A current collecting plate, a single battery, a battery assembly, and an electric device

Abstract

The embodiment of the application provides a current collecting plate, a single battery, a battery assembly and an electric device, which comprise a body; a connecting sheet comprising a plurality of bending parts and connecting parts which are alternately arranged and connected in sequence, the plurality of connecting parts are arranged in layers with the body, the connecting part close to the body is a first connecting part, the bending part connected with the body is a first bending part, and one end of the first bending part away from the body is connected with the first connecting part; and at least one protruding part arranged between the body and the first connecting part and connected with the body and the first connecting part respectively, and / or arranged between two adjacent connecting parts and connected with the two connecting parts respectively; wherein the protruding part and the body are an integrated structure, and / or the protruding part and one of the two adjacent connecting parts are an integrated structure. Since the protruding part can play a supporting and buffering role, the bending part is prevented from being compressed too much, thereby greatly reducing the risk of compression fracture of the bending part, and the safety and reliability of the battery in use are improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a current collector, a single cell, a battery module, and an electrical device. Background Technology

[0002] The current collector is an important component of the battery. It is usually bent and assembled inside the battery casing. By electrically connecting the two ends of the current collector to the battery core and the top cover respectively, reliable power output can be achieved.

[0003] However, under high-frequency vibration conditions of the battery, there is a risk of crushing and breakage at the bending point of the current collector, which affects the safety and reliability of the battery. Utility Model Content

[0004] This application aims to provide a current collector, a single cell, a battery module, and an electrical device to solve the problem that the current collector has the risk of crushing and breaking at the bending point, which affects the safety and reliability of battery use.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] Firstly, this application discloses a data collection disk, comprising:

[0007] ontology;

[0008] A connecting piece, the connecting piece including a plurality of alternating and sequentially connected bending portions and connecting portions, the plurality of connecting portions being stacked with the body, the connecting portion closer to the body being a first connecting portion, the bending portion connecting to the body being a first bending portion, and the end of the first bending portion away from the body being connected to the first connecting portion.

[0009] And at least one protrusion, wherein at least one of the protrusions is disposed between the body and the first connecting portion and is respectively connected to the body and the first connecting portion, and / or, at least one of the protrusions is disposed between two adjacent connecting portions and is respectively connected to the two connecting portions;

[0010] Wherein, the protrusion and the body are integrally formed, and / or, the protrusion and one of the two adjacent connecting parts are integrally formed.

[0011] Optionally, the protrusion disposed between the body and the first connecting portion is a first protrusion;

[0012] The first protrusion protrudes from at least a portion of the body toward the first connecting portion and abuts against the first connecting portion;

[0013] And / or, the first protrusion protrudes from at least a portion of the first connecting portion toward the body and abuts against the body.

[0014] Optionally, the collector plate further includes a first insulating member disposed between the first protrusion and the first connecting portion or the body.

[0015] Optionally, the protrusion disposed between two adjacent connecting portions is a second protrusion;

[0016] The second protrusion is formed by at least a portion of one of the connecting portions protruding toward and abutting against the other connecting portion.

[0017] Optionally, the collector plate further includes a second insulating member disposed between the second protrusion and the corresponding connecting portion.

[0018] Optionally, the width direction of the connecting piece is a first direction, and multiple protrusions are provided, with all of the multiple protrusions extending along the first direction.

[0019] Optionally, the protrusion extends to both ends of the body or the connecting portion along the first direction.

[0020] Optionally, the length direction of the connecting piece is the second direction, and multiple protrusions are provided, with all of the multiple protrusions extending along the second direction.

[0021] Optionally, the bent portion is arc-shaped and has a radius of curvature r;

[0022] Multiple connecting portions are stacked with the body along a third direction, and the protrusion has a first height h in the third direction, satisfying: 4r / 3≤h≤2r, where h and r are measured in the same unit.

[0023] Optionally, the collector plate further includes a stress-absorbing structure, which is at least disposed in the bending portion and is used to absorb the stress generated in the bending portion during the bending process.

[0024] Optionally, the bent portion has two creases extending along a first direction;

[0025] The stress-absorbing structure includes a first stress-absorbing hole, which is disposed between the two creases;

[0026] And / or, the stress-absorbing structure further includes a second stress-absorbing hole, which is disposed on the body or the connecting portion, and at least a portion of the second stress-absorbing hole extends to the bending portion so that the crease passes through the corresponding second stress-absorbing hole.

[0027] Optionally, a plurality of first stress-absorbing holes are provided, and the plurality of first stress-absorbing holes are spaced apart along the first direction;

[0028] And / or, a plurality of the second stress-absorbing holes are provided, and the plurality of the second stress-absorbing holes are spaced apart along the first direction.

[0029] Optionally, the orifice shape of the first stress-absorbing hole is a regular hexagon or a circle;

[0030] And / or, the orifice shape of the second stress-absorbing hole is a regular hexagon or a circle.

[0031] Optionally, the bent portion is arc-shaped and has a radius of curvature r;

[0032] The maximum orifice size of the first stress-absorbing hole is a, which satisfies a≤2r;

[0033] And / or, the maximum orifice size of the second stress-absorbing hole is b, which satisfies b≤2r, and a, b, and r are all measured in the same unit.

[0034] Secondly, this application also discloses a single-cell battery, including the aforementioned current collector.

[0035] Thirdly, this application also discloses a battery assembly, including the aforementioned single battery cell.

[0036] Fourthly, this application also discloses an electrical device, including the aforementioned single battery cell and / or battery assembly.

[0037] In this embodiment, at least one protrusion is provided, positioned between the body and the first connecting portion and connected to both, and / or positioned between two adjacent connecting portions and connected to both. This allows the protrusion to provide support and cushioning under high-frequency battery vibration conditions, preventing over-compression of the bent portion (i.e., the first bent portion between the body and the first connecting portion, and / or other bent portions between two adjacent connecting portions). This significantly reduces the risk of the bent portion breaking under pressure, improving the safety and reliability of the battery. Furthermore, since the protrusion is integrally formed with the body, and / or integrally formed with one of the two adjacent connecting portions, the production process of the current collector is simplified, reducing production costs and increasing efficiency.

