Sampling structure of battery cell module and battery pack

Abstract

This invention relates to the field of battery manufacturing technology, providing a sampling structure for a cell module and a battery pack. The sampling structure includes a connecting strip and a flexible voltage acquisition board. The connecting strip is fixedly disposed on one side of the cell module and electrically connected to the terminal post of the cell module on the same side. The connecting strip has at least one connecting boss protruding outward. The voltage acquisition board is electrically connected to the connecting boss, and along the length direction of the cell module, the plate body of the voltage acquisition board and the plate body of the connecting strip are spaced apart to form a physically separated gap. This invention, by directly connecting the voltage acquisition board to the connecting strip, can significantly reduce the use of acquisition wiring harnesses. Furthermore, by connecting the flexible circuit board to the connecting boss, it can avoid the connection of traditional nickel sheets, reduce space occupation, and lower manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a sampling structure for a cell module and a battery pack. Background Technology

[0002] The mainboard of the battery management system inside the battery pack mainly connects the PCB board circuit and wiring harness through plug-in. The male end of the plug-in is soldered to the PCB board, and the female end is crimped onto the wiring harness. The process is complex, with many connecting parts, and is prone to problems such as terminal crimping, foreign objects in the terminal expansion holes, and problems such as intermittent connection and voltage acquisition jumps. Summary of the Invention

[0003] This invention provides a sampling structure for a battery cell module and a battery pack, which solves the problem that the voltage acquisition board has too many connecting wires and terminals in the prior art, resulting in complicated connection processes and easy terminal crimping defects.

[0004] This invention provides a sampling structure for a battery cell module, comprising: a connecting strip and a flexible voltage acquisition board; the connecting strip is fixedly disposed on one side of the battery cell module and electrically connected to the terminal post of the battery cell module on the same side, and the connecting strip is provided with at least one connecting boss protruding outward; the voltage acquisition board is electrically connected to the connecting boss, and along the length direction of the battery cell module, the plate body of the voltage acquisition board and the plate body of the connecting strip are spaced apart to form a physically separated gap.

[0005] According to the sampling structure of the battery cell module provided by the present invention, the connecting bar is further provided with an insulating support strip, which is in contact with the voltage acquisition board.

[0006] According to the sampling structure of the battery cell module provided by the present invention, along the length direction of the connecting bar, the length of the insulating support strip is the same as the length of the voltage acquisition board; the thickness of the insulating support strip is the same as the protrusion thickness of the connecting boss.

[0007] According to the sampling structure of the battery cell module provided by the present invention, in the height direction of the battery cell module, the insulating support strips are provided on both sides of the connecting boss, and the insulating support strips include supporting foam.

[0008] According to the sampling structure of the battery cell module provided by the present invention, the connecting bar is provided with a positioning hole, and the positioning hole is integrally formed with the connecting bar.

[0009] According to the sampling structure of the battery cell module provided by the present invention, an expansion absorption groove is integrally formed in the middle of the connecting bar.

[0010] According to the sampling structure of the battery cell module provided by the present invention, along the length direction of the battery cell module, the gap between the plate body of the voltage acquisition board and the plate body of the connecting bar is L, and L≥2mm.

[0011] According to the sampling structure of the battery cell module provided by the present invention, the voltage acquisition board includes a device layer and an insulating film layer connected to the opposite surface of the device layer. The insulating film layer has a connection hole, and the connection hole is correspondingly provided with each of the connection bosses.

[0012] According to the sampling structure of the battery cell module provided by the present invention, a voltage output device is further provided on one side of the battery cell module, the voltage output device being used to connect with an adjacent battery cell module or to output voltage.

[0013] The present invention also provides a battery pack, including the sampling structure of the aforementioned cell module.

[0014] The present invention provides a sampling structure and battery pack for a cell module. By directly connecting the voltage acquisition board to the connection bar, the use of acquisition wire harness can be significantly reduced. Furthermore, by connecting the flexible circuit board to the connection boss, the connection of traditional nickel sheets can be avoided, reducing space occupation and manufacturing costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the battery cell module provided by the present invention.

[0017] Figure 2 This is an exploded structural diagram of the battery cell module provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the connection bar structure in the battery cell module provided by the present invention.

[0019] Figure 4 This is a schematic diagram of the voltage acquisition board in the battery cell module provided by the present invention.

[0020] Figure 5 This is a schematic diagram of the connection between the voltage acquisition board and the connecting boss in the battery cell module provided by the present invention.

