Pole piece pre-calendering device

Abstract

The utility model discloses a pole piece pre-calendering device, and particularly relates to the technical field of calendering devices, which comprises a mounting plate, vertical plates I are symmetrically and fixedly connected to the front and rear sides of the right part of the upper end of the mounting plate, and vertical plates II are symmetrically and fixedly connected to the front and rear sides of the middle part of the upper end of the mounting plate; an isolation roller assembly is jointly arranged in the middles of the opposite ends of the two first vertical plates, an adjusting roller assembly is arranged on the lower side of the isolation roller assembly, a lifting roller assembly is arranged on the upper portions of the left sides of the opposite ends of the two first vertical plates, a driving roller assembly is arranged on the lower side of an upper supporting roller, and a working wheel assembly is arranged on the lower side of the driving roller assembly. According to the pole piece pre-calendering device disclosed by the utility model, the supporting roller, the driving roller, the working wheel and the working wheel supporting roller are arranged, so that a device for pre-pressing a pole piece is changed into a four-roller structure, and an effect of increasing the extension rate of the pole piece is achieved in the pre-pressing process of the pole piece, so that the quality of the pole piece produced by pre-pressing is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to calendering device technical field, especially in a kind of pole piece pre-calendering device. BACKGROUND

[0002] The calendering device of pole piece production is the key equipment for manufacturing battery pole piece, especially in the production process of lithium ion battery. Pole piece is the core component of battery, usually by metal foil (such as copper foil or aluminum foil), its surface is coated with active material (such as positive material or negative material). The main role of calendering device is to compact the pole piece coated with active material, to improve its density and thickness consistency, so as to increase the capacity and performance of battery.

[0003] Chinese patent announcement No. CN218963612U relates to pre-calendering device technical field, especially a kind of pre-calendering device for pole piece production, including base, two roller pressing mechanisms are oppositely arranged on the base, and the placement area for placing pole piece is formed between the two roller pressing mechanisms;The roller pressing mechanism includes slide, the upper calendering assembly and the lower calendering assembly are arranged on the slide, the upper calendering assembly and the lower calendering assembly are oppositely arranged, the first driving mechanism for driving the upper calendering assembly and the lower calendering assembly to pre-press the lug is arranged on the slide, the upper calendering assembly and the lower calendering assembly increase the intermediate roller in contact with the working roller, and the intermediate roller is symmetrically arranged on the two sides of working roller, increases the rolling force compensation structure under the premise of guaranteeing use intensity, offsets a part of rack deformation to improve the rigidity and carrying capacity of rolling mill, makes the whole more stable, adjusts the position of rolling mill by control mechanism, can make the rolling mill suitable for pre-calendering of various width lugs.

[0004] In the above-mentioned two groups of components for calendering pole piece, the roll diameter of working roller and intermediate roller is relatively large, and the roll diameter is related to the pre-elongation rate of pole piece. Under normal circumstances, the smaller the roll diameter, the more concentrated the local pressure of pole piece during rolling, resulting in more obvious elongation phenomenon, and too large roll diameter will affect the elongation rate of pre-pressed pole piece, thereby affecting the quality of produced pole piece. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a kind of pole piece pre-calendering device, which can effectively solve the problem of too large roll diameter of pre-pressed pole piece in pole piece pre-calendering device, thereby causing bad influence on the elongation rate of pole piece pre-pressing.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0007] The application discloses a kind of pole piece pre-pressing device, including mounting plate, the right part of upper end of the mounting plate is symmetrically fixedly connected with vertical plate one, the middle part of upper end of the mounting plate is symmetrically fixedly connected with vertical plate two, two The opposite one end right side middle part of vertical plate one is commonly rotatably connected with over roller one, two The opposite one end middle part of vertical plate one is commonly provided with isolation roller assembly, the lower side of isolation roller assembly is provided with adjusting roller assembly, two The opposite one end left side upper part of vertical plate one is provided with lifting roller assembly, two The opposite one end left side middle part of vertical plate one is commonly rotatably connected with over roller four, two The opposite one end left side middle part of vertical plate two is commonly rotatably connected with over roller three, two The opposite one end upper side left and right part of vertical plate two is commonly rotatably connected with over roller two, two The opposite one end upper side middle part of vertical plate two is commonly rotatably connected with upper support roller, the lower side of upper support roller is provided with driving roller assembly, the lower side of driving roller assembly is provided with working wheel assembly, two The opposite one end lower side middle part of vertical plate two is commonly fixedly connected with slide rail.

