Sampling assembly and battery pack

Abstract

The embodiment of the invention provides a sampling assembly and a battery pack, the sampling assembly comprises a body and a reinforcing plate, the body comprises two ends which are arranged away from each other along a first direction, the reinforcing plate is connected to at least one end of the body, and the reinforcing plate and the body are arranged in a stacked manner; wherein the two sides of the body in the second direction are each provided with a first side edge, the reinforcing plate is provided with a second side edge, the second side edge is arranged on the side close to the center of the body in the first direction, the second side edge is located between the first side edges on the two sides of the body, and the second side edge and the first side edges are arranged at intervals. According to the embodiment of the invention, the second side edge of the reinforcing plate is arranged between the first side edges of the body, so that the end part of the second side edge can avoid the first side edge, the first side edge is kept away from the second side edge with stress concentration, and the second side edge of the reinforcing plate is prevented from generating shearing force on the first side edge of the body; therefore, the risk that the body is torn is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a sampling component and a battery pack. Background Art

[0002] In order to ensure the safe and efficient operation of the battery system, a sampling component is provided in the battery pack to collect signals such as the voltage, current, and temperature of the battery cells in the battery pack. The sampling component includes a flexible circuit board and a connector connected to each other. Among them, various signals are collected through the flexible circuit board, and the flexible circuit board then transmits the collected signals to the connector.

[0003] In the related art, a reinforcement is provided at the position where the flexible circuit board is connected to the connector to enhance the structural strength of this position. However, stress concentration is likely to occur at the position where the reinforcement is provided on this flexible circuit board, resulting in tearing of the circuit board and affecting the structural stability and sampling reliability. Summary of the Invention

[0004] This application aims to provide a sampling component and a battery pack to solve the problem that the flexible circuit board in the acquisition component is prone to tearing.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a sampling component, including a first direction, a second direction, and a third direction that intersect pairwise. The sampling component includes: a body and a reinforcing plate. The body includes two ends disposed away from each other along the first direction. The reinforcing plate is connected to at least one end of the body, and the reinforcing plate and the body are stacked along the third direction; wherein,

[0007] The body has first side edges on both sides along the second direction. The reinforcing plate has a second side edge. The second side edge is disposed on the side close to the center of the body along the first direction. The second side edge is located between the first side edges on both sides of the body, and the second side edge is spaced from the first side edge.

[0008] In a second aspect, this application also discloses a battery pack, including a box body, a battery, and the sampling component as described in any one of the above; wherein,

[0009] A receiving cavity is provided in the box body. The battery is disposed in the receiving cavity. The sampling component is connected to the battery to collect information of the battery.

[0010] In the embodiment of the present application, the reinforcing plate is connected to at least one end of the body along the first direction, and the two are stacked. The setting of the reinforcing plate strengthens the body, ensuring the structural rigidity of the position where the flexible circuit board is provided with the reinforcing plate and making it not easily deformed. Further, when an external force acts on the body, stress concentration is more likely to occur at the position where the second side of the body intersects with the reinforcing plate. In the embodiment of the present application, by setting the second side of the reinforcing plate to be located between the first sides of the body, the end of the second side can be arranged to avoid the first sides, so that the first sides are avoided from the second sides where stress concentration exists, preventing the second side of the reinforcing plate from generating a shearing force on the first side of the body, thereby reducing the risk of the body being torn.

[0011] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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, in which:

[0013] Figure 1 is a schematic structural diagram of a flexible circuit board in the prior art;

[0014] Figure 2 is a partially enlarged schematic diagram of a flexible circuit board in the prior art;

[0015] Figure 3 is Figure 2 a partially enlarged schematic diagram of part A in

[0016] Figure 4 is a schematic structural diagram of a flexible circuit board in an embodiment of the present application;

[0017] Figure 5 is a partially enlarged schematic diagram of a flexible circuit board in an embodiment of the present application;

[0018] Figure 6 is Figure 5 a partially enlarged schematic diagram of part B in

[0019] Figure 7 is Figure 5 a partially enlarged schematic diagram of part C in

[0020] Figure 8 is a schematic diagram of the connection between the reinforcing plate and the connector in an embodiment of the present application;

[0021] Figure 9 is one of the schematic structural diagrams of the reinforcing plate in the prior art;

[0022] Figure 10 is another schematic structural diagram of the reinforcing plate in the prior art;

[0023] Figure 11 is the third schematic structural view of the reinforcing plate in the prior art;

[0024] Figure 12 is one of the schematic structural views of the reinforcing plate in the embodiment of the present application;

[0025] Figure 13 is the second schematic structural view of the reinforcing plate in the embodiment of the present application;

[0026] Figure 14 is the third schematic structural view of the reinforcing plate in the embodiment of the present application;

[0027] Figure 15 is the schematic structural view of the reinforcing part in the embodiment of the present application;

[0028] Figure 16 is Figure 15 the enlarged schematic view of part D in

[0029] Figure 17 is Figure 15 the enlarged schematic view of part E in

[0030] Figure 18 is the schematic structural view of the battery pack in the embodiment of the present application;

[0031] Figure 19 is the explosion schematic view of the battery pack in the embodiment of the present application.

