CN213071193U

CN213071193U - Flat head is rubbed to machinery and flat device is rubbed to electric core thereof

Info

Publication number: CN213071193U
Application number: CN202022205894.1U
Authority: CN
Inventors: 向玉枝; 刘超; 王高鹏; 李兵; 龚腾标; 何隽
Original assignee: Wuhan Dayan Software Co ltd
Current assignee: Wuhan Dayan Software Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-04-27
Anticipated expiration: 2030-09-30

Abstract

The embodiment of the utility model provides a flat head is rubbed to machinery and flat device is rubbed to electric core thereof, and this machinery is rubbed the flat head and is included: rotating the disc; the kneading flat wheel comprises a plurality of kneading flat wheels which are distributed on the periphery of the rotating disc relative to the center of the rotating disc; the kneading flat wheels are provided with contact surfaces for contacting the end parts of the battery cores, and the contact surfaces on the kneading flat wheels are positioned on the same plane and are vertical to the central axis of the rotating disc; the utility model discloses a rotary disk drives each and rubs the steamboat rotation, rubs the steamboat by each and rubs the end of steamboat to electric core along circumference simultaneously and rubs the tie, not only rubs flat efficient, has ensured the planarization and the degree of compactness of electric core tip moreover to reach better machinery and rub flat effect.

Description

Flat head is rubbed to machinery and flat device is rubbed to electric core thereof

Technical Field

The utility model relates to a battery processing technology field especially relates to a flat head is rubbed to machinery and flat device is rubbed to electric core thereof.

Background

The battery core is the most important component of the battery, and the battery core can be assembled to form the battery after being sequentially processed by the processes of mechanical/ultrasonic kneading, encapsulation, shell entering, current collecting disc welding and the like. Therefore, the performance of the battery core has direct influence on the performance of the battery, and the preparation process of the battery core before the battery is assembled is very important.

The cell structure of the battery has various structures, wherein one of the structures is a cylindrical cell formed by alternately wrapping a plurality of diaphragms and aluminum films. When the battery cell is not flattened, the end part of the battery cell is uneven, a flanging and more burrs may occur, and the battery cell body still has a certain degree of outward deviation in concentricity. In order to facilitate the subsequent welding of the current collecting plate at the end of the battery core and ensure the welding quality, the end of the battery core needs to be subjected to rubbing treatment. Meanwhile, because the outer side wall of the battery core and the inner side wall of the battery shell are of very precise assembly sizes, the battery shell is scratched when the battery core which is not subjected to the flattening treatment is directly placed into the shell, and the flattening treatment of the end part of the battery core is particularly necessary.

However, when the end of the battery cell is flattened, a manual flattening manner is usually adopted, which not only wastes time and labor in operation and is low in efficiency, but also is difficult to achieve a consistent flattening standard due to limited manual strength, so that it is difficult to ensure flatness and compactness of the flattened end of the battery cell.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a flat head is rubbed to machinery and flat device is rubbed to electric core thereof for there is inefficiency in the mode of solving to electric core current adoption manual rubbing flat, is difficult to ensure to rub the planarization of flat electric core tip and the problem of degree of packing.

The embodiment of the utility model provides a flat head is rubbed to machinery, include: rotating the disc; the kneading flat wheel comprises a plurality of kneading flat wheels, and the kneading flat wheels are distributed on the rotating disc in a circumferential manner relative to the center of the rotating disc; the kneading flat wheels are provided with contact surfaces used for contacting the end parts of the battery cores, and the contact surfaces on the kneading flat wheels are positioned on the same plane and are perpendicular to the central axis of the rotating disc.

According to the utility model discloses a machinery flat head of rubbing, the flat wheel of rubbing includes rubs the flat portion, rubs the flat portion and is conical, rubs the tip of flat portion's little to stretch to the plate heart of rotary disk; the side surfaces of the flat kneading parts are used for contacting the end parts of the battery cores, and the contact surfaces, used for contacting the end parts of the battery cores, on the corresponding flat kneading parts of the plurality of flat kneading wheels are positioned on the same plane.

According to the utility model discloses a flat head is rubbed to machinery, it still includes the extrusion portion to rub the flat wheel, the extrusion portion has and is used for attachedly the extrusion face on the tip edgewise of electric core, rub the big head end of flat portion and connect the extrusion face of extrusion portion.

