Rubbing device and rubbing method for all-tab sodium ion battery

Abstract

The invention relates to a rubbing device for a full-tab sodium ion battery and a rubbing method of the rubbing device, and relates to the technical field of battery processing. The device comprises a working frame, the working frame is provided with a fixing piece used for fixing a battery on the working frame, the working frame is connected with a pressing assembly through an installation assembly, the pressing assembly comprises a driving piece and a rolling ball, the driving piece is arranged on the installation assembly, the rolling ball is connected with the driving piece, and the driving piece is used for driving the rolling ball to abut against and slide on a tab. The device has the effect that the flattening efficiency of the battery tabs is relatively high.

Description

Technical Field

[0001] The present application relates to the field of battery processing, and in particular to a flattening device and a flattening method for a full-tab sodium-ion battery. Background Art

[0002] During the production process of full-tab batteries, the tabs need to be flattened to press down the originally upright tabs so that the tabs are in contact with each other and are in the same plane, thereby achieving better current collection and facilitating the subsequent welding of the battery core and the collector plate, as well as the welding of the collector plate and the shell.

[0003] Currently, the more common solution on the market is to manually compact and flatten the battery cells after winding. Although this method can improve the compactness inside the battery cells to a certain extent, the manual operation efficiency is low and affects production, so it needs to be improved. Summary of the invention

[0004] In order to improve the problem of low efficiency in flattening the tabs by manual pressing, the present application provides a flattening device and a flattening method for a full-tab sodium-ion battery.

[0005] In the first aspect, the present application provides a flattening device for a full-tab sodium-ion battery using the following technical solution: A flattening device and a flattening method for a full-tab sodium-ion battery, comprising: Work rack; A fixing member, disposed on the working frame, and used to vertically fix the battery on the working frame; A pressing assembly is arranged on the working frame through a mounting assembly. The pressing assembly includes a driving member and a rolling ball. The driving member is arranged on the mounting assembly. The rolling ball is connected to the driving member. The driving member is used to drive the rolling ball to slide against the pole ear.

[0006] By adopting the above technical solution, when working, the battery is first placed vertically on the workbench so that the pole ear on one side end wall of the battery faces upward, and then the battery is fixed on the workbench in a vertical state using a fixing member, and it is ensured that the pole ear at the upper end of the battery is located at the pressing assembly. In the initial state, the ball is located at the edge of the battery. At this time, the driving member is started to drive the ball to gradually move toward the center of the battery. During this process, the ball slides on the pole ear. Under the action of its own gravity, when the ball abuts against the pole ear, it applies a downward bending extrusion force to the pole ear, thereby pressing the protruding pole ear flat and achieving flattening of the pole ear. The movement of the ball can achieve the bending of multiple pole ears, so that the efficiency of flattening the pole ears on the battery is higher.

[0007] Optionally, the installation component includes: A mounting plate, arranged on the working frame; A positioning rod is vertically arranged on the mounting plate, the positioning rod is located above the battery and is coaxial with the battery; A mounting block, sleeved on the positioning rod; The mounting ring is coaxial with the positioning rod, and the mounting ring is connected to the mounting block through a plurality of connecting rods. The rolling ball is arranged on the plurality of connecting rods, and the rolling ball can move on the connecting rods along the length direction of the connecting rods.

[0008] By adopting the above technical solution, when in use, the battery is fixed on the workbench. At this time, the positioning rod is relatively inserted into the center hole on the battery, and the ball is placed on the connecting rod, so that the ball is suspended at the edge of the battery. Then, the driving member is used to drive the ball to move along the length direction of the connecting rod, that is, a number of balls gradually move toward the center of the battery, thereby squeezing the pole ear to bend toward the center of the battery, wherein the positioning rod blocks the center hole of the battery to prevent the center hole of the battery from being blocked by the flat pole ear.

[0009] Optionally, the driving member includes: an electromagnet, disposed on the mounting block; A plurality of iron blocks are provided, and the plurality of iron blocks correspond to the connecting rod one by one. The iron blocks can move on the connecting rod along the length direction of the connecting rod, and the electromagnet can be attracted to the iron blocks when energized.

