealing ring is radially located in the second through hole, the sealing ring protrudes axially from the surface of the second body close to the cover plate body, the sealing ring is partially axially penetrated into the pole hole, and the pole is penetrated into the inner hole of the sealing ring.

[0009] Optionally, the sealing ring is integrally formed and connected to the second body.

[0010] Optionally, the circumferential outer wall of the sealing ring is spaced apart from the hole wall of the second through hole to form a first gap, and a cantilever beam is provided in the first gap, with both ends of the cantilever beam respectively connected to the sealing ring and the second body.

[0011] Optionally, the cover plate assembly includes a pole bottom plate fixedly connected to the pole, the pole bottom plate is located on a side of the second body away from the cover plate body, and is non-rotatably connected to the second insulating member.

[0012] Optionally, the first body is provided with a first through hole corresponding to the pole hole, and the first through hole is used to pass the pole; the cover plate assembly includes a rivet connected to the pole, and the rivet is located on a side of the first body away from the cover plate body, and is non-rotatably connected to the first insulating member.

[0013] Based on the same inventive concept, the second aspect of the present application further provides a battery, comprising the cover assembly as described in the first aspect.

[0014] Optionally, the battery includes a bare cell, and the second plate surface of the cover plate body is close to the bare cell.

[0015] As can be seen from the above, the cover assembly and battery provided by the present application allow the positioning protrusion of the first insulating member to pass through the cover body, so as to achieve a non-rotating connection between the first insulating member and the cover body; at the same time, the portion of the positioning protrusion that passes through the cover body is also connected to the second insulating member through a connecting hole, so as to achieve a non-rotating connection between the first insulating member and the second insulating member, thereby forming a non-rotating connection between the first insulating member, the cover body, and the second insulating member. This can effectively avoid the problem of the insulation performance of the cover assembly being affected by the rotational displacement of the first insulating member or the second insulating member relative to the cover body. At the same time, since the positioning protrusion is fixedly connected to the first body, the number of parts of the cover assembly is reduced. There is no need to install the positioning protrusion separately during assembly, which effectively simplifies the assembly process, shortens the assembly time, and reduces the assembly cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1A partial perspective schematic diagram of a cover assembly according to an embodiment of the present application;

[0018] Figure 2 This is a schematic top view of a cover plate assembly according to an embodiment of the present application;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross section AA;

[0020] Figure 4 This is a three-dimensional schematic diagram of a first insulating member of a cover assembly according to an embodiment of the present application;

[0021] Figure 5 This is a three-dimensional schematic diagram of the second insulating member of the cover assembly according to an embodiment of the present application;

[0022] Figure 6 This is a three-dimensional schematic diagram of a cover plate body of a cover plate assembly according to an embodiment of the present application;

[0023] Figure 7 This is a schematic top view of a first insulating member of a cover assembly according to an embodiment of the present application;

[0024] Figure 8 for Figure 7 Schematic diagram of the cutaway CC section in FIG;

[0025] Figure 9 for Figure 2 Schematic diagram of the cross-section of the middle BB.

[0026] Description of reference numerals:

[0027] 100, cover plate body; 110, first plate surface; 120, second plate surface; 130, positioning hole; 140, pole hole;

[0028] 200, pole; 210, pole base plate;

[0029] 300, riveted parts;

[0030] 400, first insulating member; 410, first main body; 420, positioning protrusion; 430, first through hole; 440, first positioning groove;

[0031] 500, second insulating member; 510, second main body; 520, connecting hole; 530, second through hole; 540, sealing ring; 550, cantilever beam; 560, first gap; 570, second positioning groove. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0033] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0034] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] In a single battery, the cover assembly is sealed and connected to the open end of the battery casing. The side of the cover assembly close to the inner cavity of the battery casing is used to electrically connect with the bare battery cell installed in the inner cavity of the battery casing, and the side of the cover assembly away from the battery casing is used to electrically connect with the external circuit. Figure 1 , Figure 1 A partial three-dimensional schematic diagram of the cover assembly is shown. The cover assembly includes a cover body 100 and a pole 200 that passes through the cover body 100. One end of the pole 200 is located below the cover body 100 (i.e., the side of the cover body 100 close to the bare cell) and is used to electrically connect to the bare cell; the other end of the pole 200 is located above the cover body 100 (i.e., the side of the cover body 100 away from the bare cell). This end of the pole 200 is exposed and connected to the rivet 300 for electrical connection to the external circuit.