According to the utility model discloses a machinery rubs flat head, rub flat portion's side with form annular reentrant corner structure between the extrusion face of extrusion portion, reentrant corner structure is arbitrary one kind or the combination of at least one kind among circular-arc, the straight line shape along its axial cross-sectional profile.

According to the utility model discloses a flat head is rubbed to machinery, it still includes the connecting axle to rub the flat wheel, the one end of connecting axle is connected the extrusion portion is kept away from rub the one end of flat portion.

According to the utility model discloses a flat head is rubbed to machinery, rub the flatwheel and rotate and install on bearing, bearing install along radial adjustable ground on the rotary disk.

According to the utility model discloses a flat head is rubbed to machinery of embodiment, the one end of thimble is still connected to the heart of a plate of rotary disk, the other end of thimble is used for the butt the axle center of electricity core.

The embodiment of the utility model provides a flat device is rubbed to electric core still is provided, include as above the machinery rub the crew cut.

According to the utility model discloses an electric core is rubbed flatly and is put, including two machinery and is rubbed flatly the mechanism, two machinery are rubbed flatly the mechanism and are used for setting up along the length direction of electric core relatively; the mechanical flattening mechanism comprises a linear module, a rotary driving mechanism and a mechanical flattening head, the rotary driving mechanism is installed on a sliding table of the linear module, and an output end of the rotary driving mechanism is connected with the mechanical flattening head.

According to the utility model discloses a flat device is rubbed to electric core, rotary driving mechanism includes gear motor, gear motor's output passes through belt drive mechanism or gear drive and connects the flat head is rubbed to machinery.

The embodiment of the utility model provides a pair of flat head is rubbed to machinery and flat device is rubbed to electric core thereof, through setting up the rotary disk and arranging a plurality of flat wheels of rubbing on the rotary disk along the circumference, because each is rubbed the contact surface that is used for contacting electric core tip on the flat wheel and is located the coplanar, and the axis of perpendicular to rotary disk, thereby in the tip with electric core attached in each contact surface of rubbing the flat wheel, and when starting the rotary disk, the rotary disk will drive each and rub the flat wheel rotation, rub the flat wheel by each and rub the flat wheel simultaneously along circumference to the tip of electric core and rub the flat, not only rub flat efficient, and ensured the planarization and the compactness of electric core tip, and reach better machinery and rub flat effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first structural schematic diagram of a kneading flat wheel provided by an embodiment of the present invention;

fig. 2 is a schematic structural view illustrating the end of the battery cell is flattened by the flattening wheel in fig. 1 according to the embodiment of the present invention;

fig. 3 is a second structural schematic view of a kneading flat wheel provided by the embodiment of the present invention;

fig. 4 is a schematic structural diagram illustrating the flattening wheel in fig. 3 flattening the end of the battery cell according to the embodiment of the present invention;

fig. 5 is a schematic top view of a mechanical kneading block provided by an embodiment of the present invention;

fig. 6 is a schematic cross-sectional structural view of the mechanical flattening head in fig. 5 flattening the end of the electrical core according to the embodiment of the present invention;

fig. 7 is a schematic view of a front view structure of a cell flattening device provided in an embodiment of the present invention;

fig. 8 is a schematic structural view of a mechanical kneading mechanism according to an embodiment of the present invention.

In the figure, 1, mechanical flat head kneading; 11. kneading a flat wheel; 110. a pressing section; 111. kneading the flat part; 112. a reentrant corner structure; 113. a connecting shaft; 114. an external corner structure; 115. a transition surface; 12. rotating the disc; 13. a negative pressure suction nozzle; 14. a bearing support; 15. a thimble; 16. a drive shaft; 2. an electric core; 3. a linear module; 4. a rotation driving mechanism; 41. a reduction motor; 42. a belt drive mechanism; 43. a gear transmission mechanism; 5. a fixed seat; 6. and fixing the bearing seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a first structural schematic diagram of a kneading and leveling wheel provided by the embodiment; fig. 2 is a schematic structural diagram of the flattening wheel shown in fig. 1 flattening the end of the battery core.

Referring to fig. 1 and 2, the kneading wheel 11 shown in this embodiment includes: the extrusion part 110, the extrusion part 110 has an extrusion surface for attaching the edge of the end of the electric core 2; the flat part 111 is conical, the large end of the flat part 111 is connected to the pressing surface of the pressing part 110, and the side surface of the flat part 111 is used for contacting the end of the cell 2.