[0038] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0039] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0040] Figure 1 This is a schematic diagram of the unfolded structure of the collector disk provided in Embodiment 1 of this application;

[0041] Figure 2 This is one of the structural schematic diagrams of the collector disk provided in Embodiment 1 of this application;

[0042] Figure 3 This is the second schematic diagram of the collector disk provided in Embodiment 1 of this application;

[0043] Figure 4 This is a schematic diagram of the unfolded structure of the collector disk provided in Embodiment 2 of this application;

[0044] Figure 5 yes Figure 4 A magnified view of a portion of position A in the middle;

[0045] Figure 6 This is one of the structural schematic diagrams of the collector disk provided in Embodiment 2 of this application;

[0046] Figure 7 yes Figure 6 A magnified view of a portion of position B in the middle;

[0047] Figure 8 This is the second schematic diagram of the structure of the collector disk provided in Embodiment 2 of this application;

[0048] Figure 9 yes Figure 8 A magnified view of the area at position C in the middle;

[0049] Figure 10 This is a schematic diagram of the unfolded structure of the collector disk provided in Embodiment 3 of this application;

[0050] Figure 11 This is one of the structural schematic diagrams of the collector disk provided in Embodiment 3 of this application;

[0051] Figure 12 This is the second schematic diagram of the collector disk provided in Embodiment 3 of this application;

[0052] Figure 13 This is a schematic diagram of the unfolded structure of the collector disk provided in Embodiment 4 of this application;

[0053] Figure 14 This is one of the structural schematic diagrams of the collector disk provided in Embodiment 4 of this application;

[0054] Figure 15 This is the second schematic diagram of the collector disk provided in Embodiment 4 of this application;

[0055] Figure 16 This is a partial structural schematic diagram of a single battery cell provided in an embodiment of this application.

[0056] Figure label:

[0057] 100. Single cell battery

[0058] 1. Collector plate; 11. Body; 12. Connecting piece; 121. Bending part; 1211. First bending part; 1212. Second bending part; 1213. Crease; 122. Connecting part; 1221. First connecting part; 1222. Second connecting part; 13. Protrusion; 131. First protrusion; 132. Second protrusion; 14. Stress absorption structure; 141. First stress absorption hole; 142. Second stress absorption hole.

[0059] 2. Cover plate assembly, 21. Cover plate, 22. Pole post,

[0060] 3. Core,

[0061] 4. Shell,

[0062] X. First direction, Y. Second direction, Z. Third direction. Detailed Implementation

[0063] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0064] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0065] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0066] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0067] This application provides a data collection disk, which will be described in detail below with reference to the accompanying drawings.

[0068] Reference Figure 1 This shows a schematic diagram of the unfolded structure of the collector disk provided in Embodiment 1 of this application, with reference to... Figures 2 to 3 The diagram shows a schematic of the structure of the collector disk provided in Embodiment 1 of this application. (Refer to...) Figure 4This shows a schematic diagram of the unfolded structure of the collector disk provided in Embodiment 2 of this application, with reference to... Figure 5 , showed Figure 4 A magnified view of the area at position A in the middle, refer to... Figure 6 and Figure 8 The diagram shows a schematic of the structure of the manifold provided in Embodiment 2 of this application. (Refer to...) Figure 7 and Figure 9 They respectively showed Figure 6 Position B in the middle and Figure 8 A magnified view of the area at position C, see reference. Figure 10 The schematic diagram of the unfolded structure of the collector disk provided in Embodiment 3 of this application is shown in the figure. Figures 11 to 12 The diagram shows a schematic of the structure of the collector disk provided in Embodiment 3 of this application. (Refer to...) Figure 13 The schematic diagram of the unfolded structure of the collector disk provided in Embodiment 4 of this application is shown in the figure. Figures 14 to 15 The diagram shows a schematic diagram of the collector disk provided in Embodiment 4 of this application.

[0069] It should be noted that, Figure 1 , Figure 4 , Figure 10 as well as Figure 13 The unfolded structure of the manifold 1 shown is the product form of the manifold 1 before bending, that is, during the processing of the manifold 1. Figure 2 , Figure 3 , Figure 6 , Figure 8 , Figure 11 , Figure 12 , Figure 14 as well as Figure 15 The structure of the collector plate 1 shown is the final product form of the collector plate 1 after bending.

[0070] like Figures 1 to 15 As shown, this application provides a manifold 1, including: a body 11; a connecting piece 12, the connecting piece 12 including a plurality of alternately arranged and sequentially connected bent portions 121 and connecting portions 122, the plurality of connecting portions 122 being stacked with the body 11, the connecting portion 122 near the body 11 being a first connecting portion 1221, the bent portion 121 connecting the body 11 being a first bent portion 1211, the end of the first bent portion 1211 facing away from the body 11 being connected to the first connecting portion 1221; and at least one protrusion 13, the at least one protrusion 13 being disposed between the body 11 and the first connecting portion 1221 and connected to the body 11 and the first connecting portion 1221 respectively, and / or, the at least one protrusion 13 being disposed between two adjacent connecting portions 122 and connected to the two connecting portions 122 respectively; wherein, the protrusion 13 and the body 11 are integrally formed, and / or, the protrusion 13 and one of the two adjacent connecting portions 122 are integrally formed.

[0071] In this embodiment, at least one protrusion 13 is provided, which is disposed between the body 11 and the first connecting portion 1221 and connected to the body 11 and the first connecting portion 1221 respectively, and / or is disposed between two adjacent connecting portions 122 and connected to both connecting portions 122 respectively. In this way, under the high-frequency vibration condition of the battery, the protrusion 13 can play a supporting and buffering role, thereby preventing the bent portion 121 (i.e., the first bent portion 1211 located between the body 11 and the first connecting portion 1221, and / or other bent portions 121 between two adjacent connecting portions 122) from being over-compressed, thereby greatly reducing the risk of the bent portion 121 being crushed and broken, which is beneficial to improving the safety and reliability of battery use. Furthermore, since the protrusion 13 and the body 11 are integrally formed, and / or the protrusion 13 and one of the two adjacent connecting parts 122 are integrally formed, the production process of the collector plate 1 can be simplified, thereby reducing the production cost of the collector plate 1 and improving production efficiency.

