Grinding device for preparing sodium ion battery hard carbon negative electrode material

Abstract

The application discloses a kind of sodium ion battery hard carbon negative electrode material preparation grinding device, belong to hard carbon negative electrode material preparation field.A kind of sodium ion battery hard carbon negative electrode material preparation grinding device, including shell, store material box is arranged in the lower part of shell interior, store material box has first opening and the surrounding board compatible with first opening, crushing box is slidably installed in the upper part of shell interior, air inlet is opened in crushing box, and crushing assembly and drive assembly are installed in crushing box, fixedly connected with corrugated sleeve between surrounding board and crushing box, further comprising: sealing cylinder is fixedly installed on the inner wall of shell, and crushing box is slidably connected in sealing cylinder by piston mechanism;Gas path system and hollow shaft, gas tank and gas rod are fixedly installed on hollow shaft, sealing cylinder and piston mechanism cooperate with gas path system, ensure that the whole crushing and grinding process is carried out in inert gas atmosphere, prevent material oxidation, inert gas is introduced into hollow shaft by pump body by gas tank, and the material after secondary grinding is smoothly discharged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hard carbon negative electrode material preparation, and in particular to a grinding device for preparing hard carbon negative electrode material of a sodium ion battery. BACKGROUND

[0002] With the growing demand for sustainable energy solutions worldwide, developing efficient and economical energy storage systems has become a focus of research in the scientific and industrial communities. Lithium-ion batteries, as one of the most successful commercialized energy storage devices, have dominated the market in consumer electronics, electric vehicles, and grid-level energy storage applications. However, due to the scarcity and uneven geographical distribution of lithium resources, the cost of lithium-ion batteries has gradually increased. Moreover, there are risks in the supply chain. Therefore, it is particularly important to explore alternative energy storage technologies.

[0003] Sodium-ion batteries, as a potential alternative, have attracted widespread attention due to their abundant raw materials and low cost. Sodium and lithium are both alkali metals with similar physical and chemical properties, making sodium-ion batteries an effective alternative to lithium-ion batteries in certain application scenarios. Although the energy density of sodium-ion batteries is relatively low, they still have broad application prospects in large-scale energy storage and low-speed electric vehicles.

[0004] In sodium-ion batteries, the choice of negative electrode material is crucial. Hard carbon, as a commonly used negative electrode material, has advantages such as stable structure and good cycle performance. It is a special carbon material formed by high-temperature treatment of amorphous carbon, which contains abundant micropores and defect sites, facilitating the insertion and extraction of sodium ions, thereby improving the charging and discharging efficiency and cycle stability of the battery.

[0005] However, the preparation process of hard carbon negative electrode material is complex and requires multiple processes, including raw material pretreatment, crushing, ball milling, mixing, and molding. However, grinding in an air environment can easily lead to surface oxidation of the material, reducing the utilization rate of active substances. SUMMARY

[0006] The purpose of the present application is to solve the problem of surface oxidation of the material in the air environment during grinding, which reduces the utilization rate of active substances, and to propose a grinding device for preparing hard carbon negative electrode material of a sodium ion battery.

[0007] To achieve the above purpose, the application adopts the following technical solutions:

[0008] The utility model provides a kind of sodium ion battery hard carbon negative electrode material preparation grinding device, including shell, the shell inside below is provided with storage box, the storage box has first opening and the surrounding board compatible with first opening, the upper portion of the shell inside is slidably installed with crushing box, the crushing box is opened with air inlet, the crushing box is installed with the crushing component for grinding base material and the driving component of the reciprocating movement of driving crushing component, the surrounding board is fixedly connected between the crushing box, it further includes: sealing cylinder fixedly installed on the inner wall of the shell, the crushing box is slidably connected in the sealing cylinder by piston mechanism;Gas path system is arranged below the crushing box, and the output end is sealingly connected with the sealing cylinder, and the input end is externally connected with gas source by hose;Hollow shaft is coaxially arranged with the crushing component, and the hollow shaft is rotated by the driving of the crushing component;Air tank and air rod are fixedly installed on the hollow shaft, and the air tank, hollow shaft and air rod are communicated with each other.

[0009] In order to ensure the effective filling of the protective gas while maintaining the safety of the system, preferably, the gas path system includes a ring-shaped air chamber fixedly installed below the crushing box and coaxial with the hollow shaft, and an L-shaped air pipe fixedly connected between the ring-shaped air chamber and the sealing cylinder.

