A combing device and method for feeding lithium battery electrode sheets

Abstract

The application discloses a carding device for lithium battery electrode sheet blanking and belongs to the technical field of electrode sheet production equipment. The carding device comprises a blanking device, a conveying platform for conveying electrode sheets is arranged on the inner side of the blanking device, two carding frames are symmetrically arranged on the inner wall of the blanking device, two positioning plates are uniformly arranged on the opposite side of each of the two carding frames, a plurality of positioning plates are rotationally connected with a correcting plate on the other side, a positioning structure is arranged on the side of the correcting plate close to the carding frame, the positioning structure can correct the position of the correcting plate by rotating around the positioning plate, a carding rod is arranged at one end of each of the two carding frames, the outer side of the carding rod is on the same horizontal line as the correcting plate, and the correcting plate and the carding rod can card the electrode sheets with position deviation. The application can position the moving and conveying electrode sheets in all directions, card the positions of the plurality of electrode sheets, and avoid the poor processing quality caused by the position deviation of the electrode sheets.

Description

Technical Field

[0001] This application relates to the field of electrode sheet production equipment technology, and more specifically, to a combing device and combing method for feeding lithium battery electrode sheets. Background Technology

[0002] In the production process of lithium batteries, the electrode sheet coating and cutting process is a crucial step that directly impacts production efficiency, product quality, and quantity. Typically, the electrode sheet coating and cutting process involves feeding the electrode sheet coating material into a pressing mechanism using a cutting machine, where it is punched into the desired shape using a die. The cutting machine includes a frame, laser cutting device, adsorption device, transmission device, and dust collection device.

[0003] Chinese Patent No. CN202934243U discloses a laser slicing machine for electrode sheet coating and feeding. The adsorption device is mounted on the transmission frame of the transmission device. The laser cutting device includes a laser blade, a connecting plate, a fixed base, and a motor transmission device. One end of the connecting plate is connected to the laser blade, and the other end is connected to the fixed base. The fixed base is connected to the movable block of the motor transmission device. This laser slicing machine not only ensures the process stability of electrode sheet cutting and saves labor costs, but also improves work efficiency.

[0004] In the existing electrode sheet feeding process, the electrode sheets are conveyed by a transmission belt. During the conveying process, they are easily affected by external forces, which can cause the electrode sheets to shift in position. The shifted electrode sheets are prone to errors when entering the next process. Manually sorting the conveyed electrode sheets is tedious, and it is also inconvenient when there are many electrode sheets being conveyed. In view of this, we propose a sorting device and sorting method for lithium battery electrode sheet feeding.

[0005] Application content

[0006] 1. Technical problems to be solved

[0007] The purpose of this application is to provide a combing device and method for feeding lithium battery electrode sheets, so as to solve the problems mentioned in the background art.

[0008] 2. Technical Solution

[0009] A combing device and method for feeding lithium battery electrode sheets, including a feeding device,

[0010] The feeding device has a conveying platform for transporting electrode sheets on its inner side, and two combing racks are symmetrically arranged on the inner wall of the feeding device.

[0011] Two positioning plates are evenly arranged on each of the two carding frames on opposite sides. A straightening plate is rotatably connected to the other side of the multiple positioning plates. A positioning structure is provided on the side of the straightening plate near the carding frame. The positioning structure corrects the position of the straightening plate to ensure that the straightening plate is parallel to the carding frame.

[0012] Each of the two combing frames has a combing rod at one end. The outer side of the combing rod is at the same horizontal line as the correction plate. The correction plate and the combing rod at the same horizontal line can comb the electrode sheet that is misaligned.

[0013] As an optional solution to the technical solution of this application, the alignment structure includes fixed shafts. Two fixed shafts are symmetrically fixed on the side of the straightening plate near the combing frame. Fixed rods are attached to the opposite sides of the two fixed shafts. Cranks are fixedly connected to the bottom ends of the two fixed rods. A positioning shaft is rotatably connected to the middle of the bottom ends of the two cranks. A knob spring is provided on the outside of the positioning shaft. The two fixed rods are fixedly connected by the fixing spring.

