Stretching device for preparing lithium battery diaphragm

Abstract

The utility model discloses a stretching device for preparing a lithium battery diaphragm, which comprises a bottom plate, two first supports are fixedly connected to the top of the bottom plate, an unwinding roller is rotatably connected between the two first supports, a fixing frame is fixedly connected to the top of the bottom plate, a displacement plate is slidably connected to the inside of the fixing frame, and a stretching assembly is arranged at the top of the displacement plate. A mounting frame is fixedly connected to the top of the fixing frame, a displacement assembly is arranged on one side of the mounting frame, two second supports are fixedly connected to the top of the bottom plate, and a finished product roller is rotationally connected between the two second supports. The utility model aims to solve the problems that the product quality is unstable, the rejection rate in the production process is increased, the production efficiency is reduced and the practicability of the device is further reduced because the lithium battery diaphragm is easily damaged after the lithium battery diaphragm is stretched for multiple times through a stretching roller in the conventional stretching device.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragms, in particular to a stretching device for preparing lithium battery diaphragms. Background Art

[0002] Lithium battery is a high energy density, lightweight, environmentally friendly power source, which is widely used in electric vehicles, mobile phones, laptops and other fields. In lithium batteries, the separator plays the role of isolating the positive and negative electrodes, preventing short circuits and electrolyte mixing, and ensuring the safety and stability of the battery. In the manufacture of lithium battery separators, stretching is an indispensable process.

[0003] The current stretching device stretches the lithium battery separator multiple times through stretching rollers. However, the lithium battery separator is prone to breakage after such operation, which leads to unstable product quality, increases the scrap rate in the production process, reduces production efficiency, and thus reduces the practicality of the device. Utility Model Content

[0004] The purpose of the utility model is to provide a stretching device for preparing a lithium battery diaphragm to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a bottom plate, two first brackets are fixedly connected to the top of the bottom plate, an unwinding roller is rotatably connected between the two first brackets, a fixed frame is fixedly connected to the top of the bottom plate, a displacement plate is slidably connected inside the fixed frame, a stretching assembly is arranged on the top of the displacement plate, a mounting frame is fixedly connected to the top of the fixed frame, a displacement assembly is arranged on one side of the mounting frame, two second brackets are fixedly connected to the top of the bottom plate, a finished product roller is rotatably connected between the two second brackets, a second motor is fixedly installed on one side of one of the second brackets, one end of the output shaft of the second motor is fixedly connected to one end of the rotating shaft of the finished product roller, a U-shaped plate is arranged at the bottom of the stretching assembly, a displacement frame is slidably connected inside the U-shaped plate, a spring is fixedly connected between the top of the displacement frame and the inner wall of the U-shaped plate, a limiting groove is penetrated through the outer side of the U-shaped plate, a limiting block is slidably connected inside the limiting groove, one end of the limiting block is fixedly connected to one side of the displacement frame, and an extrusion roller is rotatably connected inside the displacement frame.

[0006] As a further preferred embodiment of the present technical solution, the displacement assembly includes a first motor, which is fixedly mounted on the top of the mounting frame, the top of the mounting frame is rotatably connected to a first pulley, and one end of the output shaft of the first motor is fixedly connected to one end of the rotating shaft of the first pulley.

[0007] As a further preferred embodiment of the present technical solution, the displacement assembly further includes a second pulley, the second pulley is rotatably connected to the top of the fixed frame, and a transmission belt is arranged between the second pulley and the first pulley.

[0008] As a further preferred embodiment of the present technical solution, the top of the displacement plate is rotatably connected to a reciprocating screw, a threaded groove is provided inside the second pulley and is threadedly connected to the outer side of the reciprocating screw, a displacement groove is provided on the outer side of the fixed frame, a displacement block is slidably connected inside the displacement groove, and one end of the displacement block is fixedly connected to one side of the displacement plate.

[0009] As a further preferred embodiment of the present technical solution, the stretching assembly includes two second vertical plates, the two second vertical plates are fixedly connected to the top of the displacement plate, a bidirectional screw rod is rotatably connected between the two second vertical plates, a third motor is fixedly installed on one side of one of the second vertical plates, and one end of the output shaft of the third motor is fixedly connected to one end of the bidirectional screw rod.

[0010] As a further preferred embodiment of the present technical solution, the stretching assembly further includes two first vertical plates, the two first vertical plates are fixedly connected to the top of the displacement plate, and a sliding rod is fixedly connected between the two first vertical plates.

