Fiberizing powder discharging equipment and fiberizing powder discharging method

Abstract

The invention relates to the technical field of battery production, in particular to fibrosis powder discharging equipment and a fibrosis powder discharging method. The fibrosis powder discharging equipment comprises a press-fit structure and a twisting and cutting mechanism, the press-fit structure can press the fibrosis powder into a fiber material block, and the twisting and cutting mechanism can twist and cut the fiber material block into a fibrosis sheet with the preset thickness and the preset size. The fiberized sheets can be agglomerated together under the action of surface tension of the fiberized sheets and form fiberized particles, and the density of fibers in the fiberized powder is smaller than or equal to the density of fibers in the fiberized sheets and the density of fibers in the fiberized particles; and the stretching degree of the fibers in the fiberized powder is smaller than or equal to the stretching degree of the fibers in the fiberized sheets and the stretching degree of the fibers in the fiberized particles, so that the fiberized powder is rapidly discharged, and meanwhile, the processing quality of subsequent electrode diaphragms is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of battery production, and in particular to a feeding device for fiberized powder and a feeding method for fiberized powder. Background Art

[0002] Dry electrodes use solid powders to directly mix active materials, conductive agents, and adhesives together, and then apply the mixture to the current collector by pressing or other mechanical methods. The process steps of dry electrodes include dry material mixing, adhesive fibrillation and mixing, granulation, support film calendering, and current collector composite. In the adhesive fibrillation and mixing step, the adhesive needs to be mixed with the active material, conductive agent, and fixed electrolyte into a fiberized powder.

[0003] In the related art, the fiberized powder has a flocculent and sticky characteristic. The flocculent and sticky characteristic will lead to the problem of powder bridging during the feeding process of the fiberized powder, making it difficult to ensure the uniformity and flow consistency of the fiberized powder during feeding, which will easily lead to discontinuity of subsequent dry electrode film formation, affecting the product quality of the dry motor.

[0004] Therefore, it is urgent to invent a feeding device and a feeding method for fiberized powder to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a feeding device and a feeding method for fiberized powder, so as to prepare the fiberized powder into fiberized particles, and the density of the fiber filaments in the fiberized particles is greater than or equal to the density of the fiber filaments in the fiberized powder, and the stretching degree of the fiber filaments in the fiberized particles is greater than or equal to the stretching degree of the fiber filaments in the fiberized powder.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The feeding equipment for fiberized powder includes:

[0008] A pressing mechanism, wherein the pressing mechanism can press the fiberized powder into a fiberized material block;

[0009] The rubbing and cutting mechanism is arranged at the output end of the pressing mechanism. The rubbing and cutting mechanism can rub and cut the fiberized material block into a fiberized sheet of preset thickness and preset size. The fiberized sheet can agglomerate together and form fiberized particles under the action of its own surface tension.

[0010] As an optional solution, the pressing mechanism includes:

[0011] A compression cabin having a compression cavity;

[0012] A sealing piston, the pressing cavity is provided with an opening, a first feed port and a first discharge port, the sealing piston is movably arranged in the pressing cavity along the opening, the sealing piston and the cavity wall of the pressing cavity form a pressing space, the pressing space is communicated with the first feed port and the first discharge port, and the rubbing and cutting mechanism is arranged at the first discharge port; and

[0013] A driving structure, wherein an output end of the driving structure is connected to the sealing piston, and the driving structure can drive the sealing piston to move along a preset direction.

[0014] As an optional solution, the driving structure includes:

[0015] a first driving member, wherein an output end of the first driving member is connected to the sealing piston, and the first driving member can drive the sealing piston to rotate around the preset direction; and

[0016] A second driving member, wherein an output end of the second driving member is connected to the first driving member, and the second driving member can drive the first driving member to move along the preset direction.

[0017] As an optional solution, the driving structure further includes:

[0018] a connecting structure, the connecting structure being disposed between the first driving member and the second driving member; and

[0019] The guide rail extends along the preset direction, and the connecting structure is slidably connected to the guide rail.

[0020] As an optional solution, the rubbing and cutting mechanism includes:

[0021] A rubbing and cutting assembly is arranged at the output end of the pressing mechanism; and

[0022] A third driving member, wherein the output end of the third driving member is connected to the rubbing and cutting component, the rubbing and cutting component is directly opposite to the fibrous material block along a preset direction, the rubbing and cutting component has a rubbing and cutting hole that is conductive along the preset direction, the pressing mechanism can drive the fibrous material block to move along the preset direction close to the rubbing and cutting component, and the third driving member can drive the rubbing and cutting component to rotate around the preset direction.

