Convergence structure

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a confluence structure. The utility model aims to solve the problem of large occupied space in the Z direction of the battery pack in the related technology. According to the confluence structure, the pole accommodating area is used for accommodating at least part of the pole of the battery cell, and the pole accommodating area is sunken relative to the first supporting area, so that the pole and the confluence structure are at least partially overlapped along the Z direction; in addition, the wiring area is used for accommodating a sampling wire harness, and the wiring area is recessed relative to the second supporting area, so that the sampling wire harness and the confluence structure are at least partially overlapped along the Z direction; besides, the side, facing the wiring area, of the sampling connecting part is used for being connected with a sampling terminal, and the side, facing the wiring area, of the sampling connecting part is sunken relative to the wiring area, so that the sampling terminal and the confluence structure are at least partially overlapped in the Z direction, and the pole, the sampling wire harness and the sampling terminal are at least partially overlapped with the confluence structure in the Z direction. Therefore, the space occupied by the battery pack in the Z direction is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of power battery technology, and in particular to a busbar structure. Background Art

[0002] As the core power supply component of electric vehicles, the battery pack determines key indicators such as the electric vehicle's driving range, cost, service life, safety, and maintainability.

[0003] In the related art, a battery pack includes a plurality of battery cells and a bus bar. The bus bar is arranged on the top of the battery cell along the Z direction and is welded to the pole of the battery cell to conduct the current inside the battery cell.

[0004] However, since the busbar occupies a large space in the Z direction, the battery pack also has the problem of occupying a large space in the Z direction. Utility Model Content

[0005] In view of this, the main purpose of the embodiments of the present application is to provide a busbar structure to solve the technical problem that the battery pack occupies a large space in the Z direction.

[0006] To achieve the above-mentioned purpose, an embodiment of the present application provides a busbar structure, including a battery cell connection part and a sampling connection part, one side of the battery cell connection part includes a first support area and a pole accommodating area, the first support area and the pole accommodating area are staggered, and the pole accommodating area is sunken relative to the first support area, the other side of the battery cell connection part includes a second support area and a routing area, the second support area and the routing area are staggered, and the routing area is sunken relative to the second support area; the sampling connection part is connected to the edge of the battery cell connection part, the sampling connection part is adjacent to the routing area on the side facing the routing area, the sampling connection part is staggered with the routing area on the side facing the routing area, and is sunken relative to the routing area.

[0007] In some embodiments that may include the above embodiments, there are two battery cell connection parts, the two battery cell connection parts are respectively connected to opposite sides of the sampling connection part, and the routing area of ​​at least one battery cell connection part is adjacent to the sampling connection part.

[0008] In some embodiments that may include the above embodiments, the two battery cell connection parts are respectively connected to two sides of the sampling connection part along the first direction, and the routing areas of the two battery cell connection parts are adjacent to the sampling connection part.

[0009] In some embodiments that may include the above embodiments, the two battery cell connection parts are respectively connected to the two sides of the sampling connection part along the second direction, the routing area of ​​one battery cell connection part is adjacent to the sampling connection part, and the second supporting area of ​​the other battery cell connection part is separated between the routing area and the sampling connection part.

[0010] In some embodiments that may include the above embodiments, the routing area connected to the sampling connection portion includes a first routing area and a second routing area, the first routing area is spaced apart from the sampling connection portion, and the second routing area is connected between the sampling connection portion and the first routing area.

[0011] In some embodiments that may include the above embodiments, the first routing area extends along a first direction, and the second routing area extends along the second direction.

[0012] In some embodiments that may include the above embodiments, the battery cell connecting portion is in the shape of a plate, the first supporting area constitutes one side surface of the battery cell connecting portion, and the second supporting area constitutes the other side surface of the battery cell connecting portion.

[0013] In some embodiments that may include the above embodiments, the pole accommodating area corresponds to the second supporting area, and the wiring area corresponds to the first supporting area.

[0014] In some embodiments that may include the above embodiments, the sampling connection portion is staggered with the first supporting region on one side thereof facing the first supporting region, and the first supporting region is recessed relative to the sampling connection portion.

