Electrode sheet manufacturing apparatus and electrode sheet manufacturing method

Abstract

The application relates to the technical field of battery manufacturing equipment, in particular to an electrode sheet manufacturing device and an electrode sheet manufacturing method. A coating mechanism is provided with a coating space for the base tape to pass through, and is used for coating slurry on the base tape, so that a coated section and an uncoated section are formed on the base tape. A thickness measuring mechanism is provided with a thickness measuring space for the base tape to pass through, and is used for measuring the thickness of the coated section. A first punching mechanism is used for punching out a coated sheet and a blank sheet on the base tape. A rolling mechanism is used for rolling the coated section. A weighing mechanism is used for weighing the weight of the coated sheet and the blank sheet. The thickness measuring mechanism is used for measuring the thickness of the rolled coated section. In the application, the rolling mechanism can automatically adjust the rolling force in real time according to the measured thickness of the coated section until the thickness of the rolled coated section meets the requirements, so that the quality of the coated section is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing equipment technology, and in particular to an electrode sheet manufacturing equipment and a method for manufacturing electrode sheets. Background Technology

[0002] Button batteries, also known as coin cells, are batteries shaped like small buttons, with a relatively large diameter and thin profile. With the continuous development of automation technology, more and more manufacturers are using automated assembly machines to assemble button batteries. A button battery consists of components such as a positive electrode casing, a negative electrode casing, a positive electrode sheet, a separator, a lithium electrode, a flat pad, and a spring. Before assembling a button battery, the positive and negative electrode sheets need to be prepared; these are typically cut into round pieces from the electrode strip using a punching mechanism.

[0003] The electrode strip is formed by coating a base strip with a slurry using a coating machine. In the existing technology, the coating machine can only coat an electrode strip of a certain thickness according to a pre-programmed procedure. When the thickness of the electrode strip is not up to standard, the coating thickness of the coating machine needs to be manually adjusted, which has technical problems such as low automation and inconvenient adjustment. Summary of the Invention

[0004] This invention provides an electrode sheet manufacturing device and an electrode sheet manufacturing method to solve the technical problems in the prior art, such as the need for manual adjustment of the coating machine to adjust the electrode sheet thickness.

[0005] An embodiment of the present invention provides an electrode sheet manufacturing device, including a support base and a coating mechanism, a first punching mechanism, a first transfer mechanism, a rolling mechanism, a weighing mechanism, a thickness measuring mechanism, a second punching mechanism, an unwinding joint, and a winding joint, all mounted on the support base.

[0006] The coating mechanism is provided with a coating space through which the base belt passes, and is used to coat the slurry onto the base belt, so that coated sections and uncoated sections are formed on the base belt.

[0007] The thickness measuring mechanism is provided with a thickness measuring space for the base strip to pass through, for measuring the thickness of the coating section;

[0008] The first punching mechanism includes a punching drive, a punching seat with a punching protrusion, and a punching top block with a punching through hole. The punching seat is installed at the output end of the punching drive, and a punching space is provided between the punching seat and the punching top block for the baseband to pass through. The punching protrusion enters and exits the punching through hole to punch out coated sheets in the coating section and blank sheets in the uncoated section.

[0009] The rolling mechanism includes a rolling base, a rolling lifting drive, a rolling rotation drive, a first gear, a second gear, a first pressure roller, and a second pressure roller. The rolling base is installed at the output end of the rolling lifting drive, the rolling rotation drive is installed on the rolling base, the first gear is installed at the output end of the rolling rotation drive, and the second gear is rotatably installed on the support base and meshes with the first gear. The first pressure roller is installed on the first gear, the second pressure roller is installed on the second gear, and a rolling space is provided between the first pressure roller and the second pressure roller.

[0010] The first transfer mechanism is used to transfer the coated sheet and the blank sheet in the punched through hole to the weighing mechanism, and the weighing mechanism is used to weigh the coated sheet and the blank sheet.

[0011] The second punching mechanism is provided with a through hole for the baseband to pass through, for punching out the target electrode sheet on the coating section;

[0012] The base tape released from the unwinding joint passes sequentially through the coating space, the punching space, the thickness measuring space, the rolling space, the thickness measuring space, and the through hole before being wound onto the winding joint.

[0013] Optionally, the electrode fabrication equipment further includes a liquid transfer mechanism, a feeding mechanism, and a capping mechanism, all mounted on the support base;

[0014] The pipetting mechanism includes a clamping assembly, a pipetting assembly, and a moving drive mounted on the support base; the clamping assembly includes a first clamping drive, a first gripper, and a first support plate mounted on the moving drive, the first clamping drive being mounted on the moving drive, and the first gripper being located at the output end of the first clamping drive; the pipetting assembly includes a dropper drive, a dropper, and a second support plate mounted on the moving drive, the dropper drive being mounted on the second support plate, and the dropper being located at the output end of the dropper drive;

[0015] The feeding mechanism is used to store the liquid storage container containing the slurry;

[0016] The clamping assembly is used to transfer the liquid storage container between the feeding mechanism and the capping mechanism;

[0017] The screw-on mechanism is used to open or close the liquid storage container;

[0018] The pipetting assembly is used to transfer the slurry in the storage container to the coating mechanism via the dropper.

[0019] Optionally, the pipetting assembly further includes a second clamping drive and a second gripper, the second clamping drive being mounted on the second support plate and the second gripper being mounted on the output end of the second clamping drive;

[0020] The coating mechanism includes a coating seat and a film-forming device detachably mounted on the coating seat, and the coating space is disposed between the coating seat and the film-forming device;

[0021] The electrode sheet fabrication equipment also includes a cleaning mechanism for cleaning the film forming device;

[0022] The pipetting mechanism is also used to transfer the film-forming device between the coating seat and the cleaning mechanism via the second gripper.

[0023] Optionally, the cleaning mechanism includes an unwinding roller, a take-up roller, a first guide roller, a second guide roller, a cleaning seat, a cleaning clamping assembly, and a cleaning rotating assembly;

[0024] The unwinding roller, the winding roller, the cleaning seat, and the cleaning rotating assembly are all mounted on the support base;

[0025] The first guide roller, the cleaning clamping assembly, and the second guide roller are sequentially and spaced apart on the cleaning seat. The cleaning clamping assembly is provided with a support groove for accommodating the film maker. The output end of the cleaning rotation assembly is connected to the cleaning clamping assembly.

