A roll forming apparatus

Abstract

This invention belongs to the technical field of battery electrode production equipment, specifically a roll forming equipment, including a feeding box, a powder forming roller, a pressing roller, an unwinding component, a primary edge trimming component, a secondary edge trimming component, a frame, and a winding component. The secondary edge trimming component includes a first directional roller, a second directional roller, a first edge trimming unit, and a second edge trimming unit. In this invention, the electrode sheet obtained by roll forming is first fed into the first edge trimming unit through the first directional roller. The first edge trimming unit then removes the insulating layer edge on one side of the foil. Subsequently, the second edge trimming unit removes the insulating layer edge on the other side of the foil, thus ensuring that the foil is not damaged while removing the insulating layer. Compared with the existing method of trimming the edge before roll forming, this process can effectively prevent the electrode sheet from warping and bulging during use, thereby improving the safety and service life of the battery.

Description

Technical Field

[0001] This invention belongs to the technical field of battery electrode production equipment, specifically a roll forming equipment. Background Technology

[0002] Lithium-ion batteries are primary batteries that use lithium metal or lithium alloys as the negative electrode material and a non-aqueous electrolyte solution. Electrodes are a crucial component of lithium-ion batteries, and their quality directly affects the overall quality of the battery. The manufacturing process of electrodes mainly includes mixing, coating, rolling, and slitting. Existing electrode preparation methods include dry electrode fabrication, which involves first rolling raw materials into films, and then laminating them onto foils to form the positive or negative electrode of the battery.

[0003] Existing dry electrode roll forming equipment uses a process route where powdered insulating material is roll-pressed into sheets, edge-trimmed, and then rolled layer by layer with foil to obtain the finished battery electrode sheet, which is then directly wound into a roll. Therefore, this process cannot meet the high-precision edge flatness requirements, and the battery electrodes produced by this process are prone to side warping and bulging after subsequent battery processing, significantly affecting battery quality and safety. On the other hand, if a roll-forming composite process is adopted, it presents significant technical challenges to trim the insulating layers on both sides of the rolled foil again; therefore, careful design is required to ensure successful implementation. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a roll forming equipment. This invention primarily addresses the problem that existing roll forming equipment uses a process route where powdered insulating material is rolled into sheets, edge-trimmed, and then rolled layer by layer with foil to obtain the final battery electrode sheet, which is then directly wound into a roll. Therefore, this process cannot meet the high-precision edge flatness requirements, and the battery electrodes produced by this process are prone to side warping and bulging after subsequent battery processing, significantly affecting battery quality and safety.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides a roll forming device, including a feeding box, a powder forming roller, a pressing roller, an unwinding component, a primary edge trimming component, a secondary edge trimming component, a frame, and a winding component. The feeding boxes are symmetrically arranged at both ends of the frame; a pair of powder forming rollers are arranged below the feeding boxes; multiple pressing rollers are arranged side-by-side with the powder forming rollers; the roller gap between adjacent pressing rollers gradually decreases along the middle direction of the frame; the unwinding component is arranged above the middle of the frame; the secondary edge trimming component is arranged below the middle of the frame; the primary edge trimming component is arranged below the powder forming roller near the pressing roller; and a winding component is arranged at one end of the frame.

[0006] The secondary trimming component includes a first directional roller, a second directional roller, a first trimming unit, and a second trimming unit; the first trimming unit and the second trimming unit have the same structure; the first trimming unit and the second trimming unit are arranged opposite each other and staggered vertically; the first trimming unit and the second trimming unit respectively cut off the insulating layer on both sides of the foil; the first directional roller is arranged diagonally above the first trimming unit; the second directional roller is arranged diagonally below the second trimming unit.

[0007] During operation, the insulating material powder is placed in the feeding hopper, and then crushed into a sheet by the powder forming roller below. This sheet is then wound into the pressing roller by the powder forming roller on one side. The sheet-like insulating layer is then pressed by the pressing roller and conveyed to the center of the frame. Simultaneously, the unwinding component above the center of the frame feeds the foil into the gap between the two pressing rollers in the center of the frame. Therefore, the insulating layers on both sides of the foil merge with the foil and are then rolled and compounded by the two pressing rollers in the center of the frame. After the insulating material powder is rolled into a sheet-like insulating layer by the powder forming roller, it is first initially trimmed by a pre-trimming component located below the powder forming roller near the pressing roller. This ensures that the width of the insulating layer is fixed and the sides are neat, preparing for subsequent layer-by-layer rolling. When the electrode sheet obtained by rolling and compounding the foil and insulating layer passes through a secondary trimming component, excess material is removed. The insulating layer is distributed on both sides of the foil, so it is necessary to remove the insulating layer edges on both sides of the foil separately. Therefore, in this invention, the electrode sheet obtained by roll forming is first fed into the first trimming unit through the first directional roller, and then the first trimming unit removes the insulating layer edge on one side of the foil. Subsequently, the insulating layer edge on the other side of the foil is removed through the second trimming unit, so as to ensure that the foil is not damaged while removing the insulating layer. Then, the electrode sheet is conveyed to the winding component through the second directional roller. This invention, by first roll forming the foil and insulating layer, and then removing the insulating layer on both sides of the foil after lamination, effectively prevents the electrode sheet from warping and bulging during use compared to the existing electrode sheet obtained by first trimming and then roll forming, thereby improving the safety and service life of the battery. The battery electrode sheet after being trimmed by the secondary trimming component is wound into a roll by the winding component.

