CN219457946U - Integrated sampling assembly for battery and battery module - Google Patents

Abstract

The utility model provides an integrated sampling assembly for a battery and a battery module. The integrated sampling assembly for a battery includes: an insulating housing, a circuit board, and a conductive sheet. The insulating shell comprises a first insulating part and a second insulating part, and the first insulating part and the second insulating part are oppositely arranged and enclose to form a first mounting cavity and a second mounting cavity; the circuit board is arranged in the first mounting cavity; the conducting strip is arranged in the second mounting cavity and is electrically connected with the circuit board, the conducting strip is provided with a first electric junction surface exposed outside the first insulating part and a second electric junction surface exposed outside the second insulating part, and the projection of the first electric junction surface is at least partially overlapped with the projection of the second electric junction surface along the direction vertical to the board surface of the circuit board; the conductive sheet is integrally provided with an extending part, and the circuit board is electrically connected with the conductive sheet through the extending part. The extending part is integrally arranged on the conducting strip and is electrically connected with the circuit board through the extending part, so that the welding times are reduced, and the assembly process of the battery module is simplified.

Description

Integrated sampling assembly for battery and battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to an integrated sampling assembly for a battery and a battery module.

Background

Under the development of new energy automobile flame, the power battery requirement is greatly improved, the production cost and the battery safety become the focus of attention of an automobile enterprise and a battery enterprise, and therefore, the cost reduction and the optimization production process become urgent requirements of enterprise development. In the power battery, the conducting strip plays a role in conducting electricity, different electric cores are connected through the conducting strip, and then the conducting strip is electrically connected with the circuit board through an electrical connector which is additionally configured, so that the serial-parallel connection of the different electric cores is realized. When the electric connecting piece is used for connecting the conducting strip and the circuit board, one end of the electric connecting piece is required to be welded on the conducting strip, and the other end of the electric connecting piece is required to be welded on the circuit board, so that the electric connection between the conducting strip and the circuit board is realized. However, the electric connector needs to be welded with the circuit board and the conducting strip respectively, so that more welding procedures are caused, the risk of welding failure is increased, and the welding failure rate is relatively high. In addition, after the electric connecting piece and the conducting strip are welded, the whole firmness is weaker under the influence of a welding procedure, residual stress exists on the welding point, and the welding point is easy to break under the action of a larger external force. Accordingly, it is desirable to provide an integrated sampling assembly for a battery and a battery module.

Disclosure of Invention

In view of the above drawbacks of the prior art, an object of the present utility model is to provide an integrated sampling assembly for a battery and a battery module, so as to improve the problems of more connection points and poor reliability of the electrical connection between a conductive sheet and a circuit board in the prior art.

To achieve the above and other related objects, the present utility model provides an integrated sampling assembly for a battery, comprising: an insulating housing, a circuit board, and a conductive sheet.

The insulating shell comprises a first insulating part and a second insulating part, wherein the first insulating part and the second insulating part are oppositely arranged and enclose to form a first mounting cavity and a second mounting cavity;

the circuit board is arranged in the first mounting cavity;

the conductive sheet is arranged in the second mounting cavity and is electrically connected with the circuit board, the conductive sheet is provided with a first electric junction surface exposed outside the first insulation part and a second electric junction surface exposed outside the second insulation part, and the projection of the first electric junction surface is at least partially overlapped with the projection of the second electric junction surface along the direction perpendicular to the board surface of the circuit board; the circuit board is electrically connected with the conductive sheet through the protruding part.

In an embodiment of the present utility model, the protruding portion is welded to the circuit board, and at least one stress hole is formed in the protruding portion, and the stress hole penetrates through the protruding portion in a direction perpendicular to a board surface of the circuit board.

In an embodiment of the present utility model, the stress hole is a waist hole or a round hole.

In an embodiment of the present utility model, the extension portion is provided with a welding hole and two stress holes, the two stress holes are symmetrically arranged on the extension portion, and the welding hole is arranged on a symmetry axis of the two stress holes and forms a triangle arrangement with the two stress holes.

