Emergency rapid automatic winding device

Abstract

The utility model discloses an emergency rapid automatic winding device, which comprises a first cutting mechanism, a second cutting mechanism, a second cutting mechanism, a third cutting mechanism and a fourth cutting mechanism, the first cutting mechanism is positioned on one side of a drying oven and comprises a first rack, a first belt cutting component and two first belt pressing components, the first belt cutting component and the two first belt pressing components are arranged on the first rack, and the first belt cutting component is positioned between the two first belt pressing components; the second cutting mechanism is located on the other side of the drying oven and comprises a second rack, a second belt cutting assembly and a second belt pressing assembly, and the second belt cutting assembly and the second belt pressing assembly are arranged on the second rack; the winding mechanism is used for winding a section of cut pole piece, the winding mechanism comprises a winding shaft, a third pressing belt assembly and a motor, the third pressing belt assembly is used for pressing the pole piece on the winding shaft, and the motor is used for driving the winding shaft to rotate. According to the utility model, automatic belt cutting and winding after power failure can be realized, the structure is compact, the arrangement is convenient, the requirement on a USP (uninterruptible power supply) load is lower, rapid winding can be realized, and the wound pole piece cannot be polluted.

Description

TECHNICAL FIELD

[0001] The utility model relates to coating equipment technical field, concretely relates to an emergency fast automatic winding device. BACKGROUND

[0002] The production of lithium battery includes unwinding, coating, drying and winding processes, specifically, the pole piece is unwound by the unwinding mechanism, the coating mechanism coats the pole piece with slurry, the pole piece needs to enter the oven for drying after coating, and finally is wound by the winding mechanism.

[0003] When in the emergency power-off state, the winding mechanism and the unwinding mechanism will stop working, and the pole piece will stop conveying, at this time, the oven still has a high temperature inside, and a section of the pole piece located in the oven is damaged due to continuous heating. The existing processing method is to power the winding mechanism by starting the UPS (uninterruptible power supply system), or to extract the pole piece in the oven by manual method.

[0004] When the UPS (uninterruptible power supply system) is started to power the winding mechanism, the existing winding mechanism is complex in structure, and has high requirements for the UPS (uninterruptible power supply system) load, and the winding speed is slow. For the pole piece coated with slurry, the slurry on the wound pole piece will pollute the wound substrate, resulting in batch rejection of the pole piece.

[0005] When the pole piece in the oven is extracted manually, the residual pole piece in the oven needs to be extracted manually, which is time-consuming and laborious, and is greatly affected by manual factors, and is prone to secondary belt breakage, resulting in pole piece retention in the oven. If the oven is shut down in the heating state, the temperature of the internal pole piece is high, and manual extraction of the pole piece is prone to scalding accidents. If the oven is cooled before taking, it usually takes several hours to cool down, which seriously affects the production progress. UTILITY MODEL CONTENTS

[0006] In order to overcome the shortcomings of the prior art, the utility model provides an emergency fast automatic winding device, which can realize automatic cutting and winding after power failure, is compact in structure, is convenient to arrange, has low requirements for the USP (uninterruptible power supply system) load, can realize fast winding, and will not pollute the wound pole piece.

[0007] The technical scheme adopted by the utility model to solve the technical problems is:

[0008] An emergency fast automatic winding device comprises:

[0009] The first cutting mechanism is located on one side of the oven and comprises a first rack, a first belt cutting assembly arranged on the first rack, and at least one first belt pressing assembly. The first belt cutting assembly is located on one side of the first belt pressing assembly. The first belt pressing assembly is used to press the pole piece, and the first belt cutting assembly is used to cut the pole piece.

[0010] The second cutting mechanism is located on the other side of the oven and comprises a second rack, a second belt cutting assembly arranged on the second rack, and a second belt pressing assembly. The second belt cutting assembly is located on one side of the second belt pressing assembly. The second belt pressing assembly is used to press the pole piece, and the second belt cutting assembly is used to cut the pole piece.

[0011] The winding mechanism is arranged on the second rack and is used to wind the cut pole piece. The second belt cutting assembly is located between the second belt pressing assembly and the winding mechanism. The winding mechanism comprises a winding shaft, a third belt pressing assembly, and a motor. The two ends of the winding shaft are respectively rotatably connected to the second rack. The third belt pressing assembly is used to press the pole piece on the winding shaft. The motor is used to drive the winding shaft to rotate.

