Processing device for preparing silicon-carbon negative electrode material of lithium battery

Abstract

The invention relates to the field of lithium battery material processing, in particular to a processing device for preparing a lithium battery silicon-carbon negative electrode material, which comprises a shell, a grinding base, a motor, a grinding cone, a feeding pipe, a discharging pipe, a breather pipe, a fixed circular plate and the like, the shell is fixedly connected with a grinding base; the shell is fixedly connected with a motor; the shell is rotationally connected with a grinding cone, and an output shaft of the motor is fixedly connected with the grinding cone; the shell is communicated with a feeding pipe; the shell is communicated with a discharging pipe; the shell is fixedly connected with a breather pipe, and the breather pipe is connected with an external gas transmission mechanism; the shell is fixedly connected with a fixed circular plate; and a plurality of feed openings are formed in the fixed circular plate. The vertical filter cylinder is matched with the blowing holes to blow out gas, ground mixed grinding materials are screened, the situation of accumulation and blockage can be effectively avoided, and the overall screening efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery material processing, and in particular to a processing device for preparing silicon-carbon negative electrode materials for lithium batteries. Background Art

[0002] Silicon-carbon negative electrode materials for lithium batteries are usually composites of silicon materials and carbon materials. Compared with traditional graphite negative electrodes, silicon-carbon negative electrode materials have higher rate performance, can maintain higher capacity output, and have higher battery performance, and are widely used in various fields.

[0003] Silicon-carbon negative electrode materials for lithium batteries are usually prepared by mixing silicon material powder and carbon material powder. During the processing, these silicon materials and carbon materials need to be ground, and the existing grinding equipment cannot directly grind these silicon materials and carbon materials into powders with qualified particle sizes at one time. Usually, these silicon materials and carbon materials need to be ground multiple times, and during the grinding process, some silicon materials and carbon materials are ground into powders with qualified particle sizes. Therefore, when grinding silicon materials and carbon materials, they are ground and screened multiple times, and in order to improve processing efficiency and ensure that the grinding particle sizes of the two are similar, silicon materials and carbon materials are often ground together; in the process of grinding silicon materials and carbon materials, a screen is often used to screen the mixed abrasive of the ground silicon materials and carbon materials, but in the existing screening process, the mixed abrasive is easy to accumulate on the screen, and then blockage occurs, and the screening effect is poor, which is easy to reduce the overall preparation efficiency of silicon-carbon negative electrode materials. Summary of the invention

[0004] In order to overcome the shortcomings of the existing screen screening process, in which mixed abrasives are easily accumulated on the screen and then blocked, resulting in poor screening effect and easily reducing the preparation efficiency of the overall silicon-carbon negative electrode material, the present invention provides a processing device for preparing lithium battery silicon-carbon negative electrode materials.

[0005] The technical implementation scheme of the present invention is: a processing device for preparing silicon-carbon negative electrode materials for lithium batteries, including a shell, a grinding base, a motor, a grinding cone, a feed pipe and a discharge pipe; the shell is fixedly connected to the grinding base; the shell is fixedly connected to the motor; the shell is rotatably connected to the grinding cone, and the motor output shaft is fixedly connected to the grinding cone; the shell is connected to the feed pipe; the shell is connected to the discharge pipe; it also includes a vent pipe, a fixed circular plate, an air supply pipe, a vent rod, an electric slide rail, a filter cartridge, a limit cylinder, a guide plate and a spiral plate; the shell is fixedly connected to the vent pipe, and the vent pipe is connected to an external air supply mechanism; the shell is fixedly connected to the fixed circular plate; the fixed circular plate There are several feeding ports; the fixed circular plate is fixedly connected to the limiting cylinder, and the upper side of the limiting cylinder is fixedly connected to the bottom of the grinding base; the grinding base is detachably connected to the electric slide rail; the electric slide rail is slidably connected to the filter cartridge through a slider, the filter cartridge is rotatably connected to the fixed circular plate, and the filter cartridge is located in the middle of the limiting cylinder; the fixed circular plate is fixedly connected to the ventilation rod, and the ventilation rod is located in the middle of the filter cartridge; the ventilation rod is provided with several blowing holes; the ventilation pipe is connected to an air supply pipe 1, and the air supply pipe 1 is connected to the ventilation rod; the ventilation rod is fixedly connected to a guide plate; the inner wall of the filter cartridge is fixedly connected to a spiral plate, the spiral plate is arranged in an inclined shape with the inner side higher and the outer side lower, and the spiral plate is located below the guide plate.

