A mechanical flattening head for automatic dust collection and a battery flattening device thereof

Abstract

An embodiment of the present invention provides a mechanical flattening head for automatic dust collection and a battery cell flattening device thereof, the mechanical flattening head for automatic dust collection includes a rotating disk with a vent hole provided on the rotating disk; a flattening wheel, the flattening wheel is mounted on the first disk surface of the rotating disk, the flattening wheel has a contact surface for contacting the end of the battery cell; a negative pressure suction nozzle, the negative pressure suction nozzle and the flattening wheel are located on the same side of the rotating disk, the negative pressure suction nozzle is mounted at one end of the vent hole, and the other end of the vent hole is used to connect to the negative pressure device; in the process of the rotating disk driving the flattening wheel to rotate to flatten the end of the battery cell, the present invention also facilitates the negative pressure device to perform normal dust collection on dust of various particle sizes generated by flattening through the negative pressure suction nozzle at the same time, which not only prevents dust from being adsorbed on various workpieces and equipment under the action of static electricity, but also ensures that the work station environment is clean and pollution-free.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing, in particular to a mechanical flattening head for automatic dust collection and a battery cell flattening device thereof. Background Art

[0002] The battery cell is the most important component of the battery. It undergoes a series of processes, including mechanical / ultrasonic flattening, encapsulation, casing insertion, and collector plate welding, before it can be assembled into a battery. Therefore, the performance of the cell directly affects the performance of the battery, making the cell preparation process before battery assembly extremely important.

[0003] There are many types of battery cell structures, one of which is a cylindrical cell composed of several separators and aluminum films wrapped alternately. If the battery cell is not flattened, the ends of the battery cell are uneven, may have flanges and a large number of burrs, and there is a certain degree of outward deviation in concentricity relative to the battery cell body. In order to facilitate the subsequent welding of the collector plate at the end of the battery cell and ensure the welding quality, the ends of the battery cell need to be flattened. At the same time, because the outer wall of the battery cell and the inner wall of the battery shell have very precise assembly dimensions, the battery cell that has not been flattened will cause scratches on the battery shell when it is directly inserted into the shell, making the flattening of the battery cell ends particularly necessary.

[0004] Currently, a mechanical flattening head is typically used to mechanically flatten the ends of battery cells. The head includes a rotating disk and multiple flattening wheels mounted on one side of the rotating disk. As the rotating disk rotates, each flattening wheel flattens the ends of the battery cells. Because crushed dust and other debris are generated during the mechanical flattening process, a dust hopper is currently installed on the underside of the mechanical flattening head to ensure a clean and pollution-free workstation environment. However, in actual use, it has been found that larger dust particles are automatically collected in the dust hopper under the action of their own gravity, while smaller dust particles are often susceptible to static electricity and tend to adhere to the battery cells, the mechanical flattening head, and other workpieces, making them difficult to clean. Furthermore, under the influence of the high temperatures generated by the mechanical flattening process, smaller dust particles are also prone to intense thermal motion, making them not only difficult to collect effectively but also easily affecting the quality of the surrounding environment and posing a threat to the health of workers. Therefore, effectively collecting dust particles of different particle sizes simultaneously during the mechanical flattening process is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The embodiment of the present invention provides a mechanical flattening head for automatic dust collection and a battery cell flattening device thereof, so as to solve the problem that it is difficult to effectively collect dust of different particle sizes at the same time during the current mechanical flattening process of the battery cell.

[0006] An embodiment of the present invention provides a mechanical flattening head for automatic dust collection, comprising: a rotating disk, wherein a vent is provided on the rotating disk; a flattening wheel, wherein the flattening wheel is mounted on the first disk surface of the rotating disk, the flattening wheel comprising an extrusion portion and a flattening portion, the extrusion portion having an extrusion surface along the edge for adhering to the end of the battery cell, the flattening portion being conical, the large end of the flattening portion being connected to the extrusion surface of the extrusion portion, the small end of the flattening portion extending toward the center of the rotating disk, an annular positive angle structure being formed between the side surface of the flattening portion and the extrusion surface, the side surface of the flattening portion being used to contact the end of the battery cell; a negative pressure suction nozzle, wherein the negative pressure suction nozzle and the flattening wheel are located on the same side of the rotating disk, the negative pressure suction nozzle being mounted at one end of the vent, and the other end of the vent being used to connect to a negative pressure device.