[0021] Figure label: 10. Battery cell module; 20. Connecting bar; 21. Insulating support strip; 22. Connecting boss; 23. Positioning hole; 24. Expansion absorption groove; 30. Voltage acquisition board; 31. Device layer; 32. Insulating film; 321. Connecting hole; 40. Voltage output component. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of the present invention and simplifying the description, 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 the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0025] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] In related technologies, the voltage acquisition board uses a rigid PCB board, which achieves closed-loop connection of the sampling circuit through a large number of wire harnesses (each single cell requires wire harnesses to form a separate sampling circuit). This method requires extensive wiring work, making it difficult to achieve effective layout in the already tight internal space of the battery. In addition, the large number of wire harnesses increases the difficulty of connection and increases the overall manufacturing cost of the battery.

[0028] To address the issues in the relevant technologies, the following will be discussed in conjunction with... Figures 1 to 5 This invention describes a sampling structure for a battery cell module, including a connecting strip 20 and a flexible voltage acquisition board 30. The connecting strip 20 is fixedly disposed on one side of the battery cell module 10 and electrically connected to the terminal post of the battery cell module 10 on the same side. The connecting strip 20 has at least one connecting boss 22 protruding outward. The voltage acquisition board 30 is electrically connected to the connecting boss 22, and along the length direction of the battery cell module 10, the plate body of the voltage acquisition board 30 and the plate body of the connecting strip 20 are spaced apart to form a physically separated gap. When the battery cell module 10 performs voltage sampling, the voltage acquisition board 30 is electrically connected to the terminal post of the battery cell, thereby enabling voltage sampling of each battery cell. In this embodiment, the voltage acquisition board 30 is directly connected to the connecting strip 20, which significantly reduces the use of acquisition wire harnesses. Furthermore, the flexible circuit board avoids the problem of traditional nickel sheet connections occupying too much space, achieving a smaller space occupation and reducing manufacturing costs. Furthermore, the gap formed by the spaced arrangement provides a certain amount of safe displacement, improving the protection of the voltage acquisition board 30.

[0029] Specifically, the connecting strip 20 is a block-shaped rigid conductive metal sheet, which can be made of materials such as aluminum, copper, or nickel. When connecting the connecting strip 20, it is fixed to one end (i.e., the end side) of the battery cell module 10 by means of laser welding, ultrasonic welding, or bolt connection. On the plate of the connecting strip 20, at least one connecting boss 22 protruding outwards (i.e., away from the battery cell module 10) is formed by means of stamping, riveting, or welding. This connecting boss 22 can be a continuous strip-shaped protrusion or multiple independently distributed protrusions. Its shape is preferably cylindrical, square-column, or arched with a flat top surface to facilitate subsequent connection. In this embodiment, a square-column protrusion structure for the connecting boss 22 is used as an example for explanation.

[0030] The voltage acquisition board 30 is a flexible printed circuit board, such as an FPC made of polyimide. It has printed wires and pads, and integrates electronic components such as voltage sampling circuits and connector interfaces. The voltage acquisition board 30 has pads corresponding one-to-one with the positions of the connecting bosses 22.

[0031] Furthermore, the battery cell module 10 is a blade battery cell module, and the above-mentioned sampling structure is provided on both of its opposite sides (the side with the positive terminal and the side with the negative terminal).

[0032] During assembly, the pads on the voltage acquisition board 30 are aligned and attached to the connecting boss 22, and then a fixed electrical connection is achieved between the two through processes such as electromagnetic pulse welding, laser welding, or resistance welding. Thus, the voltage signals of each cell in the cell module 10 are collected through the connecting bar 20 and reliably transmitted to the sampling circuit on the voltage acquisition board 30 via the connecting boss 22.

[0033] Furthermore, the connecting boss 22 itself has a certain protrusion height. After it is connected to the voltage acquisition board 30, it can make the plate body of the voltage acquisition board 30 and the plate body of the connecting bar 20 have a preset distance. This distance can improve the electrical safety of the voltage acquisition board 30.

[0034] It is understandable that the battery cell module 10 generates heat during charging, discharging, and operation, causing thermal expansion of the battery cell and the rigidly connected connector 20. Due to the flexibility of the voltage acquisition board 30 (FPC) and its potentially independent fixing points, its coefficient of thermal expansion and deformation behavior differ from that of the rigid connector 20. The gap in this embodiment provides both with a degree of freedom to move relative to each other, effectively absorbing the thermal stress caused by different materials and constraints, and preventing solder joint cracking, PCB warping, or component damage due to restricted thermal expansion.

