Battery module and acquisition mechanism thereof

Abstract

Provided are a battery module and an acquisition mechanism thereof. The battery module acquisition mechanism comprises a bracket and an acquisition group; the acquisition group comprises a series assembly and an acquisition assembly; the series assembly comprises a first series group and a second series group which are mounted on the bracket; the first series group and the second series group both comprise a first series row and a second series row which are opposite to each other, and the first series group and the second series group respectively correspond to one battery cell group; the acquisition assembly comprises a first acquisition line and a second acquisition line which are both mounted on the bracket and are oppositely arranged; two first series rows of the first series group and second series group are disposed on the side of the first acquisition line far away from the second acquisition line and are electrically connected to the first acquisition line, and two second series rows of the first series group and second series group are disposed on the side of the second acquisition line far away from the first acquisition line and are electrically connected to the second acquisition line.

Description

Battery module and its collection mechanism

[0001] This application claims priority to the Chinese patent applications filed with the China Patent Office on December 18, 2023, with application numbers 202311749998.0 and 202323464344.1, and the entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery module and a collection mechanism thereof. Background Art

[0003] In related technologies, the battery system's CCS (Cells Contact System) component is used to collect cell signals. This signal is then monitored via the corresponding CSC component, which ultimately transmits the relevant information to the BMS (Battery Management System), which in turn controls the cell voltage. Each battery module's CCS component corresponds to a CSC (Cell Supervision Circuit) component, resulting in a complex wiring harness for the integrated battery module. Furthermore, the CSC components of multiple battery modules occupy mounting space between battery modules, reducing energy density. SUMMARY OF THE INVENTION

[0004] The present application provides a battery module and a collection mechanism thereof, which can improve the technical problem of low energy density after multi-module integration.

[0005] In a first aspect, the present application provides a battery module collection mechanism, comprising: a bracket and a collection group; the collection group comprises a series assembly and a collection assembly, the series assembly comprises a first series group and a second series group both mounted on the bracket, the first series group and the second series group both comprising a first series row and a second series row opposite to each other, the first series group and the second series group respectively corresponding to a battery cell group; the collection assembly comprises a first collection line and a second collection line both mounted on the bracket and opposite to each other; wherein, the two first series rows of the first series group and the second series group are located on a side of the first collection line away from the second collection line and are electrically connected to the first collection line, and the two second series rows of the first series group and the second series group are located on a side of the second collection line away from the first collection line and are electrically connected to the second collection line.

[0006] In the second aspect, the present application also provides a battery module, comprising at least two battery cell groups, and comprising the above-mentioned battery module collection mechanism having a corresponding number as the battery cell groups, the battery cell group comprises two battery cell groups, and the two battery cell groups are respectively electrically connected to the first series group and the second series group; the series assembly also includes a first connecting member connecting the first series group and the second series group, and the first connecting member connects the two battery cell groups in series. Beneficial effects

[0007] The beneficial effects of the present application are as follows: a battery module collection mechanism is provided in the present application, in which a first series row and a second series row corresponding to each battery cell group are integrated on a bracket, and the first series group of the first series row and the second series row share a first collection line, and the second series group of the first series row and the second series row share a second collection line, thereby achieving the purpose of integrating the original two battery modules into one battery module, reducing the use of collection lines and CSC components after battery module integration in related technologies, thereby improving space utilization and energy density.

[0008] The present application provides a battery module comprising at least two battery cell groups and the above-mentioned battery collection mechanism having a corresponding number as the battery cell groups. The module can integrate the original two battery modules into one battery module, thereby reducing the use of collection lines and CSC components after battery module integration in related technologies, thereby improving space utilization and energy density. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic diagram of the installation of two first collection mechanisms provided in an embodiment of the present application;

[0010] FIG2 is an enlarged view of point A in FIG1 .

[0011] FIG3 is a perspective schematic diagram of a collection assembly provided in an embodiment of the present application.

