Sampling piece

Abstract

The utility model relates to the field of flexible connection, in particular to a sampling piece, which comprises a flexible board, a first connecting part and a second connecting part, the flexible board comprises a plurality of buffer parts and extension parts, two ends of the flexible board are respectively connected with the first connecting part and the second connecting part, the first connecting part is used for connecting a circuit board, and the second connecting part is used for connecting the circuit board. The second connecting part is used for connecting the battery cell, and the plurality of buffer parts of the flexible plate can prevent the connection failure of the sampling piece, the circuit board and the battery cell under the dynamic working condition of the battery assembly, so that the reliability of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the field of flexible connections, and specifically relates to a sampling component. Background Art

[0002] The sampling component of a battery module is mainly used to collect voltage information of battery cells. Currently, nickel sheets are generally used in the sampling component to weld the circuit board and the battery cells respectively for the circuit board to collect the voltage information of the battery cells. In vehicles or other electrical equipment using the battery module, the welding points between the voltage sampling component, the circuit board and the battery cells may fail under dynamic working conditions. Summary of the Utility Model

[0003] An embodiment of the present application provides a sampling component. By arranging a flexible board in the sampling component, electrical equipment can avoid the failure of the welding points between the sampling sheet, the battery cells and the circuit board in the battery module due to vibration and impact during the movement working condition, further improving the stability and reliability of the battery module and enhancing the product quality.

[0004] When the included angles between the first buffer part and the second buffer part of the flexible board facing the first direction and the second direction respectively are less than 90°, the placement positions of the first connecting part and the second connecting part will be restricted. The utility model sets the included angle between the first direction and the second direction to be greater than 90°, which can make the design of the first connecting piece and the second connecting piece more flexible. The sampling component can better adapt to various battery modules, improving the stability and reliability of the product, and can make the position design of the circuit board and the battery cells more flexible.

[0005] A sampling component according to the utility model includes a first connecting part, a second connecting part and a flexible board. The flexible board includes a buffer part, a first end part and a second end part. The buffer part connects the first end part and the second end part. The buffer part includes a first buffer part and a second buffer part. The first buffer part is bent towards the first direction, and the second buffer part is bent towards the second direction;

[0006] The included angle between the second direction and the first direction is greater than ninety degrees;

[0007] The first connecting part is fixedly connected to the first end part;

[0008] The second connecting part is fixedly connected to the second end part.

[0009] In some embodiments, the flexible board further includes an extension part, and the extension part is used to connect the first end part, or the second end part, or the buffer part.

[0010] In some embodiments, one end of the extension part is connected to the first end part, and the other end of the extension part is connected to the buffer part.

[0011] In some embodiments, one end of the extension portion is connected to the second end portion, and the other end of the extension portion is connected to the buffer portion.

[0012] In some embodiments, one end of the extension portion is connected to the first buffer portion, and the other end of the extension portion is connected to the second buffer portion.

[0013] In some embodiments, both the first connection portion and the second connection portion are metal parts, and there is a fixed electrical connection among the first connection portion, the flexible board, and the second connection portion.

[0014] In some embodiments, the first connection portion and the second connection portion are nickel sheets.

[0015] In some embodiments, the flexible board is a metal part.

[0016] In some embodiments, the flexible board is a nickel sheet.

[0017] In some embodiments, the flexible board further includes a plurality of grooves, and the depth of the grooves is less than the thickness of the flexible board or the grooves penetrate in the thickness direction of the flexible board.

[0018] In some embodiments, the configuration of the grooves is a curve, a broken line, or a combination of a curve and a broken line.

[0019] In some embodiments, the maximum width of the first end portion and / or the second end portion of the flexible board is greater than the maximum width of the buffer portion.

[0020] In some embodiments, the flexible board is a flexible circuit board, and the flexible circuit board includes circuit elements, and the circuit elements are electrically connected to the first connection portion and the second connection portion respectively.

[0021] In some embodiments, the number of the first buffer portions is multiple, the number of the second buffer portions is multiple, and the first buffer portions and the second buffer portions are arranged alternately.