[0032] Reference numerals: 100 - sampling assembly, 1 - flexible circuit board, 10 - body, 11 - first side, 12 - reinforcing part, 13 - conductive circuit, 20 - reinforcing plate, 21 - second side, 22 - third side, 23 - retracted edge, 231 - inflection point, 232 - first retracted edge, 233 - second retracted edge, 24 - first reinforcing plate, 241 - first edge, 25 - second reinforcing plate, 251 - second edge, 252 - third edge, 253 - weight reduction part, 2531 - weight reduction hole, 2532 - weight reduction groove, 254 - bonding part, 2 - connector, 1000 - battery pack, 200 - box body, 2001 - cross beam, 300 - battery, x - first direction, y - second direction, z - third direction. Detailed implementation manners

[0033] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0034] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship 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.

[0036] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0037] In order to ensure the safe and efficient operation of the battery system, a sampling component is provided in the battery pack to collect signals such as the voltage, current, and temperature of the battery cells in the battery pack. The sampling component includes a flexible circuit board and a connector connected to each other. Among them, various signals are collected through the flexible circuit board, and the flexible circuit board then transmits the collected signals to the connector.

[0038] In the related art, a reinforcement is provided at the position where the flexible circuit board is connected to the connector to enhance the structural strength of this position. However, stress concentration is likely to occur at the position where the reinforcement is provided on this flexible circuit board, resulting in tearing of the circuit board and affecting the structural stability and sampling reliability.

[0039] The embodiment of the present application provides a sampling component. According to the sampling component provided by the present application, the risk of tearing of the body due to stress concentration can be reduced, and the reliability of the sampling component can be improved.

[0040] The sampling component provided by the embodiment of the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. Among them, the sampling component in the embodiment of the present application has a first direction x, a second direction y, and a third direction z that intersect pairwise. As shown in the accompanying drawings of the sampling component, the first direction x is the length direction of the sampling component, the second direction y is the width direction of the sampling component, and the third direction z is the thickness direction of the sampling component.

[0041] As Figures 5 to 8 shown, the sampling component 100 provided by the embodiment of the present application may specifically include: a body 10 and a reinforcing plate 20. The body 10 includes two ends disposed away from each other along the first direction x. The reinforcing plate 20 is connected to at least one end of the body 10, and the reinforcing plate 20 and the body 10 are stacked along the third direction; wherein, both sides of the body 10 along the second direction y have a first side 11. The reinforcing plate 20 has a second side 21. The second side 21 is disposed on one side close to the center of the body 10 along the first direction x. The second side 21 is located between the first sides 11 on both sides of the body 10, and the second side 21 is spaced from the first side 11. In this way, when the body 10 is bent, the second side 21 of the reinforcing plate 20 is not likely to generate a shearing force on the body 10, thereby reducing the stress concentration generated by the body 10.

[0042] The sampling component 100 generally includes a sampling circuit and a connector 2. In the embodiment of the present application, the sampling circuit is a flexible printed circuit board 1 (Flexible Printed Circuit, FPC). The flexible printed circuit board 1 includes a body 10 and a reinforcing plate 20. The connector 2 is connected to the reinforcing plate 20 at the end of the flexible printed circuit board 1. Specifically, a plurality of sampling terminals are arranged along the length direction of the flexible printed circuit board 1. The sampling terminals can be connected to the battery cells to collect various information of the battery cells, and obtain the health status and performance of the battery 300. In the embodiment of the present application, the reinforcing plate 20 is arranged at at least one end of the body 10. The connector 2 of the sampling component 100 is connected to the reinforcing plate 20. Correspondingly, the side edge of the reinforcing plate 20 close to the center of the body 10 along the first direction x is the second side edge 21. Among them, the reinforcing plate 20 is a plate-like structure with a certain area and thickness. The reinforcing plate 20 is connected to the body 10 and is used to provide strength compensation for the body 10. It should be noted that the base material of the flexible printed circuit board 1 usually adopts polyimide (PI) or polyester (PET) materials. The quality and thickness of the materials will have a certain impact on the structural strength of the body 10. In addition, when the sampling circuit is assembled with the battery pack 1000, in order to adapt to the assembly conditions, the body 10 will also be bent to a certain extent. If the body 10 is subjected to a large shear force at the bending position, it is easy to be torn. Generally, the body 10 will be bent to different degrees along the length direction, and the tearing position is likely to occur on the long side. In the embodiment of the present application, the first side edge 11 of the body 10 is the long side, and the second side edge 21 of the reinforcing plate 20 is located between the first side edges 11 of the body 10, so that there is a gap between the end of the second side edge 21 and the first side edge 11. In this way, when the first side edge 11 of the body 10 is bent, the second side edge 21 of the reinforcing plate 20 can be prevented from generating a shear force on the first side edge 11 of the body 10.