Specifically, the taper angle α of the flattening portion 111 shown in this embodiment is 30 ° to 90 °; the pressing portion 110 shown in this embodiment may have a cylindrical shape, and the pressing portion 110 is arranged coaxially with the kneading flat portion 111; the kneading and flattening wheel 11 shown in this embodiment can be a ceramic kneading and flattening wheel, and is processed by a hard ceramic material, so that the hardness of extrusion and flattening can be ensured, and the kneading and flattening wheel has insulation property and improves safety.

In the embodiment, the pressing portion 110 and the flattening portion 111 are designed on the flattening wheel 11, so that the flattening wheel 11 rotates along with the mechanical flattening to flatten the end of the battery cell 2, the pressing surface on the pressing portion 110 can be attached to the edge of the end of the battery cell 2 toward the side surface of the battery cell 2 to limit and press the edge of the end of the battery cell 2, and the side surface of the flattening portion 111 contacts the end surface of the battery cell 2 to flatten the end surface of the battery cell 2, so that the material at the end of the battery cell 2 close to the edge can be gradually tightened towards the axis of the battery cell 2, thereby ensuring the flatness and compactness of the end of the battery cell 2 and preventing the problem of material eversion at the edge of the end of the battery cell 2 to a certain extent.

As shown in fig. 1, in one preferred embodiment, an annular female corner structure 112 is formed between the side surface of the flattening portion 111 and the end surface of the pressing portion 110, and the cross-sectional profile of the female corner structure 112 along the axial direction thereof is any one of an arc shape and a straight shape, or a combination of at least one of the arc shape and the straight shape.

In the present embodiment, based on the design of the reentrant corner structure 112, when the end of the battery cell 2 is mechanically kneaded and flattened, a corner structure having an arc-shaped or linear transition may be formed between the end surface and the side surface of the battery cell 2, and the corner structure may have a combination shape of a plurality of arc-shaped portions, a plurality of linear portions, or a combination shape of a plurality of arc-shaped portions and linear portions. Thus, the corner structure can be formed on the edge of the end part of the battery cell 2 by mechanical kneading, so that the problem of material eversion at the edge part of the end part of the battery cell 2 is effectively prevented.

FIG. 3 is a second structural view of a kneading wheel according to this embodiment; fig. 4 is a schematic structural diagram of the flattening wheel shown in fig. 3 flattening the end of the battery core.

Referring to fig. 3 and fig. 4, based on the improvement of the above embodiment, the kneading flat wheel 11 shown in the present embodiment forms an annular male corner structure 114 between the side surface of the kneading flat part 111 and the pressing surface, so that when the end of the battery cell 2 is mechanically kneaded, under the pressing of the male corner structure 114, the material of the end of the battery cell 2 near its edge gradually tightens toward the axial center of the battery cell 2 to a greater extent until the female corner structure corresponding to the male corner structure 114 is formed at the edge of the battery cell 2. Therefore, the problem of material eversion at the edge part of the end part of the battery cell 2 is effectively prevented while the smoothness and the compactness of the end part of the battery cell 2 are ensured.

As shown in fig. 3, the external corner structure 114 shown in this embodiment is a truncated cone, and the truncated cone and the flattening portion 111 are coaxially arranged, so that uniformity of stress applied to each portion around the end of the battery cell 2 during flattening of the battery cell 2 can be ensured, the beauty of the internal corner structure formed by flattening the end of the battery cell 2 can be ensured, and a good flattening effect can be ensured.

As shown in fig. 3, the truncated cone of the present embodiment has the same taper angle as the flattening portion 111, so that a step-like structure as shown in fig. 4 can be formed at the end of the cell 2 during the flattening process, thereby effectively preventing the side material of the formed upper step structure from turning outwards while ensuring the flatness and compactness of the upper step surface corresponding to the end of the cell 2. At the same time, even if there is a situation that part of the material turns outwards, the material that turns outwards can be prevented from protruding to the side wall area of the battery core 2 along the radial direction.

As shown in fig. 3, in order to further prevent the material from turning out at the corner position of the upper step structure formed by flattening the end of the battery cell 2, the flattening wheel 11 shown in the present embodiment further forms an annular transition surface 115 between the mesa of the truncated cone and the side surface of the flattening portion 111, and the cross-sectional profile of the transition surface 115 along the axial direction thereof is any one of an arc shape and a straight shape, or a combination of at least one of the arc shape and the straight shape.

