Pole lug flattening and forming mechanism

Abstract

The utility model relates to the technical field of battery production equipment, and discloses a tab flattening and forming mechanism which comprises a positioning seat, and a positioning groove for placing a battery cell is formed in the positioning seat; the pressing assembly is arranged on one side of the positioning seat and is used for pressing and fixing the battery cell in the positioning groove; the flattening assembly is arranged on one side of the positioning seat and comprises a movable positioning plate, the movable positioning plate is in transmission connection with a first flattening driving part, the flattening driving part drives the movable positioning plate to be close to or away from the tab, a pressing head is rotationally arranged on the movable positioning plate, and the pressing head rotates to be parallel to the tab so as to flatten the tab. According to the tab flattening device, the tabs are flattened under the condition that the flattening assembly is kept parallel to the tabs, so that the technical effect of improving the flatness of the tabs is achieved, and the flattening and forming effects of the tabs are good.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production equipment, and particularly relates to a tab flattening and forming mechanism. Background Art

[0002] Battery cells are an important component of batteries. Common battery cells include aluminum shell batteries, soft pack batteries, and cylindrical batteries. Cylindrical batteries are cylindrical battery cells that can be produced using a winding machine. Cylindrical batteries can store more electricity due to their compact structural design. Cylindrical batteries include tabs, which are located at both ends of the cylindrical battery along the axis. Tabs are metal conductors used to connect the positive and negative electrodes of the battery cell. They serve as a bridge between the battery and the external circuit, ensuring a smooth connection between the internal and external circuits of the battery and realizing the battery's charge and discharge functions.

[0003] During the battery production process, the tabs at the cylindrical cells need to be flattened to ensure the flatness of the tabs and the thickness of the cylindrical cells. The tab flattening is conducive to stable connection with other battery components, achieving efficient energy transmission, and facilitating subsequent assembly into the shell. In related technologies, the tabs can be flattened by a tab flattening mechanism. The tab flattening mechanism includes a conveying seat for conveying cylindrical cells. The conveying seat is provided with a processing hole. The cylindrical cells are placed in the processing hole. A flattening seat for squeezing the cylindrical cells is provided on one side of the conveying seat. The conveying seat is connected to a driving member. When the driving member drives the conveying seat close to the flattening seat, the flattening seat and the conveying seat cooperate to squeeze the two ends of the cylindrical cell. The tab flattening mechanism realizes the flattening of the tabs.

[0004] However, during the flattening process, the conveying seat and the flattening seat may be slightly skewed relative to the tab, and the flattening flatness of the tab may be easily affected. Utility Model Content

[0005] In order to solve the shortcomings of the existing technology, the utility model provides a tab flattening and forming mechanism. By rotating the pressure head, the pressure head is in a state parallel to the tab, and the locking piece locks the pressure head. The flattening assembly can flatten the tab while maintaining a state parallel to the tab, thereby improving the flatness of the tab and achieving a good tab flattening and forming effect.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] In the first aspect, the utility model provides a tab flattening and forming mechanism, including a positioning seat, which is provided with a positioning groove for placing a battery cell; a clamping assembly, which is arranged on one side of the positioning seat and is used to clamp and fix the battery cell in the positioning groove; and a flattening assembly is arranged on one side of the positioning seat, and the movable positioning plate is transmission-connected to a first flattening drive member, and the flattening drive member drives the movable positioning plate to approach or move away from the tab, and a pressure head is rotatably provided on the movable positioning plate, and the pressure head rotates to be parallel to the tab to flatten the tab.

[0008] In some implementations, a locking member for locking the pressure head is provided between the pressure head and the movable positioning plate; a spherical adjustment seat is provided between the pressure head and the movable positioning plate, the spherical adjustment seat includes a seat body and a sphere, the ball head is connected between the seat body and the sphere, the seat body is detachably connected to the pressure head, the sphere is detachably connected to the movable positioning plate, and the locking member is provided between the seat body and the movable positioning plate.

