Pole piece production equipment and battery production line

Abstract

The invention relates to the field of battery production, and discloses pole piece production equipment and a battery production line, the pole piece production equipment comprises a stirring and scattering device, a rolling and forming device, a guiding and unwinding device, a thinning device, a composite unwinding device, a rolling and compounding device and a winding device, the stirring and scattering device is used for stirring and crushing pole piece materials; the guide unreeling device is provided with at least one unreeling position, the thinning device is used for thinning a pole piece film formed by the rolling forming device, the composite unreeling device is provided with at least two unreeling positions, and at least one of the two unreeling positions is used for realizing reeling. When the thickness of a pole piece film which is thinned by the thinning device for the first time cannot meet the requirement, the pole piece film can be wound at one unwinding position of the composite unwinding device, and a pole piece film roll which does not meet the requirement after being wound is transferred to an unwinding position of the guide unwinding device to be unwound; and the pole piece film is thinned again through the thinning device until the requirement is met.

Description

Technical Field

[0001] The present application relates to the field of battery production, and in particular to a pole piece production equipment and a battery production line. Background Art

[0002] In the field of dry electrode production technology, the current mainstream equipment mostly adopts an integrated design of continuous rollers, integrating multiple processes such as film formation, thinning and compounding. The centering operation of this type of equipment in the compounding process mostly relies on manual visual inspection and manual adjustment, and the degree of automation is low. Although the split dry electrode production equipment attempts to separate the functional modules to improve the flexibility of the equipment, it still needs to be improved in terms of functional integration and automatic control.

[0003] Continuous roller equipment faces limitations when processing membranes that do not meet thickness standards. It is difficult to achieve the required specifications through secondary thinning, resulting in limited material utilization. Summary of the invention

[0004] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a pole piece production equipment and a battery production line.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] This application provides:

[0007] A pole piece production device, comprising:

[0008] A stirring and breaking device, which is used to stir and break up the electrode material;

[0009] A roller forming device, the roller forming device is located at the discharge end of the stirring and breaking device, and the roller forming device is used to roll the electrode material from the stirring and breaking device into an electrode film;

[0010] A guide unwinding device, the guide unwinding device is located in the downstream direction of the roll-forming device, and the guide unwinding device has at least one unwinding position;

[0011] A thinning device, the thinning device is located at the discharge end of the guide unwinding device, and the thinning device thins the electrode film formed by the roller forming device;

[0012] A composite unwinding device, the composite unwinding device is located at the discharge end of the thinning device, the composite unwinding device has at least two unwinding positions, at least one of the two unwinding positions is used for winding;

[0013] A rolling composite device, the rolling composite device is located at the discharge end of the composite unwinding device, and the rolling composite device is used to roll-combine multiple coils from the composite unwinding device to form a pole piece;

[0014] A winding device is located at the discharge end of the rolling composite device, and is used to wind up the pole piece from the composite unwinding device.

[0015] Furthermore, the roll forming device comprises:

[0016] Forming rack;

[0017] Two forming rollers, the forming rollers are rotatably mounted on the forming frame, and a first preset gap is formed between the two forming rollers;

[0018] Two first limiting rollers, wherein the first limiting rollers are located on both sides of the two forming rollers, and the outer surfaces of the first limiting rollers are in contact with the forming rollers;

[0019] An oiling assembly, the oiling assembly is located in the feeding direction of the forming roller, and the oiling assembly is used to apply lubricating liquid to the forming roller;

[0020] A hair removal component, the hair removal component is located in the discharge direction of the forming roller, and the hair removal component is used to scrape off the pole piece material on the outer surface of the forming roller;

[0021] A plurality of first guide rollers, wherein the first guide rollers are rotatably mounted on the forming frame, and the first guide rollers are used to guide the pole piece film;

[0022] A tensioning adjustment device is installed on the forming frame, and the tensioning adjustment device is arranged on the pole piece film conveying path, and the tensioning adjustment device is used to provide tension for the pole piece film conveying.

[0023] Furthermore, the guide unwinding device comprises:

[0024] A mounting frame, the mounting frame being located on a downstream side of the roll-forming device;

[0025] A plurality of second guide rollers, the second guide rollers are rotatably mounted on the mounting frame, and the second guide rollers are used to guide the pole piece film initially formed by the roll forming device to the thinning device;

[0026] A first unwinding assembly, the first unwinding assembly is mounted on the mounting frame, and the first unwinding assembly is used to unwind the pole piece film wound from the composite unwinding device;

[0027] a first cutter, the first cutter being arranged on a path where the pole piece film is conveyed from the roll forming device, and the first cutter being used to remove burrs from the pole piece film;

[0028] A tensioning adjustment device is installed on the unwinding path of the first unwinding assembly, and is used to provide tension to the unwinding pole piece film.

[0029] Furthermore, the thinning device includes a thinning frame, on which two thinning rollers are rotatably mounted, a second preset gap is defined between the two thinning rollers, and two second limiting rollers are also rotatably mounted on the thinning frame, the thinning roller is located between the two second limiting rollers, the circumferential surface of the second limiting roller abuts against the circumferential surface of the thinning roller, and third guide rollers are rotatably mounted at the feed end and the discharge end of the thinning roller.

