Acquisition device and battery module

Abstract

The utility model belongs to the technical field of batteries, and discloses an acquisition device and a battery module, the acquisition device is used for being connected to the battery module, and the acquisition device comprises a sampling plate assembly, a plurality of first sampling terminals and a plurality of second sampling terminals; one end of the first sampling terminal and one end of the second sampling terminal are respectively connected to the sampling plate assembly, the other end of the first sampling terminal and the other end of the second sampling terminal are respectively connected to the battery module, and the sampling plate assembly, the first sampling terminal and the second sampling terminal are split parts. The processing technology of each part is relatively simple, a complex integrated forming technology is not needed, the high requirements of integrated processing on equipment and technology are reduced, the difficulty and the complexity of the manufacturing process are reduced, when a certain part is damaged, only the damaged part needs to be replaced, overall replacement like an integrated part is not needed, and the cost is reduced. And the material cost and the labor cost required by maintenance are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, especially relates to a collection device and battery module. BACKGROUND

[0002] In the field of battery module and battery pack, accurate parameter sampling is of great significance to guarantee battery performance and safety. The battery module and battery pack disclosed in the existing patent document "202323321864.7" design the sampling plate main body, the first conductive part and the second conductive part connected to the busbar of the battery module for sampling as an integral part. Although the integral design has advantages in connection stability, etc., the integral part needs to use high-precision processing technology to ensure the accurate forming and connection of each part, which greatly increases the manufacturing difficulty and cost, and once a part fails, the entire integral part often needs to be replaced, greatly increasing the maintenance cost. UTILITY MODEL CONTENTS

[0003] The main purpose of the utility model is to provide a collection device and battery module, which aims to solve the technical problem that the sampling plate main body in the existing sampling assembly and the sampling part connected with the sampling plate main body are an integral part, resulting in high cost of sampling assembly in manufacturing and maintenance, etc.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model provides a collection device for connecting on a battery module, comprising a sampling plate assembly, a plurality of first sampling terminals and a plurality of second sampling terminals;

[0005] One end of the first sampling terminal and the second sampling terminal is respectively connected to the sampling plate assembly, the other end of the first sampling terminal and the second sampling terminal is respectively connected to the battery module, and the sampling plate assembly, the first sampling terminal and the second sampling terminal are separate parts.

[0006] Further, the sampling plate assembly comprises a sampling plate main body, a plurality of notches are provided on the sampling plate main body, the first sampling terminal is connected to the sampling plate main body to form a first connection point, the second sampling terminal is connected to the sampling plate main body to form a second connection point, and the first connection point and the second connection point are oppositely arranged on both sides of the notch.

[0007] Further, a plurality of convex buffer parts are further provided on the sampling plate main body, and the buffer parts extend along the width direction of the sampling plate main body.

[0008] Further, the first sampling terminal comprises a sampling strip assembly, a first sampling sheet and a second sampling sheet, the first sampling sheet is arranged at one end of the sampling strip assembly close to the sampling plate body, the first sampling sheet corresponds to the notch, and the second sampling sheet is connected with the first sampling sheet and the sampling plate body respectively.

[0009] Further, the first sampling terminal further comprises a third sampling sheet, and the third sampling sheet is arranged at one end of the sampling strip assembly away from the sampling plate body.

[0010] Further, the sampling strip assembly comprises a sampling strip body, a first bending part and a second bending part, the first bending part is arranged at one side of the sampling strip body close to the sampling plate body and connected with the first sampling sheet, the second bending part is arranged at one side of the sampling strip body away from the sampling plate body and connected with the third sampling sheet, and first and second through holes for clamping the battery module are arranged on the first and second bending parts respectively.

[0011] Further, the sampling device further comprises a protective plate, the protective plate is arranged at one side of the sampling plate body away from the second sampling sheet, and the protective plate is arranged corresponding to the first sampling sheet and the first bending part respectively.

[0012] Further, the second sampling terminal comprises a fourth sampling sheet and a fifth sampling sheet connected on the sampling plate body, the fourth sampling sheet and the fifth sampling sheet are arranged at intervals, the fourth sampling sheet is used for collecting the electric heating parameter of the battery module, and the fifth sampling sheet is used for collecting the voltage parameter of the battery module.

