Current collection component, energy storage device and electrical equipment

Abstract

The present application discloses a current collecting component, an energy storage device and an electrical equipment, relating to the technical field of batteries. The current collecting component includes: a first connecting member, including a first connecting portion, a second connecting portion and a conducting portion; the conducting portion has at least one first reinforcing rib and at least one second reinforcing rib, the first reinforcing rib protrudes from a first surface of the conducting portion, and the second reinforcing rib protrudes from a second surface of the conducting portion; a second connecting member, the second connecting portion is mechanically connected to a surface of the second connecting member, and after the second connecting portion rotates, the second connecting member is located on a side of the second connecting portion away from the conducting portion. In the embodiment of the present application, the first reinforcing rib and the second reinforcing rib can achieve positioning when the first connecting portion and the second connecting portion rotate relative to the conducting portion, so as to improve the bending yield rate of the current collecting component, and after the first connecting portion and the second connecting portion rotate, the first reinforcing rib and the second reinforcing rib can respectively support the first connecting portion and the second connecting portion, avoiding the brittle fracture of the current collecting component.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a current collector assembly, an energy storage device, and an electrical equipment. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] A battery cell includes a housing, an electrode assembly located inside the housing, and an end cap assembly covering the opening of the housing. The electrode assembly is connected to an electrode terminal on the end cap assembly through a current collector assembly to export the electrical energy of the electrode assembly through the electrode terminal. In the prior art, during the production process of the battery cell, when connecting the electrode assembly and the electrode terminal through the current collector assembly, there is still a relatively high safety hazard for the battery cell. Summary of the Invention

[0004] A main object of the present application is to provide a current collector assembly, an energy storage device, and an electrical equipment that can improve the bending yield rate and reduce the safety hazard of the battery cell.

[0005] To achieve the above application objectives, the present application adopts the following technical solutions:

[0006] According to one aspect of the present application, there is provided a current collector assembly, including:

[0007] A first connecting member, including a first connecting portion, a second connecting portion distributed along a first direction, and a conducting portion connected between the first connecting portion and the second connecting portion;

[0008] Wherein, the conducting portion has at least one first reinforcing rib extending from one end close to the first connecting portion in a direction away from the first connecting portion, and at least one second reinforcing rib extending from one end close to the second connecting portion in a direction away from the second connecting portion. The first reinforcing rib protrudes from a first surface of the conducting portion, and the first connecting portion can rotate to a first side where the first surface of the conducting portion is located. The second reinforcing rib protrudes from a second surface of the conducting portion, and the second connecting portion can rotate to a second side where the second surface of the conducting portion is located;

[0009] The first reinforcing rib and the second reinforcing rib are staggeredly distributed in a second direction, and the first reinforcing rib and the second reinforcing rib partially overlap in the second direction. The second direction is perpendicular to the first direction;

[0010] The second connecting member, the second connecting portion is mechanically connected to the surface of the second connecting member, and after the second connecting portion rotates to the second side of the conduction portion, the second connecting member is located on the side of the second connecting portion away from the conduction portion.

[0011] In the embodiments of the present application, based on the first reinforcing rib and the second reinforcing rib on the conduction portion, the structural strength of the conduction portion can be improved, and at the same time, the positioning during the rotation of the first connecting portion and the second connecting portion relative to the conduction portion can be realized, improving the bending yield rate of the current collecting assembly. Moreover, after the first connecting portion and the second connecting portion rotate, the first reinforcing rib and the second reinforcing rib can support the first connecting portion and the second connecting portion, avoiding the situation of brittle fracture due to too small an angle between the first connecting portion, the second connecting portion and the conduction portion. In addition, for the separately provided second connecting member, by designing the outer contour of the second connecting member, the situation that a notch is formed at the edge of the second connecting member after the current collecting assembly is bent can be avoided. In this way, when the second connecting member is connected to the tab of the electrode assembly, the situation that the tab is exposed outside the edge of the second connecting member can be effectively avoided, improving the connection yield rate between the current collecting assembly and the electrode assembly. Furthermore, by defining that the first reinforcing rib and the second reinforcing rib have an overlapping portion in the second direction, the structural stability of the conduction portion itself can be improved, avoiding the situation that the conduction portion itself is bent when the current collecting assembly is bent, and improving the bending yield rate of the current collecting assembly.

[0012] According to an embodiment of the present application, wherein the length of the overlapping portion of the first reinforcing rib and the second reinforcing rib in the first direction is greater than or equal to 0.5 mm.

[0013] In the embodiments of the present application, by defining the minimum length of the overlapping portion of the first reinforcing rib and the second reinforcing rib in the second direction in the first direction, the structural stability of the conduction portion itself (especially the position where the overlapping portion is located) can be further improved, so as to avoid the situation that the conduction portion tears at the position where the overlapping portion is located due to the limitation of the first reinforcing rib and the second reinforcing rib when the current collecting assembly is bent.