[0008] Preferably, the first trimming unit includes a mounting box, a linear guide assembly, a reversing roller, a mounting rod, an air knife, and a collection trough; the mounting box is connected to the frame via the horizontally arranged linear guide assembly; the reversing roller is rotatably connected to the middle of the mounting box; two air knives are vertically arranged downwards above the reversing roller; the air knives are connected to an external high-pressure air supply system; the air knives are fixedly connected to the mounting rod via a clamping structure; the mounting rod is fixedly connected to the mounting box; the collection trough is arranged below the reversing roller; the collection trough is fixedly connected to the mounting box.

[0009] During operation, the electrode sheet obtained by roll forming passes over the first directional roller, then successively passes over the reversing rollers of the first and second trimming units, and finally enters the winding unit after passing over the second directional roller. While the electrode sheet is in the first trimming unit, a high-pressure airflow is blown vertically downwards along the tangent of the reversing roller. This high-pressure airflow breaks up the excess edges of the insulation layer on one side of the foil and sends them into the collection trough below. Subsequently, the second trimming unit breaks up and collects the excess edges of the insulation layer on the other side of the foil, thus achieving insulation separation on both sides of the foil. The insulating layer is removed, enabling high-precision cutting of the insulating side edges of the electrode sheet after roll forming. This allows for the successful implementation of the roll forming followed by edge cutting process, ensuring battery quality and safety. This design utilizes a high-pressure airflow from an air knife to cut the insulating side edges of the foil. This not only achieves high-precision cutting but also avoids damage to the foil during the process, ensuring the feasibility of the roll forming followed by edge cutting process. This process yields the advantages of the roll forming followed by edge cutting, such as less edge warping and bulging, thus improving battery safety and lifespan. The linear guide assembly can adjust the positions of the first and second edge cutting units, thereby tensioning the electrode sheet so that it can be accurately edge-cut by the high-pressure airflow.

[0010] Preferably, the first trimming unit further includes a suction and filtration device; the collection trough is a cylindrical structure with a slot, and one side of the slot extends outward with an inclined plate; one end of the collection trough is connected to the inlet of the suction and filtration device; the suction and filtration device is used to transport and collect the insulation waste entering the collection trough using suction force.

[0011] This design connects one end of the collection tank to a suction and filtration device. The insulation waste, shattered by the air knife, enters the collection tank via an inclined plate above it. The suction force of the filtration device promptly transports and collects the waste. Firstly, because this design uses a high-pressure airflow from an air knife to shatter the insulation waste, negative pressure suction can be used to promptly remove the waste from the collection tank, eliminating the need for regular manual cleaning and ensuring continuous use, thus improving convenience. Secondly, the suction method for transferring the insulation waste from the collection tank, under the influence of negative pressure suction, causes airflow around the tank opening to converge into the tank, preventing dust generated by the air knife shattering the insulation layer from becoming airborne and thus preventing dust pollution.

[0012] Preferably, the first trimming unit further includes a spiral conveying mechanism; the spiral conveying mechanism is disposed within the collection trough; the spiral conveying mechanism includes a rotating seat, a rotating rod, a spiral plate, elastic wires, and a spoke support member; the rotating rod is coaxially arranged with the collection trough; one end of the rotating rod is rotatably connected to the closed end face of the collection trough via the rotating seat; the other end of the rotating rod is rotatably connected to the inner wall of the open end of the collection trough via the spoke support member; the spiral plate is fixedly connected to the cylindrical surface of the rotating rod; the elastic wires are evenly spaced and fixedly connected to the outer edge of the spiral plate.

[0013] During operation, under the negative pressure suction of the suction and filtration device, the airflow flows from the closed end to the open end of the collection tank. This, in turn, moves the insulating waste in the collection tank and drives the spiral plate to rotate. This, in turn, drives the rotating rod and the spirally spaced elastic wires on it to rotate. As the spirally spaced elastic wires rotate, they sweep the fine particles and dust at the bottom of the collection tank towards the open end, thus compensating for the conveying defects of the suction method. This ensures that the insulating waste in the collection tank can be thoroughly removed. Otherwise, small particles and dust will accumulate at the bottom of the collection tank over time, eventually clogging it. The risk of continuous accumulation of small particles and dust at the bottom of the collection tank is greater when the collection tank is long. The spiral conveying mechanism effectively solves this technical problem.