[0030] Furthermore, the composite unwinding device includes an unwinding frame, on which a plurality of fourth guide rollers are rotatably mounted, the fourth guide rollers guide the electrode film after thinning from the thinning device, and a second cutter is provided at the electrode film conveying path from the thinning device; a second unwinding assembly and a third unwinding assembly are installed on the unwinding frame, the third unwinding assembly is used for unwinding the electrode film used for the roller-pressed composite device and for winding up the electrode film after thinning from the thinning device, a plurality of fifth guide rollers are provided on the unwinding path of the second unwinding assembly, a plurality of sixth guide rollers are provided on the unwinding path of the third unwinding assembly, and a tensioning adjustment device is provided on the guide path of the fourth guide roller and the guide path of the sixth guide roller.

[0031] Furthermore, the roller-pressing composite device includes a composite frame, on which two composite rollers are rotatably mounted, a third preset gap is defined between the two composite rollers, a seventh guide roller is installed at the feed end and the discharge end of the composite roller, and a heating component is also provided at the feed end of the composite roller.

[0032] Furthermore, the winding device includes a winding frame, on which a plurality of eighth guide rollers are rotatably mounted, and the eighth guide rollers are used to guide the pole piece from the roller-pressed composite device. A winding shaft is also mounted on the winding frame, and the winding shaft is used to wind up the pole piece. A tensioning adjustment device is provided in the guide path of the eighth guide roller.

[0033] Furthermore, a surface density thickness measuring device is arranged between the roller-pressing composite device and the winding device, and the surface density thickness measuring device includes a machine platform, a linear module is fixedly installed on the machine platform, a surface density thickness gauge is installed at the transfer end of the linear module, and a ninth guide roller is also arranged on the machine platform.

[0034] Furthermore, the tensioning adjustment device includes a second mounting plate, on which a second rotating shaft is rotatably mounted, a swing arm is fixedly mounted on the circumferential surface of the second rotating shaft, a tensioning roller is rotatably mounted on the swing arm, a second rotating driving component is mounted on the rotation input end of the second rotating shaft, and a buffer is arranged on the rotation path of the swing arm.

[0035] The present application also provides a battery production line, which includes any of the above-mentioned electrode production equipment.

[0036] In the present application, when the thickness of the electrode film after the initial thinning by the thinning device cannot meet the requirements, it can be reeled in one of the unwinding positions of the composite unwinding device, and the electrode film roll that does not meet the requirements after rewinding can be transferred to the unwinding position of the guide unwinding device for unwinding, so that the electrode film can be thinned again by the thinning device until the requirements are met.

[0037] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the three-dimensional structure of the electrode production equipment of the present application is shown;

[0040] Figure 2 A schematic top view of the electrode production equipment of the present application is shown;

[0041] Figure 3 The schematic diagram of the structure of the roll forming device of the present application is shown;

[0042] Figure 4 A schematic diagram of the structure of the oiling assembly of the present application is shown;

[0043] Figure 5 A schematic diagram of the structure of the hair removal component of the present application is shown;

[0044] Figure 6 The schematic diagram of the structure of the guide unwinding device of the present application is shown;

[0045] Figure 7 A schematic diagram of the structure of the first unwinding assembly of the present application is shown;

[0046] Figure 8The schematic diagram of the structure of the thinning device of the present application is shown;

[0047] Fig. 9 A schematic diagram of a first state of the composite unwinding device of the present application is shown;

[0048] Fig.10 A schematic diagram of the second state of the composite unwinding device of the present application is shown;

[0049] Fig.11 The schematic diagram of the structure of the roller-pressing composite device of the present application is shown;

[0050] Fig.12 A schematic diagram of the heating assembly structure of the present application is shown;

[0051] Fig.13 The schematic diagram of the winding device structure of the present application is shown;

[0052] Fig.14 The schematic diagram of the structure of the surface density thickness measuring device of the present application is shown;

[0053] Fig.15 A schematic structural diagram of the tensioning adjustment device of the present application is shown.

[0054] Description of main component symbols:

[0055] 100-stirring and breaking device; 200-roller forming device; 210-forming frame; 220-forming roller; 230-first limiting roller; 240-oiling assembly; 241-first mounting plate; 242-contact block; 243-oil inlet pipe; 250-hair removal assembly; 251-first rotating shaft; 252-cutting plate; 253-fixing plate; 254-screwing piece; 255-first suction pipe; 260-first guide roller; 300-guide unwinding device; 310-mounting frame; 320-second guide roller ;330-first unwinding assembly;331-connecting plate;332-driven plate;333-first linear drive member;334-first rotary drive member;335-unwinding shaft;336-support assembly;3361-second linear drive member;3362-moving plate;33621-mounting groove;3363-bearing seat;3364-support shaft;3365-tightening bolt;340-first cutter;350-second suction pipe;360-guide rail;400-thinning device;410-thinning frame ;420-thinning roller;430-second limiting roller;440-third guide roller;500-compound unwinding device;510-unwinding frame;520-fourth guide roller;530-second cutter;540-second unwinding assembly;550-fifth guide roller;560-third unwinding assembly;570-sixth guide roller;600-roller composite device;610-compounding frame;620-compounding roller;630-seventh guide roller;640-heating assembly;641-lifting plate;642-third linear drive member; 643-heating lamp; 650-cooling roller; 700-winding device; 710-winding frame; 720-eighth guide roller; 730-winding shaft; 740-adjusting roller; 800-surface density thickness measuring device; 810-machine table; 820-linear module; 830-surface density thickness gauge; 840-ninth guide roller; 900-tensioning adjustment device; 910-second mounting plate; 920-second rotating shaft; 930-swing arm; 940-tensioning roller; 950-second rotating drive member; 960-buffer. DETAILED DESCRIPTION

[0056] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides an electrode production device, which includes a stirring and breaking up device 100, a roller forming device 200, a guide unwinding device 300, a thinning device 400, a composite unwinding device 500, a roller composite device 600 and a winding device 700.

