Battery module and battery pack having the same

Abstract

The utility model provides a kind of battery module and the battery pack with it, wherein, battery module includes: battery group, including the multiple batteries of same direction stacking arrangement, along the arrangement direction of battery, battery group is divided into first part and second part;Connector is set in the end of battery group;First sampling structure is connected with the battery in first part, and first sampling structure has the first connecting part connected with connector;Second sampling structure is connected with the battery in second part, and second sampling structure has the second connecting part connected with connector, wherein, second connecting part and first connecting part are spaced apart in the arrangement direction perpendicular to battery;Bonding structure is set between first sampling structure and second sampling structure.The technical scheme of the application effectively solves the problem that FPC is easily torn in related technology.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery module and a battery pack having the same. Background Technology

[0002] After multiple battery cells are stacked to form a battery pack, a flexible circuit board (FPC) is placed on the side of the battery cell with the terminal post. The FPC can sample and monitor information such as battery voltage and temperature.

[0003] In related technologies, battery modules include multiple battery packs. One FPC connects two adjacent battery packs at the same time. As the number of batteries increases, the length of the FPC also needs to increase. Since the connector is separate from the battery pack, the connector can easily pull the FPC. The deformation of the end of the FPC near the connector is small, which can easily lead to the FPC being torn. Utility Model Content

[0004] The main objective of this invention is to provide a battery module and a battery pack having the same, in order to solve the problem that FPCs in related technologies are easily torn.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery module is provided, comprising: a battery pack including a plurality of batteries stacked in the same direction, the battery pack being divided into a first part and a second part along the battery arrangement direction; a connector disposed at an end of the battery pack; a first sampling structure connected to all batteries in the first part, the first sampling structure having a first connecting portion connected to the connector; a second sampling structure connected to all batteries in the second part, the second sampling structure having a second connecting portion connected to the connector, wherein the second connecting portion and the first connecting portion are spaced apart in a direction perpendicular to the battery arrangement direction; and an adhesive structure disposed between the first sampling structure and the second sampling structure.

[0006] According to another aspect of the present invention, a battery pack is provided, including a housing and a battery module disposed within the housing, wherein the battery module is the battery module described above.

[0007] Applying the technical solution of this utility model, the battery pack includes multiple batteries stacked in the same direction. Along the battery arrangement direction, the battery pack is divided into a first part and a second part. Connectors are disposed at the ends of the battery pack. A first sampling structure is connected to all batteries in the first part, and a second sampling structure is connected to all batteries in the second part. The first sampling structure has a first connecting portion, and the second sampling structure has a second connecting portion. The first connecting portion and the second connecting portion are spaced apart in a direction perpendicular to the battery arrangement direction. An adhesive structure is disposed between the first sampling structure and the second sampling structure. Through the above arrangement, the first sampling structure and the second sampling structure can respectively collect data from the batteries in the first part and the second part, thereby realizing the monitoring of the battery pack. The first sampling structure and the second sampling structure are connected by an adhesive structure, which allows the first sampling structure and the second sampling structure to form an integral unit, thereby improving the overall structural strength. Furthermore, because the first connecting portion and the second connecting portion are spaced apart, the length of the first connecting portion and the second connecting portion is relatively large, thus allowing for a certain amount of deformation, thereby preventing the first sampling structure or the second sampling structure from being torn. Furthermore, since the first and second sampling structures share the load, this further prevents either the first or second sampling structure from tearing. Therefore, the technical solution of this application effectively solves the problem of FPCs being easily torn in related technologies. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0009] Figure 1 A perspective structural schematic diagram of an embodiment of the battery module according to the present invention is shown;

[0010] Figure 2 It shows Figure 1 A top view of the battery module;

[0011] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the battery module from another perspective;

[0012] Figure 4 It shows Figure 3 A magnified view of part A of the battery module;

[0013] Figure 5 It shows Figure 1 A schematic diagram of the exploded structure of the battery module;

[0014] Figure 6 It shows Figure 1A schematic diagram of the exploded structure of the first and second sampling structures of the battery module;

[0015] Figure 7 It shows Figure 6 A three-dimensional structural diagram of the first sampling structure;

[0016] Figure 8 It shows Figure 7 A magnified view of point B in the first sampling structure.

