Fiber formation apparatus and dry film formation apparatus

Abstract

The present invention provides a fiberization apparatus and a dry film formation apparatus that avoid damage and aggregation of material particles and improve the uniformity of particle size after pre-fiberization. [Solution] The fiberization apparatus includes a fiberization mechanism 100, a feeding mechanism 200, and a cutting and sorting mechanism 300. The fiberization mechanism includes two fiberization rollers 101 arranged opposite each other, with a supply gap 102 formed between the two fiberization rollers, and the supply gap includes a supply end and a discharge end. The feeding mechanism is located above the supply end. The cutting and sorting mechanism is located below the discharge end and includes a hopper 301, a crushing member 302, and a screen 303, the screen being located below the crushing member. A constant pressing and shearing force is applied to the material fed into the supply gap via the opposing fiberization rollers, so that the material is fiberized without being subjected to strong impact, the material can be effectively fiberized, and damage to the material particles due to strong impact can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of dry electrode process technology, and particularly to a fibrillator and a dry film forming apparatus.

Background Art

[0002] In the dry electrode process, the preliminary fibrillation of the binder is extremely important. Currently, commonly used fibrillation methods include the high-speed airflow method (such as air jet mills and fluidized beds) and the high-speed mechanical shearing method. All of these methods apply high-energy mechanical energy to the dry mixed material by impact to fibrillate the binder under stress. However, the high mechanical energy in these methods may cause damage to the material particles, leading to problems such as interlayer delamination of graphite, breakage of ternary active materials, and peeling off of the carbon coating on the surface of the lithium iron phosphate material. In addition, since the material after preliminary fibrillation is an adhesive aggregate, the uniformity of the particle size of the particles after preliminary fibrillation is poor, which has an adverse effect on the uniformity of the subsequent material film formation. Furthermore, if the aggregates become excessively large, it may have a serious impact on the subsequent film-forming process.

[0003] Therefore, how to provide a new fibrillation method has become an urgent problem to be solved.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, an object of the present invention is to provide a fibrillator and a dry film forming apparatus.

Means for Solving the Problems

[0005] For the above object, the first aspect of the present invention is a fibrillation mechanism including two fibrillation rollers arranged opposite to each other, a supply gap being formed between the two fibrillation rollers, the supply gap including a supply end and a discharge end, and A feeding mechanism located above the supply end and used to feed material to the supply end, A cutting and sorting mechanism located below the discharge end, comprising a hopper, a crushing member, and a screen, wherein both the crushing member and the screen are located within the hopper, the screen is located below the crushing member, the hopper is used to receive material discharged from the discharge end, the crushing member is used to crush the material received by the hopper, and the screen is used to sort the material crushed by the crushing member, The invention provides a fiberization apparatus that includes [a specific component].

[0006] Optionally, the fiberization mechanism further includes two drive members, each of which is connected to two of the fiberization rollers, and the drive members are used to rotationally drive the corresponding fiberization rollers.

[0007] Optionally, the cutting and sorting mechanism further includes a drive motor, the output shaft of the drive motor extending through the side wall of the hopper into the hopper, and the crushing member being fixed to the output shaft.

[0008] Optionally, multiple crushing members are arranged, and these multiple crushing members are spaced apart along the extension direction of the output shaft.

[0009] Optionally, multiple screens may be arranged, and the multiple screens may be spaced apart along the direction from the feeding mechanism to the cutting and sorting mechanism, and the mesh pore size of the screens may gradually decrease.

[0010] Optionally, a heating element is placed inside each of the fiberizing rollers, and the heating element is used to heat the fiberizing rollers.

[0011] Optionally, a cooling jacket is placed inside the hopper and used to pass a cooling medium through the cooling jacket.

[0012] Optionally, the size of the supply gap is 100um to 5000um, and / or the outer diameter of the fiberizing roller is 100mm to 600mm, and / or the mesh pore size of the screen is 500 mesh or less.

[0013] A second aspect of the present invention provides a dry film forming apparatus that includes a fiber formation apparatus as described in any of the first aspects described above.

