Current collecting assembly, battery cell, battery pack and electrical equipment

Abstract

The present application provides a current collecting assembly, a battery cell, a battery pack and an electrical device, and relates to the field of battery technology. The current collecting assembly includes a current collecting piece, a pole, an insulating piece and at least one conductive piece. Among them, the current collecting piece is used to electrically connect to the pole lug of the battery cell; the pole is conductively connected to the current collecting piece; along the axial direction of the pole, the insulating piece is located on the side of the current collecting piece close to the pole; the conductive piece and the current collecting piece are a split structure, the conductive piece is located between the insulating piece and the current collecting piece, and the conductive piece is conductively connected to the pole and the current collecting piece. The current collecting piece provided in the present application is used to collect current, which can improve the current carrying capacity of the battery cell.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a current collecting assembly, a battery cell, a battery pack and an electrical device. Background Art

[0002] In the related art, the connection area between the pole of the battery cell and the current collecting plate is small, resulting in poor current carrying capacity of the battery cell. Summary of the invention

[0003] The present application provides a current collecting assembly, a battery cell, a battery pack and an electrical device, which can improve the overcurrent performance of the battery cell.

[0004] In the first aspect, the present application provides a current collecting assembly, which includes a current collecting member, a pole, an insulating member, and at least one conductive member. The current collecting member is used to electrically connect to the pole lug of the battery cell; the pole is conductively connected to the current collecting member; along the axial direction of the pole, the insulating member is located on the side of the current collecting member close to the pole; the conductive member and the current collecting member are split structures, the conductive member is located between the insulating member and the current collecting member, and the conductive member is conductively connected to the pole and the current collecting member.

[0005] Optionally, the conductive member and the pole are of separate structures.

[0006] Optionally, the conductive member and the pole are arranged along the radial direction of the pole.

[0007] Optionally, along the axial direction of the pole, end surfaces at both ends of the conductive member abut against the insulating member and the current collecting member respectively.

[0008] Optionally, a side of the insulating member facing the conductive member is concave inwardly in a direction away from the conductive member to form a mounting groove, and the conductive member is embedded in the mounting groove.

[0009] Optionally, the conductive member is interference fit with the mounting groove.

[0010] Optionally, the installation groove passes through one end of the insulating member toward the pole, so that the installation groove is formed with an escape opening, and the conductive member is conductively connected to the pole through the escape opening.

[0011] Optionally, along the axial direction of the pole, the ratio of the length of the portion of the insulating member opposite to the conductive member to the length of the conductive member is 1-7:1.

[0012] Optionally, the number of the conductive members is at least two, and the at least two conductive members are arranged along the circumference of the pole.

[0013] Optionally, one side of the insulating member facing the current collecting member is concave inwardly in a direction away from the current collecting member to form a slot, and the current collecting member is formed with a convex block corresponding to the slot, and the convex block is embedded in the slot.

[0014] Optionally, along the radial direction of the pole, the clamping groove is located at the outer edge of the insulating member.

[0015] Optionally, the insulating member is sleeved on the pole, the insulating member protrudes outwardly along the radial direction of the pole, and is formed with at least one first lug, and the clamping groove is formed on the first lug.

[0016] Optionally, the number of the slots is at least two, and the at least two slots are arranged at intervals along the circumference of the pole. The number of the protrusions is at least two, and the protrusions are arranged in a one-to-one correspondence with the slots.

[0017] Optionally, the insulating member includes at least two sub-insulating members, the at least two sub-insulating members are detachably connected, and the at least two sub-insulating members are arranged along the circumference of the pole.

[0018] Optionally, two adjacent sub-insulators each include a connecting surface, the connecting surface extends along the axial direction of the pole, a limiting boss is formed on the connecting surface, and the limiting bosses of the two adjacent sub-insulators are arranged along the axial direction of the pole and are in limiting contact.

[0019] In a second aspect, the present application provides a battery cell, and the battery cell includes the current collecting assembly provided in the first aspect of the present application.