[0072] It should be noted that the embodiments of this application do not limit the integral forming method of the protrusion 13 and the body 11, and / or the protrusion 13 in one of the two adjacent connecting parts 122. Those skilled in the art can choose according to actual needs. In one embodiment, the protrusion 13 and the body 11, and / or the protrusion 13 in one of the two adjacent connecting parts 122 can be integrally formed by stamping. The connecting piece 12 is usually a sheet structure. In the figures of this application, the first direction X refers to the width direction of the connecting piece 12, the second direction Y refers to the length direction of the connecting piece 12, and the third direction Z refers to the thickness direction of the connecting piece 12. The first direction X, the second direction Y, and the third direction Z intersect each other. The first direction X, the second direction Y, and the third direction Z can be perpendicular to each other. In the embodiments of this application, "multiple connecting parts 122 and the body 11 are stacked" means that multiple connecting parts 122 and the body 11 are stacked in the thickness direction of the connecting piece 12, that is, in the third direction Z.

[0073] Furthermore, the connecting portion 122 located on the side of the first connecting portion 1221 away from the main body 11 is the second connecting portion 1222. At least one second connecting portion 1222 is provided. In this embodiment, the specific number of second connecting portions 1222 is not limited, and those skilled in the art can adjust it according to actual needs. Based on this, in this embodiment, "two adjacent connecting portions 122" includes the following two cases: (1) the first connecting portion 1221 and the second connecting portion 1222 are arranged adjacently; (2) two second connecting portions 1222 are arranged adjacently.

[0074] like Figure 3 , Figure 8 , Figure 12 as well as Figure 15 As shown, in some optional embodiments of this application, the protrusion 13 disposed between the body 11 and the first connecting portion 1221 is a first protrusion 131; the first protrusion 131 protrudes from at least a portion of the body 11 toward the direction close to the first connecting portion 1221 and abuts against the first connecting portion 1221; and / or, the first protrusion 131 protrudes from at least a portion of the first connecting portion 1221 toward the direction close to the body 11 and abuts against the body 11.

[0075] In this embodiment, taking the first protrusion 131 formed by at least a portion of the body 11 protruding towards the first connecting portion 1221 as an example, the first protrusion 131 abuts against the first connecting portion 1221. In this way, on the one hand, the first protrusion 131 can improve the structural strength of the body 11, thereby enhancing the deformation resistance of the body 11 and the current collector 1 under vibration conditions. This reduces the risk of short circuits or connection failures caused by deformation, thus improving the safety and reliability of the battery. On the other hand, the first protrusion 131 can support and buffer the first connecting portion 1221, reducing the amount of compressive deformation of the first bent portion 1211 under vibration conditions. This significantly reduces the risk of crushing and breakage of the first bent portion 1211 due to overcompression, thereby improving the structural durability of the current collector 1 and further enhancing the safety and reliability of the battery. Similarly, the first protrusion 131 formed by at least a portion of the first connecting portion 1221 protruding towards the body 11 is described in the same way, and will not be elaborated further here.

[0076] Furthermore, since the first protrusion 131 can be disposed on the body 11, on the first connecting portion 1221, or simultaneously on both the body 11 and the first connecting portion 1221, the placement of the first protrusion 131 is flexible and diverse, thus adapting to different application scenarios and improving the versatility of the collector plate 1. It should be noted that this application embodiment does not limit the number of first protrusions 131; those skilled in the art can adjust them according to actual needs. For example, one, two, three, or other numbers of first protrusions 131 can be provided.

[0077] Furthermore, the first protrusion 131 can be in line contact or surface contact with the body 11 or the first connecting portion 1221. It is understood that when the first protrusion 131 is in surface contact with the body 11 or the first connecting portion 1221, the contact area between the two can be increased, which is beneficial to further improving the support reliability of the first protrusion 131.

[0078] In some optional embodiments of this application, the collector 1 further includes a first insulating member disposed between the first protrusion 131 and the first connecting portion 1221 or the body 11.

[0079] Generally, both the body 11 and the connecting piece 12 are made of metal. By providing a first insulating member between the first protrusion 131 and the first connecting part 1221 or the body 11, reliable isolation between the first protrusion 131 and the first connecting part 1221 or the body 11 can be achieved, thereby reducing or even avoiding the arcing effect that may occur at the contact point, which is conducive to further improving the safety and reliability of battery use.

[0080] It should be noted that the material of the first insulating member in this application embodiment includes, but is not limited to, polypropylene (PP), polyethylene terephthalate (PET), or other materials with good insulating properties. Furthermore, this application embodiment does not limit the connection method between the first insulating member and the first protrusion 131, or between the first insulating member and the first connecting portion 1221 or the body 11; those skilled in the art can adjust it according to actual needs. In one embodiment, the first insulating member and the first protrusion 131, and / or the first insulating member and the first connecting portion 1221 or the body 11 are connected by an adhesive bonding method. Specifically, an adhesive is provided on the side of the first insulating member near the first protrusion 131 and / or on the side near the body 11 or the first connecting part 1221. By bonding the first insulating member to the first protrusion 131 and / or bonding the adhesive member to the body 11 or the first connecting part 1221, a reliable connection between the first insulating member and the first protrusion 131, and / or between the first insulating member and the first connecting part 1221 or the body 11 can be achieved.

[0081] like Figure 3 , Figure 8 , Figure 12 as well as Figure 15 As shown, in some optional embodiments of this application, the protrusion 13 disposed between two adjacent connecting portions 122 is a second protrusion 132; the second protrusion 132 protrudes from at least a portion of one of the connecting portions 122 toward the other connecting portion 122 and abuts against it.