[0008] Preferably, the isolation roller assembly includes motor one, the motor one is fixedly connected with the rear end middle part of the rear side vertical plate one, the output end of the motor one is fixedly connected with isolation roller one through a shaft coupling, and the front end of the isolation roller one penetrates through the rear end middle part of the rear side vertical plate one and extends to the front side of the rear side vertical plate one and the rear end middle part of the front side vertical plate one and is rotatably connected.

[0009] Preferably, the adjusting roller assembly includes two air cylinders one, two The output end piston rod upper end of air cylinder one is fixedly connected with connecting plate, and two The opposite one end of connecting plate is commonly rotatably connected with isolation roller two.

[0010] Preferably, the lifting roller assembly includes two round rods, two The upper end and lower end of round rod is fixedly connected with fixed block, and the fixed block on the same side is fixedly connected with the rear end left side upper part of the front side vertical plate one and the front end left side upper part of the rear side vertical plate one, two The outer surface of round rod is slidably connected with sliding block, and the rear end of the sliding block on the front side and the front end of the sliding block on the rear side are commonly fixedly connected with fixed plate, two The opposite one end middle part of fixed plate is commonly rotatably connected with buffer roller, and two The lower end of fixed plate is fixedly connected with air cylinder two, and two Air cylinder two is fixedly connected with the left side upper part of the opposite one end of two vertical plate one.

[0011] Preferably, the driving roller assembly includes motor three, the motor three is fixedly connected with the rear end middle part of the rear side vertical plate two, the output end of the motor three is fixedly connected with driving roller through a shaft coupling, and the front end of the isolation roller one penetrates through the rear end middle part of the rear side vertical plate two and extends to the front side of the rear side vertical plate two and the rear end middle part of the front side vertical plate two and is rotatably connected.

[0012] Preferably, the driving assembly comprises a driving assembly, three driven assemblies are arranged in a rectangular array on the left side of the driving assembly, but not limited to three, and 1-100 can be installed according to the installation condition of the driven wheel assembly.

[0013] Preferably, the driving assembly comprises a threaded rod and three mounting shells, but not limited to three, and 1-100 can be installed according to the installation condition of the driven wheel assembly. The inner surfaces of the three mounting shells are rotatably connected with worm gears, the left ends of the three mounting shells are fixedly connected with motors two, the output ends of the three motors two are fixedly connected with worm shafts through shaft couplings, the right ends of the three worm shafts penetrate the left ends of the mounting shells and extend into the mounting shells, the worm shafts and the worm gears on the same side are engaged, the three worm gears are linearly arranged and are threadedly connected with the outer surface of the threaded rod, and the threaded rod is fixedly connected with the front ends of the rear vertical plates two on the left side and the lower part.

[0014] Preferably, the driven assembly comprises a hydraulic cylinder, the hydraulic cylinder is slidably connected with the upper side of the slide rail and fixedly connected with the right end of the front mounting shell, and the upper end of the piston rod of the delivery end of the hydraulic cylinder is fixedly connected with a fixed shell, and the inner surface of the fixed shell is rotatably connected with a working wheel.

[0015] A plurality of working wheel supporting rollers are arranged below the working wheel.

[0016] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0017] 1、The utility model discloses a supporting roller, a driving roller, a working wheel and a working wheel supporting roller are arranged, change the device for prepressing the pole piece into four roller structures, thereby increasing the elongation of the pole piece during prepressing the pole piece, thereby improving the quality of the pole piece produced by prepressing, the working wheel assembly is arranged, and the working wheel can move transversely after being separated from the driving roller, thereby matching the prepressing operation of the pole lug position of different areas of the pole piece of different specifications during prepressing the pole piece.

[0018] 2、The utility model discloses two cylinders one, can drive the position of isolation roller no.

[0019] The working wheel supporting roller gives a stable support to the working wheel, thereby reducing the deformation of the working wheel during work, thereby prolonging the service life of the working wheel. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic view of the utility model;

[0021] Figure 2 It is the whole structure cross section schematic view of the utility model;

[0022] Figure 3 It is the whole structure appearance schematic view of the utility model;

[0023] Figure 4 It is the local structure schematic view of the utility model;

[0024] Figure 5 It is the local structure schematic view of the utility model; Figure 4 It is the structure schematic view of A place in the utility model;

[0025] Figure 6 It is the local plane structure schematic view of the utility model.