[0043] Optionally, third side edges 22 are further provided on both sides of the reinforcing plate 20 along the second direction y. The third side edges 22 are exposed outside the body 10 along the second direction y. The reinforcing plate 20 further has a retracted edge 23. The retracted edge 23 is arranged between the second side edge 21 and the third side edge 22. The retracted edge 23 is at least partially located on the body 10. The second side edge 21 and the third side edge 22 are connected by the retracted edge 23. The third side edge 22 can play a role in strengthening the structure of the edge of the body 10, and the arrangement of the retracted edge 23 connects the second side edge 21 and the third side edge 22.

[0044] It should be noted that, in the embodiment of the present application, since the reinforcing plate 20 is disposed at one end of the body 10, the reinforcing plate 20 can cover the end of the body 10, wherein the reinforcing plate 20 has a second side 21 close to the center of the body 10, and a fourth side that is opposite to the second side 21 along the first direction x and away from the center of the body 10, wherein the inner shrinkage edge 23 is disposed between the second side 21 and the third side 22. Since the third side 22 is exposed to the body 10, the portion of the reinforcing plate 20 exposed to the body 10 can be used to open a mounting hole for connecting the sampling assembly 100 as a whole with the box 200 of the battery pack 1000, and the portion of the reinforcing plate 20 exposed to the body 10 can also provide better protection for the first side 11 of the body 10, preventing the edge of the first side 11 of the body 10 from being damaged by external forces.

[0045] Optionally, the inner shrink edge 23 is a curved segment, and two ends of the inner shrink edge 23 respectively transition to the second side edge 21 and the third side edge 22 in an arc shape.

[0046] Specifically, along the second direction y, the second side 21 is retracted into the first side 11, and the third side 22 is exposed from the first side 11. Since the two ends of the retracted edge 23 are respectively connected to the second side 21 and the third side 22, the retracted edge 23 and the first side 11 are actually in a staggered stacking position relationship, that is, the retracted edge 23 passes through the first side 11 along the length direction. Since the third side 22 is exposed from the body 10 along the second direction y, that is, the body 10 is located between the third side 22 of the reinforcing plate 20,

[0047] like Figure 6 As shown, the inner shrink edge 23 includes a first inner shrink edge 232 and a second inner shrink edge 233 connected in sequence, the first inner shrink edge 232 is connected to the second side edge 21, the second inner shrink edge 233 is connected to the third side edge 22, and there is an inflection point 231 between the first inner shrink edge 232 and the second inner shrink edge 233, wherein there is a first spacing W1 between the inflection point 231 and the first side edge 11, and there is a second spacing W2 between the inflection point 231 and the second side edge 21, satisfying: W1>0.5mm, W2>3mm.

[0048] In the embodiment of the present application, the first inwardly contracted edge 232 is contracted from the third side 22 toward the center of the reinforcing plate 20, and after passing the inflection point 231, the second inwardly contracted edge 233 extends to smoothly transition with the second side 21. The setting of the first inwardly contracted edge 232 and the second inwardly contracted edge 233 allows a smooth transition between the second side 21 and the third side 22, avoiding the risk of sharp corners at the edges that increase stress concentration in the main body 10.

[0049] Optionally, a preset angle α is formed between the third side edge 22 and the first side edge 11, and the preset angle α satisfies: α>90 °, under this obtuse - angle design, the angle between the reinforcing plate 20 and the main body 10 will not form a shape similar to a "hook", thus avoiding the sampling component 100 from catching other objects during processing and transportation, generating a pulling force that may cause the main body 10 to be torn.

