Battery module directly connected with aluminum row and battery pack thereof

By using a battery module design with direct aluminum busbar connections, the long copper busbar connection is eliminated, solving the problems of high cost and space occupation in the battery pack and achieving more efficient space utilization.

CN223815788UActive Publication Date: 2026-01-20XIAOGAN CORNEX NEW ENERGY INNOVATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202423301056.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2026-01-20
Estimated Expiration
2034-12-31

AI Technical Summary

Technical Problem

In existing CTP battery packs, the total negative and total positive terminals need to be connected to the BDU high-voltage electrical interface via a long copper busbar running through the entire battery pack, resulting in high cost and large space occupation.

Method used

The battery module design adopts direct aluminum busbar connection. By connecting the total negative aluminum busbar, the total positive aluminum busbar, and the first to fourth aluminum busbar groups, the long copper busbar and output electrode base are eliminated, and aluminum busbars are directly set between the cell modules for connection.

Benefits of technology

This reduces the cost of long copper busbars, saves space in the battery pack, and improves space utilization.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a battery module directly connected with an aluminum row and a battery pack thereof. The battery module comprises a battery cell module, an aluminum row assembly, an FPC (Flexible Printed Circuit), a nickel sheet and a connector, the fourth aluminum row group is used for connecting two adjacent battery cell modules; the total cathode aluminum bar or the total anode aluminum bar is connected to the battery cell module on the outermost side in a connection mode of the first aluminum bar group, and the total cathode aluminum bar and the total anode aluminum bar are arranged on the adjacent sides of the same ends of the two adjacent battery cell modules; the interiors of the two battery cell modules located on the outermost side are arranged in a connection mode of a second aluminum row group, and the interiors of the odd number of battery cell modules located in the middle are arranged in a connection mode of a third aluminum row group. According to the battery module disclosed by the utility model, the total cathode aluminum row, the total anode aluminum row, the first aluminum row group, the second aluminum row group, the third aluminum row group and the fourth aluminum row group which are connected with one another are arranged, so that the total cathode aluminum row and the total anode aluminum row are finally arranged on adjacent sides of the same ends of two adjacent battery cell modules.
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Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery module of aluminium row direct connection and battery pack thereof. BACKGROUND

[0002] For the existing high integration CTP (no module battery technology) battery pack, the space between the front and back of the cell module and the box is limited, since the existing total negative pole and total positive pole appear at the opposite ends of the battery pack box, a long copper row penetrating through the whole battery pack is needed to be set to connect the total negative pole output base to the BDU high-voltage electrical interface, which is high in cost, and the output pole base accommodating the long copper row needs to be set on the front and rear beams, which needs to occupy a large battery pack space.

[0003] Therefore, a new scheme is needed to solve the above problems. SUMMARY

[0004] The utility model provides a battery module of aluminium row direct connection and battery pack thereof, can solve the problem in the prior art that a long copper row penetrating through the whole battery pack is needed to be set to connect the total negative pole output base to the BDU high-voltage electrical interface, which is high in cost, and the output pole base accommodating the long copper row needs to be set on the front and rear beams, which needs to occupy a large battery pack space.

[0005] The utility model provides a battery module of aluminium row direct connection, including cell module, aluminium row assembly, FPC, nickel sheet and connector,

[0006] The aluminium row assembly includes total negative pole aluminium row, total positive pole aluminium row, first aluminium row group, second aluminium row group, third aluminium row group and fourth aluminium row group,

[0007] (2N+1) parallelly arranged cell modules, a single cell module includes an even number of cells arranged in sequence, the cells of two adjacent cell modules are aligned one by one, and the number of single-row cells is also even,

[0008] The fourth aluminium row group is used for connecting the adjacent two cell modules,

[0009] The total negative pole aluminium row or total positive pole aluminium row is connected to the outermost cell module through the connection mode of the first aluminium row group, and the total negative pole aluminium row and total positive pole aluminium row are arranged on the adjacent sides of the same end of the adjacent two cell modules,

[0010] The interiors of the two outermost cell modules are arranged through the connection mode of the second aluminium row group, and the interiors of the odd number of middle cell modules are arranged through the connection mode of the third aluminium row group,

[0011] The end of the single FPC is provided with a connector for collecting battery cell data, and the nickel sheet is used to connect the aluminum strip assembly and the FPC.