[0011] As a further preferred embodiment of the present technical solution, a strip groove is provided through the surface of the displacement plate, a slider is slidably connected inside the strip groove, the inside of the slider is movably sleeved with the outside of the slide rod, a thread groove is provided inside the side of the slider away from the slide rod and is threadedly connected to the outside of the bidirectional screw rod, and the bottom of the slider is fixedly connected to the top of the U-shaped plate.

[0012] The utility model provides a stretching device for preparing lithium battery diaphragm, which has the following beneficial effects:

[0013] (1) The utility model starts the operation of the displacement assembly, thereby driving the displacement plate to move and simultaneously driving the two squeezing rollers to move downward to contact the top of the diaphragm. Then, the squeezing rollers contact the diaphragm to drive the displacement frame to move and simultaneously drive the limit block to slide inside the limit groove, thereby increasing the stability of the movement of the displacement frame. Then, the displacement frame moves to compress the spring, and under the reaction force of the spring, the squeezing rollers are better fitted to the diaphragm, avoiding the problem of wear of the diaphragm during stretching, thereby increasing the practicality of the device.

[0014] (2) The utility model starts the stretching assembly to drive the two squeezing rollers to move in opposite directions, so that the stretching distance of the two squeezing rollers can be adjusted to stretch the compressed diaphragm. This can make the stretching more effective and avoid the phenomenon that the lithium battery diaphragm is easily damaged after stretching, which leads to unstable product quality and increases the scrap rate in the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the displacement assembly structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the stretching assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the buffer component of the utility model;

[0019] In the figure: 1, bottom plate; 2, first bracket; 3, mounting frame; 4, first motor; 5, reciprocating screw; 6, finished product roller; 7, second motor; 8, second bracket; 9, fixed frame; 10, unwinding roller; 11, transmission belt; 12, displacement plate; 13, extrusion roller; 14, first pulley; 15, limit block; 16, second pulley; 17, displacement block; 18, displacement groove; 19, strip groove; 20, bidirectional screw; 21, third motor; 22, first vertical plate; 23, second vertical plate; 24, slider; 25, slide bar; 26, spring; 27, displacement frame; 28, U-shaped plate; 29, limit groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] The utility model provides a technical solution: Figure 1-Figure 4As shown, in this embodiment, a stretching device for preparing a lithium battery diaphragm includes a bottom plate 1, two first brackets 2 are fixedly connected to the top of the bottom plate 1, a reeling roller 10 is rotatably connected between the two first brackets 2, a fixing frame 9 is fixedly connected to the top of the bottom plate 1, a displacement plate 12 is slidably connected inside the fixing frame 9, a stretching assembly is arranged on the top of the displacement plate 12, a mounting frame 3 is fixedly connected to the top of the fixing frame 9, a displacement assembly is arranged on one side of the mounting frame 3, two second brackets 8 are fixedly connected to the top of the bottom plate 1, a finished product roller 6 is rotatably connected between the two second brackets 8, and the bottom plate 1 has a plurality of first brackets 2 and a plurality of second brackets 8. A second motor 7 is fixedly installed on one side of a second bracket 8, one end of the output shaft of the second motor 7 is fixedly connected to one end of the rotating shaft of the finished product roller 6, a U-shaped plate 28 is arranged at the bottom of the stretching assembly, a displacement frame 27 is slidably connected inside the U-shaped plate 28, a spring 26 is fixedly connected between the top of the displacement frame 27 and the inner wall of the U-shaped plate 28, a limiting groove 29 is penetrated through the outer side of the U-shaped plate 28, a limiting block 15 is slidably connected inside the limiting groove 29, one end of the limiting block 15 is fixedly connected to one side of the displacement frame 27, and an extrusion roller 13 is rotatably connected inside the displacement frame 27.

[0022] First, the diaphragm on one side of the unwinding roller 10 is pulled so that it is placed on the top of the bottom plate 1 and at the bottom of the squeezing roller 13, and then the displacement component is started to operate, thereby driving the displacement plate 12 to move and driving the two squeezing rollers 13 to move down and contact the top of the diaphragm, and then the squeezing roller 13 contacts the diaphragm to drive the displacement frame 27 to move and drive the limit block 15 to slide inside the limit groove 29, thereby increasing the stability of the movement of the displacement frame 27, and then the displacement frame 27 moves to compress the spring 26, and under the reaction force of the spring 26, the squeezing roller 13 is better fitted with the diaphragm, thereby increasing the practicality of the device, and then the stretching component is started to operate, thereby driving the two squeezing rollers 13 to move in the opposite direction, so as to stretch the compressed diaphragm, which can be stretched more effectively and avoid the phenomenon that the lithium battery diaphragm is easily damaged after stretching, thereby resulting in unstable product quality and increasing the scrap rate in the production process. Finally, the stretched diaphragm is wound around the outside of the finished roller 6, and then the second motor 7 is started to realize automatic winding.

