Flexible circuit board and battery pack

Abstract

The utility model discloses a flexible circuit board and a battery pack, the flexible circuit board comprises a main body part and a plurality of extension parts, and each extension part has an extension direction, a thickness direction and a width direction; in the direction parallel to the extending direction, one end of the extending part is connected with the main body part, and the other end of the extending part is used for being connected with a sampling part; at least one side of the extension part in the width direction is provided with a notch, so that the extension part can deform; the notch comprises an edge, and the edge is an arc-shaped edge, or the edge is a linear edge which is not parallel to the width direction of the extending part. The battery pack comprises a flexible circuit board. According to the utility model, the problem that the safety performance of the battery pack is influenced because the connection stability of the flexible circuit board at the sampling part is poor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a flexible circuit board and a battery pack. Background Art

[0002] A battery pack for new energy vehicles or energy storage contains a battery pack. In the prior art, a strip-shaped flexible circuit board is used to collect information of batteries in the battery pack for monitoring and managing the batteries. The flexible circuit board is fixed on the side of the output pole ear of the battery pack and is connected to the battery pack through a rigid sampling component. However, due to factors such as production and assembly tolerances and the expansion of the battery pack, the flexible circuit board is easily pulled at the connection with the sampling component, resulting in poor connection stability, and further affecting the safety performance of the battery pack. Summary of the Utility Model

[0003] In order to overcome the disadvantages and deficiencies in the prior art, the purpose of the utility model is to provide a flexible circuit board and a battery pack, so as to solve the problem that the connection stability of the flexible circuit board at the connection with the sampling component is poor, and further affect the safety performance of the battery pack.

[0004] The purpose of the utility model is realized by the following technical solutions:

[0005] A flexible circuit board, including a main body part and a plurality of protruding parts. The protruding part has a protruding direction, a thickness direction, and a width direction; along a direction parallel to the protruding direction, one end of the protruding part is connected to the main body part, and the other end is used for connecting to a sampling component; at least one side of the protruding part in the width direction has a notch, so that the protruding part can be deformed; the notch includes an edge, and the edge is an arc-shaped edge, or the edge is a straight edge that is not parallel to the width direction of the protruding part.

[0006] In one embodiment, the protruding direction, the thickness direction, and the width direction are perpendicular to each other in pairs.

[0007] In one embodiment, along the width direction, at least one notch is provided on each of the two sides of the protruding part.

[0008] In one embodiment, the protruding part includes at least two notches, and the notches are arranged at intervals along the protruding direction. Two adjacent notches along the protruding direction are respectively arranged on the two sides of the protruding part in the width direction.

[0009] In one embodiment, the notch includes two opposite edges, and at least one of the two edges is an arc-shaped edge, or both edges are straight edges.

[0010] In one embodiment, the notch includes two oppositely arranged edges, the flexible circuit board includes a first connecting portion, and two ends of the first connecting portion are respectively connected to the two oppositely arranged edges of the notch. The first connecting portion can be stretched or broken when a force is applied thereto.

[0011] In one embodiment, the flexible circuit board includes a second connecting portion. One end of the second connecting portion is connected to the main body portion, and the other end is connected to the protruding portion. The second connecting portion can be stretched or broken when a force is applied thereto.

[0012] In one embodiment, the flexible circuit board includes a third connecting portion. The third connecting portion is used to connect at least two of the protruding portions. The third connecting portion can be stretched or broken when a force is applied thereto.

[0013] In one embodiment, the main body portion includes at least one receiving groove, and at least one of the protruding portions is disposed in the receiving groove.

[0014] The present utility model also provides a battery pack, including the flexible circuit board as described above.

