CN220628165U - FPC collection system and battery module - Google Patents

Abstract

The application provides a FPC collection system and battery module, FPC collection system includes: the FPC board is in a strip shape and comprises a first FPC section, a second FPC section and a third FPC section which are sequentially connected along the length direction of the FPC board, the first FPC section is attached to the first surface of the battery module body, the second FPC section is formed after being folded and bent relative to the first FPC section, the second FPC section is attached to the second surface of the battery module body, the third FPC section is formed after being folded and bent relative to the second FPC section, and the third FPC section is attached to the third surface of the battery module body; the signal acquisition sheet is arranged at the first FPC segment; the signal output interface is arranged at the third FPC segment. The application does not need to adopt the FPC board similar to the Z shape, but adopts the strip FPC board instead, thereby reducing the material cost for manufacturing the FPC board.

Description

FPC collection system and battery module

Technical Field

The application relates to the technical field of batteries, in particular to an FPC collecting device and a battery module.

Background

In the related art, most of FPC boards (Flexible Printed Circuit, flexible circuit boards) in the battery module are disposed on the side of the battery module body, and a part of the FPC boards are bent to the upper surface of the battery module body by 90 ° and then a part of the FPC boards on the upper surface are bent to the front surface of the battery module body by 90 ° so that signals collected by the FPC boards can be outputted outwards from the front surface of the battery module body.

However, the planar shape of such FPC boards is generally similar to a zigzag shape, and when such FPC boards are manufactured, a large area of FPC material without wiring needs to be cut out by a cutting die, which causes waste of the FPC material, thereby increasing the material cost for manufacturing the FPC boards.

Therefore, how to reduce the material cost for manufacturing the FPC board is a technical problem that needs to be solved by the current battery module.

Disclosure of Invention

The embodiment of the application provides an FPC collection system and battery module, can reduce the material cost of preparation FPC board.

In a first aspect, embodiments of the present application provide an FPC capture device, the FPC capture device comprising:

the FPC board is in a strip shape and comprises a first FPC section, a second FPC section and a third FPC section which are sequentially connected along the length direction of the FPC board, the first FPC section, the second FPC section and the third FPC section are integrally formed, the first FPC section is attached to the first surface of the battery module body, the second FPC section is formed after being folded and bent relative to the first FPC section, the second FPC section is attached to the second surface of the battery module body, the third FPC section is formed after being folded and bent relative to the second FPC section, the third FPC section is attached to the third surface of the battery module body, and the first surface, the second surface and the third surface are mutually adjacent surfaces;

the signal acquisition sheet is arranged at the first FPC segment;

and the signal output interface is arranged at the third FPC segment.

In an embodiment, the folding direction of the second FPC segment relative to the first FPC segment is oblique to the length direction of the FPC board, and the folding direction of the third FPC segment relative to the second FPC segment is oblique to the length direction of the FPC board.

In an embodiment, an included angle formed by a direction of the second FPC segment relative to a fold line when the first FPC segment is folded and a length direction of the FPC board is 45 °, and an included angle formed by a direction of the third FPC segment relative to the fold line when the second FPC segment is folded and the length direction of the FPC board is 45 °.

In an embodiment, a groove is formed in a side, facing the second surface, of the first FPC segment, an S-shaped connector is included in the first FPC segment, the S-shaped connector is disposed in the groove, the S-shaped connector includes a first end portion and a second end portion, the first end portion is fixed to a first side wall of the groove, and the signal acquisition sheet is fixed to the second end portion.

In an embodiment, the cross section of the first FPC segment includes a first protective film layer, an FPC substrate layer, a cover film layer and a second protective film layer that are stacked in sequence, the first protective film layer is located on one side of the first FPC segment, which is close to the battery module body, and one end of the signal acquisition sheet is fixed between the FPC substrate layer and the cover film layer at the second end.

In an embodiment, the second end portion is connected to a second side wall of the groove through a micro-connection section, and the second side wall is disposed opposite to the first side wall.