[0026] The cleaning tape released by the unwinding roller passes around the first guide roller, through the support groove, and around the second guide roller before winding onto the take-up roller;

[0027] The cleaning rotation assembly is used for the reciprocating rotation of the cleaning clamping assembly, causing the film former and the cleaning belt to move relative to each other.

[0028] Optionally, the cleaning clamping assembly includes a first side block, a second side block, an opening and closing drive member, a clamping base plate, and a clamping top block; the clamping top block has a first inclined surface and a second inclined surface on opposite sides, the supporting groove is disposed on the clamping top block, and the clamping top block is slidably mounted on the clamping base plate; the opening and closing drive member is mounted on the base plate;

[0029] The first side block is provided with a first positioning pin and a first roller, and the second side block is provided with a second positioning pin and a second roller;

[0030] The first side block and the second side block are respectively installed on the two opposite output ends of the opening and closing drive member, the first roller abuts against the first inclined surface, and the second roller abuts against the second inclined surface;

[0031] When the opening and closing drive causes the first side block and the second side block to move closer to each other, the first positioning pin and the second positioning pin clamp the film-making device from opposite ends, and the first roller and the second roller drive the clamping top block to move upward so that the cleaning belt fits the film-making device.

[0032] When the opening and closing drive causes the first side block and the second side block to move away from each other, the first roller and the second roller cause the clamping top block to move down, so that the cleaning belt moves away from the film forming device.

[0033] Optionally, the feeding mechanism is equipped with multiple liquid storage containers, which can store different slurries, and each liquid storage container is labeled.

[0034] The electrode sheet manufacturing equipment also includes a barcode scanner and an inkjet printer, both mounted on the support base;

[0035] The clamping assembly is also used to move the liquid storage container to the barcode scanner so that the barcode scanner can scan the label on the liquid storage container;

[0036] The coating mechanism is used to coat multiple coated segments spaced apart on the baseband, with an uncoated segment between two adjacent coated segments;

[0037] The inkjet printer is used to print identification codes on the coating section, and the identification codes correspond one-to-one with the labels.

[0038] Optionally, the electrode sheet fabrication equipment further includes an oven mounted on the support base, the oven having a baking space;

[0039] The base tape released from the unwinding joint passes sequentially through the coating space, the baking space, the punching space, the thickness measuring space, the rolling space, and the thickness measuring space before winding onto the take-up joint;

[0040] The inkjet printer is used to print codes on the coating section between the baking space and the punching space.

[0041] Optionally, the thickness measuring mechanism includes a thickness measuring base, a thickness measuring sensor, a thickness measuring lifting drive, and a pressure head installed at the output end of the thickness measuring lifting drive. The thickness measuring lifting drive and the thickness measuring sensor are both installed on the thickness measuring base, and the thickness measuring base is installed on the support base.

[0042] The thickness measuring lifting drive is used to drive the pressure head to press the coating section onto the thickness measuring base, and the thickness measuring sensor is used to measure the thickness of the coating section located on the base.

[0043] Optionally, the electrode sheet fabrication equipment further includes a feeding tray and a second transfer mechanism mounted on the support base;

[0044] The second transfer mechanism is used to transfer the target electrode sheet punched out by the second punching mechanism to the unloading tray.

[0045] An embodiment of the present invention also provides a method for manufacturing an electrode sheet, applied to the aforementioned electrode sheet manufacturing equipment, comprising:

[0046] Control the unwinding joint to release the base tape, and control the winding joint to wind up the base tape, so that the base tape released by the unwinding joint passes through the coating space, punching space, thickness measuring space, rolling space and thickness measuring space in sequence and then wraps around the winding joint.

[0047] The coating mechanism is controlled to apply slurry onto the base belt, so that coated sections and uncoated sections are formed on the base belt;

[0048] The first punching mechanism is controlled to cut coated sheets in the coating section and to punch blank sheets in the uncoated section;

[0049] The first transfer mechanism is controlled to transfer the coated sheet and blank sheet on the first punching mechanism to the weighing mechanism, and the weighing mechanism is controlled to weigh the coated sheet and the blank sheet respectively to obtain the first weight of the coated sheet and the second weight of the blank sheet.

[0050] The roller pressing mechanism is controlled to press the coating section;

[0051] The thickness measuring mechanism is controlled to measure the actual thickness of the coated section after roller pressing.

[0052] The target thickness of the coated section after roll pressing is determined based on the first weight, the second weight, the area of ​​the blank sheet or coated sheet, the thickness of the uncoated section, and the target compaction density of the coated section.

[0053] The roller gap of the roller pressing space is adjusted in real time according to the target thickness so that the actual thickness of the coated sheet is adjusted to be within the target range as the difference between the actual thickness and the target thickness is within the target range, so as to obtain the completed target coated section.

[0054] The second punching mechanism is controlled to punch out the target electrode sheet in the target coating section.

[0055] In this invention, the base strip released by the unwinding roller sequentially passes through the coating space, the punching space, the thickness measuring space, the rolling space, and the thickness measuring space before winding onto the take-up roller; the coating mechanism can coat the slurry onto the base strip, so that the base strip forms coated sections and uncoated sections spaced apart; the first punching mechanism can punch out coated sheets in the coated sections and blank sheets in the uncoated sections; the rolling mechanism can compact the coated sections; the first transfer mechanism picks up the blank sheets and the coated sheets from the punching holes of the first punching mechanism and transfers them to the weighing mechanism, which can obtain the weight G1 of the coated sheets and the weight G2 of the blank sheets. Since the areas of the coated sheet and the blank sheet are equal and both S, the areal density ρ1 of the coated section can be calculated, ρ1 = (G2 - G1) / S; the thickness measuring mechanism can measure the thickness d2 of the coated section after rolling, and since the thickness of the uncoated section is d3 (known), the compaction density ρ = ρ1 / (d2 - d3), and the compaction density is the target quantity, thus the target thickness of the coated section after rolling can be calculated. The actual thickness d1 of the coating section is compared with the target thickness d2. The distance between the first and second pressure rollers is adjusted by the roller pressing and lifting drive until the difference between the actual thickness d1 and the target thickness d2 is within the target range. In this invention, the electrode sheet manufacturing equipment can automatically adjust the pressing force of the roller pressing mechanism on the coating section, enabling the electrode sheet manufacturing equipment to produce coating sections of higher quality. Furthermore, the electrode sheet manufacturing equipment has a high degree of automation and high efficiency. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of an electrode sheet fabrication device provided in an embodiment of the present invention;

