Integrated busbar and battery pack

Abstract

The utility model provides an integrated busbar and a battery pack, the integrated busbar comprises an injection molding isolation plate, a positive output stage, a negative output stage and an aluminum bar assembly, and the positive output stage, the negative output stage and the aluminum bar assembly are installed on the injection molding isolation plate; the aluminum bar assembly is arranged between the positive output stage and the negative output stage; the aluminum bar assembly comprises a plurality of series aluminum bars which are sequentially arranged in the direction from the positive output stage to the negative output stage and are connected with the positive output stage and the negative output stage so as to form a connecting part between the positive output stage and the negative output stage. The series aluminum row is used for connecting the plurality of cylindrical cells in parallel, so that the plurality of cylindrical cells are connected in parallel through the series aluminum row, a wiring harness is prevented from being adopted for connection, meanwhile, the wiring harness is not used in the battery pack, and the occupied space of the battery pack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to an integrated busbar and a battery pack. Background Art

[0002] With the development of science and technology, battery packs are used as electronic components of new energy and are used to supply power to components. Battery packs are used for voltage collection and temperature collection.

[0003] In the prior art, the existing battery pack includes an injection molded isolation plate, a positive output stage, a negative output stage and multiple cylindrical battery cells, the positive output stage is installed on the injection molded isolation plate; the negative output stage is installed on the injection molded isolation plate and is on one side of the positive output stage; at this time, the positive output stage and the negative output stage are connected through a wiring harness, the injection molded isolation plate is connected to the multiple cylindrical battery cells through the wiring harness, and are aggregated to the connector through the wiring harness to form a small module; the small modules are then connected in series and in parallel through the wiring harness, resulting in the existing battery pack occupying a large space. Utility Model Content

[0004] The utility model aims to provide an integrated busbar and battery pack, by installing a positive output stage, a negative output stage and an aluminum busbar assembly on an injection molded isolation plate; the aluminum busbar assembly is arranged between the positive output stage and the negative output stage; the aluminum busbar assembly comprises a plurality of series-connected aluminum busbars, the plurality of series-connected aluminum busbars are sequentially arranged along the direction from the positive output stage toward the negative output stage, and the positive output stage and the negative output stage are connected to form a connecting component between the positive output stage and the negative output stage; the series-connected aluminum busbars are used to connect a plurality of cylindrical cells in parallel, thereby connecting a plurality of cylindrical cells in parallel through the series-connected aluminum busbars, thereby avoiding the use of a wiring harness for connection, and at the same time, no wiring harness is used in the battery pack, thereby reducing the occupied space of the battery pack.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An integrated busbar is applied to a battery pack, and the integrated busbar comprises:

[0007] Injection molded insulation panels;

[0008] A forward output stage is mounted on the injection molded isolation plate; the forward output stage is used to connect to the forward connection end;

[0009] A negative output stage is installed on the injection molded isolation plate and is located on one side of the positive output stage; the negative output stage is used to connect to the negative connection terminal;

[0010] An aluminum bar assembly is mounted on the injection molded isolation plate and is disposed between the positive output stage and the negative output stage; the aluminum bar assembly comprises a plurality of aluminum bars connected in series, the plurality of aluminum bars connected in series are sequentially arranged along the direction from the positive output stage to the negative output stage, and connect the positive output stage and the negative output stage to form a connecting component between the positive output stage and the negative output stage; the aluminum bars connected in series are used to connect a plurality of cylindrical cells in parallel.

[0011] Optionally, the injection molded isolation plate is provided with a plurality of first positioning grooves;

[0012] The plurality of aluminum bars connected in series are all mounted on the injection molded isolation plate, and the plurality of aluminum bars connected in series are staggered and arranged at intervals along the direction from the positive output stage to the negative output stage;

[0013] In the direction from the positive output stage to the negative output stage, the staggered portion between two adjacent series-connected aluminum bars is arranged relative to the first positioning groove.

[0014] Optionally, the series-connected aluminum bars include a first aluminum bar positive electrode and a first aluminum bar negative electrode;

[0015] The first aluminum bar positive electrode and the first aluminum bar negative electrode are an integrally connected structure, and serve as the negative electrode and the positive electrode of different cylindrical battery cells.

