Pole piece scribing mechanism

Abstract

The utility model discloses a pole piece lineation mechanism, which is characterized in that a pole piece is placed between a bottom plate and a pressing plate, so that the pole piece can be fixed, then a sliding frame slides along a guide rail, so that four blades are respectively positioned above four lineation grooves, and a cutter adjusting plate moves along the vertical direction under the action of a guide assembly; the knife adjusting plate is pressed down to drive the blade to penetrate through the scribing groove to scribe the pole piece, four notches are formed in the pole piece, four points A, B, C and D are marked on the four notches and are arranged in a square shape, the length ratio of AB, CD, BC and AD before and after rolling is calculated, and the elongation percentage of the pole piece in the transverse and longitudinal X / Y directions is obtained; the length ratio of AC to BD before and after rolling is calculated, and the lateral bending warping rate of the pole piece is obtained.

Description

Technical Field

[0001] This utility model relates to the field of electrode rolling, specifically to an electrode marking mechanism. Background Technology

[0002] With the rapid development of the new energy battery manufacturing industry and technological breakthroughs in battery performance, battery manufacturers are increasingly competing to improve battery energy density and space utilization. To increase battery energy density, rolling equipment is often used to roll the produced electrodes, resulting in higher compaction density over the same area. However, factors such as the roller gaps at both ends, the thickness of the incoming material on both sides, and electrode feeding alignment can cause the electrodes to stretch and warp. For example, during the winding of cylindrical batteries, the warping of the electrodes can cause misalignment and protrusion between the positive and negative electrode tabs. This phenomenon becomes increasingly severe as the diameter of the cylindrical battery increases. Therefore, during the electrode rolling process, it is necessary to test various parameters before and after rolling and adjust these parameters in real time to ensure a high yield rate in the rolling process.

[0003] Traditional elongation testing devices typically perform surface calibration on the electrode sheet and measure the elongation by detecting the calibration data before and after rolling, or by measuring the change in coating surface density. These methods can usually only determine the elongation of the electrode sheet, but cannot determine the elongation of the electrode sheet in the X / Y directions, nor can they determine the side bending warpage of the electrode sheet. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides an electrode marking mechanism, which can solve the problem that the existing electrode elongation detection device cannot detect the elongation of the electrode in the X / Y directions, nor can it determine the side bending warpage of the electrode.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide an electrode marking mechanism, comprising:

[0006] The base includes a base plate;

[0007] A support frame is provided with a pressure plate below the support frame. The pressure plate is disposed opposite to the base plate and is used to clamp the electrode sheet between the pressure plate and the base plate. The pressure plate is provided with four scribing grooves, and the four scribing grooves are arranged in a square.

[0008] The guide rails are provided in four places, all of which are located above the support frame. The four guide rails are arranged in a square, with two of the guide rails oriented in the X direction and the other two in the Y direction.

[0009] The adjusting knife assembly is provided with four adjusting knife assemblies, which include a sliding frame and an adjusting knife plate. The sliding frame is slidably connected with the four guide rails respectively. A guide assembly is arranged between the adjusting knife plate and the sliding frame, which is used to limit the vertical movement of the adjusting knife plate. A blade is arranged below the adjusting knife plate. The cutting direction of the blade of the adjusting knife assembly connected with the X-direction guide rail is the X direction, and the cutting direction of the blade of the adjusting knife assembly connected with the Y-direction guide rail is the Y direction.

[0010] As a further improvement of the above technical solution, an elastic limiting piece is arranged between the sliding frame and the adjusting knife plate, which is used to abut the adjusting knife plate on the sliding frame in the horizontal direction.

[0011] The elastic limiting piece includes a second screw, a spring plunger and a limiting block. The length direction of the second screw is arranged in the horizontal direction. The elastic force direction of the spring plunger is parallel to the length direction of the second screw. The limiting block is slidably connected with the adjusting knife plate. A limiting hole is arranged on the limiting block. The head of the second screw is fixedly connected with the sliding frame, and the tail thereof is gap-fitted with the limiting hole. The bottom end of the spring plunger is fixed on the sliding frame, and the elastic end thereof abuts against the limiting block.