[0014] According to an embodiment of the present application, wherein the extending directions of the first reinforcing rib and the second reinforcing rib are both parallel to the first direction.

[0015] In the embodiments of the present application, by defining the extending directions of the first reinforcing rib and the second reinforcing rib, the situation of interference between the two when the first reinforcing rib and the second reinforcing rib are arranged on the conduction portion can be avoided, reducing the design difficulty of designing the conduction portion; it can also ensure the uniformity of the structural strength of the conduction portion in the second direction, avoiding the situation of tearing between the conduction portion and the first connecting portion and the second connecting portion.

[0016] According to an embodiment of the present application, wherein the conduction part has a plurality of the first reinforcing ribs and a plurality of the second reinforcing ribs;

[0017] The plurality of the first reinforcing ribs and the plurality of the second reinforcing ribs are both arranged along the second direction, and the first reinforcing ribs and the second reinforcing ribs are alternately arranged along the second direction.

[0018] In the embodiment of the present application, through the arrangement of the plurality of the first reinforcing ribs and the plurality of the second reinforcing ribs, and the alternating distribution between the first reinforcing ribs and the second reinforcing ribs, the structural strength of the overall area of the conduction part can be effectively guaranteed, and the situation of local tearing due to relatively weak local structural strength can be avoided; in addition, through the arrangement of the plurality of the first reinforcing ribs and the plurality of the second reinforcing ribs, the cross-sectional area of the conduction part for current passing can also be effectively increased, so as to increase the conduction effect of electric energy on the conduction part.

[0019] According to an embodiment of the present application, wherein the ends of the plurality of the first reinforcing ribs close to the first connection part are aligned along the second direction, and the straight line where the ends of the plurality of the first reinforcing ribs close to the first connection part are located is parallel to the first edge line of the conduction part close to the first connection part.

[0020] In the embodiment of the present application, based on the ends of the plurality of the first reinforcing ribs close to the first connection part, the turning position when the first connection part rotates relative to the conduction part can be more effectively defined, so as to further improve the rotation yield rate of the first connection part.

[0021] According to an embodiment of the present application, wherein the distance between the end of the first reinforcing rib close to the first connection part and the first edge line is less than or equal to 0.5 millimeters.

[0022] In the embodiment of the present application, by limiting the maximum distance between the end of the first reinforcing rib close to the first connection part and the first edge line, the situation that the first connection part bends itself when the first connection part rotates relative to the conduction part can be avoided.

[0023] According to an embodiment of the present application, wherein the ends of the plurality of the second reinforcing ribs close to the second connection part are aligned along the second direction, and the straight line where the ends of the plurality of the second reinforcing ribs close to the second connection part are located is parallel to the second edge line of the conduction part close to the second connection part.

[0024] In the embodiment of the present application, based on the ends of the plurality of the second reinforcing ribs close to the second connection part, the turning position when the second connection part rotates relative to the conduction part can be more effectively defined, so as to further improve the rotation yield rate of the second connection part.

[0025] According to an embodiment of the present application, the distance between the end of the second reinforcing rib close to the second connecting portion and the second edge line is less than or equal to 0.5 mm.

[0026] In the embodiment of the present application, by defining the maximum distance between the end of the second reinforcing rib close to the second connecting portion and the second edge line, the situation that the second connecting portion is bent by itself when the second connecting portion rotates relative to the conducting portion is avoided.

[0027] According to an embodiment of the present application, the height of the first reinforcing rib protruding from the first surface and the height of the second reinforcing rib protruding from the second surface are both greater than or equal to the thickness of the conducting portion.

[0028] In the embodiment of the present application, by defining the protruding heights of the first reinforcing rib and the second reinforcing rib, the support of the first reinforcing rib and the second reinforcing rib for the first connecting portion and the second connecting portion can be effectively ensured, thereby effectively avoiding the problem of brittle fracture of the current collecting assembly at the bending portion; in addition, by defining the protruding heights of the first reinforcing rib and the second reinforcing rib, a larger buffer space can be provided for the current collecting assembly in the thickness direction of the conducting portion to reduce the situation that the current collecting assembly is broken due to extrusion.

[0029] According to an embodiment of the present application, the first connecting member further includes a first bending portion and a second bending portion;

[0030] The first bending portion is respectively connected to the first connecting portion and the conducting portion, and the first bending portion can be bent so that the first connecting portion rotates to the first side of the conducting portion;

[0031] The second bending portion is respectively connected to the second connecting portion and the conducting portion, and the second bending portion can be bent so that the second connecting portion rotates to the second side of the conducting portion.

[0032] In the embodiment of the present application, by respectively providing the first bending portion and the second bending portion between the first connecting portion and the conducting portion, and between the second connecting portion and the conducting portion, the rotation of the first connecting portion and the second connecting portion relative to the conducting portion is facilitated.