[0015] Advantages of the present utility model:

[0016] The flexible circuit board is connected to the battery pack through a rigid sampling component. When a situation such as cell swelling occurs, the sampling component is offset relative to the flexible circuit board under the influence of the battery pack. The protruding portion described in this solution is used to connect to the sampling component, and a deformable notch is provided on the protruding portion. Thus, the protruding portion can be stretched to adapt to the offset of the sampling component; on the other hand, the notch includes an edge, and the edge is an arc-shaped edge, or the edge is a straight edge that is not parallel to the width direction of the protruding portion. Thus, the connection transition of the protruding portion at the notch is smoother, and further, the wiring of the printed circuit on the protruding portion can be more fluent, which is beneficial to reducing the total length of the wiring of the printed circuit on the protruding portion and facilitating the wiring design of the flexible circuit board. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Schematic structural diagram of a flexible circuit board with a receiving groove accommodating multiple protruding portions connecting a sampling component;

[0019] Figure 2Schematic diagram of the structure of a flexible circuit board connecting a sampling component with a plurality of accommodation grooves, where each accommodation groove can accommodate at most one protruding part;

[0020] Figure 3 It is Figure 1 The enlarged schematic diagram of part A in

[0021] Figure 4 It is Figure 2 The enlarged schematic diagram of part B in

[0022] Figure 5 It is Figure 3 Schematic diagram of another implementation;

[0023] Figure 6 It is Figure 4 Schematic diagram of another implementation;

[0024] Figure 7 It is Figure 3 Schematic diagram of another implementation;

[0025] Figure 8 It is Figure 4 Schematic diagram of another implementation;

[0026] Figure 9 It is Figure 3 Schematic diagram of another implementation;

[0027] Figure 10 It is Figure 4 Schematic diagram of another implementation;

[0028] Figure 11 It is Figure 5 The enlarged schematic diagram of part C in

[0029] In the figure: 1 main body part, 2 protruding parts, 21 notch, 211 edge, 2111 arc edge, 2112 straight edge, 2113 arc, 3 first connecting part, 4 second connecting part, 5 third connecting part, 6 connecting piece, 7 accommodation groove. Specific implementation

[0030] Next, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "arranged", "installed", "connected", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0032] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of description and simplification of 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 therefore should not be construed as a limitation of the present utility model.

[0033] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0034] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0035] A flexible circuit board, as Figures 1 to 11 shown, includes a main body portion 1 and a plurality of protruding portions 2. The protruding portion 2 has a protruding direction X, a thickness direction D, and a width direction W; along a direction parallel to the protruding direction X, one end of the protruding portion 2 is connected to the main body portion 1, and the other end is used to connect to a sampling component; at least one side of the protruding portion 2 in the width direction W has a notch 21 to enable the protruding portion 2 to deform; the notch 21 includes an edge 211, and the edge 211 is an arc-shaped edge 2111, or the edge 211 is a straight edge 2112 that is not parallel to the width direction W of the protruding portion 2.

[0036] The flexible circuit board is connected to the battery pack through a rigid sampling component. When the battery cell expands or other situations occur, the sampling component is offset relative to the flexible circuit board under the influence of the battery pack. The protruding part 2 of this solution is used to connect to the sampling component, and a deformable notch 21 is provided on the protruding part 2. Thus, the protruding part 2 can expand and contract to adapt to the offset of the sampling component. On the other hand, the notch 21 includes an edge 211, and the edge 211 is an arc-shaped edge 2111, or the edge 211 is a straight edge 2112 that is not parallel to the width direction W of the protruding part 2. Thus, the connection transition of the protruding part 2 at the notch 21 is smoother, and further, the wiring of the printed circuit on the protruding part 2 can be more fluent, which is beneficial to reducing the total length of the wiring of the printed circuit on the protruding part 2 and facilitating the wiring design of the flexible circuit board.

[0037] As an implementation manner, as Figures 1 to 11 shown, the protruding direction X, the thickness direction D, and the width direction W are perpendicular to each other in pairs. Thus, when the notches 21 are evenly arranged on both sides of the protruding part 2 in the width direction W, the protruding part 2 can balance the deformable degree of its deviation from the protruding direction X on one side of the width direction W and its deformable degree of deviation from the protruding direction X on the other side of the width direction W.

