Current collection assembly, battery cell, battery pack, and electric device

Abstract

A current collection assembly (10), a battery cell (50), a battery pack (60), and an electric device (70), relating to the technical field of batteries. The current collection assembly (10) comprises a current collector (1), a pole (2), an insulating member (7), and at least one conductive member (4). The current collector (1) is used for being electrically connected to tabs of a battery cell (50); the pole (2) is conductively connected to the current collector (1); in an axial direction (a) of the pole, the insulating member (7) is located on the side of the current collector (1) close to the pole (2); the conductive member (4) and the current collector (1) are of a split-type structure; the conductive member (4) is located between the insulating member (7) and the current collector (1); and the conductive member (4) is conductively connected to the pole (2) and the current collector (1). The current collection assembly (10) is used for collecting current, and the current flowing capacity of the battery cell (50) can be improved.

Description

A current collecting assembly, a battery monomer, a battery pack and a power utilization device

[0001] The present application claims priority to the Chinese patent application No. 202411067797.7, filed on August 6, 2024, and entitled "A current collecting assembly, a battery monomer, a battery pack and a power utilization device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a current collecting assembly, a battery monomer, a battery pack and a power utilization device. BACKGROUND

[0003] In the related art, the connection area between the pole and the current collecting disc of the battery monomer is small, which leads to poor overcurrent performance of the battery monomer. SUMMARY

[0004] The present application provides a current collecting assembly, a battery monomer, a battery pack and a power utilization device, which can improve the overcurrent performance of the battery monomer.

[0005] In a first aspect, the present application provides a current collecting assembly, which comprises a current collecting member, a pole, an insulating member and at least one conductive member. The current collecting member is configured to be electrically connected to the tab of the battery monomer. The pole is in conductive connection with the current collecting member. The insulating member is located on the side of the current collecting member close to the pole along the axial direction of the pole. The conductive member is in a split structure with the current collecting member, and is located between the insulating member and the current collecting member. The conductive member is in conductive connection with the pole and the current collecting member.

[0006] Optionally, the conductive member is in a split structure with the pole.

[0007] Optionally, the conductive member and the pole are arranged along the radial direction of the pole.

[0008] Optionally, the end faces of the two ends of the conductive member are respectively in abutment with the insulating member and the current collecting member along the axial direction of the pole.

[0009] Optionally, the side of the insulating member facing the conductive member is concave in the direction away from the conductive member, and forms a mounting groove, and the conductive member is embedded in the mounting groove.

[0010] Optionally, the conductive member is in interference fit with the mounting groove.

[0011] Optionally, the mounting groove penetrates one end of the insulating member facing the pole, so that the mounting groove forms an avoiding opening, and the conductive member is in conductive connection with the pole through the avoiding opening.

[0012] Optionally, the length of the part of the insulating member opposite to the conductive member along the axial direction of the pole and the length of the conductive member are in a ratio of 1:1 to 7:1.

[0013] Optionally, the number of the conductive members is at least two, and the at least two conductive members are arranged along the circumference direction of the pole.

[0014] Optionally, the side of the insulating member facing the current collecting member is concave in the direction away from the current collecting member, and a clamping groove is formed, and the insulating member is provided with a protrusion corresponding to the clamping groove, and the protrusion is embedded in the clamping groove.

[0015] Optionally, along the radial direction of the pole, the clamping groove is located at the outer edge of the insulating member.

[0016] Optionally, the insulating member is sleeved on the pole, and the insulating member is convex outward along the radial direction of the pole, and at least one first lug is formed, and the clamping groove is formed on the first lug.

[0017] Optionally, the number of the clamping grooves is at least two, and the at least two clamping grooves are arranged along the circumference direction of the pole, and the number of the protrusions is at least two, and the protrusions are arranged one by one corresponding to the clamping grooves.

[0018] Optionally, the insulating member comprises at least two sub-insulating members, and the at least two sub-insulating members are detachably connected, and the at least two sub-insulating members are arranged along the circumference direction of the pole.

[0019] Optionally, each of the adjacent two sub-insulating members comprises a connecting surface extending along the axial direction of the pole, and a limiting boss is formed on the connecting surface, and the limiting bosses of the adjacent two sub-insulating members are arranged along the axial direction of the pole and abut against each other.