In an embodiment, a positioning hole is formed in a side, away from the S-shaped connecting piece, of the groove, the positioning hole penetrates through the first protective film layer, the FPC substrate layer, the cover film layer and the second protective film layer in sequence, and the positioning hole is used for a positioning column on the battery module body to penetrate through.

In an embodiment, the signal acquisition sheet includes a first signal acquisition section and a second signal acquisition section, the first signal acquisition section and the second signal acquisition section are sequentially connected along a length direction of the signal acquisition sheet, the first signal acquisition section is arranged on the first surface, and the end part of the first signal acquisition section, which is far away from the second signal acquisition section, is fixed on the second end part, the second signal acquisition section is formed after being bent relative to the first signal acquisition section, the second signal acquisition section is attached to the second surface, and the end part of the second signal acquisition section, which is far away from the first signal acquisition section, is fixed on a busbar on the second surface.

In an embodiment, a separation distance between the crease when the second signal acquisition segment is bent relative to the first signal acquisition segment and the second end is greater than or equal to a preset distance.

In a second aspect, embodiments of the present application provide a battery module, the battery module including a battery module body, and an FPC collection device as set forth in any one of the above, the FPC collection device being configured to collect a battery status signal in the battery module body.

The beneficial effects of the embodiment of the application are that:

in the embodiment of the application, adopt long banding FPC board, divide into three FPC section with long banding FPC board, through folding and bending between FPC section and the FPC section, laminate one of them FPC section to other adjacent surfaces of battery module main part, finally make the signal that the FPC board gathered can follow the third FPC section department of laminating in the third surface of battery module main part export outward, and need not to adopt the FPC board that is similar to "Z" font, compare the FPC board that is similar to "Z" font, the material waste of long banding FPC board is less, thereby reduce the material cost of preparation FPC board.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of an FPC collection device and a battery module body provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a detailed structure of the area A in FIG. 1;

fig. 3 is a schematic view of an unfolded structure of the FPC board of fig. 1;

fig. 4 is a schematic structural view of the FPC board of fig. 1 after being folded and bent;

FIG. 5 is a schematic view of a refinement of region B of FIG. 1;

FIG. 6 is a schematic plan view of a portion of the structure of the first FPC segment of FIG. 5;

fig. 7 is a schematic view of a laminated structure in a cross section of the first FPC segment;

fig. 8 is a schematic diagram of another refinement of region B in fig. 1.

Reference numerals illustrate:

1. an FPC acquisition device; 10. an FPC board; 11. a first FPC segment; 12. a second FPC segment; 13. a third FPC segment; 14. a first dotted line; 15. a second dashed line; 16. a third dashed line; 17. a fourth dashed line; 18. a groove; 181. a first sidewall; 182. a second sidewall; 183. positioning holes; 19. an "S" shaped connector; 191. a first end; 192. a second end; 193. a micro-connection section; 111. a first protective film layer; 112. an FPC substrate layer; 113. covering a film layer; 114. a second protective film layer; 20. a signal acquisition sheet; 21. a first signal acquisition segment; 22. a second signal acquisition segment; 23. a crease when the second signal acquisition segment 22 is bent relative to the first signal acquisition segment 21; 30. a signal output interface; 2. a battery module body; 3. positioning columns; 4. and a bus bar.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application. In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

In order to reduce the material cost of preparation FPC board, this application embodiment provides a FPC collection system and battery module, adopt long banding FPC board, divide into three FPC section with long banding FPC board, fold and bend through between FPC section and the FPC section, laminate one of them FPC section to other adjacent surfaces of battery module main part, finally make the signal that the FPC board gathered can follow the third FPC section department of laminating in the third surface of battery module main part export outward, and need not to adopt the FPC board that is similar to "Z" font, compare like the FPC board of "Z" font, the material waste of long banding FPC board is less, thereby reduce the material cost of preparation FPC board, and need not to carry out unnecessary cutting procedure, the processing cycle of the FPC board has been reduced. The specific scheme is described in detail below.

