Clamping tool and battery cell film pasting device

Abstract

The utility model relates to a clamping tool and a battery cell film pasting device. The clamping tool comprises a first support, a second support, a rotating assembly and a clamping assembly, the rotating assembly is rotatably erected between the first support and the second support, the clamping assembly is fixedly arranged on the rotating assembly and can rotate along with the rotating assembly, and the clamping assembly is used for clamping the battery cell; when the rotating assembly rotates, the clamping assembly is provided with a first station, a second station, a third station and a fourth station in the circumferential direction of the rotating assembly, and the four stations are applied to feeding code scanning, end face film pasting, film paper long edge hot rolling and film paper corner turning rolling of the battery cells correspondingly. The clamping tool provided by the utility model is small in occupied space and good in film pasting effect.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to a film sticking device for clamping tooling and a battery core. Background Art

[0002] In the coating process of the battery cell, after wrapping the large surface film, the end face of the battery cell also needs to be coated with film to ensure that no white or aluminum is leaked after the battery cell is coated, and to ensure the insulation requirements of the battery cell after coating.

[0003] When applying film to the end faces of battery cells, multiple processes such as film application, long side and short side rolling need to be carried out in sequence, and each process needs to be completed in a specific tooling position with corresponding equipment. In the prior art, the combination of multiple processes makes the entire tooling more complicated and occupies a larger area. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a film-sticking device for clamping tooling and a battery cell.

[0005] According to a first aspect of the utility model, a clamping tool is provided, which is applied to battery cell film lamination, comprising:

[0006] A first bracket, a second bracket, a rotating assembly and a clamping assembly, wherein the rotating assembly is rotatably mounted between the first bracket and the second bracket, the clamping assembly is fixedly arranged on the rotating assembly and can rotate with the rotating assembly, and the clamping assembly is used to clamp the battery cell;

[0007] When the rotating component rotates, the clamping component has a first station, a second station, a third station and a fourth station along the circumference of the rotating component, and the four stations are respectively used for loading and scanning the battery cells, end face film pasting, long edge hot rolling of the film paper, and angle rolling of the film paper.

[0008] Optionally, the first station, the second station, the third station and the fourth station are respectively distributed in a cross shape along the circumference of the rotating component, and are sequentially used for the material loading and code scanning, end face film laminating, film paper long edge hot rolling and film paper corner turning rolling, and the first station is located directly above the rotating component.

[0009] Optionally, the clamping assemblies are provided with four groups, and the four groups of the clamping assemblies are distributed in a cross shape around the circumference of the rotating assembly. When one group of the clamping assemblies is located at the first station, the remaining clamping assemblies are located at the second station, the third station and the fourth station respectively.

[0010] Optionally, the rotating assembly includes a rotating shaft, and the clamping assembly is provided in two groups, the two groups of the clamping assemblies are respectively provided at two ends of the rotating shaft, and the distance between the two groups of the clamping assemblies along the axial direction of the rotating shaft is adjustable.

[0011] Optionally, the rotating assembly further comprises a mounting frame, which is arranged on the rotating shaft and has a plurality of mounting positions evenly arranged along the axial direction of the rotating shaft, and the two groups of the clamping assemblies are respectively and detachably arranged at the mounting positions at different locations.

[0012] Optionally, a code scanning component is further included, and the code scanning component is arranged at at least one end of the loading code scanning station, and the code scanning component is used to scan the parameter information of the battery cell.

[0013] Optionally, the rotating assembly includes a rotating shaft, and the clamping tool further includes:

[0014] A driving member, wherein the driving member is disposed on the first bracket, and an output end of the driving member is connected to the first end of the rotating shaft, and is used to drive the rotating shaft to rotate;

[0015] An electric slip ring, wherein the stator of the electric slip ring is fixed on the second bracket, and the rotor of the electric slip ring is connected to the second end of the rotating shaft;

[0016] The rotating shaft is a hollow structure, and the wire of the driving member can be routed through the hollow structure and the electric slip ring and connected to an external power source.

[0017] Optionally, the clamping assembly includes two pneumatic clamping jaws arranged opposite to each other, and the clamping assembly can be connected to an external air source to open or clamp the two clamping jaws, and the air channel of the air source can pass through the electric slip ring and the hollow structure.