[0010] By adopting the above technical solution, when a number of rolling balls are distributed at the edge of the battery end, the electromagnet is energized to generate suction on the iron block, thereby simultaneously attracting the iron blocks toward the mounting block. The rolling balls are driven by the iron block to move toward the positioning rod, and during the movement, the rolling balls will abut against the pole ears and apply a thrust to the pole ears, thereby pressing the pole ears toward the center hole of the battery until the pole ears are bent, and finally the pole ears on the moving path of the rolling balls are pressed and bent, thereby flattening the pole ears on the battery end wall.

[0011] Optionally, a movable cylinder is provided on the mounting plate, and the output shaft of the movable cylinder is connected to the mounting block. The movable cylinder is used to drive the mounting block to move on the positioning rod along the length direction of the positioning rod. The connecting rod includes a mounting rod and a movable rod. One end of the mounting rod is hinged on the mounting ring. The movable rod is inserted on the mounting rod and can move on the mounting rod. The end of the movable rod away from the mounting rod is hinged on the mounting block.

[0012] By adopting the above technical solution, the mounting ring is placed on the workbench. When the battery is fixed on the workbench, the moving cylinder is started to drive the mounting block to move on the positioning rod, so that the distance from the mounting block to the mounting ring changes, thereby causing the moving rod to slide on the mounting rod to change the overall length of the connecting rod. At the same time, the inclination angle of the connecting rod will also change, that is, the moving trajectory of the ball changes, thereby changing the direction in which the ball applies force to the pole ear, and thus making the bending angle of the pole ear adjustable.

[0013] Optionally, the iron block is connected to the rolling ball through a connecting rope, and a rotating motor is provided on the workbench. The output end of the rotating motor is coaxial with the mounting ring and fixed to the mounting plate, and the rotating motor is used to drive the mounting plate to rotate with the positioning rod as the axis.

[0014] By adopting the above technical solution, when the ball moves from the edge of the battery to the center of the battery, the first flattening of the battery tab is achieved. At this time, the rotating motor is started, driving the mounting plate to rotate, driving the ball to make a circular motion on the tab, and realizing the flattening of the tab in all directions. When the ball moves, under the action of centrifugal force, the ball tends to move away from the positioning rod, thereby bending the connecting rope. During this process, the electromagnet is powered off, and the ball will pull the iron block with the connecting rope to the edge of the battery, so that the ball moves from the center of the battery to the edge of the battery on the tab, completing the second flattening of the battery tab in the direction of the ball.

[0015] During the rotation of the mounting ring, the electromagnet is continuously turned on and off, so that the iron block moves in a circular motion while also moving in a straight line along the length direction of the connecting rod, so that the rolling ball can press the tab on the end wall of the battery in all directions, thereby improving the quality and efficiency of flattening.

[0016] Optionally, a plurality of cleaning cylinders are provided on the fixed sleeve of the mounting ring, and the plurality of cleaning cylinders are arranged at intervals along the circumference direction of the mounting ring. An air inlet hole is provided on the side of the cleaning cylinder close to the positioning rod, and an air suction component is provided on the mounting ring, and the air suction component is used to form a negative pressure in the cleaning cylinder.

[0017] By adopting the above technical solution, when the ball rolls on the end wall of the battery to flatten the pole ear, debris is easily generated during the bending process of the pole ear. At this time, the suction component is started, so that negative pressure is formed in the cleaning cylinder, that is, there is suction in the cleaning cylinder, so that the debris on the battery is sucked into the cleaning cylinder through the air inlet hole, thereby achieving the cleaning of the debris on the battery.

[0018] Optionally, the air intake assembly comprises: A rotating cylinder is arranged in the cleaning cylinder, the rotating cylinder is sleeved on the mounting ring, and a plurality of blades are fixed on the side wall of the rotating cylinder; The rotating member is arranged on the mounting ring, and the rotating member is connected to the rotating cylinder, and is used for driving the rotating cylinder to rotate with the mounting ring as the axis.

[0019] By adopting the above technical solution, the rotating part is started to drive the rotating cylinder to rotate, so that the blades rotate, and negative pressure is generated in the space between the rotating cylinder and the cleaning cylinder, so as to achieve the purpose of external gas entering the cleaning cylinder from the air inlet.

