Coating scraper adjusting device suitable for high-viscosity slurry

Abstract

The invention discloses a coating scraper adjusting device suitable for high-viscosity slurry. The coating scraper adjusting device comprises a coating unit, a distance adjusting unit, a distance fine adjustment unit and a feedback control unit. The coating unit comprises a scraper and a scraper back roller; the distance adjusting unit comprises a servo electric cylinder and an adjusting jackscrew which are used for adjusting the distance between the scraper and the scraper back roller and the distance of the scraper in the local position in the axial direction respectively. The distance fine adjustment unit comprises a servo motor, a speed reducer, a lead screw, a sliding wedge-shaped block and a fixed wedge-shaped block and is used for realizing up-down fine adjustment of the scraper; the feedback control unit comprises a controller and a distance measuring assembly, and the distance measuring assembly is used for measuring the distance between the scraper and the back roller. According to the device, coating diaphragms with different coating thicknesses are obtained by finely adjusting the distance between the coating scraper and the back roller, and meanwhile, the distance is fed back and controlled in real time, so that the uniformity and consistency of the coating thickness of high-viscosity slurry are ensured, and the physical performance and the electrochemical performance of diaphragm products are improved.

Description

Technical Field

[0001] The invention relates to a coating scraper adjusting device suitable for high-viscosity slurry, belonging to the technical field of lithium battery diaphragm coating. Background Art

[0002] The diaphragm is an important component of lithium-ion batteries, and the performance of the diaphragm directly affects the safety and chemical properties of lithium batteries. In the production process of lithium-ion battery diaphragms, the diaphragm slurry needs to be coated on the corresponding diaphragm, then rolled, and then rolled to increase the compactness. The high-viscosity slurry coated diaphragm has gradually become the best choice for lithium-ion battery diaphragms due to its superior high temperature resistance and high strength. However, when the high-viscosity slurry is coated, it is easy to agglomerate when it comes into contact with water. The current micro-concave coating cannot meet the coating requirements, and it is difficult to ensure the coating thickness by the scraper coating method. Summary of the invention

[0003] The purpose of the present invention is to provide a coating scraper adjustment device suitable for high-viscosity slurry, which can obtain high-viscosity slurry coated diaphragms with different coating thicknesses by adjusting the distance between the coating scraper and the back roller. At the same time, real-time feedback and control of the distance between the scraper and the back roller can be performed to ensure the uniformity and consistency of the high-viscosity slurry coating thickness, thereby improving the physical properties and electrochemical properties of the high-viscosity slurry coated diaphragm products.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a coating scraper adjustment device adapted to high-viscosity slurry, comprising a coating unit, wherein the coating unit comprises a frame, a scraper holder, a scraper holder bracket, a scraper and a scraper backing roller, characterized in that it also comprises a spacing adjustment unit, a spacing fine-tuning unit and a feedback control unit, wherein:

[0005] The spacing adjustment unit includes a servo electric cylinder and a row of adjusting screws arranged on the upper part of the scraper. The servo electric cylinder is used to drive the entire scraper assembly to move up and down to adjust the spacing between the scraper and the scraper back roller. The adjusting screw is used to fine-tune the spacing of the local position of the scraper in the axial direction to achieve the consistency of the spacing in the axial direction.

[0006] The spacing fine-tuning unit includes a servo drive unit, a lead screw, a sliding wedge block and a fixed wedge block. The servo drive unit drives the lead screw to rotate and then drives the sliding wedge block to move. The wedge surfaces of the sliding wedge block and the fixed wedge block fit together. The sliding wedge block drives the fixed wedge block to move up and down during the forward and backward movement. The fixed wedge block moves up and down to drive the scraper to fine-tune up and down.

[0007] The feedback control unit includes a controller and a distance measuring component, and the distance measuring component is used to measure the distance between the scraper and the back roller.

[0008] Furthermore, the scraper frame, scraper frame bracket, and scraper constitute a scraper assembly, the scraper frame bracket is set on the side of the frame for sliding up and down through a scraper running guide rail, the scraper frame is fixedly installed at the front end of the scraper frame bracket, and the scraper is fixed on the scraper frame by longitudinal fixation of the scraper and transverse fixation of the scraper.

[0009] Furthermore, the servo electric cylinder is installed on the top of the frame, and the telescopic end of the servo electric cylinder is vertically downward and connected to the scraper frame bracket, which drives the scraper frame bracket to move up and down, thereby driving the scraper frame and the scraper to move up and down together.

[0010] Furthermore, the spacing adjustment unit also includes mechanical limits arranged at both ends of the frame, and the mechanical limits are used to limit the downward movement of the adjusted scraper, which includes an adjusting knob and a support block, and the adjusting knob is used to adjust the position of the support block, and the support block is located below the scraper frame and is used to support the adjusted scraper frame.