[0023] As an optional solution, the rubbing and cutting component includes:

[0024] a support frame having a hollow region; and

[0025] A rigid net is fixed on the support frame and blocks the hollow area. The rigid net is directly opposite to the fiberized material block along the preset direction. The rigid net has a plurality of the rubbing and cutting holes.

[0026] As an optional solution, the feeding equipment of the fiberized powder further includes:

[0027] A screening mechanism, the screening mechanism comprising a screening cabin and a screen, the screening cabin having a screening cavity, the screening cavity having a second feed inlet and a screening outlet, the second feed inlet being directly opposite to the output end of the rubbing and cutting mechanism;

[0028] The screen is blocked in the screening cavity, the screen is located between the second feed port and the screening outlet, and the screen is configured to screen the fiberized particles according to diameter.

[0029] As an optional solution, the screening mechanism has a plurality of screens, which are blocked in the screening cavity at intervals along a preset direction, and a plurality of screening outlets are arranged on the screening cavity along the preset direction, with a screen arranged between each adjacent two screening outlets, and the mesh size of the plurality of screens gradually increases from one end close to the second feed port toward a direction away from the second feed port.

[0030] As an optional solution, the screening mechanism further comprises:

[0031] A vibration component, wherein an output end of the vibration component is connected to the screening cabin, and the vibration component is configured to drive the screening cabin to vibrate.

[0032] The method for feeding the fiberized powder comprises the following steps:

[0033] S1. Pressing the fiberized powder into a fiberized material block, wherein the density of the fiber filaments in the fiberized powder is greater than the density of the fiber filaments in the fiberized material block, and the stretching degree of the fiber filaments in the fiberized powder is greater than the stretching degree of the fiber filaments in the fiberized material block;

[0034] S2. Cutting and processing the fiberized material block into a fiberized sheet of preset thickness and preset size, so that the fiberized sheet can agglomerate together and form fiberized particles under the action of its own surface tension, the density of the fiber filaments in the fiberized sheet and the density of the fiber filaments in the fiberized particles are greater than or equal to the density of the fiber filaments in the fiberized powder, and the stretching degree of the fiber filaments in the fiberized sheet and the stretching degree of the fiber filaments in the fiberized particles are greater than or equal to the stretching degree of the fiber filaments in the fiberized powder.

[0035] Beneficial effects of the present invention:

[0036] The feeding equipment for fibrous powder provided by the present invention presses the fibrous powder into fibrous material blocks by arranging a pressing mechanism, and uses a rubbing and cutting mechanism to rub and cut the fibrous material blocks into fibrous sheets of preset thickness and preset size, so that the fibrous sheets formed by rubbing and cutting can agglomerate together and form fibrous particles under the action of their own surface tension, thereby achieving the effect of preparing fibrous powder into fibrous particles, solving the problem of powder bridging when directly conveying fibrous powder, and ensuring the uniformity and flow consistency of the conveying of fibrous particles. Moreover, before the fiberized powder is prepared into fiberized particles, the fiberized powder is first pressed into a fiberized block, which can make the density of the fiber filaments in the fiberized powder greater than the density of the fiber filaments in the fiberized block, and the degree of stretching of the fiber filaments in the fiberized powder greater than the degree of stretching of the fiber filaments in the fiberized block. The fiberized block is cut into fiberized sheets, so that the surface tension of the fiberized sheets themselves agglomerates the fiberized sheets into fiberized particles, which can make the density of the fiber filaments in the fiberized powder less than or equal to the density of the fiber filaments in the fiberized sheet and the density of the fiber filaments in the fiberized particles, and the degree of stretching of the fiber filaments in the fiberized powder is less than or equal to the degree of stretching of the fiber filaments in the fiberized sheet and the degree of stretching of the fiber filaments in the fiberized particles. By pressing and cutting the fiberized powder, the fiber filaments in the fiberized powder are repeatedly kneaded, the degree of stretching and density of the fiber filaments per unit area are increased, and then the fiberization effect of the fiber filaments is improved, thereby ensuring the processing quality of the subsequent electrode membrane.

[0037] The present invention also provides a method for feeding fibrous powder, which prepares the fibrous powder into fibrous particles, solves the problem of powder bridging when directly conveying the fibrous powder, and ensures the uniformity and flow consistency of the conveying of the fibrous particles. Moreover, before the fiberized powder is prepared into fiberized particles, the fiberized powder is first pressed into a fiberized material block, which can make the density of the fiber filaments in the fiberized powder greater than the density of the fiber filaments in the fiberized material block, and the stretching degree of the fiber filaments in the fiberized powder greater than the stretching degree of the fiber filaments in the fiberized material frame. The fiberized material block is cut into fiberized sheets, so that the surface tension of the fiberized sheets themselves agglomerates the fiberized sheets into fiberized particles, which can make the density of the fiber filaments in the fiberized powder less than or equal to the density of the fiber filaments in the fiberized sheets and the density of the fiber filaments in the fiberized particles, and the stretching degree of the fiber filaments in the fiberized powder is less than or equal to the stretching degree of the fiber filaments in the fiberized sheets and the stretching degree of the fiber filaments in the fiberized particles. By pressing and cutting the fiberized powder, the fiber filaments in the fiberized powder are repeatedly kneaded, the stretching degree and density of the fiber filaments per unit area are increased, and then the fiberization effect of the fiber filaments is improved, thereby ensuring the processing quality of the subsequent electrode membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a feeding device for fiberized powder provided in the first embodiment of the present invention;

