An equipment for improving the roll sticking of positive and negative electrode sheets of lithium ion batteries

Abstract

The application relates to the technical field of lithium ion batteries and discloses an equipment for improving the roll sticking of positive and negative electrode sheets of lithium ion batteries, which comprises support plates, rollers and driving rollers, a plurality of driving rollers are arranged between the two support plates, roller presses are arranged on the upper surfaces of the two support plates, and the equipment further comprises a cleaning assembly, a gas collecting assembly, a waste gas treatment assembly and a driving assembly. The lithium ion positive and negative electrode sheets are treated by a plasma cleaner, high-energy particles in the plasma are used to react with the coating on the electrode sheets, organic matters on the surface of the coating are cracked, the organic matters are reacted with oxidants in the plasma after being cracked, are further degraded into low-molecular gases and inorganic matters, the adhesive on the surface of the coating of the electrode sheets is decomposed through the plasma treatment, the adhesion between the coating of the electrode sheets and the roller is reduced, and the occurrence of the roll sticking phenomenon is inhibited.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium ion batteries, and particularly relates to a device for improving roller sticking during roller pressing of positive and negative electrode sheets of lithium ion batteries. BACKGROUND

[0002] Roller pressing of electrode sheets can improve the surface density of the electrode sheets, homogenize the thickness of the electrode sheets, improve the mechanical strength of the electrode sheets, and improve the electrical conductivity of the electrode sheets. In order to improve the energy density of lithium ion batteries, the pressing force of the roller pressing process needs to be increased, and the coating surface density of the electrode sheets needs to be increased. When the pressing force of the roller pressing process is increased, the coating on the electrode sheets is prone to falling off and sticking to the pressure roller. When the roller sticking occurs, the coating sticking to the roller must be removed, otherwise the problem of roller sticking will become more and more serious, affecting the quality and roller pressing rate of the electrode sheets, and reducing the quality and production efficiency of the batteries.

[0003] At present, the roller is cleaned by manual operation or a scraper, and the coating sticking to the roller is removed. In this process, foreign matter is easily introduced onto the surface of the electrode sheets by the hand or the scraper, causing contamination of the electrode sheets and even damage to the electrode sheets.

[0004] Based on this, the present application provides a device for improving roller sticking during roller pressing of positive and negative electrode sheets of lithium ion batteries, which can eliminate the disadvantages of the existing device. SUMMARY

[0005] The present application aims to provide a device for improving roller sticking during roller pressing of positive and negative electrode sheets of lithium ion batteries to solve the problems of the modern product in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A device for improving roller sticking during roller pressing of positive and negative electrode sheets of lithium ion batteries, comprising support plates, a roller presser, and drive rollers, a plurality of drive rollers are arranged between two support plates, a roller presser is arranged on the upper surface of the two support plates, and the device further comprises a cleaning assembly, a gas collection assembly, a waste gas treatment assembly, and a driving assembly.

[0008] The cleaning assembly comprises a key groove shaft and a plasma cleaner, two symmetrical second fixing frames are fixedly connected to the side wall of one of the support plates, a key groove shaft is arranged through the side wall of the second fixing frame, a plasma cleaner is arranged at the lower end of the key groove shaft, a gas storage tank is fixedly arranged on the side wall of the second fixing frame, and the connecting pipe of the gas storage tank is rotatably connected with the plasma cleaner through the key groove shaft.

[0009] The gas collection assembly is arranged at the side wall of the support plate and is used for collecting harmful gas generated during operation of the plasma cleaner.

[0010] The exhaust gas treatment component is located on the side wall of the support plate and is used to purify the harmful gases generated during the operation of the gas storage tank.

[0011] The drive assembly is located on the side wall of the support plate and is used to simultaneously drive the cleaning assembly, the gas collection assembly, and the exhaust gas treatment assembly to work.