[0007] According to one embodiment of the present invention, the mechanical kneading head for automatic dust collection further includes: a transmission shaft, which has a hollow structure, one end of the transmission shaft is connected to the second disk surface of the rotating disk and is connected to the vent hole, the middle part of the transmission shaft is used to connect to the rotating drive mechanism, and the other end of the transmission shaft is used to connect to the negative pressure device.

[0008] According to an embodiment of the present invention, the mechanical flattening head for automatic dust collection includes a plurality of negative pressure suction nozzles, and the two ends of the negative pressure suction nozzle are arranged in a large and a small manner, and the large end of the negative pressure suction nozzle is used to face the battery core.

[0009] According to the mechanical flattening head for automatic dust collection of one embodiment of the present invention, the port shape of the negative pressure suction nozzle includes any one of a flat shape, a circle, and a regular polygon.

[0010] According to the mechanical smoothing head for automatic dust collection of one embodiment of the present invention, the center of the rotating disk is also connected to one end of a thimble, and the other end of the thimble is used to abut the axis of the battery cell.

[0011] According to an embodiment of the mechanical kneading head for automatic dust collection of the present invention, the kneading wheels include a plurality of kneading wheels, which are evenly distributed around the circumference of the center of the rotating disk.

[0012] According to the mechanical kneading head for automatic dust collection of one embodiment of the present invention, the kneading wheel is rotatably mounted on a bearing support, and the bearing support is radially adjustably mounted on the first disk surface of the rotating disk; and / or, the kneading wheel and the negative pressure suction nozzle are arranged one by one opposite to each other.

[0013] An embodiment of the present invention further provides a battery cell flattening device, comprising the mechanical flattening head for automatic dust collection as described above.

[0014] According to one embodiment of the present invention, a battery cell flattening device includes two mechanical flattening mechanisms, which are used to be arranged relatively along the length direction of the battery cell; the mechanical flattening mechanism includes a linear module, a rotary drive mechanism and the mechanical flattening head for automatic dust collection, the rotary drive mechanism is installed on the slide of the linear module, and the output end of the rotary drive mechanism is connected to the mechanical flattening head for automatic dust collection.

[0015] An embodiment of the present invention provides a mechanical flattening head for automatic dust collection and a battery cell flattening device thereof. By simultaneously arranging a flattening wheel and a negative pressure suction nozzle on the first disk surface of the rotating disk, and connecting the negative pressure suction nozzle to the negative pressure device through the vent hole on the rotating disk, when the rotating disk drives the flattening wheel to rotate to flatten the end of the battery cell, the negative pressure device can also perform normal dust collection on dust of various particle sizes generated by the flattening through the negative pressure suction nozzle at the same time, which not only prevents the dust from being adsorbed on various workpieces and equipment under the action of static electricity, but also ensures that the work station environment is clean and pollution-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the first structure of a flattening wheel provided by an embodiment of the present invention;

[0018] Figure 2 This is an embodiment of the present invention. Figure 1 Schematic diagram of the structure of the middle flattening wheel flattening the end of the battery cell;

[0019] Figure 3 This is a second structural schematic diagram of a flattening wheel provided by an embodiment of the present invention;

[0020] Figure 4 This is an embodiment of the present invention. Figure 3 Schematic diagram of the structure of the middle flattening wheel flattening the end of the battery cell;

[0021] Figure 5 1 is a schematic diagram of a top view of a mechanical flattening head provided by an embodiment of the present invention;

[0022] Figure 6 This is an embodiment of the present invention. Figure 5 A schematic diagram of the cross-sectional structure of the mechanical flattening head flattening the end of the battery cell;

[0023] Figure 7This is a schematic diagram of the main structure of a battery cell flattening device provided by an embodiment of the present invention;

[0024] Figure 8 Schematic diagram of the structure of the mechanical flattening mechanism shown in an embodiment of the present invention.

