CN216698656U - Busbar subassembly, battery module and battery package - Google Patents

Abstract

The utility model relates to the technical field of batteries, especially, relate to a busbar subassembly, battery module and battery package, be used for the battery module, the battery module includes first layer electric core group and second floor electric core group, the busbar subassembly includes first confluent piece and second confluent piece, first confluent piece and second confluent piece all are used for connecting first layer electric core group and second floor electric core group, first confluent piece extends along first predetermined direction, second confluent piece extends along second predetermined direction, first predetermined direction is the acute angle with second predetermined direction contained angle. According to the busbar subassembly, battery module and battery package of this application, the electric core utmost point post of following first predetermined direction and aliging in first layer electric core group of first layer intercommunication and the second floor electric core group of first confluence piece intercommunication, the electric core utmost point post of following the alignment of second predetermined direction in the second confluence piece intercommunication first layer electric core group and the second floor electric core group realizes gathering the purpose of the electric current of the battery module of horizontal stacking mode, provides the busbar of the battery module of horizontal stacking mode.

Description

Busbar subassembly, battery module and battery package

Technical Field

The application relates to the technical field of batteries, in particular to a bus bar assembly, a battery module and a battery pack.

Background

At present, a battery module adopts a longitudinal stacking mode, wherein the longitudinal stacking mode refers to stacking a plurality of battery cells in a mode that large faces of the battery cells (the large faces refer to the surfaces with the largest areas in the surfaces of the battery cell shells) are overlapped and stacked. Electric core piles up with vertical mode, and the electric core quantity that the battery module needs equals the number of piles up of electric core, and this makes the number of piles up of battery module too much, and the poor stability of battery module, the equipment of being not convenient for of battery module.

In order to effectively avoid the problems of large stacking layers, poor stability, difficult assembly of a battery module and the like of the longitudinal stacking mode of the battery core, the battery core can be stacked in a transverse stacking mode (namely, a mode of tiling the large surfaces of a plurality of battery cores is arranged to reduce the stacking layers of the battery core). However, the bus bars of the battery modules in the vertical stacking manner cannot be applied to the bus bars of the battery modules in the horizontal stacking manner.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a bus bar assembly, a battery module and a battery pack, so as to solve the technical problem that the bus bar of the battery module in the current longitudinal stacking manner in the prior art cannot be applied to the bus bar of the battery module in the transverse stacking manner to a certain extent.

According to the first aspect of this application provide a busbar subassembly for the battery module, the battery module includes first layer electric core group and second floor electric core group, the busbar subassembly includes first confluent piece and second confluent piece, first confluent piece with second confluent piece all is used for connecting first layer electric core group with second floor electric core group, first confluent piece extends along first predetermined direction, second confluent piece extends along second predetermined direction, both contained angles of first predetermined direction and second predetermined direction are the acute angle.

Preferably, the number of the first bus pieces is a first predetermined number, the number of the second bus pieces is a second predetermined number, and in a third predetermined direction, the first bus pieces and the second bus pieces are alternately arranged, and the first predetermined direction, the second predetermined direction and the third predetermined direction are located in the same plane.

Preferably, the busbar assembly further includes a bracket portion, and both the first bus bar and the second bus bar are disposed to the battery module via the bracket portion.

Preferably, the holder portion is formed with a first groove extending in a first predetermined direction and a second groove extending in a second predetermined direction, the first bus bar is provided to the holder portion via the first groove, and the second bus bar is provided to the holder portion via the second groove;

the two ends of the first groove are both provided with first holes penetrating through the support part, and the two ends of the second groove are both provided with second holes penetrating through the support part.

Preferably, the first bus bar is formed with a first bent portion, the first bent portion is disposed in the middle of the first bus bar, the first bent portion extends along the third predetermined direction, and the first bent portion forms a groove recessed to one side of the battery module;

the second current collecting piece is provided with a second bending part, the second bending part is arranged in the middle of the second current collecting piece, the second bending part extends along the third preset direction, and the second bending part forms a groove which is concave to one side of the battery module.

Preferably, the busbar assembly further comprises a collecting part, the collecting part extends along the third predetermined direction, the collecting part is arranged on one side of the first bus piece and one side of the second bus piece, which are away from the support part, and the first bus piece and the second bus piece are respectively communicated with the collecting part.

Preferably, the busbar assembly further comprises a connector, the connector being in communication connection with the collecting part;

the busbar subassembly still includes insulating part, insulating part set up in what gather the portion deviates from one side of battery module.

Preferably, the busbar assembly further comprises a third bus bar connecting the first layer of electric core groups and the second layer of electric core groups, the third bus bar extending along a fourth predetermined direction, and both the fourth predetermined direction and the second predetermined direction being symmetrical with respect to the first predetermined direction.