[0016] Optionally, the first aluminum bar positive electrode and the first aluminum bar negative electrode form an aluminum bar group;

[0017] There are multiple groups of aluminum bar groups, and two adjacent groups of aluminum bar groups are an integrated structure; the multiple groups of aluminum bar groups are arranged in sequence along the length direction of the series-connected aluminum bar and act on corresponding cylindrical battery cells.

[0018] Optionally, a plurality of the series-connected aluminum bars constitute an aluminum bar module, and the aluminum bar module has a plurality of;

[0019] The aluminum bar assembly includes a cross-connected series aluminum bar, which is located between two adjacent aluminum bar modules and is staggered with the series-connected aluminum bars of the two adjacent aluminum bar modules.

[0020] Optionally, the cross-connected series aluminum bar includes a second aluminum bar positive electrode and a second aluminum bar negative electrode; the second aluminum bar positive electrode and the second aluminum bar negative electrode are an integrally connected structure;

[0021] The positive electrode of the second aluminum bar is arranged alternately with the negative electrode of the first aluminum bar of the series-connected aluminum bar of the aluminum bar module;

[0022] The negative electrode of the second aluminum bar is arranged alternately with the positive electrode of the first aluminum bar of the series-connected aluminum bar of another aluminum bar module.

[0023] Optionally, the jumper series aluminum bar further includes a jumper body, and two ends of the jumper body are respectively connected to the second aluminum bar positive electrode and the second aluminum bar negative electrode;

[0024] The bridging body is installed on the injection-molded isolation plate, and the bridging body is provided with an arched bracket portion.

[0025] Optionally, the forward output stage includes a forward copper plate and a forward output aluminum bar; the forward output aluminum bar is welded to the forward copper plate and electrically connected to the forward copper plate; the forward output aluminum bar is used to connect multiple cylindrical cells in parallel;

[0026] The negative output stage comprises a negative copper plate and a negative output aluminum bar; the negative output aluminum bar is welded to the negative copper plate and electrically connected to the negative copper plate; the negative output aluminum bar is used to connect multiple cylindrical battery cells in parallel.

[0027] Optionally, the integrated busbar also includes a flexible circuit board, which extends sequentially along the direction of the positive output stage toward the negative output stage. The flexible circuit board is located on one side of the multiple series-connected aluminum bars and electrically connects the multiple series-connected aluminum bars; the flexible circuit board is connected to a voltage measurement terminal or a temperature measurement terminal.

[0028] A battery pack comprises the integrated busbar.

[0029] Compared with the prior art, the beneficial effects of the utility model are:

[0030] The utility model provides an integrated busbar and battery pack, wherein the positive output stage is mounted on an injection molded isolation plate; the positive output stage is used to connect to the positive connection end; the negative output stage is mounted on the injection molded isolation plate and is located on one side of the positive output stage; the negative output stage is used to connect to the negative connection end; an aluminum busbar assembly is mounted on the injection molded isolation plate and is arranged between the positive output stage and the negative output stage; the aluminum busbar assembly comprises a plurality of aluminum busbars connected in series, the plurality of aluminum busbars connected in series are sequentially arranged along the direction from the positive output stage to the negative output stage, and the positive output stage and the negative output stage are connected to form a connection component between the positive output stage and the negative output stage; the aluminum busbars connected in series are used to connect multiple A cylindrical battery cell is formed by installing a positive output stage, a negative output stage and an aluminum bar assembly on an injection-molded isolation plate; the aluminum bar assembly is arranged between the positive output stage and the negative output stage; the aluminum bar assembly includes a plurality of series-connected aluminum bars, and the plurality of series-connected aluminum bars are arranged in sequence from the positive output stage to the negative output stage, and the positive output stage and the negative output stage are connected to form a connecting component between the positive output stage and the negative output stage; the series-connected aluminum bars are used to connect a plurality of cylindrical battery cells in parallel, thereby connecting a plurality of cylindrical battery cells in parallel through the series-connected aluminum bars, thereby avoiding the use of a wiring harness for connection. At the same time, no wiring harness is used in the battery pack, thereby reducing the space occupied by the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0032] Figure 1 A schematic diagram of an integrated busbar according to an embodiment of the present application is shown.

[0033] Figure 2 A front view of an integrated busbar according to an embodiment of the present application is shown.