[0025] In the figure, 1. Mechanical flattening head; 11. Flattening wheel; 110. Extrusion part; 111. Flattening part; 112. Internal angle structure; 113. Connecting shaft; 114. External angle structure; 115. Transition surface; 12. Rotating disk; 13. Negative pressure nozzle; 14. Bearing support; 15. Ejector pin; 16. Transmission shaft; 2. Battery cell; 3. Linear module; 4. Rotary drive mechanism; 41. Reducer motor; 42. Belt transmission mechanism; 43. Gear transmission mechanism; 5. Fixed seat; 6. Fixed bearing seat. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments 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 any creative efforts shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] Figure 1 This is a schematic diagram of the first structure of a flattening wheel provided in this embodiment; Figure 2 for Figure 1 The structural schematic diagram shown is that the flattening wheel flattens the end of the battery cell.

[0029] See also Figure 1 and Figure 2 The flattening wheel 11 shown in this embodiment includes: an extrusion portion 110, the extrusion portion 110 has an extrusion surface along the edge for adhering to the end of the battery cell 2; a flattening portion 111, the flattening portion 111 is conical, the large end of the flattening portion 111 is connected to the extrusion surface of the extrusion portion 110, and the side of the flattening portion 111 is used to contact the end of the battery cell 2.

[0030] Specifically, the cone angle α of the flattening portion 111 shown in this embodiment is 30°-90°; the extrusion portion 110 shown in this embodiment can be cylindrical, and the extrusion portion 110 and the flattening portion 111 are arranged coaxially; the flattening wheel 11 shown in this embodiment can be a ceramic flattening wheel, which is processed with hard ceramic materials to ensure the hardness of extrusion and flattening, while having insulation properties to improve safety.

[0031] In this embodiment, an extrusion portion 110 and a flattening portion 111 are designed on the flattening wheel 11. Therefore, when the flattening wheel 11 rotates along with the mechanical flattening head to flatten the end of the battery cell 2, the extrusion surface on the extrusion portion 110 can be attached to the edge of the end of the battery cell 2 toward the side of the battery cell 2 to limit and squeeze the edge of the end of the battery cell 2, and the flattening portion 111 can contact the end face of the battery cell 2 from the side to flatten the end face of the battery cell 2. This can make the material of the end of the battery cell 2 near its edge gradually tighten toward the axis of the battery cell 2, thereby ensuring the flatness and tightness of the end of the battery cell 2 and preventing the problem of material turning outward along the edge of the end of the battery cell 2 to a certain extent.

[0032] like Figure 1 As shown, in one of the preferred embodiments, an annular internal angle structure 112 is formed between the side surface of the flattening portion 111 and the end face of the extrusion portion 110 shown in this embodiment, and the cross-sectional profile of the internal angle structure 112 along its axial direction is any one of an arc shape, a straight line shape, or a combination of at least one of them.

[0033] Based on the design of the internal corner structure 112, this embodiment forms a corner structure with an arc-shaped or straight-line transition between the end face and the side face of the battery cell 2 when the end of the battery cell 2 is mechanically flattened. Furthermore, the corner structure can also be a combination of multiple arcs, multiple straight lines, or multiple arcs and straight lines. Thus, by mechanically flattening, the aforementioned corner structure can be formed along the edge of the end of the battery cell 2, thereby effectively preventing the problem of material eversion along the edge of the end of the battery cell 2.

[0034] Figure 3 A schematic diagram of a second structure of a flattening wheel provided in this embodiment; Figure 4 for Figure 3 The structural schematic diagram shown is that the flattening wheel flattens the end of the battery cell.