[0035] In some embodiments, the connecting strip 20 is further provided with an insulating support strip 21, which contacts the voltage acquisition board 30. The connecting strip 20 is connected to the battery cell module 10, and the voltage acquisition board 30 is disposed on the connecting strip 20 and supported by the connecting strip 20. In this embodiment, the insulating support strip 21 can effectively maintain the gap between the voltage acquisition board 30 and the connecting strip 20, and can provide support for the voltage acquisition board 30, so as to make the voltage acquisition board 30 more stable.

[0036] Specifically, the insulating support strip 21 can be made of engineering plastics (such as PA66, PPA), insulating resin, or ceramic. The insulating support strip 21 is fixed to the plate of the connecting strip 20 by means of snap-fit, bonding, or integral injection molding, and is located on the surface of the connecting strip 20 so that it can contact the voltage acquisition board 30 when connected.

[0037] The insulating support strip 21 can be single-sided adhesive, in which case it is bonded to the connecting strip 20 through the adhesive side to achieve a fixed connection. Alternatively, the insulating support strip 21 can be double-sided adhesive, in which case one side is connected to the connecting strip 20 and the other side is connected to the contact surface of the voltage acquisition board 30, thereby providing support for the voltage acquisition board 30.

[0038] It is understandable that the battery module will be subjected to certain external vibrations or other forces during actual use. In this embodiment, the contact or connection between the voltage acquisition board 30 and the insulating support strip 21 can improve the stability of the voltage acquisition board 30 and effectively maintain the gap between the voltage acquisition board 30 and the connecting strip 20.

[0039] In conjunction with the above embodiments, such as Figure 2 , Figure 4 As shown, along the length of the voltage acquisition board 30, the length of the insulating support strip 21 is the same as the length of the voltage acquisition board 30; the thickness of the insulating support strip 21 is the same as the thickness of the protrusion of the connecting boss 22. The insulating support strip 21 is connected to the connecting row 20, and the voltage sampling board is connected to the connecting row 20 through the connecting boss 22. In this embodiment, the length of the insulating support strip 21 is the same as the length of the voltage acquisition board 30, which can improve the stability of the connection of the voltage acquisition board 30.

[0040] Specifically, along the length of the connecting strip 20, the length of the insulating support strip 21 is designed to be approximately the same as the length of the voltage acquisition board 30 in that direction. Preferably, the two lengths are substantially equal. This design means that the insulating support strip 21 can provide continuous and uniform bottom support for the voltage acquisition board 30 along its entire length.

[0041] Understandably, flexible printed circuit boards (FPCs) are prone to overall bending or wavy deformation along their length due to their own weight or external disturbances. The fully-supported insulating support strip 21 increases the contact area with the voltage acquisition board 30, completely eliminating the possibility of overall bending of the voltage acquisition board 30 along its length and ensuring that it is always in a flat and stable ideal state.

[0042] In some embodiments, the gap between the voltage acquisition board 30 and the connecting bar 20 is L, and L ≥ 2 mm. By limiting the gap, the voltage safety performance of the voltage acquisition board 30 can be improved.

[0043] Specifically, for common automotive or energy storage battery cell modules 10, the temperature difference cycling range of a single cell may exceed 50°C, and the overall thermal expansion of the module in the length direction may reach 1-1.5mm or even greater. In this embodiment, a gap of L≥2mm is set, which means that at least 0.5mm of safety margin is provided for thermal expansion under worst-case conditions. This ensures that even under extreme high and low temperature shocks, there will never be hard contact, compression, or stress accumulation between the voltage acquisition board 30 and the connecting busbar 20 due to expansion impact, fundamentally eliminating the hidden danger of structural damage caused by thermal expansion.

[0044] Furthermore, when the high-voltage circuit experiences sudden large currents, such as short-circuit currents or peak surge currents, a strong magnetic field is generated on the BMS voltage acquisition flexible board. This surge voltage in the BMS voltage acquisition flexible board circuit can burn out the chip, thereby damaging the BMS voltage acquisition flexible board. This gap is greater than 2mm to reduce electromagnetic interference from the high-voltage circuit to the BMS voltage acquisition flexible board.

[0045] In conjunction with the above embodiments, such as Figure 2 As shown, insulating support strips 21 are provided on both sides of the connecting boss 22 in the height direction of the battery cell module 10. The insulating support strips 21 include supporting foam. The provision of insulating support strips 21 on both sides can further improve the structural stability of the voltage acquisition board 30.