[0014] Optionally, further including a supply mechanism and a film formation mechanism, The supply mechanism is located below the cutting and sorting mechanism, and includes a supply channel, which includes sequentially arranged supply ports, supply gaps, and discharge ports, and the supply channel is configured such that material discharged from the cutting and sorting mechanism is supplied from the supply ports and discharged from the discharge ports along the supply gap. The film formation mechanism is located below the discharge port and is configured to receive the material discharged from the discharge port and calender the material into a finished film. [Effects of the Invention]

[0015] As can be seen from the above, the fiberization apparatus and dry film forming apparatus provided by the present invention include a fiberization mechanism comprising: a fiberization mechanism comprising two fiberization rollers arranged opposite each other, with a supply gap formed between the two fiberization rollers, the supply gap comprising a supply end and a discharge end; a feeding mechanism located above the supply end and used to feed material to the supply end; and a cutting and sorting mechanism located below the discharge end and comprising a hopper, a crushing member and a screen. A constant pressing and shearing force is applied to the material fed into the supply gap via the opposing fiberization rollers, so that the material is fiberized without being subjected to strong impact, thereby effectively fiberizing the material and avoiding damage to the material particles due to strong impact. At the same time, the pre-fiberized material discharged from the discharge end is crushed via the crushing member in the cutting and sorting mechanism, thus avoiding material aggregation, and the crushed material is sorted via the screen in the cutting and sorting mechanism, controlling the particle size of the material falling from the bottom of the hopper and improving the uniformity of the particle size of the pre-fiberized particles. [Brief explanation of the drawing]

[0016] To more clearly illustrate the technical solutions in the present invention or related technologies, the drawings used to describe the embodiments or related technologies are briefly introduced below. Clearly, the drawings described below are only embodiments of the present invention. Those skilled in the art can obtain other drawings based on these without any creative effort. [Figure 1] Figure 1 shows a front view of a fiber processing apparatus according to an embodiment of the present invention. [Figure 2] Figure 2 shows a front view of the fiberization apparatus according to an embodiment of the present invention during the fiberization process. [Figure 3] Figure 3 shows a schematic diagram of the principle when using a fiberization apparatus according to an embodiment of the present invention to perform fiberization. [Figure 4] Figure 4 shows a schematic diagram of the structure of a fiberization apparatus according to an embodiment of the present invention. [Figure 5] Figure 5 shows a schematic diagram of the structure of a dry film deposition apparatus according to an embodiment of the present invention.

Best Mode for Carrying Out the Invention

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the following provides a detailed description with reference to specific embodiments and the accompanying drawings.

[0018] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present invention should be noted to have the ordinary meaning understood by those skilled in the technical field related to the present invention. The terms "first," "second," and similar terms used in the embodiments of the present invention do not indicate order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the elements or objects preceding the term encompass the elements or objects following the term and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. Terms such as "above," "below," "left," "right," etc. are only used to indicate relative positional relationships. If the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Since the dry electrode process technology does not require electrode treatment using a solvent, the corresponding drying and solvent recovery processes and equipment are unnecessary, thereby significantly reducing the investment cost for lithium battery projects, the electrode manufacturing cost, and the carbon emission per unit. Since the dry electrode device was introduced, it has undergone several improvements, and its design is approaching the mass production level.

[0020] The mainstream method for manufacturing dry electrodes is the fibrillation of binders. In this method, powders of active materials and conductive agents are added to a solid binder to form a dry mixed material. Then, a high shear force is applied to fibrillate the binder, thereby binding the powders together. Subsequently, the binder is compressed and thinned by extrusion molding to form a self-supporting film, which is roll-pressed together with a current collector to form an electrode. Currently, the binder is usually dropped from above into the gap between two pressure rollers arranged opposite each other on the left and right. The two pressure rollers rotate relative to each other to extrude the electrode film. Thereafter, the film is further thinned and corrected by multi-stage calendering to obtain a finished film.

[0021] In the dry electrode process, pre-fibrillation of the binder is extremely important. Currently, commonly used fibrillation methods include the high-speed air flow method (such as air jet mills and fluidized beds) and the high-speed mechanical shearing method. All of these methods impart high-energy mechanical energy to the dry mixed material by impact, causing the binder to fibrillate under stress. However, the high mechanical energy in these methods may cause damage to the material particles, leading to problems such as interlayer peeling of graphite, damage to ternary active materials, and peeling of the carbon coating on the surface of lithium iron phosphate materials.

[0022] In addition, since the material after pre-fibrillation is a sticky aggregate, the particle size uniformity of the particles after pre-fibrillation is poor, which has an adverse effect on the uniformity of subsequent material film formation. Furthermore, if the aggregates become excessively large, it may have a serious impact on the subsequent film-forming process.

[0023] Therefore, it has become an urgent issue to provide a new fibrillation method that does not require impact on the material during pre-fibrillation of the dry mixed material, can improve the particle size uniformity of the particles after pre-fibrillation without damaging the material particles.