[0010] In order to prevent the fine material from adhering to the inner wall, further, the air tank includes a first tank body fixedly installed on the storage box, a pump body installed in the first tank body, a return pipe connected between the first tank body and the ring-shaped air chamber, and a second tank body fixedly installed on the hollow shaft, a sealing pipe fixedly connected between the second tank body and the first tank body, a sealing plate connected by an elastic member inside the second tank body, and the sealing plate connected with the crushing component.

[0011] In order to increase the contact opportunity with the material, improve the grinding efficiency and uniformity, further, the crushing component includes a hollow worm rotatably installed on the crushing box, one end of the hollow worm coaxially sleeved on the hollow shaft, the other end of the hollow worm externally connected with a motor, and a hollow sleeve coaxially sleeved on the hollow shaft, an L-shaped connecting rod fixedly installed on the outer edge surface of the hollow sleeve, symmetrically arranged blades fixedly installed on the end of the L-shaped connecting rod away from the hollow sleeve, a ball mill arranged below the L-shaped connecting rod, and a pull rope fixedly connected between the ball mill and the L-shaped connecting rod; wherein, the hollow sleeve abuts against the sealing plate.

[0012] In order to improve the processing efficiency and uniformity while intermittently blowing the gas, further, the driving component includes a worm gear engaged with the hollow worm, eccentric wheels coaxially installed on both sides of the worm gear, a U-shaped clamp arm rotatably installed on the hollow sleeve, and a transmission rod installed between the U-shaped clamp arm and the eccentric wheels.

[0013] In order to keep the inner wall of the crushing box clean, preferably, a scraper is slidingly installed on the inner wall of the crushing box, a support seat is fixedly installed on the inner wall of the baffle, and a support rod is fixedly connected between the scraper and the support seat.

[0014] In order to perform secondary grinding on the material, preferably, a cutter plate is fixedly installed on the hollow shaft, the edge of the cutter plate is serrated, the inner wall of the first opening has a gap matched with the edge of the cutter plate, a first wedge-shaped block is fixedly installed on the hollow shaft, and a second wedge-shaped block is installed at the bottom of the crushing box, and the inclined surfaces of the first wedge-shaped block and the second wedge-shaped block abut against each other.

[0015] In order to drive the conveying auger to rotate synchronously and realize continuous conveying of the material, further, a discharging base is installed in the material storage box through an elastic member, the cross section of the discharging base is funnel-shaped, the lowest end of the discharging base has a discharging port and a conveying auger installed in the discharging port, the output shaft of the conveying auger has equidistantly arranged square grooves, and the end of the hollow shaft close to the conveying auger has a protrusion matched with the square grooves.

[0016] In order to ensure that the quality and performance of the material are not affected by the external environment, still further, connecting ears are fixedly installed at the two ends of the discharging base, sliding grooves matched with the connecting ears are formed in the two sides of the material storage box, a connecting arm is rotatably installed on the outer wall of the crushing box through a bearing, and the end of the connecting arm away from the crushing box is hook-shaped, when the connecting arm contacts with the connecting ear, the connecting arm rotates along the bearing.

[0017] In order to automatically feed and reset, still further, a U-shaped push rod is slidingly installed on the shell, a feeding rod is installed on the U-shaped push rod, a feeding box is installed on the feeding rod, a second opening matched with the feeding box is formed in the crushing box, and a gas cylinder is fixedly installed on the shell, and the output end of the gas cylinder is fixedly connected with the U-shaped push rod; wherein the feeding rod comprises a first rod body fixedly connected with the U-shaped push rod and a second rod body rotatably connected with the first rod body, a guide groove is formed in the second rod body, and a sliding pin matched with the guide groove is fixedly installed on the inner wall of the second opening.

[0018] Compared with the prior art, the present application provides a grinding device for preparing sodium ion battery hard carbon negative electrode material, which has the following advantages:

[0019] 1. The sodium ion battery hard carbon negative electrode material preparation grinding device, the sealing cylinder and the piston mechanism cooperate with the gas path system to ensure that the entire crushing and grinding process is carried out in an inert gas atmosphere, preventing oxidation of the material, and the gas tank introduces inert gas into the hollow shaft through the pump body to assist the smooth discharge of the material after secondary grinding.

[0020] 2、The sodium ion battery hard carbon negative electrode material preparation grinding device, the scraper slides with the movement of the crushing box, effectively cleans the adhered material on the inner wall of the crushing box, keeps the inner wall clean, and promotes the smooth flow and uniform distribution of the material;

[0021] 3、The sodium ion battery hard carbon negative electrode material preparation grinding device, the air cylinder starts to push the U-shaped push rod, drives the feeding rod to move forward, and at the same time pushes the connecting arm to release the connecting ear, so that the discharging base is reset to prepare to receive the material, and the automatic feeding and discharging system is linked. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The whole structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0023] Figure 2 The internal structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0024] Figure 3 The internal structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0025] Figure 4 The crushing assembly and driving assembly linkage structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0026] Figure 5 The crushing box internal structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0027] Figure 6 The air tank structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0028] Figure 7 The feeding rod structure schematic diagram of the sodium ion battery hard carbon negative electrode material preparation grinding device is provided.