[0006] As a preferred technical solution of the present invention, it also includes a guide plate and a spiral plate; the ventilation rod is fixedly connected to the guide plate; the inner wall of the filter cartridge is fixedly connected to the spiral plate, and the spiral plate is located below the guide plate.

[0007] As a preferred technical solution of the present invention, the spiral plate is arranged in an inclined shape with a higher inner side and a lower outer side, and the blowing hole is arranged to be inclined downward.

[0008] As a preferred technical solution of the present invention, it also includes an elastic knocking rod; a plurality of elastic knocking rods are rotatably connected to the bottom of the grinding base through a torsion spring, and the elastic knocking rods are in contact with the surface of the filter cartridge.

[0009] As a preferred technical solution of the present invention, it also includes a connecting circular tube; the grinding cone is provided with a cavity; the ventilation rod is connected with the connecting circular tube, the connecting circular tube is rotatably connected with the grinding cone, and the connecting circular tube is connected with the cavity.

[0010] As a preferred technical solution of the present invention, the grinding cone is provided with a plurality of air outlet holes, and the air outlet holes are arranged to be inclined downward.

[0011] As a preferred technical solution of the present invention, it also includes a filter screen; the grinding base is provided with a buffer groove; the buffer groove is provided with a plurality of channels; and the filter screen is fixedly connected to the surface of the buffer groove.

[0012] As a preferred technical solution of the present invention, it also includes a connecting pipe, a second air supply pipe and an air blowing pipe; the ventilation pipe is connected to the connecting pipe; the connecting pipe is connected to the second air supply pipe, and the second air supply pipe is located at the buffer tank; the second air supply pipe is connected to a plurality of air blowing pipes.

[0013] As a preferred technical solution of the present invention, it also includes a reflux unit, and the outer shell is connected to the reflux unit for reflowing abrasives with too large particle size; the reflux unit includes a reflux pipe, a pump, a temporary storage box and a discharge trough; the outer shell is fixedly connected to the pump; the pump is connected to the reflux pipe, and the lower end of the reflux pipe passes through the fixed circular plate and is connected to the inside of the filter cartridge; the upper end of the reflux pipe is connected to the temporary storage box, and the temporary storage box is fixedly connected to the outer shell; the temporary storage box is connected to the discharge trough, and the discharge trough is located above the grinding base.

[0014] As a preferred technical solution of the present invention, a buffer spring is also included; the buffer spring for buffering the refluxed abrasive is fixedly connected inside the temporary storage box.

[0015] Beneficial effects: Compared with the existing screening using a sieve, the present invention uses a vertical filter cartridge and blows out gas through the blowing hole to screen the ground mixed abrasive, which can effectively avoid accumulation and blockage and ensure the overall screening efficiency; and in conjunction with the setting of the electric slide rail and the spiral plate, the spiral plate increases the falling time of the mixed abrasive, so that the gas blown out of the blowing hole can fully blow the ground mixed abrasive, blow away the clumped abrasive particles, and ensure the screening effect.

[0016] The hot air flow is simultaneously introduced into the cavity through the connecting circular tube, and the hot air in the cavity heats the grinding surface of the grinding cone, so that the ground mixed abrasive is heated and dried during the grinding process of the grinding cone, effectively preventing the adhesion of the ground mixed abrasive and effectively ensuring that the ground mixed abrasive is discharged downward normally. The hot air is blown out through the blowing hole, which can also heat and dry the ground abrasive particles.