[0015] In some embodiments that may include the above embodiments, a through hole is opened at the center of the pole accommodating area, and the through hole passes through the battery cell connecting portion.

[0016] In the bus structure provided in the embodiment of the present application, the pole accommodating area is used to accommodate the poles of at least part of the battery cells, and the pole accommodating area is recessed relative to the first supporting area so that at least part of the poles are hidden in the bus structure, so that the poles and the bus structure at least partially overlap along the Z direction; in addition, the routing area is used to accommodate the sampling harness, and the routing area is recessed relative to the second supporting area so that the sampling harness and the bus structure at least partially overlap along the Z direction; the side of the sampling connection portion facing the routing area is used to connect the sampling terminal, and the side of the sampling connection portion facing the routing area is recessed relative to the routing area so that the sampling terminal and the bus structure at least partially overlap along the Z direction, so that the poles, the sampling harness and the sampling terminals all overlap with the bus structure at least partially along the Z direction, thereby reducing the occupied space of the battery pack along the Z direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of the bus structure provided in the embodiment of the present application connected to the battery cell module and the sampling harness in the battery pack;

[0019] Figure 2 A schematic diagram of the structure of a battery cell in a battery pack provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of the confluence structure provided in the embodiment of the present application Figure 1 ;

[0021] Figure 4 A schematic diagram of the structure of the confluence structure provided in the embodiment of the present application Figure 2 ;

[0022] Figure 5 A schematic diagram of the structure of the confluence structure provided in the embodiment of the present application Figure 3 ;

[0023] Figure 6 A schematic diagram of the structure of the confluence structure provided in the embodiment of the present application Figure 4 ;

[0024] Figure 7 A schematic diagram of the structure of the confluence structure provided in the embodiment of the present application Figure 5 ;

[0025] Figure 8 for Figure 1 The enlarged schematic diagram of P1 in the middle;

[0026] Fig. 9 for Figure 1 Enlarged schematic diagram of P2 in the figure.

[0027] Description of reference numerals:

[0028] 20. Battery cell module;

[0029] 210, battery cell; 211, pole;

[0030] 212. Battery cell body;

[0031] 40. Confluence structure;

[0032] 410. Cell connection portion; 411. First support area;

[0033] 412. Pole accommodating area; 413. Second supporting area;

[0034] 414, routing area; 415, through hole;

[0035] 4141, first routing area; 4142, second routing area;

[0036] 420, sampling connection portion;

[0037] 50. Sampling harness;

[0038] 510. Sampling terminal. DETAILED DESCRIPTION

[0039] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0040] Secondly, it should be noted that in the description of the embodiments of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0041] In addition, it should be noted that in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] As described in the background technology, the battery pack in the related technology has the problem of occupying a large space in the Z direction. The applicant has found through research that the reason for this problem is that when the battery cells of the related battery pack are placed upright, the middle structure of the bus is convex upward, resulting in an increase in the space occupied by the bus in the Z direction; in addition, the welding part of the bus is stamped downward, and after the bottom of the welding part is welded to the pole, there is no overlapping part between the pole and the bus in the Z direction, which further leads to an increase in the space occupied by the bus in the Z direction, and then leads to an increase in the space occupied by the entire battery pack in the Z direction.

[0044] In response to the above technical problems, an embodiment of the present application provides a bus structure, wherein a first support area and a pole accommodating area are constructed on one side of a battery cell connection portion, and a second support area and a wiring area are constructed on the other side, the pole accommodating area is used to accommodate at least part of the poles of the battery cells, and the pole accommodating area is recessed relative to the first support area so that at least part of the poles are hidden in the bus structure, so that the poles and the bus structure at least partially overlap along the Z direction; in addition, the wiring area is used to accommodate a sampling harness, and the wiring area is recessed relative to the second support area so that the sampling harness and the bus structure at least partially overlap along the Z direction; in addition, a sampling connection portion is connected to the edge of the battery cell connection portion, and the side of the sampling connection portion facing the wiring area is used to connect the sampling terminal, and the side of the sampling connection portion facing the wiring area is recessed relative to the wiring area so that the sampling terminal and the bus structure at least partially overlap along the Z direction, so that the poles, the sampling harness and the sampling terminals all overlap at least partially with the bus structure along the Z direction, thereby reducing the occupied space of the battery pack along the Z direction.

