Pole piece slitting equipment

Abstract

The utility model provides pole piece slitting equipment which comprises a feeding device arranged in the advancing direction of pole piece slitting and comprising a driving roller and a pressing roller. The feeding adjusting mechanism comprises a first feeding adjusting device and a second feeding adjusting device, and a first height difference exists between the first feeding adjusting device and the second feeding adjusting device; the differential slitting mechanism comprises a first slitting knife and a second slitting knife which are used for slitting the pole piece, and the distance between the first slitting knife and the second slitting knife is adjustable; the differential driving mechanism comprises a first differential driving device and a second differential driving device, the first differential driving device is connected with the feeding device and the first slitting knife, the second differential driving device is connected with the second slitting knife, and the first differential driving device and the second differential driving device have a preset speed ratio; the discharging adjusting mechanism comprises a first discharging adjusting device and a second discharging adjusting device, and a second height difference exists between the first discharging adjusting device and the second discharging adjusting device. The pole piece slitting device is simple in structure, and the pole piece slitting quality and efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery processing technical field, concretely relates to a pole piece slitting equipment. BACKGROUND

[0002] The pole piece segment equipment accounts for a large proportion in the lithium battery production, and plays a vital role on the performance of the battery cell. The laser die cutting slitting all-in-one machine is a more important process in the pole piece segment, mainly cuts the pole lug out of the pole piece after roller pressing by laser, and divides the pole piece into two by the slitting mechanism. The existing pole piece slitting mechanism basically adopts fixed slitting knives, and does not have the feeding and discharging adjusting devices before and after slitting. In the slitting process, burrs, pole piece powder dropping, wire drawing, metal leakage, wavy edge of the coated pole piece edge and other problems are caused, which brings safety hazards to the battery cell. UTILITARY MODEL

[0003] In order to overcome the defects in the prior art, the utility model embodiment provides a pole piece slitting equipment, which is simple in structure, can avoid powder dropping, metal leakage and pole piece wavy edge in the pole piece slitting process, and improves the quality and production efficiency of the pole piece slitting.

[0004] In order to achieve the above purpose, the utility model adopts the technical scheme of:

[0005] The utility model discloses a pole piece slitting equipment, which comprises:

[0006] A feeding device, the feeding device comprises a driving roller and a pressing roller;

[0007] A feeding adjusting mechanism, the feeding adjusting mechanism comprises a first feeding adjusting device and a second feeding adjusting device, and the first feeding adjusting device and the second feeding adjusting device have a first height difference;

[0008] A differential speed slitting mechanism, the differential speed slitting mechanism comprises a first slitting knife and a second slitting knife for slitting the pole piece, and the distance between the first slitting knife and the second slitting knife is adjustable;

[0009] A differential speed driving mechanism, the differential speed driving mechanism comprises a first differential speed driving device connected with the feeding device and the first slitting knife, a second differential speed driving device connected with the second slitting knife, and the first differential speed driving device and the second differential speed driving device have a preset speed ratio;

[0010] A discharging adjusting mechanism, the discharging adjusting mechanism comprises a first discharging adjusting device and a second discharging adjusting device, and the first discharging adjusting device and the second discharging adjusting device have a second height difference.

[0011] The first and second feeding adjusting devices with different heights are arranged, so that the height of the feeding pole piece is in the same horizontal line with the first cutting knife, the friction between the cut pole piece and the side surface of the cutting knife is avoided to generate powder falling or wire drawing, the first and second cutting knives are driven by the first and second differential driving devices, the first and second cutting knives are driven at different speeds by the first and second differential driving devices, differential cutting is realized, powder falling or wire drawing during cutting of the pole piece is further avoided, the replacement frequency of the cutting knife is reduced, the production efficiency is improved, the differential cutting mechanism with adjustable distance is adopted, different pole pieces of materials can be adapted, the practicability is high, the applicability is wide, the first and second discharging adjusting devices with different heights are arranged, the pole pieces can be separated, the friction between the cut pole pieces is avoided to cause pole piece defects, and the wave edges of the pole pieces are flattened by the upper and lower cross layout of the discharging mode, the quality and efficiency of the pole piece cutting are improved.

[0012] Further, the first feeding adjusting device, the second feeding adjusting device, the first discharging adjusting device and the second discharging adjusting device are the same in structure, and include a transition roller and supports separately arranged at two ends of the transition roller, and the transition roller is movable up and down along the supports to adjust the height of the transition roller.

