Fibrosis apparatus and dry film forming apparatus

Abstract

The utility model provides fibration equipment and dry-method film forming equipment, the fibration equipment comprises a fibration mechanism, a feeding mechanism and a cutting and screening mechanism, the fibration mechanism comprises two fibration rollers which are oppositely arranged, a feeding gap is formed between the two fibration rollers, and the feeding gap comprises a feeding end and a discharging end; the feeding mechanism is positioned above the feeding end; the cutting and screening mechanism is located below the discharging end and comprises a stock bin, a crushing component and a screen, the screen is located below the crushing component, certain extrusion force and shearing force are applied to materials flowing through the feeding gap through oppositely-arranged fibration rollers, the materials are fibration under the condition that the materials are not strongly impacted, the materials can be fibration effectively, and the fibration effect is good. The condition that the material particles are damaged due to strong impact is avoided; the pre-fiberized materials are crushed through the crushing part, the particle size of the materials falling from the bottom of the stock bin can be controlled through the screen, and the particle size consistency of the pre-fiberized particles is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry electrode process, in particular to a fiberization device and a dry film forming device. BACKGROUND

[0002] In the dry electrode process, the pre-fiberization of the binder is very crucial. The commonly used fiberization methods at present include high-speed airflow method (such as airflow mill, fluidized bed, etc.) or high-speed mechanical shearing method. These methods all input high mechanical energy into the dry mixed material in the form of impact, so that the binder is fiberized under stress. However, the high mechanical energy in this way will cause damage to the material particles, resulting in problems such as interlayer peeling of graphite, crushing of ternary active materials, and falling of the carbon coating layer on the surface of lithium iron phosphate material. In addition, the pre-fiberized material is a sticky agglomerate, so that the consistency of the particle size of the pre-fiberized particles is poor, which is not conducive to the consistency of the subsequent feeding film forming, and the large agglomerates will cause material bridging, seriously affecting the subsequent film forming process.

[0003] Therefore, how to provide a new fiberization method is a problem to be solved. CONTENT OF THE INVENTION

[0004] Therefore, the purpose of the present application is to provide a fiberization device and a dry film forming device.

[0005] To achieve the above purpose, the first aspect of the present application provides a fiberization device, comprising:

[0006] a fiberization mechanism comprising two fiberization rollers arranged oppositely, a feeding gap being formed between the two fiberization rollers, the feeding gap comprising a feeding end and a discharging end;

[0007] a feeding mechanism located above the feeding end for feeding material to the feeding end;

[0008] a cutting and screening mechanism located below the discharging end, comprising a hopper, a crushing component and a screen, the crushing component and the screen being located in the hopper, the screen being located below the crushing component, the hopper being used for receiving material flowing out of the discharging end, the crushing component being used for crushing the material received by the hopper, and the screen being used for screening the material crushed by the crushing component.

[0009] Optionally, the fiberization mechanism further comprises two driving members, the two driving members being connected with the two fiberization rollers respectively, and the driving members being used for driving the corresponding fiberization rollers to rotate.

[0010] Optionally, the cutting and screening mechanism further comprises a driving motor, an output shaft of the driving motor extending into the hopper through the side wall of the hopper, and the crushing component being fixedly arranged on the output shaft.

[0011] Optionally, the crushing components are provided in plurality, and are arranged in intervals along the extension direction of the output shaft.

[0012] Optionally, the screens are provided in plurality, and are arranged in intervals along the direction from the feeding mechanism to the cutting-screening mechanism, and the mesh size of the screen holes gradually decreases.

[0013] Optionally, each of the fiberizing rollers is internally provided with a heating assembly for heating the fiberizing roller.

[0014] Optionally, the bunker is internally provided with a cooling interlayer for passing cooling medium.

[0015] Optionally, the size of the feeding gap is 100-5000 um; and / or the outer diameter of the fiberizing roller is 100-600 mm; and / or the mesh size of the screen holes is less than or equal to 500 mesh.

[0016] The second aspect of the present application provides a dry film forming device, comprising the fiberizing device of any one of the first aspect.

[0017] Optionally, further comprising a feeding mechanism and a film forming mechanism.

[0018] The feeding mechanism is located below the cutting-screening mechanism, and comprises a feeding channel, the feeding channel comprising a feeding port, a feeding gap and a discharging port arranged in sequence, and the feeding channel is configured to allow the material flowing out of the cutting-screening mechanism to enter from the feeding port and flow out of the discharging port along the feeding gap.