[0009] In some implementations, the seat body includes a connecting section, which is passed through the movable positioning plate; the locking member includes a nut, which is threadedly connected to the end of the connecting section passing through the movable positioning plate to limit the movement of the seat body, and the seat body abuts against the sphere; and an elastic member, which is sleeved on the end of the connecting section passing through the movable positioning plate and is located between the nut and the corresponding sides of the movable positioning plate, and the elastic member abuts against the nut and the movable positioning plate respectively.

[0010] In some implementations, the flattening assembly further includes a mounting seat, the mounting seat is transmission-connected to the first flattening drive member, and the movable positioning plate is slidingly connected to the mounting seat.

[0011] In some implementations, a force sensor for detecting the pressure when the tab is flattened is provided between the mounting seat and the movable positioning plate.

[0012] In some implementations, two groups of the flattening assemblies are provided, and the two groups of the flattening assemblies are arranged opposite to the tabs of the battery cells respectively.

[0013] In some implementations, a CCD component is provided on one side of the positioning seat, and the CCD component measures the distance between the two end tabs on the battery cell.

[0014] In some implementations, the pressing assembly includes a pressing block, and the pressing block is transmission-connected to a pressing drive member for driving the pressing block to move up and down to press or release the battery cell.

[0015] In some implementations, the movable positioning plate is provided with a dust collecting member for collecting metal powder generated during flattening.

[0016] In some implementations, the dust suction member includes an air knife, and the dust suction port of the air knife is arranged opposite to the pressure head.

[0017] In summary, the present invention has at least the following advantages:

[0018] The tab flattening and forming mechanism provided by the present invention places the battery cell to be processed in the positioning groove, and the pressing assembly presses the battery cell, and the battery cell is fixed in the positioning groove. Before the tab is flattened and formed, the locking part releases the pressing head, and the pressing head is rotated. The pressing head can adjust the angle relative to the movable positioning plate to rotate to a state parallel to the tab. The locking part locks the pressing head, and the flattening drive part drives the pressing head close to the battery cell to flatten the tab. The pressing head can flatten the tab while maintaining an angle parallel to the tab, which is beneficial to improving the flatness of the tab and thus ensuring the tab flattening and forming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the tab flattening and forming mechanism of a specific embodiment of the utility model.

[0020] Figure 2 It is a side view of the tab flattening and forming mechanism of a specific embodiment of the utility model.

[0021] Figure 3 It is a side view of a flattening assembly according to a specific embodiment of the present invention.

[0022] Figure 4 This is a cross-sectional view of a flattening assembly according to a specific embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the partial structure of the first flattening driving member and the second flattening driving member in a specific embodiment of the present utility model.

[0024] Figure 6 It is a schematic diagram of the local structure of the CCD component of a specific embodiment of the present utility model.

[0025] Markings in the figure:

[0026] 1. Positioning seat; 11. Positioning groove;

[0027] 2. Compression assembly; 21. Compression block; 22. Compression drive; 221. Compression seat;

[0028] 3. Flattening assembly; 31. Movable positioning plate; 32. First flattening drive member; 321. First linear guide rail; 322. First slider; 323. First motor; 33. Press head; 331. Connecting seat; 34. Spherical adjustment seat; 341. Seat body; 3411. Connecting section; 342. Spherical body; 35. Mounting seat; 36. Second slider; 37. Second linear guide rail;

[0029] 4. Locking member; 41. Nut; 42. Elastic member;

[0030] 5. Force sensor;

[0031] 6. CCD assembly; 61. Support plate;

[0032] 7. Dust collection parts; 71. Air knife;

[0033] 8. Cylindrical battery cells. DETAILED DESCRIPTION

[0034] To make the purpose, 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 drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected 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 effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Please see the attached Figure 1 and Figure 2 The tab flattening and forming mechanism of the present invention includes a positioning seat 1 for placing and positioning the battery cell. A clamping component 2 is provided on one side of the positioning seat 1. The clamping component 2 presses the battery cell. A flattening component 3 is provided on one side of the positioning seat 1 in the direction of the battery cell axis to flatten the tab of the cylindrical battery cell 8, which is beneficial to improve the flatness of the tab flattening.