[0013] During cutting of the pole piece, wrinkles are generated at both ends of the feeding pole piece, the height of the feeding pole piece is not in the same horizontal line with the first cutting knife, and powder falling or wire drawing is generated after cutting of the pole piece, the height of the feeding pole piece and the level of both ends of the pole piece to be cut can be adjusted by the height-adjustable transition roller, and the quality and efficiency of the pole piece cutting are improved.

[0014] Further, the transition roller includes a transition roller body, a tab preventing piece connected to the transition roller body, a first fixed block arranged at two ends of the transition roller and connected to the transition roller body, and a stop rod connected to the first fixed block and arranged at the front end of the tab preventing piece, a pole piece flattening piece is arranged at the corresponding position of the tab preventing piece on the stop rod, an adjusting screw is arranged in the support, a second fixed block is arranged on the adjusting screw, the first fixed block is connected to the second fixed block, and the adjusting screw is movable up and down to drive the transition roller to move up and down.

[0015] The second fixed block is movable up and down by rotating the adjusting screw, the transition roller is movable up and down to adjust the level of both ends of the pole piece to be cut and the height of the pole piece, the pole piece flattening piece can reduce the folding of the pole piece when the pole piece passes through the transition roller, during feeding, the pole piece to be cut moves along the transition roller body and the tab preventing piece, passes through between the transition roller body and the stop rod, and enters the differential cutting mechanism through the first and second feeding adjusting devices for pole piece cutting.

[0016] Further, the differential cutting mechanism further comprises:

[0017] a cutting frame;

[0018] a first driving roller assembly and a second driving roller assembly arranged on both sides of the advancing direction of the pole piece;

[0019] an adjusting member arranged at both ends of the frame, the adjusting member comprising an adjusting nut arranged between the first driving roller assembly and the second driving roller assembly, and a nut arranged above the second driving roller assembly, the adjusting nut being provided with a spring, and the nut being in contact with the second driving roller assembly, so that the spring generates a biasing force to adjust the distance between the first cutting knife and the second cutting knife.

[0020] The nut is in contact with the second driving roller assembly, so that the spring is pressed downward, thereby reducing the distance between the first driving roller assembly and the second driving roller assembly. When the distance needs to be adjusted, the nut is rotated, so that the spring gradually recovers the deformation. The second driving roller assembly moves upward under the biasing force of the spring, thereby increasing the distance between the first driving roller assembly and the second driving roller assembly, so as to change the cutting amount of the first cutting knife and the second cutting knife, thereby being applicable to pole pieces made of different materials.

[0021] Further, the first driving roller assembly comprises a first driving wheel and a first knife shaft sleeved on the first driving wheel, the second driving roller assembly comprises a second driving wheel and a second knife shaft sleeved on the second driving wheel, the first cutting knife is sleeved on the first knife shaft, the second cutting knife is sleeved on the second knife shaft, and the first cutting knife is in position correspondence with the second cutting knife.

[0022] Still further, the cutting frame is provided with a first driving shaft and a second driving shaft at both ends thereof, the first driving shaft is sleeved on the first driving wheel, the second driving shaft is sleeved on the second driving wheel, the adjusting nut is arranged between the first driving shaft and the second driving shaft, and the nut is in contact with the second driving shaft, thereby adjusting the distance between the first driving shaft and the second driving shaft.

[0023] Further, the frame is provided with a dust removal device at the bottom thereof and a protection plate at the top thereof. The dust removal device is used for dust removal during cutting of the pole piece, and the protection plate is used for safety protection to avoid accidents.

[0024] Further, the first differential drive device comprises a first motor connected with the feeding device and the first slitting cutter, a first conveying belt connected with the first motor and the first driving wheel, and a first tensioning assembly connected with the first conveying belt; the second differential drive device comprises a second motor connected with the second slitting cutter, a second conveying belt connected with the second motor and the second driving wheel, and a second tensioning assembly connected with the second conveying belt.

[0025] Further, the speed ratio of the first differential drive device and the second differential drive device is 1:1.01-1:1.15.

[0026] Further, the slitting slide is arranged below the differential slitting mechanism.

[0027] Further, the baffle is arranged on one side of the pole piece slitting device, and the differential drive mechanism is arranged on the side of the baffle away from the pole piece slitting device.