[0020] In a second aspect, the application provides a battery monomer, which comprises the current collecting assembly provided in the first aspect of the application.

[0021] In a third aspect, the application provides a battery pack, which comprises a box body and the battery monomer provided in the second aspect of the application. The box body forms an accommodating space, and the number of the battery monomers is at least two, and the at least two battery monomers are arranged in the accommodating space.

[0022] In a fourth aspect, the application provides a power consumption device, which comprises the battery pack provided in the third aspect of the application or the battery monomer provided in the second aspect of the application.

[0023] The current collecting assembly provided in the application not only directly electrically connects the pole and the current collecting member, but also indirectly electrically connects them through the conductive member, thereby increasing the connection area of the electrical connection, i.e., increasing the current passing area between the pole and the current collecting member, which is conducive to improving the current passing capacity of the battery monomer.

[0024] In addition, in the present application, the conductive piece and the current collecting piece are in a split structure, and the conductive piece and the current collecting piece can be processed respectively, which is conducive to improving the convenience of processing and manufacturing the current collecting piece and the conductive piece. Moreover, the conductive piece is located between the insulating piece and the current collecting piece, so that the insulating piece and the current collecting piece can limit the conductive piece, and the conductive piece can be stably connected between the current collecting piece and the pole, thereby improving the overcurrent area.

[0025] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0027] Fig. 1 is a structural schematic diagram of a current collecting assembly in some embodiments of the present application;

[0028] Fig. 2 is a sectional view at B-B in Fig. 1;

[0029] Fig. 3 is a structural schematic diagram of a current collecting disc in some embodiments of the present application;

[0030] Fig. 4 is a structural schematic diagram of a pole in some embodiments of the present application;

[0031] Fig. 5 is a structural schematic diagram of an overcurrent block in some embodiments of the present application;

[0032] Fig. 6 is a structural schematic diagram of an insulating piece in some embodiments of the present application;

[0033] Fig. 7 is another structural schematic diagram of an insulating piece in some embodiments of the present application;

[0034] Fig. 8 is a structural schematic diagram of a conductive piece in some embodiments of the present application;

[0035] Fig. 9 is a structural schematic diagram of the cooperation between the insulating piece and the current collecting piece in some embodiments of the present application;

[0036] Fig. 10 is another structural schematic diagram of the cooperation between the insulating piece and the current collecting piece in some embodiments of the present application;

[0037] Fig. 11 is a structural schematic diagram of the insulating piece in some embodiments of the present application;

[0038] Fig. 12 is a sectional view at C-C in Fig. 11;

[0039] Fig. 13 is an enlarged view of D in Fig. 12;

[0040] Fig. 14 is a schematic diagram of a battery cell in some embodiments of the present application;

[0041] FIG. 15 is a schematic view of a battery pack in some embodiments of the present application;

[0042] FIG. 16 is a schematic view of an electrical device in some embodiments of the present application.

[0043] Reference signs: 10 - current collecting assembly; 1 - current collecting member; 11 - mounting hole; 12 - second lug; 121 - protrusion; 13 - third lug; 2 - pole; 21 - first end of pole; 3 - sub-insulating member; 31 - mounting groove; 312 - avoiding opening; 33 - first lug; 331 - clamping groove; 34 - limiting boss; 4 - conductive member; 5 - overcurrent block; 6 - mounting boss; 7 - insulating member; 50 - battery monomer; 51 - shell; 52 - electrode assembly; 60 - battery pack; 61 - box body; 62 - containing space; 70 - electrical device; a - axial direction of pole. DETAILED DESCRIPTION

[0044] Embodiments of the present application will be described in detail below with reference to the drawings, in which like reference numerals refer to like elements throughout. The embodiments described below are examples of the present application and are not intended to limit the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0046] The terms "first", "second" in the description of the present application and claims can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "at least two" is two or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0047] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0048] In the description of the present application, it needs to be understood that the terms "mounting", "connection", "connection" should be understood broadly unless otherwise specified and limited, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] As shown in FIG. 16, the present application provides a kind of electric equipment 70, and electric equipment 70 includes battery pack 60.In the present application, the category of electric equipment 70 can be various, illustratively, electric equipment 70 can refer to vehicle, ship or aircraft and the like electric equipment 70.The category of vehicle can be various, illustratively, it can be sedan, off-road vehicle, sport utility vehicle (SUV), passenger car, truck, pickup or motor home and the like.