[0012] As a further improvement of the above technical solution, the adjusting knife assembly further includes a sliding block and a differential head. The sliding block is slidably connected with the sliding frame in the horizontal direction. The differential head is installed on the sliding frame. The output end of the differential head is used to abut against and push the sliding block. A pressing block is arranged on the adjusting knife plate, which is used to abut against the sliding block. The opposite surfaces of the pressing block and the sliding block are arranged as inclined surfaces with the same angle, which are used to adjust the height of the pressing block during the movement of the sliding block.

[0013] As a further improvement of the above technical solution, a first guide groove and a sliding groove are arranged on the sliding frame. The length direction of the first guide groove is the same as the movement direction of the sliding block. The sliding block is slidably connected in the sliding groove. The sliding block is provided with a first screw. The tail of the first screw is fixedly connected with the sliding block, and the head thereof is slidably connected in the first guide groove.

[0014] As a further improvement of the above technical solution, the guide assembly includes a second guide groove and a guide column. The second guide groove is long strip-shaped, and is arranged on the sliding frame in the vertical direction. The guide column is arranged on the adjusting knife plate in the horizontal direction, and is slidably connected in the second guide groove.

[0015] As a further improvement of the above technical solution, the four scribing grooves are all cross-shaped, and the inner walls of the four scribing grooves are all provided with chamfers.

[0016] As a further improvement of the above technical solution, the blade is connected with the cutter adjusting plate through the mounting plate, and the cutting part of the blade is located directly below the cutter adjusting assembly.

[0017] As a further improvement of the above technical solution, the cutter adjusting assembly further comprises a compression spring, an axial direction of the compression spring is vertically arranged, one end of the compression spring is connected with the cutter adjusting plate, and the other end is connected with the lower part of the sliding frame.

[0018] As a further improvement of the above technical solution, the support frame is provided with a limiting column near two ends of the four guide rails.

[0019] As a further improvement of the above technical solution, the base further comprises four vertical columns, the four vertical columns are vertically arranged and arranged in a square shape, one end of the vertical column is connected with the bottom plate, and the other end is connected with a foot cup.

[0020] The beneficial effects of the utility model are as follows: the pole piece is placed between the bottom plate and the pressing plate, so that the pole piece can be fixed, then the sliding frame is slid along the guide rail, so that the four blades are located above the four line marking grooves, the cutter adjusting plate is moved in the vertical direction under the action of the guide assembly, the cutter adjusting plate is pressed down to drive the blade to pass through the line marking groove to mark the pole piece, four notches are obtained on the pole piece, four points A, B, C and D are marked on the four notches, the four points A, B, C and D are arranged in a square shape, and the length ratio of AB, CD, BC and AD before and after rolling is calculated to obtain the extension rate of the pole piece in the horizontal and vertical X / Y directions; the length ratio of AC and BD before and after rolling is calculated to obtain the side bending warping rate of the pole piece. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model is further described below in combination with the drawings and examples.

[0022] Figure 1 is the structure schematic diagram of the pole piece line marking mechanism provided by the preferred embodiment of the utility model, and

[0023] Figure 2 is the structure schematic diagram of the pole piece line marking mechanism provided by the preferred embodiment of the utility model, and

[0024] Figure 3 is the structure schematic diagram of the pole piece line marking mechanism provided by the preferred embodiment of the utility model, and

[0025] Figure 4 is the structure schematic diagram of the pole piece line marking mechanism provided by the preferred embodiment of the utility model, and

[0026] Figure 5is another angle schematic view of the knife adjusting assembly of the pole piece line marking mechanism provided by the preferred embodiment of the utility model;

[0027] Figure 6 is another angle schematic view of the knife adjusting assembly of the pole piece line marking mechanism provided by the preferred embodiment of the utility model;

[0028] Figure 7 is Figure 6 another angle schematic view;

[0029] Figure 8 is the structure schematic view of the pole piece after cutting of the pole piece line marking mechanism provided by the preferred embodiment of the utility model.

