Bending mechanism and tab processing machine

Abstract

The utility model discloses a bending mechanism and a pole lug processing machine, the bending mechanism comprises a first bending unit, a second bending unit and a feeding unit, the first bending unit and the second bending unit are sequentially arranged on a first station and a second station of a machine table; the feeding unit is arranged on the machine table and movably connected with the first bending unit and the second bending unit in a butt joint mode, and the feeding unit is used for conveying a carrier clamping a battery cell from a first station to a second station and discharging the battery cell bent and formed at the second station; the first bending unit is used for inwards bending the target tab of the battery cell located at the first station from a preset first fold line and forming a first fold angle; and the second bending unit is used for carrying out Z-shaped bending on the first bent angle and forming a Z-shaped bent angle after the first bent angle located at the second station is clamped, and the problems that the machining efficiency is low and the consistency is poor due to the fact that the tab is manually bent are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery preparation equipment technical field especially relates to bending mechanism and pole lug processing machine. BACKGROUND

[0002] In the related art, during the processing of the laminated sheet or the multi-pole lug wound battery, a pole lug sheet is welded on the initial pole lug of the battery cell, and then the pole lug is folded, so that the length of the target pole lug formed by welding reaches the set requirement after the folded pole lug is flattened. In the related art, the folded pole lug after welding is folded manually, but manual operation is not only inefficient, but also has poor consistency in folding effect, which affects the subsequent process flow and reduces the processing efficiency of the battery cell. At the same time, manual folding of the pole lug is prone to fatigue of the folding personnel and also prone to scratching by the personnel.

[0003] However, there is no effective solution to the problem of low processing efficiency and poor consistency in folding the pole lug manually in the related art. SUMMARY

[0004] Therefore, it is necessary to provide a bending mechanism and a pole lug processing machine to at least solve the problem of low processing efficiency and poor consistency in folding the pole lug manually in the related art.

[0005] In a first aspect, an embodiment of the present application provides a bending mechanism for bending a welded pole lug, comprising a machine table, a first bending unit, a second bending unit and a feeding unit. The first bending unit and the second bending unit are sequentially arranged at a first station and a second station of the machine table. The feeding unit is arranged on the machine table and is in movable connection with the first bending unit and the second bending unit. The feeding unit is configured to convey a carrier clamping a battery cell from the first station to the second station and to discharge the battery cell after the battery cell is folded and formed at the second station. The first bending unit is configured to inwardly bend a target pole lug of the battery cell at the first station from a preset first folding line and form a first folding angle. The second bending unit is configured to Z-fold the first folding angle after clamping the first folding angle at the second station and form a Z-folding angle.

[0006] In some embodiments, the first bending unit comprises a first mounting base and a second mounting base arranged at intervals on the machine table, the first mounting base is fixedly connected with a support plate arranged obliquely, the support plate is provided with two bending transmission assemblies arranged opposite to each other, the two bending transmission assemblies are respectively connected with a lower bending knife and an upper bending knife, the second mounting base is provided with a material lifting transmission assembly arranged vertically, the material lifting transmission assembly is connected with a pressing knife, wherein, after the target tab is conveyed to the first station, the material lifting transmission assembly drives the pressing knife to move vertically and press against the first folding line, the upper bending knife is driven by the corresponding bending transmission assembly to move obliquely downward and press against the first folding line, so that the pressing knife and the upper bending knife clamp the target tab at the first folding line, the lower bending knife is driven by the corresponding bending transmission assembly to move obliquely upward, and the target tab clamped by the pressing knife and the upper bending knife is folded upward from the first folding line until the head end surface of the target tab is attached to the back surface of the upper bending knife, so as to be bent and formed into the first folding angle, wherein the first folding angle comprises a long folding surface and a bottom folding surface, and the head end surface is located on the long folding surface.

[0007] In some embodiments, the bending transmission assembly and the material lifting transmission assembly each comprise one of the following: an electric cylinder, a linear module, and / or the feeding unit comprises one of the following: a linear conveyor, a gap type separation rotating disc.

