Battery busbar, module and battery pack

Abstract

The utility model discloses a battery busbar, a module and a battery pack, the battery busbar is configured to be stacked with another battery busbar so as to connect a plurality of battery cells; the battery busbar comprises a first connecting strip and a second connecting strip. The first connecting strip is provided with a first head end and a first tail end which are opposite. The second connecting strip is provided with a second head end and a second tail end which are opposite, the second head end is connected with the first head end to form a first connecting point, and the first connecting strip and the second connecting strip are located on the same plane and intersect. Wherein the first tail end, the second tail end and the first connecting point are used for connecting three non-adjacent battery cells in the plurality of battery cells. The battery busbars are decomposed into the plurality of strip-shaped units, and the two battery busbars are laminated to connect all the battery cells, so that the stress generated by deformation and distortion of the battery busbars can be better dispersed, and the pulling welding spots are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery busbars, and in particular to a battery busbar, a module battery busbar, a module and a battery pack. BACKGROUND

[0002] Battery cells are widely used in electronic devices, power tools and energy storage devices. In the grouping process of battery cells, the design and welding of battery busbars are one of the key links. Usually, multiple battery cells are connected through battery busbars to ensure stable operation of the battery cells. The design of the battery busbar not only directly affects the safety and reliability of the welding process, but also has an important impact on the manufacturing cost.

[0003] In related technologies, the battery busbar is usually designed as a whole metal structure in the same area. Although this overall design scheme is relatively simple, in the case of a large number of series and parallel connections in the battery pack, the volume of the battery busbar will increase significantly. In the welding process, due to the downward pressure of the welding needle, the battery busbar may be deformed, resulting in uneven surface. This condition will affect the contact effect between the battery busbar and the end of the battery, thereby reducing the welding reliability, and even may adversely affect the performance and life of the battery pack. CONTENT OF THE INVENTION

[0004] One purpose of the present application is to provide a battery busbar, a module and a battery pack, which aims to solve the stability of the welding between the battery cell and the battery busbar.

[0005] To achieve the above-mentioned purpose, one scheme provided by the present application is:

[0006] A battery busbar configured to be arranged in layers with another battery busbar to connect multiple battery cells; the battery busbar comprises a first connecting strip and a second connecting strip. The first connecting strip has opposite first head end and first tail end. The second connecting strip has opposite second head end and second tail end, the second head end is connected with the first head end to form a first connecting point, the first connecting strip and the second connecting strip are located in the same plane and intersect. Wherein, the first tail end, the second tail end and the first connecting point are used to connect three non-adjacent battery cells in the multiple battery cells.

[0007] Optionally, the battery busbar further comprises a third connecting strip and a fourth connecting strip. The third connecting strip is parallel to the first connecting strip and has opposite third head end and third tail end, the third tail end is connected with the second tail end to form a second connecting point. The fourth connecting strip is parallel to the second connecting strip and has opposite fourth head end and fourth tail end, the fourth head end is connected with the third head end to form a third connecting point, and the fourth tail end is connected with the first tail end to form a fourth connecting point. Wherein, the first connecting strip, the second connecting strip, the third connecting strip and the fourth connecting strip form a rectangular structure, and the first connecting point, the second connecting point, the third connecting point and the fourth connecting point are used to connect four non-adjacent battery cells.

[0008] Optionally, the battery busbar comprises two first connecting strips and two second connecting strips, one first connecting strip, one second connecting strip, the third connecting strip and the fourth connecting strip form the rectangular structure, and the first head end of the other first connecting strip and the second head end of the other second connecting strip are both connected to the third connecting point.

[0009] Optionally, the battery busbar further comprises a third connecting strip and a fourth connecting strip. The third connecting strip is parallel to the first connecting strip and has opposite third head end and third tail end, the third head end is connected with the first connecting point. The fourth connecting strip is parallel to the second connecting strip and has opposite fourth head end and fourth tail end, the fourth head end is connected with the first connecting point. Wherein, the first connecting strip, the second connecting strip, the third connecting strip and the fourth connecting strip form a cross structure, and the first connecting point, the first tail end, the second tail end, the third tail end and the fourth tail end are used to connect five non-adjacent battery cells.

