CN220674005U

CN220674005U - Flexible circuit board and battery pack

Info

Publication number: CN220674005U
Application number: CN202322278581.2U
Authority: CN
Inventors: 何振亮; 陈家龙; 陈诚
Original assignee: Microvast Power Systems Huzhou Co Ltd
Current assignee: Microvast Power Systems Huzhou Co Ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-03-26
Anticipated expiration: 2033-08-22

Abstract

The utility model discloses a flexible circuit board and a battery pack, wherein the flexible circuit board comprises a main body part and a plurality of extending parts, one ends of the extending parts are connected with the main body part, and the other ends of the extending parts are used for connecting sampling parts; the connecting part is connected with at least two adjacent extending parts through the connecting part, and the connecting part can stretch out and draw back or break under the stress. The utility model is beneficial to relieving the stress of the flexible circuit board at the position where the sampling component is connected, improving the connection stability of the flexible circuit board and the sampling component, and improving the safety performance of the battery pack.

Description

Flexible circuit board and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a flexible circuit board and a battery pack.

Background

The battery pack for the new energy vehicle or the energy storage comprises a battery pack, the information of the batteries in the battery pack is collected through a long strip-shaped flexible circuit board so as to monitor and manage the batteries, and the flexible circuit board is fixed on the tab-out side of the battery pack and is connected with the battery pack through a hard sampling component. However, due to the tolerance of production and assembly, the connection positions of the battery packs, which are connected with the flexible circuit board through the sampling components, are uneven, so that the sampling components connected with the battery packs are uneven, and in addition, the battery packs can be expanded and deformed in the use process, and the flexible circuit board is easily pulled at the connection sampling components, so that the connection stability is poor, and the safety performance of the battery pack is further affected.

Disclosure of Invention

In order to overcome the defects and the shortcomings in the prior art, the utility model aims to provide a flexible circuit board and a battery pack, and solve the problems that the connection stability of the flexible circuit board at a connection sampling part is poor, and the safety performance of the battery pack is further affected.

The aim of the utility model is achieved by the following technical scheme:

a flexible circuit board comprises a main body part and a plurality of extending parts, wherein one ends of the extending parts are connected with the main body part, and the other ends of the extending parts are used for being connected with sampling parts; the connecting part is connected with at least two adjacent extending parts through the connecting part, and the connecting part can stretch out and draw back or break under the stress.

In one embodiment, the extension includes a telescoping section that is telescoping; the telescopic joint comprises a fixed end and a telescopic end, the fixed end is connected to the main body part, and the telescopic end is used for connecting a sampling component; when the telescopic joint is stressed and stretches, the telescopic end can displace relative to the fixed end.

In one embodiment, the connection is connected to the telescopic joint.

In an embodiment, the telescopic joint further comprises a telescopic section, and the fixed end and the telescopic end are connected through at least one telescopic section.

In one embodiment, the telescoping section comprises an arcuate section; or, the telescopic sections comprise at least two sub-telescopic sections which are connected in sequence, and an included angle exists between every two adjacent sub-telescopic sections.

In an embodiment, the fixed end and the telescopic end are connected by two telescopic sections.

In an embodiment, the two telescopic segments are symmetrically arranged with a connecting line of the fixed end and the telescopic end as a symmetry axis.

In an embodiment, the telescopic section comprises two linear sub telescopic sections, and the two telescopic sections are enclosed into a diamond ring.

In an embodiment, the angle between at least two adjacent sub-telescoping sections of the telescoping sections is alpha, wherein 0 deg. alpha.ltoreq.90 deg..

In an embodiment, the telescopic sections are arc-shaped, and the two telescopic sections enclose a circular ring.

In one embodiment, the connection portion has a weakened portion.

In one embodiment, the sampling member includes a connector.

According to another aspect of the present utility model, there is provided a battery pack including the above flexible circuit board.

The utility model has the beneficial effects that:

1. the flexible circuit board comprises a main body part and a plurality of extending parts, and the part, used for connecting the sampling part, on the flexible circuit board is independent from the main body part, so that the flexible extending parts can be used for buffering and spreading due to the fact that the connecting position is uneven and the battery pack is expanded and deformed, and the connection stability is improved, and the safety performance of the battery pack is improved.

2. The flexible circuit board further comprises a connecting portion, wherein the connecting portion is used for connecting two adjacent extending portions, and therefore the extending portions independent of the main body portion can be connected through the connecting portion to improve structural stability of the extending portions during production and assembly.

