Collector plate, cover plate assembly, battery and energy storage equipment

Abstract

The invention provides a collector plate, a cover plate assembly, a battery and energy storage equipment. The collector plate comprises a first connecting part, a first bending part, a second connecting part, a second bending part and a third connecting part which are connected in sequence, the first connecting part is used for connecting a battery terminal, and the third connecting part is used for connecting a tab; the first connecting part is bent relative to the second connecting part, the third connecting part is bent relative to the second connecting part, and the second connecting part is located between the first connecting part and the second connecting part; and at least one of the first bending part and the second bending part is provided with a thinning structure. According to the collector plate, the bending difficulty of the bending part can be reduced, so that the first connecting part is easy to bend relative to the second connecting part, the third connecting part is easy to bend relative to the second connecting part, the bending effect is improved, and the occupied space of the bent collector plate is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to current collectors, cover plate assemblies, batteries, and energy storage devices. Background Technology

[0002] Batteries are widely used in energy storage systems, transportation, and consumer electronics. A battery mainly consists of a casing, cover, core, current collector, and tabs.

[0003] The current collector (also called a current collector or busbar) is used to connect the tabs and battery terminals and is an important component of the battery. However, the structure of the current collector still needs improvement in related technologies. Summary of the Invention

[0004] The embodiments of this application provide a collector plate, a cover plate assembly, a battery, and an energy storage device, which can improve the technical problems such as the difficulty of bending the collector plate.

[0005] In a first aspect, embodiments of this application provide a current collector, including a first connecting portion, a first bending portion, a second connecting portion, a second bending portion and a third connecting portion connected in sequence, wherein the first connecting portion is used to connect to a battery terminal and the third connecting portion is used to connect to a tab. The first connecting portion is bent relative to the second connecting portion, the third connecting portion is bent relative to the second connecting portion, and the second connecting portion is located between the first connecting portion and the second connecting portion; At least one of the first bend and the second bend has a thinning structure.

[0006] In one embodiment, the first connecting portion and the second connecting portion are disposed opposite to each other, and the thinning structure includes a first thinning structure formed on the side of the first bending portion facing the first connecting portion and / or the second connecting portion.

[0007] By adopting the above technical solution, it is beneficial to the relative bending of the first connecting part and the second connecting part, and the bending difficulty is reduced.

[0008] In one embodiment, the second connecting portion and the third connecting portion are disposed opposite to each other, and the thinning structure includes a second thinning structure formed on the side of the second bending portion facing the second connecting portion and / or the third connecting portion.

[0009] By adopting the above technical solution, it is beneficial to the relative bending of the second and third connecting parts, and the bending difficulty is reduced.

[0010] In one embodiment, the orientation of the slot in the first thinning structure is opposite to the orientation of the slot in the second thinning structure; and / or, The bending directions of the first connecting portion and the third connecting portion are opposite. The first thinning structure is disposed on the inner side of the first bending portion, and the second thinning structure is disposed on the inner side of the second bending portion.

[0011] By adopting the above technical solution, after the current collector is bent, the second connecting part is located between the first connecting part and the third connecting part, which facilitates the connection between the first connecting part and the battery terminal and the connection between the third connecting part and the electrode tab.

[0012] In one embodiment, the thinning structure includes a thinning groove, the groove wall of which includes a first wall surface, a second wall surface, and a third wall surface connected in sequence, the first wall surface and the third wall surface being planar, and the second wall surface being arc-shaped.

[0013] By adopting the above technical solution, the problem of stress concentration can be eliminated. Furthermore, when bending occurs at the bend, the degree of tearing at the crease can be reduced, minimizing damage to the structure and improving safety.

[0014] In one embodiment, the radius of the arcuate surface is r, where 0.05mm ≤ r ≤ 5mm.

[0015] By adopting the above technical solution, while reducing the impact on the structural strength of the bending part, the problem of stress concentration at the thinned structure can be effectively avoided, and the thinned structure can be prevented from tearing.

[0016] Secondly, embodiments of this application provide a current collector, which is laid flat and includes a first connecting part, a second connecting part, and a third connecting part connected in sequence. The first connecting part is bendable relative to the second connecting part, and the third connecting part is bendable relative to the second connecting part. The first connecting part is used to connect to a battery terminal, and the third connecting part is used to connect to a tab. The collector plate also includes a bending portion, which has a thinning structure. The bending portion connects the first connecting portion and the second connecting portion, and / or the bending portion connects the second connecting portion and the third connecting portion.

[0017] In one embodiment, both ends of the thinning structure extend along the axis of the bent portion; and / or, The thinning structure extends to the edge of the bend.

[0018] By adopting the above technical solution, the length of the thinned structure in the bending part is guaranteed, which can effectively reduce the bending difficulty of the bending part and improve the bending effect.

[0019] In one embodiment, the thickness of the first connecting portion is h1, the thickness of the second connecting portion is h2, and the thickness of the third connecting portion is h3, wherein... h1≥h3; and / or, h2≥h3.

[0020] By adopting the above technical solution, the thickness of the first connecting part is ensured, giving it good bending resistance and guaranteeing its structural stability. Similarly, the thickness of the second connecting part is ensured, giving it good bending resistance and guaranteeing its structural stability.

[0021] In one embodiment, the bending portion includes a first bending portion and a second bending portion, the first bending portion connecting the first connecting portion and the second connecting portion, and the second bending portion connecting the second connecting portion and the third connecting portion; The thinning structure includes a first thinning structure and a second thinning structure, wherein the first thinning structure is formed in the first bending portion and the second thinning structure is formed in the second bending portion.

[0022] By adopting the above technical solution, the first bending portion can be bent, allowing the first connecting portion to be bent relative to the second connecting portion. Providing a first thinning structure at the first bending portion reduces the bending difficulty of the first bending portion, making it easier for the first connecting portion to bend relative to the second connecting portion. The second bending portion can be bent, allowing the third connecting portion to bend relative to the second connecting portion. Providing a second thinning structure at the second bending portion reduces the bending difficulty of the second bending portion, making it easier for the third connecting portion to bend relative to the second connecting portion.

