A sintered silicon-carbon anode material mixing device

Abstract

The present invention provides a sintered silicon-carbon anode raw material mixing device. When it is necessary to conduct small-scale tests in the laboratory to obtain silicon-carbon raw materials, silicon powder can be first put into the ball milling cylinder, and the driving handle is rotated manually to make the swing rod drive the ball milling cylinder to perform a swinging motion. After grinding, the required silicon powder material can be obtained. Then, carbon powder raw materials can be added through the opening part, and the process of adding carbon powder raw materials is very convenient. It can be divided into multiple times according to the actual situation. When adding carbon powder, the swinging rate can also be decreased to facilitate feeding. Thus, it is convenient to adjust the ratio of carbon powder raw materials to silicon powder at any time, and sampling can be interrupted at any time after mixing. That is, a sampling spoon is inserted into the cylinder for sampling to conduct analysis or conduct analysis after sintering to prepare the final product. In this way, the analysis process is also very convenient.

Description

Technical Field

[0001] The present invention relates to a mixing device for sintered silicon-carbon anode materials, and more particularly to a mixing device for sintered silicon-carbon anode materials suitable for small-scale experiments or repeated experimental analyses. Background Art

[0002] Silicon-carbon anode materials generally refer to modified materials obtained by mixing and doping silicon materials and carbon materials, thereby significantly improving the capacity and electrochemical performance of the anode materials.

[0003] Among them, silicon is a material with the highest theoretical specific volume known in the existing anode materials, which is more than 10 times that of the current mainstream graphite anode, and it has high safety, rich resource reserves, and low production costs in its application. Carbon materials have good electrical conductivity, stable structure, small volume expansion during cycling, and also have flexibility and lubricity. Therefore, in the prior art, the application of silicon-carbon anode materials has been widely studied and applied, and has become the focus of the development of future anode materials.

[0004] For example, in the Chinese patent application with the application number CN202210729550.1, a method for preparing silicon-carbon anode materials from silicon powder and graphene is disclosed, which mainly includes the following steps: ball milling and refinement, adding a dispersant and a grinding aid to purified photovoltaic waste silicon powder and then performing ball milling to refine the photovoltaic waste silicon powder particles into nano-silicon particles, and obtaining a nano-silicon dispersion after the ball milling ends; ball milling reaction, adding graphene oxide, a linker, and a coating agent to the nano-silicon dispersion, and supplementing the grinding aid and then performing a ball milling reaction, and obtaining a composite slurry after the ball milling reaction ends. After the composite slurry undergoes steps such as spray drying and sintering carbonization, a sintered silicon-carbon anode material is obtained.

[0005] In addition, there are also many technologies similar to the above steps in the prior art, and obtaining silicon-carbon anode raw materials in the preparation of such sintered silicon-carbon anode materials is a very important step. Especially considering the degree of sufficiency and particle size control in the ball milling process and the mixing process, this has a very important impact on the performance of the finally formed anode material.

[0006] In the applicant's repeated experiments, the following key points were summarized. First, it is necessary to obtain well-ball-milled silicon powder in the ball milling container, then slowly add carbon powder or a mixed carbon powder mixture, and make the dispersion based on silicon powder and the dispersion based on silicon powder be mixed and then perform a ball milling action again, so that silicon-carbon anode raw materials with good dispersibility and uniform and fine particle size can be obtained. Only by obtaining such silicon-carbon anode raw materials with good dispersion can it play a decisive promoting role in the subsequent sintering process.

[0007] Generally speaking, when preparing the raw materials for such silicon-carbon anodes in the prior art, it is difficult to slowly add carbon powder to the ground silicon powder because the existing ball milling equipment is usually a closed whole, and the process of adding carbon powder each time is rather cumbersome. In addition, when it is necessary to repeatedly sample and analyze the formed silicon-carbon raw materials of the intermediate product, it is very inconvenient to sample and analyze the mixing process of such silicon-carbon materials in the prior art. Therefore, it is very difficult to improve the efficiency in the application of the existing mixing equipment in small-scale laboratory tests and multiple analyses. Summary of the Invention

[0008] To solve the problems existing in the above technologies, the present invention provides a technology that facilitates adding carbon powder at any time after ball milling silicon powder, can facilitate adding carbon powder for mixing multiple times, and is convenient for sampling and analysis during the process.

