A power battery protective sheet die cutting and placing device

Abstract

The application discloses a power battery protection sheet die cutting and discharging device and relates to the technical field of die cutting equipment discharging. The device comprises a rack, a discharging shaft which is installed in the rack and is provided with automatic online induction discharging, a transmission roller assembly which guides and tensions the raw material belt discharged by the discharging shaft, a material pulling assembly which is arranged side by side with the rack, pulls the raw material belt discharged by the discharging shaft and cooperates with the discharging of the discharging shaft, and a butt joint assembly which butt joints the head and tail ends of the new and old raw material belts after the discharging shaft is replaced so that the new raw material belt can be conveyed together with the old raw material belt. The head and tail ends of the new and old raw material belts are butt jointed by the butt joint assembly, so that the new raw material belt can be conveyed together with the old raw material belt. In this way, the downtime can be reduced, the time for manually winding the raw material belt around the transmission roller and other components is saved, and the time wasted in the overall replacement of the discharging shaft is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die cutting equipment feeding technology, in particular to a power battery protective sheet die cutting and feeding device. BACKGROUND

[0002] The protective sheet of the power battery has excellent temperature resistance and protection functions, and is widely used in the safety protection of new energy battery packs. The protective sheet generally includes a PET sheet, foam, a protective film or a mica sheet.

[0003] Among them, when die cutting large-size mica, a feeding device is usually used to unwind the mica raw material, and a pulling device and a conveying roller are used to realize the conveying of the mica raw material, so as to complete the subsequent processes of lamination, die cutting and waste shaking.

[0004] At present, the existing feeding device has a feeding device for replacing the unwinding shaft. However, after the unwinding is completed and the new unwinding shaft is replaced, a section of raw material needs to be pulled out manually and wound around the middle conveying roller and the tensioning roller, and then connected to the pulling device, which affects the overall process. SUMMARY

[0005] The present application aims to provide a power battery protective sheet die cutting and feeding device to solve at least one technical problem in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a power battery protective sheet die cutting and feeding device, comprising a rack, further comprising:

[0007] An unwinding shaft installed in the rack and provided with automatic online sensing unwinding;

[0008] A transmission roller assembly for guiding and tensioning the raw material belt unwound from the unwinding shaft;

[0009] A pulling assembly arranged side by side with the rack, which pulls the raw material belt unwound from the unwinding shaft and cooperates with the unwinding of the unwinding shaft;

[0010] An adapter assembly, which connects the head and tail ends of the new and old raw material belts after replacing the unwinding shaft, so that the new raw material belt can be conveyed together with the old raw material belt.

[0011] Preferably, the pulling assembly comprises a front end feeding device and a rear end pulling device, both of which are provided with a circulating conveying belt device, and the front end feeding device and the rear end pulling device are connected by a die cutting machine.

[0012] Preferably, the transmission roller assembly comprises adjusting rollers mounted between the frames in parallel rotation, the raw material belt unwound from the unwinding shaft passes over the adjusting rollers and forms an S shape;

[0013] Further comprising an adjusting part, which comprises a plurality of adjusting grooves opened in the inner wall of the frame, and the adjusting grooves correspond to the adjusting rollers spaced from each other, the inner wall of the adjusting groove is provided with an electric sliding block capable of vertical sliding adjustment, and the corresponding adjusting roller is rotationally mounted on the electric sliding block. When the unwinding shaft is sensed by the online induction to unwind the raw material to the remaining value, the unwinding speed of the unwinding shaft becomes faster, and at the same time, the electric sliding blocks are adjusted upward one by one. When the unwinding of the unwinding shaft is completed, the electric sliding blocks are adjusted downward one by one, and during the upward and downward adjustment, the pulling speed of the pulling assembly remains unchanged.

[0014] Preferably, the docking assembly comprises a docking platform fixed between the frames, the docking platform is located between the unwinding shaft and the adjusting roller, the inner wall of the frame located on both sides of the docking platform is rotationally mounted with a positioning roller, and the inner wall of the frame located above the docking platform is provided with a pressing strip capable of vertical movement. When all the electric sliding blocks are adjusted upward, the pressing strip moves downward and extrudes and fixes the raw material belt;

[0015] Further comprising a bonding assembly for bonding and adhering the raw material belt of the newly replaced unwinding shaft with the raw material belt on the docking platform.