[0017] The above figures include the following reference numerals:

[0018] 10. Battery pack; 10A. First part; 10B. Second part; 11. Battery; 20. Connector; 30. First sampling structure; 31. First connecting part; 311. Inclined section; 312. Connecting section; 3121. First connecting body; 3122. Second connecting body; 32. First body; 33. Partition; 40. Second sampling structure; 41. Second connecting part; 42. Second body. Detailed Implementation

[0019] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] like Figures 1 to 3 as well as Figure 5 and Figure 6 As shown, in this embodiment, the battery module includes: a first sampling structure 30, a second sampling structure 40, a first connecting portion 31, a battery pack 10, a connector 20, the first sampling structure 30, the second sampling structure 40, and an adhesive structure. The battery pack 10 includes a plurality of batteries 11 stacked in the same direction. Along the arrangement direction of the batteries 11, the battery pack 10 is divided into a first part 10A and a second part 10B. The connector 20 is disposed at the end of the battery pack 10. The first sampling structure 30 is connected to all batteries 11 in the first part 10A, and the first sampling structure 30 has a first connecting portion 31 that connects to the connector 20. The second sampling structure 40 is connected to the battery 11 in the second part 10B. The second sampling structure 40 has a second connecting portion 41 that connects to the connector 20. The second connecting portion 41 and the first connecting portion 31 are spaced apart in a direction perpendicular to the arrangement of the batteries 11. An adhesive structure is provided between the first sampling structure 30 and the second sampling structure 40.

[0023] Applying the technical solution of this embodiment, the battery pack 10 includes multiple batteries 11 stacked in the same direction. Along the arrangement direction of the batteries 11, the battery pack 10 is divided into a first part 10A and a second part 10B. A connector 20 is disposed at the end of the battery pack 10. A first sampling structure 30 is connected to all batteries 11 in the first part 10A, and a second sampling structure 40 is connected to all batteries 11 in the second part 10B. The first sampling structure 30 has a first connecting portion 31, and the second sampling structure 40 has a second connecting portion 41. The first connecting portion 31 and the second connecting portion 41 are spaced apart in a direction perpendicular to the arrangement direction of the batteries 11. An adhesive structure is disposed between the first sampling structure 30 and the second sampling structure 40. Through the above configuration, the first sampling structure 30 and the second sampling structure 40 can respectively collect data from the batteries 11 in the first part 10A and the second part 10B, thereby enabling monitoring of the battery pack 10. The first sampling structure 30 and the second sampling structure 40 are connected by an adhesive structure, which makes the first sampling structure 30 and the second sampling structure 40 an integral unit, thereby improving the overall structural strength. Furthermore, because the first connecting portion 31 and the second connecting portion 41 are spaced apart, their lengths are relatively large, allowing for a certain amount of deformation, thus preventing the first sampling structure 30 or the second sampling structure 40 from tearing. Simultaneously, since the first sampling structure 30 and the second sampling structure 40 share the load, tearing is further prevented. Therefore, the technical solution of this embodiment effectively solves the problem of FPC being easily torn in related technologies.

[0024] In other embodiments, the battery module may also include a third sampling structure, a fourth sampling structure, a fifth sampling structure, or more.