[0020] In a third aspect, the present application provides a battery pack, comprising a box body and the battery cell provided in the second aspect of the present application. The box body is formed with a receiving space; the number of the battery cells is at least two, and at least two battery cells are both arranged in the receiving space.

[0021] In a fourth aspect, the present application provides an electrical device, which includes the battery pack provided in the third aspect of the present application or the battery cell provided in the second aspect of the present application.

[0022] In the current collecting assembly provided in the present application, the pole and the current collecting member are not only directly electrically connected, but also indirectly electrically connected through a conductive member, thereby increasing the connection area of ​​the electrical connection, that is, increasing the flow area between the pole and the current collecting member, which is beneficial to improving the flow capacity of the battery cell.

[0023] In addition, in the present application, the conductive member and the current collector are of a split structure, and the conductive member and the current collector can be processed separately, which is conducive to improving the convenience of processing and manufacturing the current collector and the conductive member. Moreover, the conductive member is located between the insulating member and the current collector, so that the insulating member and the current collector can limit the conductive member, so that the conductive member can be firmly connected between the current collector and the pole, so as to achieve the effect of increasing the flow area.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic structural diagram of a current collecting assembly in some embodiments of the present application;

[0027] Figure 2 yes Figure 1 Cross-section at the middle BB;

[0028] Figure 3 is a schematic diagram of the structure of a current collecting plate in some embodiments of the present application;

[0029] Figure 4 is a schematic diagram of the structure of the pole in some embodiments of the present application;

[0030] Figure 5 is a schematic diagram of the structure of the overcurrent block in some embodiments of the present application;

[0031] Figure 6 is one of the structural schematic diagrams of the insulating member in some embodiments of the present application;

[0032] Figure 7 This is the second structural schematic diagram of the insulating member in some embodiments of the present application;

[0033] Figure 8 is a schematic structural diagram of a conductive member in some embodiments of the present application;

[0034] Fig. 9 This is one of the schematic diagrams of the structure of the insulating member and the current collecting member in some embodiments of the present application;

[0035] Fig.10 This is the second structural schematic diagram of the cooperation between the insulating member and the current collecting member in some embodiments of the present application;

[0036] Fig.11 This is the third structural schematic diagram of the insulating member in some embodiments of the present application;

[0037] Fig.12 yes Fig.11 Sectional view at CC;

[0038] Fig.13 yes Fig.12 A partial enlarged view of point D in the middle.

[0039] Reference numerals:

[0040] 1-current collecting part; 11-mounting hole; 12-second lug; 121-bump; 13-third lug; 2-pole; 21-first end of pole; 3-sub-insulating part; 31-mounting groove; 312-avoidance; 33-first lug; 331-slot; 34-limiting boss; 4-conductive part; 5-current block; 6-mounting boss; a-axial direction of pole. DETAILED DESCRIPTION

[0041] Embodiments of the present invention will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] The term "first" or "second" in the specification and claims of the present application may include one or more than two of the features, either explicitly or implicitly. In the description of the present invention, "at least two" means two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0044] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The embodiment of the present application provides an electric device, and the electric device includes a battery pack. In the embodiment of the present application, there can be many types of electric devices. For example, the electric device can refer to electric devices such as vehicles, ships or aircraft. There can be many types of vehicles. For example, they can be sedans, off-road vehicles, sport utility vehicles (SUVs), buses, trucks, pickup trucks or RVs, etc.

[0047] The battery pack provided in the embodiment of the present application includes a box body and a battery cell. The box body is formed with a storage space; the number of battery cells is at least two, and at least two battery cells are arranged in the storage space. The battery cells provided in the present application can be of various types, and can be, for example, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the present application does not limit this. In addition, according to the packaging method, the battery cells in the embodiment of the present application can be cylindrical battery cells, etc.