[0035] See also Figure 3 and Figure 4Based on the improvements of the above-mentioned embodiment, the flattening wheel 11 shown in this embodiment forms an annular positive corner structure 114 between the side of the flattening portion 111 and the extrusion surface. Therefore, when the end of the battery cell 2 is mechanically flattened, under the extrusion of the positive corner structure 114, the material near the edge of the end of the battery cell 2 will gradually tighten toward the axis of the battery cell 2 to a large extent until a negative corner structure corresponding to the positive corner structure 114 is formed at the edge of the battery cell 2. In this way, while ensuring the flatness and compactness of the end of the battery cell 2, the problem of material turning outward along the edge of the end of the battery cell 2 is effectively prevented.

[0036] like Figure 3 As shown, the positive angle structure 114 shown in this embodiment is a frustum, which is coaxially arranged with the flattening portion 111. This ensures that in the process of flattening the battery cell 2, the force applied to various parts around the end of the battery cell 2 is uniform, thereby ensuring the aesthetics of the negative angle structure formed by flattening the end of the battery cell 2 and achieving a better flattening effect.

[0037] like Figure 3 As shown, the cone angle of the truncated cone shown in this embodiment is equal to that of the flattened portion 111. Thus, during the flattening process, a flattened cone can be formed at the end of the battery cell 2. Figure 4 The stepped structure shown here ensures the flatness and firmness of the corresponding upper step surface at the end of the battery cell 2 while effectively preventing the side material of the upper step structure from everting outward. Furthermore, even if some material everts outward, the everted material is prevented from radially extending into the sidewall area of the battery cell 2.

[0038] like Figure 3 As shown, in order to further prevent the material from turning outward at the corners of the upper step structure formed by flattening the end of the battery cell 2, the flattening wheel 11 shown in this embodiment also forms an annular transition surface 115 between the table top of the frustum and the side of the flattened portion 111. The cross-sectional profile of the transition surface 115 along its axial direction is any one of an arc shape, a straight line shape, or a combination of at least one of them.

[0039] like Figure 1 and Figure 3 As shown, in order to facilitate the installation and use of the flattening wheel 11, the flattening wheel 11 shown in this embodiment also includes a connecting shaft 113, one end of the connecting shaft 113 is connected to the end of the extrusion part 110 away from the flattening part 111, wherein the connecting shaft 113, the extrusion part 110 and the flattening part 111 are coaxially arranged.

[0040] Figure 5 A schematic diagram of the top view of a mechanical flattening head provided in this embodiment; Figure 6 As shown in this embodiment Figure 5 Schematic diagram of the cross-sectional structure of the mechanical flattening head flattening the end of the battery cell.

[0041] See also Figure 5 The present embodiment further provides a mechanical flattening head 1, comprising a rotating disk 12, a negative pressure suction nozzle 13 and the flattening wheel 11 as described above, wherein a vent is provided on the rotating disk 12; the flattening wheel 11 is mounted on the first disk surface of the rotating disk 12, and the small end of the flattening portion 111 of the flattening wheel 11 extends toward the center of the rotating disk 12; the negative pressure suction nozzle 13 and the flattening wheel 11 are located on the same side of the rotating disk 12, the negative pressure suction nozzle 13 is mounted at one end of the vent, and the other end of the vent is used to connect to the negative pressure device.

[0042] Specifically, the present embodiment includes multiple kneading wheels 11, which are evenly distributed around the circumference of the center of the rotating disk 12. The contact surfaces of the multiple kneading wheels 11 for contacting the corresponding ends of the battery cells 2 are located in the same plane and are perpendicular to the central axis of the rotating disk 12. In this way, as the kneading wheels 11 rotate along with the rotating disk 12, the extrusion surfaces of the corresponding extrusion parts 110 of each kneading wheel 11 are all attached to the edges of the ends of the battery cells 2. At the same time, the side surfaces of the corresponding kneading parts 111 of each kneading wheel 11 are all in contact with the end faces of the battery cells 2. Based on the fact that multiple kneading wheels 11 simultaneously knead the ends of the battery cells 2 along the circumference, while ensuring the uniformity of the force applied to the ends of the battery cells 2, the kneading efficiency is greatly improved, achieving a good mechanical kneading effect.