[0020] Optionally, the rotating member includes: A rotating gear, a support plate is fixed on the mounting ring, and the rotating gear is rotatably connected to the support plate; A transmission gear, rotatably connected to the mounting ring, the transmission gear is coaxial with the mounting ring, and the transmission gear is meshed with the rotating gear; A plurality of insert rods are arranged on the transmission gear, and the plurality of insert rods are evenly distributed along the circumference direction of the transmission gear. A slot is arranged on the inner wall of the rotating cylinder, and the insert rods can be inserted into the slot and move in the slot to drive the rotating cylinder to rotate.

[0021] By adopting the above technical solution, the rotating gear is driven to rotate on the support plate, driving the transmission gear to rotate, so that the insertion rod is inserted from the opening at one end of the slot and continues to move with the transmission gear, so that the insertion rod applies a thrust force to the inner wall of the slot, thereby causing the rotating cylinder to move along the layout trajectory of the slot, that is, the rotating cylinder rotates, realizing the rotation of the blades, so that negative pressure is formed in the cleaning cylinder.

[0022] Optionally, a grid cylinder is provided between the rotating cylinder and the cleaning cylinder, and the grid cylinder is fixed to the cleaning cylinder via a fixing rod.

[0023] By adopting the above technical solution, when negative pressure is generated in the cleaning cylinder, so that the external gas enters the cleaning cylinder from the air inlet hole with the debris generated by the pole ear, the grid cylinder acts as a barrier, so that the debris entering the cleaning cylinder will not pass through the grid cylinder to reach the blades, thereby preventing the debris from getting stuck at the blades and affecting the use of the blades.

[0024] On the other hand, the present application also provides a flattening method for a flattening device for a full-tab sodium-ion battery, which adopts the following technical solution:.

[0025] S1. Fix the battery on the workbench, use the driving member to drive a number of rolling balls to move toward the center of the battery, and the rolling balls roll on the tabs, thereby pushing down the tabs along the way to achieve bending of the tabs; S2, the association drives the ball to rotate around the central axis of the battery, that is, the ball moves in a circular motion, so that the ball slides on the tab in multiple directions to flatten the tab; S3, start the suction component to suck the debris generated by the bending of the tab into the cleaning cylinder, so as to clean the debris on the end wall of the battery.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. When working, first place the battery vertically on the workbench so that the pole ear on one side of the end wall of the battery faces upward, then use the fixing piece to fix the battery on the workbench in a vertical state, and ensure that the pole ear on the upper end of the battery is located at the pressing assembly. In the initial state, the rolling ball is located at the edge of the battery. At this time, the driving part is started to drive the rolling ball to gradually move toward the center of the battery. In this process, the rolling ball slides on the pole ear. Under the action of its own gravity, when the rolling ball abuts against the pole ear, it applies a downward bending extrusion force to the pole ear, thereby pressing the protruding pole ear flat. The movement of the rolling ball can realize the bending of multiple pole ears, thereby improving the work efficiency of flattening the pole ears; 2. When the ball moves from the edge of the battery to the center of the battery, the first flattening of the battery tab is achieved. At this time, the rotating motor starts, driving the mounting plate to rotate, driving the ball to make a circular motion on the tab, and realizing the flattening of the tab in all directions. In this process, the electromagnet is powered off, and the ball will pull the iron block with the connecting rope to the edge of the battery, so that the ball moves from the center of the battery to the edge of the battery on the tab, completing the second flattening of the battery tab in the direction of the ball. During the rotation of the mounting ring, the electromagnet is continuously turned on and off, so that the iron block makes a linear motion along the length direction of the connecting rod while making a circular motion, realizing the rolling ball to press the tab in all directions on the end wall of the battery, improving the quality and efficiency of flattening. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a flattening device for a full-tab sodium-ion battery according to an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the pressing component; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0028] In the figure: 10, working frame; 20, fixing member; 30, mounting assembly; 31, mounting plate; 311, rotating motor; 312, moving cylinder; 32, positioning rod; 33, mounting block; 34, mounting ring; 35, connecting rod; 351, mounting rod; 352, moving rod; 40, pressing assembly; 41, driving member; 411, electromagnet; 412, iron block; 42, rolling ball; 421, connecting rope; 50, cleaning cylinder; 51, air inlet; 60, suction assembly; 61, rotating cylinder; 611, slot; 612, blade; 62, rotating member; 621, supporting plate; 622, rotating gear; 623, transmission gear; 624, plug rod; 70, grid cylinder. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The present application embodiment discloses a flattening device for a full-tab sodium ion battery. Figure 1 and Figure 2 The flattening device for full-tab sodium-ion battery includes a work frame 10, and a through hole is formed on the work frame 10, and the battery can be inserted into the through hole in a vertical state, that is, the tabs of the battery are located at the upper and lower ends of the battery. A fixing member 20 is provided on the work frame 10, and the fixing member 20 can be a bolt, which is threadedly connected to the work frame by the bolt, and the end of the bolt is pressed against the side wall of the battery, so as to fix the battery in the through hole.

