Busbar assembly and battery module

Abstract

The utility model discloses a busbar assembly and a battery module, the busbar assembly comprises a plurality of busbars, each busbar comprises a body part and a fixed stop block arranged on one side of the body part; the flexible circuit board comprises a circuit board body and a plurality of connecting pieces, and the plurality of connecting pieces are arranged on one side of the circuit board body and extend outwards; the multiple busbars are arranged on one side of the circuit board body side by side in the length direction of the circuit board body, the fixed stop block is adjacent to the upper surface of the circuit board body, a gap exists between the fixed stop block and the upper surface of the circuit board body, and the multiple connecting pieces are electrically connected with the multiple busbars in a one-to-one correspondence mode. According to the utility model, the production cost can be reduced, the weight of the battery module is reduced, the stress concentration degree of an electric connection part is reduced, and the stability of signal transmission is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery packs, and in particular to a busbar assembly and a battery module. Background Art

[0002] Flexible printed circuit board, or FPC, is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the substrate. It has advantages that other types of circuit boards cannot match, such as high wiring density, light weight, thin thickness, foldable and bendable, three-dimensional wiring, and safety performance. As cars develop towards electrification and intelligence, batteries, as the power core of electric vehicles, are a very important part of the entire electric vehicle.

[0003] With the rapid development of the electric vehicle industry, flexible circuit boards are applied to the battery module sampling circuit to form a module sampling component, which can help reduce the height and weight of the module and improve the degree of integration of the battery module.

[0004] The existing battery module is generally a battery cell connection assembly that integrates the busbar and the flexible circuit board through a busbar bracket, the flexible circuit board is installed above the busbar bracket, and the busbar is installed below the busbar bracket. However, this busbar bracket generally uses a plastic plate, resulting in a heavy weight and high production cost for the battery cell connection assembly obtained by integrating the busbar and the flexible circuit board through the busbar bracket. In addition, this busbar bracket also has the problems of high mold opening cost, long cycle, and difficulty or even inability to open the mold when the length of the busbar bracket is long, resulting in high manufacturing cost. Utility Model Content

[0005] In view of this, the utility model aims to provide a busbar assembly and a battery module, which do not require a busbar bracket, thereby reducing production costs, reducing the weight of the battery module, and reducing the space required.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a busbar assembly, comprising:

[0007] A plurality of busbars, each busbar comprising a main body and a fixed stopper disposed on one side of the main body;

[0008] A flexible circuit board, the flexible circuit board comprises a circuit board body and a plurality of connectors, wherein the plurality of connectors are arranged on one side of the circuit board body and extend outward;

[0009] A plurality of busbars are arranged side by side on one side of the circuit board body along the length direction of the circuit board body, the fixed stopper is adjacent to the upper surface of the circuit board body with a gap, and a plurality of connectors are electrically connected to the plurality of busbars in a one-to-one correspondence.

[0010] Optionally, a plurality of adhesive members are further included, each adhesive member being used to connect the flexible circuit board and the bus bar.

[0011] Optional,

[0012] The adhesive member is arranged on the lower surface of the flexible circuit board and at a position corresponding to the fixed stopper, one end of the adhesive member is connected to the circuit board body, and the other end is connected to the main body of the busbar;

[0013] And / or, the adhesive member is disposed on the upper surface of the flexible circuit board and at least a portion of it covers the upper portion of the fixed stopper.

[0014] Optionally, the bonding member is a heat-resistant tape.

[0015] Optionally, the connector is electrically connected to the upper surface of the main body of the busbar.

[0016] Optionally, the connector includes a bending portion and a first connecting portion in sequence in the direction of outward extension, and the first connecting portion is welded to the upper surface of the main body or electrically connected to the main body through a nickel sheet.

[0017] Optionally, the busbar further includes a second connecting portion, which is arranged on the other side of the main body portion opposite to the fixed stopper, and a connecting hole is provided on the connecting portion, and the connecting hole is used to be sleeved on the pole of the battery cell and fixedly connected thereto.