[0010] Optionally, the lengths of the first connecting strip, the second connecting strip, the third connecting strip and the fourth connecting strip are equal.

[0011] Optionally, at least one of the first head end, the first tail end, the second head end and the second tail end is provided with a through slot, and the through slot penetrates the first connecting strip and / or the second connecting strip.

[0012] Optionally, the included angle between the first connecting strip and the second connecting strip is 90°.

[0013] The application also provides a module, which comprises a plurality of battery cells and a battery busbar connected with the battery cells.

[0014] Optionally, the module comprises two battery busbars, when the shapes of the two battery busbars used for connecting the plurality of battery cells are the same, the two battery busbars are mirror-symmetrical and are arranged in a stack on the plurality of battery cells.

[0015] The application also provides a battery pack comprising a plurality of the modules, the plurality of modules are arranged and electrically connected to each other.

[0016] The application has the following beneficial effects:

[0017] By decomposing the battery busbar into a plurality of strip units and arranging the two battery busbars in a stack to connect all the battery cells, the stress generated by the deformation and distortion of the battery busbar can be better dispersed, and the pulling of the welding points can be reduced. Further, by opening the through slot, the stress concentration during welding can be further reduced, which is beneficial to reducing the influence of the unevenness of the battery busbar. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0019] Figure 1 is a schematic diagram of the battery busbar provided by the embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the assembly of the two battery busbars and the battery cells provided by the embodiment of the present application;

[0021] Figure 3 is a schematic diagram of the rectangular structure provided by the embodiment of the present application;

[0022] Figure 4 is a schematic diagram of the cross structure provided by the embodiment of the present application;

[0023] Figure 5 is a schematic diagram of the cooperation of the rectangular structure and the cross structure provided by the embodiment of the present application;

[0024] Figure 6 is a schematic diagram of the "fish" shaped battery busbar provided by the embodiment of the present application;

[0025] Figure 7 is a perspective structural diagram of the module provided by the embodiment of the present application;

[0026] Figure 8 is a top view structural diagram of the module provided by the embodiment of the present application;

[0027] Figure 9 is a schematic diagram of a battery pack provided by an embodiment of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS: 1000, battery pack; 100, module; 10, battery busbar; 11, first connecting strip; 111, first head end; 112, first tail end; 12, second connecting strip; 121, second head end; 122, second tail end; 13, third connecting strip; 131, third head end; 132, third tail end; 14, fourth connecting strip; 141, fourth head end; 142, fourth tail end; 101, first connecting point; 102, second connecting point; 103, third connecting point; 104, fourth connecting point; 105, through slot; 110, rectangular structure; 120, cross structure; 20, battery cell. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Please refer to Figures 1 to 9 , and Figure 1 is a schematic diagram of a battery busbar 10 provided by an embodiment of the present application. Figure 2 is a schematic diagram of assembly of two battery busbars 10 and battery cells 20 provided by an embodiment of the present application. Figure 3 is a schematic diagram of a rectangular structure 110 provided by an embodiment of the present application. Figure 4 is a schematic diagram of a cross structure 120 provided by an embodiment of the present application. Figure 5 is a schematic diagram of cooperation of a rectangular structure 110 and a cross structure 120 provided by an embodiment of the present application. Figure 6 is a schematic diagram of a “fish”-shaped battery busbar 10 provided by an embodiment of the present application. Figure 7 is a perspective structural diagram of a module 100 provided by an embodiment of the present application. Figure 8 is a top view structural diagram of a module provided by an embodiment of the present application. Figure 9 is a schematic diagram of a battery pack 1000 provided by an embodiment of the present application.

[0031] Please refer to Figure 1 , and Figure 2 , the present application provides a battery busbar 10, which is used for connecting a plurality of battery cells 20, so that the plurality of battery cells 20 can be connected in series or in parallel.

[0032] The battery busbar 10 is configured to be stacked with another battery busbar 10 to connect a plurality of battery cells 20. That is, one battery busbar 10 is usually used in cooperation with another battery busbar 10, the first battery busbar 10 is connected with part of the plurality of battery cells 20, the other battery busbar 10 is connected with another part of the plurality of battery cells 20, and the two battery busbars 10 are stacked and in contact with each other, thereby realizing series connection or parallel connection of the plurality of battery cells 20.