[0033] According to an aspect of the present application, there is provided an energy storage device, the energy storage device including:

[0034] A housing having a receiving cavity and an opening communicating the receiving cavity and the external space;

[0035] An electrode assembly accommodated in the receiving cavity;

[0036] An end cap assembly sealing the opening of the housing;

[0037] and the current collector assembly described in the above aspect, the current collector assembly is located between the electrode assembly and the end cap assembly and connects the electrode assembly and the end cap assembly.

[0038] In the embodiments of the present application, based on the bending yield of the current collector assembly and the connection yields of the current collector assembly with the electrode terminals and the electrode assembly, the assembly yield of the energy storage device is improved, and the potential safety hazards of the energy storage device are reduced.

[0039] According to one aspect of the present application, there is provided an electrical device, which includes the energy storage device described in the above aspect, and the energy storage device supplies power to the electrical device.

[0040] In the embodiments of the present application, in combination with the energy storage device described above, when the yield of the battery cells is relatively high, the safety of using the electrical device can be improved, and when the battery cells have high electrical conductivity, the stability of using the electrical device can be improved.

[0041] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] By referring to the accompanying drawings and describing in detail its exemplary embodiments, the above and other features and advantages of the present application will become more apparent.

[0043] Figure 1 is a schematic cross-sectional structure view of a battery cell shown according to an exemplary embodiment.

[0044] Figure 2 is a schematic top view structure view of a current collector assembly before bending shown according to an exemplary embodiment.

[0045] Figure 3 is a schematic bottom view structure view of a current collector assembly before bending shown according to an exemplary embodiment.

[0046] Figure 4 is a schematic axonometric structure view of a current collector assembly after bending shown according to an exemplary embodiment.

[0047] Figure 5 is a schematic structure view of a current collector assembly connected to an end cap assembly shown according to an exemplary embodiment.

[0048] Among them, the reference numerals are explained as follows:

[0049] 100, battery cell;

[0050] 10, housing; 20, electrode assembly; 30, end cap assembly; 40, current collector assembly;

[0051] 11. Accommodating cavity;

[0052] 31. Electrode terminal; 32. Cover body;

[0053] 41. First connecting member; 42. Second connecting member;

[0054] 411. First connecting portion; 412. Second connecting portion; 413. Conductive portion; 414. First bending portion; 415. Second bending portion;

[0055] L1. First edge line; L2. Second edge line;

[0056] 4131. First reinforcing rib; 4132. Second reinforcing rib; 4133. First surface; 4134. Second surface. Detailed implementation manners

[0057] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted.

[0058] An energy storage device is provided in an embodiment of the present application, and the energy storage device can be, but is not limited to, a battery cell, a battery module, a battery pack, a battery system, etc.

[0059] Among them, for the battery cell, it can be a lithium-ion secondary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the battery cell can be in a cylindrical shape, a flat shape, a cuboid shape, etc., and the embodiment of the present application does not limit this.

[0060] Next, taking the energy storage device as a battery cell as an example, the energy storage device will be explained in detail.

[0061] As Figure 1 shown, the battery cell 100 includes a housing 10, an electrode assembly 20, an end cover assembly 30, and a current collecting assembly 40. The housing 10 has an accommodating cavity 11 and an opening communicating the accommodating cavity 11 and the external space. The electrode assembly 20 is accommodated in the accommodating cavity 11. The end cover assembly 30 seals the opening of the housing 10. The current collecting assembly 40 is located between the electrode assembly 20 and the end cover assembly 30 and connects the electrode assembly 20 and the end cover assembly 30.

[0062] Among them, the end cap assembly 30 includes an electrode terminal 31 and a cover body 32. The cover body 32 seals the opening of the housing 10. The electrode terminal 31 is assembled on the cover body 32 and is connected to the tab of the electrode assembly 20 through a current collecting assembly 40, so as to export the electrical energy of the electrode assembly 20 through the electrode terminal 31.

[0063] Among them, for the current collecting assembly 40 connecting the tab and the electrode terminal 31, in order to facilitate the assembly of the battery cell 100, the current collecting assembly 40 is a bendable plate-like structure. Specifically, both ends of the current collecting assembly 40 are respectively connected to the electrode terminal 31 and the tab of the electrode assembly 20, and then the current collecting assembly 40 is bent so that the cover body 32 can seal the opening of the housing 10.

[0064] In the related art, when bending the current collecting assembly 40, it is difficult to determine the bending position, resulting in the skew of the current collecting assembly 40 after bending (that is, the straight line where the crease is located is not perpendicular to the length direction of the current collecting assembly 40), reducing the bending yield rate of the current collecting assembly 40. Furthermore, during the assembly process of the battery cell 100, it is easy to cause interference between the current collecting assembly 40 and the end cap assembly 30, leading to safety problems of the battery cell 100.