[0017] Hot air is blown out through the air outlet to blow the ground mixed abrasive, accelerate the downward movement of the mixed abrasive, blow off the attached abrasive particles, and blow the abrasive particles that meet the particle size standards after grinding to accelerate their discharge from between the grinding base and the grinding cone, thereby improving the overall grinding efficiency. Compared with the existing simple grinding equipment, the present invention can screen the ground abrasive particles by passing gas, and pass gas into the grinding cone to heat the ground mixed abrasive and blow it out, so as to make full use of the gas and improve the overall screening effect and grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure disclosed by the processing device for preparing silicon-carbon negative electrode materials for lithium batteries of the present invention; Figure 2 This is a schematic diagram of the structure inside the shell disclosed by the processing device for preparing silicon-carbon negative electrode materials for lithium batteries of the present invention; Figure 3It is a schematic diagram of the combined structure of the fixed circular plate, the gas transmission pipe 1, the ventilation rod, the filter cartridge and the limiting cylinder disclosed in the processing device for preparing the silicon-carbon negative electrode material of the lithium battery of the present invention; Figure 4 It is a schematic diagram of the combined structure of the electric slide rail, filter cartridge, guide plate and spiral plate disclosed in the processing device for preparing silicon-carbon negative electrode materials for lithium batteries of the present invention; Figure 5 It is a schematic diagram of the combined structure of the guide plate, the spiral plate and the elastic knocking rod disclosed in the processing device for preparing the silicon-carbon negative electrode material of the lithium battery of the present invention; Figure 6 A cross-sectional view of a grinding cone disclosed in a processing device for preparing silicon-carbon negative electrode materials for lithium batteries of the present invention; Figure 7 It is a schematic diagram of the combined structure of the connecting circular tube, the connecting tube, the gas transmission tube 2, the blowing tube and the filter screen disclosed in the processing device for preparing the silicon-carbon negative electrode material of the lithium battery of the present invention; Figure 8 The present invention is a schematic diagram of the structure inside the temporary storage box disclosed by the processing device for preparing silicon-carbon negative electrode materials for lithium batteries.

[0019] Marked in the figure: 1-housing, 2-grinding base, 3-motor, 4-grinding cone, 5-feed pipe, 6-discharge pipe, 7-ventilation pipe, 201-fixed circular plate, 202-gas pipe 1, 203-ventilation rod, 204-electric slide rail, 205-filter cartridge, 206-limit cylinder, 207-guide plate, 208-spiral plate, 211-elastic knocking rod, 220-connecting circular pipe, 221-connecting pipe, 222-gas pipe 2, 223-blowing pipe, 224-filter screen, 301-reflux pipe, 302-pump, 303-temporary storage box, 304-discharge trough, 305-buffer shrapnel, 2001-buffer trough, 2002-channel, 20101-discharge port, 20301-blowing hole, 401-cavity, 402-air outlet. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0021] Example 1 A processing device for preparing silicon-carbon negative electrode materials for lithium batteries, such as Figure 1-Figure 7 As shown, it includes a shell 1, a grinding base 2, a motor 3, a grinding cone 4, a feed pipe 5 and a discharge pipe 6; the shell 1 is fixedly connected to the grinding base 2; the shell 1 is fixedly connected to the motor 3; the shell 1 is rotatably connected to the grinding cone 4, and the output shaft of the motor 3 is fixedly connected to the grinding cone 4; the upper side of the shell 1 is connected to the feed pipe 5; the bottom of the shell 1 is connected to the discharge pipe 6; It also includes a vent pipe 7, a fixed circular plate 201, an air supply pipe 202, a vent rod 203, an electric slide rail 204, a filter cartridge 205, a limit cylinder 206, a guide plate 207 and a spiral plate 208; the housing 1 is fixedly connected to the vent pipe 7, and the vent pipe 7 is connected to the external air supply mechanism; the housing 1 is fixedly connected to the fixed circular plate 201; the fixed circular plate 201 has six discharge ports 20101; the fixed circular plate 201 is fixedly connected to the limit cylinder 206, and the upper side of the limit cylinder 206 is fixedly connected to the bottom of the grinding base 2; the grinding base 2 is bolted to the electric slide rail 204; the electric slide rail 204 is slidably connected to the grinding base 2 through a slider. The filter cartridge 205 is rotatably connected to the fixed circular plate 201, and the filter cartridge 205 is located in the middle of the limiting cylinder 206; a ventilation rod 203 is fixedly connected to the middle of the fixed circular plate 201, and the ventilation rod 203 is located in the middle of the filter cartridge 205; the ventilation rod 203 is provided with a plurality of blowing holes 20301; the ventilation pipe 7 is connected to the air supply pipe 202, and the air supply pipe 202 is connected to the ventilation rod 203; the ventilation rod 203 is fixedly connected to a guide plate 207; the inner wall of the filter cartridge 205 is fixedly connected to a spiral plate 208, and the spiral plate 208 is arranged in an inclined shape with the inner side higher and the outer side lower, and the spiral plate 208 is located below the guide plate 207.

[0022] It also includes a guide plate 207 and a spiral plate 208 ; the ventilation rod 203 is fixedly connected to the guide plate 207 ; the inner wall of the filter cartridge 205 is fixedly connected to the spiral plate 208 , and the spiral plate 208 is located below the guide plate 207 .

