Electrode biscuit diaphragm joint calendering device

Abstract

The utility model discloses an electrode biscuit diaphragm joint calendering device which comprises a calendering workbench, a lifting roller and a roller supporting mechanism, a conveying belt is arranged on the calendering workbench, an electrode biscuit diaphragm is horizontally conveyed on the conveying belt, the lifting roller is arranged above the conveying belt in the direction perpendicular to the conveying direction, and the roller supporting mechanism is arranged above the lifting roller. The roller supporting mechanism is arranged below the calendaring workbench, lifts the lifting roller upwards from the two sides of the calendaring workbench and can drive the lifting roller to move up and down, so that the gap distance between the lifting roller and the conveying belt is adjusted; the head section and the tail section of the electrode biscuit membrane on the conveying belt are subjected to lap joint pre-calendering operation through the lifting roller, the lap joint pre-calendering length is set to be 3-5 cm, and the gap distance during calendering is set to be 70%-80% of the original thickness of the electrode biscuit membrane; according to the device, the joint part of the motor biscuit can be pretreated before lap joint, the joint part is pre-extended, the difference of all parts after lap joint of a battery is eliminated, and the consistency of electrodes is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the water system battery pole piece manufacturing equipment technical field, concretely relates to an electrode blank membrane joint calendering device. BACKGROUND

[0002] The conventional preparation process of the water system battery pole piece generally passes through three steps, first, the ceramic powder and the conductive agent used for the electrode are mixed uniformly in the high-speed mixer, PTEE emulsion, additives and a certain amount of solvent are added for dilution and dispersion, the high-speed shearing mixing form is adopted, and the uniform granulation powder is obtained, second, the prepared granulation powder is obtained by rolling to obtain the continuous self-supporting electrode blank membrane, third, the membrane after rolling is further dried, the membrane after drying is rolled again, and finally the large-size porous flexible thick electrode membrane is obtained.

[0003] For the joint of the electrode blank, the conventional method is to directly joint the front and rear two electrode blank membranes, which leads to the inconsistency of the density and porosity of the joint part with other parts, and the electrode with uniform thickness and density cannot be obtained. The material of the joint part is higher in density, hardness and thickness than that of the non-joint part, and these inconsistencies directly affect the performance indicators of the battery. In the patent with the application number CN202321900437.1, the joint structure of the electrode blank membrane is disclosed, the joint part of the two connected electrode blank membranes is respectively provided with a plurality of embedded clamping tables and a plurality of embedded clamping grooves, and the plurality of embedded clamping tables of one electrode blank membrane are embedded and clamped in the plurality of embedded clamping grooves of the other electrode blank membrane in one-to-one correspondence. This method can improve the uniformity of the compaction density of the electrode material, but in the actual production process, it is difficult to realize the one-to-one correspondence of the clamping table and the clamping groove due to the high positioning accuracy requirement, which leads to the local holes (low density points) and local hard blocks (high density points) of the electrode. Based on the demand for improving the consistency of the electrode processing, an electrode blank joint device that is simple to operate and effective is needed to be designed. UTILITY MODEL CONTENTS

[0004] In view of the above problems and technical needs, the utility model provides an electrode blank membrane joint calendering device, which can pretreat the joint part of the electrode blank before jointing, pre-expand the joint part, eliminate the differences between each part after jointing of the battery, and improve the consistency of the electrode.

[0005] The utility model discloses a technical scheme as follows: an electrode blank film sheet joint calendering device, including calendering workstation, lift roller and roller support mechanism, be equipped with conveying belt on the calendering workstation, the electrode blank film sheet is horizontally transmitted on the conveying belt, the lift roller is set up above the conveying belt perpendicularly to the direction of conveyance, the roller support mechanism sets up below the calendering workstation, the roller support mechanism is from the lift roller of two sides of calendering workstation and holds up, the roller support mechanism can drive the lift roller and move up and down, make the lift roller adjust the clearance distance between conveying belt, the lift roller carries out the lap precalendering operation to the first and last two sections of electrode blank film sheet on the conveying belt, and the length of lap precalendering is set as 3-5cm, and the clearance distance when calendering is set as 70%-80% of the original thickness of electrode blank film sheet.

[0006] Further, the roller support mechanism includes a support base, a U-shaped roller support frame, and a drive cylinder. The support base is arranged below the calendering workstation and is U-shaped. Two arms of the support base extend vertically upward through the outside of the calendering workstation. The inner sides of the two arms are provided with sliding rails. Two drive cylinders are arranged in the middle of the support base. The U-shaped roller support frame is connected to the two drive cylinders at the bottom. The two arms of the U-shaped roller support frame are provided with sliding blocks. The sliding blocks are slidingly connected to the sliding rails on the inner sides of the two arms of the support base. The two ends of the lift roller are connected to the top ends of the two arms of the U-shaped roller support frame. The drive cylinder drives the lift roller to move up and down through the U-shaped roller support frame, thereby adjusting the clearance distance between the lift roller and the electrode blank film sheet on the conveying belt to meet the calendering requirements.

