Battery cell connection assembly and battery module

Abstract

This utility model provides a cell connection assembly and a battery module. The cell connection assembly includes: multiple busbars for connecting multiple cells in series; a flexible circuit board extending along a first direction; and multiple acquisition chips spaced apart along the first direction. The flexible circuit board includes a body and connection terminals, with the acquisition chips connected between the busbars and the connection terminals. At least a portion of the connection terminals is configured to float relative to the body, allowing the connection terminals to adapt to the position of the acquisition chips. In embodiments of this utility model, by using a flexible circuit board, the advantages of integrated design allow for the simultaneous implementation of multiple signal transmission lines, reducing layout difficulty and improving the assembly efficiency of the cell connection assembly. Simultaneously, the floating configuration of the connection terminals can better accommodate positional errors of the acquisition chips.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a cell connection component and a battery module. Background Technology

[0002] Cell connection assemblies are an important component of battery modules in electric vehicles. They are used to connect individual battery cells or to external electrical devices, and also to collect information such as cell voltage and temperature.

[0003] In related technologies, the cell connection assembly includes a busbar for connecting cells in series and a signal acquisition harness. The signal acquisition harness is used to acquire information such as the voltage and temperature of the cells. However, due to the limitations of the signal acquisition harness, the assembly efficiency is low. Utility Model Content

[0004] The present invention provides a cell connection assembly and a battery module to at least partially solve the above-mentioned technical problems.

[0005] In a first aspect, embodiments of the present invention provide a cell connection assembly, comprising:

[0006] Multiple busbars are used to connect multiple battery cells in series;

[0007] A flexible circuit board is provided extending along a first direction;

[0008] Multiple acquisition chips are spaced apart along the first direction;

[0009] The flexible circuit board includes a body and a connection terminal, and the acquisition chip is connected between the busbar and the connection terminal;

[0010] At least a portion of the connection terminal is configured to float relative to the body so that the connection terminal can adapt to the position of the acquisition chip.

[0011] Optionally, in some embodiments of this application, the connection terminal includes:

[0012] The first connecting part is connected to the main body;

[0013] The second connecting part is connected to the acquisition piece;

[0014] Wherein, an isolation space is formed between the second joint portion and the body, and the isolation space extends through the flexible circuit board along the second direction;

[0015] The second direction intersects with the first direction.

[0016] Optionally, in some embodiments of this application, the connecting terminal further comprises:

[0017] The first groove extends through the flexible circuit board along the second direction;

[0018] The first groove is disposed on the side of the first joint near the isolation space, so that the width of the first joint in the third direction is smaller than the width of the second joint in the third direction;

[0019] The third direction intersects with the first direction and the second direction respectively;

[0020] And / or,

[0021] The connection terminal also has:

[0022] The second groove extends through the flexible circuit board along the second direction;

[0023] The second groove is disposed on the side of the first joint away from the isolation space, so that the width of the first joint in the third direction is smaller than the width of the second joint in the third direction;

[0024] The third direction intersects with the first direction and the second direction, respectively.

[0025] Optionally, in some embodiments of this application, the second joint extends along the first direction, and at least a portion of the second joint is embedded in the body.

[0026] Optionally, in some embodiments of this application, the body has:

[0027] Clearance space is provided to allow space to be cleared from the location of the explosion-proof valve of the battery cell;

[0028] The clearance space extends through the body along the second direction;

[0029] The second direction intersects with the first direction.

[0030] Optionally, in some embodiments of this application, the body includes:

[0031] Two extensions are respectively located on both sides of the avoidance space along a third direction;

[0032] The busbar section is used to install external terminals;

[0033] The busbar is located at the end of the extension, and the two extensions are respectively connected to the busbar.

[0034] The third direction intersects with the first direction and the second direction, respectively.

[0035] Optionally, in some embodiments of this application, the busbar includes:

[0036] The first part is connected to each of the two extensions;

[0037] The second part is configured to install external terminals;

[0038] The first part extends along the first direction and intersects with the second part.

[0039] Optionally, in some embodiments of this application, the acquisition chip has:

[0040] At least one through hole is provided through the acquisition plate;

[0041] Wherein, on the projection plane perpendicular to the second direction, the projection of the hole wall of the through hole is inside the projection of the connection terminal or the projection of the busbar;

[0042] The second direction intersects with the first direction.

[0043] Optionally, in some embodiments of this application, the cell connection assembly further includes:

[0044] A support member for providing support for at least a portion of the body;

[0045] Wherein, on the projection plane perpendicular to the second direction, the projection of the support member is inside the projection of the main body;

[0046] The second direction intersects with the first direction.