[0034] Figure 3 A schematic diagram of an injection-molded isolation plate of an integrated busbar according to an embodiment of the present application is shown.

[0035] Figure 4 A schematic diagram of a forward output stage of an integrated busbar according to an embodiment of the present application is shown.

[0036] Figure 5 A schematic diagram of a negative output stage of an integrated busbar according to an embodiment of the present application is shown.

[0037] Figure 6 A schematic diagram of series-connected aluminum bars of an integrated busbar according to an embodiment of the present application is shown.

[0038] Figure 7 A schematic diagram of cross-connected series aluminum bars of an integrated busbar according to an embodiment of the present application is shown.

[0039] Figure 8 A schematic diagram of a flexible circuit board with an integrated busbar according to an embodiment of the present application is shown.

[0040] Reference numerals

[0041] 100. Integrated busbar;

[0042] 10. Injection molded isolation plate; 10a. First positioning groove;

[0043] 20. Forward output stage; 21. Forward copper plate; 22. Forward output aluminum busbar;

[0044] 30. Negative output stage; 31. Negative copper plate; 32. Negative output aluminum bar;

[0045] 40, aluminum bar assembly; 41, series aluminum bar; 411, first aluminum bar positive electrode; 412, first aluminum bar negative electrode; 42, cross-connected series aluminum bar; 421, second aluminum bar positive electrode; 422, second aluminum bar negative electrode; 423, cross-connected main body; 4231, arched bracket part;

[0046] 50. Flexible circuit board. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] Please refer to the attached Figures 1 to 8 The embodiment of the present application provides an integrated busbar 100, which is applied to a battery pack. The integrated busbar 100 includes an injection-molded isolation plate 10, a positive output stage 20, a negative output stage 30 and an aluminum busbar assembly 40. The positive output stage 20, the negative output stage 30 and the aluminum busbar assembly 40 are all located on the upper side of the injection-molded isolation plate 10, and the aluminum busbar assembly 40 is located between the positive output stage 20 and the negative output stage 30.

[0049] In the embodiment of the present application, the injection molded isolation plate 10 serves as a supporting component of the integrated busbar 100 and is used to support the positive output stage 20 , the negative output stage 30 and the aluminum busbar assembly 40 .

[0050] In the embodiment of the present application, the forward output stage 20 is arranged on the upper side of the injection molded isolation plate 10, and the forward output stage 20 is installed on the injection molded isolation plate 10; the forward output stage 20 is used to dock with the forward docking end, so that the integrated busbar 100 can be docked with the forward docking end through the forward output stage 20.

[0051] The forward output stage 20 includes a forward copper plate 21 and a forward output aluminum bus 22; the forward copper plate 21 is connected to the injection molded isolation plate 10, and the forward output aluminum bus 22 is welded to the positive copper plate 21 and electrically connected to the positive copper plate 21; the forward output aluminum bus 22 is used to connect multiple cylindrical battery cells in parallel, so that the forward output stage 20 can be electrically connected to the negative electrodes of the multiple cylindrical battery cells through the forward output aluminum bus 22.

[0052] In the embodiment of the present application, the negative output stage 30 is installed on the injection molded isolation plate 10 and is located on the rear side of the positive output stage 20; the negative output stage 30 is used to dock with the negative docking end, so that the integrated busbar 100 can be docked with the negative docking end through the negative output stage 30.

[0053] The negative output stage 30 includes a negative copper plate 31 and a negative output aluminum bar 32; the negative copper plate 31 is connected to the injection molded isolation plate 10, and the negative output aluminum bar 32 is welded to the negative copper plate 31 and electrically connected to the negative copper plate 31; the negative output aluminum bar 32 is used to connect multiple cylindrical battery cells in parallel, so that the negative output stage 30 can be electrically connected to the positive electrodes of the multiple cylindrical battery cells through the negative output aluminum bar 32.

[0054] In the embodiment of the present application, the aluminum bar assembly 40 is installed on the injection molded isolation plate 10 and is arranged between the positive output stage 20 and the negative output stage 30; the aluminum bar assembly 40 includes a plurality of series-connected aluminum bars 41, and the plurality of series-connected aluminum bars 41 are arranged in sequence along the direction from the positive output stage 20 toward the negative output stage 30, and connect the positive output stage 20 and the negative output stage 30 to constitute a connecting component between the positive output stage 20 and the negative output stage 30; the series-connected aluminum bars 41 are used to connect a plurality of cylindrical battery cells in parallel.