[0014] Preferably, the air knife includes a clamping and fixing seat, a first blade body, a second blade body, and an air inlet connector; the clamping and fixing seat is fixedly connected to the mounting rod by bolts; the lower end of the clamping and fixing seat is fixed to the first blade body; the first blade body and the second blade body are pressed together to form a closed cavity and locked together by screws; the side of the first blade body is provided with the air inlet connector for connecting to the internal closed cavity; an air guide groove is provided on the contact surface of the first blade body and the second blade body; a trimming groove is provided at one end of the air guide groove.

[0015] By connecting the external high-pressure air supply system to the air inlet connector, the high-pressure airflow is delivered through the closed cavity inside the first and second cutter bodies to the air guide groove and trimming groove for ejection. The high-pressure airflow is then ejected vertically downward from the air guide groove and trimming groove, thereby cutting off the side edge of the insulating layer on the foil material surrounding the reversing roller.

[0016] Preferably, the trimming groove is a wedge-shaped groove structure, and the tip of the wedge-shaped groove structure is inclined outward.

[0017] By setting the trimming groove as a wedge-shaped groove structure with the tip of the wedge-shaped groove tilted outward, the airflow speed at the tip is faster and thus sharper due to the wedge-shaped groove structure. Furthermore, because the tip of the wedge-shaped groove is tilted outward, the sharp airflow ejected through the tip of the trimming groove can make the cut edge of the insulation layer smoother. Also, because of the outward tilt, the cut edge after being cut by the tip will not be sprayed by the high-speed airflow ejected by the subsequent trimming groove, further ensuring the smoothness of the cut edge and thus improving the production quality of the battery.

[0018] Preferably, the initial trimming component includes a mounting plate, a linear sliding assembly, a fixing plate, a vertical adjustment mechanism, a rolling cutter, a hinge seat, a support wheel, and a connecting plate; the mounting plate is fixedly connected to the frame; the linear sliding assembly is horizontally arranged on the mounting plate; the vertical adjustment mechanism is connected to the linear sliding assembly via the fixing plate; the rolling cutter is rotatably connected to the vertical adjustment mechanism via the hinge seat; the rolling cutter is a cylindrical roller with an annular blade along the circumferential direction; the support wheel is connected to the hinge seat via the connecting plate; the support wheel is rotatably connected to one end of the connecting plate.

[0019] During operation, the cutting width of the roller cutter is adjusted by the linear sliding assembly, and the distance between the roller cutter and the powder forming roller is adjusted by the vertical adjustment mechanism, which essentially adjusts the cutting depth of the roller cutter. In this case, the roller cutter is a driven wheel, so it does not tear the insulating layer during the cutting process; it only exerts a radial extrusion force along the powder forming roller. Therefore, the roller cutter method can make the cut edge of the insulating layer smoother, thereby improving the processing quality of the battery electrode sheet. Moreover, by connecting a support wheel to one side of the roller cutter via a connecting plate, and with the support wheel positioned axially on the outside of the roller cutter blade, after the roller cutter makes a slit on the side of the insulating layer on the powder forming roller, the support wheel prevents the cut edge of the insulating layer from tearing downwards under its own weight, thus avoiding the problem of uneven cut edges caused by tearing of the insulating layer edge, thereby improving the processing quality of the insulating layer.

[0020] Preferably, the connecting plate is rotatably connected to the hinge seat; a vertical stop bar is provided on the connecting plate; at least two sets of compression springs are provided between the vertical stop bar and the side of the support plate of the hinge seat.

[0021] By setting a compression spring between the vertical stop bar and the side of the support plate of the hinge seat, the support wheel can swing by squeezing the compression spring when subjected to external force, which allows the cut edge of the insulation layer to be peeled off from the powder forming roller more smoothly, thereby improving the stability during the rolling process.

[0022] Preferably, a transmission pulley is fixedly connected to the side of the rolling cutter; the transmission pulley and the support pulley are synchronously driven by a synchronous belt, and the two rotate at the same speed.

[0023] By setting a synchronous belt between the drive pulley and the support pulley to achieve synchronous transmission, and with both rotating at the same speed, the support pulley can be driven to rotate synchronously when the powder forming roller drives the rolling cutter to roll and cut the slit. This allows the support pulley to convey the cut edge of the insulation layer to the outside, thus preventing the insulation layer from jamming due to the support pulley not conveying the edge in time, thereby improving the stability of the rolling process.

[0024] Preferably, the cylindrical surface of the support wheel is roughened.