[0058] Figure 2 This is a partial structural schematic diagram of an electrode sheet fabrication device provided in an embodiment of the present invention;

[0059] Figure 3 This is a schematic diagram of the coating mechanism provided in an embodiment of the present invention;

[0060] Figure 4 This is a schematic diagram of the structure of the first punching mechanism, the first transfer mechanism, and the rolling mechanism provided in an embodiment of the present invention;

[0061] Figure 5 This is a partial structural schematic diagram of the first punching mechanism provided in an embodiment of the present invention;

[0062] Figure 6 This is a partial structural schematic diagram of a roller pressing mechanism provided in an embodiment of the present invention;

[0063] Figure 7 This is a schematic diagram of the thickness measuring mechanism provided in an embodiment of the present invention;

[0064] Figure 8 This is a schematic diagram of the cleaning mechanism provided in an embodiment of the present invention;

[0065] Figure 9 This is a schematic diagram of the structure of a cleaning clamping assembly provided in an embodiment of the present invention;

[0066] Figure 10 This is a schematic diagram of a baseband, coated sheet, and blank sheet provided in an embodiment of the present invention.

[0067] The reference numerals in the accompanying drawings are as follows:

[0068] 10. Support base; 101. Weighing mechanism; 102. Unwinding joint; 103. Rewinding joint; 104. Capping mechanism; 105. Feeding mechanism; 106. Liquid storage container; 107. Barcode scanner; 108. Drying oven;

[0069] 1. Coating mechanism; 11. Coating seat; 12. Film forming device; 2. First punching mechanism; 21. Punching drive; 22. Punching seat; 23. Punching top block; 231. Punching through hole; 3. First transfer mechanism; 4. Rolling mechanism; 41. Rolling seat; 42. Rolling rotation drive; 43. First gear; 44. Second gear; 45. First pressure roller; 46. Second pressure roller; 6. Thickness measuring mechanism; 61. Thickness measuring base; 62. Thickness sensor; 63. Thickness measuring lifting drive; 64. Pressure head; 7. Pipetting mechanism; 71. Clamping assembly; 711. First gripper; 72. Pipetting assembly; 721. Dropper; 73. Moving... 8. Driving component; 9. Cleaning mechanism; 81. Unwinding roller; 82. Rewinding roller; 83. First guide roller; 84. Second guide roller; 85. Cleaning seat; 86. Cleaning clamping assembly; 861. Support groove; 862. First side block; 8621. First positioning pin; 8622. First roller; 863. Second side block; 8631. Second positioning pin; 8632. Second roller; 864. Opening and closing driving component; 865. Clamping base plate; 866. Clamping top block; 8661. First inclined surface; 8662. Second inclined surface; 87. Cleaning rotating assembly; 91. Unloading tray; 92. Second punching mechanism; 93. Second transfer mechanism;

[0070] 20. Baseband; 201. Coated section; 202. Uncoated section; 203. Coated sheet; 204. Blank sheet. Detailed Implementation

[0071] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0072] like Figure 1 As shown, an embodiment of the present invention provides an electrode sheet manufacturing device, including a support base 10 and a coating mechanism 1, a first punching mechanism 2, a first transfer mechanism 3, a rolling mechanism 4, a weighing mechanism 101, a thickness measuring mechanism 6, a second punching mechanism 92, an unwinding joint 102, and a winding joint 103, all mounted on the support base 10.

[0073] The coating mechanism 1 is provided with a coating space through which the base belt 20 passes, and is used to coat the slurry onto the base belt 20, so that coated sections 201 and uncoated sections 202 are formed on the base belt 20.

[0074] The thickness measuring mechanism 6 is provided with a thickness measuring space through which the base tape 20 passes, for measuring the thickness of the coating section 201;

[0075] like Figure 5 As shown, the first punching mechanism 2 includes a punching drive 21, a punching seat 22 with a punching protrusion, and a punching top block 23 with a punching through hole 231. The punching seat 22 is installed at the output end of the punching drive 21. A punching space is provided between the punching seat 22 and the punching top block 23 for the baseband 20 to pass through. The punching protrusion enters and exits the punching through hole 231 to punch out coated sheets 203 in the coating section 201 and to punch out blank sheets 204 in the uncoated section 202.

[0076] like Figure 6 As shown, the roller pressing mechanism 4 includes a roller pressing seat 41, a roller pressing lifting drive (not shown in the figure), a roller pressing rotation drive 42, a first gear 43, a second gear 44, a first pressure roller 45, and a second pressure roller 46. The roller pressing seat 41 is installed on the output end of the roller pressing lifting drive, the roller pressing rotation drive 42 is installed on the roller pressing seat 41, the first gear 43 is installed on the output end of the roller pressing rotation drive 42, and the second gear 44 is rotatably installed on the support seat 10 and meshes with the first gear 43. The first pressure roller 45 is installed on the first gear 43, the second pressure roller 46 is installed on the second gear 44, and a roller pressing space is provided between the first pressure roller 45 and the second pressure roller 46.

[0077] The first transfer mechanism 3 is used to transfer the coated sheet 203 and the blank sheet 204 in the punched through hole 231 to the weighing mechanism 101, and the weighing mechanism 101 is used to weigh the weight of the coated sheet 203 and the blank sheet 204.

[0078] The second punching mechanism 92 is provided with a through hole for the baseband 20 to pass through, for punching out the target electrode sheet on the coating section 201;

[0079] like Figure 1 As shown, the base tape 20 released by the unwinding joint 102 sequentially passes through the coating space, the punching space, the thickness measuring space, the rolling space, the thickness measuring space and the through hole, and then wraps around the winding joint 103.

[0080] Both the unwinding joint 102 and the winding joint 103 are powered, and the baseband 20 is aluminum foil.

[0081] In the first punching mechanism 2, the punching drive 21 includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, a lead screw and nut assembly, etc. The punching drive 21 can drive the punching seat 22 to move toward or away from the punching top block 23, so that the punching protrusion can be inserted into or withdrawn from the punching through hole 231. Since the base strip 20 passes through the punching space, the punching protrusion can punch out coated sheet 203 and blank sheet 204 on the base strip 20, and the areas of the coated sheet 203 and the blank sheet 204 are equal.

