Cover plate structure, cover plate assembly, battery and battery pack

Abstract

The utility model relates to battery technical field discloses the cover plate structure, cover plate subassembly, battery and battery group, include: main part has along the first surface and second surface of opposite arrangement of main part's thickness direction, the main part is along its thickness direction and is provided with the pole hole through, the flanging structure is connected with first surface and is along the main part's thickness direction and is set out from first surface, the flanging structure surrounds the pole hole setting, the flanging structure towards the inner peripheral surface of pole hole is seted up and has avoided the groove, the cantilever structure is connected with the main part setting, the cantilever structure is in the plane perpendicular to the main part's thickness direction and extends out the hole wall setting of pole hole. The utility model discloses through setting avoided the groove can avoid the extrusion of insulating part when flanging structure is turned over too big, thereby avoids the insulating part and presses the collapse, guarantees the insulating effect of cover plate subassembly, avoids the occurrence of short circuit risk.

Description

Technical Field

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

[0002] Terminals are components in a battery used to input and output current. They can be mounted on a cover plate and secured to the upper surface of the terminal by a flanged structure on the cover plate. However, when the flanged structure is folded and pressed onto the upper surface of the terminal, there is a risk of crushing the insulating material surrounding the terminal, leading to insulation failure of the cover plate assembly and a short circuit risk. Utility Model Content

[0003] In view of this, the present invention provides a cover plate structure, a cover plate assembly, a battery, and a battery pack to solve the problem in the prior art that when the flanged structure is folded and pressed onto the upper surface of the electrode post, there is a risk of crushing the insulating component covering the electrode post, which leads to insulation failure of the cover plate assembly and a short circuit risk.

[0004] In a first aspect, the present invention provides a cover plate structure, comprising: a main body having a first surface and a second surface disposed opposite to each other along the thickness direction of the main body, wherein a pole post hole is provided through the main body along its thickness direction; a flange structure connected to the first surface and protruding from the first surface along the thickness direction of the main body, the flange structure being disposed around the pole post hole, and an avoidance groove being formed on the inner circumferential surface of the flange structure facing the pole post hole; and a cantilever structure connected to the main body, wherein the cantilever structure extends out of the hole wall of the pole post hole on a plane perpendicular to the thickness direction of the main body.

[0005] Beneficial effects: By opening a clearance groove on the inner circumference of the flange structure, when the pole structure is assembled and riveted, the flange structure is folded at the clearance groove. By setting the clearance groove, excessive pressure on the insulating parts can be avoided when the flange structure is folded, thereby preventing the insulating parts from being crushed, ensuring the insulation effect of the cover plate assembly, and avoiding the risk of short circuit.

[0006] Secondly, this utility model also provides a cover plate assembly, including: the cover plate structure described above; a pole structure disposed on the cantilever structure, the flange structure being disposed around the pole structure, the flange structure being folded at the clearance groove and pressed onto the side of the pole structure away from the main body.

[0007] Thirdly, this utility model also provides a battery, comprising: a housing having an opening at at least one end; the aforementioned cover assembly connected to the housing and sealing the opening; and a battery cell disposed within the housing and electrically connected to the electrode structure.

[0008] Fourthly, this utility model also provides a battery pack, comprising a plurality of the aforementioned batteries. 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 schematic diagram of a cover plate structure according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of the clearance groove in an embodiment of the present invention when the cross-sectional shape is trapezoidal; Figure 3 This is a structural schematic diagram of the cross-sectional shape of the clearance groove in an embodiment of the present invention being square; Figure 4 This is a structural schematic diagram of the cross-sectional shape of the clearance groove in an embodiment of the present invention, which is triangular. Figure 5 This is a schematic diagram of the structure of the clearance groove in an embodiment of the present invention when the cross-sectional shape is U-shaped; Figure 6 for Figure 1 The diagram shows the structure of the cover plate after the pole structure is assembled. Figure 7 This is a schematic diagram of the flange structure, insulating component, and pole body of this utility model as an orthographic projection on a projection plane perpendicular to the thickness direction. Figure 8 This is a schematic diagram of the structure of a cover plate assembly according to an embodiment of the present utility model; Figure 9 for Figure 8 Top view of the cover plate assembly shown; Figure 10 for Figure 9 A cross-sectional view along the AA direction; Figure 11 This is a schematic diagram of the cover plate assembly of this utility model when there is a gap between the bend of the flange structure and the insulating component.