[0024] Based on this, the present invention provides a fibrillation device.

[0025] Figure 1 shows a front view of a fiberization apparatus according to an embodiment of the present invention, Figure 2 shows a front view of the fiberization apparatus according to an embodiment of the present invention when fiberizing a material, and Figure 3 shows a schematic diagram of the principle when fiberizing using the fiberization apparatus according to an embodiment of the present invention.

[0026] As shown in Figures 1, 2, and 3, the fiberization apparatus is A fiberization mechanism 100 includes two fiberization rollers 101 arranged opposite each other, with a supply gap 102 formed between the two fiberization rollers 101, the supply gap 102 including a supply end 1021 and a discharge end 1022; A feeding mechanism 200 is located above the supply end 1021 and is used to feed material to the supply end 1021, A cutting and sorting mechanism 300 located below the discharge end 1022, comprising a hopper 301, a crushing member 302, and a screen 303, wherein both the crushing member 302 and the screen 303 are located within the hopper 301, the screen 303 is located below the crushing member 302, the hopper 301 is used to receive material discharged from the discharge end 1022, the crushing member 302 is used to crush the material received by the hopper 301, and the screen 303 is used to sort the material crushed by the crushing member 302, Includes.

[0027] Specifically, the feeding mechanism 200 is located above the fiberization mechanism 100 and is used to feed material to the supply end 1021 of the supply gap 102. The material fed from the supply end 1021 into the supply gap 102 flows along the supply gap 102. As the material is fed into the supply gap 102 and flows, two fiberization rollers 101, positioned opposite each other and having a constant inter-roller linear pressure between them, apply a constant pressing force to the material. At the same time, the two continuously rotating fiberization rollers 101 apply a constant shear force to the material. As a result, the material is fiberized under the action of the two fiberization rollers 101.

[0028] After fiberization, the material is discharged from the discharge end 1022 of the supply gap 102 and falls into the hopper 301 of the cutting and sorting mechanism 300. The material flowing into the hopper 301 is crushed by a crushing member 302 located inside the hopper 301, and then falls onto a screen 303 located below the crushing member 302. The material is sorted by the screen 303, and material particles smaller than the pore diameter of the screen 303 fall from the bottom of the hopper 301 and are sent to the next process, while material particles with a particle size larger than the pore diameter 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 by the screen 303, and the uniformity of the particle size after pre-fiberization can be improved.

[0029] In this invention, a constant pressing and shearing force is applied to the material flowing through the supply gap 102 via the opposingly positioned fiberizing rollers 101, so that the material is fiberized without being subjected to strong impact, thereby effectively fiberizing the material and avoiding damage to the material particles due to strong impact. At the same time, the pre-fiberized material discharged from the discharge end 1022 is crushed via the crushing member 302 in the cutting and sorting mechanism 300, thus avoiding material aggregation, and the particle size of the material falling from the bottom of the hopper 301 is controlled via the screen 303 in the cutting and sorting mechanism 300, thereby improving the uniformity of the particle size of the pre-fiberized particles.

[0030] The fiberization apparatus of the present invention provides a highly efficient fiberization method with low shear, and at the same time, the apparatus integrates a granulation function, significantly improving the fiberization efficiency of dry mixtures in the dry electrode process, enabling control of particle size, and producing pre-fiberized material with uniform dispersibility, thereby ensuring the efficient production of dry electrodes.

[0031] Figure 4 shows a schematic diagram of the structure of a fiberization apparatus according to an embodiment of the present invention (the feeding mechanism 200 is not shown).

[0032] In some embodiments, referring to Figure 4, the fiberization mechanism 100 further includes two drive members 103, each of which is connected to two fiberization rollers 101, and the drive members 103 are used to rotate the corresponding fiberization rollers 101.

[0033] Specifically, the drive member 103 may be a drive motor 304. The two drive members 103 are each connected to the two fiberizing rollers 101, that is, the two fiberizing rollers 101 are each driven independently by the corresponding drive member 103. This allows the rotational speed of the two fiberizing rollers 101 to be controlled independently, and the shear force applied to the material can be flexibly controlled by the difference in rotational speeds.

[0034] The rotational linear velocity ratio of the two fiberization rollers 101 is controlled to 1:1.4 to 1:6. This ensures that the shear force applied to the material by the two fiberization rollers 101 with the above linear velocity difference is moderate, allowing the material to be effectively fiberized while preventing damage to the material particles due to excessive shear force.

