Battery cell packaging and film folding device

Abstract

The utility model discloses a battery cell packaging and film folding device. The battery cell packaging and film folding device comprises a base, a film folding mechanism and a film folding mechanism, the jig is arranged on the base, an accommodating groove is formed in the jig, and the accommodating groove is used for accommodating part of the battery cell and the packaging film; the film folding mechanism is arranged on the base and located on one side of the jig, the film folding mechanism comprises a driving assembly and a compression roller assembly connected with the driving assembly, and the driving assembly is used for driving the compression roller assembly to push the part, exposed out of the containing groove in a protruding mode, of the packaging film to be folded and cover the top of the battery cell; the boss is arranged on the jig and located on one side of the containing groove, and the boss is used for guiding the compression roller assembly to the top of the battery cell. When the battery cell packaging film folding device is used for folding a packaging film, a pole piece in a battery cell cannot shift, so that the pole piece is not easy to rub, turn over and the like, and the production quality of the battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core packaging, in particular to a battery core packaging film folding device. Background Art

[0002] In the field of soft-pack batteries, packaging films (such as aluminum-plastic films) are usually used to encapsulate and seal the assembled batteries to protect the internal electrodes and isolate them from the external environment.

[0003] During the battery cell packaging process, the packaging film needs to be folded in half. The conventional packaging process is to first lay the packaging film on a jig with a receiving groove, then place the battery cell on the packaging film and drop it into the receiving groove of the jig at the same time, and then use the folding mechanism to push the packaging film from the folded corner to flip and fold it in half to cover the battery cell.

[0004] Due to the compact design of existing battery cells and the limited depth of the grooves in the jig, the thickness of the battery cell is greater than the depth of the grooves, causing the battery cell to protrude from the jig. When the film folding mechanism pushes the packaging film to flip in half, it moves from the side to the top of the battery cell at one end, which can easily push the battery cell and cause the internal electrode to shift, resulting in scratches and folding of the electrode, affecting the battery cell production quality. Utility Model Content

[0005] The main purpose of the utility model is to provide a battery cell packaging film folding device, which aims to solve the technical problem that the internal electrodes of the battery cell are easily displaced when the packaging film is folded in half.

[0006] To achieve the above-mentioned purpose, the present invention provides a battery cell packaging film folding device, which includes:

[0007] base;

[0008] A jig is provided on the base, wherein the jig is provided with a receiving groove for receiving part of the battery cell and the packaging film;

[0009] a film folding mechanism, disposed on the base and located on one side of the jig, the film folding mechanism comprising a drive assembly and a pressing roller assembly connected to the drive assembly, the drive assembly being configured to drive the pressing roller assembly to push the portion of the packaging film protruding from the accommodating groove to fold over the top of the battery cell;

[0010] A boss is provided on the jig and is located on one side of the accommodating groove, and the boss is used to guide the pressing roller assembly to the top of the battery core.

[0011] In some embodiments, the top surface of the boss is an outwardly convex arc surface; and / or,

[0012] The top of the boss is flush with or higher than the top of the battery cell.

[0013] In some embodiments, the boss is detachably connected to the jig.

[0014] In some embodiments, the battery cell packaging film folding device further includes a connecting assembly, and the driving assembly is detachably connected to the pressing roller assembly via the connecting assembly.

[0015] In some embodiments, the connecting assembly includes a connecting seat, two moving blocks, an adjusting member, and two connecting blocks, wherein the two moving blocks are disposed opposite to each other on the connecting seat;

[0016] The two connecting blocks are arranged opposite to each other and are respectively used to dock with the two moving blocks. One of the corresponding connecting block and the moving block is provided with a clamping hole, and the other is provided with a clamping column adapted to the clamping hole. Each connecting block is used to form a clamping fit with one of the moving blocks through the clamping hole and the clamping column.

[0017] The adjusting member is located on the connecting seat and is connected to the two moving blocks. The adjusting member is used to drive the two moving blocks to move so that the clamping column extends into or exits the clamping hole.