[0023] In one embodiment, the collector plate further includes a connecting block that connects the third connecting portion and the second connecting portion. At least a portion of the connecting block is stacked on the second connecting portion, and the connecting block and the first thinning structure are located on the same side of the second connecting portion.

[0024] By adopting the above technical solution, it is easy to connect the connecting block and the second connecting part, so that the connecting block can connect the second connecting part and the third connecting part.

[0025] In one embodiment, the third connecting portion, the second bending portion, and the connecting block are integrally formed; and / or, The second bending portion is located between the third connecting portion and the connecting block.

[0026] By adopting the above technical solution, the structural stability of the collector plate can be improved. This also allows the second bending portion to be closer to the third connecting portion, facilitating the bending of the third connecting portion.

[0027] In one embodiment, a second notch is formed on the outer side of the second bend.

[0028] By adopting the above technical solution, the bending difficulty of the second bending part can be reduced, thereby reducing the bending difficulty of the third connecting part relative to the second connecting part, which is conducive to improving the bending effect and reducing the space occupied by the third connecting part and the second connecting part.

[0029] In one embodiment, the thickness of the first connecting portion is h1, the thickness of the second connecting portion is h2, the thickness of the first bent portion is h4, and the thickness of the second bent portion is h5, wherein... h1≥h4; and / or, h2≥h4; and / or, h1≥h5; and / or, h2≥h5.

[0030] By adopting the above technical solution, the thickness of the first connecting part is ensured, giving it good bending resistance and structural stability. This also avoids the situation where excessive thickness of the first bending part would lead to excessive bending difficulty. Similarly, the thickness of the second connecting part is ensured, giving it good bending resistance and structural stability. This also avoids the situation where excessive thickness of the first bending part would lead to excessive bending difficulty.

[0031] In one embodiment, 0.2h1 ≤ h4 ≤ 0.9h1; and / or, 0.2h² ≤ h⁴ ≤ 0.9h²; and / or, 0.2h1≤h5≤0.9h1; and / or, 0.2h2≤h5≤0.9h2.

[0032] By adopting the above technical solution, the structural strength and stability of the first bending portion are ensured, and the first connecting portion is made easy to bend relative to the second connecting portion. The structural strength and stability of the second bending portion are also ensured, and the third connecting portion is made easy to bend relative to the second connecting portion.

[0033] Thirdly, embodiments of this application provide a cover plate assembly including the collector plate as described above.

[0034] Fourthly, embodiments of this application provide a battery including the cover assembly described above.

[0035] Fifthly, embodiments of this application provide an energy storage device including the battery described above.

[0036] The beneficial effects of the embodiments of this application are as follows: In the embodiments of this application, the first connecting portion is bent relative to the second connecting portion, which reduces the space occupied by the first and second connecting portions. Similarly, the third connecting portion is bent relative to the second connecting portion, which reduces the space occupied by both the second and third connecting portions. This makes the structure of the current collector more compact and reduces its overall space requirement. The bent portion can be bent. When the bent portion connects the first and second connecting portions, the first connecting portion can be bent relative to the second connecting portion. When the bent portion connects the second and third connecting portions, the third connecting portion can be bent relative to the second connecting portion. Providing a thinning structure at the bent portion reduces the difficulty of bending, making it easier for the first and third connecting portions to bend relative to the second connecting portion, and also improves the bending effect, reducing the space occupied by the current collector after bending. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the collector disk provided in one embodiment of this application; Figure 2 This is a side view of the collector disk provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a cover plate assembly provided in one embodiment of this application; Figure 4 This is a schematic diagram of the cover plate assembly provided in one embodiment of this application, wherein the collector plate is in a bent state; Figure 5 This is a schematic diagram of the structure of the collector disk provided in another embodiment of this application; Figure 6 This is a side view of the manifold provided in another embodiment of this application; Figure 7 This is a schematic diagram of the structure of a cover plate assembly provided in another embodiment of this application; Figure 8 This is a schematic diagram of the cover plate assembly provided in another embodiment of this application, wherein the collector plate is in a bent state.

[0039] Explanation of reference numerals in the attached figures: 1. First connecting part; 2. Second connecting part; 3. Third connecting part; 4. Bending part; 5. Connecting block; 6. Structural reinforcement part; 7. Structural reinforcement block; 8. First gap; 9. Second gap; 10. Cover plate; 11. Connecting part; 41. Thinning structure; 42. First bending part; 43. Second bending part; 61. Flanged structure; 411. First thinning structure; 413. First wall surface; 414. Second wall surface; 415. Third wall surface; 421. First notch; 431. Second notch; 611. First flange; 612. Second flange. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0041] The following is combined Figures 1 to 8 This application describes the current collector, cover plate assembly, battery, and energy storage device.

[0042] According to the embodiments of the first aspect of this application, such as Figure 4 As shown, the current collector includes a first connecting part 1, a first bending part 42, a second connecting part 2, a second bending part 43 and a third connecting part 3 connected in sequence. The first connecting part 1 is used to connect to the battery terminal and the third connecting part 3 is used to connect to the electrode tab. The first connecting part 1 is bent relative to the second connecting part 2, the third connecting part 3 is bent relative to the second connecting part 2, and the second connecting part 2 is located between the first connecting part 1 and the second connecting part 2; At least one of the first bend 42 and the second bend 43 has a thinning structure 41.

[0043] It is understood that the collector plate in this embodiment is in a bent state. The bending of the first connecting portion 1 relative to the second connecting portion 2 reduces the space occupied by both the first and second connecting portions 1 and 2. Similarly, the bending of the third connecting portion 3 relative to the second connecting portion 2 reduces the space occupied by both the second and third connecting portions 2 and 3. This results in a more compact structure for the collector plate and a smaller overall space occupied. The thinning structure 41 at the bending portion 4 reduces the difficulty of bending the portion 4, making it easier for the first connecting portion 1 and the third connecting portion 3 to bend relative to the second connecting portion 2. This also improves the bending effect and reduces the space occupied by the bent collector plate.

