A battery separator shaping device

Abstract

The present invention belongs to the technical field of battery diaphragm production, and in particular to a shaping device for battery diaphragms. Aiming at the problem that uneven extension under the same pulling force is caused by uneven cooling of the base film during the stretching process, the following scheme is proposed, including a processing box with a cavity in a rectangular structure, the vertical side walls on both sides of the processing box are provided with rectangular holes of the same height, one is a feed port and the other is a discharge port, a strip hole is provided above the feed port, and a shaft is rotatably connected to the bottom inner wall of the processing box near the feed port. The present invention can clamp the extruded base film while performing a swinging pull when the extruder is working, avoiding the traditional pulling in the same direction with a constant pulling force that cannot overcome temporary resistance. This pulling method can effectively avoid the pulling jam caused by temporary changes in resistance caused by temperature differences or other factors during pulling.

Description

Technical Field

[0001] The invention relates to the technical field of battery separator production, and in particular to a battery separator shaping device. Background Art

[0002] In the production process of battery separators, the pretreated raw materials are melted and plasticized in the extrusion system and then extruded from the die. The melt is cast to form a base film with a specific crystal structure. The base film is then heat-treated and shaped. Generally, inorganic or organic materials are coated on it to improve the dimensional stability at high temperatures, such as the aramid coated separator used in Tesla batteries and the Al2O3 coating used in batteries of many domestic manufacturers. Existing technology for improving the thermal shrinkage of the base film: from the material aspect, high and low molecular weight ultra-high molecular weight polyethylene is mainly used to improve the strength of the separator while stabilizing the high temperature performance.

[0003] However, due to the presence of various polyethylenes, the consistency of the twin-screw mixing process is poor, and the twin-screw extrusion load varies greatly, resulting in poor extrusion consistency; when the stretcher controls the width during the stretching process, it will cause large changes in tension, uneven stretching, slow stretching speed, etc., which will lead to reduced production speed and decreased consistency of the diaphragm. Summary of the invention

[0004] In order to overcome the problem in the prior art that uneven cooling of a base film during a stretching process causes uneven extension under the same tension, the present invention provides a shaping device for a battery separator.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a shaping device for battery diaphragm, comprising a processing box with a cavity in a rectangular parallelepiped structure, the vertical side walls on both sides of the processing box are provided with rectangular holes of the same height, one is a feed port and the other is a discharge port, a strip hole is provided above the feed port, the bottom inner wall of the processing box is rotatably connected to an axle rod near the feed port, and the two ends of the axle rod are respectively sleeved with C-shaped steel slide rails with openings opposite to each other and parallel to each other, and the two C-shaped steel slide rails are rotatably connected near the middle. Two lower clamping rollers and an upper clamping roller are connected to each other, and U-shaped clamping plates are fixed between the two ends of the upper clamping roller and the lower clamping roller, an H-shaped steel beam is fixed between the top ends of the two C-shaped steel slide rails, and a push rod motor is fixed between the H-shaped steel beam and the U-shaped clamping plate, compression springs are arranged on the lower surface of the U-shaped clamping plate near the bottom end near both ends, and the same support plate is fixed to the bottom end of the compression spring, a connecting rod is rotatably connected to one side of the H-shaped steel beam near the strip hole, and the connecting rod is hinged with a cam through the strip hole, and a flywheel is fixed to the back of the cam.

[0006] As a preferred solution in the present invention, the width of the rectangular hole is greater than the width of the diaphragm belt, and the height of the feed port is greater than the height of the discharge port, and a gap is left between the inner wall of the feed port and the diaphragm belt.

[0007] As a preferred solution in the present invention, an intermediate roller is provided near the middle between the vertical inner walls on both sides of the processing box away from the rectangular hole, and a pair of mutually intermeshing lead-out rollers are provided near the discharge port.

[0008] As a preferred solution in the present invention, a fan is fixed on the inner wall of the processing box near the upper side of the discharge port, and air guide plates distributed equidistantly are fixed at the air outlet of the fan, and the wind direction of the air guide plates is toward the surface of the diaphragm belt base film.

[0009] As a preferred solution in the present invention, square tube seats are fixed on the upper and lower sides of the diaphragm between the inner walls of both sides of the processing box close to the outlet end, and mounting holes are opened in the middle and two sections of the opposite sides of the two square tube seats, and the mounting holes are clamped with trigger mechanisms with their openings facing the diaphragm belt.