[0018] Optionally, it also includes a return-to-zero baffle and a photoelectric sensor;

[0019] The return-to-zero baffle is disposed at the first end of the rotating shaft, and the photoelectric sensor is disposed at a position on the first bracket corresponding to the return-to-zero baffle, and can detect the number of revolutions of the rotating shaft through the return-to-zero baffle;

[0020] When the photoelectric sensor detects that the number of revolutions of the rotating shaft reaches a set value, the driving member can return to its original position.

[0021] According to a second aspect of the utility model, a film pasting device for a battery cell is provided, comprising a film taking and pasting mechanism, a long side rolling and hot pressing mechanism, a film paper corner turning and rolling mechanism, and the clamping tooling described in the first aspect;

[0022] Among them, the film taking and pasting mechanism is used to load the battery cell and apply film to the end surface of the battery cell, the long side rolling and hot pressing mechanism is used to roll the long side of the film and hot press the end surface, and the film paper corner rolling mechanism is used to roll the corner of the film.

[0023] One technical effect of the utility model is that the utility model sets a clamping assembly on the rotating assembly, so that when the battery cell is subjected to the four processes of loading and scanning, end face film laminating, long side hot rolling of the film paper, and corner rolling of the film paper, the rotating assembly can rotate to enable the clamping assembly to complete the laminating process of the above four stations in the axial direction of the rotating assembly, thereby reducing the space occupied by the entire equipment in the horizontal direction. In addition, the hot pressing process is carried out simultaneously during the long side rolling process of the film paper, thereby improving the film laminating effect of the end face of the battery cell.

[0024] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0026] Figure 1 The utility model is a structural schematic diagram of a clamping tool provided by the utility model.

[0027] Figure 2 yes Figure 1 main view.

[0028] Figure 3 This is one of the structural schematic diagrams of a battery cell film sticking device provided by the utility model.

[0029] Figure 4 yes Figure 3 Side view of.

[0030] Figure 5 The utility model is a structural schematic diagram of a battery cell after the material loading and film laminating process.

[0031] Figure 6 The utility model is a structural schematic diagram of a film taking and sticking mechanism provided by the utility model.

[0032] Figure 7 It is a structural schematic diagram of a long-side roller pressing and hot pressing mechanism provided by the utility model.

[0033] Figure 8 The utility model is a structural schematic diagram of a film paper corner turning roller pressing mechanism.

[0034] Description of reference numerals:

[0035] 100. Clamping tool; 1. First bracket; 2. Second bracket; 3. Rotating shaft; 4. Mounting position; 5. Clamping assembly; 6. Barcode scanning assembly; 7. Driving member; 8. Photoelectric sensor; 9. Electric slip ring; 10. Zero return baffle;

[0036] 200, film taking and pasting mechanism; 201, second station;

[0037] 300, long side roller pressing and hot pressing mechanism; 301, third station; 302, long side roller pressing wheel; 303, heating silica gel; 304, resistance wire;

[0038] 400, film paper corner turning roller pressing mechanism; 401, fourth station;

[0039] 500, battery cell; 501, film paper; 502, long side; 503, short side. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0042] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] like Figures 1 to 8As shown, according to one aspect of the utility model, there is provided a clamping tool 100, which is applied to the film pasting of the battery cell 500, comprising: a first bracket 1, a second bracket 2, a rotating assembly and a clamping assembly 5, wherein the rotating assembly is rotatably mounted between the first bracket 1 and the second bracket 2, the clamping assembly 5 is fixedly arranged on the rotating assembly and can rotate with the rotating assembly, and the clamping assembly 5 is used to clamp the battery cell 500; when the rotating assembly rotates, the clamping assembly 5 has a first station, a second station 201, a third station 301 and a fourth station 401 along the circumference of the rotating assembly, and the four stations are respectively applied to one of the loading and scanning of the battery cell 500, the film pasting of the end surface, the hot rolling of the long side 502 of the film paper 501 and the corner rolling of the film paper 501.

[0046] Specifically, the clamping fixture 100 provided in this embodiment can be used in the process of film pasting at the end of the battery cell 500. The clamping fixture 100 includes a rotating assembly. During the rotation of the rotating assembly, the clamping assembly 5 arranged on the rotating assembly rotates around the rotating assembly at the same time, so that the clamping assembly 5 can have a first station, a second station 201, a third station 301 and a fourth station 401 in the axial direction of the rotating assembly, which are respectively used to realize the processes of loading and scanning the battery cell 500, film pasting on the end surface, hot rolling of the long side 502 of the film paper 501 and corner rolling of the film paper 501. By combining the various processes in the same vertical direction, the mode of setting the stations in sequence along the horizontal direction in the prior art is avoided, which greatly saves the horizontal layout space, and other equipment used to match the operation of each process can also be concentrated at the same position at the same time, further reducing the equipment footprint. Among them, the rotating assembly can include a rotating shaft 3 and a bracket and other structural parts on the rotating shaft 3 for installing equipment, and the utility model does not limit this.