[0025] For example, when the battery module includes a first sampling structure 30, a second sampling structure 40, and a third sampling structure, the first sampling structure 30 has the longest length and the third sampling structure has the shortest length. In this case, the first sampling structure 30, the second sampling structure 40, and the third sampling structure are arranged sequentially from the direction closest to the battery pack 10 to the direction furthest from the battery pack 10, or the first sampling structure 30, the third sampling structure, and the second sampling structure 40 are arranged sequentially, or the second sampling structure 40, the first sampling structure 30, and the third sampling structure are arranged sequentially, or the third sampling structure, the first sampling structure 30, and the second sampling structure 40 are arranged sequentially, or the third sampling structure, the second sampling structure 40, and the first sampling structure 30 are arranged sequentially.

[0026] When the battery module includes more sampling structures, the same arrangement can be made according to the above.

[0027] like Figures 1 to 3 as well as Figure 5 and Figure 6 As shown, in this embodiment, the length of the first sampling structure 30 is greater than the length of the second sampling structure 40. The connection between the first sampling structure 30 and the battery 11 in the first part 10A is located on the portion of the first sampling structure 30 that protrudes from the second sampling structure 40. The first sampling structure 30 is provided with multiple first pins, and the second sampling structure 40 is provided with multiple second pins. The multiple first pins and multiple second pins do not overlap, which makes the overall structural layout more reasonable.

[0028] like Figures 1 to 3 as well as Figure 5 and Figure 6 As shown, in this embodiment, the first sampling structure 30 is located between the second sampling structure 40 and the battery pack 10. The length of the first sampling structure 30 is greater than the length of the second sampling structure 40, and the first sampling structure 30 can support the second sampling structure 40, thereby making the positions of the first sampling structure 30 and the second sampling structure 40 more stable.

[0029] like Figures 1 to 3 as well as Figure 5 and Figure 6 As shown, in this embodiment, the ratio of the length of the first sampling structure 30 to the length of the second sampling structure 40 is between 0.2 and 0.7. This ratio can prevent tearing of the first sampling structure 30 or the second sampling structure 40, and can also optimize the current path.

[0030] Specifically, in this embodiment, the ratio of the length of the first sampling structure 30 to the length of the second sampling structure 40 is 0.5.

[0031] Of course, in embodiments not shown in the figure, the ratio of the length of the first sampling structure 30 to the length of the second sampling structure 40 can also be 0.25, 0.3, 0.35, 0.4, 0.45, 0.55, 0.6, 0.65 or other ratios.

[0032] like Figures 1 to 3 as well as Figure 5 and Figure 6 As shown, in this embodiment, the adhesive structure includes multiple adhesive portions, which are spaced apart. This arrangement enhances the connection stability between the first sampling structure 30 and the second sampling structure 40 by dispersing the adhesive force, while allowing a certain degree of relative displacement to adapt to temperature changes and mechanical vibrations during battery module use.

[0033] Of course, the above-mentioned adhesive structure can be a straight strip adhesive part, a bent strip adhesive part, or other shapes.

[0034] Specifically, in this embodiment, the adhesive structure is double-sided adhesive. Of course, the adhesive structure can also be structural adhesive or other types of adhesive.

[0035] like Figures 4 to 8 As shown, in this embodiment, the first sampling structure 30 includes a first main body 32, and a first connecting portion 31 is bent relative to the first main body 32. The second sampling structure 40 includes a second main body 42, and a second connecting portion 41 is bent relative to the second main body 42. This arrangement allows both the first connecting portion 31 and the second connecting portion 41 to have a certain deformation space, which further prevents tearing.

[0036] like Figures 4 to 8 As shown, in this embodiment, the first connecting portion 31 includes an inclined section 311 and a connecting section 312, with the inclined section 311 located between the connecting section 312 and the first body 32. The inclined section 311 further reduces stress during the connection process by changing the connection path.

[0037] Specifically, the structure of the second connecting part 41 is the same as that of the first connecting part 31.

[0038] like Figures 4 to 8 As shown, in this embodiment, the connecting segment 312 includes a first connecting body 3121 and a second connecting body 3122 that are interconnected, and the first connecting body 3121 and the second connecting body 3122 are stacked. This arrangement can disperse the wire harness, thereby better realizing signal transmission.