[0012] As a further improvement of the above technical solution, the number of the first belt pressing assemblies is two, and the first belt cutting assembly is located between the two first belt pressing assemblies.

[0013] As a further improvement of the above technical solution, the flattening mechanism is located between the winding mechanism and the oven. The flattening mechanism comprises a passing roller, a pressing roller located above the passing roller, and a first driving member for driving the pressing roller to approach or move away from the passing roller. The pressing roller is parallel to the passing roller, and the pole piece is located between the pressing roller and the passing roller. Two vertically arranged wall plates are arranged on the second support. The two ends of the passing roller are respectively rotatably connected to the two wall plates.

[0014] As a further improvement of the above technical solution, the first driving member comprises two first air cylinders. The two first air cylinders are respectively mounted on the inner sides of the two wall plates. The output ends of the two first air cylinders are respectively provided with mounting seats. The two ends of the pressing roller are respectively rotatably connected to the two mounting seats.

[0015] As a further improvement of the above technical solution, the third belt pressing assembly comprises a first belt pressing rod and a second driving member. The first belt pressing rod is parallel to the winding shaft, and the pole piece is located between the first belt pressing rod and the winding shaft. The second driving member is used to drive the first belt pressing rod to approach or move away from the winding shaft.

[0016] As a further improvement of the above technical solution, the second driving member comprises two second air cylinders, the two second air cylinders are installed on the winding shaft, and the telescopic rods of the two second air cylinders are both through the winding shaft and are connected to the two ends of the first pressing belt rod respectively.

[0017] As a further improvement of the above technical solution, the winding mechanism further comprises a first material receiving box, the first material receiving box is installed on the second rack, and the first material receiving box is located directly below the winding shaft.

[0018] And / or, the first cutting mechanism further comprises a second material receiving box, the second material receiving box is installed on the first rack, and the second material receiving box is located directly below the first belt cutting assembly.

[0019] As a further improvement of the above technical solution, the first pressing belt assembly comprises a first support rod, a second pressing belt rod located directly above the first support rod, and a third driving member for driving the second pressing belt rod to move close to or away from the first support rod, the length direction of the first support rod and the second pressing belt rod both extend along the width direction of the pole piece.

[0020] As a further improvement of the above technical solution, the second pressing belt assembly comprises a second support rod, a third pressing belt rod located directly above the second support rod, and a fifth driving member for driving the third pressing belt rod to move close to or away from the second support rod, the length direction of the second support rod and the third pressing belt rod both extend along the width direction of the pole piece.

[0021] As a further improvement of the above technical solution, the first belt cutting assembly comprises a first cutting knife and a fourth driving member for driving the first cutting knife to move up and down, the first cutting knife is located directly above the pole piece, and the length direction of the first cutting knife extends along the width direction of the pole piece.

[0022] And / or, the second belt cutting assembly comprises a second cutting knife and a sixth driving member for driving the second cutting knife to move up and down, the second cutting knife is located directly above the pole piece, and the length direction of the second cutting knife extends along the width direction of the pole piece.

[0023] The utility model discloses an emergency fast automatic winding device, through setting up first cutting mechanism, second cutting mechanism and winding mechanism, when under the emergency power failure state, the UPS (uninterruptible power supply system) is used to the power supply of first cutting mechanism, second cutting mechanism and winding mechanism, two first pressure band components press the pole piece of oven one side, and the second pressure band component press the pole piece of oven other side, and the third pressure band component press the pole piece on the winding shaft, then, the first cutting band component cuts the pole piece of oven one side, and the second cutting band component cuts the pole piece of oven other side, then, the first pressure band component of oven one side loosens the pole piece after cutting, finally, the motor drives the winding shaft rotation, and the winding shaft carries out winding to the pole piece after cutting, thereby, can realize the automatic cutting band and winding after power failure, and the compact structure is convenient for the arrangement, and the lower USP (uninterruptible power supply system) load requirement can realize the fast winding, and will not cause the pollution to the pole piece after winding. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model is further illustrated below in connection with the drawings and examples.