[0062] In some embodiments, before use, the powdered electrode material is easily agglomerated due to accumulation, thereby affecting the subsequent forming and thinning processes. For this reason, the stirring and breaking device 100 is used to stir and break the electrode material, the roller forming device 200 is located at the discharge end of the stirring and breaking device 100, and the roller forming device 200 is used to roll the electrode material from the stirring and breaking device 100 into an electrode film. The guide unwinding device 300 is located in the downstream direction of the roller forming device 200, and the guide unwinding device 300 has at least one unwinding position. The thinning device 400 is located at the discharge end of the guide unwinding device 300. The device 400 thins the electrode film formed by the roll-forming device 200, the composite unwinding device 500 is located at the discharge end of the thinning device 400, the composite unwinding device 500 has at least two unwinding positions, wherein at least one of the two unwinding positions can realize the winding function, the roller-compounding device 600 is located at the discharge end of the composite unwinding device 500, the roller-compounding device 600 is used to roll-compound multiple coils from the composite unwinding device 500 to form electrode sheets, and the winding device 700 is located at the discharge end of the roller-compounding device 600, and the winding device 700 is used to wind up the electrode sheets from the composite unwinding device 500.

[0063] See also Figure 1 and Figure 2 As shown, in order to prevent the electrode material from agglomerating, the electrode material is stirred and dispersed by the stirring and dispersing device 100, so that it can be better fed. The dispersed material will enter the roll forming device 200, and the electrode material will be initially formed by the roll forming device 200, that is, the electrode material is rolled to form an electrode film. Next, the initially formed electrode film from the roll forming device 200 will pass through the guide unwinding device 300 and finally be transported to the thinning device 400. The initially formed electrode film is rolled and thinned again by the thinning device 400, so as to reduce the thickness of the electrode film to reach the predetermined thickness. Set the thickness and density, and then the thinned electrode film is transported to the rolling composite device 600 through the composite unwinding device 500. It should be noted that the composite unwinding device 500 has at least two unwinding stations, specifically two stations, one of which unwinds the collector aluminum foil, and the other unwinds the rolled electrode film. Then, the electrode film and the current collector from the unwinding station of the composite unwinding device 500 and the electrode film from the thinning device 400 are roll-compounded and connected in the rolling composite device 600. After the composite connection, the electrode is formed, and finally it is rolled up by the winding device 700. The above is the process of electrode production.

[0064] It should be noted that when the electrode film cannot meet the thickness requirement after roller thinning by the thinning device 400, the composite unwinding device 500 can realize the unwinding position for rewinding, and the electrode film roll after winding is transported to the unwinding position of the guide unwinding device 300, and then passes through the thinning device 400 for thinning again until the electrode film can meet the thickness requirement.

[0065] Furthermore, the electrode film unwound by the composite unwinding device 500 is located below the current collector, and the electrode film from the thinning device 400 is located above the current collector, that is, the electrode film is composited on both the upper and lower surfaces of the current collector to form a complete electrode.

[0066] In this embodiment, with the cooperation of the composite unwinding device 500 and the guided unwinding device 300, the electrode film that does not meet the requirements after the initial thinning by the thinning device 400 can be thinned again or multiple times, so that the thickness of the electrode film meets the use requirements.

[0067] In some embodiments, the stirring and dispersing device 100 includes a barrel (not shown in the figure), dispersing blades (not shown in the figure), a conveyor belt (not shown in the figure) and a motor (not shown in the figure), etc. Specifically, a dispersing blade is rotatably installed in the material channel, and the dispersing blade is installed on the rotating shaft of the motor. The dispersing blade is driven by the motor, and the material channel also has a discharge port, and a conveyor belt is provided at the discharge port. It can be understood that the motor drives the dispersing blade to rotate to disperse the electrode material in the barrel, and the dispersed electrode material is conveyed to the roller forming device 200 through the conveyor belt at the outlet for the initial forming of the electrode film. The above is the working process of the stirring and dispersing device 100.

[0068] It can be understood that the scattering blades can be scattering rods, that is, multiple scattering rods are evenly spaced on the outer surface of the motor shaft, so that the scattering function can also be achieved. Furthermore, in order to drive the scattering blades to rotate, a reducer can be installed on the output shaft of the motor. By reducing the speed of the motor, its torque is increased to provide sufficient power for scattering.

[0069] It should be noted that a heating device is provided between the conveyor belt and the roller forming device 200, and specifically, the electrode material can be heated in a preset infrared manner.

[0070] The roll forming device 200 includes a forming frame 210, two forming rollers 220, two first limiting rollers 230, an oiling assembly 240, a hair removal assembly 250, a plurality of first guide rollers 260 and a tensioning adjustment device 900, wherein the forming rollers 220 are rotatably mounted on the forming frame 210, a first preset gap is formed between the two forming rollers 220, the first limiting rollers 230 are located on both sides of the two forming rollers 220, the outer surface of the first limiting rollers 230 is in contact with the forming rollers 220, and the oiling assembly 240 is located in the feeding direction of the forming rollers 220. The oiling assembly 240 is used to apply lubricating liquid to the forming roller 220, the hair removal assembly 250, the hair removal assembly 250 is located in the discharge direction of the forming roller 220, the hair removal assembly 250 is used to scrape off the electrode material on the outer surface of the forming roller 220, the first guide roller 260 is rotatably installed on the forming frame 210, the first guide roller 260 is used to guide the electrode film, the tensioning adjustment device 900 is installed on the forming frame 210, the tensioning adjustment device 900 is set on the electrode film conveying path, the tensioning adjustment device 900 is used to provide tension for the electrode film conveying.