[0018] One of the driving assembly and the pressing roller assembly is connected to the connecting seat, and the other is connected to the two connecting blocks.

[0019] In some embodiments, the connecting block is provided with the clamping hole, and the moving block is provided with the clamping column.

[0020] In some embodiments, the adjusting member includes a screw rod, which is rotatably disposed on the connecting seat, and the screw rod has a first thread segment and a second thread segment with opposite thread directions. One of the two moving blocks is sleeved on the first thread segment of the screw rod and cooperates with the screw rod thread, and the other is sleeved on the second thread segment of the screw rod and cooperates with the screw rod thread.

[0021] In some embodiments, the connecting assembly further comprises a handwheel connected to one end of the screw rod.

[0022] In some embodiments, the pressure roller assembly includes a mounting frame, a bracket, a pressure roller and an elastic component, the mounting frame is connected to the driving component, the pressure roller is rotatably mounted on the bracket, and the bracket is connected to the mounting frame through the elastic component.

[0023] In some embodiments, the elastic component includes a connecting rod and a spring, the mounting frame is provided with a through hole adapted to the connecting rod, the connecting rod is movably inserted into the through hole in a vertical direction, one end of the connecting rod is connected to the bracket, and the other end is provided with a limiting portion, the diameter of the limiting portion being larger than the aperture of the through hole;

[0024] The spring is sleeved on the connecting rod, one end of the spring is connected to the limiting portion, and the other end is connected to the bracket.

[0025] When the battery cell packaging film folding device of the present invention is working, the battery cell is located on the packaging film and the two are placed in the accommodating groove of the jig at the same time. The accommodating groove accommodates part of the battery cell and the packaging film, and the driving component of the film folding mechanism drives the pressure roller assembly to push the part of the packaging film protruding from the accommodating groove to fold and cover the top of the battery cell. When the pressure roller assembly reaches the corner position of the packaging film for folding, it moves on the boss, and the boss guides the pressure roller assembly directly to the top of the battery cell, so that the pressure roller assembly can directly push the packaging film to flip, fold it in half and smooth it out during subsequent movement, avoiding pushing the battery cell, thereby preventing the internal electrode of the battery cell from shifting, making it less likely that the electrode will be scratched or folded, etc., which helps to improve the production quality of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a cell packaging film folding device in one embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A schematic structural diagram of a fixture containing a battery cell and a packaging film in an embodiment;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the disassembly of the jig, battery cell and packaging film in the embodiment;

[0029] Figure 4 for Figure 1 A schematic structural diagram of the film folding mechanism in the embodiment;

[0030] Figure 5 for Figure 1 A schematic diagram of the structure in which a driving component is connected to a portion of a connecting component in an embodiment;

[0031] Figure 6 for Figure 1 A schematic structural diagram of the connection between the pressure roller assembly and another part of the connecting assembly in the embodiment;

[0032] Description of Figure Numbers:

[0033] Label name Label name 100 base 200 Jig R Container 10 battery cells 20 packaging film 300 Folding mechanism 310 Drive components 320 Pressure roller assembly 400 boss 500 Connecting Components 510 Connector 520 Move Block 530 Adjustment parts 540 Connection Block 1 Card hole 2 Card column 550 handwheel 321 Mounting bracket 322 bracket 323 pressure roller 324 Elastic components 324a connecting rod 324b spring 324c Limiting part

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0038] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0039] The present invention provides a device for folding film of battery cell packaging, referring to Figures 1 to 3 , the battery cell packaging film folding device includes:

[0040] base 100;

[0041] The fixture 200 is disposed on the base 100 and has a receiving groove R formed therein for receiving a portion of the battery cells 10 and the packaging film 20;

[0042] The film folding mechanism 300 is disposed on the base 100 and located on one side of the jig 200. The film folding mechanism 300 includes a drive assembly 310 and a roller assembly 320 connected to the drive assembly 310. The drive assembly 310 is used to drive the roller assembly 320 to push the portion of the packaging film 20 protruding from the receiving groove R to fold over the top of the battery cell 10.