[0047] Optionally, in some embodiments of this application, the support member has:

[0048] A clearance groove extends through the support member along the second direction;

[0049] The avoidance groove is provided corresponding to the connection terminal so as to avoid the connection terminal when the connection terminal floats relative to the body.

[0050] Optionally, in some embodiments of this application, the cell connection assembly further includes:

[0051] An isolation substrate is used at least for mounting the busbar and the flexible circuit board;

[0052] At least two gaskets are spaced apart along the first direction;

[0053] The gasket is located on the side of the isolation substrate away from the flexible circuit board, and the gasket is provided with a first pressure relief hole corresponding to the explosion-proof valve of the battery cell.

[0054] On a projection plane perpendicular to the second direction, the projection of the pad at least partially overlaps with the projection of the flexible circuit board;

[0055] The second direction intersects with the first direction.

[0056] Secondly, embodiments of this utility model provide a battery module, including a battery cell and a battery cell connection assembly as described above.

[0057] The beneficial effects of the embodiments of this utility model are as follows:

[0058] In this embodiment of the invention, by using a flexible circuit board, the advantages of integrated design allow for the simultaneous implementation of multiple signal transmission lines, reducing layout difficulty and thus improving the assembly efficiency of the cell connection components. Simultaneously, the floating design of the connection terminals effectively accommodates positional errors of the data acquisition chip. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 This is a three-dimensional schematic diagram of the battery module provided in an embodiment of this utility model;

[0061] Figure 2 This is a three-dimensional schematic diagram of the battery cell connection assembly provided in an embodiment of this utility model;

[0062] Figure 3 This is a top view of the battery cell connection assembly provided in an embodiment of this utility model;

[0063] Figure 4 yes Figure 3 Enlarged view of section A;

[0064] Figure 5 This is a three-dimensional schematic diagram from another perspective of the battery cell connection assembly provided in an embodiment of this utility model;

[0065] Figure 6 This is an exploded view of the battery cell connection assembly provided in an embodiment of this utility model;

[0066] Figure 7 This is a perspective view of a portion of the battery cell connection assembly provided in an embodiment of the present invention;

[0067] Figure 8This is a perspective view of another part of the battery cell connection assembly provided in an embodiment of the present invention;

[0068] Figure 9 yes Figure 8 Enlarged view of section B;

[0069] Figure 10 This is a three-dimensional schematic diagram of the support member in the battery cell connection assembly provided in an embodiment of this utility model.

[0070] Explanation of reference numerals in the attached figures:

[0071] 100. Cell connection assembly;

[0072] 110. Busbar;

[0073] 120. Flexible circuit board;

[0074] 121. Main body; 121a. Extension; 121b. Convergence section; M1. First part; M2. Second part;

[0075] 122, connecting terminal; 122a, first connecting portion; 122b, second connecting portion; N1, first groove; N2, second groove;

[0076] 120a. Isolation space; 120b. Clearance space;

[0077] 130. Acquisition plate; 131. Through hole; 140. External terminal; 150. Support component; 151. Alternating groove;

[0078] 160. Gasket; 161. First pressure relief hole; 170. Isolation substrate; 171. Mounting hole; 172. Second pressure relief hole;

[0079] 10. Battery module;

[0080] 210. Battery cell; 220. End plate; 230. Binding strap; 240. Mounting component. Detailed Implementation

[0081] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model.

[0082] In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative purposes and do not impose numerical requirements or establish a numerical order.

[0083] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.

[0084] Firstly, referring to Figures 1 to 4 This application provides a battery cell connection assembly 100, including: a busbar 110, a flexible circuit board 120, and a data acquisition chip 130.

[0085] Specifically, multiple busbars 110 are provided, and multiple busbars 110 are combined to connect multiple battery cells 210 in series into a whole; a flexible printed circuit board 120 (FPC) extends along the first direction. The flexible printed circuit board 120 is a highly reliable and highly flexible printed circuit board made of polyimide or polyester film as a substrate, with good bending performance and reliability. Moreover, the flexible printed circuit board 120 has no exposed wire harness, which improves the overall aesthetics of the battery cell connection assembly 100. Multiple acquisition pieces 130 are provided, spaced apart along the first direction, and each acquisition piece 130 corresponds to one busbar 110.