[0011] Explanation of reference numerals in the attached figures: 1. Cover plate structure; 11. Main body; 111. First surface; 112. Second surface; 113. Pole post hole; 12. Flanged structure; 121. Clearance groove; 122. Connecting section; 123. Riveting section; 124. Bending point; 13. Cantilever structure; 2. Pole post structure; 21. Pole post body; 22. Insulating component; 3. Predetermined pressing position. Detailed Implementation

[0012] 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.

[0013] The following is combined Figures 1 to 11 The following describes embodiments of the present invention.

[0014] According to an embodiment of the present invention, in one aspect, a cover plate structure 1 is provided, such as... Figure 1 As shown, it includes: a main body 11 having a first surface 111 and a second surface 112 disposed opposite to each other along the thickness direction of the main body 11, and a pole post hole 113 being disposed through the main body 11 along its thickness direction; a flange structure 12 connected to the first surface 111 and protruding from the first surface 111 along the thickness direction of the main body 11, the flange structure 12 being disposed around the pole post hole 113, and a relief groove 121 being opened on the inner peripheral surface of the flange structure 12 facing the pole post hole 113; and a cantilever structure 13 connected to the main body 11, the cantilever structure 13 extending out of the hole wall of the pole post hole 113 on a plane perpendicular to the thickness direction of the main body 11.

[0015] In the cover plate structure 1 of this embodiment, an avoidance groove 121 is opened on the inner circumferential surface of the flange structure 12. When the pole post structure 2 is assembled and riveted, the flange structure 12 is folded at the avoidance groove 121. By setting the avoidance groove 121, the excessive squeezing force on the insulating component 22 when the flange structure 12 is folded can be avoided, thereby preventing the insulating component 22 from being crushed, ensuring the insulation effect of the cover plate assembly, and avoiding the risk of short circuit.

[0016] It is worth noting that the insulating component 22 wraps around the outer periphery of the pole body 21, serving to provide insulation between the main body 11 and the pole body 21, between the cantilever structure 13 and the pole body 21, and between the flange structure 12 and the pole body 21. During the assembly of the cover plate assembly, the upper part of the flange structure 12 needs to be folded over so that this part is riveted to the pole structure 2 (specifically, riveted to the insulating component 22), thereby achieving riveting fixation of the flange structure 12 to the pole structure 2. That is, in the assembled cover plate assembly, the flange structure 12 includes a connecting section 122 and a riveting section 123. The connecting section 122 connects to the main body 11, and the riveting section 123 is pressed onto the pole structure 2, with the riveting section 123 and the connecting section 122 arranged at a certain angle. Specifically, the flange structure 12 has a predetermined pressing position 3. The flange structure 12 is folded at the predetermined pressing position 3. The part of the flange structure 12 below the predetermined pressing position 3 forms a connecting section 122, and the part of the flange structure 12 above the predetermined pressing position 3 forms a riveting section 123.

[0017] It should be noted that in related technologies, the predetermined pressing position 3 of the flange structure 12 is usually flush with the upper surface of the insulating member 22. However, researchers have found that since the insulating member 22 is usually made of plastic, when folded at the pressing height in related technologies, excessive compressive force is applied to the insulating member 22, making it prone to crushing and causing a short circuit risk. Therefore, in this embodiment, a clearance groove 121 is provided on the inner circumference of the flange structure 12 at the height corresponding to the predetermined pressing position 3, so that there is a certain gap between the flange structure 12 and the insulating member 22 when folding, reducing the compression on the insulating member 22, thereby avoiding the problem of the insulating member 22 being crushed and ensuring the insulation effect of the cover assembly.