[0012] Further, the first aluminum strip group is arranged at one end of the battery cell module close to the total negative aluminum strip, and the first aluminum strip group comprises a first transverse internal aluminum strip and a first transverse external aluminum strip arranged along the length direction of the battery cell, the first transverse internal aluminum strip is used for connecting the battery cells in the battery cell module, and the first transverse external aluminum strip is used for connecting two adjacent battery cell modules.

[0013] Further, the second aluminum strip group comprises a second longitudinal aluminum strip and a second transverse aluminum strip arranged in sequence, the second longitudinal aluminum strip is arranged along the length direction of the battery cell, and the second transverse aluminum strip is arranged along the width direction of the battery cell.

[0014] Further, the third aluminum strip group comprises a third longitudinal aluminum strip and a third transverse aluminum strip arranged in sequence, the third longitudinal aluminum strip is arranged along the width direction of the battery cell, and the third transverse aluminum strip is arranged along the length direction of the battery cell.

[0015] Further, the connector is connected to the battery management system through a wire.

[0016] Further, the connector is fixedly welded on the FPC through a surface mounting technology.

[0017] Further, the battery cell module further comprises a blister support, the blister support is arranged at the top of the battery cell, and the total negative aluminum strip, the total positive aluminum strip, the first aluminum strip group, the second aluminum strip group, the third aluminum strip group, the fourth aluminum strip group and the FPC are arranged on the blister support.

[0018] Further, the number of the nickel sheets is same as the sum of the number of the total negative aluminum strip, the total positive aluminum strip, the first aluminum strip group, the second aluminum strip group, the third aluminum strip group and the fourth aluminum strip group.

[0019] The application further comprises a battery pack comprising the battery module directly connected with the aluminum strip.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] 1. The battery module is connected with the total negative aluminum strip, the total positive aluminum strip, the first aluminum strip group, the second aluminum strip group, the third aluminum strip group and the fourth aluminum strip group, so that the total negative aluminum strip and the total positive aluminum strip are arranged at the adjacent sides of the same end of the two adjacent battery cell modules, the long copper strip and the output pole base are not needed, the cost of the long copper strip is reduced, and the space is saved.

[0022] 2. The fourth aluminum strip group is used for connecting the battery cell modules, so that the output pole base and the long copper strip are not needed, the material cost and the installation space are saved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The whole connection schematic diagram of the battery module directly connected with the aluminum row of the utility model and the BDU is shown in Figure 1;

[0024] Fig. 2 The high-voltage trend schematic diagram of the battery module directly connected with the aluminum row of the utility model is shown in Figure 2;

[0025] The symbols are as follows: 1, cell module; 11, cell; 2, aluminum row assembly; 21, total negative aluminum row; 22, total positive aluminum row; 23, first aluminum row group; 231, first horizontal internal aluminum row; 232, first horizontal external aluminum row; 24, second aluminum row group; 241, second longitudinal aluminum row; 242, second horizontal aluminum row; 25, third aluminum row group; 251, third horizontal aluminum row; 252, third longitudinal aluminum row; 26, fourth aluminum row group; 3, FPC; 4, nickel sheet; 5, connector; 6, plastic suction support; 7, BDU. DETAILED DESCRIPTION

[0026] In order to further understand the utility model content, characteristics and effects of the utility model, the following examples are given, and the accompanying drawings are combined Figs. 1-2 The detailed description is as follows.

[0027] As Figs. 1-2 shown, the embodiment provides a battery module directly connected with an aluminum row, which comprises a cell module 1, an aluminum row assembly 2, an FPC 3 (flexible circuit board), a nickel sheet 4 and a connector 5.

[0028] The aluminum row assembly 2 comprises a total negative aluminum row 21, a total positive aluminum row 22, a first aluminum row group 23, a second aluminum row group 24, a third aluminum row group 25 and a fourth aluminum row group 26.

[0029] 2N+1 cell modules 1 are arranged side by side, wherein N is a natural number greater than 0, the value of which is 1 in the embodiment, a single cell module 1 comprises an even number of cells 11 arranged in sequence, the cells 11 of two adjacent cell modules 1 are aligned one by one, so that the cells 11 are arranged in the whole battery box, thereby maximizing the use of the space in the battery box, wherein the number of single-row cells 11 is also even, in the embodiment, the number of cell modules 1 is three, a single cell module 1 comprises two rows of cells 11 arranged in sequence, and the number of single-row cells 11 is eighteen, the above parameters can also be selected according to actual conditions.