[0048] Please refer to Figure 1 and Figure 2 The battery cell provided in the embodiment of the present application includes a current collecting assembly, which is used to collect current. The current collecting assembly includes a current collecting part 1, a pole 2, an insulating part and at least one conductive part 4. Among them, the current collecting part 1 is used to be electrically connected to the pole lug of the battery cell; the pole 2 is conductively connected to the current collecting part 1; along the axial direction a of the pole, the insulating part is located on the side of the current collecting part 1 close to the pole 2; the conductive part 4 and the current collecting part 1 are a split structure, the conductive part 4 is located between the insulating part and the current collecting part 1, and the conductive part 4 is conductively connected to the pole 2 and the current collecting part 1.

[0049] Please refer to Figure 1 and Figure 2 In the current collecting assembly provided in the embodiment of the present application, the pole 2 and the current collecting member 1 are not only directly electrically connected, but also indirectly electrically connected through the conductive member 4, thereby increasing the connection area of ​​the electrical connection, that is, increasing the flow area between the pole 2 and the current collecting member 1, which is beneficial to improving the flow capacity of the battery cell.

[0050] In addition, please refer to Figure 1 and Figure 2The conductive member 4 and the current collector 1 are of a split structure, and the conductive member 4 and the current collector 1 can be processed separately, which is conducive to improving the convenience of processing and manufacturing the current collector 1 and the conductive member 4. Moreover, the conductive member 4 is located between the insulating member and the current collector 1, so that the insulating member and the current collector 1 can limit the conductive member 4, so that the conductive member 4 can be firmly connected between the current collector 1 and the pole 2, so as to achieve the effect of increasing the flow area.

[0051] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the conductive member and the pole are of a split structure. By making the conductive member 4 and the pole 2 of a split structure, the conductive member 4 and the pole 2 can be processed separately, which is convenient for processing and manufacturing the conductive member 4 and the pole 2; the conductive member 4 and the pole 2 can also be installed on the current collector 1 separately, which is convenient for assembling the conductive member 4 and the pole 2.

[0052] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the conductive member 4 and the pole 2 are arranged along the radial direction of the pole 2. With such a structural form, the conductive member 4 is electrically connected to the outer peripheral surface of the pole 2, and the outer peripheral surface of the pole 2 is fully utilized, which is conducive to improving the current capacity of the battery cell. Moreover, the conductive member 4 and the pole 2 are arranged along the radial direction of the pole 2, so that the conductive member 4 and the pole 2 as a whole occupy a smaller space in the axial direction a of the pole, which is conducive to improving the compactness of the battery cell structure.

[0053] Please refer to Figure 1 and Figure 2 In the embodiment of the present application, generally, the battery cell may include a shell, the current collector 1, the insulating member and the conductive member 4 may be arranged in the shell, a mounting through hole may be formed on the shell, the pole 2 may be inserted into the mounting through hole, the axial direction of the mounting through hole is also the axial direction a of the pole, the end face of the first end 21 of the pole is conductively connected to the current collector 1, such as conductive bonding, welding or conductive contact, etc., and the second end may extend to the outside of the shell through the mounting through hole. In the embodiment of the present application, the first end 21 of the pole and the second end of the pole 2 are respectively the two ends of the pole 2 in its own axial direction.

[0054] Please refer to Figure 1 and Figure 2The current collector 1 in the embodiment of the present application has the same meaning as that generally understood by those skilled in the art. Generally, the current collector 1 can be a sheet structure, the thickness direction of the current collector 1 is the axial direction a of the pole, the material of the current collector 1 can include at least one of copper, aluminum and tin, etc., the side of the first side of the current collector 1 can be conductively connected to the end face of the first end 21 of the pole, and the side of the second side of the current collector 1 opposite to the first side can be welded to at least two pole ears, so that the current collector 1 is electrically connected to the at least two pole ears, so that the current on at least two pole ears can be collected on the current collecting disk and introduced into the pole 2 through the current collecting disk. In the embodiment of the present application, the first side and the second side of the current collector 1 are the opposite sides of the current collector 1 in the thickness direction of itself.