[0044] In some embodiments, such as Figure 4 As shown, the first connecting portion 1 and the second connecting portion 2 are disposed opposite to each other. The thinning structure 41 includes a first thinning structure 411, which is formed on the side of the first bending portion 42 facing the first connecting portion 1 and / or the second connecting portion 2.

[0045] This facilitates the relative bending of the first connecting part 1 and the second connecting part 2, reducing the difficulty of bending.

[0046] For example, there is a first gap 8 between the first connecting part 1 and the second connecting part 2, and the slot of the first thinning structure 411 faces the first gap 8.

[0047] It is understandable that the first connecting part 1 is bent relative to the second connecting part 2, and the first connecting part 1 and the second connecting part 2 are arranged opposite each other. Therefore, the slot of the first thinning structure 411 is designed to face the first gap 8 between the first connecting part 1 and the second connecting part 2, which is beneficial to the relative bending of the first connecting part 1 and the second connecting part 2 and reduces the difficulty of bending.

[0048] In some examples, the first thinning structure 411 is formed on the side of the first bend 42 facing the first connecting portion 1 and / or the second connecting portion 2. This means that the orientation of the first thinning structure is the same as the bending direction of the first connecting portion 1 relative to the second connecting portion 2. It can also be understood that the first thinning structure is formed on the inner side of the first bend, that is, on the side of the first bend facing the bending direction of the first connecting portion 1.

[0049] In some embodiments, such as Figure 4 As shown, the second connecting portion 2 and the third connecting portion 3 are disposed opposite to each other, and the thinning structure 41 includes a second thinning structure. The second thinning structure is formed on the side of the second bending portion 43 facing the second connecting portion 2 and / or the third connecting portion 3.

[0050] This facilitates the relative bending of the second connecting part 2 and the third connecting part 3, reducing the difficulty of bending.

[0051] For example, there is a second gap 9 between the second connecting part 2 and the third connecting part 3, and the slot of the second thinning structure faces the second gap 9.

[0052] It is understandable that the third connection is bent relative to the second connection 2, and the third connection 3 is positioned opposite to the second connection 2. Therefore, the slot of the second thinning structure is designed to face the second gap 9 between the second connection 2 and the third connection 3, which facilitates the relative bending of the second connection 2 and the third connection 3 and reduces the difficulty of bending.

[0053] In some examples, the second thinning structure is formed on the side of the second bend 43 facing the second connecting portion 2 and / or the third connecting portion 3. This means that the orientation of the second thinning structure is the same as the bending direction of the second connecting portion 2 relative to the third connecting portion 3. It can also be understood that the second thinning structure is formed on the inner side of the second bend, that is, on the side of the second bend facing the bending direction of the second connecting portion 2.

[0054] In some implementations, the orientation of the slot of the first thinning structure 411 is opposite to the orientation of the slot of the second thinning structure.

[0055] It is understandable that if the orientation of the slot of the first thinning structure 411 is the same as the orientation of the slot of the second thinning structure, then after the current collector is bent, the third connecting part 3 will be located between the first connecting part 1 and the second connecting part 2, which is not conducive to the connection between the third connecting part 3 and the electrode tab. Therefore, in this embodiment, the orientation of the slot of the first thinning structure 411 is designed to be opposite to the orientation of the slot of the second thinning structure, so that after the current collector is bent, the second connecting part 2 is located between the first connecting part 1 and the third connecting part 3, which facilitates the connection between the first connecting part 1 and the battery terminal, and facilitates the connection between the third connecting part 3 and the electrode tab.

[0056] In some embodiments, the bending directions of the first connecting portion and the third connecting portion are opposite, the first thinning structure is disposed inside the first bending portion, and the second thinning structure is disposed inside the second bending portion.

[0057] Thus, when bending the first and third connecting parts, the deformation at the first and second bending parts will not cause breakage.

[0058] In some embodiments, such as Figure 4 As shown, the thinning structure 41 includes a thinning groove. The groove wall of the thinning groove includes a first wall surface 413, a second wall surface 414 and a third wall surface 415 connected in sequence. The first wall surface 413 and the third wall surface 415 are planar, and the second wall surface 414 is an arc-shaped surface.

[0059] This helps to eliminate stress concentration. Furthermore, when bending occurs at the bend 4, it reduces the tearing degree of the crease, minimizes damage to the structure, and improves safety.

[0060] Specifically, the radius of the curved surface is r, where 0.05mm ≤ r ≤ 5mm.

[0061] Understandably, if the radius corresponding to the arc-shaped surface is less than 0.05 mm, stress concentration is still likely to occur at the thinned structure 41, and tearing is likely to occur at the thinned structure 41 when the bending portion 4 bends. If the radius corresponding to the arc-shaped surface is greater than 5 mm, the size of the thinned structure 41 will be too large, affecting the structural strength of the bending portion 4. Therefore, in this embodiment, the radius of the arc-shaped surface is set between 0.05 mm and 5 mm. This reduces the impact on the structural strength of the bending portion 4 while effectively avoiding stress concentration at the thinned structure 41 and preventing tearing of the thinned structure 41.

[0062] In some embodiments, such as Figure 8 As shown, the collector plate also includes a structural reinforcement part 6, which is connected to the first connecting part 1.

[0063] It is understood that the collector plate in this embodiment is in a bent state. By providing a structural reinforcement 6 at the first connecting part 1, the bending resistance and structural strength of the first connecting part 1 can be improved, ensuring the structural stability of the first connecting part 1.

[0064] In some embodiments, such as Figure 8 As shown, the structural reinforcement 6 is located between the first connecting part 1 and the second connecting part 2, and the structural reinforcement 6 is connected to the second connecting part 2.

[0065] Thus, the structural reinforcement 6 can connect the first connecting part 1 and the second connecting part 2, and the structural reinforcement 6 can provide support between the first connecting part 1 and the second connecting part 2, so that the first connecting part 1 and the second connecting part 2 remain relatively stable, which is beneficial to improving the structural stability of the collector plate.