[0030] The fourth aluminum row group 26 is used for connecting the adjacent two cell modules 1, in the embodiment, the number of fourth aluminum row groups 26 is two, the cell modules of the utility model are connected by the fourth aluminum row groups, without the need to arrange an output pole base and a long copper row, thereby saving material cost and installation space.

[0031] The total negative aluminum busbar 21 is connected to the outermost cell module 1 through the connection of the first aluminum busbar group 23. Alternatively, the total positive aluminum busbar 22 can be connected to the outermost cell module 1 through the connection of the first aluminum busbar group 23. The total negative aluminum busbar 21 and the total positive aluminum busbar 22 are arranged on adjacent sides of the same end of two adjacent cell modules 1. This arrangement allows the entire battery pack to be filled with cells 11.

[0032] The two outermost battery cell modules 1 are arranged internally through the connection of the second aluminum busbar group 24, and the odd number of battery cell modules 1 in the middle are arranged internally through the connection of the third aluminum busbar group 25. In the connection of the second aluminum busbar group 24, the input and output ends of a single battery cell module 1 are located at opposite ends. In the connection of the third aluminum busbar group 25, the input and output ends of a single battery cell module 1 are located at the same end.

[0033] Each FPC3 has a connector 5 at one end for collecting data from the cell 11. The nickel plate 4 is used to connect the aluminum busbar assembly 2 and the FPC3. Two FPC3s are provided in a single cell module 1.

[0034] The battery module of this utility model sets up a total negative aluminum busbar, a total positive aluminum busbar, a first aluminum busbar group, a second aluminum busbar group, a third aluminum busbar group, and a fourth aluminum busbar group that are interconnected. Ultimately, the total negative aluminum busbar and the total positive aluminum busbar are set on adjacent sides of the same end of two adjacent cell modules. There is no need to set up long copper busbars and output electrode bases, which can reduce the cost of long copper busbars and save space.

[0035] In this embodiment, as Fig. 1 As shown, the first aluminum busbar group 23 is disposed at one end of the cell module 1 near the total negative aluminum busbar 21. The first aluminum busbar group 23 includes a first transverse inner aluminum busbar 231 and a first transverse outer aluminum busbar 232 disposed along the length direction of the cell 11. The first transverse inner aluminum busbar 231 is used to connect the cell 11 within the cell module 1, and the first transverse outer aluminum busbar 232 is used to connect two adjacent cell modules 1. In this embodiment, there is one first transverse inner aluminum busbar 231 and one first transverse outer aluminum busbar 232. By setting the first aluminum busbar group 23, the total negative aluminum busbar 21 is connected to the outermost cell module 1 on the side opposite to the total negative aluminum busbar 21.

[0036] In this embodiment, as Fig. 1 and 2As shown, the second aluminum row group 24 includes a second longitudinal aluminum row 241 and a second transverse aluminum row 242 arranged in sequence, wherein the second longitudinal aluminum row 241 is located in the middle of the battery cell module 1, and the second transverse aluminum row 242 is located on the left and right sides of the second longitudinal aluminum row 241, the second longitudinal aluminum row 241 is arranged along the length direction of the battery cell 11, and the second transverse aluminum row 242 is arranged along the width direction of the battery cell 11, so that the input end and the output end of the single battery cell module 1 are located at opposite ends, wherein the shapes of the second longitudinal aluminum row 241 and the second transverse aluminum row 242 are similar to rectangles, and the x-axis direction in the figure is the length direction of the battery cell 11, and the y-axis direction is the width direction of the battery cell 11.

[0037] In the embodiment, as shown, Fig. 2 As shown, the third aluminum row group 25 includes a third longitudinal aluminum row 251 and a third transverse aluminum row 252 arranged in sequence, wherein the number of the third transverse aluminum row 252 is only one, the third longitudinal aluminum row 251 is arranged along the width direction of the battery cell 11, and the third transverse aluminum row 252 is arranged along the length direction of the battery cell 11, so that the input end and the output end of the single battery cell module 1 are located at the same end.

[0038] In the embodiment, the connector 5 is connected to the battery management system through the wire, the connector serves as an output interface of the battery module, and matching connection between the power output end and the automobile power end can be realized.

[0039] In the embodiment, the connector 5 is fixedly welded on the FPC 3 through the surface mounting technology, so that the connection is more firm.

[0040] In the embodiment, the battery module further includes a blister support 6 arranged at the top of the battery cell 11, and the total negative aluminum row 21, the total positive aluminum row 22, the first aluminum row group 23, the second aluminum row group 24, the third aluminum row group 25, the fourth aluminum row group 26 and the FPC 3 are arranged on the blister support 6.