[0055] Please refer to Figure 1 and Figure 2 In the embodiment of the present application, it can be understood that the insulating member is located on the side of the current collector 1 close to the pole 2, that is, the side of the current collector 1 in conductive contact with the end surface of the first end 21 of the pole faces the insulating member.

[0056] Please refer to Figure 1 and Figure 2 In the embodiment of the present application, it can be understood that the conductive member 4 is located between the insulating member and the current collector 1, that is, along the axial direction a of the pole, the insulating member, the conductive member 4 and the current collector 1 are arranged in sequence, and the insulating member insulates the conductive member 4 and the current collector 1 from the shell. In some embodiments of the present application, the side of the insulating member away from the current collector 1 can abut against the inner surface of the shell. In this way, it is conducive to improving the stability of the installation of the insulating member.

[0057] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the insulating member may be made of materials such as polyethylene terephthalate, etc. This is conducive to improving the insulation effect of the insulating member.

[0058] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the insulating member includes at least two sub-insulators 3, at least two sub-insulators 3 are detachably connected, and at least two sub-insulators 3 are arranged along the circumference of the pole 2. Since at least two sub-insulators 3 are detachably connected, the current collector 1 and the pole ear can be welded first, and then the insulating member is assembled, so that the weldable area of ​​the current collector 1 is increased, and the area of ​​the current collector 1 originally blocked by the insulating member can also be welded, thereby improving the current carrying capacity. At the same time, in such a structural form, at least two sub-insulators 3 can be installed on the current collector 1 in sequence, which is conducive to improving the convenience of installing the insulating member.

[0059] Please refer to Figure 1 and Figure 2In some embodiments of the present application, at least two sub-insulators 3 are arranged along the circumference of the pole 2 to form a closed annular structure, that is, the insulating member is sleeved on the pole 2. This is conducive to improving the insulation effect of the insulating member.

[0060] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the sub-insulator 3 extends along the circumference of the pole 2, and the lengths of at least two sub-insulators 3 in the extension direction are equal. This is conducive to improving the insulation effect of the insulating member. In some embodiments of the present application, along the circumference of the pole 2, at least two sub-insulators 3 are rotationally symmetrical structures. This facilitates the processing and manufacturing of the sub-insulator 3.

[0061] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the number of the sub-insulators 3 is two. In this way, the convenience of installing the insulating member and the insulating effect of the insulating member can be taken into account.

[0062] Please refer to Figure 2 , Figure 3 and Figure 4 In some embodiments of the present application, a mounting hole 11 is formed on the current collector 1, the depth direction of the mounting hole 11 is the axial direction a of the pole, the end face of the first end 21 of the pole abuts against the axial end face of the mounting hole 11, and a mounting boss 6 is fixed on the end face of the first end 21 of the pole, and the mounting boss 6 is embedded in the mounting hole 11. In this way, the pole 2 and the current collector 1 are mutually limited in the radial direction of the pole 2 by the mounting boss 6 and the mounting hole 11, which is conducive to improving the stability of the installation of the pole 2 and the current collector 1. It should be explained that in the embodiment of the present application, the mounting boss 6 does not belong to the pole 2.

[0063] Please refer to Figure 2 , Figure 4 and Figure 5 In some embodiments of the present application, a current block 5 is sleeved on the second end of the pole 2. This is beneficial to improving the current capacity of the battery.

[0064] Please refer to Figure 6 , Figure 7 and Figure 8 In some embodiments of the present application, the conductive member 4 may be a solid block structure. For example, the conductive member 4 may be a rectangular parallelepiped, a pentagonal prism, a hexagonal prism, a cylinder, or a composite shape formed by a combination of the above shapes. In this way, the conductive member 4 has a higher strength and a larger flow area. Of course, in some embodiments of the present application, the conductive member 4 may be a hollow block structure or a sheet structure.