[0010] As a preferred solution in the present invention, the trigger mechanism includes a fixed barrel with an opening toward the middle, an inner sliding rod is slidably connected to the inside of the fixed barrel, and rollers and spring grooves are respectively fixed at the upper and lower ends of the inner sliding rod, a buffer spring is fixed in the spring groove, and a pressure sensor is fixed at one end of the buffer spring away from the inner sliding rod, and a reset spring is fixed between the inner sliding rod and the bottom of the fixed barrel.

[0011] As a preferred solution in the present invention, two groups of pressure roller frames are arranged in the middle part of the processing box near the top of the middle roller, and each group of pressure roller frames includes two inclined slide rails with openings facing each other, and roller one and roller two are rotatably connected between the bottom ends of the two inclined slide rails, and the middle diameter of roller one is smaller than the diameter at both ends, and the diameter at both ends of roller two is larger than the middle diameter.

[0012] As a preferred solution in the present invention, a first adjusting roller is slidably connected above the roller one, and the diameter of the middle part of the first adjusting roller is larger than the diameter at both ends; a second adjusting roller is slidably connected above the roller two, and the outer walls of the roller bodies of the first adjusting roller and the second adjusting roller are both provided with equally spaced pressure edges, and the diameter of the pressure edges is equal to one twentieth of the diameter of the first adjusting roller.

[0013] As a preferred solution in the present invention, a bow-shaped pressure rod is fixed to the top of each of the first adjusting roller and the second adjusting roller, and a push rod motor is fixed to the top of the bow-shaped pressure rod.

[0014] In summary, the beneficial effects of this solution are:

[0015] 1. This battery separator shaping device, by setting two swinging C-shaped steel slide rails and two interlocking clamping rollers between them, can clamp the extruded base film while swinging and pulling it when the extruder is working, avoiding the traditional pulling in the same direction with a constant pulling force that cannot overcome temporary resistance. This pulling method can effectively avoid the pulling jam caused by temporary changes in resistance caused by temperature difference or other factors during pulling;

[0016] 2. The battery diaphragm shaping device can provide sufficient cooling space for the pulled base film during use by setting the intermediate roller and the outlet roller, so as to perform shaping treatment on it and ensure the surface quality and internal quality of the pulled diaphragm belt are intact;

[0017] 3. The shaping device of the battery separator can increase the friction between the battery separator and the base film during use by means of the pressing edge embedded in the outer wall of the adjusting roller, thereby tightly pressing the base film to stretch it;

[0018] 4. The shaping device of this battery diaphragm, by setting adjusting rollers with different diameters at both ends, can adjust the extension rod of the push rod motor to extend when the thickness of the base film changes during use, thereby driving the first adjusting roller and the second adjusting roller to descend at the same time, so as to increase the calendering of the base film and make the extension of the base film tend to be consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic cross-sectional view of a battery separator shaping device proposed by the present invention;

[0020] Figure 2 This is a structural schematic diagram of a swinging and pulling mechanism of a battery separator shaping device proposed by the present invention;

[0021] Figure 3 A schematic diagram of the structure of a second adjusting roller of a battery separator shaping device proposed by the present invention;

[0022] Figure 4 This is a schematic structural diagram of a first adjusting roller of a battery separator shaping device proposed by the present invention;

[0023] Figure 5 A battery separator shaping device proposed by the present invention Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0024] In the figure: 1 processing box, 101 rectangular hole, 2 push rod motor, 3 first adjusting roller, 4 inclined slide rail, 401 bow pressure rod, 5 roller one, 6 strip hole, 7 connecting rod, 8 cam, 9 flywheel, 10 shaft rod, 11 lower clamping roller, 1101 compression spring, 12 upper clamping roller, 13 electric push rod, 14 C-shaped steel slide rail, 15 trigger mechanism, 1501 reset spring, 1502 pressure sensor, 1503 inner slide rod, 16 square tube seat, 17 export roller, 18 fan, 19 air guide plate, 20 roller two, 21 second adjusting roller, 2101 pressure edge. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Example 1