[0065] In the embodiments of the present application, a current collecting assembly 40 is provided. Based on this current collecting assembly 40, the bending yield rate is improved, and at the same time, the connection yield rate between the current collecting assembly 40 and the electrode terminal 31 and the electrode assembly 20 can be improved, thereby improving the assembly yield rate of the battery cell 100 and reducing the safety hazards of the battery cell 100.

[0066] Next, the structure of the current collecting assembly 40 will be explained in detail.

[0067] Figure 2 、 Figure 3 Respectively illustrate the top view and the bottom view of a current collecting assembly 40 before bending provided by the embodiments of the present application. Figure 4 Illustrates a schematic structural diagram of a current collecting assembly 40 after bending provided by the embodiments of the present application. As Figure 2 、 Figure 3 and Figure 4 As shown, the current collecting assembly 40 includes: a first connecting member 41, which includes a first connecting portion 411, a second connecting portion 412 distributed along the first direction X, and a conducting portion 413 connecting the first connecting portion 411 and the second connecting portion 412.

[0068] Among them, the conduction part 413 has at least one first reinforcing rib 4131 extending from one end close to the first connection part 411 in a direction away from the first connection part 411, and at least one second reinforcing rib 4132 extending from one end close to the second connection part 412 in a direction away from the second connection part 412. The first reinforcing rib 4131 protrudes from the first surface 4133 of the conduction part 413, and the first connection part 411 can rotate to the first side where the first surface 4133 of the conduction part 413 is located. The second reinforcing rib 4132 protrudes from the second surface 4134 of the conduction part 413, and the second connection part 412 can rotate to the second side where the second surface 4134 of the conduction part 413 is located.

[0069] The second connecting member 42, the second connecting portion 412 is mechanically connected (such as laser welding, etc.) to the surface of the second connecting member 42, and after the second connecting portion 412 is bent to the second side of the conduction portion 413, the second connecting member 42 is located on the side of the second connecting portion 412 away from the conduction portion 413.

[0070] In the embodiment of the present application, based on the first reinforcing rib 4131 and the second reinforcing rib 4132 on the conduction part 413, the structural strength of the conduction part 413 can be improved, and at the same time, the positioning can be realized when the first connection part 411 and the second connection part 412 rotate relative to the conduction part 413, improving the bending yield rate of the current collecting assembly 40. After the first connection part 411 and the second connection part 412 are bent, the first reinforcing rib 4131 and the second reinforcing rib 4132 can support the first connection part 411 and the second connection part 412, avoiding the situation that the included angle between the first connection part 411, the second connection part 412 and the conduction part 413 is too small and lacking a buffer space, and further avoiding the brittle fracture during the mechanical transportation of the battery cell due to vibration; in addition, for the separately provided second connecting member 42, through the design of the full-round outer contour of the second connecting member 42, the situation that a notch is formed at the edge of the second connecting member 42 after the current collecting assembly 40 is bent can be avoided. In this way, when the second connecting member 42 is connected to the tab of the electrode assembly 20, the situation that the tab is exposed outside the edge of the second connecting member 42 can be effectively avoided, improving the fitting degree between the current collecting assembly 40 and the tab of the electrode assembly 20, and avoiding the short circuit caused by the warped or flattened tab coming into contact with the housing 10, improving the connection yield rate between the current collecting assembly 40 and the electrode assembly 20.

[0071] Among them, before the current collector assembly 40 is bent, the first connection portion 411 is in a fixed state after being connected to the electrode terminal 31, and the second connection portion 412 is in a fixed state after being connected to the second connection member 42. At this time, the arrangement of the first reinforcing rib 4131 and the second reinforcing rib 4132 on the conduction portion 413 enables the current collector assembly 40 to be bent only at the position on the side of the first reinforcing rib 4131 close to the first connection portion 411 and at the position on the side of the second reinforcing rib 4132 close to the second connection portion 412, thereby realizing the positioning when the first connection portion 411 and the second connection portion 412 rotate relative to the conduction portion 413.

[0072] Among them, since the conduction portion 413 is connected to the second connection member 42 through the second connection portion 412, when the second connection portion 412 rotates relative to the conduction portion 413, it will not affect the shape of the second connection member 42, and after the second connection portion 412 rotates to the second side of the conduction portion 413, combined with Figure 4 As shown, in the thickness direction of the conduction portion 413, the conduction portion 413 is located within the region where the second connection member 42 is located, thereby avoiding the restriction of the outer contour of the second connection member 42 by the conduction portion 413. Therefore, the outer contour of the second connection member 42 can be set according to the cross-sectional contour of the accommodation cavity of the housing 10. Exemplarily, the housing 10 has a cylindrical accommodation cavity. At this time, as Figure 2 or Figure 3 shown, the second connection member 42 has a circular plate-like structure.