[0028] Compared with the prior art, the utility model has the following advantages:

[0029] 1. The application is before the cutting of the pole piece, by setting the first material feeding adjusting device and the second material feeding adjusting device with different heights, the height of the feeding pole piece is in the same horizontal line with the first cutting knife, avoiding the friction between the cut pole piece and the cutting knife side to produce the powder falling or wire drawing, the first differential drive device drives the feeding device and the first cutting knife, the second differential drive device drives the second cutting knife, because the first differential drive device and the second differential drive device drive the first cutting knife and the second cutting knife at different speeds, so as to realize differential cutting, further avoid the powder falling or wire drawing when cutting the pole piece, so as to reduce the replacement frequency of the cutting knife, improve the production efficiency, at the same time, the differential cutting mechanism with adjustable distance can adapt to the pole piece of different materials, the practicability is strong, the applicability is wide, by setting the first material feeding adjusting device and the second material feeding adjusting device with different heights, the pole piece can be separated, and the friction between the cut pole pieces can be avoided to cause the pole piece defect, at the same time, the cross layout of the material feeding mode can make the wave edge of the pole piece flat, improve the quality and efficiency of the pole piece cutting.

[0030] 2. The pole piece cutting equipment in the application has simple structure and strong universality, can be used for professional pole piece cutting machine, and can also be modified on the existing equipment.

[0031] In order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 is a structure diagram of a pole piece cutting equipment provided by the embodiment of the utility model;

[0034] Figure 2 is a structure diagram of a first angle pole piece cutting equipment provided by the embodiment of the utility model;

[0035] Figure 3 is a structure diagram of a second angle pole piece cutting equipment provided by the embodiment of the utility model;

[0036] Figure 4 is a structure diagram of a material feeding / outlet adjusting device provided by the embodiment of the utility model;

[0037] Figure 5It is a structure diagram of the differential cutting mechanism.

[0038] The above figure reference signs: 1, feeding device;101, driving roller;102, compression roller;2, first feeding adjusting device;3, second feeding adjusting device;4, first driving roller assembly;401, first driving wheel;402, first cutter shaft;5, second driving roller assembly;501, second driving wheel;502, second cutter shaft;6, first differential driving device;601, first motor;602, first conveying belt;603, first tensioning assembly;7, second differential driving device;701, second motor;702, second conveying belt;703, second tensioning assembly;8, first discharging adjusting device;9, second discharging adjusting device;10, first cutting knife;11, second cutting knife;12, transition roller;1201, transition roller body;1202, tab preventing piece;1203, first fixing block;1204, blocking rod;1205, tab smoothing piece;13, support;1301, adjusting screw;1302, second fixing block;14, cutting frame;15, adjusting nut;16, nut;17, dust removal device;18, protection plate;19, cutting sliding base;20, baffle;21, differential cutting mechanism;22, differential driving mechanism;23, cutting front tab;24, cutting rear tab. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below 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, not all the embodiments. In addition, the drawings of the present application are only simple schematic illustrations, not the depiction of actual size, and the prior declaration is made.

[0040] In the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "forward", "backward", "between", "close to", "far away from" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection;It can be directly connected, or indirectly connected. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0042] Reference Figures 1-5 As shown, this application embodiment provides an electrode slitting device, including: a device arranged along the forward direction of electrode slitting.

[0043] Feeding device 1, which includes a drive roller 101 and a pressure roller 102, such as Figures 1-3 As shown, the pre-slit electrode sheet 23 is wound on the drive roller 101. The drive roller 101 pulls the pre-slit electrode sheet 23 to move, thereby realizing feeding. The clamping roller 102 presses on the drive roller 101 to prevent the electrode sheet from slipping during feeding.

[0044] The feeding adjustment mechanism includes a first feeding adjustment device 2 and a second feeding adjustment device 3. The first feeding adjustment device 2 and the second feeding adjustment device 3 have a first height difference, so that when the electrode sheet 23 before slitting passes through the first feeding adjustment device 2 and the second feeding adjustment device 3, the electrode sheet 23 before slitting is kept at the same height as the first slitting blade 10 before slitting, so as to avoid excessive friction between the electrode sheet after slitting and the side of the slitting blade, thereby causing powder to fall off.

[0045] like Figure 4 As shown, the first feed adjustment device 2 includes a transition roller 12 and supports 13 separately disposed at both ends of the transition roller 12. The transition roller 12 can move up and down along the supports 13 to adjust the height of the transition roller 12.

