A lithium battery diaphragm extension device

Abstract

The present invention relates to the field of lithium battery diaphragm production, and in particular to a lithium battery diaphragm extension device, comprising two assembly plates, a bottom plate welded between the two side walls of the assembly plates, a folding platform welded on the top of the bottom plate, curved panels welded on the outer walls on both sides of the folding platform, a plurality of support plates welded on the top of the bottom plate, a gear ring is rotatably connected between the tops of every four support plates, a plurality of slide bars are welded on the top of each gear ring, and a mounting frame is slidably arranged between every two slide bars. The two sides of the diaphragm will fold upward along the upper surface of the curved panel during the sliding process, and the arranged mounting frame will drive the two clamping blocks to gradually approach the folded side of the diaphragm, and the two clamping blocks move towards each other and fixedly clamp the folded side of the diaphragm; as the two clamping blocks continue to rotate, the width of the diaphragm is stretched, thereby realizing continuous lateral extension of the diaphragm.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery diaphragm production, and in particular to a lithium battery diaphragm extending device. Background Art

[0002] The primary function of lithium-ion battery separators is to separate the positive and negative electrodes of a battery, preventing short circuits and allowing the free passage of lithium ions during charging and discharging. With the continuous advancement of materials science, separator materials have evolved from a single material to a composite of multiple high-performance materials. Currently, the mainstream separator materials on the market include polyethylene and polypropylene, each of which exhibits excellent tensile properties and chemical stability. In addition, new materials such as ceramic separators and nanoporous separators are under development. These materials offer higher ionic conductivity and mechanical strength, promising to further enhance lithium-ion battery performance. With the global emphasis on sustainable development and environmental protection, and the rapid development of new energy vehicles and energy storage systems, the demand for lithium-ion batteries has increased dramatically. As a key material in lithium-ion batteries, the market demand for separators has also grown accordingly. In the power battery sector, in particular, separator performance requirements are becoming increasingly stringent, such as higher energy density, longer cycle life, and improved safety. Current separator stretching equipment is generally limited to stretching the separator to a specific size. Adjusting the stretched separator size requires disassembly, adjustment, and reassembly of the clamping ends, a time-consuming and labor-intensive process. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the background technology and to propose a lithium battery diaphragm extension device.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a lithium battery diaphragm extension device, comprising two assembly plates, a bottom plate welded between the two side walls of the assembly plates, a folding platform welded on the top of the bottom plate, curved plates welded on the outer walls of both sides of the folding platform, a plurality of support plates welded on the top of the bottom plate, a gear ring is rotatably connected between the tops of every four support plates, a plurality of slide rods 1 are welded on the top of each gear ring, a mounting bracket is slidably provided between every two slide rods 1, a roller is rotatably connected to the top of each mounting bracket, a slide rod 2 is welded on the side wall of each mounting bracket, two vertical plates are slidably provided on the outer peripheral wall of each slide rod 2, and an abutment rod is welded on the side wall of each vertical plate. A clamping block is welded to the bottom of each vertical plate, and two assembly columns are welded to the top of the bottom plate. A Z-shaped ring plate is welded to the outer peripheral wall of each assembly column through several connecting rods, and several rollers are abutted against the bottom of the Z-shaped ring plate. Two fixed inner rings and two fixed outer rings are welded to the top of the bottom plate, and several movable inner rings and movable outer rings are provided on the top of the bottom plate. The two sides of the diaphragm will fold upward along the upper surface of the curved plate during the sliding process, and the installed mounting frame will drive the two clamping blocks to gradually approach the folded sides of the diaphragm, and the two clamping blocks move towards each other and fixedly clamp the folded sides of the diaphragm; as the two clamping blocks continue to rotate, the width of the diaphragm is stretched, thereby realizing continuous lateral extension of the diaphragm.