[0013] Further, the fourth sampling sheet comprises a connecting part and a collecting part, the connecting part is arranged on the sampling plate body, the collecting part is connected with the connecting part through a sampling bending part, and a buckle member is arranged at one side of the connecting part away from the sampling plate body.

[0014] Further, the sampling plate assembly further comprises a plug-in piece, the plug-in piece is connected at one end of the sampling plate body, and the plug-in piece is used for being connected with an external electrical device.

[0015] The utility model further provides a battery module, comprising the collection device of any one of the above-embodiment.

[0016] Beneficial effects:

[0017] The utility model discloses a kind of acquisition devices for connecting on battery module, including sampling board assembly, multiple first sampling terminals and multiple second sampling terminals;The first sampling terminal and the one end of the second sampling terminal are respectively connected on the sampling board assembly, the other end of the first sampling terminal and the second sampling terminal is respectively connected on the battery module, and the sampling board assembly, the first sampling terminal and the second sampling terminal are split parts, so that each component processing technology is relatively simple, without complex integrated forming process, reduce the high requirement of equipment and technology due to integration processing, reduce the difficulty and complexity of manufacturing process, and when some component is damaged, only the damaged component needs to be replaced, without integral replacement like integral part, greatly reduce the material and manpower cost required for maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is acquisition device schematic view of an embodiment of the utility model;

[0019] Figure 2 It is A place local enlarged view of an embodiment of the utility model Figure 1

[0020] Figure 3 It is first sampling terminal schematic view of an embodiment of the utility model;

[0021] Figure 4 It is fourth sampling piece schematic view of an embodiment of the utility model;

[0022] Figure 5 It is battery module schematic view of an embodiment of the utility model;

[0023] Figure 6 It is B place local enlarged view of an embodiment of the utility model Figure 5

[0024] Wherein:

[0025] 100, acquisition device;200, battery module;Z, first direction;Y, second direction;X, third direction;

[0026] 1, sampling board assembly;2, first sampling terminal;3, second sampling terminal;4, protection plate;5, busbar;6, clamping column;

[0027] 10, sampling board main body;11, plug-in part;12, notch;13, buffer portion;

[0028] 20, sampling strip assembly;21, first sampling piece;22, second sampling piece;23, third sampling piece;

[0029] ​​201, sampling strip body; 202, first bending part; 203, second bending part; 204, first through hole; 205, second through hole;

[0030] 30, fourth sampling piece; 31, fifth sampling piece;

[0031] 301, connecting part; 302, collecting part; 303, sampling bending part; 304, buckle piece.

[0032] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are merely intended to explain the utility model, and are not intended to limit the utility model.

[0034] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] In the description of the utility model, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless another definite provision and limitation, first feature is in second feature " on " or " under " can include first and second features direct contact, also can include first and second features is not direct contact but is through additional feature between them contact. Moreover, first feature is in second feature " on ", " above " and " on " include first feature is in second feature right above and oblique above, or only indicate first feature horizontal height is higher than second feature. First feature is in second feature " under ", " below " and " under " include first feature is in second feature right below and oblique below, or only indicate first feature horizontal height is less than second feature.

[0037] Referring to Figure 1 , Figure 5 , the embodiment provides a collection device 100 for connecting on a battery module 200, comprising a sampling board assembly 1, a plurality of first sampling terminals 2 and a plurality of second sampling terminals 3.

[0038] One end of the first sampling terminal 2 and the second sampling terminal 3 is connected to the sampling board assembly 1 respectively, the other end of the first sampling terminal 2 and the second sampling terminal 3 is connected to the battery module 200 respectively, and the sampling board assembly 1, the first sampling terminal 2 and the second sampling terminal 3 are separate parts.