[0041] In the embodiment, the number of the nickel sheet 4 is the same as the sum of the numbers of the total negative aluminum row 21, the total positive aluminum row 22, the first aluminum row group 23, the second aluminum row group 24, the third aluminum row group 25 and the fourth aluminum row group 26.

[0042] The application further includes a battery pack including the battery module with the directly connected aluminum rows.

[0043] The above-mentioned utility model of the application only expresses the implementation mode of the embodiment of the application, and cannot be understood as the limitation of the scope of the utility model patent, nor as any form of limitation on the structure of the embodiment of the application. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the embodiment of the application, a number of changes and improvements can be made, which all belong to the protection scope of the embodiment of the application.

Claims

1. A battery module with direct connection of aluminum busbars, characterized in that: The battery cell module (1), the aluminum bar assembly (2), the FPC (3), the nickel sheet (4) and the connector (5) are included. The aluminum bar assembly (2) includes a total negative aluminum bar (21), a total positive aluminum bar (22), a first aluminum bar group (23), a second aluminum bar group (24), a third aluminum bar group (25) and a fourth aluminum bar group (26). (2N+1) battery cell modules (1) are arranged side by side, each of the battery cell modules (1) includes battery cells (11) arranged in an even number of columns, the battery cells (11) of two adjacent battery cell modules (1) are aligned one by one, and the number of single-column battery cells (11) is also even. The fourth aluminum bar group (26) is used to connect the adjacent two battery cell modules (1). The total negative aluminum bar (21) or the total positive aluminum bar (22) is connected to the outermost battery cell module (1) through the connection mode of the first aluminum bar group (23), and the total negative aluminum bar (21) and the total positive aluminum bar (22) are arranged on the adjacent side of the same end of the adjacent two battery cell modules (1). The interiors of the two outermost battery cell modules (1) are arranged through the connection mode of the second aluminum bar group (24), and the interiors of the odd number of middle battery cell modules (1) are arranged through the connection mode of the third aluminum bar group (25). The end of each FPC (3) is provided with a connector (5) for collecting battery cell (11) data, and the nickel sheet (4) is used to connect the aluminum bar assembly (2) and the FPC (3).

2. The battery module of claim 1, wherein: The first aluminum bar group (23) is arranged at one end of the battery cell module (1) close to the total negative aluminum bar (21), the first aluminum bar group (23) includes a first transverse internal aluminum bar (231) and a first transverse external aluminum bar (232) arranged along the length direction of the battery cell (11), the first transverse internal aluminum bar (231) is used to connect the battery cell (11) in the battery cell module (1), and the first transverse external aluminum bar (232) is used to connect the adjacent two battery cell modules (1).

3. The battery module of claim 1, wherein: The second aluminum bar group (24) includes a second longitudinal aluminum bar (241) and a second transverse aluminum bar (242) arranged in sequence, the second longitudinal aluminum bar (241) is arranged along the length direction of the battery cell (11), and the second transverse aluminum bar (242) is arranged along the width direction of the battery cell (11).

4. The battery module of claim 1, wherein: The third aluminum bar group (25) includes a third longitudinal aluminum bar (251) and a third transverse aluminum bar (252) arranged in sequence, the third longitudinal aluminum bar (251) is arranged along the width direction of the battery cell (11), and the third transverse aluminum bar (252) is arranged along the length direction of the battery cell (11).

5. The battery module of claim 1, wherein: The connector (5) is connected to the battery management system through a wire.

6. The battery module of claim 1, wherein: The connector (5) is fixedly welded on the FPC (3) by surface mounting technology.

7. The battery module of claim 1, wherein: It also includes a blister support (6), the blister support (6) is arranged on the top of the battery cell (11), and the total negative aluminum bar (21), the total positive aluminum bar (22), the first aluminum bar group (23), the second aluminum bar group (24), the third aluminum bar group (25), the fourth aluminum bar group (26) and the FPC (3) are arranged on the blister support (6).

8. The battery module of claim 1, wherein: The number of the nickel sheets (4) is the same as the sum of the number of the total negative aluminum row (21), the total positive aluminum row (22), the first aluminum row group (23), the second aluminum row group (24), the third aluminum row group (25) and the fourth aluminum row group (26).

9. A battery pack, characterized by: The battery module directly connected with the aluminum row as claimed in any one of claims 1-8 is included.