In a first aspect, embodiments of the present application provide an FPC capture device. Referring to fig. 1 and 2, fig. 1 is a schematic diagram of the overall structure of the FPC collection device 1 and the battery module body 2, and fig. 2 is a schematic diagram of the detailed structure of the region a in fig. 1. As can be seen from fig. 1 and 2, the FPC clip 1 includes a signal clip 20, an FPC board 10, and a signal output interface 30, and the signal clip 20 is typically a nickel clip. The signal acquisition sheet 20 is used for acquiring a battery status signal in the battery module body 2, which is a signal in which the current voltage, the current temperature, and the like of the battery are recorded. The FPC board 10 is used for transmitting the battery status signal collected by the signal collection sheet 20 to the signal output interface 30 so as to output the battery status signal from the signal output interface 30 to the outside, for example, the signal output interface 30 may be connected to a BMS (Battery Management System ) outside the battery module so as to facilitate the monitoring and management of the status of the battery in the battery module body 2 by the BMS. The battery module body 2 accommodates therein a battery for providing electric power to the outside, for example, for providing electric power to an electric vehicle.

Referring to fig. 3 and 4, fig. 3 is a schematic view of an unfolding structure of the FPC board 10 in fig. 1, and fig. 4 is a schematic view of the folded and bent structure of the FPC board 10 in fig. 1. As can be seen from fig. 3, the unfolded FPC board 10 is in a strip shape, and includes a first FPC segment 11, a second FPC segment 12 and a third FPC segment 13 which are sequentially connected along the length direction of the FPC board 10, and the first FPC segment 11, the second FPC segment 12 and the third FPC segment 13 are integrally formed, so that the strip-shaped FPC board 10 is directly cut out by a cutting die, and the waste of FPC materials is avoided. The length direction of the FPC board 10 is exemplified as a right-to-left direction in fig. 3.

Referring to fig. 2 and 4, the first FPC segment 11 is attached to the first surface of the battery module body 2, the second FPC segment 12 is attached to the second surface of the battery module body 2, and the third FPC segment 13 is attached to the third surface of the battery module body 2, so that the signal output interface 30 is disposed at the third FPC segment 13 by disposing the signal acquisition sheet 20 at the first FPC segment 11, and the battery status signal can be output from the third surface of the battery module body 2 to the outside. The first surface, the second surface, and the third surface are adjacent surfaces to each other, and in fig. 2, the first surface is exemplified by one side surface of the battery module body 2, the second surface is exemplified by the upper surface of the battery module body 2, and the third surface is exemplified by the front surface of the battery module body 2. In order to more specifically describe the FPC collection device in the embodiment of the present application, the following is described with one side surface, the upper surface, and the front surface of the battery module body 2 shown in fig. 2 instead of the first surface, the second surface, and the third surface, specifically as follows:

referring to fig. 3 and 4, the second FPC segment 12 is formed by folding and bending with respect to the first FPC segment 11, the second FPC segment 12 being attached to the upper surface of the battery module body 2, wherein, folding means that after bending at least partially overlap together, i.e. the bending angle is 180 °, while bending means that after bending does not overlap but forms an angle, i.e. the bending angle is less than 180 °. In fig. 3, since the first FPC segment 11 is attached to one side of the battery module body 2, the second FPC segment 12 may be folded along the first imaginary line 14 with respect to the first FPC segment 11, and then the second FPC segment 12 may be folded along the second imaginary line 15 with respect to the first FPC segment 11, so as to form the relative positional relationship between the second FPC segment 12 and the first FPC segment 11 in fig. 4, so that the second FPC segment 12 is attached to the upper surface of the battery module body 2.