[0019] The film forming mechanism is located below the discharging port, and is configured to receive the material flowing out of the discharging port and calender the material into a finished film.

[0020] From the above, it can be seen that the fiberization device and the dry film forming device provided by the application, the fiberization device, comprises a fiberization mechanism, two fiberization rollers arranged oppositely, a feeding gap formed between the two fiberization rollers, the feeding gap comprising a feeding end and a discharging end; a feeding mechanism located above the feeding end for feeding the feeding end; a cutting and screening mechanism located below the discharging end, comprising a hopper, a crushing component and a screen, by the relatively arranged fiberization rollers, a certain extrusion force and shear force are applied to the material flowing through the feeding gap, so that the material is fiberized without being subjected to strong impact, which can effectively fiberize the material and avoid the damage of the material particles caused by strong impact. At the same time, the pre-fiberized material flowing out of the discharging end is crushed by the crushing component in the cutting and screening mechanism, which can avoid the material from caking, and the crushed material is screened by the screen in the cutting and screening mechanism to control the particle size of the material falling from the bottom of the hopper, which improves the particle size consistency of the pre-fiberized particles. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the application or related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 A front view of the fiberization device of the embodiment of the application is shown;

[0023] Figure 2 A front view of the fiberization device of the embodiment of the application when fiberizing the material is shown;

[0024] Figure 3 A principle schematic view of the fiberization device of the embodiment of the application when fiberizing the material is shown;

[0025] Figure 4 A structural schematic view of the fiberization device of the embodiment of the application is shown;

[0026] Figure 5 A structural schematic view of the dry film forming device of the embodiment of the application is shown.

[0027] In the drawings: 100, fiberization mechanism; 101, fiberization roller; 102, feeding gap; 103, driving member; 1021, feeding end; 1022, discharging end; 200, feeding mechanism; 300, cutting and screening mechanism; 301, hopper; 302, crushing component; 303, screen; 304, driving motor; 3041, output shaft; 1, feeding mechanism; 2, film forming mechanism. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to specific embodiments and drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by those with ordinary skills in the art to which the present application belongs. The terms "first", "second" and similar terms used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0030] The dry electrode process technology does not require solvent-assisted electrode processing, eliminating the corresponding drying and solvent recovery processes and devices, which can greatly reduce the investment cost of lithium battery projects, the cost of electrode manufacturing, and the unit carbon emission of products. Since the technology was introduced, dry electrode equipment has undergone several iterations, and the design maturity is increasingly close to mass production.

[0031] The mainstream of dry electrode preparation adopts the binder fiberization method, which is to add active material and conductive agent powder to the solid binder to form dry mixed material, then apply high shear force to fiberize the binder to bond the powder, then compact and thin the binder by extrusion to form a self-supporting film, and then roll the self-supporting film with the current collector to form an electrode. Currently, the binder is usually dropped from above into the nip of two pressure rollers arranged opposite to each other, and the electrode film is formed by extrusion through the rotation of the two pressure rollers, and then the film is thinned and corrected through multiple stages of calendering to become a finished film.

[0032] In the dry electrode process, the pre-fiberization of the adhesive is very critical. The commonly used fiberization methods include high-speed airflow method (such as jet mill, fluidized bed, etc.) or high-speed mechanical shearing method. These methods all input high mechanical energy to the dry mixed material in the form of impact, causing the adhesive to fiberize under stress. However, the high mechanical energy in this way can cause damage to the material particles, leading to problems such as interlayer peeling of graphite, crushing of ternary active materials, and falling of the carbon coating layer on the surface of lithium iron phosphate materials.

[0033] In addition, the material after pre-fiberization is agglomerates with viscosity, so that the consistency of the particle size of the particles after pre-fiberization is poor, which is not conducive to the consistency of the subsequent feeding film formation, and the excessive lumps will cause the material to bridge, which will seriously affect the subsequent film forming process.

[0034] Therefore, how to provide a new fiberization method without impacting the material during the pre-fiberization of the dry-mixed material, without causing damage to the material particles, and also improving the consistency of the particle size of the particles after pre-fiberization is an urgent problem to be solved.

[0035] Based on this, the present application provides a fiberization device.