[0011] Furthermore, the adjusting top screw includes a top screw, a fixed support on the top screw, an end cover of the upper fixed support and a fixed bracket below the top screw. The fixed support on the top screw is fixed to the upper side of the scraper frame by a fixing nut, the end cover of the upper fixed support is connected to the front end of the fixed support on the top screw by a fixing nut, and the fixed bracket below the top screw is fixed to the side of the scraper by a fixing bolt, and the top screw is threadedly matched with the fixed support on the top screw and the fixed bracket below the top screw.

[0012] Furthermore, the spacing measurement assembly includes a high-precision measuring probe gauge and a probe gauge measuring block, the high-precision measuring probe gauge is installed on the frame through a mounting flange, and the probe gauge measuring block is installed on both sides of the scraper frame. The distance between the scraper and the back roller is measured by the cooperation of the probe of the high-precision measuring probe gauge and the probe gauge measuring block, and the measured data is sent to the controller. After processing and calculating the data, the controller controls the action of the servo motor, and then adjusts the distance between the scraper and the back roller so that it is controlled within the allowable error range.

[0013] Furthermore, the servo drive unit is composed of a servo motor and a reducer. The servo motor is connected to the reducer, and the reducer is fixed to the frame through a mounting flange. One end of the lead screw is connected to the output end of the reducer, and the other end cooperates with the slider on the guide rail. The servo motor is connected to the lead screw through the reducer and drives the lead screw to rotate, thereby driving the sliding wedge block to move.

[0014] Furthermore, the sliding wedge block is fixed to the slider by threads, and the fixed wedge block is fixed to the lower part of the scraper holder bracket by threads, and it contacts and cooperates with the sliding wedge block, and the servo motor and the reducer drive the lead screw to rotate, so that the slider and the sliding wedge block move forward and backward, realizing the scraper fine-tuning up and down.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The coating unit of the present invention drives the scraper back roller to rotate through a servo motor, and cooperates with the scraper and the feeding pipe to realize the basic coating function of the device. In addition, the spacing between the scraper and the back roller can be changed through the spacing adjustment unit, and the consistency of the axial spacing can be adjusted through the upper top screw. On the other hand, the feedback control unit can adjust the spacing between the scraper and the back roller in real time according to the data measured by the high-precision measurement probe and disturbance compensation.

[0017] The present invention can not only obtain high-viscosity slurry coated diaphragms with different coating thicknesses by adjusting the distance between the coating scraper and the back roller, but also can provide real-time feedback and control on the distance between the scraper and the back roller to ensure the uniformity and consistency of the high-viscosity slurry coating thickness, thereby improving the physical properties and electrochemical properties of the high-viscosity slurry coated diaphragm product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the overall structural diagram of the scraper adjustment device suitable for high-viscosity slurry coating of the present invention.

[0019] Figure 2 The present invention is a front view of a scraper adjustment device suitable for high-viscosity slurry coating.

[0020] Figure 3 This is a partial structural diagram of the spacing fine-tuning unit of the scraper adjustment device for coating high-viscosity slurry of the present invention.

[0021] Figure 4 This is a structural diagram of the top wire adjustment portion of the scraper adjustment device for coating high-viscosity slurry according to the present invention.

[0022] Figure 5 The present invention is a schematic diagram of the feedback control process of the scraper adjustment device for coating high-viscosity slurry.

[0023] In the figure, 1-frame support, 2-servo electric cylinder, 3-frame, 4-scraper motion guide rail, 5-probe measuring block, 6-reducer, 7-high-precision measuring probe, 8-scraper back roller, 9-scraper frame, 10-scraper frame bracket, 11-scraper, 12-mechanical limit, 13-support block, 14-servo motor, 15-scraper longitudinal fixation, 16-scraper transverse fixation, 17-wedge block motion guide rail, 18-screw, 19-sliding wedge block, 20-fixed wedge block, 21-adjusting top screw, 22-top screw, 23-upper fixed support end cover, 24-top screw upper fixed support, 25-top screw lower fixed bracket. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See also Figure 1-5, an embodiment provided by the present invention: a coating blade adjustment device adapted to high-viscosity slurry, comprising a coating unit, a spacing adjustment unit, a spacing fine-tuning unit and a feedback control unit; wherein:

[0026] The coating unit includes a frame 3, a scraper frame 9, a scraper frame bracket 10, a scraper 11 and a scraper backing roller 8. The scraper frame 9, the scraper frame bracket 10 and the scraper 11 constitute a scraper assembly. The scraper frame bracket 10 is set on the side of the frame 3 for sliding up and down through a scraper running guide rail 4. The scraper frame 9 is fixedly installed at the front end of the scraper frame bracket 10. The scraper 11 is fixed on the scraper frame 9 through a scraper longitudinal fixation 15 and a scraper transverse fixation 16, and the connection method is a threaded connection.