[0005] In the above-mentioned lithium battery diaphragm extension device, an electric feed roller and an electric discharge roller are installed between the two assembly plates, two support frames are welded on the side walls of the two assembly plates, and a pressure strip is welded between the bottoms of each two support frames. Two motors are fixedly installed on the top of the bottom plate, and a transmission gear is fixedly installed on the top output end of each motor, and the two transmission gears are respectively engaged with two gear rings. Several shaping rollers are rotatably connected between the two assembly plates, and the several shaping rollers are arranged alternately up and down. An extension platform is welded between the side walls of the two assembly plates, and a mounting plate is welded between the tops of the two assembly plates. Two electric push rods are fixedly installed on the bottom of the mounting plate, and two A pressure plate is fixedly installed between the telescopic ends at the bottom of the electric push rod, and the electric feed roller serves as the initial power source to transport the diaphragm to the top of the folding table. The set motor drives the transmission gear to rotate, and the set transmission gear drives the gear ring to rotate. The diaphragm that has completed the horizontal extension will pass through several shaping rollers. Since the diaphragm will shrink to a certain extent after the horizontal extension, the set shaping rollers can shape the horizontally extended diaphragm; then, the diaphragm that has completed the horizontal extension is moved to the electric discharge roller, and the set electric push rod drives the pressure plate to move downward and presses the diaphragm that has completed the horizontal extension on the top of the extension table, and then the set electric discharge roller rotates to longitudinally stretch the diaphragm that has completed the horizontal extension.

[0006] In the above-mentioned lithium battery diaphragm stretching device, the bottom of the pressure strip is rotatably connected to a plurality of sliding wheels. The sliding wheels reduce the friction between the pressure strip and the diaphragm, thereby reducing the probability of wrinkles on the diaphragm during the sliding process.

[0007] In the above-mentioned lithium battery diaphragm extension device, two mounting grooves are provided on the side wall of the clamping block, and the inner walls of the two mounting grooves are rotatably connected to a rotating rod 2, and the outer peripheral walls of the two rotating rods are welded with a flip block, and the tops of the two rotating rods are welded with a driven gear, and the tops of the clamping blocks are rotatably connected to a rotating rod 1, and the outer peripheral walls of the two rotating rods 1 are welded with a driving gear and a connecting plate 1, and the tops of the two rotating rods 1 are welded with an abutment plate, and two connecting plates 2 are welded on the top of the clamping block. The flip block flips out of the mounting groove and clamps on the folded side of the diaphragm, thereby switching the multi-point clamping of the side of the diaphragm of this device to surface clamping. By increasing the clamping area between this device and the side of the diaphragm, the diaphragm is not easily separated from the clamping end of the device during the extension process. The increased clamping area can also cover the gap between adjacent clamping ends, so that the side of the diaphragm is extended more evenly.

[0008] In the above-mentioned lithium battery diaphragm extension device, several oblique rods are welded on the side wall of the flip block, and a slider is slidably arranged between every two of the oblique rods. During the process of the diaphragm side being stretched and extended, a downward reaction force will be given to the slider. The slider subjected to the reaction force will slide downward along the oblique rod. Since the oblique rod is set obliquely, the two sliders will gradually approach each other when sliding down, thereby increasing the clamping force of the slider on the side of the diaphragm, which further reduces the probability of the side of the diaphragm falling off.

[0009] In the above-mentioned lithium battery diaphragm extension device, several mounting frames are welded on the outer peripheral wall of the assembly column through connecting rods, and a two-way screw is rotatably connected to the side wall of each mounting frame, and a threaded plate 1 and a threaded plate 2 are threadedly connected to the outer peripheral wall of each two-way screw, and several threaded plates 1 are welded to several movable inner rings in a one-to-one correspondence, and several two-way screws are welded to several movable outer rings in a one-to-one correspondence. When the extension width of the diaphragm needs to be changed, the staff can rotate it by twisting the two-way screw. The rotating two-way screw drives the threaded plate 1 and the threaded plate 2 to move in opposite directions, so that the clamping block is reset in advance under the elastic force of spring 2, thereby shortening the extension width of the diaphragm. By twisting multiple sets of two-way screws for rotation, multi-level adjustment of the diaphragm extension width can be achieved.