[0046] Specifically, the transition roller 12 includes a transition roller body 1201, an electrode tab prevention piece 1202 connected to the transition roller body 1201, a first fixing block 1203 disposed at both ends of the transition roller 12 and connected to the transition roller body 1201, and a stop bar 1204 connected to the first fixing block 1203 and disposed at the front end of the electrode tab prevention piece 1202. An electrode flattening piece 1205 is provided on the stop bar 1204 at a position opposite to the electrode tab prevention piece 1202. An adjusting screw 1301 is provided in the support 13. A second fixing block 1302 is sleeved on the adjusting screw 1301. The first fixing block 1203 is connected to the second fixing block 1302. When it is necessary to adjust the height of the transition roller 12, the adjusting screw 1301 is rotated to drive the second fixing block 1302 to move up and down, thereby driving the transition roller 12 to move up and down to adjust the level of both ends of the transition roller body 1201 and the feeding height of the electrode 23 before slitting.

[0047] In a possible embodiment, the tab preventing piece 1202 and the tab flattening piece 1205 are arranged close to the middle part of the transition roller 12 and are spaced apart, and both the tab preventing piece 1202 and the tab flattening piece 1205 are provided in two.

[0048] In the embodiment of the present application, the second feeding adjusting device 3 is consistent with the first feeding adjusting device 2 in structure. When the slit tab 23 passes through the first feeding adjusting device 2, the slit tab 23 first passes above the transition roller body 1201 of the first feeding adjusting device 2, then passes between the tab preventing piece 1202 and the blocking rod 1204 of the first feeding adjusting device 2, and enters the second feeding adjusting device 3. The slit tab 23 first passes between the tab preventing piece 1202 and the blocking rod 1204 of the second feeding adjusting device 3, then passes above the transition roller body 1201 of the second feeding adjusting device 3, and enters the differential cutting mechanism 21 at the same height as the first cutting knife 10 to start cutting the tab.

[0049] The differential cutting mechanism 21, as shown in Figure 5 includes the first cutting knife 10 and the second cutting knife 11 for cutting the tab, and the distance between the first cutting knife 10 and the second cutting knife 11 is adjustable.

[0050] Specifically, the differential cutting mechanism 21 further includes a cutting frame 14, a first driving roller assembly 4 and a second driving roller assembly 5 arranged on both sides of the advancing direction of the tab, and an adjusting piece arranged at both ends of the cutting frame 14. In the embodiment of the present application, the first driving roller assembly 4 is located below the second driving roller assembly 5.

[0051] The first driving roller assembly 4 includes a first driving wheel 401 and a first knife shaft 402 sleeved on the first driving wheel 401, and the first driving wheel 401 is arranged through the cutting frame 14, and the first knife shaft 402 is located inside the cutting frame 14. The second driving roller assembly 5 includes a second driving wheel 501 and a second knife shaft 502 sleeved on the second driving wheel 501, and the second driving wheel 501 is arranged through the cutting frame 14, and the second knife shaft 502 is located inside the cutting frame 14. The first cutting knife 10 is sleeved on the first knife shaft 402, the second cutting knife 11 is sleeved on the second knife shaft 502, and the first cutting knife 10 and the second cutting knife 11 are in position correspondence. Preferably, the first cutting knife 10 and the second cutting knife 11 are centrally arranged on the first knife shaft 402 and the second knife shaft 502.

[0052] The adjusting member comprises an adjusting nut 15 arranged between the first driving roller assembly 4 and the second driving roller assembly 5 and a nut 16 arranged above the second driving roller assembly 5, the adjusting nut 15 is provided with a spring, the nut 16 is in contact with the second driving roller assembly 5, the spring is pressed downward to generate a biasing force, thereby reducing the distance between the first driving roller assembly and the second driving roller assembly, when it is needed to increase the distance, the nut 16 is rotated, the spring gradually restores the deformation, the second driving roller assembly 5 moves upward under the biasing force of the spring, thereby increasing the distance between the first driving roller assembly 4 and the second driving roller assembly 5.

[0053] In a possible embodiment, the slitting frame 14 is provided with a first driving shaft and a second driving shaft at two ends, the first driving shaft is sleeved on the first driving wheel 401, the second driving shaft is sleeved on the second driving wheel 501, the adjusting nut 15 is arranged between the first driving shaft and the second driving shaft, and the nut 16 is in contact with the second driving shaft, so as to adjust the distance between the first driving shaft and the second driving shaft, thereby adjusting the distance between the first driving roller assembly 4 and the second driving roller assembly 5.