In an embodiment of the present utility model, a first positioning hole is formed on the conductive sheet, a second positioning hole is formed on the insulating housing, and the first positioning hole corresponds to the second positioning hole in position.

In an embodiment of the utility model, the conductive sheet includes a first busbar and a second busbar, where the first busbar and the second busbar are disposed opposite to each other on two sides of the circuit board and are electrically connected to the circuit board through the protruding portions, respectively.

In an embodiment of the present utility model, the protruding portion is in a strip shape, a connection groove adapted to the protruding portion is formed on the circuit board, and an end portion of the protruding portion is welded and connected into the connection groove.

In an embodiment of the utility model, the circuit board is a flexible circuit board.

In an embodiment of the present utility model, a battery module is further provided, including a plurality of electric cells, each of the electric cells has a pole, and further including the integrated sampling assembly for a battery described in any one of the above, where the integrated sampling assembly for a battery is disposed on each of the electric cells, and is in contact with and electrically connected to each of the poles.

In one embodiment of the utility model, the second electrical junction is welded to the pole.

In summary, the present utility model provides an integrated sampling assembly for a battery. Through be provided with the extension on the conducting strip an organic whole, only need during the electricity connection with the tip and the circuit board electricity of extension be connected can, compare in prior art reduced the quantity of tie point, effectively reduced the failure rate of electric connection, promoted the whole firmness between conducting strip and the extension simultaneously, greatly increased the reliability of conducting strip. In addition, the integrated component for the battery is provided with a first electric junction surface exposed outside the first insulating part and a second electric junction surface exposed outside the second insulating part on the conducting sheet, and the projection of the first electric junction surface and the projection of the second electric junction surface are at least partially overlapped along the direction vertical to the board surface of the circuit board, and the structure is favorable for connecting the terminal post of the battery core and the conducting sheet in a laser welding mode. The battery module comprises the integrated sampling assembly for the battery, so that the reliability is higher, and the integrated sampling assembly for the battery is used, so that the assembly process of the battery module is greatly simplified.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of an integrated sampling assembly for a battery in accordance with one embodiment of the present utility model;

FIG. 2 is an exploded view of an alternative embodiment of an integrated sampling assembly for a battery in accordance with the present utility model;

FIG. 3 is an enlarged view of a portion of region I of FIG. 2;

FIG. 4 is an enlarged view of a portion of region II of FIG. 2;

FIG. 5 is a schematic diagram showing a structure of a connection between a conductive sheet and a circuit board according to an embodiment of the utility model;

FIG. 6 is a schematic diagram showing the stamping positions of adjacent conductive sheets according to an embodiment of the utility model;

fig. 7 is a schematic structural diagram of a conductive sheet according to an embodiment of the utility model.

Description of element numbers:

100. an insulating housing; 110. a first insulating portion; 111. a first concave portion; 1110. a first exposure hole; 112. a third recess; 120. a second insulating portion; 121. a second concave portion; 1210. a second exposure hole; 130. a second positioning hole; 200. a circuit board; 300. a conductive sheet; 310. a first bus bar; 320. a second bus bar; 330. an extension; 331. stress holes; 332. welding holes; 340. a material reduction groove; 350. a first positioning hole; 360. a conductive sheet depression; 370. a first electrical junction.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Please refer to fig. 1 to 7. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.

Referring to fig. 1, fig. 1 is an exploded view of an integrated sampling assembly for a battery according to an embodiment of the present utility model. The utility model provides an integrated sampling assembly for a battery and a battery module. The conductive sheet 300 of the integrated sampling assembly for a battery is integrally provided with an extension 330, and is electrically connected to the circuit board 200 through the extension 330. Compared with the prior art, the number of connection points is reduced, the electrical connection failure rate is effectively reduced, the overall firmness between the conductive sheet 300 and the protruding part 330 is improved, and the reliability of the conductive sheet 300 is increased.

Referring to fig. 1, in an embodiment of the present utility model, the integrated sampling assembly for a battery includes: an insulating housing 100, a circuit board 200, and a conductive sheet 300.