[0082] In the roller pressing mechanism 4, the roller pressing lifting drive includes, but is not limited to, pneumatic cylinders, hydraulic cylinders, lead screw and nut assemblies, etc., and the roller pressing rotation drive 42 includes, but is not limited to, motors, etc.; the roller pressing lifting drive can drive the first gear 43 to move away from or towards the second gear 44, thereby adjusting the distance between the first pressure roller 45 and the second pressure roller 46 (that is, adjusting the gap of the roller pressing space; that is, adjusting the rolling pressure between the first pressure roller 45 and the second pressure roller 46); it should be noted that the distance the first gear 43 moves up and down is very small, so that the first gear 43 and the second gear 44 always remain in a meshed state.

[0083] The structure and principle of the second punching mechanism 92 are the same as those of the first punching mechanism, so the second punching mechanism 92 will not be described in detail here; the second punching mechanism 92 punches out the target electrode sheet in the coating section 201 that meets the requirements.

[0084] In this invention, the base strip 20 released by the unwinding roller 81 sequentially passes through the coating space, the punching space, the thickness measuring space, the rolling space, the thickness measuring space, and the through hole before winding onto the take-up roller 82; the coating mechanism 1 can coat the slurry onto the base strip 20, so that the base strip 20 forms coated sections 201 and uncoated sections 202 spaced apart; the first punching mechanism 2 can punch out coated sheets 203 from the coated sections 201 and blank sheets 204 from the uncoated sections 202; the rolling mechanism 4 can compact the coated sections 201; the first transfer mechanism 3 picks up the blank sheet 204 and the coated sheet 203 from the punching hole of the first punching mechanism 2 and transfers them to the weighing mechanism 101, the weighing mechanism 101 can obtain the first weight G1 of the coated sheet 203 and the second weight G2 of the blank sheet 204. Since the areas of the coated sheet 203 and the blank sheet 204 are equal and both S, the areal density ρ1 of the coated section 201 can be calculated, ρ1 = (G2 - G1) / S; the thickness measuring mechanism 6 can measure the thickness d2 of the coated section 201 after rolling, and since the thickness of the uncoated section 202 is d3 (known), the compaction density ρ of the coated section is ρ1 / (d2 - d3). The compaction density is the target amount, thus the target thickness of the coated section 201 after rolling can be calculated. The actual thickness d1 of the coating section 201 is compared with the target thickness d2. The distance between the first pressure roller 45 and the second pressure roller 46 is adjusted by the roller pressing lifting drive (that is, the roller pressure between the first pressure roller 45 and the second pressure roller 46) until the difference between the actual thickness d1 and the target thickness d2 is within the target range. The second punching mechanism 92 punches out the target electrode sheet from the coating section 201 that meets the requirements. In this invention, the electrode sheet manufacturing equipment can automatically adjust the pressing force of the roller pressing mechanism 4 on the coating section 201, so that the electrode sheet manufacturing equipment can produce coating sections 201 of higher quality. Furthermore, the electrode sheet manufacturing equipment can complete the coating, rolling, and punching operations, with a high degree of automation and high efficiency.

[0085] In one embodiment, such as Figure 1 and Figure 2 As shown, the electrode sheet fabrication equipment also includes a liquid transfer mechanism 7, a feeding mechanism 105, and a capping mechanism 104, all of which are mounted on the support base 10.

[0086] The pipetting mechanism 7 includes a clamping assembly 71, a pipetting assembly 72, and a moving drive 73 mounted on the support base 10. The clamping assembly 71 includes a first clamping drive (not shown in the figure), a first gripper 711, and a first support plate (not shown in the figure) mounted on the moving drive 73. The first clamping drive is mounted on the moving drive 73, and the first gripper 711 is located at the output end of the first clamping drive. The pipetting assembly 72 includes a dropper drive (not shown in the figure), a dropper 721, and a second support plate (not shown in the figure) mounted on the moving drive 73. The dropper drive is mounted on the second support plate, and the dropper 721 is located at the output end of the dropper drive.

[0087] The feeding mechanism 105 is used to store the liquid storage container 106 containing the slurry;

[0088] The clamping assembly 71 is used to transfer the liquid storage container 106 between the feeding mechanism 105 and the capping mechanism 104;

[0089] The screw-on mechanism 104 is used to open or close the liquid storage container 106;

[0090] The pipetting assembly 72 is used to transfer the slurry in the storage container 106 to the coating mechanism 1 through the dropper 721.

[0091] The moving drive component 73 includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, and a lead screw and nut assembly. The moving drive component 73 can drive the clamping assembly 71 to move between the feeding mechanism 105 and the capping mechanism 104, and can also drive the liquid transfer assembly 72 to move between the capping mechanism 104 and the coating mechanism 1. The first clamping drive component can drive the first gripper 711 to open and close, so that the first gripper 711 clamps or releases the liquid storage container 106. The dripping drive component includes, but is not limited to, a pump body, and can drive the drip tube 721 to draw in or extrude the slurry.

[0092] Specifically, the clamping assembly 71 clamps the liquid storage container 106 from the feeding mechanism 105 and places the liquid storage container 106 on the capping mechanism 104. The clamping assembly 71 and the capping mechanism 104 cooperate to open the liquid storage container 106. The transfer assembly 72 draws slurry from the liquid storage container 106 and extrudes it onto the coating mechanism 1. The coating mechanism 1 can coat the slurry onto the base belt 20, so that the base belt 20 has spaced coated sections 201 and uncoated sections 202. The clamping assembly 71 can also transfer the liquid storage container 106 in the capping mechanism 104 to the feeding mechanism 105.

[0093] In this embodiment, the feeding mechanism 105 can provide a liquid storage container 106 storing different slurries, and the coating mechanism 1 can coat different slurries onto the base strip 20, so that different coating segments 201 of different slurries can be formed on the base strip 20, and the different coating segments 201 are distributed at intervals, which improves the applicability, versatility and automation of the electrode sheet manufacturing equipment.

[0094] In one embodiment, such as Figure 2 As shown, the pipetting assembly 72 further includes a second clamping drive (not shown) and a second gripper (not shown). The second clamping drive is mounted on the second support plate, and the second gripper is mounted on the output end of the second clamping drive.