[0016] Preferably, the bonding assembly comprises an elastic telescopic rod mounted above the docking platform and capable of reciprocating swing, the opposite inner walls of the frame are horizontally slidably mounted with mounting frames, the inner wall of the mounting frame is vertically slidably mounted with three sliding blocks, springs are mounted between the three sliding blocks and between the lower sliding block and the bottom of the mounting frame, the telescopic end of the elastic telescopic rod is rotationally connected with the upper sliding block, the lower and middle sliding blocks are rotationally mounted with docking rollers between the opposite sliding blocks, and the outer wall of the middle sliding block is rotationally mounted with a glue applying roller through an extension plate.

[0017] Preferably, the outer walls of the two mounting frames are further jointly provided with a cutter for cutting the raw material belt on the docking platform, and the cutter is vertically movable and electrically controlled.

[0018] Preferably, the inner wall of the frame is provided with a disc capable of uniform rotation, the outer wall of the frame is provided with a servo motor for driving the disc to rotate, the outer wall of the tube of the elastic telescopic rod is provided with a long groove, and the outer wall of the disc away from the center is fixed with a pin block slidably connected with the long groove.

[0019] Preferably, the cutter cooperates with the edge portion of the docking platform to cut the raw material belt.

[0020] Preferably, when the new and old raw material belts are bonded, the new raw material belt is attached to the top of the old raw material belt.

[0021] Preferably, two feeding laminating rollers are installed at a position away from the unwinding shaft, the feeding laminating rollers control the material thickness by adjusting the air cylinder, and the maximum material thickness is 50mm, and the adjusting air cylinder is connected with a digital pressure gauge.

[0022] Compared with the prior art, the application has the following advantages:

[0023] The application connects the head and tail ends of the new and old raw material belts through the connecting assembly, so that the new raw material belt L2 can be transported together with the old raw material belt L1, which not only reduces the downtime, but also saves the time of winding the raw material belt around the conveying roller and other components by manual operation, saves the wasted time of replacing the unwinding shaft, and improves the overall work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The layout diagram of the front end feeding device, the die cutting machine and the rear end pulling device of the application;

[0025] Figure 2 The top view of the application;

[0026] Figure 3 The bottom view of the application;

[0027] Figure 4 The left view of the application;

[0028] Figure 5 The section view along A-A of the application; Figure 4 The section view along A-A of the application;

[0029] Figure 6 The section view along A-A of the application; Figure 5 The state diagram of the unwinding shaft during normal unwinding at the perspective angle;

[0030] Figure 7 The partial section view and the partial enlarged view of the installation frame and the structure thereon of the application;

[0031] Figure 8 The enlarged view of the application without the glue applying roller; Figure 7 The enlarged view of the application without the glue applying roller;

[0032] Figure 9 The partial enlarged view during the connecting process of the application;

[0033] Figure 10 The structure schematic diagram during the connecting process of the application;

[0034] Figure 11 The enlarged exploded view of the disc and the elastic telescopic rod of the application.

[0035] In the figure: 1, rack; 2, unwinding shaft; 3, servo tension feed shaft; 4, feeding laminating roller; 5, adjusting cylinder; 6, digital pressure gauge; 7, adjusting roller; 8, butt joint platform; 9, adjusting groove; 10, electric sliding block; 11, positioning roller; 12, pressing strip; 13, disc; 14, elastic telescopic rod; 15, long groove; 16, pin block; 17, mounting frame; 18, sliding block; 19, spring; 20, butt joint roller; 21, cutter; 22, extension plate; 23, glue roller; 24, front end feeding device; 25, die cutting machine; 26, rear end pulling device; L1, old raw material belt; L2, new raw material belt. DETAILED DESCRIPTION

[0036] 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] Please refer to Figures 1 to 11 The present application provides a technical solution: a die cutting and feeding device for power battery protective sheet, comprising a rack 1, further comprising:

[0038] An unwinding shaft 2 installed in the rack 1 and provided with automatic online sensing unwinding;

[0039] A transmission roller assembly for guiding and tensioning the raw material belt unwound from the unwinding shaft 2;

[0040] A pulling assembly arranged side by side with the rack 1, which pulls the raw material belt unwound from the unwinding shaft 2 and cooperates with the unwinding of the unwinding shaft 2;

[0041] A butt joint assembly, which butt joints the head and tail ends of the new and old raw material belts after replacing the unwinding shaft 2, so that the new raw material belt L2 can be transported together with the old raw material belt L1.