[0025] By roughening the cylindrical surface of the support wheel, the cut edges of the insulation layer that have been removed are prevented from moving axially left and right on the surface of the support wheel, which would cause the uncut insulation layer to be torn apart. This further improves the flatness of the cut edges on both sides of the insulation layer, thereby improving the production quality of the battery.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention feeds the electrode sheet obtained by roll forming and bonding with a first directional roller into a first trimming unit. The first trimming unit then removes the insulating layer edge on one side of the foil. Subsequently, a second trimming unit removes the insulating layer edge on the other side of the foil. This ensures that the foil is not damaged while removing the insulating layer. The electrode sheet is then conveyed to a winding component by a second directional roller. This invention, by first roll forming and bonding the foil and insulating layer, and then removing the insulating layer from both sides of the bonded foil, effectively prevents edge warping and bulging during use, compared to existing methods that involve trimming before roll forming and bonding, thus improving battery safety and lifespan. The battery electrode sheet, trimmed by the second trimming unit, is then wound into a roll by the winding component.

[0028] 2. This invention uses a high-pressure airflow from an air knife to cut the insulating layers on both sides of the foil. This not only achieves high-precision cutting but also avoids damaging the foil during the insulation removal process. This ensures the feasibility of a pre-rolling and post-cutting process, thus achieving the advantages of this method, such as less edge warping and bulging of the battery, thereby improving battery safety and lifespan. The linear guide assembly can adjust the positions of the first and second cutting units, thereby tensioning the electrode sheets so that they can be accurately cut by the high-pressure airflow.

[0029] 3. This invention connects one end of the collection tank to a suction and filtration device. The insulation waste, broken up by the air knife, enters the collection tank along the inclined plate above it. Under the suction force of the suction and filtration device, the insulation waste is promptly transported and collected. Firstly, because this invention uses a high-pressure airflow from an air knife to break up the insulation waste, negative pressure suction can be used to promptly transfer the insulation waste into the collection tank, eliminating the need for regular manual cleaning and ensuring continuous use of the collection tank, thus improving convenience. Secondly, the suction method for transferring the insulation waste in the collection tank, under the action of negative pressure suction, causes airflow around the opening of the collection tank to converge into the tank, preventing dust generated by the air knife breaking up the insulation layer from flying and thus preventing dust pollution of the environment.

[0030] 4. In this invention, under the negative pressure suction of the suction filtration device, the airflow flows from the closed end to the open end of the collection tank, thereby moving the insulating waste in the collection tank and driving the spiral plate to rotate. This, in turn, drives the rotating rod and the spirally spaced elastic wires on it to rotate. As the spirally spaced elastic wires rotate, they sweep the fine particles and dust at the bottom of the collection tank towards the open end, thus compensating for the conveying defects of the suction method and ensuring that the insulating waste in the collection tank can be thoroughly removed. Otherwise, small particles and dust will continuously accumulate at the bottom of the collection tank over a long period of time, eventually clogging the collection tank. The risk of continuous accumulation of small particles and dust at the bottom of the collection tank is greater when the length of the collection tank is long. The spiral conveying mechanism can effectively solve this technical problem. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the overall structure of the roll forming equipment of the present invention;

[0033] Figure 2 This is a schematic diagram of the internal structure of the roll forming equipment of the present invention;

[0034] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0035] Figure 4 This is a two-dimensional schematic diagram of the initial cutting edge component in the working state of this invention;

[0036] Figure 5 This is a schematic diagram of the initial cutting edge component in this invention;

[0037] Figure 6 This is a schematic diagram of the connection between the transmission pulley and the timing belt in this invention;

[0038] Figure 7 This is a schematic diagram of the secondary edge-cutting component in this invention;

[0039] Figure 8 This is a schematic diagram of the internal structure of the first cutting edge unit in this invention;

[0040] Figure 9 This is a schematic diagram of the spiral plate and elastic wire in this invention;

[0041] Figure 10 This is a schematic diagram of the trimming groove and the collection groove in this invention;

[0042] In the diagram: 1. Feeding box; 2. Powder forming roller; 3. Rolling roller; 4. Unwinding component; 5. Initial trimming component; 5. Mounting plate; 51. Linear sliding assembly; 52. Fixing plate; 53. Vertical adjustment mechanism; 54. Rolling cutter; 55. Transmission pulley; 551. Synchronous belt; 552. Hinge seat; 56. Support wheel; 57. Connecting plate; 58. Compression spring; 59. Secondary trimming component; 6. First directional roller; 61. Second directional roller; 62. First trimming unit; 63. Mounting box. 1. Linear guide rail assembly 632, reversing roller 633, mounting rod 634, air knife 635, clamping and fixing seat 6351, first cutter body 6352, second cutter body 6353, air inlet connector 6354, air guide groove 6355, trimming groove 6356, collecting groove 636, second trimming unit 64, rotating seat 641, rotating rod 642, spiral plate 645, elastic wire 646, spoke support 647, frame 7, winding component 8. Detailed Implementation

[0043] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0044] like Figures 1 to 3 As shown, a roll forming device includes a feeding box 1, a powder forming roller 2, a pressing roller 3, an unwinding component 4, a primary edge trimming component 5, a secondary edge trimming component 6, a frame 7, and a winding component 8. The feeding boxes 1 are symmetrically arranged at both ends of the frame 7; a pair of powder forming rollers 2 are arranged below the feeding boxes 1; multiple pressing rollers 3 are arranged side-by-side with the powder forming rollers 2; the roller gap between adjacent pressing rollers 3 gradually decreases along the middle direction of the frame 7; the unwinding component 4 is arranged above the middle of the frame 7; the secondary edge trimming component 6 is arranged below the middle of the frame 7; the primary edge trimming component 5 is arranged below the powder forming roller 2 near the pressing roller 3; and the winding component 8 is arranged at one end of the frame 7.