[0022] In some embodiments, the included angle between the second direction and the first direction is 180°.

[0023] In some embodiments, the first connection portion is provided with a through hole.

[0024] This application further provides a battery assembly, which includes the sampling piece, the circuit board, and the battery cell as described in any one of the above, and the sampling piece is connected to the circuit board and the battery cell.

[0025] The present application also provides an electrical device, which includes the battery assembly described in any of the above embodiments. Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the embodiments of the present application. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0027] Figure 1 is a perspective view of a sampling piece of some embodiments of the present application;

[0028] Figure 2 is a perspective view of a sampling piece of some embodiments of the present application;

[0029] Figure 3 is a perspective view of a sampling piece of some embodiments of the present application;

[0030] Figure 4 is a perspective view of a sampling piece of some embodiments of the present application;

[0031] Figure 5 is a perspective view of a sampling piece of some embodiments of the present application;

[0032] Figure 6 is Figure 5 a flat layout diagram of

[0033] Figure 7 is a perspective view of a sampling piece of some embodiments of the present application;

[0034] Figure 8 is Figure 7 a flat layout diagram of

[0035] Figure 9 is a perspective view of a sampling piece of some embodiments of the present application;

[0036] Figure 10 is Figure 9 a flat layout diagram of

[0037] Figure 11 is an exploded view of a battery assembly of some embodiments of the present application;

[0038] Figure 12 is Figure 11 a partial enlarged view of

[0039] Main Element Symbol Explanation:

[0040] 12 - First connection end, 11 - Flexible board, 10 - Second connection end, 111 - Buffer part, 1111 - First buffer part, 1112 - Second buffer part, 113 - Extension part, 115 - First end part, 117 - Second end part, 13 - Flexible printed circuit board FPC, 14 - Flexible board nickel sheet, 15 - Strip-shaped groove, 16 - Depression, 17 - Circular groove, 18 - Pole of the battery cell, 19 - Fixed bracket, 20 - Sampling component, 21 - Circuit board, 22 - Through hole, 23 - Battery cell Detailed implementation manners

[0041] The following details the implementation manners of the present application. The examples of the implementation manners are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The implementation manners described below with reference to the accompanying drawings are exemplary and are only used to explain the implementation manners of the present application, and should not be construed as a limitation to the implementation manners of the present application.

[0042] In the description of the present application, it should be understood that the orientation or positional relationships indicated by terms such as "thickness", "upper", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. Also, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0043] Currently in the industry, it is common to use a sampling component to achieve electrical connection between the battery cell and the circuit board, so as to collect information such as the voltage of the battery cell. At present, sampling chips generally use nickel sheets. The two ends of the nickel sheet are respectively welded to the circuit board and the battery cell to achieve electrical connection, so as to collect information such as the voltage of the battery cell. However, when a vehicle or other electrical equipment using the battery assembly is in a dynamic working condition, it will cause vibration and shock to the battery assembly. When the battery assembly is under the influence of continuous vibration and shock, the welding points between the nickel sheet and the circuit board and the welding points between the nickel sheet and the battery cell will generate impact forces on each other. At this time, the welding points between the sampling component and the circuit board and the battery cell will fail, such as the sampling component detaching from the circuit board or the battery cell, so that the battery assembly cannot collect information such as the voltage of the battery cell, increasing the usage risk of the battery assembly.

[0044] The present application provides a sampling component, which can effectively avoid the situation of solder joint failure caused by vibration and impact of the battery module under moving conditions. A sampling component provided by the present application includes a first connecting portion, a second connecting portion and a flexible plate. The flexible plate includes a buffer portion, and the buffer portion includes a first buffer portion and a second buffer portion. Both the first buffer portion and the second buffer portion are bent connecting plates. The angles formed by the bending of the first connecting portion and the bending of the second connecting portion are both less than 180°. By providing a flexible plate with a buffer portion between the first connecting portion and the second connecting portion, a flexible connection is formed between the first connecting portion and the second connecting portion. The flexible connection enables the sampling component to have the ability to resist dynamic conditions, that is, after the first connecting portion is connected to the circuit board and the second connecting portion is connected to the battery cell, when the battery module generates vibration and impact under moving conditions, the solder joints of the first connecting portion will not be affected by the tensile force of the solder joints of the second connecting portion, thereby improving the ability of the battery module to resist dynamic conditions. The following will refer to Figure 11 and Figure 12 for a more specific description.