[0012] FIG4 is an enlarged view of point B in FIG3 .

[0013] FIG5 is a perspective schematic diagram of a first connecting member and a second connecting member provided in an embodiment of the present application.

[0014] Figure 6 is a perspective schematic diagram of a bracket provided in an embodiment of the present application;

[0015] FIG7 is a schematic structural diagram of a battery cell grouping provided in an embodiment of the present application.

[0016] Description of the accompanying drawings;

[0017] 1. Battery module collection mechanism; 100. Collection group; 110. Series assembly; 11. First series group; 12. Second series group; 101. First series row; 102. Second series row; 120. Collection assembly; 13. First collection line; 131. First connecting part; 132. First buffer part; 133. First groove; 14. Second collection line; 141. Second connecting part; 142. Second buffer part; 143. Second groove; 21. First connecting part; 22. First integrated part; 23. Second integrated part; 24. Protrusion; 25. Recess; 3. Bracket; 31. Collection line mounting slot; 32. Connector mounting slot; 4. Connecting circuit board; 5. Cell grouping; 51. Cell group. Modes for Carrying Out the Invention

[0018] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0019] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0021] Example 1

[0022] 1 and 7 , the present application provides a battery module collection mechanism 1 , comprising:

[0023] Bracket 3; and

[0024] The collection group 100 includes a series assembly 110 and a collection assembly 120. The series assembly 110 includes a first series assembly 11 and a second series assembly 12, both mounted on the bracket 3. The first series assembly 11 and the second series assembly 12 each include a first series row 101 and a second series row 102, each corresponding to a cell group 51. The collection assembly 120 includes a first collection line 13 and a second collection line 14, both mounted on the bracket 3 and arranged opposite each other.

[0025] The two first series rows 101 of the first series group 11 and the second series group 12 are located on a side of the first collection line 13 away from the second collection line 14 and are electrically connected to the first collection line 13. The two second series rows 102 of the first series group 11 and the second series group 12 are located on a side of the second collection line 14 away from the first collection line 13 and are electrically connected to the second collection line 14.

[0026] First, the first series row 101 and the second series row 102 are arranged on the same bracket 3, so that the corresponding battery cell groups 51 can be installed more closely, thereby improving space utilization. Second, the first series row 101 and the second series row 102 share a first collection line 13, and the second series row 102 share a second collection line 14. Based on the relevant technology, the use of collection lines is reduced, thereby reducing the use of CSC components, further saving space, and improving space energy density.

[0027] Example 2

[0028] 1 and 7 , a battery module collection mechanism 1 provided in an embodiment of the present application includes a bracket 3 and a collection group 100 . The collection group 100 includes a series assembly 110 and a collection assembly 120 .

[0029] The series assembly 110 includes a first series group 11 , a second series group 12 and a first connector 21 , all of which are mounted on the bracket 3 .

[0030] The collection assembly 120 includes a first collection line 13 and a second collection line 14 which are mounted on the bracket 3 and arranged opposite to each other.

[0031] The first series group 11 is used to connect a battery cell group 51 in series, and the second series group 12 is used to connect a battery cell group 51 in series. The first series group 11 and the second series group 12 both include opposite first series rows 101 and second series rows 102. The first series rows 101 and the second series rows 102 are provided in the same number, and both the first series rows 101 and the second series rows 102 are used to connect the positive and negative poles of adjacent battery cells, and the opposite first series rows 101 and the second series rows 102 are used to connect the positive and negative poles of the same battery cell. The first connector 21 is provided between the first series group 11 and the second series group 12 and is used to connect the two second series rows 102 of the first series group 11 and the second series group 12 in series, thereby connecting the battery cell groups 51 corresponding to the first series group 11 and the second series group 12 in series, thereby realizing the integration between the battery cell groups 51 corresponding to the first series group 11 and the second series group 12.