[0023] The spiral plate 208 is set to be inclined with the inner side higher and the outer side lower, and the blowing hole 20301 is set to be inclined downward. By setting the spiral plate 208 to be inclined, the abrasive falling on the spiral plate 208 is restricted to prevent it from falling directly out of the spiral plate 208, thereby reducing the effect of its blowing and screening.

[0024] It also includes an elastic knocking rod 211; the bottom of the grinding base 2 is rotatably connected to ten elastic knocking rods 211 distributed in a circular array through a torsion spring, and the elastic knocking rods 211 are in contact with the surface of the filter cartridge 205.

[0025] It also includes a connecting circular tube 220; the grinding cone 4 is provided with a cavity 401; the upper side of the ventilation rod 203 is connected with a connecting circular tube 220, the connecting circular tube 220 is rotatably connected to the grinding cone 4, and the connecting circular tube 220 is connected with the cavity 401.

[0026] The grinding cone 4 is provided with a plurality of air outlet holes 402, and the air outlet holes 402 are arranged to be inclined downward. Air is blown between the grinding base 2 and the grinding cone 4 through the air outlet holes 402 to accelerate the downward movement of the ground mixed abrasive, and to blow the particles that meet the particle size requirements after grinding to accelerate their discharge from between the grinding base 2 and the grinding cone 4, thereby improving the overall grinding efficiency.

[0027] It also includes a filter 224; the grinding base 2 has a buffer groove 2001; the buffer groove 2001 has eight channels 2002; the surface of the buffer groove 2001 is fixed with a filter 224, through which the ground mixed abrasive can be preliminarily screened to reduce the pressure of the subsequent filter cartridge 205.

[0028] It also includes a connecting pipe 221, a second air supply pipe 222 and an air blowing pipe 223; the ventilation pipe 7 is connected to the connecting pipe 221; the connecting pipe 221 is connected to a second air supply pipe 222, and the second air supply pipe 222 is located at the buffer tank 2001; the second air supply pipe 222 is connected to a plurality of air blowing pipes 223.

[0029] When the silicon material and the carbon material are ground, the silicon material and the carbon material to be ground are manually placed between the grinding base 2 and the grinding cone 4 through the feed pipe 5, and then the motor 3 is controlled to work to drive the grinding cone 4 to rotate. The silicon material and the carbon material mixed between the grinding base 2 and the grinding cone 4 are crushed and ground by the rotation of the grinding cone 4. For the convenience of writing, the mixed silicon material and the carbon material are referred to as mixed abrasives below. Since the existing grinding equipment cannot directly grind these silicon materials and carbon materials into powders with qualified particle sizes at one time, it is usually necessary to grind the silicon material and the carbon material into powders with qualified particle sizes at one time. These silicon materials and carbon materials are ground multiple times, and during the grinding process, some of the silicon materials and carbon materials are ground into powders with qualified particle sizes. Therefore, when the silicon materials and carbon materials are ground, they are ground and screened multiple times. The existing screening often uses a screen to screen the mixed abrasive after grinding. However, during the existing screening process, the mixed abrasive is easy to accumulate on the screen, and then blockage occurs. The screening effect is not good, which is easy to reduce the preparation efficiency of the overall silicon-carbon negative electrode material. Therefore, during the grinding process, the external gas supply is controlled. The mechanism passes gas from the vent pipe 7 into the gas delivery pipe 202, and the gas delivery pipe 202 passes the gas into the vent rod 203 and blows it outward from the blowing hole 20301 of the vent rod 203. When the mixed abrasive between the grinding base 2 and the grinding cone 4 is ground and falls from between the grinding base 2 and the grinding cone 4 into the filter cartridge 205, the gas is blown outward through the blowing hole 20301 to blow the falling mixed abrasive and blow it onto the filter cartridge 205. The blown mixed abrasive is sieved and filtered by the filter cartridge 205. Compared with the existing method of using a sieve Mesh screening, the present invention uses a vertical filter cartridge 205 to blow out gas through the blowing hole 20301 to screen the ground mixed abrasive, which can effectively avoid accumulation and blockage and ensure the overall screening efficiency; the gas blows the abrasive particles that meet the particle size standards out of the filter cartridge 205, while the abrasive particles with larger particle sizes remain in the filter cartridge 205. The blown abrasive particles fall to the bottom of the outer shell 1 through the discharge port 20101 of the fixed circular plate 201 under the restriction of the limiting cylinder 206, and the abrasive particles after grinding and screening are subsequently collected manually through the discharge pipe 6.