[0012] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0013] In one alternative: the sidewall of the second fixing frame is connected to a key cylinder via a bearing, the inner sidewall of the key cylinder is provided with a protrusion, the keyway shaft is slidably connected to the key cylinder through it, the two opposing sidewalls of the second fixing frames are fixedly connected with a telescopic rod, the end of the telescopic rod away from the second fixing frame is fixedly connected to an adaptive plate, the adaptive plate is connected to the keyway shaft via a bearing, the sidewall of the adaptive plate away from the telescopic rod is fixedly connected to an adaptive block, and the sidewall of the adaptive block is provided with a roller.

[0014] In one alternative: the gas collection assembly includes a gas collection cylinder, a second rotating shaft, and fan blades. The gas collection cylinder is fixedly connected through the side wall of the support plate. The inner side wall of the gas collection cylinder is connected to the second rotating shaft via a bearing. Several fan blades are arranged around the second rotating shaft.

[0015] In one alternative embodiment: the exhaust gas treatment assembly includes an exhaust gas treatment cylinder, a circulation pipe, and a nozzle. A first fixing frame is fixedly connected to the side wall of the support plate. The exhaust gas treatment cylinder is fixedly connected to the side wall of the first fixing frame via a bracket. The exhaust gas treatment cylinder and the gas collection cylinder are connected via a gas delivery box. A rotating cylinder is connected to the top wall of the exhaust gas treatment cylinder via a bearing. A nozzle is provided at one end of the rotating cylinder located inside the exhaust gas treatment cylinder. A circulation pipe is fixedly connected to the outer wall of the exhaust gas treatment cylinder. A circulation pump is provided on the circulation pipe. An inlet and an outlet are provided on the side wall of the circulation pipe. One end of the circulation pipe passes through the rotating cylinder and is rotatably connected to the nozzle. An air outlet is provided on the top wall of the exhaust gas treatment cylinder. A drying plate is provided inside the exhaust gas treatment cylinder.

[0016] In one alternative: the drive assembly includes a motor, a first rotating shaft, and a bevel gear component. The first fixed frame is U-shaped. The inner sidewall of the first fixed frame is connected to the first rotating shaft via a bearing. The first rotating shaft is connected to two key cylinders via a timing pulley and a timing belt. The first rotating shaft is connected to a rotating cylinder via a timing belt and a timing pulley. The first rotating shaft is connected to a second rotating shaft via a bevel gear component.

[0017] In one alternative: a spring is fixedly connected between the second fixing frame and the adaptive plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1、The application handles lithium ion positive and negative electrode sheets through the plasma cleaner, utilizes high-energy particles in the plasma to react with the coating on the electrode sheet, makes the organic matter on the coating surface crack, and after the organic matter cracks, reacts with the oxidizing agent in the plasma, and is further degraded into low molecular gas and inorganic matter. Through the plasma treatment, the adhesive on the coating surface of the electrode sheet is decomposed, the adhesion between the electrode sheet coating and the roller is reduced, and the occurrence of the roller sticking phenomenon is inhibited.

[0020] 2、The application drives the key barrel to rotate through the driving assembly, the key barrel drives the key groove shaft to rotate, and the key groove shaft drives the plasma cleaner to rotate, so that the plasma cleaner rotates to clean the front and back surfaces of the lithium ion battery electrode sheet, avoiding the situation that the electrode sheet is not cleaned completely due to the gap between the plasma emitters.

[0021] 3、The application drives the two self-adaptive plates to move through the abutment of the two rollers and the electrode sheet, the two self-adaptive plates can drive the two key groove shafts to move, and the distance between the two plasma cleaners and the electrode sheet can be adaptively controlled according to the electrode sheets of different thicknesses, without the need for manual adjustment, which is convenient to use.

[0022] 4、The application drives the fan blades to rotate through the rotation of the second rotating shaft, generates negative pressure, and uses the harmful gas generated by the reaction of high-energy particles in the plasma and the coating on the electrode sheet through the plasma cleaner to be sucked into the waste gas treatment cylinder through the gas conveying box, so that the harmful gas is concentrated and treated, avoiding that workers inhale the harmful gas for a long time.