[0045] The secondary trimming component 6 includes a first directional roller 61, a second directional roller 62, a first trimming unit 63, and a second trimming unit 64; the first trimming unit 63 and the second trimming unit 64 have the same structure; the first trimming unit 63 and the second trimming unit 64 are arranged opposite each other and staggered vertically; the first trimming unit 63 and the second trimming unit 64 respectively cut off the insulating layer on both sides of the foil; the first directional roller 61 is arranged diagonally above the first trimming unit 63; the second directional roller 62 is arranged diagonally below the second trimming unit 64.

[0046] During operation, the insulating material powder is placed in the feeding box 1, and then the powder is rolled into a sheet by the powder forming roller 2 below and wound into the pressing roller 3 by the powder forming roller 2 on one side. The sheet-like insulating layer is then rolled by the pressing roller 3 and conveyed to the middle of the frame 7. At the same time, the unwinding component 4 above the middle of the frame 7 conveys the foil to the roller gap of the two pressing rollers 3 in the middle of the frame 7. Therefore, the insulating layers on both sides of the foil are combined with the foil and then rolled and compounded by the two pressing rollers 3 in the middle of the frame 7. After the insulating material powder is rolled into a sheet-like insulating layer by the powder forming roller 2, it is first initially trimmed by the initial trimming component 5 located below the powder forming roller 2 near the pressing roller 3, so that the width of the insulating layer is fixed and the sides are neat, preparing for subsequent layer-by-layer rolling. When the electrode sheet obtained by rolling and compounding the foil and the insulating layer is trimmed by the secondary trimming component 6, due to this Excess insulation layer is distributed on both sides of the foil, so it is necessary to remove the insulation layer edges on both sides of the foil separately. Therefore, in this invention, the electrode sheet obtained by roll forming is first fed into the first trimming unit 63 through the first directional roller 61, and then the first trimming unit 63 removes the insulation layer edge on one side of the foil. Then, the second trimming unit 64 removes the insulation layer edge on the other side of the foil, thus ensuring that the foil is not damaged while removing the insulation layer. Then, the electrode sheet is conveyed to the winding member 8 through the second directional roller 62. In this invention, by first roll forming the foil and insulation layer, and then removing the insulation layer on both sides of the formed foil, this process can effectively prevent the edge of the electrode sheet from curling and bulging during use, compared with the existing electrode sheet obtained by first trimming and then roll forming, thereby improving the safety and service life of the battery. The battery electrode sheet after being trimmed by the secondary trimming member 6 is wound into a roll by the winding member 8.

[0047] like Figures 7 to 8As shown, the first trimming unit 63 includes a mounting box 631, a linear guide assembly 632, a reversing roller 633, a mounting rod 634, an air knife 635, and a collection groove 636. The mounting box 631 is connected to the frame 7 via the horizontally arranged linear guide assembly 632. The reversing roller 633 is rotatably connected to the middle of the mounting box 631. Two air knives 635 are vertically arranged above the reversing roller 633 and pointing downwards. The air knives 635 are connected to an external high-pressure air supply system. The air knives 635 are fixedly connected to the mounting rod 634 via a clamping structure. The mounting rod 634 is fixedly connected to the mounting box 631. The collection groove 636 is arranged below the reversing roller 633. The collection groove 636 is fixedly connected to the mounting box 631.

[0048] During operation, the electrode sheet obtained by roll forming passes over the first directional roller 61, then successively passes over the reversing roller 633 of the first trimming unit 63 and the reversing roller 633 of the second trimming unit 64, and finally enters the winding component 8 after passing over the second directional roller 62. When the electrode sheet obtained by roll forming is in the first trimming unit 63, the air knife 635 blows high-pressure airflow vertically downward along the tangential direction of the reversing roller 633. The two high-pressure airflows then break up the excess edges of the insulating layer on one side of the foil and enter the collection groove 636 below along the airflow direction. Subsequently, the excess edges of the insulating layer on the other side of the foil are broken up and collected by the second trimming unit 64. This process removes the insulating layers on both sides of the foil, enabling high-precision cutting of the insulating edges on both sides of the rolled-laminated electrode. This allows for the successful implementation of the roll-laminated-then-cutting process, ensuring battery quality and safety. The invention utilizes a high-pressure airflow from an air knife 635 to cut the insulating edges of the foil, achieving high-precision cutting without damaging the foil during the process. This ensures the feasibility of the roll-laminated-then-cutting process, resulting in the advantages of less edge warping and bulging, thus improving battery safety and lifespan. The linear guide assembly 632 adjusts the positions of the first cutting unit 63 and the second cutting unit 64, tensioning the electrode so that it can be accurately cut by the high-pressure airflow.