[0030] Furthermore, in consideration of the fact that graphite is often used as the carbon material during the preparation of silicon-carbon negative electrode materials, graphite has strong adsorption, and the mixed abrasive particles after grinding are mutually adsorbed. When the abrasive particles are blown onto the filter cartridge 205 for screening by gas, it cannot be guaranteed that the abrasive particles that are mutually adsorbed into agglomerates can be dispersed by the gas for screening, so that these agglomerated abrasive particles eventually fall and accumulate on the fixed circular plate 201 at the lower side of the filter cartridge 205, resulting in insufficient screening of the mixed abrasive. Therefore, a spiral plate 208 is provided on the inner wall of the filter cartridge 205; grinding When the mixed abrasive falls from between the grinding base 2 and the grinding cone 4, the mixed abrasive first falls on the guide plate 207, and under the guidance of the guide plate 207 and the blowing of the blowing hole 20301, the mixed abrasive falls on the spiral plate 208 arranged on the inner wall of the filter cartridge 205, so that the mixed abrasive falls downward along the surface of the spiral plate 208, and the falling time of the mixed abrasive is increased by the spiral plate 208, so that the gas blown out of the blowing hole 20301 can fully blow the ground mixed abrasive, blow away the agglomerated abrasive particles, and ensure the screening effect.

[0031] Furthermore, while the air hole 20301 is performing air blowing and screening, the electric slide rail 204 is controlled to drive the filter cartridge 205, the spiral plate 208, and other connected parts to rotate counterclockwise from top to bottom, and the spiral plate 208 rotates to bring up the abrasive particles accumulated on the fixed circular plate 201 after screening, so that these screened abrasive particles are brought up again for air blowing and screening, and then the agglomerated abrasive particles in these screened abrasive particles can be blown and screened again, and the abrasive particles can be screened repeatedly by the rotation of the spiral plate 208, so that the screening is further sufficient; and the electric slide rail 204 drives When the filter cartridge 205 rotates, the elastic knocking rod 211 repeatedly contacts the filter cartridge 205, so as to knock and vibrate the filter cartridge 205, and shake off the abrasive particles attached to the surface of the filter cartridge 205, so as to prevent the abrasive particles from adhering to the surface of the filter cartridge 205, causing the filter cartridge 205 to be blocked, and affecting the screening effect of the filter cartridge 205; and the spiral plate 208 is arranged to be inclined with the inner side higher and the outer side lower, and the blowing hole 20301 is arranged to be inclined downward. By setting the spiral plate 208 to an inclined shape, the abrasive falling on the spiral plate 208 is restricted to prevent it from falling directly out of the spiral plate 208, thereby reducing the effect of its blowing and screening.

[0032] At the same time, since graphite is often used as a sufficient carbon material, and graphite is easy to absorb moisture in the air during placement, making the graphite moist, and then during the grinding process, the ground mixed abrasive will be moist and adhere to the surface of the grinding base 2 or the grinding cone 4, which will hinder the discharge of the ground mixed abrasive and reduce its grinding efficiency; therefore, when the external gas supply mechanism passes the gas into the ventilation rod 203 through the ventilation pipe 7, the gas output by the external gas supply mechanism is a hot air flow, and the introduced hot air flow is simultaneously passed through the connecting circular pipe 220. The hot air in the cavity 401 heats the grinding surface of the grinding cone 4, so that the ground mixed abrasive is heated and dried during the grinding process of the grinding cone 4, effectively reducing the adhesion obstacle and effectively ensuring that the ground mixed abrasive is discharged downward normally. The hot air is blown out through the blowing hole 20301, which can also heat and dry the ground abrasive particles. In addition, the electric slide rail 204 and the spiral plate 208 are configured to increase the falling time of the mixed abrasive through the spiral plate 208 to ensure the drying effect.