[0014] As an optional solution to the technical solution of this application, the fixing rod is configured as an L-shaped plate;

[0015] The fixing rod consists of an arc-shaped fixing block and an L-shaped plate. The bottom end of the arc-shaped fixing block is fixedly connected to the L-shaped plate. The width ratio of the L-shaped plate to the width of the arc-shaped fixing block is 1:2, and the two L-shaped plates are placed symmetrically so that they do not affect each other.

[0016] The crank is configured as an arc-shaped circular plate, and the two cranks are placed opposite each other.

[0017] As an optional solution to the technical solution of this application, the combing rod includes a fixed plate and a wheel. The fixed plate is fixedly connected to the combing frame. There are two fixed plates, and the two fixed plates are rotatably connected by the wheel.

[0018] The outer side of the wheel is at the same horizontal level as the straightening plate.

[0019] As an optional solution to the technical solution of this application, a connecting plate is fixedly connected to the middle of the top of the combing frame, a sliding rod is slidably connected to the top of the connecting plate, another connecting plate is slidably connected to the other end of the sliding rod, and another combing frame is fixedly connected to the bottom of the other connecting plate.

[0020] As an optional embodiment of the technical solution in this application, the positioning shaft is fixedly installed in the middle of the combing frame, and two abutments are symmetrically arranged at the top of the positioning shaft;

[0021] The two abutments are respectively located at the two bends of the crank.

[0022] As an optional solution to the technical solution of this application, the two sides of the correction plate are set to be arc-shaped, and a flexible wear-resistant layer is provided on the side of the correction plate near the electrode sheet;

[0023] The correction plate is configured as two, and the distance between the two correction plates is less than the length of the electrode sheet.

[0024] As an optional solution to the technical solution of this application, the distance between the two fixed rods and the fixed spring is equal to the distance between the two fixed shafts. In the initial state, the outer sides of the two fixed rods are in contact with the inner sides of the fixed shafts. In the deflection state, one of the fixed rods is in contact with the inner side of one of the fixed shafts.

[0025] A combing method for a combing device used for feeding lithium battery electrode sheets, comprising the following combing steps:

[0026] S1. The staff first pulls the two combing frames according to the size of the electrode sheet, so that the distance between the two combing frames is equal to the size of the electrode sheet;

[0027] S2. Next, the staff starts the device. The conveyor platform carries the electrode sheets in the unloading equipment. The electrode sheets are not adjusted in position during unloading. At this time, some electrode sheets are misaligned. The misaligned electrode sheets first contact the straightening plate. In the initial state, the straightening plate is the same size as the electrode sheets in the normal position. When the electrode sheets are misaligned, they press the straightening plate. The straightening plate rotates around the positioning plate. The rotation of the straightening plate drives the fixed shaft to rotate. The rotation of the fixed shaft presses the fixed rod. The fixed rod presses the fixed spring. The fixed rod drives the crank to move. The crank rotates around the positioning shaft. The rotation of the positioning shaft causes the knob spring to deform elastically. The crank rotates until it presses the stop block. Then the knob spring and the fixed spring recover their elastic deformation. The knob spring drives the crank to rotate in the opposite direction. The crank drives the fixed rod to move in the opposite direction. At this time, the fixed spring recovers its elastic deformation and applies force to the fixed rod. Under the working action of the fixed spring and the crank, the fixed rod presses the fixed shaft in the opposite direction. The fixed shaft drives the straightening plate to rotate until the straightening plate returns to its initial position. The rotation of the straightening plate drives the electrode sheets to rotate, thereby sorting the misaligned electrode sheets and putting them in the normal position.

[0028] S3. Then the conveyor platform continues to transport the electrode sheet that has been restored to its normal position. The next straightening plate further straightens the electrode sheet during transportation to avoid slight deviations during transportation. When the electrode sheet is removed from the conveyor platform and enters the next process, the two sides of the electrode sheet are affected by the wheels in the combing rod. The wheels rotate with the movement of the electrode sheet, thereby limiting the two sides of the electrode sheet through rotation.