[0008] In some embodiments, the second bending unit comprises a top pressing assembly, a lower pressing assembly, a horizontal pushing assembly and a horizontal bending assembly. The top pressing assembly is arranged on the machine and directly below the carrier at the second station. The lower pressing assembly and the horizontal pushing assembly are arranged on a support seat, and the lower pressing assembly is arranged obliquely so that the lower pressing knife of the lower pressing assembly is aligned with the first fold line of the first corner at the second station. The horizontal pushing assembly is arranged horizontally, and the horizontal pushing knife of the horizontal pushing assembly is aligned with the long fold surface of the first corner. A gantry is arranged beside the support seat, and the horizontal bending assembly is connected to the gantry and arranged opposite the horizontal pushing assembly. When the battery cell with the first corner is transferred to the second station, the top pushing knife and the lower pressing knife are respectively driven to move vertically and obliquely downward, and press the bottom and top of the bottom fold surface of the corresponding first corner, so that the top pushing knife and the lower pressing knife clamp the first corner at the second station. The horizontal pushing knife is driven to move towards the corresponding first corner and abut against the first fold line of the first corner to press the corner of the first corner. After the corner of the first corner is pressed, the horizontal bending knife of the horizontal bending assembly is driven to move towards the horizontal pushing knife until it abuts against the long fold surface after passing through the lower pressing knife, and the long fold surface is bent in reverse until it is pressed against the top of the horizontal pushing knife to form a Z-shaped bend to form a Z-shaped corner.

[0009] In some embodiments, the top pressing assembly further comprises a top pressing driving unit arranged on a third mounting seat movably connected to the machine. The top pressing driving unit is in transmission connection with the top pushing knife and is used to drive the top pushing knife to move vertically to press or release the bottom fold surface of the first corner. The top pushing knife contacts the bottom fold surface at the first fold line of the corresponding first corner.

[0010] In some embodiments, the lower pressing assembly further comprises a lower pressing driving unit arranged obliquely on the inclined side plate of the support seat and in transmission connection with the lower pressing knife. The lower pressing driving unit is used to drive the lower pressing knife to move obliquely downward so that the lower pressing knife presses the top of the bottom fold surface. The lower pressing knife presses the bottom fold surface at the first fold line of the first corner, and the long fold surface is attached to the back of the lower pressing knife.

[0011] In some embodiments, the horizontal pushing assembly further comprises a horizontal pushing driving unit horizontally arranged on the inclined side plate. The horizontal pushing driving unit is in transmission connection with the horizontal pushing knife and is used to drive the horizontal pushing knife to move towards or away from the corresponding first corner to press the corner of the first corner.

[0012] In some embodiments, the lower pressing knife is further provided with a meandering groove, the horizontal bending assembly further comprises a horizontal moving driving unit, a vertical plate and a material pressing driving unit, the horizontal moving driving unit is arranged on the gantry and is in transmission connection with the vertically arranged vertical plate, the material pressing driving unit is vertically fixed on the vertical plate and is in transmission connection with the horizontal pushing bending knife, wherein,

[0013] The horizontal moving driving unit is used for driving the vertical plate to drive the material pressing driving unit and the horizontal pushing bending knife to move horizontally.

[0014] The material pressing driving unit is used for driving the horizontal pushing bending knife to move vertically to the horizontal pushing bending knife capable of moving horizontally through the meandering groove, and pressing the long bending surface on the top of the horizontal pushing knife to form a Z-shaped bending angle during the horizontal movement of the horizontal pushing bending knife through the meandering groove.

[0015] In some embodiments, the top pressing driving unit, the lower pressing driving unit, the horizontal pushing driving unit and the horizontal moving driving unit each comprise one of the following: an electric cylinder, a linear module, and / or the material pressing driving unit comprises one of the following: a driving air cylinder, a linear motor.

[0016] In a second aspect, the embodiments of the present application further provide a tab processing machine, comprising a tab bending mechanism, and the tab bending mechanism comprises the bending mechanism of the first aspect.