[0043] The boss 400 is disposed on the jig 200 and located at one side of the receiving groove R. The boss 400 is used to guide the pressing roller assembly 320 to the top of the battery cell 10 .

[0044] The cell packaging film folding device of the present invention is mainly used in the field of cell packaging, and realizes the film packaging of the cell 10 by folding the packaging film 20. The packaging film 20 can be an aluminum-plastic film.

[0045] In the battery cell packaging and film folding device, the base 100 serves as the foundational structure for mounting other components, such as the jig 200 and the film folding mechanism 300. The base 100 can be rectangular or other movable structures. The top surface of the base 100 serves as the mounting surface, where the jig 200 and film folding mechanism 300 are mounted.

[0046] The jig 200 secures the packaging film 20 and the battery cell 10. The recess R on the jig 200 aligns with the battery cell 10. During the folding process, the packaging film 20 and the battery cell 10 are positioned in the recess R. Specifically, the packaging film 20 is partially positioned within the recess R, while the remaining portion protrudes from the recess R. The battery cell 10 is positioned above the portion of the packaging film 20 that is within the recess R. This allows the portion of the packaging film 20 that protrudes from the recess R to flip toward the recess R and fold over the top of the battery cell 10, effectively encasing the battery cell 10 between the two folded portions of the packaging film 20.

[0047] The film folding mechanism 300 is located on one side of the jig 200. When the packaging film 20 is placed in the receiving groove R, the portion of the jig 200 protruding from the receiving groove R corresponds to the side of the jig 200 where the film folding mechanism 300 is located. That is, the side of the jig 200 where the film folding mechanism 300 is located corresponds to the corner of the packaging film 20 intended for folding. The film folding mechanism 300 functions to push the portion of the packaging film 20 protruding from the receiving groove R to flip over and cover the top of the battery cell 10, thereby folding the film. The film folding mechanism 300 primarily comprises a drive assembly 310 and a pressure roller assembly 320. The pressure roller assembly 320 is connected to the drive assembly 310 and can be driven by the drive assembly 310 to move. The drive assembly 310 may include a drive cylinder, which is mounted on the jig 200 via a mounting base. The drive cylinder's piston rod is connected to the pressure roller assembly 320, driving the pressure roller assembly 320 for reciprocal movement. Alternatively, the drive assembly 310 may utilize other linear drive modules, which are not limited in this embodiment. The pressure roller assembly 320 acts on the packaging film 20. The structural composition of the pressure roller assembly 320 will be further described in subsequent embodiments and will not be detailed here. Specifically, during the film folding process, the pressure roller assembly 320 of the film folding mechanism 300, driven by the drive assembly 310, moves to push the portion of the packaging film 20 protruding from the receiving groove R to fold over the top of the battery cell 10. Furthermore, after the packaging film 20 is folded, the pressure roller assembly 320 continues to move to smooth the packaging film 20.

[0048] The boss 400 is located on one side of the receiving groove R on the jig 200. Specifically, when the packaging film 20 is placed in the receiving groove R, the portion of the packaging film 20 protruding from the receiving groove R is located above the boss 400. The boss 400 guides the roller assembly 320 by supporting the roller assembly 320 to guide its movement. The boss 400 is an elongated strip extending along the width of the jig 200. The length of the boss 400 can be set to be equal to or greater than the width of the receiving groove R.

[0049] When the battery cell packaging film folding device of the present invention is working, the battery cell 10 is located on the packaging film 20 and both are placed in the receiving groove R of the jig 200 at the same time. The receiving groove R accommodates part of the battery cell 10 and the packaging film 20. The driving component 310 of the film folding mechanism 300 drives the pressure roller component 320 to push the part of the packaging film 20 protruding from the receiving groove R to be folded and cover the top of the battery cell 10.

[0050] Among them, when the pressure roller assembly 320 reaches the corner position of the packaging film 20 for folding, it moves on the corresponding boss 400, and the boss 400 guides the pressure roller assembly 320 directly to the top of the battery cell 10, so that the pressure roller assembly 320 can directly push the packaging film 20 to flip and fold it in half and smooth it out during subsequent movement, avoiding pushing the battery cell 10, and then preventing the internal electrode of the battery cell 10 from shifting, making it less likely for the electrode to be scratched, folded, etc., which helps to improve the production quality of the battery cell 10.

