Battery cover plate and battery

Abstract

The application provides a battery cover plate and a battery. The battery cover plate comprises a cover plate body provided with a mounting hole; a pole column assembly arranged in the mounting hole, the pole column assembly comprising a pole column top plate arranged on a side of the cover plate body away from a pole group of the battery, an annular gap being formed in an edge of a top surface of the pole column top plate; a first insulating piece comprising a first insulating sheet, a middle insulating sleeve and a second insulating sheet connected in sequence, the first insulating sheet being arranged between the cover plate body and a bottom surface of the pole column top plate, the middle insulating sleeve being wrapped outside a peripheral surface of the pole column top plate, the second insulating sheet being arranged in the annular gap and a top surface of the second insulating sheet being located on a side of the top surface of the pole column top plate close to the cover plate body; the bottom surface of the pole column top plate is a plane of the pole column top plate close to the cover plate body, the top surface of the pole column top plate is a plane of the pole column top plate away from the cover plate body, and the top surface of the second insulating sheet is a plane of the second insulating sheet away from the cover plate body. The application realizes the reduction of the short circuit caused by the metal wire lapping the cover plate under the premise of avoiding the influence on the electrical connection between the pole column and the bus bar.

Description

Technical Field

[0001] This application relates to the field of battery component technology, specifically to a battery cover, and also to a battery including the aforementioned battery cover. Background Technology

[0002] Lithium-ion battery packaging typically consists of a battery casing and a battery cover. The battery cover is connected to the opening of the battery casing and, together with the battery casing, forms a cavity for accommodating the electrode assembly. The electrode assembly is housed within this cavity. The battery cover mainly comprises a cover plate, positive and negative terminals, a filling hole, an explosion-proof valve, an insulating sheet, and a retaining bracket. In the module, one side of the battery cover's terminal is electrically connected to the corresponding tab of the electrode assembly, and the other side is electrically connected to the busbar, enabling the conduction of electrical energy during battery charging and discharging.

[0003] To avoid affecting the electrical connection between the terminal and the busbar, the connection point is generally not insulated. However, metal wires are easily generated at the edge of the electrical connection between the terminal and the busbar due to assembly, processing or transportation. This can easily cause the metal wires to overlap the cover plate and cause a short circuit, affecting the reliability of operation. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cover that reduces the occurrence of short circuits caused by metal wires overlapping the cover, thereby improving operational reliability, while avoiding affecting the electrical connection between the terminal and the busbar.

[0005] The purpose of this application is also to provide a battery including the above-mentioned battery cover, so as to reduce the occurrence of short circuits caused by metal wires overlapping the cover while avoiding affecting the electrical connection between the terminal and the busbar, thereby improving the reliability of operation.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A battery cover, comprising:

[0008] The cover plate body is provided with mounting holes;

[0009] The electrode assembly is fixedly installed in the mounting hole. The electrode assembly includes an electrode top plate disposed on the side of the cover plate body away from the battery. An annular notch is provided on the edge of the top surface of the electrode top plate.

[0010] The first insulating element includes a first insulating sheet, a middle insulating sleeve, and a second insulating sheet connected in sequence. The first insulating sheet is disposed between the cover plate body and the bottom surface of the pole post top plate. The middle insulating sleeve is wrapped around the outer periphery of the pole post top plate. The second insulating sheet is disposed in the annular notch, and the top surface of the second insulating sheet is located on the side of the top surface of the pole post top plate close to the cover plate body.

[0011] Wherein, the bottom surface of the pole post top plate is the plane of the pole post top plate close to the cover plate body, and the top surface of the pole post top plate is the plane of the pole post top plate away from the cover plate body;

[0012] The top surface of the second insulating sheet is the plane of the second insulating sheet away from the cover plate body.

[0013] Preferably, in the battery cover, the distance between the top surface of the second insulating sheet and the top surface of the electrode top plate is 0.1-1mm.

[0014] Preferably, in the battery cover, the first insulating sheet, the middle insulating sleeve, and the second insulating sheet are an integral structure.

[0015] Preferably, in the battery cover, the first insulating member and the terminal top plate are integrally injection molded.

[0016] Preferably, in the battery cover, the distance between the outer peripheral surface and the inner peripheral surface of the second insulating sheet is 0.5-5mm.

[0017] Preferably, in the above-mentioned battery cover plate, the terminal assembly further includes:

[0018] The pole base plate is disposed on the side of the cover plate body near the pole group;

[0019] The electrode body is inserted into the mounting hole. The electrode body and the first electrode plate are an integral structure, and the electrode body is threadedly connected to the second electrode plate.