[0039] In the above embodiment, the whole structure of the collection device 100 is preferably arranged on the double-head tab battery module 200, that is, the battery module 200 is provided with electrodes (positive and negative electrodes) at both ends, comprising a sampling board assembly 1, a plurality of first sampling terminals 2 and a plurality of second sampling terminals 3, wherein the sampling board assembly 1 is a core part for collecting the electrical and thermal parameters collected from the two poles of the battery module 200, preferably a flexible circuit board, one end of the first sampling terminal 2 is connected to the sampling board assembly 1, and the other end is connected to the busbar 5 of one of the electrode ends (positive electrode) of the battery module 200, mainly for collecting data at this position; and one end of the second sampling terminal 3 is also connected to the sampling board assembly 1, and the other end of the second sampling terminal 3 is connected to the busbar 5 of the other electrode end (negative electrode) of the battery module 200, performing the same data collection task, wherein the first sampling terminal 2 can also be connected to the negative electrode of the battery module 200, and the second sampling terminal 3 can also be connected to the positive electrode of the battery module 200, and finally collected on the sampling board assembly 1 is transmitted to external electrical devices, the sampling board assembly 1, the first sampling terminal 2 and the second sampling terminal 3 are designed as separate parts, so that the processing technology of each part is relatively simple, without complex integrated molding process, reducing the high requirements of integrated processing on equipment and technology, reducing the difficulty and complexity of the manufacturing process, and when a part is damaged, only the damaged part needs to be replaced, without overall replacement like an integral part, greatly reducing the material and labor costs required for maintenance.

[0040] Referring to Figures 1-2 , Figure 5 In an embodiment, the sampling plate assembly 1 comprises a sampling plate body 10, a plurality of notches 12 are arranged on the sampling plate body 10, the first sampling terminal 2 is connected to the sampling plate body 10 to form a first connection point, the second sampling terminal 3 is connected to the sampling plate body 10 to form a second connection point, and the first connection point and the second connection point are oppositely arranged on both sides of the notch 12.

[0041] In the above embodiment, the sampling plate assembly 1 comprises a sampling plate body 10, which is used to collect and process data collected from the positive and negative electrodes of the battery module 200. A plurality of notches 12 are arranged on the sampling plate body 10. The shape of the notch 12 is preferably U-shaped. Its main function is to prevent the second sampling sheet 22 from damaging the sampling plate body 10 during the laser welding process of welding the first sampling sheet 21, thereby improving the safety during assembly. The notch 12 extends along the width direction of the sampling plate body 10 by a first specified distance. The first direction Z is the width direction of the sampling plate body 10. At the same time, the first sampling terminal 2 is connected to the sampling plate body 10 to form a first connection point, and the second sampling terminal 3 is connected to the sampling plate body 10 to form a second connection point. The first connection point and the second connection point are respectively located on the opposite sides of the notch 12, so that the first sampling terminal 2 and the second sampling terminal 3 can work efficiently without interfering with each other, thereby ensuring the reliability and accuracy of data transmission.

[0042] Further, a plurality of buffer portions 13 are arranged on the sampling plate body 10. The buffer portion 13 extends along the first direction Z of the sampling plate body 10 and protrudes by a second specified distance towards the second direction Y. The buffer portion 13 extends along the first direction Z of the entire sampling plate body 10. The second direction Y is the thickness direction of the sampling plate body 10. The third direction X is the length direction of the sampling plate body 10. The first direction Z, the second direction Y and the third direction X are perpendicular to each other. The buffer portion 13 is mainly used when the sampling plate body 10 is connected to the bus bar 5 of the battery module 200. The buffer portion 13 is a redundant design of the flexible circuit board of the sampling plate body 10. The length design reserves a certain space, which is used to absorb the assembly tolerance of the battery module 200 and the length change of the module caused by the swelling of the battery cell in the battery module 200, so as to protect the sampling plate body 10 from tearing and failure due to insufficient length.

[0043] Referring to Figures 1-3 , Figure 5In an embodiment, the first sampling terminal 2 comprises a sampling strip assembly 20, a first sampling sheet 21 and a second sampling sheet 22, the first sampling sheet 21 is arranged at one end of the sampling strip assembly 20 close to the sampling plate body 10, the first sampling sheet 21 corresponds to the notch 12, and the second sampling sheet 22 is connected to the first sampling sheet 21 and the sampling plate body 10 respectively.

