Positive plate slurry pulling device

Abstract

The invention discloses a slurry pulling device for a positive plate, aiming at optimizing the structure of a scraper and enabling the scraper to scrape slurry on an adhesive tape, the device comprises a rack, a slurry tank and a scraping unit, the slurry tank and the scraping unit are sequentially arranged on the rack from top to bottom, and a foamed nickel base band passes through the scraping unit after being output from the slurry tank; the scraping unit comprises two scraper structures which are oppositely arranged, and a foamed nickel base band can pass through the space between the two scraper structures after being output from the slurry tank; the scraper structure comprises a fixed-thickness scraper and two adhesive tape scrapers which are located on the same horizontal plane, the two adhesive tape scrapers are located at the two ends, in the width direction of the foamed nickel base band, of the fixed-thickness scraper, the adhesive tape scrapers scrape slurry on an adhesive tape, and the fixed-thickness scraper scrapes the slurry on the foamed nickel base band to the preset thickness; belongs to the technical field of positive plate processing.

Description

Technical Field

[0001] The present invention belongs to the technical field of positive electrode sheet processing, and more specifically, relates to a positive electrode sheet slurry drawing device. Background Art

[0002] Among the processes for preparing positive electrode sheets for nickel-hydrogen batteries, the slurry drawing method is the most commonly used method. The main principle is that the foam nickel-based strip is slurried through a slurry tank, and the excess slurry is scraped off with a scraper. After drying, the positive electrode sheet is prepared by rolling, cutting, welding steel strips and other steps. Adhesive tape is pasted on both sides of the foam nickel-based strip along its length. After the slurry drawing and drying are completed, the adhesive tape is torn off, so that clean white edges will appear on both sides of the foam nickel-based strip. There is no slurry at the white edge position, which is convenient for welding the steel strip pole ears.

[0003] There will be slurry attached to the edge tape. This part of the slurry cannot be used, which will be a great waste. Moreover, the slurry attached to the tape will affect the tearing of the tape. The drying time needs to be increased to effectively debond the tape. Otherwise, the tape will be easily torn off frequently, and the production efficiency will be relatively low. Summary of the invention

[0004] The main purpose of the present invention is to provide a positive electrode sheet slurry pulling device, aiming to optimize the structure of the scraper so that the scraper can scrape off the slurry on the tape.

[0005] According to a first aspect of the present invention, a positive electrode sheet slurry pulling device is provided, comprising a frame, a slurry tank and a scraper unit, wherein the slurry tank and the scraper unit are arranged on the frame in sequence from top to bottom, and the foam nickel-based tape passes through the scraper unit after being output from the slurry tank;

[0006] The scraper unit includes two scraper structures arranged opposite to each other, and the foamed nickel-based tape will pass between the two scraper structures after being output from the slurry tank; the scraper structure includes a thickness-setting scraper and two tape scrapers on the same horizontal plane, and the two tape scrapers are located at both ends of the thickness-setting scraper along the width direction of the foamed nickel-based tape. The tape scraper scrapes off the slurry on the tape, and the thickness-setting scraper scrapes the slurry on the foamed nickel-based tape to a preset thickness.

[0007] In the above-mentioned positive electrode sheet pulling device, a mounting plate is provided on the frame, the scraper structure is slidably arranged on the mounting plate, and a first adjustment mechanism and a second adjustment mechanism are provided on the mounting plate. The first adjustment mechanism is connected to the thickness scraper to adjust the position of the thickness scraper along the thickness direction of the foam nickel base strip, and the second adjustment mechanism is connected to the tape scraper to adjust the position of the tape scraper along the thickness direction of the foam nickel base strip.

[0008] In the above-mentioned positive electrode sheet pulling device, the first adjustment mechanism includes at least two first screws arranged at intervals along the width direction of the foam nickel-based strip, the first screws are rotatably set on the mounting plate, the axial direction of the first screw is parallel to the thickness direction of the foam nickel-based strip, and the first screw is rotated to drive the thickness scraper to move.