[0051] In some embodiments, reference Figure 2 and Figure 3 The top surface of the boss 400 is an outwardly convex arc surface. Specifically, when the pressure roller assembly 320 moves on the boss 400, it moves along the top surface of the boss 400. The outwardly convex arc surface of the top surface of the boss 400 can achieve a smooth transition of the movement of the pressure roller assembly 320, and the pressure roller assembly 320 will not get stuck during the movement, which can improve the smoothness of guiding the pressure roller assembly 320.

[0052] And / or, in some embodiments, with reference to Figure 2 , the top of the boss 400 is flush with or higher than the top of the battery cell 10. Specifically, the boss 400 has a certain height. When the battery cell 10 is placed on the jig 200, the top of the boss 400 can be flush with the top of the battery cell 10, or the top of the boss 400 can be higher than the top of the battery cell 10. The top of the boss 400 is not lower than the top of the battery cell 10. In this way, the pressure roller assembly 320 moves along the boss 400, and the boss 400 can directly guide the pressure roller assembly 320 smoothly to the top of the battery cell 10 without pushing the battery cell 10 on the side of the battery cell 10, thereby preventing the internal pole piece of the battery cell 10 from shifting. Among them, when the top of the boss 400 is higher than the top of the battery cell 10, the height difference between the two can be set according to actual conditions, such as 1mm or 2mm, etc., and there is no limitation on this.

[0053] In some embodiments, the boss 400 is detachably connected to the jig 200. The detachable connection between the boss 400 and the jig 200 may be a screw connection. In addition, the boss 400 may also be detachably provided on the jig 200 via a snap-fit ​​structure, a magnetic structure, or the like. In this embodiment, the boss 400 is detachable from the jig 200. The user can select a boss 400 with a height that matches the specifications of the battery cell 10 and install it on the jig 200. This allows the battery cell packaging and folding device to be applicable to packaging and folding batteries 10 of various specifications and sizes, and has high versatility.

[0054] In some embodiments, reference Figure 1 and Figure 4The cell packaging folding device also includes a connecting component 500, through which the driving component 310 is detachably connected to the pressure roller component 320. In this embodiment, the driving component 310 and the pressure roller component 320 are detachably connected by the connecting component 500. Optionally, the connecting component 500 includes a first connecting part and a second connecting part, the driving component 310 is connected to the first connecting part, and the pressure roller component 320 is connected to the second connecting part, and the first connecting part and the second connecting part are detachably connected. The detachable connection between the first connecting part and the second connecting part can be a snap connection, a screw connection, etc., which is not limited. By connecting the first connecting part and the second connecting part of the connecting component 500, the connection between the pressure roller component 320 and the driving component 310 can be achieved; conversely, by separating the first connecting part and the second connecting part of the connecting component 500, the pressure roller component 320 and the driving component 310 can be detached. In a specific application, if any one of the driving assembly 310 and the pressure roller assembly 320 fails or is abnormal, it can be removed accordingly for repair or replacement, which is convenient to use.

[0055] The structure of the connecting component 500 may be:

[0056] In some embodiments, reference Figures 4 to 6 The connecting assembly 500 includes a connecting base 510, two moving blocks 520, an adjusting member 530 and two connecting blocks 540, wherein the two moving blocks 520 are relatively arranged on the connecting base 510;

[0057] The two connecting blocks 540 are arranged opposite to each other and are respectively used to connect with the two moving blocks 520. One of the corresponding connecting block 540 and the moving block 520 is provided with a locking hole 1, and the other is provided with a locking column 2 adapted to the locking hole 1. Each connecting block 540 is used to form a locking fit with a moving block 520 through the locking hole 1 and the locking column 2.