Similarly, the third FPC segment 13 is formed after being folded and bent with respect to the second FPC segment 12, and the third FPC segment 13 is attached to the front surface of the battery module body 2. Specifically, in fig. 3, after the second FPC segment 12 is attached to the upper surface of the battery module body 2, the third FPC segment 13 may be folded along a third imaginary line 16 with respect to the second FPC segment 12, and then the third FPC segment 13 may be folded along a fourth imaginary line 17 with respect to the second FPC segment 12, so as to form the relative positional relationship between the third FPC segment 13 and the second FPC segment 12 in fig. 4, so that the third FPC segment 13 is attached to the front surface of the battery module body 2.

In some embodiments of the present application, in fig. 3, the second FPC segment 12 is inclined with respect to the folding direction of the first FPC segment 11 (i.e., the normal direction of the first dashed line 14 in the plane of the FPC board 10) to the length direction of the FPC board 10, so that the folded second FPC segment 12 can be attached to the upper surface of the battery module body 2 by bending. Similarly, in fig. 3, the third FPC segment 13 is inclined with respect to the folding direction of the second FPC segment 12 (i.e., the normal direction of the third imaginary line 16 in the plane of the FPC board 10) to the length direction of the FPC board 10, so that the folded third FPC segment 13 can be attached to the front surface of the battery module body 2 by bending.

In a further embodiment, in fig. 3, the folding direction of the second FPC segment 12 with respect to the first FPC segment 11 is parallel to the folding direction of the third FPC segment 13 with respect to the second FPC segment 12, that is, the first broken line 14 is parallel to the third broken line 16, so that after the second FPC segment 12 is folded and folded from the side of the battery module body 2 and attached to the upper surface of the battery module body 2, the third FPC segment 13 can also be folded and folded from the upper surface of the battery module body 2 and attached to the front surface of the battery module body 2.

In a further embodiment, in fig. 3, the fold of the second FPC segment 12 when folded with respect to the first FPC segment 11 forms an angle of 45 ° with the length direction of the FPC board 10, that is, the first broken line 14 forms an angle of 45 ° with the length direction of the FPC board 10, so that after the second FPC segment 12 is folded and bent from the side of the battery module body 2 and attached to the upper surface of the battery module body 2, the second FPC segment 12 is parallel or perpendicular to the upper surface edge of the battery module body 2 to facilitate the mounting of the second FPC segment 12. Similarly, in fig. 3, the fold of the third FPC segment 13 when folded with respect to the second FPC segment 12 forms an angle of 45 ° with the length direction of the FPC board 10, that is, the third broken line 16 forms an angle of 45 ° with the length direction of the FPC board 10, so that after the third FPC segment 13 is folded and bent from the upper surface of the battery module body 2 and attached to the front surface of the battery module body 2, the second FPC segment 12 is parallel or perpendicular to the front surface edge of the battery module body 2 to facilitate the mounting of the third FPC segment 13.

In some embodiments of the present application, in fig. 3, the crease (i.e., the second dotted line 15) when the second FPC segment 12 is bent with respect to the first FPC segment 11, and the crease (i.e., the fourth dotted line 17) when the third FPC segment 13 is bent with respect to the second FPC segment 12 are all perpendicular to the length direction of the FPC board 10, so as to facilitate the bonding of the second FPC segment 12 to the upper surface of the battery module body 2 and the bonding of the third FPC segment 13 to the front surface of the battery module body 2.

In some embodiments of the present application, foam is provided at both the position where the second FPC segment 12 is folded with respect to the first FPC segment 11 and the position where the third FPC segment 13 is folded with respect to the second FPC segment 12. Specifically, foam is generally disposed between the two overlapped portions after folding to avoid rebound of the folded FPC. For example, after the second FPC segment 12 is folded with respect to the first FPC segment 11, the second FPC segment 12 at least partially overlaps the first FPC segment 11, and at this time, foam may be disposed between the overlapping portion in the second FPC segment 12 and the overlapping portion in the first FPC segment 11. For another example, after the third FPC segment 13 is folded with respect to the second FPC segment 12, the third FPC segment 13 at least partially overlaps the second FPC segment 12, and at this time, foam may be disposed between the overlapping portion in the third FPC segment 13 and the overlapping portion in the second FPC segment 12. In one example, the length and width of the foam may each be 1 millimeter.