[0023] 5、The application pours the catalyst into the water inlet of the circulating pipe, circulates under the action of the circulating pump, catalytically oxidizes the harmful gas, converts it into water, carbon dioxide and other harmless gases, and then discharges it from the exhaust hole of the waste gas treatment cylinder after drying through the drying plate, reduces air pollution, and is beneficial to environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the application.

[0025] Figure 2 It is a first perspective view of the application.

[0026] Figure 3 It is a second perspective view of the application.

[0027] Figure 4 It is a structural schematic view of the cleaning assembly of the application.

[0028] Figure 5 It is a first cross-sectional view of the application.

[0029] Figure 6 It is aFigure 5 Enlarged view at A.

[0030] Figure 7 Second cross-sectional view of the application.

[0031] Figure 8 Structure schematic diagram of the gas collection assembly of the application.

[0032] Reference signs annotation: 1 support plate, 2 roller, 3 driving roller, 4 cleaning assembly, 5 first fixed frame, 6 gas tank, 7 motor, 8 second fixed frame, 9 self-adaptive plate, 10 key groove shaft, 11 self-adaptive block, 12 roller, 13 telescopic rod, 14 first rotating shaft, 15 key cylinder, 16 plasma cleaner, 17 gas collection cylinder, 18 waste gas treatment cylinder, 19 circulating pipe, 20 rotating cylinder, 21 drying plate, 22 spray head, 23 gas conveying box, 24 gas collection assembly, 25 bevel gear, 26 second rotating shaft, 27 fan blade, 28 waste gas treatment assembly, 29 driving assembly. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and examples.

[0034] In one embodiment, as shown in Figures 1-8 An improved device for improving the roller pressing and sticking of positive and negative electrode sheets of lithium ion batteries includes support plates 1, roller presses 2, and driving rollers 3. A plurality of driving rollers 3 are arranged between the two support plates 1, and roller presses 2 are arranged on the upper surfaces of the two support plates 1. The device also includes a cleaning assembly 4, a gas collection assembly 24, and a waste gas treatment assembly 28.

[0035] The cleaning assembly 4 includes key groove shafts 10 and plasma cleaners 16. The side walls of one of the support plates 1 are fixedly connected with two symmetrical second fixed frames 8. The side walls of the second fixed frames 8 are throughly provided with key groove shafts 10. The lower ends of the key groove shafts 10 are provided with plasma cleaners 16. The side walls of the second fixed frames 8 are fixedly provided with gas tanks 6. The connecting pipes of the gas tanks 6 are throughly and rotatably connected with the plasma cleaners 16 via the key groove shafts 10.

[0036] The gas collection assembly 24 is arranged at the side wall of the support plate 1, and is used to collect harmful gases generated during the operation of the plasma cleaner 16.

[0037] The waste gas treatment assembly 28 is arranged at the side wall of the support plate 1, and is used to purify harmful gases generated during the operation of the gas tank 6.

[0038] The driving assembly 29 is arranged at the side wall of the support plate 1, and is used to simultaneously drive the cleaning assembly 4, the gas collection assembly 24, and the waste gas treatment assembly 28 to work.

[0039] Before the lithium ion battery pole piece is rolled, the plasma cleaner 16 is started, the lithium ion positive and negative pole pieces are treated through the plasma cleaner 16, the high-energy particles in the plasma are utilized to react with the coating on the pole piece, the organic matter on the surface of the coating is cracked, and after the organic matter is cracked, the organic matter reacts with the oxidant in the plasma to further degrade into low molecular gas and inorganic matter. Through the plasma treatment, the adhesive on the surface of the pole piece coating is decomposed, the adhesion between the pole piece coating and the roller is reduced, and the occurrence of the sticking phenomenon is inhibited.

[0040] The motor 7 is started, the key barrel 15 is driven to rotate through the driving assembly 29, the key barrel 15 drives the key groove shaft 10 to rotate, the key groove shaft 10 drives the plasma cleaner 16 to rotate, so that the plasma cleaner 16 rotates to clean the front and back surfaces of the lithium ion battery pole piece, and the local cleaning of the pole piece is not clean due to the gap between the plasma emitters.