As shown in fig. 1 and fig. 3, in order to facilitate the installation and use of the kneading flat wheel 11, the kneading flat wheel 11 shown in this embodiment further includes a connecting shaft 113, and one end of the connecting shaft 113 is connected to one end of the pressing part 110 away from the kneading flat part 111, wherein the connecting shaft 113, the pressing part 110, and the kneading flat part 111 are coaxially arranged.

FIG. 5 is a schematic top view of a mechanical kneading block provided in this embodiment; fig. 6 is a schematic cross-sectional view of the mechanical flattening head of fig. 5 flattening the end of the battery cell shown in this embodiment.

Referring to fig. 5, the embodiment further provides a mechanical kneading flat head 1, which comprises a rotating disc 12, a negative pressure suction nozzle 13 and the kneading flat wheel 11, wherein the rotating disc 12 is provided with a vent hole; the kneading flat wheel 11 is arranged on the first plate surface of the rotating plate 12, and the small head end of the kneading flat part 111 corresponding to the kneading flat wheel 11 extends to the plate center of the rotating plate 12; the negative pressure suction nozzle 13 and the kneading and flattening wheel 11 are positioned on the same side of the rotating disk 12, the negative pressure suction nozzle 13 is arranged at one end of a vent hole, and the other end of the vent hole is used for communicating a negative pressure device.

Specifically, the kneading and flattening wheel 11 shown in the present embodiment includes a plurality of wheels, and is circumferentially and uniformly distributed with respect to the center of the rotating disc 12; the contact surfaces of the kneading and flattening wheels 11 for contacting the corresponding ends of the battery cells 2 are positioned on the same plane and perpendicular to the central axis of the rotating disc 12. Thus, in the process that each kneading and flattening wheel 11 rotates along with the rotating disc 12, the extrusion surface of the corresponding extrusion part 110 of each kneading and flattening wheel 11 is attached to the edge of the end part of the electric core 2, meanwhile, the side surface of the corresponding kneading and flattening part 111 of each kneading and flattening wheel 11 is in contact with the end surface of the electric core 2, and the end part of the electric core 2 is simultaneously kneaded and flattened along the circumferential direction based on the plurality of kneading and flattening wheels 11, so that the force uniformity of the end part of the electric core 2 is ensured, the kneading and flattening efficiency is greatly improved, the flatness and the compactness of the end part of the kneaded and flattened electric core 2 are ensured, and a better mechanical kneading and flattening effect is achieved.

It should be noted here that the mechanical flattening illustrated in the present embodiment is not limited to the above-mentioned preferred flattening wheels, as long as the selected flattening wheels have contact surfaces for contacting the ends of the battery cells 2, and the contact surfaces on the respective flattening wheels are located on the same plane and perpendicular to the central axis of the rotating disk 12, and the ends of the battery cells 2 can be simultaneously flattened in the circumferential direction.

Meanwhile, in the flattening process, by starting the negative pressure device, the dust with different particle sizes generated by flattening can be effectively collected by the negative pressure suction nozzle 13, the dust with smaller particle size is prevented from being attached to the mechanical flattening head 1 and related equipment due to electrostatic action, and the dust can be prevented from escaping into the station environment, so that the cleanness and no pollution of the station environment are ensured.

As shown in fig. 5, in order to achieve a better dust collecting effect, the negative pressure suction nozzles 13 shown in this embodiment include a plurality of negative pressure suction nozzles 13, which are uniformly distributed in a circle with respect to the center of the rotating disk 12, two ends of the negative pressure suction nozzles 13 are arranged in a large and small manner, and a large end of the negative pressure suction nozzles 13 is used for facing the electric core 2, wherein the kneading wheels 11 and the negative pressure suction nozzles 13 may be arranged in a one-to-one opposite manner, so as to greatly improve the dust collecting efficiency.

Meanwhile, the port shape of the negative pressure suction nozzle 13 shown in the present embodiment includes any one of a flat shape, a circular shape, and a regular polygon shape. As shown in fig. 5, 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 the present embodiment is preferably flat.

As shown in fig. 5, the kneading wheel 11 shown in the present embodiment is rotatably mounted on a bearing holder 14, and the bearing holder 14 is adjustably mounted on the first plate surface of the rotating plate 12 in the radial direction. In this way, when flattening the end of the cell 2, the mounting position of the flattening wheel 11 on the rotating disc 12 can be adaptively adjusted in the radial direction based on the diameter of the cell 2, so as to meet the actual flattening requirement. Meanwhile, in the kneading and flattening process, the kneading and flattening wheel 11 is rotatably arranged on the bearing support 14, so that the kneading and flattening wheel 11 is contacted with the end part of the battery cell 2 in a rolling manner, the damage to the end part of the battery cell 2 caused by direct rigid contact in kneading and flattening is effectively prevented, and the kneading and flattening wheel 11 can be effectively protected.