[0031] Reference Figure 1 and Figure 2 In order to bend all the tabs toward the center hole of the battery, a mounting assembly 30 is provided on the workbench 10. The mounting assembly 30 is connected to a pressing assembly 40. The pressing assembly 40 includes a driving member 41 and a rolling ball 42. The driving member 41 is provided on the mounting assembly 30. The rolling ball 42 is connected to the driving member 41. When the driving member 41 is started, the rolling ball 42 is driven to slide on the tab. At this time, the rolling ball 42 applies a thrust force to the tab, so that the tab can be bent to achieve a flattening effect.

[0032] Reference Figure 1 and Figure 2 Specifically, the mounting assembly 30 includes a mounting plate 31, a positioning rod 32, a mounting block 33 and a mounting ring 34. A rotating motor 311 is mounted on the work frame 10 by bolts. The output end of the rotating motor 311 is fixed to the mounting plate 31. The output shaft of the rotating motor 311 and the central axis of the mounting plate 31 are both coincident with the central axis of the battery. The positioning rod 32 is vertically arranged, the positioning rod 32 is coaxial with the mounting plate 31, and the top end of the positioning rod 32 is fixed to the mounting plate 31. The bottom end of the positioning rod 32 is a conical structure, which is convenient for insertion into the center hole of the battery.

[0033] Reference Figure 1 and Figure 2The mounting block 33 is sleeved on the positioning rod 32 and can move on the positioning rod 32. A moving cylinder 312 is installed on the mounting plate 31 by bolts. The output end of the moving cylinder 312 is fixed to the mounting block 33 to drive the mounting block 33 to move. The mounting ring 34 is coaxial with the positioning rod 32 and is horizontally placed on the work frame 10. The mounting block 33 is connected to the mounting ring 34 through a plurality of connecting rods 35. The connecting rods 35 include a mounting rod 351 and a moving rod 352. One end of the mounting rod 351 is hinged on the mounting ring 34. The moving rod 352 is inserted on the mounting rod 351 and can move on the mounting rod 351. The end of the moving rod 352 away from the mounting rod 351 is hinged on the mounting block 33.

[0034] Reference Figure 1 and Figure 2 The driving member 41 includes an electromagnet 411 and a plurality of iron blocks 412. The electromagnet 411 is fixed on the mounting block 33. The plurality of iron blocks 412 correspond to the connecting rod 35 one by one. The mounting rod 351 and the moving rod 352 are both provided with slide grooves, and the two slide grooves are connected. The iron block 412 is inserted in the slide groove and can move on the connecting rod 35 along the length direction of the connecting rod 35. When the electromagnet 411 is energized, it can be attracted to the iron block 412. The iron block 412 is connected to the rolling ball 42 through the connecting rope 421.

[0035] When in use, the battery is fixed on the workbench 10, at this time, the positioning rod 32 is relatively inserted in the center hole on the battery, and the ball 42 is located at the mounting ring 34, that is, at the edge of the battery. Then the electromagnet 411 is energized to generate suction to the iron block 412, so that several iron blocks 412 are attracted to the direction of the mounting block 33 at the same time. It is realized that several balls 42 move in the direction of the positioning rod 32 under the drive of the iron block 412, and the ball 42 will abut against the pole ear during the movement, and apply a thrust to the pole ear, so that the pole ear is pressed in the direction close to the center hole of the battery until the pole ear is bent, and finally the pole ears on the moving path of the ball 42 are pressed and bent, and the pole ears on the end wall of the battery are flattened. Wherein the positioning rod 32 blocks the center hole of the battery to prevent the center hole of the battery from being blocked by the flat pole ear.