In some embodiments of the present application, as shown in fig. 5, fig. 5 is a schematic diagram of a refinement of region B in fig. 1. In fig. 5, one end of the signal collection sheet 20 is connected to the first FPC segment 11, the other end is connected to the bus bar 4 of the upper surface of the battery module body 2, and a battery is connected below the bus bar 4 so that the signal collection sheet 20 collects a battery state signal. However, when the battery expands upward due to heat, the end of the signal acquisition sheet 20 connected to the busbar 4 also moves upward, which easily causes the signal acquisition sheet 20 to break, thereby affecting the acquisition of the battery status signal.

For this reason, the present embodiment improves a part of the structure in the first FPC segment 11. Specifically, as shown in fig. 6, fig. 6 is a schematic plan view of a partial structure of the first FPC segment 11 of fig. 5. In fig. 6, a groove 18 is provided on a side of the first FPC segment 11 facing the upper surface of the battery module body 2, the first FPC segment 11 includes an "S" shaped connector 19, the "S" shaped connector 19 is provided in the groove 18, and a gap exists between the "S" shaped connector 19 and the groove 18, the "S" shaped connector 19 includes a first end 191 and a second end 192, the first end 191 is fixed to the first side wall 181 of the groove 18, and the signal pickup sheet 20 is fixed to the second end 192, so that even if the battery expands upward, the "S" shaped connector 19 allows the signal pickup sheet 20 to move upward along with the bus bar 4 by a certain distance, thereby avoiding breakage of the signal pickup sheet 20. The structure shown in fig. 6 may be provided in plural at the same time to connect different signal acquisition sheets 20 respectively by different "S" type connection members 19.

In one example, the dimensions of the "S" shaped connector 19 are illustrated, for example, in fig. 6, to show a distance of 6 positions C, D, E, F, G, H, where C may be 6 mm, D may be 4 mm, E may be 10 mm, F may be 2 mm, G may be 8 mm, and H may be 7.2 mm.

In some embodiments of the present application, the material of the first FPC segment 11 is described. Referring to fig. 7, fig. 7 is a schematic view of a laminated structure in a cross section of the first FPC segment 11. In fig. 7, the first FPC segment 11 includes a first protective film layer 111, an FPC base material layer 112, a cover film layer 113, and a second protective film layer 114 laminated in this order, the first protective film layer 111 being located on a side of the first FPC segment 11 near the battery module body 2, and the second protective film layer 114 being located on a side of the first FPC segment 11 away from the battery module body 2. One end of the signal acquisition sheet 20 is fixed between the FPC substrate layer 112 and the cover film layer 113 at the second end 192 so that the signal acquisition sheet 20 is in contact with the FPC substrate layer 112, and thus, the battery status signal acquired by the signal acquisition sheet 20 can be transferred from the signal acquisition sheet 20 to the FPC substrate layer 112 so as to facilitate the transmission of the battery status signal in the FPC substrate layer 112.

The FPC substrate layer 112 may specifically include a PI (polyimide film) reinforcing layer, a substrate adhesive, and an FPC copper foil, which are laminated in sequence, wherein the PI reinforcing layer is disposed on one side of the FPC substrate layer 112 away from the cover film layer 113, the FPC copper foil is disposed on one side of the FPC substrate layer 112 close to the cover film layer 113, the end portion of the signal acquisition sheet 20 is specifically fixed between the FPC copper foil and the cover film layer 113, and the fixing of the end portion of the signal acquisition sheet 20 may be achieved by solder paste and reflow soldering.