[0036] Figure 1 A front view of the fiberization device of the embodiment of the present application is shown, Figure 2 A front view of the fiberization device of the embodiment of the present application is shown, Figure 3 A front view of the fiberization device of the embodiment of the present application is shown.

[0037] Referring to Figure 1 , Figure 2 and Figure 3 , the fiberization device comprises:

[0038] The fiberization mechanism 100 comprises two fiberization rollers 101 arranged oppositely, and a feeding gap 102 is formed between the two fiberization rollers 101, the feeding gap 102 comprising a feeding end 1021 and a discharging end 1022;

[0039] The feeding mechanism 200 is located above the feeding end 1021 and is used for feeding the material to the feeding end 1021;

[0040] The sieve cutting mechanism 300 is located below the discharging end 1022 and comprises a hopper 301, a crushing component 302 and a sieve 303, the crushing component 302 and the sieve 303 are both located in the hopper 301, the sieve 303 is located below the crushing component 302, the hopper 301 is used for receiving the material flowing out of the discharging end 1022, the crushing component 302 is used for crushing the material received by the hopper 301, and the sieve 303 is used for screening the material crushed by the crushing component 302.

[0041] Specifically, the feeding mechanism 200 is located above the fiberization mechanism 100, and the feeding mechanism 200 is used to feed the material to the feeding end 1021 of the feeding gap 102. After the material enters the feeding gap 102 from the feeding end 1021, the material flows along the feeding gap 102. When the material flows in the feeding gap 102, the fiberization rollers 101 oppositely arranged and having a certain inter-roller linear pressure between the two rollers apply a certain extrusion pressure to the material, and the two continuously rotating fiberization rollers 101 apply a certain shearing force to the material, so that the material is fiberized under the action of the two fiberization rollers 101.

[0042] The fiberized material flows out of the discharging end 1022 of the feeding gap 102 and falls into the hopper 301 of the cutting and screening mechanism 300. The material entering the hopper 301 is crushed by the crushing component 302 located in the hopper 301, and then falls into the screen 303 located below the crushing component 302. The material is screened through the screen 303, so that the material particles with a particle size smaller than the pore size of the screen 303 fall from the bottom of the hopper 301 and enter the next process, and the material particles with a particle size larger than the pore size of the screen 303 remain on the screen 303 and do not fall from the bottom of the hopper 301. In this way, the particle size of the material falling from the bottom of the hopper 301 can be controlled through the screen 303, and the particle size consistency of the pre-fiberized particles is improved.

[0043] In this application, the oppositely arranged fiberization rollers 101 apply a certain extrusion pressure and shearing force to the material flowing through the feeding gap 102, so that the material is fiberized without being subjected to strong impact. This can effectively fiberize the material and avoid the damage of the material particles caused by strong impact. At the same time, the pre-fiberized material flowing out of the discharging end 1022 is crushed by the crushing component 302 in the cutting and screening mechanism 300, which can avoid the material from caking, and the particle size of the material falling from the bottom of the hopper 301 can be controlled through the screen 303 in the cutting and screening mechanism 300, which improves the particle size consistency of the pre-fiberized particles.

[0044] The fiberization device of the present application provides a low-shear but high-efficiency fiberization method, and integrates the granulation function, which can greatly improve the fiberization efficiency of the dry-mixed material in the dry electrode process, and output pre-fiberized material with controllable particle size and uniform dispersion, to ensure the efficient production of dry electrodes.

[0045] Figure 4 The structural schematic diagram of the fiberization device of the embodiment of the present application is shown (the feeding mechanism 200 is not shown).

[0046] In some embodiments, referring to Figure 4The fiberization mechanism 100 further comprises two driving members 103, each of which is connected with one of the two fiberization rollers 101, and the driving member 103 is configured to drive the corresponding fiberization roller 101 to rotate.

[0047] Specifically, the driving member 103 can be a driving motor 304. The two driving members 103 are connected with the two fiberization rollers 101 respectively, i.e., the two fiberization rollers 101 are driven by their corresponding driving members 103 respectively. In this way, the rotating speeds of the two fiberization rollers 101 can be controlled respectively, so as to flexibly control the shearing force applied to the material by the two fiberization rollers 101 through the difference in the rotating speeds.

[0048] The ratio of the linear speeds of the two fiberization rollers 101 is controlled to be 1:1.4-1:6. In this way, the shearing force applied to the material by the two fiberization rollers 101 with the linear speed difference is moderate, which can not only ensure that the material can be effectively fiberized, but also avoid damage to the material particles caused by excessive shearing force.