[0026] In the drawing: 1, mounting plate;2, vertical plate one;3, vertical plate two;4, over roller one;5, isolation roller assembly;51, motor one;52, isolation roller one;6, adjusting roller assembly;61, isolation roller two;62, connecting plate;63, air cylinder one;7, lifting roller assembly;71, air cylinder two;72, round rod;73, sliding block;74, fixed plate;75, buffer roller;76, fixed block;8, upper support roller;9, work wheel assembly;91, driving assembly;911, motor two;912, worm;913, worm gear;914, threaded rod;915, mounting shell;92, driven assembly;921, hydraulic cylinder;922, work wheel;923, fixed shell;924, work wheel support roller;10, driving roller assembly;101, motor three;102, driving roller;11, slide rail;12, over roller two;13, over roller three;14, over roller four. DETAILED DESCRIPTION

[0027] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0028] As Figure 1As shown, an electrode piece pre-pressing device includes a mounting plate 1, the upper end of the mounting plate 1 is fixedly connected with a vertical plate one 2 on the right side, the upper end of the mounting plate 1 is fixedly connected with a vertical plate two 3 on the middle, the two vertical plate one 2 is commonly rotatably connected with a passing roller one 4 on the right side of the opposite end, the two vertical plate one 2 is commonly provided with an isolation roller assembly 5 on the middle of the opposite end, the isolation roller assembly 5 is provided with an adjusting roller assembly 6 below, the two vertical plate one 2 is provided with a lifting roller assembly 7 on the left side of the opposite end, the two vertical plate one 2 is commonly rotatably connected with a passing roller four 14 on the left side of the opposite end, the two vertical plate two 3 is commonly rotatably connected with a passing roller three 13 on the middle of the opposite end, the two vertical plate two 3 is commonly rotatably connected with a passing roller two 12 on the left and right sides of the opposite end, the two vertical plate two 3 is commonly rotatably connected with an upper supporting roller 8 on the middle of the opposite end, the upper supporting roller 8 is provided with a driving roller assembly 10 below, the driving roller assembly 10 is provided with a working wheel assembly 9 below, the two vertical plate two 3 is commonly fixedly connected with a sliding rail 11 on the middle of the opposite end.

[0029] The left and right sides of the working wheel assembly 9 and the driving roller assembly 10 in the above are symmetrically provided with the same passing roller one 4, isolation roller assembly 5, adjusting roller assembly 6 and lifting roller assembly 7, the pre-pressing placement positions of the electrode piece on the passing roller one 4, isolation roller assembly 5, adjusting roller assembly 6 and lifting roller assembly 7 are consistent during the pre-pressing process of the electrode piece and the pre-pressing of the electrode piece, the scheme only shows the passing roller one 4, isolation roller assembly 5, adjusting roller assembly 6 and lifting roller assembly 7 on the right side in the working process of pre-pressing the electrode piece, and the left part is not described again;

[0030] The device in the above can be installed with 1-100 driven wheel assemblies according to specific conditions during specific use;

[0031] In specific implementation, the positions of the adjusting roller assembly 6, lifting roller assembly 7 and working wheel assembly 9 are all adjusted to the positions required for pre-pressing the electrode piece;

[0032] Then the electrode piece is placed on the passing roller one 4, then the electrode piece is placed between the isolation roller assembly 5 and the adjusting roller assembly 6, then the electrode piece is placed on the passing roller four 14 and the passing roller three 13 on the right side, then the electrode piece is placed between the driving roller assembly 10 and the working wheel assembly 9, then the electrode piece is placed on the passing roller three 13 on the left side, the placement positions of the electrode piece on the passing roller one 4, isolation roller assembly 5, adjusting roller assembly 6 and lifting roller assembly 7 on the left side are the same as the placement positions on the passing roller one 4, isolation roller assembly 5, adjusting roller assembly 6 and lifting roller assembly 7 on the right side;

[0033] In this way, the placement work of the electrode piece in the process of pre-pressing the electrode piece by using the device is completed, then the isolation roller assembly 5 and the driving roller assembly 10 are started, and the pre-pressing work of the electrode piece is started by cooperating with other components in the device.

[0034] The diameters of the active roller 102, the work wheel 922 and the work wheel support roller 924 are determined according to actual requirements.

[0035] Specifically, in order to increase the elongation of the pre-pressed pole piece, thereby improving the quality of the produced pole piece, the force of the pre-pressing of the pole piece can be adjusted, referring to Figure 2 and Figure 3 The isolation roller assembly 5 comprises a motor 51 fixedly connected to the middle part of the rear end of the rear vertical plate 2, and the output end of the motor 51 is fixedly connected with an isolation roller 52 through a shaft coupling. The front end of the isolation roller 52 penetrates through the middle part of the rear end of the rear vertical plate 2 and extends to the front side of the rear vertical plate 2 and is rotatably connected to the middle part of the rear end of the front vertical plate 2.