[0047] In the above structure, the corresponding operating mechanism can be adapted to the specific processes of the first station, the second station 201, the third station 301 and the fourth station 401, and the specific operating process of each station can be designed according to actual needs. For example, in one embodiment, the first station, the second station 201, the third station 301 and the fourth station 401 are sequentially used for loading and scanning of the battery cell 500, end film pasting, hot rolling of the long side 502 of the film paper 501 and corner rolling of the film paper 501. Then, the first station is matched with a loading and scanning device, the second station 201 is matched with a film removal device, the third station 301 is provided with a long side 502 rolling and end cover hot pressing equipment, and the fourth station 401 can be provided with a corner rolling device, and the fourth station 401 can also be provided with a material unloading device. The specific location of the above equipment is designed according to actual needs, and some functional equipment can be integrated into one according to actual needs, for example, the equipment used for rolling the long edge 502 and hot pressing the end cover can be integrated into one to further save occupied space.

[0048] In the above embodiment, during the loading and scanning process, since the battery cells 500 usually have different models and sizes, the scanning process can identify the "identity" information (such as a QR code) of the battery cells 500, so as to facilitate the verification of the model and other information of the battery cells 500. In addition, during the process of rolling the long side 502, the end face of the battery is also subjected to heat pressing treatment, so that the colloid of the film paper 501 pasted on the end face is softened, the bonding reliability of the film paper 501 is improved, and the problem of warping at the window hole position after rolling the long side 502 and the corner rolling is avoided, thereby improving the film pasting effect.

[0049] Alternatively, if Figures 1 to 4 As shown, the first station, the second station 201, the third station 301 and the fourth station 401 are respectively distributed in a cross shape along the circumference of the rotating component, and are sequentially used for the material loading and scanning, end face film laminating, hot rolling of the long side 502 of the film paper 501 and corner rolling of the film paper 501. The first station is located directly above the rotating component.

[0050] Specifically, in this embodiment, the four workstations are distributed in a cross shape, that is, at the upper, lower, left and right positions of the rotating component, they are respectively located in the working areas of each process. In practical applications, the loading and scanning process is performed directly above the rotating component, the end face film pasting and the film paper 501 corner turning and rolling process are performed on the left or right side, and the long side 502 hot rolling process of the film paper 501 is performed directly below. Among them, the left and right sides are specifically the end face film pasting and the film paper 501 corner turning and rolling process, which can be set according to the rotation direction of the rotating component, and the utility model does not limit this. In this setting, on the one hand, the working areas between each process are appropriately spaced, and they will neither affect each other nor affect the film pasting efficiency due to the distance being too far. In addition, the loading and scanning is set directly above the rotating component, which makes the loading process easier, and the battery cell 500 will not be hit or interfered by other equipment during the loading process. Finally, the material is unloaded on the side of the rotating component, which is also convenient for the movement of the battery cell 500 after the film is coated.

[0051] Alternatively, if Figures 1 to 4 As shown, the clamping assemblies 5 are provided with four groups, and the four groups of the clamping assemblies 5 are distributed in a cross shape around the circumference of the rotating assembly. When one group of the clamping assemblies 5 is located at the first station, the remaining clamping assemblies 5 are located at the second station 201, the third station 301 and the fourth station 401 respectively.

[0052] Specifically, in this embodiment, four groups of clamping components 5 are arranged, which are respectively distributed in a cross shape around the circumference of the rotating component, so that during the production process, at most four battery cells 500 can be film-laminated at one time. That is, while the first battery cell 500 is loaded and scanned at the first station, the second battery cell 500, the third battery cell 500 and the fourth battery cell 500 can be film-laminated at the second station 201, the third station 301 and the fourth station 401, respectively, to improve the film-laminated efficiency.

[0053] Alternatively, if Figures 1 to 3 As shown, the rotating assembly includes a rotating shaft 3, and the clamping assembly 5 is provided with two groups, the two groups of the clamping assembly 5 are respectively arranged at the two ends of the rotating shaft 3, and the distance between the two groups of the clamping assembly 5 along the axial direction of the rotating shaft 3 is adjustable.