[0082] Specifically, for the adjacent first connecting portion 1221 and second connecting portion 1222, the second protrusion 132 may be a protrusion of at least a portion of the first connecting portion 1221 toward the second connecting portion 1222 and abut against the second connecting portion 1222; or it may be a protrusion of at least a portion of the second connecting portion 1222 toward the first connecting portion 1221 and abut against the first connecting portion 1221. For two adjacent second connecting portions 1222, the first protrusion 131 may be a protrusion of at least a portion of one of the second connecting portions 1222 toward the other second connecting portion 1222 and abut against it. The bend 121 located between two adjacent connecting portions 122, that is, between the adjacent first connecting portion 1221 and second connecting portion 1222, or between two adjacent second connecting portions 1222, is called the second bend 1212.

[0083] In this embodiment, taking the formation of a second protrusion 132 by at least a portion of the first connecting portion 1221 protruding towards the second connecting portion 1222 as an example, the second protrusion 132 abuts against the second connecting portion 1222. In this way, on the one hand, the second protrusion 132 can enhance the structural strength of the first connecting portion 1221, thereby improving the deformation resistance of the connecting piece 12 and the current collector 1 under vibration conditions. This reduces the risk of short circuits or connection failures caused by deformation, thus improving the safety and reliability of the battery. On the other hand, the second protrusion 132 can provide support and buffer for the second connecting portion 1222, reducing the amount of compressive deformation of the second bent portion 1212 under vibration conditions. This significantly reduces the risk of crushing and breakage of the second bent portion 1212 due to over-compression, thereby improving the structural durability of the current collector 1 and further enhancing the safety and reliability of the battery. In addition, the second protrusion 132 formed by at least a portion of the second connecting portion 1222 protruding toward the direction close to the first connecting portion 1221, or the second protrusion 132 formed by at least a portion of one of the second connecting portions 1222 protruding toward the direction close to the other second connecting portion 1222, is similar and will not be described in detail here.

[0084] Furthermore, for the adjacent first connecting portion 1221 and second connecting portion 1222, the second protrusion 132 can be disposed on the first connecting portion 1221, or on the second connecting portion 1222, or simultaneously on both the first and second connecting portions 1222. For two adjacent second connecting portions 1222, the second protrusion 132 can be disposed on one of the second connecting portions 1222, or on the other, or simultaneously on both. In other words, the placement of the second protrusion 132 is flexible and diverse, thus adapting to different application scenarios and improving the versatility of the collector plate 1. It should be noted that the embodiments of this application do not limit the number of second protrusions 132; those skilled in the art can adjust them according to actual needs. For example, one, two, three, or other numbers of second protrusions 132 can be provided.

[0085] Furthermore, the second protrusion 132 can be in line contact or in surface contact with the first connecting portion 1221 or the second connecting portion 1222. It is understood that when the second protrusion 132 is in surface contact with the first connecting portion 1221 or the second connecting portion 1222, the contact area between the two can be increased, which is beneficial to further improving the support reliability of the second protrusion 132.

[0086] In some optional embodiments of this application, the collector 1 further includes a second insulating member disposed between the second protrusion 132 and the corresponding connecting portion 122. The connecting portion 122 can be either a first connecting portion 1221 or a second connecting portion 1222.

[0087] Generally, the connecting piece 12 is made of metal. By providing a second insulating member between the second protrusion 132 and the corresponding connecting part 122, reliable isolation between the second protrusion 132 and the corresponding connecting part 122 can be achieved, thereby reducing or even avoiding the arc effect that may occur at the contact position, which is conducive to further improving the safety and reliability of battery use.

[0088] It should be noted that the material of the second insulating member in this application embodiment includes, but is not limited to, polypropylene (PP), polyethylene terephthalate (PET), or other materials with good insulating properties. Furthermore, this application embodiment does not limit the connection method between the second insulating member and the second protrusion 132 or the corresponding connecting portion 122; those skilled in the art can adjust it according to actual needs. In one embodiment, the second insulating member is connected to the second protrusion 132, and / or the second insulating member is connected to the corresponding connecting portion 122 by an adhesive bonding method. Specifically, an adhesive is provided on the side of the second insulating member near the second protrusion 132, and / or on the side near the corresponding connecting portion 122. By bonding the adhesive to the second protrusion 132, and / or bonding the adhesive to the corresponding connecting portion 122, a reliable connection between the second insulating member and the second protrusion 132, and / or the second insulating member and the corresponding connecting portion 122, can be achieved.

[0089] like Figures 1 to 12 As shown, in some optional embodiments of this application, the width direction of the connecting piece 12 is the first direction X, and multiple protrusions 13 are provided, all of which extend along the first direction X. It is understood that "multiple protrusions 13" includes at least the following three cases: (1) only the first protrusion 131 is provided, and multiple first protrusions 131 are provided; (2) only the second protrusion 132 is provided, and multiple second protrusions 132 are provided; (3) both the first protrusion 131 and the second protrusion 132 are provided, and at least one of the first protrusion 131 and the second protrusion 132 is provided, wherein multiple means two or more.

[0090] In this embodiment, since multiple protrusions 13 extending along the first direction Y, i.e. the width direction of the connecting piece 12, are provided, they can not only provide support and buffer but also improve the structural strength of the connecting piece 12 in the width direction, thereby improving the structural durability of the connecting piece 12 and the collector plate 1 and thus improving the service life of the collector plate 1.