[0036] When there is a requirement for the bending angle of the pole ear, the moving cylinder 312 can be started to drive the mounting block 33 to move on the positioning rod 32, so that the distance from the mounting block 33 to the mounting ring 34 changes, thereby causing the moving rod 352 to slide on the mounting rod 351 to change the overall length of the connecting rod 35. At the same time, the inclination angle of the connecting rod 35 will also change, that is, the moving trajectory of the ball 42 changes, thereby changing the direction in which the ball 42 applies force to the pole ear, and thus making the bending angle of the pole ear adjustable.

[0037] Reference Figure 1 and Figure 2When the ball 42 moves in a straight line and flattens the tabs on the path of the connecting rod 35, in order to improve the flattening quality, the rotating motor 311 is driven to start, so that the mounting plate 31 rotates, driving the ball 42 to make a circular motion on the tabs, and realizing the flattening of the tabs in all directions. When the ball 42 moves, under the action of centrifugal force, the ball 42 tends to move away from the positioning rod 32, so that the connecting rope 421 is bent. In this process, the electromagnet 411 is powered off, and the ball 42 will pull the iron block 412 with the connecting rope 421 to the edge of the battery, so that the ball 42 moves from the center of the battery to the edge of the battery on the tab, completing the second flattening of the battery tab by the ball 42.

[0038] During the rotation of the mounting ring 34, the electromagnet 411 is continuously turned on and off, so that the iron block 412 makes a linear motion along the length direction of the connecting rod 35 while making a circular motion, so that the rolling ball 42 can press the tab on the end wall of the battery in all directions, thereby improving the quality and efficiency of flattening.

[0039] Reference Figure 2 and Figure 3 When the ball 42 rolls on the end wall of the battery to flatten the pole ear, debris is easily generated during the bending process of the pole ear. To prevent the debris from affecting the normal use of the battery, a plurality of cleaning barrels 50 are fixedly sleeved on the mounting ring 34. The plurality of cleaning barrels 50 are arranged at intervals along the circumference direction of the mounting ring 34. An air inlet 51 is provided on the side of the cleaning barrel 50 close to the positioning rod 32. An air suction component 60 is provided on the mounting ring 34. The air suction component 60 is used to suck the external gas from the air inlet 51 into the cleaning barrel 50. When the gas flows, it will bring the debris into the cleaning barrel 50, so as to clean the debris on the end face of the battery. The cleaning barrel 50 is composed of two half rings spliced ​​together. The two half rings are detachably connected by bolts, so that the cleaning ring can be removed, thereby cleaning the debris in the cleaning barrel 50 for subsequent use.

[0040] Reference Figure 2 and Figure 3Specifically, the suction assembly 60 includes a rotating cylinder 61 and a rotating member 62. The rotating cylinder 61 is arranged in the cleaning cylinder 50. The rotating cylinder 61 is sleeved on the mounting ring 34. A plurality of blades 612 are fixed on the side wall of the rotating cylinder 61. The rotating member 62 is arranged on the mounting ring 34. The rotating member 62 includes a rotating gear 622, a transmission gear 623 and a plurality of plug rods 624. A support plate 621 is fixed on the mounting ring 34. The rotating gear 622 is rotatably connected to the support plate 621. A motor is installed on the support plate 621. The output end of the motor is coaxially fixed with the rotating gear 622 to drive the rotating gear 622 to rotate. The transmission gear 623 is through-centered and coaxial with the mounting ring 34. The transmission gear 623 is rotatably connected to the mounting ring 34. The transmission gear 623 is coaxial with the mounting ring 34 and meshes with the rotating gear 622.

[0041] Reference Figure 2 and Figure 3 A plurality of insert rods 624 are fixed on the transmission gear 623, and the plurality of insert rods 624 are evenly arranged along the circumference direction of the transmission gear 623. A slot 611 is opened on the inner wall of the rotating cylinder 61, and the slot 611 is spirally arranged around the circumference of the rotating cylinder 61. The insert rod 624 can be inserted into the slot 611 and move in the slot 611 to drive the rotating cylinder 61 to rotate.