According to a second aspect of the present application, a battery module is provided, which includes the bus bar assembly according to any one of the above technical solutions, and therefore, all the advantageous technical effects of the bus bar assembly are achieved, and are not repeated herein.

According to a third aspect of the present application, a battery pack is provided, which includes the battery module according to any one of the above-mentioned technical solutions, so that all the beneficial technical effects of the bus bar assembly and the battery module are achieved, and the details are not repeated herein.

Compared with the prior art, the beneficial effect of this application is:

the application provides a busbar subassembly, through the electric core utmost point post of following first predetermined direction and aliging in first layer electric core group of first layer of confluence piece intercommunication and the second floor electric core group, through the electric core utmost point post of following the alignment of second predetermined direction in second confluence piece intercommunication first layer electric core group and the second floor electric core group to the realization collects the purpose of the electric current of the battery module of horizontal stacking mode, provides the busbar device of the battery module of horizontal stacking mode.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a bus bar assembly according to an embodiment of the present disclosure;

fig. 2 is an exploded schematic view of a bus bar assembly according to an embodiment of the present disclosure.

Reference numerals:

100-a battery module; 110-a first layer of electric core group; 120-a second layer of electric core group; 210-a collection bar; 220-a connector; 310-a first bus bar; 311-a first bending part; 320-a second bus bar; 321-a second bending part; 330-third bus bar; 400-a support plate; 410-a first slot; 420-a second slot; 430-third slot; 500-insulating board.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The bus bar assembly, the battery module 100, and the battery pack according to some embodiments of the present application are described below with reference to fig. 1 and 2.

Referring to fig. 1 and 2, a first aspect of an embodiment of the present application provides a busbar assembly for a battery module 100, the battery module 100 includes a first layer of electric core groups 110 and a second layer of electric core groups 120, the busbar assembly includes a first busbar sheet 310 and a second busbar sheet 320, the first busbar sheet 310 and the second busbar sheet 320 are used for connecting the first layer of electric core groups 110 and the second layer of electric core groups 120, the first busbar sheet 310 extends along a first predetermined direction, the second busbar sheet 320 extends along a second predetermined direction, the first predetermined direction and the second predetermined direction form an acute angle, thus, electric cores aligned along the first predetermined direction in the first layer of electric core groups 110 and the second layer of electric core groups 120 are communicated through the first busbar sheet 310, electric poles aligned along the second predetermined direction in the first layer of electric core groups 110 and the second layer of electric core groups 120 are communicated through the second busbar sheet 320, to collect the current of the battery modules 100 stacked in the lateral direction, a bus bar device of the battery modules 100 stacked in the lateral direction is provided.

In the embodiment of the present application, taking the orientation shown in fig. 1 as an example, the first predetermined direction f1 may be formed as a vertical direction, the second predetermined direction f2 may be formed as a direction inclined to the left side of the vertical direction, the third predetermined direction f3 described below may be formed as a horizontal direction, and the fourth predetermined direction described below may be formed as a direction inclined to the right side of the vertical direction. The first predetermined direction, the second predetermined direction, the third predetermined direction and the fourth predetermined direction are located in the same plane.

Preferably, as shown in fig. 1, the busbar assembly may further include a third bus bar 330, the third bus bar 330 extends along a fourth predetermined direction, the fourth predetermined direction and the second predetermined direction are both symmetrical with respect to the first predetermined direction, and thus, the busbar assembly may connect the first layer of core pack 110 and the second layer of core pack 120, in which the cell poles of the second layer of core pack 120 are inclined to the left side with respect to the cell poles of the first layer of core pack 110, via the second bus bar 320; the busbar assembly may connect the first-layer core pack 110 and the second-layer core pack 120, in which the cell poles of the second-layer core pack 120 are inclined to the right side with respect to the cell poles of the first-layer core pack 110, via the third bus bar 330.

Preferably, the number of the first bus bars 310 is a first predetermined number, the number of the second bus bars 320 is a second predetermined number, and in a third predetermined direction, the first bus bars 310 and the second bus bars 320 may be alternately arranged, so that the busbar assembly can be adapted to a situation that both the first layer of electric core groups 110 and the second group of electric core groups have a plurality of electric cores, and both the first predetermined number and the second predetermined number may be adaptively adjusted according to the number of electric cores included in both the first layer of electric core groups 110 and the second group of electric core groups.