[0050] Specifically, as Figure 6 shown, since the third side 22 of the reinforcing plate 20 is exposed outside the main body 10, an angle will be formed between the third side 22 of the reinforcing plate 20 and the first side 11 of the main body 10. During actual processing and transportation, due to the complexity of the operating environment, if this angle is less than 90°, a shape similar to a "hook" will be formed between the third side 22 and the first side 11. This makes it easy for the sampling component 100 to catch other objects such as processing equipment at this angle. When the sampling component 100 and the caught object are pulled, a pulling force is likely to be generated at this angle, causing the first side 11 to be torn, thus affecting the structural integrity, structural strength of the main body 10, and even the normal operation of the sampling function. When the preset angle α between the third side 22 and the first side 11 is an obtuse angle, the obtuse angle is not likely to catch the contacted object when contacting the object, and it is not easy to generate a pulling force here, thereby reducing the probability and risk of the main body 10 being torn.

[0051] As Figures 15 to 17 shown, at least part of the reinforcing plate 20 is exposed outside the first side 11. The orthogonal projection of the reinforcing plate 20 on the main body 10 along the third direction z intersects with the first side 11; the main body 10 is also provided with a reinforcing portion 12. The reinforcing portion 12 is arranged on one side of the main body 10 close to the first side 11, and the reinforcing portion 12 passes through the intersection point of the reinforcing plate 20 and the first side 11. Among them, when the reinforcing plate 20 is exposed outside the first side 11, the reinforcing plate 20 can effectively share and resist the external impact force, and also enhances the anti - deformation ability of the main body 10 at the edge. In addition, mounting holes can be provided in the part of the reinforcing plate 20 exposed outside the first side 11. The mounting holes can be used to pass through fasteners to fix the reinforcing plate 20 and the main body 10 together to the box body 200 of the battery pack 1000, thus avoiding opening holes on the main body 10. This helps to ensure the structural integrity of the main body 10, improve the structural strength, and also avoid the influence of opening holes on the main body 10 on the circuit layout.

[0052] It can be understood that when at least part of the reinforcing plate 20 is exposed outside the first side 11, the projection of the reinforcing plate 20 on the main body 10 will pass through the first side 11 and intersect with the first side 11 to form an intersection point. Since the reinforcing plate 20 has a relatively large rigidity, while the main body 10 is a flexible structure with relatively small rigidity, there will be more obvious stress concentration at this intersection point of the main body 10, increasing the risk of tearing. In the embodiment of the present application, by providing the reinforcing portion 12 at this position, the structural strength and rigidity of the main body 10 at this position are enhanced, thereby reducing the risk of the main body 10 being torn.

[0053] Optionally, a conductive circuit 13 is provided on the body 10. The material of the reinforcing portion 12 is the same as that of the conductive circuit 13, and the reinforcing portion 12 and the conductive circuit 13 are arranged at intervals.

[0054] Specifically, the body 10 may include a base material and a conductive circuit 13 connected to the base material. The conductive circuit 13 is generally made of copper foil, and the wire circuit can be processed and formed by electro-deposition or etching. In the embodiment of the present application, the reinforcing portion 12 is a reinforcing plate 20 copper formed by processing the edge of the copper foil and arranged at an insulating interval from the copper circuit. Since the reinforcing plate 20 copper is directly processed from the copper foil, the processing process is simple and the strength can also be guaranteed.

[0055] Optionally, the reinforcing portion 12 is arranged around the conductive circuit 13. Among them, the arrangement of the reinforcing portion 12 can not only play a role in strengthening the structural strength of the edge of the body 10, but also, since the reinforcing portion 12 and the conductive circuit 13 need to be insulated, an interval needs to be provided between the reinforcing portion 12 and the conductive circuit 13. In this way, the distance between the conductive circuit 13 and the edge of the body 10 is increased, and when the edge of the body 10 is subjected to an external force, it is not easy to cause a structural impact on the conductive circuit 13, thereby ensuring the reliability of the sampling assembly 100 for sampling the battery cell.

[0056] As Figure 8 、and Figures 11 to 14 shown, the reinforcing plate 20 includes a first reinforcing plate 24 and a second reinforcing plate 25. The first reinforcing plate 24 and the second reinforcing plate 25 are respectively arranged on both sides of the body 10 in a back-to-back manner. The first reinforcing plate 24 has a first edge 241 arranged close to the center of the body 10, and the second reinforcing plate 25 has a second edge 251 arranged close to the center of the body 10. The first edge 241 and the second edge 251 are arranged in a staggered manner along the first direction x.