[0039] Figure 2 It is the structure and schematic diagram of the rubbing and cutting assembly provided in the first embodiment of the present invention.

[0040] In the figure:

[0041] 1. Pressing mechanism; 11. First driving member; 12. Second driving member; 13. Connecting structure; 14. Guide rail; 15. Sealing piston; 16. Pressing chamber; 161. Pressing cavity; 162. First feed port; 163. First discharge port; 17. Protective cover;

[0042] 2. rubbing and cutting mechanism; 21. rubbing and cutting assembly; 211. support frame; 212. rigid net; 2121. rubbing and cutting hole; 22. third driving member;

[0043] 3. Screening mechanism; 31. Screening cabin; 311. Screening chamber; 312. Second discharge port; 313. Third discharge port; 314. Fourth discharge port; 32. Screen; 33. Feed valve; 34. Vibration assembly;

[0044] 1000. Fibrosis powder. DETAILED DESCRIPTION

[0045] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] Embodiment 1

[0050] The process steps of dry electrode include dry material mixing, adhesive fibrillation and mixing, granulation, support film calendering and current collector compounding. In the adhesive fibrillation and mixing step, the adhesive needs to be mixed with the active material, the conductive agent and the fixed electrolyte into a fiberized powder. In the related art, the fiberized powder has a flocculent and sticky characteristic. The flocculent and sticky characteristics will lead to powder bridging problems during the feeding process of the fiberized powder, making it difficult to ensure the uniformity and flow consistency of the fiberized powder during feeding, which will easily lead to discontinuity of the subsequent dry electrode film formation, affecting the product quality of the dry motor.

[0051] In order to solve the above problems, Figure 1 As shown, this embodiment provides a feeding device for fiberized powder. The feeding device for fiberized powder includes a pressing mechanism 1 and a rubbing and cutting mechanism 2, wherein the pressing mechanism 1 can press the fiberized powder 1000 into a fiberized material block, and the rubbing and cutting mechanism 2 is arranged at the output end of the pressing mechanism 1, and the rubbing and cutting mechanism 2 can rub and cut the fiberized material block into a fiberized sheet of preset thickness and preset size, and the fiberized sheet can be agglomerated together and form fiberized particles under the action of its own surface tension, and the density of the fiber filaments in the fiberized powder 1000 is less than or equal to the density of the fiber filaments in the fiberized sheet and the density of the fiber filaments in the fiberized particles, and the stretching degree of the fiber filaments in the fiberized powder 1000 is less than or equal to the stretching degree of the fiber filaments in the fiberized sheet and the stretching degree of the fiber filaments in the fiberized particles.

[0052] The feeding equipment for the fiberized powder presses the fiberized powder 1000 into a fiberized material block by setting a pressing mechanism 1, and uses a rubbing and cutting mechanism 2 to rub and cut the fiberized material block into a fiberized sheet of preset thickness and preset size, so that the rubbed and cut fiberized sheet can agglomerate together and form fiberized particles under the action of its own surface tension, thereby achieving the effect of preparing the fibrous powder 1000 into fibrous particles, solving the problem of powder bridging when directly conveying the fibrous powder 1000, and ensuring the uniformity and flow consistency of the conveying of the fibrous particles. Moreover, before the fibrous powder 1000 is prepared into fibrous particles, the fibrous powder 1000 is first pressed into a fibrous material block, which can make the density of the fiber filaments in the fibrous powder 1000 greater than the density of the fiber filaments in the fibrous material block, and the stretching degree of the fiber filaments in the fibrous powder 1000 is greater than the stretching degree of the fiber filaments in the fibrous material block, and the fibrous material block is cut into fibrous sheets, so that the surface tension of the fibrous sheets themselves agglomerates the fibrous sheets into fibrous particles, which can make the density of the fiber filaments in the fibrous powder 1000 greater than that of the fiber filaments in the fibrous material block. The degree of stretching of the fiber filaments in the fiberized sheet is less than or equal to the density of the fiber filaments in the fiberized particles, and the degree of stretching of the fiber filaments in the fiberized powder 1000 is less than or equal to the degree of stretching of the fiber filaments in the fiberized sheet and the degree of stretching of the fiber filaments in the fiberized particles. The fiberized powder 1000 is pressed and rubbed to achieve repeated kneading of the fiber filaments in the fiberized powder 1000, thereby increasing the degree of stretching and density of the fiber filaments per unit area, thereby increasing the degree of fiberization of the fiber filaments and ensuring the processing quality of subsequent electrode membranes.

