Information sampling unit and battery module

Abstract

The utility model relates to battery technical field especially information sampling unit and battery module are provided, the information sampling unit in this battery module includes connecting piece, busbar, sampling wire harness and plastic frame, plastic frame clamps and fixes battery monomer, busbar is configured as series connection and / or parallel adjacent two battery monomers, sampling wire harness's signal output end is fixedly connected with battery management system, connecting piece includes the first connecting portion and second connecting portion who links, the first connecting portion is fixedly connected with the signal acquisition end of sampling wire harness, plastic frame has the installation passageway, the second connecting portion is movable and is arranged in the installation passageway along the axial direction of installation passageway, the second connecting portion has the clamping structure, busbar has the welding portion fixedly arranged in the installation passageway, the clamping structure and welding portion are fixedly connected along the axial direction of installation passageway, realize the firm fixing position of connecting piece and busbar, guarantee the welding quality of connecting piece and busbar, eliminate the security risk caused by the poor welding of connecting piece and busbar.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an information sampling unit and a battery module. Background Technology

[0002] Battery modules connect multiple batteries in series and / or parallel using busbars. To ensure the safe use of battery modules, a battery management system is required to monitor the operating status of each battery in real time.

[0003] In related technologies, a data acquisition harness is used to connect the busbar and the battery management system. Specifically, one axial end of the data acquisition harness is connected to the battery management system, and the other axial end is fixed with a nickel strip, which is welded to the busbar. During the welding process, the data acquisition harness, under its own stress, can cause the nickel strip to move, leading to poor welding between the nickel strip and the busbar. This affects the normal acquisition of battery data and poses a safety hazard.

[0004] Therefore, there is an urgent need to invent information sampling units and battery modules to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an information sampling unit and a battery module to achieve a firm positioning of the connecting piece and the busbar, ensure the quality of subsequent welding, and eliminate safety hazards caused by poor welding of the connecting piece and the busbar.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Information sampling unit, including:

[0008] Plastic frame, used to clamp and fix individual battery cells;

[0009] The busbar is configured to connect two adjacent battery cells in series and / or in parallel;

[0010] A sampling harness, one axial end of which is fixedly connected to the battery management system; and

[0011] The connecting piece includes a first connecting part and a second connecting part connected to each other, wherein the first connecting part is fixedly connected to the other axial end of the sampling wire harness;

[0012] The plastic frame has an installation channel, and the second connecting part is movably inserted through the installation channel along the axial direction of the installation channel. The second connecting part has a locking structure, and the busbar has a welding part inserted and fixed to the installation channel. The locking structure and the welding part are locked and fixed along the axial direction of the installation channel.

[0013] As an optional solution, the locking structure includes:

[0014] The first main body section extends axially along the mounting channel;

[0015] The first extension segment includes a first end and a second end opposite to each other, the first end being connected to the first main body segment, and the second end extending in a direction away from the first main body segment;

[0016] The second extension section includes a third end and a fourth end opposite to each other, the third end being connected to the second end, and the fourth end extending along the axial direction of the mounting channel while tilting toward the direction of the first main body section.

[0017] The first main body segment, the first extension segment, and the second extension segment together form a snap-fit ​​space, and the welded part is snap-fitted and fixed in the snap-fit ​​space.

[0018] As an alternative, the second extension can undergo elastic deformation, and the minimum vertical distance between the second extension and the first main body segment is less than the minimum thickness of the welded portion in that direction.

[0019] As an optional solution, the locking structure further includes:

[0020] The third extension includes a fifth end and a sixth end, the fifth end being connected to the fourth end, and the sixth end extending axially along the mounting channel while tilting away from the first main body section.

[0021] As an optional solution, the first main body segment, the first extension segment, the second extension segment, and the third extension segment are integrally formed;

[0022] And / or, the first connecting portion and the second connecting portion are integrally formed.

[0023] As an optional solution, the first connecting part has a snap-fit ​​groove, and the signal acquisition end is snapped into the snap-fit ​​groove.

