Sampling assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a sampling assembly and a battery pack. The sampling assembly comprises a flexible circuit board, the flexible circuit board is provided with a groove part, the groove part penetrates through the flexible circuit board in the thickness direction of the flexible circuit board, and the groove part divides the flexible circuit board into a body part and a connecting part which are connected with each other; the body part comprises a retaining part and a bending part which are connected in a bending manner, the extending direction of the retaining part is intersected with the extending direction of the bending part, the bending part is overlapped with the retaining part, and at least one bending end point of the bending part is positioned on the edge, close to the body part, of the groove part. The sampling assembly can avoid some to-be-avoided mechanisms; and the wires extending into the flexible circuit board are prevented from being torn, so that the wires are prevented from being disconnected.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more specifically, to a sampling component and a battery pack. Background Technology

[0002] Currently, in battery packs, sampling components can be used to collect signals such as temperature and voltage of the battery pack to detect various aspects of the battery pack's performance; the flexible circuit board of the sampling component can be bent to adapt to various different usage environments.

[0003] However, when a flexible circuit board is bent, stress concentration is easily formed at the bend, which can cause the flexible circuit board to tear at the bend and lead to a break in the wires inside the flexible circuit board.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the aforementioned related technologies and to provide a sampling component and a battery pack.

[0006] According to one aspect of this disclosure, a sampling component is provided, comprising:

[0007] A flexible circuit board has a groove that penetrates the flexible circuit board in the thickness direction, dividing the flexible circuit board into a body portion and a connecting portion that are interconnected. The body portion includes a retaining portion and a bending portion that are bent and connected. The extending direction of the retaining portion intersects the extending direction of the bending portion, and the bending portion overlaps with the retaining portion. At least one bending endpoint of the bending portion is located near the edge of the groove portion close to the body portion.

[0008] The sampling component disclosed herein has several advantages. First, the extending direction of the retaining part intersects with the extending direction of the bending part, allowing the bending part to change the original extending direction of the flexible circuit board to form a clearance part. This clearance part can avoid some clearance mechanisms (e.g., hoisting structures on isolation beams, ensuring the realization of hoisting functions). Second, at least one bending endpoint of the bending part is located on the side edge of the groove near the main body, making the bending endpoint close to the bottom wall of the groove. Since there is a blank area without wires in the area near the bottom wall of the groove, even if the flexible circuit board is torn under stress, the tear location is generally located at the corner of the bottom wall of the groove, making it difficult for the tear to extend to the wires in the flexible circuit board, thus avoiding wire breakage. Third, after bending, the retaining part and the bending part will overlap, giving the main body a certain amount of room for movement and stretching, which can ensure that the main body will not be torn apart in the event of battery pack shaking or individual battery expansion.

[0009] According to another aspect of this disclosure, a battery pack is provided, comprising:

[0010] Battery pack;

[0011] The sampling component is the sampling component described above, which is used to sample the battery pack.

[0012] The battery pack disclosed herein has the following advantages: First, the extending direction of the retaining part intersects with the extending direction of the bending part, allowing the bending part to change the original extending direction of the flexible circuit board to form a clearance part. This clearance part can avoid some clearance mechanisms (e.g., lifting structures on isolation beams, ensuring the realization of the lifting function). Second, at least one bending endpoint of the bending part is located on the side edge of the groove near the main body, making the bending endpoint close to the bottom wall of the groove. Since there is a blank area without wires near the bottom wall of the groove, even if the flexible circuit board is torn under stress, the tear location is generally located at the corner of the bottom wall of the groove, making it difficult for the tear to extend to the wires in the flexible circuit board, avoiding wire breakage and ensuring the detection performance of the battery pack. Third, after bending, the retaining part and the bending part will overlap, giving the main body a certain amount of room for movement and stretching. This ensures that the main body will not be torn apart in the event of battery pack shaking or individual cell expansion, thereby ensuring the stability of the battery pack's detection performance.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0015] Figure 1 This is a schematic diagram of an example embodiment of the battery pack disclosed herein.

[0016] Figure 2 for Figure 1 A schematic diagram of the local structure of the part indicated by H in the sampling component.