[0020] Wherein, one of the pole base plate and the pole top plate is the first pole plate, and the other is the second pole plate;

[0021] The battery cover also includes:

[0022] The sealing ring includes a first sealing part and a second sealing part arranged vertically. The first sealing part seals and connects the pole body to the inner wall of the mounting hole, and the second sealing part seals and connects the cover plate body to the top surface of the pole base plate.

[0023] The second insulating component is stacked on the side of the cover plate body near the electrode assembly. The second insulating component is provided with a limiting groove that communicates with the mounting hole, and the electrode post base plate is limited within the limiting groove.

[0024] Preferably, in the above-mentioned battery cover plate, the electrode body includes:

[0025] The first column is disposed in the mounting hole;

[0026] The second column extends out of the mounting hole, and the second column is provided with external threads and has a diameter smaller than that of the first column.

[0027] The second electrode plate is provided with a threaded hole that mates with the external thread, and is axially positioned and engaged with the step formed by the first column and the second column.

[0028] Preferably, in the battery cover, the axial length of the external thread is 1-3.8 mm, and the axial length of the threaded hole is 1.2-4 mm.

[0029] Preferably, in the battery cover, the connecting end face of the electrode body away from the first electrode plate is located on the side of the outer plane of the second electrode plate away from the cover body and close to the cover body, and the distance between the connecting end face of the electrode body and the outer plane of the second electrode plate is greater than 0.2 mm.

[0030] As can be seen from the above technical solution, the battery cover provided in this application includes a cover body with mounting holes; a terminal post assembly fixedly disposed in the mounting holes, the terminal post assembly including a terminal post top plate disposed on the side of the cover body away from the battery, the top edge of the terminal post top plate having an annular notch; a first insulating element including a first insulating sheet, a middle insulating sleeve and a second insulating sheet connected in sequence, the first insulating sheet being disposed between the cover body and the bottom surface of the terminal post top plate, the middle insulating sleeve being wrapped around the outer periphery of the terminal post top plate, the second insulating sheet being disposed within the annular notch, and the top surface of the second insulating sheet being located on the side of the top surface of the terminal post top plate close to the cover body; wherein, the bottom surface of the terminal post top plate is the plane of the terminal post top plate close to the cover body, the top surface of the terminal post top plate is the plane of the terminal post top plate away from the cover body; the top surface of the second insulating sheet is the plane of the second insulating sheet away from the cover body.

[0031] The battery cover provided in this application is provided with a first insulating element. The first insulating sheet of the first insulating element is disposed between the cover body and the bottom surface of the terminal top plate, the middle insulating sleeve is wrapped around the outer periphery of the terminal top plate, and the second insulating sheet is disposed in the annular notch at the edge of the top surface of the terminal top plate. In this way, on the one hand, insulation can be achieved between the bottom surface, outer periphery, and top edge of the terminal top plate and the cover body. The cooperation of the middle insulating sleeve and the second insulating sheet increases the distance between the exposed conductive parts of the terminal top plate and the cover body, thereby improving the insulation performance between the metal wires generated by the exposed conductive parts of the terminal top plate and the cover body. On the other hand, the second insulating sheet covering the outer edge of the top surface of the terminal top plate can prevent the generation of metal wires at the edge of the top surface of the terminal top plate. Both aspects can reduce the possibility of metal wires overlapping the cover plate and causing short circuits, thereby improving the reliability of operation.

[0032] In addition, in the first insulating component provided in this application, the top surface of the second insulating sheet is located on the side of the top surface of the pole plate close to the cover plate body. That is to say, the top surface of the second insulating sheet is lower than the top surface of the pole plate. At this time, the second insulating sheet will not protrude from the top surface of the pole plate used for electrical connection, so it can avoid affecting the electrical connection between the pole and the bus.

[0033] Therefore, the battery cover provided in this application reduces the occurrence of short circuits caused by metal wires overlapping the cover, while avoiding affecting the electrical connection between the terminal post and the busbar, thereby improving operational reliability.

