Cover plate and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a cover plate and a battery. The cover plate comprises: a cover plate body having a mounting hole; the pole comprises a pole body and a riveting press ring, at least part of the pole body is arranged in the mounting hole, the pole body is provided with a limiting part, the limiting part is arranged on the upper surface of the cover plate body, and the part, close to the lower surface of the cover plate body, of the pole body is connected with the riveting press ring; and the lower insulating part is arranged between the pole and the cover plate body, and the bottom surface of the riveting pressing ring does not protrude out of the bottom surface of the insulating part in the thickness direction of the cover plate. The riveting pressing ring is fixed at the lower end of the pole body, and the bottom surface of the riveting pressing ring does not protrude out of the bottom surface of the lower insulating part, so that the risk of insulation failure caused by lap joint of the battery cell and the cover plate is avoided; a larger space is provided for accommodating the tabs, so that the tabs can be bundled conveniently, and the tabs are prevented from being torn; and most or all of the riveting pressing rings are positioned in the mounting holes, so that the height of the pole is shortened, the space is saved in the vertical direction, and the space utilization rate of the battery is improved.

Description

Technical Field

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

[0002] Secondary batteries, also known as rechargeable batteries, are batteries that can be recharged after being discharged to activate the active materials and continue to be used.

[0003] Terminals are the wiring terminals in a battery, connecting the inside and outside of the battery. One end of the terminal is connected to the internal battery cell, and the other end is connected to the external circuit of the lithium battery, enabling the battery to perform charging and discharging functions.

[0004] Currently, poles generally consist of a pole body and a riveting ring. The riveting ring is riveted to the upper part of the pole body and is located outside the through hole on the cover plate. Poles occupy a large space in the height direction and have low space utilization. Utility Model Content

[0005] In view of this, the present invention provides a cover plate and a battery to solve the problem of the large space occupied by the electrode post in the height direction.

[0006] In a first aspect, this utility model provides a cover plate, comprising: a cover plate body having a mounting hole; an electrode post including an electrode post body and a riveting ring, wherein the electrode post body is at least partially disposed in the mounting hole, the electrode post body having a limiting portion disposed on the upper surface of the cover plate body, and the portion of the electrode post body near the lower surface of the cover plate body being connected to the riveting ring; and a lower insulating member disposed between the electrode post and the cover plate body, wherein along the thickness direction of the cover plate, the bottom surface of the riveting ring does not protrude from the bottom surface of the insulating member.

[0007] Secondly, the present invention also provides a battery, comprising: a casing having a first wall; the aforementioned cover plate disposed on the first wall; and a battery cell disposed within the casing.

[0008] Beneficial effects: The riveting ring is fixed to the lower end of the terminal body, and the bottom surface of the riveting ring does not protrude from the bottom surface of the lower insulation component, avoiding the risk of insulation failure caused by the overlap of the cell and the cover plate; at the same time, it provides more space to accommodate the tabs, which is conducive to the tabs being bundled and avoids the tabs being torn; most or all of the riveting ring is located in the mounting hole, thereby shortening the height of the terminal, saving space in the vertical direction, and improving the space utilization rate in the height direction of the battery. Attached Figure Description

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

[0010] Figure 1 This is a perspective view of a cover plate according to an embodiment of the present utility model;

[0011] Figure 2 for Figure 1 The top view of the cover plate shown;

[0012] Figure 3 for Figure 2 The cover plate shown is a sectional view along line AA.

[0013] Figure 4 for Figure 2 The cover plate shown is a sectional view along the BB direction;

[0014] Figure 5 for Figure 4 The diagram shows the structure of the cover plate body;

[0015] Figure 6 for Figure 4 The diagram shows the structure of the pole body.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Cover plate body; 101. Mounting hole; 1011. Upper hole section; 1012. Middle hole section; 1013. Lower hole section; 1014. Lower step surface;

[0018] 2. Pole post; 201. Pole post body; 2011. Riveting groove; 2012. Limiting part; 202. Riveting pressure ring; 2021. Limiting protrusion; 2022. Riveting protrusion;

[0019] 3. Lower insulation component;

[0020] 4. Install insulation components;