[0042] In the processing procedure of the power battery protective sheet, the raw material belt needs to be unwound from the unwinding shaft 2, and then subsequent laminating, die cutting and other procedures are carried out. In the unwinding process of the raw material belt, a part of the raw material belt is pulled out and connected with the pulling assembly, and then the unwinding speed of the unwinding shaft 2 is controlled through automatic online sensing, and the pulling function of the pulling assembly on the raw material belt is cooperated to complete the conveying function of the raw material belt, and then subsequent procedures are completed;

[0043] At present, most of the racks 1 are provided with automatic feeding devices, that is, the unwinding shaft 2 can be replaced after unwinding. However, after replacing the new unwinding shaft 2, the raw material belt still needs to be pulled out, and then the raw material belt is wound around the transmission roller assembly by manual or other means to be connected with the pulling assembly again to perform the normal transmission and conveying function. This means that the machine needs to be stopped for a period of time after replacing the new unwinding shaft 2 and then started, which affects the overall process. Therefore, by arranging the butt joint assembly, the head and tail ends of the new and old raw material belts are butt jointed after replacing the unwinding shaft 2, so that the new raw material belt L2 can be conveyed together with the old raw material belt L1. In this way, the downtime can be reduced, the time for winding the raw material belt around the transmission roller assembly by manual or other means can be saved, the time wasted in replacing the unwinding shaft 2 can be saved, and the overall work efficiency can be improved.

[0044] In a more preferred embodiment, the pulling assembly includes a front end feeding device 24 and a rear end pulling device 26, and the front end feeding device 24 and the rear end pulling device 26 are both provided with a circulating conveying belt device, and the front end feeding device 24 and the rear end pulling device 26 are connected by a die cutting machine 25.

[0045] The pulling assembly is provided with the front end feeding device 24 and the rear end pulling device 26, so that the raw material belt can be stably and uniformly conveyed after being unwound from the unwinding shaft 2, and the stress on the raw material belt during conveying is relatively uniform.

[0046] In a more preferred embodiment, the transmission roller assembly includes an adjusting roller 7 rotatably arranged between the racks 1 in parallel, and the raw material belt unwound from the unwinding shaft 2 is wound around the adjusting roller 7 and passes through in an S shape.

[0047] The adjusting part includes a plurality of adjusting grooves 9 arranged in the inner wall of the rack 1, and the adjusting grooves 9 correspond to the adjusting rollers 7 spaced from each other. The inner wall of the adjusting groove 9 is provided with an electric sliding block 10 which can be vertically adjusted. The corresponding adjusting roller 7 is rotatably arranged on the electric sliding block 10. When the unwinding shaft 2 is detected by the online sensor that the raw material unwound from the unwinding shaft 2 reaches a remaining value, the unwinding speed of the unwinding shaft 2 becomes faster, and the electric sliding block 10 is adjusted upward one by one. When the unwinding of the unwinding shaft 2 is completed, the electric sliding block 10 is adjusted downward one by one, and the pulling speed of the pulling assembly remains unchanged during the upward and downward adjustment.

[0048] The transmission roller assembly can be specifically referred to Figure 5 and Figure 6 During the conveying of the raw material belt, the raw material belt passes between the adjusting rollers 7, as shown in Figure 6 , to play a guiding and tensioning role.

[0049] When the online sensor senses that the raw material tape on the unwinding shaft 2 is about to be unwound and the remaining value has been reached, the unwinding speed of the unwinding shaft 2 is accelerated at this time, and the electric sliding block 10 starts to move up and adjust, and the raw material tape is lifted up by the adjusting roller 7 installed thereon, so that the upward adjustment of the electric sliding block 10 can store the raw material tape unwound by the unwinding shaft 2 in advance, that is, between the adjusting rollers 7, as shown in Figure 5 The electric sliding block 10 is preferably adjusted upward from back to front in sequence;

[0050] Then, after the last electric sliding block 10 is adjusted, the unwinding shaft 2 stops unwinding, and the first electric sliding block 10 starts to move down to cooperate with the material pulling assembly to transport the pre-stored raw material tape. The electric sliding block 10 is also adjusted downward in sequence, so that the pre-stored raw material tape by the adjusting roller 7 can provide time for the replacement of the unwinding shaft 2, and after the new and old raw material tapes are connected by the connecting assembly, the newly replaced unwinding shaft 2 can be normally unwound;

[0051] In this way, the replacement of the unwinding shaft 2 can be carried out without stopping, so as to ensure the normal operation of the subsequent process and improve the overall work efficiency.