[0038] Taking the upper structure of the cover body 100 as an example, to ensure insulation performance between the cover body 100 and the pole 200, a first insulating member 400 can be provided between the cover body 100 and the rivet 300. For example, the first insulating member 400 can be a plastic member molded by an injection molding process, thereby ensuring the insulation performance of the first insulating member 400 while minimizing the manufacturing cost.

[0039] like Figure 2 , Figure 2 A schematic top view of the cover assembly is shown. To match the overall structure of the single cell, the cross-section of the rivet 300 and the cross-section of the first insulating member 400 are rounded rectangles of identical shape and size. When the rivet 300 and the first insulating member 400 are relatively stationary, the orthographic projection of the rivet 300 on the surface of the cover body 100 (hereinafter referred to as the rivet projection) and the orthographic projection of the first insulating member 400 on the cover body 100 (hereinafter referred to as the insulating member projection) completely overlap, ensuring insulation performance between the rivet 300 and the cover body 100. However, if the first insulating member 400 rotates laterally, an area of ​​the rivet projection that is not covered by the insulating member projection will appear in the rivet projection, and thus good insulation performance between the rivet 300 and the cover body 100 in this area cannot be guaranteed.

[0040] In order to prevent the first insulating member 400 from rotating, a through hole can be provided on the cover body 100, a groove can be provided on the first insulating member 400, and an anti-twist particle (or anti-rotation column) can be installed in the through hole of the cover body 100. The end of the anti-twist particle protrudes from the surface of the cover body 100 and is inserted into the groove of the first insulating member 400, thereby forming a non-rotational connection between the first insulating member 400 and the cover body 100.

[0041] However, the applicant found that although the anti-twist particles can prevent the first insulating member 400 from rotating, since the anti-twist particles are independent components, adding anti-twist particles will also cause the number of components in the cover assembly to be larger, the assembly process to be more complicated, the assembly time to be longer and the cost to be higher.

[0042] In view of this, the embodiment of the present application provides a cover assembly, such as Figure 3 , Figure 3 Shown Figure 2 The cover assembly includes: a cover body 100, including a first plate surface 110 and a second plate surface 120 arranged opposite to each other in the thickness direction, and a positioning hole 130 is provided on the cover body 100, which passes through the first plate surface 110 and the second plate surface 120; a first insulating member 400, such as Figure 4 , Figure 4The first insulating member 400 is a three-dimensional schematic diagram; the first insulating member 400 includes a first body 410 and a positioning protrusion 420 fixedly connected to the first body 410; Figure 3 , the first body 410 is connected to the first plate surface 110 of the cover body 100, and the positioning protrusion 420 passes through the cover body 100 through the positioning hole 130, so that the cover body 100 is non-rotatably connected to the first insulating member 400; the second insulating member 500, such as Figure 5 , Figure 5 The second insulating member 500 is shown in a perspective view; the second insulating member 500 includes a second body 510, and the second body 510 is provided with a connecting hole 520 that matches the positioning protrusion 420; Figure 3 The second body 510 is connected to the second plate surface 120 of the cover body 100 , and the second body 510 is connected to the positioning protrusion 420 through the connecting hole 520 , so that the second insulating member 500 is non-rotatably connected to the first insulating member 400 .

[0043] For example, the positioning protrusion 420 and the first body 410 may be made of the same material or different materials.