[0018] Optionally, two second connecting parts and two fixed stoppers are respectively provided, and are spaced apart along the length direction.

[0019] Optionally, the main body is further provided with two battery cell observation holes spaced apart along the length direction.

[0020] The embodiment of the utility model further provides a battery module, comprising:

[0021] A battery cell assembly, comprising a plurality of battery cells arranged side by side; and

[0022] As described above, the busbar assembly is extended along the arrangement direction of the battery cells and fixed on the battery cells.

[0023] The beneficial effects of the utility model are:

[0024] A plurality of busbars are arranged side by side along the length direction of the circuit board body of the flexible circuit board, a fixed stopper is arranged on the side of the busbar opposite to the circuit board body and the fixed stopper is arranged to be close to the upper surface of the circuit board body but not in contact with it, and a plurality of connectors of the flexible circuit board are electrically connected to the plurality of busbars one by one. The busbar assembly provided by the utility model can connect the busbar and the flexible circuit board without using a busbar bracket, thereby reducing the production cost, reducing the space required, and improving the compactness and lightness of the battery module; in addition, the fixed stopper is arranged on the upper surface of the circuit board body and there is a certain gap with the upper surface, and the fixed stopper can reduce the shaking of the flexible circuit board, which is conducive to reducing the degree of stress concentration at the electrical connection point, reducing the risk of fracture or damage of the connection point, thereby ensuring the stability of signal transmission and improving the performance and reliability of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings, the various parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 A schematic diagram showing the three-dimensional structure of a busbar assembly provided in one embodiment of the utility model is shown;

[0027] Figure 2 A partially enlarged schematic diagram of the structure of a busbar assembly provided by an embodiment of the utility model is shown. Figure 1 ;

[0028] Figure 3 A partially enlarged schematic diagram of the structure of a busbar assembly provided by another embodiment of the utility model is shown Figure 2 ;

[0029] Figure 4 A partially enlarged schematic diagram of a busbar assembly provided in another embodiment of the utility model is shown. Figure 3 ;

[0030] Figure 5 A structural schematic diagram showing a connection method of an adhesive member provided in an embodiment of the utility model;

[0031] Figure 6 A structural schematic diagram showing a connection method of an adhesive member provided in another embodiment of the utility model;

[0032] Figure 7 A three-dimensional structural schematic diagram of a battery module provided by an embodiment of the utility model is shown.

[0033] Description of the component numbers in the accompanying drawings:

[0034] 1. Bus, 11. Main body, 12. Fixed block, 121. Transition part, 122. Horizontal part, 13. Second connecting part, 14. Connecting hole, 15. Cell observation hole, 2. Flexible circuit board, 21. Connector, 22. Circuit board body, 23. Bending part, 24. First connecting part, 25. Nickel sheet, 26. Crimping part, 3. Adhesive part, 4. Cell. DETAILED DESCRIPTION

[0035] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0036] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention.

[0037] Unless otherwise specified, the terms used herein, including technical terms, have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include up to

[0040] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in the field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0041] like Figures 1 to 4 As shown, Figure 1 A schematic diagram of the three-dimensional structure of a busbar assembly provided in one embodiment of the utility model. Figures 2 to 4 They are partially enlarged schematic diagrams of the busbar assembly in each embodiment. In this embodiment, the busbar assembly includes:

[0042] A plurality of busbars 1, each busbar 1 comprising a main body 11 and a fixed stopper 12 disposed on one side of the main body 11;

[0043] A flexible circuit board 2, the flexible circuit board 2 comprises a circuit board body 22 and a plurality of connectors 21, wherein the plurality of connectors 21 are arranged on one side of the circuit board body 22 and extend outward;

[0044] The plurality of bus bars 1 are connected along the length direction of the circuit board body 22 (eg Figure 1 The fixed stopper 12 is adjacent to the upper surface of the circuit board body 22 with a gap therebetween, and the plurality of connectors 21 are electrically connected to the plurality of bus bars 1 in a one-to-one correspondence.