[0029] 3. Beneficial effects

[0030] Compared to existing technologies, the advantages of this application are:

[0031] This application utilizes a combing frame to allow the offset electrode plates to move along the conveyor platform. When they reach the straightening plate, the offset electrode plates press against the straightening plate, causing it to rotate around the positioning plate. This rotation of the straightening plate activates the alignment structure. The fixed shaft in the alignment structure rotates with the straightening plate, applying force to the fixed rod along the fixed shaft. The fixed rod moves, compressing the fixed spring, causing it to elastically contract. Simultaneously, the fixed rod drives the crank to move, rotating around the positioning shaft. This rotation of the positioning shaft causes the knob spring to elastically deform. The crank rotates until it contacts the stop block, which obstructs the crank's rotation. At this point, the knob spring recovers its elastic deformation, driving the crank to rotate in the opposite direction around the positioning shaft. Simultaneously, the fixed spring recovers its elastic deformation... The fixed rod applies a counterforce, and under the action of the reverse crank and the extended fixed spring, the fixed rod moves towards the fixed shaft. The fixed shaft moves with the fixed rod, and the fixed shaft drives the fixed rod to move in the opposite direction, thereby adjusting the misaligned electrode to the normal position. The two sets of straightening plates work synchronously to ensure that the electrode, which has returned to the normal position, moves smoothly inside the unloading equipment. When the conveying platform transports the electrode from the unloading equipment to the next process flow, the inner wheel of the combing rod rotates to transport the electrode on one hand, and to ensure that the electrode does not shift its position again. This allows for all-round alignment of the moving electrode, combing the positions of multiple electrode pieces, and avoiding poor processing quality caused by the electrode shifting its position when it is transported to the next process, thus improving the practicality of the device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the combing device for feeding lithium battery electrode sheets disclosed in a preferred embodiment of this application;

[0033] Figure 2 This is a cross-sectional schematic diagram of the overall structure of the combing device for feeding lithium battery electrode sheets disclosed in a preferred embodiment of this application.

[0034] Figure 3 This is a schematic diagram of the combing frame connection of the combing device for feeding lithium battery electrode sheets, as disclosed in a preferred embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the upright structure connection of the combing device for feeding lithium battery electrode sheets disclosed in a preferred embodiment of this application;

[0036] Figure 5 This is a side view of the combing frame of the combing device for feeding lithium battery electrode sheets disclosed in a preferred embodiment of this application;

[0037] The following are the labels in the diagram: 1. Feeding equipment; 2. Conveying platform; 3. Combing frame; 31. Combing rod; 32. Positioning plate; 33. Straightening plate; 331. Fixed shaft; 332. Fixed rod; 333. Crank; 334. Positioning shaft; 335. Knob spring; 336. Fixed spring; 34. Abutment block; 4. Connecting plate; 5. Slide rod. Detailed Implementation

[0038] Please see Figure 1-3 This application provides a technical solution:

[0039] refer to Figure 1 and Figure 2 The feeding device 1 has a conveying platform 2 for transporting electrode sheets inside. Two combing frames 3 are symmetrically arranged on the inner wall of the feeding device 1. Two positioning plates 32 are evenly arranged on opposite sides of the two combing frames 3. A straightening plate 33 is rotatably connected to the other side of the positioning plates 32. The distance between the two straightening plates 33 on one side is less than the outer length of the electrode sheet. Before the electrode sheet is completely removed from the previous straightening plate 33, its front end contacts the next straightening plate 33 to ensure the continuity of electrode sheet transmission and the integrity of the position adjustment process. The straightening plate 33 is arc-shaped on both sides to avoid collision between the electrode sheet and the straightening plate 33, which would cause damage to the electrode sheet. A flexible wear-resistant layer is provided on the side of the straightening plate 33 near the electrode sheet to reduce the damage to the straightening plate 33 caused by friction between the electrode sheet and the surface of the straightening plate 33 during transmission, and to improve the service life of the device.