The insulating housing 100 includes a first insulating portion 110 and a second insulating portion 120, and the first insulating portion 110 and the second insulating portion 120 are disposed opposite to each other and enclose a first mounting cavity (not shown in the drawings) in which the circuit board 200 is mounted and a second mounting cavity (not shown in the drawings) in which the conductive sheet 300 is mounted. Wherein the first insulating part 110 and the second insulating part 120 have a sheet shape so as to entirely encapsulate the elongated circuit board 200 therein. The type of the insulating case 100 is not limited as long as it has insulating and isolating functions, such as a thermo-compression film or a plastic-suction isolating plate.

The circuit board 200 is mounted in the first mounting cavity. Specifically, the end surface of the first insulating portion 110 has a third recess 112 (recess when viewed from the circuit board 200 side) open to the second insulating portion 120 side, and the shape of the third recess 112 is adapted to the shape of the circuit board 200. The contact portion of the second insulating portion 120 and the circuit board 200 is a plane, and when the first insulating portion 110 is fastened to the second insulating portion 120, the third recess portion 112 and the plane on the second insulating portion 120 enclose a first mounting cavity for mounting the circuit board 200.

Referring to fig. 1 to 3, fig. 2 is an exploded view of an integrated sampling assembly for a battery according to another angle of the present utility model, and fig. 3 is a partially enlarged view of area I of fig. 2. The conductive sheet 300 is mounted in the second mounting cavity and electrically connected to the circuit board 200, and the conductive sheet 300 has a first electrical junction 370 exposed outside the first insulating portion 110 and a second electrical junction (not shown) exposed outside the second insulating portion 120, and a projection of the first electrical junction 370 and a projection of the second electrical junction at least partially overlap in a direction perpendicular to a board surface of the circuit board 200. Wherein, the conductive sheet 300 is integrally provided with an extension 330, and the circuit board 200 and the conductive sheet 300 are electrically connected through the extension 330. Specifically, the first insulating portion 110 further has a first recess 111 (recess when viewed from the conductive sheet 300 side) formed on an end surface thereof and adapted to the shape of the conductive sheet 300, the first recess 111 has a first exposure hole 1110 formed therein, the second insulating portion 120 has a second recess 121 (recess when viewed from the conductive sheet 300 side) formed therein and adapted to the shape of the first recess 111 in a position corresponding thereto, and the second recess 121 has a second exposure hole 1210 formed therein. When the first insulating portion 110 is snapped onto the second insulating portion 120, the first recess 111 and the second recess 121 are aligned with each other to form a second mounting cavity for receiving the conductive sheet 300. Further, considering that in the battery module, it is necessary to electrically connect the conductive tab 300 and the terminal post of the battery cell by welding, the insulating case 100 cannot completely enclose the conductive tab 300. There is a first electrical junction 370 and a second electrical junction on the conductive sheet 300 that are exposed outside the electrically insulating housing 100 and are disposed opposite. Specifically, the first electrical junction 370 is exposed to the outside of the first recess 111 through the first exposure hole 1110, and the second electrical junction is exposed to the outside of the second recess 121 through the second exposure hole 1210. And the projection of the first electric connection surface 370 along the direction perpendicular to the board surface of the circuit board 200 and the projection of the second electric connection surface along the direction perpendicular to the board surface of the circuit board 200 are at least partially overlapped, so as to adopt laser welding.

Referring to fig. 2-4, fig. 4 shows an enlarged view of a portion of region II in fig. 2. In an embodiment of the present utility model, the extension portion 330 is welded to the circuit board 200, at least one stress hole 331 is formed in the extension portion 330, and the stress hole 331 penetrates the extension portion 330 along a direction perpendicular to the board surface of the circuit board 200. Since the extension 330 and the circuit board 200 are connected by soldering, electrical conductivity is provided between the extension 330 and the circuit board 200, and electrical connection between the extension 330 and the circuit board 200 is achieved. However, during welding, the protruding portion 330 is easily deformed due to the stress, so that the protruding portion 330 is broken. In order to avoid the above, one or more stress holes 331 are formed in the protruding portion 330 in a direction perpendicular to the board surface of the circuit board 200 to release stress generated during soldering and protect the protruding portion 330 from being broken. The specific position of the stress hole 331 on the extension 330 is not limited, as long as the stress hole can release stress during the welding process.