[0039] like Figures 4 to 8As shown, in this embodiment, the first sampling structure 30 further includes a partition 33, which is located between the first connecting body 3121 and the second connecting body 3122. The partition 33 can achieve physical isolation, thereby reducing electromagnetic interference between different lines.

[0040] Specifically, the aforementioned partition 33 is made of foam.

[0041] In other embodiments, the length of the first sampling structure 30 and the length of the second sampling structure 40 are the same. This arrangement improves the tear resistance.

[0042] According to another aspect of this application, a battery pack is provided. The battery pack of this embodiment includes a housing and a battery module disposed within the housing, the battery module being the aforementioned battery module. The aforementioned battery module employs a first sampling structure 30 and a second sampling structure 40 that are adhesively attached, thereby preventing tearing of the first sampling structure 30 or the second sampling structure 40, thus making the use of the battery module safer and improving its quality. Therefore, the battery pack having the aforementioned battery module also possesses the aforementioned advantages.

[0043] The following description is provided to enable those skilled in the art to fully understand this application and is not intended to limit the subject matter of the claims.

[0044] [Battery]

[0045] The battery in this application is a secondary battery, also known as a rechargeable battery or storage battery, which refers to a battery that can be used again after being discharged by recharging to activate the active materials.

[0046] Typically, a secondary battery consists of a battery cell, an electrolyte, and a casing. The battery cell includes a positive electrode, a negative electrode, and a separator. The battery cell and electrolyte are assembled inside the casing. During charging and discharging, active ions (such as lithium ions) move back and forth between the positive and negative electrodes, inserting and releasing. The separator, located between the positive and negative electrodes, primarily prevents short circuits while allowing active ions to pass through. The electrolyte, situated between the positive and negative electrodes, mainly serves to conduct active ions.

[0047] As an example, the preparation process of a secondary battery is as follows: the positive electrode, separator, and negative electrode are stacked in sequence, with the separator acting as a separator between the positive and negative electrodes. Then, the electrodes are wound or stacked to obtain a cell. The cell is placed in a casing, dried, and then injected with electrolyte. After vacuum sealing, settling, formation, and shaping, a secondary battery is obtained.

[0048] [Positive electrode tablets]

[0049] A positive electrode typically includes a positive current collector and a positive electrode film layer disposed on at least one side of the positive current collector. The positive electrode film layer includes a positive electrode active material, which can be any existing publicly disclosed positive electrode active material or a positive electrode active material optimized based on existing materials.

[0050] This application does not impose any particular restrictions on the type of positive electrode active material for the positive electrode sheet. As an example, the positive electrode active materials in this application include lithium-containing transition metal oxides (e.g., LiCoO2), phosphides (e.g., LiFePO4), or lithium intercalation compounds (e.g., positive electrode materials for binary lithium batteries such as lithium cobalt oxide and lithium nickel oxide, or positive electrode materials for ternary lithium batteries such as lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminum oxide).

[0051] In some embodiments, the positive electrode sheet can be prepared by dispersing the above-mentioned components for preparing the positive electrode sheet, such as positive electrode active material, conductive agent, binder and any other components, in a solvent (e.g., N-methylpyrrolidone) to form a positive electrode slurry; coating the positive electrode slurry onto the positive electrode current collector, and then obtaining the positive electrode sheet after drying, rolling, cutting and other processes.

[0052] In this application, the binder is used to improve the adhesion between positive electrode active material particles and the adhesion between the positive electrode active material and the current collector. This application does not impose any particular limitation on the type of binder for the positive electrode sheet; the binder can be any conventional choice in the battery industry. Specifically, the binder can be at least one of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), polyvinyl alcohol (PVA), styrene-butadiene rubber (SBR), polyacrylonitrile (PAN), polyimide (PI), polyacrylic acid (PAA), polyacrylate, polyolefin, sodium carboxymethyl cellulose (CMC), or sodium alginate.