[0018] It is worth noting that in this embodiment, the clearance groove 121 is set at the height of the predetermined pressing position 3 on the inner circumference of the flange structure 12.

[0019] Furthermore, in one embodiment, such as Figure 1 As shown, along the thickness direction of the main body 11, the opening height of the clearance groove 121 on the inner circumferential surface of the pole hole 113 is h1, and the height of the flange structure 12 is h2. The units of h1 and h2 are both mm, and they satisfy 0.015≤h1 / h2≤0.35. This setting avoids crushing of the insulating component 22 while ensuring the structural strength of the flange structure 12.

[0020] It is worth noting that if the value of h1 / h2 is too small, the opening range of the clearance groove 121 along the thickness direction of the main body 11 will be too small, resulting in insufficient clearance effect on the insulating component 22 during the riveting of the flange structure 12, and there is still a risk of crushing the insulating component 22. If the value of h1 / h2 is too large, the opening range of the clearance groove 121 along the thickness direction of the main body 11 will be too large, resulting in excessive weakening of the structural strength of the flange structure 12, causing problems such as breakage of the flange structure 12, thereby affecting the stability of the pole structure 2.

[0021] Optionally, h1 / h2 can be any value from 0.015, 0.02, 0.05, 0.1, 0.12, 0.15, 0.18, 0.2, 0.22, 0.25, 0.28, 0.3, 0.32, 0.35, or a value between any two values.

[0022] Specifically, in one embodiment, such as Figure 1 As shown, along the thickness direction of the main body 11, the opening height h1 of the clearance groove 121 on the inner circumferential surface of the pole hole 113 satisfies 0.1≤h1≤1, where h1 is in mm. This setting ensures the structural strength of the flange structure 12 while avoiding crushing of the insulating component 22.

[0023] It is worth noting that if the value of h1 is too small, the opening range of the clearance groove 121 along the thickness direction of the main body 11 will be too small, resulting in insufficient clearance effect on the insulating component 22 during the riveting of the flange structure 12, and there is still a risk of crushing the insulating component 22. If the value of h1 is too large, the opening range of the clearance groove 121 along the thickness direction of the main body 11 will be too large, resulting in excessive weakening of the structural strength of the flange structure 12, causing problems such as breakage of the flange structure 12, thereby affecting the stability of the pole structure 2.

[0024] Optionally, h1 can take any value from 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, or a value between any two values.

[0025] Specifically, in one embodiment, such as Figure 1 As shown, along the thickness direction of the main body 11, the height h2 of the flange structure 12 satisfies 1.2≤h2≤3.5, where h2 is in mm. This setting ensures the riveting effect on the pole structure 2 while avoiding excessive coverage of the pole structure 2, which could affect the electrical connection between the pole structure 2 and the busbar.

[0026] It is worth noting that if the value of h2 is too small, the height of the flange structure 12 pressed onto the pole post structure 2 may be too small, which will affect the pressing effect of the flange structure 12 on the pole post structure 2, and thus affect the stability of the pole post structure 2. If the value of h2 is too large, the coverage area of ​​the flange structure 12 pressed onto the pole post structure 2 may be too large, resulting in too small a remaining area of ​​the pole post structure 2 that can be used to connect with the busbar, which will affect the flow capacity of the pole post structure 2 and the busbar.

[0027] Optionally, h2 can be any value from 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.5 or a value between any two values.

[0028] Furthermore, in one embodiment, such as Figure 1 As shown, the recess depth of the clearance groove 121 from the inner circumference of the flange structure 12 to the outer circumference is t, and the thickness of the flange structure 12 is d. The units of t and d are both mm, and they satisfy 0.05≤t / d≤0.9. This design ensures that the insulating component 22 will not be crushed while maintaining the structural strength of the flange structure 12.

[0029] It is worth noting that if the value of t / d is too small, the recess depth of the clearance groove 121 will be too small, insufficient to allow the insulation component 22 to pass, posing a risk of excessive compressive force on the insulation component 22 and causing it to crush. If the value of t / d is too large, the recess depth of the clearance groove 121 will be too large, resulting in excessive weakening of the structural strength of the flange structure 12, which may easily lead to the risk of the flange structure 12 breaking, thereby affecting the stability of the pole post structure 2.