[0007] Further, bearings are fixedly installed at the top ends of the two arms of the U-shaped roller support frame. The two ends of the lift roller are rotatably connected to the bearings. Under the action of the bearings, the lift roller can rotate with the conveying of the electrode blank film sheet, thereby reducing the static friction force of the pressing and making the calendering effect more uniform.

[0008] Further, the bottom surface of the support base is provided with a plurality of screw holes. The bottom surface of the support base is fixedly connected to two or more support feet through screws.

[0009] Further, the calendering workstation includes a frame, a head drive wheel, a tail drive wheel, a conveying chain, and a pressure-bearing chain plate. The head drive wheel and the tail drive wheel are respectively connected to the frames at the two ends. The head drive wheel and the tail drive wheel are drivingly connected through two conveying chains. The pressure-bearing chain plate connected at the head and tail is connected to the conveying chains at the two ends. The conveying belt is fixedly arranged on the outer surface of the pressure-bearing chain plate. The frame provides support for the head and tail drive wheels. The conveying chain provides power. The pressure-bearing chain plate has a plate structure and has strong pressure resistance, so it is not easy to deform under the pressure of the lift roller.

[0010] Further, the lift roller is made of stainless steel and is provided with grooves or indentations on the outer surface. The roller made of stainless steel has high calendering strength. The grooves and indentations on the surface can enhance the bonding force of the subsequent lap pressing.

[0011] The electrode blank film sheet joint calendering device has the advantages that the device can pretreat the joint of the electrode blank film sheet, the film sheet is pre-stretched at the two ends before jointing, then the jointing is performed, the calendering device can thin and extend the jointing section of the film sheet according to requirements, so that the problem of uneven thickness and excessive density does not occur when the two jointing sections after calendering are stacked and pressed, the electrode film sheet after winding has uniform thickness, density and porosity, and the performance indexes of the electrode film sheet are stable; the device adjusts the gap distance between the calendering thickness by adjusting the up-down distance of the lifting roller, the operation is simple, the alignment precision of the jointing section after calendering is low, the quality of the finished product is stable, the thickness, hardness and density of the jointing section are greatly reduced compared with those of the standard section, and the consistency of the electrode is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a whole structure diagram of the electrode blank film sheet joint calendering device.

[0013] Fig. 2 It is a cooperation diagram of the lifting roller and the roller supporting mechanism in the utility model.

[0014] Fig. 3 It is an exploded view structure of the lifting roller and the roller supporting mechanism in the utility model.

[0015] In the drawing, the marks are: the calendering workbench 1, the frame 11, the head driving wheel 12, the tail driving wheel 13, the lifting roller 2, the roller supporting mechanism 3, the supporting base 31, the sliding rail 311, the U-shaped roller support 32, the sliding block 321, the bearing 322, the driving cylinder 33, the supporting leg 34, and the conveying belt 4. DETAILED DESCRIPTION

[0016] The utility model will be further described in connection with the drawings and examples.

[0017] As Figs. 1-3 shown is an electrode blank film sheet joint calendering device, which comprises a calendering workbench 1, a lifting roller 2 and a roller supporting mechanism 3, the calendering workbench 1 is provided with a conveying belt 4, the electrode blank film sheet is horizontally transmitted on the conveying belt 4, the lifting roller 2 is vertically arranged above the conveying belt 4 in the conveying direction, the roller supporting mechanism 3 is arranged below the calendering workbench 1, the roller supporting mechanism 3 holds the lifting roller 2 upward from both sides of the calendering workbench 1, and the roller supporting mechanism 3 can drive the lifting roller 2 to move up and down, so that the lifting roller 2 adjusts the gap distance between the conveying belt 4.

[0018] The calendering workbench 1 comprises a frame 11, a head driving wheel 12, a tail driving wheel 13, a conveying chain and a pressure bearing chain plate, the head driving wheel 12 and the tail driving wheel 13 are connected to the frame 11 at two ends respectively, the head driving wheel 12 and the tail driving wheel 13 are connected by two conveying chains, the pressure bearing chain plate is connected to the conveying chain at two ends, and the conveying belt 4 is fixedly arranged on the outer surface of the pressure bearing chain plate. The frame 11 provides support for the head and tail driving wheels, the conveying chain provides power, the pressure bearing chain plate has a plate structure and has strong compression resistance, and can resist the downward pressure of the lifting roller without being easily deformed.

[0019] The roller supporting mechanism 3 comprises a supporting base 31, a U-shaped roller support 32 and a driving cylinder 33, the supporting base 31 is arranged below the calendering workbench 1, the supporting base 31 is U-shaped, two arms of the supporting base 31 are vertically upwardly extended through the outer side of the calendering workbench 1, the inner sides of the two arms are provided with sliding rails 311, two driving cylinders 33 are arranged in the middle of the supporting base 31, the U-shaped roller support 32 is connected to the two driving cylinders 33 at the bottom, the two arms of the U-shaped roller support 32 are provided with sliding blocks 321, the sliding blocks 321 are slidingly connected to the sliding rails 311 on the inner sides of the two arms of the supporting base 31, and the lifting roller 2 is connected to the top ends of the two arms of the U-shaped roller support 32 at two ends. The driving cylinder 33 drives the lifting roller 2 to move up and down through the U-shaped roller support 32, adjusts the gap distance between the lifting roller 2 and the electrode blank film on the conveying belt 4, and adapts to the calendering requirement.