[0029] Figure 8 The sodium ion battery hard carbon negative electrode material preparation grinding device is provided. Figure 2 The enlarged schematic diagram of the structure A.

[0030] In the figure: 1, the machine shell; 101, the sealing cylinder; 102, the exhaust hole;

[0031] 2, the storage box; 201, the first opening; 202, the fence; 203, the chute; 204, the second spring;

[0032] 3, crushing box; 301, air inlet hole; 302, second opening; 303, sliding pin; 304, connecting block;

[0033] 4, crushing assembly; 401, hollow worm; 402, hollow sleeve; 403, L-shaped connecting rod; 404, blade; 405, ball mill; 406, pull rope; 407, motor;

[0034] 5, drive assembly; 501, worm gear; 502, eccentric wheel; 503, U-shaped clamp arm; 504, transmission rod;

[0035] 6, corrugated sleeve;

[0036] 7, piston mechanism; 701, piston plate; 702, piston rod

[0037] 8, air path system; 801, annular air chamber; 802, L-shaped air pipe;

[0038] 9, hollow shaft; 901, protrusion;

[0039] 10, air tank; 1001, first tank body; 1002, pump body; 1003, return pipe; 1004, second tank body; 1005, sealing plate; 1006, first spring; 1007, sealing pipe;

[0040] 11, air rod; 12, scraper; 13, support seat; 14, support rod; 15, cutter plate; 16, first wedge; 17, second wedge;

[0041] 18, blanking base; 1801, blanking port; 1802, conveying auger; 1803, square groove;

[0042] 19, connecting ear; 20, connecting arm; 21, U-shaped push rod;

[0043] 22, feeding rod; 2201, first rod body; 2202, second rod body; 2203, guide groove;

[0044] 23, feeding box; 24, air cylinder. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0046] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] Embodiments:

[0048] Referring to Figures 1-8 A kind of sodium ion battery hard carbon negative electrode material preparation grinding device, including shell 1, store material box 2 is arranged below inside shell 1, store material box 2 has first opening 201 and the baffle 202 that is compatible with first opening 201, breaking box 3 is slidably installed in the upper part of inside shell 1, the bottom of breaking box 3 has material hole that can pass through broken base material, breaking box 3 is equipped with the breaking assembly 4 for grinding base material and the drive assembly 5 for driving breaking assembly 4 to reciprocate on the inlet hole 301 being set up, baffle 202 is fixedly connected between breaking box 3, still include: sealing cylinder 101 is fixedly installed on the inner wall of shell 1, breaking box 3 is slidably connected in sealing cylinder 101 by piston mechanism 7, it needs to be explained that piston mechanism 7 includes piston plate 701 slidably installed in sealing cylinder 101, connecting block 304 is fixedly installed on the outer wall of breaking box 3, piston rod 702 is fixedly connected between connecting block 304 and piston plate 701, when external gas injects compressed inert gas into sealing cylinder 101, along with the increase of pressure in sealing cylinder 101, piston plate 701 is pushed upwards, and slides upwards along sealing cylinder 101, since piston plate 701 is connected with breaking box 3 by piston rod 702, therefore breaking box 3 will also rise along with it;Gas path system 8 is arranged below breaking box 3, and the output end is sealingly connected with sealing cylinder 101, and the input end is externally connected with gas source by hose;Hollow shaft 9 is coaxially arranged with breaking assembly 4, hollow shaft 9 is rotated by breaking assembly 4, and gas tank 10 and gas rod 11 are fixedly installed on hollow shaft 9, and gas tank 10, hollow shaft 9 and gas rod 11 are communicated with each other.

[0049] It needs to be explained that exhaust hole 102 that is communicated with inlet hole 301 is also set up on sealing cylinder 101, when breaking box 3 rises in sealing cylinder 101 under the action of gas pressurization, inlet hole 301 is exposed, and one-way valve is installed in inlet hole 301, allowing gas flow to enter breaking box 3 from the inside of sealing cylinder 101 but not backflow.