[0095] The coating mechanism 1 includes a coating seat 11 and a film forming device 12 detachably mounted on the coating seat 11, and the coating space is disposed between the coating seat 11 and the film forming device 12;

[0096] The electrode sheet fabrication equipment also includes a cleaning mechanism 8, which is used to clean the film forming device 12.

[0097] The pipetting mechanism 7 is also used to transfer the film-forming device 12 between the coating seat 11 and the cleaning mechanism 8 via the second gripper.

[0098] The second clamping drive includes, but is not limited to, a clamping cylinder, etc. The second clamping drive can drive the second gripper to open and close, so that the second gripper can clamp or release the film former 12; the moving drive 73 can also drive the pipetting assembly 72 to move between the coating seat 11 and the cleaning mechanism 8.

[0099] Specifically, after the film-forming device 12 completes the coating of one slurry, the second gripper clamps the film-forming device 12 from the coating seat 11 and transfers it to the cleaning mechanism 8. The cleaning mechanism 8 can clean the film-forming device 12. After the film-forming device 12 is cleaned, the second gripper clamps the film-forming device 12 from the cleaning mechanism and transfers it to the coating seat 11. The coating mechanism 1 can then coat another slurry onto the base belt 20.

[0100] In this embodiment, the cleaning mechanism 8 can clean the film-forming device 12, avoiding cross-contamination of different slurries and improving the coating quality.

[0101] In one embodiment, such as Figure 2 , Figure 8 as well as Figure 9As shown, the cleaning mechanism 8 includes an unwinding roller 81, a take-up roller 82, a first guide roller 83, a second guide roller 84, a cleaning seat 85, a cleaning clamping assembly 86, and a cleaning rotating assembly 87.

[0102] The unwinding roller 81, the winding roller 82, the cleaning seat 85, and the cleaning rotating assembly 87 are all mounted on the support base 10;

[0103] The first guide roller 83, the cleaning clamping assembly 86, and the second guide roller 84 are sequentially and spaced apart on the cleaning seat 85. The cleaning clamping assembly 86 is provided with a support groove 861 for accommodating the film former 12. The output end of the cleaning rotation assembly 87 is connected to the cleaning clamping assembly 86.

[0104] The cleaning tape released by the unwinding roller 81 passes around the first guide roller 83, through the support groove 861, and around the second guide roller 84 before winding onto the take-up roller 82.

[0105] The cleaning rotation assembly 87 is used for the reciprocating rotation of the cleaning clamping assembly 86, so that the film former 12 and the cleaning belt move relative to each other.

[0106] The unwinding roller 81 and the winding roller 82 are both powered rollers, and the cleaning rotating assembly 87 includes, but is not limited to, a motor and a belt assembly.

[0107] Specifically, the first guide roller 83 and the second guide roller 84 are located on the left and right sides of the support groove 861, respectively. The first guide roller 83 and the second guide roller 84 can guide the cleaning belt to the support groove 861. After the second gripper transfers the film former 12 to the support groove 861, the cleaning belt adheres to the film former 12. The cleaning rotation assembly 87 drives the cleaning clamping assembly 86 and the film former 12 to swing back and forth, so that the cleaning belt can wipe the film former 12 and ensure the cleanliness of the film former 12 after wiping.

[0108] In one embodiment, such as Figure 9 As shown, the cleaning clamping assembly 86 includes a first side block 862, a second side block 863, an opening and closing drive member 864, a clamping base plate 865, and a clamping top block 866. The clamping top block 866 has a first inclined surface 8661 and a second inclined surface 8662 on opposite sides. A support groove 861 is disposed on the clamping top block 866, and the clamping top block 866 is slidably mounted on the clamping base plate 865. The opening and closing drive member 864 is mounted on the side of the clamping base plate 865 opposite to the clamping top block 866. The output end of the cleaning rotation assembly 87 is connected to the first side block 862.

[0109] The first side block 862 is provided with a first positioning pin 8621 and a first roller 8622, and the second side block 863 is provided with a second positioning pin 8631 and a second roller 8632.

[0110] The first side block 862 and the second side block 863 are respectively installed on the two opposite output ends of the opening and closing drive member 864. The first roller 8622 abuts against the first inclined surface 8661, and the second roller 8632 abuts against the second inclined surface 8662.

[0111] When the opening and closing drive 864 drives the first side block 862 and the second side block 863 to move closer to each other, the first positioning pin 8621 and the second positioning pin 8631 clamp the film forming device 12 from opposite ends, and the first roller 8622 and the second roller 8632 drive the clamping top block 866 to move upward so that the cleaning belt fits the film forming device 12.

[0112] When the opening and closing drive member 864 drives the first side block 862 and the second side block 863 to move away from each other, and the first roller 8622 and the second roller 8632 drive the clamping top block 866 to move down, so that the cleaning belt moves away from the film forming device 12.

[0113] Specifically, the second gripper places the film-forming device 12 between the first side block 862 and the second side block 863. The opening and closing drive member 864 drives the first side block 862 and the second side block 863 to move closer to each other until the first positioning pin 8621 and the second positioning pin 8631 clamp the film-forming device 12. The first roller 8622 drives the clamping top block 866 to move upward through the first inclined surface 8661, and the second roller 8632 drives the clamping top block 866 to move upward through the second inclined surface 8662 until the cleaning belt abuts against the film-forming device 12. The cleaning rotation assembly 87 drives the cleaning clamping assembly 86 and the film-forming device 12 to swing back and forth, so that the cleaning belt can wipe the film-forming device 12. After the film-forming device 12 is wiped clean by the cleaning belt, the opening and closing drive 864 drives the first side block 862 and the second side block 863 to move away from each other, the first positioning pin 8621 and the second positioning pin 8631 release the film-forming device 12, and the clamping top block 866 moves down, and the cleaning belt moves away from the film-forming device 12.

[0114] In this embodiment, the cleaning mechanism 8 has a compact structure and occupies little space.

[0115] In one embodiment, such as Figure 1 and Figure 2As shown, the feeding mechanism 105 has multiple liquid storage containers 106, which can store different slurries. Each liquid storage container 106 is labeled (not shown in the figure).

[0116] The electrode sheet manufacturing equipment also includes a barcode scanner 107 and an inkjet printer (not shown in the figure) both mounted on the support base 10.