[0043] At the same time, during the kneading process, by starting the negative pressure device, the negative pressure suction nozzle 13 can effectively collect the dust of different particle sizes generated by kneading, preventing the smaller dust from adhering to the mechanical kneading head 1 and related equipment due to static electricity, and also preventing the dust from escaping into the work environment, thereby ensuring the cleanliness and pollution-free environment of the work station.

[0044] like Figure 5 As shown, in order to achieve a better dust collection effect, the negative pressure suction nozzle 13 shown in this embodiment includes multiple ones, and is evenly distributed in a circle relative to the center of the rotating disk 12. The two ends of the negative pressure suction nozzle 13 are set to be large and small. The large end of the negative pressure suction nozzle 13 is used to face the battery cell 2, wherein the flattening wheel 11 and the negative pressure suction nozzle 13 can be arranged one by one relative to each other to greatly improve the dust collection efficiency.

[0045] At the same time, the port shape of the negative pressure nozzle 13 shown in this embodiment includes any one of flat, circular, and regular polygonal. Figure 5 As shown, in order to reduce the space occupied by the negative pressure suction nozzle 13 as much as possible, the port shape of the negative pressure suction nozzle 13 shown in this embodiment is preferably flat.

[0046] like Figure 5As shown, the flattening wheel 11 shown in this embodiment is rotatably mounted on the bearing support 14, and the bearing support 14 is radially adjustably mounted on the first disk surface of the rotating disk 12. In this way, when flattening the end of the battery cell 2, the installation position of the flattening wheel 11 on the rotating disk 12 can be adaptively adjusted radially based on the diameter of the battery cell 2 to meet the actual flattening needs. At the same time, during the flattening process, since the flattening wheel 11 is rotatably mounted on the bearing support 14, the flattening wheel 11 and the end of the battery cell 2 are in contact in a rolling manner, which not only effectively prevents damage to the end of the battery cell 2 caused by direct rigid contact during flattening, but also forms an effective protection for the flattening wheel 11.

[0047] In one embodiment, the rotating disk 12 is provided with a plurality of chute grooves, each distributed radially along the rotating disk 12. Each chute groove corresponds to a bearing support 14, and a slider that matches the chute grooves is mounted on the bearing support 14. Once the smoothing wheel 11 is properly positioned on the rotating disk 12, the bearing support 14 and the rotating disk 12 are fastened together using a bolt assembly.

[0048] like Figure 5 As shown, the center of the rotating disk 12 shown in this embodiment is also connected to one end of the ejector pin 15, and the other end of the ejector pin 15 is used to abut the axis of the battery cell 2. Therefore, the ejector pin 15 can be used to better position and fix the battery cell 2 in the axial direction, ensuring the coaxiality of the battery cell 2 during the flattening process, thereby achieving a better flattening effect.

[0049] like Figure 6 As shown, based on the improvement of the above embodiment, this embodiment is further provided with a transmission shaft 16, which has a hollow structure. One end of the transmission shaft 16 is connected to the second disk surface of the rotating disk 12 and is connected to the vent hole. The middle part of the transmission shaft 16 is used to connect to the rotating drive mechanism 4, and the other end of the transmission shaft 16 is used to connect to the negative pressure device.

[0050] Specifically, the transmission shaft 16 shown in this embodiment is provided with a flange at one end near the rotating disk 12, so that the transmission shaft 16 can be connected to the second disk surface of the rotating disk 12 via the flange. A straight axial through hole is formed in the transmission shaft 16. The axial through hole has a gradually expanding structure at the end near the rotating disk 12 and corresponds to each vent hole on the rotating disk 12.