[0044] In the above embodiment, the first sampling terminal 2 comprises a sampling strip assembly 20, a first sampling sheet 21 and a second sampling sheet 22, the sampling strip assembly 20 is a long strip-shaped flexible circuit board, the sampling strip assembly 20 is glued in the corresponding accommodating space of the battery module 200, the first sampling sheet 21 is a sampling nickel sheet installed at one end of the sampling strip assembly 20 close to the sampling plate body 10, which is directly electrically connected to the sampling plate body 10 and fixed on the sampling strip assembly 20 by welding, the first sampling sheet 21 is arranged corresponding to the notch 12, which means that the first sampling sheet 21 is located above the side edge of the notch 12, so that the first sampling sheet 21 is in a suspended state at the side edge of the notch 12, the sampling strip assembly 20 and the first sampling sheet 21 are integrally encapsulated after internal welding, the second sampling sheet 22 is connected to the first sampling sheet 21 and the sampling plate body 10 respectively, so that the sampling strip assembly 20 is connected to one side of the first sampling sheet 21, and the second sampling sheet 22 is connected to the other side of the first sampling sheet 21 perpendicularly, the sampling strip assembly 20 and the second sampling sheet 22 are respectively welded on the adjacent two sides of the first sampling sheet 21, effectively improving the stability of the connection between the first sampling terminal 2 and the sampling plate body 10.

[0045] Further, the first sampling terminal 2 further comprises a third sampling sheet 23, the third sampling sheet 23 is arranged at one end of the sampling strip assembly 20 away from the sampling plate body 10, the third sampling sheet 23 is electrically connected to the busbar 5 of the positive electrode of the battery module 200, and is used for collecting the voltage parameter at the electrode, the third sampling sheet 23 is identical to the second sampling sheet 22, and the two are symmetrically arranged with the sampling strip assembly 20 as the axis of symmetry, the third sampling sheet 23 is firmly connected to the sampling strip assembly 20 by welding, that is, the third sampling sheet 23 and the sampling strip assembly 20 are integrally encapsulated after internal welding, ensuring the stability and reliability of the electrical connection.

[0046] Referring to Figures 1-6In an embodiment, the sampling strip assembly 20 comprises a sampling strip body 201, a first bending part 202 and a second bending part 203. The first bending part 202 is arranged on the side of the sampling strip body 201 close to the sampling plate body 10 and connected with the first sampling sheet 21. The second bending part 203 is arranged on the side of the sampling strip body 201 away from the sampling plate body 10 and connected with the third sampling sheet 23. The first bending part 202 and the second bending part 203 are respectively provided with a first through hole 204 and a second through hole 205 for clamping with the battery module 200.

[0047] In the above embodiment, the sampling strip assembly 20 comprises a sampling strip body 201, a first bending part 202 and a second bending part 203. The first bending part 202 is arranged on the side of the sampling strip body 201 close to the sampling plate body 10 and connected with the first sampling sheet 21. The second bending part 203 is arranged on the side of the sampling strip body 201 away from the sampling plate body 10 and connected with the third sampling sheet 23. The first bending part 202 is connected with the first sampling sheet 21 by welding, and the second bending part 203 is connected with the third sampling sheet 23 by the same way. The first bending part 202 and the second bending part 203 are the same in structure and symmetrically arranged. The first bending part 202 and the second bending part 203 are respectively provided with a first through hole 204 and a second through hole 205 in strip shape. The battery module 200 is provided with two clamping columns 6 corresponding to the first through hole 204 and the second through hole 205. The main function of the first through hole 204 and the second through hole 205 is to pass through the clamping columns 6 on the battery module 200, so that the sampling strip assembly 20 is clamped on the battery module 200 through the clamping columns 6, and the stability of the connection between the sampling strip assembly 20 and the battery module 200 is ensured.