[0041] In one embodiment, as shown in Figure 4 and Figure 5 The side wall of the second fixing frame 8 is connected with the key barrel 15 through the bearing, the inner side wall of the key barrel 15 is provided with a protrusion, the key groove shaft 10 is connected with the key barrel 15 through sliding, the opposite side walls of the two second fixing frames 8 are fixedly connected with the lifting rods 13, one end of the lifting rod 13 away from the second fixing frame 8 is fixedly connected with the self-adaptive plate 9, the self-adaptive plate 9 is connected with the key groove shaft 10 through the bearing, the side wall of the self-adaptive plate 9 away from the lifting rod 13 is fixedly connected with the self-adaptive block 11, and the side wall of the self-adaptive block 11 is provided with the roller 12.

[0042] The two rollers 12 abut against the pole piece, drive the two self-adaptive plates 9 to move, the two self-adaptive plates 9 can drive the two key groove shafts 10 to move, the distance between the two plasma cleaners 16 and the pole piece can be adaptively controlled according to the pole pieces of different thicknesses, manual adjustment is not needed, and convenience is brought to users.

[0043] In one embodiment, as shown in Figure 6 and Figure 8 The gas collecting assembly 24 includes the gas collecting barrel 17, the second rotating shaft 26 and the fan blade 27, the gas collecting barrel 17 is fixedly connected with the support plate 1 through the side wall, the inner side wall of the gas collecting barrel 17 is connected with the second rotating shaft 26 through the bearing, and the second rotating shaft 26 is provided with a plurality of fan blades 27.

[0044] The second rotating shaft 26 is rotated to drive the fan blade 27 to rotate, negative pressure is generated, the harmful gas generated by the reaction of the high-energy particles in the plasma and the coating on the pole piece is sucked into the waste gas treatment barrel 18 through the gas collecting barrel 17, and the harmful gas is concentrated and treated, so that workers do not inhale the harmful gas for a long time.

[0045] In one embodiment, as shown inFigure 5 and Figure 8 As shown in Figure 8 , the waste gas treatment component 28 includes a waste gas treatment cylinder 18, a circulation pipe 19, and a spray head 22. A first fixing frame 5 is fixedly connected to the side wall of the support plate 1. The side wall of the first fixing frame 5 is fixedly connected to the waste gas treatment cylinder 18 through a bracket. The waste gas treatment cylinder 18 is communicated with the gas collection cylinder 17 through an air delivery box 23. The top wall of the waste gas treatment cylinder 18 is connected to a rotating cylinder 20 through a bearing. A spray head 22 is provided at one end of the rotating cylinder 20 located inside the waste gas treatment cylinder 18. A circulation pipe 19 is fixedly connected to the outer side wall of the waste gas treatment cylinder 18. A circulation pump is provided on the circulation pipe 19. Water inlets and outlets are provided on the side wall of the circulation pipe 19. One end of the circulation pipe 19 penetrates through the rotating cylinder 20 and is rotatably connected to the spray head 22. An air outlet hole is provided on the top wall of the waste gas treatment cylinder 18. A drying plate 21 is provided inside the waste gas treatment cylinder 18.

[0046] After the harmful gas enters the waste gas treatment cylinder 18, a catalyst is poured into the water inlet of the circulation pipe 19 and circulates under the action of the circulation pump to catalytically oxidize the harmful gas, converting it into water, carbon dioxide and other harmless gases. After drying through the drying plate 21, it is discharged from the exhaust hole of the waste gas treatment cylinder 18. The rotating cylinder 20 drives the spray head 22 to rotate and spray, which can make the catalyst fully contact and react with the harmful gas.