[0009] A sintered silicon-carbon anode raw material mixing equipment provided by the present invention includes:

[0010] A frame having a notch portion;

[0011] A swing structure having a driving handle, a rotating shaft, a rotating plate, an eccentric rod, a rotating ball, a mounting block, a swing rod, and a ball milling cylinder;

[0012] Wherein, the driving handle is arranged on the upper side of the notch portion, the output shaft of the driving handle is connected to the rotating shaft, one end of the rotating shaft is provided with the rotating plate, the eccentric rod is eccentrically arranged on the rotating plate, the rotating ball is arranged at the bottom of the eccentric rod, the rotating ball is embedded and rotatably arranged in the placement groove of the mounting block, the mounting block is sleeved and fixed on the swing rod, and the swing rod is rotatably arranged in the through hole of the notch portion;

[0013] The ball milling cylinder is internally provided with spheres for ball milling, and the upper end of the ball milling cylinder has an opening for adding carbon powder raw materials and sampling and analysis.

[0014] The beneficial effects of the above solution are as follows: When it is necessary to conduct small-scale tests to obtain silicon-carbon raw materials in the laboratory, the silicon powder can be first put into the ball milling cylinder, and the driving handle is manually rotated to drive the swing rod to drive the ball milling cylinder to perform a swinging motion, so as to obtain the required silicon powder material after grinding. Then, the carbon powder raw materials can be added through the opening, and the process of adding carbon powder raw materials is very convenient, and it can be divided into multiple times according to the actual situation. When adding carbon powder, the swinging speed can also be decreased to facilitate feeding. Thus, it is convenient to adjust the ratio of carbon powder raw materials to silicon powder at any time, and sampling can be interrupted at any time after mixing, that is, a sampling spoon is inserted into the cylinder for sampling to conduct analysis or conduct analysis after sintering to prepare the final product, so that the analysis process is also very convenient.

[0015] It should be noted that the carbon powder and silicon powder can be in a fixed powder form, or mixed in the form of a paste formed by being dispersed in a liquid fluid. The process of adding the carbon powder raw material can be carried out by adding it manually slowly or by using a syringe or other automatic feeding equipment.

[0016] For the sintered silicon-carbon anode raw material mixing equipment provided by the present invention, the mounting block has a clamping opening, the clamping opening is sleeved on the swinging rod, and the clamping opening is provided with a detachable fastening bolt;

[0017] It further includes a mounting frame, the mounting frame has a mounting piece, three vertically arranged mounting rods are provided on the mounting piece, and clamping pieces are provided at the top and bottom of the mounting rods. The clamping pieces are used for clamping and fixing the upper cylinder edge part and the lower cylinder edge part of the ball milling cylinder, and the clamping pieces are connected and fixed to the mounting rods through fastening nuts.

[0018] For the sintered silicon-carbon anode raw material mixing equipment provided by the present invention, it further includes an adjusting mechanism. The adjusting mechanism includes an adjusting screw rod and a guiding block. A guiding groove is provided on the rotating plate, the guiding block is arranged on the adjusting screw rod, and the guiding block is slidably arranged in the guiding groove. One end of the guiding block is provided with the eccentric rod; the adjusting end of the adjusting screw rod passes through the outer wall of the rotating plate to form an adjusting rotating disk.

[0019] Through the setting of this structure, it can facilitate the adjustment of the position of the eccentric rod, thereby realizing the adjustment of the swinging amplitude, and thus strengthening the ball milling rate, that is, the adjustment of the swinging amplitude for grinding can be carried out according to the properties of the silicon powder and carbon powder or the required grinding requirements, and it is very convenient to use.

[0020] In addition, during the stage of adding carbon powder, for example, if the stage of adding carbon powder is 1 minute, the swinging amplitude can be controlled at a lower level within this 1 minute, which can not only ensure the vibration mixing state, but also facilitate the accurate addition of carbon powder into the ball milling cylinder.

[0021] For the sintered silicon-carbon anode raw material mixing equipment provided by the present invention, the swinging rod can perform horizontal axial movement in the through hole of the notch part, and when the driving handle rotates, the swinging rod combines rotational movement and horizontal axial movement.