[0017] Compared with the prior art, the embodiments of the present application provide a bending mechanism and a tab processing machine, which comprise a first bending unit, a second bending unit and a feeding unit, the first bending unit and the second bending unit are arranged in sequence on a first station and a second station of a machine table, and the feeding unit is arranged on the machine table and is in movable butt joint with the first bending unit and the second bending unit, wherein the feeding unit is used for conveying a carrier clamping a battery cell from the first station to the second station and discharging the battery cell after the battery cell is formed by bending in the second station, the first bending unit is used for inward bending a target tab of the battery cell located at the first station from a preset first fold line and forming a first bending angle, and the second bending unit is used for Z-shaped bending the first bending angle after clamping the first bending angle located at the second station and forming a Z-shaped bending angle, thereby solving the problems of low processing efficiency and poor consistency caused by manual bending of the tab, realizing rapid bending of the welded tab, and improving the consistency of the product and the beneficial effect of improving the tab bending processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a perspective view of a bending mechanism according to an embodiment of the present application;

[0019] Figure 2 is a perspective view of a first bending unit of an embodiment of the present application;

[0020] Figure 3 is an assembly schematic view of the first bending unit of an embodiment of the present application and a carrier;

[0021] Figure 4 is Figure 3 is an enlarged view of part A in the middle;

[0022] Figure 5 is a perspective view of a second bending unit of an embodiment of the present application;

[0023] Figure 6 is an assembly schematic view of the second bending unit of an embodiment of the present application and a carrier;

[0024] Figure 7 is Figure 6 is an enlarged view of part B in the middle.

[0025] ACCOMPA

[0026] 001, first station; 002, second station;

[0027] 01, battery cell; 02, target tab; 03, first folding corner; 04, Z folding corner; 05, long folding surface; 06, bottom folding surface;

[0028] 100, machine table;

[0029] 200, first bending unit; 21, first mounting seat; 22, second mounting seat; 23, support plate; 24, bending transmission assembly; 25, lower bending knife; 26, upper bending knife; 27, material lifting transmission assembly; 28, pressing knife;

[0030] 300, second bending unit; 31, pressing assembly; 32, pressing-down assembly; 33, horizontal pushing assembly; 34, horizontal bending assembly; 35, support seat; 36, gantry; 37, third mounting seat; 311, pushing knife; 312, pressing driving unit; 321, pressing-down knife; 322, pressing-down driving unit; 323, meandering groove; 331, horizontal pushing knife; 332, horizontal pushing driving unit; 341, horizontal pushing and bending knife; 342, horizontal moving driving unit; 343, vertical plate; 344, material pressing driving unit; 351, inclined side plate;

[0031] 400, feeding unit;

[0032] 500, carrier. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there can be a middle component. When a component is referred to as being "provided on" another component, it can be directly provided on the other component or there can be a middle component. When a component is referred to as being "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] Referring to Figures 1 to 7 The embodiment of the present application provides a specific embodiment of a bending mechanism. The illustrated bending mechanism comprises a machine table 100, a first bending unit 200, a second bending unit 300 and a feeding unit 400. The first bending unit 200 and the second bending unit 300 are sequentially arranged on a first station 001 and a second station 002 of the machine table 100. The feeding unit 400 is arranged on the machine table 100 and is in active connection with the first bending unit 200 and the second bending unit 300, respectively. In the embodiment, the feeding unit 400 comprises a linear conveyor 401 and a rotary disc 402.

[0037] The feeding unit 400 is used for conveying the carrier 500 holding the battery cell 01 from the first station 001 to the second station 002, and is used for discharging the battery cell 01 which is formed by bending in the second station 002.

[0038] In some optional embodiments, the feeding unit 400 comprises but is not limited to one of the following: a linear conveyor, a gap type separation rotary disc, preferably an intermittent separation rotary disc.

[0039] The first bending unit 200 is used for inwardly bending the target tab 02 of the battery cell 01 located at the first station 001 from a preset first bending line, and forming a first bending angle 03.

[0040] In the embodiment, at the first station 001, the target tab 02 of the battery cell 01 extends to below the first bending unit 200. At this time, the first bending unit 200 clamps the first folding line of the target tab 02 first, then tilts and pushes the head end surface of the target tab 02 inward to perform inward folding, and forms a first folding angle 03. In the embodiment, the angle of the first folding angle 03 is 70° to 80°, and preferably 75°. In the embodiment, the shape of the first folding angle 03 is “∠”.

[0041] The second bending unit 300 is used for Z-shaped bending and forming a Z-shaped folding angle 04 of the first folding angle 03 after clamping the first folding angle 03 at the second station 002.