[0050] As shown in FIG. 15, the battery pack 60 provided by the present application includes a box 61 and a battery cell 50.The box 61 is formed with a containing space 62;The number of battery cells 50 is at least two, and at least two battery cells 50 are arranged in the containing space 62.The battery cell 50 provided by the present application can be various, illustratively, it can be lithium ion battery, sodium ion battery, sodium lithium ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium ion battery, nickel-hydrogen battery, nickel-cadmium battery, lead-acid battery and the like, which is not limited by the present application.In addition, according to the classification according to the packaging mode, the battery cell 50 in the present application can be cylindrical battery cell 50 and the like.

[0051] Please refer to FIG. 1, FIG. 2 and FIG. 14, the battery monomer 50 provided by the embodiment of the application includes the current collecting assembly 10, the current collecting assembly 10 is used for collecting current. The current collecting assembly 10 includes the current collecting piece 1, the pole 2, the insulating piece 7 and at least one conductive piece 4. Wherein, the current collecting piece 1 is used for being electrically connected with the tab of the battery monomer 50;The pole 2 is electrically connected with the current collecting piece 1;Along the axial direction a of the pole, the insulating piece 7 is located at the side of the current collecting piece 1 close to the pole 2;The conductive piece 4 is a split structure with the current collecting piece 1, the conductive piece 4 is located between the insulating piece 7 and the current collecting piece 1, and the conductive piece 4 is electrically connected with the pole 2 and the current collecting piece 1.

[0052] Please refer to FIG. 1 and FIG. 2, the current collecting assembly 10 provided by the embodiment of the application, the pole 2 is not only directly electrically connected with the current collecting piece 1, but also indirectly electrically connected through the conductive piece 4, which increases the connection area of the electrical connection, that is, increases the flow area between the pole 2 and the current collecting piece 1, which is beneficial to improve the flow capacity of the battery monomer 50.

[0053] In addition, please refer to FIG. 1 and FIG. 2, the conductive piece 4 and the current collecting piece 1 are a split structure, the conductive piece 4 and the current collecting piece 1 can be machined respectively, which is beneficial to improve the convenience of machining and manufacturing of the current collecting piece 1 and the conductive piece 4. Moreover, the conductive piece 4 is located between the insulating piece 7 and the current collecting piece 1, so that the insulating piece 7 and the current collecting piece 1 can limit the conductive piece 4, so that the conductive piece 4 can be stably connected between the current collecting piece 1 and the pole 2, and the effect of increasing the flow area is achieved.

[0054] Please refer to FIG. 1 and FIG. 2, in some embodiments of the application, the conductive piece 4 and the pole 2 are a split structure. By making the conductive piece 4 and the pole 2 a split structure, the conductive piece 4 and the pole 2 can be machined respectively, which is convenient for machining and manufacturing of the conductive piece 4 and the pole 2;The conductive piece 4 and the pole 2 can also be respectively installed on the current collecting piece 1, which is convenient for assembly of the conductive piece 4 and the pole 2.

[0055] Please refer to FIG. 1 and FIG. 2, in some embodiments of the application, the conductive piece 4 and the pole 2 are arranged along the radial direction of the pole 2. Such a structure form makes the outer peripheral surface of the conductive piece 4 and the pole 2 electrically connected, and the outer peripheral surface of the pole 2 is fully utilized, which is beneficial to improve the flow capacity of the battery monomer 50. Moreover, the conductive piece 4 and the pole 2 are arranged along the radial direction of the pole 2, so that the conductive piece 4 and the pole 2 occupy a smaller space in the axial direction a of the pole as a whole, which is beneficial to improve the compactness of the structure of the battery monomer 50.

[0056] Please refer to FIG. 1, FIG. 2, FIG. 4 and FIG. 14, in the embodiments of the present application, generally, the battery monomer 50 can include a shell 51 and an electrode assembly 52, the current collector 1, the insulating piece 7 and the conductive piece 4 can be arranged in the shell 51, the electrode assembly 52 and the conductive piece 4 are electrically connected, the mounting through hole can be formed on the shell 51, the pole 2 can be arranged in 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 in conductive connection with the current collector 1, such as conductive bonding, welding or conductive contact and the like, the second end can extend to the outside of the shell through the mounting through hole. In the embodiments of the present application, the first end 21 of the pole and the second end of the pole 2 are respectively two ends of the pole 2 in the axial direction of the pole.