[0040] refer to Figure 3 and Figure 4 The straightening plate 33 has a positioning structure on the side near the carding frame 3. The positioning structure includes a fixing shaft 331. Two fixing shafts 331 are symmetrically fixed on the side of the straightening plate 33 near the carding frame 3. Fixing rods 332 are attached to opposite sides of the two fixing shafts 331. Cranks 333 are fixedly connected to the bottom ends of the two fixing rods 332. The fixing rods 332 are L-shaped plates, consisting of an arc-shaped fixing block and an L-shaped plate. The bottom end of the arc-shaped fixing block is fixedly connected to the L-shaped plate. The width of the L-shaped plate is the same as the width of the arc-shaped fixing block. The ratio is 1:2, and the two L-shaped plates are placed symmetrically without affecting each other. The crank is set as an arc-shaped circular plate, and the two cranks are placed opposite each other. The bottom middle of the two cranks 333 is rotatably connected to the positioning shaft 334. A knob spring 335 is set on the outside of the positioning shaft 334. The positioning shaft 334 is fixedly set in the middle of the combing frame 3. Two abutments 34 are symmetrically set at the top of the positioning shaft 334. The two abutments 34 are respectively set at the bend of the two cranks 333. The two fixing rods 332 are fixedly connected by the fixing spring 336.

[0041] The fixed shaft 331 rotates with the straightening plate 33, applying a force to the fixed rod 332. The fixed rod 332 moves and compresses the fixed spring 336, causing the fixed spring 336 to elastically contract. At the same time, the fixed rod 332 drives the crank 333 to move, and the crank 333 rotates around the positioning shaft 334. The rotation of the positioning shaft 334 causes the knob spring 335 to elastically deform. The crank 333 rotates until it contacts the stop block 34, which resists the rotation of the crank 333. At this time, the knob spring 335 recovers its elastic deformation, driving the crank 333 to rotate in the opposite direction around the positioning shaft 334. As the crank 333 rotates in the opposite direction, the fixed spring 336 recovers its elastic deformation and applies a reverse force to the fixed rod 332. The fixed rod 332, with the rotating crank 333 and the extended fixed spring 336, exerts a force in the opposite direction. Under the action of 36, it moves towards the fixed shaft 331. The fixed shaft 331 moves with the fixed rod 332. The fixed shaft 331 drives the fixed rod 332 to move in the opposite direction, thereby adjusting the electrode sheet that has been misaligned to the normal position. The alignment structure corrects the position of the straightening plate 33, ensuring that the straightening plate 33 is parallel to the carding frame 3. The two sets of straightening plates work synchronously to ensure that the electrode sheet that has been restored to the normal position moves smoothly inside the unloading equipment. When the conveying platform conveys the electrode sheet from the unloading equipment to the next process flow, the inner wheel of the carding rod rotates to transport the electrode sheet on the one hand, and to ensure that the electrode sheet will not be misaligned again on the other hand. This allows for all-round alignment of the moving electrode sheet and carding of multiple electrode sheet positions, avoiding poor processing quality caused by the electrode sheet being misaligned when it is transferred to the next process, and improving the practicality of the device.

[0042] refer to Figure 1 and Figure 2 Two combing frames 3 are provided with combing rods 31 at one end. The combing rods 31 include a fixed plate and a wheel. The fixed plate is fixedly connected to the combing frame 3. There are two fixed plates. The two fixed plates are rotatably connected by the wheel. The outer side of the combing rod 31 is on the same horizontal line as the straightening plate 33. The straightening plate 33 and the combing rod 31 on the same horizontal line can ensure the stability of the electrode sheet transmission process.

[0043] When the electrode sheet is adjusted to the normal position and enters the next process, the conveyor platform 2 only transports the part of the electrode sheet that is in contact with it. The two sides of the electrode sheet are in contact with the combing rods 31. While the two combing rods 31 maintain the position of the electrode sheet, the electrode sheet moves forward and the wheel rotates accordingly, applying force to the two sides of the electrode sheet in the opposite direction, so that the electrode sheet can smoothly enter the next process flow, reducing the instability of the electrode sheet transfer process and improving the practicality of the device.