[0071] See also Figure 3 As shown, the electrode material from the stirring and breaking device 100 passes through the first preset gap between the two forming rollers 220 to initially form the electrode film. Since the extrusion molding of the electrode material can easily cause the forming roller 220 to deform, a first limiting roller 230 is provided at the position of each forming roller 220. The outer surface of the first limiting roller 230 is tightly attached to the forming roller 220 to prevent it from deforming.

[0072] Furthermore, the position of the formed electrode film is guided by a plurality of first guide rollers 260 so that it can be transported downstream along a preset route, and during the transportation process, the electrode film is always in a tensioned state by providing a tension adjustment device 900 to prevent wrinkles due to insufficient tension.

[0073] See also Figure 3 and Figure 4 As shown, in order to prevent the electrode material from sticking to the surface of the forming roller 220, an oiling assembly 240 is arranged above the forming roller 220. Specifically, the oiling assembly 240 includes a first mounting plate 241 fixedly mounted on the forming frame 210, and a contact block 242 is fixedly mounted on the bottom surface of the first mounting plate 241. The curvature of the surface of the contact block 242 is adapted to the forming roller 220, and the contact block 242 has an oil inlet and an oil outlet. It can be understood that the oil inlet is connected to the oil inlet pipe 243, and the oil outlet is toward the outer surface of the forming roller 220. The lubricating oil is coated on the surface of the forming roller 220 through the oil outlet, and the lubricating oil prevents the electrode material from sticking to the forming roller 220.

[0074] See also Figure 3 and5 A hair removal assembly 250 is provided below the forming roller 220, and the pole piece material that may exist on the outer surface of the forming roller 220 after film formation is removed by the hair removal assembly 250. Specifically, the hair removal assembly 250 includes a first rotating shaft 251, a cutting plate 252 is installed on the first rotating shaft 251, a fixing plate 253 is provided below the cutting plate 252, and a screwing member 254 is installed on the fixing plate 253. The distance between the cutting plate 252 and the outer surface of the forming roller 220 is adjusted by screwing the screwing member 254. Under the action of twisting, the cutting plate 252 contacts the surface of the forming roller 220. As the forming roller 220 rotates, the electrode material that may exist on its outer surface is scraped off under the action of the cutting plate 252 to prevent affecting the initial forming of the electrode film. A first suction pipe 255 is provided on one side of the cutting plate 252. The electrode material scraped off from the outer surface of the forming roller 220 is sucked under negative pressure through the first suction pipe 255. It can be understood that the first suction pipe 255 is connected to a negative pressure generating device, which can be a negative pressure machine, etc.

[0075] The guide unwinding device 300 includes a mounting frame 310, a plurality of second guide rollers 320, a first unwinding assembly 330, a first cutter 340, a second suction pipe 350 and a tensioning adjustment device 900, wherein the mounting frame 310 is located on the downstream side of the roll forming device 200, the second guide roller 320 is rotatably mounted on the mounting frame 310, the second guide roller 320 is used to guide the pole film initially formed from the roll forming device 200 to the thinning device 400, the first unwinding assembly 330 is mounted on the mounting frame 310, and the first unwinding assembly 330 is mounted on the mounting frame 310. Component 330 is used to unwind the electrode film wound from the composite unwinding device 500, the first cutter 340 is set on the path of conveying the electrode film from the roller forming device 200, the first cutter 340 is used to remove the burrs of the electrode film, the second suction pipe 350 is located on one side of the first cutter 340, the second suction pipe 350 is used to suck the burrs cut off by the first cutter 340, the tensioning adjustment device 900 is installed on the unwinding path of the first unwinding component 330, the tensioning adjustment device 900 is used to provide tension to the unwound electrode film.

[0076] See also Figure 6As shown, the electrode film initially formed by the roll forming device 200 is transported to the thinning device 400 for thinning through the path formed by each second guide roller 320. In the transport path, a first cutter 340 is installed on the mounting frame 310. The electrode film from the roll forming device 200 is trimmed by the first cutter 340 to remove the burrs or burrs that may exist on the outer surface of the initially formed electrode film to prevent affecting the final electrode quality. Correspondingly, a second extraction roller 320 is also provided on one side of the first cutter 340. The suction tube 350 sucks away the scraped burrs through the second suction tube 350. Furthermore, in order to be able to scrape the burrs or burrs at different positions, the guide rail 360 is installed on the mounting frame 310, and the first cutter 340 is slidably installed on the guide rail 360. The cutting position is changed by moving the first cutter 340. Correspondingly, the second suction tube 350 should also change with the position change of the first cutter 340, so that the suction port of the second suction tube 350 is located at the position of the first cutter 340.

[0077] Furthermore, in order to further thin the electrode film that does not meet the thickness requirement, a first unwinding assembly 330 is also installed on the mounting frame 310, and a plurality of second guide rollers 320 are also provided on the unwinding path of the first unwinding assembly 330. The unwinding path is guided by the second guide rollers 320. A tensioning adjustment device 900 is also installed on the unwinding path. The tensioning adjustment device 900 provides tension for the unwound electrode film to prevent wrinkles caused by insufficient tension from affecting the final molding effect.