[0034] This application also provides a battery, including an electrode assembly and a battery cover disposed at one end of the electrode assembly. The battery cover is any of the battery cover types described above. Since the battery cover has the aforementioned effects, the battery with the aforementioned battery cover has the same effects, so it will not be described in detail here. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the battery cover provided in Embodiment 1 of this application;

[0037] Figure 2 This is an exploded structural diagram of the battery cover provided in Embodiment 1 of this application;

[0038] Figure 3 This is a top view of the battery cover provided in Embodiment 1 of this application;

[0039] Figure 4 For along Figure 3 Schematic diagram of the cross-sectional structure of line AA in the middle;

[0040] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0041] Figure 6 This is a schematic diagram of the integral structure of the pole post top plate and the first insulating component provided in Embodiment 1 of this application;

[0042] Figure 7 This is a schematic diagram of the integral structure of the pole post base plate and the pole post body provided in Embodiment 1 of this application;

[0043] Figure 8 This is a schematic diagram of the structure of the battery cover plate provided in Embodiment 2 of this application;

[0044] Figure 9 This is an exploded structural diagram of the battery cover provided in Embodiment 2 of this application;

[0045] Figure 10 This is a schematic diagram of the exploded structure of the battery cover after it has been flipped up and down, according to Embodiment 2 of this application.

[0046] Figure 11 This is a top view of the battery cover provided in Embodiment 2 of this application;

[0047] Figure 12 For along Figure 11 Schematic diagram of the cross-sectional structure of the middle BB line;

[0048] Figure 13 This is a schematic diagram of the integrated structure of the pole top plate, pole body, and first insulating component provided in Embodiment 2 of this application;

[0049] Figure 14 This is a schematic diagram of the structure of the pole base plate provided in Embodiment 2 of this application.

[0050] superior Figure 1-14 middle:

[0051] 1-Cover plate body, 2-Top plate of pole post, 3-Pole post body, 31-External thread, 4-First insulating component, 5-Second insulating component, 6-Bottom plate of pole post, 7-Sealing ring;

[0052] a - threaded hole, m - distance between the connecting end face of the pole body and the outer plane of the second pole plate, n - distance between the top surface of the second insulating sheet and the top surface of the pole plate, l - distance between the outer circumferential surface and the inner circumferential surface of the second insulating sheet. Detailed Implementation

[0053] This application provides a battery cover and a battery including the battery cover, which reduces the occurrence of short circuits caused by metal wires overlapping the cover while avoiding affecting the electrical connection between the terminal and the busbar, thereby improving operational reliability.

[0054] 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, and 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.

[0055] like Figures 1-14As shown, the battery cover provided in this embodiment includes a cover body 1 with mounting holes; a terminal post assembly fixedly disposed in the mounting holes, the terminal post assembly including a terminal post top plate 2 disposed on the side of the cover body 1 away from the battery, the top edge of the terminal post top plate 2 having an annular notch; a first insulating member 4 including a first insulating sheet, a middle insulating sleeve and a second insulating sheet connected in sequence, the first insulating sheet being disposed between the cover body 1 and the bottom surface of the terminal post top plate 2, the middle insulating sleeve being wrapped around the outer periphery of the terminal post top plate 2, the second insulating sheet being disposed in the annular notch, and the top surface of the second insulating sheet being located on the side of the top surface of the terminal post top plate 2 close to the cover body 1; wherein, the bottom surface of the terminal post top plate 2 is the plane of the terminal post top plate 2 close to the cover body 1, the top surface of the terminal post top plate 2 is the plane of the terminal post top plate 2 away from the cover body 1; the top surface of the second insulating sheet is the plane of the second insulating sheet away from the cover body 1.

[0056] The battery cover provided in this embodiment is provided with a first insulating element 4. The first insulating sheet of the first insulating element 4 is disposed between the cover body 1 and the bottom surface of the terminal top plate 2, the middle insulating sleeve is wrapped around the outer periphery of the terminal top plate 2, and the second insulating sheet is disposed in the annular notch at the edge of the top surface of the terminal top plate 2. In this way, on the one hand, insulation can be achieved between the bottom surface, outer periphery, and top edge of the terminal top plate 2 and the cover body 1. The cooperation of the middle insulating sleeve and the second insulating sheet increases the distance between the exposed conductive parts of the terminal top plate 2 and the cover body 1, thereby improving the insulation performance between the metal wires generated by the exposed conductive parts of the terminal top plate 2 and the cover body 1. On the other hand, the second insulating sheet covering the outer edge of the top surface of the terminal top plate 2 can prevent the generation of metal wires at the edge of the top surface of the terminal top plate 2. Both aspects can reduce the occurrence of short circuits caused by metal wires overlapping the cover, thereby improving the reliability of operation.