[0024] As an optional solution, the first connecting part includes a second main body segment extending along a preset direction. One end of the second main body segment along the preset direction is connected to the second connecting part. The second main body segment is provided with flanges on both sides along the preset direction. The flanges on both sides are folded towards the same side. The flanges on both sides and the second main body segment together form the snap-fit ​​groove.

[0025] As an optional solution, the busbar is provided with a fixing hole, and the information sampling unit further includes a fixing member, which passes through the fixing hole and is detachably fixed to the plastic frame.

[0026] As an optional solution, the sampling harness includes:

[0027] A wire harness body, wherein one axial end of the wire harness body is the signal output terminal; and

[0028] Multiple wire harness branches, one axial end of each wire harness branch is fixedly connected to the wire harness body, and the other axial end of each wire harness branch is the signal acquisition end, and each signal acquisition end corresponds to one bus.

[0029] A battery module includes a housing, a battery management system, battery cells, and an information sampling unit as described above. The housing has a cavity for accommodating the battery management system, the battery cells, and the information sampling unit.

[0030] The beneficial effects of this utility model are:

[0031] The information sampling unit provided by this utility model achieves stable storage of battery cells by using a plastic frame to clamp and fix the battery cells. By using a busbar to connect two adjacent battery cells in series and / or in parallel, multiple battery cells can be integrated together to meet actual power consumption needs. By fixing the signal output end of the sampling harness to the battery management system and fixing the signal acquisition end of the sampling harness to the first connecting part of the connecting piece, and by opening an installation channel in the plastic frame, the second connecting part in the connecting piece passes through the installation channel along the axial direction of the installation channel. Combined with the snap-fit ​​fixing of the second connecting part and the welding part in the busbar along the axial direction of the installation channel, and the fixing of the welding part through the installation channel, the positioning and fixing of the second connecting part and the welding part can be achieved, thereby achieving a firm positioning of the connecting piece and the busbar, ensuring the welding quality of the subsequent connecting piece and the busbar, and eliminating safety hazards caused by poor welding of the connecting piece and the busbar.

[0032] This utility model also provides a battery module that, by applying the aforementioned information sampling unit, enables real-time monitoring of the working status of each battery cell, thereby ensuring the safety of the battery module. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0034] Figure 2 This is an exploded view of the battery module provided in this embodiment of the utility model;

[0035] Figure 3 yes Figure 1 A magnified view of a section at point A in the middle;

[0036] Figure 4 This is a first structural schematic diagram of the connecting piece, wire harness branch, and busbar provided in this embodiment of the utility model;

[0037] Figure 5 This is a second structural schematic diagram of the connecting piece, wire harness branch, and busbar provided in an embodiment of the present utility model;

[0038] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0039] Figure 7 This is a first structural schematic diagram of the connecting piece provided in an embodiment of the present utility model;

[0040] Figure 8 This is a schematic diagram of the second structure of the connecting piece provided in this embodiment of the utility model.

[0041] In the picture:

[0042] 100. Connecting piece; 110. First connecting part; 111. First flange; 112. Second flange; 113. First snap-fit ​​groove; 114. Second snap-fit ​​groove; 115. Second main body section; 120. Second connecting part; 121. Fastening structure; 1211. First extension section; 1212. Second extension section; 1213. Third extension section; 1214. First main body section;

[0043] 200. Sampling harness; 210. Harness branch; 220. Harness body;

[0044] 300. Busbar; 310. Welded section; 320. Mounting hole;

[0045] 400. Plastic frame; 410. Installation channel;

[0046] 2000, battery cell. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0048] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0051] This embodiment provides a battery module. The battery module includes a housing and individual battery cells. The housing has a receiving cavity for accommodating the individual battery cells.

[0052] To ensure the safe use of the battery module, the battery module provided in this embodiment also includes a battery management system. The battery management system is housed within a housing cavity and monitors the operating status of each individual battery cell in real time. In existing technologies, battery cells are connected in series and / or parallel using busbars, and a data acquisition harness is used to connect the busbars and the battery management system. Specifically, one axial end of the data acquisition harness is connected to the battery management system, and the other axial end of the data acquisition harness is fixed with a nickel plate, which is welded to the busbar. During the welding process, the data acquisition harness, under its own stress, can cause the nickel plate to move, leading to poor welding between the nickel plate and the busbar. This affects the normal acquisition of information data from the battery cells, posing a safety hazard.