[0025] Figure 1 It is the structure schematic diagram provided by the utility model one example;

[0026] Figure 2 It is Figure 1 The plan view of;

[0027] Figure 3 It is Figure 1 The section view of;

[0028] Figure 4 It is Figure 3 The section view of second cutting mechanism, winding mechanism and smoothing mechanism in

[0029] Figure 5 It is Figure 3 The section view of first cutting mechanism in

[0030] 100 - first cutting mechanism, 110 - first frame, 120 - first cutting strip assembly, 121 - first cutting knife, 122 - fourth driving member, 123 - first knife seat, 130 - first pressing strip assembly, 131 - first supporting rod, 132 - second pressing strip rod, 133 - third driving member, 140 - second receiving box, 200 - second cutting mechanism, 210 - second frame, 211 - wallboard, 220 - second cutting strip assembly, 221 - second cutting knife, 222 - sixth driving member, 223 - second knife seat, 230 - second pressing strip assembly, 231 - second supporting rod, 232 - third pressing strip rod, 233 - fifth driving member, 300 - winding mechanism, 310 - winding shaft, 320 - third pressing strip assembly, 321 - first pressing strip rod, 322 - second driving member, 330 - motor, 340 - first receiving box, 400 - smoothing mechanism, 410 - passing roller, 420 - pressing roller, 430 - first driving member, 431 - first air cylinder, 432 - mounting seat, 500 - oven, 600 - pole piece. DETAILED DESCRIPTION

[0031] The concept, specific structure and technical effects of the present application will be described clearly and completely in combination with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments, and other embodiments obtained by those skilled in the art without creative labor based on the embodiments of the present application all belong to the scope of protection of the present application. In addition, all the coupling / connection relationships involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation. The technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0032] REFERENCE Figures 1 to 5 The present application provides an emergency rapid automatic winding device, comprising a first cutting mechanism 100, a second cutting mechanism 200 and a winding mechanism 300.

[0033] The first cutting mechanism 100 and the second cutting mechanism 200 are respectively located on the two sides of the oven 500, and the winding mechanism 300 is located between the second cutting mechanism 200 and the oven 500.

[0034] The first cutting mechanism 100 comprises a first frame 110, a first cutting strip assembly 120 arranged on the first frame 110 and at least one first pressing strip assembly 130. The first cutting strip assembly 120 is located on one side of the pressing strip assembly, the first pressing strip assembly 130 is used to press the pole piece 600, and the first cutting strip assembly 120 is used to cut off the pole piece 600.

[0035] Specifically, the number of the first pressing belt assemblies 130 is two, the first cutting belt assembly 120 is located between the two first pressing belt assemblies 130, and the two first pressing belt assemblies 130 simultaneously press the pole piece 600 on both sides of the first cutting belt assembly 120, so that the part of the pole piece 600 to be cut can be kept in tension, thereby avoiding cutting displacement caused by uneven tension of the pole piece 600 due to one-sided pressing, and improving the cutting precision of the pole piece 600.

[0036] Further, the second cutting mechanism 200 includes a second rack 210, a second cutting belt assembly 220 and a second pressing belt assembly 230 arranged on the second rack 210, the second cutting belt assembly 220 is located on one side of the second pressing belt assembly 230, the second pressing belt assembly 230 is used to press the pole piece 600, and the second cutting belt assembly 220 is used to cut the pole piece 600.

[0037] Further, the winding mechanism 300 is used to wind the cut pole piece 600, and the winding mechanism 300 is arranged on the second rack 210. Specifically, the second cutting belt assembly 220 is located between the second pressing belt assembly 230 and the winding mechanism 300, and the winding mechanism 300 includes a winding shaft 310, a third pressing belt assembly 320 and a motor 330. The two ends of the winding shaft 310 are rotatably connected to the second rack 210, the third pressing belt assembly 320 is used to press the pole piece 600 on the winding shaft 310, and the motor 330 is used to drive the winding shaft 310 to rotate.