[0010] In the above-mentioned lithium battery diaphragm extension device, a limiting rod is welded between the two side walls of the mounting frame, and thread plate 1 and thread plate 2 are slidably arranged on the outer peripheral wall of the limiting rod. The set limiting rod can limit and constrain thread plate 1 and thread plate 2 during the movement process.

[0011] In the above-mentioned lithium battery diaphragm extension device, a spring 1 is wound around the outer peripheral wall of the sliding rod 1, and the spring 1 is connected between the mounting frame and the spring 1, a spring 2 is wound around the outer peripheral wall of the abutting rod, and the spring 2 is connected between the vertical plate and the mounting frame, a spring 3 is connected between the connecting plate 2 and the connecting plate 1, a spring 4 is wound around the outer peripheral wall of the oblique rod, and the spring 4 is connected between the slider and the flip block, the spring 1 can drive the mounting frame and the clamping block to reset upward, the spring 2 can drive the clamping block to reset to both sides, the spring 3 can drive the flip block to reset into the mounting groove, and the spring 4 can drive the slider to reset upward.

[0012] Compared with existing technologies, the advantages of this moisture-proof distribution cabinet are:

[0013] 1. As the diaphragm slides, its two sides fold upward along the upper surface of the curved plate. The mounting frame drives the two clamping blocks to gradually approach the folded sides of the diaphragm. The two clamping blocks move toward each other and securely clamp the folded sides of the diaphragm. As the two clamping blocks continue to rotate, the width of the diaphragm is stretched, thereby achieving continuous lateral extension of the diaphragm.

[0014] 2. The flip block flips out of the installation slot and clamps on the folded side of the diaphragm, thereby switching the multi-point clamping of the diaphragm side to surface clamping. By increasing the clamping area between the device and the diaphragm side, the diaphragm is less likely to fall off from the clamping end of the device during the extension process. The increased clamping area can also cover the gap between adjacent clamping ends, making the extension of the diaphragm side more uniform.

[0015] 3. When the diaphragm side is stretched and extended, a downward reaction force is exerted on the slider. The slider, subjected to the reaction force, slides downward along the diagonal rod. Since the diagonal rod is set at an angle, the two sliders gradually move closer together as they slide down, thereby increasing the clamping force of the slider on the diaphragm side, which further reduces the probability of the diaphragm side falling off.

[0016] 4. When the extension width of the diaphragm needs to be changed, the staff can rotate it by twisting the bidirectional screw. The rotating bidirectional screw drives the threaded plate 1 and the threaded plate 2 to move in opposite directions, so that the clamping block is reset in advance under the elastic force of the spring 2, thereby shortening the extension width of the diaphragm. By twisting and rotating multiple sets of bidirectional screws, multi-level adjustment of the diaphragm extension width can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a lithium battery diaphragm extension device proposed by the present invention;

[0018] Figure 2 This is a schematic structural diagram of the folding table of the present invention;

[0019] Figure 3 Schematic diagram of the gear ring structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the clamping block of the present invention;

[0021] Figure 5 This is a schematic diagram of the flip block structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the oblique rod structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the Z-shaped ring plate structure of the present invention;

[0024] Figure 8 Schematic diagram of the bidirectional screw structure of the present invention;

[0025] Figure 9 Schematic diagram of the structure of the fixed inner ring and the fixed outer ring of the present invention;

[0026] Figure 10 It is a schematic diagram of the abutment plate structure of the present invention.