[0065] Please refer to Figure 6 , Figure 7 and Figure 8In some embodiments of the present application, the material of the conductive member 4 may include at least one of copper, aluminum, and tin, etc. In this way, the conductive member 4 has a strong conductivity.

[0066] Please refer to Figure 3 , Figure 7 and Figure 8 In some embodiments of the present application, along the axial direction a of the pole, the end faces of the two ends of the conductive member 4 are respectively in contact with the insulating member and the current collecting member 1. With such a structural form, in the axial direction a of the pole, the conductive member 4 can be firmly limited by the insulating member and the current collecting member 1, which is conducive to improving the stability of the installation of the conductive member 4.

[0067] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the insulating member is concave toward the side of the conductive member 4 away from the conductive member 4 to form a mounting groove 31, and the conductive member 4 is embedded in the mounting groove 31. With such a structural form, the insulating member can limit the conductive member 4 through the mounting groove 31, which is conducive to improving the stability of the installation of the conductive member 4.

[0068] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, along the axial direction a of the pole, the length of the conductive member 4 is the same as that of the mounting groove 31. This is conducive to improving the compactness of the structure.

[0069] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the mounting groove 31 is engaged with the conductive member 4 along the circumference of the pole 2. In this way, the insulating member can limit the conductive member 4 through the mounting groove 31 in the circumference of the pole 2, which is conducive to improving the stability of the installation of the conductive member 4, and the conductive member 4 can reliably contact the outer peripheral surface of the pole 2, which is conducive to improving the current carrying capacity. In some embodiments of the present application, the mounting groove 31 is engaged with the conductive member 4 along the radial direction of the pole 2. In this way, the insulating member can limit the conductive member 4 through the mounting groove 31 in the radial direction of the pole 2, which is conducive to improving the stability of the installation of the conductive member 4, and the conductive member 4 can reliably contact the outer peripheral surface of the pole 2, which is conducive to improving the current carrying capacity.

[0070] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10In some embodiments of the present application, the conductive member 4 is interference-fitted with the mounting groove 31. With such a structural form, the conductive member 4 is closely matched with the mounting groove 31, the conductive member 4 is fixed on the insulating member, the installation of the conductive member 4 is relatively stable, and it can reliably contact the outer peripheral surface of the pole 2, which is conducive to improving the current carrying capacity.

[0071] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the installation groove 31 passes through one end of the insulating member toward the pole 2, so that the installation groove 31 is formed with a avoidance opening 312, and the conductive member 4 is conductively connected to the pole 2 through the avoidance opening 312. In such a structural form, along the arrangement direction of the installation groove 31 and the pole 2, the installation groove 31 extends to the pole 2, and the matching area between the conductive member 4 and the installation groove 31 is large, which is conducive to improving the stability of the installation of the conductive member 4. In addition, the conductive member 4 is conductively connected to the pole 2 through the avoidance opening 312, which is also conducive to making the conductive member 4 and the pole 2 have a larger connection area, which is conducive to improving the current carrying capacity.

[0072] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, along the arrangement direction of the mounting groove 31 and the pole 2, the mounting groove 31 can be a through groove or a semi-through groove, and the avoidance opening 312 is easier to manufacture and has a larger profile, so that the conductive member 4 and the outer peripheral surface of the pole 2 can have a larger contact area.

[0073] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, along the axial direction a of the pole, the ratio of the length of the portion of the insulating member opposite to the conductive member 4 to the length of the conductive member 4 is 1 to 7:1. Such a structural form can take into account both the strength of the insulating member and the contact area between the conductive member 4 and the pole 2, thereby taking into account both the reliability of the battery cell and the current carrying capacity of the battery cell.

[0074] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the number of the conductive members 4 is at least two, and at least two conductive members 4 are arranged along the circumference of the pole 2. Such a structural form makes the connection area between the pole 2 and the conductive member 4 larger, which is beneficial to the current carrying capacity of the battery cell.