[0009] In the above-mentioned positive electrode sheet slurry drawing device, the first adjustment mechanism includes a cylinder, the piston rod of the cylinder is connected to the thickness-setting scraper, and the piston rod of the cylinder is extended and retracted to drive the thickness-setting scraper to move.

[0010] In the above-mentioned positive electrode sheet pulling device, the second adjustment mechanism includes a limit block arranged on the mounting plate, the limit block is located on the side of the tape scraper away from the foam nickel-based tape, and a bolt is rotatably arranged on the limit block, and the bolt contacts the tape scraper to push the tape scraper to move.

[0011] In the above-mentioned positive electrode sheet pulling device, a nut is threadedly connected to the bolt, and the nut is located on the side of the limit block close to the tape scraper. A spring is sleeved on the bolt, and the spring is located between the tape scraper and the nut.

[0012] In the above-mentioned positive electrode sheet pulling device, the second adjustment mechanism includes a second screw, which is rotatably arranged on the mounting plate. The axial direction of the second screw is parallel to the thickness direction of the foam nickel-based tape, and the second screw is rotated to drive the tape scraper to move.

[0013] In the above-mentioned positive electrode sheet slurry pulling device, a deviation correction sensor is provided above the scraper structure, and the deviation correction sensor can detect the distance between the scraper structure and the side edge of the foam nickel base belt to determine the position of the foam nickel base belt;

[0014] The frame is provided with a driving module for driving the mounting plate to move along the width direction of the nickel foam base tape. The driving module operates according to the signal of the deviation correction sensor and adjusts the position of the scraper so that the tape scraper is aligned with the tape.

[0015] In the above-mentioned positive electrode sheet slurry drawing device, the distance between the two tape scrapers corresponding to the two scraper structures is smaller than the distance between the two corresponding thickness-setting scrapers.

[0016] In the above-mentioned positive electrode sheet slurry drawing device, the material of the tape scraper is plastic or rubber, and the material of the thickness-setting scraper is metal.

[0017] One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0018] In the present invention, the structure of the scraper is optimized, and the part of the scraper structure used for scraping materials is changed into a three-section structure. The head and tail ends are tape scrapers that can scrape off the slurry on the foam nickel-based tape, and the middle is a thickness-setting scraper that can scrape the slurry on the foam nickel-based tape to a preset thickness. Therefore, under this scraper structure, when scraping materials, both the thickness can be set and the slurry on the tape can be scraped off, thereby preventing the slurry from adhering to the tape and affecting the subsequent tearing of the tape and the quality of the foam nickel-based tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0020] Figure 1 is a schematic structural diagram of a first embodiment of the present invention;

[0021] Figure 2 is a top view of a scraper unit according to a first embodiment of the present invention;

[0022] Figure 3 The first embodiment of the present invention Figure 2 A partial enlarged view of A.

[0023] Among them, the reference numerals of the figures are:

[0024] 1. Frame; 11. Mounting plate; 12. First adjusting mechanism; 121. First screw; 122. Cylinder; 13. Second adjusting mechanism; 131. Limit block; 132. Bolt; 133. Nut; 134. Spring; 135. Second screw; 2. Slurry tank; 21. First slurry coating roller; 22. Second slurry coating roller; 23. Feeding roller; 3. Scraping unit; 31. Scraper structure; 311. Thickness-fixing scraper; 312. Tape scraper; 4. Correction sensor; 5. Drive module. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0027] Reference Figures 1 to 3 As shown, a positive electrode sheet slurry pulling device includes a frame 1, a slurry tank 2 and a scraper unit 3, wherein the slurry tank 2 and the scraper unit 3 are arranged on the frame 1 from top to bottom, and the foam nickel-based tape passes through the scraper unit 3 after being output from the slurry tank 2;