[0027] In the figure: 1. Assembly plate; 2. Curved plate; 3. Folding table; 4. Electric feed roller; 5. Pressing bar; 6. Z-shaped ring plate; 7. Assembly column; 8. Shaping roller; 9. Mounting plate; 10. Electric push rod; 11. Pressing plate; 12. Extension table; 13. Electric discharge roller; 14. Sliding wheel; 15. Ring gear; 16. Transmission gear; 17. Motor; 18. Support plate; 19. Vertical plate; 20. Clamping block; 21. Mounting frame; 22. Roller; 23. Sliding rod 2; 24. Spring 2; 25. Abutment rod; 26. Abutment plate; 27. 1. Slide rod; 28. Spring; 29. ​​Turn rod; 30. Flip block; 31. Mounting slot; 32. Connecting plate; 33. Driving gear; 34. Driven gear; 35. Turn rod; 36. Slider; 37. Bevel rod; 38. Spring; 49. Fixed inner ring; 40. Fixed outer ring; 41. Bidirectional screw; 42. Mounting frame; 43. Threaded plate; 44. Movable outer ring; 45. Bottom plate; 46. Movable inner ring; 47. Limit rod; 48. Support frame; 49. Connecting plate; 50. Spring; 51. Threaded plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0030] Reference Figures 1-10 A lithium battery diaphragm stretching device includes two assembly plates 1, an electric feed roller 4 and an electric discharge roller 13 are installed between the two assembly plates 1, a bottom plate 45 is welded between the side walls of the two assembly plates 1, a folding platform 3 is welded on the top of the bottom plate 45, and curved plates 2 are welded on the outer walls of both sides of the folding platform 3. The electric feed roller 4 serves as the initial power source to transport the diaphragm to the top of the folding platform 3, and then the diaphragm slides along the folding platform 3 and the upper surface of the two curved plates 2. Since the upper surface of the curved plate 2 is a gradually curved structure, The two sides of the diaphragm will be folded upward along the upper surface of the curved plate 2 during the sliding process; two support frames 48 are welded on the side walls of the two assembly plates 1, and a pressure strip 5 is welded between the bottom of each two support frames 48. The bottom of the pressure strip 5 is rotatably connected to several sliding wheels 14. The pressure strip 5 can limit the upward folded part of the diaphragm, thereby enhancing the stability of the two sides of the diaphragm after folding. The sliding wheels 14 reduce the friction between the pressure strip 5 and the diaphragm, thereby reducing the probability of wrinkles on the diaphragm during sliding.

[0031] Furthermore, two motors 17 are fixedly installed on the top of the bottom plate 45, and a transmission gear 16 is fixedly installed on the output end of the top of each motor 17. Several support plates 18 are welded on the top of the bottom plate 45. A gear ring 15 is rotatably connected between the tops of every four support plates 18, and the two transmission gears 16 are respectively engaged with the two gear rings 15. The motor 17 drives the transmission gear 16 to rotate, and the transmission gear 16 drives the gear ring 15 to rotate; a plurality of slide bars 27 are welded on the top of each gear ring 15, and a mounting frame 21 is slidably provided between every two slide bars 27. The top of each mounting frame 21 is rotatably connected to a roller 22, and a slide bar 23 is welded on the side wall of each mounting frame 21. Two vertical plates 19 are slidably provided on the outer peripheral wall of each slide bar 23. Abutment rods 25 are welded on the side walls of the plate 19, and a clamping block 20 is welded at the bottom of each vertical plate 19. Two assembly columns 7 are welded on the top of the bottom plate 45. A Z-shaped ring plate 6 is welded on the outer peripheral wall of each assembly column 7 through several connecting rods, and several rollers 22 abut against the bottom of the Z-shaped ring plate 6. The set mounting frame 21 will gradually move downward along the trajectory of the Z-shaped ring plate 6 when sliding over the Z-shaped ring plate 6. The set mounting frame 21 will drive the sliding rod 23, the vertical plate 19 and the clamping block 20 to move downward, thereby making the two clamping blocks 20 gradually approach the side of the folded diaphragm; wherein, a spring 28 is wound around the outer peripheral wall of the sliding rod 1 27, and the spring 1 28 is connected between the mounting frame 21 and the spring 1 28. The set spring 1 28 can drive the mounting frame 21 and the clamping block 20 to reset upward.