[0057] In addition, in the first insulating member 4 provided in this embodiment, the top surface of the second insulating sheet is located on the side of the top surface of the pole top plate 2 close to the cover plate body 1. That is to say, the top surface of the second insulating sheet is lower than the top surface of the pole top plate 2. At this time, the second insulating sheet will not protrude from the top surface of the pole top plate 2 used for electrical connection, so it can avoid affecting the electrical connection between the pole and the bus.

[0058] Therefore, the battery cover provided in this embodiment reduces the occurrence of short circuits caused by metal wires overlapping the cover, while avoiding affecting the electrical connection between the terminal post and the busbar, thereby improving operational reliability.

[0059] like Figure 5 and Figure 12As shown, in the battery cover provided in the above embodiment, the distance n between the top surface of the second insulating sheet and the top surface of the terminal top plate 2 is 0.1-1mm, that is, the second insulating sheet is 0.1-1mm lower than the terminal top plate 2. This can prevent the second insulating sheet from being higher than the surface of the terminal top plate 2, ensuring that the electrical connection between the terminal top plate 2 and the busbar is not affected, and can also avoid the annular notch at the edge of the top surface of the terminal top plate 2 being too large, thus affecting the edge strength of the terminal.

[0060] The distance n between the top surface of the second insulating sheet and the top surface of the pole plate 2 can be any value between 0.1 and 1 mm, such as 0.1 mm, 0.5 mm, or 1 mm.

[0061] To further optimize the above technical solution, in the battery cover provided in this embodiment, the first insulating sheet, the middle insulating sleeve, and the second insulating sheet are an integral structure. For example... Figure 4-6 , Figure 12-13 As shown in this embodiment, the three insulating parts of the first insulating member 4 are an integral structure. The first insulating sheet, the middle insulating sleeve, and the second insulating sheet do not require assembly, eliminating the assembly process. Furthermore, the three insulating parts are seamlessly connected, resulting in better insulation. It is understood that the three insulating parts can also be separate structures, such as each of the three insulating parts being independently set, or at least two insulating parts being integrally formed. In this case, the independent structures can be assembled separately, and then the insulating parts can be assembled together. During assembly, elastic deformation or bonding can be used to achieve a seamless fit between them, thus achieving a better insulation effect.

[0062] In a specific embodiment of the battery cover, the first insulating member 4 and the terminal top plate 2 are integrally injection molded. For example... Figure 6 and Figure 13 As shown, in this embodiment, the first insulating component 4 is a plastic component. The first insulating component 4 and the electrode top plate 2 are injection molded into an integral structure. At this time, there is no need for separate assembly between the two, which saves the assembly process and improves the connection strength, thus preventing the first insulating component 4 from detaching from the electrode top plate 2. Of course, the first insulating component 4 can also be fixedly connected to the electrode top plate 2 by other methods such as bonding or hot-melt connection, and this application does not make specific limitations in this regard.

[0063] In the battery cover provided in this embodiment, the distance l between the outer and inner circumferential surfaces of the second insulating sheet is 0.5-5 mm. For example... Figure 5 and Figure 12 As shown, the second insulating sheet is wrapped around the top edge of the pole plate 2 with a size of 0.5-5mm. This size can not only increase the distance between the exposed conductive part of the pole plate 2 and the cover plate body 1, and improve the insulation performance between the pole plate 2 and the cover plate body 1, thereby reducing the occurrence of short circuits caused by metal wires overlapping the cover plate, but also avoid the wrapping size being too large and affecting the electrical connection area of ​​the pole plate 2.

[0064] The distance l between the outer and inner circumferential surfaces of the second insulating sheet can be any value between 0.5 and 5 mm, such as 0.5 mm, 2 mm, or 4 mm.

[0065] In the battery cover provided in this application embodiment, the electrode assembly further includes an electrode base plate 6, which is disposed on the side of the cover body 1 near the electrode assembly; the electrode body 3 is inserted into the mounting hole, the electrode body 3 and the first electrode plate are integrally structured, and are threadedly connected to the second electrode plate; wherein, one of the electrode base plate 6 and the electrode top plate 2 is the first electrode plate, and the other is the second electrode plate.