[0066] In some embodiments, the structural reinforcement 6 is made of a conductive material.

[0067] Thus, the structural reinforcement part 6 can be electrically connected to the first connection part 1 and the second connection part 2, which helps to shorten the current path and increase the current path, thereby improving the current carrying capacity of the current collector.

[0068] In some embodiments, such as Figure 8 As shown, the distance between the first connecting part 1 and the second connecting part 2 is L1, and the thickness of the structural reinforcement part 6 is H1, wherein H1≥L1.

[0069] This ensures that the structural reinforcement 6 can stably connect the first connecting part 1 and the second connecting part 2.

[0070] In some embodiments, such as Figure 8 As shown, the collector also includes a structural reinforcing block 7, which is located between the second connecting part 2 and the third connecting part 3, and connects the second connecting part 2 and the third connecting part 3.

[0071] Thus, the structural reinforcing block 7 can connect the third connecting part 3 and the second connecting part 2, and the structural reinforcing part 6 can provide support between the third connecting part 3 and the second connecting part 2, so that the third connecting part 3 and the second connecting part 2 remain relatively stable, which is beneficial to improving the structural stability of the collector plate.

[0072] In some embodiments, the structural reinforcement block 7 is made of a conductive material.

[0073] Thus, the structural reinforcement block 7 can be electrically connected to the third connecting part 3 and the second connecting part 2, which helps to shorten the current path and increase the current path, thereby improving the current carrying capacity of the current collector.

[0074] In some embodiments, the distance between the second connecting part 2 and the third connecting part 3 is L2, and the thickness of the structural reinforcing block 7 is H2, wherein H2≥L2.

[0075] This ensures that the structural reinforcing block 7 can stably connect the first connecting part 1 and the second connecting part 2.

[0076] According to an embodiment of the second aspect of this application, such as Figure 1 and Figure 2 As shown, the current collector is laid flat. The current collector includes a first connecting part 1, a second connecting part 2 and a third connecting part 3 connected in sequence. The first connecting part 1 can be bent relative to the second connecting part 2, and the third connecting part 3 can be bent relative to the second connecting part 2. The first connecting part 1 is used to connect the battery terminal, and the third connecting part 3 is used to connect the electrode tab. The collector also includes a bending portion 4, which has a thinning structure 41. The bending portion 4 connects the first connecting portion 1 and the second connecting portion 2, and / or the bending portion 4 connects the second connecting portion 2 and the third connecting portion 3.

[0077] According to the current collector of this application, the first connecting portion 1 is bent relative to the second connecting portion 2, which reduces the space occupied by the first connecting portion 1 and the second connecting portion 2. Similarly, the third connecting portion 3 is bent relative to the second connecting portion 2, which reduces the space occupied by both the second connecting portion 2 and the third connecting portion 3. This makes the current collector structure more compact and reduces its space occupation. The bending portion 4 can be bent. When the bending portion 4 connects the first connecting portion 1 and the second connecting portion 2, the first connecting portion 1 can be bent relative to the second connecting portion 2. When the bending portion 4 connects the second connecting portion 2 and the third connecting portion 3, the third connecting portion 3 can be bent relative to the second connecting portion 2. Providing a thinning structure 41 at the bending portion 4 reduces the difficulty of bending the bending portion 4, making it easier for the first connecting portion 1 to bend relative to the second connecting portion 2 and for the third connecting portion 3 to bend relative to the second connecting portion 2. This also improves the bending effect and reduces the space occupied by the current collector after bending.

[0078] In some embodiments, both ends of the thinning structure 41 extend along the axis of the bending portion 4.

[0079] In this way, the bending part 4 is ensured to have the length of the thinning structure 41, so that the thinning structure 41 can effectively reduce the bending difficulty of the bending part 4 and improve the bending effect.

[0080] In some embodiments, the thinning structure 41 extends to the edge of the bend 4.

[0081] In this way, the bending part 4 is ensured to have the length of the thinning structure 41, so that the thinning structure 41 can effectively reduce the bending difficulty of the bending part 4 and improve the bending effect.

[0082] In some embodiments, such as Figure 2 As shown, the thickness of the first connecting part 1 is h1, the thickness of the second connecting part 2 is h2, and the thickness of the third connecting part 3 is h3.

[0083] Specifically, h1 ≥ h3.

[0084] This ensures the thickness of the first connecting part 1, giving it good bending resistance and guaranteeing its structural stability.

[0085] Specifically, h2 ≥ h3.

[0086] This ensures the thickness of the second connecting part 2, giving it good bending resistance and guaranteeing its structural stability.

[0087] In some embodiments, such as Figure 1 and Figure 2As shown, the bending part 4 includes a first bending part 42 and a second bending part 43. The first bending part 42 connects the first connecting part 1 and the second connecting part 2, and the second bending part 43 connects the second connecting part 2 and the third connecting part 3. The thinning structure 41 includes a first thinning structure 411 and a second thinning structure, wherein the first thinning structure 411 is formed in the first bending portion 42 and the second thinning structure is formed in the second bending portion 43.

[0088] Understandably, the first bending portion 42 can be bent so that the first connecting portion 1 can be bent relative to the second connecting portion 2. Providing a first thinning structure 411 at the first bending portion 42 reduces the difficulty of bending the first bending portion 42, making it easier for the first connecting portion 1 to bend relative to the second connecting portion 2. The second bending portion 43 can be bent so that the third connecting portion 3 can be bent relative to the second connecting portion 2. Providing a second thinning structure at the second bending portion 43 reduces the difficulty of bending the second bending portion 43, making it easier for the third connecting portion 3 to bend relative to the second connecting portion 2.

[0089] In some embodiments, such as Figure 1 and Figure 2 As shown, the collector also includes a connecting block 5, which connects the third connecting part 3 and the second connecting part 2, with at least a portion of the connecting block 5 stacked on the second connecting part 2.