[0057] Please refer to FIG. 1 and FIG. 2, the current collector 1 in the embodiments of the present application has the same meaning as 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 for making the current collector 1 can include at least one of copper, aluminum and tin and the like, the side surface of the first side of the current collector 1 can be in conductive connection with the end face of the first end 21 of the pole, the side surface of the second side opposite to the first side of the current collector 1 can be welded with at least two tabs, so that the current collector 1 is electrically connected with the at least two tabs, in this way, the current on the at least two tabs can be collected to the current collector 1 and introduced into the pole 2 through the current collector 1. In the embodiments of the present application, the first side and the second side of the current collector 1 are respectively two opposite sides of the current collector 1 in the thickness direction of the current collector 1.

[0058] Please refer to FIG. 1 and FIG. 2, in the embodiments of the present application, it can be understood that the insulating piece 7 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 face of the first end 21 of the pole faces the insulating piece 7.

[0059] Please refer to FIG. 1 and FIG. 2, in the embodiments of the present application, it can be understood that the conductive piece 4 is located between the insulating piece 7 and the current collector 1, that is, along the axial direction a of the pole, the insulating piece 7, the conductive piece 4 and the current collector 1 are arranged in sequence, the insulating piece 7 insulates the conductive piece 4 and the current collector 1 from the shell. In some embodiments of the present application, the side of the insulating piece 7 away from the current collector 1 can be in abutment with the inner surface of the shell. In this way, it is beneficial to improve the stability of the installation of the insulating piece 7.

[0060] Please refer to FIG. 1 and FIG. 2, in some embodiments of the present application, the insulating piece 7 can be made of polyethylene terephthalate and the like. In this way, it is beneficial to make the insulation effect of the insulating piece 7 higher.

[0061] Please refer to FIG. 1 and FIG. 2, in some embodiments of the present application, the insulating piece 7 comprises at least two sub-insulating pieces 3, the at least two sub-insulating pieces 3 are detachably connected, and the at least two sub-insulating pieces 3 are arranged along the circumference of the pole 2. Since the at least two sub-insulating pieces 3 are detachably connected, the current collector 1 and the tab can be welded in priority, and then the insulating piece 7 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 piece 7 can also be welded, thereby improving the overcurrent capacity. At the same time, in this structure, the at least two sub-insulating pieces 3 can be sequentially mounted on the current collector 1, which is conducive to improving the convenience of installing the insulating piece 7.

[0062] Please refer to FIG. 1 and FIG. 2, in some embodiments of the present application, the at least two sub-insulating pieces 3 are arranged along the circumference of the pole 2 to form a closed annular structure, that is, the insulating piece 7 is sleeved on the pole 2. In this way, it is conducive to improving the insulation effect of the insulating piece 7.

[0063] Please refer to FIG. 1 and FIG. 2, in some embodiments of the present application, the sub-insulating piece 3 extends along the circumference of the pole 2, and the lengths of the at least two sub-insulating pieces 3 in the extension direction are equal. In this way, it is conducive to improving the insulation effect of the insulating piece 7. In some embodiments of the present application, the at least two sub-insulating pieces 3 are rotationally symmetrical structures along the circumference of the pole 2. In this way, it is convenient for the processing and manufacturing of the sub-insulating piece 3.

[0064] Please refer to FIG. 1 and FIG. 2, in some embodiments of the present application, the number of the sub-insulating pieces 3 is two. In this way, the convenience of installing the insulating piece 7 and the insulation effect of the insulating piece 7 can be considered.

[0065] Please refer to FIG. 2, FIG. 3 and FIG. 4, in some embodiments of the present application, the current collector 1 is formed with a mounting hole 11, 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, the 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 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 the mounting boss 6 does not belong to the pole 2 in the embodiments of the present application.

[0066] Please refer to FIG. 2, FIG. 4 and FIG. 5, in some embodiments of the present application, the second end of the pole 2 is sleeved with an overcurrent block 5. In this way, it is conducive to improving the overcurrent capacity of the battery.