[0073] Among them, as Figure 3 shown, in the thickness direction of the conduction portion 413, there is no overlapping region between the first reinforcing rib 4131 and the second connection member 42 to avoid interference between the first reinforcing rib 4131 and the second connection member 42 when the second connection member 42 located on the first side of the conduction portion 413 is mechanically connected to the second connection portion 412; as Figure 5 shown, in the thickness direction of the conduction portion 413, there is no overlapping region between the second reinforcing rib 4132 and the end cover assembly 30 to avoid interference between the second reinforcing rib 4132 and the cover body 32 when the electrode terminal 31 located on the second side of the conduction portion 413 is connected to the first connection portion 411, thereby ensuring the connection effect between the first connection member 41 and the electrode terminal 31 and the second connection member 42, and further ensuring the stability when the current collector assembly 40 conducts the electric energy of the electrode assembly 20 to the electrode terminal 31.

[0074] In the embodiment of the present application, the first connection member 41 has a plate-like structure with a certain length, and the length direction of the first connection member 41 is the first direction X described above. The first connection portion 411, the second connection portion 412, and the conduction portion 413 included in the first connection member 41 can be an integrally formed structural member to ensure the conduction effect of the current on the first connection member 41.

[0075] In some embodiments, such as Figure 2 or Figure 4 shown, the first connecting member 41 further includes a first bending portion 414 and a second bending portion 415; the first bending portion 414 is respectively connected to the first connecting portion 411 and the conducting portion 413, and the first bending portion 414 can be bent so that the first connecting portion 411 rotates to the first side of the conducting portion 413; the second bending portion 415 is respectively connected to the second connecting portion 412 and the conducting portion 413, and the second bending portion 415 can be bent so that the second connecting portion 412 rotates to the second side of the conducting portion 413. Thus, through the arrangement of the first bending portion 414 and the second bending portion 415, it is convenient to realize the rotation of the first connecting portion 411 relative to the conducting portion 413 and the rotation of the second connecting portion 412 relative to the conducting portion 413 respectively.

[0076] Wherein, before the current collecting assembly 40 is bent, the first bending portion 414 and the second bending portion 415 are both in a flat plate-like structure as shown in Figure 2 shown, and after the current collecting assembly 40 is bent, the first bending portion 414 and the second bending portion 415 are both in an arc-shaped plate-like structure as shown in Figure 4 shown.

[0077] Optionally, both ends of the first bending portion 414 and the second bending portion 415 along the second direction Y have arc-shaped notches, so as to further improve the positioning effect of the bending positions when the first connecting portion 411 and the second connecting portion 412 are bent, and improve the bending yield rate when the current collecting assembly 40 is bent.

[0078] In the embodiments of the present application, the first reinforcing rib 4131 and the second reinforcing rib 4132 can be structures independent of the conducting portion 413. At this time, the first reinforcing rib 4131 and the second reinforcing rib 4132 can be fixed on the conducting portion 413 by laser welding, or can be adhered to the conducting portion 413 by conductive adhesive; of course, the first reinforcing rib 4131 and the second reinforcing rib 4132 and the conducting portion 413 can also be an integral structure, that is, the first reinforcing rib 4131 and the second reinforcing rib 4132 can be formed on the conducting portion 413 by stamping, so as to ensure the connection strength between the first reinforcing rib 4131, the second reinforcing rib 4132 and the conducting portion 413.

[0079] Among them, after the current collector assembly 40 is bent, since the first reinforcing rib 4131 is used to support the first connecting portion 411 and the second reinforcing rib 4132 is used to support the second connecting portion 412, in order to effectively ensure the angle between the first connecting portion 411 and the conducting portion 413, and the angle between the second connecting portion 412 and the conducting portion 413, the first reinforcing rib 4131 and the second reinforcing rib 4132 can be set slightly higher, that is, the height of the first reinforcing rib 4131 protruding from the first surface 4133 of the conducting portion 413 and the height of the second reinforcing rib 4132 protruding from the second surface 4134 of the conducting portion 413 are slightly higher. Exemplarily, in the thickness direction of the conducting portion 413, the height of the first reinforcing rib 4131 protruding from the first surface 4133 and the height of the second reinforcing rib 4132 protruding from the second surface 4134 are both greater than or equal to the thickness of the conducting portion 413. Additionally, by limiting the protruding heights of the first reinforcing rib 4131 and the second reinforcing rib 4132, the current collector assembly 40 can have a larger buffer space in the thickness direction of the conducting portion 413, so as to reduce the situation where the current collector assembly 40 is broken due to extrusion.

[0080] Among them, the extending direction of the first reinforcing rib 4131 and the extending direction of the second reinforcing rib 4132 can be parallel or intersect, and the extending directions of the first reinforcing rib 4131 and the second reinforcing rib 4132 can be parallel to the first direction X or form an acute angle with the first direction X. The embodiments of the present application do not make limitations in this regard.