[0078] See also Figure 7As shown, the first unwinding assembly 330 includes a connecting plate 331, a driven plate 332 is slidably mounted on the bottom surface of the connecting plate 331, a first linear driving member 333 is mounted on the upper surface of the connecting plate 331, a driving end of the first linear driving member 333 is connected to the driven plate 332, and the first linear driving member 333 drives the driven plate 332 to move linearly. Specifically, a first rotating driving member 334 is mounted on the driven plate 332, and an unwinding shaft 335 is mounted on the rotating shaft of the first rotating driving member 334. In the present embodiment, the unwinding shaft 335 is an inflatable shaft, and the unwinding shaft 335 is used to place the pole piece film roll that is thinned again. It can be understood that when the unwinding shaft 335 is unwinding, if the pole piece film is offset, the driven plate 332 is driven to move by the first linear driving member 333, thereby changing the position of the unwinding shaft 335. The position of the pole piece membrane is now corrected. The end face of the suspended side of the unwinding shaft 335 has a supporting hole for support. The suspended side of the unwinding shaft 335 is provided with a supporting assembly 336. The supporting assembly 336 includes a second linear drive member 3361. A moving plate 3362 is installed at the moving end of the second linear drive member 3361. A mounting groove 33621 is opened on the moving plate 3362 at the position of the unwinding shaft 335. A bearing seat 3363 is installed in the mounting groove 33621. The bearing seat 3363 is rotatably installed with a support shaft 3364. The diameter of the support shaft 3364 is adapted to the supporting hole, and tightening bolts 3365 are provided at the upper and lower directions of the bearing seat 3363. The height of the bearing seat 3363 is adjusted by tightening the bolts 3365, so that the support shaft 3364 can smoothly enter the supporting hole for support.

[0079] Furthermore, when it is necessary to place or remove the material roll on the unwinding shaft 335, first, the connection between the support shaft 3364 and the unwinding shaft 335 is released, that is, the support shaft 3364 withdraws from the support hole at the end of the unwinding shaft 335, and then the second linear drive member 3361 drives the movable plate 3362 to move so that the support shaft 3364 leaves the axial position of the unwinding shaft 335 to prevent collision with the support shaft 3364, the movable plate 3362 and other components during unloading.

[0080] In this embodiment, a tension sensor is provided at the position of the second guide roller 320 at the position of the first cutter 340, and the tension of the pole piece film at this time is detected by the sensor, so as to facilitate the tension adjustment device 900 to adjust the tension of the pole piece film. Furthermore, the second guide roller 320 at the position of the first cutter 340 is driven by a motor, specifically a servo motor.

[0081] The thinning device 400 includes a thinning frame 410, on which two thinning rollers 420 are rotatably mounted, and a second preset gap is defined between the two thinning rollers 420. Two second limiting rollers 430 are also rotatably mounted on the thinning frame 410, and the thinning roller 420 is located between the two second limiting rollers 430. The circumferential surface of the second limiting roller 430 abuts against the circumferential surface of the thinning roller 420. A third guide roller 440 is rotatably mounted at the feed end and the discharge end of the thinning roller 420.

[0082] participate Figure 8 As shown, the transported electrode film is thinned by two thinning rollers 420. Specifically, a second preset gap is formed between the two thinning rollers 420. The second preset gap is the thickness of the electrode film after thinning. This gap can be adjusted according to needs and is not limited here. In order to prevent the thinning roller 420 from deforming, a second limiting roller 430 is provided at the position of each thinning roller 420. The outer surface of the second limiting roller 430 contacts the outer surface of the thinning roller 420 to prevent the thinning roller 420 from deforming. It can be understood that the diameter of the second limiting roller 430 is larger than the diameter of the thinning roller 420, so that the second limiting roller 430 is more rigid and less prone to deformation.

[0083] Please continue reading Figure 8 As shown, in order to enable better loading and unloading, a third guide roller 440 is provided at the feeding port and the unloading port of the thinning roller 420, and the path of the electrode film before and after thinning is guided by the third guide roller 440.

[0084] See also Figure 8 As shown, both ends of the third guide roller 440 have a height adjustment structure, and the height adjustment structure can be manually slidable, that is, manual adjustment can be used to prevent the tilt angle of the third guide roller 440, thereby changing the parallelism of the pole piece membrane. Of course, the manual adjustment can be changed to automatic adjustment, for example, cylinder adjustment can be used. In practice, it can be designed according to needs, and there is no limitation here.

[0085] The composite unwinding device 500 includes an unwinding frame 510, on which a plurality of fourth guide rollers 520 are rotatably mounted, the fourth guide rollers 520 are used to guide the electrode film after thinning from the thinning device 400, and a second cutter 530 is arranged at the electrode film conveying path from the thinning device 400; a second unwinding assembly 540 and a third unwinding assembly 560 are installed on the unwinding frame 510, the third unwinding assembly 560 is used to unwind the electrode film used by the roller-pressing composite device 600 and to rewind the thinned electrode film from the thinning device 400, a plurality of fifth guide rollers 550 are arranged on the unwinding path of the second unwinding assembly 540, a plurality of sixth guide rollers 570 are arranged on the unwinding path of the third unwinding assembly 560, and a tensioning adjustment device 900 is arranged on the guide path of the fourth guide roller 520 and the guide path of the sixth guide roller 570.