[0067] Please refer to FIG. 6, FIG. 7 and FIG. 8, in some embodiments of the present application, the conductive piece 4 can be a solid block structure. For example, the conductive piece 4 can be a cuboid, a pentagonal prism, a hexagonal prism, a cylinder, and a composite shape formed by combining the above shapes, etc. In this way, the conductive piece 4 has high strength and large flow area. Of course, in some embodiments of the present application, the conductive piece 4 can be a hollow block structure or a sheet structure, etc.

[0068] Please refer to FIG. 6, FIG. 7 and FIG. 8, in some embodiments of the present application, the material of the conductive piece 4 can include at least one of copper, aluminum, tin, etc. In this way, the conductive piece 4 has strong conductivity.

[0069] Please refer to FIG. 3, FIG. 7 and FIG. 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 piece 4 respectively abut against the insulating piece 7 and the current collecting piece 1. With this structure, the conductive piece 4 can be stably positioned by the insulating piece 7 and the current collecting piece 1 in the axial direction a of the pole, which is beneficial to improve the stability of the installation of the conductive piece 4.

[0070] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the side of the insulating piece 7 facing the conductive piece 4 is recessed away from the conductive piece 4, forming a mounting groove 31, and the conductive piece 4 is embedded in the mounting groove 31. With this structure, the insulating piece 7 can limit the conductive piece 4 through the mounting groove 31, which is beneficial to improve the stability of the installation of the conductive piece 4.

[0071] Please refer to FIG. 7, FIG. 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 piece 4 is the same as that of the mounting groove 31. In this way, it is beneficial to improve the compactness of the structure.

[0072] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, along the circumferential direction of the pole 2, the mounting groove 31 is clamped with the conductive piece 4. In this way, the insulating piece 7 can limit the conductive piece 4 through the mounting groove 31 in the circumferential direction of the pole 2, which is beneficial to improve the stability of the installation of the conductive piece 4, and the conductive piece 4 can reliably contact the outer peripheral surface of the pole 2, which is beneficial to improve the flow capacity. In some embodiments of the present application, along the radial direction of the pole 2, the mounting groove 31 is clamped with the conductive piece 4. In this way, the insulating piece 7 can limit the conductive piece 4 through the mounting groove 31 in the radial direction of the pole 2, which is beneficial to improve the stability of the installation of the conductive piece 4, and the conductive piece 4 can reliably contact the outer peripheral surface of the pole 2, which is beneficial to improve the flow capacity.

[0073] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the conductive piece 4 is in interference fit with the mounting groove 31. In this structure, the conductive piece 4 is tightly fitted with the mounting groove 31, the conductive piece 4 is fixed on the insulating piece 7, the installation of the conductive piece 4 is more stable, and the conductive piece 4 can reliably contact the outer circumferential surface of the pole 2, which is conducive to improving the overcurrent capacity.

[0074] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the mounting groove 31 penetrates one end of the insulating piece 7 towards the pole 2, so that the mounting groove 31 is formed with a avoiding opening 312, and the conductive piece 4 is electrically connected with the pole 2 through the avoiding opening 312. In this structure, along the arrangement direction of the mounting groove 31 and the pole 2, the mounting groove 31 extends to the pole 2, the fitting area of the conductive piece 4 and the mounting groove 31 is larger, which is conducive to improving the stability of the installation of the conductive piece 4. In addition, the conductive piece 4 is electrically connected with the pole 2 through the avoiding opening 312, which is also conducive to making the conductive piece 4 and the pole 2 have a larger connection area, which is conducive to improving the overcurrent capacity.

[0075] Please refer to FIG. 7, FIG. 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 half-through groove, the avoiding opening 312 is convenient to process and manufacture, and has a larger profile, so that the conductive piece 4 and the outer circumferential surface of the pole 2 can have a larger contact area.

[0076] Please refer to FIG. 7, FIG. 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 part of the insulating piece 7 opposite to the conductive piece 4 and the length of the conductive piece 4 are in a ratio of 1:1 to 7:1. In this structure, the strength of the insulating piece 7 and the contact area of the conductive piece 4 and the pole 2 can be considered, so as to consider the reliability of the battery monomer 50 and the overcurrent capacity of the battery monomer 50.

[0077] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the number of the conductive piece 4 is at least two, and the at least two conductive pieces 4 are arranged along the circumferential direction of the pole 2. In this structure, the connection area of the pole 2 and the conductive piece 4 is larger, which is conducive to improving the overcurrent capacity of the battery monomer 50.