[0081] When the extending directions of both the first reinforcing rib 4131 and the second reinforcing rib 4132 are parallel to the first direction X, it can avoid the interference between the two when the first reinforcing rib 4131 and the second reinforcing rib 4132 are provided on the conducting portion 413, reduce the design difficulty of the conducting portion 413, and can also ensure the uniformity of the structural strength of the conducting portion 413 in the second direction Y, and avoid the situation of tearing between the conducting portion 413 and the first connecting portion 411 and the second connecting portion 412. Among them, the second direction Y is perpendicular to the first direction X.

[0082] In some embodiments, such as Figure 2 or Figure 3 As shown, the first reinforcing rib 4131 and the second reinforcing rib 4132 are staggeredly distributed in the second direction Y, and the first reinforcing rib 4131 and the second reinforcing rib 4132 partially overlap in the second direction Y. In this way, the stability of the structure of the conducting portion 413 itself is improved, the situation where the conducting portion 413 is bent by itself when the current collector assembly 40 is bent is avoided, and the bending yield rate of the current collector assembly 40 is improved.

[0083] Optionally, such as Figure 3As shown, the length of the overlapping portion of the first reinforcing rib 4131 and the second reinforcing rib 4132 along the first direction X is greater than or equal to 0.5 millimeters. In this way, by defining the minimum length of the overlapping portion of the first reinforcing rib 4131 and the second reinforcing rib 4132 in the second direction Y along the first direction X, the structural stability of the conduction portion 413 itself, especially the position where the overlapping portion is located, is further improved. Furthermore, when the current collecting component 40 is bent, it is possible to avoid the tearing of the conduction portion 413 at the position where the overlapping portion is located due to the limitation of the first reinforcing rib 4131 and the second reinforcing rib 4132, and improve the bending yield rate of the current collecting component 40. Exemplarily, the length of the overlapping portion along the first direction X is 0.5 millimeters, 1 millimeter, 2 millimeters, etc.

[0084] In the embodiments of the present application, for the first reinforcing rib 4131 and the second reinforcing rib 4132 on the conduction portion 413, the number of the first reinforcing ribs 4131 can be one or multiple, and the number of the second reinforcing ribs 4132 can be one or multiple.

[0085] When the conduction portion 413 has one first reinforcing rib 4131 and one second reinforcing rib 4132, in order to ensure that the end of the first reinforcing rib 4131 close to the first connecting portion 411 can effectively limit the turning position when the first connecting portion 411 rotates relative to the conduction portion 413, and to ensure that the end of the second close to the second connecting portion 412 can effectively limit the turning position when the second connecting portion 412 rotates relative to the conduction portion 413, the first reinforcing rib 4131 and the second reinforcing rib 4132 can be set to have a certain width in the second direction Y.

[0086] As Figure 2 or Figure 3 As shown, when the conduction portion 413 has multiple first reinforcing ribs 4131 and multiple second reinforcing ribs 4132, the multiple first reinforcing ribs 4131 and the multiple second reinforcing ribs 4132 are both arranged along the second direction Y, and the first reinforcing ribs 4131 and the second reinforcing ribs 4132 are alternately arranged along the second direction Y.

[0087] In this way, through the arrangement of the multiple first reinforcing ribs 4131 and the multiple second reinforcing ribs 4132, and the alternating distribution between the first reinforcing ribs 4131 and the second reinforcing ribs 4132, the structural strength of the overall area of the conduction portion 413 can be effectively ensured, and the situation of local tearing due to weak local structural strength can be avoided; in addition, through the arrangement of the multiple first reinforcing ribs 4131 and the multiple second reinforcing ribs 4132, the cross-sectional area of the current passing through the conduction portion 413 can also be effectively increased to increase the conduction effect of electric energy on the conduction portion 413. Furthermore, for the energy storage device including the current collecting component 40, the electrical performance of the energy storage device can be effectively improved.

[0088] Among them, the first reinforcing ribs 4131 and the second reinforcing ribs 4132 can be distributed alternately one by one, or alternately in pairs. Of course, they can also be distributed alternately in other ways, and the embodiments of the present application do not limit this. For example, one and two alternate distribution, that is, in the second direction Y, one first reinforcing rib 4131, two second reinforcing ribs 4132, one first reinforcing rib 4131, two second reinforcing ribs 4132, and one first reinforcing rib 4131.

[0089] In some embodiments, for the case where the above-mentioned conduction part 413 includes a plurality of first reinforcing ribs 4131, such as Figure 2 As shown, the ends of the plurality of first reinforcing ribs 4131 close to the first connecting part 411 are aligned along the second direction Y, and the straight line where the ends of the plurality of first reinforcing ribs 4131 close to the first connecting part 411 are located is parallel to the first edge line L1 of the conduction part 413 close to the first connecting part 411. In this way, based on the ends of the plurality of first reinforcing ribs 4131 close to the first connecting part 411, the turning position when the first connecting part 411 rotates relative to the conduction part 413 can be more effectively defined, so as to further improve the rotation yield of the first connecting part 411.