Drawings

FIG. 1 is a schematic diagram of a flexible circuit board connection unit according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a flexible circuit board according to an embodiment of the utility model;

FIG. 3 is an enlarged view of a portion of area A of FIG. 1;

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

FIG. 5 is an enlarged view of a portion of area A of FIG. 1 in another embodiment;

FIG. 6 is an enlarged view of a portion of area A of FIG. 1 in another embodiment;

FIG. 7 is an enlarged view of a portion of region A of FIG. 1 in another embodiment;

FIG. 8 is a schematic view of a structure of a connecting portion in an embodiment;

FIG. 9 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 10 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 11 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 12 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 13 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 14 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 15 is a schematic view of a structure of a connecting portion in another embodiment;

FIG. 16 is a schematic view of a structure of a connecting portion in another embodiment;

fig. 17 is a schematic structural view of a connecting portion in another embodiment.

In the figure: 1-main body part, 2-extension, 21-telescopic joint, 211-fixed end, 212-telescopic end, 213-telescopic section, 2131-sub-telescopic section, 3-connecting part, 31-weakening part, 32-sub-connecting part, 4-connecting piece.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.

The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.

The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.

The utility model provides a flexible circuit board, as shown in figures 1 and 2, comprising a main body part 1 and a plurality of extending parts 2, wherein one end of each extending part 2 is connected with the main body part 1, and the other end of each extending part 2 is used for being connected with a sampling component; the connecting part 3 is also included, at least two adjacent extending parts 2 are connected through the connecting part 3, and the connecting part 3 can stretch out and draw back or break under the stress.

Among the above-mentioned technical scheme, the flexible circuit board includes main part 1 and a plurality of extension portion 2, be used for connecting sampling part's position on the flexible circuit board and independently become extension portion 2 from main part 1, from this, because the tolerance of production equipment, respectively connect the connection position height of flexible circuit board through sampling part on the group battery, lead to connecting the sampling part height in each connection position uneven, and then lead to the flexible circuit board to receive when pulling in connection sampling part department, flexible extension portion 2 can cushion and apportion the pulling stress of connection sampling part department on the flexible circuit board, be favorable to improving connection stability, and then improve the security performance of battery package. On the other hand, the flexible circuit board further includes a connection part 3, the connection part 3 being for connecting adjacent two of the extension parts 2, whereby the extension parts 2 independent of the main body part 1 can be connected by the connection part 3 to improve structural stability of the extension parts 2 during production and assembly; meanwhile, the connecting part 3 can stretch out and draw back or break under the stress, so that when one of the extending parts 2 is pulled, the corresponding connecting part 3 can stretch out and draw back or break so as to avoid the other extending parts 2 from being involved, and meanwhile, the pulling stress generated by the expansion of the battery pack and applied to the sampling part can be buffered and shared.

As an embodiment, as shown in fig. 1 to 7, the extension 2 comprises a telescopic expansion joint 21; the telescopic joint 21 comprises a fixed end 211 and a telescopic end 212, wherein the fixed end 211 is connected with the main body part 1, and the telescopic end 212 is used for connecting a sampling component; when the telescopic joint 21 is stressed to stretch and retract, the telescopic end 212 can displace relative to the fixed end 211. In this way, when the distance between the connection position for connecting the sampling member and the main body portion 1 on the battery pack changes due to factors such as battery expansion, the telescopic joint 21 can be telescopic, and the telescopic end 212 can be displaced relative to the fixed end 211 to accommodate the change.

As an embodiment, as shown in fig. 3 to 7, the connection portion 3 is connected to the expansion joint 21. Thereby, stability of the telescopic joint 21 of the flexible circuit board during production and assembly can be improved.

As an embodiment, as shown in fig. 3 to 7, the telescopic joint 21 further comprises a telescopic section 213, and the fixed end 211 and the telescopic end 212 are connected by at least one telescopic section 213.

As an embodiment, as shown in fig. 5 and 7, the telescopic section 213 comprises an arc-shaped section; alternatively, as shown in fig. 1 to 4, and fig. 6, the telescopic section 213 includes at least two sub-telescopic sections 2131 connected in sequence, and an included angle exists between two adjacent sub-telescopic sections 2131. In this embodiment, the arc-shaped section of the telescopic section 213 or the two sub-telescopic sections 2131 having an included angle are easily deformed and telescopic by force, thereby realizing the expansion and contraction of the telescopic joint 21.

As an embodiment, as shown in fig. 3 to 5, the fixed end 211 and the telescopic end 212 are connected by two telescopic sections 213. Compared with the arrangement of only one telescopic section 213, the arrangement of two telescopic sections 213 can weaken the hardness of each telescopic section 213 on the premise of not compressing the wiring space, so that the telescopic performance of each telescopic section 213 is improved.

As an embodiment, as shown in fig. 3 to 5, the two telescopic sections 213 are symmetrically disposed with a line connecting the fixed end 211 and the telescopic end 212 as a symmetry axis. Thereby, it is advantageous to make the structure more compact to better utilize the space, and to make the structural strength of each telescopic section 213 the same.