[0045] Please refer to Figure 11 and Figure 12 , the battery module includes a circuit board, a sampling component, and a battery cell. A welding area (not shown in the figure) is provided on the circuit board, and a pole post is provided at one end of the battery cell. In some embodiments, the battery module further includes a fixing bracket. In some embodiments, the first connecting portion 12 of the sampling component has a through hole 22. It should be noted that the through holes on the first connecting portion can be two as shown in the figure, or one or more. The shape of the through hole can be circular, square or irregular, and no limitation is made here. The through hole 22 is soldered to the welding area of the circuit board, and the second connecting portion 10 of the sampling component is soldered to the pole post of the battery cell. It should be noted that soldering is only one of the connection methods between the sampling component and the battery cell and the circuit board, and other connection methods that can be used to connect the sampling component to the battery cell and the circuit board can be used in this application, and no limitation is made here.

[0046] Please refer to Figure 1, A sampling component provided by an embodiment of the present application includes a first connecting portion 12, a flexible plate 11, and a second connecting portion 10. The flexible plate 11 includes a first end portion 115 and a second end portion 117. The first connecting portion 12 is fixedly connected to the first end portion 115, and the second connecting portion 10 is fixedly connected to the second end portion 117. A buffer portion 111 is further included between the first end portion 115 and the second end portion 117. The buffer portion 111 includes a plurality of first buffer portions 1111 and a plurality of second buffer portions 1112. The first buffer portion 1111 is a plate body bent in a first direction, and after the first buffer portion is bent in the first direction, an angle less than 180° is formed; the second buffer portion 1112 is a plate body bent in a second direction, and after the second buffer portion is bent in the second direction, an angle less than 180° is formed. The angle between the first direction and the second direction is greater than 90°. In some embodiments, the second direction is the opposite direction of the first direction, that is, the angle between the first direction and the second direction is 180°. When the electrical device generates vibration and impact under the operating condition of motion, causing tension or compression on the first connecting portion 12 or the second connecting portion 10, the first buffer portion 1111 and the second buffer portion 1112 will deform. Specifically, the bending angles of the first buffer portion 1111 and the second buffer portion may become larger due to tension, or the bending angles of the first buffer portion 1111 and the second buffer portion may become smaller due to pressure; when the first connecting portion 12 and the second connecting portion 10 are simultaneously subjected to tension or pressure, the buffer portion will also adjust the angles of the first buffer portion 1111 and / or the second buffer portion 1112 due to the tension or pressure, so as to absorb the impact force from the first connecting piece or the second connecting piece.

[0047] Regarding the definitions of the first direction and the second direction, a detailed description is given here. The first direction and the second direction are located in the angle between the first buffer portion and the second buffer portion, and are perpendicular to the tangent direction of the lowest point of the first buffer portion and the second buffer portion. Generally speaking, a bent line is divided into points, and tangents of the bent line are drawn at each point. The tangents at each point will have an angular change. When the angular change of the tangents of the two closest points to a point is the largest, this point is defined as the lowest point. A tangent is drawn at the lowest point, and the direction perpendicular to this tangent and facing the bent angle is the first direction or the second direction.

[0048] Please continue to refer to Figure 1 , In some embodiments of the present application, the sampling component further includes an extension portion. The first end portion 115 is connected to one of the second buffer portions 1112 through the extension portion 113, and the second end portion 117 is connected to one of the first buffer portions 1111 through the extension portion. Each first buffer portion 1111 and each second buffer portion 1112 are connected by the extension portion 113. Thus, the first buffer portion and the second buffer portion are alternately arranged in the flexible plate and are connected by the extension portion 113.

