A pole piece production equipment and battery production line

Abstract

The present application relates to the field of battery production, and discloses a pole piece production equipment and a battery production line. The pole piece production equipment includes a stirring and breaking up device, a roller forming device, a guide unwinding device, a thinning device, a composite unwinding device, a roller composite device, and a winding device. The stirring and breaking up device is used to stir and break up the pole piece material. The guide unwinding device has at least one unwinding position. The thinning device thins the pole piece film formed by the roller forming device. The composite unwinding device has at least two unwinding positions, and at least one of the two unwinding positions is used for winding. In the present application, when the thickness of the pole piece film after the initial thinning by the thinning device cannot meet the requirements, it can be wound at one of the unwinding positions of the composite unwinding device, and the pole piece film roll that does not meet the requirements after winding is transferred to the unwinding position of the guide unwinding device for unwinding, so that the pole piece film is thinned again by the thinning device until the requirements are 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-process electrode production technology, current mainstream equipment mostly utilizes an integrated, continuous roller design, integrating multiple processes such as film formation, thinning, and lamination. Alignment during the lamination process in this type of equipment relies heavily on visual inspection and manual adjustment, resulting in a low level of automation. Although split-type dry-process electrode production equipment attempts to separate functional modules to enhance flexibility, functional integration and automated control still require improvement.

[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 downstream of the roll-forming device, and the guide unwinding device has at least one unwinding position;

[0011] A thinning device, located at the discharge end of the guide unwinding device, and thinning 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 roller-pressing composite device, located at the discharge end of the composite unwinding device, for performing roller-pressing composite on a plurality of coils from the composite unwinding device to form pole pieces;

[0014] A winding device is located at the discharge end of the roller-pressing 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, 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 being located in the feed direction of the forming roller and being used to apply lubricating liquid to the forming roller;

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

[0021] a plurality of first guide rollers, each of which is rotatably mounted on the forming frame and is 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. The tensioning adjustment device is used to provide tension for the pole piece film conveying.

[0023] Furthermore, the guide unwinding device includes:

[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 being rotatably mounted on the mounting frame, the second guide rollers being 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 being mounted on the mounting frame and being used to unwind the electrode film wound up from the composite unwinding device;

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

[0029] Furthermore, the thinning device includes a thinning frame, on which two thinning rollers are rotatably mounted, and a second preset gap is defined between the two thinning rollers. Two second limiting rollers are also rotatably mounted on the thinning frame, and 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 on 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 guiding 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 to unwind the electrode film used for the roller-pressed composite device and to rewind 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, and a tensioning adjustment device is provided in the guide path of the eighth guide roller.

[0033] Furthermore, a surface density thickness measuring device is provided between the roller-pressing composite device and the winding device. 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 provided on the machine platform.

[0034] Furthermore, the tensioning adjustment device includes a second mounting plate, a second rotating shaft is rotatably mounted on the second mounting plate, a swing arm is fixedly mounted on the circumference of the second rotating shaft, a tensioning roller is rotatably mounted on the swing arm, a second rotating drive component is mounted on the rotation input end of the second rotating shaft, and a buffer is provided 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 this application, when the thickness of the electrode film after the initial thinning by the thinning device cannot meet the requirements, it can be rewound at 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 is thinned again by the thinning device until it meets the requirements.

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

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 Shows a schematic diagram of the three-dimensional structure of the electrode production equipment of the present application;

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

[0041] Figure 3 Shows a schematic structural diagram of the roll forming device of the present application;

[0042] Figure 4 Shows a schematic structural diagram of the oiling assembly of the present application;

[0043] Figure 5 Shows a schematic structural diagram of the hair removal component of the present application;

[0044] Figure 6 Shows a schematic structural diagram of the guided unwinding device of the present application;

[0045] Figure 7 Shows a schematic structural diagram of the first unwinding assembly of the present application;

[0046] Figure 8Shows a schematic structural diagram of the thinning device of the present application;