[0050] When the grinding device for preparing sodium-ion battery hard carbon negative electrode material is in a static state, the breaking box 3 is located at the bottom of the sealing cylinder 101, at this time, the gas inlet hole 301 is covered to prevent gas from entering, the gas path system 8 is started, and compressed inert gas such as nitrogen or argon is injected into the sealing cylinder 101, with the increase of pressure, the breaking box 3 is subjected to upward thrust and slides upward along the sealing cylinder 101, at this time, the corrugated sleeve 6 ensures the sealing and flexibility between the breaking box 3 and the storage box 2 during the movement of the breaking box 3, when the breaking box 3 rises to a certain height, the gas inlet hole 301 is exposed outside the sealing cylinder 101, the one-way valve is opened to allow the inert gas outside to flow into the breaking box 3, so as to reduce the opportunity of the material contacting with air and prevent surface oxidation, at the same time, the driving assembly 5 drives the breaking assembly 4 to reciprocate to preliminarily grind the input basic material, the ground material gradually falls into the storage box 2 below through the material hole for secondary grinding, the two-stage grinding mode helps to improve the grinding efficiency and uniformity, and after the preliminary grinding is completed, the inert gas in the sealing cylinder 101 is introduced into the hollow shaft 9 by the gas tank 10 to assist the smooth discharge of the material after the secondary grinding, reduce the residue and improve the production efficiency.

[0051] With reference to Figure 5 , in order to ensure the effective filling of the protective gas while maintaining the safety of the system, preferably, the gas path system 8 comprises an annular gas chamber 801 fixedly installed below the breaking box 3 and coaxial with the hollow shaft 9, and the L-shaped gas pipe 802 is fixedly connected between the annular gas chamber 801 and the sealing cylinder 101.

[0052] It should be noted that a pressure relief valve is installed at the top of the breaking box 3, which will automatically open to release excess pressure and avoid danger once the internal pressure exceeds the set safety threshold.

[0053] Through the above structure, when the gas path system 8 is started, the compressed inert gas provided by the external gas source is first introduced into the annular gas chamber 801, the L-shaped gas pipe 802 guides the gas flowing out of the annular gas chamber 801 into the sealing cylinder 101, so as to push the piston plate 701 to rise and drive the breaking box 3 to move stably, with the increase of the pressure in the sealing cylinder 101, if the set safety threshold is exceeded, the pressure relief valve at the top of the breaking box 3 will automatically open to release excess pressure and ensure the safety of operation.

[0054] With reference to Figure 5 and Figure 6In the secondary grinding process, the fine material is easy to adhere to the inner wall. Preferably, the gas tank 10 comprises a first tank 1001 fixedly installed on the storage tank 2, a pump body 1002 is installed in the first tank 1001, a return pipe 1003 is connected between the first tank 1001 and the annular gas chamber 801, and a second tank 1004 is fixedly installed on the hollow shaft 9. The second tank 1004 is fixedly connected with the first tank 1001 through a sealing pipe 1007, and the inside of the second tank 1004 is connected with a sealing plate 1005 through an elastic element. The elastic element is preferably a first spring 1006, which can automatically adjust the position when the crushing assembly 4 is working. The sealing plate 1005 is connected with the crushing assembly 4.

[0055] Through the above structure, when the device is running, the pump body 1002 starts to pump the gas in the sealing cylinder 101 to the first tank 1001 for storage. With the progress of the secondary crushing and grinding process, the crushing assembly 4 intermittently extrudes the sealing plate 1005 through the driving assembly 5, so that the inert gas enters the hollow shaft 9 from the path of the first tank 1001, the sealing pipe 1007 and the second tank 1004, and then is discharged from the gas rod 11. This can not only ensure the protective atmosphere required in the preparation process of sodium ion battery hard carbon negative electrode material, but also can discharge the fine material.

[0056] Referring to Figure 4 and Figure 5 Preferably, the crushing assembly 4 comprises a hollow worm 401 rotatably installed on the crushing tank 3, one end of the hollow worm 401 is coaxially sleeved on the hollow shaft 9, the other end of the hollow worm 401 is externally connected with a motor 407, and a hollow sleeve 402 is coaxially sleeved on the hollow shaft 9. An L-shaped connecting rod 403 is fixedly installed on the outer edge surface of the hollow sleeve 402, symmetrically arranged blades 404 are fixedly installed on the end of the L-shaped connecting rod 403 away from the hollow sleeve 402, a ball mill 405 is arranged below the L-shaped connecting rod 403, and a pull rope 406 is fixedly connected between the ball mill 405 and the L-shaped connecting rod 403. The hollow sleeve 402 abuts against the sealing plate 1005.