In one embodiment, a plurality of sliding grooves are disposed on the disk surface of the rotating disk 12, each sliding groove is distributed along the radial direction of the rotating disk 12, the sliding grooves correspond to the bearing supports 14 one by one, and the bearing supports 14 are provided with sliding blocks matched with the sliding grooves. After the installation position of the kneading wheel 11 on the rotating disc 12 is adjusted, the bearing support 14 and the rotating disc 12 can be fastened into a whole through a bolt assembly.

As shown in fig. 5, the center of the rotating disc 12 in this embodiment is further connected to one end of the ejector pin 15, and the other end of the ejector pin 15 is used for abutting against the axis of the electric core 2. From this, can carry out better axial positioning and fixed to electric core 2 based on thimble 15, ensure electric core 2 and rub the axiality of flat in-process to reach better and rub flat effect.

As shown in fig. 6, based on the improvement of the above embodiment, the present embodiment is further provided with a transmission shaft 16, the transmission shaft 16 is of a hollow structure, one end of the transmission shaft 16 is connected to the second disc surface of the rotating disc 12 and is communicated with the ventilation hole, the middle part of the transmission shaft 16 is used for connecting the rotary driving mechanism 4, and the other end of the transmission shaft 16 is used for communicating the negative pressure device.

Specifically, in the embodiment, a flange is disposed at one end of the transmission shaft 16 close to the rotating disc 12, so that the transmission shaft 16 can be connected to the second disc surface of the rotating disc 12 through the flange. A through axial through hole is formed in the transmission shaft 16, and the axial through hole is in a gradually expanding structure at one end close to the rotating disc 12 and corresponds to each vent hole in the rotating disc 12.

As shown in fig. 6, the transmission shaft 16 shown in this embodiment is rotatably installed in the fixed bearing seat 6, and since the middle part of the transmission shaft 16 is connected with the rotary driving mechanism 4, and one end of the transmission shaft 16 far away from the rotating disc 12 is also communicated with the negative pressure device, the transmission shaft 16 shown in this embodiment not only has a mechanical transmission function to drive the rotating disc 12 to rotate, but also serves as an air transmission channel, so that dust generated by kneading and flattening can be subjected to dust collection by each negative pressure suction nozzle 13 when the negative pressure device sucks air.

Fig. 7 is a schematic view of a front view structure of a cell flattening device provided in this embodiment; fig. 8 is a schematic structural view of the mechanical kneading mechanism of the present embodiment.

As shown in fig. 7, based on the improvement of the foregoing embodiment, the cell flattening device shown in this embodiment includes the above-mentioned mechanical flattening head 1, wherein the cell flattening device includes two oppositely-arranged mechanical flattening mechanisms, each mechanical flattening mechanism includes a linear module 3, a rotation driving mechanism 4 and the mechanical flattening head 1, the rotation driving mechanism 4 is installed on a sliding table of the linear module 3, and an output end of the rotation driving mechanism 4 is connected to the mechanical flattening head 1. Therefore, when the battery core 2 is flattened, the two mechanical flattening mechanisms slide relatively and approach each other, so that the two mechanical flattening heads 1 are respectively contacted with the two end faces of the battery core 2; after contact, the mechanical flat kneading head 1 kneads two ends of the electric core 2 flatly through rotary extrusion; after the kneading and flattening is finished, the two mechanical kneading and flattening mechanisms slide back to the two ends of the battery cell 2 so as to reset, so that other battery cells to be kneaded and flattened can be replaced conveniently.

Specifically, the linear modules 3 shown in this embodiment may be linear motor modules known in the art, and the moving directions of the linear modules 3 corresponding to the two mechanical kneading and flattening mechanisms are the same linear direction, that is, the sliding tables of the two linear modules 3 can move in opposite directions or away from each other. The rotation drive mechanism 4 shown in this embodiment includes a reduction motor 41, and the reduction motor 41 is composed of a servo motor and a planetary reducer.

As shown in fig. 7, a fixed seat 5 is provided on the sliding table of the linear module 3, a speed reducing motor 41 is installed on the fixed seat 5, and an output end of the speed reducing motor 41 is connected with the transmission shaft 16 on the mechanical kneading head 1 through a belt transmission mechanism 42.