[0091] It should be noted that, taking the protrusion 13 disposed on the connecting portion 122 as an example, the protrusion 13 may be disposed only on a partial width of the connecting portion 122, or it may be disposed on the entire width of the connecting portion 122. This is not limited here, and those skilled in the art can adjust it according to actual needs. In one embodiment, the protrusion 13 extends to both ends of the body 11 or the connecting portion 122 along the first direction X, that is, the protrusion 13 is disposed on the entire width of the body 11 or the connecting portion 122. In this way, compared to partial placement, not only can the processing difficulty be reduced, which is beneficial to improving the production efficiency of the collector plate 1; but also the contact area between the protrusion 13 and the body 11 or the connecting portion 122 can be increased, thereby being able to withstand greater impact forces and further improving the support reliability of the protrusion 13. Understandably, when multiple protrusions 13 are provided, they can be arranged at even intervals and as close as possible to the bending portion 121. By arranging the protrusions 13 at even intervals, the force generated by vibration can be evenly distributed across the protrusions 13, resulting in more balanced stress and improved reliability of support and cushioning. Furthermore, placing the protrusions 13 as close as possible to the bending portion 121 enhances the support and cushioning effect, further reducing the risk of the bending portion 121 breaking under pressure.

[0092] like Figures 13 to 15 As shown, in some optional embodiments of this application, the length direction of the connecting piece 12 is the second direction Y, and multiple protrusions 13 are provided, all of which extend along the second direction Y. It is understood that "multiple protrusions 13" includes at least the following three cases: (1) only the first protrusion 131 is provided, and multiple first protrusions 131 are provided; (2) only the second protrusion 132 is provided, and multiple second protrusions 132 are provided; (3) both the first protrusion 131 and the second protrusion 132 are provided, and at least one of the first protrusion 131 and the second protrusion 132 is provided, wherein multiple means two or more.

[0093] In this embodiment, because multiple protrusions 13 extending along the second direction Y, i.e., the length direction of the connecting piece 12, are provided, they not only provide support and cushioning but also improve the structural strength of the connecting piece 12 along its length. This enhances the structural durability of the connecting piece 12 and the collector plate 1, thereby increasing the service life of the collector plate 1. It is understood that, to avoid the influence of the protrusions 13 on bending, the protrusions 13 and the bending portion 121 need to be spaced apart in the second direction Y.

[0094] It is understood that in some optional embodiments of this application, some of the multiple protrusions 13 may extend along the first direction X and the other part may extend along the second direction Y, thereby simultaneously improving the structural strength of the connecting piece 12 in both the width and length directions, thereby further improving the structural durability of the connecting piece 12 and the collector plate 1, which is beneficial to further improving the service life of the collector plate 1.

[0095] like Figure 9 As shown, in some optional embodiments of this application, the bent portion 121 is arc-shaped and has a radius of curvature r; multiple connecting portions 122 are stacked with the body 11 along the third direction Z, and the protrusion 13 has a first height h in the third direction Z, satisfying: 4r / 3≤h≤2r, where h and r are measured in the same unit (e.g., mm). The bent portion 121 has a full rounded corner transition, meaning that the cross-sectional shape of the protrusion 13 in the width direction of the connecting piece 12, i.e., the first direction X, is semi-circular.

[0096] In this embodiment of the application, by controlling the first height of the protrusion 13 within the range of 4r / 3≤h≤2r, not only can the protrusion 13 better play a supporting and buffering role, but the overall thickness of the current collector 1 can also be controlled within a suitable range so that the current collector 1 can be smoothly assembled with other components of the battery, such as the electrode core 3 and the top cover.

[0097] It should be noted that the embodiments of this application do not limit the specific values ​​of the radius of curvature r of the bent portion 121, the first height h of the protrusion 13 in the third direction Z, or the specific proportional relationship between the two. Those skilled in the art can adjust them according to actual needs. For example, the first height h of the protrusion 13 in the third direction Z can be 4r / 3, 5r / 3, 2r, or other values.

[0098] like Figures 4 to 15 As shown, in some optional embodiments of this application, the collector plate 1 further includes a stress absorbing structure 14, which is at least disposed in the bending portion 121 and is used to absorb the stress generated in the bending portion 121 during the bending process.

[0099] In this embodiment, since a stress-absorbing structure 14 is provided, by providing the stress-absorbing structure 14 at least in the bending portion 121, the stress generated in the bending portion 121 during the bending process can be absorbed, thereby significantly improving the bending fatigue fracture resistance of the connecting piece 12, which is beneficial to further improving the safety and reliability of battery use.

[0100] like Figures 4 to 7As shown, in some optional embodiments of this application, the bent portion 121 has two creases 1213 extending along the first direction X; the stress absorbing structure 14 includes a first stress absorbing hole 141 disposed between the two creases 1213.

[0101] Generally, the area between the two creases 1213 of the bending portion 121 is a high-stress zone. By providing a first stress-absorbing hole 141 between the two creases 1213, the hole wall of the first stress-absorbing hole 141 can deform during the bending process, thereby absorbing the stress and impact energy generated by bending. This significantly improves the bending fatigue fracture resistance of the connecting piece 12, which is beneficial to improving the safety and reliability of battery use. In addition, even if local cracks occur, the first stress-absorbing hole 141 can inhibit crack propagation, thereby further improving the bending fatigue fracture resistance of the connecting piece 12, which is beneficial to further improving the safety and reliability of battery use.

[0102] Furthermore, multiple first stress-absorbing holes 141 are provided, and these holes are spaced apart along the first direction X, i.e., the width direction of the connecting piece 12. This allows multiple stress-absorbing points to be formed along the extension direction of the bending portion 121, which not only homogenizes the stress distribution but also reduces local peak stress. In addition, by spaced out the multiple first stress-absorbing holes 141, the strength loss caused by the openings can be minimized, ensuring sufficient structural strength for the entire collector plate 1. It is understood that the multiple first stress-absorbing holes 141 spaced apart along the first direction X constitute a group. Those skilled in the art can provide one or more groups of first stress-absorbing holes 141 according to actual needs. When multiple groups of first stress-absorbing holes 141 are provided, they can be spaced apart along the second direction Y, and adjacent groups of first stress-absorbing holes 141 can be aligned or staggered.