[0047] In one embodiment, as Figure 5 and Figure 6 shown in Figure 6 , the driving component 29 includes a motor 7, a first rotating shaft 14, and a bevel gear component 25. The first fixing frame 5 is in a "冂" shape. The inner side wall of the first fixing frame 5 is connected to the first rotating shaft 14 through a bearing. The first rotating shaft 14 is connected to two key cylinders 15 through a synchronous pulley and a synchronous belt. The first rotating shaft 14 is connected to the rotating cylinder 20 through a synchronous belt and a synchronous pulley. The first rotating shaft 14 is connected to the second rotating shaft 26 through the bevel gear component 25. <00001​​​​​​​

[0050] The above embodiment discloses an improved device for reducing the adhesion of lithium ion battery positive and negative electrode sheets to the roller. Before the lithium ion battery electrode sheet is rolled, the plasma cleaner 16 is started to treat the lithium ion positive and negative electrode sheets. The high-energy particles in the plasma react with the coating on the electrode sheet, causing the organic matter on the surface of the coating to crack. After the organic matter is cracked, it reacts with the oxidizing agent in the plasma to further degrade into low molecular gas and inorganic matter. Through plasma treatment, the adhesive on the surface of the electrode sheet coating is decomposed, reducing the adhesion of the electrode sheet coating to the roller and inhibiting the occurrence of the adhesion phenomenon.

[0051] The motor 7 is started to drive the key barrel 15 to rotate, the key barrel 15 drives the key groove shaft 10 to rotate, and the key groove shaft 10 drives the plasma cleaner 16 to rotate, so that the plasma cleaner 16 can rotate and clean the front and back surfaces of the lithium ion battery electrode sheet, avoiding the situation that the electrode sheet is not cleaned completely due to the gap between the plasma emitters.

[0052] The two rollers 12 abut against the electrode sheet to drive the two self-adaptive plates 9 to move. The two self-adaptive plates 9 can drive the two key groove shafts 10 to move, and can adaptively control the distance between the two plasma cleaners 16 and the electrode sheet according to the thickness of the electrode sheet, without the need for manual adjustment, which is convenient to use.

[0053] The second rotating shaft 26 is rotated to drive the fan blade 27 to rotate, generating negative pressure. The harmful gas generated by the reaction of the high-energy particles in the plasma and the coating on the electrode sheet is sucked into the waste gas treatment cylinder 18 through the gas inlet box 23, and the harmful gas is concentrated and treated, avoiding the staff from inhaling harmful gas for a long time.

[0054] After the harmful gas enters the waste gas treatment cylinder 18, the catalyst is poured into the water inlet of the circulating pipe 19, and circulates under the action of the circulating pump to catalytically oxidize the harmful gas and convert it into water, carbon dioxide and other harmless gases. After drying by the drying plate 21, the harmful gas is discharged from the exhaust hole of the waste gas treatment cylinder 18. The rotating cylinder 20 drives the spray head 22 to rotate and spray, so that the catalyst can fully contact and react with the harmful gas.

[0055] The starting motor 7 drives the first rotating shaft 14 to rotate, the first rotating shaft 14 drives the two key barrels 15 to rotate through the synchronous belt and the synchronous belt wheel, the first rotating shaft 14 drives the rotating barrel 20 to rotate through the synchronous belt and the synchronous belt wheel, and the first rotating shaft 14 drives the second rotating shaft 26 to rotate through the bevel gear part 25, so that the key barrel 15, the rotating barrel 20 and the second rotating shaft 26 are driven to rotate simultaneously through the motor 7, the rotating spraying catalyst, the rotating cleaning pole piece and the rotating fan blade 27 produce negative pressure to collect gas, and the motor driving can be shared, the cost of additionally providing the motor is saved, and the weight of the equipment is also reduced.

[0056] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An equipment for improving the roll sticking of positive and negative electrode sheets of lithium ion batteries, comprising support plates (1), a roller (2) and drive rollers (3), a plurality of drive rollers (3) are arranged between two support plates (1), and a roller (2) is arranged on the upper surface of the two support plates (1), characterized in that, It also includes cleaning assembly (4), gas collection assembly (24), waste gas treatment assembly (28), drive assembly (29); The cleaning assembly (4) includes a key groove shaft (10) and a plasma cleaner (16), wherein the side wall of one of the support plates (1) is fixedly connected with two symmetrical second fixed frames (8), the side wall of the second fixed frame (8) is provided with a key groove shaft (10), the lower end of the key groove shaft (10) is provided with a plasma cleaner (16), the side wall of the second fixed frame (8) is fixedly provided with a gas storage tank (6), and the connecting pipe of the gas storage tank (6) is rotatably connected with the plasma cleaner (16) through the key groove shaft (10). The gas collection assembly (24) is arranged at the side wall of the support plate (1), and is used for collecting harmful gas generated in the working of the plasma cleaner (16). The waste gas treatment assembly (28) is arranged at the side wall of the support plate (1), and is used for purifying harmful gas generated in the working of the gas storage tank (6). The drive assembly (29) is arranged at the side wall of the support plate (1), and is used for simultaneously driving the cleaning assembly (4), the gas collection assembly (24) and the waste gas treatment assembly (28) to work.