[0049] like Figure 8 As shown, the first trimming unit 63 further includes a suction and filtration device; the collection trough 636 is a cylindrical structure with a slot, and one side of the slot extends outward with an inclined plate; one end of the collection trough 636 is connected to the inlet of the suction and filtration device; the suction and filtration device is used to transport and collect the insulation waste entering the collection trough 636 by suction force.

[0050] This invention connects one end of the collection tank 636 to a suction and filtration device. The insulation waste, broken up by the air knife 635, enters the collection tank 636 via an inclined plate above it. Under the suction force of the suction and filtration device, the insulation waste is promptly transported and collected. Firstly, because this invention uses the air knife 635 to spray high-pressure airflow to break up the insulation waste, negative pressure suction can be used to promptly transfer the insulation waste into the collection tank 636, eliminating the need for regular manual cleaning and ensuring the continuous use of the collection tank 636, thus improving ease of use. Secondly, the suction method for transferring the insulation waste in the collection tank 636, under the action of negative pressure suction, causes airflow around the opening of the collection tank 636 to converge into the collection tank 636, thereby preventing dust generated by the air knife 635 breaking up the insulation layer from flying and thus preventing dust pollution of the environment.

[0051] like Figure 9 As shown, the first trimming unit 63 further includes a spiral conveying mechanism; the spiral conveying mechanism is disposed within the collection groove 636; the spiral conveying mechanism includes a rotating seat 641, a rotating rod 642, a spiral plate 645, elastic wires 646, and a spoke support member 647; the rotating rod 642 is coaxially arranged with the collection groove 636; one end of the rotating rod 642 is rotatably connected to the closed end face of the collection groove 636 through the rotating seat 641; the other end of the rotating rod 642 is rotatably connected to the inner wall of the open end of the collection groove 636 through the spoke support member 647; the spiral plate 645 is fixedly connected to the cylindrical surface of the rotating rod 642; the elastic wires 646 are evenly spaced and fixedly connected to the outer edge of the spiral plate 645.

[0052] During operation, under the negative pressure suction of the suction and filtration device, the airflow flows from the closed end to the open end of the collection tank 636. This, in turn, moves the insulating waste in the collection tank 636 and drives the spiral plate 645 to rotate. This, in turn, drives the rotating rod 642 and the spirally spaced elastic wires 646 on it to rotate. As the spirally spaced elastic wires 646 rotate, they sweep the fine particles and dust at the bottom of the collection tank 636 towards the open end of the collection tank 636. This compensates for the conveying defects of the suction method and ensures that the insulating waste in the collection tank 636 can be thoroughly removed. Otherwise, small particles and dust will accumulate at the bottom of the collection tank 636 over a long period of time, eventually clogging the collection tank 636. The risk of continuous accumulation of small particles and dust at the bottom of the collection tank 636 is greater when the length of the collection tank 636 is long. The spiral conveying mechanism can effectively solve this technical problem.

[0053] like Figure 8As shown, the air knife 635 includes a clamping and fixing seat 6351, a first blade 6352, a second blade 6353, and an air inlet connector 6354. The clamping and fixing seat 6351 is fixedly connected to the mounting rod 634 by bolts. The lower end of the clamping and fixing seat 6351 is fixed to the first blade 6352. The first blade 6352 and the second blade 6353 are pressed together to form a closed cavity and locked together by screws. The side of the first blade 6352 is provided with the air inlet connector 6354 for connecting to the internal closed cavity. An air guide groove 6355 is provided on the contact surface of the first blade 6352 and the second blade 6353. A trimming groove 6356 is provided at one end of the air guide groove 6355.

[0054] By connecting the external high-pressure air supply system to the air inlet connector 6354, the high-pressure airflow is transported through the closed cavity in the first cutter body 6352 and the second cutter body 6353 to the air guide groove 6355 and the trimming groove 6356 and ejected. The high-pressure airflow is then ejected vertically downward from the air guide groove 6355 and the trimming groove 6356, thereby cutting off the side edge of the insulating layer of the foil material surrounding the reversing roller 633.

[0055] like Figure 10 As shown, the trimming groove 6356 is a wedge-shaped groove structure, and the tip of the wedge-shaped groove structure is inclined outward.

[0056] By setting the trimming groove 6356 as a wedge-shaped groove structure with the tip of the wedge-shaped groove tilted outward, the airflow speed at the tip is faster and thus sharper due to the wedge-shaped groove structure. Furthermore, because the tip of the wedge-shaped groove is tilted outward, the sharp airflow ejected from the tip of the trimming groove 6356 can make the cut edge of the insulation layer smoother. Also, because of the outward tilt, the cut edge after being cut by the tip will not be sprayed by the high-speed airflow ejected from the trimming groove 6356 afterward, further ensuring the smoothness of the cut edge and thus improving the production quality of the battery.