[0045] The principles and features of the embodiments of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the embodiments of the present application and are not used to limit the scope of the embodiments of the present application.

[0046] refer to Figure 1 This embodiment provides a bus structure 40 , one side of which is used to connect to the battery cell module 20 of the battery pack, and the other side of which is used to connect to the sampling harness 50 of the battery pack.

[0047] The battery cell module 20 may include a plurality of battery cell groups, each battery cell group includes a plurality of battery cells 210 , the plurality of battery cells 210 are sequentially arranged along a first direction X, and the plurality of battery cell groups are sequentially arranged along a second direction Y.

[0048] refer to Figure 2 The battery cell 210 includes a battery cell body 212 and two poles 211 .

[0049] The bus structure 40 can be welded to the pole 211 to extract the current of the battery cell 210. The sampling terminal 510 of the sampling harness 50 is electrically connected to the bus structure 40 to collect the voltage and temperature of the battery cell 210.

[0050] refer to Figure 3 The bus structure 40 may include a cell connection portion 410 and a sampling connection portion 420 .

[0051] The cell connection portion 410 is configured to be connected to the pole 211 of the cell 210 , and the sampling connection portion 420 is configured to be connected to the sampling harness 50 .

[0052] The following embodiments describe the bus structure 40 by taking the battery cell 210 of the battery cell module 20 as an example. The top of the bus structure 40 is the side of the bus structure 40 facing the upper cover 120 , and the bottom of the bus structure 40 is the side of the bus structure 40 facing the battery cell 210 .

[0053] refer to Figure 4 The bottom of the cell connecting portion 410 may include a first supporting area 411 and a pole accommodating area 412 . The pole accommodating area 412 and the first supporting area 411 are staggered, and the pole accommodating area 412 is recessed relative to the first supporting area 411 .

[0054] After the pole 211 of the battery cell 210 is accommodated in the pole accommodating area 412, at least part of the pole 211 is hidden in the bus structure 40, so that the pole 211 and the bus structure 40 at least partially overlap along the third direction Z, reducing the space occupied by the bus structure 40 and the battery cell 210 along the third direction Z.

[0055] refer to Figure 5-Figure 7 The top of the battery cell connecting portion 410 may include a second supporting area 413 and a wiring area 414 . The wiring area 414 and the second supporting area 413 are staggered, and the wiring area 414 is recessed relative to the second supporting area 413 .

[0056] The sampling harness 50 is accommodated in the routing area 414 , and the sampling harness 50 and the bus structure 40 at least partially overlap along the third direction Z, thereby reducing the space occupied by the bus structure 40 and the sampling harness 50 along the third direction Z.

[0057] The sampling connection portion 420 can be connected to the edge of the battery cell connection portion 410, and the side of the sampling connection portion 420 facing the routing area 414 is adjacent to the routing area 414, and the side of the sampling connection portion 420 facing the routing area 414 is staggered with the routing area 414, and the side of the sampling connection portion 420 facing the routing area 414 is recessed relative to the routing area 414, and the sampling terminal 510 of the sampling harness 50 is connected to the top of the sampling connection portion 420, so that the sampling terminal 510 and the bus structure 40 at least partially overlap along the third direction Z.

[0058] The bus structure 40, the pole 211, the sampling harness 50 and the sampling terminal 510 in this embodiment all at least partially overlap with the bus structure 40 along the third direction Z, thereby reducing the occupied space of the whole formed by the battery cell 210, the bus structure 40, the sampling harness 50 and the sampling terminal 510 along the third direction Z, thereby reducing the occupied space of the battery pack along the third direction Z.

[0059] In some possible implementations, there may be two cell connection parts 410 , which are respectively connected to opposite sides of the sampling connection part 420 , and a routing area 414 of at least one cell connection part 410 is adjacent to the sampling connection part 420 .

