Riveted structure and battery cover

Abstract

The present application relates to the field of lithium battery technology, and in particular to a riveting structure and a battery cover. The riveting structure includes a pole and a riveting block; the riveting block includes a first riveting hole; the pole includes a first riveting portion that is gap-matched with the first riveting hole; the first riveting portion includes a cylindrical portion and a truncated cone portion; the cylindrical portion is located in the upper section of the first riveting hole; the truncated cone portion is located in the lower section of the first riveting hole, and the diameter of the truncated cone portion gradually decreases from the bottom to the top of the truncated cone portion; the edge of the bottom surface of the truncated cone portion is gap-matched with the first riveting hole, and the diameter of the top surface of the truncated cone portion is equal to the diameter of the cylindrical portion. According to the riveting structure and battery cover of the present application, the problem of the traditional lithium battery cover that when the pole and the riveting block are riveted, the gap between the two does not meet the requirements is solved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium batteries, and in particular to a riveting structure and a battery cover. Background Art

[0002] As lithium-ion battery technology matures, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing. The lithium battery cover is a key component in lithium-ion batteries. Its functions include welding with the shell to form a sealed cavity, leading out the positive and negative electrodes of the electrode group, and serving as an assembly carrier.

[0003] The conventional lithium battery cover plate includes a riveted structure of a pole and a riveted block. When the pole and the riveted block are riveted, the riveted block is easily deformed by being squeezed because the riveted block is generally made of aluminum.

[0004] The pole and rivet block of the traditional lithium battery cover are assembled with a gap that is even. When the pole and the rivet block are riveted, the upper part of the pole expands (deforms) relatively more, so the gap is often insufficient, causing the rivet block to expand outward, resulting in a width error. At the same time, since the lower part of the pole expands (deforms) relatively less, the gap is often too large, causing the pole and the rivet to be loosely in contact, affecting the overall conductivity. Summary of the invention

[0005] The purpose of the present application is to provide a riveting structure and a battery cover plate, thereby solving the above-mentioned problems existing in the traditional lithium battery cover plate when the pole and the riveting block are riveted.

[0006] According to the first aspect of the present application, a riveting structure is provided, which includes a pole and a riveting block; the riveting block includes a first riveting hole; the pole includes a first riveting portion that is gap-matched with the first riveting hole; the first riveting portion includes a cylindrical portion and a frustum portion; the cylindrical portion is located in the upper section of the first riveting hole; the frustum portion is located in the lower section of the first riveting hole, and the diameter of the frustum portion gradually decreases from the bottom to the top of the frustum portion; the edge of the bottom surface of the frustum portion is gap-matched with the first riveting hole, and the diameter of the top surface of the frustum portion is equal to the diameter of the cylindrical portion.

[0007] In any of the above technical solutions, further, the pole also includes a second rivet portion connected to the top end of the cylindrical portion; the rivet block also includes a second rivet hole coaxial with the first rivet hole; the diameter of the second rivet hole is larger than the diameter of the first rivet hole, and the second rivet hole and the second rivet portion are loosely matched.

[0008] In any of the above technical solutions, further, (d2-d) / H=0.3~0.5; wherein the second riveted portion is cylindrical, d2 is the diameter of the second riveted hole, d is the diameter of the second riveted portion, and H is the thickness of the riveted block.

[0009] In any of the above technical solutions, further, (d1-d3) / d3=0.1~0.2; wherein d1 is the diameter of the first riveting hole, and d3 is the diameter of the cylindrical portion.

[0010] In any of the above technical solutions, further, the taper of the frustum portion is 30° to 75°.

[0011] In any of the above technical solutions, further, the taper of the truncated cone portion is 45°.

[0012] In any of the above technical solutions, further, a gap between an edge of the bottom surface of the truncated cone portion and the first rivet hole is 0.05 mm to 0.1 mm.

[0013] In any of the above technical solutions, further, the bottom of the first riveting hole is provided with a chamfer; and the gap between the truncated cone portion and the chamfer is 0.05 mm to 0.1 mm.

[0014] According to a second aspect of the present application, a battery cover is provided, comprising the riveting structure as described above.

[0015] In any of the above technical solutions, further, the battery cover plate also includes an upper plastic part, a top cover sheet and a lower plastic part; the pole also includes a middle part connected to the bottom surface of the truncated cone part, and a base connected to the bottom surface of the middle part; the pole passes through the lower plastic part, the top cover sheet, the upper plastic part and the riveting block in sequence; wherein the second riveted portion of the pole cooperates with the second riveted hole, the first riveted portion of the pole cooperates with the first riveted hole, the middle part of the pole cooperates with the through holes of the upper plastic part, the top cover sheet and the lower plastic part, and the base of the pole fits the bottom surface of the lower plastic part.