In one example, the thickness of the FPC substrate layer 112 may be 0.11 millimeters, with a FPC copper foil thickness of 35 microns, a substrate adhesive thickness of 25 microns, and a PI stiffener layer thickness of 50 microns. The thicknesses of the first protective film layer 111 and the second protective film layer 114 are 50 micrometers, the adhesive between the first protective film layer 111 and the PI reinforcing layer, the adhesive between the second protective film layer 114 and the PI reinforcing layer, and the adhesive between the cover film layer 113 and the FPC copper foil are 25 micrometers, and the total thickness of the formed first FPC segment 11 is 0.3±0.05 millimeters.

In the process of forming the first FPC segment 11, after one end portion of the signal collecting sheet 20 is welded to the FPC substrate layer 112 and covered with the cover film layer 113, a second protective film layer 114 is further attached to the cover film layer 113 at this time, but due to the structural design of the "S" shaped connecting piece 19, the "S" shaped connecting piece 19 may shake, so that the second protective film layer 114 cannot be attached accurately.

For this reason, the present embodiment further improves the partial structure in the first FPC segment 11. Specifically, as shown in fig. 6, the second end 192 is connected to the second side wall 182 of the groove 18 through the micro-connection section 193, and the second side wall 182 is disposed opposite to the first side wall 181, so that the S-shaped connector 19 does not shake under the constraint of the micro-connection section 193, so that the second protective film 114 can be accurately attached, thereby increasing the yield and the production efficiency of the FPC. In one example, the width of the micro connection section in the direction perpendicular to the upper surface of the battery module body 2 may be 1 mm, thereby achieving micro connection.

In some embodiments of the present application, as shown in fig. 6, a positioning hole 183 is disposed on a side of the groove 18 away from the S-shaped connecting piece 19, the positioning hole 183 sequentially penetrates the first protective film layer 111, the FPC substrate layer 112, the cover film layer 113 and the second protective film layer 114, and the positioning hole 183 is used for passing through the positioning post 3 on the battery module body. Thus, when the second protective film 114 is attached to the S-shaped connecting piece 19, the positioning posts 3 can pass through the second protective film 114 through the positioning holes 183, so that the positioning posts 3 can position the first protective film 111, the FPC substrate 112, the cover film 113 and the second protective film 114 at the same time, and the difficulty of accurately attaching the second protective film 114 is further reduced.

In some embodiments of the present application, as shown in fig. 8, fig. 8 is another detailed structural schematic diagram of the region B in fig. 1. In fig. 8, the signal acquisition pad 20 includes a first signal acquisition pad 21 and a second signal acquisition pad 22, the first signal acquisition pad 21 and the second signal acquisition pad 22 are sequentially connected along a length direction of the signal acquisition pad 20, and the first signal acquisition pad 21 and the second signal acquisition pad 22 are integrally formed. The first signal acquisition segment 21 is arranged on the side surface of the battery module main body 2 where the first FPC segment 11 is located, the end part of the first signal acquisition segment 21, which is far away from the second signal acquisition segment 22, is fixed on the second end part 192, and the second signal acquisition segment 22 is formed after being bent relative to the first signal acquisition segment 21, so that the second signal acquisition segment 22 is attached to the upper surface of the battery module main body 2, and the end part of the second signal acquisition segment 22, which is far away from the first signal acquisition segment 21, is fixed on the busbar 4 on the upper surface of the battery module main body 2. Thus, the signal collecting plate 20 can collect the battery status signal from the bus bar 4 on the upper surface of the battery module body 2 and transmit the battery status signal to the first FPC segment 11 on the side surface of the battery module body 2.

In some embodiments of the present application, the crease 23 of the second signal acquisition segment 22 when bent relative to the first signal acquisition segment 21 is spaced from the second end 192 by a distance greater than or equal to a predetermined distance, thereby leaving a space between the crease and the second end 192. In this way, when the second signal acquisition segment 22 is bent by the bending jig, the bending jig can perform the bending operation by using the space between the crease and the second end 192, and the first FPC segment 11 is not pressed to affect the acquisition of the battery state signal. The preset distance is set based on a space required by the bending jig when the bending operation is performed, for example, the preset distance may be 2 mm.