[0038] When in an emergency power failure state, the UPS (uninterruptible power supply system) is enabled to supply power to the first cutting mechanism 100, the second cutting mechanism 200 and the winding mechanism 300. The two first pressing belt assemblies 130 press the pole piece 600 on one side of the oven 500, the second pressing belt assembly 230 presses the pole piece 600 on the other side of the oven 500, and the third pressing belt assembly 320 presses the pole piece 600 on the winding shaft 310. Then, the first cutting belt assembly 120 cuts the pole piece 600 on one side of the oven 500, the second cutting belt assembly 220 cuts the pole piece 600 on the other side of the oven 500, then the first pressing belt assembly 130 close to one side of the oven 500 loosens the cut pole piece 600, and finally the motor 330 drives the winding shaft 310 to rotate, and the winding shaft 310 winds the cut pole piece 600, thereby realizing automatic cutting and winding after power failure, compact structure, convenient arrangement, lower requirement for USP (uninterruptible power supply system) load, fast winding, and no pollution to the wound pole piece 600.

[0039] In some preferred embodiments, a flattening mechanism 400 is further included between the winding mechanism 300 and the oven 500, the flattening mechanism 400 includes a passing roller 410, a pressing roller 420 located above the passing roller 410, and a first driving member 430 for driving the pressing roller 420 to move close to or away from the passing roller 410, the pressing roller 420 is parallel to the passing roller 410, and the pole piece 600 is located between the pressing roller 420 and the passing roller 410, two wallboards 211 are arranged on the second support in a vertical manner, and two ends of the passing roller 410 are respectively connected to the two wallboards 211 in a rotating manner.

[0040] It can be understood that the passing roller 410 can support the pole piece 600, the first driving member 430 drives the pressing roller 420 to move close to the passing roller 410 to press the pole piece 600 on the passing roller 410, and when the winding mechanism 300 winds the pole piece 600, on the one hand, the pole piece 600 can be flattened to prevent the pole piece 600 from being wrinkled, and on the other hand, the pole piece 600 can always maintain a certain tension so that the pole piece 600 will not be loose when being wound.

[0041] Further, the first driving member 430 includes two first air cylinders 431, the two first air cylinders 431 are respectively mounted on the inner sides of the two wallboards 211, the output ends of the two first air cylinders 431 are respectively provided with mounting seats 432, and two ends of the pressing roller 420 are respectively connected to the two mounting seats 432 in a rotating manner, the two first air cylinders 431 drive the two ends of the pressing roller 420 to move up and down at the same time, so that the pressing roller 420 can be balanced in force, the pole piece 600 can always be pressed by the pressing roller 420 in the width direction, and the stability during winding can be improved.

[0042] In some preferred embodiments, the third pressing belt assembly 320 includes a first pressing belt rod 321 and a second driving member 322, the first pressing belt rod 321 is parallel to the winding shaft 310, the pole piece 600 is located between the first pressing belt rod 321 and the winding shaft 310, and the second driving member 322 is used to drive the first pressing belt rod 321 to move close to or away from the winding shaft 310.

[0043] Specifically, the second driving member 322 includes two second air cylinders, the two second air cylinders are mounted on the winding shaft 310, and the telescopic rods of the two second air cylinders respectively penetrate through the winding shaft 310 and are connected to two ends of the first pressing belt rod 321.

[0044] It can be understood that the two second air cylinders drive the two ends of the first pressing belt rod 321 to move close to the winding shaft 310 at the same time, so that the first pressing belt rod 321 can be balanced in force, the position of the pole piece 600 in the width direction can be pressed on the winding shaft 310 by the first pressing belt rod 321, and when the winding shaft 310 rotates, the two second air cylinders and the first pressing belt rod 321 can rotate together with the winding shaft 310, so that the stability during winding can be ensured.

[0045] In some preferred embodiments, the winding mechanism 300 further comprises a first material receiving box 340, which is mounted on the second rack 210 and located directly below the winding shaft 310. When the winding of the pole piece 600 is completed, the pole piece 600 inside the oven 500 is completely extracted, the two second cylinders simultaneously drive the first pressing belt rod 321 away from the winding shaft 310, the operator uses a knife to cut the waste material on the winding shaft 310, and the waste material falls into the first material receiving box 340 below, thereby facilitating the collection of waste materials.

[0046] In some preferred embodiments, the first pressing belt assembly 130 comprises a first supporting rod 131, a second pressing belt rod 132 located directly above the first supporting rod 131, and a third driving member 133 for driving the second pressing belt rod 132 to approach or move away from the first supporting rod 131. The length direction of the first supporting rod 131 and the second pressing belt rod 132 both extend along the width direction of the pole piece 600. Specifically, the third driving member 133 comprises two third cylinders, which are respectively mounted on the two sides of the first rack 110, and the telescopic ends of the two third cylinders are respectively connected to the two ends of the second pressing belt rod 132.