[0078] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the side of the insulating piece 7 towards the current collector 1 is concave away from the current collector 1, and is formed with a clamping groove 331, the insulating piece 7 is formed with a protrusion 121 corresponding to the clamping groove 331, and the protrusion 121 is embedded in the clamping groove 331. In this structure, the insulating piece 7 and the current collector 1 are installed together through the protrusion 121 and the clamping groove 331, which is conducive to improving the stability of the installation of the insulating piece 7 and the current collector 1, improving the insulation effect of the insulating piece 7, and improving the reliability of the battery monomer 50.

[0079] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the clamping groove 331 is clamped with the protrusion 121 along the circumference of the pole column 2. In this way, the current collector 1 can limit the insulation piece 7 in the circumference of the pole column 2 through the clamping groove 331 and the protrusion 121, which is conducive to improving the stability of the installation of the insulation piece 7. In some embodiments of the present application, the clamping groove 331 is clamped with the protrusion 121 along the radial direction of the pole column 2. In this way, the current collector 1 can limit the insulation piece 7 in the radial direction of the pole column 2 through the clamping groove 331 and the protrusion 121, which is conducive to improving the stability of the installation of the insulation piece 7.

[0080] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the insulation piece 7 is sleeved on the pole column 2, and the insulation piece 7 protrudes outward along the radial direction of the pole column 2, and at least one first lug 33 is formed, and the clamping groove 331 is formed on the first lug 33. It can be understood that the first lug 33 has strong deformation ability, so that the clamping groove 331 is formed on the first lug 33, which is convenient for the installation of the clamping groove 331 and the protrusion 121. In some embodiments of the present application, the installation groove 31 is located on the side of the first lug 33 close to the pole column 2.

[0081] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the insulation piece 7 includes a body part and a first lug 33, the body part is annular, the pole column 2 is located at the inner circle of the body part, and the first lug 33 is formed at the outer circle of the body part. In this way, the structure of the insulation piece 7 is relatively simple, and the processing and manufacturing are relatively convenient.

[0082] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the number of clamping grooves 331 is at least two, at least two clamping grooves 331 are arranged in the circumferential direction of the pole column 2, and the number of protrusions 121 is at least two, and the protrusions 121 are arranged one by one with the clamping grooves 331. With this structure, the cooperation area of the insulation piece 7 and the current collector 1 is increased, which is conducive to improving the stability of the installation of the insulation piece 7. In some embodiments of the present application, a plurality of first lugs 33 are formed on the insulation piece 7, and at least two first lugs 33 are arranged in the circumferential direction of the pole column 2. At least two first lugs 33 are arranged one by one with at least two clamping grooves 331.

[0083] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, an avoidance space is formed between the adjacent two first lugs 33, and the part of the current collector 1 opposite to the avoidance space is welded with the pole lug along the axial direction a of the pole column. In this way, the operator can weld the current collector 1 and the pole lug together through the avoidance space, which is conducive to improving the convenience of processing and manufacturing.

[0084] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, on the basis of which, at least two clamping grooves 331 are arranged along the circumferential direction of the pole column 2. With this structure, the contact force of each part of the insulating piece 7 arranged along the circumferential direction of the pole column 2 on the current collecting piece 1 is more uniform, which is conducive to improving the stability of the installation of the insulating piece 7.

[0085] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, on the basis of which, in some embodiments of the present application, the clamping groove 331 is located at the outer edge of the insulating piece 7 along the radial direction of the pole column 2. With this structure, the stability of the installation of the insulating piece 7 and the current collecting piece 1 is improved.

[0086] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, at least two clamping grooves 331 are formed on the same sub-insulating piece 3, and the clamping groove 331 is in clearance fit with the protrusion 121. With this structure, the convenience of the installation of the sub-insulating piece 3 on the current collecting piece 1 is provided.

[0087] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the length of the part of the insulating piece 7 opposite to the protrusion 121 along the axial direction a of the pole column is 1:1-7:1 compared with the length of the protrusion 121. In this way, the strength of the insulating piece 7 and the reliability of the installation of the insulating piece 7 can be considered.

[0088] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the length of the protrusion 121 is the same as that of the clamping groove 331 along the axial direction a of the pole column. In this way, the compactness of the current collecting assembly 10 is improved.