[0033] Furthermore, considering that after the mixed abrasive is heated and dried, it is still easy for the mixed abrasive to adhere to the surface of the grinding base 2 and the grinding cone 4 during the extrusion grinding process, so that the discharge efficiency of the mixed abrasive particles after grinding is low, thereby affecting the overall grinding efficiency. Therefore, the grinding cone 4 is provided with an air outlet 402. When hot air is introduced into the cavity 401, the gas in the cavity 401 is blown out from the air outlet 402 as the gas flows, and is blown downward between the grinding base 2 and the grinding cone 4, and the hot air is blown out through the air outlet 402. The gas is blown to the ground mixed abrasive, accelerating the downward movement of the mixed abrasive, blowing off the attached abrasive particles, and blowing the abrasive particles that meet the particle size standards after grinding to accelerate their discharge between the grinding base 2 and the grinding cone 4, thereby improving the overall grinding efficiency. Compared with the existing simple grinding equipment, the present invention can screen the ground abrasive particles by passing gas, and pass gas into the grinding cone 4 to heat the ground mixed abrasive and blow it out, so as to make full use of the gas and improve the overall screening effect and grinding efficiency.

[0034] Furthermore, in order to fully grind the mixed abrasive, the grinding path between the grinding base 2 and the grinding cone 4 is relatively long. By providing a buffer groove 2001 on the grinding base 2, a channel 2002 on the buffer groove 2001, and a filter screen 224 at the buffer groove 2001, when the mixed abrasive ground between the grinding base 2 and the grinding cone 4 moves downward and falls on the buffer groove 2001, the ground mixed abrasive can be preliminarily screened by the filter screen 224, thereby alleviating the screening pressure of the subsequent filter cartridge 205, and the mixed abrasive particles that meet the particle size requirements after grinding can pass through the filter screen 224 and fall downward from the channel 2002. It falls, and finally passes through the discharge port 20101 and falls to the bottom of the shell 1; at the same time, when the gas enters the ventilation pipe 7, the gas enters the connecting pipe 221 and the gas pipe 222 through the ventilation pipe 7 at the same time, and is blown out from the blowing pipe 223. The blowing pipe 223 can be used to blow the surface of the filter screen 224, and the mixed abrasive fallen on its surface can be blown downward to prevent it from staying on the filter screen 224, and the ground mixed abrasive will block the gas blown out of the air outlet 402, and the blowing pipe 223 can be used to blow the lower part between the grinding base 2 and the grinding cone 4, thereby improving the discharge efficiency of the mixed abrasive during grinding.

[0035] Moreover, when the grinding operation is completed later, the external gas supply mechanism is controlled to allow gas with a stronger pressure to be introduced into the ventilation pipe 7, and blown out from the blowing hole 20301 and the outlet hole 402, so as to blow and clean the space between the grinding base 2 and the grinding cone 4 and the filter cartridge 205, blow out the residual mixed abrasive, and reduce the difficulty of subsequent cleaning.

[0036] Example 2 On the basis of Example 1, Figure 2-Figure 3 and Figure 8 As shown, it also includes a reflux unit; the reflux unit includes a reflux pipe 301, a pump 302, a temporary storage box 303 and a discharge trough 304; the outer shell 1 is fixedly connected to the pump 302; the pump 302 is connected to the reflux pipe 301, and the lower end of the reflux pipe 301 passes through the fixed circular plate 201 and is connected to the inside of the filter cartridge 205; the upper end of the reflux pipe 301 is connected to the temporary storage box 303, and the temporary storage box 303 is fixedly connected to the outer shell 1; the temporary storage box 303 is connected to the discharge trough 304, and the discharge trough 304 is located above the grinding base 2.

[0037] The temporary storage box 303 further includes a buffer spring 305 ; the buffer spring 305 is fixedly connected inside the temporary storage box 303 .

[0038] On the basis of the above-mentioned embodiment 1, the abrasive particles accumulated on the fixed circular plate 201 on the lower side of the filter cartridge 205 are repeatedly lifted up, blown and screened, and then the return pipe 301 is opened by timing control, so that the abrasive particles with larger particle sizes after screening fall into the return pipe 301, and then the pump 302 is controlled to work, so that the abrasive particles collected in the return pipe 301 are transported to the temporary storage box 303, and discharged from the discharge trough 304, and the abrasive with larger particle sizes is discharged again between the grinding base 2 and the grinding cone 4, and then re-ground to make it fully ground; and, a buffer spring 305 is provided in the temporary storage box 303, and when the return pipe 301 transports the abrasive particles to the temporary storage box 303, the buffer spring 305 can intercept and buffer the transported abrasive particles, so as to prevent these refluxed abrasive particles from being transported to the grinding base 2 and the grinding cone 4 at a higher speed and splashing everywhere.