[0046] Specifically, the insulating support strip 21 is divided into a first insulating support strip 21 and a second insulating support strip 21, which are respectively arranged adjacent to and parallel to the two sides of the connecting boss 22 in the height direction of the cell module 10. More preferably, the first insulating support strip 21 and the second insulating support strip 21 can be a continuous long strip structure that runs through the corresponding sides of all connecting bosses 22, thereby providing two continuous and parallel full-length support strips for the voltage acquisition board 30.

[0047] Furthermore, both the first insulating support strip 21 and / or the second insulating support strip 21 are support foams. Here, "support foam" is an elastic polymer foam material with a microporous structure, preferably silicone foam, polyurethane foam, or rubber foam. This material possesses moderate elasticity, excellent compression resilience, and certain damping characteristics.

[0048] Understandably, traditional single-point or unilateral rigid supports primarily constrain in-plane displacement. However, the double-sided foam supports sandwiching the connecting boss 22 in the middle form a "sandwich-damping" structure. When the voltage acquisition board 30 vibrates in any direction, the elastic foam on both sides can effectively absorb and dissipate vibration energy through its own compression and shear deformation, providing all-around damping and vibration reduction. This is particularly beneficial for suppressing high-frequency and random vibrations, protecting the delicate sampling circuitry and solder joints.

[0049] In some embodiments, such as Figure 3 As shown, the connecting strip 20 is provided with positioning holes 23, which are integrally formed with the connecting boss 22. This integral forming reduces the manufacturing difficulty and cost of the connecting strip 20.

[0050] Specifically, the connecting strip 20 is formed with positioning holes 23 and connecting bosses 22 through an integral stamping process. The positioning holes 23 facilitate the fixed connection of the connecting strip 20.

[0051] Specifically, the connecting strip 20 is fixedly connected to the battery cell. In this embodiment, the positioning hole 23 can cooperate with external tooling for positioning, thereby enabling the rapid and accurate installation of the connecting strip 20.

[0052] It is understandable that using one-piece stamping can facilitate the processing of positioning holes 23 and connecting bosses 22, reducing processing difficulty and manufacturing cost.

[0053] In some embodiments, such as Figure 3 As shown, an expansion absorption groove 24 is integrally formed in the middle of the connecting bar 20. During the charging and discharging process, the battery module generates a large amount of heat, which causes the connecting bar 20 to expand. In this embodiment, the expansion absorption groove 24 is used to absorb the expansion and improve the stability of the structure.

[0054] Specifically, at least one expansion absorption groove 24 is formed in the middle region of the connecting row 20 by stamping. The expansion absorption groove 24 is one or more elongated groove-shaped structures.

[0055] Understandably, the connecting strip 20, as a rigid metal component, has a fixed coefficient of thermal expansion. When the battery module 10 expands due to heat, the connecting strip 20 is forced to stretch accordingly, generating significant internal tensile stress. The expansion absorption groove 24 creates a structural weakening zone in the "golden stress zone" of the connecting strip 20, providing a pre-defined and controllable release channel for this expansion deformation. When stress accumulates, the connecting strip 20 preferentially undergoes slight, elastic bending or torsional deformation at the groove opening, thus actively absorbing most of the linear expansion like a spring, rather than rigidly transferring all the expansion stress to the connection points at both ends.

[0056] In some embodiments, such as Figure 4 ,like Figure 5 As shown, the voltage acquisition board 30 includes a device layer 31 and an insulating film 32 layer connected to the opposite surface of the device layer 31. The insulating film 32 layer has connection holes 321, which are correspondingly arranged with each connection boss 22. The voltage acquisition board 30 needs to be electrically connected to the connection bus 20 to achieve circuit conduction with the terminals on the battery cell module 10. In this example, the connection holes 321 expose the conductive connection points on the device layer 31, facilitating connection to the connection bus 20.

[0057] Specifically, device layer 31, as the core functional layer, consists of a flexible substrate (such as a polyimide film) and copper foil circuitry covering it, with the required electrical traces formed by etching. The voltage sampling circuit, connector pads, and potentially integrated temperature acquisition elements, protection components, etc., are all arranged or integrated into this layer. The insulating film layer 32 is made of insulating material, preferably a polyimide cover film, a solder resist ink layer, or an additional PET / PI insulating film. This insulating film layer 32 is tightly bonded (laminated) to the surface of device layer 31 opposite to the mounting surface of the electronic components, i.e., the lower surface of the voltage acquisition board 30 or the surface facing the connection bar 20, through a hot-pressing or coating process.