[0055] At this time, the positive output stage 20, the negative output stage 30 and the aluminum bar assembly 40 are installed on the injection molded isolation plate 10; the aluminum bar assembly 40 is arranged between the positive output stage 20 and the negative output stage 30; the aluminum bar assembly 40 includes a plurality of series-connected aluminum bars 41, and the plurality of series-connected aluminum bars 41 are arranged in sequence along the direction from the positive output stage 20 toward the negative output stage 30, and connect the positive output stage 20 and the negative output stage 30 to form a connecting component between the positive output stage 20 and the negative output stage 30; the series-connected aluminum bars 41 are used to connect a plurality of cylindrical cells in parallel, so that a plurality of cylindrical cells are connected in parallel through the series-connected aluminum bars 41, thereby avoiding the use of wiring harnesses for connection. At the same time, no wiring harness is used in the battery pack, thereby reducing the occupied space of the battery pack.

[0056] The injection molding isolation plate 10 is provided with a plurality of first positioning grooves 10a; the plurality of first positioning grooves 10a are staggered and spaced along the direction from the positive output stage 20 to the negative output stage 30, and a plurality of series aluminum bars 41 are installed on the injection molding isolation plate 10, and the plurality of series aluminum bars 41 are staggered and spaced along the direction from the positive output stage 20 to the negative output stage 30; in the direction from the positive output stage 20 to the negative output stage 30, the staggered parts between two adjacent series aluminum bars 41 are arranged relative to the first positioning grooves 10a, so that the series aluminum bars 41 can be positioned and connected to the injection molding isolation plate 10 through the first positioning grooves 10a, thereby ensuring the connection stability between the series aluminum bars 41 and the injection molding isolation plate 10.

[0057] The series aluminum bar 41 includes a first aluminum bar positive electrode 411 and a first aluminum bar negative electrode 412; the first aluminum bar negative electrode 412 is arranged outside the first aluminum bar positive electrode 411, and the first aluminum bar positive electrode 411 and the first aluminum bar negative electrode 412 are an integrated connection structure, so as to ensure the stability of the connection between the first aluminum bar positive electrode 411 and the first aluminum bar negative electrode 412.

[0058] The first aluminum bar positive electrode 411 and the first aluminum bar negative electrode 412 serve as the negative electrode and positive electrode of different cylindrical cells, so that the series aluminum bar 41 can be connected in parallel with multiple cylindrical cells through the first aluminum bar positive electrode 411 and the first aluminum bar negative electrode 412, thereby avoiding the use of wiring harnesses for connection.

[0059] The first aluminum bar positive electrode 411 and the first aluminum bar negative electrode 412 constitute a group of aluminum bar groups; there are multiple aluminum bar groups, and two adjacent aluminum bar groups are an integrated structure to ensure the stability of the connection between the two adjacent aluminum bar groups; the multiple aluminum bar groups are arranged in sequence along the length direction of the series aluminum bar 41, and act on the corresponding cylindrical battery cells. By arranging multiple aluminum bar groups, the number of connections of the cylindrical battery cells relative to the aluminum bar groups is increased, thereby facilitating the increase in the number of arranged cylindrical battery cells.

[0060] A plurality of series-connected aluminum bars 41 constitute an aluminum bar module, and the aluminum bar module has a plurality of aluminum bar modules; the aluminum bar assembly 40 includes a jumper-connected series aluminum bar 42, which is located between two adjacent aluminum bar modules and is staggered with the series-connected aluminum bars 41 of the two adjacent aluminum bar modules, so that the two adjacent aluminum bar modules can be connected through the jumper-connected series aluminum bar 42, thereby arranging a plurality of aluminum bar modules to increase the number of connections of the cylindrical battery cells relative to the aluminum bar modules, thereby arranging the number of cylindrical battery cells.