[0044] For example, the positioning protrusion 420 and the first body 410 can be fixedly connected by adhesive connection or integral molding.

[0045] For example, Figure 6 , Figure 6 A schematic perspective view of the cover plate body 100 is shown. The cover plate body 100 can be a flat aluminum structure, and a through hole, slot, or blind hole is formed in the flat plate structure through a stamping process. Designing the cover plate body 100 as a flat plate structure can effectively reduce the manufacturing cost of the cover plate body 100.

[0046] For example, the non-rotational connection between the cover body 100 and the first insulating member 400 can be achieved by at least the following methods. For example, at least two positioning protrusions 420 are provided, each of which extends through the cover body 100 via the positioning hole 130. In another example, at least one positioning protrusion 420 is provided, and the radial cross-sectional shape of the positioning protrusion 420 and the radial cross-sectional shape of the positioning hole 130 are polygonal and match each other. The non-rotational connection between the second insulating member 500 and the first insulating member 400 is achieved in the same manner as described above and will not be further described here.

[0047] Because the positioning protrusion 420 and the first body 410 are fixedly connected as a single unit, during assembly, the operator can simultaneously complete the two operations of attaching the first body 410 to the first panel 110 and inserting the positioning protrusion 420 into the positioning hole 130. At this point, the end of the positioning protrusion 420 passes through the cover body 100 and protrudes beyond the second panel 120. The connection hole 520 of the second insulating member 500 is then aligned with the end of the positioning protrusion 420 and inserted until the second body 510 is attached to the second panel 120.

[0048] After the first insulating member 400 , the cover body 100 and the second insulating member 500 are assembled, a non-rotational connection is formed between the three members because the positioning protrusion 420 passes through the positioning hole 130 and is connected to the connection hole 520 .

[0049] The cover assembly provided herein allows the positioning protrusion 420 of the first insulating member 400 to pass through the cover body 100, thereby achieving a non-rotating connection between the first insulating member 400 and the cover body 100. Simultaneously, the portion of the positioning protrusion 420 that passes through the cover body 100 is also connected to the second insulating member 500 through the connection hole 520, thereby achieving a non-rotating connection between the first insulating member 400 and the second insulating member 500. This effectively avoids the problem of the first insulating member 400 or the second insulating member 500 rotating relative to the cover body 100, thereby affecting the insulation performance of the cover assembly. Furthermore, since the positioning protrusion 420 is fixedly connected to the first body 410, the number of components in the cover assembly is reduced. There is no need to separately install the positioning protrusion 420 during assembly, which effectively simplifies the assembly process, shortens assembly time, and reduces assembly costs.

[0050] like Figure 3 In some embodiments, the connecting hole 520 is a blind hole.

[0051] Exemplarily, the hole depth of the connecting hole 520 is 0.3 mm to 0.7 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm or 0.7 mm; if the hole depth of the connecting hole 520 is too shallow, the connection reliability between the second body 510 and the positioning protrusion 420 is low, and the second insulating member 500 may still rotate relative to the cover body 100; since the thickness of the area of ​​the second body 510 where the connecting hole 520 is set is relatively thin, if the hole depth of the connecting hole 520 is too deep, the bottom of the connecting hole 520 may be broken.

[0052] The connection hole 520 is a blind hole, which can enable the second body 510 to better separate the space below and the space above it, thereby helping to improve the overall sealing performance of the cover assembly.

[0053] like Figure 7 , Figure 7 A schematic top view of the first insulating member 400 is shown. In some embodiments, at least two positioning protrusions 420 are provided.

[0054] Exemplarily, at least two positioning protrusions 420 are evenly arranged around each pole 200 , so that the limiting force provided by the positioning protrusions 420 on the cover body 100 is more uniform, which also helps to improve the connection reliability between the positioning protrusions 420 and the first body 410 .