[0057] Specifically, the first reinforcing plate 24 and the second reinforcing plate 25 are arranged on both sides of the body 10 along the third direction z, where the third direction z is the thickness direction of the body 10, so as to strengthen and protect the body 10 from both sides in the thickness direction of the body 10. Among them, the first edge 241 and the second edge 251 are arranged in a staggered manner along the first direction x, which means that one of the first edge 241 and the second edge 251 shrinks inward along the first direction x towards the center of the reinforcing plate 20. It should be noted that in practical applications, the reinforcing plate 20 can be used to connect with the box body 200 of the battery pack 1000, and the body 10 is connected with the battery 300 to collect information related to the battery 300. The height relationship between the reinforcing plate 20 and the body 10 is not unique. That is, after the sampling component 100 is assembled with the box body 200 of the battery pack 1000 and the battery 300, the height of the body 10 can be higher than the height of the reinforcing plate 20, can be lower than the height of the reinforcing plate 20, or the heights of the two can be the same. On this premise, the body 10 will be bent in different directions relative to the reinforcing plate 20. Among them, the specific staggering method of the first edge 241 and the second edge 251 is related to the bending direction of the body 10. Specifically, when the body 10 bends towards one side, the corresponding first edge 241 or second edge 251 of the reinforcing plate 20 on that side shrinks, so as to avoid the formation of shear force at the edge where the body 10 bends. In addition, it should be noted that the bending of the body 10 here refers to the bending during the processing and forming of the sampling component 100.

[0058] Exemplarily, in the first direction x, the distance between the first edge 241 and the center of the body 10 is D1, and the distance between the second edge 251 and the center of the body 10 is D2. In some alternative embodiments, the body 10 bends along the third direction z towards the first reinforcing plate 24 and satisfies: D1 > D2. In some other alternative embodiments, the body 10 bends along the third direction z towards the second reinforcing plate 25 and satisfies: D1 < D2, where the units of D1 and D2 are both mm.

[0059] Such as Figure 14As shown, the dotted line position on the body 10 is the center line of the body 10 along the first direction x. Among them, the distance between the first edge 241 of the first reinforcing plate 24 and this center line is D1, and the distance between the second edge 251 of the second reinforcing plate 25 and this center line is D2. The figure shows the positional relationship between the first reinforcing plate 24 and the second reinforcing plate 25 when the body 10 is bent towards the first reinforcing plate 24 along the third direction z. As shown in the figure, the distance D1 between the first edge 241 and this center line is greater than the distance D2 between the second edge 251 and this center line, that is, along the first direction x, the first reinforcing plate 24 is farther from the center line of the body 10 than the second reinforcing plate 25. It should be noted that when the body 10 is bent along the third direction z, if the body 10 contacts the first reinforcing plate 24 or the second reinforcing plate 25, a certain shear force will be generated at the contact position, and the existence of the shear force will cause the body 10 to tear. By flexibly misaligning the first edge 241 and the second edge 251 according to the bending direction of the body 10, it is possible to avoid the body 10 contacting the first edge 241 or the second edge 251 when bending towards the first reinforcing plate 24 or the second reinforcing plate 25, thereby avoiding the generation of shear force and preventing the body 10 from tearing.

[0060] As Figure 14 shown, the misalignment distance D between the first edge 241 and the second edge 251 satisfies: 0.3mm ≤ D ≤ 1.2mm. When the misalignment distance D between the first edge 241 and the second edge 251 is ≥ 0.3mm, it can be ensured that after the first reinforcing plate 24 and the second reinforcing plate 25 obtained by processing are assembled with the body 10, if the body 10 is bent, there will be a certain gap between it and one of the retracted edges, thereby preventing the body 10 from contacting this edge to generate shear force; and when the misalignment distance D between the first edge 241 and the second edge 251 is ≤ 1.2mm, while ensuring that the body 10 is not affected by the shear force of the edge of the reinforcing plate 20 during bending, the structural area and structural strength of the reinforcing plate 20 can be ensured as much as possible. At the same time, the connection area with the collector is also ensured, avoiding the impact of large-size shrinkage on the installation of the collector.

[0061] Optionally, the first reinforcing plate 24 is used to connect with the connector 2, and the second reinforcing plate 25 is provided with a weight reduction portion 253. The weight reduction portion 253 is arranged at the edge of the second reinforcing plate 25, and / or the weight reduction portion 253 is arranged in the middle area of the second reinforcing plate 25 far from the edge. The setting of the weight reduction portion 253 reduces the overall weight of the reinforcing plate 20 and the sampling assembly 100.