[0035] For example, the ratio of the rotational linear velocities of the two fiberizing rollers 101 may be 1:1.4, 1:2, 1:3, 1:4, 1:5, 1:6, etc.

[0036] Here, the rotational linear speed of the two fiberizing rollers 101 may be between 1 m / min and 200 m / min.

[0037] Here, pressure is applied to each fiberizing roller 101 from one side away from the supply gap 102. The inter-roller linear pressure between the two fiberizing rollers 101 may be 50 kg / cm to 3 ton / cm, so that the two fiberizing rollers 101 can apply a constant pressing force to the material and ensure fiberization of the material.

[0038] Here, the outer surfaces of the two fiberized rollers 101 have a coating layer (chrome plating layer, tungsten carbide thermal spray layer, etc.) to improve hardness, and the surface hardness of the fiberized rollers 101 ≧The temperature is 60 HRC (room temperature).

[0039] In some embodiments, continuing with reference to Figure 4, the cutting and sorting mechanism 300 further includes a drive motor 304, the output shaft 3041 of the drive motor 304 extending into the hopper 301 through the side wall of the hopper 301 and the crushing member 302 being fixed to the outer wall of the output shaft 3041.

[0040] Specifically, the output shaft 3041 of the drive motor 304 penetrates the side wall of the hopper 301 and extends into the hopper 301, and the crushing member 302 is fixed to the outer wall of the output shaft 3041. This allows the drive motor 304 to rotate the crushing member 302. The rotating crushing member 302 crushes the material falling into the hopper 301, preventing material aggregation and thus preventing any impact on the subsequent film formation process.

[0041] Furthermore, the gap between the end of the crushing member 302 away from the output shaft 3041 and the inner wall of the hopper 301 is 0.1 mm to 1 mm. This makes the gap between the end of the crushing member 302 away from the output shaft 3041 and the inner wall of the hopper 301 very small, preventing material from passing through the gap between the crushing member 302 and the inner wall of the hopper 301, and preventing aggregated material from passing through the gap and affecting the crushing effect of the material.

[0042] In some embodiments, referring again to Figure 4, multiple crushing members 302 are arranged, spaced apart along the extending direction of the output shaft 3041. This ensures that the multiple crushing members 302 are evenly distributed along the extending direction of the output shaft 3041, covering the entire hopper 301 as much as possible. This ensures that almost all material is crushed by the crushing members 302, preventing aggregates from falling without being crushed, ensuring the crushing effect, and preparing the material for subsequent sorting by the screen 303.

[0043] In some embodiments, multiple screens 303 are arranged, spaced apart along the direction from the feeding mechanism 200 to the cutting and sorting mechanism 300, and the mesh pore size of the screens 303 gradually decreases.

[0044] Specifically, the pore size of the screen 303 closest to the feeding mechanism 200 is large, and the pore size of the screen 303 further away from the feeding mechanism 200 is small. Therefore, the material crushed by the crushing member 302 first passes through the screen 303 with the large pore size. The screen 303 with the large pore size performs the first sorting of the material. Material with very large pores is retained on the screen 303, while material with not-so-large pores falls from the screen 303 to the next screen 303. Since the next screen 303 has a small pore size, the next screen 303 performs the second sorting of the material. Material with large particle sizes is retained on the screen 303, while material with small particle sizes falls from the screen 303 to the next screen 303... This process continues until the material falling from the last screen 303 is the last material to fall from the bottom of the hopper 301.

[0045] By arranging the screens 303 in multiple layers, the material can be finely sorted multiple times, thereby ensuring uniformity in the particle size of the material that ultimately falls from the bottom of the hopper 301. Furthermore, by arranging the screens 303 in multiple layers, the sorting pressure on each layer of screen 303 can be reduced, preventing excess material from remaining on a particular screen 303 and affecting the sorting of subsequent materials.

[0046] Exemplary, two screens 303 may be arranged. The two screens 303 are a first screen and a second screen, respectively, with the first screen positioned close to the feeding mechanism 200 and the second screen positioned further away from the feeding mechanism 200. Thus, the pore size of the first screen is larger than that of the second screen. The two-stage sorting by the first and second screens ensures uniformity of the particle size of the material that ultimately falls from the bottom of the hopper 301.

[0047] In some embodiments, a heating element is placed inside each fiberizing roller 101, and the heating element is used to heat the fiberizing roller 101.