[0103] It should be noted that the shape of the opening of the first stress-absorbing hole 141 is not limited in this application embodiment, and those skilled in the art can choose according to actual needs. In one embodiment, the opening shape of the first stress-absorbing hole 141 is a regular hexagon, a circle, or other regular shape. In this way, since the opening shape is regular, the hole wall can undergo uniform deformation during bending, thereby reducing or even avoiding the risk of cracks caused by local stress concentration, which is beneficial to further improving the bending fatigue fracture resistance of the connecting piece 12, and further improving the safety and reliability of battery use.

[0104] like Figures 4 to 7As shown, in some optional embodiments of this application, the stress-absorbing structure 14 further includes a second stress-absorbing hole 142, which is disposed on the body 11 or the connecting portion 122, and at least a portion of the second stress-absorbing hole 142 extends to the bending portion 121 so that the crease 1213 passes through the corresponding second stress-absorbing hole 142.

[0105] Generally, the stress is greatest at the crease 1213. By providing a second stress-absorbing hole 142 in the body 11 or the connecting portion 122, and at least a portion of the second stress-absorbing hole 142 extending to the bending portion 121, the crease 1213 passes through the corresponding second stress-absorbing hole 142. In this way, during bending, the hole wall of the second stress-absorbing hole 142 can deform, thereby absorbing the stress and impact energy generated at the crease 1213. This significantly improves the bending fatigue fracture resistance of the connecting piece 12, and enhances the safety and reliability of the battery. Furthermore, even if local cracks appear, the second stress-absorbing hole 142 can suppress crack propagation, further improving the bending fatigue fracture resistance of the connecting piece 12, and further enhancing the safety and reliability of the battery.

[0106] Furthermore, multiple second stress-absorbing holes 142 are provided, and these holes are spaced apart along the first direction X, i.e., the width direction of the connecting piece 12. This allows multiple stress-absorbing points to be formed on the body 11 or the connecting portion 122, which not only homogenizes the stress distribution but also reduces local peak stress. In addition, by spaced the multiple second stress-absorbing holes 142, the strength loss caused by the openings can be minimized, ensuring that the entire manifold 1 has sufficient structural strength. It is understood that a plurality of second stress-absorbing holes 142 spaced apart along the first direction X constitute a group. Those skilled in the art can set one or more groups of second stress-absorbing holes 142 according to actual needs. When multiple groups of second stress-absorbing holes 142 are set, the multiple groups of second stress-absorbing holes 142 can be set on opposite sides of the first stress-absorbing hole 141 along the second direction Y, and adjacent groups of second stress-absorbing holes 142 are spaced apart. Furthermore, adjacent second stress-absorbing holes 142 and first stress-absorbing holes 141 can be aligned or staggered, and two adjacent groups of second stress-absorbing holes 142 can be aligned or staggered.

[0107] It should be noted that the orifice shape of the second stress-absorbing hole 142 is not limited in this application embodiment, and those skilled in the art can select it according to actual needs. In one embodiment, the orifice shape of the second stress-absorbing hole 142 is a regular hexagon, a circle, or other regular shape. In this way, since the orifice shape is regular, the hole wall can undergo uniform deformation during bending, thereby reducing or even avoiding the risk of cracks caused by local stress concentration, which is beneficial to further improving the bending fatigue fracture resistance of the connecting piece 12, and further improving the safety and reliability of battery use.

[0108] In some optional embodiments of this application, the bending portion 121 is arc-shaped and has a radius of curvature r; the maximum orifice size of the first stress-absorbing hole 141 is a, satisfying a≤2r; and / or, the maximum orifice size of the second stress-absorbing hole 142 is b, satisfying b≤2r, where a, b, and r are all measured in the same unit (e.g., mm).

[0109] Generally speaking, taking the first stress-absorbing hole 141 as an example, as the maximum orifice size of the first stress-absorbing hole 141 increases, the deformation of the hole wall of the first stress-absorbing hole 141 increases, thereby improving the stress absorption effect. However, when the number of first stress-absorbing holes 141 remains unchanged, as the maximum orifice size of the first stress-absorbing hole 141 increases, the total opening area increases, resulting in a decrease in the overall structural strength of the connecting piece 12 and the collector plate 1. Based on this, by controlling the maximum orifice size a of the first stress-absorbing hole 141 within the range of a≤2r, both good stress absorption effect and high structural strength can be achieved. The same applies to the second stress-absorbing hole 142, which will not be elaborated here.

[0110] It should be noted that, taking the first stress-absorbing hole 141 as an example, the maximum orifice size of the first stress-absorbing hole 141 refers to the maximum value of the orifice size. Specifically, if the orifice shape of the first stress-absorbing hole 141 is a regular hexagon, the maximum orifice size is the diagonal size of the regular hexagon; if the orifice shape of the first stress-absorbing hole 141 is a circle, the maximum orifice size is the diameter of the circle, and so on. Examples will not be given here.

[0111] Example 1

[0112] like Figures 1 to 3As shown, the collector plate 1 includes a body 11 and a connecting piece 12. The connecting piece 12 includes two alternately arranged and sequentially connected bent portions 121 and connecting portions 122, and the two connecting portions 122 are stacked with the body 11 in the third direction Z. Among them, the connecting portion 122 closer to the body 11 is the first connecting portion 1221, and the bent portion 121 closer to the body 11 is the first bent portion 1211. The two ends of the first bent portion 1211 are connected to the first connecting portion 1221 and the body 11, respectively. The connecting portion 122 away from the body 11 is the second connecting portion 1222, and the bent portion 121 away from the body 11 is the second bent portion 1212. The two ends of the second bent portion 1212 are connected to the first connecting portion 1221 and the second connecting portion 1222, respectively.

[0113] Furthermore, at least a portion of the first connecting portion 1221 protrudes towards the body 11 to form a first protrusion 131, which abuts against the body 11. At least a portion of the second connecting portion 1222 protrudes towards the first connecting portion 1221 to form a second protrusion 132, which abuts against the first connecting portion 1221. Thus, under high-frequency vibration conditions of the battery, the first protrusion 131 can support and buffer the first connecting portion 1221, thereby preventing the first bent portion 1211 from being over-compressed; the second protrusion 132 can support and buffer the second connecting portion 1222, thereby preventing the second bent portion 1212 from being over-compressed. This significantly reduces the risk of crushing and breakage of the first bent portion 1211 and the second bent portion 1212, improving the safety and reliability of the battery.