[0017] Figure 3 for Figure 2 A schematic diagram of the flexible circuit board of the sampling component in the image when it is not bent.

[0018] Figure 4 for Figure 3 A schematic diagram showing the calculation of the minimum spacing between the first and second bend lines in the diagram.

[0019] Figure 5 for Figure 2 A three-dimensional structural diagram of the sampling component.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Flexible circuit board; 11. Groove; 12. Body; 121. Holding part; 121a. First holding part; 121b. Second holding part; 121c. Third holding part; 122. Bending part; 122a. First bending part; 122b. Second bending part; 123. Transition connection part; 13. Connecting part; 14. Weak part; 15. Conductor;

[0022] 2. Support components;

[0023] 3. Protective components;

[0024] A, bend end point; L, bend line; L1, first bend line; L2, second bend line; L3, third bend line; L4, fourth bend line; Z, axis of symmetry;

[0025] 10. Sampling component; 20. Battery pack;

[0026] 30. Battery box; 301. First side frame; 302. Second side frame;

[0027] 40. Isolation beam; 50. Conductive busbar; 60. Sampling terminal;

[0028] X, the first direction; Y, the second direction. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0030] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0031] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0032] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] This disclosure provides an exemplary embodiment of a sampling component 10, with reference to... Figures 1-5As shown, the sampling component 10 may include a flexible circuit board 1, on which a groove 11 is provided. The groove 11 penetrates the flexible circuit board 1 in the thickness direction and divides the flexible circuit board 1 into a body part 12 and a connecting part 13 that are connected to each other. The body part 12 includes a retaining part 121 and a bending part 122 that are bent and connected. The extending direction of the retaining part 121 intersects the extending direction of the bending part 122, and the bending part 122 overlaps with the retaining part 121. At least one bending endpoint A of the bending part 122 is located near the edge of the groove 11 near the body part 12.

[0034] Based on the same inventive concept, the present disclosure provides a battery pack, which may include a battery pack 20 and a sampling component 10; the sampling component 10 is any of the following sampling components 10, and the sampling component 10 is used to sample the battery pack 20.

[0035] The sampling component 10 and battery pack disclosed herein, on the one hand, have an extension direction of the holding part 121 intersecting with the extension direction of the bending part 122, so that the bending part 122 can change the original extension direction of the flexible circuit board 1 to form a clearance part. This clearance part can avoid some clearance mechanisms (e.g., the hoisting structure on the isolation beam 40, ensuring the realization of the hoisting function), or change the extension direction of the flexible circuit board 1 to meet the requirement that the flexible circuit board 1 covers each sampling area; on the other hand, at least one bending endpoint A of the bending part is located on the side edge of the groove 11 near the body part 12, so that the bending endpoint A is close to the groove. The bottom wall of the slot 11 has a blank area without wires near the bottom wall of the slot. Even if the flexible circuit board 1 is torn under force, the tear is generally located at the corner of the bottom wall of the slot. The tear is less likely to extend to the wires in the flexible circuit board 1, thus avoiding wire breakage and ensuring the detection performance of the battery pack. On the other hand, after bending, the retaining part 121 and the bending part 122 will overlap, so that the main body 12 will have a certain amount of room for movement and stretching. This can ensure that the main body 12 will not be torn off in the event of battery pack shaking or individual cell expansion, thereby ensuring the stability of the detection performance of the battery pack.

[0036] In some exemplary embodiments of this disclosure, reference is made to Figure 1As shown, the battery pack may include a battery case 30, which can be configured as a cuboid structure; therefore, the battery case 30 can also be configured as a cuboid structure. Specifically, the battery case 30 may include a base plate, a protective cover (not shown in the figure), two first side frames 301, and two second side frames 302. The base plate and the protective cover can be rectangular. Two first side frames 301 and two second side frames 302 are provided around the base plate, connected end-to-end to form a rectangular frame. The first side frames 301 extend along a first direction X, and the second side frames 302 extend along a second direction Y. A protective cover is provided on the opposite side of the two first side frames 301 and two second side frames 302 from the base plate, such that the protective cover is positioned opposite the base plate. The two first side frames 301 and two second side frames 302 are connected between the protective cover and the base plate. The base plate, the protective cover, the two first side frames 301, and the two second side frames 302 surround and form the receiving cavity of the battery case 30.