[0049] In the above-described embodiment, the first end portion 115 may be connected to the first buffer portion 1111 through the extension portion 113, or may be connected to the second buffer portion 1112 through the extension portion 113, depending on the arrangement of the first end portion 115 and the first connection portion 12. The second end portion 117 may be connected to the first buffer portion 1112 through the extension portion 113, or may be connected to 1111 through the extension portion 113, depending on the arrangement of the second end portion 117 and the second connection portion 10. The orientations of the first end portion and the second end portion may be in all directions, and are not limited herein.

[0050] In an embodiment of the present application, the sampling member is used to electrically connect the battery cells and the circuit board in the battery assembly, so that the circuit board can collect information such as the voltage of the battery cells. In an embodiment of the present application, both the first connection portion and the second connection portion are metal parts, and the first connection portion 12, the flexible board 11, and the second connection portion 10 are fixedly electrically connected to collect information such as the voltage of the battery cells.

[0051] In an embodiment of the present application, both the first connection piece and the second connection piece are nickel pieces. However, the first connection piece and the second connection piece in the present application are not limited to nickel pieces, and may also be made of materials including but not limited to copper pieces, aluminum pieces, etc. It should be noted that the first connection piece and the second connection piece are not necessarily of the same material, and may also be of different materials, which will not be elaborated herein.

[0052] In an embodiment of the present application, when both the first connection piece and the second connection piece are nickel pieces, it is preferably that the thicknesses of the first connection piece and the second connection piece are 0.1 mm - 1 mm in this embodiment.

[0053] In one embodiment of the present application, the flexible board is a flexible printed circuit board (FPC). A flexible printed circuit board is generally a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as the substrate, with the characteristics of high wiring density, light weight, thin thickness, and good bendability. When the flexible board 11 is a flexible printed circuit board, the first buffer portion and the second buffer portion can be better adapted to withstand the tensile or compressive forces from the first end and the second end, and the tensile or compressive forces from the first end or the second end can be reduced through the stretching or compression of the first buffer portion and the second buffer portion, so that neither the first connecting portion nor the second connecting portion will be deformed due to the tensile or compressive forces of each other, thus better avoiding the solder joint failure at the first connecting portion and the second connecting portion. To sum up, when the flexible board is a flexible printed circuit board, when the first connecting portion is connected to the circuit board of the battery assembly and the second connecting portion is connected to the battery cell of the battery assembly, when the battery assembly is in a moving working condition, tensile or compressive forces are generated at the first connecting portion and the second connecting portion due to vibration and impact. When the tensile or compressive forces are transmitted to the first end and the second end, the buffer portion of the flexible printed circuit board can reduce the tensile or compressive forces from the first end and the second end, so that the first end and the second end will not be affected by the tensile or compressive forces of each other, thus keeping the solder joints of the first connecting portion and the second connecting portion stable and the solder joints will not easily fail.

[0054] The flexible printed circuit board includes a substrate and circuit elements. These circuit elements can be copper wires. The copper wires are built in the substrate and both ends of the copper wires extend to the first end and the second end respectively. Through the connection of the copper wires with the first connecting portion 12 and the second connecting portion 10 respectively, the electrical connection from the first connecting portion 12 to the second connecting portion 10 on the sampling part is realized. It should be noted that the circuit elements in the flexible printed circuit board include but are not limited to metal materials such as copper wires, copper sheets, nickel wires, and aluminum wires. The shape of the metal material is not limited to wire, sheet, strip, etc. As long as the circuit element can realize the electrical connection between the first connecting piece and the second connecting piece.

[0055] In some embodiments, in addition to using polyimide or polyester film as the substrate to make the flexible printed circuit board, other thin film materials with a thickness less than 1 micron can also be used as the substrate, which is not limited here.