[0038] As an implementation manner, as Figures 3 to 11 shown, along the width direction W, at least one notch 21 is provided on each side of the protruding part 2. Thus, the protruding part 2 can deform both in the direction of deviating from the protruding direction X on one side of the width direction W and in the direction of deviating from the protruding direction X on the other side of the width direction W.

[0039] As an implementation manner, as Figures 3 to 11 shown, the protruding part 2 includes at least two notches 21, and the notches 21 are arranged at intervals along the protruding direction X. Two adjacent notches 21 along the protruding direction X are respectively arranged on both sides of the protruding part 2 in the width direction W. Thus, the protruding part 2 can expand and contract at each notch 21.

[0040] As an implementation manner, as Figures 3 to 11 shown, the notch 21 includes two relatively arranged edges 211, and at least one of the two edges 211 is an arc-shaped edge 2111, or both of the two edges 211 are straight edges 2112.

[0041] As an implementation manner, the two relatively arranged edges 211 of the notch 21 are both straight edges 2112, and the two straight edges 2112 are parallel to each other or have an included angle.

[0042] As an implementation manner, as Figure 5 、 Figure 6 and Figure 11, the notch 21 includes two oppositely arranged edges 211. The flexible circuit board includes a first connecting portion 3. Two ends of the first connecting portion 3 are respectively connected to the two oppositely arranged edges 211 of the notch 21. The first connecting portion 3 can expand and contract or break under force. Thereby, the structural stability of the protruding portion 2 is improved, and the problem that the protruding portion 2 is prone to bending damage due to self-expansion and contraction during production, transportation, etc. before connecting the sampling component is avoided. The first connecting portion 3 can expand and contract or break under force to avoid affecting the expansion and contraction deformation performance of the protruding portion 2 after connecting the sampling component.

[0043] As an implementation manner, such as Figure 4 , the two oppositely arranged edges 211 of the notch 21 are connected by an arc 2113. Thereby, it is beneficial to alleviate the problem that the protruding portion 2 is prone to tearing at the connection of the two oppositely arranged edges 211 when being pulled.

[0044] As an implementation manner, such as Figure 8 , the flexible circuit board includes a second connecting portion 4. One end of the second connecting portion 4 is connected to the main body portion 1, and the other end is connected to the protruding portion 2. The second connecting portion 4 can expand and contract or break under force. Thereby, the setting of the second connecting portion 4 also improves the structural stability of the protruding portion 2, and the problem that the protruding portion 2 is prone to bending damage due to self-expansion and contraction deformation during production, transportation, etc. before connecting the sampling component is avoided. The second connecting portion 4 can expand and contract or break under force to avoid affecting the expansion and contraction deformation performance of the protruding portion 2 after connecting the sampling component.

[0045] As an implementation manner, such as Figure 8 , the second connecting portion 4 is connected to the side end of the protruding portion 2 along the width direction.

[0046] As an implementation manner, such as Figure 8 , the second connecting portion 4 is connected to the protruding portion 2 near the sampling component.

[0047] As an implementation manner, such as Figure 7 , the flexible circuit board includes a third connecting portion 5. The third connecting portion 5 is used to connect at least two protruding portions 2. The third connecting portion 5 can expand and contract or break under force. Thereby, the setting of the third connecting portion 5 also improves the structural stability of the protruding portion 2, and the problem that the protruding portion 2 is prone to bending damage due to self-expansion and contraction deformation during production, transportation, etc. before connecting the sampling component is avoided. The third connecting portion 5 can expand and contract or break under force to avoid affecting the expansion and contraction deformation performance of the protruding portion 2 after connecting the sampling component.

[0048] As an implementation manner, such as Figure 1 and Figure 2, the main body portion 1 includes at least one receiving groove 7, and at least one protruding portion 2 is disposed in the receiving groove 7. The receiving groove 7 is a groove or notch formed by extending from the edge of the main body portion 1 into the main body portion 1 in a direction parallel to the protruding direction X. Thus, when the size of the flexible circuit board in the protruding direction X is constant, this embodiment is beneficial to retain more of the main body portion 1 to increase the wirable area of the main body portion 1.