[0045] According to the technical solution provided in this embodiment, a plurality of busbars 1 are arranged side by side along the length direction of the circuit board body 22 of the flexible circuit board 2, a fixed stopper 12 is arranged on the side of the busbar 1 opposite to the circuit board body 22, and the fixed stopper 12 is arranged to be close to the upper surface of the circuit board body 22 but not in contact with it, and a plurality of connectors 21 of the flexible circuit board 2 are electrically connected to the plurality of busbars 1 in a one-to-one correspondence. The busbar assembly provided by the utility model can connect the busbar 1 and the flexible circuit board 2 without using a busbar bracket, thereby reducing the production cost, saving and reducing the space required, and improving the compactness and lightness of the battery module; in addition, the fixed stopper 12 is arranged on the upper surface of the circuit board body 22 and there is a certain gap with the upper surface, and the fixed stopper 12 can reduce the shaking of the flexible circuit board 2, which is conducive to reducing the degree of stress concentration at the electrical connection point, thereby reducing the risk of breakage or damage of the electrical connection point, thereby ensuring the stability of signal transmission and improving the performance and reliability of the battery system.

[0046] It should be noted that in the present application, there is no limitation on the number of busbars 1, which can be set accordingly according to actual conditions. When the number of battery cells changes, the number of busbars 1 can be increased or decreased.

[0047] Specifically, the busbar 1 includes a main body 11 and a fixed stopper 12, wherein the main body 11 is in a rectangular flat plate shape and is used to be fixed on the upper surface of the battery cell (such as Figure 7 The fixed stopper 12 is disposed at one side of the main body 11 and extends toward the circuit board body 22 of the flexible circuit board 2. More specifically, the fixed stopper 12 includes a transition portion 121 extending obliquely upward from the main body 11 and a horizontal portion 122 extending laterally outward from the transition portion 121, and the place where the horizontal portion 122 is connected to the transition portion 121 forms an arc.

[0048] The flexible circuit board 2 includes a circuit board body 22 in the shape of a long strip and a plurality of connectors 21 extending outward from one side of the circuit board body 22, and the number of the connectors 21 matches the number of the busbars 1. The circuit board body 22 and the connectors 21 are both provided with a plurality of electrically connected lines, and signal transmission is performed by electrically connecting the plurality of connectors 21 to the plurality of busbars 1 in a one-to-one correspondence.

[0049] The lower end surface of the horizontal portion 122 is adjacent to the upper surface of the circuit board body 22 but there is a gap. Optionally, the lower surface of the horizontal portion 122 and the upper surface of the circuit board body 22 of the flexible circuit board 2 are arranged parallel to each other but do not contact each other. In this way, the fixed stopper 12 can reduce the up and down bounce of the flexible circuit board 2, and at the same time reduce the degree of stress concentration on the electrical connection point between the connector 21 and the body 11.

[0050] In this embodiment, the flexible circuit board 2 is electrically connected to the main body 11 of the bus 1 through the connector 21 to achieve signal transmission. However, during the driving of the electric vehicle, due to shaking or jittering, stress may be concentrated on the electrical connection part between the flexible circuit board 2 and the bus 1, which may weaken the connection strength, thereby causing the connection between the flexible circuit board 2 and the bus 1 to become unreliable, and further may cause signal transmission interruption or failure. Therefore, in order to reduce the degree of stress concentration at the electrical connection point, the applicant sets the fixed block 12 above the circuit board body 22 of the flexible circuit board 1 with a certain gap, so that when shaking or jittering occurs, not only can the flexible circuit board 2 and the bus 1 maintain the same frequency vibration, reduce the degree of stress concentration at the electrical connection part, and improve the connection strength; at the same time, the vibration amplitude of the flexible circuit board 2 can be controlled to avoid indentation on the surface of the flexible circuit board 1, and the risk of damage to the insulation layer of the flexible circuit board 1, circuit damage, breakage, etc. can also be avoided.

[0051] Optionally, in order to facilitate maintenance and inspection of the electrical connection portion, the connector 21 is electrically connected to the upper surface of the main body 11 of the busbar 1 .