[0054] Specifically, in actual applications, the shape of the battery cell 500 is usually a long strip, and two groups of clamping components 5 with adjustable distance are set at both ends of the rotating shaft 3. On the one hand, the clamping component 5 can clamp the battery more stably, so that the battery cell 500 is not prone to shaking or falling during operation, thereby improving the quality of film pasting. On the other hand, the distance between the two groups of clamping components 5 can be adjusted according to the length of the battery cell 500, so that the clamping tool 100 can be applied to more models of battery cell 500 film pasting operations, thereby improving the adaptability of the equipment.

[0055] In the above structure, the distance adjustment between the two groups of clamping assemblies 5 can be completed manually, or by electric control or other control forms. For example, a slide rail can be set on the rotating shaft 3 so that when the distance needs to be adjusted, the two groups of clamping assemblies 5 can be controlled to move relative to or away from each other. In practical applications, the clamping assembly 5 and the rotating shaft 3 are designed to be detachable, which is convenient for adjusting the distance and for maintenance and disassembly.

[0056] Alternatively, if Figure 1 to Figure 2 As shown, the rotating assembly also includes a mounting frame, which is arranged on the rotating shaft 3 and has a plurality of mounting positions 4 evenly arranged along the axial direction of the rotating shaft 3. The two groups of clamping assemblies 5 are detachably arranged at different mounting positions 4.

[0057] Specifically, in this embodiment, the mounting frame is arranged on the rotating shaft 3, and the mounting frame is provided with a plurality of mounting positions 4 in the axial direction of the rotating shaft 3. When the distance between the clamping assemblies 5 needs to be adjusted, the clamping assembly 5 can be disassembled from one mounting position 4 and assembled to a suitable mounting position 4. The mounting position 4 can be directly designed on the rotating shaft 3, or it can be completed by providing a separate bracket on the rotating shaft 3. The clamping assembly 5 can be detachably connected to the mounting position 4 by fasteners such as bolts. In one embodiment, the clamping assembly 5 can be provided in eight groups, and each four groups are distributed in a cross shape around the circumference of the rotating shaft 3, which not only improves the film pasting efficiency, but also improves the film pasting quality.

[0058] Alternatively, if Figures 1 to 4 As shown, the clamping station also includes a code scanning component 6, and the code scanning component 6 is arranged at at least one end of the loading and scanning station, and the code scanning component 6 is used to scan the parameter information of the battery cell 500.

[0059] Specifically, in this embodiment, by setting a code scanning component 6 at the end of the rotating shaft 3, the model information of the battery cell 500 can be obtained, and then the adaptive film pasting operation can be performed. In addition, the model information of the battery cell 500 is usually marked on the end face of the battery cell 500. During the end face film pasting process, the film paper 501 will cover this information. After the code scanning component 6 obtains the information, it is also convenient to spray the model information of the battery cell 500 on the film paper 501 again after the film pasting is completed.

[0060] According to actual needs, the code scanning component 6 can be provided in one or two groups. When two groups are provided, they are respectively provided at both ends of the rotating shaft 3 at the loading code scanning station to adapt to different types of battery cells 500. The code scanning component 6 is usually composed of a camera and a software control module, which will not be described in detail in the utility model.

[0061] Alternatively, if Figure 1 to Figure 2 As shown, the rotating assembly includes a rotating shaft 3, and the clamping tool also includes a driving member 7 and an electric slip ring 9. The driving member 7 is arranged on the first bracket 1, and the output end of the driving member 7 is connected to the first end of the rotating shaft 3, so as to drive the rotating shaft 3 to rotate; the stator of the electric slip ring 9 is fixed on the second bracket 2, and the rotor of the electric slip ring 9 is connected to the second end of the rotating shaft 3; the rotating shaft 3 is a hollow structure, and the wire of the driving member 7 can be routed through the hollow structure and the electric slip ring 9, and connected to an external power supply.

[0062] Specifically, in this embodiment, the rotation of the rotating shaft 3 is realized by the driving member 7, and the other end is mounted between the first bracket 1 and the second bracket 2 through the electric slip ring 9. The rotating shaft 3 is designed as a hollow structure, so that the external connection wire of the driving member 7 can be stored in the rotating shaft 3 and extended to the outside of the device through the electric slip ring 9, which improves the aesthetics of the device on the one hand, and avoids interference between other external devices and the wires on the other hand, thereby improving the reliability and safety of the device. When the driving member 7 controls the rotating shaft 3 to rotate, the stator of the electric slip ring 9 does not move, and the rotor rotates with the rotating shaft 3.