[0016] The riveted structure of the present application includes a pole and a riveted block. The riveted block includes a first riveted hole; the pole includes a first riveted portion that is gap-matched with the first riveted hole; the first riveted portion includes a cylindrical portion and a truncated cone portion. The cylindrical portion is located at the upper section of the first riveted hole; the truncated cone portion is located at the lower section of the first riveted hole, and the diameter of the truncated cone portion gradually decreases from the bottom to the top of the truncated cone portion; the edge of the bottom surface of the truncated cone portion is gap-matched with the first riveted hole, and the diameter of the top surface of the truncated cone portion is equal to the diameter of the cylindrical portion.

[0017] According to the above technical features, the beneficial effects of this application are:

[0018] From the bottom to the top, the diameter of the first riveted part (the truncated cone part and the cylindrical part) of the present application gradually decreases, and after decreasing to a certain extent, the diameter remains unchanged; that is, from the bottom to the top, the gap between the first riveted part and the inner wall of the first riveted hole gradually increases, and after increasing to a certain extent, it remains unchanged. In this way, because the gap in the upper part of the first riveted hole of the present application is relatively large, when the upper part of the first riveted part expands, compared with the prior art, the first riveted hole will not be squeezed to cause the riveted block to expand outward, causing the width to exceed the tolerance. At the same time, because the gap in the lower part of the first riveted hole of the present application is relatively small, when the lower part of the first riveted part expands, compared with the prior art, the first riveted part will not be in loose contact with the first riveted hole, affecting the overall conductive performance.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram showing an exploded structure of a battery cover according to an embodiment of the present application;

[0022] Figure 2 The overall structure schematic diagram of the battery cover of the embodiment of the present application is shown;

[0023] Figure 3 Show Figure 2 A top view of

[0024] Figure 4 Show Figure 3 AA cross-sectional diagram of the pole before riveting;

[0025] Figure 5 Show Figure 3 AA cross-sectional diagram of the pole after riveting;

[0026] Figure 6 A top view of a pole according to an embodiment of the present application is shown;

[0027] Figure 7 Show Figure 6 DD cross-sectional diagram;

[0028] Figure 8A top view of a riveting block according to an embodiment of the present application is shown;

[0029] Fig. 9 Show Figure 8 Schematic diagram of CC cross section;

[0030] Fig.10 Show Figure 8 Schematic diagram of CC cross section;

[0031] Fig.11 A top view of a battery cover plate of the prior art is shown;

[0032] Fig.12 Show Fig.11 EE cross-sectional diagram of the pole before riveting;

[0033] Fig.13 Show Fig.11 EE cross-sectional diagram of the pole after riveting;

[0034] Fig.14 A top view showing a prior art pole;

[0035] Fig.15 Show Fig.14 AA cross-sectional diagram of ;

[0036] Fig.16 A top view of a prior art riveting block is shown;

[0037] Fig.17 Show Fig.16 Schematic diagram of FF cross section.

[0038] Icon: 10-uniform gap; 100-pole; 101-first riveted part; 1011-cylindrical part; 1012-conical part; 102-second riveted part; 103-middle part; 104-base; 200-riveted block; 201-first riveted hole; 2011-chamfer; 202-second riveted hole; 300-upper plastic part; 400-top cover piece; 500-lower plastic part; 600-sealing ring. DETAILED DESCRIPTION

[0039] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0040] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0041] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0042] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0043] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0044] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0045] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0046] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0047] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0048] Before this application was proposed, the pole and rivet block of the traditional lithium battery cover were assembled with a gap fit, and the gap was uniform. Therefore, when the pole and the rivet block were riveted, the upper part of the pole expanded (deformed) relatively more, so the gap was insufficient, causing the rivet block to expand outward, resulting in a width error. At the same time, since the lower part of the pole expanded (deformed) relatively less, the gap was too large, causing the pole and the rivet to be loosely in contact, affecting the overall conductive performance.

[0049] In view of this, the first aspect of the present application provides a riveting structure, thereby solving the above-mentioned problems existing when the pole and the riveting block are riveted in the traditional lithium battery cover.

[0050] Refer to the following Figures 1 to 10The riveted structures described in some embodiments of the present application are described in detail.