[0030] Reference signs: 1, base, 2, support frame, 3, pole piece, 4, guide rail, 5, knife adjusting assembly;

[0031] 11, bottom plate, 12, stand, 13, foot cup, 21, pressing plate, 22, limit post, 51, sliding frame, 52, knife adjusting plate, 53, elastic limit piece, 54, sliding block, 55, differential head, 56, compression spring;

[0032] 211, line marking groove, 511, first guide groove, 512, sliding groove, 513, positioning part, 514, positioning clamping block, 515, first side plate, 516, second side plate, 517, abutting block, 518, recess, 521, blade, 522, pressing block, 523, inclined surface, 524, limit block, 525, limit hole, 526, shell, 527, sliding pressing block, 528, connecting block, 529, mounting plate, 531, second screw, 532, spring plunger, 541, first screw, 571, second guide groove, 572, guide column. DETAILED DESCRIPTION

[0033] The utility model discloses a concept, concrete structure and the technical effect produced of the utility model will be clearly and completely described in the following combining with the embodiment and the drawing, to fully understand the purpose, characteristic and effect of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment, on the basis of the embodiment of the utility model, the other embodiment obtained by the person skilled in the art without paying the creative labor, all belong to the protection scope of the utility model. In addition, all the connection / connection relations involved in the patent, not the direct interface of component, but can be according to the specific implementation situation, by adding or reducing the connection auxiliary part, to constitute the better connection structure, such as fixed connection / fixed installation, can select screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and so on according to the need, such as detachable connection, can select screw connection, bolt connection, thread connection, buckle connection, mortise and tenon connection, magic tape connection and so on according to the need. The various technical features in the utility model creation can be interactively combined under the premise of not mutually contradictory conflict.

[0034] Please see Figure 1 And Figure 2 The utility model preferred embodiment provides a kind of polar piece scribing mechanism, including base 1 and support frame 2;Base 1 includes bottom plate 11, the lower portion of support frame 2 is provided with pressing plate 21, pressing plate 21 is oppositely arranged with bottom plate 11, pressing plate 21 and bottom plate 11 are used to hold polar piece 3 between, four scribing grooves 211 are provided on pressing plate 21, and four scribing grooves 211 are arranged in square;Scribing groove 211 is used to determine the position of scribing, while polar piece 3 is scribed, polar piece 3 is fixed by pressing plate 21 and bottom plate 11, can guarantee scribing, polar piece 3 does not occur relative motion near scribing, guarantee scribing precision.

[0035] The polar piece scribing mechanism further includes guide rail 4 and knife adjusting assembly 5, four guide rails 4 are provided and are all arranged above support frame 2, four guide rails 4 are arranged in square, please see Figure 1Two of the guide rails 4 are in the X direction, and the other two guide rails 4 are in the Y direction; four knife adjusting assemblies 5 are arranged, the knife adjusting assembly 5 comprises a sliding frame 51 and a knife adjusting plate 52, the four sliding frames 51 are respectively connected with the four guide rails 4 in a sliding manner, a guide assembly is arranged between the knife adjusting plate 52 and the sliding frame 51, and the guide assembly is used for limiting the vertical movement of the knife adjusting plate 52; a blade 521 is arranged below the knife adjusting plate 52, the cutting direction of the blade 521 of the knife adjusting assembly 5 connected with the X direction guide rail 4 is the X direction, and the cutting direction of the blade 521 of the knife adjusting assembly 5 connected with the Y direction guide rail 4 is the Y direction. The pole piece 3 is placed between the bottom plate 11 and the pressing plate 21, so that the pole piece 3 can be fixed, then the sliding frame 51 is slid along the guide rail 4, so that the four blades 521 are respectively located above the four line marking grooves 211, the knife adjusting plate 52 is moved in the vertical direction under the action of the guide assembly, and the blade 521 is pressed to pass through the line marking groove 211 to mark the pole piece 3, four notches are obtained on the pole piece 3, and four points A, B, C and D are marked on the four notches, the four points A, B, C and D are arranged in a square shape, the length ratio of AB, CD, BC and AD before and after rolling is calculated, and the extension rate of the pole piece 3 in the horizontal and vertical X / Y directions is obtained; the length ratio of AC and BD before and after rolling is calculated, and the side bending warping rate of the pole piece 3 is obtained.

[0036] Please refer to Figure 3 A elastic limiting piece 53 is arranged between the sliding frame 51 and the knife adjusting plate 52, the elastic limiting piece 53 is used for abutting the knife adjusting plate 52 on the sliding frame 51 in the horizontal direction; specifically, the abutting direction of the elastic limiting piece 53 of the knife adjusting assembly 5 with the X direction cutting direction to the knife adjusting plate 52 is the Y direction, the abutting direction of the elastic limiting piece 53 of the knife adjusting assembly 5 with the Y direction cutting direction to the knife adjusting plate 52 is the X direction, and the abutting direction of the elastic limiting piece 53 is the direction close to the guide rail 4, the elastic limiting piece 53 can press the knife adjusting plate 52 on the sliding frame 51, ensure that the line drawn by the blade 521 arranged below the knife adjusting plate 52 is parallel to the guide rail 4, and ensure the accuracy of the line marking.