[0028] A first slurry coating roller 21 is provided at the bottom of the slurry tank 2, and a plurality of second slurry coating rollers 22 are provided in the middle of the slurry tank 2. The second slurry coating rollers 22 are divided into at least two groups along the vertical direction, and each group of second slurry coating rollers 22 includes two second slurry coating rollers 22 arranged horizontally at intervals. A feeding roller 23 is provided on the frame 1, and the foamed nickel-based strip is input from the feeding roller 23, passes through the bottom of the first slurry coating roller 21 and between the two second slurry coating rollers 22 of each group of second slurry coating rollers 22 in sequence, and then output from the slurry tank 2; the bottom of the slurry tank 2 is arc-shaped, and when the foamed nickel-based strip passes under the first slurry coating roller 21, the slurry is squeezed onto the foamed nickel-based strip by the first slurry coating roller 21, and when the foamed nickel-based strip passes between the two second slurry coating rollers 22, the slurry is squeezed onto the foamed nickel-based strip by the squeezing of the two second slurry coating rollers 22;

[0029] The scraper unit 3 includes two scraper structures 31 arranged opposite to each other. After the foam nickel-based tape is output from the slurry tank 2, it will pass between the two scraper structures 31; the scraper structure 31 includes a thickness-setting scraper 311 and two tape scrapers 312 on the same horizontal plane. The two tape scrapers 312 are located at both ends of the thickness-setting scraper 311 along the width direction of the foam nickel-based tape. The tape scraper 312 scrapes off the slurry on the tape, and the thickness-setting scraper 311 scrapes the slurry on the foam nickel-based tape to a preset thickness. Under this scraper structure 31, when scraping, both the thickness can be set and the slurry on the tape can be scraped off, so as to avoid the slurry adhering to the tape and affecting the subsequent tearing of the tape and the quality of the foam nickel-based tape.

[0030] In this embodiment, a mounting plate 11 is provided on the frame 1, and a scraper structure 31 is slidably arranged on the mounting plate 11. A first adjusting mechanism 12 and a second adjusting mechanism 13 are provided on the mounting plate 11. The first adjusting mechanism 12 is connected to the thickness scraper 311 to adjust the position of the thickness scraper 311 along the thickness direction of the foam nickel-based strip to ensure that the thickness scraper 311 can scrape the slurry to a preset thickness; the second adjusting mechanism 13 is connected to the tape scraper 312 to adjust the position of the tape scraper 312 along the thickness direction of the foam nickel-based strip to ensure that the tape scraper 312 can contact the tape.

[0031] In this embodiment, the first adjustment mechanism 12 has two modes. The first adjustment mechanism 12 includes at least two first screws 121 arranged at intervals along the width direction of the nickel foam base strip. The first screws 121 are rotatably arranged on the mounting plate 11. The axial direction of the first screws 121 is parallel to the thickness direction of the nickel foam base strip. The first screws 121 are in contact with the thickness-setting scraper 311. The first screws 121 are rotated to push the thickness-setting scraper 311 to move.

[0032] The second first adjustment mechanism 12 includes a cylinder 122, the piston rod of the cylinder 122 is connected to the thickness scraper 311, and the piston rod of the cylinder 122 is extended and retracted to drive the thickness scraper 311 to move;

[0033] The first screw 121 controls the position of the thickness scraper 311 by the degree of rotation, while the cylinder 122 controls the position of the thickness scraper 311 by controlling the stroke; in the present application, one thickness scraper 311 adopts the first first adjustment mechanism 12, and the other thickness scraper 311 adopts the second first adjustment mechanism 12. The thickness scraper 311 with the cylinder 122 will be farther away from the foam nickel-based belt in the initial state, while the thickness scraper 311 without the cylinder 122 will be closer to the foam nickel-based belt. The thickness scraper 311 with the cylinder 122 controls the distance between the two thickness scrapers 311 to facilitate the passage of the foam nickel-based belt, while the thickness scraper 311 without the cylinder 122 only needs fine-tuning.