With continued reference to fig. 2 to 4, if the edge of the stress hole 331 has a sharp corner (e.g., a rectangular, triangular, etc. structure), there is a phenomenon of stress concentration on the sharp corner of the stress hole 331 when the stress hole 331 is broken, the sharp corner will first break, so that the protruding portion 330 is damaged. To avoid this, in one embodiment of the present utility model, the stress hole 331 is a waist hole or a round hole. This is because the edges of the circular or waist holes are smooth curves, and stress concentration is less pronounced in such stress holes 331 with smooth curves than in shapes with non-smooth edges, thereby better avoiding breakage of the protrusions 330.

Referring to fig. 2 to 5, fig. 5 is a schematic structural diagram illustrating connection between a conductive sheet and a circuit board according to an embodiment of the utility model. In an embodiment of the utility model, the extension portion 330 is provided with a welding hole 332 and two stress holes 331, the two stress holes 331 are symmetrically arranged on the extension portion 330, and the welding hole 332 is arranged on the symmetry axis of the two stress holes 331 and forms a triangle arrangement with the two stress holes 331. On the end face of the protruding portion 330, two identical stress holes 331 are symmetrically formed, and the symmetry axes of the two stress holes 331 are parallel to the extending direction of the protruding portion 330. The soldering hole 332 is opened on the symmetry axis, and the connection between the conductive sheet 300 and the circuit board 200 is achieved through the soldering hole 332. Further, the soldering apertures 332 are located near the side of the extension 330 facing away from the conductive sheet 300 and form a triangular arrangement with the two stress apertures 331. This arrangement ensures that the extension 330 is firmly connected to the circuit board 200, and also releases stress to the maximum, thereby improving the reliability of connection between the components and prolonging the service life of the conductive sheet 300.

Referring to fig. 2, 3 and 5, in an embodiment of the utility model, a first positioning hole 350 is formed on the conductive sheet 300, a second positioning hole 130 is formed on the insulating housing 100, and the first positioning hole 350 corresponds to the second positioning hole 130. So that the second positioning hole 130 and the first positioning hole 350 are aligned by moving the conductive sheet 300 and the circuit board 200 when the conductive sheet 300 and the circuit board 200 are placed on the second insulating portion 120. Further, a first positioning hole 350 may be formed at a position of the conductive sheet 300 deviated from the middle position, for example, the first positioning hole 350 may be formed at a position of the end surface of the conductive sheet 300 close to the edge, so that when the conductive sheet 300 and the circuit board 200 are mounted in the insulating housing 100, the orientation of the conductive sheet 300 during mounting can be recognized, and the situation of reversely mounting the conductive sheet 300 and the circuit board 200 is prevented. Correspondingly, the second positioning holes 130 on the first insulating portion 110 and the second insulating portion 120 may be respectively disposed at intermediate positions of the first insulating portion 110 and the second insulating portion 120. By providing the first positioning hole 350 and the second positioning hole 130, the positioning of the conductive sheet 300 in the insulating housing 100 is facilitated by aligning the first positioning hole 350 and the second positioning hole 130, which is helpful for shortening the assembly time and improving the working efficiency.

With continued reference to fig. 2, 3 and 5, in an embodiment of the utility model, the conductive sheet 300 includes a first bus bar 310 and a second bus bar 320, where the first bus bar 310 and the second bus bar 320 are disposed opposite to each other on two sides of the circuit board 200 and are electrically connected to the circuit board 200 through the protruding portions 330, respectively. It is to be understood that the number of the first bus bars 310 and the second bus bars 320 is not limited, and may be one or more. When the first bus bar 310 or the second bus bar 320 is plural, each of the first bus bar 310 or the second bus bar 320 is connected to the circuit board 200 through one protrusion 330, and a person skilled in the art can adaptively set the number of the first bus bars 310 or the second bus bars 320 according to the number of the battery cells in the battery module, which is not limited herein. It is understood that the number of second mounting cavities and the number of conductive tabs 300 may be correspondingly arranged.