[0089] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the second lug 12 is protruded outward along the radial direction of the pole column 2 to form the current collecting piece 1, and the protrusion 121 is formed on the second lug 12. It can be understood that the second lug 12 has strong deformation ability, so that the installation of the protrusion 121 and the clamping groove 331 is more convenient.

[0090] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, in some embodiments of the present application, the second lug 12 is protruded along the axial direction a of the pole column to form a third lug 13, and the third lug 13 is used for welding with the pole lug. In this way, the third lug 13 has strong deformation ability, so that the thermal stress generated during the welding of the current collecting piece 1 and the pole column 2 is not easily transmitted to the position where the current collecting piece 1 is welded with the pole lug, and the thermal stress generated during the welding of the current collecting piece 1 and the pole lug is not easily transmitted to the position where the current collecting piece 1 is welded with other pole lugs, which is conducive to improving the reliability of the battery monomer 50.

[0091] Please refer to FIG. 11, FIG. 12, FIG. 13, in some embodiments of the present application, the two adjacent sub-insulating pieces 3 each include a connecting surface extending along the axial direction a of the pole, and a limiting boss 34 is formed on the connecting surface. The limiting bosses 34 of the two adjacent sub-insulating pieces 3 are arranged along the axial direction a of the pole and abut against each other. In this structure, the two adjacent sub-insulating pieces 3 are limited by the limiting bosses 34 along the axial direction a of the pole, which is conducive to improving the reliability of the installation of the insulating piece 7.

[0092] Please refer to FIG. 11, FIG. 12, FIG. 13, in some embodiments of the present application, the sub-insulating piece 3 extends along the circumferential direction of the pole 2, and the connecting surface is formed on the end surface of one end of the sub-insulating piece 3 in the extending direction thereof, and the connecting surfaces of the two adjacent sub-insulating pieces 3 abut against each other. In this structure, the two adjacent sub-insulating pieces 3 are limited in the circumferential direction of the pole 2, which is conducive to improving the reliability of the installation of the sub-insulating piece 3, and the two adjacent sub-insulating pieces 3 are connected more closely, which is conducive to improving the insulation effect.

[0093] Please refer to FIG. 7, FIG. 8, FIG. 9 and FIG. 10, on this basis, in some embodiments of the present application, the current collecting piece 1 and the insulating piece 7 can be assembled in the following manner: one sub-insulating piece 3 is first installed on the current collecting piece 1, and the clamping groove 331 on the sub-insulating piece 3 is matched with the corresponding protrusion 121, then another sub-insulating piece 3 is placed on the current collecting piece 1, and the insulating piece 7 is slid along the extending direction of the current collecting piece 1, during the sliding process, the clamping groove 331 on the sub-insulating piece 3 is matched with the corresponding protrusion 121, and the two connecting surfaces respectively belonging to the two sub-insulating pieces 3 abut against each other.

[0094] Please refer to FIG. 11, FIG. 12, FIG. 13, in some embodiments of the present application, the end surfaces of the two ends of the sub-insulating piece 3 in the extending direction thereof each form a connecting surface. In this structure, it is conducive to further improving the reliability of the installation of the insulating piece 7 and the insulation effect.

[0095] 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-insulating piece 3, the side surface of the first limiting boss and the side surface of the second limiting boss each abut against the adjacent sub-insulating piece 3, the first limiting boss is located on the side of the adjacent sub-insulating piece 3 close to the current collecting disc, and the second limiting boss is located on the side of the adjacent sub-insulating piece 3 away from the current collecting disc. In this structure, through the first limiting boss and the second limiting boss, the sub-insulating piece 3 is limited in two opposite directions along the axial direction a of the pole, which is conducive to improving the stability of the installation of the sub-insulating piece 3. Moreover, the two ends of the sub-insulating piece 3 in the extending direction thereof respectively form the first limiting boss and the second limiting boss, so that the shapes of at least two sub-insulating pieces 3 can be the same, which is conducive to the processing and manufacturing of the at least two sub-insulating pieces 3.

[0096] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" 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 present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or at least two embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the application.