[0057] Through the above structure, when the motor 407 starts, it drives the hollow worm 401 to rotate, and then drives the hollow sleeve 402 and all the components thereon to rotate together. With the high-speed rotation of the L-shaped connecting rod 403 and the blades 404, the large material is quickly cut and crushed into smaller particles. The crushed material continues to be affected by the ball mill 405. Due to the existence of the pull rope 406, the ball mill 405 can freely swing within a certain range, increasing the opportunity to contact the material, thereby improving the grinding efficiency and uniformity.

[0058] Referring to Figure 4Preferably, the driving assembly 5 comprises a worm wheel 501 meshing with the hollow worm 401, and eccentric wheels 502 are coaxially installed on both sides of the worm wheel 501, and a U-shaped clamping arm 503 is rotatably installed on the hollow sleeve 402, and a transmission rod 504 is installed between the U-shaped clamping arm 503 and the eccentric wheels 502.

[0059] Through the above structure, when the motor 407 is started, the hollow worm 401 is driven to rotate, and the worm wheel 501 meshing with the hollow worm 401 is synchronously rotated, and with the rotation of the worm wheel 501, the eccentric wheels 502 also start to rotate. Due to the design characteristics of the eccentric wheels 502, they will have a periodic up-down displacement change during the rotation process. The rotation movement of the eccentric wheels 502 is transmitted to the U-shaped clamping arm 503 through the transmission rod 504. The U-shaped clamping arm 503 swings due to the pushing of the transmission rod 504. This swinging action makes the hollow sleeve 402 fixed thereon reciprocate, which helps to more efficiently crush and grind the materials and improve the processing efficiency and uniformity.

[0060] With reference to Figure 5 A scraper 12 is slidably installed in the crushing box 3, a support seat 13 is fixedly installed on the inner wall of the enclosing plate 202, and a support rod 14 is fixedly connected between the scraper 12 and the support seat 13.

[0061] Through the above structure, when the crushing assembly 4 works, the materials are quickly cut and ground into smaller particles. In this process, some materials may adhere to the inner wall of the crushing box 3, affecting the flowability and uniformity of the materials. With the loss of gas in the sealing cylinder 101, the crushing box 3 descends, the corrugated sleeve 6 shrinks, and the distance between the enclosing plate 202 and the crushing box 3 decreases. The scraper 12 slides with the movement of the crushing box 3, effectively cleaning the adhered materials, keeping the inner wall of the crushing box 3 clean, and promoting the smooth flow and uniform distribution of the materials.

[0062] When the crushing box 3 rises again by the gas, the scraper 12 resets.

[0063] With reference to Figure 3 and Figure 5 A knife plate 15 is fixedly installed on the hollow shaft 9, the edge of the knife plate 15 is sawtooth-shaped, and the inner wall of the first opening 201 has a gap matched with the edge of the knife plate 15; wherein the first wedge block 16 is fixedly installed on the hollow shaft 9, and the second wedge block 17 is installed at the bottom of the crushing box 3, and the inclined surfaces of the first wedge block 16 and the second wedge block 17 abut.

[0064] Through the arrangement of the above structure, when the motor 407 drives the hollow worm 401 to rotate, the hollow shaft 9 also rotates, the cutter plate 15 fixed on the hollow shaft 9 rotates, and the sawtooth-shaped edge of the cutter plate 15 can effectively cut and crush the material entering the storage box 2, forming secondary grinding. With the rotation of the hollow shaft 9 and the descent of the crushing box 3, the first wedge 16 and the second wedge 17 are in contact with the inclined surface and interact with each other, producing a "push-pull" effect, causing the crushing box 3 to vibrate or displace slightly, further promoting the smooth falling of the crushed material from the crushing box 3 into the storage box 2, reducing residues.

[0065] With reference to Figure 3 And Figure 6 The storage box 2 is provided with a discharging base 18 through an elastic member, preferably a second spring 204. The discharging base 18 has a funnel-shaped cross section, and the lowest end of the discharging base 18 has a discharging port 1801 and a conveying auger 1802 installed in the discharging port 1801. The output shaft of the conveying auger 1802 has equidistantly arranged square grooves 1803, and the end of the hollow shaft 9 close to the conveying auger 1802 has a protrusion 901 matched with the square grooves 1803.

[0066] Through the arrangement of the above structure, the material after secondary crushing and grinding falls into the discharging base 18 in the storage box 2. The funnel-shaped design of the discharging base 18 allows the material to naturally concentrate at the discharging port 1801 at the lowest point. When the motor 407 drives the hollow shaft 9 to rotate, the protrusion 901 on the hollow shaft 9 engages with the square grooves 1803 on the conveying auger 1802, thereby driving the conveying auger 1802 to rotate synchronously, realizing continuous conveying of the material. Inert gas enters the hollow shaft 9 from the path of the first box body 1001, the sealing pipe 1007, and the second box body 1004, and then is discharged from the air rod 11, preventing the material from adhering to the inner wall.