[0075] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the insulating member is concave toward the side of the current collector 1 away from the current collector 1 to form a slot 331, and the current collector 1 is formed with a convex block 121 corresponding to the slot 331, and the convex block 121 is embedded in the slot 331. In this structural form, the insulating member and the current collector 1 are installed together through the convex block 121 and the slot 331, which is conducive to improving the stability of the installation of the insulating member and the current collector 1, and is conducive to improving the insulation effect of the insulating member and improving the reliability of the battery cell.

[0076] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, along the circumference of the pole 2, the slot 331 is engaged with the protrusion 121. In this way, the current collector 1 can limit the insulating member in the circumference of the pole 2 through the slot 331 and the protrusion 121, which is conducive to improving the stability of the installation of the insulating member. In some embodiments of the present application, along the radial direction of the pole 2, the slot 331 is engaged with the protrusion 121. In this way, the current collector 1 can limit the insulating member in the radial direction of the pole 2 through the slot 331 and the protrusion 121, which is conducive to improving the stability of the installation of the insulating member.

[0077] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the insulating member is sleeved on the pole 2, and the insulating member protrudes outward along the radial direction of the pole 2 to form at least one first lug 33, and the slot 331 is formed on the first lug 33. It can be understood that the first lug 33 has a strong deformation ability, so that the slot 331 is formed on the first lug 33, which facilitates the installation of the slot 331 and the protrusion 121. In some embodiments of the present application, the installation slot 31 is located on the side of the first lug 33 close to the pole 2.

[0078] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the insulating member includes a main body and a first lug 33. The main body is annular, the pole 2 is located in the inner circle of the main body, and the first lug 33 is formed in the outer circle of the main body. In this way, the structure of the insulating member is relatively simple and the processing and manufacturing is relatively convenient.

[0079] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10In some embodiments of the present application, the number of the slots 331 is at least two, and at least two slots 331 are arranged at intervals along the circumference of the pole 2. The number of the protrusions 121 is at least two, and the protrusions 121 are arranged in a one-to-one correspondence with the slots 331. Such a structural form increases the matching area between the insulating member and the current collecting member 1, which is conducive to improving the stability of the installation of the insulating member. In some embodiments of the present application, a plurality of first lugs 33 are formed on the insulating member, and at least two first lugs 33 are arranged in a circumferentially spaced relationship with the pole 2. At least two first lugs 33 are arranged in a one-to-one correspondence with at least two slots 331.

[0080] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, an escape space is formed between two adjacent first lugs 33, and along the axial direction a of the pole, the portion of the current collector 1 opposite to the escape space is welded to the pole lug. In this way, personnel can weld the current collector 1 to the pole lug through the escape space, which is conducive to improving the convenience of processing and manufacturing.

[0081] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 On this basis, at least two slots 331 are arranged at intervals along the circumference of the pole 2. Such a structural form is conducive to making the contact force between each part of the insulating member arranged along the circumference of the pole 2 and the current collector 1 more uniform, which is conducive to improving the stability of the installation of the insulating member.

[0082] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 On this basis, in some embodiments of the present application, the slot 331 is located at the outer edge of the insulating member along the radial direction of the pole 2. Such a structural form is conducive to improving the stability of the installation of the insulating member and the current collecting member 1.

[0083] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, at least two slots 331 are formed on the same sub-insulator 3, and the slots 331 are clearance-matched with the protrusions 121. Such a structural form is conducive to providing convenience for the sub-insulator 3 to be installed on the current collector 1.

[0084] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10In some embodiments of the present application, along the axial direction a of the pole, the ratio between the length of the portion of the insulating member opposite to the protrusion 121 and the length of the protrusion 121 is 1 to 7:1. In this way, the strength of the insulating member and the reliability of the installation of the insulating member can be taken into account.

[0085] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, along the axial direction a of the pole, the length of the protrusion 121 is the same as that of the slot 331. This is beneficial to improving the compactness of the current collecting assembly.