[0053] To address the aforementioned issues, the battery module provided in this embodiment further includes an information sampling unit housed within a receiving cavity. This information sampling unit enables real-time and stable monitoring of the working status of individual battery cells within the battery management system.

[0054] Specifically, such as Figures 1-5As shown, the information sampling unit includes a sampling harness 200, a connecting piece 100, a busbar 300, and a plastic frame 400. The plastic frame 400 is used to clamp and fix the battery cells 2000. The busbar 300 is configured to connect two adjacent battery cells 2000 in series and / or in parallel. The signal output end of the sampling harness 200 is fixedly connected to the battery management system. The connecting piece 100 includes a first connecting part 110 and a second connecting part 120 connected to each other. The first connecting part 110 is fixedly connected to the signal acquisition end of the sampling harness 200. The plastic frame 400 has an installation channel 410. The second connecting part 120 is movably inserted through the installation channel 410 along the axial direction of the installation channel 410 and has a locking structure 121. The busbar 300 has a welding part 310 inserted and fixed to the installation channel 410. The locking structure 121 and the welding part 310 are locked and fixed along the axial direction of the installation channel 410.

[0055] This information sampling unit uses a plastic frame 400 to clamp and fix the battery cells 2000, achieving stable storage of the battery cells 2000. By using a busbar 300 to connect two adjacent battery cells 2000 in series and / or parallel, multiple battery cells 2000 can be integrated together to meet actual power consumption needs. The signal output terminal of the sampling harness 200 is fixedly connected to the battery management system, and the signal acquisition terminal of the sampling harness 200 is fixedly connected to the first connecting part 110 of the connecting piece 100. An installation channel 410 is provided within the plastic frame 400, allowing the connecting piece 100 to... The second connecting part 120 is inserted through the mounting channel 410 along its axial direction. Combined with the snap-fit ​​fixing of the second connecting part 120 and the welding part 310 within the busbar 300 along the axial direction of the mounting channel 410, and the insertion and fixing of the welding part 310 into the mounting channel 410, the second connecting part 120 and the welding part 310 can be positioned and fixed. This achieves a firm positioning of the connecting piece 100 and the busbar 300, ensuring the subsequent welding quality of the connecting piece 100 and the busbar 300, and eliminating safety hazards caused by poor welding of the connecting piece 100 and the busbar 300. Furthermore, the battery module provided in this embodiment, by applying the aforementioned information sampling unit, can achieve real-time monitoring of the working status of each battery cell 2000, ensuring the safety of the battery module.

[0056] Optionally, such as Figure 4 and Figure 5 As shown, the busbar 300 has a fixing hole 320, and the information sampling unit also includes a fixing component. The fixing component passes through the fixing hole 320 and is detachably fixed to the plastic frame 400. It should be noted that in this embodiment, the fixing component is a bolt, and the plastic frame 400 has a threaded hole. The bolt's shank passes through the fixing hole 320 and is threaded into the threaded hole.

[0057] Furthermore, in this embodiment, each busbar 300 is provided with five fixing holes 320, each fixing hole 320 corresponding to a threaded hole and a bolt, to further improve the fixing effect between the busbar 300 and the plastic frame 400. In other embodiments, the specific number of fixing holes 320 in each busbar 300 can be adjusted according to actual needs; this embodiment does not impose a specific limitation.

[0058] In this embodiment, the busbar 300 is an aluminum busbar. In other embodiments, the busbar 300 may also be a copper busbar or other structures with conductive functions; this embodiment does not impose any specific limitations.