[0056] For an embodiment of the flexible board of the present application being a flexible printed circuit board, please refer to Figure 2 , and a professional flexible printed circuit board production device can be used to make the flexible printed circuit board into Figure 2Regarding the shape of the flexible circuit board FPC13, the flexible circuit board FPC13 is composed of a first buffer portion 1111, a second buffer portion 1112, and an extension portion 113. The second buffer portion is a zigzag plate with a flat bottom and both ends extending towards the same side. The second direction refers to the direction perpendicular to the flat bottom of the second buffer portion and bending towards both ends of the second buffer portion. Both ends of the second buffer portion 1112 extending towards the same side are connected to the first buffer portion 1111 through the extension portion 113, thereby realizing the alternating arrangement of the first buffer portion and the second buffer portion.

[0057] Another embodiment of the flexible board in this application is the flexible circuit board. Please refer to Figure 3 , the first buffer portion 1111 and the second buffer portion 1112 are U-shaped bent, and multiple extension portions 113 connecting the first buffer portion 1111 and the second buffer portion 1112 are parallel in a plane perpendicular to the flexible board.

[0058] It should be noted that the bent plate body includes, for example, Figure 2 the plate body with a flat bottom and both ends bent in the same direction as shown, and also includes, for example, Figure 3 the smoothly curved plate body as shown. In short, the bending of the plate body in the popular sense in Chinese is within the definition of the bending in this utility model and will not be restricted here.

[0059] In another embodiment of this application, the flexible board 11 is a metal part. By selecting a metal material with good flexibility and reasonably setting the thickness to make the flexible board, the purpose of this application can be achieved, that is, when the battery assembly is in a dynamic working condition, the connection failure of the combined sampling piece, the circuit board, and the battery cell can be avoided, and the reliability of the battery pack can be improved. The metal materials with good flexibility include but are not limited to nickel, copper, aluminum, etc. It should be noted that when the flexible board, the first connecting piece, and the second connecting piece are all metal materials, the sampling piece can be integrally formed or formed by fixed connection to form the sampling piece, which will not be elaborated here.

[0060] Please refer to Figure 4 , in another embodiment of this application, the flexible board is a nickel sheet. When the thickness of the flexible board nickel sheet 14 increases, the rigidity of the nickel sheet will increase accordingly. The rigidity will make the nickel sheet not easily deform, thus affecting the nickel sheet's absorption of the impact force from both ends of the flexible board. Therefore, in this embodiment, the thickness of the flexible board nickel sheet 14 is selected to be 0.05 mm - 0.4 mm. When the thickness of the flexible board nickel sheet 14 is within 0.05 mm - 0.4 mm, the flexible board nickel sheet 14 is relatively easy to deform, so that it can well absorb the impact force from both ends of the flexible board nickel sheet 14, in order to avoid the connection failure of the combined sampling piece, the circuit board, and the battery cell due to vibration and impact when the battery assembly is in a dynamic working condition, and improve the reliability of the battery pack.

[0061] Another embodiment of the flexible plate of the present application is a nickel sheet. The nickel sheet 14 of the flexible plate includes grooves, and the depth of the grooves is less than that of the nickel sheet 14 of the flexible plate or the grooves penetrate in the thickness direction of the nickel sheet 14 of the flexible plate. The purpose of providing grooves in the nickel sheet 14 of the flexible plate is to reduce the area or volume of the nickel sheet 14 of the flexible plate, thereby reducing the rigidity of the nickel sheet 14 of the flexible plate, and further making the nickel sheet 14 of the flexible plate more likely to deform when impacted at the end, so that the impact forces from the first end and the second end can be better absorbed to achieve the purpose of the present application, that is, to prevent the connection between the sampling part, the circuit board and the battery cell from failing due to vibration and impact under dynamic conditions of the battery assembly, and to improve the reliability of the battery pack. Therefore, the number of grooves can be single or multiple. The grooves can be arranged at regular intervals or without intervals. The grooves can be any combination of straight lines and / or curves, as long as the grooves can reduce the area or volume of the nickel sheet 14 of the flexible plate, and no limitation is made here.