Similarly, the number of the third bus bars 330 is a third predetermined number, and in a third predetermined direction, the first bus bars 310 and the third bus bars 330 may be alternately arranged. The third bus bar 330 and the second bus bar 320 are symmetrical with respect to the first extending direction, and the structure, the arrangement mode, etc. of the third bus bar 330 are similar to those of the second bus bar 320, and are not described again.

In this embodiment, the bus bar assembly may further include a holder plate 400, and both the first and second bus bars 310 and 320 are disposed to the battery module 100 via the holder plate 400. Preferably, the holder plate 400 may be formed as a plastic suction plate to facilitate the processing of the first and second grooves 410 and 420 described below and the integral hot press molding of the insulating plate 500 described below while securing the insulation of the battery module 100.

Preferably, as shown in fig. 2, the holder plate 400 is formed with a first groove 410 extending in a first predetermined direction and a second groove 420 extending in a second predetermined direction, the first bus bar 310 is provided to the holder plate 400 via the first groove 410, and the second bus bar 320 is provided to the holder plate 400 via the second groove 420.

Preferably, as shown in fig. 2, both ends of the first groove 410 are formed with first holes penetrating the holder plate 400, and both ends of the second groove 420 are formed with second holes penetrating the holder plate 400. The arrangement of the first and second holes provides a passageway through the support plate 400 for the poles of the cells to connect the first and second bus bars 310, 320 to the cells.

Similarly, the holder plate 400 may be further formed with a third groove 430 extending in the fourth extending direction, and both ends of the third groove 430 may be formed with third holes penetrating the holder plate 400.

Preferably, as shown in fig. 2, the first current collecting piece 310 is formed with a first bent portion 311, the first bent portion 311 is disposed at the middle of the first current collecting piece 310, the first bent portion 311 extends along the third predetermined direction, and the first bent portion 311 forms a groove recessed toward one side of the battery module 100. The first bending portion 311 provides a pre-deformation space for the first bus bar 310, so that the first bus bar 310 is more easily deformed along with the deformation of the battery cell, thereby preventing the battery cell from being deformed during the operation of the battery module 100, and causing poor contact between the battery cell and the first bus bar 310.

Similarly, the second bending portion 321 is formed on the second flow converging piece 320, the third bending portion 330 is formed on the third flow converging piece 330, and the structure and arrangement principle of the second bending portion 321 and the third bending portion are similar to those of the first bending portion 311, and are not described again.

In this embodiment, the bus bar assembly may further include a collecting bar 210, the collecting bar 210 extends along the third predetermined direction, the collecting bar 210 may be disposed on a side of both the first bus bar 310 and the second bus bar 320 facing away from the support plate 400, and both the first bus bar 310 and the second bus bar 320 are respectively in communication with the collecting bar 210 so as to collect data (e.g., voltage, temperature, etc.) of any battery cell in the battery module 100.

Similarly, the acquisition bar 210 may be disposed on a side of both the first and third bus pieces 310, 330 facing away from the holder plate 400, with both the first and third bus pieces 310, 330 being in communication with the acquisition bar 210, respectively.

Preferably, as shown in fig. 1, the busbar assembly may further include a connector 220, and the connector 220 is communicatively connected to the collection bar 210 so as to collect the cell data collected by the collection bar 210. Optionally, the battery pack may include a battery management system and a wire, and the connector 220 may be communicatively connected to the battery management system via the wire to transmit the cell data.

Alternatively, the connector 220 may be formed as a Flexible Printed Circuit (FPC).

Preferably, the bus bar assembly may further include an insulation plate 500, and the insulation plate 500 is disposed on a side of the collecting bar 210 facing away from the battery module 100. Further insulating the busbars. Preferably, the insulating plate 500 is formed of polycarbonate (abbreviated as PC, also called PC plastic), and the insulating plate 500 may be integrally hot-pressed with the bracket plate 400, the first bus bar 310, the second bus bar 320, the third bus bar 330, the collection bar 210, and the connector 220.

Optionally, as shown in fig. 2, a fourth hole penetrating through the insulating plate 500 may be further formed in the insulating plate 500, and the fourth hole is disposed at a position corresponding to the cell post of the battery module 100.

On the basis of the above-described features, the battery module 100 shown in fig. 1 is described as an example, and the connection relationship of the bus bar assemblies will be described in detail below.

Taking the orientation shown in fig. 1 as an example, defining the lower core pack (i.e. the first core pack) as 1-1 cell, 1-2 cell, 1-3 cell, 1-4 cell, 1-5 cell, 1-6 cell, and 1-7 cell from left to right; the upper electric core group (namely the second electric core group) is sequentially 2-1 electric core, 2-2 electric core, 2-3 electric core, 2-4 electric core, 2-5 electric core and 2-6 electric core from left to right.