[0048] Further, the collecting device 100 further comprises a protective plate 4, the material of the protective plate 4 is preferably hard FR4, FR4 is a kind of glass fiber of insulating composite material bonded by resin, the protective plate 4 is arranged on the side of the sampling plate main body 10 away from the second sampling sheet 22, so that the protective plate 4 is connected with the second sampling sheet 22 on the opposite sides of the sampling plate main body 10, and the protective plate 4 is arranged corresponding to the first sampling sheet 21 and the first bending part 202 respectively, which means that the first sampling sheet 21 is in a suspended state at the side edge of the notch 12, when the first bending part 202 is connected with the first sampling sheet 21, the protective plate 4 arranged on the side of the sampling plate main body 10 away from the second sampling sheet 22 not only completely shields the first sampling sheet 21, but also shields part of the first bending part 202, so that the first sampling sheet 21 can ensure that it will not contact the busbar 5 due to any deviation, and at the same time, the protective plate 4 also ensures that part of the first bending part 202 will not unnecessarily contact the busbar 5, providing good insulation and protection performance, and preventing the first sampling sheet 21 and the second sampling sheet 22 from damaging the bottom module structure during laser welding, in addition, the protective plate 4 is made of hard material, which can improve the hardness of the sampling plate main body 10 parts, and is used for local reinforcement, thereby improving the safety of the system.

[0049] With reference to Figures 1-5 In an embodiment, the second sampling terminal 3 comprises a fourth sampling sheet 30 and a fifth sampling sheet 31 connected to the sampling plate main body 10, the fourth sampling sheet 30 and the fifth sampling sheet 31 are arranged at intervals, the fourth sampling sheet 30 is used to collect the electrical and thermal parameters of the battery module 200, and the fifth sampling sheet 31 is used to collect the voltage parameters of the battery module 200.

[0050] In the above embodiment, the second sampling terminal 3 comprises a fourth sampling sheet 30 and a fifth sampling sheet 31, both of which are connected to the sampling plate main body 10, the first sampling sheet 21, the second sampling sheet 22, the third sampling sheet 23, the fourth sampling sheet 30 and the fifth sampling sheet 31 are all nickel sheets, the fourth sampling sheet 30 is used to collect the electrical and thermal parameters of the battery module 200, and the fifth sampling sheet 31 is specially responsible for collecting the voltage parameters, the electrical and thermal parameters include temperature, voltage and other parameters, each first sampling terminal 2 corresponds to a fourth sampling sheet 30 or a fifth sampling sheet 31, the fifth sampling sheet 31 is located between adjacent fourth sampling sheets 30, and the fourth sampling sheet 30 and the fifth sampling sheet 31 are arranged at intervals, which avoids mutual interference and significantly improves the accuracy and reliability of data collection.

[0051] Further, the fourth sampling sheet 30 comprises a connecting part 301 and a collecting part 302, the connecting part 301 is welded on the sampling plate body 10, the collecting part 302 is connected with the connecting part 301 through a sampling bending part 303, the sampling bending part 303 is bent towards the second direction Y, that is, bent towards the direction of the battery module 200, the connecting part 301, the collecting part 302 and the sampling bending part 303 are an integral piece, so that the collecting part 302 can be closely attached to the busbar 5 of the battery module 200, thereby realizing accurate detection of the temperature and voltage parameters of the battery module 200, in addition, a buckle 304 is arranged on the side of the connecting part 301 away from the sampling plate body 10, the buckle 304 is preferably a U-shaped structure, the buckle 304 is internally used for mounting a temperature sensing element on an FPC (flexible circuit board), and the surrounding structure formed by the U-shaped structure can protect the internal temperature sensing element and prevent the temperature sensing element from being damaged by external force.

[0052] With reference to Figure 1 , Figure 5 In an embodiment, the sampling plate assembly 1 further comprises a plug-in part 11 connected to one end of the sampling plate body 10, and the plug-in part 11 is used for connecting with external electrical devices.