[0037] Of course, in other exemplary embodiments of this disclosure, the base plate and protective cover can be circular, elliptical, trapezoidal, etc., and the side frame can be one or more, forming a circular, elliptical, trapezoidal, etc., shape, so that the battery box 30 is formed as a cylinder, elliptical cylinder, prism, etc. The battery box 30 body can also be other shapes, which will not be described in detail here. Moreover, the battery box 30 may not include a protective cover. For example, in the case of multiple battery devices stacked vertically, the battery device located at the bottom may not have a protective cover, and only the battery device located at the top has a protective cover. The base plate of the upper battery device can serve as the protective cover for the lower battery device.

[0038] In some exemplary embodiments of this disclosure, a lifting structure can be provided on the first side frame 301 to install the battery pack on the electrical equipment. Alternatively, a lifting structure can be provided on the second side frame 302, or on both the first and second side frames 301.

[0039] Reference Figure 1As shown, the battery may also include a separator beam 40, which is disposed within the battery box 30. One separator beam 40 can divide the housing of the battery box 30 into two housing spaces; two intersecting separator beams 40 can divide the housing into four housing spaces; two substantially parallel separator beams 40 can divide the housing into three housing spaces. The number and arrangement of the separator beams 40 can also be other methods, which will not be elaborated here. The two ends of the separator beam 40 can be connected to the first side frame 301 and / or the second side frame 302, or alternatively, can be fixedly connected to the bottom plate of the battery box 30, thereby further improving the stability and robustness of the battery pack, and enhancing the overall pack modal strength and impact resistance.

[0040] The battery pack may also include a battery array 20, which is disposed within various accommodating spaces. The battery array 20 may include multiple individual cells, which may be arranged sequentially along a first direction X. Individual cells may be shaped like cuboids. Of course, in other exemplary embodiments of this disclosure, individual cells may also be configured as cylinders, prisms, frustums, truncated cones, etc., as needed, which will not be elaborated upon here.

[0041] The battery pack may also include a conductive busbar 50, which connects the battery terminals of individual cells. Individual cells in two battery packs 20 arranged in a row along the first direction X in two housing spaces can be connected in series or in parallel through the conductive busbar 50. Therefore, the conductive busbar 50 needs to cross the isolation beam 40.

[0042] In some exemplary embodiments of this disclosure, a lifting structure may also be provided on the isolation beam 40 to mount the battery pack onto the electrical equipment. Increasing the number of lifting points can enhance the stability of the battery pack installation.

[0043] In this case, a clearance structure can be provided on the conductive busbar 50. The clearance structure can be a through hole or a notch on the conductive busbar 50, or a portion of the conductive busbar 50 can be configured into a "U" shape to form the clearance structure. The clearance structure is positioned opposite to the hoisting structure on the isolation beam 40 to avoid the hoisting structure and ensure the realization of the hoisting function.

[0044] Reference Figure 1 As shown, the battery pack may also include a sampling component 10, which can collect voltage signals, temperature signals, etc., of two battery packs 20 arranged in a row along the first direction X within two accommodating spaces. Therefore, the sampling component 10 needs to cross the isolation beam 40. The sampling component 10 also needs to avoid the location of the hoisting structure of the isolation beam 40 to ensure the hoisting function is realized.

[0045] Specifically, refer to Figures 1-3 As shown, the sampling assembly 10 may include a flexible circuit board 1, which spans the isolation beam 40. The flexible circuit board 1 has multiple slots 11 extending through it in the thickness direction, meaning the slots 11 penetrate both surfaces of the flexible circuit board 1, near and away from the battery pack 20. The slots 11 also form openings on one side of the flexible circuit board 1, with the other end extending into the flexible circuit board 1 forming the bottom wall of the slot. This allows the slots 11 to divide the flexible circuit board 1 into interconnected body portions 12 and connecting portions 13. The connecting portions 13 can be used to connect to sampling terminals 60; specifically, one end of the connecting portion 13 is used to connect to the sampling terminal 60, and the other end is used to connect to the body portion 12.