Referring to fig. 1, 3 and 5, in an embodiment of the present utility model, the protruding portion 330 is in a strip shape, a connection slot (not shown in the drawings) adapted to the protruding portion 330 is formed on the circuit board 200, and an end portion of the protruding portion 330 is soldered into the connection slot to achieve electrical connection between the protruding portion 330 and the circuit board 200. The end surface of the circuit board 200 facing the first insulating portion 110 is provided with a connection groove adapted to the shape of the protruding portion 330. The connecting groove can play the guide effect to the extension part 330 on the one hand, is convenient for put the extension part 330 on the circuit board 200 fast and accurately, and on the other hand can also play the fixed action to the extension part 330, reduces the welding in-process, and the extension part 330 rocks for the circuit board 200 to lead to the inaccurate condition of welding position.

Referring to fig. 1-3, the types of circuit boards 200 in this application include, but are not limited to, printed circuit boards (PrintedCircuitBoard, PCB), flexible circuit boards (FlexiblePrintedCircuit, FPC), but to promote flexibility of the circuit board 200 and further reduce overall weight. In one embodiment of the present utility model, the circuit board 200 is a flexible circuit board. When the integrated sampling assembly for the battery is used for connecting with the battery core, the flexible circuit board 200 can be freely bent and wound according to the position of the battery core, leads inside the circuit board 200 cannot be damaged, and the size and weight of the battery module are greatly reduced.

Referring to fig. 1, 5 and 6, fig. 6 is a schematic view illustrating a position of adjacent conductive sheets during stamping according to an embodiment of the utility model. It is contemplated that a plurality of conductive sheets 300 may be formed on one sheet of aluminum material by punching. Since the conductive sheet 300 has the protruding portion 330 protruding outward, the protruding portion 330 is cut out of the aluminum material at the same time during punching, resulting in waste of the aluminum material. To avoid this, in an embodiment of the present utility model, the conductive sheet 300 is provided with a material reducing groove 340, and the material reducing groove 340 is located opposite to the protruding portion 330 on two sides of the conductive sheet 300. In the case of punching, the protruding portion 330 of the rear one of the conductive sheets 300 is formed by cutting the material-reducing groove 340 of the front one of the conductive sheets 300 with respect to the adjacent two conductive sheets 300. I.e., the cut aluminum material of the material reduction groove 340, can be used to form the protruding portion 330 of the latter conductive sheet 300, avoiding the waste of the aluminum material. Therefore, the material reduction grooves 340 and the protruding portions 330 are symmetrically arranged on two sides of the conductive sheet 300, so that the contact area between the electrode post of the battery core and the conductive sheet 300 is not affected, the waste of aluminum materials is effectively reduced, and the production cost is saved.

Referring to fig. 1 and fig. 7, fig. 7 is a schematic structural diagram of a conductive sheet according to an embodiment of the utility model. In one embodiment of the present utility model, the conductive sheet 300 has a conductive sheet recess 360 thereon. The conductive sheet depression 360 is depressed inward from the end surface of the conductive sheet 300, and penetrates the conductive sheet 300 in the extending direction of the protruding portion 330. Through conducting strip depressed part 360, effectively avoid taking place to interfere between conducting strip 300 and the great utmost point post of external diameter, ensure smooth and easy connection of conducting strip 300 and utmost point post.

Referring to fig. 1, in an embodiment of the present utility model, a battery module is further provided, which includes a plurality of battery cells and the integrated sampling assembly for a battery of any of the above embodiments, each battery cell has a pole with opposite polarity, and the integrated sampling assembly for a battery is disposed on the battery cell, and is in contact with and electrically connected to the pole of each battery cell through a conductive sheet 300. Thereby realizing the electric connection among the battery cells. In addition, the conductive sheet 300 may collect temperature information of the battery cell and transmit the temperature information to the outside through a corresponding device to complete data exchange with the outside. Through using this battery to use integrated sampling subassembly to realize the electricity connection between the electric core to the battery module assembly process who constitutes is simple, and more accurate sampling the electric core has greatly promoted battery module's wholeness ability. Further, in an embodiment of the present utility model, the second electrical junction is welded to the pole. The integrated sampling component for the battery can be arranged at the top of the battery core, and the electrode post is welded on the second electric junction surface through a laser welding procedure, so that the electrode post and the second electric junction surface have conductivity, and the electric connection between the integrated sampling component for the battery and the battery core is realized.