[0036] Further referring to Figure 2 The adjusting roller assembly 6 comprises two cylinders 63 fixedly connected to the front and rear parts of the upper right side of the mounting plate 1. The output end of each cylinder 63 is fixedly connected with a connecting plate 62, and the two connecting plates 62 are rotatably connected with an isolation roller 61 at one end.

[0037] Further referring to Figure 2 The lifting roller assembly 7 comprises two round rods 72 fixedly connected with fixing blocks 76 at the upper and lower ends. The fixing blocks 76 on the same side are fixedly connected to the upper left side of the rear end of the front vertical plate 2 and the upper left side of the front end of the rear vertical plate 2. The outer surfaces of the two round rods 72 are slidably connected with sliding blocks 73 on the upper and lower sides. The rear end of the front two sliding blocks 73 and the front end of the rear two sliding blocks 73 are fixedly connected with a fixed plate 74. The middle part of one end of the two fixed plates 74 is rotatably connected with a buffer roller 75. The lower part of one end of the two fixed plates 74 is fixedly connected with a cylinder 71, and the left side of the upper part of the two vertical plates 2 is fixedly connected with the cylinder 71.

[0038] In specific implementation, the two cylinders 63 are extended and retracted, thereby driving the isolation roller 61 to lift, adjusting the distance between the isolation roller 52 and the isolation roller 61 to the required distance, thereby changing the force of the pre-pressing of the pole piece during the subsequent pre-pressing of the pole piece by the isolation roller 52 and the isolation roller 61.

[0039] Then the two cylinders 71 are extended and retracted, thereby driving the two sliding blocks 73 on the same side to slide up and down on the round rod 72, thereby driving the buffer roller 75 to move up and down, and adjusting the position of the buffer roller 75 to the required position.

[0040] Then the need for pre-pressing pole piece, first placed on the over roller 1 4, then placed between the isolation roller 1 52 and the isolation roller 2 61, then placed on the over roller 4 14 and the right side of the over roller 3 13, then in the subsequent pole piece is rolled, start motor 1 51, driven by the isolation roller 1 52 rotation between the isolation roller 2 61 and the isolation roller 2 61, start the pole piece of the rolling work;

[0041] In the process of rolling, the over roller 1 4, the isolation roller 1 52, the isolation roller 2 61, the over roller 4 14 and the right side of the over roller 3 13 are all rotatingly connected, so that they can rotate when stressed during pre-pressing, thereby better cooperating with other components to complete the rolling work of the pole piece while preventing the rolling work of the pole piece from being hindered by the inability to rotate;

[0042] As described above, the pole piece is placed in the rolling operation, and the pre-pressing device of the original pole piece is modified to a four-roller structure, which can increase the elongation of the pole piece after pre-pressing, thereby improving the quality of the produced pole piece.

[0043] Specifically, in order to pre-press the pole lug area of the pole piece of different specifications at different positions during pre-pressing of the pole piece, refer to Figure 3 and Figure 4 The driving roller assembly 10 comprises a motor 3 101, the motor 3 101 is fixedly connected with the rear end of the rear side plate 2 3, the output end of the motor 3 101 is fixedly connected with the driving roller 102 through the shaft coupling, and the front end of the isolation roller 1 52 extends through the rear end of the rear side plate 2 3 and is rotatably connected with the rear end of the rear side plate 2 3 and the front side plate 2 3;

[0044] Further refer to Figure 4 The driving assembly 91 comprises three driven assemblies 92 arranged in a rectangular array on the left side of the driving assembly 91;

[0045] Further refer to Figure 5 The driving assembly 91 comprises a threaded rod 914 and three mounting housings 915, the inner surfaces of the three mounting housings 915 are rotatably connected with the worm gears 913, the left ends of the three mounting housings 915 are fixedly connected with the motors 2 911, the output ends of the three motors 2 911 are fixedly connected with the worms 912 through the shaft couplings, the right ends of the three worms 912 extend through the left ends of the mounting housings 915 and extend into the mounting housings 915, the worms 912 and the worm gears 913 on the same side are engaged, the three worm gears 913 are linearly arranged and are in threaded connection with the outer surface of the threaded rod 914, and the threaded rod 914 is fixedly connected with the front end of the rear side plate 2 3;

[0046] Further refer to Figure 4The driven assembly 92 comprises a hydraulic cylinder 921 which is slidingly connected to the upper side of the slide rail 11 and fixedly connected to the right end of the front mounting shell 915. The hydraulic cylinder 921 is fixedly connected to the upper end of the delivery end piston rod. The fixed shell 923 is rotatably connected to the inner surface of the fixed shell 923.