[0086] It should be noted that the first direction here refers to the left and right directions only for the convenience of introducing specific embodiments of this application. There is no absolute correspondence between the first direction and the left and right directions. Similarly, there is no absolute correspondence between the second direction and the up and down directions, and between the third direction and the front and back directions. Furthermore, the first direction, second direction, and third direction of this application are only used to express relative positional relationships. They only indicate approximate locations, not absolute geometric relationships.

[0087] The flexible circuit board 120 in this embodiment includes a body 121 and a connection terminal 122. A data acquisition chip 130 is connected between the busbar 110 and the connection terminal 122 to achieve an electrical connection between the busbar 110 and the connection terminal 122, thereby acquiring voltage and temperature data of the battery cell 210. At least a portion of the connection terminal 122 is configured to float relative to the body 121 so that the connection terminal 122 can adapt to the position of the data acquisition chip 130.

[0088] It is understood that in this embodiment, a portion of the connecting terminal 122 is fixedly connected to the body 121, while the other portion is in a free state. This allows the connecting terminal 122 to deform under external force, meaning its shape can be adjusted as needed, thereby achieving a floating configuration of the connecting terminal 122 relative to the body 121. Furthermore, even if manufacturing and assembly errors in the busbar 110 and the acquisition piece 130 result in differences in the spatial positions of different acquisition pieces 130, the shape of the connecting terminal 122 can be adjusted to accommodate the position of the acquisition piece 130.

[0089] By adopting the above technical solution and setting up the flexible circuit board 120, the integrated design of the flexible circuit board 120 can simultaneously realize multiple signal transmission lines, reducing the difficulty of layout and thus improving the assembly efficiency of the cell connection assembly 100. At the same time, the floating setting of the connection terminal 122 can better adapt to the positional error of the acquisition chip 130.

[0090] In some specific implementations, the collecting sheet 130 can be a conductive metal sheet such as a nickel sheet, an aluminum sheet, or a copper sheet.

[0091] In some specific embodiments, the acquisition piece 130 is fixed to the busbar 110 and the connection terminal 122 by welding. To facilitate welding of the acquisition piece 130, in one example of this application, the acquisition piece 130 is a nickel sheet.

[0092] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The acquisition piece 130 has at least one through hole 131. The through hole 131 extends through the acquisition piece 130; on a projection plane perpendicular to the second direction, the projection of the hole wall of the through hole 131 is inside the projection of the connection terminal 122 or the busbar 110; the second direction intersects the first direction.

[0093] It is understood that during the welding process of the acquisition piece 130 to the connection terminal 122 or busbar 110, the through hole 131 is used to accommodate the welding material. The molten welding material cools in the through hole 131 and combines the acquisition piece 130 with the connection terminal 122 or busbar 110 to achieve the welding connection of the acquisition piece 130.

[0094] The through hole 131 can be provided only at the end of the acquisition piece 130 near the connection terminal 122, or only at the end of the acquisition piece 130 near the busbar, or through holes 131 can be provided at both ends of the acquisition piece 130.

[0095] By using this design, the molten welding material can be confined through the through-hole 131, thereby limiting the required weld shape, improving the stability and reliability of the welding, and facilitating the welding operation.

[0096] In one example of this application, reference is made to Figure 3 and Figure 4 A through hole 131 is provided at one end of the acquisition piece 130 near the connection terminal 122. The acquisition piece 130 and the connection terminal 122 are fixed by spot welding at the through hole 131, which can limit the position of the weld and thus reduce the impact on the connection terminal 122.

[0097] In some embodiments of this application, reference is made to Figures 2 to 4 The connecting terminal 122 includes a first connecting portion 122a and a second connecting portion 122b.

[0098] The first connector 122a is connected to the body 121, and the second connector 122b is connected to the acquisition chip 130. The signal current acquired by the acquisition chip 130 is transmitted to the body 121 along the second connector 122b and the first connector 122a in sequence. An isolation space 120a is formed between the second connector 122b and the body 121. The isolation space 120a extends through the flexible circuit board 120 in a second direction to separate the second connector 122b from the body 121. That is, the second connector 122b can be bent in the second direction. The second direction intersects with the first direction, or more specifically, the second direction is perpendicular to the first direction.

[0099] By adopting this scheme, the second joint 122b is floating along the second direction through the setting of the isolation space 120a, so that the second joint 122b can be adapted to the position of the acquisition piece 130 in the second direction.

[0100] In some embodiments of this application, reference is made to Figures 2 to 4 The connecting terminal 122 also has a first groove N1.