[0028] Reference Figure 1-5A shaping device for battery separators comprises a processing box 1 with a cavity in a rectangular parallelepiped structure, rectangular holes 101 of the same height are opened on the vertical side walls of the processing box 1 on both sides opposite to each other, one is a feed port and the other is a discharge port, a strip hole 6 is opened above the feed port, a shaft 10 is rotatably connected to the bottom inner wall of the processing box 1 near the feed port, and the two ends of the shaft 10 are respectively sleeved with C-shaped steel slide rails 14 with openings facing each other and parallel to each other, two lower clamping rollers 11 and upper clamping rollers 12 are rotatably connected between the two C-shaped steel slide rails 14 near the middle, and U-shaped clamping plates are fixed between the two ends of the upper clamping roller 12 and the lower clamping roller 11, and an H-shaped steel beam is fixed between the tops of the two C-shaped steel slide rails 14 , and a push rod motor 2 is fixed between the H-shaped steel beam and the U-shaped card plate, compression springs 1001 are arranged near both ends of the lower surface of the U-shaped card plate near the bottom end, and the bottom end of the compression spring 1101 is fixed to the same support plate, and a connecting rod 7 is rotatably connected to one side of the H-shaped steel beam near the strip hole 6, and the connecting rod 7 passes through the strip hole 6 and is hinged with a cam 8, and a flywheel 9 is fixed to the back of the cam 8, so that the extruded base film can be clamped and pulled in a swinging manner when the extruder is working, avoiding the traditional pulling in the same direction with a constant pulling force that cannot overcome temporary resistance. This pulling method can effectively avoid the pulling jam caused by temporary changes in resistance caused by temperature difference or other factors during pulling.

[0029] In the present invention, the width of the rectangular hole 101 is greater than the width of the diaphragm belt, and the height of the feed port is greater than the height of the discharge port. A gap is left between the inner wall of the feed port and the diaphragm belt to prevent the diaphragm belt from contacting the side wall of the processing box 1 when swinging up and down.

[0030] Among them, an intermediate roller is arranged near the middle between the vertical inner walls on both sides of the processing box 1 away from the rectangular hole 101, and a pair of mutually interlocking lead-out rollers 17 are arranged near the discharge port, so that sufficient cooling space can be provided for the pulled base film during use to perform shaping treatment on it, thereby ensuring that the surface quality and internal quality of the pulled diaphragm belt are intact.

[0031] Among them, a fan 18 is fixed on the inner wall of the processing box 1 near the upper part of the discharge port, and air guide plates 19 distributed equidistantly are fixed at the air outlet of the fan 18. The wind direction of the air guide plates 19 is toward the surface of the diaphragm belt base film to quickly shape and cool the surface.

[0032] Among them, square tube seats 16 are fixed on the upper and lower sides of the diaphragm between the inner walls of the two sides of the processing box 1 near the outlet end, and installation holes are opened in the middle and two sections of the opposite side of the two square tube seats 16, and the installation holes are clamped with trigger mechanisms 15 with openings facing the diaphragm belt.

[0033] Among them, the trigger mechanism 15 includes a fixed barrel with an opening toward the middle, an inner slide rod 1503 is slidably connected inside the fixed barrel, and rollers and spring grooves are respectively fixed at the upper and lower ends of the inner slide rod 1503, a buffer spring is fixed in the spring groove, and a pressure sensor is fixed at one end of the buffer spring away from the inner slide rod 1503, and a reset spring 1501 is fixed between the inner slide rod 1503 and the bottom of the fixed barrel.

[0034] Among them, two groups of roller frames are arranged in the middle part of the processing box 1 near the top of the middle roller, and each group of roller frames includes two inclined slide rails 4 with openings facing each other. Roller 1 5 and roller 2 20 are rotatably connected between the bottom ends of the two inclined slide rails 4. The middle diameter of roller 1 5 is smaller than the diameter at both ends, and the diameter at both ends of roller 2 20 is larger than the middle diameter.

[0035] Among them, the first adjusting roller 3 is slidably connected above the roller 1 5, and the diameter of the middle part of the first adjusting roller 3 is larger than the diameter of the two ends. The second adjusting roller 21 is slidably connected above the roller 20, and the outer walls of the roller bodies of the first adjusting roller 3 and the second adjusting roller 21 are both provided with equidistantly distributed pressure edges 2101, and the diameter of the pressure edges 2101 is equal to one twentieth of the diameter of the first adjusting roller 3. The set pressure edges 2101 can increase the friction between the base film and the base film during use, thereby being able to tightly press the base film to stretch it.

[0036] Among them, the top ends of the first adjusting roller 3 and the second adjusting roller 21 are both fixed with a bow-shaped pressure rod 401, and the top end of the bow-shaped pressure rod 401 is fixed with a push rod motor 2, so that when the thickness of the base film changes during use, the extension rod of the push rod motor 2 can be adjusted to extend, thereby driving the first adjusting roller 3 and the second adjusting roller 21 to descend at the same time, so as to increase the calendering of the base film and make the extension of the base film tend to be consistent.