[0117] The clamping assembly 71 is also used to move the liquid storage container 106 to the barcode scanner 107 so that the barcode scanner 107 can scan the label on the liquid storage container 106.

[0118] The coating mechanism 1 is used to coat multiple coated segments 201 spaced apart on the baseband 20, with an uncoated segment 202 between two adjacent coated segments 201.

[0119] The inkjet printer is used to print an identification code (not shown in the figure) on the coating section 201, and the identification code corresponds one-to-one with the label.

[0120] The labels and identification codes include, but are not limited to, QR codes and barcodes.

[0121] Specifically, before the first gripper 711 transfers the liquid storage container 106 on the feeding mechanism 105 to the capping mechanism 104, it needs to move the liquid storage container 106 above the barcode scanner 107. The barcode scanner 107 can scan and record the label on the liquid storage container 106. After each coating mechanism 1 coats the slurry in the liquid storage container 106 onto the baseband 20, the inkjet printer needs to print an identification code on the coating section 201. The identification code corresponds to the label and can record information such as the type of slurry, thus avoiding the accident of confusion between multiple coating sections 201 on the baseband 20.

[0122] In one embodiment, such as Figure 1 As shown, the electrode sheet manufacturing equipment also includes an oven 108 mounted on the support base 10, and the oven 108 is provided with a baking space;

[0123] The base tape 20 released by the unwinding joint 102 passes sequentially through the coating space, the baking space, the punching space, the thickness measuring space, the rolling space, and the thickness measuring space before being wound onto the winding joint 103.

[0124] The inkjet printer is used to print codes on the coating section 201 between the baking space and the punching space.

[0125] The inkjet printer is located at the rear of the oven 108.

[0126] Specifically, after the coating section 201 is baked in the oven 108, the adhesive will adhere to the base tape 20, so that the inkjet printer will print the identification code on the dried coating section 201, ensuring the quality and clarity of the identification code.

[0127] In one embodiment, such as Figure 7 As shown, the thickness measuring mechanism 6 includes a thickness measuring base 61, a thickness measuring sensor 62, a thickness measuring lifting drive 63, and a pressure head 64 installed at the output end of the thickness measuring lifting drive 63. The thickness measuring lifting drive 63 and the thickness measuring sensor 62 are both installed on the thickness measuring base 61, and the thickness measuring base 61 is installed on the support base 10.

[0128] The thickness measuring lifting drive 63 is used to drive the pressure head 64 to press the coating section 201 onto the thickness measuring base 61, and the thickness measuring sensor 62 is used to measure the thickness of the coating section 201 located on the base.

[0129] The thickness measuring lifting drive 63 includes, but is not limited to, pneumatic cylinders, hydraulic cylinders, and linear motors, and the pressure head 64 and the thickness measuring sensor 62 are both located above the thickness measuring base 61.

[0130] Specifically, the thickness sensor 62 is equipped with a telescopic rod. When the telescopic rod abuts against the thickness measuring base 61, the distance between the thickness sensor 62 and the base can be measured. After the thickness measuring lifting drive 63 drives the pressure head 64 to press the coating section 201 tightly and adhere it to the thickness measuring base 61, the telescopic rod of the thickness sensor 62 moves down and abuts against the coating section 201, thereby measuring the distance between the coating section 201 and the thickness sensor 62. The thickness of the coating section 201 can be obtained by subtracting the distance between the thickness sensor 62 and the base from the distance between the coating section 201 and the thickness sensor 62. In this embodiment, the thickness measuring mechanism 6 has high measurement accuracy.

[0131] In one embodiment, such as Figure 1 As shown, the electrode sheet manufacturing equipment also includes a feeding tray 91 and a second transfer mechanism 93 mounted on the support base 10;

[0132] The second transfer mechanism 93 is used to transfer the target electrode sheet punched out by the second punching mechanism 92 to the unloading tray 91.

[0133] The second punching mechanism 92 is located behind the thickness measuring mechanism 6.

[0134] Specifically, when the coating section 201 that meets the requirements is transferred to the through hole of the second punching mechanism 92, the second punching mechanism 92 can punch out multiple target electrode sheets on the coating section 201 that meets the requirements, and the second transfer mechanism 93 can pick up the target electrode sheets from the second punching mechanism 92 and transfer them to the unloading tray 91.

[0135] In this embodiment, the electrode sheet manufacturing equipment can produce the target electrode sheet, which can be used to prepare materials for the manufacture of button batteries, thus improving the applicability and versatility of the electrode sheet manufacturing equipment.

[0136] Another embodiment of the present invention provides a method for manufacturing an electrode sheet, applied to the above-mentioned electrode sheet manufacturing equipment, comprising:

[0137] S100, control the unwinding joint 102 to release the base tape 20, and control the winding joint 103 to wind up the base tape 20 so that the base tape 20 released by the unwinding joint 102 passes through the coating space, punching space, thickness measuring space, rolling space and thickness measuring space in sequence and then wraps around the winding joint 103.

[0138] S200: Control the coating mechanism 1 to coat the slurry onto the base belt 20 so that coated sections 201 and uncoated sections 202 are formed on the base belt 20.

[0139] S300, control the first punching mechanism 2 to cut out coated sheet 203 in the coating section 201 and punch out blank sheet 204 in the uncoated section 202;

[0140] S400: Control the first transfer mechanism 3 to transfer the coated sheet 203 and blank sheet 204 on the first punching mechanism 2 to the weighing mechanism 101, and control the weighing mechanism 101 to weigh the coated sheet 203 and the blank sheet 204 respectively to obtain the first weight G1 of the coated sheet 203 and the second weight G2 of the blank sheet 204.

[0141] S500, Control the roller pressing mechanism 4 to press the coating section 201;

[0142] S600: Control the thickness measuring mechanism 6 to measure the actual thickness d1 of the coating section 201 after roller pressing;

[0143] S700. Determine the target thickness d2 of the coated section 201 after roll pressing based on the first weight G1, the second weight G2, the area S of the blank sheet 204 or the coated sheet 203, the thickness d3 of the uncoated section 202, and the target compaction density ρ of the coated section 201.

[0144] S800. Adjust the roller gap of the roller space in real time according to the target thickness so that the actual thickness of the coated sheet 203 is adjusted to be within the target range as the difference between the actual thickness and the target thickness is within the target range, and the completed target coated section is obtained.