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

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

[0049] Figure 11 Shows a schematic structural diagram of the roller-pressing composite device of the present application;

[0050] Figure 12 Shows a schematic diagram of the heating component structure of the present application;

[0051] Figure 13 Shows a schematic structural diagram of the winding device of the present application;

[0052] Figure 14 Shows a schematic structural diagram of the surface density thickness measuring device of the present application;

[0053] Figure 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-abutment block; 243-oil inlet pipe; 250-hair removal assembly; 251-first rotating shaft; 252-cutting plate; 253-fixing plate; 254-screwing member; 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-compounding 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-area density thickness measuring device; 810-machine table; 820-linear module; 830-area 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 following describes in detail embodiments of the present application. 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 are not to be construed 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 device or element referred to 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] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0059] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0060] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] See 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, the powdered electrode material is prone to agglomeration due to accumulation before use, thereby affecting the subsequent forming and thinning process. 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-pressing composite device 600 is located at the discharge end of the composite unwinding device 500, the roller-pressing composite device 600 is used to roll-press and composite multiple rolls from the composite unwinding device 500 to form electrode sheets, and the winding device 700 is located at the discharge end of the roller-pressing composite 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 breaking 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 wound electrode film. Then, the electrode film and the 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 wound 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 requirements after rolling and thinning by the thinning device 400, the electrode film roll can be rewound at the unwinding position by the composite unwinding device 500. The electrode film roll after rewinding is transported to the unwinding position of the guide unwinding device 300, and then thinned again by the thinning device 400 until the electrode film can meet the thickness requirements.

[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 films are 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 breaking up device 100 includes a barrel (not shown in the figure), breaking up 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 breaking up blade is rotatably installed in the material channel, and the breaking up blade is installed on the rotating shaft of the motor. The breaking up 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 breaking up blade to rotate to break up the electrode material in the barrel, and the broken up electrode material is conveyed to the roller forming device 200 through the conveyor belt at the outlet for the initial forming of the electrode membrane. The above is the working process of the stirring and breaking up 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 be able to drive the scattering blades to rotate, a reducer can be installed on the output shaft of the motor. By decelerating the motor, the speed of the motor is reduced and its torque is increased, thereby providing 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 an infrared preset 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. 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, and the outer surfaces of the first limiting rollers 230 abut against the forming rollers 220. The oiling assembly 240 is located in the feeding direction of the forming rollers 220. The oiling component 240 is used to apply lubricating liquid to the forming roller 220, the hair removal component 250, the hair removal component 250 is located in the discharge direction of the forming roller 220, the hair removal component 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 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 set 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 multiple 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 setting a tensioning 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 adhering 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 abutment blocks 242 are fixedly mounted on the bottom surface of the first mounting plate 241. The curvature of the surface of the abutment block 242 is adapted to the forming roller 220, and the abutment 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 electrode material is prevented from adhering to the forming roller 220 under the action of the lubricating oil.