[0061] The cross-connected series aluminum bar 42 includes a second aluminum bar positive electrode 421 and a second aluminum bar negative electrode 422; the second aluminum bar positive electrode 421 is arranged on the outside of the second aluminum bar negative electrode 422, and the second aluminum bar positive electrode 421 and the second aluminum bar negative electrode 422 are an integrated connection structure, so as to ensure the connection stability between the second aluminum bar positive electrode 421 and the second aluminum bar negative electrode 422; the second aluminum bar positive electrode 421 and the first aluminum bar negative electrode 412 of the series aluminum bar 41 of one aluminum bar module are arranged alternately; the second aluminum bar negative electrode 422 and the first aluminum bar positive electrode 411 of the series aluminum bar 41 of another aluminum bar module are arranged alternately, so that one aluminum bar module can be connected to another aluminum bar module through the second aluminum bar positive electrode 421 and the second aluminum bar negative electrode 422, so as to facilitate the arrangement of multiple aluminum bar modules in sequence.

[0062] The jumper series aluminum bar 42 also includes a jumper body 423, which is located between the second aluminum bar positive electrode 421 and the second aluminum bar negative electrode 422. The two ends of the jumper body 423 are respectively connected to the second aluminum bar positive electrode 421 and the second aluminum bar negative electrode 422, so that the second aluminum bar positive electrode 421 can be connected to the second aluminum bar negative electrode 422 through the jumper body 423; the jumper body 423 is installed on the injection molding isolation plate 10, so that the jumper series aluminum bar 42 can be connected to the injection molding isolation plate 10 through the jumper body 423. The jumper body 423 is provided with an arched bracket portion 4231, which can increase the pressure and load bearing capacity of the jumper body 423, and can also enhance the stability and safety of the jumper body 423.

[0063] The integrated busbar 100 also includes a flexible circuit board 50, which extends sequentially from the positive output stage 20 toward the negative output stage 30. The flexible circuit board 50 is located on one side of the multiple series-connected aluminum bars 41 and is electrically connected to the multiple series-connected aluminum bars 41. The flexible circuit board 50 is connected to the voltage measuring end or the temperature measuring end so that the voltage measuring end or the temperature measuring end can be electrically connected to the multiple series-connected aluminum bars 41 through the flexible circuit board 50, thereby facilitating the voltage measuring end to implement voltage sampling, or the temperature measuring end to implement temperature sampling.

[0064] In another embodiment, a battery pack includes an integrated busbar 100 , where the integrated busbar 100 is a part of the battery pack, and the battery pack is used for voltage collection and temperature collection.

[0065] Compared with the prior art, the beneficial effects of the utility model are:

[0066] The utility model provides an integrated busbar 100 and a battery pack, wherein a positive output stage 20 is mounted on an injection molded isolation plate 10; the positive output stage 20 is used to dock with a positive docking end; a negative output stage 30 is mounted on the injection molded isolation plate 10 and is located on one side of the positive output stage 20; the negative output stage 30 is used to dock with a negative docking end; an aluminum busbar assembly 40 is mounted on the injection molded isolation plate 10 and is arranged between the positive output stage 20 and the negative output stage 30; the aluminum busbar assembly 40 includes a plurality of series-connected aluminum busbars 41, the plurality of series-connected aluminum busbars 41 are sequentially arranged along a direction from the positive output stage 20 toward the negative output stage 30, and connect the positive output stage 20 and the negative output stage 30 to form a connecting component between the positive output stage 20 and the negative output stage 30; the series-connected aluminum busbars 41 It is used to connect multiple cylindrical cells in parallel. At this time, a positive output stage 20, a negative output stage 30 and an aluminum bar assembly 40 are installed on the injection molded isolation plate 10; the aluminum bar assembly 40 is arranged between the positive output stage 20 and the negative output stage 30; the aluminum bar assembly 40 includes a plurality of series-connected aluminum bars 41, and the plurality of series-connected aluminum bars 41 are arranged in sequence along the direction from the positive output stage 20 to the negative output stage 30, and connect the positive output stage 20 and the negative output stage 30 to form a connecting component between the positive output stage 20 and the negative output stage 30; the series-connected aluminum bars 41 are used to connect multiple cylindrical cells in parallel, so that multiple cylindrical cells are connected in parallel through the series-connected aluminum bars 41, thereby avoiding the use of wiring harnesses for connection. At the same time, no wiring harness is used in the battery pack, thereby reducing the occupied space of the battery pack.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated busbar, characterized in that: Applied to a battery pack, the integrated busbar comprises: Injection molded insulation panels; A forward output stage is mounted on the injection molded isolation plate; the forward output stage is used to connect to the forward connection end; A negative output stage is installed on the injection molded isolation plate and is located on one side of the positive output stage; the negative output stage is used to connect to the negative connection terminal; An aluminum bar assembly is mounted on the injection molded isolation plate and is disposed between the positive output stage and the negative output stage; the aluminum bar assembly comprises a plurality of aluminum bars connected in series, the plurality of aluminum bars connected in series are sequentially arranged along the direction from the positive output stage to the negative output stage, and connect the positive output stage and the negative output stage to form a connecting component between the positive output stage and the negative output stage; the aluminum bars connected in series are used to connect a plurality of cylindrical cells in parallel.