[0062] Specifically, the weight reduction portion 253 is arranged in the area of the second reinforcing plate 25 where there is no structural strength requirement, so as to reduce the overall weight of the sampling assembly 100 while ensuring the structural strength of the second reinforcing plate 25 and the protective effect of the second reinforcing plate 25 on the body 10, which helps to achieve the lightweight of the battery pack 1000.

[0063] In an embodiment of the present application, the second reinforcing plate 25 is provided with an adhesive portion 254, and the weight reduction portion 253 is spaced apart from the adhesive portion 254. The adhesive portion 254 is used to realize the connection between the second reinforcing plate 25 and the body 10. Exemplarily, as Figure 13 shown, two adhesive portions 254 are spaced apart at positions of the second reinforcing plate 25 away from the edge. In practical applications, the adhesive portion 254 can be formed by applying glue on the second reinforcing plate 25. Among them, there is a gap between the weight reduction portion 253 and the adhesive portion 254, that is, it is necessary to ensure that the adhesive portion 254 is surrounded by the second reinforcing plate 25, so that glue overflow can be avoided during glue application.

[0064] In an embodiment of the present application, as Figure 13 shown, the second reinforcing plate 25 includes a second edge 251 close to the center of the body 10 along the first direction x and a third edge 252 away from the center of the body 10. The weight reduction portion 253 is a weight reduction hole 2531 arranged along the first direction x close to the center of the body 10 and a weight reduction groove 2532 arranged away from the center of the body 10; wherein, the third edge 252 is concave inward along the first direction x towards the center of the body 10 to form the weight reduction groove 2532. The arrangement of the weight reduction hole 2531 and the weight reduction groove 2532 can reduce the weight of the second reinforcing plate 25, thereby reducing the weight of the entire sampling assembly 100, which contributes to the lightweight of the battery pack 1000.

[0065] Among them, the first reinforcing plate 24 is further provided with through holes arranged in an array at a position opposite to the weight reduction hole 2531 along the third direction z. The through holes can be used for the connectors 2 terminals to pass through to realize the electrical connection between the connectors 2 and the body 10.

[0066] Optionally, the minimum distance between the weight reduction hole 2531 and the second edge 251 is W3, satisfying: 1mm ≤ W3 ≤ 2.5mm. Exemplarily, the minimum distance W3 between the weight reduction hole 2531 and the second edge 251 can be set to 1mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, etc. Among them, by setting the minimum distance W3 between the weight reduction hole 2531 and the second edge 251, it can be ensured that the part of the second reinforcing plate 25 between the weight reduction hole 2531 and the second edge 251 does not break. It can be understood that while ensuring the structural strength of the second reinforcing plate 25, the reduction of the W3 size can increase the area of the weight reduction hole 2531, thereby enhancing the weight reduction effect on the second reinforcing plate 25.

[0067] Optionally, the maximum dimension of the weight reduction hole 2531 along the second direction y is L, and the distance between the weight reduction hole 2531 and the third edge 252 is W4, satisfying: 5mm ≤ W4 ≤ 10mm, and W4 > L / 5.

[0068] Specifically, along the first direction x, both sides of the weight-reducing hole 2531 are respectively spaced from the second edge 251 and the third edge 252 of the second reinforcing plate 25. Among them, the spacing between the weight-reducing hole 2531 and the second edge 251 only needs to ensure that the second reinforcing plate 25 does not break, while the distance between the weight-reducing hole 2531 and the third edge 252 needs to ensure that the second reinforcing plate 25 has a certain structural strength. As Figure 13 shown, the part of the second reinforcing plate 25 between the third edge 252 and the weight-reducing hole 2531 bears the main structural strength requirements. By designing the dimensions of this part, the overall rigidity and structural strength of the second reinforcing plate 25 can be ensured, thereby reducing the risk of deformation and warping of the second reinforcing plate 25.

[0069] As Figure 8 shown, the sampling assembly 100 further includes a connector 2. The reinforcing plate 20 includes a first reinforcing plate 24 and a second reinforcing plate 25. The first reinforcing plate 24 and the second reinforcing plate 25 are respectively disposed on both sides of the body 10 in a facing-away manner. The second reinforcing plate 25 is adapted to be connected to the box body 200 of the battery pack 1000. The connector 2 is connected to the first reinforcing plate 24. The body 10 is located between the first reinforcing plate 24 and the second reinforcing plate 25. The connector 2 is connected to the side of the first reinforcing plate 24 facing away from the body 10. The terminals of the connector 2 pass through the through holes provided on the first reinforcing plate 24 to be electrically connected to the body 10, so as to collect various information of the battery cells through the body 10.