[0055] In mass production, circular-shaped positioning protrusions 420 are easier to maintain in terms of molding quality than polygonal-shaped positioning protrusions 420. Therefore, to reduce manufacturing complexity and improve product yield, this embodiment includes at least two positioning protrusions 420 on the first body 410 to ensure a reliable, non-rotating connection between the first insulating member 400, the cover body 100, and the second insulating member 500 after the cover assembly is assembled.

[0056] like Figure 8 , Figure 8 for Figure 7 In the CC cross-sectional view in FIG, in some embodiments, the positioning protrusion 420 is integrally connected to the first body 410.

[0057] Exemplarily, both the first insulating member 400 and the second insulating member 500 may be injection-molded plastic parts to reduce the manufacturing cost of the first insulating member 400 and the second insulating member 500 .

[0058] Designing the positioning protrusion 420 and the first main body 410 as an integrally formed connected structure can, on the one hand, improve the connection strength between the positioning protrusion 420 and the first main body 410, ensuring that the positioning protrusion 420 can reliably define the relative positions of the first insulating part 400, the cover plate main body 100 and the second insulating part 500; on the other hand, it can also reduce the complexity of preparing the first insulating part 400 and simplify the preparation process.

[0059] To ensure sealing performance between the terminal 200 and the cover body 100, in some embodiments, a sealing rubber ring is provided between the terminal 200 and the cover body 100, surrounding the terminal 200. If the sealing rubber ring is independent of the cover body 100, the first insulating member 400, and the second insulating member 500, the sealing rubber ring needs to be assembled separately, which can also lead to complex assembly processes, long assembly hours, and high assembly costs.

[0060] In order to solve the above problems, Figure 9 , Figure 9 Shown Figure 2In some embodiments, the cover assembly includes a pole 200, and the cover body 100 is provided with a pole hole 140 that passes through the first plate surface 110 and the second plate surface 120. Figure 5 The second body 510 is provided with a second through hole 530 corresponding to the pole hole 140. The second body 510 is fixedly connected with an annular sealing ring 540. The sealing ring 540 is radially located in the second through hole 530. The sealing ring 540 protrudes axially from the surface of the second body 510 close to the cover body 100. The sealing ring 540 is partially axially penetrated in the pole hole 140, and the pole 200 is penetrated in the inner hole of the sealing ring 540.

[0061] Illustratively, the electrode 200 may be a positive electrode with positive charge or a negative electrode with negative charge.

[0062] For example, the sealing ring 540 and the second body 510 may be made of the same material or different materials.

[0063] For example, the sealing ring 540 and the second body 510 can be fixedly connected by adhesive connection or integral molding.

[0064] Before assembling the second insulating member 500 with the cover body 100, the sealing ring 540 can be aligned with the pole hole 140. As the second body 510 approaches the second plate surface 120, the protruding sealing ring 540 gradually inserts into the pole hole 140. When the second body 510 is in contact with the second plate surface 120, the sealing ring 540 is also installed in the preset position in the pole hole 140.

[0065] Afterwards, the pole 200 can be inserted into the inner hole of the sealing ring 540 from the side of the second insulating member 500 away from the cover body 100. During the insertion of the pole 200, the force exerted by the pole 200 on the sealing ring 540 will push the second body 510 toward the second plate surface 120 to avoid separation of the second body 510 and the second plate surface 120, thereby ensuring a reliable connection between the second insulating member 500 and the cover body 100.

[0066] In this embodiment, since the sealing ring 540 is fixedly connected to the second body 510, once the second insulating member 500 and the cover plate body 100 are assembled, the sealing ring 540 is automatically installed within the terminal hole 140, eliminating the need for a separate installation step. This effectively simplifies the assembly process, reduces assembly time, and lowers assembly costs. After the terminal 200 is installed within the inner hole of the sealing ring 540, the sealing ring 540, which is mounted on the outer periphery of the terminal 200, effectively seals the gap between the terminal 200 and the wall of the terminal hole 140, ensuring the sealing performance of the entire cover plate assembly.