[0047] It can be understood that the two third cylinders simultaneously drive the two ends of the second pressing belt rod 132 to descend, which ensures that the second pressing belt rod 132 is balanced in force, so that the second pressing belt rod 132 presses the position of the pole piece 600 in the width direction on the first supporting rod 131, thereby ensuring that the pole piece 600 between the two first pressing belt assemblies 130 is always tensioned, facilitating the first cutter 121 assembly to cut off the pole piece 600.

[0048] In some preferred embodiments, the first cutting belt assembly 120 comprises a first cutter 121 and a fourth driving member 122 for driving the first cutter 121 to ascend and descend. The first cutter 121 is located directly above the pole piece 600, and the length direction of the first cutter 121 extends along the width direction of the pole piece 600.

[0049] Further, the output end of the fourth driving member 122 is connected with a first cutter seat 123, and the first cutter 121 is mounted on the first cutter seat 123, thereby facilitating the disassembly and assembly of the first cutter 121.

[0050] Specifically, the fourth driving member 122 comprises two fourth cylinders, which are respectively mounted on the two sides of the first rack 110, and the telescopic ends of the two fourth cylinders are respectively connected to the two ends of the first cutter seat 123. The two fourth cylinders simultaneously drive the first cutter seat 123 and the first cutter 121 to descend, so that the cutting edge of the first cutter 121 simultaneously contacts the position of the pole piece 600 in the width direction, and the pole piece 600 is instantaneously cut off.

[0051] In some preferred embodiments, a second material receiving box 140 is arranged directly below the first cutting assembly 120, and the second material receiving box 140 is arranged on the first rack 110, and the second material receiving box 140 is used for receiving waste such as scraps and dust, and preventing secondary pollution.

[0052] In some preferred embodiments, the second belt pressing assembly 230 comprises a second supporting rod 231, a third belt pressing rod 232 arranged directly above the second supporting rod 231, and a fifth driving member 233 used for driving the third belt pressing rod 232 to move close to or away from the second supporting rod 231, and the length direction of the second supporting rod 231 and the third belt pressing rod 232 both extend along the width direction of the pole piece 600.

[0053] Specifically, the fifth driving member 233 comprises two fifth cylinders, and the two fifth cylinders are arranged on the inner sides of the two wall plates 211 respectively, and the two fifth cylinders drive the two ends of the third belt pressing rod 232 to descend simultaneously, so as to ensure that the third belt pressing rod 232 presses the position of the pole piece 600 in the width direction on the second supporting rod 231, thereby making the pole piece 600 between the second belt pressing assembly 230 and the winding mechanism 300 always maintain tension, and facilitating the second cutter 221 assembly to cut the pole piece 600.

[0054] In some preferred embodiments, the second belt cutting assembly 220 comprises a second cutter 221 and a sixth driving member 222 used for driving the second cutter 221 to ascend and descend, and the second cutter 221 is arranged directly above the pole piece 600, and the length direction of the second cutter 221 extends along the width direction of the pole piece 600.

[0055] Further, the output end of the sixth driving member 222 is connected with a second cutter seat 223, and the second cutter 221 is installed on the second cutter seat 223, thereby facilitating disassembly and assembly of the second cutter 221.

[0056] Specifically, the sixth driving member 222 comprises two sixth cylinders, and the two sixth cylinders are installed on the inner sides of the two wall plates 211 respectively, and the telescopic ends of the two sixth cylinders are connected with the two ends of the second cutter seat 223 respectively, and the two sixth cylinders drive the second cutter seat 223 and the second cutter 221 to descend simultaneously, so as to make the cutting edge of the second cutter 221 contact the position of the pole piece 600 in the width direction simultaneously, and make the pole piece 600 be cut instantaneously.