[0037] Specifically, please refer to Figure 4The elastic limiting piece 53 comprises a second screw 531, a spring plunger 532, and a limiting block 524. The length direction of the second screw 531 is arranged along the horizontal direction. The elastic force direction of the spring plunger 532 is parallel to the length direction of the second screw 531. The limiting block 524 is in sliding connection with the cutter plate 52. The limiting block 524 is provided with a limiting hole 525. The head of the second screw 531 is fixedly connected with the sliding frame 51. The tail of the second screw 531 is in clearance fit with the limiting hole 525. The bottom end of the spring plunger 532 is fixed on the sliding frame 51. The elastic end of the spring plunger 532 is in abutment with the limiting block 524. The spring plunger 532 elastically extrudes the limiting block 524 in the horizontal direction. The limiting block 524 can move along the second screw 531 in the horizontal direction. The cutter plate 52 is in elastic abutment with the limiting block 524. The limiting block 524 presses the cutter plate 52 on the sliding frame 51 in the direction close to the guide rail 4, so as to ensure the scribing accuracy.

[0038] More specifically, the limiting block 524 comprises an outer shell 526 and a sliding pressing block 527. The outer shell 526 is fixed on one side of the sliding pressing block 527. The outer shell 526 is in abutment with the spring plunger 532. The sliding pressing block 527 is in sliding connection with the cutter plate 52. The limiting hole 525 is arranged on the outer shell 526 and the sliding pressing block 527. The arrangement of the outer shell 526 can protect the sliding pressing block 527 and prevent the spring plunger 532 from damaging the sliding pressing block 527.

[0039] Please refer to Figure 5 The cutter assembly 5 further comprises a sliding block 54 and a differential head 55. The sliding block 54 is in sliding connection with the sliding frame 51 along the horizontal direction. The differential head 55 is installed on the sliding frame 51. The output end of the differential head 55 is used to abut against and push the sliding block 54. The cutter plate 52 is provided with a pressing block 522. The pressing block 522 is used to abut against the sliding block 54. The opposite surfaces of the pressing block 522 and the sliding block 54 are provided with inclined surfaces 523 with the same angle. The inclined surfaces 523 are used to adjust the height of the pressing block 522 during the movement of the sliding block 54. The output end of the differential head 55 is abutted against and pushed the sliding block 54. The height of the pressing block 522 is precisely adjusted under the action of the inclined surfaces 523. The cutter plate 52 is moved in the vertical direction by the pressing block 522, so as to realize the precise adjustment of the height of the blade 521 to a greater extent.

[0040] Please refer to Figure 4 and Figure 5The slide 51 is provided with a first guide groove 511 and a slide groove 512. The length direction of the first guide groove 511 is the same as the moving direction of the slider 54, and the slider 54 is slidably connected in the slide groove 512. The slider 54 is provided with a first screw 541. The tail of the first screw 541 is fixedly connected to the slider 54, and its head is slidably connected in the first guide groove 511. During the process of the micrometer head 55 precisely adjusting the height of the blade 521, the slide groove 512 guides the movement of the slider 54, and the cooperation between the first screw 541 and the first guide groove 511 can guide the movement of the slider 54, making it easy to adjust the height of the blade 521.

[0041] Please see Figure 6 and Figure 7 The guiding assembly includes a second guide groove 571 and a guide post 572. The second guide groove 571 is elongated and is vertically positioned on the slide 51. The guide post 572 is horizontally positioned on the adjusting plate 52 and is slidably connected within the second guide groove 571. During the up-and-down movement of the adjusting plate 52, the cooperation between the guide post 572 and the guide groove 571 guides the up-and-down movement of the adjusting plate 52, thus improving the stability of its movement.

[0042] In other embodiments, the guide assembly may also include a slide rail and a slider. The slide rail is vertically mounted on the carriage, and the slider is mounted on the knife adjusting plate. The slider moves along the slide rail, causing the knife adjusting plate to move vertically. The low coefficient of friction between the slider and the slide rail helps to reduce friction and facilitates the movement of the knife adjusting plate.