[0053] This application does not impose any particular restrictions on the positive electrode current collector, as long as it is conductive and will not cause adverse chemical changes in the battery, and can be made of, for example: stainless steel, aluminum, nickel, titanium, sintered carbon; or aluminum or stainless steel that has been surface treated with one of carbon, nickel, titanium, silver, etc.

[0054] [Negative electrode plate]

[0055] The negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on at least one side of the negative electrode current collector. The negative electrode active material layer comprises a silicon-based material. This application does not specifically limit the type of silicon-based material; the silicon-based material can be a silicon-carbon material and / or a silicon-oxygen material. As an example, the silicon-based material can be one or more of silicon-carbon composite negative electrode materials, silicon suboxide negative electrode materials, modified silicon suboxide negative electrode materials, and nano-silicon materials. The negative electrode active material in the negative electrode active material layer may also optionally include one or more of artificial graphite, natural graphite, and hard carbon.

[0056] In some embodiments, the negative electrode sheet can be prepared by dispersing the components used to prepare the negative electrode sheet, such as the negative electrode active material, conductive agent, binder and any other components, in a solvent (e.g., water) to form a negative electrode slurry; coating the negative electrode slurry onto the negative electrode current collector, and then obtaining the negative electrode sheet after drying, rolling, cutting and other processes.

[0057] This application does not specifically limit the type of negative electrode conductive agent. In some embodiments, as an example, the negative electrode conductive agent can be one or more of conventional negative electrode conductive agents such as acetylene black and carbon nanotubes. This application does not specifically limit the type of negative electrode binder. In some embodiments, as an example, the binder can be one or more of conventional negative electrode binders such as styrene-butadiene rubber latex (SBR), polyvinylidene fluoride (PVDF), polyacrylic acid (PAA), and sodium carboxymethyl cellulose (CMC). In this application, the binder is preferably PAA, SBR, and CMC, and the mass ratio of PAA, SBR, and CMC can be (34.38-74.29):(20-59.38):(5-7.14).

[0058] This application does not impose specific limitations on the type of negative electrode current collector. In some embodiments, as an example, the negative electrode current collector can be one of the conventional negative electrode current collectors such as copper foil.

[0059] Electrolyte

[0060] The electrolyte acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. As an example, the electrolyte in this application can be any electrolyte suitable for electrochemical energy storage devices in the art. The electrolyte includes an electrolyte and a solvent; the electrolyte typically includes a lithium salt, and additives may also be added to the electrolyte.

[0061] Specifically, the lithium salt includes at least one selected from lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium perchlorate (LiClO4), lithium hexafluoroarsenate (LiAsF6), lithium bis(fluorosulfonyl)imide (LiFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium trifluoromethanesulfonate (LiTFS), lithium difluorooxalate borate (LiDFOB), lithium dioxalate borate (LiBOB), lithium difluorophosphate (LiPO2F2), lithium difluorodioxalate phosphate (LiDFOP), and lithium tetrafluorooxalate phosphate (LiTFOP). The concentration of the electrolyte in the electrolyte solution can be 0.5–5 mol / L.

[0062] Specifically, the solvent includes at least one of ethylene carbonate (EC), propylene carbonate (PC), methyl ethyl carbonate (EMC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), methyl propyl carbonate (MPC), ethyl propyl carbonate (EPC), butyl carbonate (BC), fluoroethylene carbonate (FEC), methyl formate (MF), methyl acetate (MA), ethyl acetate (EA), propyl acetate (PA), methyl propionate (MP), ethyl propionate (EP), propyl propionate (PP), methyl butyrate (MB), ethyl butyrate (EB), 1,4-butyrolactone (GBL), sulfolane (SF), dimethyl sulfone (MSM), methyl ethyl sulfone (EMS), and diethyl sulfone (ESE).