[0044] A connecting plate 4 is fixedly connected to the top center of the combing frame 3. A sliding rod 5 is slidably connected to the top of the connecting plate 4. Another connecting plate 4 is slidably connected to the other end of the sliding rod 5. Another combing frame 3 is fixedly connected to the bottom of the other connecting plate 4.

[0045] Push the outer combing rod 31 of the feeding device 1. The combing rod 31 drives the combing frame 3 to move. The combing frame 3 drives the connecting plate 4 to move. The connecting plate 4 slides on the outside of the slide rod 5, thereby increasing or decreasing the distance between the two combing frames 3, making it suitable for electrode sheets of more sizes and improving the applicability of the device.

[0046] Before feeding and transferring the electrode sheets, the workers first pull the two combing frames 3 according to the size of the electrode sheets, so that the distance between the two combing frames 3 is equal to the size of the electrode sheets.

[0047] When the electrode sheet is being fed and transported, the conveyor platform 2 is activated to prevent the electrode sheet on its surface from being transported in the feeding device 1. When the electrode sheet is misaligned due to external forces, the misaligned electrode sheet first contacts the straightening plate 33. Initially, the straightening plate 33 is the same size as the electrode sheet in its normal position. When the electrode sheet is misaligned, it presses against the straightening plate 33. The straightening plate 33 rotates around the positioning plate 32. The rotation of the straightening plate 33 drives the fixed shaft 331 to rotate. The rotation of the fixed shaft 331 presses against the fixed rod 332. The fixed rod 332 presses against the fixed spring 336. The fixed rod 332 drives the crank 333 to move. The crank 333 rotates around the positioning shaft 334. The rotation of the positioning shaft 334 causes the knob spring 335 to deform elastically. The crank 333 rotates until it presses against the stop block 34. Then, the knob spring 335 and the fixed spring 336 recover their elastic deformation. The knob spring 335 drives the crank 333 to rotate in the opposite direction. The crank 333 drives the fixed rod 332 to move in the opposite direction. When the fixed spring 336 recovers its elastic deformation, it simultaneously applies force to the fixed rod 332. Under the action of the fixed spring 336 and the crank 333, the fixed rod 332 presses the fixed shaft 331 in the opposite direction. The fixed shaft 331 drives the straightening plate 33 to rotate until the straightening plate 33 returns to its initial position. The rotation of the straightening plate 33 drives the electrode sheet to rotate, thereby sorting the electrode sheet that has deviated from its position and bringing it to the normal position. Then, the conveyor platform 2 carries the electrode sheet that has returned to the normal position to continue to be transported. The next straightening plate 33 further sorts the electrode sheet during transportation to avoid slight deviations during transportation until the electrode sheet is removed from the conveyor platform 2 and enters the next process. When the electrode sheet enters the next process, the two sides of the electrode sheet are affected by the wheel in the combing rod 31. The wheel rotates with the movement of the electrode sheet, thereby limiting the two sides of the electrode sheet by rotation, ensuring that it is in the correct position when entering the next process, improving the practicality of the device, and avoiding the deviation of the electrode sheet caused by external forces, which would affect the processing of the next process.