[0033] It should be noted that the battery busbar 10 is used in cooperation with another battery busbar 10, which should be understood as the battery busbar 10 can be used in cooperation with at least another battery busbar 10, that is, two battery busbars 10 can be used to connect a plurality of battery cells 20, or three, four or more battery busbars 10 can be stacked and connected with a plurality of battery cells 20. When the number of stacked battery busbars 10 is three or more, it can be understood that on the basis of stacking one battery busbar 10 with another battery busbar 10, the corresponding number of battery busbars 10 is added.

[0034] In some embodiments, the battery busbar 10 includes a first connecting strip 11 and a second connecting strip 12, the first connecting strip 11 has opposite first head end 111 and first tail end 112. The second connecting strip 12 has opposite second head end 121 and second tail end 122, the second head end 121 is connected with the first head end 111 to form a first connecting point 101, and the first connecting strip 11 and the second connecting strip 12 are located in the same plane and intersect.

[0035] Among them, the first tail end 112, the second tail end 122 and the first connecting point 101 are used to connect three non-adjacent battery cells 20 in the plurality of battery cells 20.

[0036] Optionally, the arrangement shape of the plurality of battery cells 20 is not limited, as long as the battery busbar 10 can connect the plurality of battery cells 20. Hereinafter, the plurality of battery cells 20 arranged in a rectangular array will be exemplified.

[0037] Further, please refer to Figure 2For example, the battery busbar 10 is connected with 3x2, i.e. three rows and two columns of the battery cell 20. For the convenience of description, all the battery cells 20 are labeled, the first column of the battery cells 20 is labeled from top to bottom as 1, 2, 3, and the second column is labeled from top to bottom as 4, 5, 6. The first connecting point 101 of the battery busbar 10 is connected with the battery cell 20 No. 2, the first tail end 112 is connected with the battery cell 20 No. 4, and the second tail end 122 is connected with the battery cell 20 No. 6. Another battery busbar 10 is arranged, which is mirror image of the previous battery busbar 10 and is arranged above or below the previous battery busbar 10. The first connecting point 101 of the another battery busbar 10 is connected with the battery cell 20 No. 5, the first tail end 112 is connected with the battery cell 20 No. 1, and the second tail end 122 is connected with the battery cell 20 No. 5. In this way, six battery cells 20 as a group can be connected.

[0038] It should be noted that when a battery cell 20 is not adjacent to another battery cell 20 in the upper, lower, left, and right directions, it can be understood that the two battery cells 20 are not adjacent. For example, the battery cell 20 No. 1 is adjacent to the battery cell 20 No. 2 and the battery cell 20 No. 4, but the battery cell 20 No. 1 is not adjacent to the battery cell 20 No. 5.

[0039] In this way, the battery busbar 10 can be divided into a smaller unit, so that when the battery busbar 10 is welded with the battery cell 20, the stress generated by the deformation and distortion of the battery busbar 10 can be better dispersed, the pulling of the welding points can be reduced, and the reliability between the battery busbar 10 and the battery cell 20 can be improved, so as to improve the performance and life of the battery pack 1000.

[0040] And the battery busbar 10 is not connected with two adjacent battery cells 20, so that the overlapping position of the two battery busbars 10 is not on the battery cell 20, reducing the situation that the lower battery busbar 10 is blocked at the battery cell 20, making it difficult for the upper battery busbar 10 to be welded with the battery cell 20.

[0041] Please refer to Figure 3 In some embodiments, the battery busbar 10 further comprises a third connecting strip 13 and a fourth connecting strip 14, the third connecting strip 13 is parallel to the first connecting strip 11, and has a third head end 131 opposite to a third tail end 132, the third tail end 132 is connected with the second tail end 122 to form the second connecting point 102;

[0042] The fourth connecting strip 14 is parallel to the second connecting strip 12, and has a fourth head end 141 opposite to a fourth tail end 142, the fourth head end 141 is connected with the third head end 131 to form the third connecting point 103, and the fourth tail end 142 is connected with the first tail end 112 to form the fourth connecting point 104;

[0043] Wherein, the first connecting strip 11, the second connecting strip 12, the third connecting strip 13 and the fourth connecting strip 14 form a rectangular structure 110, and the first connecting point 101, the second connecting point 102, the third connecting point 103 and the fourth connecting point 104 are used to connect four non-adjacent battery cells 20.