[0059] Because the battery module contains multiple battery cells 2000, and the busbar 300 is used to connect two adjacent battery cells 2000 in series and / or in parallel, the battery module contains multiple busbars 300. Therefore, as... Figure 2 As shown, the sampling harness 200 includes a harness body 220 and multiple harness branches 210. One axial end of the harness body 220 is a signal output end, and one axial end of each harness branch 210 is fixedly connected to the harness body 220. The other axial end of each harness branch 210 is a signal acquisition end, and each signal acquisition end corresponds to a bus 300. It should be noted that in this embodiment, the battery module has 30 busbars 300, so the sampling harness 200 has 30 harness branches 210, and each harness branch 210 is connected to a busbar 300. In other embodiments, the specific number of battery cells 2000 in the battery module can be adjusted according to actual needs, and the specific number of busbars 300 and harness branches 210 can be adjusted accordingly. This embodiment does not impose specific limitations.

[0060] In one of the alternative solutions, such as Figures 6-8As shown, the locking structure 121 includes a first main body segment 1214, a first extension segment 1211, and a second extension segment 1212. The first main body segment 1214 extends axially along the mounting channel 410. The first extension segment 1211 includes a first end and a second end opposite to each other. The first end is connected to the first main body segment 1214, and the second end extends in a direction away from the first main body segment 1214. The second extension segment 1212 includes a third end and a fourth end opposite to each other. The third end is connected to the second end, and the fourth end extends axially along the mounting channel 410 while tilting towards the first main body segment 1214. The first main body segment 1214, the first extension segment 1211, and the second extension segment 1212 together form a locking space. The welding part 310 is locked and fixed in the locking space. By setting a first main body segment 1214 extending axially along the mounting channel 410, connecting the first end of the first extension segment 1211 to the first main body segment 1214, and extending the second end of the first extension segment 1211 opposite to the first end in a direction away from the first main body segment 1214, combining the connection of the third end of the second extension segment 1212 to the second end, and the fourth end of the second extension segment 1212 opposite to the third end extending axially along the mounting channel 410 while tilting towards the first main body segment 1214, the first main body segment 1214, the first extension segment 1211 and the second extension segment 1212 together form a U-shaped snap-fit ​​space, and the size of the U-shaped opening in the U-shaped snap-fit ​​space is the smallest, so that the welding part 310 can extend into the U-shaped opening of the snap-fit ​​space and snap-fit ​​and fix it in the snap-fit ​​space along the axial direction of the mounting channel 410. It should be noted that in this embodiment, the first main body segment 1214 and the second connecting part 120 are on the same plane and the first main body segment 1214 and the second connecting part 120 are integrally formed. The two ends of the first main body segment 1214 that are disposed opposite to each other are connected to the second connecting part 120 and the first connecting part 110, respectively.

[0061] Specifically, the second extension segment 1212 can undergo elastic deformation, and the minimum vertical distance between the second extension segment 1212 and the first main body segment 1214 is less than the minimum thickness of the welded portion 310 in that direction. That is, the minimum vertical distance between the two U-shaped sidewalls of the snap-fit ​​space is less than the minimum thickness of the welded portion 310 in the same direction. When it is necessary to clamp and fix the locking structure 121 and the welding part 310 along the axial direction of the mounting channel 410, the elastic deformation of the second extension section 1212 is used to first open the U-shaped opening along the direction in which the second extension section 1212 and the first main body section 1214 are relatively set, that is, the radial direction of the mounting channel 410. Then, the welding part 310 is inserted into the locking space along the U-shaped opening. Then, the second extension section 1212 is released. At this time, the second extension section 1212 will return to its original position under its own elastic force. Since the welding part 310 has been inserted into the locking space along the U-shaped opening, the second extension section 1212 cannot be completely moved and returned to its original position. However, the second extension section 1212 can use its own elasticity to clamp and fix the welding part 310 together with the first main body section 1214, thereby realizing the clamping and fixing of the locking structure 121 and the welding part 310 along the axial direction of the mounting channel 410.

[0062] It should be noted that, in this embodiment, the first connecting portion 110 and the second connecting portion 120 in the connecting piece 100 are arranged sequentially along the axial direction of the mounting channel 410, and the second extension 1212 extends away from the first connecting portion 110 along the axial direction of the mounting channel 410, so that the U-shaped opening of the snap-fit ​​space faces away from the first connecting portion 110, so as to ensure that the snap-fit ​​structure 121 and the welding portion 310 will not interfere with the first connecting portion 110 when snap-fitted and fixed, and to ensure the normal operation of the connecting piece 100.