[0048] Specifically, the heating element may be a resistance wire or a heating jacket. The resistance wire is used to electrically heat the fiberizing roller 101. The heating jacket is used to introduce a heating medium for heating the fiberizing roller 101. The heating medium may be hot water or hot oil.

[0049] By heating the fiberization roller 101 with a heating element, the material can be heated when it comes into contact with the fiberization roller 101, increasing the viscosity of the heated material, which is advantageous for fiberization of the material.

[0050] For example, the temperature of the heating medium may be room temperature to 250°C.

[0051] In some embodiments, a cooling jacket is placed inside the hopper 301 and is used to pass a cooling medium through the cooling jacket.

[0052] Specifically, the cooling medium can be chilled water.

[0053] By introducing cooling into the cooling jacket, the temperature of the hopper 301 can be lowered, and the material is cooled by the hopper 301 after being fed into it. After the temperature is lowered, the viscosity of the material decreases and its fluidity increases. On the one hand, the fluidity of the material is improved, allowing the material to pass smoothly through the crushing member 302 and the screen 303. On the other hand, it is possible to prevent re-aggregation during material feeding in the subsequent film deposition process and ensure uniformity of particle size in the subsequent film deposition process. For example, the temperature of the cooling medium may be about 20°C to 10°C.

[0054] In some embodiments, the size of the supply gap 102 is 100um to 5000um, and / or the outer diameter size of the fiberizing roller 101 is 100mm to 600mm, and / or the mesh pore size of the screen 303 is 500 mesh or less.

[0055] Specifically, the size of the supply gap 102 is 100um to 5000um. This size ensures an appropriate amount of material is fed into the supply gap 102, thereby guaranteeing a fiberization effect. If the supply gap 102 is too large, the amount of material fed in will be too large, resulting in an insufficient fiberization effect. If the supply gap 102 is too small, the amount of material fed in will be too small, potentially applying excessive compressive or shearing force to the material and damaging the material particles. For example, the size of the supply gap 102 may be 100um, 500um, 1000um, 2000um, 3000um, 4000um, 5000um, etc.

[0056] The outer diameter size of the fiberized roller 101 is 100 mm to 600 mm. By having an appropriate outer diameter size for the fiberized roller 101, stability during rotation of the fiberized roller 101 is ensured, and the fiberized roller 101 can provide a desirable shearing action. For example, the outer diameter size of the fiberized roller 101 may be 100 mm, 200 mm, 300 mm, 400 mm, 500 mm, 600 mm, etc.

[0057] The mesh pore size of screen 303 is 500 mesh or less, resulting in uniform particle size of the material falling from screen 303, which is advantageous for the subsequent film deposition process.

[0058] In summary, the fiberization apparatus of the present invention can optimize the fiberization effect by controlling the temperature of the fiberization rollers, the size of the supply gap between the two fiberization rollers, and the difference in rotational linear speed between the two fiberization rollers.

[0059] Figure 5 shows a schematic diagram of the structure of a dry film deposition apparatus according to an embodiment of the present invention.

[0060] Referring to Figure 5, the present invention also provides a dry film deposition apparatus including a fiberization apparatus as described in any of the first embodiments above. The dry film deposition apparatus further includes a supply mechanism 1 and a film deposition mechanism 2.

[0061] The supply mechanism 1 is located below the cutting and sorting mechanism 300. The supply mechanism 1 includes a supply channel, which includes sequentially arranged supply ports, supply gaps, and discharge ports, and the supply channel is configured such that material discharged from the cutting and sorting mechanism 300 is supplied from the supply ports and discharged from the discharge ports along the supply gaps.

[0062] The film formation mechanism 2 is located below the discharge port and is configured to receive the material discharged from the discharge port and calender the material into a finished film.

[0063] Specifically, the supply mechanism 1 is located below the cutting and sorting mechanism 300. The pre-fiberized material discharged from the cutting and sorting mechanism 300 is fed into the supply port of the supply mechanism 1 and discharged from the discharge port along the supply gap. The material discharged from the discharge port is fed into the film formation structure, where the film formation mechanism 2 calenders the material to finally form a finished film.

[0064] The film deposition mechanism 2 may include a plurality of sequentially arranged deposition rollers. A deposition gap is provided between two adjacent deposition rollers, and the material discharged from the discharge port is fed into the first deposition gap. Through the cooperative action of the two rotating adjacent deposition rollers, the material fed into the first deposition gap is calendered to form an initial film. The initial film, driven by the rotating deposition rollers, is sequentially fed into a plurality of subsequent deposition gaps, where it is calendered, straightened, and stretched by the subsequent deposition rollers to finally form a finished film. The finished film is then bonded to a current collector to finally form an electrode sheet.