[0043] Please see Figure 6 and Figure 7 In this embodiment, the carriage 51 includes a first side plate 515 and a second side plate 516 disposed opposite to each other. A first guide groove 511 is disposed on the first side plate 515, and a second guide groove 571 is disposed on the second side plate 516. An abutment block 517 is disposed on the side of the second side plate 516 facing the knife adjusting plate 52. Please refer to [link to relevant documentation]. Figure 4 The blade adjusting plate 52 is clamped between the limiting block 524 and the abutting block 517, and the abutting block 517 is slidably connected to the blade adjusting plate 52. The abutting block 517 can support the blade adjusting plate 52 so that the limiting block 524 and the blade adjusting plate 52 can elastically abut against each other.

[0044] For more details, please see Figure 6 The abutment block 517 has a groove 518 on the side facing the adjusting plate 52. The groove 518 is designed to reduce the contact area between the abutment block 517 and the adjusting plate 52, which helps to reduce the friction between the two and facilitates the sliding of the adjusting plate 52 relative to the abutment block 517.

[0045] Please see Figure 5The adjusting tool assembly 5 further comprises a compression spring 56, an axial direction of the compression spring 56 is vertically arranged, one end of the compression spring 56 is connected with the adjusting tool plate 52, and the other end is connected with the lower portion of the sliding frame 51. When the blade 521 completes the line marking, the compression spring 56 provides a rebounding elastic force, so that the adjusting tool plate 52 can be moved upward, and the blade 521 is prevented from falling when the line marking is not performed and is prepared for the next line marking.

[0046] In the embodiment, two compression springs 56 are arranged, axial directions of the two compression springs 56 are vertically arranged, and the two compression springs 56 are respectively connected to two sides of the adjusting tool plate 52. The two compression springs 56 can respectively provide rebounding elastic forces for the two sides of the adjusting tool plate 52, so that the two sides of the adjusting tool plate 52 can be simultaneously moved upward, and the reset efficiency of the adjusting tool plate 52 is improved.

[0047] Please refer to Figure 3 The upper portion and the lower portion of the sliding frame 51 are respectively provided with a positioning portion 513, the positioning portion 513 comprises two oppositely arranged positioning clamping blocks 514, and the adjusting tool plate 52 is clamped between the two positioning clamping blocks 514. The adjusting tool plate 52 can be prevented from moving in the X direction or the Y direction under the clamping of the positioning clamping blocks 514.

[0048] Please refer to Figure 3 The upper end of the adjusting tool plate 52 is connected with a connecting block 528, the connecting block 528 is used for abutting against the two positioning clamping blocks 514 arranged on the upper portion of the sliding frame 51, and the connecting block 528 can limit the falling height of the adjusting tool plate 52.

[0049] Please refer to Figure 2 The support frame 2 is provided with a limiting column 22 near two ends of the four guide rails 4, the limiting column 22 is used for limiting the movement of the sliding frame 51, and the sliding frame 51 is prevented from being separated from the guide rail 4.

[0050] The inner wall of each of the four line marking grooves 211 is provided with a chamfer, and the chamfer is arranged to facilitate the blade 521 to pass through the line marking groove 211 to cut the pole piece 3.

[0051] Each of the four line marking grooves 211 is a cross shape, the line marking groove 211 is two intersecting long strip-shaped grooves, the width of the line marking groove 211 is equivalent to the thickness of the blade 521, the pole piece 3 near the cutting position can be pressed by the pressing plate 21 when the blade 521 cuts the pole piece 3, the coating of the pole piece 3 near the cutting position is prevented from being lifted by the blade 521, and the coating of the pole piece 3 is protected.

[0052] Please refer to Figure 4The cutting part of the blade 521 is located directly below the knife adjusting assembly 5, and the angle of the blade 521 can be adjusted by adjusting the installation angle of the installation plate 529, so that the blade 521 cuts the pole piece 3 at the optimal inclination angle, which is beneficial to ensure the cutting effect of the blade 521; and the blade 521 arranged directly below the knife adjusting assembly 5 is beneficial to ensure the formation of the cross-shaped cut.