[0090] This facilitates the connection between the connecting block 5 and the second connecting part 2, allowing the connecting block 5 to connect the second connecting part 2 and the third connecting part 3.

[0091] In some examples, the connecting block 5 is connected to the second connecting part 2 by welding or snap-fitting.

[0092] In some examples, the connecting block 5 is integrally formed with the third connecting part 3.

[0093] In some embodiments, the connecting block 5 and the first thinning structure 411 are located on the same side of the second connecting portion 2.

[0094] Thus, there is a step difference between the connecting block 5 and the second connecting part 2, which can form a second thinning structure.

[0095] In some embodiments, the third connecting portion 3, the second bending portion 43, and the connecting block 5 are integrally formed.

[0096] This can improve the structural stability of the collector plate.

[0097] In some embodiments, the second bend 43 is located between the third connecting portion 3 and the connecting block 5.

[0098] This makes the second bending portion 43 closer to the third connecting portion 3, which facilitates the bending of the third connecting portion 3.

[0099] In some embodiments, such as Figure 1 and Figure 2 As shown, a second notch 431 is formed on the outer side of the second bend 43.

[0100] In this way, the bending difficulty of the second bending part 43 can be reduced, thereby reducing the bending difficulty of the third connecting part 3 relative to the second connecting part 2, which is conducive to improving the bending effect and reducing the space occupied by the third connecting part 3 and the second connecting part 2.

[0101] In some embodiments, such as Figure 1 and Figure 2 As shown, the thickness of the first connecting part 1 is h1, the thickness of the second connecting part 2 is h2, the thickness of the first bending part 42 is h4, and the thickness of the second bending part 43 is h5.

[0102] Specifically, h1 ≥ h4.

[0103] This ensures the thickness of the first connecting part 1, giving it good bending resistance and guaranteeing its structural stability. It also avoids the situation where the thickness of the first bending part 42 is too large, leading to excessive bending difficulty.

[0104] Specifically, h2 ≥ h4.

[0105] This ensures the thickness of the second connecting part 2, giving it good bending resistance and guaranteeing its structural stability. It also avoids the situation where the thickness of the first bending part 42 is too large, leading to excessive bending difficulty.

[0106] Specifically, h1 ≥ h5.

[0107] This ensures the thickness of the first connecting part 1, giving it good bending resistance and guaranteeing its structural stability. It also avoids the situation where the thickness of the second bending part 43 is too large, leading to excessive bending difficulty.

[0108] Specifically, h2 ≥ h5.

[0109] This ensures the thickness of the second connecting part 2, giving it good bending resistance and guaranteeing its structural stability. It also avoids the situation where the thickness of the second bending part 43 is too large, leading to excessive bending difficulty.

[0110] In some embodiments, such as Figure 1 and Figure 2 As shown, the thickness of the first connecting part 1 is h1, the thickness of the second connecting part 2 is h2, the thickness of the first bending part 42 is h4, and the thickness of the second bending part 43 is h5.

[0111] Specifically, 0.2h1≤h4≤0.9h1.

[0112] Understandably, if the thickness of the first bending portion 42 is less than 0.2 times the thickness of the first connecting portion 1, the thickness of the first bending portion 42 is too small, the structural strength of the first bending portion 42 is too low, and it is prone to breakage. If the thickness of the first bending portion 42 is greater than 0.9 times the thickness of the first connecting portion 1, the thickness of the first bending portion 42 is too large, the bending of the first bending portion 42 is more difficult, and it is not conducive to the relative bending of the first connecting portion 1 and the second connecting portion 2. Therefore, in this embodiment, the thickness of the first bending portion 42 is set between 0.2 times the thickness of the first connecting portion 1 and 0.9 times the thickness of the first connecting portion 1, which ensures the structural strength and structural stability of the first bending portion 42, and makes the first connecting portion 1 easy to bend relative to the second connecting portion 2.

[0113] Specifically, 0.2h2≤h4≤0.9h2.

[0114] Understandably, if the thickness of the first bending portion 42 is less than 0.2 times the thickness of the second connecting portion 2, the thickness of the first bending portion 42 is too small, resulting in low structural strength and a high risk of breakage. Conversely, if the thickness of the first bending portion 42 is greater than 0.9 times the thickness of the second connecting portion 2, the thickness of the first bending portion 42 is too large, making bending difficult and hindering the relative bending of the first connecting portion 1 and the second connecting portion 2. Therefore, in this embodiment, the thickness of the first bending portion 42 is set between 0.2 times and 0.9 times the thickness of the first connecting portion 1, ensuring the structural strength and stability of the first bending portion 42 while facilitating bending of the first connecting portion 1 relative to the second connecting portion 2.

[0115] Specifically, 0.2h1≤h5≤0.9h1.

[0116] Understandably, if the thickness of the second bending portion 43 is less than 0.2 times the thickness of the first connecting portion 1, the thickness of the second bending portion 43 is too small, resulting in low structural strength and a high risk of breakage. Conversely, if the thickness of the second bending portion 43 is greater than 0.9 times the thickness of the first connecting portion 1, the thickness of the second bending portion 43 is too large, making bending difficult and hindering the relative bending of the third connecting portion 3 with the second connecting portion 2. Therefore, in this embodiment, the thickness of the second bending portion 43 is set between 0.2 times and 0.9 times the thickness of the first connecting portion 1, ensuring the structural strength and stability of the second bending portion 43 and facilitating the bending of the third connecting portion 3 relative to the second connecting portion 2.

[0117] Specifically, 0.2h2≤h5≤0.9h2.

[0118] Understandably, if the thickness of the second bending portion 43 is less than 0.2 times the thickness of the second connecting portion 2, the thickness of the second bending portion 43 is too small, resulting in low structural strength and a high risk of breakage. Conversely, if the thickness of the second bending portion 43 is greater than 0.9 times the thickness of the second connecting portion 2, the thickness of the second bending portion 43 is too large, making bending difficult and hindering the relative bending of the third connecting portion 3 with the second connecting portion 2. Therefore, in this embodiment, the thickness of the second bending portion 43 is set between 0.2 and 0.9 times the thickness of the second connecting portion 2, ensuring the structural strength and stability of the second bending portion 43 while facilitating bending of the third connecting portion 3 relative to the second connecting portion 2.