[0063] Alternatively, if Figures 1 to 4 As shown, the clamping assembly 5 includes two pneumatic clamping jaws arranged opposite to each other, and the clamping assembly 5 can be connected to an external air source to open or clamp the two clamping jaws, and the air channel of the air source can pass through the electric slip ring 9 and the hollow structure.

[0064] Specifically, in this embodiment, the clamping assembly 5 is driven by a pneumatic source to clamp the battery cell 500. The pneumatic source is used to control the clamping and opening of the clamping assembly 5, which can ensure that the battery cell 500 is clamped more firmly. A suction cup can also be provided on the pneumatic clamp to further improve the stability and safety of the clamping of the battery cell 500. In addition, the ventilation pipes connected to the air source can be provided in the hollow structure of the rotating shaft 3 to avoid pipe wear and the aesthetics of the equipment.

[0065] Alternatively, if Figure 1 to Figure 2 As shown, the clamping tool 100 also includes a return-to-zero baffle 10 and a photoelectric sensor 8; the return-to-zero baffle 10 is arranged at the first end of the rotating shaft 3, and the photoelectric sensor 8 is arranged at a position on the first bracket 1 corresponding to the return-to-zero baffle 10, and the number of revolutions of the rotating shaft 3 can be detected through the return-to-zero baffle 10; when the photoelectric sensor 8 obtains that the number of revolutions of the rotating shaft reaches a set value, the driving member can return to its original state.

[0066] Specifically, in practical applications, the driving member can be selected as a motor, and the motor is connected to the rotating shaft through a reducer. When the number of revolutions of the motor is large, the transmission between the reducer and the motor will cause cumulative errors. A return-to-zero baffle 10 and a photoelectric sensor 8 are provided so that when the motor rotates to a set number of times, the motor can be controlled to return to the rotation origin of the device, thereby optimizing the cumulative error in the program and improving the operation accuracy. In one embodiment, the motor can be set to return to the original position once every 2000r of rotation of the rotating shaft 3. According to the second aspect of the utility model, Figures 1 to 8As shown, a film pasting device for a battery cell 500 is provided, comprising a film taking and pasting mechanism 200, a long side rolling and hot pressing mechanism 300, a film paper corner turning rolling mechanism 400 and the clamping tool 100 described in the first aspect; wherein the film taking and pasting mechanism 200 is used to load the battery cell 500 and to apply film to the end surface of the battery cell 500, the long side rolling and hot pressing mechanism 300 is used to roll the long side 502 of the film and to hot press the end surface, and the film paper corner turning rolling mechanism 400 is used to roll the corner of the film.

[0067] Specifically, in this embodiment, after the battery cell 500 is loaded at the first station, that is, after being clamped and fixed by the clamping component 5 and the model information is identified by scanning the code, when it rotates to the second station 201 with the rotating component, the film-taking mechanism 200 is used to take the matching film paper 501 according to the model and other information of the battery cell 500, and attach the film paper 501 to the end of the battery cell 500, refer to Figure 5 Subsequently, when the battery cell 500 rotates to the third station 301 along with the rotating assembly, the long-side rolling and hot pressing mechanism 300 rolls the long side 502 of the film paper 501 on the end surface of the battery through the long-side rolling wheel 302, so that the long side 502 is covered on the battery cell 500. In addition, the end surface of the battery cell 500 is heated by heating the silica gel 303 and the resistance wire 304, so that the colloid of the film paper 501 on the end surface of the battery cell 500 is softened, so as to improve the firmness of the film paper 501 and avoid the problem of the film paper 501 warping at the window hole position. Figure 7 Finally, the rotating assembly rotates to the fourth station 401, and the film paper corner rolling mechanism 400 rolls and folds the corner (short side 503) of the film paper 501, so that the end faces of the battery are all coated, ensuring that the battery cell 500 does not leak white or aluminum, and ensuring the insulation requirements of the battery cell 500 after coating.

[0068] In the above film pasting operation, refer to Figure 6 The film taking and pasting mechanism 200 is provided with a pair of film taking and sucking plates for sucking the film paper 501. When the film paper 501 and the battery cell 500 are in place, the camera is used to take pictures respectively, and the coordinate difference between the two is compared. The software guides the deviation correction to the right position for pasting, so that the film pasting accuracy is higher. Among them, the film taking and sucking plates can be designed in various models and equipped with a quick-change structure to quickly and effectively change the tangent line and improve the film pasting efficiency. In addition, the film taking surface is provided with a strong magnet and a guide pin to position and fix the film taking and sucking plates, further improving the film pasting efficiency and product adaptability of the equipment.