[0047] A plurality of working wheel support rollers 924 are arranged below the working wheel 922. The number of working wheel support rollers can be one or more according to actual needs, and the arrangement mode can be parallel or serial.

[0048] The above motor one 51, three motor twos 911 and motor three 101 are mature technical means in the prior art. The present scheme only uses the functions of controlling the rotation speed, rotation number and starting and stopping at any time of the object. The structure and working principle thereof will not be described in detail here.

[0049] In specific implementation, according to the calendering needs of the tab area of the pole piece, the motor two 911 is started to drive the worm 912 to rotate, thereby driving the worm gear 913 to rotate, moving along the threaded rod 914 forward and backward, thereby driving the mounting shell 915 to move forward and backward, thereby driving the hydraulic cylinder 921 to move forward and backward, and thereby driving the fixed shell 923 to move forward and backward. The positions of the working wheel 922 and the working wheel support roller 924 are adjusted to the required positions.

[0050] Since the three working wheels 922 are controlled by independent motor twos 911, the distance between any two of the three working wheels 922 can be independently adjusted to the required distance. The mutual cooperation between the driving roller assembly 10 and the working wheel assembly 9 can meet the calendering operation of different areas of the tabs of pole pieces of different specifications, so that the extension of the tab area of the calendered pole piece can better match the extension of the coating area, thereby making the plate surface flat.

[0051] According to the above operation, the positions of the three working wheels 922 are adjusted, and after the tabs are placed on the right over roller three 13, the tabs are placed between the driving roller 102 and the three working wheels 922, and then the tabs are placed on the left over roller three 13. Then, according to the placement positions of the tabs of the right over roller one 4, the isolation roller assembly 5, the adjusting roller assembly 6 and the lifting roller assembly 7, the placement of the tabs of the left over roller one 4, the isolation roller assembly 5, the adjusting roller assembly 6 and the lifting roller assembly 7 is completed.

[0052] Then, the three hydraulic cylinders 921 are started to extend and retract the piston rods, thereby driving the three working wheels 922 to ascend and descend, changing the distance between the three working wheels 922 and the driving roller 102, and thereby changing the force of the cooperation between the three working wheels 922 and the driving roller 102 for calendering the tab area of the pole piece.

[0053] Then open motor one 51 and motor three 101, so that the isolation roller assembly 5 and the driving roller assembly 10 are all running, cooperate with other components, start the calendering work to the pole piece, in the running process, because the roll diameter of the upper support roller 8 is larger than the roll diameter of the driving roller 102, can give the driving roller 102 a stable support in the driving roller 102 rotates and calenders the pole piece, thereby reducing the deformation of the driving roller 102 in the calendering work, prolonging the service life of the driving roller 102.

[0054] It needs to be specially pointed out that the specific installation mode of motor one 51, three motor two 911 and motor three 101 and the connection mode and control method of the circuit all belong to the conventional design, and the utility model will not be described in detail.

[0055] The working principle of the utility model is:

[0056] The positions of the adjusting roller assembly 6, the lifting roller assembly 7 and the working wheel assembly 9 are all adjusted to the position required for pre-pressing the pole piece.

[0057] Then the pole piece that needs to be pre-pressed is first placed on the roller one 4, then placed between the isolation roller one 52 and the isolation roller two 61, then placed on the roller four 14 and the right roller three 13, then the lug is placed between the driving roller 102 and the three working wheels 922, and then the lug is placed on the left roller three 13.

[0058] Then open motor one 51 and motor three 101, so that the isolation roller assembly 5 and the driving roller assembly 10 are all running, cooperate with other components, start the calendering work to the pole piece.

[0059] In the above, motor one 51, motor three 101 and motor two 911 can use servo motor or other types of motor in the case.