In summary, in the present utility model, unlike the conventional method in which a nickel plate or a sampling terminal is used as an independent component, when the conductive plate and the circuit board are connected, the nickel plate or the sampling terminal is made of nickel, and when the nickel plate or the sampling terminal is welded to the conductive plate made of aluminum, the problems of cold joint, penetration, explosion and the like easily occur in the welding of different metal materials. According to the conductive sheet and the circuit board, the extending part extending outwards is integrally arranged on the conductive sheet, and only the extending part and the circuit board are required to be welded, so that the conductive sheet and the circuit board can be electrically connected. The direct welding mode of the circuit board and the conducting strip effectively reduces the risk of cold joint, reduces the welding failure rate and enhances the overall firmness between the conducting strip and the circuit board. In addition, the circuit board and the conductive sheet are respectively embedded into the insulating shell, and the circuit board and the conductive sheet are moved to the required positions together through the insulating shell, so that force and displacement among all parts in the moving process are effectively avoided. Further, the conductive sheet is also provided with a first electric junction surface and a second electric junction surface exposed outside the insulating shell, and the projection of the first electric junction surface and the projection of the second electric junction surface are partially or completely overlapped along the direction vertical to the board surface of the circuit board so as to be beneficial to laser welding. The method reduces welding procedures, greatly simplifies the assembly process of the battery module, and accordingly can optimize production equipment and process, save working hours better, and reduce cost and increase efficiency for enterprises. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. An integrated sampling assembly for a battery, comprising:

the insulation shell comprises a first insulation part and a second insulation part, wherein the first insulation part and the second insulation part are oppositely arranged and enclose to form a first installation cavity and a second installation cavity;

the circuit board is arranged in the first mounting cavity;

the conducting strip is arranged in the second mounting cavity and is electrically connected with the circuit board, the conducting strip is provided with a first electric junction surface exposed outside the first insulating part and a second electric junction surface exposed outside the second insulating part, and the projection of the first electric junction surface is at least partially overlapped with the projection of the second electric junction surface along the direction perpendicular to the board surface of the circuit board;

the circuit board is electrically connected with the conductive sheet through the protruding part.

2. The integrated sampling assembly for a battery of claim 1, wherein the protruding portion is welded to the circuit board, and at least one stress hole is formed in the protruding portion, and the stress hole penetrates through the protruding portion in a direction perpendicular to the board surface.

3. The integrated sampling assembly for a battery of claim 2, wherein the stress hole is a waist hole or a round hole.

4. The integrated sampling assembly for a battery according to claim 2, wherein the protruding portion is provided with a welding hole and two stress holes, the two stress holes are symmetrically formed in the protruding portion, and the welding holes are formed in symmetry axes of the two stress holes and form triangular arrangement with the two stress holes.

5. The integrated sampling assembly for a battery according to claim 1, wherein the conductive sheet is provided with a first positioning hole, the insulating housing is provided with a second positioning hole, and the first positioning hole corresponds to the second positioning hole in position.

6. The integrated sampling assembly for a battery according to claim 1, wherein the conductive sheet includes a first bus bar and a second bus bar, the first bus bar and the second bus bar being disposed opposite to each other on both sides of the circuit board and electrically connected to the circuit board through the protruding portions, respectively.

7. The integrated sampling assembly for a battery according to claim 1, wherein the protruding portion is elongated, a connecting groove adapted to the protruding portion is formed in the circuit board, and an end portion of the protruding portion is welded and connected into the connecting groove.

8. The integrated sampling assembly for a battery of claim 1, wherein the circuit board is a flexible circuit board.

9. A battery module comprising a plurality of cells each having a post thereon, and further comprising the integrated sampling assembly for a battery according to any one of claims 1 to 8, the integrated sampling assembly for a battery being provided on each of the cells, and being in contact with and electrically connected to each of the posts.

10. The battery module of claim 9, wherein the second electrical junction is welded to the post.