[0051] like Figures 1 to 9 As shown, the riveting structure of the present application includes a pole 100 and a riveting block 200. The riveting block 200 includes a first riveting hole 201 (see Fig. 9 ); The pole 100 includes a first riveted portion 101 that is clearance-matched with the first riveted hole 201; The first riveted portion 101 includes a cylindrical portion 1011 and a truncated cone portion 1012 (see Figure 4 , Figure 4 100 is a state before riveting). The cylindrical portion 1011 is located at the upper section of the first riveting hole 201; the truncated cone portion 1012 is located at the lower section of the first riveting hole 201, and the diameter of the truncated cone portion 1012 gradually decreases from the bottom to the top of the truncated cone portion 1012; the edge of the bottom surface of the truncated cone portion 1012 is gap-matched with the first riveting hole 201, and the diameter of the top surface of the truncated cone portion 1012 is equal to the diameter of the cylindrical portion 1011.

[0052] So, like Figure 4 As shown, from the bottom to the top, the diameter of the first riveted part 101 (the truncated cone part 1012 and the cylindrical part 1011) of the present application gradually decreases, and after decreasing to a certain extent, the diameter remains unchanged; that is, from the bottom to the top, the gap between the first riveted part 101 and the inner wall of the first riveted hole 201 gradually increases, and after increasing to a certain extent, it remains unchanged. In this way, because the gap at the upper part of the first riveted hole 201 of the present application is relatively large, when the upper part of the first riveted part 101 expands, compared with the prior art, the first riveted hole 201 will not be squeezed to cause the riveted block to expand outward, resulting in a problem of width deviation. At the same time, because the gap at the lower part of the first riveted hole 201 of the present application is relatively small, when the lower part of the first riveted part 101 expands, compared with the prior art, the first riveted part 101 will not be in loose contact with the first riveted hole 201, affecting the overall conductive performance.

[0053] The specific dimensional improvements of the pole of the present application compared with the prior art will be described in detail below.

[0054] Figure 11-Figure 17 FIG. 1 is a schematic diagram of the assembly of a pole in the prior art. Fig.12 As shown, in the prior art, the pole 100 and the riveting block 200 are assembled with clearance, and the uniform gap 10 between the two is 0.05mm~0.15mm. Fig.17 As shown, the diameter of the first riveting hole 201 of the riveting block 200 is d1. Fig.15 As shown, the height of the first riveted portion 101 of the pole 100 is h, and the diameter is d, that is, d1-d=0.05mm-0.15mm.

[0055] However, in the prior art, the upper part of the uniform gap 10 has insufficient gap, causing the material in this area to bulge outward, resulting in a width problem; the lower part of the uniform gap 10 has excessive gap, resulting in loose contact between the pole and the rivet, affecting the overall conductive performance.

[0056] In view of this, in the embodiment of the present application, (d1-d3) / d3=0.1-0.2; wherein d1 is the diameter of the first riveting hole 201 , and d3 is the diameter of the cylindrical portion 1011 .

[0057] Specifically, Fig.10 As shown, d1 is the diameter of the first rivet hole 201 of the rivet block 200, and h1 is the height of the first rivet hole 201; Figure 7 As shown, d3 is the diameter of the cylindrical portion 1011 of the pole 100 .

[0058] Thus, (d1-d3) / d3=0.1-0.2, so that the gap between the first riveting hole 201 and the cylindrical portion 1011 can not only have enough space for material expansion to prevent the cover plate from exceeding the qualified range (for example, Figure 5 As shown, the width B of the riveting block 200 or the upper plastic part 300 exceeds the qualified range); at the same time, the gap between the first riveting hole 201 and the cylindrical part 1011 can be not too large, so as to avoid the cylindrical part 1011 not being able to fit tightly against the wall of the first riveting hole 201 after the material expands, resulting in a large resistance value between the riveting block 200 and the bottom of the pole 100 (the base 104 of the pole 100) causing overheating during charging and discharging.