[0032] Furthermore, two fixed inner rings 39 and two fixed outer rings 40 are welded to the top of the bottom plate 45, and a plurality of movable inner rings 46 and movable outer rings 44 are provided on the top of the bottom plate 45. The provided mounting frame 21 drives the slide bar 23, the vertical plate 19 and the abutment rod 25 to rotate, and the provided fixed inner ring 39 and the fixed outer ring 40 are narrowed toward the middle, and the two abutment rods 25 are away from each other and abut on the side walls of the fixed inner ring 39 and the fixed outer ring 40, respectively, so that the two abutment rods 25 are in contact with each other. When passing through the narrowed area of ​​the fixed inner ring 39 and the fixed outer ring 40, they will move towards each other, and the two abutment rods 25 will respectively drive the two vertical plates 19 and the two clamping blocks 20 to move, so that the two clamping blocks 20 move towards each other and achieve fixed clamping of the folded sides of the diaphragm; wherein, a spring 24 is wound around the outer peripheral wall of the abutment rod 25, and the spring 24 is connected between the vertical plate 19 and the mounting frame 21, and the set spring 24 can drive the clamping blocks 20 to reset to both sides.

[0033] Furthermore, two mounting grooves 31 are provided on the side wall of the clamping block 20, and the inner walls of the two mounting grooves 31 are rotatably connected to the rotating rods 2 35, and the outer peripheral walls of the two rotating rods 2 35 are welded with the flip blocks 30, and the tops of the two rotating rods 2 35 are welded with the driven gears 34, and the tops of the clamping blocks 20 are rotatably connected to the rotating rods 1 29, and the outer peripheral walls of the two rotating rods 1 29 are welded with the driving gear 33 and the connecting plate 1 32, and the tops of the two rotating rods 1 29 are welded with the abutment plates 26, and the tops of the clamping blocks 20 are welded with two connecting plates 2 49. The abutment plates 26 set will deflect to a certain extent when passing through the narrowed area of ​​the fixed inner ring 39 and the fixed outer ring 40, and the abutment plates 26 set will bring The movable rotating rod 29 rotates, and the rotating rod 29 drives the driving gear 33 and the driven gear 34 to rotate. Since the number of teeth of the driving gear 33 is greater than the number of teeth of the driven gear 34, the driving gear 33 drives the driven gear 34 to rotate at an accelerated speed, and the driven gear 34 drives the rotating rod 2 35 and the flip block 30 to rotate, so that the flip block 30 flips out of the mounting groove 31 and is clamped on the folded side of the diaphragm, thereby switching the multi-point clamping of the diaphragm side by this device to surface clamping; wherein, a spring 3 50 is connected between the connecting plate 2 49 and the connecting plate 1 32, and the spring 3 50 can drive the flip block 30 to return to the mounting groove 31.

[0034] Furthermore, a number of inclined rods 37 are welded to the side wall of the flip block 30, and a slider 36 is slidably arranged between every two inclined rods 37. When the flip block 30 clamps the side of the diaphragm, the slider 36 located on the side wall of the flip block 30 also clamps the side of the diaphragm. In the process of the diaphragm side being stretched and extended, a downward reaction force is given to the slider 36. The slider 36 subjected to the reaction force will slide downward along the inclined rod 37. Since the inclined rod 37 is arranged obliquely, the two sliders 36 will gradually approach each other when sliding down, thereby increasing the clamping force of the slider 36 on the side of the diaphragm; wherein, a spring four 38 is wound around the outer peripheral wall of the inclined rod 37, and the spring four 38 is connected between the slider 36 and the flip block 30. The set spring four 38 can drive the slider 36 to reset upward.

[0035] Furthermore, a plurality of mounting frames 42 are welded on the outer peripheral wall of the assembly column 7 through a connecting rod, and a bidirectional screw rod 41 is rotatably connected to the side wall of each mounting frame 42, and a threaded plate 1 51 and a threaded plate 2 43 are threadedly connected to the outer peripheral wall of each bidirectional screw rod 41, and a plurality of threaded plates 1 51 are welded to a plurality of movable inner rings 46 in a one-to-one correspondence, and a plurality of bidirectional screw rods 41 are welded to a plurality of movable outer rings 44 in a one-to-one correspondence. When the extension width of the diaphragm needs to be changed, the staff can rotate it by twisting the bidirectional screw rod 41, and the rotating bidirectional screw rod 41 drives the threaded plate 1 51 and the threaded plate 2 43 to move in opposite directions, so that the clamping block 20 is reset in advance under the elastic force of the spring 2 24, thereby shortening the extension width of the diaphragm, and rotating by twisting multiple sets of bidirectional screws 41 to achieve multi-level adjustment of the extension width of the diaphragm; wherein, a limiting rod 47 is welded between the two side walls of the mounting frame 42, and the threaded plate 1 51 and the threaded plate 2 43 are slidably arranged on the outer peripheral wall of the limiting rod 47, and the set limiting rod 47 can limit and constrain the threaded plate 1 51 and the threaded plate 2 43 during the movement process.