[0052] Furthermore, the busbar assembly further includes a plurality of adhesive members 3, each of which is used to connect the flexible circuit board 2 and the busbar 1. Thus, the reliability of the connection between the flexible circuit board 2 and the busbar 1 is improved, the stress concentration at the electrical connection point can be further solved, and it is also helpful to reduce or minimize the risk of fracture or failure of the flexible circuit board 2, ensure the reliability of signal transmission, and improve the performance and stability of the battery system.

[0053] like Figure 5 As shown, in one embodiment of the present embodiment, the adhesive member 3 is disposed on the lower surface of the flexible circuit board 2 and at a position corresponding to the fixed stopper 12 , one end of the adhesive member 3 is connected to the circuit board body 22 , and the other end is connected to the main body 11 of the bus 1 .

[0054] Specifically, in this embodiment, each adhesive member 3 is disposed on the lower surface of the flexible circuit board 21 and opposite to the fixed stopper 12, and the adhesive member 3 is connected along the connection direction between the bus 1 and the flexible circuit board 2 (such as Figure 5 The flexible circuit board 2 is provided with a plurality of fixed blocks 12, each of which is perpendicular to the length direction of the circuit board body 22 of the flexible circuit board 2 (as shown in the y direction in the figure), and one end of the fixed block 12 is connected to the circuit board body 22 of the flexible circuit board 2, and the other end is connected to the main body 11 of the bus 1. Thus, the overlapping position of the circuit board body 22 and the fixed block 12 is fixed, so that the flexible circuit board 2 and the bus 1 maintain the same frequency vibration, and the vibration amplitude of the flexible circuit board 2 is controlled, the shaking of the flexible circuit board 2 is reduced, the stress on the flexible circuit board 2 is dispersed, and the degree of stress concentration on the electrical connection point is further reduced, which helps to reduce or reduce the risk of fracture or failure of the flexible circuit board 2.

[0055] like Figure 6 As shown, in another embodiment of the present embodiment, each adhesive member 3 is disposed on the upper surface of the flexible circuit board 2 and at least a portion thereof covers the upper portion of the fixed stopper 12 .

[0056] Specifically, in this embodiment, the adhesive member 3 is arranged on the upper surface of the circuit board body 22 of the flexible circuit board 2, and at the position where the fixed stopper 12 is arranged, the adhesive member 3 is extended along the length direction of the circuit board body 22, and part of the adhesive member 3 covers the upper surface of the horizontal portion 122 of the fixed stopper, and the remaining part covers the upper surface of the circuit board body 22. Thus, the overlapping position of the circuit board body 22 and the fixed stopper 12 is fixed, so that the flexible circuit board 2 and the bus 1 maintain the same frequency vibration, and the vibration amplitude of the flexible circuit board 2 is controlled, the shaking of the flexible circuit board 2 is reduced, the stress on the flexible circuit board 2 is dispersed, and the degree of stress concentration on the electrical connection point is further reduced, which helps to reduce or reduce the risk of fracture or failure of the flexible circuit board 2.

[0057] It should be noted that the adhesive member 3 can be attached to the upper surface or the lower surface of the flexible circuit board 2 according to the process flow, and the method that is convenient for the operator to operate can be selected. In addition, the number of adhesive members 3 can be determined according to the structure and stress of the battery cell. It can be set to paste adhesive members 3 on each bus 1, or partially paste; it can also be pasted on both fixed blocks 12 of each bus 1, or only on one of the fixed blocks 12.

[0058] Furthermore, the adhesive member 3 is a heat-resistant tape, so that the bonding is firm and the price is low, which is conducive to reducing production costs.

[0059] Furthermore, if Figures 2 to 4 As shown, in this embodiment, the connector 21 includes a bending portion 23 and a first connecting portion 24 in sequence in the outward extending direction, and the first connecting portion 24 is welded to the upper surface of the main body 11 or electrically connected through a nickel sheet.