[0042] During the process of the ball 42 flattening the pole ear, the motor is started to drive the rotating gear 622 to rotate, which drives the transmission gear 623 to rotate, so that the insertion rod 624 is inserted from the opening at one end of the slot 611 and continues to move with the transmission gear 623, so that the insertion rod 624 applies a thrust force to the inner wall of the slot 611, so that the rotating cylinder 61 moves along the layout trajectory of the slot 611, that is, the rotating cylinder 61 rotates, and the blade 612 rotates, so that negative pressure is formed in the cleaning cylinder 50, that is, there is suction in the cleaning cylinder 50, so that the debris on the battery is sucked into the cleaning cylinder 50 from the air inlet 51, so that the debris on the battery is cleaned.

[0043] Reference Figure 3 In order to prevent the debris of the cleaning cylinder 50 from getting stuck in the blades 612, a mesh cylinder 70 is provided between the rotating cylinder 61 and the cleaning cylinder 50, and the mesh cylinder 70 is fixed to the cleaning cylinder 50 by a fixing rod. The mesh cylinder 70 plays a blocking role, so that the debris entering the cleaning cylinder 50 will not pass through the mesh cylinder 70 to reach the blades 612, so that the debris will not get stuck in the blades 612 and affect the use of the blades 612.

[0044] The implementation principle of a flattening device for a full-ear sodium-ion battery in an embodiment of the present application is as follows: when working, the battery is first placed vertically on a workbench 10 so that the ear on one side of the end wall of the battery faces upward, and then the battery is fixed on the workbench 10 in a vertical state using a fixing member 20, and it is ensured that the ear at the upper end of the battery is located at the pressing assembly 40. In the initial state, the rolling ball 42 is located at the edge of the battery. At this time, the driving member 41 is started to drive the rolling ball 42 to gradually move toward the center of the battery. During this process, the rolling ball 42 slides on the ear. Under the action of its own gravity, when the rolling ball 42 abuts against the ear, a downward bending extrusion force is applied to the ear, thereby pressing the protruding ear flat and achieving flattening of the ear. The movement of the rolling ball 42 can achieve the bending of multiple ears, so that the efficiency of flattening the ear on the battery is higher.

[0045] The present application also discloses a flattening method for a flattening device for a full-tab sodium-ion battery, comprising the following steps: S1. Fix the battery on the work frame 10, use the driving member 41 to drive a plurality of rolling balls 42 to move toward the center of the battery, and the rolling balls 42 roll on the tabs, thereby pushing down the tabs along the way to achieve bending of the tabs; S2, the association drives the ball 42 to rotate around the central axis of the battery, that is, the ball 42 makes a circular motion, so that the ball 42 slides on the tab in multiple directions to flatten the tab; S3, start the suction assembly 60 to suck the debris generated by the bending of the tab into the cleaning cylinder 50, so as to clean the debris on the battery end wall.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flattening device for a full-ear sodium-ion battery, characterized in that: include: Work stand (10); A fixing member (20) is arranged on the working frame (10), and the fixing member (20) is used to vertically fix the battery on the working frame (10); A pressing assembly (40), wherein the pressing assembly (40) is arranged on the working frame (10) through the mounting assembly (30), the pressing assembly (40) comprises a driving member (41) and a rolling ball (42), the driving member (41) is arranged on the mounting assembly (30), the rolling ball (42) is connected to the driving member (41), and the driving member (41) is used to drive the rolling ball (42) to slide against the pole ear.

2. The flattening device for full-tab sodium-ion battery according to claim 1, characterized in that: The mounting assembly (30) comprises: A mounting plate (31) is arranged on the working frame (10); A positioning rod (32) is vertically arranged on the mounting plate (31), wherein the positioning rod (32) is located above the battery and is coaxial with the battery; A mounting block (33) sleeved on the positioning rod (32); The mounting ring (34) is coaxial with the positioning rod (32). The mounting ring (34) is connected to the mounting block (33) via a plurality of connecting rods (35). The plurality of connecting rods (35) are each provided with the rolling ball (42). The rolling ball (42) can move on the connecting rod (35) along the length direction of the connecting rod (35).