[0030] Optionally, t / d can be any value from 0.05, 0.08, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.7, 0.8, 0.9, or a value between any two values.

[0031] Preferably, the recess depth t of the relief groove 121 from the inner circumference of the flange structure 12 to the outer circumference and the thickness d of the flange structure 12 satisfy 0.08≤t / d≤0.5.

[0032] Specifically, in one embodiment, such as Figure 1 As shown, the recess depth t of the clearance groove 121 from the inner circumference of the flange structure 12 to the outer circumference satisfies 0.1≤t≤0.9, where t is in mm. This design ensures that the insulating component 22 will not be crushed while maintaining the structural strength of the flange structure 12.

[0033] It is worth noting that if the value of t is too small, the recess depth of the clearance groove 121 will be too small, insufficient to avoid the insulating component 22, posing a risk of excessive compressive force on the insulating component 22 and causing it to crush. If the value of t is too large, the recess depth of the clearance groove 121 will be too large, resulting in excessive weakening of the structural strength of the flange structure 12, which may easily lead to the risk of the flange structure 12 breaking, thereby affecting the stability of the pole structure 2.

[0034] Optionally, t can take any value from 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or a value between any two values.

[0035] Specifically, in one embodiment, such as Figure 1 As shown, the thickness d of the flange structure 12 satisfies 0.6≤d≤1.5, where d is in mm. This design ensures the structural strength of the flange structure 12 while facilitating its folding.

[0036] It is worth noting that if the value of d is too large, the flange structure 12 will be too thick, making it difficult to fold the flange structure 12 when riveting the pole post structure 2. If the value of d is too small, the structural strength of the flange structure 12 will be low, affecting the riveting effect of the flange structure 12 on the pole post structure 2 and impacting the stability of the pole post structure 2.

[0037] Optionally, d can take any value from 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 or a value between any two values.

[0038] Furthermore, in one embodiment, such as Figure 1 As shown, along the thickness direction of the main body 11, the distance between the clearance groove 121 and the side of the cantilever structure 13 near the first surface 111 is h3, and the distance between the clearance groove 121 and the end of the flange structure 12 away from the first surface 111 is h4. The units of h3 and h4 are both mm, and they satisfy 1≤h3 / h4≤8. This setting can ensure the riveting effect on the pole post structure 2, while avoiding excessive coverage of the pole post structure 2, which would affect the subsequent connection area with the busbar.

[0039] It is worth noting that if the value of h3 / h4 is too small, the distance between the clearance groove 121 and the upper end face of the flange structure 12 will be too large, that is, the height of the pressing section 123 will be too large. After the flange structure 12 is folded over, the coverage area of ​​the pole post structure 2 will be too large, resulting in too small an area of ​​the pole post structure 2 for connecting with the busbar, affecting the flow capacity. If the value of h3 / h4 is too large, the distance between the clearance groove 121 and the upper end face of the flange structure 12 will be too small, that is, the height of the pressing section 123 will be too small. After the flange structure 12 is folded over, the area pressed onto the pole post structure 2 will be too small, affecting the pressing effect on the pole post structure 2, and the stability of the pole post structure 2 will be low.

[0040] Optionally, h3 / h4 can be any value from 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, or a value between any two values.

[0041] Specifically, in one embodiment, such as Figure 1 As shown, along the thickness direction of the main body 11, the distance h3 between the clearance groove 121 and the side of the cantilever structure 13 near the first surface 111 satisfies 0.8≤h3≤3.5, where h3 is in mm. This setting ensures the riveting effect on the pole post structure 2 while avoiding excessive coverage of the pole post structure 2, which would affect the subsequent connection area with the busbar.