[0060] Specifically, the end of the first connection portion 24 is electrically connected to the upper surface of the body portion 11 of the busbar 1. Since there is a certain height difference between the upper surface of the circuit board body 22 of the flexible circuit board 2 and the upper surface of the body portion 11 of the busbar 1, when the first connection portion 24 is connected to the upper surface of the body portion 11, the bending portion 23 is provided to match the height of the body portion 11, thereby reducing the situation in which the flexible circuit board 2 is tilted when the first connection portion 24 is connected to the body portion 11.

[0061] like Figure 2 As shown, in one embodiment of the present embodiment, the first connection portion 24 is directly welded to the upper surface of the main body portion 11 by a welding process, thereby realizing the electrical connection between the flexible circuit board 2 and the busbar 1. This method of directly welding the flexible circuit board to the busbar can provide a more reliable electrical connection. Compared with the method of using a connecting piece, direct welding has lower contact resistance and electrical noise, and can better transmit current and signals, reduce resistance loss and energy loss; in addition, direct welding can also provide a more secure connection, which can better resist vibration and impact, which is very important for the application of batteries in vehicles and other vibration environments, and can effectively reduce the risk of loosening and disconnection.

[0062] like Figure 3 and Figure 4 As shown, in other embodiments of this embodiment, the end of the first connecting portion 24 is connected to the main body 11 of the busbar 1 through the nickel sheet 25 to achieve electrical connection between the flexible circuit board 2 and the busbar 1. Specifically, as Figure 3As shown, one end of the nickel sheet 25 can be mounted on the first connecting portion 24 by SMT (surface mount technology), and then the nickel sheet 25 and the bus 1 are welded and connected; Figure 4 As shown, one end of the nickel sheet 25 can also be connected to the first connection portion 24 through a crimp 26, and then the nickel sheet 25 and the busbar 1 are welded together. It is worth noting that Figure 3 and Figure 4 The connection method among the first connecting portion 24 , the nickel sheet 25 and the busbar 1 is only exemplified, but the present invention is not limited thereto.

[0063] Furthermore, the busbar 1 also includes a second connecting portion 13, which is arranged on the other side of the main body 11 opposite to the fixed stopper 12, and a connecting hole 14 is provided on the connecting portion, which is used to be sleeved on the pole of the battery cell and fixedly connected thereto.

[0064] Specifically, in order to make the busbar 1 fixedly connected to the pole of the battery cell, the busbar 1 is further provided with a second connecting portion 13, which is arranged in an upwardly bent shape, and a connecting hole 14 is provided in the middle of the second connecting portion 13. The connecting hole 14 is used to be sleeved on the pole and fixedly connected to the pole, for example, by hot riveting.

[0065] It is worth noting that the main body 11 , the fixed stopper 12 and the second connecting portion 13 may be integrally formed or separately formed, and the present invention does not impose any limitation thereto.

[0066] Optionally, two second connecting portions 13 and two fixed stoppers 12 are respectively provided, and are spaced apart along the length direction.

[0067] Specifically, in this embodiment, the fixed stopper 12 and the second connecting portion 13 are both relative to the central axis of the main body 11 (such as Figure 2 The first connecting portion 24 is symmetrically arranged on both sides of the main body 11 (shown by the AA line). More optionally, the first connecting portion 24 is connected to the central axis of the main body 11.

[0068] By adopting the above technical solution, the busbar 1 can be subjected to uniform force, thereby improving the flatness of the busbar 1.

[0069] Furthermore, the main body 11 is also provided with two battery cell observation holes 15 spaced apart along the length direction. Thus, the welding condition of the busbar 1 and the battery cell 4 can be observed. The two battery cell observation holes 15 are not only observation holes, but also identification holes during welding. During welding, welding is performed along the periphery of the battery cell observation holes 15. That is, the busbar 1 is fixed to the battery cell 4 by welding at the battery cell observation holes 15 to connect and fix to the upper surface of the battery cell 4.