[0058] The adjusting member 530 is located on the connecting seat 510 and is connected to the two moving blocks 520. The adjusting member 530 is used to drive the two moving blocks 520 to move so that the clamping column 2 extends into or out of the clamping hole 1;

[0059] One of the driving assembly 310 and the pressing roller assembly 320 is connected to the connecting seat 510 , and the other is connected to the two connecting blocks 540 .

[0060] In this embodiment, the drive assembly 310 may be connected to the connecting base 510, and the pressure roller assembly 320 may be connected to the two connecting blocks 540; alternatively, the pressure roller assembly 320 may be connected to the connecting base 510, and the drive assembly 310 may be connected to the two connecting blocks 540. Furthermore, for any corresponding connecting block 540 and movable block 520, the connecting block 540 may be provided with a latching hole 1, and the movable block 520 may be provided with a latching post 2; alternatively, the movable block 520 may be provided with a latching hole 1, and the connecting block 540 may be provided with a latching post 2.

[0061] Preferably, the drive assembly 310 is connected to the connecting base 510, the pressure roller assembly 320 is connected to the two connecting blocks 540, and the connecting blocks 540 are provided with a locking hole 1, and the movable block 520 is provided with a locking column 2. This example is used for description. It should be noted that the locking column 2 provided on the movable block 520 can be located on the side of the movable block 520 facing the other movable block 520, and the locking hole 1 on the connecting block 540 can be a through hole.

[0062] Among them, the two moving blocks 520 can be slidably arranged on the connecting seat 510 through a slide rail structure, and the adjusting member 530 can be used to drive the two moving blocks 520 to move toward or away from each other. For example, when the parts of the connecting assembly 500 need to be engaged, the two moving blocks 520 are driven to move toward each other (close to each other) through the adjusting member 530; when the parts of the connecting assembly 500 need to be disassembled, the two moving blocks 520 are driven to move away from each other (in principle) through the adjusting member 530. The adjusting member 530 can be set as one or more, for example, there are two adjusting members 530, and each adjusting member 530 is used to drive one moving block 520 to move. The structural form of the adjusting member 530 can adopt various forms, such as a screw rod, a gear rack module, etc., and this embodiment does not limit this.

[0063] The connection and disassembly principles of the connection assembly 500 are as follows:

[0064] When connection is required, first align the clamping holes 1 on the two connecting blocks 540 with the clamping columns 2 on the two movable blocks 520, and then drive the two movable blocks 520 to move toward each other on the connecting seat 510 by controlling the adjustment member 530, so that the clamping columns 2 on the two movable blocks 520 extend into the clamping holes 1 on the two connecting blocks 540 to form a clamping fit respectively, thereby realizing the connection of the components of the connecting assembly 500, so that the driving assembly 310 is connected to the pressure roller assembly 320.

[0065] When disassembly is required, the two movable blocks 520 are driven to move backwards on the connecting seat 510 by controlling the adjusting member 530, so that the clamping columns 2 on the two movable blocks 520 are correspondingly withdrawn from the clamping holes 1 on the two connecting blocks 540 to release the clamping fit respectively, thereby realizing the disassembly of the components of the connecting assembly 500, thereby separating the driving assembly 310 from the pressure roller assembly 320.

[0066] By adopting the structural composition of the connecting assembly 500 of this embodiment, the driving assembly 310 and the pressing roller assembly 320 can be connected or separated easily and conveniently.

[0067] In some embodiments, reference Figure 5 and Figure 6 The connecting block 540 is provided with a latching hole 1, and the moving block 520 is provided with a latching post 2. Specifically, the connecting block 540 and the moving block 520 are in an aligned state. When the moving block 520 moves toward the connecting block 540, the latching post 2 on the moving block 520 can be correspondingly extended into the latching hole 1 of the connecting block 540 to form a latching fit; when the moving block 520 moves away from the connecting block 540, the latching post 2 on the moving block 520 withdraws from the latching hole 1 of the connecting block 540 to release the latching fit.