[0046] The sampling terminal 60 can be a nickel sheet. The other end of the sampling terminal 60 is fixedly connected to the conductive bus 50. Voltage signals can be transmitted to the flexible circuit board 1 through the sampling terminal 60.

[0047] The connecting part 13 can be configured as a curved structure, so that the connecting part 13 has a certain degree of extensibility. On the one hand, in the case of installation error of the flexible circuit board 1, it can ensure that the sampling terminal 60 can be connected to the conductive bus 50; on the other hand, in the process of use, if the flexible circuit board 1 is displaced, it will not exert a pulling force on the sampling terminal 60, thus ensuring the connection effect between the sampling terminal 60 and the conductive bus 50.

[0048] In some exemplary embodiments of this disclosure, a weak portion 14 may be connected between two opposing groove walls of the groove portion 11, that is, the weak portion 14 is connected to the connecting portion 13 and the body portion 12. The weak portion 14 has low strength and is prone to breakage when subjected to external force, so that the connecting portion 13 can move relative to the body portion 12, thereby allowing the sampling terminal 60 to move relative to the body portion 12 to accommodate the expansion displacement of the battery cell.

[0049] By using the weak part 14 to connect the two opposite groove walls of the groove 11, it is easier to position the connecting part 13 and the sampling terminal 60 during assembly, thereby improving the accuracy of the connection between the connecting part 13 and the sampling terminal 60.

[0050] It should be noted that the weak part 14 does not serve as the bottom wall of the groove part 11.

[0051] The main body 12 may include a retaining portion 121 and a bent portion 122, which are formed by bending the main body 12 and are connected to each other. The extending direction of the retaining portion 121 intersects the extending direction of the bent portion 122, so that the bent portion 122 can change the original extending direction of the flexible circuit board 1 to form a clearance portion. This clearance portion can avoid the lifting structure on the isolation beam 40, ensuring the realization of the lifting function.

[0052] The bending endpoint A of the flexible circuit board 1 is a stress concentration point. Under stress, the flexible circuit board 1 is prone to tearing at the bending endpoint A. If the tear extends to the conductor 15 inside the flexible circuit board 1, it will cause the conductor 15 to break. Due to the regular wiring of the flexible circuit board 1, there is a blank area without conductor 15 near the bottom wall of the groove 11. At least one bending endpoint A of the bending portion is located on the edge of the groove 11 near the body portion 12, so that the bending endpoint A is close to the bottom wall of the groove 11. Even if the flexible circuit board 1 tears under stress, the tear is generally located at the corner of the bottom wall of the groove, and the tear is less likely to extend to the conductor 15 inside the flexible circuit board 1, thus avoiding the conductor 15 breaking.

[0053] In addition, the extending direction of the retaining part 121 intersects the extending direction of the bending part 122, so that the retaining part 121 and the bending part 122 overlap, so that the main body part 12 has a certain amount of room for stretching and movement, which can ensure that the main body part 12 will not be torn off in the event of battery pack shaking or individual battery expansion.

[0054] It should be noted that the flexible circuit board 1 extends along the first direction X, and the extension direction of the retaining part 121 is also the first direction X.

[0055] Optionally, the distance between the bending end point A and the bottom wall of the groove 11 is a first distance S1, which is greater than or equal to 10 mm and less than or equal to 50 mm. For example, the first distance S1 can be 12 mm, 15 mm, 17 mm, 20 mm, 23 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, 37 mm, 40 mm, 43 mm, 45 mm, 47 mm, etc.

[0056] If the first distance S1 is too small, the bending end point A is too close to the bottom wall of the groove 11, and the stress is likely to be too concentrated on the bottom wall of the groove, which may tear the body 12 and the connecting part 13.

[0057] If the first distance S1 is too large, it cannot be guaranteed that the part that will be torn first after being subjected to force is the bottom wall of the groove 11, or that tearing will easily occur at the bending end A. The tear can easily extend to the wire 15 in the flexible circuit board 1, which will cause the wire 15 to break.