[0042] It is worth noting that if the value of h3 is too small, the distance between the clearance groove 121 and the upper end face of the flange structure 12 will be too large, that is, the height of the pressing section 123 will be too large. After the flange structure 12 is folded over, the coverage area of ​​the pole post structure 2 will be too large, resulting in too small an area of ​​the pole post structure 2 for connecting with the busbar, affecting the flow capacity. If the value of h3 is too large, the distance between the clearance groove 121 and the upper end face of the flange structure 12 will be too small, that is, the height of the pressing section 123 will be too small. After the flange structure 12 is folded over, the area pressed on the pole post structure 2 will be too small, affecting the pressing effect on the pole post structure 2, and the stability of the pole post structure 2 will be low.

[0043] Optionally, h3 can be any value from 0.8, 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.5 or a value between any two values.

[0044] Specifically, in one embodiment, such as Figure 1As shown, along the thickness direction of the main body 11, the distance h4 between the clearance groove 121 and the end of the flange structure 12 away from the first surface 111 satisfies 0.5≤h4≤1.5, where h4 is in mm. This setting ensures the riveting effect on the pole post structure 2 while avoiding excessive coverage of the pole post structure 2, which would affect the subsequent connection area with the busbar.

[0045] It is worth noting that if the value of h4 is too large, the distance between the clearance groove 121 and the upper end face of the flange structure 12 will be too large, that is, the height of the pressing section 123 will be too large. This will result in the flange structure 12 covering too much of the pole post structure 2 after folding, leading to insufficient remaining area for connection with the busbar and affecting the flow capacity. Conversely, if the value of h4 is too small, the distance between the clearance groove 121 and the upper end face of the flange structure 12 will be too small, that is, the height of the pressing section 123 will be too small. This will result in insufficient area pressed onto the pole post structure 2 after folding, affecting the pressing effect on the pole post structure 2 and causing lower stability of the pole post structure 2.

[0046] Optionally, h3 / h4 can be any value from 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 or a value between any two values.

[0047] In one embodiment, such as Figure 7 As shown, on the projection plane perpendicular to the thickness direction of the main body 11, the orthographic projection of the flange structure 12 is racetrack-shaped. That is, the assembly method of the cover plate assembly in this embodiment is applied to the racetrack-shaped pole post.

[0048] In one embodiment, such as Figure 1 As shown, along the thickness direction of the main body 11, the thickness of the cantilever structure 13 is k, where k is in mm, and satisfies 0.6≤k≤1.8. This configuration ensures the structural strength of the cantilever structure 13 while facilitating the riveting of the flange structure 12 to the pole structure 2.

[0049] It is worth noting that if the value of k is too large, the thickness of the cantilever structure 13 will be too large, the installation height of the pole structure 2 after being installed on the cantilever structure 13 will be too large, and the height of the flange structure 12 used for pressing and riveting the pole structure 2 after folding will be too small, affecting the riveting effect of the flange structure 12 on the pole structure 2. If the value of k is too small, the thickness of the cantilever structure 13 will be too small, resulting in lower structural strength of the cantilever structure 13 and affecting the reliability of the cantilever structure 13 in supporting the pole structure 2.

[0050] Optionally, k can take any value from 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or a value between any two values.

[0051] In one embodiment, such as Figure 1 As shown, on a plane perpendicular to the thickness direction of the main body 11, the width of the cantilever structure 13 is L, where L is in mm, and satisfies 1.5≤L≤5. This configuration ensures the reliability of the cantilever structure 13 in supporting the pole structure 2 while facilitating the electrical connection between the battery cell and the pole structure 2.

[0052] It is worth noting that if the value of L is too large, the opening range of the racetrack-shaped hole in the middle of the cantilever structure 13 will be too small, making it difficult for the subsequent battery cell tabs to make electrical connections with the terminal structure 2 through the racetrack-shaped hole. If the value of L is too small, the contact area between the cantilever structure 13 and the terminal structure 2 will be too small, affecting the reliability of the cantilever structure 13 in supporting the terminal structure 2.

[0053] Optionally, L can be any value from 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, or a value between any two values.