[0065] In the dry film formation apparatus of the present invention, the fiberization apparatus can provide pre-fiberized material having a uniform particle size, resulting in good uniformity of the material particles supplied to the supply mechanism 1 and the film formation mechanism 2 for film formation, and ultimately improving the uniformity of the completed film and electrode sheet formed.

[0066] It should be noted that the above description describes only some embodiments of the present invention. Other embodiments are also included in the appended claims. In some cases, the operations or steps described in the claims may be performed in an order different from that shown in the embodiments above to achieve the desired results. Furthermore, the processes shown in the drawings do not necessarily require a specific order or sequence to achieve the desired results. In some embodiments, multitasking and parallel processing may be possible or advantageous.

[0067] Those skilled in the art should understand the following: The description of any of the embodiments above is merely illustrative and does not mean that the scope of the invention is limited to these examples. In the concept of the invention, the technical features of the embodiments above or different embodiments can be combined, the steps can be carried out in any order, and many other variations of different aspects of the embodiments above exist but are not described in detail for the sake of brevity.

[0068] The embodiments of the present invention are intended to cover all substitutions, corrections, and modifications that fall within the broad scope of the invention. Accordingly, omissions, corrections, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the invention should be included within the scope of protection of the invention. [Industrial applicability]

[0069] The fiberization apparatus and dry film deposition apparatus of this application can be applied to the technical field of dry electrode processes. [Explanation of symbols]

[0070] 100: Fiber formation mechanism 101: Fiber Roller 102: Supply Gap 103: Drive Member 1021: Supply end 1022: Discharge end 200: Feeding mechanism 300: Cutting and sorting mechanism 301: Hoppa 302: Crushing member 303: Screen 304: Drive motor 3041: Output shaft 1: Feeding mechanism 2: Film formation mechanism

Claims

1. A fiberization mechanism comprising two fiberization rollers arranged opposite each other, with a supply gap formed between the two fiberization rollers, the supply gap including a supply end and a discharge end, A feeding mechanism located above the supply end and used to feed material to the supply end, A cutting and sorting mechanism located below the discharge end, comprising a hopper, a crushing member, and a screen, wherein both the crushing member and the screen are located within the hopper, the screen is located below the crushing member, the hopper is used to receive material discharged from the discharge end, the crushing member is used to crush the material received by the hopper, and the screen is used to sort the material crushed by the crushing member, A fiberization apparatus characterized by including

2. The fiberization mechanism further includes two drive members, each of which is connected to two of the fiberization rollers, and the drive members are used to rotate the corresponding fiberization rollers. The fiberization apparatus according to claim 1, characterized in that

3. The cutting and sorting mechanism further includes a drive motor, the output shaft of which penetrates the side wall of the hopper and extends into the hopper, and the crushing member is fixed to the output shaft. The fiberization apparatus according to claim 1, characterized in that

4. Multiple crushing members are arranged, and the multiple crushing members are spaced apart along the extension direction of the output shaft. The fiberization apparatus according to claim 3, characterized in that

5. Multiple screens are arranged, and along the direction from the feeding mechanism to the cutting and sorting mechanism, the multiple screens are spaced apart, and the mesh pore size of the screens gradually decreases. The fiberization apparatus according to claim 1, characterized in that

6. A heating element is placed inside each of the fiber-forming rollers, and the heating element is used to heat the fiber-forming roller. The fiberization apparatus according to claim 1, characterized in that

7. A cooling jacket is placed inside the hopper, and a cooling medium is used to pass through the cooling jacket. The fiberization apparatus according to claim 1, characterized in that

8. The outer diameter of the fiberizing roller is 100 mm to 600 mm, and / or the mesh pore size of the screen is 500 mesh or less. The fiberization apparatus according to claim 1, characterized in that

9. A dry film forming apparatus comprising a fiberization apparatus according to any one of claims 1 to 8.

10. The system further includes a supply mechanism and a film formation mechanism, The supply mechanism is located below the cutting and sorting mechanism, and includes a supply channel, which includes sequentially arranged supply ports, supply gaps, and discharge ports, and the supply channel is configured such that material discharged from the cutting and sorting mechanism is supplied from the supply ports and discharged from the discharge ports along the supply gap. The film formation mechanism is located below the discharge port and is configured to receive the material discharged from the discharge port and calender the material into a finished film. A dry film deposition apparatus according to claim 9, characterized in that

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