Claims

1. A current collection assembly (10), wherein, The application relates to a battery tab, which comprises the following components: a current collector (1) for electrically connecting with a tab of a battery cell (50); a pole (2) which is in electrically conductive connection with the current collector (1); an insulating piece (7) which is located on the side of the current collector (1) close to the pole (2) along the axial direction (a) of the pole; at least one electrically conductive piece (4) which is in separate structure with the current collector (1) and is located between the insulating piece (7) and the current collector (1), and which is in electrically conductive connection with the pole (2) and the current collector (1). The electrically conductive piece (4) is in separate structure with the pole (2). The electrically conductive piece (4) is arranged along the radial direction of the pole (2) with the pole (2). The end faces of the electrically conductive piece (4) at both ends are respectively in abutment with the insulating piece (7) and the current collector (1) along the axial direction (a) of the pole. The side of the insulating piece (7) facing the electrically conductive piece (4) is recessed in the direction away from the electrically conductive piece (4), and is formed with a mounting groove (31), and the electrically conductive piece (4) is embedded in the mounting groove (31).

2. The current collection assembly (10) of claim 1, wherein, The electrically conductive piece (4) is in interference fit with the mounting groove (31).

3. The current collecting assembly (10) according to any one of claims 1-2, wherein, The mounting groove (31) penetrates one end of the insulating piece (7) towards the pole (2), so that the mounting groove (31) is formed with an avoiding opening (312), and the electrically conductive piece (4) is in electrically conductive connection with the pole (2) through the avoiding opening (312).

4. The current collection assembly (10) of claim 3, wherein, The length ratio of the part of the insulating piece (7) opposite to the electrically conductive piece (4) to the length of the electrically conductive piece (4) is 1:1-7:1 along the axial direction (a) of the pole.

5. The current collection assembly (10) of claim 3, wherein, The number of the electrically conductive pieces (4) is at least two, and the at least two electrically conductive pieces (4) are arranged along the circumferential direction of the pole (2).

6. The current collection assembly (10) of claim 5, wherein, The side of the insulating piece (7) facing the current collector (1) is recessed in the direction away from the current collector (1), and is formed with a clamping groove (331), and the insulating piece (7) is formed with a protruding block (121) corresponding to the clamping groove (331), and the protruding block (121) is embedded in the clamping groove (331).

7. The current collection assembly (10) of claim 5, wherein, The insulating piece (7) is sleeved on the pole (2), and the insulating piece (7) is protruded outward along the radial direction of the pole (2) and is formed with at least one first protruding lug (33), and the clamping groove (331) is formed on the first protruding lug (33).

8. The current collecting assembly (10) according to any one of claims 3-7, wherein The number of the clamping grooves (331) is at least two, and the at least two clamping grooves (331) are arranged at intervals along the circumferential direction of the pole (2), and the number of the protruding blocks (121) is at least two, and the protruding blocks (121) are arranged one by one corresponding to the clamping grooves (331).

9. The current collection assembly (10) of claim 3, wherein, The clamping grooves (331) are located at the outer edge of the insulating piece (7) along the radial direction of the pole (2).

10. The current collection assembly (10) of claim 1, wherein, The insulating piece (7) comprises at least two sub-insulating pieces (3), the at least two sub-insulating pieces (3) are detachably connected, and the at least two sub-insulating pieces (3) are arranged along the circumferential direction of the pole (2).

11. The current collection assembly (10) of claim 10, wherein, ​ 12. The current collection assembly (10) of claim 10, wherein, ​ 13. The current collection assembly (10) of claim 12, wherein, ​ 14. The current collecting assembly (10) according to any one of claims 1 to 13, wherein ​ 15. The current collection assembly (10) of claim 14, wherein, Each of the two adjacent sub-insulating pieces (3) comprises a connecting surface extending along the axial direction (a) of the pole, and a limiting boss (34) is formed on the connecting surface. The limiting bosses (34) of the two adjacent sub-insulating pieces (3) are arranged along the axial direction (a) of the pole and abut against each other.

16. A battery cell (50), wherein The current collecting assembly (10) according to any one of claims 1-15.

17. A battery pack (60), wherein The battery pack (60) according to claim 17 or the battery cell (50) according to claim 16. The battery pack (60) comprises: A box body (61) is formed with an accommodation space (62); 18. An electrical device (70) wherein, The battery cell (50) according to claim 16, wherein the number of the battery cell (50) is at least two, and each of the at least two battery cells (50) is arranged in the accommodation space (62). The battery pack (60) according to claim 17 or the battery cell (50) according to claim 16.

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