[0042] In the embodiment, the carrier 500 holding the corresponding battery cell 01 is rotated to the second station 002, and the first folding angle 03 is located below the second bending unit 300. At this time, the second bending unit 300 clamps the first folding angle 03 first, and reverses the Z-shaped folding of the long folding surface 05 of the first folding angle 03 from the second folding line (corresponding to the position where the horizontal pushing knife 331 contacts the long folding edge 05) of the first folding angle 03, and bends it into a Z-shaped folding angle 04.

[0043] In the above bending mechanism, the feeding unit 400 is used to convey the carrier 500 holding the battery cell 01 from the first station 001 to the second station 002. The target tab 02 of the battery cell 01 at the first station 001 is inwardly bent from the preset first folding line by the first bending unit 200, and a first folding angle 03 is formed. After the first folding angle 03 at the second station 002 is clamped by the second bending unit 300, the first folding angle 03 is Z-shaped bent and formed into a Z-shaped folding angle 04. The above-mentioned bending mechanism solves the problem of low processing efficiency and poor consistency in the related art by using manual tab bending, and realizes rapid bending of the welded tab, thereby improving the consistency of the product and the processing efficiency of the tab bending.

[0044] To bend the first folding angle 03 on the target tab 02, refer to Figures 1 to 4 In some embodiments, the first bending unit 200 includes a first mounting seat 21 and a second mounting seat 22 spaced apart on the machine table 100. The first mounting seat 21 is fixedly connected with an obliquely arranged support plate 23. The support plate 23 is provided with two oppositely arranged bending transmission assemblies 24. The two bending transmission assemblies 24 are respectively drivingly connected with a lower bending knife 25 and an upper bending knife 26. The second mounting seat 22 is provided with a vertically arranged material pushing transmission assembly 27. The material pushing transmission assembly 27 is drivingly connected with a pressing knife 28.

[0045] After the target tab 02 is transferred to the first station 001, the top pressing driving assembly 27 drives the top pressing knife 28 to move vertically and press to the first folding line, the upper folding knife 26 is driven by the corresponding folding driving assembly 24 to move obliquely downward and press to the first folding line, so that the top pressing knife 28 and the upper folding knife 26 clamp the target tab 02 at the first folding line, and the lower folding knife 25 is driven by the corresponding folding driving assembly 24 to move obliquely upward, so that the target tab 02 clamped by the top pressing knife 28 and the upper folding knife 26 is folded upward from the first folding line until the head end surface of the target tab 02 abuts against the back surface of the upper folding knife 26, so as to be folded and formed into the first folding angle 03, wherein the first folding angle 03 includes a long folding surface 05 and a bottom folding surface 06, and the head end surface is located on the long folding surface 05.

[0046] In the embodiment, the angle of the first folding angle 03 is 70° to 80°, preferably 75°; in the embodiment, the shape of the first folding angle 03 is “∠”; in the embodiment, the folding driving assembly 24 and the top pressing driving assembly 27 each include one of the following: an electric cylinder and a linear module.

[0047] In order to realize the folding of the target tab 02 in a preset shape and the Z-folding of the first folding angle 03, with reference to Figure 1 、 Figures 5 to 7 In some embodiments, the second folding unit 300 includes a top pressing assembly 31, a lower pressing assembly 32, a horizontal pushing assembly 33 and a horizontal folding assembly 34, the top pressing assembly 31 is arranged on the machine table 100 and located directly below the carrier 500 located at the second station 002, the lower pressing assembly 32 and the horizontal pushing assembly 33 are arranged on the support base 35, and the lower pressing assembly 32 is arranged obliquely so that the lower pressing knife 321 of the lower pressing assembly 32 is aligned with the first folding line of the first folding angle 03 located at the second station 002, the horizontal pushing assembly 33 is arranged horizontally, and the horizontal pushing knife 331 of the horizontal pushing assembly 33 is aligned with the long folding surface 05 of the first folding angle 03, the gantry 36 is arranged beside the support base 35, the horizontal folding assembly 34 is connected with the gantry 36, and the horizontal folding assembly 34 is arranged opposite to the horizontal pushing assembly 33, wherein

[0048] When the battery cell 01 with the formed first folding angle 03 is transferred to the second station 002, the top pushing knife 311 and the lower pressing knife 321 of the top pressing assembly 31 are respectively driven to move vertically and obliquely downward, and press the bottom and top of the bottom folding surface 06 of the corresponding first folding angle 03 respectively, so that the top pushing knife 311 and the lower pressing knife 321 clamp the first folding angle 03 located at the second station 002;