[0027] The spacing adjustment unit includes a servo electric cylinder 2, a row of adjustment screws 21 arranged on the upper part of the scraper, and a mechanical limit 12. The servo electric cylinder 2 is connected to the servo electric cylinder support on the upper part of the frame 1 shown in the figure through a flange, and the telescopic end of the servo electric cylinder 2 is vertically downward and connected to the scraper frame bracket 10, which drives the scraper frame 9 and the scraper 11 to move up and down by driving the scraper frame bracket 10 to move up and down.

[0028] When the servo electric cylinder 2 is adjusted, the distance between the scraper 11 and the scraper back roller 8 is measured by the high-precision measuring probe 7 and the probe measuring block 5. When the distance between the scraper 11 is adjusted to the set value, the top screw on the mechanical limit 12 is screwed to make the upper end face rise and contact with the scraper frame 9, thereby limiting the downward movement of the scraper 11.

[0029] Preferably, the mechanical limiter 12 includes an adjusting knob and a support block 13. The adjusting knob is used to adjust the position of the support block 13. The support block 13 is located below the scraper frame 9 and is used to support the adjusted scraper frame 9. A conventional screw or rack adjustment structure can be used between the adjusting knob and the support block.

[0030] Preferably, the adjusting top screw 21 includes a top screw 22, a top screw upper fixed support 24, an upper fixed support end cap 23 and a top screw lower fixed support 25, the top screw upper fixed support 24 is fixed to the upper side of the scraper frame 9 by a fixing nut, the upper fixed support end cap 23 is connected to the front end of the top screw upper fixed support 24 by a fixing nut, the top screw lower fixed support 25 is fixed to the side of the scraper 11 by a fixing bolt, and the top screw 22 is threadedly matched with the top screw upper fixed support 24 and the top screw lower fixed support 25. During operation, the nut of the top screw is turned to fine-tune the spacing of the local position of the scraper axial direction to achieve the consistency of the spacing in the axial direction. The fixed nut connection can be replaced by a key connection, a pin connection or a wedge connection, which are all detachable fixed connection methods. In this embodiment, the fixed nut threaded connection is preferred.

[0031] The spacing fine-tuning unit includes a servo motor 14, a reducer 6, a lead screw 18, a sliding wedge block 19 and a fixed wedge block 20. The servo motor 14 is connected to the reducer 6, and the reducer 6 is fixed to the frame 3 through a mounting flange. One end of the lead screw 18 is connected to the output end of the reducer 6, and the other end cooperates with the slider on the guide rail 21. The sliding wedge block 19 is fixed to the slider by threads, and the fixed wedge block 20 is fixed to the lower part of the scraper frame bracket 10 by threads, and it contacts and cooperates with the sliding wedge block 19. The lead screw 18 is driven to rotate by the servo motor 14 and the reducer 6, so that the slider and the sliding wedge block 19 move forward and backward, thereby realizing the up and down fine-motion adjustment of the scraper 11.

[0032] The feedback control unit comprises a controller and a distance measuring component, wherein the distance measuring component is used to measure the distance between the scraper and the back roller.

[0033] Preferably, the spacing measurement component adopts a high-precision measuring probe gauge 7 and a probe gauge measuring block 5, the high-precision measuring probe gauge 7 is installed on the frame 3 through a mounting flange, and the probe gauge measuring block 5 is installed on both sides of the scraper frame 9. The distance between the scraper 11 and the scraper back roller 8 is measured by the probe of the high-precision measuring probe gauge 7 and the probe gauge measuring block 5, and the measured data is sent to the controller. After processing and calculating the data, the controller controls the servo motor 14 to operate, and then adjusts the distance between the scraper 11 and the scraper back roller 8 to control it within the allowable error range.

[0034] In summary, the coating unit of the present invention can drive the scraper back roller to rotate through a servo motor, and cooperate with the scraper and the feeding pipe to realize the basic coating function of the device; the spacing adjustment unit can change the spacing between the scraper and the back roller and adjust the consistency of the axial spacing through the upper top screw; the spacing fine-tuning unit can further realize the scraper fine-tuning up and down; the feedback control unit can adjust the spacing between the scraper and the back roller in real time according to the data measured by the high-precision measurement probe and disturbance compensation.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the present invention in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the present invention. The parts not involved in the present invention are the same as the prior art or can be implemented by the prior art.