[0036] Furthermore, a number of shaping rollers 8 are rotatably connected between the two assembly plates 1, and the shaping rollers 8 are alternately arranged up and down. Since the diaphragm will shrink to a certain extent after being laterally stretched, the set shaping rollers 8 can shape the laterally stretched diaphragm, so as to reduce the probability of the diaphragm shrinking after being laterally stretched; an extension platform 12 is welded between the side walls of the two assembly plates 1, and a mounting plate 9 is welded between the tops of the two assembly plates 1. Two electric push rods 10 are fixedly installed on the bottom of the mounting plate 9, and a pressure plate 11 is fixedly installed between the telescopic ends of the bottom of the two electric push rods 10. The diaphragm that has completed the laterally extension is moved to the electric discharge roller 13, and the set electric push rod 10 drives the pressure plate 11 to move downward and presses the diaphragm that has completed the laterally extension on the top of the extension platform 12, and then the set electric discharge roller 13 rotates to longitudinally stretch the diaphragm that has completed the laterally extension.

[0037] Working principle: When in use, the electric feed roller 4 serves as the initial power source to transport the diaphragm to the top of the folding platform 3, and then the diaphragm slides along the folding platform 3 and the upper surface of the two curved plates 2. Since the upper surface of the curved plate 2 is a gradually bent structure, the two sides of the diaphragm will fold upward along the upper surface of the curved plate 2 during the sliding process. Among them, the provided pressure strip 5 can limit the upward folded part of the diaphragm, thereby enhancing the stability of the two sides of the diaphragm after folding. In addition, the provided sliding wheel 14 reduces the friction between the pressure strip 5 and the diaphragm, thereby reducing the probability of wrinkles on the diaphragm during the sliding process;

[0038] At the same time, the motor 17 drives the transmission gear 16 to rotate, the transmission gear 16 drives the ring gear 15 to rotate, and the ring gear 15 drives the slide bar 27 and the mounting bracket 21 to rotate. Figure 7As shown, the mounting frame 21 will gradually move downward along the trajectory of the Z-shaped ring plate 6 when it slides over the Z-shaped ring plate 6, and the mounting frame 21 will drive the second slide bar 23, the vertical plate 19 and the clamping block 20 to move downward, thereby causing the two clamping blocks 20 to gradually approach the side of the folded diaphragm; at the same time, the mounting frame 21 drives the second slide bar 23, the vertical plate 19 and the abutting rod 25 to rotate, as shown in FIG. Figure 8 and Figure 9 As shown, the fixed inner ring 39 and the fixed outer ring 40 are narrowed toward the middle, and the two abutting rods 25 are respectively abutted on the side walls of the fixed inner ring 39 and the fixed outer ring 40, which are away from each other. The two abutting rods 25 move toward each other when passing through the narrowed area of ​​the fixed inner ring 39 and the fixed outer ring 40. The two abutting rods 25 respectively drive the two vertical plates 19 and the two clamping blocks 20 to move, thereby causing the two clamping blocks 20 to move toward each other and achieve fixed clamping of the folded sides of the diaphragm; as the two clamping blocks 20 continue to rotate, the width of the diaphragm is stretched, thereby achieving continuous lateral extension of the diaphragm;