[0114] Example 2

[0115] like Figures 4 to 9 As shown, the difference between this embodiment and Embodiment 1 is that the current collector 1 further includes a stress absorption structure 14. There are two stress absorption structures 14, one of which is at least located in the first bending portion 1211 and the other is at least located in the second bending portion 1212.

[0116] Taking the stress-absorbing structure 14 disposed in the first bending portion 1211 as an example, the stress-absorbing structure 14 includes a set of first stress-absorbing holes 141 and two sets of second stress-absorbing holes 142. The first stress-absorbing holes 141 are disposed between the two creases 1213 of the first bending portion 1211. One set of second stress-absorbing holes 142 is disposed in the body 11 and extends at least partially to the first bending portion 1211 so that the corresponding creases 1213 pass through the second stress-absorbing holes 142. The other set of second stress-absorbing holes 142 is disposed in the first connecting portion 1221 and extends at least partially to the first bending portion 1211 so that the corresponding creases 1213 pass through the second stress-absorbing holes 142. In this way, due to the provision of the first stress-absorbing holes 141 and the second stress-absorbing holes 142, the deformation of the hole walls of the first stress-absorbing holes 141 and the second stress-absorbing holes 142 can effectively absorb the stress and impact energy generated by bending, thereby significantly improving the bending fatigue fracture resistance of the connecting piece 12, which is beneficial to improving the safety and reliability of battery use.

[0117] Example 3

[0118] like Figures 10 to 12 As shown, the difference between this embodiment and embodiment two is that: there are two first protrusions 131, and both first protrusions 131 are formed by at least a portion of the first connecting portion 1221 protruding towards the direction close to the body 11. The first protrusions 131 extend along the first direction X, and the two first protrusions 131 are spaced apart in the second direction Y.

[0119] Two second protrusions 132 are provided. One second protrusion 132 is formed by at least a portion of the first connecting portion 1221 protruding towards the direction close to the second connecting portion 1222, and the other second protrusion 132 is formed by at least a portion of the second connecting portion 1222 protruding towards the direction close to the first connecting portion 1221. The second protrusions 132 extend along the first direction X, and the two second protrusions 132 are spaced apart in the second direction Y. By providing two first protrusions 131 and two second protrusions 132, the reliability of support and buffering can be improved. In addition, since both the first protrusions 131 and the second protrusions 132 extend along the first direction X, the structural strength in the width direction of the connecting piece 12 can be improved, thereby improving the structural durability of the connecting piece 12 and the collector plate 1, which is beneficial to improving the service life of the collector plate 1.

[0120] Example 3

[0121] like Figures 13 to 15As shown, the difference between this embodiment and embodiment two is that: there are two first protrusions 131, and both first protrusions 131 are formed by at least a portion of the first connecting portion 1221 protruding toward the direction close to the body 11, and the first protrusions 131 extend along the second direction Y.

[0122] Three second protrusions 132 are provided, each of which is formed by at least a portion of the first connecting portion 1221 protruding towards the second connecting portion 1222, and the second protrusions 132 extend along the second direction Y. The two first protrusions 131 and the three second protrusions 132 are alternately spaced in the first direction X. By providing the alternately spaced two first protrusions 131 and three second protrusions 132, the reliability of support and buffering, as well as the stability of the support, can be improved. Furthermore, since the first protrusions 131 and the second protrusions 132 both extend along the second direction Y, the structural strength in the length direction of the connecting piece 12 can be improved, thereby increasing the structural durability of the connecting piece 12 and the collector plate 1, and thus improving the service life of the collector plate 1.

[0123] In summary, the current collector provided in this application has at least the following advantages:

[0124] In this embodiment, multiple protrusions are provided. At least one protrusion is positioned between the body and the first connecting part and connected to both, and / or at least one protrusion is positioned between two adjacent connecting parts and connected to both. Thus, under high-frequency vibration conditions of the battery, the protrusions can provide support and cushioning, preventing the bent portion (i.e., the first bent portion located between the body and the first connecting part, and / or other bent portions between two adjacent connecting parts) from being overcompressed. This significantly reduces the risk of the bent portion breaking under pressure, improving the safety and reliability of the battery. Furthermore, since the protrusions are integrally formed with the body or connecting part, the production process of the current collector is simplified, thereby reducing the production cost and improving production efficiency.

[0125] Reference Figure 16 The diagram shows a partial structural schematic of a single battery cell provided in an embodiment of this application, as shown below. Figure 16 As shown, this application embodiment also provides a single battery cell 100, including the current collector 1 of any of the above embodiments. Thus, since the current collector 1 is provided with multiple protrusions 13, the protrusions 13 can play a supporting and buffering role, thereby preventing the bent portion 121 from being over-compressed, greatly reducing the risk of the bent portion 121 being crushed and broken, and thus improving the safety and reliability of the single battery cell 100.

[0126] It should be noted that in this embodiment, the structure of the collector disk 1 is the same as that of the collector disk 1 in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0127] In practical applications, the single-cell battery 100 also includes a housing 4, an electrode core 3, and a cover plate assembly 2. The housing 4 has an open receiving cavity, the electrode core 3 is disposed in the receiving cavity, and the cover plate assembly 2 includes a cover plate 21 and an electrode post 22 passing through the cover plate, with the cover plate 21 covering the opening. A current collector 1 is disposed between the electrode core 3 and the cover plate 21 and is electrically connected to both the electrode core 3 and the electrode post 22. Specifically, the electrode core 3 includes a tab, which is electrically connected to the body 11 of the current collector 1, and the electrode post 22 is electrically connected to the second connecting part 1222 of the current collector 1, thereby enabling reliable power output. It should be noted that the electrode post 22 can be made of metals such as copper, aluminum, or stainless steel, and is typically manufactured using a cold forging process. The current collector 1 can be made of metals such as aluminum alloy, nickel-plated copper, or pure copper, and is typically manufactured using a stamping process. The electrode core 3 is typically manufactured using a winding process. The shell 4 can be made of cold-rolled low carbon steel (SPCC, Steel Plate Cold rolled Commercial) or aluminum alloy, and can usually be manufactured by extrusion, stamping or roll welding forming processes.