[0086] See also Fig. 9 As shown, in order to be able to set the pole piece film on the upper and lower surfaces of the current collector, a second unwinding assembly 540 and a third unwinding assembly 560 are installed on the unwinding frame 510, the second unwinding assembly 540 is used to unwind the current collector, and the third unwinding assembly 560 is used to unwind the pole piece film, and a plurality of fourth guide rollers 520 are arranged above the second unwinding assembly 540, and the guide path formed by the fourth guide roller 520 is used to guide the pole piece film thinned by the thinning device 400, the guide path formed by the plurality of fifth guide rollers 550 guides the current collector from the second unwinding assembly 540, and the guide path formed by the plurality of sixth guide rollers 570 guides the pole piece film unwound from the third unwinding assembly 560, and the pole piece film guided by the fourth guide roller 520 and the sixth guide roller 570 and the current collector guided by the fifth guide roller 550 are finally gathered at the position of the rolling compounding device 600 and rolled and compounded.

[0087] Please continue reading Fig. 9 As shown, in this embodiment, a suction tube is also provided on one side of the second cutter 530. After the second cutter 530 removes the burrs or burrs on the outer surface of the electrode film, the removed burrs or burrs are sucked away by the suction tube to prevent the removed burrs or burrs from falling on the electrode film and causing damage to it.

[0088] like Fig.10 As shown, if the thickness of the electrode film after thinning by the thinning device 400 cannot meet the requirements, the electrode film is rolled up in the third unwinding assembly 560 of the composite unwinding device 500, and the electrode film that cannot meet the thickness requirements is guided to the position of the third unwinding assembly 560 for rolling up through the fourth guide roller 520, the fifth guide roller 550 and the sixth guide roller 570. The rolled electrode film is transported to the guide unwinding device 300 for re-rolling and thinning until it meets the use requirements.

[0089] In this embodiment, the structure of the third unwinding assembly 560 is the same as that of the first unwinding assembly 330 , and therefore, the structure of the third unwinding assembly 560 will not be described in detail herein.

[0090] The structure of the second unwinding component 540 can be composed of an unwinding air shaft, a brake, etc., and the unwinding speed is controlled by the magnetic powder brake.

[0091] In this embodiment, since there are multiple fourth guide rollers 520, fifth guide rollers 550 and sixth guide rollers 570, in order to facilitate the control of the unwinding tension, a corresponding tension sensor is installed at one of the fourth guide rollers 520, fifth guide rollers 550 and sixth guide rollers 570 to sense the tension of the electrode film and the current collector, thereby adjusting the tension.

[0092] The roller-pressed composite device 600 includes a composite frame 610, on which two composite rollers 620 are rotatably mounted, a third preset gap is defined between the two composite rollers 620, a seventh guide roller 630 is installed at the feed end and the discharge end of the composite roller 620, and a heating component 640 is also provided at the feed end of the composite roller 620.

[0093] See also Fig.11 As shown, two composite rollers 620 are installed on the composite frame 610, and a third preset gap is formed between the two composite rollers 620. Since the two composite rollers 620 need to rotate to roll and composite the current collector and the two pole piece films to form the pole piece, the third preset gap is the thickness of the pole piece.

[0094] Specifically, the seventh guide roller 630 needs to be provided at both the feeding end and the discharging end of the composite roller 620 , and the seventh guide roller 630 is used to guide the current collector and the electrode film as well as the composite-formed electrode.

[0095] Furthermore, in order to enable the electrode film on the upper and lower sides to be fully compounded on the current collector, a heating component 640 is set on the upper and lower sides of the feed port position of the third preset gap, and the electrode film on the upper and lower sides of the current collector is heated by the heating component 640, so that the electrode film can be fully compounded on the current collector.

[0096] In this example, please continue to refer to Fig.11 As shown, both ends of the seventh guide roller 630 are also provided with height adjustment structures. The height adjustment structure can refer to the height adjustment structure at both ends of the third guide roller 440, which will not be elaborated here.

[0097] In one embodiment, see Fig.12As shown, the heating component 640 includes a lifting plate 641, and both ends of the lifting plate 641 are provided with a third linear drive member 642. The lifting plate 641 is driven to move up and down by the linkage of the two third linear drives 642. A heating lamp 643 is provided on the side of the lifting plate 641 facing the electrode membrane. The electrode membrane is heated by irradiation with the heating lamp 643. It can be understood that when it is necessary to adjust the temperature of heating the electrode membrane, it is only necessary to control the power of the heating lamp 643, that is, when the temperature needs to be increased, the power of the heating lamp 643 is increased to produce a higher temperature to meet the needs of the electrode membrane. When the temperature needs to be reduced, it is only necessary to reduce the power of the heating lamp 643 to reduce the temperature. It should be noted here that the third linear drive member 642 drives the lifting plate 641 to change the position of the heating lamp 643 in order to avoid the electrode membrane and prevent it from direct contact with the electrode membrane.

[0098] Exemplarily, the third linear drive member 642 may be a cylinder.

[0099] Please continue reading Fig.11 As shown, since the electrode film after being compounded by the two compound rollers 620 still has a certain temperature, it is necessary to cool the electrode film. In order to cool the electrode film, a cooling roller 650 is provided at the outlet position of the compound roller 620. The cooling roller 650 cools the substrate film. Specifically, the cooling roller 650 has a channel for the passage of a coolant (specifically, water). After the coolant passes through, it carries the temperature of the electrode film passing through its surface, thereby achieving cooling.