[0119] In some examples, the cross-section of the bend 4 is one of a rectangle, an arc, or a trapezoid.

[0120] In some embodiments, such as Figure 5 and Figure 6 As shown, the collector plate also includes a structural reinforcement part 6, which is connected to the first connecting part 1.

[0121] It is understood that the first connecting part 1 is used to connect the battery terminal and the second connecting part 2 so that the battery terminal and the tab are electrically connected. By providing a structural reinforcement part 6 at the first connecting part 1, the bending resistance and structural strength of the first connecting part 1 can be improved, ensuring the structural stability of the first connecting part 1.

[0122] It is understandable that, since the first connecting part 1 can be bent relative to the second connecting part 2 and the third connecting part 3 can be bent relative to the second connecting part 2, the current collector can be bent when it is assembled into the battery, so that the current collector is in a bent state.

[0123] It is understandable that when the structural reinforcement 6 is made of a conductive material, the structural reinforcement 6 can also improve the current carrying capacity of the first connection part 1.

[0124] In some examples, the structural reinforcement 6 protrudes from the first connecting portion 1, while there is no structural reinforcement 6 at the first bending portion, so a first thinning structure can be formed at the first bending portion.

[0125] In some embodiments, such as Figure 5 and Figure 6 As shown, the structural reinforcement 6 includes a flange structure 61 connected to the first connecting part 1. The flange structure 61 can be bent relative to the first connecting part 1 to be stacked on the first connecting part 1.

[0126] It is understandable that bending the flange structure 61 relative to the first connecting part 1 and stacking it on the first connecting part 1 can increase the thickness of the first connecting part 1, thereby improving the bending resistance and structural strength of the first connecting part 1 by utilizing the flange structure 61, and ensuring the structural stability of the first connecting part 1.

[0127] In some examples, the flange structure 61 is integrally formed with the first connecting part 1.

[0128] In some examples, the flange structure 61 is connected to the first connecting part 1 by welding.

[0129] In some embodiments, such as Figure 5 and Figure 6 As shown, the flange structure 61 includes at least a first flange 611 and a second flange 612. The first connecting part 1, the first flange 611 and the second flange 612 are connected in sequence. The first flange 611 can be bent relative to the first connecting part 1, and the second flange 612 can be bent relative to the first flange 611, so that the first flange 611 and the second flange 612 are stacked on the first connecting part 1.

[0130] In this way, the first connecting part 1 is provided with a first flange 611 and a second flange 612 that are stacked on top of each other, so that both the first flange 611 and the second flange 612 can strengthen the first connecting part 1, effectively improve the bending resistance of the first connecting part 1, and ensure the structural stability of the first connecting part 1.

[0131] It is understandable that the first flange 611 and the second flange 612 are stacked on the first connecting part 1, which can mean that the first connecting part 1, the first flange 611 and the second flange 612 are stacked in sequence, or it can mean that the first connecting part 1, the second flange 612 and the first flange 611 are stacked in sequence.

[0132] In some examples, there are at least two flange structures 61 on the same side.

[0133] In some examples, the second flange 612 is first bent relative to the first flange 611, so that the second flange 612 is stacked on the first flange 611, and then the first flange 611 is folded relative to the first connecting part 1, so that the first connecting part 1, the second flange 612 and the first flange 611 are stacked in sequence.

[0134] In some examples, the first flange 611 is first folded relative to the first connecting part 1, and then the second flange 612 is bent relative to the first flange 611, so that the first connecting part 1, the first flange 611 and the second flange 612 are stacked in sequence.

[0135] In some embodiments, such as Figure 5As shown, the first connecting part 1 has a connecting part 11 that connects to the battery terminal.

[0136] Specifically, the structural reinforcement 6 and the connecting part 11 are spaced apart.

[0137] In this way, the structural reinforcement 6 will not interfere with the connection between the first connecting part 1 and the battery terminal, and can prevent the structural reinforcement 6 from affecting the connection between the first connecting part 1 and the battery terminal.

[0138] Specifically, the structural reinforcement 6 is adjacent to the connecting part 11.

[0139] In this way, the structural reinforcement 6 can be prevented from affecting the connection between the first connecting part 1 and the battery terminal.

[0140] Specifically, the structural reinforcement 6 and the connecting part 11 partially overlap.

[0141] In this way, the structural reinforcement 6 can be prevented from completely obscuring the connection part 11, ensuring that the connection part 11 can still be connected to the battery terminal.

[0142] In some embodiments, such as Figure 5 and Figure 6 As shown, the collector plate also includes a first bending portion 42, which connects the first connecting portion 1 and the second connecting portion 2.

[0143] It is understandable that the first bending portion 42 can be bent so that the first connecting portion 1 can be bent relative to the second connecting portion 2.

[0144] Specifically, the structural reinforcement 6 and the first bending part 42 are spaced apart.

[0145] In this way, the structural reinforcement 6 can be prevented from affecting the bending of the first bending portion 42, ensuring that the first connecting portion 1 can be bent relative to the second connecting portion 2.

[0146] Specifically, the structural reinforcement 6 is adjacent to the first bending part 42.

[0147] In this way, the structural reinforcement 6 can be prevented from affecting the bending of the first bending portion 42, ensuring that the first connecting portion 1 can be bent relative to the second connecting portion 2.

[0148] Specifically, the structural reinforcement 6 and the first bending part 42 partially overlap.

[0149] In this way, the influence of the structural reinforcement 6 on the bending performance of the first bending part 42 can be reduced, ensuring that the first connecting part 1 can be bent relative to the second connecting part 2.