[0032] 1 and 3 , first and second acquisition lines 13, 14 are located between first and second series rows 101, 102. First acquisition line 13 electrically connects first series rows 101 of first and second series groups 11, 12, while second acquisition line 14 electrically connects second series rows 102 of first and second series groups 11, 12. First and second acquisition lines 13, 14 are used to collect voltage and temperature signals, etc., of corresponding battery cell groups 51.

[0033] The series assembly 110 further includes two connection circuit boards 4 correspondingly connected to the first acquisition line 13 and the second acquisition line 14. The two connection circuit boards 4 are respectively arranged at one end of the first acquisition line 13 and the second acquisition line 14 to facilitate connection with the connector of the CSC assembly.

[0034] Referring to Figures 3 and 4,

[0035] The first collection line 13 includes two first connecting portions 131 and a first buffer portion 132 connected between the two first connecting portions 131. The two first connecting portions 131 are respectively connected to the two first series rows 101 of the first series group 11 and the second series group 12. The first buffer portion 132 has a first groove 133 facing the bracket 3. Along the extension direction of the first collection line 13, the distance between the first groove 133 and the first series row 101 of the first series group 11 is equal to the distance between the first groove 133 and the first series row 101 of the second series group 12.

[0036] The second collection line 14 includes two second connecting portions 141 and a second buffer portion 142 connected between the two second connecting portions 141. The two second connecting portions 141 are respectively connected to the two second series rows 102 of the first series group 11 and the second series group 12. The second buffer portion 142 has a second groove 143 facing the bracket 3. Along the extension direction of the second collection line 14, the distance between the second groove 143 and the second series row 102 of the first series group 11 is equal to the distance between the second groove 143 and the second series row 102 of the second series group 12. This ensures that both the first groove 133 and the second groove 143 are located between the first series row 101 and the second series row 102. When the battery cells of the battery module heat and expand, the tension exerted by the cells on the two first connecting portions 131 and the two second connecting portions 141 is as equal as possible. This allows the first buffer portion 132 and the second buffer portion 142 to expand significantly to better accommodate the cell expansion.

[0037] A virtual connecting line between the center of the first groove 133 and the center of the second groove 143 is perpendicular to the extending direction of the first collecting line 13 , so that the first buffer portion 132 and the second buffer portion 142 have the same extending direction.

[0038] The expansion of the battery cell is calculated through model simulation. For example, when the expansion of the battery cell is 1.5 mm, the length of the first buffer portion 132 and the second buffer portion 142 is twice the expansion of the battery cell, that is, 3.0 mm.

[0039] Referring to Figures 1 and 5,

[0040] Each first connector 21 is provided with a protrusion 24 facing away from the bracket 3. The first connector 21 is provided with two recesses 25 located on either side of the protrusion 24, with the two recesses 25 recessed toward the bracket 3, giving the first connector 21 a W-shaped structure. When the battery cell heats and expands, the first connector 21 can expand to accommodate the expansion of the battery cell. Furthermore, compared to a solution in which only one recess 25 is provided on the first connector 21, the protrusion 24 provided between the two recesses 25 can improve the structural strength of the first connector 21, minimizing the risk of the first connector 21 being broken and preventing plastic deformation. Based on actual battery cell expansion and tensile testing, the width and depth of the protrusion 24 and the two recesses 25 were determined. In this embodiment, the dimensions of the first connector 21 are 114.4 mm * 61 mm * 1.2 mm. The depth of the recess 25 and the height of the protrusion 24 are equal, both 3.5 mm. In this embodiment, the series assembly 110 is made of aluminum, and the bracket 3 is made of plastic.

[0041] Example 3

[0042] 1 and 7 , an embodiment of the present application further provides a battery module, comprising the battery module collection mechanism 1 , the battery cell grouping 5 , and the integrated connection assembly described in Embodiment 1 or 2.