[0069] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0070] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A clamping tool, used for battery cell film lamination, characterized in that: include: A first bracket (1), a second bracket (2), a rotating assembly and a clamping assembly (5), wherein the rotating assembly is rotatably mounted between the first bracket (1) and the second bracket (2), the clamping assembly (5) is fixedly arranged on the rotating assembly and can rotate with the rotating assembly, and the clamping assembly (5) is used to clamp the battery cell (500); When the rotating assembly rotates, the clamping assembly (5) has a first station, a second station (201), a third station (301) and a fourth station (401) along the circumference of the rotation center of the rotating assembly, and the four stations are respectively used for loading and scanning the battery cell (500), end surface film pasting, long edge hot rolling of the film paper, and film paper corner rolling.

2. The clamping tool according to claim 1, characterized in that: The first station, the second station (201), the third station (301) and the fourth station (401) are respectively distributed in a cross shape along the circumference of the rotation center of the rotating component, and are sequentially used for the material loading and scanning, end face film laminating, long edge hot rolling of the film paper and corner rolling of the film paper. The first station is located directly above the rotating component.

3. The clamping tool according to claim 1, characterized in that: The clamping assemblies (5) are provided in four groups, and the four groups of the clamping assemblies (5) are distributed circumferentially around the rotation center of the rotating assembly in a cross shape. When one group of the clamping assemblies (5) is located at the first station, the remaining clamping assemblies (5) are located at the second station (201), the third station (301) and the fourth station (401) in sequence.

4. The clamping tool according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (3), and the clamping assembly (5) is provided in two groups, the two groups of the clamping assembly (5) are respectively arranged at the two ends of the rotating shaft (3), and the distance between the two groups of the clamping assembly (5) along the axial direction of the rotating shaft (3) is adjustable.

5. The clamping tool according to claim 4, characterized in that: The rotating assembly also includes a mounting frame, which is arranged on the rotating shaft (3) and has a plurality of mounting positions (4) evenly arranged along the axial direction of the rotating shaft (3). The two groups of clamping assemblies (5) are respectively and detachably arranged at different mounting positions (4).

6. The clamping tool according to any one of claims 1 to 4, characterized in that: It also includes a code scanning component (6), which is arranged at at least one end of the loading code scanning station, and is used to scan parameter information of the battery cell (500).

7. The clamping tool according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (3), and the clamping tool further comprises: a driving member (7), wherein the driving member (7) is arranged on the first bracket (1), and an output end of the driving member (7) is connected to the first end of the rotating shaft (3) for driving the rotating shaft (3) to rotate; An electric slip ring (9), wherein the stator of the electric slip ring (9) is fixed on the second bracket (2), and the rotor of the electric slip ring (9) is connected to the second end of the rotating shaft (3); The rotating shaft (3) is a hollow structure, and the wire of the driving member (7) can be routed through the hollow structure and the electric slip ring (9) and connected to an external power source.

8. The clamping tool according to claim 7, characterized in that: The clamping assembly (5) comprises two pneumatic clamping jaws arranged opposite to each other, and the clamping assembly (5) can be connected to an external air source so that the two clamping jaws can be opened or clamped, and the air channel of the air source can pass through the electric slip ring (9) and the hollow structure for routing.

9. The clamping tool according to claim 7, characterized in that: It also includes a return-to-zero baffle (10) and a photoelectric sensor (8); The return-to-zero baffle (10) is arranged at the first end of the rotating shaft (3), and the photoelectric sensor (8) is arranged at a position on the first bracket corresponding to the return-to-zero baffle, and can detect the number of revolutions of the rotating shaft through the return-to-zero baffle (10); When the photoelectric sensor (8) detects that the number of revolutions of the rotating shaft has reached a set value, the driving member (7) can return to its original position.

10. A film-sticking device for a battery cell, characterized in that: It comprises a film taking and pasting mechanism (200), a long side rolling and hot pressing mechanism (300), a film paper corner turning and rolling mechanism (400), and a clamping tool (100) as claimed in any one of claims 1 to 9, The film taking and pasting mechanism (200) is used to load the battery cell (500) and apply film to the end surface of the battery cell (500), the long side rolling and hot pressing mechanism (300) is used to roll the long side (502) of the film and hot press the end surface, and the film paper corner turning rolling mechanism (400) is used to roll the corner of the film.

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