[0100] The winding device 700 includes a winding frame 710, on which a plurality of eighth guide rollers 720 are rotatably mounted, and the eighth guide rollers 720 are used to guide the pole pieces from the rolling composite device 600. A winding shaft 730 is also mounted on the winding frame 710, and the winding shaft 730 is used to wind up the pole pieces. A tensioning adjustment device 900 is provided in the guide path of the eighth guide roller 720.

[0101] See also Fig.13 As shown, a winding shaft 730 and a plurality of eighth guide rollers 720 are installed on the winding frame 710, and the pole piece from the rolling composite device 600 is guided to the position of the winding shaft 730 for winding through the eighth guide roller 720. Specifically, the winding shaft 730 can be composed of a motor and a winding shaft, and the motor drives the winding shaft to rotate to realize the winding of the pole piece. Furthermore, in order to ensure the tension of the winding shaft 730 when winding the pole piece, a tensioning adjustment device 900 is arranged in the guide path of the eighth guide roller 720, and the tensioning adjustment device 900 is used to provide tension for winding the pole piece.

[0102] Please continue reading Fig.13As shown, there is an adjusting roller 740 before the winding shaft 730 is wound. Height adjusting parts can be set at both ends of the roller body of the adjusting roller 740. The height adjusting parts can be a manual slide or a cylinder to achieve height adjustment, thereby adjusting the inclination angle of the roller body so that the pole piece is wound parallel to the winding shaft 730.

[0103] A surface density thickness measuring device 800 is arranged between the roller-pressing composite device 600 and the winding device 700. The surface density thickness measuring device 800 includes a machine platform 810, on which a linear module 820 is fixedly installed. A surface density thickness gauge 830 is installed at the transfer end of the linear module 820. A ninth guide roller 840 is also arranged on the machine platform 810.

[0104] See also Fig.14 As shown, the surface density thickness gauge 830 is driven to move by the linear module 820, so that the detection port of the surface density thickness gauge 830 is located between the two ninth guide rollers 840, and the surface density thickness gauge 830 is driven to move by the linear module 820 to measure pole pieces of different widths. In this embodiment, the pole piece is guided by the ninth guide roller 840.

[0105] The tensioning adjustment device 900 includes a second mounting plate 910, on which a second rotating shaft 920 is rotatably mounted, a swing arm 930 is fixedly mounted on the circumference of the second rotating shaft 920, a tensioning roller 940 is rotatably mounted on the swing arm 930, a second rotating driving member 950 is mounted at the rotation input end of the second rotating shaft 920, and a buffer 960 is arranged on the rotation path of the swing arm 930.

[0106] See also Fig.15 As shown, the tensioning adjustment device 900 mentioned above is mainly used to provide a certain tensioning force to the film roll. Specifically, the film roll is wound on the outer surface of the tensioning roller 940, and the second rotating shaft 920 is driven to rotate by the second rotating drive member 950, thereby driving the swing arm 930 and the tensioning roller 940 to swing within a preset angle, thereby achieving the adjustment of the tensioning force of the film roll. In order to limit the swing angle of the paper swing arm 930 and the tensioning roller 940, a buffer 960 is set on the rotation and swinging path of the swing arm 930 to achieve angle control. In this embodiment, in order to accurately control the swing angle of the swing arm 930 and the tensioning roller 940, the second rotating drive member 950 is selected as a servo motor.

[0107] The embodiment of the present application also includes a mold temperature controller, through which hot oil is delivered to each roller shaft, thereby heating the material and controlling the temperature of each working roller to reach a predetermined temperature to meet working needs.

[0108] An embodiment of the present application also provides a battery production line, which includes any of the above-mentioned electrode production equipment.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0110] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A pole piece production equipment, characterized in that: include: A stirring and breaking device (100), wherein the stirring and breaking device (100) is used to stir and break the electrode material; A roller forming device (200), the roller forming device (200) being located at the discharge end of the stirring and breaking device (100), and the roller forming device (200) being used for rolling the electrode material from the stirring and breaking device (100) into an electrode film; A guide unwinding device (300), the guide unwinding device (300) being located in the downstream direction of the roll-forming device (200), and the guide unwinding device (300) having at least one unwinding position; a thinning device (400), the thinning device (400) being located at the discharge end of the guide unwinding device (300), and the thinning device (400) thinning the electrode film formed by the roller forming device (200); A composite unwinding device (500), the composite unwinding device (500) being located at the discharge end of the thinning device (400), the composite unwinding device (500) having at least two unwinding positions, at least one of the two unwinding positions realizing winding; A rolling composite device (600), the rolling composite device (600) being located at the material discharging end of the composite unwinding device (500), the rolling composite device (600) being used to roll-combine a plurality of coils from the composite unwinding device (500) to form a pole piece; A winding device (700), the winding device (700) is located at the discharge end of the rolling composite device (600), and the winding device (700) is used to wind up the pole piece from the composite unwinding device (500).