[0049] Specifically, the ratio of the linear speeds of the two fiberization rollers 101 can be 1:1.4, 1:2, 1:3, 1:4, 1:5, 1:6, etc.

[0050] Specifically, the linear speed of each of the two fiberization rollers 101 can be 1-200 m / min.

[0051] Specifically, the pressure applied to each of the fiberization rollers 101 from the side away from the feed gap 102 can be 50 kg / cm-3 t / cm, so as to ensure that the two fiberization rollers 101 can apply a certain degree of extrusion force to the material, thereby ensuring the fiberization of the material.

[0052] Specifically, the outer surface of each of the two fiberization rollers 101 is provided with a plating layer (chromium plating layer, tungsten carbide spraying layer, etc.), so as to improve the hardness, so that the surface hardness of the fiberization roller 101 is ≥60 HRC (room temperature).

[0053] In some embodiments, continuing to refer to Figure 4 The cutting screen mechanism 300 further comprises a driving motor 304, the output shaft 3041 of the driving motor 304 extends into the bunker 301 through the side wall of the bunker 301, and the crushing component 302 is fixedly arranged on the outer wall of the output shaft 3041.

[0054] Specifically, the output shaft 3041 of the driving motor 304 extends into the bunker 301 through the side wall of the bunker 301, and the crushing component 302 is fixedly arranged on the outer wall of the output shaft 3041. In this way, the driving motor 304 can drive the crushing component 302 to rotate, and the rotating crushing component 302 can crush the material falling into the bunker 301, thereby avoiding the material from being caked and affecting the subsequent film forming process.

[0055] Further, the gap between the end of the crushing component 302 far away from the output shaft 3041 and the inner wall of the hopper 301 is 0.1mm-1mm, so that the gap between the end of the crushing component 302 far away from the output shaft 3041 and the inner wall of the hopper 301 is very small, which ensures that the material cannot pass through the gap between the crushing component 302 and the inner wall of the hopper 301, and avoids that the caked material passes through the gap to affect the crushing effect of the material.

[0056] In some embodiments, continuing to refer to Figure 4 , the crushing component 302 is provided in plurality, and the plurality of crushing components 302 are arranged at intervals along the extension direction of the output shaft 3041, so that the plurality of crushing components 302 can be uniformly distributed in the extension direction of the output shaft 3041 to cover the entire hopper 301 as much as possible, ensuring that almost all the material can be crushed by the crushing component 302, avoiding that the caked material falls without being crushed by the crushing component 302, and ensuring the crushing effect to prepare for the subsequent screening of the screen 303.

[0057] In some embodiments, the screen 303 is provided in plurality, and the plurality of screens 303 are arranged at intervals along the direction from the feeding mechanism 200 to the crushing and screening mechanism 300, and the pore size of the screen hole of the screen 303 gradually decreases

[0058] Specifically, the pore size of the screen 303 close to the feeding mechanism 200 is larger, and the pore size of the screen 303 far away from the feeding mechanism 200 is smaller, so that the material crushed by the crushing component 302 first passes through the screen 303 with larger pore size, and the screen 303 with larger pore size can perform the first screening on the material, leaving the material with very large pore size on the screen 303, and the material with not too large pore size falls from the screen 303 and falls into the next layer of screen 303. Since the pore size of the next layer of screen 303 is smaller, the next layer of screen 303 can perform the second screening on the material, leaving the material with larger particle size on the screen 303, and the material with smaller particle size falls from the screen 303 and falls into the next layer of screen 303……and so on, until the material falling from the last layer of screen 303 is the material finally falling from the bottom of the hopper 301.

[0059] The arrangement of the plurality of screens 303 can perform multiple fine screenings on the material to ensure the uniformity of the particle size of the material finally falling from the bottom of the hopper 301. Moreover, the arrangement of the plurality of screens 303 can reduce the screening pressure of each layer of screen 303, avoiding that too much material remains on a layer of screen 303 to affect the screening of the subsequent material.

[0060] Exemplarily, two screens 303 can be provided, the two screens 303 are respectively a first screen and a second screen, the first screen is arranged close to the feeding mechanism 200, and the second screen is arranged away from the feeding mechanism 200. Then, the pore size of the first screen is greater than the pore size of the second screen, and the two times of screening through the first screen and the second screen can ensure the uniformity of the particle size of the material finally falling from the bottom of the material bin 301.