[0021] 5. Sealing ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0024] According to an embodiment of the present invention, a cover plate is provided, comprising: a cover plate body 1, an electrode post 2, and a lower insulating member 3. The cover plate body 1 has a mounting hole 101; the electrode post 2 includes an electrode post body 201 and a riveting ring 202. The electrode post body 201 is at least partially disposed in the mounting hole 101. The electrode post body 201 has a limiting portion 2012, which is disposed on the upper surface of the cover plate body 1. The portion of the electrode post body 201 near the lower surface of the cover plate body 1 is connected to the riveting ring 202; the lower insulating member 3 is disposed between the electrode post 2 and the cover plate body 1. Along the thickness direction of the cover plate, the bottom surface of the riveting ring 202 does not protrude from the bottom surface of the insulating member.

[0025] Using the cover plate of this embodiment, the riveting ring 202 is fixed to the lower end of the electrode body 201. The bottom surface of the riveting ring 202 does not protrude from the bottom surface of the lower insulating member 3, avoiding the risk of insulation failure caused by the cell overlapping with the cover plate. At the same time, it provides more space to accommodate the electrode tab, which is conducive to the electrode tab being bundled and avoids the electrode tab tearing. Most or all of the riveting ring 202 is located in the mounting hole 101, thereby shortening the height of the electrode 2, saving space in the vertical direction, and improving the space utilization rate in the height direction of the battery.

[0026] In one embodiment, along the thickness direction of the cover plate, the bottom surface of the riveting ring 202 is higher than the bottom surface of the insulating component, which further avoids the risk of insulation failure caused by the overlap of the cell and the cover plate, and also further facilitates the clamping of the electrode tabs and avoids the electrode tabs tearing; the height of the electrode post 2 is shortened, saving space in the vertical direction and improving the space utilization rate in the height direction of the battery.

[0027] In one embodiment, the distance L1 between the bottom surface of the riveting ring 202 and the bottom surface of the insulating component is 0.01mm-0.5mm. If L1 is too large, the connection area between the insulating component and the riveting ring 202 is small, the connection strength is weak, which affects the connection between the riveting ring 202 and the cover plate, easily leading to connection failure. Furthermore, a longer electrode length is required when welding the tab to the electrode post 2, which increases the resistance and the risk of accidental short circuit. If L1 is too small, the risk of insulation failure is high, the improvement effect of space utilization is poor, and it is also not conducive to the tab convergence.

[0028] Therefore, within the range of 0.01mm-0.5mm, L1 ensures the connection strength between the insulating component and the riveting ring 202, achieving an effective connection between the riveting ring 202 and the cover plate; it controls the length of the tab, thereby controlling the resistance and reducing the risk of accidental short circuits; it effectively avoids insulation failure, improves space utilization, and facilitates tab convergence.

[0029] Preferably, L1 is 0.01mm, 0.02mm, 0.06mm, 0.08mm, 0.1mm, 0.16mm, 0.2mm, 0.22mm, 0.3mm, 0.34mm, 0.4mm, or 0.5mm.

[0030] It is understood that in another embodiment, the bottom surface of the riveting ring 202 is flush with the bottom surface of the insulating component, the connection area between the insulating component and the riveting ring 202 is large, the connection strength is large, and the effective connection between the riveting ring 202 and the cover plate is achieved, effectively avoiding connection failure.

[0031] In one embodiment, the bottom surface of the pole body 201 does not protrude beyond the bottom surface of the riveting ring 202, preventing insulation failure caused by the overlap between the pole tab and the cover plate; this provides a larger accommodating space for the pole tab, making installation easier and reducing the risk of damage during assembly. The pole body 201 occupies little vertical space, improving space utilization. The bottom surface of the pole body 201 can be flush with or higher than the bottom surface of the riveting ring 202.

[0032] Furthermore, when the bottom surface of the pole body 201 is higher than the bottom surface of the riveting ring 202, the distance L2 between the bottom surface of the pole body 201 and the bottom surface of the riveting ring 202 is 0.01mm-0.6mm. If L2 is too small, the tab and the cover plate are prone to overlap, causing a short circuit. The small space for the tab makes it difficult to assemble. If L2 is too large, the riveting area between the pole 2 and the riveting ring 202 is small, and the riveting strength is low, which affects the connection between the pole 2 and the cover plate and is prone to connection failure. In addition, a longer tab length is required when welding the tab to the pole 2, which increases the resistance and the risk of accidental short circuit.