2. The pole piece production equipment according to claim 1, characterized in that: The roll forming device (200) comprises: Forming frame (210); two forming rollers (220), the forming rollers (220) being rotatably mounted on the forming frame (210), and a first preset gap being formed between the two forming rollers (220); Two first limiting rollers (230), wherein the first limiting rollers (230) are located on both sides of the two forming rollers (220), and the outer surfaces of the first limiting rollers (230) are in contact with the forming rollers (220); an oiling assembly (240), the oiling assembly (240) being located in the feeding direction of the forming roller (220), and the oiling assembly (240) being used to apply lubricating liquid to the forming roller (220); a hair removal component (250), the hair removal component (250) being located in the material discharging direction of the forming roller (220), and the hair removal component (250) being used to scrape off the pole piece material on the outer surface of the forming roller (220); a plurality of first guide rollers (260), wherein the first guide rollers (260) are rotatably mounted on the forming frame (210), and the first guide rollers (260) are used to guide the pole piece film; A tensioning adjustment device (900), the tensioning adjustment device (900) is installed on the forming frame (210), the tensioning adjustment device (900) is arranged on the pole piece film conveying path, and the tensioning adjustment device (900) is used to provide tension for conveying the pole piece film.

3. The pole piece production equipment according to claim 1, characterized in that: The guide unwinding device (300) comprises: A mounting frame (310), the mounting frame (310) being located on a downstream side of the roll-forming device (200); a plurality of second guide rollers (320), wherein the second guide rollers (320) are rotatably mounted on the mounting frame (310), and the second guide rollers (320) are used to guide the pole piece film initially formed by the roll forming device (200) to the thinning device (400); a first unwinding assembly (330), the first unwinding assembly (330) being mounted on the mounting frame (310), and the first unwinding assembly (330) being used to unwind the pole piece film wound up from the composite unwinding device (500); a first cutter (340), the first cutter (340) being arranged on a path along which the electrode film is conveyed from the roll-forming device (200), the first cutter (340) being used to remove burrs from the electrode film; a second suction pipe (350), the second suction pipe (350) being located on one side of the first cutter (340), and the second suction pipe (350) being used to suck the burrs cut off by the first cutter (340); A tensioning adjustment device (900), wherein the tensioning adjustment device (900) is installed on the unwinding path of the first unwinding assembly (330), and the tensioning adjustment device (900) is used to provide tension to the unwinding pole piece film.

4. The pole piece production equipment according to claim 1, characterized in that: The thinning device (400) comprises a thinning frame (410), on which two thinning rollers (420) are rotatably mounted, a second preset gap is defined between the two thinning rollers (420), and two second limiting rollers (430) are also rotatably mounted on the thinning frame (410), the thinning roller (420) is located between the two second limiting rollers (430), the circumference of the second limiting roller (430) is in contact with the circumference of the thinning roller (420), and third guide rollers (440) are rotatably mounted at both the feeding end and the discharging end of the thinning roller (420).

5. The pole piece production equipment according to claim 1, characterized in that: The composite unwinding device (500) comprises an unwinding frame (510), on which a plurality of fourth guide rollers (520) are rotatably mounted, and the fourth guide rollers (520) are used to guide the electrode film after thinning from the thinning device (400), and a second cutter (530) is provided at the conveying path of the electrode film from the thinning device (400); a second unwinding assembly (540) and a third unwinding assembly (560) are mounted on the unwinding frame (510), and the second unwinding assembly (540) is used to cut the current collector. Unwinding, the third unwinding assembly (560) is used for unwinding the pole piece film used by the roller-pressed composite device (600) and for winding up the pole piece film after thinning from the thinning device (400), a plurality of fifth guide rollers (550) are arranged on the unwinding path of the second unwinding assembly (540), a plurality of sixth guide rollers (570) are arranged on the unwinding path of the third unwinding assembly (560), and a tensioning adjustment device (900) is arranged on the guide path of the fourth guide roller (520) and the guide path of the sixth guide roller (570).

6. The pole piece production equipment according to claim 1, characterized in that: The roller-pressing composite device (600) comprises a composite frame (610), on which two composite rollers (620) are rotatably mounted, a third preset gap is defined between the two composite rollers (620), a seventh guide roller (630) is mounted at both the feed end and the discharge end of the composite roller (620), and a heating component (640) is also provided at the feed end of the composite roller (620).

7. The pole piece production equipment according to claim 1, characterized in that: The winding device (700) comprises a winding frame (710), on which a plurality of eighth guide rollers (720) are rotatably mounted, and the eighth guide rollers (720) are used to guide the pole piece from the rolling composite device (600). A winding shaft (730) is also mounted on the winding frame (710), and the winding shaft (730) is used to wind up the pole piece. A tension adjustment device (900) is provided in the guide path of the eighth guide roller (720).

8. The pole piece production equipment according to claim 1, characterized in that: A surface density thickness measuring device (800) is arranged between the rolling composite device (600) and the winding device (700), and the surface density thickness measuring device (800) comprises a machine platform (810), a linear module (820) is fixedly mounted on the machine platform (810), a surface density thickness gauge (830) is mounted on the transfer end of the linear module (820), and a ninth guide roller (840) is also arranged on the machine platform (810).

9. The pole piece production equipment according to claim 2 or 3 or 5 or 7, characterized in that: The tensioning adjustment device (900) comprises a second mounting plate (910), a second rotating shaft (920) is rotatably mounted on the second mounting plate (910), a swing arm (930) is fixedly mounted on the circumference of the second rotating shaft (920), a tensioning roller (940) is rotatably mounted on the swing arm (930), a second rotating driving member (950) is mounted on the rotation input end of the second rotating shaft (920), and a buffer (960) is arranged on the rotation path of the swing arm (930).

10. A battery production line, characterized in that: The electrode production equipment comprises the electrode production equipment as described in any one of claims 1 to 9.

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