[0062] Please refer to Figure 5 and Figure 6 , there are strip grooves 15 on the nickel sheet 14 of the flexible plate. Figure 6 is Figure 5 The laying-out drawing of the nickel sheet 14 of the flexible plate in

[0063] Another embodiment of the flexible plate of the present application is a nickel sheet. Please refer to Figure 7 and Figure 8 , Figure 8 is Figure 7 The laying-out drawing of the nickel sheet 14 of the flexible plate in Figure 7The middle part of the flexible plate nickel sheet 14 is concave, that is, at least one of the width of the first end 115 and the width of the second end 117 of the flexible plate nickel sheet 14 is greater than the width of the middle part of the flexible plate nickel sheet 14. It is also possible that the widths of the first end 115 and the second end 117 are both greater than the width of the middle part of the flexible plate nickel sheet 14. It should be noted that the widths of the first end 115 and the second end 117 may be equal or unequal. The embodiments that can be extended from this embodiment also include that the width of the first end is greater than the width of the middle part of the flexible plate nickel sheet 14, and the width of the middle part of the flexible plate nickel sheet 14 is greater than the width of the second end 117. The above embodiments can all achieve the purpose of reducing the area of the flexible plate nickel sheet 14, thereby reducing the rigidity of the flexible plate nickel sheet 14, so that the flexible plate nickel sheet 14 is more likely to deform when impacted at the end, and thus better absorb the impact force from the first end 115 and the second end 117, so as to achieve the purpose of this application, that is, to prevent the combined sampling sheet, the circuit board and the battery core connection from failing due to vibration and impact under dynamic working conditions of the battery assembly, and improve the reliability of the battery pack.

[0064] Please refer to Figure 9 and Figure 10 , there is a circular groove 17 on the flexible plate nickel sheet 14. Figure 10 is Figure 9 The flat layout diagram of the flexible plate nickel sheet 14 in. The function of the circular groove 17 is to reduce the area of the flexible plate nickel sheet 14, thereby reducing the rigidity of the flexible plate nickel sheet 14 and increasing the softness of the flexible plate nickel sheet 14, so that the flexible plate nickel sheet 14 is more likely to deform when impacted at the end, and thus better absorb the impact force from the first end and the second end, so as to achieve the purpose of this application, that is, to prevent the combined sampling sheet, the circuit board and the battery core connection from failing due to vibration and impact under dynamic working conditions of the battery assembly, and improve the reliability of the battery pack. It should be noted that the circular grooves can be arranged at intervals as shown in the figure, or arranged irregularly. The dimensions of the circular grooves are not limited here, and any grooves that can reduce the area or volume of the flexible plate are within the protection scope of this utility model.

[0065] Please refer to Figures 1 - 10 , it can be seen from the figure that the included angle between the first bending direction of the first buffer part and the second bending direction of the second buffer part is 180°. In the process of designing two buffer parts with flexible materials, when the first connecting part and the second connecting part are placed parallel, the bending directions of the first buffer part and the second buffer part will present an included angle of 180° in the natural state, that is, similar to Figures 1 - 8Various bending shapes. However, during the production of the flexible board, when the first connecting portion and the second connecting portion are not designed to be parallel, that is, in order to adapt to different battery modules or electrical devices, the relative positions of the first connecting portion and the second connecting portion may be adjusted. When the first connecting portion and the second connecting portion cannot be relatively parallel, the angle between the first direction and the second direction may be less than 180°. This design is usually to cooperate with the positions of the first connecting portion and the second connecting portion. Of course, when the angle between the first direction and the second direction is less than 180°, the overall design of the flexible board will be adjusted to adapt to the battery module or electrical device, which is not limited herein.

[0066] When the angle between the first direction and the second direction is less than 90°, the placement positions of the first connecting portion and the second connecting portion will be restricted. It can be seen that setting the angle between the first direction and the second direction to be greater than 90° in the present utility model can make the sampling member better adapt to various battery modules, and can make the position design of the circuit board and the battery cell more flexible. Moreover, when the angle between the first direction and the second direction is less than 90°, multiple first buffer portions and multiple second buffer portions cannot be designed. When there is only one first buffer portion and one second buffer portion, the impact resistance of the flexible board will be significantly reduced. It can be seen that setting the angle between the first direction and the second direction to be greater than 90° in the present utility model can not only enable the sampling member to withstand greater impact force, but also improve the stability and reliability of the product.