[0053] Please refer to Figure 1 The base 1 further comprises four vertical columns 12, which are vertically arranged in a square arrangement, one end of each of the vertical columns 12 is connected with the bottom plate 11, and the other end is connected with a foot cup 13, the plane angle of the bottom plate 11 can be adjusted through the foot cup 13, so that the bottom plate 11 receives the transmitted pole piece 3 at a suitable angle, and before cutting the pole piece 3, the entire working surface can be parallel to the horizontal plane by adjusting the foot cup 13.

[0054] The test method for the elongation and lateral bending and warping rate of the pole piece provided by the pole piece scribing mechanism of the preferred embodiment of the utility model is implemented through the following steps:

[0055] S0, the plane angle of the bottom plate 11 is adjusted through the foot cup 13, so that the bottom plate 11 receives the transmitted pole piece 3 at a suitable angle;

[0056] S1, the pole piece 3 is placed between the bottom plate 11 and the pressing plate 21, so that the pole piece 3 is clamped between the bottom plate 11 and the pressing plate 21, the pole piece 3 is fixed by the pressing plate 21 and the bottom plate 11 during scribing, which can ensure that the pole piece 3 does not move relatively near the scribed line during scribing, and the scribing precision is ensured; and the entire working surface can be parallel to the horizontal plane by adjusting the foot cup 13;

[0057] S2, the sliding frame 51 is slid along the guide rail 4, so that the four blades 521 are located above the four scribing grooves 211 respectively, the scribing groove 211 is cross-shaped and has intersecting X-direction grooves and Y-direction grooves, in this step, the blade 521 with the cutting direction of the X direction is aligned with the X-direction groove, and the blade 521 with the cutting direction of the Y direction is aligned with the Y-direction groove, so as to determine the scribing position;

[0058] S3, press down the knife adjusting plate 52, the knife adjusting plate 52 drives the knife blade 521 to pass through the scribing groove 211 downward, so that the knife blade 521 cuts the pole piece 3 to obtain two straight line-shaped incisions in the X direction and two straight line-shaped incisions in the Y direction on the pole piece 3; specifically, pressure is applied to the connecting block 528, the knife adjusting plate 52 moves vertically downward, when the connecting block 528 abuts against the two positioning clamping blocks 514, the knife adjusting plate 52 is lowered to the limit position; the slide block 54 is pushed to move by the differential head 55, the height of the pressing block 522 is adjusted under the action of the inclined surface 523, the pressing block 522 drives the knife adjusting plate 52 to move in the vertical direction, so as to realize the precise adjustment of the height of the knife blade 521.

[0059] S31, cancel the pressure on the connecting block 528, under the rebound action of the compression spring 56, the knife adjusting plate 52 drives the knife blade 521 to move upward, so that the knife blade 521 is located above the pole piece 3, avoiding the knife blade 521 from scratching the pole piece 3, and preparing for the next step;

[0060] S4, slide the slide frame 51 along the guide rail 4, replace the knife blade 521 in different cutting directions to pass through the scribing groove 211 downward to cut the pole piece 3, finally obtaining four cross-shaped incisions on the pole piece 3, please refer to Figure 6 , the intersection points of the four incisions are A, B, C and D respectively; specifically, the position of the straight line-shaped incision in the X direction obtained by the pole piece 3 in step S3 obtains the straight line-shaped incision in the Y direction in this step, similarly, the position of the straight line-shaped incision in the Y direction obtained by the pole piece 3 in step S3 obtains the straight line-shaped incision in the X direction in this step, one cross-shaped incision is cut by two knife adjusting assemblies 5 arranged on two adjacent guide rails 4, the cutting mode of moving the knife adjusting plate 52 downward in this step is the same as that in step S3, which will not be described here;

[0061] S40, repeat the above step S31 to prepare for the next scribing;

[0062] S41, take out the pole piece 3 from between the bottom plate 11 and the pressing plate 21, measure the lengths of AB, CD, BC, AD, AC and BD, roll the pole piece 3 by the rolling machine, and measure the lengths of AB, CD, BC, AD, AC and BD after rolling; after rolling by the rolling machine, the pole piece 3 has a higher compaction density in the same area, but also causes a certain extension of the pole piece 3, and causes the pole piece 3 to be laterally bent and warped under the action of the rollers of the rolling machine, measuring the data before and after rolling and recording them is beneficial to grasp the specific extension and lateral bending and warping of the pole piece 3;

[0063] S5, the length ratio of AB, CD, BC, AD before and after rolling is calculated to obtain the elongation of the pole piece 3 in the horizontal and vertical X / Y directions; the length ratio of AC and BD before and after rolling is calculated to obtain the side bending warping rate of the pole piece 3. The length growth degree of AB and CD shows the elongation of the pole piece 3 in the X direction before and after rolling, and the length growth degree of BC and AD shows the elongation of the pole piece 3 in the Y direction before and after rolling; the length shortening degree of AC and BD shows the side bending warping of the pole piece 3 before and after rolling.