[0057] The above is a specific description of the preferred embodiment of the utility model, but the utility model is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. An emergency quick automatic winding device, characterized in that, The application relates to a cutting mechanism for cutting a section of an electrode plate, comprising: a first cutting mechanism arranged on one side of the oven, comprising a first frame, a first cutting assembly arranged on the first frame and at least one first pressing assembly arranged on the first frame, the first cutting assembly being arranged on one side of the first pressing assembly, the first pressing assembly being used for pressing the electrode plate, and the first cutting assembly being used for cutting the electrode plate; a second cutting mechanism arranged on the other side of the oven, comprising a second frame, a second cutting assembly arranged on the second frame and a second pressing assembly arranged on the second frame, the second cutting assembly being arranged on one side of the second pressing assembly, the second pressing assembly being used for pressing the electrode plate, and the second cutting assembly being used for cutting the electrode plate; a winding mechanism arranged on the second frame and used for winding the section of the electrode plate after cutting, the second cutting assembly being arranged between the second pressing assembly and the winding mechanism, the winding mechanism comprising a winding shaft, a third pressing assembly and a motor, two ends of the winding shaft being rotatably connected to the second frame, the third pressing assembly being used for pressing the electrode plate on the winding shaft, and the motor being used for driving the winding shaft to rotate.

2. The emergency quick automatic winding device according to claim 1, characterized in that, The number of the first pressing assemblies is two, and the first cutting assembly is arranged between the two first pressing assemblies.

3. The emergency quick automatic winding device according to claim 1, characterized in that, The application further comprises a flattening mechanism arranged between the winding mechanism and the oven, the flattening mechanism comprising a passing roller, a pressing roller arranged above the passing roller and a first driving element used for driving the pressing roller to move close to or away from the passing roller, the pressing roller being parallel to the passing roller, the electrode plate being arranged between the pressing roller and the passing roller, the second frame being provided with two wall plates arranged vertically, and two ends of the passing roller being rotatably connected to the two wall plates respectively.

4. The emergency quick automatic winding device according to claim 3, characterized in that, The first driving element comprises two first air cylinders, the two first air cylinders being mounted on the inner sides of the two wall plates respectively, the output ends of the two first air cylinders being provided with mounting seats, and two ends of the pressing roller being rotatably connected to the two mounting seats respectively.

5. The emergency quick automatic winding device according to claim 1, characterized in that, The third pressing assembly comprises a first pressing rod and a second driving element, the first pressing rod being parallel to the winding shaft, the electrode plate being arranged between the first pressing rod and the winding shaft, and the second driving element being used for driving the first pressing rod to move close to or away from the winding shaft.

6. The emergency quick automatic winding device according to claim 5, characterized in that, The second driving element comprises two second air cylinders, the two second air cylinders being mounted on the winding shaft, and the telescopic rods of the two second air cylinders penetrating through the winding shaft and being connected to two ends of the first pressing rod respectively.

7. The emergency quick automatic winding device according to claim 1, characterized in that, The winding mechanism further comprises a first material receiving box, the first material receiving box being mounted on the second frame and being arranged directly below the winding shaft. The first cutting mechanism further comprises a second material receiving box, the second material receiving box being mounted on the first frame and being arranged directly below the first cutting assembly.

8. The emergency quick automatic winding device according to claim 1, characterized in that, The first pressing assembly comprises a first supporting rod, a second pressing rod arranged directly above the first supporting rod and a third driving element used for driving the second pressing rod to move close to or away from the first supporting rod, the length directions of the first supporting rod and the second pressing rod extending along the width direction of the electrode plate.

9. The emergency quick automatic winding device according to claim 1, characterized in that, The second pressing belt assembly comprises a second supporting rod, a third pressing belt rod located directly above the second supporting rod, and a fifth driving member for driving the third pressing belt rod to move close to or away from the second supporting rod, and the length direction of the second supporting rod and the third pressing belt rod both extend along the width direction of the pole piece.

10. The emergency quick automatic winding device according to claim 1, characterized in that, The first cutting belt assembly comprises a first cutting knife and a fourth driving member for driving the first cutting knife to move up and down, the first cutting knife is located directly above the pole piece, and the length direction of the first cutting knife extends along the width direction of the pole piece. And / or, the second cutting belt assembly comprises a second cutting knife and a sixth driving member for driving the second cutting knife to move up and down, the second cutting knife is located directly above the pole piece, and the length direction of the second cutting knife extends along the width direction of the pole piece.

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