[0049] The horizontal pushing knife 331 is driven to move towards the corresponding first folding angle 03 and abut against the first folding line of the first folding angle 03 to press the folding angle of the first folding angle 03;

[0050] After the corner of the first corner 03 is pressed, the horizontal pushing and bending knife 341 of the horizontal pushing and bending assembly 34 is driven to move towards the horizontal pushing knife 331 until it is pressed against the long bending surface 05 after passing through the lower pressing knife 321, and the long bending surface 05 is reversely bent until it is pressed against the top of the horizontal pushing knife 331, so as to be formed into a Z-shaped corner 04.

[0051] It should be noted that when the first corner 03 is pressed by the horizontal pushing knife 311 and the lower pressing knife 321, the long bending surface 05 of the first corner 03 is pressed against the back surface of the lower pressing knife 321, and the horizontal pushing knife 311 is pressed against the corner of the first corner 03 (corresponding to the first fold line). After that, the horizontal pushing knife 331 is driven to move horizontally to the corner of the first corner 03, and the lower pressing knife 321 is located on both sides of the long bending surface 05 (corresponding to the inner and outer sides of the long bending surface 05), because the horizontal pushing knife 331 has a certain thickness, the horizontal pushing and bending knife 341 is driven to move towards the horizontal pushing knife 331, and is pressed against the long bending surface 05 of the first corner 03 after passing through the lower pressing knife 321. After that, the horizontal pushing and bending knife 341 continues to push the long bending surface 05 to start to fold the long bending surface 05 outward (the second fold line corresponding to the outward folding is the contact position between the top of the horizontal pushing knife 331 and the long bending surface 05), until the long bending surface 05 is pressed against the top of the horizontal pushing knife 331, so as to realize the Z-shaped bending of the target tab 02, and form the Z-shaped corner 04.

[0052] In some optional embodiments, the top pressing assembly 31 further comprises a top pressing driving unit 312, which is arranged on the third mounting seat 37 movably connected with the machine table 100, and is in transmission connection with the horizontal pushing knife 311 and used for driving the horizontal pushing knife 311 to move vertically to press or release the bottom bending surface 06 of the first corner 03, wherein the horizontal pushing knife 311 contacts the bottom bending surface 06 at the first fold line of the corresponding first corner 03.

[0053] In the embodiment, the top pressing driving unit 312 includes but is not limited to one of the following: an electric cylinder and a linear module.

[0054] In some optional embodiments, the lower pressing assembly 32 further comprises a lower pressing driving unit 322, which is arranged on the inclined side plate 351 of the support seat 35 in an inclined manner and is in transmission connection with the lower pressing knife 321, and is used for driving the lower pressing knife 321 to move downward in an inclined manner to press the lower pressing knife 321 on the top of the bottom bending surface 06, wherein the lower pressing knife 321 presses the bottom bending surface 06 at the first fold line of the first corner 03, and the long bending surface 05 is pressed against the back surface of the lower pressing knife 321.

[0055] In the embodiment, the lower pressing driving unit 322 includes but is not limited to one of the following: an electric cylinder and a linear module.

[0056] In some optional embodiments, the horizontal pushing assembly 33 further comprises a horizontal pushing driving unit 332 horizontally arranged on the inclined side plate 351, the horizontal pushing driving unit 332 is in transmission connection with the horizontal pushing knife 331 and is used to drive the horizontal pushing knife 331 to move towards or away from the corresponding first bending angle 03 to press the bending angle of the first bending angle 03.

[0057] In the embodiment, the horizontal pushing driving unit 332 includes but is not limited to one of the following: an electric cylinder, a linear module.

[0058] In some optional embodiments, the downward pressing knife 321 is further provided with a meandering groove 323, and the horizontal bending assembly 34 further comprises a horizontal moving driving unit 342, a vertical plate 343 and a pressing driving unit 344, the horizontal moving driving unit 342 is arranged on the gantry 36 and is in transmission connection with the vertically arranged vertical plate 343, the pressing driving unit 344 is vertically fixed on the vertical plate 343 and is in transmission connection with the horizontal pushing bending knife 341, wherein,

[0059] The horizontal moving driving unit 342 is used to drive the vertical plate 343 to drive the pressing driving unit 344 and the horizontal pushing bending knife 341 to move horizontally;

[0060] The pressing driving unit 344 is used to drive the horizontal pushing bending knife 341 to move vertically to the horizontal pushing bending knife 341 which can move horizontally through the meandering groove 323, and in the process of the horizontal pushing bending knife 341 moving horizontally through the meandering groove 323, the long bending surface 05 is pressed and attached to the top of the horizontal pushing knife 331 to be Z-shaped bent to form the Z-shaped bending angle 04.