[0068] In some embodiments, reference Figure 4 and Figure 5 The adjusting member 530 includes a screw, which is rotatably mounted on the connecting base 510. The screw has a first threaded section and a second threaded section with opposite thread directions. One of the two movable blocks 520 is sleeved on the first threaded section of the screw and engages with the screw thread, while the other is sleeved on the second threaded section of the screw and engages with the screw thread. In this embodiment, because the two movable blocks 520 are respectively threadedly engaged with the first and second threaded sections of the screw, when the screw rotates in a first direction, the two movable blocks 520 move toward each other along the screw; and when the screw rotates in a second direction, the two movable blocks 520 move away from each other along the screw. The first direction and the second direction are opposite. Optionally, the first direction is clockwise and the second direction is counterclockwise; or alternatively, the first direction is counterclockwise and the second direction is clockwise. Therefore, the user can control the rotation of the screw to connect or disconnect the drive assembly 310 from the pressure roller assembly 320.

[0069] In some embodiments, reference Figure 4 and Figure 5 The connecting assembly 500 further includes a hand wheel 550, which is connected to one end of the screw rod. The user can rotate the hand wheel 550 to drive the screw rod to rotate, which is simple to operate and easy to use.

[0070] In some embodiments, reference Figure 4 and Figure 6The pressure roller assembly 320 includes a mounting frame 321, a bracket 322, a pressure roller 323, and an elastic component 324. The mounting frame 321 is connected to the driving component 310. The pressure roller 323 is rotatably mounted on the bracket 322. The bracket 322 is connected to the mounting frame 321 via the elastic component 324. In this embodiment, the mounting frame 321 can be a long strip frame, and the cross-sectional shape of the mounting frame 321 is L-shaped. The bracket 322 is generally U-shaped. The pressure roller 323 is arranged between the two ends of the bracket 322 and is rotatably connected to the bracket 322. The elastic component 324 is arranged between the bracket 322 and the mounting frame 321 and connects the bracket 322 to the mounting frame 321. Due to the elastic component 324, the bracket 322 can move elastically on the mounting frame 321, thereby driving the pressure roller 323 to move elastically up and down.

[0071] During film folding, the drive assembly 310 drives the mounting bracket 321 to move the bracket 322, which in turn drives the pressure roller 323 mounted thereon. The pressure roller 323 applies pressure to the packaging film 20 and rolls over it, smoothing it. Furthermore, the elastic component 324 ensures that the pressure roller 323 maintains elastic contact with the packaging film 20 during the smoothing process, preventing damage to the film 20 caused by hard contact and improving film folding quality. Furthermore, when in contact with the boss 400, the pressure roller 323 can move relative to the boss 400 to adapt to its position and height, eliminating the need for additional drive and regulation by the drive assembly 310, ensuring flexible use.

[0072] The elastic component 324 may be structured as follows:

[0073] In some embodiments, reference Figure 6 The elastic component 324 includes a connecting rod 324a and a spring 324b. A through hole adapted to the connecting rod 324a is opened on the mounting frame 321. The connecting rod 324a is movably inserted into the through hole along the vertical direction. One end of the connecting rod 324a is connected to the bracket 322, and the other end is provided with a limiting portion 324c. The diameter of the limiting portion 324c is larger than the aperture of the through hole.

[0074] The spring 324 b is sleeved on the connecting rod 324 a , one end of the spring 324 b is connected to the limiting portion 324 c , and the other end of the spring 324 b is connected to the bracket 322 .

[0075] Specifically, when the pressure roller 323 is subjected to an external force (e.g., the pressure roller 323 contacts the boss 400 and is subjected to a reaction force from the boss 400), the bracket 322 is driven to move upward, and the connecting rod 324a connected to the bracket 322 is correspondingly raised along the through hole of the mounting frame 321. During the rising process of the connecting rod 324a, the limiting portion 324c correspondingly extends the spring 324b, causing the spring 324b to accumulate elastic potential energy. When the external force on the pressure roller 323 is removed, the spring 324b releases the elastic potential energy and correspondingly shortens, thereby pulling the limiting portion 324c and driving the connecting rod 324a to descend along the through hole of the mounting frame 321. During the descent of the connecting rod 324a, the bracket 322 connected to the connecting rod 324a is correspondingly lowered, so that the pressure roller 323 descends and returns to its original position. The connecting rod 324a may be a bolt.