[0063] In some implementations, as an example, the additive may be a conventional electrolyte additive such as fluoroethylene carbonate (FEC), chloroethylene carbonate (CEC), or vinylene carbonate (VC).

[0064] [Septum]

[0065] In some embodiments, the secondary battery also includes a separator. This application does not impose any particular limitation on the type of separator; any known porous separator with good chemical and mechanical stability can be selected.

[0066] In some embodiments, as an example, the diaphragm can be one of PP, PE, or PP / PF; the diaphragm can also be a structure in which a coating is formed on the surface of the base film, wherein the base film coating can be one of PP, PE, or PP / PF, and the coating can be an inorganic coating and / or an organic coating. The inorganic coating can be selected from alumina ceramic layers, osmium silicate, etc., and the organic coating can be selected from PVDF, etc.

[0067] In the description of this utility model, it should be understood that "multiple" means a quantity of two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0068] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0069] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0070] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery module, characterized in that, include: The battery pack (10) includes a plurality of batteries (11) stacked in the same direction. The battery pack (10) is divided into a first part (10A) and a second part (10B) along the arrangement direction of the batteries (11). A connector (20) is disposed at the end of the battery pack (10); The first sampling structure (30) is connected to the battery (11) in the first part (10A), and the first sampling structure (30) has a first connecting part (31) connected to the connector (20); The second sampling structure (40) is connected to the battery (11) in the second part (10B). The second sampling structure (40) has a second connecting part (41) connected to the connector (20). The second connecting part (41) and the first connecting part (31) are spaced apart in a direction perpendicular to the arrangement of the battery (11). An adhesive structure is disposed between the first sampling structure (30) and the second sampling structure (40).

2. The battery module according to claim 1, characterized in that, The length of the first sampling structure (30) is greater than the length of the second sampling structure (40), and the connection between the first sampling structure (30) and the battery (11) in the first part (10A) is located on the part of the first sampling structure (30) that protrudes from the second sampling structure (40).

3. The battery module according to claim 1, characterized in that, The first sampling structure (30) is located between the second sampling structure (40) and the battery pack (10).

4. The battery module according to claim 1, characterized in that, The ratio of the length of the first sampling structure (30) to the length of the second sampling structure (40) is between 0.2 and 0.

7.

5. The battery module according to claim 1, characterized in that, The length of the first sampling structure (30) is the same as the length of the second sampling structure (40).

6. The battery module according to any one of claims 1 to 5, characterized in that, The battery module further includes a third sampling structure, wherein the third sampling structure, the second sampling structure (40), and the first sampling structure (30) are stacked together; or, the battery module further includes a third sampling structure and a fourth sampling structure, wherein the fourth sampling structure, the third sampling structure, the second sampling structure (40), and the first sampling structure (30) are stacked together.

7. The battery module according to any one of claims 1 to 5, characterized in that, The adhesive structure includes multiple adhesive portions, which are spaced apart.

8. The battery module according to any one of claims 1 to 5, characterized in that, The first sampling structure (30) includes a first body (32), the first connecting portion (31) is bent relative to the first body (32), and / or the second sampling structure (40) includes a second body (42), the second connecting portion (41) is bent relative to the second body (42).

9. The battery module according to claim 8, characterized in that, The first connecting portion (31) includes an inclined section (311) and a connecting section (312), wherein the inclined section (311) is located between the connecting section (312) and the first body (32).

10. The battery module according to claim 9, characterized in that, The connecting segment (312) includes a first connecting body (3121) and a second connecting body (3122) that are connected to each other, and the first connecting body (3121) and the second connecting body (3122) are stacked.

11. The battery module according to claim 10, characterized in that, The first sampling structure (30) further includes a partition (33) located between the first connecting body (3121) and the second connecting body (3122).

12. A battery pack, comprising a housing and a battery module disposed within the housing, characterized in that, The battery module is the battery module according to any one of claims 1 to 11.

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