[0067] One or more embodiments of the present application further provide an embodiment of an electrical device. In this embodiment, the electrical device includes the battery module described in any one of the above. Since the electrical device uses the above battery module, the electrical device also has the technical effects of the above battery module. The electrical device can be an electric vehicle, a two- or three-wheeled electric vehicle, or a notebook computer or a mobile phone, etc., which will be carried to an electric vehicle or other devices with a moving working condition, and thus has a moving working condition.

[0068] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In the description of the present application, "a plurality of" means at least two, for example two, three, unless otherwise specifically defined.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A sampling piece, characterized in that: The sampling piece comprises: A flexible board, the flexible board comprising a buffer portion, a first end portion, and a second end portion, the buffer portion connecting the first end portion and the second end portion, the buffer portion comprising a first buffer portion and a second buffer portion, the first buffer portion being bent toward a first direction, and the second buffer portion being bent toward a second direction; The included angle between the second direction and the first direction is greater than ninety degrees; A first connecting portion, wherein the first connecting portion is fixedly connected to the first end portion; A second connecting portion, wherein the second connecting portion and the second end portion are fixedly connected.

2. The sampling piece according to claim 1, characterized in that: The flexible board further includes an extending portion, and the extending portion is used to connect the first end portion, the second end portion, or the buffer portion.

3. The sampling piece according to claim 2, characterized in that: One end of the extending portion is connected to the first end portion, and the other end of the extending portion is connected to the buffer portion.

4. The sampling piece according to claim 2, characterized in that: One end of the extending portion is connected to the second end portion, and the other end of the extending portion is connected to the buffer portion.

5. The sampling piece according to claim 2, characterized in that: One end of the extending portion is connected to the first buffer portion, and the other end of the extending portion is connected to the second buffer portion.

6. The sampling piece according to claim 1, characterized in that: The first connection part and the second connection part are both metal parts, and the first connection part, the flexible board, and the second connection part are fixedly electrically connected.

7. The sampling piece according to claim 6, characterized in that: The first connection part and the second connection part are nickel sheets.

8. The sampling piece according to claim 1, characterized in that: The flexible plate is a metal piece.

9. The sampling piece according to claim 8, characterized in that: The flexible plate is a nickel sheet.

10. The sampling piece according to claim 8, characterized in that: The flexible board further includes a plurality of grooves, the depth of the grooves being less than the thickness of the flexible board or the grooves penetrating the flexible board in the thickness direction.

11. The sampling piece according to claim 10, characterized in that: The groove is configured as a curve, a folded line, or a combination of a curve and a folded line.

12. The sampling piece according to claim 8, characterized in that: The maximum width of the first end portion and / or the second end portion of the flexible plate is greater than the maximum width of the buffer portion.

13. The sampling piece according to claim 1, characterized in that: The flexible board is a flexible circuit board. The flexible circuit board includes circuit elements. The circuit elements are electrically connected to the first connecting portion and the second connecting portion respectively.

14. The sampling piece according to claim 1, characterized in that: There are a plurality of the first buffer parts, there are a plurality of the second buffer parts, and the first buffer parts and the second buffer parts are arranged alternately.

15. The sampling piece according to claim 1, characterized in that: The included angle between the second direction and the first direction is 180°.

16. The sampling piece according to claim 1, characterized in that: The first connecting portion is provided with a through hole.

17. A battery assembly, characterized in that: The battery assembly comprises the sampling piece according to any one of claims 1 to 16, a circuit board and a battery cell, wherein the sampling piece connects the circuit board and the battery cell.

18. An electrical equipment, characterized in that: A battery assembly comprising the battery assembly described in claim 17.

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