3. The flattening device for full-tab sodium-ion battery according to claim 2, characterized in that: The driving member (41) comprises: An electromagnet (411) is disposed on the mounting block (33); A plurality of iron blocks (412) are provided, and the plurality of iron blocks (412) correspond to the connecting rod (35) one by one. The iron blocks (412) can move on the connecting rod (35) along the length direction of the connecting rod (35), and the electromagnet (411) can be attracted to the iron blocks (412) when energized.

4. The flattening device for full-tab sodium-ion battery according to claim 2, characterized in that: A movable cylinder (312) is provided on the mounting plate (31), the output shaft of the movable cylinder (312) is connected to the mounting block (33), the movable cylinder (312) is used to drive the mounting block (33) to move on the positioning rod (32) along the length direction of the positioning rod (32), the connecting rod (35) comprises a mounting rod (351) and a movable rod (352), one end of the mounting rod (351) is hinged on the mounting ring (34), the movable rod (352) is inserted on the mounting rod (351) and can move on the mounting rod (351), and one end of the movable rod (352) away from the mounting rod (351) is hinged on the mounting block (33).

5. The flattening device for full-tab sodium-ion battery according to claim 3, characterized in that: The iron block (412) is connected to the rolling ball (42) via a connecting rope (421). A rotating motor (311) is provided on the working frame (10). The output end of the rotating motor (311) is coaxial with the mounting ring (34) and is fixed to the mounting plate (31). The rotating motor (311) is used to drive the mounting plate (31) to rotate around the positioning rod (32).

6. The flattening device for full-tab sodium-ion battery according to claim 1, characterized in that: A plurality of cleaning cylinders (50) are fixedly sleeved on the mounting ring (34), and the plurality of cleaning cylinders (50) are arranged at intervals along the circumference direction of the mounting ring (34). An air inlet hole (51) is provided on one side of the cleaning cylinder (50) close to the positioning rod (32). An air suction component (60) is provided on the mounting ring (34), and the air suction component (60) is used to form a negative pressure in the cleaning cylinder (50).

7. The flattening device for full-tab sodium-ion battery according to claim 6, characterized in that: The air suction component (60) comprises: A rotating cylinder (61) is arranged in the cleaning cylinder (50), the rotating cylinder (61) is sleeved on the mounting ring (34), and a plurality of blades (612) are fixed on the side wall of the rotating cylinder (61); The rotating member (62) is arranged on the mounting ring (34). The rotating member (62) is connected to the rotating cylinder (61) and is used to drive the rotating cylinder (61) to rotate with the mounting ring (34) as the axis.

8. The flattening device for full-tab sodium-ion battery according to claim 7, characterized in that: The rotating member (62) comprises: A rotating gear (622), a support plate (621) is fixed on the mounting ring (34), and the rotating gear (622) is rotatably connected to the support plate (621); A transmission gear (623) is rotatably connected to the mounting ring (34), the transmission gear (623) is coaxial with the mounting ring (34), and the transmission gear (623) is meshed with the rotating gear (622); A plurality of insertion rods (624) are arranged on the transmission gear (623), and the plurality of insertion rods (624) are evenly arranged along the circumference direction of the transmission gear (623). A slot (611) is provided on the inner wall of the rotating cylinder (61), and the insertion rod (624) can be inserted into the slot (611) and move in the slot (611) to drive the rotating cylinder (61) to rotate.

9. The flattening device for full-tab sodium-ion battery according to claim 7, characterized in that: A grid cylinder (70) is provided between the rotating cylinder (61) and the cleaning cylinder (50), and the grid cylinder (70) is fixed to the cleaning cylinder (50) via a fixing rod.

10. A flattening method for a flattening device for a full-tab sodium-ion battery, using the flattening device for a full-tab sodium-ion battery according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, fix the battery on the working frame (10), use the driving member (41) to drive a plurality of rolling balls (42) to move toward the center of the battery, and the rolling balls (42) roll on the tabs, thereby pushing down the tabs along the way, thereby achieving bending of the tabs; S2, driving the rolling ball (42) to rotate around the central axis of the battery, that is, the rolling ball (42) performs a circular motion, so that the rolling ball (42) slides on the tab in multiple directions to achieve flattening of the tab; S3, starting the suction assembly (60) to suck the debris generated by the bending of the tab into the cleaning cylinder (50), thereby cleaning the debris on the battery end wall.

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