[0054] As shown in Figure 5 , the bottom of the slitting frame 14 is provided with a dust removal device 17, and the top of the slitting frame 14 is provided with a protective plate 18. In a possible embodiment, the dust removal device 17 comprises a dust removal machine, the bottom of the dust removal machine is connected with a pipeline, and the dust after slitting is adsorbed by the negative pressure adsorption sheet of the dust removal machine, thereby cleaning the differential slitting mechanism 21. The protective plate 18 prevents human contact with the high-speed rotating second slitting knife 11 during operation, thereby preventing work accidents.

[0055] In a possible embodiment, in order to improve the safety of the differential slitting mechanism 21, as shown in Figure 2 , a protective cover is arranged above the second slitting knife 11, and a supporting rod is arranged in the inside of the bottom of the slitting frame 14, the supporting rod is arranged at the front end of the second knife shaft 502 and connected with the protective cover, and is used for supporting the protective cover, thereby further avoiding work accidents.

[0056] The differential driving mechanism 22, as shown in Figure 3 , comprises a first differential driving device 6 connected with the feeding device 1 and the first slitting knife 10 and a second differential driving device 7 connected with the second slitting knife 11, the first differential driving device 6 and the second differential driving device 7 have a preset speed ratio, so that the first differential driving device 6 and the second differential driving device 7 drive the first slitting knife 10 and the second slitting knife 11 to slit the sheet at different speeds, thereby avoiding the generation of wire drawing or burrs on the slit sheet 24.

[0057] Specifically, the first differential drive device 6 includes a first motor 601 connected with the feeding device 1 and the first slitting cutter 10, a first conveying belt 602 connected with the first motor 601 and the first driving wheel 401, and a first tensioning assembly 603 connected with the first conveying belt 602. The second differential drive device 7 includes a second motor 701 connected with the second slitting cutter 11, a second conveying belt 702 connected with the second motor 701 and the second driving wheel 501, and a second tensioning assembly 703 connected with the second conveying belt 702. The first driving wheel 401 and the second driving wheel 501 in the differential slitting mechanism 22 are respectively connected with the first motor 601 and the second motor 701, so that the first driving roller assembly 4 is driven by the first motor 601 and the second driving roller assembly 5 is driven by the second motor 701, and the first slitting cutter 10 and the second slitting cutter 11 are driven to slit the pole piece at a preset speed ratio, thereby realizing differential slitting.

[0058] Preferably, the speed ratio of the first differential drive device 6 and the second differential drive device 7 is 1:1.01-1:1.15, so that the speed of the second slitting cutter 11 is faster than that of the first slitting cutter 10, and the wire-drawing burr of the pole piece is avoided.

[0059] The discharge adjusting mechanism includes a first discharge adjusting device 8 and a second discharge adjusting device 9, and the first discharge adjusting device 8 and the second discharge adjusting device 9 have a second height difference, so as to separate the slit pole piece 24 and avoid the contact friction between the two slit pole pieces, thereby improving the quality of the slit pole piece.

[0060] In the embodiment of the present application, the structures of the first discharge adjusting device 8 and the second discharge adjusting device 9 are the same as those of the first feeding adjusting device 2 and the second feeding adjusting device 3, which will not be described herein. It should be noted that the first height difference and the second height difference in the above embodiment can be the same or different, and the actual difference between the first height difference and the second height difference can be adjusted according to the height of the slitting cutter of the differential slitting mechanism and the discharge of the slit pole piece, which will not be limited herein.

[0061] In a possible embodiment, in order to facilitate the installation and disassembly of the differential slitting mechanism 21, the pole piece slitting device further comprises a slitting slide 19 arranged below the differential slitting mechanism 21, and the slitting slide 19 is pullably mounted on the pole piece slitting device. When the differential slitting mechanism 21 needs to be disassembled, the differential slitting mechanism 21 is first separated from the first differential drive device 6 and the second differential drive device 7 in the differential drive mechanism 22, and then the slitting slide 19 is pulled out, which is simple in structure and convenient to operate.

[0062] In a possible embodiment, the pole piece slitting device further comprises a baffle plate 20 connected to one side of the pole piece slitting device, and a differential drive mechanism 22 is arranged on the side of the baffle plate 20 away from the pole piece slitting device.