[0053] It should be noted that the fiberized powder 1000 can be graphite fiberized powder, NCM fiberized powder or LFP fiberized powder. When the fiberized powder 1000 is graphite fiberized powder, the density of the graphite fiberized material block prepared by the pressing mechanism 1 is 0.9-1.25 g / cm 3 When the fiberized powder 1000 is NCM fiberized powder, the density of the NCM fiberized material block prepared by the pressing mechanism 1 is 2.0-3.1 g / cm 3 When the fiberized powder 1000 is LFP fiberized powder, the density of the LFP fiberized material block prepared by the pressing mechanism 1 is 1.2-2.2 g / cm 3 .

[0054] In this embodiment, the density of the graphite fiber block is 1.0 g / cm 3 The density of NCM fiberized block is 2.0g / cm 3 The density of LFP fiber block is 1.2g / cm 3 In other embodiments, the density of the graphite fiber block may be 0.9 g / cm 3 , 1.1g / cm 3, 1.15g / cm 3 , 1.2g / cm 3 , 1.25g / cm 3 or 0.9~1.25g / cm 3 The density of the NCM fiberized block can be 2.1 g / cm 3 , 2.2g / cm 3 , 2.3g / cm 3 , 2.4g / cm 3 , 2.5g / cm 3 , 2.6g / cm 3 , 2.7g / cm 3 , 2.8g / cm 3 , 2.9g / cm 3 、3.0g / cm 3 、3.1g / cm 3 or 2.0~3.1g / cm 3 The density of LFP fiberized material block can be 1.3g / cm 3 , 1.4g / cm 3 , 1.5g / cm 3 , 1.6g / cm 3 , 1.7g / cm 3 , 1.8g / cm 3 , 1.9g / cm 3 , 2.0g / cm 3 , 2.1g / cm 3 , 2.2g / cm 3 or 1.2~2.2g / cm 3 Any numerical value within the range is not specifically limited in this embodiment.

[0055] As an optional solution, the pressing mechanism 1 includes a pressing cabin 16, a sealing piston 15 and a driving structure, wherein the pressing cabin 16 has a pressing chamber 161, an opening, a first feed port 162 and a first discharge port 163 are provided on the pressing chamber 161, the sealing piston 15 is movably arranged in the pressing chamber 161 along the opening, the sealing piston 15 and the chamber wall of the pressing chamber 161 form a pressing space, the pressing space is connected to the first feed port 162 and the first discharge port 163, the rubbing and cutting mechanism 2 is arranged at the first discharge port 163, the output end of the driving structure is connected to the sealing piston 15, and the driving structure can drive the sealing piston 15 to move along a preset direction. A pressing chamber 161 is set in the pressing chamber 16, a first feed port 162, a first discharge port 163 and an opening are set on the pressing chamber 161, and a sealing piston 15 is movably set in the pressing chamber 161 along the opening, so that the sealing piston 15 and the cavity wall of the pressing chamber 161 form a pressing space, and the driving structure drives the sealing piston 15 to move in a preset direction, which can change the size of the pressing space, and then the fiberized powder 1000 entering the pressing space along the first feed port 162 is pressed into a fiberized material block, and the pressed and formed fiberized material block is discharged along the first discharge port 163.

[0056] It should be noted that the first feed port 162 and the first discharge port 163 are both provided with blocking valves, which respectively control the conduction and isolation of the first feed port 162 and the first discharge port 163, so that the fibrous powder 1000 is pressed into a fibrous material block in a sealed pressing space. It should be noted that in this embodiment, the blocking valves are all solenoid valves. The solenoid valve has a simple structure and is sensitive to reaction. The sealing effect is good. In other embodiments, the blocking valve may also be a ball valve, a butterfly valve or other valve body, which is not specifically limited in this embodiment.

[0057] When the fibrous powder 1000 needs to be prepared into a fibrous material block, the blocking valve at the first feed port 162 is first opened to allow the fibrous powder 1000 to enter the pressing chamber 161 along the first feed port 162, and then the blocking valve is re-blocked to the first feed port 162, and the driving structure drives the sealing piston 15 to move toward the direction close to the fibrous powder 1000 to press the fibrous powder 1000 in the pressing chamber 161 into a fibrous material block. When the pressed fibrous material block needs to be discharged from the pressing chamber 161, the blocking valve at the first discharge port 163 is opened, and the driving structure drives the sealing piston 15 to move toward the direction close to the first discharge port 163, and then the fibrous material block in the pressing chamber 161 is discharged along the first discharge port 163.