[0090] Among them, in addition to the ends of the plurality of first reinforcing ribs 4131 close to the first connecting part 411 being aligned along the second direction Y, there may also be several first reinforcing ribs 4131 among the plurality of first reinforcing ribs 4131 that are closest to the first connecting part 411, and the ends of the several first reinforcing ribs 4131 close to the first connecting part 411 are aligned along the second direction Y. At this time, when the first connecting part 411 rotates relative to the conduction part 413, it is positioned based on the ends of the several first reinforcing ribs 4131 close to the first connecting part 411. Exemplarily, among the plurality of first reinforcing ribs 4131, the first reinforcing ribs 4131 and the first reinforcing ribs 4131 located on both sides in the second direction Y are the closest to the first connecting part 411, and the ends of the first reinforcing ribs 4131 and the first reinforcing ribs 4131 located on both sides close to the first connecting part 411 are aligned along the second direction Y.

[0091] Optionally, the distance between the end of the first reinforcing rib 4131 close to the first connecting part 411 and the first edge line L1 is less than or equal to 0.5 mm. In this way, by limiting the maximum distance between the end of the first reinforcing rib 4131 and the first edge line L1, it is ensured that the first connecting part 411 can rotate relative to the conduction part 413 at the connection with the conduction part 413, avoiding affecting the connection effect between the first connecting part 411 and the electrode terminal 31, and further ensuring the conduction effect of electric energy between the first connecting part 411 and the electrode terminal 31. Exemplarily, the distance between the end of the first reinforcing rib 4131 close to the first connecting part 411 and the first edge line L1 is 0.2 mm, 0.3 mm, 0.5 mm, etc.

[0092] In some embodiments, for the case where the above-mentioned conduction part 413 includes a plurality of second reinforcing ribs 4132, as Figure 2 shown, the ends of the plurality of second reinforcing ribs 4132 close to the second connecting part 412 are aligned along the second direction Y, and the straight line where the ends of the plurality of second reinforcing ribs 4132 close to the second connecting part 412 are located is parallel to the second edge line L2 of the conduction part 413 close to the second connecting part 412. Thus, based on the ends of the plurality of second reinforcing ribs 4132 close to the second connecting part 412, the turning position when the second connecting part 412 rotates relative to the conduction part 413 can be more effectively defined, so as to further improve the rotation yield of the second connecting part 412.

[0093] Among them, in addition to the ends of the plurality of second reinforcing ribs 4132 close to the second connecting part 412 being aligned along the second direction Y, it is also possible that there are several second reinforcing ribs 4132 closest to the second connecting part 412 among the plurality of second reinforcing ribs 4132, and the ends of the several second reinforcing ribs 4132 close to the second connecting part 412 are aligned along the second direction Y. At this time, when the second connecting part 412 rotates relative to the conduction part 413, it is positioned based on the ends of the several second reinforcing ribs 4132 close to the second connecting part 412. Exemplarily, the second reinforcing ribs 4132 located on both sides in the second direction Y among the plurality of second reinforcing ribs 4132 and the second reinforcing ribs 4132 are the closest to the second connecting part 412, and the ends of the second reinforcing ribs 4132 located on both sides close to the second connecting part 412 are aligned along the second direction Y.

[0094] Optionally, the distance between the end of the second reinforcing rib 4132 close to the second connecting part 412 and the second edge line L2 is less than or equal to 0.5 mm. Thus, by defining the maximum distance between the end of the second reinforcing rib 4132 and the second edge line L2, it is ensured that the second connecting part 412 can rotate relative to the conduction part 413 at the connection with the conduction part 413, avoiding affecting the connection effect between the second connecting part 412 and the second connecting member 42, and further ensuring the conduction effect of electric energy between the second connecting part 412 and the second connecting member 42. Exemplarily, the distance between the end of the second reinforcing rib 4132 close to the second connecting part 412 and the second edge line L2 is 0.2 mm, 0.3 mm, 0.5 mm, etc.

[0095] The embodiments of the present application also provide an electrical device, which can be an energy storage device, a vehicle, an energy storage container, etc. The electrical device includes the energy storage device described in the above embodiments, and the energy storage device supplies power to the electrical device. Thus, combined with the energy storage device described above, when the yield of the battery cell 100 is relatively high, the safety of the electrical device during use can be improved, and when the battery cell 100 has high electrical conductivity, the stability of the electrical device during use can be improved.

[0096] In the embodiments of the application, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to specific circumstances.

[0097] In the description of the embodiments of the application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the application.

[0098] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0099] The above are only the preferred embodiments of the embodiments of the application and are not used to limit the embodiments of the application. For those skilled in the art, the embodiments of the application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the application shall be included in the protection scope of the embodiments of the application.