[0067] like Figure 9In some embodiments, the sealing ring 540 is integrally connected to the second body 510 .

[0068] Designing the sealing ring 540 and the second body 510 to be an integrally formed structure can, on the one hand, improve the connection strength between the sealing ring 540 and the second body 510; on the other hand, it can also reduce the difficulty of preparing the second insulating member 500.

[0069] like Figure 5 In some embodiments, the circumferential outer wall of the sealing ring 540 and the hole wall of the second through hole 530 are spaced apart to form a first gap 560, and a cantilever beam 550 is provided in the first gap 560, and the two ends of the cantilever beam 550 are respectively connected to the sealing ring 540 and the second body 510.

[0070] Exemplarily, the two ends of the suspension beam 550 are respectively connected to the circumferential outer wall of the sealing ring 540 and the hole wall of the second through hole 530, so as to reduce the length of the suspension beam 550 and reduce the manufacturing cost.

[0071] Exemplarily, at least two, such as two, three, four or five, suspension beams 550 are evenly arranged around the sealing ring 540 , so that the force exerted by the suspension beams 550 on the sealing ring 540 can be more uniform.

[0072] The connection between the second body 510 and the sealing ring 540 is achieved through the cantilever beam 550, which can reduce the total connection area between the two while ensuring a reliable connection between the two. The above structure not only helps reduce costs, but also because the second insulating member 500 is located inside the battery housing, when the bare battery cell generates heat during operation, the larger second body 510 is more susceptible to heat deformation. When the connection area between the second body 510 and the sealing ring 540 is small, even if the second body 510 is deformed by heat, the sealing ring 540 will not deform significantly with the second body 510, which helps to ensure the sealing performance of the sealing ring 540.

[0073] like Figure 9 In some embodiments, the cover assembly includes a pole base plate 210 fixedly connected to the pole 200 . The pole base plate 210 is located on a side of the second body 510 away from the cover body 100 and is non-rotatably connected to the second insulating member 500 .

[0074] For example, the pole bottom plate 210 and the pole 200 may be connected by welding or integral molding to achieve a fixed connection.

[0075] Illustratively, the pole bottom plate 210 is electrically connected to the pole 200 , and the pole bottom plate 210 can be used to electrically connect to the adapter or the tab of the bare cell.

[0076] For example, in order to achieve non-rotational connection between the pole bottom plate 210 and the second insulating member 500, as shown in FIG. Figure 9 A polygonal second positioning groove 570 can be provided on the surface of the second body 510 on the side away from the cover body 100, and the pole base plate 210 is at least partially installed in the second positioning groove 570 along the thickness direction, and the circumferential outer contour of the pole base plate 210 matches the second positioning groove 570.

[0077] Since the pole 200 is fixedly connected to the pole base plate 210, the pole base plate 210 is designed to be non-rotatably connected to the second insulating member 500, which can avoid relative rotation between the pole base plate 210 and the cover plate body 100, thereby ensuring the overall insulation and sealing performance of the cover plate assembly.

[0078] like Figure 9 In some embodiments, the first body 410 is provided with a first through hole 430 corresponding to the pole hole 140, and the first through hole 430 is used to pass the pole 200; the cover assembly includes a rivet 300 connected to the pole 200, and the rivet 300 is located on a side of the first body 410 away from the cover body 100, and is non-rotatably connected to the first insulating member 400.

[0079] For example, the rivet 300 is connected to the pole 200 by riveting.

[0080] For example, the rivet 300 can be used to electrically connect to an external circuit (for example, by bonding, welding, or contact connection).

[0081] For example, in order to achieve a non-rotational connection between the rivet 300 and the second insulating member 500, as shown in FIG. Figure 9 A polygonal first positioning groove 440 can be provided on the surface of the first body 410 on the side away from the cover body 100, and the rivet 300 is at least partially installed in the first positioning groove 440 along the thickness direction, and the circumferential outer contour of the rivet 300 matches the first positioning groove 440.