[0038] Among them, the positioning seat 1 is provided with a positioning groove 11 for placing the cylindrical battery cell 8. The positioning groove 11 is specifically a V-shaped groove, which is conducive to the rapid positioning of the cylindrical battery cell 8. It can be understood that this is not a specific limitation on the shape of the positioning groove 11. Technicians in related fields can replace it on this basis. For example, in some other specific embodiments, the positioning groove 11 is a U-shaped groove. In a preferred embodiment, there are multiple positioning grooves 11, and the multiple positioning grooves 11 are arranged at intervals on the positioning seat 1. Specifically, there can be three positioning grooves 11, which facilitates the tab flattening and forming of multiple cylindrical battery cells 8 to improve production efficiency.

[0039] The clamping assembly 2 is located at the top of the positioning seat 1 and is arranged opposite to the positioning groove 11. In a preferred embodiment, the clamping assembly 2 includes a clamping block 21 for abutting against the cylindrical battery cell 8. In some specific embodiments shown, the clamping block 21 is a T-shaped block, which is conducive to the clamping block 21 fully compressing the cylindrical battery cell 8 so that the cylinder is fixed to the positioning groove 11, reducing the possibility of the clamping block 21 being displaced. A clamping seat 221 is provided on the side of the clamping block 21 away from the positioning seat 1. The clamping seat 221 is connected to a clamping drive 22 in a transmission manner. The clamping drive 22 is preferably, but not limited to, a clamping cylinder. The output end of the clamping cylinder is detachably connected to the clamping seat 221. Specifically, the output end of the clamping cylinder can be assembled with the clamping seat 221 by bolts. When the clamping drive 22 changes its stroke to drive the clamping seat 221 close to the positioning groove 11, the clamping seat 221 drives the clamping block 21 to compress the cylindrical battery cell 8, and the cylindrical battery cell 8 is positioned and fixed.

[0040] The flattening assembly 3 is located at one end of the cylindrical battery cell 8 to be flattened in the axial direction. In a preferred embodiment, two groups of flattening assemblies 3 are provided, and the two groups of flattening assemblies 3 are respectively located at the two ends of the cylindrical battery cell 8 in opposite directions along the axis, so as to flatten the two end ears of the cylindrical battery cell 8 at the same time, which is conducive to improving production efficiency and can ensure that the cylindrical battery cell 8 obtains a balanced pressing force at the two end ears, thereby improving the flatness of the ear flattening.

[0041] The flattening assembly 3 includes a movable positioning plate 31. Specifically, the movable positioning plate 31 is vertically arranged. A pressure head 33 for flattening the tab is provided on the movable positioning plate 31. The pressure head 33 is rotatably connected to the movable positioning plate 31. According to the positioning state of the cylindrical battery cell 8, the pressure head 33 rotates to adjust to be parallel to the corresponding side end face of the cylindrical battery cell 8 along the axial direction, that is, the pressure head 33 is parallel to the tab. The pressure head 33 can flatten the tab while being parallel to the tab to ensure the flatness of the tab. A locking member 4 is provided between the pressure head 33 and the movable positioning plate 31. When the pressure head 33 is rotated and adjusted to be parallel to the tab, the locking member 4 locks the pressure head 33. The movable positioning plate 31 is transmission-connected to a first flattening drive member 32. The first flattening drive member 32 drives the movable positioning plate 31 to approach or move away from the positioning seat 1, and the movable positioning plate 31 drives the pressure head 33 to approach or move away from the tab.