[0145] S900, control the second punching mechanism 92 to punch out the target electrode sheet in the target coating section.

[0146] In step S100, the unwinding motor can drive the unwinding connector 102 to rotate to release the base tape 20, and the winding motor can drive the winding connector 103 to rotate to wind up the base tape 20, and the winding connector 103 winds up the already punched waste base tape 20.

[0147] In step S200, the coating mechanism 1 can sequentially coat different slurries onto the base belt 20, so that multiple coating segments 201 are formed on the base belt 20 with intervals, and there is a coating segment 201 between two adjacent coating segments 201, and the slurry on each coating segment 201 can be different.

[0148] In step S300, the punching drive 21 can drive the punching seat 22 to move toward or away from the punching top block 23, so that the punching protrusion can be inserted into or withdrawn from the punching through hole 231. Since the base strip 20 passes through the punching space, the punching protrusion can punch out coated sheet 203 and blank sheet 204 on the base strip 20, and the areas of coated sheet 203 and blank sheet 204 are equal.

[0149] In step S500, the roller pressing rotation drive 42 adjusts the first pressure roller 45 to rotate through the first gear 43, and the first gear 43 drives the second pressure roller 46 to rotate through the second gear 44 meshing with it. The base belt 20 passes through the rolling space between the first pressure roller 45 and the second pressure roller 46, so that the first pressure roller 45 and the second pressure roller 46 can roll the coating section 201.

[0150] In step S700, the area of ​​the blank sheet 204 and the area of ​​the coated sheet 203 are both equal to S, and S is a known quantity. Based on the first weight G1 of the coated sheet 203, the second weight G3 of the blank sheet 204, and the area S of the coated sheet 203, the areal density ρ1 of the coated section 201 can be calculated: ρ1 = (G2 - G1) / S. Based on the areal density ρ1 of the coated section 201 and the thickness d3 of the uncoated section 202 (a known quantity), the compaction density ρ of the coated section 201 can be calculated: ρ = ρ1 / (d2 - d3), where d2 is the target thickness of the coated section 201 after rolling, and the compaction density ρ is a target value (a known quantity). Based on the areal density ρ1 and the compaction density ρ, the target thickness can be obtained. .

[0151] In step S800, when the actual thickness d1 of the coating section 201 is greater than the target thickness d2 of the coating section 201, it indicates that the compaction density of the coating section 201 is insufficient, and it is necessary to increase the roller pressure between the first pressure roller 45 and the second pressure roller 46 to reduce the actual thickness d1 of the coating section 201; when the actual thickness d1 of the coating section 201 is less than the target thickness d2 of the coating section 201, it indicates that the compaction density of the coating section 201 is too high, and it is necessary to reduce the roller pressure between the first pressure roller 45 and the second pressure roller 46 to increase the actual thickness d1 of the coating section 201.

[0152] In step S800, for example, when the difference between the actual thickness d1 and the target thickness d2 of the coating section 201 is between -10μm and 10μm, it indicates that the coating section 201 meets the requirements.

[0153] In step S900, the target coating section that meets the requirements is conveyed to the through hole of the second punching mechanism 92, and the second punching mechanism 92 can punch out multiple target electrode sheets from the target coating section, thereby completing the fabrication of the target electrode sheets.

[0154] Furthermore, the moving speed of the baseband 20 is determined. Based on the moving speed of the baseband 20 and the punching time of the first punching mechanism 2, the second punching mechanism 92 can accurately punch out the target electrolytic wafer in the target coating section.

[0155] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An electrode sheet manufacturing device, characterized in that, It includes a support base and a coating mechanism, a first punching mechanism, a first transfer mechanism, a rolling mechanism, a weighing mechanism, a thickness measuring mechanism, a second punching mechanism, an unwinding joint, and a winding joint, all mounted on the support base. The coating mechanism is provided with a coating space through which the base belt passes, and is used to coat the slurry onto the base belt, so that coated sections and uncoated sections are formed on the base belt. The thickness measuring mechanism is provided with a thickness measuring space for the base strip to pass through, for measuring the thickness of the coating section; The first punching mechanism includes a punching drive, a punching seat with a punching protrusion, and a punching top block with a punching through hole. The punching seat is installed at the output end of the punching drive, and a punching space is provided between the punching seat and the punching top block for the baseband to pass through. The punching protrusion enters and exits the punching through hole to punch out coated sheets in the coating section and blank sheets in the uncoated section. The rolling mechanism includes a rolling base, a rolling lifting drive, a rolling rotation drive, a first gear, a second gear, a first pressure roller, and a second pressure roller. The rolling base is installed at the output end of the rolling lifting drive, the rolling rotation drive is installed on the rolling base, the first gear is installed at the output end of the rolling rotation drive, and the second gear is rotatably installed on the support base and meshes with the first gear. The first pressure roller is installed on the first gear, the second pressure roller is installed on the second gear, and a rolling space is provided between the first pressure roller and the second pressure roller. The first transfer mechanism is used to transfer the coated sheet and the blank sheet in the punched through hole to the weighing mechanism, and the weighing mechanism is used to weigh the coated sheet and the blank sheet. The second punching mechanism is provided with a through hole for the baseband to pass through, for punching out the target electrode sheet on the coating section; The base tape released from the unwinding joint passes sequentially through the coating space, the punching space, the thickness measuring space, the rolling space, the thickness measuring space, and the through hole before being wound onto the winding joint.

2. The electrode sheet fabrication equipment according to claim 1, characterized in that, The electrode fabrication equipment also includes a liquid transfer mechanism, a feeding mechanism, and a capping mechanism, all of which are mounted on the support base. The pipetting mechanism includes a clamping assembly, a pipetting assembly, and a moving drive mounted on the support base; the clamping assembly includes a first clamping drive, a first gripper, and a first support plate mounted on the moving drive, the first clamping drive being mounted on the moving drive, and the first gripper being located at the output end of the first clamping drive; the pipetting assembly includes a dropper drive, a dropper, and a second support plate mounted on the moving drive, the dropper drive being mounted on the second support plate, and the dropper being located at the output end of the dropper drive; The feeding mechanism is used to store the liquid storage container containing the slurry; The clamping assembly is used to transfer the liquid storage container between the feeding mechanism and the capping mechanism; The screw-on mechanism is used to open or close the liquid storage container; The pipetting assembly is used to transfer the slurry in the storage container to the coating mechanism via the dropper.