[0067] Further, the discharging base 18 is fixedly installed with connecting ears 19 at both ends, and the storage box 2 is provided with sliding grooves 203 on both sides matched with the connecting ears 19. The outer wall of the crushing box 3 is rotatably installed with a connecting arm 20 through a bearing, and the end of the connecting arm 20 away from the crushing box 3 is hook-shaped. When the connecting arm 20 contacts the connecting ear 19, the connecting arm 20 rotates along the bearing.

[0068] Through the arrangement of the above structure, when the crushing box 3 descends, the connecting arm 20 is connected with the connecting lug 19, and the hook part hooks the connecting lug 19. After the gas path system 8 injects the compressed inert gas into the sealing cylinder 101, as the pressure increases, the crushing box 3 is subjected to an upward thrust and slides upward along the sealing cylinder 101, and the discharging base 18 follows the upward movement of the crushing box 3 until the output shaft of the conveying auger 1802 contacts the hollow shaft 9. In this way, after secondary crushing, the material is not directly discharged from the conveying auger 1802, but is continuously protected in the inert gas, preventing the material from being oxidized and ensuring that the quality and performance of the material are not affected by the external environment.

[0069] With reference to Figure 2 and Figure 7 , the U-shaped push rod 21 is slidably installed on the shell 1, the feeding rod 22 is installed on the U-shaped push rod 21, the feeding box 23 is installed on the feeding rod 22, the second opening 302 is formed in the crushing box 3 and matched with the feeding box 23, the air cylinder 24 is fixedly installed on the shell 1, and the output end of the air cylinder 24 is fixedly connected with the U-shaped push rod 21; wherein the feeding rod 22 comprises a first rod body 2201 fixedly connected with the U-shaped push rod 21 and a second rod body 2202 rotationally connected with the first rod body 2201, the guide groove 2203 is formed in the second rod body 2202, and the slide pin 303 matched with the guide groove 2203 is fixedly installed on the inner wall of the second opening 302.

[0070] Through the arrangement of the above structure, the feeding box 23 is pre-filled with the material to be processed and placed at the end of the feeding rod 22. The U-shaped push rod 21 is initially located away from the crushing box 3 and waits for a start instruction. When the system receives a feeding instruction, the air cylinder 24 is started, and the output end of the air cylinder 24 pushes the U-shaped push rod 21 to move towards the crushing box 3. With the movement of the U-shaped push rod 21, the feeding rod 22 and the feeding box 23 at the end of the feeding rod 22 also advance. In the advancing process, the guide groove 2203 on the second rod body 2202 slides along the slide pin 303, ensuring that the feeding rod 22 can accurately align with the second opening 302 on the crushing box 3. When the feeding box 23 extends into the second opening 302, the cooperation between the guide groove 2203 and the slide pin 303 causes the second rod body 2202 to rotate, and the material is poured into the crushing box 3 to start the subsequent crushing and grinding process. At the same time, the U-shaped push rod 21 pushes the connecting arm 20 to release the connecting lug 19 in the advancing process, and the discharging base 18 is reset under the action of the second spring 204.

[0071] Working principle:

[0072] 1. Initial state

[0073] The crushing box 3 is located at the bottom of the sealing cylinder 101, and the air inlet hole 301 is covered to prevent gas from entering.

[0074] The material base 18 in the storage box 2 is kept in the initial position by the second spring 204, and the feeding box 23 is pre-filled with the material to be processed and placed at the end of the feeding rod 22;

[0075] 2. Gas management and protective atmosphere

[0076] The gas path system 8 is started, and the compressed inert gas provided by the external gas source is first introduced into the annular gas chamber 801, and then guided into the sealed cylinder 101 through the L-shaped gas pipe 802, pushing the piston plate 701 to rise and driving the crushing box 3 to move smoothly;

[0077] As the pressure in the sealed cylinder 101 increases, the air inlet hole 301 is exposed, the one-way valve is opened, allowing external inert gas to flow into the crushing box 3, reducing the opportunity for the material to come into contact with air and preventing surface oxidation;

[0078] 3. Automatic feeding process

[0079] The gas cylinder 24 is started, and its output end drives the U-shaped push rod 21 to move towards the crushing box 3;

[0080] The feeding rod 22 and the feeding box 23 at the end are pushed forward, and the guide groove 2203 slides along the slide pin 303, ensuring that the feeding rod 22 can accurately align with the second opening 302 on the crushing box 3;