If the pole on the left side of the 1-1 electric core is a positive pole, the first second confluence piece 320 on the left side is used for connecting the negative pole of the 1-1 electric core and the positive pole of the 2-1 electric core, and the first confluence piece 310 on the left side is used for connecting the negative pole of the 2-1 electric core and the positive pole of the 1-2 electric core, so that the following electric cores are sequentially connected in series in a reciprocating manner. Up to 2-3 cells, a gap is formed between the 2-3 cells and the 2-4 cells to provide the aforementioned leads for connection to a battery management system. Preferably, the connector 220 is disposed in the gap, so that the connector 220 can avoid a high-voltage area at the end of the core pole, and a safe working environment of the connector 220 is ensured. The first bus bar 310 on the right side of the gap is used for connecting the negative pole of the 1-4 cell with the positive pole of the 2-4 cell, and the first third bus bar 330 on the right side of the gap is used for connecting the negative pole of the 2-4 cell with the positive pole of the 1-5 cell, so that the following cells are sequentially connected in series in a reciprocating manner.

According to a second aspect of the present application, a battery module 100 is provided, which includes the bus bar assembly according to any of the above-mentioned technical solutions, and thus, all the advantageous technical effects of the bus bar assembly are achieved, and no further description is provided herein.

According to a third aspect of the present application, a battery pack is provided, which includes the battery module 100 according to any one of the above-mentioned technical solutions, so that all the advantageous technical effects of the bus bar assembly and the battery module 100 are achieved, and the details are not repeated herein.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The bus bar assembly is used for a battery module (100), the battery module (100) comprises a first layer of electric core group (110) and a second layer of electric core group (120), the bus bar assembly comprises a first bus sheet (310) and a second bus sheet (320), the first bus sheet (310) and the second bus sheet (320) are used for connecting the first layer of electric core group (110) and the second layer of electric core group (120), the first bus sheet (310) extends along a first preset direction, the second bus sheet (320) extends along a second preset direction, and an included angle between the first preset direction and the second preset direction is an acute angle.

2. The busbar assembly according to claim 1, wherein the number of the first bus pieces (310) is a first predetermined number, the number of the second bus pieces (320) is a second predetermined number, and in a third predetermined direction, the first bus pieces (310) and the second bus pieces (320) are alternately arranged, and the first predetermined direction, the second predetermined direction, and the third predetermined direction all lie in the same plane.

3. The busbar assembly according to claim 2, further comprising a bracket portion, wherein both the first and second bus bars (310, 320) are disposed to the battery module (100) via the bracket portion.

4. The busbar assembly according to claim 3,

the bracket part is provided with a first groove (410) extending along a first preset direction and a second groove (420) extending along a second preset direction, the first confluence sheet (310) is arranged on the bracket part through the first groove (410), and the second confluence sheet (320) is arranged on the bracket part through the second groove (420);

the two ends of the first groove (410) are both provided with first holes penetrating through the support part, and the two ends of the second groove (420) are both provided with second holes penetrating through the support part.

5. The busbar assembly according to claim 2,

the first bus bar (310) is provided with a first bent part (311), the first bent part (311) is arranged in the middle of the first bus bar (310), the first bent part (311) extends along the third predetermined direction, and the first bent part (311) forms a groove which is concave to one side of the battery module (100);

the second current collecting piece (320) is provided with a second bending part (321), the second bending part (321) is arranged in the middle of the second current collecting piece (320), the second bending part (321) extends along the third predetermined direction, and the second bending part (321) forms a groove which is concave to one side of the battery module (100).

6. The busbar assembly according to claim 3, further comprising a collecting portion extending in the third predetermined direction, the collecting portion being provided on a side of both the first (310) and second (320) bus bar pieces facing away from the bracket portion, both the first (310) and second (320) bus bar pieces being in communication with the collecting portion, respectively.

7. The buss bar assembly of claim 6,

the busbar assembly further comprises a connector (220), the connector (220) being in communicative connection with the collection portion;

the busbar subassembly still includes insulating part, insulating part set up in the one side that deviates from of collection portion battery module (100).

8. The busbar assembly according to claim 1, further comprising a third busbar sheet (330), the third busbar sheet (330) being used for connecting the first layer of conductor sets (110) and the second layer of conductor sets (120), the third busbar sheet (330) extending in a fourth predetermined direction, both the fourth predetermined direction and the second predetermined direction being symmetrical with respect to the first predetermined direction.

9. A battery module (100) characterized by comprising the bus bar assembly according to any one of claims 1 to 8.

10. A battery pack characterized by comprising the battery module (100) according to claim 9.

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