[0128] This application also provides a battery assembly, including the single cell 100 of any of the above embodiments. Thus, since the current collector 1 of the single cell 100 is provided with multiple protrusions 13, the bending portion 121 can be prevented from being over-compressed, greatly reducing the risk of the bending portion 121 being crushed and broken, thereby improving the safety and reliability of the single cell 100 and the battery assembly.

[0129] It should be noted that in this embodiment, the structure of the single cell 100 is the same as that of the single cell 100 in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0130] This application also provides an electrical device, including a single battery cell 100 and / or a battery assembly according to any of the above embodiments. Thus, because the current collector 1 of the single battery cell 100 is provided with multiple protrusions 13, the bending portion 121 can be prevented from being over-compressed, greatly reducing the risk of the bending portion 121 being crushed and broken. This improves the safety and reliability of the single battery cell 100 and the battery assembly, and further enhances the safety of the electrical device.

[0131] It should be noted that in the embodiments of this application, the structure of the single battery 100 or battery assembly is the same as that of the single battery 100 or battery assembly in any of the above embodiments, and its beneficial effects are also similar, so it will not be described again here. In addition, the electrical equipment in the embodiments of this application includes, but is not limited to, vehicles, ferries, computers, aircraft, energy storage devices or other equipment, and is not limited here. Those skilled in the art can make adjustments according to actual needs.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0133] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A collector disk, characterized in that, include: ontology; A connecting piece, the connecting piece including a plurality of alternating and sequentially connected bending portions and connecting portions, the plurality of connecting portions being stacked with the body, the connecting portion closer to the body being a first connecting portion, the bending portion connecting to the body being a first bending portion, and the end of the first bending portion away from the body being connected to the first connecting portion. And at least one protrusion, wherein at least one of the protrusions is disposed between the body and the first connecting portion and is respectively connected to the body and the first connecting portion, and / or, at least one of the protrusions is disposed between two adjacent connecting portions and is respectively connected to the two connecting portions; Wherein, the protrusion and the body are integrally formed, and / or, the protrusion and one of the two adjacent connecting parts are integrally formed.

2. The collector disk according to claim 1, characterized in that, The protrusion disposed between the body and the first connecting portion is the first protrusion; The first protrusion protrudes from at least a portion of the body toward the first connecting portion and abuts against the first connecting portion; And / or, the first protrusion protrudes from at least a portion of the first connecting portion toward the body and abuts against the body.

3. The collector disk according to claim 2, characterized in that, The collector also includes a first insulating member, which is disposed between the first protrusion and the first connecting portion or the body.

4. The collector disk according to claim 1, characterized in that, The protrusion disposed between two adjacent connecting portions is the second protrusion. The second protrusion is formed by at least a portion of one of the connecting portions protruding toward and abutting against the other connecting portion.

5. The collector disk according to claim 4, characterized in that, The collector plate also includes a second insulating member, which is disposed between the second protrusion and the corresponding connecting portion.

6. The collector disk according to claim 1, characterized in that, The width direction of the connecting piece is the first direction, and multiple protrusions are provided, with all of the protrusions extending along the first direction.

7. The collector disk according to claim 6, characterized in that, The protrusion extends to both ends of the body or the connecting portion along the first direction.

8. The collector disk according to claim 1, characterized in that, The length direction of the connecting piece is the second direction, and multiple protrusions are provided, with all of the protrusions extending along the second direction.

9. The collector disk according to claim 1, characterized in that, The bent portion is arc-shaped and has a radius of curvature r. Multiple connecting portions are stacked with the body along a third direction, and the protrusion has a first height h in the third direction, satisfying: 4r / 3≤h≤2r, where h and r are measured in the same unit.

10. The collector disk according to any one of claims 1-9, characterized in that, The collector plate also includes a stress-absorbing structure, which is at least disposed in the bending portion and is used to absorb the stress generated in the bending portion during the bending process.

11. The collector disk according to claim 10, characterized in that, The bent portion has two creases extending along a first direction; The stress-absorbing structure includes a first stress-absorbing hole, which is disposed between the two creases; And / or, the stress-absorbing structure further includes a second stress-absorbing hole, which is disposed on the body or the connecting portion, and at least a portion of the second stress-absorbing hole extends to the bending portion so that the crease passes through the corresponding second stress-absorbing hole.

12. The collector disk according to claim 11, characterized in that, Multiple first stress-absorbing holes are provided, and the multiple first stress-absorbing holes are spaced apart along the first direction; And / or, a plurality of the second stress-absorbing holes are provided, and the plurality of the second stress-absorbing holes are spaced apart along the first direction.

13. The collector disk according to claim 11, characterized in that, The orifice shape of the first stress-absorbing hole is a regular hexagon or a circle; And / or, the orifice shape of the second stress-absorbing hole is a regular hexagon or a circle.

14. The collector disk according to claim 11, characterized in that, The bent portion is arc-shaped and has a radius of curvature r. The maximum orifice size of the first stress-absorbing hole is a, which satisfies a≤2r; And / or, the maximum orifice size of the second stress-absorbing hole is b, which satisfies b≤2r, and a, b, and r are all measured in the same unit.

15. A single-cell battery, characterized in that, Includes the collector disk as described in any one of claims 1-14.

16. A battery assembly, characterized in that, Includes the single-cell battery as described in claim 15.

17. An electrical appliance, characterized in that, Includes the single cell as described in claim 15, and / or the battery assembly as described in claim 16.

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