[0058] Furthermore, the number of connecting through holes corresponds one-to-one with the connecting bosses 22, so that electrical connections can only occur through these specific windows, achieving reliable electrical connections while maximizing the insulation protection area and ensuring a high level of safety.

[0059] In specific configuration, the size of the connecting hole 321 is slightly larger than the top size of the connecting boss 22, but smaller than its base. During assembly, the inner wall of the connecting hole 321 serves as an initial guide and precise positioning mechanism, helping operators or automated equipment to quickly align the voltage acquisition board 30 and "fit" it into the connecting boss 22. This greatly simplifies the assembly process and improves production efficiency and alignment accuracy.

[0060] In some embodiments, a voltage output device 40 is also provided on one side of the cell module 10. The voltage output device 40 is used to connect with adjacent cell modules 10 or to output voltage. There are usually multiple cell modules 10 in the battery pack. In this example, the voltage output device 40 can facilitate the series connection of multiple modules and the connection with external loads.

[0061] Specifically, when multiple cell modules 10 need to be connected in series or parallel to form a larger battery pack, the voltage output component 40 is specifically a module connection copper busbar or a male / female terminal of a high-voltage connector. It is used to establish a robust electrical and mechanical connection with the corresponding voltage output component 40 on another adjacent cell module 10, thereby enabling energy convergence between module levels. For independently operating modules or terminal modules of a battery pack, the voltage output component 40 is specifically a total positive or negative output terminal or a high-voltage output interface. It is used to output the output voltage and current of the entire module to the main circuit of the battery management system (BMS), a load, or a charging device.

[0062] The present invention also provides a battery pack including the sampling structure of the aforementioned cell module 10. The battery pack has multiple sets of cell modules 10, and each cell module 10 has the aforementioned sampling structure.

[0063] The battery pack provided in this embodiment has the sampling structure of the cell module 10 of any of the aforementioned embodiments. Therefore, the battery pack in this embodiment has the characteristic effects of each of the aforementioned cell module 10 sampling structures. To avoid redundancy in the effect description, it will not be repeated here.

[0064] Through the above description of the embodiments, those skilled in the art can clearly understand that by directly connecting the voltage acquisition board 30 to the connection bar 20, the use of acquisition wire harness can be significantly reduced. Furthermore, by connecting the flexible circuit board to the connection boss 22, the connection of traditional nickel sheets can be avoided, reducing space occupation and manufacturing costs.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sampling structure for a battery cell module, characterized in that, include: Connecting the busbar and the flexible voltage acquisition board; The connecting bar is fixedly disposed on one side of the battery cell module and electrically connected to the terminal post of the battery cell module on the same side. The connecting bar is provided with at least one connecting boss protruding outward. The voltage acquisition board is electrically connected to the connecting boss, and along the length direction of the battery cell module, the plate body of the voltage acquisition board and the plate body of the connecting row are spaced apart to form a physically separated gap.

2. The sampling structure of the battery cell module according to claim 1, characterized in that, The connecting bar is also provided with an insulating support strip, which is in contact with the voltage acquisition board.

3. The sampling structure of the battery cell module according to claim 2, characterized in that, Along the length of the voltage acquisition board, the length of the insulating support strip is the same as the length of the voltage acquisition board; The thickness of the insulating support strip is the same as the thickness of the protrusion of the connecting boss.

4. The sampling structure of the cell module according to claim 2, characterized in that, In the height direction of the battery cell module, the insulating support strip is provided on both sides of the connecting boss, and the insulating support strip includes supporting foam.

5. The sampling structure of the cell module according to claim 1, characterized in that, The connecting bar is provided with positioning holes, which are integrally formed with the connecting bar.

6. The sampling structure of the cell module according to claim 5, characterized in that, An expansion absorption groove is integrally formed in the middle of the connecting strip.

7. The sampling structure of the battery cell module according to claim 1, characterized in that, Along the length of the battery cell module, the gap between the voltage acquisition board and the connecting bar is L, and L≥2mm.

8. The sampling structure of the cell module according to claim 7, characterized in that, The voltage acquisition board includes a device layer and an insulating film layer connected to the opposite surface of the device layer. The insulating film layer has connection holes, and the connection holes are corresponding to each of the connection bosses.

9. The sampling structure of the battery cell module according to claim 1, characterized in that, One side of the battery cell module is also provided with a voltage output device, which is used to connect to the adjacent battery cell module or to output voltage.

10. A battery pack, characterized in that, The sampling structure of the cell module as described in any one of claims 1-9.

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