[0057] like Figures 4 to 6 As shown, the initial trimming component 5 includes a mounting plate 51, a linear sliding assembly 52, a fixing plate 53, a vertical adjustment mechanism 54, a rolling cutter 55, a hinge seat 56, a support wheel 57, and a connecting plate 58. The mounting plate 51 is fixedly connected to the frame 7. The linear sliding assembly 52 is horizontally arranged on the mounting plate 51. The vertical adjustment mechanism 54 is connected to the linear sliding assembly 52 through the fixing plate 53. The rolling cutter 55 is rotatably connected to the vertical adjustment mechanism 54 through the hinge seat 56. The rolling cutter 55 is a cylindrical roller with an annular blade along the circumferential direction. The support wheel 57 is connected to the hinge seat 56 through the connecting plate 58. The support wheel 57 is rotatably connected to one end of the connecting plate 58.

[0058] During operation, the cutting width of the roller cutter 55 is adjusted by the linear sliding assembly 52, and the distance between the roller cutter 55 and the powder forming roller 2 is adjusted by the vertical adjustment mechanism 54, which essentially adjusts the cutting depth of the roller cutter 55. This invention employs a roller-type cutting method. Since the roller cutter 55 is a driven wheel, it exerts no tearing force on the insulation layer during cutting; it only exerts radial extrusion force along the powder forming roller 2. Therefore, the roller-type cutting method results in a smoother cut edge on the insulation layer, thereby improving… The processing quality of the battery electrode sheets is improved; moreover, by connecting the support wheel 57 to one side of the rolling cutter 55 via the connecting plate 58, and the support wheel 57 is arranged on the outside of the cutting edge of the rolling cutter 55 in the axial direction, after the rolling cutter 55 cuts a slit on the side of the insulating layer on the powder forming roller 2, the support of the support wheel 57 prevents the cut edge of the insulating layer from tearing downwards under its own gravity, thus avoiding the problem of uneven cutting edges caused by tearing of the insulating layer edge, thereby improving the processing quality of the insulating layer.

[0059] like Figures 5 to 6 As shown, the connecting plate 58 is rotatably connected to the hinge seat 56; a vertical stop bar is provided on the connecting plate 58; at least two sets of compression springs 59 are provided between the vertical stop bar and the side of the support plate of the hinge seat 56.

[0060] By setting a compression spring 59 between the vertical stop bar and the side of the support plate of the hinge seat 56, the support wheel 57 can swing by squeezing the compression spring 59 when subjected to external force, thereby making the cut edge of the insulation layer that has been removed more smoothly peel off from the powder forming roller 2, thus improving the stability during the rolling process.

[0061] like Figure 6 As shown, the side of the rolling cutter 55 is fixedly connected to the transmission pulley 551; the transmission pulley 551 and the support wheel 57 are synchronously driven by the synchronous belt 552, and the two rotate at the same speed.

[0062] By setting the transmission pulley 551 and the support pulley 57 to achieve synchronous transmission through the synchronous belt 552, and the two rotating at the same speed, the support pulley 57 can also be driven to rotate synchronously when the powder forming roller 2 drives the rolling cutter 55 to roll and cut the slit. This allows the support pulley 57 to convey the cut edge of the insulation layer to the outside, thus preventing the insulation layer from getting stuck due to the support pulley 57 not conveying in time, thereby improving the stability of the rolling process.

[0063] The cylindrical surface of the support wheel 57 is roughened.

[0064] By roughening the cylindrical surface of the support wheel 57, the cut edge of the insulation layer that has been removed is prevented from moving axially left and right on the surface of the support wheel 57, which would cause the uncut insulation layer to be torn apart. This further improves the flatness of the cut edges on both sides of the insulation layer, thereby improving the production quality of the battery.