[0101] The first groove N1 extends through the flexible circuit board 120 along the second direction; the first groove N1 is disposed on the side of the first joint 122a near the isolation space 120a, such that the width of the first joint 122a in the third direction is smaller than the width of the second joint 122b in the third direction; the third direction intersects the first direction and the second direction respectively. More specifically, the third direction is perpendicular to the first direction and the second direction respectively.

[0102] It is understood that by setting the first groove N1, the width of the first joint 122a in the third direction can be reduced, making it easier for the connecting terminal 122 to bend and deform at the position of the first joint 122a, thereby enabling the second joint 122b to float in the third direction, so that the second joint 122b can be adapted to the position of the acquisition piece 130 in the third direction, further improving the adaptability of the connecting terminal 122.

[0103] In some specific embodiments, the first groove N1 is connected to the isolation space 120a, and the first groove N1 and the isolation space 120a can be formed by the same process, thereby improving processing efficiency.

[0104] In some embodiments of this application, reference is made to Figures 2 to 4 The connecting terminal 122 also has a second groove N2.

[0105] The second groove N2 extends through the flexible circuit board 120 along the second direction; the second groove N2 is disposed on the side of the first joint 122a away from the isolation space 120a, so that the width of the first joint 122a in the third direction is smaller than the width of the second joint 122b in the third direction.

[0106] It is understood that by setting the second groove N2, the width of the first joint 122a in the third direction can be reduced, making it easier for the connecting terminal 122 to bend and deform at the position of the first joint 122a, thereby enabling the second joint 122b to float in the third direction, so that the second joint 122b can be adapted to the position of the acquisition piece 130 in the third direction, further improving the adaptability of the connecting terminal 122.

[0107] It should be noted that the connection terminal 122 may be provided with only the first groove N1 or the second groove N2, or both the first groove N1 and the second groove N2 may be provided.

[0108] In one example of this application, the connecting terminal 122 is provided with both a first groove N1 and a second groove N2, which further improves the deformability of the first joint 122a.

[0109] In some embodiments of this application, reference is made to Figure 4 The second joint portion 122b extends along the first direction, and at least a portion of the second joint portion 122b is embedded in the body 121. With this arrangement, the overall width of the flexible circuit board 120 in the third direction can be reduced, thereby reducing the space occupied by the flexible circuit board 120.

[0110] In some specific implementation methods, refer to Figures 2 to 4 The edge of the connecting terminal 122 on the side away from the isolation space 120a is roughly flush with the edge of the body 121.

[0111] In some embodiments of this application, reference is made to Figure 2 , Figure 3 and Figure 7 The main body 121 has a clearance space 120b. The clearance space 120b is used to avoid the position of the explosion-proof valve of the battery cell 210; the clearance space 120b extends through the main body 121 in a second direction. By setting the clearance space 120b, the main body 121 can be prevented from obstructing the explosion-proof valve of the battery cell 210.

[0112] In some embodiments of this application, reference is made to Figure 2 and Figure 7 The main body 121 includes an extension 121a and a confluence portion 121b.

[0113] Two extensions 121a are provided, and the two extensions 121a are respectively disposed on both sides of the clearance space 120b along a third direction. That is, the clearance space 120b is a continuous elongated strip, which facilitates the processing and forming of the main body 121. The busbar 121b is used to install external terminals 140 to output the signals transmitted by the two extensions 121a; the busbar 121b is disposed at the end of the extension 121a, and the two extensions 121a are respectively connected to the busbar 121b.

[0114] In some embodiments of this application, reference is made to Figure 2 The busbar 121b includes a first portion M1 and a second portion M2. The first portion M1 is connected to two extensions 121a respectively; the second portion M2 is configured to mount an external terminal 140; the first portion M1 extends along a first direction and intersects with the second portion M2.

[0115] It is understood that the busbar 121b is bent so that it is composed of at least a first part M1 and a second part M2 located on different planes, wherein the first part M1 is arranged perpendicular to the vertical direction and the second part M2 is arranged perpendicular to the horizontal direction.

[0116] This approach avoids affecting the overall thickness of the battery cell 210 connection terminal 122 in the vertical direction due to the setting of the external terminal 140.

[0117] Specifically, the external terminal 140 can be a multi-pin connector used to transmit signals to the battery management system (BMS), and the specific number of pins is determined according to the actual number of batteries connected in series.