[0058] To facilitate determination of the compression of the fiberized powder 1000 in the compression space, the compression chamber 16 is made of a transparent material, and a scale extending along a preset direction is provided on the compression chamber 16. In other embodiments, the compression chamber 16 may be made of a transparent material only, which is not specifically limited in this embodiment.

[0059] Specifically, the driving structure includes a first driving member 11 and a second driving member 12, wherein the output end of the first driving member 11 is connected to the sealing piston 15, the first driving member 11 can drive the sealing piston 15 to rotate around a preset direction, and the output end of the second driving member 12 is connected to the first driving member 11, and the second driving member 12 can drive the first driving member 11 to move along a preset direction. By connecting the sealing piston 15 to the output end of the first driving member 11, connecting the first driving member 11 to the output end of the second driving member 12, the first driving member 11 drives the sealing piston 15 to rotate around a preset direction, and the second driving member 12 drives the first driving member 11 to move along a preset direction, it is possible to ensure the uniformity of extrusion of the fiberized powder 1000 along the preset direction, and improve the stretching effect of the fiberized sheets and fiberized particles formed by subsequent rubbing and cutting. It should be noted that in this embodiment, the first driving member 11 is a rotary motor, and the second driving member 12 is a linear motor. The rotary motor and the linear motor have simple structures, sensitive responses, and stable output power. In other embodiments, the first driving member 11 may be a combination of a rotary cylinder, a linear cylinder and a lead screw nut, or other rotary driving structures, and the second driving member 12 may be a combination of a linear cylinder, a rotary motor and a lead screw nut, or other linear driving structures.

[0060] In addition, in this embodiment, the first driving member 11 further includes a transmission structure composed of gears, chains and bearings to change the driving direction and driving accuracy of the first driving member 11 .

[0061] In order to improve the driving accuracy of the sealing piston 15 along the preset direction, the driving structure further includes a connecting structure 13 and a guide rail 14, wherein the connecting structure 13 is arranged between the first driving member 11 and the second driving member 12, the guide rail 14 extends along the preset direction, and the connecting structure 13 is slidably connected to the guide rail 14. When the second driving member 12 drives the first driving member 11 and the sealing piston 15 to move along the preset direction, the connecting structure 13 slides along the guide rail 14 to provide guidance for the movement of the sealing piston 15 in the pressing chamber 161.

[0062] In addition, in this embodiment, the pressing mechanism 1 also includes a protective cover 17, which is arranged on the outside of the first driving member 11, part of the second driving member 12, the guide rail 14 and the connecting structure 13. The sealing piston 15 can extend out of the protective cover 17 and enter the pressing chamber 161 to improve the protection of the sealing piston 15, the first driving member 11, part of the second driving member 12, the guide rail 14 and the connecting structure 13.

[0063] In an optional embodiment, the rubbing and cutting mechanism 2 includes a rubbing and cutting component 21 and a third driving component 22, wherein the rubbing and cutting component 21 is arranged at the first discharge port 163, the third driving component 22 is connected to the output end of the rubbing and cutting component 21, the rubbing and cutting component 21 is opposite to the fiberized material block along a preset direction, the rubbing and cutting component 21 has a rubbing and cutting hole 2121 that is conductive along the preset direction, and the third driving component 22 can drive the rubbing and cutting component 21 to rotate around a preset direction. When the pressed and formed fiberized material block needs to be rubbed and cut, the third driving member 22 drives the rubbing and cutting component 21 to rotate around a preset direction, and at the same time, the first driving member 11 drives the sealing piston 15 to rotate around a preset direction, and the second driving member 12 drives the sealing piston 15 to move along the preset direction toward the rubbing and cutting component 21, so that the rubbing and cutting holes 2121 in the rubbing and cutting component 21 can rub and cut the fiberized material block along the preset direction into a fiberized sheet of preset thickness and preset size, and the compacted fiberized material block can be stretched during the rubbing and cutting process, and the fiber filaments in the fiberized material block can be fully kneaded, so that the density of the fiber filaments in the fiberized sheet at the rubbing and cutting location is greater than or equal to the density of the fiber filaments in the fiberized powder 1000, and the stretching degree of the fiber filaments in the fiberized sheet is greater than or equal to the stretching degree of the fiber filaments in the fiberized powder 1000. It should be noted that in this embodiment, the third driving member 22 is a rotary motor. The rotary motor has a simple structure, sensitive response, and stable output power.