[0039] At the same time, if Figure 9 As shown, the abutment plate 26 is deflected to a certain extent when passing through the narrowed area of ​​the fixed inner ring 39 and the fixed outer ring 40, and the abutment plate 26 drives the rotating rod 1 29 to rotate, and the rotating rod 1 29 drives the driving gear 33 and the driven gear 34 to rotate. Since the number of teeth of the driving gear 33 is greater than the number of teeth of the driven gear 34, the driving gear 33 drives the driven gear 34 to rotate faster, and the driven gear 34 drives the rotating rod 2 35 and the flip block 30 to rotate, so that the flip block 30 flips out of the mounting groove 31 and is clamped on the folded diaphragm side, thereby switching the multi-point clamping of the diaphragm side of this device to surface clamping, and by increasing the clamping area between this device and the diaphragm side, the diaphragm is not easy to fall off from the clamping end of this device during the extension process. In addition, the increased clamping area can also cover the gap between adjacent clamping ends, so that the extension of the diaphragm side is more uniform;

[0040] At the same time, when the flip block 30 is clamping the side of the diaphragm, the slider 36 located on the side wall of the flip block 30 is also clamping the side of the diaphragm. When the side of the diaphragm is stretched and extended, a downward reaction force is exerted on the slider 36. The slider 36 subjected to the reaction force slides downward along the inclined rod 37. Since the inclined rod 37 is arranged obliquely, the two sliders 36 gradually approach each other when sliding down, thereby increasing the clamping force of the slider 36 on the side of the diaphragm, which further reduces the probability of the side of the diaphragm falling off.

[0041] Subsequently, when the mounting frame 21 passes through the movable outer ring 44 and the movable inner ring 46, the abutment rod 25, the vertical plate 19 and the clamping block 20 are reset under the elastic force of the second spring 24, thereby releasing the clamping fixation of the two clamping blocks 20 on the sides of the diaphragm; when it is necessary to change the extension width of the diaphragm, the staff can rotate it by twisting the two-way screw rod 41. The rotating two-way screw rod 41 drives the threaded plate 1 51 and the threaded plate 2 43 to move in opposite directions, so that the clamping block 20 is reset in advance under the elastic force of the second spring 24, thereby shortening the extension width of the diaphragm. By twisting multiple sets of two-way screw rods 41 for rotation, multi-level adjustment of the extension width of the diaphragm can be achieved; it should be noted that when adjusting the extension width of the diaphragm, the staff needs to start from the two-way screw rod 41 farthest from the folding table 3 and twist it in sequence;

[0042] Subsequently, the diaphragm that has completed the lateral extension will pass through several shaping rollers 8. Since the diaphragm will shrink to a certain extent after the lateral extension, the several shaping rollers 8 provided can shape the diaphragm that has completed the lateral extension, so as to reduce the probability of the diaphragm shrinking after the lateral extension; subsequently, the diaphragm that has completed the lateral extension is displaced to the electric discharge roller 13, and the electric push rod 10 provided drives the pressure plate 11 to move downward and presses the diaphragm that has completed the lateral extension on the top of the extension platform 12, and then the electric discharge roller 13 provided rotates to longitudinally stretch the diaphragm that has completed the lateral extension, so as to complete the longitudinal extension of the diaphragm.

[0043] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lithium battery diaphragm stretching device, comprising two assembly plates (1), characterized in that: A bottom plate (45) is welded between the side walls of the two assembly plates (1), a folding platform (3) is welded on the top of the bottom plate (45), curved panels (2) are welded on the outer walls of both sides of the folding platform (3), a plurality of support plates (18) are welded on the top of the bottom plate (45), a gear ring (15) is rotatably connected between the tops of every four support plates (18), a plurality of slide rods (27) are welded on the top of each gear ring (15), a mounting frame (21) is slidably arranged between every two slide rods (27), a roller (22) is rotatably connected to the top of each mounting frame (21), and a slide rod (23) is welded on the side wall of each mounting frame (21). Two vertical plates (19) are slidably provided on the outer peripheral wall of each sliding rod (23), abutment rods (25) are welded on the side walls of each vertical plate (19), a clamping block (20) is welded on the bottom of each vertical plate (19), two assembly columns (7) are welded on the top of the bottom plate (45), a Z-shaped ring plate (6) is welded on the outer peripheral wall of each assembly column (7) through a plurality of connecting rods, and a plurality of rollers (22) are abutted against the bottom of the Z-shaped ring plate (6), two fixed inner rings (39) and two fixed outer rings (40) are welded on the top of the bottom plate (45), and a plurality of movable inner rings (46) and movable outer rings (44) are provided on the top of the bottom plate (45).