[0150] In some embodiments, such as Figure 5 and Figure 6As shown, the collector also includes a second bending portion 43, which connects the second connecting portion 2 and the third connecting portion 3. The maximum thickness of the second connecting portion 2 is h2, the thickness of the first bending portion 42 is h4, and the thickness of the second bending portion 43 is h5.

[0151] Understandably, the second bending portion 43 can be bent so that the third connecting portion 3 can be bent relative to the second connecting portion 2.

[0152] Specifically, h2 ≥ 2h4.

[0153] This ensures the thickness of the second connecting part 2, giving it good bending resistance and guaranteeing its structural stability.

[0154] Specifically, h2 ≥ 2h5.

[0155] This ensures the thickness of the second connecting part 2, giving it good bending resistance and guaranteeing its structural stability.

[0156] In some embodiments, such as Figure 5 and Figure 6 As shown, a first notch 421 is formed on the outer side of the first bend 42.

[0157] In this way, the bending difficulty of the first bending part 42 can be reduced, thereby reducing the bending difficulty of the first connecting part 1 relative to the second connecting part 2, which is conducive to improving the bending effect and reducing the space occupied by the first connecting part 1 and the second connecting part 2.

[0158] In some embodiments, a second notch 431 is formed on the outer side of the second bend 43.

[0159] In this way, the bending difficulty of the second bending part 43 can be reduced, thereby reducing the bending difficulty of the third connecting part 3 relative to the second connecting part 2, which is conducive to improving the bending effect and reducing the space occupied by the third connecting part 3 and the second connecting part 2.

[0160] In some embodiments, such as Figure 5 and Figure 6 As shown, the collector plate also includes a structural reinforcing block 7 connected to the second connecting part 2.

[0161] In this way, the bending resistance and structural strength of the second connecting part 2 can be improved by the structural reinforcing block 7, thus ensuring the structural stability of the second connecting part 2.

[0162] For example, the structural reinforcing block 7 protrudes from the second connecting portion 2, and there is no structural reinforcing block 7 at the second bending portion, thereby forming a second thinning structure at the second bending portion.

[0163] Specifically, there are at least two structural reinforcing blocks 7, and at least two structural reinforcing blocks 7 are stacked sequentially on the second connecting part 2.

[0164] In this way, the bending resistance and structural strength of the second connecting part 2 can be effectively improved, and the structural stability of the second connecting part 2 can be guaranteed.

[0165] Specifically, the length of the structural reinforcing block 7 is less than or equal to the length of the second connecting part 2.

[0166] In this way, the structural reinforcing block 7 can be prevented from protruding from the second connecting part 2, and the structural reinforcing block 7 can be prevented from affecting the relative bending between the first connecting part 1 and the second connecting part 2, and the structural reinforcing block 7 can be prevented from affecting the relative bending between the third connecting part 3 and the second connecting part 2.

[0167] In some examples, the structural reinforcing block 7 is, for example, a folded edge connected to the second connecting portion 2. Exemplarily, the folded edge is integrally formed with the second connecting portion 2, or the folded edge is connected to the second connecting portion 2 by welding.

[0168] In some examples, the relationship between the structural reinforcement block 7 and the first bending portion 42 is one of spacing, adjacency, and partial overlap, to ensure that the first bending portion 42 can be bent smoothly.

[0169] In some examples, the relationship between the structural reinforcement block 7 and the second bending portion 43 is one of spacing, adjacency, and partial overlap, to ensure that the second bending portion 43 can be bent smoothly.

[0170] In some embodiments, such as Figure 6 As shown, the maximum thickness of the first connecting part 1 is h1, the maximum thickness of the second connecting part 2 is h2, and the thickness of the third connecting part 3 is h3.

[0171] In some examples, the maximum thickness of the first connecting part 1 refers to the total thickness of the first connecting part 1 and the structural reinforcement part 6.

[0172] In some examples, the maximum thickness of the second connecting part 2 refers to the total thickness of the second connecting part 2 and the structural reinforcing block 7.

[0173] Specifically, h1 ≥ 2h3.

[0174] This ensures the thickness of the first connecting part 1, giving it good bending resistance and guaranteeing its structural stability.

[0175] Specifically, h2 ≥ 2h3.

[0176] This ensures the thickness of the second connecting part 2, giving it good bending resistance and guaranteeing its structural stability.

[0177] According to the embodiments of the third aspect of this application, such as Figure 3 and Figure 7 As shown, the cover plate assembly includes the aforementioned manifold.

[0178] According to the cover plate assembly of the present application embodiment, a thinning structure 41 is provided at the bending portion 4, which can reduce the bending difficulty of the bending portion 4, making the first connecting portion 1 easier to bend relative to the second connecting portion 2, making the third connecting portion 3 easier to bend relative to the second connecting portion 2, and improving the bending effect, reducing the space occupied by the collector after bending, and thus helping to reduce the overall size of the cover plate assembly.

[0179] In some embodiments, such as Figure 7 As shown, the cover assembly includes a cover 10, which is provided with a battery terminal, and the first connecting part 1 is connected to the battery terminal.

[0180] In some embodiments, the cover assembly is further provided with an explosion-proof valve connected to the cover 10.

[0181] Specifically, along the axial direction of the cover plate assembly, the orthogonal projection of the manifold on the cover plate 10 is spaced apart from the orthogonal projection of the explosion-proof valve on the cover plate 10.

[0182] This prevents the manifold from clogging the explosion-proof valve, ensuring that in the event of thermal runaway of the battery, the gas and heat generated by thermal runaway can be smoothly discharged to the outside through the explosion-proof valve.

[0183] Specifically, along the axial direction of the cover assembly, the orthographic projection of the manifold on the cover 10 is adjacent to the orthographic projection of the explosion-proof valve on the cover 10.

[0184] This prevents the manifold from clogging the explosion-proof valve, ensuring that in the event of thermal runaway of the battery, the gas and heat generated by thermal runaway can be smoothly discharged to the outside through the explosion-proof valve.

[0185] Specifically, along the axial direction of the cover plate assembly, the orthographic projection of the manifold on the cover plate 10 coincides with the orthographic projection of the explosion-proof valve on the cover plate 10.