[0064] Specifically, if Figure 2 As shown, the rubbing and cutting assembly 21 includes a support frame 211 and a rigid net 212, wherein the support frame 211 has a hollow area, the rigid net 212 is fixed on the support frame 211 and blocks the hollow area, the rigid net 212 is directly opposite to the fiberized material block along a preset direction, and the rigid net 212 has a plurality of rubbing and cutting holes 2121. By setting the rubbing and cutting assembly 21 to the support frame 211 and the rigid net 212 fixed to the hollow area of ​​the support frame 211, the rigid net 212 is covered with rubbing and cutting holes 2121, and the rigid net 212 is directly opposite to the fiberized material block along a preset direction. When the rubbing and cutting process of the fiberized material block is performed, the rigid net 212 rotates around the preset direction, so that the rubbing and cutting holes 2121 on the rigid net 212 perform rubbing and cutting on the fiberized material block moving along the preset direction.

[0065] It should be noted that the rigid net 212 is made of carbon fiber wire or stainless wear-resistant steel wire to ensure that the rigid net 212 has a long service life while ensuring the structural strength of the rigid net 212. The diameter of the carbon fiber wire or the stainless wear-resistant steel wire is 0.05mm to 0.5mm. The mesh size of the rubbing hole 2121 is 1*1mm to 5*5mm. In this embodiment, the rigid net 212 is made of carbon fiber wire, the diameter of the carbon fiber wire is 0.1mm, and the mesh size of the rubbing hole 2121 in the rigid net 212 is 1*1mm. In other embodiments, the diameter of the carbon fiber wire or the stainless wear-resistant steel wire can also be 0.05mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm or any value within the range of 0.05-0.5mm, and the mesh size of the cutting hole 2121 can be 1*1mm, 3*3mm, 4*4mm, 5*5mm, 3*4mm, 2*4mm, 3*5mm, 4*5mm or any value within the range of 1*1mm-5*5mm, which is not specifically limited in this embodiment.

[0066] In this embodiment, if Figure 1 As shown, the unloading equipment for the fiberized powder also includes a screening mechanism 3, wherein the screening mechanism 3 includes a screening cabin 31 and a screen 32, the screening cabin 31 has a screening cavity 311, the screening cavity 311 is provided with a second feed port and a screening outlet, the second feed port is directly opposite to one end of the rubbing and cutting assembly 21 away from the pressing cabin 16 along a preset direction, the screen 32 is blocked in the screening cavity 311, the screen 32 is located between the second feed port and the screening outlet, and the screen 32 is configured to screen the fiberized particles according to diameter. By setting up a screening mechanism 3 consisting of a screening cabin 31 and a screen 32, a screening cavity 311 is provided in the screening cabin 31, and a second feed port and a screening outlet are provided on the screening cavity 311, and the second feed port is aligned with one end of the rubbing and cutting assembly 21 away from the pressing cabin 16 in a preset direction, so that the fiberized sheet at the rubbing and cutting process enters the screening cavity 311 along the second feed port, and the screen 32 is blocked between the second feed port and the screening outlet, so that the screen 32 can screen fiberized particles of different diameters, and fiberized particles with a diameter smaller than a preset diameter can be discharged from the screening cavity 311 along the screening outlet, so as to ensure the consistency of the size specifications of the discharged fiberized particles, and further ensure the consistency of the subsequent processing of the electrode membrane.

[0067] In addition, the screening mechanism 3 further includes a feed valve 33, which is arranged at the second feed port, and is used to control the conduction and isolation of the second feed port to control the fiberized particles to enter the screening chamber 311. It should be noted that in this embodiment, the feed valve 33 is a solenoid valve. The solenoid valve has a simple structure, sensitive response, and good sealing effect. In other embodiments, the feed valve 33 can also be a ball valve, a butterfly valve or other valve body, which is not specifically limited in this embodiment.

[0068] In order to further improve the processing consistency of the electrode membrane, the screening mechanism 3 has multiple screens 32, and the multiple screens 32 are sealed in the screening cavity 311 at intervals along a preset direction. The screening cavity 311 is provided with multiple screening outlets along a preset direction, and a screen 32 is provided between each adjacent screening outlet. The mesh size of the multiple screens 32 gradually increases from the end close to the second feed port toward the direction away from the second feed port.

[0069] It should be noted that, in this embodiment, Figure 1 As shown, the screening mechanism 3 has two screens 32 and three screening outlets. The three screening outlets are arranged in the order of the second outlet 312, the third outlet 313 and the fourth outlet 314 from the second feed inlet along the preset direction away from the second feed inlet; the two screens 32 are arranged in sequence along the preset direction. The mesh numbers of the two screens 32 are 8 and 12 in sequence from the second feed inlet to the second feed inlet along the preset direction. The screen 32 with a mesh number of 8 close to the second feed inlet is the first screen, and the screen 32 with a mesh number of 12 away from the second feed inlet is the second screen. The screening chamber 311 is provided with a second outlet 312 between the first screen and the second feed inlet, a third outlet 313 between the first screen and the second screen, and a fourth outlet 314 at one end of the second screen away from the first screen along the preset direction. The second discharge port 312 is used to discharge fiberized particles with a diameter greater than 8 mesh; the third discharge port 313 is used to discharge fiberized particles with a diameter between 8 mesh and 12 mesh; and the fourth discharge port 314 is used to discharge fiberized particles with a diameter less than 12 mesh.