[0022] Preferably, a rotating rod is provided on the mounting piece, a fixing block is provided on the swinging rod, a mounting hole is provided in the fixing block, and the rotating rod is detachably connected in the mounting hole by a threaded connection method.

[0023] Preferably, the upper top cover position of the ball milling cylinder has an installation section, the installation section has a lower threaded installation groove and an upper threaded installation groove, a detachable filter screen cylinder is arranged in the lower threaded installation groove, a dropping sample cylinder is arranged in the upper threaded installation groove in a detachable manner, and a dropping sample hole is formed in the middle of the bottom of the lower side of the dropping sample cylinder.

[0024] Preferably, the side wall of the dropping sample cylinder has pressure ventilation holes; the top of the dropping sample cylinder has a closing plate. Description of the Drawings

[0025] Figure 1 is the front view structural schematic diagram of the sintered silicon-carbon negative electrode raw material mixing equipment of the present invention;

[0026] Figure 2 is the three-dimensional partial structural schematic diagram of the sintered silicon-carbon negative electrode raw material mixing equipment of the present invention;

[0027] Figure 3 is Figure 2 the enlarged structural schematic diagram of area A of

[0028] Figure 4 is the three-dimensional partial structural schematic diagram of the sintered silicon-carbon negative electrode raw material mixing equipment of the present invention from another perspective;

[0029] Figure 5 is Figure 2 the enlarged structural schematic diagram of area A of

[0030] Figure 6 is the three-dimensional partial structural schematic diagram of the ball milling cylinder and the flexible water pipe of the sintered silicon-carbon negative electrode raw material mixing equipment of the present invention.

[0031] Description of the Reference Numerals

[0032] 10, frame; 11, notch part; 20, swing structure; 21, driving handle; 22, rotating shaft; 23, rotating plate; 24, eccentric rod; 25, rotating ball; 26, mounting block; 261, clamping port; 27, swing rod; 28, ball milling cylinder; 260, placing groove; 12, through hole; 280, opening part; 30, mounting frame; 31, mounting piece; 320, rotating rod; 321, fixing block; 32, fastening bolt; 33, mounting rod; 34, clamping piece; 35, upper cylinder edge part; 36, lower cylinder edge part; 37, fastening nut; 40, adjusting mechanism; 41, adjusting screw rod; 42, guiding block; 43, guiding groove; 44, adjusting rotating disc; 1, flexible water pipe; 283, inlet part; 284, sealing plate. Detailed Embodiments

[0033] First Embodiment:

[0034] As Figures 1 to 6As shown in the figure, a sintered silicon-carbon anode raw material mixing device provided in this embodiment includes a frame 10 and a swing structure 20;

[0035] Among them, the frame 10 has a notch 11;

[0036] The swing structure 20 has a driving handle 21, a rotating shaft 22, a rotating plate 23, an eccentric rod 24, a rotating ball 25, a mounting block 26, a swing rod 27, and a ball mill cylinder 28;

[0037] Among them, the driving handle 21 is arranged on the upper side of the notch 11, the output shaft of the driving handle 21 is connected to the rotating shaft 22, one end of the rotating shaft 22 is provided with the rotating plate 23, the eccentric rod 24 is eccentrically arranged on the rotating plate 23, the rotating ball 25 is arranged at the bottom of the eccentric rod 24, the rotating ball 25 is embedded and rotatably arranged in the placement groove 260 of the mounting block 26, the mounting block 26 is sleeved and fixed on the swing rod 27, and the swing rod 27 is rotatably arranged in the through hole 12 of the notch 11;

[0038] The ball mill cylinder 28 is internally provided with spheres for ball milling, and the upper end of the ball mill cylinder 28 has an opening 280 for adding carbon powder raw materials and sampling analysis.

[0039] In the specific application process, first add silicon powder into the ball mill cylinder 28, and then manually rotate the driving handle 21. The driving handle 21 drives the eccentric rod 24 to move through the rotating shaft 22. The eccentric rod 24 drives the mounting block 26 to swing through the rotating ball 25. When the swing rod 27 swings and rotates, it drives the ball mill cylinder 28 to form a specific reciprocating swing motion, so that the internal grinding balls repeatedly grind and contact the silicon powder placed inside, thereby obtaining silicon powder with a particle size meeting the requirements. Then slowly add carbon powder into the opening 280. The carbon powder is added quantitatively in multiple times, and during the process of adding carbon powder, the swing rate can be decreased to better accurately add the carbon powder.