[0086] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the current collector 1 protrudes outwardly along the radial direction of the pole 2 to form a second lug 12, and the protrusion 121 is formed on the second lug 12. It can be understood that the second lug 12 has a strong deformation ability, so that the installation of the protrusion 121 and the slot 331 is more convenient.

[0087] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some embodiments of the present application, the second lug 12 is formed with a third lug 13 protruding along the axial direction a of the pole, and the third lug 13 is used for welding with the pole lug. In this way, the third lug 13 has a strong deformation ability, so that the thermal stress generated during the welding process of the current collector 1 and the pole 2 is not easily transmitted to the welding position of the current collector 1 and the pole lug, and the thermal stress during the welding process of the current collector 1 and the pole lug is not easily transmitted to the welding position of the current collector 1 and other pole lugs, which is conducive to improving the reliability of the battery cell.

[0088] Please refer to Fig.11 , Fig.12 , Fig.13 In some embodiments of the present application, two adjacent sub-insulators 3 each include a connection surface, the connection surface extends along the axial direction a of the pole, a limiting boss 34 is formed on the connection surface, and the limiting bosses 34 of the two adjacent sub-insulators 3 are arranged along the axial direction a of the pole and are in contact with each other. With such a structural form, in the axial direction a of the pole, the two adjacent sub-insulators 3 are mutually limited by the limiting bosses 34, which is conducive to improving the reliability of the installation of the insulating member.

[0089] Please refer to Fig.11 , Fig.12 , Fig.13In some embodiments of the present application, the sub-insulator 3 extends along the circumferential direction of the pole 2, and the connection surface is formed on the end surface of the sub-insulator 3 at one end in the extension direction thereof, and the connection surfaces of two adjacent insulating members abut against each other. With such a structural form, the two adjacent sub-insulators 3 are mutually limited in the circumferential direction of the pole 2, which is conducive to improving the reliability of the installation of the sub-insulator 3, and the two adjacent sub-insulators 3 are connected more closely, which is conducive to improving the insulation effect.

[0090] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10 On this basis, in some embodiments of the present application, the current collecting part 1 and the insulating part can be assembled in the following manner: first, a sub-insulating part 3 is installed on the current collecting part 1, and the slot 331 on the sub-insulating part 3 is matched with the corresponding protrusion 121, and then another sub-insulating part 3 is placed on the current collecting part 1, and the insulating part is slid along the extension direction of the current collecting part 1. During the sliding process, the slot 331 on the sub-insulating part 3 is matched with the corresponding protrusion 121, and the two connecting surfaces belonging to the two sub-insulating parts 3 are abutted.

[0091] Please refer to Fig.11 , Fig.12 , Fig.13 In some embodiments of the present application, the end faces of both ends of the sub-insulator 3 in its own extension direction are formed with connection surfaces. Such a structural form is conducive to further improving the reliability of the installation of the insulating member and the insulation effect.

[0092] Please refer to Fig.11 , Fig.12 , Fig.13 In some embodiments of the present application, the limiting boss 34 includes a first limiting boss and a second limiting boss, the first limiting boss and the second limiting boss are respectively located at the two ends of the sub-insulator 3, the side of the first limiting boss and the side of the second limiting boss are both in contact with the adjacent sub-insulator 3, the first limiting boss is located on the side of the adjacent sub-insulator 3 close to the collector disk, and the second limiting boss is located on the side of the adjacent sub-insulator 3 away from the collector disk. In such a structural form, the sub-insulator 3 is limited in two opposite directions along the axial direction a of the pole by the first limiting boss and the second limiting boss, which is conducive to improving the stability of the installation of the sub-insulator 3. Moreover, the sub-insulator 3 is respectively formed with the first limiting boss and the second limiting boss at both ends in its own extension direction, so that the shapes of at least two sub-insulators 3 can be the same, which is convenient for the processing and manufacturing of at least two sub-insulators 3.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or at least two embodiments or examples in a suitable manner.