[0063] To facilitate the entry of the welding part 310 into the snap-fit ​​space, in this embodiment, the snap-fit ​​structure 121 further includes a third extension section 1213. The third extension section 1213 includes a fifth end and a sixth end, the fifth end being connected to the fourth end, and the sixth end extending axially along the mounting channel 410 while tilting away from the first main body section 1214. By connecting the fourth end of the second extension section 1212 to the fifth end of the third extension section 1213, the sixth end of the third extension section 1213, which is opposite to the fifth end, extends axially along the mounting channel 410 while tilting away from the first main body section 1214. This creates a guiding space between the third extension section 1213 and the first main body section 1214, and the vertical distance between the third extension section 1213 and the first main body section 1214 gradually increases as it extends away from the second extension section 1212, providing guidance for the welding part 310 to enter the snap-fit ​​space, thus facilitating its entry.

[0064] Furthermore, in this embodiment, the first main body segment 1214, the first extension segment 1211, the second extension segment 1212, and the third extension segment 1213 are integrally formed to improve the processing efficiency of the locking structure 121. Specifically, the locking structure 121 is formed by punching and bending steel sheets. The first main body segment 1214, the first extension segment 1211, the second extension segment 1212, and the third extension segment 1213 are obtained by punching, shearing, and bending the steel sheets. In other embodiments, the first main body segment 1214, the first extension segment 1211, the second extension segment 1212, and the third extension segment 1213 can also be processed separately and then assembled into the locking structure 121. This embodiment does not impose a specific limitation.

[0065] In one alternative embodiment, the first connecting portion 110 has a snap-fit ​​groove extending along a preset direction, and the signal acquisition segment of the wire harness branch 210 is snapped and fixed in the snap-fit ​​groove with its own axis aligned with the preset direction. By providing a snap-fit ​​groove in the first connecting portion 110, the signal acquisition end of the sampling wire harness 200 is snapped and fixed in the snap-fit ​​groove with its own axis aligned with the preset direction, thereby achieving a secure connection between the signal acquisition end of the wire harness branch 210 and the first connecting portion 110.

[0066] Specifically, such as Figure 7 and Figure 8 As shown, the first connecting portion 110 includes a second main body segment 115 extending along a preset direction. One end of the second main body segment 115 along the preset direction is connected to the first main body segment 1214 within the second connecting portion 120. Flanges are respectively provided on both sides of the second main body segment 115 along the preset direction, and both flanges are folded towards the same side. The flanges on both sides and the second main body segment 115 together form a snap-fit ​​groove. It should be noted that in this embodiment, the preset direction is the axial direction of the mounting channel 410. The second main body segment 115 is provided with a first flange structure and a second flange structure at intervals along a preset direction. The first flange structure includes two first flanges 111 respectively disposed on both sides of the second main body segment 115 along the preset direction. The first flange structure and the second main body segment 115 together form a first snap-fit ​​groove 113. The second flange structure includes two second flanges 112 respectively disposed on both sides of the second main body segment 115 along the preset direction. The second flange structure and the second main body segment 115 together form a second snap-fit ​​groove 114. The first snap-fit ​​groove 113 and the second snap-fit ​​groove 114 are coaxially arranged along the preset direction so that the first snap-fit ​​groove 113 and the second snap-fit ​​groove 114 together snap-fit ​​the signal acquisition end of the fixed wire harness branch 210. In other embodiments, the specific direction of the preset direction and the specific number of flange structures can also be adjusted according to actual needs. This embodiment does not make specific limitations.