[0054] It is worth noting that, in the cross-section along the thickness direction of the main body 11, the cross-sectional shape of the clearance groove 121 can be fan-shaped (e.g., ...). Figure 1 (as shown), or trapezoidal (as shown) Figure 2 (as shown), or square (as shown) Figure 3 (as shown), or a triangle (such as) Figure 4 (as shown), or U-shaped (as shown) Figure 5 (as shown in the image) etc.

[0055] According to an embodiment of the present invention, another aspect also provides a cover plate assembly, such as... Figure 6 and Figure 10 As shown, it includes: the cover plate structure 1 mentioned above; the pole structure 2, which is disposed on the cantilever structure 13; the flange structure 12 is disposed around the pole structure 2; the flange structure 12 is folded at the relief groove 121 and pressed on the side of the pole structure 2 away from the main body 11.

[0056] Furthermore, in one embodiment, such as Figure 6 and Figure 10 As shown, the electrode structure 2 includes an electrode body 21 and an insulating member 22. The insulating member 22 wraps around the outer periphery of the electrode body 21, and the flange structure 12 is pressed onto the side of the insulating member 22 away from the electrode body. It is worth noting that, as... Figure 6 and Figure 10 As shown, the flange structure 12 is pressed onto the upper surface of the insulating member 22.

[0057] In one embodiment, such as Figure 10As shown, the flange structure 12 includes a bend 124 corresponding to the location of the clearance groove 121 and flange bodies connecting the two sides of the bend 124.

[0058] It is worth noting that, such as Figure 11 As shown, a gap may be provided between the bend and the insulating component; or, as... Figure 6 As shown, the bend and the insulating part can also be fitted together.

[0059] Furthermore, the thickness of the flange structure 12 at the bend 124 is e, and the thickness of the flange body is f, where e and f are both in mm, satisfying 0.2≤e / f≤0.9. This design ensures the structural strength of the flange structure 12 while avoiding crushing of the insulating component 22.

[0060] It is worth noting that if the value of e / f is too large, the thickness of the flange structure 12 at the bending point 124 will be too thick, and there is still a risk that the insulation component 22 will be crushed due to excessive compressive force. If the value of e / f is too small, the thickness of the flange structure 12 at the bending point 124 will be too small, resulting in low structural strength of the flange structure 12 at the bending point 124, which may easily lead to problems such as breakage of the flange structure 12, thereby affecting the stability of the pole post structure 2.

[0061] Optionally, e / f can take any value from 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, or a value between any two values.

[0062] Specifically, in one embodiment, such as Figure 10 As shown, the thickness e of the flange structure 12 at the bend 124 satisfies 0.4≤e≤1.5, where e is in mm. This design ensures the structural strength of the flange structure 12 while avoiding crushing of the insulating component 22.

[0063] It is worth noting that if the value of e is too large, the thickness of the flange structure 12 at the bending point 124 will be too thick, which still poses a risk of excessive compressive force on the insulating component 22, causing it to collapse. If the value of e is too small, the thickness of the flange structure 12 at the bending point 124 will be too small, resulting in low structural strength at the bending point 124, which may easily lead to problems such as breakage of the flange structure 12, thereby affecting the stability of the pole post structure 2.

[0064] Optionally, e can take any value from 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 or a value between any two values.

[0065] Specifically, in one embodiment, such as Figure 10 As shown, the flanged body includes a connecting section 122 connected to the main body 11 and a pressing section 123 pressed onto the electrode post structure 2. The thickness of the connecting section 122 is f1, and the thickness of the pressing section 123 is f2. The units of f1 and f2 are both mm, and they satisfy 0.6≤f1≤2 and 0.6≤f2≤1.5. This design ensures the structural strength of the flanged structure 12 while avoiding the flanged structure 12 occupying too much space and affecting the space utilization of the battery.

[0066] It is worth noting that if the values ​​of f1 and f2 are too small, the structural strength of the flange structure 12 may be too low, affecting the riveting effect on the terminal structure 2 and thus affecting the stability of the terminal structure 2. If the values ​​of f1 and f2 are too large, the flange structure 12 will occupy too much space, which may affect the space utilization of the battery.