[0058] The above-mentioned numerical range not only avoids excessive stress concentration on the bottom wall of the groove, which could lead to tearing between the main body 12 and the connecting part 13, but also ensures that the first part to tear after being subjected to force is the bottom wall of the groove 11, and that tearing will not easily occur at the bending end point A.

[0059] Alternatively, the groove 11 may include a first groove segment and a second groove segment connected in sequence, wherein the extension direction of the first groove segment intersects the extension direction of the second groove segment, for example, the extension direction of the first groove segment is perpendicular to the extension direction of the second groove segment, such that the groove 11 is configured as an "L" shape. The first groove segment extends to the edge of the flexible circuit board 1, forming the groove opening of the groove 11; the second groove segment is located inside the flexible circuit board 1, and the end of the second groove segment away from the first groove segment is the bottom wall of the groove.

[0060] Of course, in some other exemplary embodiments of this disclosure, the groove 11 may be configured as an inclined structure, or the groove 11 may be configured as other curved structures, which will not be described in detail here.

[0061] Optionally, refer to Figure 3 As shown, the edge line connecting the holding part 121 and the bending part 122 is the bending line L. The angle α between the bending line L and the extension direction of the holding part 121 is greater than or equal to 30° and less than or equal to 60°. For example, the angle α between the bending line L and the extension direction of the holding part 121 can be 32°, 35°, 37°, 40°, 43°, 45°, 48°, 50°, 52°, 55°, 57°, etc.

[0062] If the angle α between the bending line L and the extension direction of the holding part 121 is too large, causing the bending part 122 to bend too much toward the holding part 121, which is basically opposite to the extension direction of the flexible circuit board 1, a longer flexible circuit board 1 is required.

[0063] If the angle α between the bending line L and the extending direction of the holding part 121 is too small, the length of the bending line L will be too long, and the length of the bending part 122 will also be too long, making it difficult to achieve the folding process.

[0064] The above-mentioned numerical range not only prevents the bending portion 122 from bending towards the holding portion 121, eliminating the need for a longer flexible circuit board 1, but also prevents the bending line L from being too long, making the folding process easier to implement.

[0065] In some exemplary embodiments of this disclosure, reference is made to Figure 2 and Figure 3As shown, at least two retaining portions 121 are provided. For example, there may be two retaining portions 121, or there may be three or more retaining portions 121. The at least two retaining portions 121 include a first retaining portion 121a and a second retaining portion 121b. That is, when there are two retaining portions 121, the two retaining portions 121 are the first retaining portion 121a and the second retaining portion 121b. The bending portion 122 is bent and connected between the first retaining portion 121a and the second retaining portion 121b. That is, the first retaining portion 121a, the bending portion 122, and the second retaining portion 121b are bent and connected in sequence. The bending portion 122 and the second retaining portion 121b are formed by bending the body portion 12.

[0066] The edge line connecting the first holding part 121a and the bending part 122 is the first bending line L1, and the edge line connecting the second holding part 121b and the bending part 122 is the second bending line L2. The second bending line L2 is parallel to the first bending line L1. This arrangement makes the extending direction of the first holding part 121a parallel to the extending direction of the second holding part 121b, so that a part of the flexible circuit board 1 can be moved in parallel without changing the extending direction of the flexible circuit board 1.

[0067] In some exemplary embodiments of this disclosure, reference is made to Figure 2 and Figure 3 As shown, at least two retaining portions 121 may further include a third retaining portion 121c. For example, when there are three retaining portions 121, the three retaining portions 121 are a first retaining portion 121a, a second retaining portion 121b, and a third retaining portion 121c. There may be two bending portions 122, namely a first bending portion 122a and a second bending portion 122b. The bending portion 122 connecting the first retaining portion 121a and the second retaining portion 121b is the first bending portion 122a. The specific relationship between the first retaining portion 121a, the second retaining portion 121b, and the bending portion 122 has been explained above, therefore, it will not be repeated here.