[0186] This prevents the manifold from clogging the explosion-proof valve, ensuring that in the event of thermal runaway of the battery, the gas and heat generated by thermal runaway can be smoothly discharged to the outside through the explosion-proof valve.

[0187] According to an embodiment of the fourth aspect of this application, the battery includes the cover assembly described above.

[0188] According to the battery of the present application embodiment, a thinning structure 41 is provided at the bending portion 4, which can reduce the bending difficulty of the bending portion 4, make the first connecting portion 1 easy to bend relative to the second connecting portion 2, make the third connecting portion 3 easy to bend relative to the second connecting portion 2, and help improve the bending effect, reduce the space occupied by the current collector after bending, and thus help reduce the overall size of the battery.

[0189] According to an embodiment of the fifth aspect of this application, the energy storage device includes the battery described above.

[0190] According to the energy storage device of the present application embodiment, a thinning structure 41 is provided at the bending portion 4, which can reduce the bending difficulty of the bending portion 4, making the first connecting portion 1 easier to bend relative to the second connecting portion 2, making the third connecting portion 3 easier to bend relative to the second connecting portion 2, and improving the bending effect, reducing the space occupied by the current collector after bending, which is beneficial to reducing the overall size of the battery, and thus beneficial to reducing the size of the energy storage device.

[0191] It should be noted that energy storage devices can include energy storage power supplies, medical devices, smart cities, etc. It is important to note that the above are merely illustrative examples of energy storage devices and do not impose any specific limitations on them.

[0192] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A collector disk, characterized in that, It includes a first connecting part, a first bending part, a second connecting part, a second bending part and a third connecting part connected in sequence. The first connecting part is used to connect to the battery terminal and the third connecting part is used to connect to the electrode tab. The first connecting portion is bent relative to the second connecting portion, the third connecting portion is bent relative to the second connecting portion, and the second connecting portion is located between the first connecting portion and the second connecting portion; At least one of the first bend and the second bend has a thinning structure.

2. The collector disk according to claim 1, characterized in that, The first connecting portion and the second connecting portion are disposed opposite to each other, and the thinning structure includes a first thinning structure, which is formed on the side of the first bending portion facing the first connecting portion and / or the second connecting portion.

3. The collector disk according to claim 2, characterized in that, The second connecting portion is disposed opposite to the third connecting portion, and the thinning structure includes a second thinning structure, which is formed on the side of the second bending portion facing the second connecting portion and / or the third connecting portion.

4. The collector disk according to claim 3, characterized in that, The orientation of the slot in the first thinning structure is opposite to the orientation of the slot in the second thinning structure; and / or, The bending directions of the first connecting portion and the third connecting portion are opposite. The first thinning structure is disposed on the inner side of the first bending portion, and the second thinning structure is disposed on the inner side of the second bending portion.

5. The collector disk according to any one of claims 1 to 4, characterized in that, The thinning structure includes a thinning groove, the groove wall of which includes a first wall surface, a second wall surface, and a third wall surface connected in sequence. The first wall surface and the third wall surface are planar, and the second wall surface is an arc-shaped surface.

6. The collector disk according to claim 5, characterized in that, The radius of the arc-shaped surface is r, where 0.05mm ≤ r ≤ 5mm.

7. A collector disk, characterized in that, The current collector is laid flat and includes a first connecting part, a second connecting part and a third connecting part connected in sequence. The first connecting part can be bent relative to the second connecting part, and the third connecting part can be bent relative to the second connecting part. The first connecting part is used to connect to the battery terminal, and the third connecting part is used to connect to the tab. The collector plate also includes a bending portion, which has a thinning structure. The bending portion connects the first connecting portion and the second connecting portion, and / or the bending portion connects the second connecting portion and the third connecting portion.

8. The collector disk according to claim 7, characterized in that, Both ends of the thinning structure extend along the axis of the bent portion; and / or, The thinning structure extends to the edge of the bend.

9. The collector disk according to claim 7, characterized in that, The thickness of the first connecting portion is h1, the thickness of the second connecting portion is h2, and the thickness of the third connecting portion is h3, wherein... h1≥h3; and / or, h2≥h3.

10. The collector disk according to any one of claims 7 to 9, characterized in that, The bending portion includes a first bending portion and a second bending portion, the first bending portion connects the first connecting portion and the second connecting portion, and the second bending portion connects the second connecting portion and the third connecting portion; The thinning structure includes a first thinning structure and a second thinning structure, wherein the first thinning structure is formed in the first bending portion and the second thinning structure is formed in the second bending portion.

11. The collector disk according to claim 10, characterized in that, The collector plate also includes a connecting block that connects the third connecting part and the second connecting part. At least a portion of the connecting block is stacked on the second connecting part, and the connecting block and the first thinning structure are located on the same side of the second connecting part.

12. The collector disk according to claim 11, characterized in that, The third connecting portion, the second bending portion, and the connecting block are integrally formed; and / or, The second bending portion is located between the third connecting portion and the connecting block.

13. The collector disk according to any one of claims 10 to 12, characterized in that, A second notch is formed on the outer side of the second bend.

14. The collector disk according to any one of claims 10 to 12, characterized in that, The thickness of the first connecting portion is h1, the thickness of the second connecting portion is h2, the thickness of the first bending portion is h4, and the thickness of the second bending portion is h5. h1≥h4; and / or, h2≥h4; and / or, h1≥h5; and / or, h2≥h5.

15. The collector disk according to claim 14, characterized in that, 0.2h1≤h4≤0.9h1; and / or, 0.2h² ≤ h⁴ ≤ 0.9h²; and / or, 0.2h1≤h5≤0.9h1; and / or, 0.2h2≤h5≤0.9h2.

16. A cover plate assembly, characterized in that, Includes the collector disk as described in any one of claims 1 to 15.

17. A battery, characterized in that, Includes the cover plate assembly as described in claim 16.

18. An energy storage device, characterized in that, Includes the battery as described in claim 17.

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