In a second aspect, embodiments of the present application provide a battery module. The battery module includes a battery module body 2, and the FPC clip device 1 as described in any one of the above. The battery module main body 2 comprises the battery, the busbar 4 and the positioning column 3, and the FPC collecting device 1 is used for collecting battery state signals in the battery module main body 2, so that the material cost for manufacturing the FPC board 10 is reduced while the front surface of the battery module main body 2 outputs the battery state signals outwards.

The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims (10)

1. An FPC capture device, characterized in that the FPC capture device comprises:

the FPC board is in a strip shape and comprises a first FPC section, a second FPC section and a third FPC section which are sequentially connected along the length direction of the FPC board, the first FPC section, the second FPC section and the third FPC section are integrally formed, the first FPC section is attached to the first surface of the battery module body, the second FPC section is formed after being folded and bent relative to the first FPC section, the second FPC section is attached to the second surface of the battery module body, the third FPC section is formed after being folded and bent relative to the second FPC section, the third FPC section is attached to the third surface of the battery module body, and the first surface, the second surface and the third surface are mutually adjacent surfaces;

the signal acquisition sheet is arranged at the first FPC segment;

and the signal output interface is arranged at the third FPC segment.

2. The FPC clip of claim 1, wherein the folding direction of the second FPC segment relative to the first FPC segment is oblique to the length direction of the FPC board, and the folding direction of the third FPC segment relative to the second FPC segment is oblique to the length direction of the FPC board.

3. The FPC clip of claim 2, wherein the direction of the fold of the second FPC segment relative to the first FPC segment forms an angle of 45 ° with the length direction of the FPC board, and the direction of the fold of the third FPC segment relative to the second FPC segment forms an angle of 45 ° with the length direction of the FPC board.

4. The FPC clip of claim 1, wherein a groove is provided in a side of the first FPC segment facing the second surface, the first FPC segment including an "S" shaped connector therein, the "S" shaped connector being disposed in the groove, the "S" shaped connector including a first end portion and a second end portion, the first end portion being secured to a first side wall of the groove, the signal collection tab being secured to the second end portion.

5. The FPC collection device according to claim 4, wherein the cross section of the first FPC segment includes a first protective film layer, an FPC base material layer, a cover film layer, and a second protective film layer laminated in this order, the first protective film layer being located on a side of the first FPC segment adjacent to the battery module body, and one end portion of the signal collection sheet being fixed between the FPC base material layer and the cover film layer at the second end portion.

6. The FPC capture device of claim 5, wherein the second end is connected to a second side wall of the recess by a micro-connection segment, the second side wall being disposed opposite the first side wall.

7. The FPC collection device according to claim 5, wherein a positioning hole is provided in a side of the groove away from the S-shaped connector, the positioning hole penetrates through the first protective film layer, the FPC substrate layer, the cover film layer and the second protective film layer in sequence, and the positioning hole is used for a positioning column on the battery module body to penetrate through.

8. The FPC collection device according to claim 4, wherein the signal collection sheet includes a first signal collection sheet and a second signal collection sheet, the first signal collection sheet and the second signal collection sheet are sequentially connected along a length direction of the signal collection sheet, the first signal collection sheet is disposed on the first surface, an end portion of the first signal collection sheet, which is away from the second signal collection sheet, is fixed on the second end portion, the second signal collection sheet is formed after being bent with respect to the first signal collection sheet, the second signal collection sheet is attached to the second surface, and an end portion of the second signal collection sheet, which is away from the first signal collection sheet, is fixed on a busbar on the second surface.

9. The FPC capture device of claim 8, wherein a separation distance of a fold of the second signal capture segment when bent relative to the first signal capture segment from the second end is greater than or equal to a preset distance.

10. A battery module comprising a battery module body, and the FPC collection device according to any one of claims 1 to 9 for collecting a battery status signal in the battery module body.