[0066] The electrode assembly in this embodiment consists of an electrode top plate 2, an electrode bottom plate 6, and an electrode body 3. The electrode bottom plate 6 and the electrode top plate 2 can be used as the first electrode plate or the second electrode plate, respectively. Figure 1-7 As shown, in Embodiment 1, the electrode base plate 6 serves as the first electrode plate and is integrally formed with the electrode body 3, as follows: Figure 7 As shown; the top plate 2 of the pole post serves as the second pole plate and is threadedly connected to the pole post body 3, as shown. Figure 6 As shown, the pole top plate 2 has a threaded hole for connecting the pole body 3. During assembly, the pole body 3 of the pole assembly extends from the side of the cover plate body 1 near the pole group through the mounting hole to the side away from the pole group, and is then screwed onto the extended end of the pole body 3 by the pole top plate 2. At this time, there is no threaded hole on the pole bottom plate 6, the connection area is large, and the welding strength with the connecting piece or pole lug can be improved.

[0067] like Figure 8-14 As shown, in Embodiment 2, the top plate 2 of the pole post serves as the first pole post and is integrally formed with the pole post body 3, as follows: Figure 13 As shown; the electrode base plate 6 serves as the second electrode plate and is threadedly connected to the electrode body 3, as shown. Figure 14 As shown, the base plate 6 of the pole post has a threaded hole for connecting the pole post body 3. During assembly, the pole post body 3 of the pole post assembly extends from the side of the cover plate body 1 away from the pole group through the mounting hole to the side closer to the pole group, and is then screwed onto the extended end of the pole post body 3 by the base plate 6. At this time, there is no threaded hole on the top plate 2 of the pole post, the connection area is large, and the welding strength with the busbar can be improved.

[0068] In addition, the pole assembly of this application is fixed together by threads, which can avoid the risk of riveting cracks and improve the strength of the fixed connection.

[0069] like Figure 2 , Figure 4 , Figure 9-10 , Figure 12As shown, the battery cover also includes a sealing ring 7, which includes a first sealing part and a second sealing part arranged vertically. The first sealing part seals and connects the electrode body 3 with the inner wall of the mounting hole, and the second sealing part seals and connects the cover body 1 with the top surface of the electrode base plate 6. A second insulating member 5 is stacked on the side of the cover body 1 near the electrode group. The second insulating member 5 is provided with a limiting groove that communicates with the mounting hole, and the electrode base plate 6 is limited to the limiting groove.

[0070] In this embodiment, the first sealing part of the sealing ring 7 seals the connection between the pole body 3 and the inner wall of the mounting hole, and the second sealing part seals the connection between the cover plate body 1 and the top surface of the pole base plate 6, thus achieving sealing and insulation between the cover plate body 1, the pole body 3, and the pole base plate 6. The second insulating member 5 achieves insulation between the cover plate body 1 and the pole group, ensuring operational reliability. In addition, the limiting groove of the second insulating member 5 can limit the pole base plate 6, improving the fixing strength of the pole base plate 6.

[0071] Specifically, the second insulating component 5 is a plastic part that can be injection molded into one piece, making it easy to process.

[0072] like Figure 4-7 , Figure 12-14 As shown, preferably, the pole body 3 includes a first column disposed in the mounting hole; and a second column extending out of the mounting hole, the second column having an external thread 31 and a diameter smaller than that of the first column; wherein, the second pole plate has a threaded hole that mates with the external thread 31, and is axially positioned and engaged with the step formed by the first and second columns. In this embodiment, the pole body 3 uses a variable diameter column, and the step formed by the first and second columns with different diameters axially limits the threaded connection of the pole plate, improving the locking strength. Of course, the pole body 3 of this application can also be a column of equal diameter, and this is not specifically limited.

[0073] The axial length of the external thread 31 is 1-3.8 mm, and the axial length of the threaded hole is 1.2-4 mm. The axial length of the external thread 31 can be 1 mm, 2 mm, 3.8 mm, etc., and the axial length of the threaded hole can be 1.2 mm, 2 mm, 4 mm, etc. Specifically, the maximum axial length of the external thread 31 can be the axial dimension of the second column, and the maximum axial length of the threaded hole can be the axial dimension, i.e., the thickness, of the second electrode plate. This ensures the locking strength of the thread while reducing the axial space occupied by the electrode body 3.