[0081] When the feeding box 23 extends into the second opening 302, the material is poured into the crushing box 3, starting the subsequent crushing and grinding process;

[0082] 4. Crushing and grinding

[0083] The motor 407 is started to drive the hollow worm 401 to rotate, which in turn drives the hollow sleeve 402 and all the components on it, such as the L-shaped connecting rod 403, the blade 404, and the ball mill 405, to rotate together;

[0084] The blade 404 rotates at high speed, quickly cutting and crushing large pieces of material, and then the material is further refined by the action of the ball mill 405;

[0085] The drive assembly 5 includes a worm gear 501, an eccentric wheel 502, a U-shaped clamp arm 503, and a transmission rod 504 to drive the crushing assembly 4 to move back and forth, improving the crushing and grinding efficiency;

[0086] 5. Discharging and secondary grinding

[0087] The crushed material falls into the discharging base 18 in the storage box 2 through the material hole, and the funnel-shaped design allows the material to naturally concentrate at the discharging port 1801 at the lowest point;

[0088] The conveying auger 1802 is driven to rotate by the protrusion 901 on the hollow shaft 9, realizing continuous conveying of the material;

[0089] The first wedge 16 interacts with the second wedge 17, causing small amplitude vibration or displacement of the crushing box 3, facilitating the smooth falling of the material into the storage box 2;

[0090] 6. Material cleaning and equipment resetting

[0091] When the crushing box 3 is lowered, the hook-shaped end of the connecting arm 20 hooks the connecting lug 19, and as the crushing box 3 rises, the connecting arm 20 rotates along the bearing, driving the discharging base 18 to follow the rising;

[0092] The scraper 12 slides with the movement of the crushing box 3, cleaning the adhered material on the inner wall of the crushing box 3, keeping the inner wall clean and facilitating the smooth flow of the material;

[0093] The inert gas enters the hollow shaft 9 from the path of the first box 1001, the sealing tube 1007, and the second box 1004, and then is discharged from the air rod 11, preventing the fine material from adhering to the inner wall of the discharging base 18;

[0094] The U-shaped push rod 21 pushes the connecting arm 20 to release the connecting lug 19 during the advancing process, and the discharging base 18 is reset under the driving of the second spring 204.

[0095] 7. Safety measures

[0096] The pressure relief valve is installed on the top of the crushing box 3, and once the internal pressure exceeds the set safety threshold, the pressure relief valve is automatically opened to release the excess pressure, ensuring the safety of operation.

[0097] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A grinding device for preparing hard carbon negative electrode materials for sodium ion batteries, comprising a housing (1), characterized in that: A material storage box (2) is provided at the lower part of the casing (1), and the material storage box (2) has a first opening (201) and a panel (202) adapted to the first opening (201); a crushing box (3) is slidably installed at the upper part of the casing (1), and an air inlet (301) is provided on the crushing box (3); a crushing assembly (4) for grinding base materials and a driving assembly (5) for driving the crushing assembly (4) to move back and forth are installed in the crushing box (3); a corrugated sleeve (6) is fixedly connected between the panel (202) and the crushing box (3); and further comprises: a sealing cylinder (101) fixedly installed on the inner wall of the casing (1), and the crushing box (3) is slidably connected to the sealing cylinder (101) through a piston mechanism (7); and an air circuit system (8) is provided below the crushing box (3), the output end of which is sealedly connected to the sealing cylinder (101), and the input end is connected to an air source through a hose; a hollow shaft (9) coaxially arranged with the crushing assembly (4), the hollow shaft (9) being driven by the crushing assembly (4) to rotate, an air box (10) and an air rod (11) being fixedly mounted on the hollow shaft (9), and the air box (10), the hollow shaft (9) and the air rod (11) being in communication with each other; The air circuit system (8) comprises an annular air chamber (801) fixedly mounted below the crushing box (3) and coaxial with the hollow shaft (9), and an L-shaped air pipe (802) is fixedly connected between the annular air chamber (801) and the sealing cylinder (101); The air box (10) comprises a first box body (1001) fixedly mounted on the material storage box (2), a pump body (1002) being mounted in the first box body (1001), a return pipe (1003) being connected between the first box body (1001) and the annular air chamber (801), and a second box body (1004) fixedly mounted on the hollow shaft (9), a sealing pipe (1007) being fixedly connected between the second box body (1004) and the first box body (1001), a sealing plate (1005) being connected inside the second box body (1004) via an elastic member, and the sealing The plate (1005) is connected to the crushing component (4). When the device is running, the pump body (1002) is started to pump the gas in the sealing cylinder (101) into the first box (1001) for storage. The crushing component (4) intermittently squeezes the sealing plate (1005) through the driving component (5), so that the inert gas enters the hollow shaft (9) through the path of the first box (1001), the sealing tube (1007), and the second box (1004), and is then discharged from the gas rod (11). This can not only ensure the protective atmosphere required in the preparation process of the hard carbon negative electrode material of the sodium ion battery, but also discharge the finer materials.