[0068] The second bent portion 122b is bent and connected between the third holding portion 121c and the second holding portion 121b. That is, the second holding portion 121b, the second bent portion 122b and the third holding portion 121c are bent and connected in sequence. The second bent portion 122b and the third holding portion 121c are formed by bending the main body portion 12.

[0069] The edge line connecting the second holding part 121b and the second bending part 122b is the third bending line L3, and the edge line connecting the third holding part 121c and the second bending part 122b is the fourth bending line L4. The third bending line L3 and the fourth bending line L4 are parallel. This arrangement makes the extending direction of the third holding part 121c parallel to the extending direction of the second holding part 121b. Combined with the first holding part 121a, the extending directions of the first holding part 121a, the second holding part 121b, and the third holding part 121c are all parallel. This allows a portion of the flexible circuit board 1 (e.g., the second holding part 121b) to move parallel without changing the extending direction of the flexible circuit board 1, thus forming a clearance part.

[0070] Optionally, refer to Figure 2 and Figure 3 As shown, the distance between the first bending line L1 and the second bending line L2 is equal to the distance between the third bending line L3 and the fourth bending line L4. This arrangement makes the translation distance of the second holding part 121b relative to the first holding part 121a the same as the translation distance of the third holding part 121c relative to the second holding part 121b.

[0071] The first bending line L1 and the fourth bending line L4 are symmetrically arranged, and the second bending line L2 and the third bending line L3 are symmetrically arranged. The axis of symmetry Z is the central axis of the second holding part 121b, and the central axis is perpendicular to the extension direction of the second holding part 121b. That is, the axis of symmetry Z is perpendicular to the first direction X and parallel to the second direction Y. This arrangement makes the translation direction of the second holding part 121b relative to the first holding part 121a opposite to the translation direction of the third holding part 121c relative to the second holding part 121b. Thus, the first bending part 122a, the second holding part 121b, and the third bending part 122b are connected to form an approximately "U"-shaped structure, which can avoid the hoisting structure and ensure the realization of the hoisting function. Moreover, the two side edges of the third holding part 121c are basically corresponding to the two side edges of the first holding part 121a on two straight lines, so that the third holding part 121c is bent back to the original position of the flexible circuit board 1, avoiding the flexible circuit board 1 occupying a large width and affecting the arrangement of other components.

[0072] In some exemplary embodiments of this disclosure, reference is made to Figure 1 and Figure 2 As shown, the bent portion 122 may be provided on the side of the retaining portion 121 opposite to the battery pack 20.

[0073] Specifically, the first holding part 121a and the second holding part 121b are located on the same side of the first bending part 122a. Specifically, the first bending part 122a is located on the side of the first holding part 121a and the second holding part 121b away from the battery pack 20. With this arrangement, the first bending part 122a can limit the first holding part 121a and the second holding part 121b to a certain extent, so as to avoid the first holding part 121a, the first bending part 122a and the second holding part 121b being folded in sequence to form a spring-like structure, which would easily generate a rebound force, resulting in a pulling force on the connecting part 13 and affecting the connection between the connecting part 13 and the sampling terminal 60.

[0074] The second holding portion 121b and the third holding portion 121c are located on the same side of the second bending portion 122b. Specifically, the second bending portion 122b is located on the side of the second holding portion 121b and the third holding portion 121c that is away from the battery pack 20. With this arrangement, the second bending portion 122b can limit the third holding portion 121c and the second holding portion 121b to a certain extent, so as to avoid the second holding portion 121b, the second bending portion 122b and the third holding portion 121c being folded in sequence to form a spring-like structure, which would easily generate a rebound force, resulting in a pulling force on the connecting portion 13 and affecting the connection between the connecting portion 13 and the sampling terminal 60.

[0075] Of course, in some other exemplary embodiments of this disclosure, the first holding portion 121a and the second holding portion 121b may be provided on opposite sides of the first bending portion 122a, that is, the first holding portion 121a, the first bending portion 122a, and the second holding portion 121b may be folded in sequence; or the second holding portion 121b and the third holding portion 121c may be provided on opposite sides of the second bending portion 122b, that is, the second holding portion 121b, the second bending portion 122b, and the third holding portion 121c may be folded in sequence.