[0042] Before the tabs of the cylindrical battery cell 8 are flattened, the rotating pressure head 33 is rotated to an angle parallel to the corresponding side end face of the cylindrical battery cell 8. The locking member 4 locks the pressure head 33, and the pressure head 33 remains parallel to the tab. The first flattening drive member 32 drives the mobile positioning plate 31 to approach the positioning seat 1. The mobile positioning plate 31 drives the pressure head 33 to approach the tab of the cylindrical battery cell 8. The pressure head 33 flattens the tab in parallel, thereby improving the flatness of the tab flattening and achieving a good tab flattening effect. The pressure head 33 and the mobile positioning plate 31 are flexible to use and can be adjusted relative to cylindrical battery cells 8 of different specifications or cylindrical battery cells 8 that are slightly skewed in positioning, so as to improve the flexibility of use and the accuracy of the flattening operation, and are convenient to use.

[0043] Example 2:

[0044] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the flattening component 3 of the utility model, see Figure 3 and Figure 4 .

[0045] The flattening assembly 3 of this embodiment includes a spherical adjustment seat 34, which is arranged between the movable positioning plate 31 and the pressure head 33. The spherical adjustment seat 34 includes a seat body 341 and a ball 342. The seat body 341 and the ball 342 are connected by a ball head. The seat body 341 can rotate relative to the ball 342 to achieve fine-angle adjustment. Among them, the ball 342 is detachably connected to the movable positioning plate 31. As shown in some specific embodiments, the ball 342 is a semi-circular sphere 342, and the ball 342 and the movable positioning plate 31 can be assembled by bolts. At the same time, the seat body 341 and the pressure head 33 are detachably connected. Specifically, a connecting seat 331 is provided between the seat body 341 and the pressure head 33. The connecting seat 331 is connected to the seat body 341 and is detachably connected to the pressure head 33. As shown in some specific embodiments, the connecting seat 331 can be assembled with the pressure head 33 by bolts.

[0046] When the seat body 341 and the sphere 342 rotate relative to each other, the seat body 341 drives the connecting seat 331 and the pressing head 33 to rotate, so that the pressing head 33 rotates to a state parallel to the tab. The spherical adjustment seat 34 has a simple structure and is easy to use. The pressing head 33 can be flexibly adjusted according to the fixed position and angle of the cylindrical battery cell 8. In addition, the pressing head 33 is detachably connected to the seat body 341 via the connecting seat 331, which facilitates timely replacement of the pressing head 33 if damaged, thereby ensuring the quality of the tab flattening.

[0047] In a preferred embodiment, the seat 341 includes a connecting section 3411 that extends through the movable positioning plate 31 to the side of the movable positioning plate 31 away from the seat 341. The locking member 4 includes a nut 41 that is threadedly connected to the connecting section 3411. The nut 41 is located on the side of the movable positioning plate 31 away from the seat 341 to restrict movement of the seat 341. An elastic member 42 is disposed between the nut 41 and the movable positioning plate 31. The elastic member 42 is preferably, but not limited to, a spring. The elastic member 42 is sleeved on the connecting section 3411 and is threadedly connected to the connecting section 3411 to adjust the degree of compression of the elastic member 42. The elastic member 42 abuts against the corresponding sides of the nut 41 and the movable positioning plate 31, respectively, so that the seat 341 presses against the surface of the ball 342. The spherical adjustment seat 34 is locked, and the seat 341 is difficult to rotate freely relative to the ball 342. After the angle of the pressure head 33 is adjusted through the spherical adjustment seat 34 , the nut 41 is tightened to put the elastic member 42 in a compressed and tight state, and the spherical adjustment seat 34 is self-locking.

[0048] In a preferred embodiment, a dust collecting part 7 is provided on the movable positioning plate 31. As shown in some specific embodiments, the dust collecting part 7 includes an air knife 71. The dust collecting port of the air knife 71 is arranged opposite to the pressure head 33. The dust collecting part 7 can absorb the metal powder generated by the tab during the flattening process, reduce the influence of the falling metal powder on the flattening forming effect, and reduce the pollution of the production environment caused by the diffusion of metal powder.