[0052] In one of the more preferred embodiments, an embodiment of the connecting assembly is provided;

[0053] The connecting assembly includes a connecting platform 8 fixed between the racks 1, the connecting platform 8 is located between the unwinding shaft 2 and the adjusting roller 7, and the inner walls of the racks 1 on both sides of the connecting platform 8 are rotatably installed with positioning rollers 11, and the inner walls of the racks 1 above the connecting platform 8 are installed with vertically movable pressing strips 12, which move downward and press and fix the raw material tape when the electric sliding blocks 10 are all adjusted upward;

[0054] It also includes a bonding assembly for bonding and adhering the raw material tape of the newly replaced unwinding shaft 2 to the raw material tape on the connecting platform 8.

[0055] For details, please refer to Figure 5 Generally, the raw material tape and the unwinding shaft 2 are fixed by means of installation joints and the like, so that after the unwinding shaft 2 stops unwinding, the raw material tape will not directly separate from the unwinding shaft 2, thereby avoiding the relaxation of the raw material tape due to the loss of tension.

[0056] However, when replacing the unwinding shaft 2, the raw material belt and the unwinding shaft 2 are first released from the fixing, and the raw material belt is separated from the unwinding shaft 2, so as to avoid loosening of the raw material belt wound on the adjusting roller 7, after the electric sliding block 10 is fully adjusted upward, the pressing strip 12 moves downward to press and fix the raw material belt on the lower butt joint platform 8, and the pressing strip 12 can be directly controlled by a pneumatic cylinder or other electric telescopic cylinder;

[0057] After the raw material belt is pressed and fixed, the unwinding shaft 2 can be replaced, and a new raw material belt L2 is pulled out from the new unwinding shaft 2, so that the new raw material belt L2 is wound around the left positioning roller 11 and is bonded and adhered to the old raw material belt L1 on the butt joint platform 8 through the bonding assembly, so that the new raw material belt L2 can be directly pulled out together with the raw material belt pre-stored in the adjusting roller 7 after the old raw material belt L1 is completely unwound, thereby achieving the purpose of automatic replacement and butt joint, and the machine does not need to be stopped again.

[0058] In one of the more preferred embodiments, a specific implementation of a bonding assembly is provided, which can be specifically referred to in Figures 6-10 ;

[0059] The bonding assembly comprises an elastic telescopic rod 14 installed above the butt joint platform 8 and capable of reciprocating swing, the opposite inner walls of the rack 1 are horizontally slidably installed with mounting frames 17, the inner walls of the mounting frames 17 are vertically slidably installed with three sliding blocks 18, springs 19 are installed between the three sliding blocks 18 and between the lower sliding block 18 and the inner bottom of the mounting frame 17, the telescopic ends of the elastic telescopic rod 14 are rotatably connected with the upper sliding block 18, butt joint rollers 20 are rotatably installed between the lower and middle sliding blocks 18 and between the lower and middle sliding blocks 18 and the opposite sliding blocks 18, and the outer wall of the middle sliding block 18 is rotatably installed with a glue applying roller 23 through an extension plate 22.

[0060] In order to make the new and old raw material belts more closely bonded, and also to make the two side edges of the new and old raw material belts flush, so as to avoid the phenomenon of laterally pulling the new raw material belt L2, after the old raw material belt L1 is pressed tightly by the pressing strip 12, the elastic telescopic rod 14 starts to swing away from the pressing strip 12 under the driving of the external structure, and at the same time, the mounting frame 17 is horizontally moved by the upper sliding block 18, the sliding block 18 applies a downward force and compresses the spring 19 between the sliding blocks 18, so that the butt joint roller 20 installed on the lower sliding block 18 is in close contact with the old raw material belt L1 on the butt joint platform 8, and the old raw material belt L1 is flattened to avoid deviation, and at the same time, the middle sliding block 18 makes the glue applying roller 23 contact the old raw material belt L1 in the process of pressing down, and the surface of the old raw material belt L1 is coated with glue by the rolling of the glue applying roller 23, until the mounting frame 17 slides to the leftmost side and stops;

[0061] At this time, after the new raw material belt L2 is pulled out from the new unwinding shaft 2, the new raw material belt L2 is wound around the two butt joint rollers 20, as shown in Figure 10As shown, at this time, the elastic telescopic rod 14 begins to reset the swing, and the installation frame 17 resets at the same time. In the process of pulling the new material belt L2 by the two butt rollers 20, the new material belt L2 between the butt roller 20 and the unwinding shaft 2 will be straightened, and after being straightened, the new material belt L2 wound on the butt roller 20 will be attached to the old material belt L1 with the rotation of the lower butt roller 20, and will be pressed and bonded with the old material belt L1 under the rolling pressure of the butt roller 20, completing the butt joint process of the new and old material belts.