[0039] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries, comprising a housing (1), a grinding base (2), a motor (3), a grinding cone (4), a feed pipe (5) and a discharge pipe (6); the housing (1) is fixedly connected to the grinding base (2); the housing (1) is fixedly connected to the motor (3); the housing (1) is rotatably connected to the grinding cone (4), and the output shaft of the motor (3) is fixedly connected to the grinding cone (4); the housing (1) is connected to the feed pipe (5); the housing (1) is connected to the discharge pipe (6); wherein the housing (1) is characterized in that: The invention also comprises a vent pipe (7), a fixed circular plate (201), an air supply pipe (202), a vent rod (203), an electric slide rail (204), a filter cartridge (205), a limit cylinder (206), a guide plate (207) and a spiral plate (208); the housing (1) is fixedly connected with the vent pipe (7), and the vent pipe (7) is connected to an external air supply mechanism; the housing (1) is fixedly connected with the fixed circular plate (201); the fixed circular plate (201) is provided with a plurality of discharge ports (20101); the fixed circular plate (201) is fixedly connected with the limit cylinder (206), and the upper side of the limit cylinder (206) is fixedly connected to the bottom of the grinding base (2); the grinding base (2) is detachably connected with the electric slide rail (204); the electric slide rail (204) slides through the slider A filter cartridge (205) is connected, the filter cartridge (205) is rotatably connected to the fixed circular plate (201), and the filter cartridge (205) is located in the middle of the limiting cylinder (206); the fixed circular plate (201) is fixedly connected to a ventilation rod (203), and the ventilation rod (203) is located in the middle of the filter cartridge (205); the ventilation rod (203) is provided with a plurality of blowing holes (20301); the ventilation pipe (7) is connected to an air supply pipe 1 (202), and the air supply pipe 1 (202) is connected to the ventilation rod (203); the ventilation rod (203) is fixedly connected to a guide plate (207); the inner wall of the filter cartridge (205) is fixedly connected to a spiral plate (208), the spiral plate (208) is arranged in an inclined shape with a higher inner side and a lower outer side, and the spiral plate (208) is located below the guide plate (207).

2. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 1, characterized in that: It also includes an elastic knocking rod (211); the bottom of the grinding base (2) is rotatably connected to a plurality of elastic knocking rods (211) via a torsion spring, and the elastic knocking rods (211) are in contact with the surface of the filter cartridge (205).

3. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 1, characterized in that: It also includes a connecting circular tube (220); the grinding cone (4) is provided with a cavity (401); the ventilation rod (203) is connected to the connecting circular tube (220), the connecting circular tube (220) is rotatably connected to the grinding cone (4), and the connecting circular tube (220) is connected to the cavity (401).

4. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 3, characterized in that: The grinding cone (4) is provided with a plurality of air outlet holes (402), and the air outlet holes (402) are arranged to be inclined downward.

5. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 1, characterized in that: It also includes a filter screen (224); the grinding base (2) is provided with a buffer groove (2001); the buffer groove (2001) is provided with a plurality of channels (2002); and the filter screen (224) is fixedly connected to the surface of the buffer groove (2001).

6. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 5, characterized in that: It also includes a connecting pipe (221), a second air supply pipe (222) and an air blowing pipe (223); the ventilation pipe (7) is connected to the connecting pipe (221); the connecting pipe (221) is connected to the second air supply pipe (222), and the second air supply pipe (222) is located at the buffer tank (2001); the second air supply pipe (222) is connected to a plurality of air blowing pipes (223).

7. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 1, characterized in that: The invention also comprises a reflux unit, wherein the housing (1) is connected to the reflux unit for reflux abrasive with a particle size too large; the reflux unit comprises a reflux pipe (301), a pump (302), a temporary storage box (303) and a discharge trough (304); the housing (1) is fixedly connected to the pump (302); the pump (302) is connected to the reflux pipe (301), and the lower end of the reflux pipe (301) passes through the fixed circular plate (201) and is connected to the inside of the filter cartridge (205); the upper end of the reflux pipe (301) is connected to the temporary storage box (303), and the temporary storage box (303) is fixedly connected to the housing (1); the temporary storage box (303) is connected to the discharge trough (304), and the discharge trough (304) is located above the grinding base (2).

8. A processing device for preparing silicon-carbon negative electrode materials for lithium batteries according to claim 7, characterized in that: It also includes a buffer spring sheet (305); the buffer spring sheet (305) for buffering the refluxed abrasive is fixedly connected inside the temporary storage box (303).

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