[0049] Example 3:

[0050] The difference between this embodiment and the above embodiment is that, see Figures 3-5In this embodiment, a mounting seat 35 is provided on one side of the movable positioning plate 31, and the mounting seat 35 is transmission-connected to the first flattening drive member 32. In a preferred embodiment, the first flattening drive member 32 includes a first slider 322, and the first slider 322 is detachably connected to the mounting seat 35. Specifically, the first slider 322 and the mounting seat 35 can be assembled with bolts to facilitate daily maintenance. The first slider 322 is transmission-connected to the first motor 323. Specifically, the first motor 323 preferably, but not limited to, uses a first screw to drive the first slider 322 to move. The output end of the first motor 323 is drive-connected to the first screw, and the first slider 322 is threadedly connected to the first screw. The first motor 323 drives the first screw to rotate to drive the first slider 322 to move along the first screw. The first slider 322 is slidably connected to the first linear guide rail 321. The first motor 323 drives the first slider 322 to slide along the first linear guide rail 321 to approach or move away from the pole ear. The first slider 322 drives the movable positioning plate 31 and the pressure head 33 to move.

[0051] In a preferred embodiment, a force sensor 5 is provided on the side of the movable positioning plate 31 away from the spherical adjustment seat 34 , and the force sensor 5 is located between the movable positioning plate 31 and the mounting seat 35 , and the sensing end of the force sensor 5 is passed through the movable positioning plate 31 .

[0052] In some specific embodiments shown, the mounting seat 35 is slidably connected to the movable positioning plate 31, and the movable positioning plate 31 moves closer to or away from the tab on the mounting seat 35. A second slider 36 is provided on the side of the movable positioning plate 31 close to the mounting seat 35. The second slider 36 is detachably connected to the movable positioning plate 31. Specifically, the second slider 36 and the movable positioning plate 31 can be assembled by bolts. The second slider 36 is slidably connected to the second linear guide 37. When the movable positioning plate 31 slides relative to the mounting seat 35, the second slider 36 moves along the second linear guide 37, and the second slider 36 drives the movable positioning plate 31 closer to or away from the tab.

[0053] In the process of the pressure head 33 approaching to flatten the pole ear, the first flattening drive member 32 drives the mounting seat 35 to approach the pole ear, and the mounting seat 35 drives the movable positioning plate 31 to approach the pole ear, and then the movable positioning plate 31 drives the pressure head 33 to approach and gradually flatten the pole ear. In the process of the pressure head 33 approaching and flattening the pole ear, the pressure head 33 cooperates with the second slider 36 through the second linear guide 37 under the reaction of the force, and the pressure head 33 and the movable positioning plate 31 slide to transmit the force to the force sensor 5. The force sensor 5 detects the clamping force of the pressure head 33 to compress the pole ear, which is conducive to ensuring that the clamping force of the cylindrical battery cell 8 at the pole ears at both ends is the same, ensuring that the pole ears at both ends can obtain component flattening, and ensuring consistent flattening effect, which is conducive to controlling the clamping force and degree of the pressure head 33 to flatten the pole ear, and achieving precise flattening.

[0054] See Figure 6 In a preferred embodiment, a support plate 61 is provided on one side of the positioning seat 1, and a CCD assembly 6 is provided on the support plate 61. The CCD assembly 6 can measure the distance between the two end ears on the cylindrical battery cell 8. The way in which the CCD assembly 6 detects the distance between the two end ears is known to those skilled in the art and is feasible, and is not described in detail in this embodiment. In some specific embodiments as shown, a waist-shaped hole is provided on the support plate 61, and the waist-shaped hole is specifically opened at an angle. The CCD assembly 6 is detachably connected to the support plate 61 at the waist-shaped hole. Specifically, the CCD assembly 6 and the support plate 61 can be assembled by bolts, and the CCD assembly 6 adjusts the installation position on the support plate 61 along the waist-shaped hole so that the CCD assembly 6 can adjust the shooting range according to the specifications of the cylindrical battery cell 8. The CCD assembly 6 completely shoots the cylindrical battery cell 8 to ensure the accuracy of the photographic measurement results. The CCD component 6 takes a photo to measure the distance between the two end tabs on the cylindrical battery cell 8, and the signal is transmitted to the first motor 323 to drive different strokes, so that the flattening components 3 at both ends of the cylindrical battery cell 8 can flatten the tabs at the same time and ensure the same distance, so that the tabs have a good flattening effect.