[0070] It can be understood that in other embodiments, the specific number of screens 32 and the specific number of screening outlets can also be set according to actual needs. It only needs to ensure that the mesh number of the screen 32 gradually increases from the end close to the second feed port toward the direction away from the second feed port. This embodiment does not specifically limit the specific mesh number of the screen 32.

[0071] In order to further improve the screening efficiency of the fiberized particles, the screening mechanism 3 also includes a vibration component 34, the output end of the vibration component 34 is connected to the screening cabin 31, and the vibration component 34 is configured to drive the screening cabin 31 to vibrate. By setting the vibration component 34 to drive the screening cabin 31 to vibrate, the fiberized particles in the screening cabin 31 can be driven to move relative to the screen 32 to improve the screening efficiency of the fiberized particles. It should be noted that in this embodiment, the vibration component 34 is a linear cylinder, and the linear cylinder drives the screening cabin 31 to reciprocate to drive the screening cabin 31 to vibrate. In other embodiments, the vibration component 34 can also be a linear motor or other reciprocating drive structure, which is not specifically limited in this embodiment.

[0072] Embodiment 2

[0073] This embodiment provides a method for feeding fibrous powder, comprising the following steps:

[0074] S1. Pressing the fibrous powder 1000 into a fibrous material block, wherein the density of the fiber filaments in the fibrous powder 1000 is greater than the density of the fiber filaments in the fibrous material block, and the stretching degree of the fiber filaments in the fibrous powder 1000 is greater than the stretching degree of the fiber filaments in the fibrous material block;

[0075] S2. Cut and process the fiberized material blocks into fiberized sheets of preset thickness and preset size, so that the fiberized sheets can agglomerate together and form fiberized particles under the action of their own surface tension, the density of the fiber filaments in the fiberized sheets and the density of the fiber filaments in the fiberized particles are greater than or equal to the density of the fiber filaments in the fiberized powder 1000, and the stretching degree of the fiber filaments in the fiberized sheets and the stretching degree of the fiber filaments in the fiberized particles are greater than or equal to the stretching degree of the fiber filaments in the fiberized powder 1000.

[0076] The feeding method of the fibrous powder has the effect of preparing the fibrous powder 1000 into fibrous particles, solves the problem of powder bridging when directly conveying the fibrous powder 1000, and ensures the uniformity and flow consistency of the conveying of the fibrous particles. Moreover, before the fibrous powder 1000 is prepared into fibrous particles, the fibrous powder 1000 is first pressed into a fibrous material block, and the fibrous material block is cut into a fibrous sheet, so that the surface tension of the fibrous sheet itself agglomerates the fibrous sheet into fibrous particles, and the fibrous powder 1000 is pressed and cut to achieve repeated kneading of the fiber filaments in the fibrous powder 1000, thereby improving the stretching degree and density of the fiber filaments per unit area, so that the density of the fiber filaments in the fibrous sheet and the fibrous particles at the cutting processing is greater than or equal to the density of the fiber filaments in the fibrous powder 1000, and the stretching degree of the fiber filaments in the fibrous sheet and the fibrous particles is greater than or equal to the stretching degree of the fiber filaments in the fibrous powder 1000, thereby ensuring the processing quality of the subsequent electrode membrane.

[0077] It should be noted that the feeding method of fiberized powder provided in this embodiment can be applied to the feeding equipment of fiberized powder provided in Example 1, and can also be applied to other equipment with pressing and rubbing functions. This embodiment does not specifically limit the equipment to which the feeding method of fiberized powder is applied.

[0078] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A feeding device for fiberized powder, characterized in that: include: A pressing mechanism (1), wherein the pressing mechanism (1) is capable of pressing the fiberized powder (1000) into a fiberized material block; The rubbing and cutting mechanism (2) is arranged at the output end of the pressing mechanism (1), and the rubbing and cutting mechanism (2) can rub and cut the fiberized material block into a fiberized sheet of preset thickness and preset size. The fiberized sheet can be agglomerated together under the action of its own surface tension to form fiberized particles.