[0074] See Figure 3 and5 A hair removal assembly 250 is provided below the forming roller 220. The hair removal assembly 250 removes the electrode material that may exist on the outer surface of the forming roller 220 after the film is formed. 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. A screw 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 screw 254. Under the action of screwing, 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 membrane. A first suction pipe 255 is provided on one side of the cutting plate 252. The electrode material scraped off 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 electrode 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, the first unwinding assembly 330 is mounted on the mounting frame 310, and the first unwinding assembly 350 is mounted on the first unwinding assembly 350. 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 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. Accordingly, a second extraction roller is provided on one side of the first cutter 340. The suction pipe 350 sucks away the scraped burrs through the second suction pipe 350. Furthermore, in order to be able to remove burrs or burrs at different positions, a 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. Accordingly, the second suction pipe 350 should also change with the position change of the first cutter 340, so that the suction port of the second suction pipe 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 requirements, 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 due to 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 installed on the bottom surface of the connecting plate 331, and a first linear driving member 333 is installed on the upper surface of the connecting plate 331. The 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 installed on the driven plate 332, and an unwinding shaft 335 is installed on the rotating shaft of the first rotating driving member 334. In this embodiment, the unwinding shaft 335 is an inflatable shaft. The unwinding shaft 335 is used to place the electrode film roll that is thinned again. It can be understood that when the unwinding shaft 335 is unwinding, if the electrode 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 electrode membrane is now corrected. The end face of the suspended side of the unwinding shaft 335 has a support hole for support, and a support assembly 336 is provided on the suspended side of the unwinding shaft 335. The support assembly 336 includes a second linear drive member 3361, and a movable plate 3362 is installed on the movable end of the second linear drive member 3361. A mounting groove 33621 is provided on the movable plate 3362 at the position of the unwinding shaft 335, and a bearing seat 3363 is installed in the mounting groove 33621. The bearing seat 3363 is rotatably installed with a support shaft 3364, and the diameter of the support shaft 3364 is adapted to the support hole, and tightening bolts 3365 are provided at the upper and lower positions 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 support hole for support.

[0079] Furthermore, when it is necessary to place or remove the material roll on the unwinding shaft 335, first release the connection between the support shaft 3364 and the unwinding shaft 335, 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 components such as the support shaft 3364 and the movable plate 3362 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 sensor is used to detect the tension of the electrode film at this time, thereby facilitating the tension adjustment device 900 to adjust the tension of the electrode 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 each thinning roller 420 position. 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 and unloading ports 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 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 from being achieved, thereby changing the parallelism of the pole piece membrane. Of course, the manual adjustment can also 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 guide the electrode film after thinning from the thinning device 400, and a second cutter 530 is provided 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, and 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 provided on the unwinding path of the second unwinding assembly 540, a plurality of sixth guide rollers 570 are provided on the unwinding path of the third unwinding assembly 560, and a tensioning adjustment device 900 is provided on the guide path of the fourth guide roller 520 and the guide path of the sixth guide roller 570.

[0086] See Figure 9 As shown, in order to be able to set the electrode 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 electrode film. A plurality of fourth guide rollers 520 are arranged above the second unwinding assembly 540. The guide path formed by the fourth guide roller 520 is used to guide the electrode film after thinning from 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. The guide path formed by the plurality of sixth guide rollers 570 guides the electrode film unwound from the third unwinding assembly 560. The electrode 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 Figure 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 membrane, the removed burrs or burrs are sucked away by the suction tube to prevent the removed burrs or burrs from falling on the electrode membrane and causing damage to it.

[0088] like Figure 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 rewound 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 rewinding 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-unwinding 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 here.

[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-pressing 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, and a seventh guide roller 630 is installed at the feed end and the discharge end of the composite roller 620. A heating component 640 is also provided at the feed end of the composite roller 620.

[0093] See Figure 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 electrode films to form the electrode, the third preset gap is the thickness of the electrode.

[0094] Specifically, a seventh guide roller 630 needs to be provided at both the feeding and discharging ends of the composite roller 620 , and the current collector and the electrode film as well as the composite-formed electrode are guided by the seventh guide roller 630 .

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

[0096] In this example, please continue to refer to Figure 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 Figure 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 up and down by the linkage of the two third linear drive members 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 of the heating lamp 643. It can be understood that when it is necessary to adjust the temperature of the heating of 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 lowered, it is only necessary to reduce the power of the heating lamp 643 to lower the temperature. It should be noted here that the third linear drive member 642 drives the lifting plate 641 and changes 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] For example, the third linear driving member 642 may be a cylinder.