[0055] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0058] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. Tab flattening and forming mechanism, characterized in that: include A positioning seat (1), wherein the positioning seat (1) is provided with a positioning groove (11) for placing a battery cell; A pressing assembly (2), provided on one side of the positioning seat (1), for pressing and fixing the battery core in the positioning groove (11); A flattening assembly (3) is provided on one side of the positioning seat (1), and the flattening assembly (3) includes a movable positioning plate (31). The movable positioning plate (31) is transmission-connected to a first flattening driving member (32). The flattening driving member drives the movable positioning plate (31) to move closer to or away from the pole lug. A pressing head (33) is rotatably provided on the movable positioning plate (31), and the pressing head (33) rotates to be parallel to the pole lug to flatten the pole lug.

2. The tab flattening and forming mechanism according to claim 1, characterized in that: A locking member (4) for locking the pressing head (33) is provided between the pressing head (33) and the movable positioning plate (31); A spherical adjustment seat (34) is provided between the pressure head (33) and the movable positioning plate (31), and the spherical adjustment seat (34) includes a seat body (341) and a sphere (342). The seat body (341) and the sphere (342) are connected by a ball head. The seat body (341) and the pressure head (33) are detachably connected, and the sphere (342) and the movable positioning plate (31) are detachably connected. The locking member (4) is provided between the seat body (341) and the movable positioning plate (31).

3. The tab flattening and forming mechanism according to claim 2, characterized in that: The seat (341) includes a connecting section (3411), and the connecting section (3411) is provided on the movable positioning plate (31); the locking member (4) includes a nut (41) threadedly connected to the end of the connecting section (3411) passing through the movable positioning plate (31) to limit the movement of the seat (341), wherein the seat (341) abuts against the ball (342); and The elastic member (42) is sleeved on the end of the connecting section (3411) passing through the movable positioning plate (31) and is located between the nut (41) and the corresponding side of the movable positioning plate (31). The elastic member (42) is respectively in contact with the nut (41) and the movable positioning plate (31).

4. The tab flattening and forming mechanism according to claim 1, characterized in that: The flattening assembly (3) further comprises a mounting seat (35), the mounting seat (35) being in transmission connection with the first flattening driving member (32), and the movable positioning plate (31) being in sliding connection with the mounting seat (35).

5. The tab flattening and forming mechanism according to claim 4, characterized in that: A force sensor (5) for detecting the pressure when the tab is flattened is provided between the mounting seat (35) and the movable positioning plate (31).

6. The tab flattening and forming mechanism according to claim 1, characterized in that: Two groups of the flattening components (3) are provided, and the two groups of the flattening components (3) are arranged opposite to the tabs of the respective battery cells.

7. The tab flattening and forming mechanism according to claim 6, characterized in that: A CCD component (6) is provided on one side of the positioning seat (1), and the CCD component (6) measures the distance between the two end tabs on the battery cell.

8. The tab flattening and forming mechanism according to claim 1, characterized in that: The pressing assembly (2) comprises a pressing block (21), and the pressing block (21) is transmission-connected to a pressing drive member (22) for driving the pressing block (21) to move up and down to press or release the battery cell.

9. The tab flattening and forming mechanism according to claim 1, characterized in that: The movable positioning plate (31) is provided with a dust collecting member (7) for collecting metal powder generated during flattening.

10. The tab flattening and forming mechanism according to claim 9, characterized in that: The dust collecting member (7) comprises an air knife (71), and the dust collecting port of the air knife (71) is arranged opposite to the pressure head (33).

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