[0037] Working principle: when the extruder is working, the head of the extruded base film is first passed through the feed port - the gap between the upper clamping roller 12 and the lower clamping roller 11 - the gap between the first adjusting roller 3 and the roller 1 5 - the gap between the second adjusting roller 21 and the roller 2 20 - the middle roller - between the two square tube seats 16 - the gap between the two lead-out rollers 17 - the discharge port; then the flywheel 9 is driven to rotate, and at this time, the two C-shaped steel slide rails 14 are driven to swing around the shaft 10 under the action of the cam 8 and the connecting rod 7, and the swing-type pulling is performed while clamping, so as to avoid the traditional pulling in the same direction with a constant pulling force that cannot overcome the temporary resistance. This pulling method can effectively avoid the pulling jam caused by the temporary change of resistance caused by temperature difference or other factors during pulling.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A shaping device for battery separators, comprising a processing box (1) with a cavity therein and a rectangular parallelepiped structure, wherein the processing box (1) has two vertical side walls opposite to each other with rectangular holes (101) of the same height, one being a feed port and the other being a discharge port, and a strip hole (6) being formed above the feed port, characterized in that: The bottom inner wall of the processing box (1) is rotatably connected to a shaft rod (10) at an angle below the feed port, and the two ends of the shaft rod (10) are respectively sleeved with C-shaped steel slide rails (14) with openings facing each other and parallel to each other. Two lower clamping rollers (11) and an upper clamping roller (12) are rotatably connected between the two C-shaped steel slide rails (14) near the middle, and a U-shaped clamping plate is fixed between the two ends of the upper clamping roller (12) and the lower clamping roller (11). An H-shaped steel beam is fixed between the top ends of the two C-shaped steel slide rails (14), and the H-shaped steel beam and the U-shaped A push rod motor (2) is fixed between the card plates, and compression springs (1101) are arranged near both ends of the lower surface of the U-shaped card plate near the bottom end, and the same supporting plate is fixed to the bottom end of the compression spring (1101). A connecting rod (7) is rotatably connected to the side of the H-shaped steel beam near the strip hole (6), and the connecting rod (7) passes through the strip hole (6) and is hinged with a cam (8), and a flywheel (9) is fixed on the back of the cam (8). An intermediate roller is arranged near the middle between the vertical inner walls on both sides of the processing box (1) away from the rectangular hole (101), and a A pair of mutually interlocking outlet rollers (17) are arranged, a fan (18) is fixed on the inner wall of the processing box (1) near the upper part of the discharge port, and air guide plates (19) are fixed at equal distances at the air outlet of the fan (18), and the wind direction of the air guide plates (19) is toward the surface of the base film of the diaphragm belt. Two groups of pressure roller frames are arranged in the middle part of the processing box (1) near the upper part of the middle roller, and each group of pressure roller frames includes two inclined slide rails (4) with openings facing each other, and the bottom ends of the two inclined slide rails (4) are rotatably connected with a roller one (5) and a roller two (20), respectively. The middle diameter of roller one (5) is smaller than the diameters at both ends, and the diameters at both ends of roller two (20) are larger than the middle diameter. A first adjusting roller (3) is slidably connected to the top of roller one (5), and the diameter of the middle part of the first adjusting roller (3) is larger than the diameters at both ends. A second adjusting roller (21) is slidably connected to the top of roller two (20), and the outer walls of the roller bodies of the first adjusting roller (3) and the second adjusting roller (21) are both provided with equally spaced pressure edges (2101), and the diameter of the pressure edges (2101) is equal to one twentieth of the diameter of the first adjusting roller (3).

2. A battery separator shaping device according to claim 1, characterized in that: The width of the rectangular hole (101) is greater than the width of the diaphragm belt, and the height of the feed port is greater than the height of the discharge port, and a gap is left between the inner wall of the feed port and the diaphragm belt.

3. A battery separator shaping device according to claim 1, characterized in that: Square tube seats (16) are fixed on both sides of the inner walls of the treatment box (1) near the upper and lower sides of the outlet end diaphragm, and installation holes are opened in the middle and two sections of the opposite sides of the two square tube seats (16), and the installation holes are clamped with a trigger mechanism (15) with an opening facing the diaphragm belt.

4. A battery separator shaping device according to claim 3, characterized in that: The trigger mechanism (15) comprises a fixed barrel with an opening toward the middle, an inner slide bar (1503) is slidably connected inside the fixed barrel, and rollers and spring grooves are respectively fixed at the upper and lower ends of the inner slide bar (1503), a buffer spring is fixed in the spring groove, and a pressure sensor is fixed at one end of the buffer spring away from the inner slide bar (1503), and a reset spring (1501) is fixed between the inner slide bar (1503) and the barrel bottom of the fixed barrel.

5. A battery separator shaping device according to claim 1, characterized in that: A bow-shaped pressure rod (401) is fixed to the top of each of the first adjustment roller (3) and the second adjustment roller (21), and a push rod motor (2) is fixed to the top of each of the bow-shaped pressure rods (401).

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