[0043] There are two battery module collection mechanisms 1 and they correspond one to one with the two battery cell groups 5. The battery cell group 5 includes four battery cell groups 51. There are two collection groups 100, and one collection group 100 corresponds to two battery cell groups 51. The two battery cell groups 51 are electrically connected to the first series group 11 and the second series group 12 respectively.

[0044] The integrated connection assembly includes a first integrated part 22 and a second integrated part 23 .

[0045] When the first connecting member 21 connects the two first series rows 101 of the first series group 11 and the second series group 12, the first integrated member 22 connects the two second series rows 102 of the two collection groups 100, and the two second series rows 102 of the two first series groups 11 of the two battery module collection mechanisms 1 are connected to each other through the second integrated member 23. The second integrated member 23 is arranged on the side of the first series row 101 away from the first integrated member 22.

[0046] Alternatively, when the first connecting member 21 connects the two second series rows 102 of the first series group 11 and the second series group 12, the first integrated member 22 connects the two first series rows 101 of the two collection groups 100, and the two first series rows 101 of the two first series groups 11 of the two battery module collection mechanisms 1 are connected to each other through the second integrated member 23, and the second integrated member 23 is arranged on the side of the first series row 101 away from the first integrated member 22.

[0047] In this embodiment, the first connecting member 21 connects the two second series rows 102 of the first series group 11 and the second series group 12. At this time, the current flow of the battery module is as follows: in one of the collection groups 100, the current flows through the first series group 11 and the second series group 12 of the first series row 101 of adjacent battery cells in series, and passes through the battery cell group 51 corresponding to the first series group 11. Through the first connecting member 21, the current flows into a second series row 102 of the second series group 12 and passes through the battery cell group 51 corresponding to the second series group 12; then, through the first integrated member 22, the current flows into a first series row 101 of the first series group 11 in another collection group 100 and passes through the battery cell group 51 corresponding to the first series group 11; through the first connecting member 21, the current flows into a second series row 102 of the second series group 12 and passes through the battery cell group 51 corresponding to the second series group; finally, through the second integrated member 23, the current flows into a first series row 101 of the first series group 11 of another battery module collection mechanism 1.

[0048] In other embodiments, the two first connecting members 21 of the two collecting groups 100 can be connected to the two first series rows 101 or the two second series rows 102 respectively.

[0049] The four cell groups 51 are integrated through the first connector 21 and the first assembly 22, turning the original four battery modules into a single large module to increase energy density. By extending the acquisition line, the number of CSC components is reduced, thereby reducing the number of intermediate wiring harnesses.

[0050] In other embodiments, the number of cell groups 5 can be three, four, or even more. The number of battery module collection mechanisms 1 corresponding to the number of cell groups 5 can also be three, four, or even more. The cell groups 5 corresponding to different battery module collection mechanisms 1 are electrically connected via the second assembly 23, and different collection groups 100 are electrically connected via the first assembly 22.

[0051] Referring to Figure 6,

[0052] The bracket 3 is provided with four collection line installation slots 31 for installing the collection assembly 120. The bracket 3 is also provided with a connector installation slot 32 for installing the first connector 21. Both the collection line installation slot 31 and the connector installation slot 32 are designed to be conformal.

Claims

1. A battery module collection mechanism (1), comprising: Bracket (3); as well as A collection group (100) comprises a series assembly (110) and a collection assembly (120), wherein the series assembly (110) comprises a first series assembly (11) and a second series assembly (12) both mounted on the bracket (3), wherein the first series assembly (11) and the second series assembly (12) both comprise a first series row (101) and a second series row (102) opposite to each other, and the first series assembly (11) and the second series assembly (12) respectively correspond to a battery cell group (51); and the collection assembly (120) comprises a first collection line (13) and a second collection line (14) both mounted on the bracket (3) and opposite to each other. The two first series connection rows (101) of the first series connection group (11) and the second series connection group (12) are located on a side of the first collection line (13) away from the second collection line (14) and are electrically connected to the first collection line (13); the two second series connection rows (102) of the first series connection group (11) and the second series connection group (12) are located on a side of the second collection line (14) away from the first collection line (13) and are electrically connected to the second collection line (14).