2. The grinding device for preparing a hard carbon negative electrode material for a sodium ion battery according to claim 1, characterized in that: The crushing assembly (4) includes a hollow worm (401) rotatably mounted on the crushing box (3), one end of the hollow worm (401) being coaxially sleeved on the hollow shaft (9), and the other end of the hollow worm (401) being externally connected to a motor (407). and a hollow sleeve (402), which is coaxially sleeved on the hollow shaft (9); an L-shaped connecting rod (403) is fixedly mounted on the outer edge of the hollow sleeve (402); a symmetrically arranged blade (404) is fixedly mounted on one end of the L-shaped connecting rod (403) away from the hollow sleeve (402); a ball mill (405) is arranged below the L-shaped connecting rod (403); and a pull rope (406) is fixedly connected between the ball mill (405) and the L-shaped connecting rod (403); Wherein, the hollow sleeve (402) abuts against the sealing plate (1005).

3. The grinding device for preparing a hard carbon negative electrode material for a sodium ion battery according to claim 2, characterized in that: The driving assembly (5) comprises a worm wheel (501) meshingly connected with the hollow worm (401), eccentric wheels (502) are coaxially mounted on both sides of the worm wheel (501), a U-shaped clamp arm (503) is rotatably mounted on the hollow sleeve (402), and a transmission rod (504) is mounted between the U-shaped clamp arm (503) and the eccentric wheel (502).

4. The grinding device for preparing a hard carbon negative electrode material for a sodium ion battery according to claim 1, characterized in that: A scraper (12) is slidably mounted in the crushing box (3), a support seat (13) is fixedly mounted on the inner wall of the enclosure (202), and a support rod (14) is fixedly connected between the scraper (12) and the support seat (13).

5. The grinding device for preparing a hard carbon negative electrode material for a sodium ion battery according to claim 1, characterized in that: A knife plate (15) is fixedly mounted on the hollow shaft (9), the edge of the knife plate (15) is serrated, and the inner wall of the first opening (201) has a notch adapted to the edge of the knife plate (15); A first wedge block (16) is fixedly mounted on the hollow shaft (9), and a second wedge block (17) is mounted on the bottom of the crushing box (3), wherein the inclined surfaces of the first wedge block (16) and the second wedge block (17) are in contact with each other.

6. The grinding device for preparing a hard carbon negative electrode material for a sodium ion battery according to claim 1, characterized in that: A discharge base (18) is installed in the storage box (2) through an elastic member. The cross-section of the discharge base (18) is funnel-shaped. The lowest end of the discharge base (18) has a discharge port (1801) and a conveying auger (1802) installed in the discharge port (1801). The output shaft of the conveying auger (1802) has square grooves (1803) arranged at equal intervals. The end of the hollow shaft (9) close to the conveying auger (1802) has a protrusion (901) adapted to the square groove (1803).

7. A grinding device for preparing a hard carbon negative electrode material for a sodium ion battery according to claim 6, characterized in that: Connecting ears (19) are fixedly installed at both ends of the unloading base (18), and sliding grooves (203) adapted to the connecting ears (19) are opened on both sides of the storage box (2). A connecting arm (20) is rotatably installed on the outer wall of the crushing box (3) through a bearing, and the end of the connecting arm (20) away from the crushing box (3) is hook-shaped. When the connecting arm (20) contacts the connecting ear (19), the connecting arm (20) rotates along the bearing.

8. The grinding device for preparing hard carbon negative electrode materials for sodium ion batteries according to claim 7, characterized in that: A U-shaped push rod (21) is slidably mounted on the housing (1), a loading rod (22) is mounted on the U-shaped push rod (21), a loading box (23) is mounted on the loading rod (22), a second opening (302) adapted to the loading box (23) is provided on the crushing box (3), a cylinder (24) is fixedly mounted on the housing (1), and an output end of the cylinder (24) is fixedly connected to the U-shaped push rod (21); The loading rod (22) includes a first rod body (2201) fixedly connected to the U-shaped push rod (21) and a second rod body (2202) rotatably connected to the first rod body (2201), a guide groove (2203) is provided on the second rod body (2202), and a sliding pin (303) adapted to the guide groove (2203) is fixedly installed on the inner wall of the second opening (302).

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