[0044] It should be noted that the first connecting strip 11, the second connecting strip 12, the third connecting strip 13 and the fourth connecting strip 14 do not necessarily form a rectangular structure 110 after being connected, for example, please refer to Figure 4 In some embodiments, the third connecting strip 13 and the first connecting strip 11 are located on a straight line, and the third first end 131 is connected to the first connecting point 101. The fourth connecting strip 14 and the second connecting strip 12 are located on a straight line, and the fourth first end 141 is connected to the first connecting point 101.

[0045] Wherein, the first connecting strip 11, the second connecting strip 12, the third connecting strip 13 and the fourth connecting strip 14 form a cross structure 120, and the first connecting point 101, the first tail end 112, the second tail end 122, the third tail end 132 and the fourth tail end 142 are used to connect five non-adjacent battery cells 20.

[0046] When the arrangement of the battery cell 20 is not 2x3, the rectangular structure 110 and the cross structure 120 can be used in cooperation to connect multiple battery cells 20. Taking the arrangement of the battery cell 20 as 3x3 as an example, through one rectangular structure 110 and one cross structure 120, 3x3 battery cells 20 can be connected. Wherein, 3x3 can be understood as increasing one column of battery cells 20 on the basis of 2x3, and the added battery cells 20 are set to No. 7, No. 8 and No. 9.

[0047] Please refer to Figure 5 , specifically, the rectangular structure 110 and the cross structure 120 are stacked and arranged, and the center positions of the two are coincided, and the positions of the two are not limited, that is, the rectangular structure 110 can be located above, or the cross structure 120 can be located above. The first connecting point 101 of the rectangular structure 110 is connected to the No. 2 battery cell 20, the second connecting point 102 is connected to the No. 6 battery cell 20, the third connecting point 103 is connected to the No. 8 battery cell 20, and the fourth connecting point 104 is connected to the No. 4 battery cell 20. In the cross structure 120, the first connecting point 101 is connected to the No. 5 battery cell 20, the first tail end 112 is connected to the No. 7 battery cell 20, the second tail end 122 is connected to the No. 9 battery cell 20, the third tail end 132 is connected to the No. 3 battery cell 20, and the fourth tail end 142 is connected to the No. 1 battery cell 20, so that the No. 1 to No. 9 battery cells 20 can be connected together.

[0048] On the basis of the first connecting strip 11 and the second connecting strip 12, the third connecting strip 13 and the fourth connecting strip 14 are added to connect different numbers of the battery cell 20, thereby improving the application range.

[0049] Referring to Figure 6 In some embodiments, the battery busbar 10 includes two first connecting strips 11 and two second connecting strips 12, that is, one first connecting strip 11 and one second connecting strip 12 are added on the basis of the rectangular structure 110.

[0050] One first connecting strip 11, one second connecting strip 12, the third connecting strip 13 and the fourth connecting strip 14 form the rectangular structure 110, and the first head end 111 of the other first connecting strip 11 and the second head end 121 of the other second connecting strip 12 are both connected to the third connecting point 103, so that the shape of the battery busbar 10 is roughly “fish”-shaped.

[0051] It should be noted that the “fish”-shaped battery busbar 10 can also be understood as being formed on the basis of the cross structure 120 by adding one first connecting strip 11 and one second connecting strip 12.

[0052] Referring to Figure 7 and Figure 8 The battery busbar 10 can be used in the 3×4 arranged battery cells 20, and by using two “fish”-shaped battery busbars 10 which are mirror-symmetrical and stacked, each battery cell 20 arranged in 3×4 can be contacted, so that the plurality of battery cells 20 are connected.

[0053] Correspondingly, when the battery cells 20 are arranged in 3×5, one third connecting strip 13 and one fourth connecting strip 14 are added on the basis of the “fish”-shaped battery busbar 10.