[0067] In this embodiment, the flange and the second main body segment 115 are integrally formed to improve the processing efficiency of the first connecting portion 110. Specifically, the flange is formed by punching and bending the second main body segment 115. In other embodiments, the flange and the second main body segment 115 can also be processed separately, and then the processed flange and the second main body segment 115 can be assembled together. This embodiment does not make a specific limitation. In addition, the first connecting portion 110 and the second connecting portion 120 are integrally formed, and the first connecting portion 110 and the second connecting portion 120 are integrally punched and bent to improve the overall processing efficiency of the connecting piece 100. Moreover, in other embodiments, the first connecting portion 110 and the second connecting portion 120 can also be processed separately, and then the processed first connecting portion 110 and the second connecting portion 120 can be assembled together.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An information sampling unit, characterized in that, include: Plastic frame (400) for clamping and fixing individual battery cells (2000); Busbar (300) is configured to connect two adjacent battery cells (2000) in series and / or in parallel; A sampling harness (200), the signal output terminal of which is fixedly connected to the battery management system; and The connecting piece (100) includes a first connecting part (110) and a second connecting part (120) connected to each other, wherein the first connecting part (110) is fixedly connected to the signal acquisition end of the sampling harness (200); The plastic frame (400) has an installation channel (410), and the second connecting part (120) is movably inserted through the installation channel (410) along the axial direction of the installation channel (410). The second connecting part (120) has a locking structure (121), and the busbar (300) has a welding part (310) inserted and fixed to the installation channel (410). The locking structure (121) and the welding part (310) are locked and fixed along the axial direction of the installation channel (410).

2. The information sampling unit according to claim 1, characterized in that, The locking structure (121) includes: The first main body segment (1214) extends axially along the mounting channel (410); The first extension segment (1211) includes a first end and a second end opposite to each other, the first end being connected to the first main body segment (1214), and the second end extending in a direction away from the first main body segment (1214); The second extension section (1212) includes a third end and a fourth end opposite to each other, the third end being connected to the second end, and the fourth end extending along the axial direction of the mounting channel (410) while tilting toward the first main body section (1214); The first main body segment (1214), the first extension segment (1211), and the second extension segment (1212) together form a snap-fit ​​space, and the welding part (310) is snap-fitted and fixed in the snap-fit ​​space.

3. The information sampling unit according to claim 2, characterized in that, The second extension segment (1212) can undergo elastic deformation, and the minimum vertical distance between the second extension segment (1212) and the first main body segment (1214) is less than the minimum thickness of the welded portion (310) in that direction.

4. The information sampling unit according to claim 2, characterized in that, The locking structure (121) also includes: The third extension segment (1213) includes a fifth end and a sixth end opposite to each other, the fifth end being connected to the fourth end, and the sixth end extending axially along the mounting channel (410) while tilting away from the first main body segment (1214).

5. The information sampling unit according to claim 4, characterized in that, The first main body segment (1214), the first extension segment (1211), the second extension segment (1212), and the third extension segment (1213) are integrally formed; And / or, the first connecting part (110) and the second connecting part (120) are integrally formed.

6. The information sampling unit according to any one of claims 1 to 5, characterized in that, The first connecting part (110) has a snap-fit ​​groove, and the signal acquisition end is snapped into the snap-fit ​​groove.

7. The information sampling unit according to claim 6, characterized in that, The first connecting part (110) includes a second main body section (115) extending along a preset direction. One end of the second main body section (115) along the preset direction is connected to the second connecting part (120). The second main body section (115) is provided with flanges on both sides along the preset direction. The flanges on both sides are folded towards the same side. The flanges on both sides and the second main body section (115) together form the snap-fit ​​groove.

8. The information sampling unit according to any one of claims 1 to 5, characterized in that, The busbar (300) has a fixing hole (320), and the information sampling unit also includes a fixing member, which passes through the fixing hole (320) and is detachably fixed to the plastic frame (400).

9. The information sampling unit according to any one of claims 1 to 5, characterized in that, The sampling harness (200) includes: A wire harness body (220), one axial end of which is the signal output terminal; and Multiple wire harness branches (210) are provided, with one axial end of each wire harness branch (210) fixedly connected to the wire harness body (220), and the other axial end of each wire harness branch (210) being the signal acquisition end. Each signal acquisition end corresponds to one bus (300).

10. A battery module, characterized in that, The device includes a housing, a battery management system, a battery cell (2000), and an information sampling unit as claimed in any one of claims 1 to 9. The housing has a cavity for accommodating the battery management system, the battery cell (2000), and the information sampling unit.

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