[0118] In some embodiments of this application, reference is made to Figure 6 , Figures 8 to 10The cell connection assembly 100 further includes a support member 150. The support member 150 is used to provide support for at least a portion of the body 121, that is, the flexible circuit board 120 is placed on the support member 150; on the projection plane perpendicular to the second direction, the projection of the support member 150 is inside the projection of the body 121, so as to prevent the support member 150 from extending beyond the edge of the body 121.

[0119] By setting the support member 150, the height of the flexible circuit board 120 in the vertical direction can be maintained, ensuring that the flexible circuit board 120 and the busbar 110 are as close to the same horizontal plane as possible, thereby facilitating the welding of the acquisition chip 130 to the flexible circuit board 120.

[0120] In some embodiments of this application, reference is made to Figure 9 and Figure 10 The support member 150 has a clearance groove 151. The clearance groove 151 extends through the support member 150 in a second direction; the clearance groove 151 is correspondingly provided with the connecting terminal 122 so as to avoid the connecting terminal 122 when the connecting terminal 122 floats relative to the body 121.

[0121] It is understood that by setting the clearance groove 151, when the connection terminal 122 floats relative to the body 121, the connection terminal 122 is allowed to deform in the direction of the support member 150, thereby avoiding the support member 150 from affecting the connection between the connection terminal 122 and the acquisition piece 130.

[0122] In some specific embodiments, two support members 150 are provided, and the two support members 150 correspond one-to-one with the two extensions 121a to provide support for the extensions 121a respectively.

[0123] In some embodiments of this application, reference is made to Figure 2 , Figure 5 and Figure 6 The cell connection assembly 100 also includes: an isolation substrate 170 and a gasket 160.

[0124] The isolation substrate 170 is used at least to mount the busbar 110 and the flexible circuit board 120. More specifically, the isolation substrate 170 is made of at least PC film, which can serve as insulation and protection. Furthermore, the isolation substrate 170 can pre-fix the busbar 110 before soldering. At least two gaskets 160 are provided, spaced apart along a first direction. The gaskets 160 are located on the side of the isolation substrate 170 away from the flexible circuit board 120, and each gasket 160 has a first pressure relief hole 161 corresponding to the explosion-proof valve of the battery cell 210. On a projection plane perpendicular to a second direction, the projection of the gasket 160 at least partially overlaps with the projection of the flexible circuit board 120. Specifically, the gasket 160 can be made of foam.

[0125] It is understandable that in order to facilitate the alignment of the multiple first pressure relief holes 161 in the gasket 160 with the explosion-proof valve of the battery cell 210, the use of multiple gaskets 160 can reduce the requirements for the machining accuracy of the first pressure relief holes 161.

[0126] In some embodiments of this application, reference is made to Figure 5 and Figure 6 The isolation substrate 170 is provided with a mounting hole 171 and a second pressure relief hole 172. The mounting hole 171 provides a channel for connecting the busbar 110 to the battery cell 210; the second pressure relief hole 172 corresponds to the explosion-proof valve of the battery cell 210. It can be understood that the first pressure relief hole 161, the second pressure relief hole 172, and the clearance space 120b are correspondingly provided.

[0127] Secondly, referring to Figure 1 This application provides a battery module 10, including a battery cell 210 and the aforementioned battery cell connection assembly 100. The battery module 10 possesses all the beneficial effects of the aforementioned battery cell connection assembly 100, which will not be elaborated upon here.

[0128] In some embodiments of this application, reference is made to Figure 1 The battery module 10 also includes: an end plate 220 and a strap 230; at least two end plates 220 are provided, and in a first direction, the end plates 220 are located at the ends of the whole formed by at least two cells 210; at least two straps 230 are provided, and each strap 230 is respectively bound to the outside of the cell 210 and the end plate 220 to bind the cell 210 and the end plate 220 into a whole.

[0129] It is understandable that by setting the end plate 220, the force of the strap 230 is first applied to the end plate 220, thereby applying pressure along the first direction from the end plate 220 to the cell 210, so as to avoid the cell 210 being directly damaged by the strap 230.

[0130] In some specific implementation methods, refer to Figure 1 and Figure 2 The busbar 121b of the flexible circuit board 120 is fixed to the end plate 220, thereby improving the stability of the busbar 121b and the external terminal 140. More specifically, a mounting member 240 is also provided between the second part M2 of the busbar 121b and the end plate 220 to provide support for the second part M2 of the busbar 121b and prevent the busbar 121b from being excessively deformed under stress.