[0033] Therefore, within the range of 0.01mm-0.6mm, L2 avoids short circuits caused by overlap between the tab and the cover plate, ensuring that the tab has a suitable size for assembly, which facilitates the assembly of the tab and reduces assembly difficulty; it also ensures that the riveting area between the pole 2 and the riveting ring 202 is of a suitable size, ensuring riveting strength and achieving effective connection between the pole 2 and the cover plate; controlling the length of the tab, thereby controlling the resistance, also reduces the risk of accidental short circuits.

[0034] Preferably, L2 is 0.01mm, 0.02mm, 0.06mm, 0.08mm, 0.1mm, 0.16mm, 0.2mm, 0.22mm, 0.3mm, 0.34mm, 0.4mm, 0.44mm, 0.5mm, or 0.6mm.

[0035] In one embodiment, such as Figure 3 and Figure 4 As shown, the inner peripheral wall of the riveting pressure ring 202 has a riveting protrusion 2022, and the outer peripheral wall of the lower end of the pole body 201 has a riveting groove 2011. The riveting protrusion 2022 is riveted into the riveting groove 2011. The ratio of the thickness T1 of the riveting protrusion 2022 to the width W1 of the riveting protrusion 2022 along the radial direction of the pole body 201 is 0.3-4. The thickness T1 of the riveting protrusion 2022 is also... Figure 3 The vertical dimension of the riveting protrusion 2022, and the width W1 of the riveting protrusion 2022, are also... Figure 3 The lateral dimension of the riveting protrusion 2022.

[0036] Furthermore, if the ratio of the thickness T1 of the riveting protrusion 2022 to the width W1 of the riveting protrusion 2022 along the radial direction of the pole body 201 is small, it indicates that the thickness of the riveting protrusion 2022 is thin and the width of the riveting protrusion 2022 is wide, making it difficult to rivet the pressure ring 202 and increasing the assembly difficulty; if the ratio of the thickness T1 of the riveting protrusion 2022 to the width W1 of the riveting protrusion 2022 along the radial direction of the pole body 201 is large, it indicates that the thickness of the riveting protrusion 2022 is thick and the width of the riveting protrusion 2022 is narrow, resulting in lower riveting strength after riveting, which may lead to stress concentration around the riveting point and increase the risk of breakage.

[0037] Therefore, the ratio of the thickness T1 of the riveting protrusion 2022 to the width W1 of the riveting protrusion 2022 along the radial direction of the pole body 201 is set in the range of 0.3-4. This not only facilitates riveting and manufacturing, but also ensures the riveting strength of the pole body 201 and the riveting pressure ring 202 after riveting, thereby improving the reliability of the pole 2.

[0038] Specifically, the thickness T1 of the riveting protrusion 2022 is 0.4mm-2mm, and the width W1 of the riveting protrusion 2022 is 0.1mm-1.5mm.

[0039] Preferably, the thickness T1 of the riveting protrusion 2022 is 0.1mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.6mm, or 1.8mm, and the width W1 of the riveting protrusion 2022 is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 1mm, 1.2mm, 1.4mm, or 1.5mm.

[0040] In one embodiment, such as Figure 3 , Figure 4 and Figure 6 As shown, the lower part of the outer peripheral wall of the riveting ring 202 has an outwardly protruding limiting protrusion 2021. The outer diameter D1 of the limiting portion 2012 along the radial direction of the pole body 201 is larger than the outer diameter D2 of the limiting protrusion 2021. The setting of the limiting portion 2012 can increase the welding area between the pole body 201 and the busbar, thereby reducing the contact resistance and improving the current transmission efficiency.

[0041] Furthermore, an upper insulating member 4 and a sealing ring 5 are provided between the electrode post 2 and the cover plate body 1. The upper insulating member 4 is pressed between the cover plate body 1 and the electrode post 2 by the limiting part 2012, ensuring good electrical isolation between the electrode post 2 and the cover plate body 1 and preventing short circuits caused by poor contact or accidental contact. The limiting part 2012 tightly presses the sealing ring 5 to form a reliable sealing barrier to prevent electrolyte leakage from the connection between the electrode post 2 and the cover plate.