[0051] like Figure 6As shown, the transmission shaft 16 shown in this embodiment is rotatably installed in the fixed bearing seat 6. Since the middle part of the transmission shaft 16 is connected to the rotation drive mechanism 4, the end of the transmission shaft 16 away from the rotating disk 12 is also connected to the negative pressure device. Therefore, the transmission shaft 16 shown in this embodiment not only plays a mechanical transmission role to drive the rotation of the rotating disk 12, but also serves as an air transmission channel. When the negative pressure device is sucking air, the dust generated by the kneading can be sucked away by each negative pressure suction nozzle 13.

[0052] Figure 7 This is a schematic diagram of the main structure of a battery cell flattening device provided in this embodiment; Figure 8 Schematic diagram of the structure of the mechanical flattening mechanism shown in this embodiment.

[0053] like Figure 7 As shown, based on the improvement of the above embodiment, the battery cell flattening device shown in this embodiment includes the mechanical flattening head 1 as described above, wherein the battery cell flattening device includes two mechanical flattening mechanisms arranged opposite to each other, the mechanical flattening mechanisms including a linear module 3, a rotary drive mechanism 4 and a mechanical flattening head 1, the rotary drive mechanism 4 is installed on the slide of the linear module 3, and the output end of the rotary drive mechanism 4 is connected to the mechanical flattening head 1. Therefore, when flattening the battery cell 2, the two mechanical flattening mechanisms slide relative to each other and approach each other, so that the two mechanical flattening heads 1 respectively contact the two end faces of the battery cell 2; after contact, the mechanical flattening head 1 flattens the two ends of the battery cell 2 by rotating and squeezing; after flattening is completed, the two mechanical flattening mechanisms slide back to back toward the two ends of the battery cell 2 to reset, so as to facilitate the replacement of other battery cells to be flattened.

[0054] Specifically, the linear module 3 shown in this embodiment can be a linear motor module known in the art. The linear modules 3 corresponding to the two mechanical smoothing mechanisms move in the same linear direction, that is, the slides of the two linear modules 3 can move toward or away from each other. The rotation drive mechanism 4 shown in this embodiment includes a reduction motor 41, which is composed of a servo motor and a planetary reducer.

[0055] like Figure 7 As described above, a fixed seat 5 is provided on the slide of the linear module 3 , a reduction motor 41 is mounted on the fixed seat 5 , and an output end of the reduction motor 41 is connected to the transmission shaft 16 on the mechanical smoothing head 1 through a belt transmission mechanism 42 .

[0056] like Figure 8 As shown, in order to further ensure the rotation stability of the mechanical kneading head 1, the output end of the reduction motor 41 shown in this embodiment is connected to the transmission shaft 16 on the mechanical kneading head 1 through a gear transmission mechanism 43.

[0057] Preferably, this embodiment also proposes a flattening method based on the above-mentioned battery cell flattening device, including: radially adjusting the installation position of the flattening wheel 11 on the rotating disk 12 according to the diameter of the battery cell 2, and adjusting the axial spacing of the two mechanical flattening heads 1 according to the length of the battery cell 2 to clamp the battery cell 2 between the two mechanical flattening heads 1; starting the rotary drive mechanism 4 to mechanically flatten the two ends of the battery cell 2.