Claims

1. A current collection component (40), applied to an energy storage device, is characterized in that include: A first connecting member (41), comprising a first connecting portion (411), a second connecting portion (412) distributed along a first direction, and a conducting portion (413) connected between the first connecting portion (411) and the second connecting portion (412); The conducting portion (413) comprises at least one first reinforcing rib (4131) extending from one end close to the first connecting portion (411) toward a direction away from the first connecting portion (411), and at least one second reinforcing rib (4132) extending from one end close to the second connecting portion (412) toward a direction away from the second connecting portion (412); the first reinforcing rib (4131) protrudes from a first surface (4133) of the conducting portion (413), and the first connecting portion (411) can be rotated to a first side where the first surface (4133) of the conducting portion (413) is located; the second reinforcing rib (4132) protrudes from a second surface (4134) of the conducting portion (413), and the second connecting portion (412) can be rotated to a second side where the second surface (4134) of the conducting portion (413) is located; The first reinforcing rib (4131) and the second reinforcing rib (4132) are staggeredly distributed in a second direction, and the first reinforcing rib (4131) and the second reinforcing rib (4132) partially overlap in the second direction, and the second direction is perpendicular to the first direction; A second connecting member (42), wherein the second connecting portion (412) is mechanically connected to a surface of the second connecting member (42), and after the second connecting portion (412) rotates to the second side of the conducting portion (413), the second connecting member (42) is located on a side of the second connecting portion (412) away from the conducting portion (413); The first connecting member (41) further comprises a first bending portion (414) and a second bending portion (415); the first bending portion (414) is respectively connected to the first connecting portion (411) and the conducting portion (413), and the first bending portion (414) can be bent so that the first connecting portion (411) can be rotated to the first side of the conducting portion (413); the second bending portion (415) is respectively connected to the second connecting portion (412) and the conducting portion (413), and the second bending portion (415) can be bent so that the second connecting portion (412) can be rotated to the second side of the conducting portion (413); both ends of the first bending portion (414) and the second bending portion (415) along the second direction have arc-shaped notches.

2. The current collector assembly (40) according to claim 1, characterized in that, The length of the overlapping portion of the first reinforcing rib (4131) and the second reinforcing rib (4132) along the first direction is greater than or equal to 0.5 mm.

3. The current collector assembly (40) according to claim 1, wherein, An extension direction of the first reinforcing rib (4131) and an extension direction of the second reinforcing rib (4132) are both parallel to the first direction.

4. The current collector assembly (40) according to any one of claims 1-3, characterized in that, The conducting portion (413) has a plurality of the first reinforcing ribs (4131) and a plurality of the second reinforcing ribs (4132); A plurality of the first reinforcing ribs (4131) and a plurality of the second reinforcing ribs (4132) are arranged along a second direction, and the first reinforcing ribs (4131) and the second reinforcing ribs (4132) are alternately arranged along the second direction.

5. The current collector assembly (40) according to claim 4, characterized in that, Ends of the plurality of the first reinforcing ribs (4131) close to the first connection part (411) are aligned along the second direction, and a straight line where the ends of the plurality of the first reinforcing ribs (4131) close to the first connection part (411) are located is parallel to a first edge line of the conduction part (413) close to the first connection part (411).

6. The current collector assembly (40) according to claim 5, characterized in that, A distance between an end of the first reinforcing rib (4131) close to the first connection part (411) and the first edge line is less than or equal to 0.5 millimeters.

7. The current collector assembly (40) according to claim 4, characterized in that, Ends of the plurality of the second reinforcing ribs (4132) close to the second connection part (412) are aligned along the second direction, and a straight line where the ends of the plurality of the second reinforcing ribs (4132) close to the second connection part (412) are located is parallel to a second edge line of the conduction part (413) close to the second connection part (412).

8. The current collector assembly (40) according to claim 7, characterized in that, A distance between an end of the second reinforcing rib (4132) close to the second connection part (412) and the second edge line is less than or equal to 0.5 millimeters.

9. The current collector assembly (40) according to claim 1, wherein, In a thickness direction of the conduction part (413), a height by which the first reinforcing rib (4131) protrudes from a first surface (4133) and a height by which the second reinforcing rib (4132) protrudes from a second surface (4134) are both greater than or equal to a thickness of the conduction part (413).

10. An energy storage device, characterized in that, The energy storage device includes: A housing (10) having a receiving cavity (11) and an opening communicating the receiving cavity with an external space; An electrode assembly (20) accommodated in the receiving cavity (11); An end cap assembly (30) sealing the opening of the housing (10); And a current collecting assembly (40) according to any one of claims 1-9 above, the current collecting assembly (40) being located between the electrode assembly (20) and the end cap assembly (30) and connecting the electrode assembly (20) and the end cap assembly (30).

11. An electrical device, characterized in that, The electrical equipment includes the energy storage device according to claim 10 above, and the energy storage device supplies power to the electrical equipment.

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