[0060] refer to Figure 5 In some possible implementations, the two battery cell connection parts 410 may be respectively connected to the two sides of the sampling connection part 420 along the first direction X, and the routing areas 414 of the two battery cell connection parts 410 are adjacent to the sampling connection part 420 .

[0061] refer to Figure 1 , Figure 5 and Figure 8 The bus structure 40 in this embodiment can electrically connect two adjacent poles 211 along the first direction X, wherein one pole 211 is welded to the pole accommodating area 412 of one battery cell connection part 410, and the other pole 211 is welded to the pole accommodating area 412 of another battery cell connection part 410, and the sampling harness 50 is arranged along the sampling area, and the sampling terminal 510 of the sampling harness 50 is welded to the sampling connection part 420.

[0062] Furthermore, the two routing areas 414 may be located on the same side of the bus structure 40 along the second direction Y, so that the sampling harness 50 may extend along the second direction Y, reducing the bending path of the sampling harness 50 and facilitating the arrangement of the sampling harness 50 .

[0063] refer to Figure 6 In some possible implementations, the two battery cell connection parts 410 can be respectively connected to the two sides of the sampling connection part 420 along the second direction Y, the routing area 414 of one battery cell connection part 410 is adjacent to the sampling connection part 420, and the second support area 413 of the other battery cell connection part 410 is separated between the routing area 414 and the sampling connection part 420.

[0064] refer to Figure 1 , Figure 6 and Figure 8, the bus structure 40 in this embodiment can be connected between two adjacent poles 211 of the first battery cell and the second battery cell, and the first battery cell and the second battery cell are respectively located in two adjacent battery cell groups, so that the bus structure 40 can electrically connect the two adjacent battery cell groups. It should be noted that the first battery cell and the second battery cell are arranged adjacent to each other along the second direction Y, the first battery cell is located in one of the two adjacent battery cell groups, the second battery cell is located in the other of the two adjacent battery cell groups, and the first battery cell and the second battery cell are located at the ends of the battery cell groups along the second direction Y. When specifically set, one pole 211 is welded to the pole accommodating area 412 of one battery cell connection part 410, and the other pole 211 is welded to the pole accommodating area 412 of another battery cell connection part 410. The sampling terminal 510 of the sampling harness 50 is welded to the top of the sampling connection part 420, and the sampling harness 50 is arranged along the routing area 414 connected to the sampling connection part 420.

[0065] Further, the routing area 414 connected to the sampling connection part 420 may include a first routing area 4141 and a second routing area 4142, the first routing area 4141 is spaced apart from the sampling connection part 420, and the second routing area 4142 is connected between the sampling connection part 420 and the first routing area 4141. The extension direction of the first routing area 4141 may be parallel to the first direction X, and the extension direction of the second routing area 4142 may be parallel to the second direction Y, so that the extension direction of the sampling harness 50 is consistent with the arrangement direction of each battery cell 210 of the battery cell group, so that the arrangement of the sampling harness 50 is more concise and regular, and it is easy to arrange.

[0066] refer to Figure 7 In some possible implementations, the bus structure 40 may include a cell connection portion 410 , and the cell connection portion 410 is connected to one side of the sampling connection portion 420 along the first direction X.

[0067] refer to Figure 1 , Figure 7 and Fig. 9 The bus structure 40 in this embodiment can be connected to the pole 211 at the end of the battery cell group, and the pole 211 can be welded to the pole accommodating area 412 of the battery cell connecting part 410. The sampling terminal 510 of the sampling harness 50 is welded to the top of the sampling connecting part 420, and the sampling harness 50 is arranged along the routing area 414.

[0068] refer to Figure 3 In some embodiments, the cell connection portion 410 may be in the shape of a plate. The first support area 411 constitutes the bottom surface of the cell connection portion 410, and the second support area 413 constitutes the top surface of the cell connection portion 410. The flat cell connection portion 410 has a simpler structure, making the busbar structure 40 easier to manufacture.