[0034] In this embodiment, there are also two types of second adjustment mechanisms 13. The first type of second adjustment mechanism 13 includes a limit block 131 arranged on the mounting plate 11. The limit block 131 is located on a side of the tape scraper 312 away from the foam nickel-based tape. A bolt 132 is rotatably arranged on the limit block 131, and the bolt 132 contacts the tape scraper 312 to push the tape scraper 312 to move; a nut 133 is threadedly connected to the bolt 132, and the nut 133 is located on a side of the limit block 131 close to the tape scraper 312. A spring 134 is sleeved on the bolt 132, and the spring 134 is located between the tape scraper 312 and the nut 133; the position of the tape scraper 312 can be adjusted by pushing the bolt 132, and at the same time, based on the elastic force of the spring 134, the tape scraper 312 can be tightly attached to the tape, and the position of the nut 133 can be adjusted, and the elastic force of the spring 134 can be changed by adjusting the position of the nut 133;

[0035] The second type of second adjustment mechanism 13 includes a second screw 135, which is rotatably arranged on the mounting plate 11, and the axial direction of the second screw 135 is parallel to the thickness direction of the foam nickel-based tape, and the second screw 135 is in contact with the tape scraper 312, and the second screw 135 is rotated to push the tape scraper 312 to move, thereby changing the position of the tape scraper 312;

[0036] In the present application, the tape scraper 312 of one scraper structure 31 adopts the first type of second adjustment mechanism 13, and the tape scraper 312 of the other scraper structure 31 adopts the second type of second adjustment mechanism 13. The tape scraper 312 of one scraper structure 31 has the function of elastic pressing, which will force the tape scraper 312 of the other scraper structure 31 to be pressed on the tape.

[0037] In practice, when the nickel foam tape is rolled up, it may move, that is, the nickel foam tape moves along its width direction. At this time, if the scraper structure 31 is fixed, the tape scraper 312 may not be aligned with the tape, and the thickness scraper 311 cannot scrape the material at a suitable position. Therefore, a deflection correction sensor 4 is provided above the scraper structure 31. The deflection correction sensor 4 can detect the distance between it and the side of the nickel foam tape to determine the position of the nickel foam tape.

[0038] The frame 1 is provided with a driving module 5 for driving the mounting plate 11 to move along the width direction of the nickel foam base tape. The driving module 5 acts according to the signal of the deviation correction sensor 4 to adjust the position of the scraper so that the tape scraper 312 is aligned with the tape.

[0039] The mounting plate 11 and the frame 1 are slidably matched through the guide rail slider structure. The driving module 5 is an electric cylinder, which can accurately push the mounting plate 11 to slide. The correction sensor 4 is fixed on the mounting plate 11. There is an initial spacing between the correction sensor 4 and the foam nickel base belt. When the correction sensor 4 detects that the spacing becomes larger or smaller, it gives a signal to the electric cylinder, which controls the moving direction and distance of the mounting plate 11 to return the spacing to the initial spacing.

[0040] In some other embodiments, the correction sensor 4 can be fixed on the frame 1. Then, when the correction sensor 4 is detecting, it uses the position of the last detection as the accuracy to determine the position of the foam nickel base belt and then controls the movement of the mounting plate 11.

[0041] In this embodiment, the distance between the two tape scrapers 312 corresponding to the two scraper structures 31 is smaller than the distance between the two corresponding thickness scrapers 311. The slurry adhering to the tape is relatively small, so the tape scraper 312 should be closer to the nickel foam base tape to ensure that the slurry on the tape is completely removed.