[0058] Specifically, when flattening the battery cell 2, the installation position of the bearing support 14 on the first disk surface of the rotating disk 12 is radially adjusted according to the diameter of the battery cell 2, so as to adjust the installation position of the flattening wheel 11 on the rotating disk 12 accordingly; according to the length of the battery cell 2, the corresponding linear modules 3 of the two mechanical flattening mechanisms are started, so that the mechanical flattening heads 1 on the two mechanical flattening mechanisms move toward or away from each other until the battery cell 2 is clamped between the two mechanical flattening heads 1, and the ejector pins 15 on the two mechanical flattening heads 1 correspondingly abut the axis of the two ends of the battery cell 2; finally, the reduction motors 41 on the two mechanical flattening mechanisms are started to drive the mechanical flattening heads 1 to rotate, thereby realizing mechanical flattening of the two ends of battery cells of different diameters and lengths, and achieving a better flattening effect.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical flattening head for automatic dust collection, characterized in that: include: A rotating disk, wherein a vent hole is provided on the rotating disk; A flattening wheel, the flattening wheel being mounted on the first disk surface of the rotating disk, the flattening wheel comprising an extrusion portion and a flattening portion, the extrusion portion having an extrusion surface along the edge for adhering to the end of the battery cell, the flattening portion being conical, the large end of the flattening portion being connected to the extrusion surface of the extrusion portion, the small end of the flattening portion extending toward the center of the rotating disk, an annular positive angle structure being formed between the side surface of the flattening portion and the extrusion surface, and the side surface of the flattening portion being used to contact the end of the battery cell; A negative pressure suction nozzle, the negative pressure suction nozzle and the smoothing wheel are located on the same side of the rotating disk, the negative pressure suction nozzle is installed at one end of the vent, and the other end of the vent is used to connect to the negative pressure device; When flattening the end of the battery cell, the flattening wheel rotates along with the rotating disk, and the extrusion surface of the extrusion part is attached to the edge of the end of the battery cell to limit and extrude the edge, and the side surface of the flattening part contacts the end face of the battery cell to flatten the end face of the battery cell, and under the extrusion of the positive angle structure, the material of the end of the battery cell near its edge is gradually tightened toward the axis of the battery cell until a negative angle structure corresponding to the positive angle structure is formed at the edge of the battery cell.

2. The automatic dust collecting mechanical flattening head according to claim 1, characterized in that: Also includes: The transmission shaft has a hollow structure, one end of the transmission shaft is connected to the second disk surface of the rotating disk and is connected to the vent hole, the middle part of the transmission shaft is used to connect to the rotation drive mechanism, and the other end of the transmission shaft is used to connect to the negative pressure device.

3. The automatic dust collecting mechanical flattening head according to claim 1, characterized in that: The negative pressure suction nozzle includes a plurality of nozzles, and the two ends of the negative pressure suction nozzle are arranged in a large and a small manner, and the large end of the negative pressure suction nozzle is used to face the battery core.

4. The automatic dust collecting mechanical flattening head according to claim 3, characterized in that: The port shape of the negative pressure suction nozzle includes any one of a flat shape, a circle, and a regular polygon.

5. The automatic dust collecting mechanical kneading head according to any one of claims 1 to 4, characterized in that: The center of the rotating disk is also connected to one end of a thimble, and the other end of the thimble is used to abut the axis of the battery core.

6. The automatic dust collecting mechanical flattening head according to any one of claims 1 to 4, characterized in that: The kneading wheels include a plurality of wheels, which are evenly distributed around the center of the rotating disk.

7. The automatic dust collecting mechanical flattening head according to claim 6, characterized in that: The kneading wheel is rotatably mounted on a bearing support, and the bearing support is adjustably mounted on the first disk surface of the rotating disk along the radial direction; and / or the kneading wheel and the negative pressure suction nozzle are arranged one by one opposite to each other.

8. A battery cell flattening device, characterized in that: The invention comprises a mechanical kneading head for automatic dust collection as described in any one of claims 1 to 7.

9. The battery cell flattening device according to claim 8, characterized in that: It includes two mechanical flattening mechanisms, which are used to be arranged relatively along the length direction of the battery cell; the mechanical flattening mechanism includes a linear module, a rotary drive mechanism and the mechanical flattening head for automatic dust collection, the rotary drive mechanism is installed on the slide of the linear module, and the output end of the rotary drive mechanism is connected to the mechanical flattening head for automatic dust collection.

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