2. A lithium battery separator extension device according to claim 1, characterized in that: An electric feed roller (4) and an electric discharge roller (13) are installed between the two assembly plates (1), two support frames (48) are welded on the side walls of the two assembly plates (1), and a pressure strip (5) is welded between the bottoms of each two support frames (48). Two motors (17) are fixedly installed on the top of the bottom plate (45), and a transmission gear (16) is fixedly installed on the top output end of each motor (17), and the two transmission gears (16) are respectively engaged with the two gear rings (15). A plurality of shaping rollers (8) are rotatably connected between the two assembly plates (1), and the plurality of shaping rollers (8) are arranged alternately up and down. An extension table (12) is welded between the side walls of the two assembly plates (1), and a mounting plate (9) is welded between the tops of the two assembly plates (1). Two electric push rods (10) are fixedly installed on the bottom of the mounting plate (9), and a pressure plate (11) is fixedly installed between the telescopic ends of the bottoms of the two electric push rods (10).

3. A lithium battery separator extension device according to claim 2, characterized in that: The bottom of the pressure strip (5) is rotatably connected to a plurality of sliding wheels (14).

4. The lithium battery separator extension device according to claim 1, characterized in that: Two mounting grooves (31) are provided on the side wall of the clamping block (20), and the inner walls of the two mounting grooves (31) are both rotatably connected to a second rotating rod (35), and the outer peripheral walls of the two second rotating rods (35) are both welded with a flip block (30), and the tops of the two second rotating rods (35) are both welded with a driven gear (34), and the top of the clamping block (20) is both rotatably connected to a first rotating rod (29), and the outer peripheral walls of the two first rotating rods (29) are both welded with a driving gear (33) and a connecting plate (32), and the tops of the two first rotating rods (29) are both welded with abutment plates (26), and the top of the clamping block (20) is welded with two second connecting plates (49).

5. The lithium battery separator extension device according to claim 4, characterized in that: A plurality of oblique rods (37) are welded on the side wall of the flip block (30), and a slider (36) is slidably arranged between every two oblique rods (37).

6. The lithium battery separator extension device according to claim 5, characterized in that: A plurality of mounting frames (42) are welded to the outer peripheral wall of the assembly column (7) via connecting rods, a bidirectional screw rod (41) is rotatably connected to the side wall of each mounting frame (42), a threaded plate 1 (51) and a threaded plate 2 (43) are threadedly connected to the outer peripheral wall of each bidirectional screw rod (41), and a plurality of threaded plates 1 (51) are welded to a plurality of movable inner rings (46) in a one-to-one correspondence, and a plurality of bidirectional screw rods (41) are welded to a plurality of movable outer rings (44) in a one-to-one correspondence.

7. The lithium battery separator extension device according to claim 6, characterized in that: A limiting rod (47) is welded between the two side walls of the installation frame (42), and the first threaded plate (51) and the second threaded plate (43) are slidably arranged on the outer peripheral wall of the limiting rod (47).

8. The lithium battery separator extension device according to claim 5, characterized in that: A spring (28) is wound around the outer peripheral wall of the sliding rod (27), and the spring (28) is connected between the mounting frame (21) and the spring (28). A spring (24) is wound around the outer peripheral wall of the abutting rod (25), and the spring (24) is connected between the vertical plate (19) and the mounting frame (21). A spring (30) is connected between the connecting plate (49) and the connecting plate (32). A spring (48) is wound around the outer peripheral wall of the inclined rod (37), and the spring (38) is connected between the slider (36) and the flip block (30).

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