[0042] In this embodiment, the material of the tape scraper 312 is plastic or rubber, and the material of the thickness scraper 311 is metal; since the tape scraper 312 will be attached to the tape, the use of plastic or rubber can protect the foam nickel-based tape and avoid damage to the foam nickel-based tape, while the thickness scraper 311 will not be attached to the foam nickel-based tape, and the use of metal material can improve the stability of the scraping material; of course, the material of the tape scraper 312 is hard plastic or rubber.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A positive electrode sheet slurry pulling device, It is characterized in that It includes a frame, a slurry tank and a scraper unit, wherein the slurry tank and the scraper unit are arranged on the frame in sequence from top to bottom, and the foam nickel-based strip passes through the scraper unit after being output from the slurry tank; The scraper unit includes two scraper structures arranged opposite to each other, and the foamed nickel-based tape will pass between the two scraper structures after being output from the slurry tank; the scraper structure includes a thickness-setting scraper and two tape scrapers on the same horizontal plane, and the two tape scrapers are located at both ends of the thickness-setting scraper along the width direction of the foamed nickel-based tape. The tape scraper scrapes off the slurry on the tape, and the thickness-setting scraper scrapes the slurry on the foamed nickel-based tape to a preset thickness.

2. The positive electrode sheet slurry drawing device according to claim 1, It is characterized in that A mounting plate is provided on the frame, and the scraper structure is slidably arranged on the mounting plate. A first adjusting mechanism and a second adjusting mechanism are provided on the mounting plate. The first adjusting mechanism is connected to the thickness-setting scraper to adjust the position of the thickness-setting scraper along the thickness direction of the foam nickel-based strip, and the second adjusting mechanism is connected to the tape scraper to adjust the position of the tape scraper along the thickness direction of the foam nickel-based strip.

3. The positive electrode sheet slurry drawing device according to claim 2, It is characterized in that The first adjustment mechanism includes at least two first screws arranged at intervals along the width direction of the nickel foam base strip. The first screws are rotatably set on the mounting plate. The axial direction of the first screw is parallel to the thickness direction of the nickel foam base strip. The first screw is rotated to push the thickness scraper to move.

4. The positive electrode sheet slurry drawing device according to claim 2, It is characterized in that The first adjusting mechanism comprises a cylinder, the piston rod of the cylinder is connected to the thickness-setting scraper, and the piston rod of the cylinder is extended and retracted to drive the thickness-setting scraper to move.

5. The positive electrode sheet slurry drawing device according to claim 2, It is characterized in that The second adjustment mechanism includes a limit block arranged on the mounting plate, the limit block is located on the side of the tape scraper away from the foam nickel-based tape, a bolt is rotatably arranged on the limit block, and the bolt contacts the tape scraper to push the tape scraper to move.

6. The positive electrode sheet slurry drawing device according to claim 5, It is characterized in that A nut is threadedly connected to the bolt, and the nut is located on a side of the limiting block close to the tape scraper. A spring is sleeved on the bolt, and the spring is located between the tape scraper and the nut.

7. The positive electrode sheet pulling device according to claim 2, It is characterized in that The second adjustment mechanism includes a second screw rod, which is rotatably arranged on the mounting plate. The axial direction of the second screw rod is parallel to the thickness direction of the foam nickel-based tape. The second screw rod is rotated to push the tape scraper to move.

8. The positive electrode sheet slurry drawing device according to claim 2, It is characterized in that A deviation correction sensor is provided above the scraper structure, and the deviation correction sensor can detect the distance between the scraper structure and the side edge of the foam nickel base belt to determine the position of the foam nickel base belt; The frame is provided with a driving module for driving the mounting plate to move along the width direction of the nickel foam base tape. The driving module operates according to the signal of the deviation correction sensor and adjusts the position of the scraper so that the tape scraper is aligned with the tape.

9. The positive electrode sheet slurry drawing device according to claim 1, It is characterized in that The distance between the two tape scrapers corresponding to the two scraper structures is smaller than the distance between the two corresponding thickness-setting scrapers.

10. The positive electrode sheet slurry drawing device according to claim 1, It is characterized in that The material of the tape scraper is plastic or rubber, and the material of the thickness-setting scraper is metal.

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