Claims

1. A coating scraper adjustment device adapted to high-viscosity slurry, comprising a coating unit, wherein the coating unit comprises a frame, a scraper holder, a scraper holder bracket, a scraper and a scraper backing roller, characterized in that: It also includes a spacing adjustment unit, a spacing fine-tuning unit and a feedback control unit, wherein: The spacing adjustment unit includes a servo electric cylinder and a row of adjusting screws arranged on the upper part of the scraper. The servo electric cylinder is used to drive the entire scraper assembly to move up and down to adjust the spacing between the scraper and the scraper back roller. The adjusting screw is used to fine-tune the spacing of the local position of the scraper in the axial direction to achieve the consistency of the spacing in the axial direction. The spacing fine-tuning unit includes a servo drive unit, a lead screw, a sliding wedge block and a fixed wedge block. The servo drive unit drives the lead screw to rotate and then drives the sliding wedge block to move. The wedge surfaces of the sliding wedge block and the fixed wedge block fit together. The sliding wedge block drives the fixed wedge block to move up and down during the forward and backward movement. The fixed wedge block moves up and down to drive the scraper to fine-tune up and down. The feedback control unit includes a controller and a distance measuring component, and the distance measuring component is used to measure the distance between the scraper and the back roller.

2. The coating blade adjustment device adapted to high viscosity slurry according to claim 1, characterized in that: The scraper frame, scraper frame bracket and scraper constitute a scraper assembly. The scraper frame bracket is set on the side of the frame for sliding up and down through a scraper running guide rail. The scraper frame is fixedly installed at the front end of the scraper frame bracket. The scraper is fixed on the scraper frame by longitudinal fixing of the scraper and transverse fixing of the scraper.

3. The coating blade adjustment device adapted to high viscosity slurry according to claim 2, characterized in that: The servo electric cylinder is installed on the top of the frame, and the telescopic end of the servo electric cylinder is vertically downward and connected to the scraper frame bracket. It drives the scraper frame bracket to move up and down, thereby driving the scraper frame and the scraper to move up and down together.

4. The coating blade adjustment device adapted to high viscosity slurry according to claim 1, characterized in that: The spacing adjustment unit also includes mechanical limits arranged at both ends of the frame, and the mechanical limits are used to limit the downward movement of the adjusted scraper. It includes an adjusting knob and a support block. The adjusting knob is used to adjust the position of the support block. The support block is located below the scraper frame and is used to support the adjusted scraper frame.

5. The coating blade adjustment device adapted to high viscosity slurry according to claim 1, characterized in that: The adjusting top screw includes a top screw, a fixed support on the top screw, an end cover of the upper fixed support and a fixed bracket below the top screw. The fixed support on the top screw is fixed to the upper side of the scraper frame by a detachable fixed connection method, the end cover of the upper fixed support is connected to the front end of the fixed support on the top screw by a detachable fixed connection method, and the fixed bracket below the top screw is fixed to the side of the scraper by a detachable fixed connection method. The top screw is threadedly matched with the fixed support on the top screw and the fixed bracket below the top screw.

6. The coating blade adjustment device adapted to high viscosity slurry according to claim 1, characterized in that: The spacing measurement assembly comprises a high-precision measuring probe gauge and a probe gauge measuring block, and the distance between the scraper and the back roller is measured by the cooperation of the probe of the high-precision measuring probe gauge and the probe gauge measuring block.

7. The coating blade adjustment device adapted to high viscosity slurry according to claim 6, characterized in that: The high-precision measuring probe gauge is installed on the frame through the mounting flange, and the probe gauge measuring block is installed on both sides of the scraper frame. The probe of the high-precision measuring probe gauge cooperates with the probe gauge measuring block to send the measured data to the controller. The controller processes and calculates the data and controls the servo motor to operate, thereby adjusting the distance between the scraper and the back roller so that it is controlled within the allowable error range.

8. The coating blade adjustment device adapted to high-viscosity slurry according to claim 1, characterized in that: The servo drive unit consists of a servo motor and a reducer. The servo motor is connected to the reducer. The reducer is fixed to the frame through a mounting flange. One end of the lead screw is connected to the output end of the reducer, and the other end cooperates with the slider on the guide rail. The servo motor is connected to the lead screw through the reducer and drives the lead screw to rotate, thereby driving the sliding wedge block to move.

9. The coating blade adjustment device adapted to high-viscosity slurry according to claim 8, characterized in that: The sliding wedge block is fixed to the slider through threads, and the fixed wedge block is fixed to the lower part of the scraper frame bracket through threads, and it contacts and cooperates with the sliding wedge block, and the lead screw is driven to rotate by the servo motor and the reducer, so that the slider and the sliding wedge block move forward and backward, realizing the scraper fine-tuning up and down.

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