2. The feeding device for fibrous powder according to claim 1, characterized in that: The pressing mechanism (1) comprises: A compression chamber (16) having a compression chamber (161); a sealing piston (15), the pressing chamber (161) is provided with an opening, a first feed port (162) and a first discharge port (163), the sealing piston (15) is movably arranged in the pressing chamber (161) along the opening, the sealing piston (15) and the chamber wall of the pressing chamber (161) form a pressing space, the pressing space is in communication with the first feed port (162) and the first discharge port (163), and the rubbing and cutting mechanism (2) is arranged at the first discharge port (163); and A driving structure, wherein an output end of the driving structure is connected to the sealing piston (15), and the driving structure is capable of driving the sealing piston (15) to move along a preset direction.

3. The fiberized powder feeding device according to claim 2, characterized in that: The driving structure comprises: a first driving member (11), wherein an output end of the first driving member (11) is connected to the sealing piston (15), and the first driving member (11) is capable of driving the sealing piston (15) to rotate around the preset direction; and A second driving member (12), wherein an output end of the second driving member (12) is connected to the first driving member (11), and the second driving member (12) is capable of driving the first driving member (11) to move along the preset direction.

4. The feeding device for fibrous powder according to claim 3, characterized in that: The driving structure further includes: a connecting structure (13), wherein the connecting structure (13) is arranged between the first driving member (11) and the second driving member (12); and A guide rail (14), wherein the guide rail (14) extends along the preset direction, and the connection structure (13) is slidably connected to the guide rail (14).

5. The feeding device for fibrous powder according to any one of claims 1 to 4, characterized in that: The rubbing and cutting mechanism (2) comprises: A rubbing and cutting assembly (21) is arranged at the output end of the pressing mechanism (1); and A third driving member (22), wherein an output end of the third driving member (22) is connected to the rubbing and cutting assembly (21), the rubbing and cutting assembly (21) is directly opposite to the fibrous material block along a preset direction, the rubbing and cutting assembly (21) has a rubbing and cutting hole (2121) that is conductive along the preset direction, the pressing mechanism (1) can drive the fibrous material block to move close to the rubbing and cutting assembly (21) along the preset direction, and the third driving member (22) can drive the rubbing and cutting assembly (21) to rotate around the preset direction.

6. The feeding device for fibrous powder according to claim 5, characterized in that: The rubbing and cutting component (21) comprises: A support frame (211) having a hollow area; and A rigid net (212) is fixed on the support frame (211) and blocks the hollow area. The rigid net (212) is directly opposite to the fiberized material block along the preset direction. The rigid net (212) has a plurality of the rubbing holes (2121).

7. The feeding device for fibrous powder according to any one of claims 1 to 4, characterized in that: The unloading equipment of the fiberized powder also includes: A screening mechanism (3), the screening mechanism (3) comprising a screening chamber (31) and a screen (32), the screening chamber (31) having a screening cavity (311), the screening cavity (311) having a second feed inlet and a screening outlet, the second feed inlet being directly opposite to the output end of the rubbing and cutting mechanism (2); The screen (32) is blocked in the screening chamber (311), the screen (32) is located between the second feed port and the screening outlet, and the screen (32) is configured to screen the fiberized particles according to diameter.

8. The feeding device for fibrous powder according to claim 7, characterized in that: The screening mechanism (3) comprises a plurality of screens (32), wherein the plurality of screens (32) are sealed in the screening chamber (311) at intervals along a preset direction, and the screening chamber (311) is provided with a plurality of screening outlets along the preset direction, wherein a screen (32) is provided between each two adjacent screening outlets, and the mesh size of the plurality of screens (32) gradually increases from one end close to the second feed inlet toward a direction away from the second feed inlet.

9. The feeding device for fiberized powder according to claim 7, characterized in that: The screening mechanism (3) further comprises: A vibration component (34), wherein an output end of the vibration component (34) is connected to the screening chamber (31), and the vibration component (34) is configured to drive the screening chamber (31) to vibrate.

10. A method for feeding fibrous powder, characterized in that: The steps include: S1. Pressing a fibrous powder (1000) into a fibrous material block, wherein the density of the fiber filaments in the fibrous powder (1000) is greater than the density of the fiber filaments in the fibrous material block, and the stretching degree of the fiber filaments in the fibrous powder (1000) is greater than the stretching degree of the fiber filaments in the fibrous material block; S2. Cutting and processing the fiberized material block into a fiberized sheet of preset thickness and preset size, so that the fiberized sheet can agglomerate together and form fiberized particles under the action of its own surface tension, the density of the fiber filaments in the fiberized sheet and the density of the fiber filaments in the fiberized particles are greater than or equal to the density of the fiber filaments in the fiberized powder (1000), and the stretching degree of the fiber filaments in the fiberized sheet and the stretching degree of the fiber filaments in the fiberized particles are greater than or equal to the stretching degree of the fiber filaments in the fiberized powder (1000).

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