[0131] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cell connection assembly (100), characterized in that, include: Multiple busbars (110) are used to connect multiple battery cells (210) in series; A flexible circuit board (120) is provided extending along a first direction; Multiple acquisition chips (130) are spaced apart along the first direction; The flexible circuit board (120) includes a body (121) and a connection terminal (122), and the acquisition chip (130) is connected between the busbar (110) and the connection terminal (122). At least a portion of the connection terminal (122) is configured to float relative to the body (121) so that the connection terminal (122) can adapt to the position of the acquisition chip (130).

2. The cell connection assembly (100) according to claim 1, characterized in that, The connection terminal (122) includes: The first connecting part (122a) is connected to the body (121); The second connecting part (122b) is connected to the acquisition piece (130); Wherein, an isolation space (120a) is formed between the second joint portion (122b) and the body (121), and the isolation space (120a) penetrates the flexible circuit board (120) along the second direction; The second direction intersects with the first direction.

3. The cell connection assembly (100) according to claim 2, characterized in that, The connecting terminal (122) also has: A first groove (N1) extends through the flexible circuit board (120) along the second direction; The first groove (N1) is disposed on the side of the first joint (122a) near the isolation space (120a) so that the width of the first joint (122a) in the third direction is smaller than the width of the second joint (122b) in the third direction; The third direction intersects with the first direction and the second direction respectively; And / or, The connecting terminal (122) also has: The second groove (N2) extends through the flexible circuit board (120) along the second direction; The second groove (N2) is disposed on the side of the first joint (122a) away from the isolation space (120a) so that the width of the first joint (122a) in the third direction is smaller than the width of the second joint (122b) in the third direction; The third direction intersects with the first direction and the second direction, respectively.

4. The cell connection assembly (100) according to claim 2, characterized in that, The second connecting portion (122b) extends along the first direction, and at least a portion of the second connecting portion (122b) is embedded in the body (121).

5. The cell connection assembly (100) according to any one of claims 1 to 4, characterized in that, The body (121) has: Clearance space (120b) for clearing the position of the explosion-proof valve of the battery cell (210); The clearance space (120b) extends through the body (121) along the second direction; The second direction intersects with the first direction.

6. The cell connection assembly (100) according to claim 5, characterized in that, The body (121) includes: Two extensions (121a) are respectively disposed on both sides of the clearance space (120b) along a third direction; The busbar (121b) is used to mount external terminals (140); The busbar (121b) is disposed at the end of the extension (121a), and the two extensions (121a) are respectively connected to the busbar (121b); The third direction intersects with the first direction and the second direction, respectively.

7. The cell connection assembly (100) according to claim 6, characterized in that, The busbar (121b) includes: The first part (M1) is connected to the two extensions (121a) respectively; The second part (M2) is configured to mount an external terminal (140); The first part (M1) extends along the first direction and intersects with the second part (M2).

8. The cell connection assembly (100) according to any one of claims 1 to 4, characterized in that, The acquisition chip (130) has: At least one through hole (131) is provided through the acquisition piece (130); Among them, on the projection plane perpendicular to the second direction, the projection of the hole wall of the through hole (131) is inside the projection of the connecting terminal (122) or the projection of the busbar (110); The second direction intersects with the first direction.

9. The cell connection assembly (100) according to any one of claims 1 to 4, characterized in that, The cell connection assembly (100) further includes: A support member (150) is provided to support at least a portion of the body (121); Among them, on the projection plane perpendicular to the second direction, the projection of the support member (150) is inside the projection of the body (121); The second direction intersects with the first direction.

10. The cell connection assembly (100) according to claim 9, characterized in that, The support member (150) has: A clearance groove (151) extends through the support member (150) along the second direction; The clearance groove (151) is provided corresponding to the connection terminal (122) so as to avoid the connection terminal (122) when the connection terminal (122) floats relative to the body (121).

11. The cell connection assembly (100) according to any one of claims 1 to 4, characterized in that, The cell connection assembly (100) further includes: An isolation substrate (170) is used at least for mounting the bus (110) and the flexible circuit board (120); At least two gaskets (160) are spaced apart along the first direction; The gasket (160) is located on the side of the isolation substrate (170) away from the flexible circuit board (120), and the gasket (160) is provided with a first pressure relief hole (161) corresponding to the explosion-proof valve of the battery cell (210). On a projection plane perpendicular to the second direction, the projection of the pad (160) at least partially overlaps with the projection of the flexible circuit board (120); The second direction intersects with the first direction.

12. A battery module (10), characterized in that, It includes a battery cell (210) and a battery cell connection assembly (100) as described in any one of claims 1 to 11.

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