[0076] As an optional solution, multiple elastic components 324 can be provided, and the multiple elastic components 324 are arranged in sequence along the length direction of the pressure roller 323. The spacing between any two adjacent elastic components 324 is equal, and the multiple elastic components 324 are evenly arranged, so that each position of the pressure roller 323 applies more uniform force to the packaging film 20 when smoothing it, thereby achieving a better smoothing effect.

[0077] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A cell packaging film folding device, characterized in that: include: base; A jig is provided on the base, wherein the jig is provided with a receiving groove for receiving part of the battery cell and the packaging film; a film folding mechanism, disposed on the base and located on one side of the jig, the film folding mechanism comprising a drive assembly and a pressing roller assembly connected to the drive assembly, the drive assembly being configured to drive the pressing roller assembly to push the portion of the packaging film protruding from the accommodating groove to fold over the top of the battery cell; A boss is provided on the jig and is located on one side of the accommodating groove, and the boss is used to guide the pressing roller assembly to the top of the battery core.

2. The cell packaging film folding device according to claim 1, characterized in that: The top surface of the boss is an outwardly convex arc surface; and / or, The top of the boss is flush with or higher than the top of the battery core.

3. The cell packaging film folding device according to claim 1, characterized in that: The boss is detachably connected to the jig.

4. The cell packaging film folding device according to claim 1, characterized in that: The battery cell packaging film folding device also includes a connecting component, and the driving component is detachably connected to the pressing roller component through the connecting component.

5. The battery cell packaging film folding device according to claim 4, characterized in that: The connecting assembly includes a connecting seat, two moving blocks, an adjusting member and two connecting blocks, wherein the two moving blocks are arranged on the connecting seat opposite to each other; The two connecting blocks are arranged opposite to each other and are respectively used to dock with the two moving blocks. One of the corresponding connecting block and the moving block is provided with a clamping hole, and the other is provided with a clamping column adapted to the clamping hole. Each connecting block is used to form a clamping fit with one of the moving blocks through the clamping hole and the clamping column. The adjusting member is located on the connecting seat and is connected to the two moving blocks. The adjusting member is used to drive the two moving blocks to move so that the clamping column extends into or exits the clamping hole. One of the driving assembly and the pressing roller assembly is connected to the connecting seat, and the other is connected to the two connecting blocks.

6. The battery cell packaging film folding device according to claim 5, characterized in that: The connecting block is provided with the clamping hole, and the moving block is provided with the clamping column.

7. The battery cell packaging film folding device according to claim 5, characterized in that: The adjusting member includes a screw rod, which is rotatably arranged on the connecting seat. The screw rod has a first thread segment and a second thread segment with opposite thread directions. One of the two moving blocks is sleeved on the first thread segment of the screw rod and cooperates with the screw rod thread, and the other is sleeved on the second thread segment of the screw rod and cooperates with the screw rod thread.

8. The battery cell packaging film folding device according to claim 7, characterized in that: The connecting assembly further comprises a handwheel connected to one end of the screw rod.

9. The battery cell packaging film folding device according to any one of claims 1 to 8, characterized in that: The pressure roller assembly includes a mounting frame, a bracket, a pressure roller and an elastic component. The mounting frame is connected to the driving component. The pressure roller is rotatably mounted on the bracket. The bracket is connected to the mounting frame through the elastic component.

10. The battery cell packaging film folding device according to claim 9, characterized in that: The elastic component includes a connecting rod and a spring. The mounting frame is provided with a through hole adapted to the connecting rod. The connecting rod is movably inserted into the through hole in a vertical direction. One end of the connecting rod is connected to the bracket, and the other end is provided with a limiting portion. The diameter of the limiting portion is larger than the aperture of the through hole. The spring is sleeved on the connecting rod, one end of the spring is connected to the limiting portion, and the other end is connected to the bracket.

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