[0042] Specifically, the outer diameter D1 of the limiting part 2012 along the radial direction of the pole body 201 is 40mm-150mm, and the outer diameter D2 of the limiting protrusion 2021 is 30mm-150mm. The outer diameter D1 of the limiting part 2012 is also... Figure 6 The lateral dimension of the limiting part 2012, and the outer diameter D2 of the limiting protrusion 2021 are also... Figure 3 The lateral dimension of the limiting protrusion 2021 in the middle.

[0043] Preferably, D1 is 30mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, or 150mm.

[0044] In one embodiment, along the axial direction of the mounting hole 101, the ratio of the total thickness T2 of the riveting ring 202 to the total thickness T3 of the pole post 2 is 0.25-1.7. The total thickness T2 of the riveting ring 202 is also the vertical dimension of the riveting ring 202 in the figure, and the total thickness of the pole post 2 is also the vertical dimension of the pole post 2 in the figure.

[0045] Furthermore, if the ratio of the total thickness T2 of the riveting ring 202 to the total thickness T3 of the pole post 2 is small, it indicates that the total thickness of the riveting ring 202 is thin. A thin riveting ring 202 provides less clamping force and contact area, which may lead to insufficient strength at the connection point. Especially under high load conditions, the thin riveting ring 202 is more easily pulled apart under tensile force, reducing the reliability of the connection. If the ratio of the total thickness T2 of the riveting ring 202 to the total thickness T3 of the pole post 2 is large, it indicates that the total thickness of the riveting ring 202 is thick. A thicker riveting ring 202 may require more complex processing techniques and higher pressure, increasing production difficulty and cost. An excessively thick riveting ring 202 may cause stress concentration at the connection between the pole post 2 and the riveting ring 202, thereby reducing the overall structural safety.

[0046] Therefore, the ratio of the total thickness T2 of the riveting pressure ring 202 to the total thickness T3 of the pole post 2 is set in the range of 0.25-1.7. On the one hand, this ensures the structural strength of the riveting point and improves the reliability of the connection; on the other hand, it controls the processing difficulty and cost and improves the safety of the overall structure.

[0047] Specifically, the total thickness T2 of the riveting pressure ring 202 is 1mm-3.5mm, and the total thickness T3 of the pole post 2 is 2mm-5.0mm.

[0048] Preferably, the total thickness T2 of the riveting pressure ring 202 is 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, or 3.5mm, and the total thickness T3 of the pole post 2 is 2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, or 5.0mm.

[0049] In one embodiment, such as Figures 3 to 5 As shown, the lower part of the outer peripheral wall of the riveting ring 202 has an outwardly protruding limiting protrusion 2021. The mounting hole 101 is a stepped hole, which includes an upper hole section 1011, a middle hole section 1012, and a lower hole section 1013 arranged sequentially. The diameter of the upper hole section 1011 is larger than that of the middle hole section 1012, and the diameter of the lower hole section 1013 is larger than that of the middle hole section 1012. The ratio of the outer diameter D2 of the limiting protrusion 2021 to the diameter D3 of the middle hole section 1012 is 0.25-7. The outer diameter D2 of the limiting protrusion 2021 is also... Figure 3 The transverse dimension of the limiting protrusion 2021, and the diameter of the hole in the middle section 1012 are also... Figure 5 The transverse dimension of the central hole section 1012.

[0050] Furthermore, if the ratio of the outer diameter D2 of the limiting protrusion 2021 to the diameter D3 of the middle hole section 1012 is too small, it indicates that the outer diameter of the limiting protrusion 2021 is small, resulting in a small distance between the outer peripheral wall of the limiting protrusion 2021 and the hole wall of the middle hole section 1012. Consequently, the clamping ability of the limiting protrusion 2021 on the lower insulating component 3 is limited, and the clamping effect is poor. If the ratio of the outer diameter D2 of the limiting protrusion 2021 to the diameter D3 of the middle hole section 1012 is too large, it indicates that the outer diameter of the limiting protrusion 2021 is large, increasing the material usage and resulting in higher costs.