[0064] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the embodiments described above. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A polarity marking mechanism, characterized in that, include: The base includes a base plate; A support frame is provided with a pressure plate below the support frame. The pressure plate is disposed opposite to the base plate and is used to clamp the electrode sheet between the pressure plate and the base plate. The pressure plate is provided with four scribing grooves, and the four scribing grooves are arranged in a square. The guide rails are provided in four places, all of which are located above the support frame. The four guide rails are arranged in a square, with two of the guide rails oriented in the X direction and the other two in the Y direction. The tool adjusting assembly includes four such assemblies. Each tool adjusting assembly comprises a slide and a tool adjusting plate. The four slides are slidably connected to four guide rails. A guide assembly is provided between the tool adjusting plate and the slides to restrict the movement of the tool adjusting plate in the vertical direction. Each tool adjusting plate has a blade positioned below it. The cutting direction of the blade of the tool adjusting assembly connected to the guide rail in the X direction is the X direction, and the cutting direction of the blade of the tool adjusting assembly connected to the guide rail in the Y direction is the Y direction.

2. The electrode marking mechanism according to claim 1, characterized in that: An elastic limiting member is provided between the carriage and the blade adjusting plate, and the elastic limiting member is used to abut the blade adjusting plate against the carriage in the horizontal direction; The elastic limiting component includes a second screw, a spring plunger, and a limiting block. The length direction of the second screw is horizontal, and the elastic force direction of the spring plunger is parallel to the length direction of the second screw. The limiting block is slidably connected to the adjusting plate. The limiting block is provided with a limiting hole. The head of the second screw is fixedly connected to the slide, and its tail is clearance-fitted with the limiting hole. The bottom end of the spring plunger is fixed on the slide, and its elastic end abuts against the limiting block.

3. The electrode marking mechanism according to claim 1, characterized in that: The tool adjusting assembly further includes a slider and a differential head. The slider is slidably connected to the carriage in a horizontal direction. The differential head is mounted on the carriage, and its output end is used to abut against and push the slider. A pressure block is provided on the tool adjusting plate. The pressure block is used to abut against the slider. The surfaces of the pressure block and the slider opposite each other are set as inclined planes with the same angle. The inclined planes are used to adjust the height of the pressure block during the movement of the slider.

4. The electrode marking mechanism according to claim 3, characterized in that: The slide is provided with a first guide groove and a slide groove. The length direction of the first guide groove is the same as the moving direction of the slider, and the slider is slidably connected in the slide groove. The slider is provided with a first screw. The tail of the first screw is fixedly connected to the slider, and its head is slidably connected in the first guide groove.

5. The electrode marking mechanism according to claim 1, characterized in that: The guiding assembly includes a second guide groove and a guide post. The second guide groove is elongated and is vertically arranged on the slide. The guide post is horizontally arranged on the knife adjusting plate and is slidably connected to the second guide groove.

6. The electrode marking mechanism according to claim 1, characterized in that: All four scribing grooves are cross-shaped, and the inner walls of all four scribing grooves are chamfered.

7. The electrode marking mechanism according to claim 1, characterized in that: The blade is connected to the blade adjusting plate via a mounting plate, and the cutting part of the blade is located directly below the blade adjusting assembly.

8. The electrode marking mechanism according to claim 1, characterized in that: The blade adjusting assembly also includes a compression spring, the axial direction of which is vertical. One end of the compression spring is connected to the blade adjusting plate, and the other end is connected to the lower part of the slide.

9. The electrode marking mechanism according to claim 1, characterized in that: Limiting posts are provided at both ends of the support frame near the four guide rails.

10. The electrode marking mechanism according to claim 1, characterized in that: The base also includes four columns, all of which are vertically arranged in a square pattern. One end of each column is connected to the base plate, and the other end is connected to a foot cup.

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