[0023] like Figure 1-Figure 4As shown, the displacement assembly includes a first motor 4, which is fixedly mounted on the top of the mounting frame 3, and a first pulley 14 is rotatably connected to the top of the fixing frame 9. One end of the output shaft of the first motor 4 is fixedly connected to one end of the rotating shaft of the first pulley 14. The displacement assembly also includes a second pulley 16, which is rotatably connected to the top of the fixing frame 9, and a transmission belt 11 is arranged between the second pulley 16 and the first pulley 14. The top of the displacement plate 12 is rotatably connected to the reciprocating screw rod 5, and a threaded groove is provided inside the second pulley 16 and is threadedly connected to the outer side of the reciprocating screw rod 5. A displacement groove 18 is provided on the outer side of the fixing frame 9, and a displacement block 17 is slidably connected inside the displacement groove 18, and one end of the displacement block 17 is fixedly connected to one side of the displacement plate 12.

[0024] Before stretching, the first motor 4 is started to rotate its output shaft to drive the first pulley 14 to rotate, and the second pulley 16 is driven to rotate through the transmission belt 11, and then the reciprocating screw 5 is driven to move and the displacement plate 12 is driven to move downward, and then the displacement block 17 is driven to slide inside the displacement groove 18, thereby increasing the stability of the movement of the displacement plate 12.

[0025] like Figure 1-Figure 4 As shown, the stretching assembly includes two second vertical plates 23, the two second vertical plates 23 are fixedly connected to the top of the displacement plate 12, and a bidirectional screw rod 20 is rotatably connected between the two second vertical plates 23, a third motor 21 is fixedly installed on one side of one of the second vertical plates 23, and one end of the output shaft of the third motor 21 is fixedly connected to one end of the bidirectional screw rod 20, the stretching assembly also includes two first vertical plates 22, the two first vertical plates 22 are fixedly connected to the top of the displacement plate 12, a sliding rod 25 is fixedly connected between the two first vertical plates 22, a strip groove 19 is opened through the surface of the displacement plate 12, a slider 24 is slidably connected inside the strip groove 19, the interior of the slider 24 is movably sleeved with the outer side of the sliding rod 25, a threaded groove is opened inside the side of the slider 24 away from the sliding rod 25 and is threadedly connected to the outer side of the bidirectional screw rod 20, and the bottom of the slider 24 is fixedly connected to the top of the U-shaped plate 28.

[0026] During stretching, the output shaft of the third motor 21 is started to rotate, driving the bidirectional screw 20 to rotate and at the same time driving the two sliders 24 to slide on the outside of the slide rod 25. The slide rod 25 prevents the slider 24 from offset when moving. Then the slider 24 moves inside the strip groove 19 to drive the two U-shaped plates 28 to move, and then drives the extrusion rollers 13 inside the two displacement frames 27 to contact the diaphragm to perform the stretching operation.