[0051] Therefore, the ratio of the outer diameter D2 of the limiting protrusion 2021 to the diameter D3 of the middle hole section 1012 is set in the range of 0.25-7, which not only achieves effective pressing of the lower insulating part 3, but also controls the amount of material used and the cost.

[0052] Specifically, the outer diameter D2 of the limiting protrusion 2021 is 30mm-150mm, and the diameter D3 of the middle hole section 1012 is 20mm-150mm.

[0053] Preferably, the outer diameter D2 of the limiting protrusion 2021 is 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, or 150mm, and the hole diameter D3 of the middle hole section 1012 is 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, or 150mm.

[0054] In one embodiment, along the axial direction of the mounting hole 101, the ratio of the thickness T4 of the limiting protrusion 2021 to the depth H of the lower hole section 1013 is 0.25-0.45. The thickness T4 of the limiting protrusion 2021 is also... Figure 3 The vertical dimension of the limiting protrusion 2021 in the middle, and the depth H of the lower hole section 1013 are also... Figure 5 The vertical dimension of the lower hole section 1013.

[0055] Furthermore, if the ratio of the thickness T4 of the limiting protrusion 2021 to the depth H of the lower hole section 1013 is small, it indicates that the thickness of the limiting protrusion 2021 is relatively thin, and the clamping ability of the limiting protrusion 2021 on the lower insulating member 3 is limited, making the pole post 2 not firmly and reliably fixed to the cover plate, thus affecting the overall stability of the cover plate; if the ratio of the thickness T4 of the limiting protrusion 2021 to the depth H of the lower hole section 1013 is large, it indicates that the thickness of the limiting protrusion 2021 is large, the height of the pole post 2 is high, and the vertical space occupied is large.

[0056] Therefore, the ratio of the thickness T4 of the limiting protrusion 2021 to the depth H of the lower hole section 1013 is set in the range of 0.25-0.45, which can effectively press the lower insulating member 3 with the limiting protrusion 2021 while controlling the height of the pole post 2, thereby improving the space utilization rate in the height direction of the battery.

[0057] Specifically, the thickness T4 of the limiting protrusion 2021 is 0.4mm-2mm, and the depth H of the lower hole section 1013 is 0.4mm-2mm.

[0058] Preferably, the thickness T4 of the limiting protrusion 2021 is 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, or 1.8mm, and the depth H of the lower hole section 1013 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, or 2mm.

[0059] In one embodiment, such as Figure 4 and Figure 5 As shown, the stepped hole also includes a lower step surface 1014 connecting the connecting hole section and the lower hole section 1013. The distance L3 between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is 0.1mm-1mm. The distance L3 between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is also... Figure 4 The vertical dimension between the lower step surface 1014 and the top surface of the limiting protrusion 2021.

[0060] Furthermore, if the distance L3 between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is small, it indicates that the thickness of the portion of the lower insulating member 3 located between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is relatively thin. The pole post 2 and the cover plate body 1 are prone to short circuits due to targeting or impact, posing a significant safety risk. If the distance L3 between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is large, it indicates that the thickness of the portion of the lower insulating member 3 located between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is relatively thick. This increases the height of the pole post 2, occupies a large amount of vertical space, and thus affects the utilization rate of vertical space.

[0061] Therefore, the distance L3 between the lower step surface 1014 and the top surface of the limiting protrusion 2021 is set in the range of 0.1mm-1mm. This not only ensures the isolation of the electrode post 2 and the cover plate body 1 and prevents short circuits between the electrode post 2 and the cover plate body 1, but also controls the thickness of the electrode post 2, occupies less space, and improves the space utilization of the battery pack.

[0062] Preferably, L3 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1mm.

[0063] It should be noted that the units for T1, W1, D1, D2, T2, T3, D3, T4, H, L1, L2, and L3 are all mm.

[0064] According to an embodiment of the present invention, another aspect provides a battery, comprising: a housing, the aforementioned cover plate, and a battery cell, wherein the housing has a first wall; the cover plate is disposed on the first wall; and the battery cell is disposed inside the housing.