[0076] Optionally, the first holding portion 121a and the second holding portion 121b do not overlap, and the second holding portion 121b and the third holding portion 121c do not overlap. Specifically, the first bending portion 122a overlaps with the first holding portion 121a, and the first bending portion 122a overlaps with the second holding portion 121b, but the first holding portion 121a and the second holding portion 121b do not overlap; the second bending portion 122b overlaps with the third holding portion 121c, and the second bending portion 122b overlaps with the second holding portion 121b, but the second holding portion 121b and the third holding portion 121c do not overlap; this ensures that the flexible circuit board 1 has a maximum thickness of two layers at the fold, and no more than two layers, avoiding the flexible circuit board 1 becoming too thick after folding and affecting the overall thickness of the battery pack.

[0077] Reference Figure 4As shown, to ensure that the first holding part 121a and the second holding part 121b do not overlap, the distance K between the first bending line L1 and the second bending line L2 along the extending direction of the first holding part 121a needs to satisfy the following formula:

[0078]

[0079] In the formula, m is the width of the flexible circuit board 1, and α is the angle between the bending line L and the extension direction of the flexible circuit board 1, which is also the angle between the bending line L and the extension direction of the holding part 121.

[0080] Reference Figure 4 As shown, to ensure that the first holding part 121a and the second holding part 121b do not overlap, after bending, the first holding part 121a and the second holding part 121b each occupy a maximum of half of the first bent part 122a, that is, the second holding part 121b bends to the end of the first bending line L1, and the first holding part 121a bends to the end of the second bending line L2; therefore, we can obtain:

[0081]

[0082]

[0083] Thus, the formula for calculating the distance K between the first bending line L1 and the second bending line L2 along the extension direction of the first holding part 121a can be obtained.

[0084] Similarly, the second holding part 121b and the third holding part 121c do not overlap, and the distance between the third bending line L3 and the fourth bending line L4 along the extension direction of the first holding part 121a also needs to satisfy the above formula, which will not be elaborated here.

[0085] In some exemplary embodiments of this disclosure, reference is made to Figure 2 and Figure 5 As shown, the main body 12 may further include a transition connection 123, which connects the holding part 121 and the bending part 122. The transition connection 123 is curved into an arc shape. The transition connection 123 enables a smooth transition connection between the holding part 121 and the bending part 122, allowing the wires within the main body 12 to bend more smoothly. This avoids the wires within the main body 12 from forming sharp corners, which could lead to wire breakage, and also prevents the wires from piercing the insulation layer of the main body 12, which could lead to a short circuit.

[0086] Specifically, a transition connection 123 is connected between the first holding part 121a and the first bending part 122a, a transition connection 123 is also connected between the second holding part 121b and the first bending part 122a, a transition connection 123 is also connected between the second holding part 121b and the second bending part 122b, and a transition connection 123 is also connected between the third holding part 121c and the second bending part 122b.

[0087] Optionally, refer to Figure 5 As shown, the sampling component 10 may further include a support member 2, which is disposed between the holding portion 121 and the bending portion 122. That is, the holding portion 121, the support member 2, and the bending portion 122 are stacked sequentially. The support member 2 can support the bending portion 122 to maintain the bending curvature of the transition connection portion 123, preventing the transition connection portion 123 from being squeezed out when the flexible circuit board 1 is under pressure. Adhesive can be provided on both sides of the support member 2, and two layers of adhesive can be used to bond it between the holding portion 121 and the bending portion 122. Alternatively, adhesive can be provided only on one side of the support member 2, and one layer of adhesive can be used to bond it to either the holding portion 121 or the bending portion 122, preventing the support member 2 from coming off between the holding portion 121 and the bending portion 122.

[0088] In some exemplary embodiments of this disclosure, the groove 11 has a corner portion with a chamfer, which can be a rounded chamfer or an angled chamfer. This arrangement makes it less likely for stress concentration to occur at the corner of the groove 11, thus preventing the flexible circuit board 1 from being torn at the corner.