[0059] The specific data is as follows:

[0060] Case 1, the total width of the cover plate riveting position, that is, the width of the upper plastic part 300 B = 12.5 ± 0.2 mm, the diameter d1 of the first riveting hole 201 = 7 mm, adjust the diameter d3 of the cylindrical part 1011 of the pole 100 to see the change in width and resistance value:

[0061]

[0062] Case 2, the total width of the cover plate riveting position, that is, the width of the upper plastic part 300 B = 13.5 ± 0.2 mm, the diameter d1 of the first riveting hole 201 = 7.5 mm, adjust the diameter d3 of the cylindrical part 1011 of the pole 100 to see the change in width and resistance value:

[0063]

[0064] Case 3, the total width of the riveted position of the cover plate, that is, the width of the upper plastic part 300 is B=13±0.2mm, the diameter d1 of the first riveted hole 201 is 7.5mm, and the diameter d3 of the cylindrical part 1011 of the pole 100 is adjusted to see the changes in the width dimension and the resistance value:

[0065]

[0066] From the above cases, it can be seen that when the spatial dimension of the secondary riveting area in the diameter direction satisfies (d1-d3) / d3=0.1~0.2, the resistance value between the riveted material (the riveted material of the cylindrical part 1011) and the pole 100 and the riveted block 200 meets the requirements. The resistance between the upper surface of the riveted block 200 and the bottom of the pole 100 (the base 104 of the pole 100) is less than 0.035mΩ (milliohm).

[0067] If (d1-d3) / d3>0.2, it means that the gap between the first rivet hole 201 and the cylindrical portion 1011 is too large, resulting in a large resistance and causing overheating during charging and discharging.

[0068] If (d1-d3) / d3<0.1, it means that the gap between the first rivet hole 201 and the cylindrical portion 1011 is too small, resulting in the problem that the width B of the upper plastic part 300 exceeds the qualified range.

[0069] Therefore, when the gap between the first rivet hole 201 and the cylindrical portion 1011 satisfies (d1-d3) / d3=0.1-0.2, the resistance requirement and the size requirement of the width B of the upper plastic part 300 can be met at the same time.

[0070] Further, in the embodiments of the present application, Figure 7 As shown, the taper of the truncated cone portion 1012 is 30° to 75°. Preferably, the taper of the truncated cone portion 1012 is 45°.

[0071] Furthermore, the gap between the edge of the bottom surface of the truncated cone portion 1012 and the first rivet hole 201 is 0.05 mm to 0.1 mm.

[0072] In this way, the gap between the first riveting hole 201 and the cylindrical portion 1011 and the conical portion 1012 not only has enough space for material expansion to prevent the cover plate from exceeding the qualified range; at the same time, the gap between the first riveting hole 201 and the cylindrical portion 1011 (as well as the gap between the first riveting hole 201 and the conical portion 1012) can be not too large, so as to avoid the cylindrical portion 1011 and the conical portion 1012 being unable to fit tightly against the wall of the first riveting hole 201 after material expansion, resulting in a large resistance value between the riveting block 200 and the bottom of the pole 100 (the base 104 of the pole 100) causing overheating during charging and discharging.

[0073] Further, in the embodiments of the present application, Figure 4 As shown, the bottom of the first riveting hole 201 is provided with a chamfer 2011; the gap between the truncated cone portion 1012 and the chamfer 2011 is 0.05 mm to 0.1 mm. When the pole 100 is riveted, the chamfer 2011 facilitates the axial positioning of the pole 100.

[0074] In addition, in the embodiments of the present application, Fig. 9 As shown, the riveting block 200 further includes a second riveting hole 202 coaxial with the first riveting hole 201; Figure 4 and Figure 5 As shown, the pole 100 further includes a second riveted portion 102 connected to the top end of the cylindrical portion 1011 , wherein the diameter of the second riveted hole 202 is greater than the diameter of the first riveted hole 201 , and the second riveted hole 202 cooperates with the second riveted portion 102 .

[0075] In the embodiments of the present application, (d2-d) / H=0.3~0.5.

[0076] Specifically, Fig.10 As shown, d2 is the diameter of the second rivet hole 202, and H is the thickness of the rivet block 200, that is, H is the sum of the thickness h1 of the first rivet hole 201 and the thickness h2 of the second rivet hole 202. Figure 7 As shown, the second riveted portion 102 is cylindrical, and d is the diameter of the second riveted portion 102 .

[0077] Thus, when (d2-d) / H=0.3-0.5, the gap between the second rivet hole 202 and the second rivet portion 102 can not only provide enough space for material expansion to prevent the cover plate from exceeding the qualified range (for example, Figure 5 As shown, the width B of the riveting block 200 or the upper plastic part 300 exceeds the qualified range); at the same time, the gap between the second riveting hole 202 and the second riveting portion 102 can be not too large, so as to avoid the second riveting portion 102 failing to adhere closely to the wall of the second riveting hole 202 after swelling, resulting in a large resistance value between the riveting block 200 and the bottom of the pole 100 (the base 104 of the pole 100) causing overheating during charging and discharging.