2. The integrated busbar according to claim 1, characterized in that: The injection molded isolation plate is provided with a plurality of first positioning grooves; The plurality of aluminum bars connected in series are all mounted on the injection molded isolation plate, and the plurality of aluminum bars connected in series are staggered and arranged at intervals along the direction from the positive output stage to the negative output stage; In the direction from the positive output stage to the negative output stage, the staggered portion between two adjacent series-connected aluminum bars is arranged relative to the first positioning groove.

3. The integrated busbar according to claim 2, characterized in that: The series-connected aluminum bar includes a first aluminum bar positive electrode and a first aluminum bar negative electrode; The first aluminum bar positive electrode and the first aluminum bar negative electrode are an integrally connected structure, and serve as the negative electrode and the positive electrode of different cylindrical battery cells.

4. The integrated busbar according to claim 3, characterized in that: The first aluminum bar positive electrode and the first aluminum bar negative electrode form an aluminum bar group; There are multiple groups of aluminum bar groups, and two adjacent groups of aluminum bar groups are an integrated structure; the multiple groups of aluminum bar groups are arranged in sequence along the length direction of the series-connected aluminum bar and act on corresponding cylindrical battery cells.

5. The integrated busbar according to claim 2, characterized in that: A plurality of the aluminum bars connected in series form an aluminum bar module, and the aluminum bar module has a plurality of; The aluminum bar assembly includes a cross-connected series aluminum bar, which is located between two adjacent aluminum bar modules and is staggered with the series-connected aluminum bars of the two adjacent aluminum bar modules.

6. The integrated busbar according to claim 5, characterized in that: The cross-connected series aluminum bar includes a second aluminum bar positive electrode and a second aluminum bar negative electrode; the second aluminum bar positive electrode and the second aluminum bar negative electrode are an integrally connected structure; The positive electrode of the second aluminum bar is arranged alternately with the negative electrode of the first aluminum bar of the series-connected aluminum bar of the aluminum bar module; The negative electrode of the second aluminum bar is arranged alternately with the positive electrode of the first aluminum bar of the series-connected aluminum bar of another aluminum bar module.

7. The integrated busbar according to claim 6, characterized in that: The cross-connected series aluminum bar also includes a cross-connection body, and two ends of the cross-connection body are respectively connected to the positive electrode of the second aluminum bar and the negative electrode of the second aluminum bar; The bridging body is installed on the injection-molded isolation plate, and the bridging body is provided with an arched bracket portion.

8. The integrated busbar according to claim 1, characterized in that: The forward output stage comprises a forward copper plate and a forward output aluminum bar; the forward output aluminum bar is welded to the forward copper plate and electrically connected to the forward copper plate; the forward output aluminum bar is used to connect multiple cylindrical cells in parallel; The negative output stage comprises a negative copper plate and a negative output aluminum bar; the negative output aluminum bar is welded to the negative copper plate and electrically connected to the negative copper plate; the negative output aluminum bar is used to connect multiple cylindrical battery cells in parallel.

9. The integrated busbar according to claim 1, characterized in that: The integrated busbar also includes a flexible circuit board, which extends sequentially along the direction from the positive output stage to the negative output stage. The flexible circuit board is located on one side of the multiple series-connected aluminum bars and electrically connects the multiple series-connected aluminum bars. The flexible circuit board is connected to a voltage measurement terminal or a temperature measurement terminal.

10. A battery pack, characterized in that: Comprising the integrated busbar as claimed in any one of claims 1 to 9.

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