2. The device for improving the roll sticking of positive and negative electrode sheets of a lithium ion battery according to claim 1, characterized in that, The side wall of the second fixed frame (8) is connected with a key barrel (15) through a bearing, the inner side wall of the key barrel (15) is provided with a protrusion, the key groove shaft (10) and the key barrel (15) are slidably connected, the opposite side walls of the two second fixed frames (8) are fixedly connected with lifting and retracting rods (13), one end of the lifting and retracting rod (13) away from the second fixed frame (8) is fixedly connected with an adaptive plate (9), the adaptive plate (9) is connected with the key groove shaft (10) through a bearing, the side wall of the adaptive plate (9) away from the lifting and retracting rod (13) is fixedly connected with an adaptive block (11), and the side wall of the adaptive block (11) is provided with a roller (12).

3. The device for improving the roll sticking of positive and negative electrode sheets of a lithium ion battery according to claim 1, characterized in that, The gas collection assembly (24) includes a gas collection cylinder (17), a second rotating shaft (26) and a fan blade (27), the side wall of the support plate (1) is fixedly connected with the gas collection cylinder (17), the inner side wall of the gas collection cylinder (17) is connected with the second rotating shaft (26) through a bearing, and the periphery of the second rotating shaft (26) is provided with a plurality of fan blades (27).

4. The device for improving the roll sticking of positive and negative electrode sheets of a lithium ion battery according to claim 1, characterized in that, The exhaust treatment assembly (28) comprises an exhaust treatment cylinder (18), a circulating pipe (19) and a spray head (22), the side wall of the support plate (1) is fixedly connected with a first fixing frame (5), the side wall of the first fixing frame (5) is fixedly connected with the exhaust treatment cylinder (18) through a support, the exhaust treatment cylinder (18) is communicated with the gas collecting cylinder (17) through a gas conveying box (23), the top wall of the exhaust treatment cylinder (18) is connected with a rotating cylinder (20) through a bearing, one end of the rotating cylinder (20) located in the exhaust treatment cylinder (18) is provided with the spray head (22), the outer side wall of the exhaust treatment cylinder (18) is fixedly connected with the circulating pipe (19), the circulating pipe (19) is provided with a circulating pump, the side wall of the circulating pipe (19) is provided with a water inlet and a water outlet, one end of the circulating pipe (19) penetrates through the rotating cylinder (20) and is rotatably connected with the spray head (22), the top wall of the exhaust treatment cylinder (18) is provided with an air outlet, and the exhaust treatment cylinder (18) is provided with a drying plate (21).

5. The apparatus for improving the roll sticking of positive and negative electrode sheets of a lithium ion battery according to claim 4, wherein The driving assembly (29) comprises a motor (7), a first rotating shaft (14) and a bevel gear part (25), the first fixing frame (5) is a "H" type, the inner side wall of the first fixing frame (5) is connected with the first rotating shaft (14) through a bearing, the first rotating shaft (14) is connected with two key cylinders (15) through synchronous pulleys and synchronous belts, the first rotating shaft (14) is connected with the rotating cylinder (20) through synchronous belts and synchronous pulleys, and the first rotating shaft (14) is connected with the second rotating shaft (26) through the bevel gear part (25).

6. The device for improving the roll sticking of positive and negative electrode sheets of a lithium ion battery according to claim 2, characterized in that, The second fixing frame (8) and the self-adaptive plate (9) are fixedly connected with springs.

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