[0062] It is worth mentioning that the annular convex edge is arranged at the edge position of the butt roller 20, so that the width of the butt roller 20 is the same as the width of the new material belt L2. When the butt roller 20 moves and pulls the new material belt L2 wound thereon, the new material belt L2 can be slightly corrected by its own toughness, so that the two sides can be aligned when the new material belt L2 is attached to the old material belt L1, avoiding the phenomenon of deviation, thereby ensuring the normal progress of the subsequent process.

[0063] In addition, when the installation frame 17 is in the two-side state, the spring 19 between the sliding blocks 18 can overcome the downward component force of the elastic telescopic rod 14, so that the glue roller 23 installed on the middle sliding block 18 will not contact the material belt, so as to prevent the adhesive from being applied to the material belt in other positions.

[0064] In one of the more preferred embodiments, the outer walls of the two installation frames 17 are also jointly provided with a cutter 21 for cutting the material belt on the butt joint platform 8, and the cutter 21 can vertically move and be electrically controlled.

[0065] In order to avoid the excess material belt of the old material belt L1, after the installation frame 17 slides to the left side and stops, the cutter 21 will cut the material belt outside the butt joint platform 8.

[0066] In one of the more preferred embodiments, an embodiment for driving the elastic telescopic rod 14 to reciprocate is provided.

[0067] The inner wall of the rack 1 is provided with a disc 13 capable of rotating at a constant speed, and the outer wall of the rack 1 is provided with a servo motor for driving the disc 13 to rotate. The outer wall of the tube of the elastic telescopic rod 14 is provided with a long groove 15, and the outer wall of the disc 13 away from the center is fixed with a pin block 16 in sliding connection with the long groove 15.

[0068] For details, please refer to Figure 9 and Figure 11The crank slider structure is used to drive the elastic telescopic rod 14 to reciprocate, and the quick return characteristic of the crank slider structure is used to speed up the elastic telescopic rod 14 when driving the installation frame 17 to reset, so that the moving speed of the slider 18 and the butt joint roller 20 is also accelerated, which is more conducive to the tensioning and deviation correction of the new raw material belt L2.

[0069] In one of the more preferred embodiments, the cutter 21 cooperates with the edge portion of the butt joint platform 8 to cut the raw material belt.

[0070] The raw material belt can be cut by cooperating with the edge portion of the butt joint platform 8, or it can be cut in the middle of the butt joint platform 8.

[0071] In one of the more preferred embodiments, when the new and old raw material belts are bonded, the new raw material belt L2 is attached to the top of the old raw material belt L1.

[0072] Referring to Figures 5-6 Since the raw material belt is pulled out upward when passing through the last adjusting roller 7, the old raw material belt L1 can wrap the new raw material belt L2 close to the inside of the adjusting roller 7, so that the two can be prevented from separating at a large bending angle, and can be pulled out of the rack 1.

[0073] In one of the more preferred embodiments, two feeding laminating rollers 4 are installed at a position away from the unwinding shaft 2 of the rack 1, the feeding laminating rollers 4 control the material thickness through the adjusting cylinder 5, and the maximum material thickness is 50mm, and the adjusting cylinder 5 is connected with a digital display pressure gauge 6.

[0074] Since the raw material roll is unwound, there will be a laminating and die cutting process, and the feeding laminating roller 4 can complete the laminating process. When the new raw material belt L2 passes through the feeding laminating roller 4, the overlapping part of the new and old raw material belts will be thicker, so the digital display pressure gauge 6 can directly detect whether the new raw material belt L2 has been pulled out, and then subsequent processing is performed.

[0075] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional type in the existing technology, so the specific description is not made here.