[0094] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A current collecting assembly, It is characterized in that include: A current collector (1) for electrically connecting to the tabs of a battery cell; A pole (2), the pole (2) being conductively connected to the current collecting member (1); An insulating member, located on a side of the current collecting member (1) close to the pole (2) along the axial direction of the pole (2); at least one conductive member (4) having a separate structure from the current collecting member (1), the conductive member (4) being located between the insulating member and the current collecting member (1), and the conductive member (4) being conductively connected to the pole (2) and the current collecting member (1); Along the axial direction of the pole (2), end surfaces at both ends of the conductive member (4) are in contact with the insulating member and the current collecting member (1) respectively; The insulating member is concave on one side facing the conductive member (4) in a direction away from the conductive member (4) to form a mounting groove (31), and the conductive member (4) is embedded in the mounting groove (31); The installation groove (31) penetrates one end of the insulating member toward the pole (2), so that the installation groove (31) forms a relief opening (312), and the conductive member (4) contacts the outer peripheral surface of the pole (2) through the relief opening (312) to form a conductive connection; The number of the conductive members (4) is at least two, and at least two of the conductive members (4) are arranged along the circumference of the pole (2).

2. The current collecting assembly according to claim 1, It is characterized in that The conductive member (4) and the pole (2) are of a split structure.

3. The current collecting assembly according to claim 1, It is characterized in that The conductive member (4) and the pole (2) are arranged along the radial direction of the pole (2).

4. The current collecting assembly according to claim 3, It is characterized in that The conductive member (4) is interference-fitted with the mounting groove (31).

5. The current collecting assembly according to claim 3, It is characterized in that Along the axial direction of the pole (2), the ratio between the length of the portion of the insulating member that is opposite to the conductive member (4) and the length of the conductive member (4) is 1-7:

1.

6. The current collecting assembly according to claim 1, It is characterized in that The insulating member is concave on one side facing the current collecting member (1) in a direction away from the current collecting member (1), forming a slot (331); the current collecting member (1) is formed with a protrusion (121) corresponding to the slot (331); the protrusion (121) is embedded in the slot (331).

7. The current collecting assembly according to claim 6, It is characterized in that The insulating member is sleeved on the pole (2), the insulating member protrudes outwards in the radial direction of the pole (2), and is formed with at least one first lug (33), and the clamping groove (331) is formed on the first lug (33).

8. The current collecting assembly according to claim 6, It is characterized in that The number of the card slots (331) is at least two, and the at least two card slots (331) are arranged at intervals along the circumference of the pole (2); the number of the protrusions (121) is at least two, and the protrusions (121) are arranged in a one-to-one correspondence with the card slots (331).

9. The current collecting assembly according to claim 8, It is characterized in that Along the radial direction of the pole (2), the clamping groove (331) is located at the outer edge of the insulating component.

10. The current collecting assembly according to any one of claims 1 to 9, It is characterized in that The insulating member comprises at least two sub-insulating members (3), the at least two sub-insulating members (3) are detachably connected, and the at least two sub-insulating members (3) are arranged along the circumference of the pole (2).

11. The current collecting assembly according to claim 10, It is characterized in that Each of the two adjacent sub-insulators (3) comprises a connection surface, the connection surface extending along the axial direction of the pole (2), a limiting boss (34) being formed on the connection surface, and the limiting bosses (34) of the two adjacent sub-insulators (3) are arranged along the axial direction of the pole (2) and are in limiting contact.

12. A battery cell, It is characterized in that A current collecting assembly comprising any one of claims 1 to 11.

13. A battery pack, It is characterized in that include: A box body is formed with a receiving space; The battery cell of claim 12, wherein the number of the battery cells is at least two, and at least two of the battery cells are disposed in the accommodating space.

14. An electrical device, It is characterized in that Includes the battery pack according to claim 13 or the battery cell according to claim 12.

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