[0070] In practical applications, as Figure 18 and Figure 19 shown, the sampling assembly 100 can be connected to the cross beam 2001 of the box body 200 of the battery pack 1000 through fasteners. Specifically, the first reinforcing plate 24 and the second reinforcing plate 25 are provided with mounting holes, and the fasteners sequentially pass through the mounting holes of the first reinforcing plate 24 and the second reinforcing plate 25 to connect the body 10, the connector 2, etc. to the cross beam 2001.

[0071] It should be noted that in the embodiment of the present application, the height of the battery cells is higher than the height of the cross beam 2001, and the end of the body 10 is connected to the cross beam 2001. Since the body 10 is disposed on the top of the battery cells in the length direction, the body 10 is bent toward the first reinforcing plate 24 along the third direction z at the edge of the reinforcing plate 20. In practical applications, the bending direction of the body 10 needs to be designed in combination with the position and size relationship between the box body 200 and the battery cells in the battery pack 1000.

[0072] In summary, the sampling assembly 100 provided by the embodiment of the present application has at least the following advantages:

[0073] In the embodiments of the present application, the reinforcing plate 20 is connected to at least one end of the body 10 along the first direction x. The setting of the reinforcing plate 20 plays the role of the reinforcing plate 20 for the body 10, ensuring the structural rigidity of the position where the flexible circuit board 1 is provided with the reinforcing plate 20 and not being easily deformed. Further, when an external force acts on the body 10, stress concentration is more likely to occur at the position where the second side 21 of the body 10 intersects with the reinforcing plate 20. In the embodiments of the present application, by setting the second side 21 of the reinforcing plate 20 to be located between the first sides 11 of the body 10, the end of the second side 21 can be arranged to avoid the first side 11, so that the first side 11 and the second side 21 with stress concentration are avoided, preventing the second side 21 of the reinforcing plate 20 from generating a shearing force on the first side 11 of the body 10, thereby reducing the risk of the body 10 being torn.

[0074] The present application also provides a battery pack 1000, including a box body 200, a battery 300, and the sampling assembly 100 in any one of the above; wherein, an accommodation cavity is provided in the box body 200, the battery 300 is arranged in the accommodation cavity, and the sampling assembly 100 is connected to the battery 300 to collect information of the battery 300.

[0075] It should be noted that the sampling assembly 100 in the embodiments of the present application has the same structure as the sampling assembly 100 in any one of the foregoing, and its beneficial effects are also similar, which will not be elaborated herein.

[0076] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example 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 embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A sampling component, including a first direction (x), a second direction (y), and a third direction (z) that intersect pairwise, characterized in that, Comprising: A body (10) and a reinforcing plate (20), the body (10) including two ends disposed away from each other along the first direction (x), the reinforcing plate (20) being connected to at least one end of the body (10), and the reinforcing plate (20) and the body (10) being stacked along the third direction (z); wherein, Both sides of the body (10) along the second direction (y) have first side edges (11), the reinforcing plate (20) has a second side edge (21), the second side edge (21) is disposed on one side close to the center of the body (10) along the first direction (x), the second side edge (21) is located between the first side edges (11) on both sides of the body (10), and the second side edge (21) is spaced from the first side edge (11).

2. The sampling component according to claim 1, wherein Both sides of the reinforcing plate (20) along the second direction (y) further have third side edges (22), and the third side edges (22) are exposed outside the body (10) along the second direction (y); The reinforcing plate (20) further has a retracted edge (23), the retracted edge (23) is disposed between the second side edge (21) and the third side edge (22), at least part of the retracted edge (23) is located on the body (10), and the second side edge (21) and the third side edge (22) are connected by the retracted edge (23).

3. The sampling component according to claim 2, wherein The retracted edge (23) is a curved segment, and both ends of the retracted edge (23) are arc-transitioned with the second side edge (21) and the third side edge (22) respectively.

4. The sampling component according to claim 3, wherein The retracted edge (23) includes a first retracted edge (232) and a second retracted edge (233) connected in sequence, the first retracted edge (232) is connected to the second side edge (21), the second retracted edge (233) is connected to the third side edge (22), and there is an inflection point (231) between the first retracted edge (232) and the second retracted edge (233), wherein, There is a first distance W1 between the inflection point (231) and the first side edge (11), and there is a second distance W2 between the inflection point (231) and the second side edge (21), satisfying: W1 > 0.5 mm, W2 > 3 mm.