[0076] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A power battery protective sheet die cutting stock device, comprising a rack (1), characterized in that, Also include: The unwinding shaft (2) is installed in the rack (1) and has an automatic online induction unwinding; The transmission roller assembly guides and tensions the raw material belt unwound by the unwinding shaft (2); The material pulling assembly is arranged side by side with the rack (1), and the material pulling assembly pulls the raw material belt unwound by the unwinding shaft (2) and cooperates with the unwinding of the unwinding shaft (2); The butt joint assembly butts the head and tail ends of the new and old raw material belts after replacing the unwinding shaft (2), so that the new raw material belt (L2) can be transported together with the old raw material belt (L1); The butt joint assembly includes a butt joint platform (8) fixed between the racks (1), the butt joint platform (8) is located between the unwinding shaft (2) and the adjusting roller (7), the inner wall of the rack (1) on both sides of the butt joint platform (8) is rotatably installed with a positioning roller (11), and the inner wall of the rack (1) above the butt joint platform (8) is installed with a vertically movable pressing strip (12); Also include an adhesive assembly for bonding the raw material belt of the replaced unwinding shaft (2) with the raw material belt on the butt joint platform (8); The adhesive assembly includes an elastic telescopic rod (14) installed above the butt joint platform (8) and capable of reciprocating swing, the opposite inner walls of the rack (1) are horizontally slidably installed with mounting frames (17), the inner walls of the mounting frames (17) are vertically slidably installed with three sliding blocks (18), springs (19) are installed between the three sliding blocks (18) and between the lower sliding block (18) and the inner bottom of the mounting frame (17), the telescopic ends of the elastic telescopic rod (14) are rotatably connected with the upper sliding block (18), and the butt joint rollers (20) are rotatably installed between the lower and middle sliding blocks (18) and the opposite sliding blocks (18), and the outer wall of the middle sliding block (18) is rotatably installed with a glue applying roller (23) through an extension plate (22).

2. The power cell guard sheet die cutting lay-up apparatus of claim 1, wherein: The material pulling assembly includes a front end feeding device (24) and a rear end material pulling device (26), the front end feeding device (24) and the rear end material pulling device (26) are provided with a circulating conveying belt device, and the front end feeding device (24) and the rear end material pulling device (26) are connected by a die cutting machine (25).

3. The power cell guard sheet die cutting roll device of claim 1, wherein: The transmission roller assembly includes adjusting rollers (7) rotatably installed side by side between the racks (1), the raw material belt unwound by the unwinding shaft (2) passes through the adjusting rollers (7) in an S shape; The adjusting part includes a plurality of adjusting grooves (9) formed in the inner walls of the racks (1), the adjusting grooves (9) correspond to the adjusting rollers (7) spaced from each other, the inner walls of the adjusting grooves (9) are installed with electric sliding blocks (10) capable of vertically sliding adjustment, the corresponding adjusting rollers (7) are rotatably installed on the electric sliding blocks (10), when the unwinding shaft (2) is online and the raw material unwinding on the unwinding shaft (2) reaches a remaining value, the unwinding speed of the unwinding shaft (2) becomes faster, at the same time, the electric sliding blocks (10) are adjusted upward one by one, when the unwinding of the unwinding shaft (2) is completed, the electric sliding blocks (10) are adjusted downward one by one, and the material pulling speed of the material pulling assembly remains unchanged during the upward and downward adjustment.

4. The power cell guard sheet die cutting roll device of claim 1, wherein: The outer walls of the two mounting frames (17) are also provided with cutting knives (21) for cutting the raw material belt on the docking platform (8), and the cutting knives (21) can be vertically moved and are electrically controlled.

5. The power cell guard sheet die cutting roll device of claim 1, wherein: The inner wall of the frame (1) is provided with a disc (13) capable of rotating at a constant speed, the outer wall of the frame (1) is provided with a servo motor for driving the disc (13) to rotate, the outer wall of the elastic telescopic rod (14) is provided with a long groove (15), and the outer wall of the disc (13) away from the center is fixedly provided with a pin block (16) in sliding connection with the long groove (15).

6. The power cell guard sheet die cutting roll device of claim 4, wherein: The cutting knives (21) cooperate with the edge portion of the docking platform (8) to cut the raw material belt.

7. The power cell guard sheet die cutting roll device according to any one of claims 1-6, wherein: When the new and old raw material belts are bonded, the new raw material belt (L2) is attached on the old raw material belt (L1).

8. The power cell guard sheet die cutting roll device according to any one of claims 1-6, wherein: Two feeding laminating rollers (4) are mounted on the frame (1) away from the unwinding shaft (2), the feeding laminating rollers (4) control the material thickness through the adjusting cylinder (5), and the maximum material thickness is 50mm, and the adjusting cylinder (5) is connected with a belt digital pressure gauge (6) capable of reading.

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