[0065] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A cover plate, characterized in that, include: The cover body (1) has mounting holes (101); The pole (2) includes a pole body (201) and a riveting ring (202). The pole body (201) is at least partially disposed in the mounting hole (101). The pole body (201) has a limiting part (2012) disposed on the upper surface of the cover plate body (1). The portion of the pole body (201) near the lower surface of the cover plate body (1) is connected to the riveting ring (202). The lower insulating member (3) is disposed between the pole post (2) and the cover plate body (1). Along the thickness direction of the cover plate, the bottom surface of the riveting pressure ring (202) does not protrude from the bottom surface of the insulating member.

2. The cover plate according to claim 1, characterized in that, Along the thickness direction of the cover plate, the bottom surface of the riveting ring (202) is higher than the bottom surface of the insulating component.

3. The cover plate according to claim 2, characterized in that, The distance L1 between the bottom surface of the riveting pressure ring (202) and the bottom surface of the insulating component is 0.01mm-0.5mm.

4. The cover plate according to claim 1, characterized in that, The bottom surface of the riveting pressure ring (202) is flush with the bottom surface of the insulating component.

5. The cover plate according to claim 1, characterized in that, The bottom surface of the pole body (201) does not protrude from the bottom surface of the riveting pressure ring (202).

6. The cover plate according to claim 5, characterized in that, The distance L2 between the bottom surface of the pole body (201) and the bottom surface of the riveting pressure ring (202) is 0.01mm-0.6mm.

7. The cover plate according to claim 1, characterized in that, The inner peripheral wall of the riveting pressure ring (202) has a riveting protrusion (2022), and the outer peripheral wall of the lower end of the pole body (201) has a riveting groove (2011). The riveting protrusion (2022) is riveted in the riveting groove (2011). The ratio of the thickness T1 of the riveting protrusion (2022) to the width W1 of the riveting protrusion (2022) along the radial direction of the pole body (201) is 0.3-4.

8. The cover plate according to claim 7, characterized in that, The thickness T1 of the riveting protrusion (2022) is 0.4mm-2mm, and the width W1 of the riveting protrusion (2022) is 0.1mm-1.5mm.

9. The cover plate according to claim 1, characterized in that, The lower part of the outer peripheral wall of the riveting pressure ring (202) has an outwardly protruding limiting protrusion (2021), and the outer diameter D1 of the limiting part (2012) along the radial direction of the pole body (201) is greater than the outer diameter D2 of the limiting protrusion (2021).

10. The cover plate according to claim 1, characterized in that, Along the axial direction of the mounting hole (101), the ratio of the total thickness T2 of the riveting pressure ring (202) to the total thickness T3 of the pole post (2) is 0.25-1.

7.

11. The cover plate according to claim 10, characterized in that, The total thickness T2 of the riveted pressure ring (202) is 1mm-3.5mm, and the total thickness T3 of the pole post (2) is 2mm-5.0mm.

12. The cover plate according to claim 1, characterized in that, The lower part of the outer peripheral wall of the riveting ring (202) has an outwardly protruding limiting protrusion (2021). The mounting hole (101) is a stepped hole, which includes an upper hole section (1011), a middle hole section (1012), and a lower hole section (1013) arranged sequentially. The diameter of the upper hole section (1011) is larger than that of the middle hole section (1012), and the diameter of the lower hole section (1013) is larger than that of the middle hole section (1012). The ratio of the outer diameter D2 of the limiting protrusion (2021) to the diameter D3 of the middle hole section (1012) is 0.25-7.

13. The cover plate according to claim 12, characterized in that, Along the axial direction of the mounting hole (101), the ratio of the thickness T4 of the limiting protrusion (2021) to the depth H of the lower hole section (1013) is 0.25-0.

45.

14. The cover plate according to claim 12, characterized in that, The stepped hole also includes a lower step surface (1014) connecting the hole segment and the lower hole segment (1013), and the distance L3 between the lower step surface (1014) and the top surface of the limiting protrusion (2021) is 0.1mm-1mm.

15. A battery, characterized in that, include: The shell has a first wall; The cover plate according to any one of claims 1 to 14 is disposed on the first wall; The battery cell is disposed within the housing.

Images