[0067] Optionally, f1 can take any value from 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.8, 2, or a value between any two values.

[0068] Optionally, f2 can take any value from 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 or a value between any two values.

[0069] It is understandable that f can be equal to f1 or f2.

[0070] In one embodiment, such as Figure 7 As shown, on the projection plane perpendicular to the thickness direction of the main body 11, the overlapping area of ​​the orthographic projection of the flange structure 12, the orthographic projection of the insulating component 22, and the orthographic projection of the pole body 21 is S, where the unit of S is mm. 2 The requirement is 30≤S≤200. This setting ensures the riveting effect on the pole structure 2 while avoiding excessive coverage of the pole structure 2, which would affect the subsequent connection area with the busbar.

[0071] It is worth noting that if the value of S is too small, the pressing area of ​​the flange structure 12 on the pole body 21 will be too small, which may affect the riveting effect of the pole structure 2 and thus affect the stability of the pole structure 2. If the value of S is too large, the coverage area of ​​the flange structure 12 and the insulating part 22 on the pole body 21 will be too large, resulting in too small an area of ​​the pole body 21 for connecting with the busbar, which will affect the current carrying capacity.

[0072] Optionally, S can take any value from 30, 50, 80, 100, 120, 150, 180, 200, or a value between any two values.

[0073] According to an embodiment of the present invention, in another aspect, a battery is also provided, comprising: a housing having an opening at at least one end; the aforementioned cover assembly connected to the housing and sealing the opening; and a battery cell disposed within the housing and electrically connected to the electrode structure 2.

[0074] It is worth noting that the battery cell includes a tab, which can be directly connected to the terminal structure 2, or the tab is connected to an adapter piece, which is connected to the terminal structure 2.

[0075] According to an embodiment of the present invention, in another aspect, a battery pack is also provided, comprising a plurality of the above-described batteries.

[0076] Furthermore, in one embodiment, the battery pack also includes a busbar that connects the terminal structures 2 of two batteries to enable the series or parallel connection of several batteries.

[0077] 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 structure, characterized by include: The main body (11) has a first surface (111) and a second surface (112) disposed opposite to each other along the thickness direction of the main body (11), and the main body (11) has a through-hole (113) along its thickness direction. A flange structure (12) is connected to the first surface (111) and protrudes from the first surface (111) along the thickness direction of the body (11). The flange structure (12) is arranged around the pole hole (113). The flange structure (12) has a relief groove (121) on its inner circumferential surface facing the pole hole (113). A cantilever structure (13) is connected to the main body (11), and the cantilever structure (13) extends out of the hole wall of the pole hole (113) on a plane perpendicular to the thickness direction of the main body (11).

2. The cover plate structure according to claim 1, wherein Along the thickness direction of the main body (11), the opening height of the clearance groove (121) on the inner circumferential surface of the pole hole (113) is h1, and the height of the flange structure (12) is h2. The units of h1 and h2 are both mm, and they satisfy 0.015≤h1 / h2≤0.

35.

3. The cover plate structure according to claim 2, characterized in that, Along the thickness direction of the main body (11), the opening height h1 of the clearance groove (121) on the inner circumferential surface of the pole hole (113) satisfies 0.1≤h1≤1, where h1 is in mm.

4. The cover plate structure according to claim 2, wherein Along the thickness direction of the main body (11), the height h2 of the flange structure (12) satisfies 1.2≤h2≤3.5, where h2 is in mm.

5. The cover plate structure according to any one of claims 1 to 4, characterized in that, The recess depth of the avoidance groove (121) from the inner circumference of the flange structure (12) to the outer circumference is t, and the thickness of the flange structure (12) is d. The units of t and d are both mm, and the condition 0.05≤t / d≤0.9 is met.

6. The cover plate structure according to claim 5, wherein The recess depth t of the inner circumference of the flange structure (12) to the outer circumference of the clearance groove (121) satisfies 0.1≤t≤0.9, where t is in mm.

7. The cover plate structure according to claim 5, wherein The thickness of the flange structure (12) is d, which satisfies 0.6≤d≤1.5, and the unit of d is mm.