[0053] In the above embodiment, the sampling plate assembly 1 further comprises a plug-in part 11, the plug-in part 11 is used for connecting with external electrical devices, the plug-in part 11 is composed of a low-voltage socket and a low-voltage plug protection cover, the low-voltage socket is directly electrically connected to one end of the sampling plate body 10 and plays a role in transmitting data and power, and is usually designed in a standardized manner to facilitate quick docking with other external electrical devices, and a plurality of pins or contacts are arranged inside the low-voltage socket for electrical connection with the corresponding interface of the external device, and the low-voltage plug protection cover is sleeved outside the low-voltage socket to provide additional physical protection, fix the entire sampling plate assembly 1 outside the end plate of the battery module 200, and ensure efficient and reliable electrical connection between the sampling plate assembly 1 and the external device.

[0054] With reference to Figure 1 , Figure 5 The utility model also proposes a battery module 200, comprising the collection device 100 of any one embodiment, the collection device 100 is arranged on the battery module 200, can monitor the temperature and voltage and other electrothermal parameters inside it in real time and accurately, and ensures the safe operation of the battery module 200.

[0055] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent flow conversion using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A collection device for connection to a battery module, characterized in that The sampling plate assembly, the plurality of first sampling terminals and the plurality of second sampling terminals; One end of the first sampling terminal and the second sampling terminal is connected to the sampling plate assembly respectively, and the other end of the first sampling terminal and the second sampling terminal is connected to the battery module respectively, and the sampling plate assembly, the first sampling terminal and the second sampling terminal are separate parts.

2. The collection device of claim 1, wherein, The sampling plate assembly comprises a sampling plate body, and a plurality of notches are arranged on the sampling plate body; the first sampling terminal is connected to the sampling plate body to form a first connection point; the second sampling terminal is connected to the sampling plate body to form a second connection point; and the first connection point and the second connection point are arranged on opposite sides of the notches.

3. The collection device of claim 2, wherein, A plurality of raised buffer portions are further arranged on the sampling plate body and extend along the width direction of the sampling plate body.

4. The collection device of claim 2, wherein, The first sampling terminal comprises a sampling strip assembly, a first sampling sheet and a second sampling sheet; the first sampling sheet is arranged at one end of the sampling strip assembly close to the sampling plate body, and the first sampling sheet corresponds to the notch; and the second sampling sheet is connected to the first sampling sheet and the sampling plate body respectively.

5. The collection device of claim 4, wherein, The first sampling terminal further comprises a third sampling sheet arranged at one end of the sampling strip assembly away from the sampling plate body.

6. The collection device of claim 5, wherein, The sampling strip assembly comprises a sampling strip body, a first bending portion and a second bending portion; the first bending portion is arranged at one side of the sampling strip body close to the sampling plate body and connected to the first sampling sheet; the second bending portion is arranged at one side of the sampling strip body away from the sampling plate body and connected to the third sampling sheet; and the first bending portion and the second bending portion are respectively provided with a first through hole and a second through hole for clamping the battery module.

7. The collection device of claim 6, wherein, The collecting device further comprises a protective plate arranged at one side of the sampling plate body away from the second sampling sheet, and the protective plate is arranged corresponding to the first sampling sheet and the first bending portion respectively.

8. The collection device of claim 2, wherein, The second sampling terminal comprises a fourth sampling sheet and a fifth sampling sheet connected to the sampling plate body; the fourth sampling sheet and the fifth sampling sheet are arranged at intervals; the fourth sampling sheet is used for collecting the electric heating parameter of the battery module; and the fifth sampling sheet is used for collecting the voltage parameter of the battery module.

9. The collection device of claim 8, wherein, The fourth sampling sheet comprises a connecting portion and a collecting portion; the connecting portion is arranged on the sampling plate body; the collecting portion is connected to the connecting portion through a sampling bending portion; and a buckle member is arranged at one side of the connecting portion away from the sampling plate body.

10. The collection device of claim 2, wherein, The sampling plate assembly further comprises a plug-in member connected to one end of the sampling plate body, and the plug-in member is used for connecting to an external electrical device.

11. A battery module, characterized by The collecting device comprises the sampling plate assembly, the plurality of first sampling terminals and the plurality of second sampling terminals according to any one of claims 1-10.

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