[0054] Further, when the battery cells 20 are arranged in 3×n, n>2 and is an odd number, the number of the first connecting strip 11, the second connecting strip 12, the third connecting strip 13 and the fourth connecting strip 14 of one battery busbar 10 is (n-1) / 2.

[0055] When n≥2 and is an even number, the number of the first connecting strip 11 and the second connecting strip 12 is n / 2, and the number of the third connecting strip 13 and the fourth connecting strip 14 is n / 2-1.

[0056] It should be noted that the number of columns of the battery cells 20 is not limited to three columns, but can also be other numbers, for example, when the battery cells 20 are arranged in 4×4, two first connecting strips 11 and one fourth connecting strip 14 can be added on the basis of the “fish”-shaped battery busbar 10.

[0057] When the battery cells 20 are arranged in m x n, m > 2, n > 2 and both are odd numbers, the number of the first connecting strips 11, the second connecting strips 12, the third connecting strips 13 and the fourth connecting strips 14 is [(m-1) / 2] x [(n-1) / 2].

[0058] When m > 2 is odd, n > 2 is even, the number of the first connecting strips 11 and the second connecting strips 12 is [(m-1) / 2] x (n / 2), and the number of the third connecting strips 13 and the fourth connecting strips 14 is [(m-1) / 2] x (n / 2)-1.

[0059] When m > 2 is even, n > 2 is odd, the number of the first connecting strips 11 and the fourth connecting strips 14 is (m / 2) x [(n-1) / 2], and the number of the second connecting strips 12 and the third connecting strips 13 is [(m / 2)-1] x [(n-1) / 2].

[0060] When m > 2 is even, n > 2 is odd, the number of the first connecting strips 11 and the fourth connecting strips 14 is (m / 2) x [(n-1) / 2], and the number of the second connecting strips 12 and the third connecting strips 13 is [(m / 2)-1] x [(n-1) / 2].

[0061] In some embodiments, the lengths of the first connecting strips 11, the second connecting strips 12, the third connecting strips 13 and the fourth connecting strips 14 are equal, so that when the first connecting strips 11, the second connecting strips 12, the third connecting strips 13 and the fourth connecting strips 14 form the rectangular structure 110 or the cross structure 120, the rectangular structure 110 or the cross structure 120 is center-symmetrical in shape, facilitating the connection of the battery cells 20.

[0062] In some embodiments, the angle between the first connecting strips 11 and the second connecting strips 12 is 90°. Since the third connecting strips 13 are parallel to the first connecting strips 11, and the fourth connecting strips 14 are parallel to the second connecting strips 12, the angle between any two adjacent connecting strips is 90°, and the distance between any two adjacent battery cells 20 in the rectangular array can be kept consistent.

[0063] In some embodiments, at least one of the first head end 111, the first tail end 112, the second head end 121 and the second tail end 122 is provided with a through slot 105, which penetrates the first connecting strips 11 and / or the second connecting strips 12.

[0064] The through slot 105 can reduce the impact of the unevenness of the busbar 10 caused by multi-spot welding, and better contact the busbar 10 with the end of the battery cell 20.

[0065] Optionally, the third head end 131, the third tail end 132, the fourth head end 141 and the fourth tail end 142 can also be provided with the through slot 105, so as to facilitate the better contact between the battery busbar 10 and the end of the battery cell 20.

[0066] Referring to Figure 7 The embodiment of the present application also provides a module 100, which comprises a plurality of battery cells 20 and a battery busbar 10 connected with the battery cells 20. Wherein, the plurality of battery cells 20 can be arranged in a rectangular array.

[0067] Optionally, the number of the battery busbar 10 is two, and the two battery busbars 10 are stacked and can cover all the battery cells 20, so as to connect the plurality of battery cells 20.

[0068] Referring to Figure 2 Or Figure 8 In some embodiments, when the shapes of the two battery busbars 10 used for connecting the plurality of battery cells 20 are the same, the two battery busbars 10 are mirror-symmetrical and stacked on the plurality of battery cells 20. Such arrangement can reduce the shape of the battery busbar 10 and facilitate the processing of the battery busbar 10.