[0061] In some embodiments, each fiberization roller 101 is internally provided with a heating assembly for heating the fiberization roller 101.

[0062] Specifically, the heating assembly can be a resistance wire or a heating interlayer, the resistance wire is used for electric heating of the fiberization roller 101, and the heating interlayer is used for passing a heating medium to heat the fiberization roller 101, and the heating medium can be hot water or hot oil.

[0063] The fiberization roller 101 is heated by the heating assembly, so that the material can be heated when contacting the fiberization roller 101, and the viscosity of the heated material is enhanced, which is beneficial to the fiberization of the material.

[0064] Exemplarily, the temperature of the heating medium can be room temperature-250°C.

[0065] In some embodiments, the material bin 301 is internally provided with a cooling interlayer for passing a cooling medium.

[0066] Specifically, the cooling medium can be cold water.

[0067] By passing the cooling medium into the cooling interlayer, the temperature of the material bin 301 can be reduced, so that the material entering the material bin 301 will be cooled by the material bin 301, the viscosity of the material after temperature reduction is reduced, and the flowability is increased, on the one hand, the flowability of the material can be improved, so that the material can smoothly pass through the crushing component 302 and the screen 303, on the other hand, the material can also avoid re-agglomeration in the subsequent film-forming process, so that the material can maintain uniform particle size for the subsequent film-forming process. Exemplarily, the temperature of the cooling medium can be-20°C-10°C.

[0068] In some embodiments, the size of the feeding gap 102 is 100um-5000um; and / or the outer diameter size of the fiberization roller 101 is 100-600mm; and / or the pore size of the screen hole of the screen 303 is less than or equal to 500 mesh.

[0069] Specifically, the size of the feeding gap 102 is 100 um to 5000 um, which makes the amount of feed in the feeding gap 102 moderate to ensure the effect of fiberization. If the size of the feeding gap 102 is too large, the amount of feed will be too large, resulting in poor fiberization effect; if the feeding gap 102 is too small, the amount of feed will be too small, resulting in too much extrusion force or shear force on the material, causing damage to the material particles. Exemplarily, the size of the feeding gap 102 can be 100 um, 500 um, 1000 um, 2000 um, 3000 um, 4000 um, 5000 um, etc.

[0070] The outer diameter size of the fiberization roller 101 is 100 to 600 mm, so that the outer diameter size of the fiberization roller 101 is appropriate to ensure the stability of the fiberization roller 101 when rotating, and the fiberization roller 101 can provide good shearing effect. Exemplarily, the outer diameter size of the fiberization roller 101 can be 100 mm, 200 mm, 300 mm, 400 mm, 500 mm, 600 mm, etc.

[0071] The mesh size of the screen 303 is less than or equal to 500 mesh, so that the particle size of the material falling from the screen 303 is uniform, and the subsequent film forming process is facilitated.

[0072] In summary, the fiberization device of the present application can optimize the effect of fiberization by controlling the temperature of the fiberization roller, the size of the feeding gap between the two fiberization rollers, and the difference in linear velocity of rotation of the two fiberization rollers.

[0073] Figure 5 The structure schematic diagram of the dry film forming device of the embodiment of the present application is shown.

[0074] Referring to Figure 5 , the present application also provides a dry film forming device, which comprises the fiberization device of any one of the above first aspect. The dry film forming device further comprises a feeding mechanism 1 and a film forming mechanism 2.

[0075] The feeding mechanism 1 is located below the screen cutting mechanism 300, and the feeding mechanism 1 comprises a feeding channel, which comprises a feeding port, a feeding gap and a discharge port arranged in sequence, and the feeding channel is configured to allow the material flowing out of the screen cutting mechanism 300 to enter from the feeding port and flow out from the discharge port along the feeding gap;

[0076] The film forming mechanism 2 is located below the discharge port and is configured to receive the material flowing out of the discharge port and calender the material into a finished film.

[0077] Specifically, the feeding mechanism 1 is located below the cutting and screening mechanism 300, the pre-fiberized material flowing out of the cutting and screening mechanism 300 enters the feeding mechanism 1 from the feeding port and flows out from the discharging port along the feeding gap. The material flowing out of the discharging port enters the film forming structure, and the film forming mechanism 2 calenders the material to finally form a finished film sheet.