[0060] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electrode sheet pre-calendering device comprising a mounting plate (1), characterized in that: The right part of upper end of mounting plate (1) is fixedly connected with vertical plate one (2), the middle part of upper end of mounting plate (1) is fixedly connected with vertical plate two (3), the middle part of left side of opposite end of two vertical plate one (2) is rotatably connected with over roller one (4), the middle part of left side of opposite end of two vertical plate one (2) is provided with isolation roller assembly (5), the lower side of isolation roller assembly (5) is provided with adjusting roller assembly (6), the upper part of left side of opposite end of two vertical plate one (2) is provided with lifting roller assembly (7), the middle part of left side of opposite end of two vertical plate one (2) is rotatably connected with over roller four (14), the middle part of left and right side of opposite end of two vertical plate two (3) is rotatably connected with over roller three (13), the left and right part of upper side of opposite end of two vertical plate two (3) is rotatably connected with over roller two (12), the middle part of upper side of opposite end of two vertical plate two (3) is rotatably connected with upper support roller (8), the lower side of upper support roller (8) is provided with driving roller assembly (10), the lower side of driving roller assembly (10) is provided with working wheel assembly (9), the middle part of lower side of opposite end of two vertical plate two (3) is fixedly connected with slide rail (11).

2. The pole piece pre-drawing device according to claim 1, characterized in that: The isolation roller assembly (5) includes servo motor one (51), the servo motor one (51) is fixedly connected with the middle part of rear end of rear vertical plate one (2), the output end of servo motor one (51) is fixedly connected with isolation roller one (52) through a shaft coupling, the front end of isolation roller one (52) penetrates the middle part of rear end of rear vertical plate one (2) and extends to the rear side of front vertical plate one (2) and the middle part of rear end of front vertical plate one (2) rotatably connected.

3. The pole piece pre-drawing device according to claim 1, characterized in that: The adjusting roller assembly (6) includes two air cylinders one (63), the upper end of piston rod of the output end of two air cylinders one (63) is fixedly connected with connecting plate (62), the opposite end of two connecting plates (62) is rotatably connected with isolation roller two (61).

4. The pole piece pre-drawing device according to claim 1, characterized in that: The lifting roller assembly (7) includes two round rods (72), the upper and lower ends of two round rods (72) are fixedly connected with fixed blocks (76), the same side of two fixed blocks (76) is fixedly connected with the upper and lower ends of two round rods (72), the outer surface of two round rods (72) is slidably connected with sliding blocks (73), the rear end of two sliding blocks (73) is fixedly connected with fixed plates (74), the opposite end of two fixed plates (74) is rotatably connected with buffer rollers (75), the lower end of two fixed plates (74) is fixedly connected with air cylinders two (71), the upper end of two air cylinders two (71) is fixedly connected with two vertical plate one (2).

5. The pole piece pre-drawing device according to claim 2, characterized in that: The active roller assembly (10) includes servo motor three (101), servo motor three (101) is fixedly connected with the rear end of the middle part of the rear side of the vertical plate two (3), the output end of the servo motor three (101) is fixedly connected with the driving roller (102) through the shaft coupling, the front end of the isolation roller one (52) extends to the rear end of the middle part of the rear side of the vertical plate two (3) and the rear end of the middle part of the front side of the vertical plate two (3) through the rear end of the middle part of the rear side of the vertical plate two (3), and is rotatably connected with the front side of the vertical plate two (3).

6. The pole piece pre-drawing device according to claim 1, characterized in that: The working wheel assembly (9) includes a driving assembly (91), and the left side of the driving assembly (91) is provided with three driven assemblies (92) in a rectangular array.

7. A pole piece pre-drawing device according to claim 6, characterized in that: The driving assembly (91) includes a threaded rod (914) and three mounting shells (915), the inner surface of the three mounting shells (915) is rotatably connected with a worm wheel (913), the left end of the three threaded rods (914) is fixedly connected with a servo motor two (911), the output end of the three servo motor two (911) is fixedly connected with a worm (912) through the shaft coupling, the right end of the three worm (912) penetrates the left end of the mounting shell (915) and extends into the mounting shell (915), the worm (912) and the worm wheel (913) on the same side are engaged, the three worm wheels (913) are linearly arranged and are in threaded connection with the outer surface of the threaded rod (914), and the threaded rod (914) is fixedly connected with the left lower part of the front end of the rear side of the vertical plate two (3).

8. A pole piece pre-drawing device according to claim 7, characterized in that: The driven assembly (92) includes a hydraulic cylinder (921), the hydraulic cylinder (921) is slidably connected with the upper side of the slide rail (11) and is fixedly connected with the right end of the front side of the servo motor two (911), the delivery end piston rod of the hydraulic cylinder (921) is fixedly connected with a fixed shell (923), and the inner surface of the fixed shell (923) is rotatably connected with a working wheel (922).

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