[0069] In some embodiments, the above-mentioned pole accommodating area 412 can correspond to the second support area 413, so that after the pole accommodating area 412 is recessed relative to the routing area 414, the portion of the second support area 413 corresponding to the pole accommodating area 412 does not bulge as the pole accommodating area 412 is recessed, thereby reducing the space occupied by the bus structure 40 along the third direction Z, and thereby reducing the space occupied by the battery pack along the third direction Z.

[0070] The routing area 414 can correspond to the first support area 411, so that after the routing area 414 is recessed relative to the second support area 413, the portion of the first support area 411 corresponding to the routing area 414 does not bulge as the routing area 414 is recessed, thereby reducing the space occupied by the bus structure 40 along the third direction Z, and thereby reducing the space occupied by the battery pack along the third direction Z.

[0071] In some embodiments, the sampling connection portion 420 is staggered with the first support area 411 on one side thereof, and the sampling connection portion 420 is recessed relative to the sampling connection portion 420 on the side thereof facing the first support area 411, so that the thickness of the sampling connection portion 420 along the third direction Z is increased, thereby improving the strength of the confluence structure 40.

[0072] In some possible implementations of the embodiments of the present application, a through hole 415 may be opened in the center of the pole accommodating area 412, and the through hole 415 passes through the battery cell connecting part 410. The through hole 415 is used to correspond to the center of the pole 211. When the bus structure 40 is welded to the pole 211, the welder can observe through the through hole 415 whether the pole accommodating area 412 is aligned with the pole 211 to ensure that the bus structure 40 is welded in place.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A confluence structure, characterized in that: include: A cell connection portion, one side of which includes a first support area and a pole accommodating area, the first support area and the pole accommodating area are arranged in staggered layers, and the pole accommodating area is sunken relative to the first support area, and the other side of the cell connection portion includes a second support area and a wiring area, the second support area and the wiring area are arranged in staggered layers, and the wiring area is sunken relative to the second support area; A sampling connection portion is connected to the edge of the cell connection portion, the sampling connection portion is adjacent to the wiring area on one side facing the wiring area, the sampling connection portion is staggered with the wiring area on one side facing the wiring area, and is sunken relative to the wiring area.

2. The confluence structure according to claim 1, characterized in that: There are two battery cell connection parts, and the two battery cell connection parts are respectively connected to two opposite sides of the sampling connection part, and the routing area of ​​at least one battery cell connection part is adjacent to the sampling connection part.

3. The confluence structure according to claim 2, characterized in that: The two battery cell connection parts are respectively connected to two sides of the sampling connection part along the first direction, and the routing areas of the two battery cell connection parts are adjacent to the sampling connection part.

4. The confluence structure according to claim 2, characterized in that: The two cell connection parts are respectively connected to the two sides of the sampling connection part along the second direction, the routing area of ​​one cell connection part is adjacent to the sampling connection part, and the second supporting area of ​​the other cell connection part is separated between the routing area and the sampling connection part.

5. The confluence structure according to claim 4, characterized in that: The routing area connected to the sampling connection portion includes a first routing area and a second routing area, the first routing area is spaced apart from the sampling connection portion, and the second routing area is connected between the sampling connection portion and the first routing area.

6. The confluence structure according to claim 5, characterized in that: The first routing area extends along a first direction, and the second routing area extends along the second direction.

7. The confluence structure according to any one of claims 1 to 6, characterized in that: The cell connection portion is in a flat plate shape, the first support area constitutes one side surface of the cell connection portion, and the second support area constitutes the other side surface of the cell connection portion.

8. The confluence structure according to any one of claims 1 to 6, characterized in that: The pole accommodating area corresponds to the second supporting area, and the wiring area corresponds to the first supporting area.

9. The confluence structure according to any one of claims 1 to 6, characterized in that: The sampling connection portion is disposed in a staggered manner with the first supporting area on one side thereof facing the first supporting area, and the first supporting area is recessed relative to the sampling connection portion.

10. The confluence structure according to any one of claims 1 to 6, characterized in that: A through hole is provided at the center of the pole accommodating area, and the through hole passes through the battery core connecting portion.

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