2. The battery module collection mechanism (1) according to claim 1, wherein: The first collection line (13) comprises two first connection parts (131) and a first buffer part (132) connected between the two first connection parts (131), the two first connection parts (131) are respectively connected to the two first series connection rows (101) of the first series connection group (11) and the second series connection group (12), and the first buffer part (132) is provided with a first groove (133) facing the bracket (3); The second collection line (14) comprises two second connection parts (141) and a second buffer part (142) connected between the two second connection parts (141), the two second connection parts (141) are respectively connected to the two second series connection rows (102) of the first series connection group (11) and the second series connection group (12), and the second buffer part (142) is provided with a second groove (143) facing the bracket (3).

3. The battery module collection mechanism (1) according to claim 2, wherein: In the extension direction of the first collecting line (13), the distance between the first groove (133) and the first series row (101) of the first series group (11) is equal to the distance between the first groove (133) and the first series row (101) of the second series group (12); in the extension direction of the second collecting line (14), the distance between the second groove (143) and the second series row (102) of the first series group (11) is equal to the distance between the second groove (143) and the second series row (102) of the second series group (12).

4. The battery module collection mechanism (1) according to claim 3, wherein: A virtual connection line between the center of the second groove (143) and the center of the first groove (133) is perpendicular to the extension direction of the first collection line (13).

5. The battery module collection mechanism (1) according to any one of claims 1 to 5, wherein: The series connection assembly (110) further comprises a first connecting member (21) connecting the first series connection group (11) and the second series connection group (12).

6. The battery module collection mechanism (1) according to claim 5, wherein: The first connecting member (21) is connected between the two first series connection rows (101) of the first series connection group (11) and the second series connection group (12), or is connected between the two second series connection rows (102) of the first series connection group (11) and the second series connection group (12). The first connecting member (21) is provided with a protrusion (24) facing away from the bracket (3).

7. The battery module collection mechanism (1) according to claim 6, wherein: The first connecting member (21) is provided with two recesses (25) located on both sides of the protrusion (24), and the two recesses (25) are recessed toward the bracket (3).

8. A battery module, comprising at least two battery cell groups (5), and a battery module collection mechanism (1) according to any one of claims 1 to 7 having a corresponding number as the battery cell groups (51), wherein the battery cell group (5) comprises at least two battery cell groups (51), and the two battery cell groups (51) are electrically connected to the first series group (11) and the second series group (12), respectively; The series assembly (110) further comprises a first connector (21) connecting the first series group (11) and the second series group (12), wherein the first connector (21) connects the two battery cell groups (51) in series.

9. The battery module according to claim 8, further comprising an integrated connection component, wherein the integrated component further comprises a first integrated component (22), the battery cell grouping (5) comprises four battery cell groups (51), and the collection groups (100) are provided with two, and when the first connecting component (21) connects the two first series rows (101) of the first series group (11) and the second series group (12), the first integrated component (22) connects the two second series rows (102) of the two collection groups (100), and when the first connecting component (21) connects the two second series rows (102) of the first series group (11) and the second series group (12), the first integrated component (22) connects the two first series rows (101) of the two collection groups (100).

10. The battery module according to claim 9, wherein: The integrated component (120) further comprises a second integrated component (23), the second integrated component (23) being arranged on a side of the first series row (101) away from the first integrated component (22); when the first connecting component (21) connects the two first series rows (101) of the first series group (11) and the second series group (12), the two second series rows (102) of the two first series groups (11) of the two battery module collection mechanisms (1) are connected to each other via the second integrated component (23); when the first connecting component (21) connects the two second series rows (102) of the first series group (11) and the second series group (12), the two first series rows (101) of the two first series groups (11) of the two battery module collection mechanisms (1) are connected to each other via the second integrated component (23).

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