[0063] The pole piece slitting device provided by the embodiment of the application can avoid the friction between the pole piece after slitting and the side surface of the slitting cutter to generate powder dropping or wire drawing, thereby reducing the replacement frequency of the slitting cutter, improving the production efficiency, improving the quality and efficiency of pole piece slitting, and having simple structure, being applicable to pole pieces of different materials, having strong universality, being applicable to professional pole piece slitting machines, and being applicable to the modification of existing devices.

[0064] The principle and implementation mode of the utility model are described by the specific embodiments in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general skilled in the art, the specific implementation mode and application range will be changed according to the idea of the utility model, and the above is not understood as the limitation of the utility model.

Claims

1. A pole piece slitting apparatus characterized by, The application relates to a polar plate slitting device. The polar plate slitting device comprises: an upper feeding device comprising a driving roller and a pressing roller; an inlet adjusting mechanism comprising a first inlet adjusting device and a second inlet adjusting device, the first inlet adjusting device and the second inlet adjusting device having a first height difference; a differential speed slitting mechanism comprising a first slitting cutter and a second slitting cutter for slitting the polar plate, the distance between the first slitting cutter and the second slitting cutter being adjustable; a differential speed driving mechanism comprising a first differential speed driving device connected with the upper feeding device and the first slitting cutter, a second differential speed driving device connected with the second slitting cutter, the first differential speed driving device and the second differential speed driving device having a preset speed ratio; an outlet adjusting mechanism comprising a first outlet adjusting device and a second outlet adjusting device, the first outlet adjusting device and the second outlet adjusting device having a second height difference.

2. The pole piece slitting apparatus of claim 1, wherein, The first inlet adjusting device, the second inlet adjusting device, the first outlet adjusting device and the second outlet adjusting device have the same structure, comprising a transition roller and a support arranged at two ends of the transition roller, the transition roller being movable up and down along the support to adjust the height of the transition roller.

3. The pole piece slitting apparatus of claim 2, wherein, The transition roller comprises a transition roller body, a tab preventing sheet connected with the transition roller body, a first fixed block arranged at two ends of the transition roller and connected with the transition roller body, and a stop rod connected with the first fixed block and arranged at the front end of the tab preventing sheet, the stop rod being provided with a polar plate smoothing piece at a position corresponding to the tab preventing sheet, the support being provided with an adjusting screw, the adjusting screw being provided with a second fixed block, the first fixed block being connected with the second fixed block, and the adjusting screw being movable up and down to drive the transition roller to move up and down.

4. The pole piece slitting apparatus of claim 1, wherein, The differential speed slitting mechanism further comprises: a slitting frame; a first driving roller assembly and a second driving roller assembly arranged at two sides of the advancing direction of the polar plate; an adjusting piece arranged at two ends of the frame, the adjusting piece comprising an adjusting nut arranged between the first driving roller assembly and the second driving roller assembly and a nut arranged above the second driving roller assembly, the adjusting nut being provided with a spring, and the nut being in abutment with the second driving roller assembly to generate a biasing force of the spring to adjust the distance between the first slitting cutter and the second slitting cutter.

5. The pole piece slitting apparatus of claim 4, wherein, The first driving roller assembly comprises a first driving wheel and a first cutter shaft sleeved on the first driving wheel, the second driving roller assembly comprises a second driving wheel and a second cutter shaft sleeved on the second driving wheel, the first slitting cutter is sleeved on the first cutter shaft, the second slitting cutter is sleeved on the second cutter shaft, and the first slitting cutter is in position correspondence with the second slitting cutter.

6. The pole piece slitting apparatus of claim 4, wherein, The frame is provided with a dust removal device at the bottom and a protection plate at the top.

7. The pole piece slitting apparatus of claim 1, wherein, The first differential drive device comprises a first motor connected with the feeding device and the first slitting cutter, a first conveying belt connected with the first motor and a first driving wheel, and a first tensioning assembly connected with the first conveying belt; the second differential drive device comprises a second motor connected with the second slitting cutter, a second conveying belt connected with the second motor and a second driving wheel, and a second tensioning assembly connected with the second conveying belt.

8. The pole piece slitting apparatus of claim 1, wherein, The speed ratio of the first differential drive device and the second differential drive device is 1:1.01-1:1.

15.

9. The pole piece slitting apparatus of claim 1, wherein, The slitting slide is further arranged below the differential slitting mechanism.

10. The pole piece slitting apparatus of claim 1, wherein, The baffle is further arranged on one side of the pole piece slitting equipment, and the differential drive mechanism is arranged on the side of the baffle away from the pole piece slitting equipment.

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