As shown in fig. 8, in order to further ensure the stability of the rotation of the mechanical smoothing head 1, the output end of the speed reduction motor 41 shown in this embodiment is connected to the transmission shaft 16 on the mechanical smoothing head 1 through the gear transmission mechanism 43.

Preferably, this embodiment further provides a flattening method based on the above battery cell flattening device, including: the installation position of the kneading flat wheel 11 on the rotating disc 12 is adjusted along the radial direction according to the diameter of the battery core 2, and the axial distance between the two mechanical kneading flat heads 1 is adjusted according to the length of the battery core 2, so that the battery core 2 is clamped between the two mechanical kneading flat heads 1; and starting the rotary driving mechanism 4, and mechanically kneading and flattening the two ends of the battery cell 2.

Specifically, when the battery cell 2 is flattened, the mounting position of the bearing support 14 on the first disc surface of the rotating disc 12 is adjusted in the radial direction according to the diameter of the battery cell 2, so that the mounting position of the flattening wheel 11 on the rotating disc 12 is adjusted correspondingly; starting the linear modules 3 corresponding to the two mechanical flat kneading mechanisms according to the length of the battery cell 2, so that the mechanical flat kneading heads 1 on the two mechanical flat kneading mechanisms move in the opposite direction or in the opposite direction until the battery cell 2 is clamped between the two mechanical flat kneading heads 1, and the thimbles 15 on the two mechanical flat kneading heads 1 are correspondingly abutted to the axes of the two ends of the battery cell 2; and finally, starting the speed reducing motors 41 on the two mechanical flattening mechanisms to drive the mechanical flattening heads 1 to rotate, so that mechanical flattening of two ends of the battery cores with different diameters and lengths is realized, and a better flattening effect can be achieved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical friction head, comprising:

rotating the disc;

the kneading flat wheel comprises a plurality of kneading flat wheels, and the kneading flat wheels are distributed on the rotating disc in a circumferential manner relative to the center of the rotating disc; the kneading flat wheels are provided with contact surfaces used for contacting the end parts of the battery cores, and the contact surfaces on the kneading flat wheels are positioned on the same plane and are perpendicular to the central axis of the rotating disc.

2. The mechanical friction head of claim 1, wherein the friction wheel comprises a friction flat, the friction flat is conical, and a small end of the friction flat extends to the center of the rotating disc; the side surfaces of the flat kneading parts are used for contacting the end parts of the battery cores, and the contact surfaces, used for contacting the end parts of the battery cores, on the corresponding flat kneading parts of the plurality of flat kneading wheels are positioned on the same plane.

3. The mechanical kneading head of claim 2, wherein the kneading wheel further comprises a pressing part, the pressing part is provided with a pressing surface for attaching the end edge of the battery cell, and the large head end of the kneading part is connected with the pressing surface of the pressing part.

4. The mechanical kneading block of claim 3, wherein an annular internal corner structure is formed between the side surface of the kneading block and the pressing surface of the pressing block, and the cross-sectional profile of the internal corner structure along the axial direction of the internal corner structure is any one of circular arc and straight line or a combination of at least one of circular arc and straight line.

5. The mechanical friction head of claim 3, wherein the friction wheel further comprises a connecting shaft, one end of the connecting shaft being connected to an end of the pressing section remote from the friction section.

6. A mechanical roller head according to any of claims 1 to 5, wherein the roller is rotatably mounted on a bearing support which is radially adjustably mounted on the rotary plate.

7. The mechanical tumbling head of any one of claims 1 to 5, wherein the disk center of the rotating disk is further connected with one end of an ejector pin, and the other end of the ejector pin is used for abutting against the axis of the battery cell.

8. A cell flattening apparatus comprising a mechanical flattening head according to any of claims 1 to 7.

9. The cell flattening device of claim 8, comprising two mechanical flattening mechanisms, wherein the two mechanical flattening mechanisms are arranged oppositely along the length direction of the cell; the mechanical flattening mechanism comprises a linear module, a rotary driving mechanism and a mechanical flattening head, the rotary driving mechanism is installed on a sliding table of the linear module, and an output end of the rotary driving mechanism is connected with the mechanical flattening head.

10. The cell flattening device of claim 9, wherein the rotary drive mechanism comprises a speed reduction motor, and an output end of the speed reduction motor is connected with the mechanical flattening head through a belt transmission mechanism or a gear transmission mechanism.