[0078] The film forming mechanism 2 can include a plurality of film forming rollers arranged in sequence, and adjacent two film forming rollers have a film forming gap. The material flowing out of the discharging port enters the first film forming gap, and under the joint action of the adjacent two rotating film forming rollers, the material entering the first film forming gap is calendered into an initial film sheet. The initial film sheet is sequentially guided into the subsequent multiple film forming gaps by the rotating film forming rollers, and is calendered, corrected and spread by the subsequent multiple film forming rollers, and finally forms a finished film sheet. Then, the finished film sheet is bonded on the current collector, and the final electrode sheet can be formed.

[0079] In the dry film forming equipment of the present application, the fiberization equipment can provide pre-fiberized material with uniform particle size, so that the material particles entering the feeding mechanism 1 and the film forming mechanism 2 for film forming have good consistency, and the consistency of the finished film sheet and the electrode sheet finally prepared is improved.

[0080] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the acts or steps recited in the claims can be performed in an order different than that described above and still achieve desirable results. In addition, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous.

[0081] Those skilled in the art will understand that the above discussion of any of the embodiments is merely exemplary and is not intended to be limiting of the scope of the present application; the above embodiments or technical features among different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes of different aspects of the embodiments of the present application as described above. In order to be brief, they are not provided in detail.

[0082] The embodiments of the present application are intended to cover all such alternatives, modifications and variations as fall within the broad scope of the present application. Accordingly, any and all such modifications, variations or equivalents that fall within the spirit and scope of the embodiments of the present application are intended to be included herein.

Claims

1. A fiberizing apparatus characterized by, The application relates to a dry film forming device. The device comprises a fiberizing mechanism, a feeding mechanism, and a cutting and screening mechanism. The fiberizing mechanism comprises two fiberizing rollers arranged oppositely, and a feeding gap is formed between the two fiberizing rollers. The feeding gap comprises a feeding end and a discharging end.

2. The fiberizing apparatus of claim 1 wherein, The feeding mechanism is arranged above the feeding end and is used for feeding material to the feeding end.

3. The fiberizing apparatus of claim 1 wherein, The cutting and screening mechanism is arranged below the discharging end and comprises a hopper, a crushing component, and a screen.

4. The fiberizing apparatus of claim 3 wherein, The crushing component and the screen are arranged in the hopper.

5. The fiberizing apparatus of claim 1 wherein, The screen is arranged below the crushing component.

6. The fiberizing apparatus of claim 1 wherein, The hopper is used for receiving material flowing out of the discharging end.

7. The fiberizing apparatus of claim 1 wherein, The crushing component is used for crushing the material received by the hopper.

8. The fiberizing apparatus of claim 1 wherein, The screen is used for screening the material crushed by the crushing component. The fiberizing mechanism further comprises two driving members.

10. The dry film forming apparatus according to claim 9, wherein Each of the two driving members is connected with one of the two fiberizing rollers. The driving member is used for driving the corresponding fiberizing roller to rotate. The cutting and screening mechanism further comprises a driving motor. An output shaft of the driving motor extends into the hopper through a side wall of the hopper. The crushing component is fixed to the output shaft. A plurality of crushing components are arranged along the extension direction of the output shaft. A plurality of screens are arranged along the direction from the feeding mechanism to the cutting and screening mechanism. The screens are arranged at intervals and the mesh size of the screens gradually decreases. Each of the fiberizing rollers is internally provided with a heating assembly. The heating assembly is used for heating the fiberizing roller. The hopper is internally provided with a cooling interlayer. The cooling interlayer is used for introducing cooling medium. The outer diameter of the fiberizing roller is 100-600 mm. The mesh size of the screen is less than or equal to 500 mesh.

9. A dry film forming device comprising the fiberizing device according to any one of claims 1-8. The device further comprises a feeding mechanism and a film forming mechanism. The feeding mechanism is arranged below the cutting and screening mechanism. The feeding mechanism comprises a feeding channel. The feeding channel comprises a feeding port, a feeding gap, and a discharging port arranged in sequence. The feeding channel is configured to allow material flowing out of the cutting and screening mechanism to enter from the feeding port and flow out of the discharging port along the feeding gap. The film forming mechanism is arranged below the discharging port. The film forming mechanism is configured to receive the material flowing out of the discharging port and calender the material into a finished film.

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