5. The sampling component according to claim 2, characterized in that A preset included angle α is formed between the third side (22) and the first side (11), satisfying: α > 90 ° .

6. The sampling component according to claim 1, wherein A part of the reinforcing plate (20) is exposed outside the first side edge (11), and the orthographic projection of the reinforcing plate (20) on the body (10) along the third direction (z) intersects with the first side edge (11); The body (10) is further provided with a reinforcing portion (12), the reinforcing portion (12) is disposed on one side of the body (10) close to the first side edge (11), and the reinforcing portion (12) passes through the intersection point of the reinforcing plate (20) and the first side edge (11).

7. The sampling component according to claim 6, wherein A conductive circuit (13) is disposed on the body (10), the material of the reinforcing portion (12) is the same as that of the conductive circuit (13), and the reinforcing portion (12) is spaced from the conductive circuit (13).

8. The sampling component according to claim 7, wherein The reinforcing portion (12) is disposed around the conductive circuit (13).

9. The sampling component according to claim 1, wherein The reinforcing plate (20) includes a first reinforcing plate (24) and a second reinforcing plate (25). The first reinforcing plate (24) and the second reinforcing plate (25) are respectively disposed on both sides of the body (10) in a facing-away manner. The first reinforcing plate (24) has a first edge (241) disposed close to the center of the body (10), and the second reinforcing plate (25) has a second edge (251) disposed close to the center of the body (10). The first edge (241) and the second edge (251) are offset in the first direction (x).

10. The sampling component according to claim 9, characterized in that In the first direction (x), the distance between the first edge (241) and the center of the body (10) is D1, and the distance between the second edge (251) and the center of the body (10) is D2. The body (10) is bent towards the first reinforcing plate (24) in the third direction (z), and it satisfies: D1 > D2; or, The body (10) is bent towards the second reinforcing plate (25) in the third direction (z), and it satisfies: D1 < D2.

11. The sampling component according to claim 9, characterized in that, The offset distance between the first edge (241) and the second edge (251) is D, and it satisfies: 0.3 mm ≤ D ≤ 1.2 mm.

12. The sampling component according to claim 9, wherein The first reinforcing plate (24) is used for connecting with the connector (2), and the second reinforcing plate (25) is provided with a weight-reducing portion (253). ， The weight-reducing portion (253) is arranged at the edge of the second reinforcing plate (25), and / or the weight-reducing portion (253) is arranged in the middle area of the second reinforcing plate (25) away from the edge.

13. The sampling component according to claim 12, characterized in that, The second reinforcing plate (25) is provided with an adhesive portion (254), and the weight-reducing portion (253) and the adhesive portion (254) are spaced apart.

14. The sampling component according to claim 12, wherein The second reinforcing plate (25) further includes a third edge (252) away from the center of the body (10). The weight-reducing portion (253) includes a weight-reducing hole (2531) disposed close to the center of the body (10) in the first direction (x) and a weight-reducing groove (2532) disposed away from the center of the body (10); wherein, the third edge (252) is recessed towards the center of the body (10) in the first direction (x) to form the weight-reducing groove (2532).

15. The sampling component according to claim 14, characterized in that, The minimum distance between the weight-reducing hole (2531) and the second edge (251) is W3, and it satisfies: 1 mm ≤ W3 ≤ 2.5 mm.

16. The sampling component according to claim 14, wherein The maximum dimension of the weight-reducing hole (2531) in the second direction (y) is L, and the distance between the weight-reducing hole (2531) and the third edge (252) is W4, and it satisfies: 5 mm ≤ W4 ≤ 10 mm, and W4 > L / 5.

17. The sampling component according to claim 1, wherein The sampling assembly (100) further includes a connector (2). The reinforcing plate (20) includes a first reinforcing plate (24) and a second reinforcing plate (25). The first reinforcing plate (24) and the second reinforcing plate (25) are respectively disposed on both sides of the body (10) in a facing-away manner. The second reinforcing plate (25) is adapted to be connected to the box body (200) of the battery pack, and the connector (2) is connected to the first reinforcing plate (24).

18. A battery pack, characterized in that, It includes a box body (200), a battery (300), and the sampling assembly (100) according to any one of claims 1 to 17; wherein, A receiving cavity is provided inside the box body (200), the battery (300) is arranged in the receiving cavity, and the sampling assembly (100) is connected to the battery (300) to collect information of the battery (300).

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