8. The cover plate structure according to any one of claims 1 to 4, characterized by Along the thickness direction of the main body (11), the distance between the clearance groove (121) and the side of the cantilever structure (13) close to the first surface (111) is h3, and the distance between the clearance groove (121) and the end of the flange structure (12) away from the first surface (111) is h4. The units of h3 and h4 are both mm, and 1≤h3 / h4≤8 is satisfied.

9. The cover plate structure according to claim 8, wherein Along the thickness direction of the main body (11), the distance h3 between the clearance groove (121) and the side of the cantilever structure (13) near the first surface (111) satisfies 0.8≤h3≤3.5, where h3 is in mm.

10. The cover plate structure according to claim 8, wherein Along the thickness direction of the main body (11), the distance h4 between the clearance groove (121) and the end of the flange structure (12) away from the first surface (111) satisfies 0.5≤h4≤1.5, where h4 is in mm.

11. The cover plate structure according to any one of claims 1 to 4, characterized by On the projection plane perpendicular to the thickness direction of the main body (11), the orthographic projection of the flange structure (12) is in the shape of a racetrack.

12. The cover plate structure according to any one of claims 1 to 4, characterized by Along the thickness direction of the main body (11), the thickness of the cantilever structure (13) is k, where k is in mm, and satisfies 0.6≤k≤1.

8.

13. The cover plate structure according to any one of claims 1 to 4, characterized by On a plane perpendicular to the thickness direction of the main body (11), the width of the cantilever structure (13) is L, where L is in mm, and satisfies 1.5≤L≤5.

14. A cover plate assembly characterized by, include: The cover plate structure (1) according to any one of claims 1 to 13; The pole structure (2) is set on the cantilever structure (13), the flange structure (12) is set around the pole structure (2), the flange structure (12) is folded at the clearance groove (121) and pressed on the side of the pole structure (2) away from the main body (11).

15. The cover plate assembly according to claim 14, characterized in that, The pole structure (2) includes a pole body (21) and an insulating member (22). The insulating member (22) is wrapped around the outer periphery of the pole body (21), and the flange structure (12) is pressed onto the side of the insulating member (22) away from the pole body.

16. The cover plate assembly of claim 15, wherein, The flange structure (12) includes a bend (124) corresponding to the location of the clearance groove (121) and flange bodies connected to both sides of the bend (124).

17. The cover plate assembly of claim 16, wherein, A gap is provided between the bend (124) and the insulating element (22).

18. The cover plate assembly of claim 16, wherein, The bend (124) is fitted together with the insulating element (22).

19. The cover plate assembly of claim 16, wherein, The thickness of the flange structure (12) at the bend (124) is e, and the thickness of the flange body is f. The units of e and f are both mm, and they satisfy 0.2≤e / f≤0.

9.

20. The cover plate assembly of claim 19, wherein, The thickness e of the flange structure (12) at the bend (124) satisfies 0.4≤e≤1.5, where e is in mm.

21. The cover plate assembly of claim 19, wherein, The flanged body includes a connecting section (122) connected to the main body (11) and a pressing section (123) pressed onto the pole structure (2). The thickness of the connecting section (122) is f1, and the thickness of the pressing section (123) is f2. The units of f1 and f2 are both mm, and they satisfy 0.6≤f1≤2 and 0.6≤f2≤1.

5.

22. The cover plate assembly of claim 15, wherein, On a projection plane perpendicular to the thickness direction of the main body (11), the overlapping area of ​​the orthographic projection of the flange structure (12), the orthographic projection of the insulating component (22), and the orthographic projection of the pole body (21) is S, where the unit of S is mm. 2 The condition is satisfied that 30≤S≤200.

23. A battery, characterized by include: The housing has an opening at at least one end; The cover assembly according to any one of claims 14 to 22 is connected to the housing and seals the opening; The battery cell is disposed inside the housing and electrically connected to the pole structure (2).

24. A battery pack, comprising: Includes several batteries as described in claim 23.

Images