[0099] Please continue reading Figure 11 As shown, since the electrode film still has a certain temperature after being compounded by the two compound rollers 620, the electrode film needs to be cooled. In order to cool the electrode film, a cooling roller 650 is provided at the outlet position of the compound roller 620. The substrate film is cooled by the cooling roller 650. Specifically, the cooling roller 650 has a channel for the passage of cooling liquid (specifically, water). After the cooling liquid 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. The eighth guide rollers 720 are used to guide the pole pieces from the roller-pressing composite device 600. A winding shaft 730 is also mounted on the winding frame 710. The winding shaft 730 is used to wind the pole pieces. A tensioning adjustment device 900 is provided in the guide path of the eighth guide roller 720.

[0101] See Figure 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 provided 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 Figure 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 Figure 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 drive 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 Figure 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 adjusting the tensioning force of the film roll. In order to limit the swinging angle of the paper swing arm 930 and the tensioning roller 940, a buffer 960 is set on the rotation swinging path of the swing arm 930 to achieve angle control. In this embodiment, in order to accurately control the swinging 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, which delivers hot oil to each roller shaft through the mold temperature controller, 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" 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of 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), the stirring and breaking device (100) is used to stir and break up the electrode material; A roller forming device (200), the roller forming device (200) being located at the discharge end of the stirring and breaking up device (100), the roller forming device (200) being used to roller-press the electrode material from the stirring and breaking up device (100) into an electrode film; A guide unwinding device (300), the guide unwinding device (300) is located in the downstream direction of the roll-forming device (200), and the guide unwinding device (300) has 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 being capable of rewinding; A rolling composite device (600), the rolling composite device (600) being located at the discharge 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 pole pieces; A winding device (700), the winding device (700) is located at the discharge end of the roller-pressing composite device (600), and the winding device (700) is used to wind the pole piece from the composite unwinding device (500); The composite unwinding device (500) comprises an unwinding frame (510), on which a plurality of fourth guide rollers (520) are rotatably mounted. The fourth guide rollers (520) guide the electrode film after thinning from the thinning device (400), and a second cutter (530) is provided at the electrode film conveying path from the thinning device (400); a second unwinding assembly (540) and a third unwinding assembly (560) are mounted on the unwinding frame (510), wherein the second unwinding assembly (540) is used to discharge the current collector. The third unwinding assembly (560) is used to unwind the electrode film used by the roll-pressing composite device (600) and to rewind the electrode film after thinning from the thinning device (400); a plurality of fifth guide rollers (550) are provided on the unwinding path of the second unwinding assembly (540); a plurality of sixth guide rollers (570) are provided on the unwinding path of the third unwinding assembly (560); and a tensioning adjustment device (900) is provided on the guide path of the fourth guide roller (520) and the guide path of the sixth guide roller (570); When the electrode film after roller thinning by the thinning device (400) cannot meet the thickness requirement, the electrode film roll is rewound at the unwinding position that can be rewound by the composite unwinding device (500), and the electrode film roll after rewinding 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.

2. The electrode production equipment according to claim 1, characterized in that: The roll forming device (200) comprises: Forming rack (210); Two forming rollers (220), the forming rollers (220) being rotatably mounted on the forming frame (210), with a first preset gap being formed between the two forming rollers (220); Two first limiting rollers (230), the first limiting rollers (230) being located on both sides of the two forming rollers (220), and the outer surfaces of the first limiting rollers (230) being 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 discharge 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) 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 electrode 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), the second guide rollers (320) being rotatably mounted on the mounting frame (310), the second guide rollers (320) being 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 electrode film wound 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 tube (350), the second suction tube (350) being located on one side of the first cutter (340), and the second suction tube (350) being used to suck the burrs cut off by the first cutter (340); A 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 unwound pole piece film.

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

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

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

7. The electrode production equipment according to claim 1, characterized in that: A surface density thickness measuring device (800) is provided between the roller-pressing laminating device (600) and the winding device (700). 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). A ninth guide roller (840) is also provided on the machine platform (810).

8. The electrode production equipment according to claim 1, 2, 3 or 6, 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 provided on the rotation path of the swing arm (930).

9. A battery production line, characterized in that: The electrode production equipment includes any one of claims 1 to 8.

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