[0078] In summary, the dimension design of the pole 100 of the present application, that is, the diameter-direction spatial dimensions of the riveting block 200 and the pole 100 both meet the material expansion requirements and the resistance value requirements.

[0079] According to a second aspect of the present application, a battery cover is provided, and the battery cover includes the riveting structure as described above.

[0080] Furthermore, if Figure 1 and Figure 2 As shown, the battery cover also includes an upper plastic part 300 (upper plastic), a top cover sheet 400 and a lower plastic part 500 (lower plastic). Figure 4 As shown, the pole 100 further includes a middle portion 103 connected to the bottom surface of the truncated cone portion 1012 and a base 104 connected to the bottom surface of the middle portion 103 , wherein the cylindrical portion 1011 , the truncated cone portion 1012 , the middle portion 103 and the base 104 of the pole 100 are integrally formed.

[0081] like Figure 1 and Figure 2 As shown, the pole 100 passes through the lower plastic part 500, the top cover sheet 400, the upper plastic part 300 and the riveting block 200 in sequence; wherein, the second riveting portion 102 of the pole 100 cooperates with the second riveting hole 202, the first riveting portion 101 of the pole 100 cooperates with the first riveting hole 201, the middle portion 103 of the pole 100 cooperates with the through holes of the upper plastic part 300, the top cover sheet 400 and the lower plastic part 500, and the base 104 of the pole 100 fits the bottom surface of the lower plastic part 500.

[0082] Furthermore, the battery cover also includes a sealing ring 600, such as Figure 1 , Figure 4 and Figure 5 As shown, the sealing ring 600 includes a first ring portion, a second ring portion and a third ring portion from top to bottom. The first ring portion is sealed between the upper plastic part 300 and the pole 100; the second ring portion is sealed between the top cover sheet 400 and the pole 100; and the third ring portion is sealed between the lower plastic part 500 and the pole 100.

[0083] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. A riveted structure, characterized in that: The riveted structure comprises a pole and a riveted block; The riveting block comprises a first riveting hole; The pole comprises a first riveting portion which is gap-matched with the first riveting hole; The first riveting portion includes a cylindrical portion and a truncated cone portion; The cylindrical portion is located at the upper section of the first riveting hole; The truncated cone portion is located at the lower section of the first riveting hole, and the diameter of the truncated cone portion gradually decreases from the bottom to the top of the truncated cone portion; The edge of the bottom surface of the truncated cone portion is loosely matched with the first rivet hole, and the diameter of the top surface of the truncated cone portion is equal to the diameter of the cylindrical portion; (d1-d3) / d3=0.1~0.2; wherein d1 is the diameter of the first riveting hole, and d3 is the diameter of the cylindrical portion; The taper of the truncated cone portion is 30° to 75°; The pole also includes a second riveted portion connected to the top end of the cylindrical portion; The riveting block further includes a second riveting hole coaxial with the first riveting hole; The diameter of the second riveting hole is greater than the diameter of the first riveting hole, and the second riveting hole and the second riveting portion are loosely matched; (d2-d) / H=0.3~0.5; The second riveting portion is cylindrical, d2 is the diameter of the second riveting hole, d is the diameter of the second riveting portion, and H is the thickness of the riveting block.

2. The riveted structure according to claim 1, characterized in that: The taper of the truncated cone portion is 45°.

3. The riveted structure according to claim 1, characterized in that: A gap between an edge of the bottom surface of the truncated cone portion and the first rivet hole is 0.05 mm to 0.1 mm.

4. The riveted structure according to claim 1, characterized in that: The bottom of the first riveting hole is provided with a chamfer; The gap between the truncated cone portion and the chamfer is 0.05 mm to 0.1 mm.

5. A battery cover, characterized in that: The battery cover plate includes the riveted structure as claimed in any one of claims 1 to 4.

6. The battery cover according to claim 5, characterized in that: The battery cover plate also includes an upper plastic part, a top cover sheet and a lower plastic part; The pole also includes a middle portion connected to the bottom surface of the truncated cone portion, and a base connected to the bottom surface of the middle portion; The pole passes through the lower plastic part, the top cover sheet, the upper plastic part and the riveting block in sequence; The second riveted portion of the pole cooperates with the second riveted hole, the first riveted portion of the pole cooperates with the first riveted hole, the middle portion of the pole cooperates with the through holes of the upper plastic part, the top cover sheet and the lower plastic part, and the base of the pole fits the bottom surface of the lower plastic part.

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