[0070] like Figure 7 As shown, the embodiment of the utility model further provides a battery module, comprising:

[0071] A battery cell assembly, comprising a plurality of battery cells 4 arranged side by side;

[0072] As described above, the busbar assembly is extended along the arrangement direction of the battery cells 4 and fixed on the battery cells 4 .

[0073] It can be understood that a plurality of battery cells 4 are arranged in sequence to form a battery cell assembly, and the battery module includes a battery cell assembly and a bus assembly as described above. The flexible circuit board 2 is laid on the plurality of battery cells 4 along the arrangement direction of the battery cells 4, and a plurality of bus bars 1 are arranged side by side on one side of the flexible circuit board 2 along the length direction of the flexible circuit board 2, and are electrically connected to the connector 21 of the flexible circuit board 2. Each bus bar 1 is also fixedly connected to the poles of two adjacent battery cells 4. The flexible circuit board 2 is electrically connected to the bus bar 1, so that the flexible circuit board 2 can collect information such as the voltage of a single battery cell 4 and the entire battery cell assembly, the maximum temperature and the minimum temperature of the battery cell assembly, and transmit the collected information to the battery management system (BMS) of the battery pack, so that the battery management system can judge whether the battery cell assembly is in the best working state based on the received information.

[0074] According to the busbar assembly and battery module provided by the utility model, there is no need to use a busbar bracket, which can reduce the space required, thereby providing compactness and lightness of the battery pack; in addition, it also has the advantages of improving electrical connection reliability and increasing vibration and impact resistance.

[0075] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the technical field under the spirit and technical ideas disclosed in the punching hole separation inspection sample utility model shall still be covered by the claims of the present invention.

Claims

1. A busbar assembly, characterized in that: include: A plurality of busbars, each busbar comprising a main body and a fixed stopper disposed on one side of the main body; A flexible circuit board, the flexible circuit board comprising a circuit board body and a plurality of connectors, wherein the plurality of connectors are arranged on one side of the circuit board body and extend outward; The plurality of busbars are arranged side by side on one side of the circuit board body along the length direction of the circuit board body, the fixed block is adjacent to the upper surface of the circuit board body with a gap, and the plurality of connectors are electrically connected to the plurality of busbars in a one-to-one correspondence.

2. The busbar assembly according to claim 1, characterized in that: It also includes a plurality of adhesive members, each of which is used to connect the flexible circuit board and the bus bar.

3. The busbar assembly according to claim 2, characterized in that: The bonding member is disposed on the lower surface of the flexible circuit board and at a position corresponding to the fixed stopper, one end of the bonding member is connected to the circuit board body, and the other end is connected to the body portion of the busbar; And / or, the adhesive member is disposed on the upper surface of the flexible circuit board and at least a portion of it covers the upper portion of the fixed stopper.

4. The busbar assembly according to claim 2 or 3, characterized in that: The bonding piece is a heat-resistant adhesive tape.

5. The busbar assembly according to claim 1, characterized in that: The connecting member is electrically connected to the upper surface of the main body of the busbar.

6. The busbar assembly according to claim 5, characterized in that: The connecting member includes a bending portion and a first connecting portion in sequence in the direction of outward extension, and the first connecting portion is connected to the upper surface of the main body by welding or electrically connected through a nickel sheet.

7. The busbar assembly according to claim 1, characterized in that: The busbar further comprises a second connecting portion, which is arranged at the other side of the main body portion opposite to the fixed stopper, and a connecting hole is provided on the connecting portion, and the connecting hole is used to be sleeved on the pole of the battery cell and fixedly connected thereto.

8. The busbar assembly according to claim 7, characterized in that: The second connecting parts and the fixed stoppers are provided in two numbers respectively and are arranged at intervals along the length direction respectively.

9. The busbar assembly according to claim 1, characterized in that: The main body is also provided with two battery cell observation holes spaced apart along the length direction.

10. A battery module, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells arranged side by side; and The busbar assembly according to any one of claims 1 to 9, wherein the busbar assembly extends along the arrangement direction of the battery cells and is fixed on the battery cells.

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