As an embodiment, as shown in fig. 4, the telescopic section 213 includes two linear sub-telescopic sections 2131, and the two telescopic sections 213 are enclosed into a diamond ring. The diamond shape is a special parallelogram, and the embodiment makes the shape formed by the two telescopic sections 213 not only be an unstable parallelogram which is easy to deform and expand, but also makes the two telescopic sections 213 symmetrically arranged with the connecting line of the fixed end 211 and the telescopic end 212 as a symmetrical axis.

As an embodiment, the angle between at least two adjacent sub-telescoping segments 2131 of the telescoping segment 213 is α, wherein 0 ° < α+.ltoreq.90°. Specifically, when the two telescopic sections 213 are enclosed into a diamond ring, the distance between the fixed end 211 and the telescopic end 212 can be shortened in this embodiment, so as to reduce the outer size of the flexible circuit board, reduce the cost, and increase the upper limit of the extendable distance of the telescopic end 212.

As another embodiment, as shown in fig. 5, the telescopic sections 213 are arc-shaped, and two telescopic sections 213 are enclosed into a circular ring. Specifically, the ring may be a right circular ring or an elliptical ring.

As an embodiment, as shown in fig. 8 to 10, the connecting portion 3 is linear and has a weakened portion 31. The provision of the weakened portions 31 can weaken the strength of the connecting portion 3 so that the connecting portion 3 can be broken in time. As another embodiment, as shown in fig. 11 to 13, the connection portion 3 includes at least two sub-connection portions 32 connected in sequence, and an included angle exists between two adjacent sub-connection portions 32; alternatively, as shown in fig. 14 to 17, the connecting portion 3 includes an arc-shaped section. Thereby, the connection portion 3 can expand and contract.

As an embodiment, as shown in fig. 12, 13, 15 to 17, a weakening 31 is provided on the connection 3 with at least two sub-connections 32 or with an arcuate section.

As an embodiment, as shown in fig. 9, the weakening portion 31 may be a closed loop hole formed inside the connecting portion 3; as shown in fig. 8, the weakened portion 31 may be an open notch formed at an edge of the connecting portion 3.

As an embodiment, the sampling member comprises a connector 4. In particular, the connecting element 4 may be a nickel plate.

As an embodiment, the extension 2 may also be directly connected to a busbar or tab.

The embodiment of the utility model also provides a battery pack. The battery pack includes the flexible circuit board described above.

The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims

1. A flexible circuit board, characterized by comprising a main body part (1) and a plurality of protruding parts (2), wherein one end of each protruding part (2) is connected with the main body part (1), and the other end of each protruding part (2) is used for being connected with a sampling component; the connecting part (3) is further included, at least two adjacent extending parts (2) are connected through the connecting part (3), and the connecting part (3) can stretch out and draw back or break under the stress.

2. A flexible circuit board according to claim 1, characterized in that the extension (2) comprises a telescopic joint (21); the telescopic joint (21) comprises a fixed end (211) and a telescopic end (212), the fixed end (211) is connected to the main body part (1), and the telescopic end (212) is used for connecting a sampling component; when the telescopic joint (21) is stressed and stretches, the telescopic end (212) can displace relative to the fixed end (211).

3. A flexible circuit board according to claim 2, characterized in that the connection part (3) is connected to the telescopic joint (21).

4. A flexible circuit board according to claim 2, characterized in that the telescopic joint (21) further comprises a telescopic section (213), the fixed end (211) and the telescopic end (212) being connected by at least one of the telescopic sections (213).

5. The flexible circuit board of claim 4 wherein said telescoping section (213) comprises an arcuate section; or, the telescopic section (213) comprises at least two sub-telescopic sections (2131) which are connected in sequence, and an included angle exists between every two adjacent sub-telescopic sections (2131).

6. A flexible circuit board according to claim 4, characterized in that the fixed end (211) and the telescopic end (212) are connected by two telescopic sections (213).

7. A flexible circuit board according to claim 6, characterized in that the two telescopic sections (213) are symmetrically arranged with respect to the line connecting the fixed end (211) and the telescopic end (212) as an axis of symmetry.

8. The flexible circuit board of claim 6 wherein said telescoping section (213) comprises two linear sub-telescoping sections (2131), two of said telescoping sections (213) enclosing a diamond ring.

9. The flexible circuit board according to claim 5 or 8, characterized in that the angle between at least two adjacent sub-telescoping sections (2131) of the telescoping sections (213) is α, wherein 0 ° < α+.ltoreq.90°.

10. A flexible circuit board according to claim 6, characterized in that the telescopic sections (213) are arc-shaped, and that the two telescopic sections (213) enclose a circular ring.

11. A flexible circuit board according to claim 1, characterized in that the connection part (3) has a weakening part (31).

12. A flexible circuit board according to claim 1, characterized in that the sampling member comprises a connector (4).

13. A battery pack comprising the flexible circuit board of any one of claims 1 to 12.