3. The electrode sheet fabrication equipment according to claim 2, characterized in that, The pipetting assembly further includes a second clamping drive and a second gripper, the second clamping drive being mounted on the second support plate and the second gripper being mounted on the output end of the second clamping drive; The coating mechanism includes a coating seat and a film-forming device detachably mounted on the coating seat, and the coating space is disposed between the coating seat and the film-forming device; The electrode sheet fabrication equipment also includes a cleaning mechanism for cleaning the film forming device; The pipetting mechanism is also used to transfer the film-forming device between the coating seat and the cleaning mechanism via the second gripper.

4. The electrode sheet fabrication equipment according to claim 3, characterized in that, The cleaning mechanism includes an unwinding roller, a take-up roller, a first guide roller, a second guide roller, a cleaning seat, a cleaning clamping assembly, and a cleaning rotating assembly; The unwinding roller, the winding roller, the cleaning seat, and the cleaning rotating assembly are all mounted on the support base; The first guide roller, the cleaning clamping assembly, and the second guide roller are sequentially and spaced apart on the cleaning seat. The cleaning clamping assembly is provided with a support groove for accommodating the film maker. The output end of the cleaning rotation assembly is connected to the cleaning clamping assembly. The cleaning tape released by the unwinding roller passes around the first guide roller, through the support groove, and around the second guide roller before winding onto the take-up roller; The cleaning rotation assembly is used for the reciprocating rotation of the cleaning clamping assembly, causing the film former and the cleaning belt to move relative to each other.

5. The electrode sheet fabrication equipment according to claim 4, characterized in that, The cleaning clamping assembly includes a first side block, a second side block, an opening and closing drive component, a clamping base plate, and a clamping top block; the clamping top block has a first inclined surface and a second inclined surface on opposite sides, the supporting groove is disposed on the clamping top block, and the clamping top block is slidably mounted on the clamping base plate; the opening and closing drive component is mounted on the side of the clamping base plate opposite to the clamping top block, and the output end of the cleaning rotation assembly is connected to the first side block; The first side block is provided with a first positioning pin and a first roller, and the second side block is provided with a second positioning pin and a second roller; The first side block and the second side block are respectively installed on the two opposite output ends of the opening and closing drive member, the first roller abuts against the first inclined surface, and the second roller abuts against the second inclined surface; When the opening and closing drive causes the first side block and the second side block to move closer to each other, the first positioning pin and the second positioning pin clamp the film-making device from opposite ends, and the first roller and the second roller drive the clamping top block to move upward so that the cleaning belt fits the film-making device. When the opening and closing drive causes the first side block and the second side block to move away from each other, the first roller and the second roller cause the clamping top block to move down, so that the cleaning belt moves away from the film forming device.

6. The electrode sheet fabrication equipment according to claim 2, characterized in that, The feeding mechanism has multiple liquid storage containers, which can store different slurries, and each liquid storage container is labeled. The electrode sheet manufacturing equipment also includes a barcode scanner and an inkjet printer, both mounted on the support base; The clamping assembly is also used to move the liquid storage container to the barcode scanner so that the barcode scanner can scan the label on the liquid storage container; The coating mechanism is used to coat multiple coated segments spaced apart on the baseband, with an uncoated segment between two adjacent coated segments; The inkjet printer is used to print identification codes on the coating section, and the identification codes correspond one-to-one with the labels.

7. The electrode sheet fabrication equipment according to claim 6, characterized in that, The electrode sheet fabrication equipment also includes an oven mounted on the support base, the oven having a baking space; The base tape released from the unwinding joint passes sequentially through the coating space, the baking space, the punching space, the thickness measuring space, the rolling space, and the thickness measuring space before winding onto the take-up joint; The inkjet printer is used to print codes on the coating section between the baking space and the punching space.

8. The electrode sheet fabrication equipment according to claim 1, characterized in that, The thickness measuring mechanism includes a thickness measuring base, a thickness measuring sensor, a thickness measuring lifting drive, and a pressure head installed at the output end of the thickness measuring lifting drive. The thickness measuring lifting drive and the thickness measuring sensor are both installed on the thickness measuring base, and the thickness measuring base is installed on the support base. The thickness measuring lifting drive is used to drive the pressure head to press the coating section onto the thickness measuring base, and the thickness measuring sensor is used to measure the thickness of the coating section located on the base.

9. The electrode sheet fabrication equipment according to claim 1, characterized in that, The electrode sheet manufacturing equipment also includes a feeding tray and a second transfer mechanism mounted on the support base; The second transfer mechanism is used to transfer the target electrode sheet punched out by the second punching mechanism to the unloading tray.

10. A method for manufacturing an electrode sheet, applied to the electrode sheet manufacturing apparatus as described in any one of claims 1 to 9, characterized in that, include: Control the unwinding joint to release the base tape, and control the winding joint to wind up the base tape, so that the base tape released by the unwinding joint passes through the coating space, punching space, thickness measuring space, rolling space and thickness measuring space in sequence and then wraps around the winding joint. The coating mechanism is controlled to apply slurry onto the base belt, so that coated sections and uncoated sections are formed on the base belt; The first punching mechanism is controlled to cut coated sheets in the coating section and to punch blank sheets in the uncoated section; The first transfer mechanism is controlled to transfer the coated sheet and blank sheet on the first punching mechanism to the weighing mechanism, and the weighing mechanism is controlled to weigh the coated sheet and the blank sheet respectively to obtain the first weight of the coated sheet and the second weight of the blank sheet. The roller pressing mechanism is controlled to press the coating section; The thickness measuring mechanism is controlled to measure the actual thickness of the coated section after roller pressing. The target thickness of the coated section after roll pressing is determined based on the first weight, the second weight, the area of ​​the blank sheet or coated sheet, the thickness of the uncoated section, and the target compaction density of the coated section. The roller gap of the roller pressing space is adjusted in real time according to the target thickness so that the actual thickness of the coated sheet is adjusted to be within the target range as the difference between the actual thickness and the target thickness is within the target range, so as to obtain the completed target coated section. The second punching mechanism is controlled to punch out the target electrode sheet in the target coating section.

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