[0082] Designing the rivet 300 to be non-rotatably connected to the first insulating member 400 can avoid relative rotation between the rivet 300 and the cover body 100, ensure the overall insulation and sealing performance of the cover assembly, and at the same time, ensure that the pole 200 can form a reliable electrical connection with the external circuit.

[0083] Based on the same inventive concept and in combination with the description of the cover assembly of each of the above embodiments, this embodiment provides a battery having the corresponding technical effects of the cover assembly of each of the above embodiments, which will not be described in detail here.

[0084] A battery includes the cover plate assembly according to the above embodiments.

[0085] In some embodiments, the battery includes bare cells, and the second surface 120 of the cover plate body 100 is close to the bare cells.

[0086] The second insulating member 500 and the terminal bottom plate 210 may be installed inside the battery housing, and the first insulating member 400 and the rivet 300 may be located outside the battery housing.

[0087] It should be noted that the above description is limited to some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0088] The various embodiments in this application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0089] The description of this application is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the application and to enable those skilled in the art to understand the application and design various embodiments with various modifications suitable for specific applications.

[0090] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0091] While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0092] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A cover plate assembly, characterized in that: include: The cover plate body comprises a first plate surface and a second plate surface arranged opposite to each other in a thickness direction, wherein the cover plate body is provided with a positioning hole penetrating the first plate surface and the second plate surface; a first insulating member, comprising a first body and a positioning protrusion fixedly connected to the first body, the first body being connected to the first plate surface of the cover body, the positioning protrusion passing through the cover body through the positioning hole, so that the cover body and the first insulating member are non-rotatably connected; The second insulating member includes a second main body, which is connected to the second plate surface of the cover plate main body and is provided with a connecting hole matching the positioning protrusion; the second main body is connected to the positioning protrusion through the connecting hole so that the second insulating member is non-rotatably connected to the first insulating member.

2. The cover plate assembly according to claim 1, wherein: The connecting hole is a blind hole.

3. The cover plate assembly according to claim 1, wherein: At least two positioning protrusions are provided.

4. The cover plate assembly according to claim 1, wherein: The positioning protrusion is integrally formed and connected to the first body.

5. The cover plate assembly according to claim 1, wherein: The cover plate assembly includes a pole, the cover plate body is provided with a pole hole passing through the first plate surface and the second plate surface; the second body is provided with a second through hole corresponding to the pole hole; The second body is fixedly connected to a ring-shaped sealing ring, which is radially located in the second through hole and axially protrudes from the surface of the second body close to the cover body. The sealing ring is axially partially penetrated into the pole hole, and the pole is penetrated into the inner hole of the sealing ring.

6. The cover plate assembly according to claim 5, wherein: The sealing ring is integrally connected to the second body.

7. The cover plate assembly according to claim 5, wherein: The circumferential outer wall of the sealing ring is spaced apart from the hole wall of the second through hole to form a first gap. A cantilever beam is provided in the first gap. Two ends of the cantilever beam are respectively connected to the sealing ring and the second body.

8. The cover plate assembly according to claim 5, wherein: The cover plate assembly includes a pole bottom plate fixedly connected to the pole, the pole bottom plate is located on a side of the second body away from the cover plate body, and is non-rotatably connected to the second insulating member.

9. The cover plate assembly according to claim 5, wherein: The first body is provided with a first through hole corresponding to the pole hole, and the first through hole is used to pass the pole; the cover plate assembly includes a rivet connected to the pole, and the rivet is located on a side of the first body away from the cover plate body and is non-rotatably connected to the first insulating member.

10. A battery, characterized in that: Comprising the cover plate assembly according to any one of claims 1 to 9.

11. The battery according to claim 10, characterized in that The battery includes a bare cell, and the second plate surface of the cover plate body is close to the bare cell.

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