[0049] As an embodiment, the main body portion 1 includes at least one receiving groove 7, and each protruding portion 2 is disposed in the receiving groove 7.

[0050] As an embodiment, the main body portion 1 includes at least one receiving groove 7, and each protruding portion 2 is disposed in the same receiving groove 7.

[0051] As an embodiment, the main body portion 1 includes a plurality of receiving grooves 7, and at most one protruding portion 2 is disposed in one receiving groove 7.

[0052] As an embodiment, as Figure 1 and Figure 2 , the main body portion 1 has a length direction, and the length direction of the main body portion 1 is parallel to the width direction W of the protruding portion 2.

[0053] As an embodiment, the dimension of the main body portion 1 in its own length direction is greater than its dimension in other directions.

[0054] As an embodiment, the main body portion 1 is integrally connected to the protruding portion 2.

[0055] The present utility model further provides a battery pack, including the flexible circuit board as described above.

[0056] As an embodiment, the battery pack further includes a sampling component, and the protruding portion 2 is connected to the sampling component.

[0057] As an embodiment, as Figure 1 and Figure 2 shown, the sampling component includes a connecting member 6.

[0058] As an embodiment, the connecting member 6 is a nickel sheet.

[0059] As an embodiment, the sampling component is a bus bar or a tab, and the protruding portion 2 is directly connected to the bus bar or the tab.

[0060] As an embodiment, the protruding portion 2 is connected to the sampling component by welding.

[0061] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications using the above-disclosed technical content within the scope of the technical solution of the present utility model, which are equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. Flexible circuit board, characterized in that, It includes a main body portion (1) and a plurality of protruding portions (2). The protruding portion (2) has a protruding direction (X), a thickness direction (D), and a width direction (W). Along a direction parallel to the protruding direction (X), one end of the protruding portion (2) is connected to the main body portion (1), and the other end is for connecting to a sampling component. At least one side of the protruding portion (2) in the width direction (W) has a notch (21) so that the protruding portion (2) can deform. The notch (21) includes an edge (211), and the edge (211) is an arc-shaped edge (2111), or the edge (211) is a straight edge (2112) not parallel to the width direction (W) of the protruding portion (2).

2. The flexible circuit board according to claim 1, characterized in that, The protruding direction (X), the thickness direction (D), and the width direction (W) are perpendicular to each other in pairs.

3. The flexible circuit board according to claim 1, wherein Along the width direction (W), at least one of the notches (21) is provided on each of the two sides of the protruding portion (2).

4. The flexible circuit board according to claim 1, characterized in that, The protruding portion (2) includes at least two notches (21), and the notches (21) are arranged at intervals along the protruding direction (X). Two adjacent notches (21) along the protruding direction (X) are respectively arranged on the two sides of the protruding portion (2) in the width direction (W).

5. The flexible circuit board according to claim 1, wherein The notch (21) includes two oppositely arranged edges (211), and at least one of the two edges (211) is an arc-shaped edge (2111), or both of the two edges (211) are straight edges (2112).

6. The flexible circuit board according to claim 1, wherein The notch (21) includes two oppositely arranged edges (211). The flexible circuit board includes a first connecting portion (3), and the two ends of the first connecting portion (3) are respectively connected to the two oppositely arranged edges (211) of the notch (21), and the first connecting portion (3) can stretch or break under force.

7. The flexible circuit board according to claim 1, wherein The flexible circuit board includes a second connecting portion (4). One end of the second connecting portion (4) is connected to the main body portion (1), and the other end is connected to the protruding portion (2), and the second connecting portion (4) can stretch or break under force.

8. The flexible circuit board according to claim 1, wherein The flexible circuit board includes a third connecting portion (5), and the third connecting portion (5) is used to connect at least two protruding portions (2), and the third connecting portion (5) can stretch or break under force.

9. The flexible circuit board according to claim 1, characterized in that, The main body portion (1) includes at least one receiving groove (7), and at least one of the protruding portions (2) is arranged in the receiving groove (7).

10. Battery pack, characterized in that, It includes the flexible circuit board according to any one of claims 1 to 9.

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