[0065] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A roll forming equipment, characterized in that: The machine includes a feeding box (1), a powder forming roller (2), a rolling roller (3), an unwinding component (4), a primary trimming component (5), a secondary trimming component (6), a frame (7), and a winding component (8); the feeding boxes (1) are symmetrically arranged at both ends of the frame (7); a pair of powder forming rollers (2) are arranged below the feeding boxes (1); multiple rolling rollers (3) are arranged side by side with the powder forming rollers (2); the roller gap between adjacent rolling rollers (3) gradually decreases along the middle direction of the frame (7); the unwinding component (4) is arranged above the middle of the frame (7); the secondary trimming component (6) is arranged below the middle of the frame (7); the primary trimming component (5) is arranged below the powder forming roller (2) near the rolling roller (3); and the winding component (8) is arranged at one end of the frame (7). The secondary trimming component (6) includes a first directional roller (61), a second directional roller (62), a first trimming unit (63), and a second trimming unit (64); the first trimming unit (63) and the second trimming unit (64) have the same structure; the first trimming unit (63) and the second trimming unit (64) are arranged opposite to each other and staggered vertically; the first trimming unit (63) and the second trimming unit (64) respectively cut off the insulating layer on both sides of the foil; the first directional roller (61) is arranged diagonally above the first trimming unit (63); the second directional roller (62) is arranged diagonally below the second trimming unit (64); The first trimming unit (63) includes a mounting box (631), a linear guide assembly (632), a reversing roller (633), a mounting rod (634), an air knife (635), and a collection trough (636). The mounting box (631) is connected to the frame (7) via the horizontally arranged linear guide assembly (632). The reversing roller (633) is rotatably connected to the middle of the mounting box (631). Two air knives (635) are vertically arranged above the reversing roller (633) and pointing downwards. The air knives (635) are connected to an external high-pressure air supply system. The air knives (635) are fixedly connected to the mounting rod (634) via a clamping structure. The mounting rod (634) is fixedly connected to the mounting box (631). The collection trough (636) is arranged below the reversing roller (633). The collection trough (636) is fixedly connected to the mounting box (631). The air knife (635) includes a clamping and fixing seat (6351), a first blade (6352), a second blade (6353), and an air inlet connector (6354); the clamping and fixing seat (6351) is fixedly connected to the mounting rod (634) by bolts; the lower end of the clamping and fixing seat (6351) is fixed to the first blade (6352); the first blade (6352) and the second blade (6353) are pressed together to form a closed cavity and are secured by screws. The first cutter body (6352) is provided with an air inlet connector (6354) on its side for connecting to the internal closed cavity; an air guide groove (6355) is provided on the contact surface of the first cutter body (6352) and the second cutter body (6353); a trimming groove (6356) is provided at one end of the air guide groove (6355); high-pressure airflow is delivered to the air guide groove (6355) and the trimming groove (6356) through the closed cavity inside the first cutter body (6352) and the second cutter body (6353) and ejected.

2. The roll forming equipment according to claim 1, characterized in that: The first trimming unit (63) also includes a suction filter device; the collection tank (636) is a cylindrical structure with a slot, and one side of the slot extends outward with an inclined plate; one end of the collection tank (636) is connected to the inlet of the suction filter device; the suction filter device is used to transport and collect the insulation waste entering the collection tank (636) by suction force.

3. The roll forming equipment according to claim 2, characterized in that: The first trimming unit (63) further includes a spiral conveying mechanism; the spiral conveying mechanism is disposed in the collection groove (636); the spiral conveying mechanism includes a rotating seat (641), a rotating rod (642), a spiral plate (645), elastic wires (646), and a spoke support member (647); the rotating rod (642) is coaxially disposed with the collection groove (636); one end of the rotating rod (642) is rotatably connected to the closed end face of the collection groove (636) through the rotating seat (641); the other end of the rotating rod (642) is rotatably connected to the inner wall of the open end of the collection groove (636) through the spoke support member (647); the spiral plate (645) is fixedly connected to the cylindrical surface of the rotating rod (642); the elastic wires (646) are evenly spaced and fixedly connected to the outer edge of the spiral plate (645).

4. The roll forming equipment according to claim 1, characterized in that: The trimming groove (6356) is a wedge-shaped groove structure, and the tip of the wedge-shaped groove structure is inclined outward.

5. The roll forming equipment according to claim 1, characterized in that: The initial trimming component (5) includes a mounting plate (51), a linear sliding assembly (52), a fixing plate (53), a vertical adjustment mechanism (54), a rolling cutter (55), a hinge seat (56), a support wheel (57), and a connecting plate (58); the mounting plate (51) is fixedly connected to the frame (7); the linear sliding assembly (52) is horizontally arranged on the mounting plate (51); the vertical adjustment mechanism (54) is connected to the linear sliding assembly (52) through the fixing plate (53); The vertical adjustment mechanism (54) is rotatably connected to the rolling cutter (55) via the hinge seat (56); the rolling cutter (55) is a cylindrical roller with a circular blade along the circumferential direction; the support wheel (57) is connected to the hinge seat (56) via the connecting plate (58); the support wheel (57) is rotatably connected to one end of the connecting plate (58); the support of the support wheel (57) ensures that the cut edge of the insulation layer is not torn downwards by its own weight, thus preventing the uncut insulation layer from being torn.

6. The roll forming equipment according to claim 5, characterized in that: The connecting plate (58) is rotatably connected to the hinge seat (56); a vertical stop bar is provided on the connecting plate (58); at least two sets of compression springs (59) are provided between the vertical stop bar and the side of the support plate of the hinge seat (56).

7. The roll forming equipment according to claim 6, characterized in that: The side of the rolling cutter (55) is fixedly connected to the transmission pulley (551); the transmission pulley (551) and the support wheel (57) are synchronously driven by the synchronous belt (552), and the two have the same rotation speed.

8. The roll forming equipment according to claim 5, characterized in that: The cylindrical surface of the support wheel (57) is roughened.

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