[0061] In the embodiment, the horizontal moving driving unit 342 includes but is not limited to one of the following: an electric cylinder, a linear module, and the pressing driving unit 344 includes but is not limited to one of the following: a driving air cylinder, a linear motor.

[0062] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0063] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application, and as long as the above embodiments are appropriately changed and changed within the scope of the spirit of the present application, they fall within the scope of the present application.

Claims

1. A bending mechanism for a bending of a tab for welding, characterized by, The device comprises a machine table (100), a first bending unit (200), a second bending unit (300) and a feeding unit (400). The first bending unit (200) and the second bending unit (300) are sequentially arranged on the first work station (001) and the second work station (002) of the machine table (100). The feeding unit (400) is arranged on the machine table (100) and is in active connection with the first bending unit (200) and the second bending unit (300) respectively. The feeding unit (400) is used for conveying the carrier (500) clamping the battery cell (01) from the first work station (001) to the second work station (002) and discharging the battery cell (01) after the bending forming is completed at the second work station (002). The first bending unit (200) is used for inwardly bending the target tab (02) of the battery cell (01) at the first work station (001) from a preset first folding line and forming a first folding angle (03). The second bending unit (300) is used for Z-shaped bending the first folding angle (03) after clamping the first folding angle (03) at the second work station (002) and forming a Z-shaped folding angle (04).

2. The bending mechanism according to claim 1, characterized in that The first bending unit (200) comprises a first mounting seat (21) and a second mounting seat (22) which are arranged at intervals on the machine table (100). The first mounting seat (21) is fixedly connected with an inclined support plate (23). Two bending transmission assemblies (24) are arranged on the support plate (23) in a facing manner. The two bending transmission assemblies (24) are respectively connected with a lower bending knife (25) and an upper bending knife (26) through transmission. A vertical material lifting transmission assembly (27) is arranged on the second mounting seat (22). The material lifting transmission assembly (27) is connected with a pressing knife (28) through transmission. After the target tab (02) is conveyed to the first work station (001), the material lifting transmission assembly (27) drives the pressing knife (28) to move vertically and press at the first folding line. The upper bending knife (26) is driven by the corresponding bending transmission assembly (24) to move obliquely downward and press at the first folding line, so that the pressing knife (28) and the upper bending knife (26) clamp the target tab (02) at the first folding line. The lower bending knife (25) is driven by the corresponding bending transmission assembly (24) to move obliquely upward and fold the target tab (02) clamped by the pressing knife (28) and the upper bending knife (26) upward from the first folding line until the head end surface of the target tab (02) is attached to the back surface of the upper bending knife (26), so as to form the first folding angle (03). The first folding angle (03) comprises a long folding surface (05) and a bottom folding surface (06). The head end surface is located on the long folding surface (05).

3. The bending mechanism according to claim 2, wherein The bending transmission assembly (24) and the material pushing transmission assembly (27) each include one of the following: an electric cylinder, a linear module, and / or the feeding unit (400) includes one of the following: a linear conveyor, a gap type separation rotating disc.