[0069] Referring to FIG. 9, the embodiment of the present application also provides a battery pack 1000, which comprises a plurality of modules 100 arranged and electrically connected with each other to form the battery pack 1000. It should be noted that the number of the battery cells 20 in the plurality of modules 100 in the battery pack 1000 is not limited and can be set according to the specific situation.

[0070] For example, some of the modules 100 can be the battery cells 20 arranged in 3x4, and some can be the battery cells 20 arranged in 3x2. The specific arrangement can be determined according to the actual demand.

[0071] In summary, the embodiment of the present application provides a battery busbar 10, a module 100 and a battery pack 1000. The battery busbar 10 is divided into a plurality of strip units, and two battery busbars 10 are stacked to connect all the battery cells 20, which can better disperse the stress generated by the deformation and distortion of the battery busbar 10 and reduce the pulling of the welding points. Further, the through slot 105 can further reduce the stress concentration during welding and is beneficial to reducing the influence of the unevenness of the battery busbar 10. It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiment of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture. If the specific posture changes, the directional indications also change accordingly.

[0072] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0073] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0074] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery bus, characterized by, The battery bus is configured to be stacked with another battery bus to connect multiple battery cells; The battery bus includes: A first connecting strip, the first connecting strip having a first head end and a first tail end; The second connecting strip has a second head end and a second tail end, the second head end is connected to the first head end to form a first connection point, and the first connecting strip and the second connecting strip are located on the same plane and intersect. The first tail end, the second tail end, and the first connection point are used to connect three non-adjacent battery cells among the plurality of battery cells.

2. The battery bus of claim 1, wherein, The battery bus also includes: The third connecting strip is parallel to the first connecting strip and has a third head end and a third tail end, the third tail end being connected to the second tail end to form a second connecting point; The fourth connecting strip is parallel to the second connecting strip and has a fourth head end and a fourth tail end. The fourth head end is connected to the third head end to form a third connecting point, and the fourth tail end is connected to the first tail end to form a fourth connecting point. The first connecting strip, the second connecting strip, the third connecting strip, and the fourth connecting strip form a rectangular structure, and the first connecting point, the second connecting point, the third connecting point, and the fourth connecting point are used to connect four non-adjacent battery cells.

3. The battery bus of claim 2, wherein, The battery busbar includes two first connecting strips and two second connecting strips. One first connecting strip, one second connecting strip, the third connecting strip, and the fourth connecting strip form the rectangular structure. The first end of the other first connecting strip and the second end of the other second connecting strip are both connected to the third connecting point.

4. The battery bus of claim 1, wherein, The battery bus also includes: The third connecting strip is located on a straight line with the first connecting strip and has a third head end and a third tail end, the third head end being connected to the first connecting point; The fourth connecting strip is located on a straight line with the second connecting strip and has a fourth head end and a fourth tail end, the fourth head end being connected to the first connecting point; The first connecting strip, the second connecting strip, the third connecting strip, and the fourth connecting strip form a cross structure, and the first connecting point, the first tail end, the second tail end, the third tail end, and the fourth tail end are used to connect five non-adjacent battery cells.

5. The busbar of any one of claims 2 to 4, wherein, The first connecting strip, the second connecting strip, the third connecting strip, and the fourth connecting strip are of equal length.

6. The busbar of any one of claims 1 to 4, wherein, At least one of the first head end, the first tail end, the second head end, and the second tail end is provided with a through groove, and the through groove passes through the first connecting strip and / or the second connecting strip.

7. The busbar of any one of claims 1-4, wherein, The angle between the first connecting strip and the second connecting strip is 90°.

8. A module characterized in that, The module includes: a plurality of battery cells and a battery bus as described in any one of claims 1 to 7, wherein the battery bus is connected to the battery cells.

9. The module of claim 8, wherein The module includes two battery busbars, when the shapes of the two battery busbars used for connecting the plurality of battery cells are the same, the two battery busbars are mirror-symmetric and are stacked on the plurality of battery cells.

10. A battery pack, characterized by, The application further provides a battery module, which includes a plurality of modules as claimed in claim 8 or 9, the plurality of modules are arranged and electrically connected with each other.

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