[0089] In some exemplary embodiments of this disclosure, reference is made to Figure 2 and Figure 5 As shown, the sampling component 10 may also include a protective member 3. The protective member 3 is located on the side of the bent portion 122 away from the holding portion 121. The protective member 3 can protect the bent portion 122 and prevent wear caused by the protective cover of the battery pack on the bent portion 122 after the battery pack is installed.

[0090] The terms "parallel" and "perpendicular" used in this application can mean not only perfectly parallel and perpendicular, but also have a certain margin of error; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, they are considered to be parallel; if the angle between the two is greater than or equal to 85° and less than or equal to 95°, they are considered to be perpendicular.

[0091] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A sampling component, characterized in that, include: A flexible circuit board has a groove that penetrates the flexible circuit board in the thickness direction, dividing the flexible circuit board into a body portion and a connecting portion that are interconnected. The body portion includes a retaining portion and a bending portion that are bent and connected. The extending direction of the retaining portion intersects the extending direction of the bending portion, and the bending portion overlaps with the retaining portion. At least one bending endpoint of the bending portion is located near the edge of the groove portion close to the body portion.

2. The sampling component according to claim 1, characterized in that, The distance between the bending end point and the bottom wall of the groove is the first distance, which is greater than or equal to 10mm and less than or equal to 50mm.

3. The sampling component according to claim 1, characterized in that, The edge line connecting the retaining part and the bending part is a bending line, and the angle between the bending line and the extending direction of the retaining part is greater than or equal to 30° and less than or equal to 60°.

4. The sampling component according to any one of claims 1 to 3, characterized in that, The retaining part is configured as at least two, and the at least two retaining parts include a first retaining part and a second retaining part. The bending part is bent and connected between the first retaining part and the second retaining part. The edge line connecting the first retaining part and the bending part is a first bending line, and the edge line connecting the second retaining part and the bending part is a second bending line. The second bending line is parallel to the first bending line, so that the extension direction of the first retaining part is parallel to the extension direction of the second retaining part.

5. The sampling component according to claim 4, characterized in that, At least two of the retaining portions further include a third retaining portion. The bending portion is configured as two, namely a first bending portion and a second bending portion. The bending portion connecting the first retaining portion and the second retaining portion is the first bending portion. The second bending portion is bent and connected between the third retaining portion and the second retaining portion. The edge line connecting the second retaining portion and the second bending portion is the third bending line. The edge line connecting the third retaining portion and the second bending portion is the fourth bending line. The third bending line and the fourth bending line are parallel, so that the extending direction of the third retaining portion is parallel to the extending direction of the second retaining portion.

6. The sampling component according to claim 5, characterized in that, The distance between the first bending line and the second bending line is equal to the distance between the third bending line and the fourth bending line. The first bending line and the fourth bending line are symmetrically arranged, and the second bending line and the third bending line are symmetrically arranged. The axis of symmetry is the central axis of the second holding part, and the central axis is perpendicular to the extension direction of the second holding part.

7. The sampling component according to claim 5, characterized in that, The first holding portion and the second holding portion are located on the same side of the first bending portion, and the second holding portion and the third holding portion are located on the same side of the second bending portion; or, the first holding portion and the second holding portion are located on opposite sides of the first bending portion, and the second holding portion and the third holding portion are located on opposite sides of the second bending portion.

8. The sampling component according to claim 5, characterized in that, The first holding part does not overlap with the second holding part, and the second holding part does not overlap with the third holding part.

9. The sampling component according to any one of claims 1 to 3, characterized in that, The main body also includes a transition connection portion, which is connected between the retaining portion and the bending portion, and the transition connection portion is bent into an arc shape.

10. The sampling component according to claim 9, characterized in that, The sampling component also includes: A support member is disposed between the retaining portion and the bending portion.

11. The sampling component according to any one of claims 1 to 3, characterized in that, The groove has a corner portion, and the corner portion is chamfered.

12. The sampling component according to any one of claims 1 to 3, characterized in that, The sampling component also includes: A protective component is provided on the side of the bent portion away from the retaining portion.

13. A battery pack, characterized in that, include: Battery pack; The sampling component is the sampling component according to any one of claims 1 to 12, and the sampling component is used to sample the battery pack.

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