[0020] The top ends of the two arms of the U-shaped roller support 32 are fixedly provided with bearings 322, and the two ends of the lifting roller 2 are rotatably connected in the bearings 322. Under the action of the bearings, the lifting roller 2 can rotate with the conveying of the electrode blank film, reduce the static friction of the pressing, and the calendering effect is more uniform. The bottom surface of the supporting base 31 is provided with a plurality of screw holes, and the bottom surface of the supporting base 31 is fixedly connected to two or more supporting feet 34 through screws.

[0021] The lifting roller 2 performs lap pre-calendering operation on the first and last sections of the electrode blank film on the conveying belt 4, the lap pre-calendering length is set to 3-5 cm, and the gap distance during calendering is set to 70%-80% of the original thickness of the electrode blank film. The lifting roller 2 is made of stainless steel, and the outer surface of the lifting roller 2 is provided with grooves or indentations. The roller made of stainless steel has high calendering strength, and the grooves or indentations on the surface can enhance the bonding force of subsequent lap pressing.

[0022] The utility model discloses a process: electrode green sheet film piece is with the conveyer belt 4 on the calendering workstation 1 forward flow, through the lift roller 2, when the first section of electrode green sheet film piece approaches the lift roller 2 below, drive cylinder 33 retracts downward, lift roller 2 drops, and the gap distance is adjusted to be 70%-80% of the original thickness of electrode green sheet film piece, with the forward flow of electrode green sheet film piece and calendering to the first section, when the calendering length reaches 3-5cm, drive cylinder 33 extends, and lift roller 2 is pushed away from the surface of electrode green sheet film piece and keeps the state of suspension, when the tail section of electrode green sheet film piece approaches the lift roller 2 below, drive cylinder 33 retracts again, and lift roller 2 adjusts the gap distance to be 70%-80% of the original thickness of electrode green sheet film piece again, and the 3-5cm of tail section is calendered, and lift roller 2 rises upward again after calendering, and the pre-calendering processing of one electrode green sheet film piece is completed.

[0023] The above is only the preferable several embodiments of the utility model, but the protection scope of the utility model does not limit to this, and any skilled person in the art can easily think of the change and replacement within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be the protection scope of the claims.

Claims

1. An electrode green sheet joint calendering apparatus characterized by comprising: a first electrode green sheet joint calendering device; a second electrode green sheet joint calendering device; and a third electrode green sheet joint calendering device. The calendering workbench, the lifting roller and the roller supporting mechanism, the conveying belt is horizontally transmitted on the conveying belt, the lifting roller is vertically arranged above the conveying belt in the conveying direction, the roller supporting mechanism is arranged below the calendering workbench, the roller supporting mechanism holds the lifting roller upward from both sides of the calendering workbench, the roller supporting mechanism can drive the lifting roller to move up and down, so that the lifting roller adjusts the gap distance between the conveying belt, the lifting roller performs the lap pre-calendering operation on the first and last two sections of the electrode blank film on the conveying belt, the lap pre-calendering length is 3-5cm, and the gap distance during calendering is 70%-80% of the original thickness of the electrode blank film.

2. An electrode green sheet joint calendering apparatus according to claim 1, characterized by: The roller supporting mechanism comprises a supporting base, a U-shaped roller support and a driving cylinder, the supporting base is arranged below the calendering workbench, the supporting base is U-shaped, two arms of the supporting base vertically extend upward through the outside of the calendering workbench, the inner sides of the two arms are provided with sliding rails, two driving cylinders are arranged in the middle of the supporting base, the bottom of the U-shaped roller support is connected to the two driving cylinders, the two arms of the U-shaped roller support are provided with sliding blocks, and the sliding blocks are slidingly connected to the sliding rails on the inner sides of the two arms of the supporting base.

3. An electrode green sheet joint calendering apparatus according to claim 2, characterized by: The top ends of the two arms of the U-shaped roller support are fixedly provided with bearings, and the two ends of the lifting roller are rotatably connected to the bearings.

4. An electrode green sheet joint calendering apparatus according to claim 3, characterized by: The bottom surface of the supporting base is provided with a plurality of screw holes, and the bottom surface of the supporting base is fixedly connected to two or more supporting feet through screws.

5. An electrode green sheet joint calendering apparatus according to claim 4, characterized by: The calendering workbench comprises a frame, a head driving wheel, a tail driving wheel, a conveying chain and a pressure bearing chain plate, the head driving wheel and the tail driving wheel are connected to the frames at both ends respectively, the head driving wheel and the tail driving wheel are drivingly connected through two conveying chains, the pressure bearing chain plates connected at both ends are connected to the conveying chains, and the conveying belt is fixedly arranged on the outer surface of the pressure bearing chain plate.

6. An electrode green sheet joint calendering apparatus according to claim 5, characterized by: The lifting roller is made of stainless steel, and the outer surface of the lifting roller is provided with grooves or indentations.

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