4. The bending mechanism according to claim 2, wherein The second bending unit (300) includes a top pressing assembly (31), a lower pressing assembly (32), a horizontal pushing assembly (33), and a horizontal bending assembly (34). The top pressing assembly (31) is arranged on the machine table (100) and directly below the carrier (500) located at the second station (002). The lower pressing assembly (32) and the horizontal pushing assembly (33) are arranged on a support seat (35), and the lower pressing assembly (32) is arranged obliquely so that the lower pressing knife (321) of the lower pressing assembly (32) is aligned with the first bending line of the first corner (03) located at the second station (002). The horizontal pushing assembly (33) is arranged horizontally, and the horizontal pushing knife (331) of the horizontal pushing assembly (33) is aligned with the long bending surface (05) of the first corner (03). A gantry (36) is arranged beside the support seat (35), the horizontal bending assembly (34) is connected with the gantry (36), and the horizontal bending assembly (34) is arranged opposite to the horizontal pushing assembly (33). When the battery cell (01) in which the first corner (03) is formed is conveyed to the second station (002), the top pushing knife (311) and the lower pressing knife (321) of the top pressing assembly (31) are respectively driven to move vertically and obliquely downward, and press the bottom and top of the bottom bending surface (06) of the corresponding first corner (03), so that the top pushing knife (311) and the lower pressing knife (321) clamp the first corner (03) located at the second station (002). The horizontal pushing knife (331) is driven to move towards the corresponding first corner (03) and abut against the first bending line of the first corner (03) to press the corner of the first corner (03). After the corner of the first corner (03) is pressed, the horizontal bending knife (341) of the horizontal bending assembly (34) is driven to move towards the horizontal pushing knife (331) until it abuts against the long bending surface (05) after passing through the lower pressing knife (321), and reversely bends the long bending surface (05) until it is pressed against the top of the horizontal pushing knife (331) to form a Z-shaped bending to form a Z-shaped corner (04).

5. The bending mechanism according to claim 4, wherein The top pressing assembly (31) further includes a top pressing driving unit (312) arranged on a third mounting seat (37) movably connected with the machine table (100). The top pressing driving unit (312) is in transmission connection with the top pushing knife (311) and is used to drive the top pushing knife (311) to move vertically to press or release the bottom bending surface (06) of the first corner (03). The top pushing knife (311) contacts the bottom bending surface (06) at the first bending line of the corresponding first corner (03).

6. The bending mechanism according to claim 5, wherein The lower pressing assembly (32) further comprises a lower pressing driving unit (322) which is obliquely arranged on the inclined side plate (351) of the support base (35) and is in transmission connection with the lower pressing knife (321), and the lower pressing driving unit (322) is used for driving the lower pressing knife (321) to obliquely move downwards so that the lower pressing knife (321) is pressed on the top of the bottom folding surface (06), wherein the lower pressing knife (321) presses the bottom folding surface (06) at the first folding line of the first folding corner (03), and the long folding surface (05) is attached to the back of the lower pressing knife (321).

7. The bending mechanism according to claim 6, wherein The horizontal pushing assembly (33) further comprises a horizontal pushing driving unit (332) which is horizontally arranged on the inclined side plate (351), the horizontal pushing driving unit (332) is in transmission connection with the horizontal pushing knife (331), and is used for driving the horizontal pushing knife (331) to move towards or away from the corresponding first folding corner (03) so as to press the folding corner of the first folding corner (03).

8. The bending mechanism according to claim 7, wherein The lower pressing knife (321) is further provided with a meandering groove (323), and the horizontal folding and bending assembly (34) further comprises a horizontal moving driving unit (342), a vertical plate (343) and a material pressing driving unit (344), the horizontal moving driving unit (342) is arranged on the gantry (36) and is in transmission connection with the vertical plate (343), the material pressing driving unit (344) is vertically fixed on the vertical plate (343) and is in transmission connection with the horizontal pushing and bending knife (341), wherein, The horizontal moving driving unit (342) is used for driving the vertical plate (343) to drive the material pressing driving unit (344) and the horizontal pushing and bending knife (341) to move horizontally; The material pressing driving unit (344) is used for driving the horizontal pushing and bending knife (341) to vertically move to a position where the horizontal pushing and bending knife (341) can horizontally move through the meandering groove (323), and in the process that the horizontal pushing and bending knife (341) moves through the meandering groove (323) and horizontally moves, the long folding surface (05) is horizontally pressed and attached to the top of the horizontal pushing knife (331) to be Z-shaped folded and formed into a Z-shaped folding corner (04).

9. The bending mechanism of claim 8, wherein, The top pressing driving unit (312), the lower pressing driving unit (322), the horizontal pushing driving unit (332) and the horizontal moving driving unit (342) each comprise one of the following: an electric cylinder, a linear module, and / or the material pressing driving unit (344) comprises one of the following: a driving air cylinder and a linear motor.

10. A tab processing machine characterized by, The tab folding mechanism comprises the folding mechanism according to any one of claims 1 to 9. The tab folding mechanism comprises the folding mechanism according to any one of claims 1 to 9.

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