[0027] The utility model provides a stretching device for preparing lithium battery diaphragms, and the specific working principle is as follows: first, the diaphragm on one side of the unwinding roller 10 is pulled so that it is placed on the top of the bottom plate 1 and located at the bottom of the squeezing roller 13, and then the output shaft of the first motor 4 is started to rotate to drive the first pulley 14 to rotate and at the same time drive the second pulley 16 to rotate through the transmission belt 11, and then drive the reciprocating screw rod 5 to move and drive the displacement plate 12 to move downward, and then drive the displacement block 17 to slide inside the displacement groove 18, thereby increasing the stability of the movement of the displacement plate 12, and then drive the displacement frame 27 to move through the squeezing roller 13 and the diaphragm to contact and drive the limit block 15 to slide inside the limit groove 29, thereby increasing the displacement frame 27 The stability of movement, then the displacement frame 27 moves to compress the spring 26, and under the reaction force of the spring 26, the extrusion roller 13 is better fitted with the diaphragm, and then, during stretching, the output shaft of the third motor 21 is started to rotate to drive the bidirectional screw 20 to rotate and drive the two sliders 24 to slide on the outside of the slide bar 25. The slide bar 25 is used to avoid the problem of offset when the slider 24 moves. Then the slider 24 moves inside the strip groove 19 to drive the two U-shaped plates 28 to move, and then drives the extrusion rollers 13 inside the two displacement frames 27 to contact the diaphragm for stretching operation. Finally, the stretched diaphragm is wrapped around the outside of the finished roller 6, and then the second motor 7 is started to realize automatic winding.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stretching device for preparing a lithium battery separator, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to two first brackets (2), a reeling roller (10) is rotatably connected between the two first brackets (2), the top of the bottom plate (1) is fixedly connected to a fixing frame (9), a displacement plate (12) is slidably connected inside the fixing frame (9), a stretching assembly is arranged on the top of the displacement plate (12), the top of the fixing frame (9) is fixedly connected to a mounting frame (3), a displacement assembly is arranged on one side of the mounting frame (3), the top of the bottom plate (1) is fixedly connected to two second brackets (8), a finished product roller (6) is rotatably connected between the two second brackets (8), one side of one of the second brackets (8) is fixedly connected to the top of the bottom plate (1), and a finished product roller (6) is rotatably connected between the two second brackets (8). A second motor (7) is installed, one end of the output shaft of the second motor (7) is fixedly connected to one end of the rotating shaft of the finished product roller (6), a U-shaped plate (28) is arranged at the bottom of the stretching component, a displacement frame (27) is slidably connected inside the U-shaped plate (28), a spring (26) is fixedly connected between the top of the displacement frame (27) and the inner wall of the U-shaped plate (28), a limiting groove (29) is penetrated through the outer side of the U-shaped plate (28), a limiting block (15) is slidably connected inside the limiting groove (29), one end of the limiting block (15) is fixedly connected to one side of the displacement frame (27), and an extrusion roller (13) is rotatably connected inside the displacement frame (27).

2. A stretching device for preparing a lithium battery separator according to claim 1, characterized in that: The displacement assembly comprises a first motor (4), the first motor (4) is fixedly mounted on the top of the mounting frame (3), the top of the fixing frame (9) is rotatably connected to a first pulley (14), and one end of the output shaft of the first motor (4) is fixedly connected to one end of the rotating shaft of the first pulley (14).

3. A stretching device for preparing a lithium battery separator according to claim 2, characterized in that: The displacement assembly also includes a second pulley (16), which is rotatably connected to the top of the fixed frame (9), and a transmission belt (11) is arranged between the second pulley (16) and the first pulley (14).

4. A stretching device for preparing a lithium battery separator according to claim 3, characterized in that: The top of the displacement plate (12) is rotatably connected to a reciprocating screw rod (5); a thread groove is provided inside the second pulley (16) and is threadably connected to the outer side of the reciprocating screw rod (5); a displacement groove (18) is provided through the outer side of the fixed frame (9); a displacement block (17) is slidably connected inside the displacement groove (18); one end of the displacement block (17) is fixedly connected to one side of the displacement plate (12).

5. A stretching device for preparing a lithium battery separator according to claim 1, characterized in that: The stretching assembly comprises two second vertical plates (23), the two second vertical plates (23) are fixedly connected to the top of the displacement plate (12), a bidirectional screw rod (20) is rotatably connected between the two second vertical plates (23), a third motor (21) is fixedly mounted on one side of one of the second vertical plates (23), and one end of the output shaft of the third motor (21) is fixedly connected to one end of the bidirectional screw rod (20).

6. A stretching device for preparing a lithium battery separator according to claim 5, characterized in that: The stretching assembly further comprises two first vertical plates (22), the two first vertical plates (22) are fixedly connected to the top of the displacement plate (12), and a sliding rod (25) is fixedly connected between the two first vertical plates (22).

7. A stretching device for preparing a lithium battery separator according to claim 6, characterized in that: The surface of the displacement plate (12) is provided with a strip groove (19) extending therethrough, a slider (24) is slidably connected inside the strip groove (19), the inside of the slider (24) is movably sleeved with the outside of the slide rod (25), a thread groove is provided inside the side of the slider (24) away from the slide rod (25) and is threadedly connected with the outside of the bidirectional screw rod (20), and the bottom of the slider (24) is fixedly connected with the top of the U-shaped plate (28).

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