[0074] Preferably, the connecting end face of the pole body 3 away from the first electrode plate is located on the side of the second electrode plate away from the outer plane of the cover plate body 1 and close to the cover plate body 1, and the distance m between the connecting end face of the pole body 3 and the outer plane of the second electrode plate is greater than 0.2 mm. The axial length of the external thread 31 can be 0.2 mm smaller than the axial length of the threaded hole, so that the height of the second electrode plate protruding outward relative to the pole body 3 is greater than 0.2 mm, preventing the pole body 3 from protruding beyond the second electrode plate and affecting the electrical connection of the second electrode plate; for example Figure 4 As shown, when the top plate 2 of the electrode post is used as the second electrode plate, it is important to avoid affecting the welding with the busbar; as Figure 12 As shown, when the base plate 6 of the pole post is used as the second pole plate, it avoids affecting the welding area with the connecting piece or the pole tab, thus improving the reliability of the electrical connection.

[0075] This application also provides a battery, including an electrode assembly and a battery cover plate disposed at one end of the electrode assembly. The battery cover plate is the battery cover plate provided in any of the above embodiments. It reduces the occurrence of short circuits caused by metal wires overlapping the cover plate while avoiding affecting the electrical connection between the terminal post and the busbar, thereby improving the reliability of operation. Its advantages are brought about by the battery cover plate. For details, please refer to the relevant parts in the above embodiments, which will not be repeated here.

[0076] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0077] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0078] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0079] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0080] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0081] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery cover, characterized in that, include: The cover plate body is provided with mounting holes; The electrode assembly is fixedly installed in the mounting hole. The electrode assembly includes an electrode top plate disposed on the side of the cover plate body away from the battery. An annular notch is provided on the edge of the top surface of the electrode top plate. The first insulating element includes a first insulating sheet, a middle insulating sleeve, and a second insulating sheet connected in sequence. The first insulating sheet is disposed between the cover plate body and the bottom surface of the pole post top plate. The middle insulating sleeve is wrapped around the outer periphery of the pole post top plate. The second insulating sheet is disposed in the annular notch, and the top surface of the second insulating sheet is located on the side of the top surface of the pole post top plate close to the cover plate body. Wherein, the bottom surface of the pole post top plate is the plane of the pole post top plate close to the cover plate body, and the top surface of the pole post top plate is the plane of the pole post top plate away from the cover plate body; The top surface of the second insulating sheet is the plane of the second insulating sheet away from the cover plate body.

2. The battery cover according to claim 1, characterized in that, The distance between the top surface of the second insulating sheet and the top surface of the pole plate is 0.1-1mm.

3. The battery cover according to claim 1, characterized in that, The first insulating sheet, the middle insulating sleeve, and the second insulating sheet are an integral structure.

4. The battery cover according to claim 1, characterized in that, The first insulating component is integrally injection molded with the top plate of the pole post.

5. The battery cover according to claim 1, characterized in that, The distance between the outer and inner circumferential surfaces of the second insulating sheet is 0.5-5 mm.

6. The battery cover according to claim 1, characterized in that, The pole assembly also includes: The pole base plate is disposed on the side of the cover plate body near the pole group; The electrode body is inserted into the mounting hole. The electrode body and the first electrode plate are an integral structure, and the electrode body is threadedly connected to the second electrode plate. Wherein, one of the pole base plate and the pole top plate is the first pole plate, and the other is the second pole plate; The battery cover also includes: The sealing ring includes a first sealing part and a second sealing part arranged vertically. The first sealing part seals and connects the pole body to the inner wall of the mounting hole, and the second sealing part seals and connects the cover plate body to the top surface of the pole base plate. The second insulating component is stacked on the side of the cover plate body near the electrode assembly. The second insulating component is provided with a limiting groove that communicates with the mounting hole, and the electrode post base plate is limited within the limiting groove.

7. The battery cover according to claim 6, characterized in that, The pole body includes: The first column is disposed in the mounting hole; The second column extends out of the mounting hole, and the second column is provided with external threads and has a diameter smaller than that of the first column. The second electrode plate is provided with a threaded hole that mates with the external thread, and is axially positioned and engaged with the step formed by the first column and the second column.

8. The battery cover according to claim 7, characterized in that, The axial length of the external thread is 1-3.8 mm, and the axial length of the threaded hole is 1.2-4 mm.

9. The battery cover according to any one of claims 6-8, characterized in that, The connecting end face of the pole body away from the first electrode plate is located on the side of the outer plane of the second electrode plate away from the cover plate body and close to the cover plate body, and the distance between the connecting end face of the pole body and the outer plane of the second electrode plate is greater than 0.2mm.

10. A battery, comprising an electrode assembly and a battery cover disposed at one end of the electrode assembly, characterized in that, The battery cover is the battery cover as described in any one of claims 1-9.

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