[0048] Although examples of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery electrode sheet blanking carding device, comprising: a blanking device and a conveying platform, characterized in that: the blanking device is provided with a conveying platform inside for conveying the electrode sheet, and two carding frames are symmetrically arranged on the inner wall of the blanking device; two said carding frames are uniformly provided with two positioning plates on opposite sides, a plurality of said positioning plates are rotatably connected with a correcting plate on the other side, the correcting plate is provided with a positioning structure on the side close to the carding frame, the positioning structure is rotatable around the positioning plate to correct the position of the correcting plate, ensuring that the correcting plate is parallel to the carding frame; two said carding frames are provided with carding rods at one end, the carding rods are on the same horizontal line with the correcting plate, and the correcting plate and the carding rod on the same horizontal line can card the electrode sheet with positional deviation; the positioning structure comprises a fixed shaft, two fixed shafts are symmetrically fixed on the side of the correcting plate close to the carding frame, two fixed rods are attached to opposite sides of the two fixed shafts, two cranks are fixedly connected to the bottom ends of the two fixed rods, two positioning shafts are rotatably connected to the middle part of the bottom end of the two cranks, a knob spring is arranged on the outside of the positioning shaft, and the two fixed rods are fixedly connected by a fixed spring; the fixed rod is provided as an L-shaped plate, the fixed rod is composed of an arc-shaped fixed block and an L-shaped plate, and the bottom end of the arc-shaped fixed block is fixedly connected with an L-shaped plate; the crank is provided as an arc-shaped circular plate, and two said cranks are placed opposite to each other; the positioning shaft is fixedly arranged in the middle part of the carding frame, and two abutting blocks are symmetrically arranged on the top end of the positioning shaft; two said abutting blocks are respectively arranged at the bending parts of two cranks; the correcting plate is provided as arc-shaped on both sides, and a flexible wear-resistant layer is arranged on the side of the correcting plate close to the electrode sheet; the correcting plate is provided as two, and the distance between the two correcting plates is less than the length of the electrode sheet; the distance between the two fixed rods and the fixed spring is equal to the distance between the two fixed shafts, the outer side of the two fixed rods is attached to the inner side of the fixed shaft in the initial state, and one of the fixed rods is attached to the inner side of one of the fixed shafts in the deflected state. the carding rod comprises a fixed plate and a circular wheel, the fixed plate is fixedly connected with the carding frame, the fixed plate is provided as two, and the two fixed plates are rotatably connected by a circular wheel; 2. The combing device for lithium battery electrode sheet blanking according to claim 1, characterized in that: the circular wheel is on the same horizontal line with the correcting plate. the top end of the connecting plate is slidingly connected with a sliding rod, the other end of the sliding rod is slidingly connected with another connecting plate, and the bottom end of the other connecting plate is fixedly connected with another carding frame.

3. The combing device for lithium battery electrode sheet blanking according to claim 1, characterized in that:

4. A carding method of a lithium battery electrode sheet blanking carding device, using the lithium battery electrode sheet blanking carding device of claim 2, characterized by: S1. The staff first pulls the two carding frames according to the size of the electrode sheet, so that the distance between the two carding frames is equal to the size of the electrode sheet; ​ S2. Then the staff starts the device, the transmission platform drives the electrode sheet to transmit in the discharging equipment, and the position of the electrode sheet is not adjusted when it is discharged. At this time, part of the electrode sheet position deviates, and the deviated electrode sheet first contacts the correction plate. The correction plate is equal in size to the electrode sheet in the normal position in the initial state. When the electrode sheet position deviates, the correction plate is extruded. The correction plate rotates around the positioning plate, which drives the fixed shaft to rotate. The fixed shaft extrudes the fixed rod, which extrudes the fixed spring. The fixed rod drives the crank to move, which rotates around the positioning shaft. The positioning shaft rotates to drive the knob spring to elastically deform. The crank rotates until it extrudes the stop block. Then the knob spring and the fixed spring elastically deform and recover. The knob spring drives the crank to rotate in the opposite direction. The crank drives the fixed rod to move in the opposite direction. At this time, the fixed spring elastically deforms and recovers, and at the same time, it applies force to the fixed rod. The fixed rod is extruded in the opposite direction under the action of the fixed spring and the crank. The fixed shaft drives the correction plate to rotate until the correction plate returns to the initial position. The correction plate rotates to drive the electrode sheet to rotate, thereby combing the electrode sheet deviating from the position to make it in the normal position; S3. Then the transmission platform drives the electrode sheet that has returned to the normal position to continue transmission. The next correction plate further arranges the electrode sheet in transit to avoid slight deviation in transit. Until the electrode sheet is removed from the transmission platform and enters the next process, the electrode sheet is affected by the round wheel in the combing rod on both sides. The round wheel rotates with the movement of the electrode sheet, thereby limiting the position of the electrode sheet on both sides through rotation.

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