[0040] In addition, according to actual needs, after a certain grinding time, sampling can be carried out by inserting a sampling tube or a spoon into the inside of the cylinder through the opening 280 and then analyzing. For example, the data of the final product obtained by sintering the formed silicon-carbon raw material can be analyzed in terms of the addition amount / adding rate of carbon powder. In addition, the data of the products obtained by sintering the silicon-carbon raw material obtained with different ball milling times can also be observed and analyzed. Thus, the convenience of grinding and preparing this silicon-carbon raw material is realized in small-scale experiments, and it is also very convenient for sampling and analysis.

[0041] Second Embodiment:

[0042] The sintered silicon-carbon negative electrode raw material mixing equipment provided by the present invention, the mounting block 26 has a clamping opening 261, the clamping opening 261 is sleeved on the swing rod 27, and the clamping opening 261 is provided with a detachable fastening bolt 32;

[0043] It further includes a mounting frame 30, the mounting frame 30 has a mounting piece 31, three vertically arranged mounting rods 33 are arranged on the mounting piece 31, clamping pieces 34 are arranged at the top and bottom of the mounting rods 33, and the clamping pieces 34 are used for clamping and fixing the upper cylinder edge part 35 and the lower cylinder edge part 36 of the ball mill cylinder 28, and the clamping pieces 34 are connected and fixed to the mounting rods 33 through fastening nuts 37.

[0044] Through the setting of this structure, the two sides of the ball mill cylinder 28 are respectively abutted against the upper cylinder edge part 35 and the lower cylinder edge part 36, and the setting of the fastening nut 37 is very convenient for installation and fixing or disassembly.

[0045] Third Embodiment:

[0046] The sintered silicon-carbon negative electrode raw material mixing equipment provided by the present invention further includes an adjusting mechanism 40, the adjusting mechanism 40 includes an adjusting screw rod 41 and a guiding block 42, a guiding groove 43 is formed on the rotating plate 23, the guiding block 42 is arranged on the adjusting screw rod 41, and the guiding block 42 is slidably arranged in the guiding groove 43, and one end of the guiding block 42 is provided with the eccentric rod 24; the adjusting end of the adjusting screw rod 41 passes through the outer wall of the rotating plate 23 to form an adjusting rotating disc 44.

[0047] Through the application of this structure, through the action of the adjusting mechanism 40, that is, the adjusting action of the adjusting screw rod 41, the guiding block 42 can be slidably adjusted in the guiding groove 43, so that the position distance of the eccentric rod 24 is adjusted, thereby achieving the adjustment of its swing amplitude, and thus adjusting the grinding rate of the spheres in the ball mill cylinder 28 according to actual needs.

[0048] Fourth Embodiment:

[0049] In the sintered silicon-carbon negative electrode raw material mixing equipment provided by the present invention, the swing rod 27 can perform horizontal axial movement in the through hole 12 of the notch part 11, and when the driving handle 21 rotates, the swing rod 27 performs a combined rotational movement and horizontal axial movement.

[0050] Through this structural setting, it can achieve two-dimensional movement, that is, it can not only make the swing rod 27 rotate and swing but also make horizontal axial movement, so that the ball mill 28 can be driven to perform two types of movement accordingly, so that the internal balls can form a two-dimensional movement mode when grinding, thereby improving the ball milling effect, or making the ball milling movement effect richer. Furthermore, through this two-dimensional movement, when mixing carbon powder and silicon powder, it can also play an effect of increasing the mixing rate.

[0051] The mounting plate 31 has a rotating rod 320 , the swing rod 27 has a fixing block 321 , the fixing block 321 has a mounting hole (not shown) in it, and the rotating rod 320 is detachably connected to the mounting hole by threaded connection.

[0052] This structural setting facilitates the connection, fixation or disassembly of the rotating rod 320 and the fixed block 321. When ball milling is required, the two are connected and fixed. In addition, when ball milling is not required and the material in the ball mill 28 needs to be poured out, the ball mill 28 can be freed by separating the rotating rod 320 and the fixed block 321. In this way, the ball mill 28 can be turned downward to allow the internal fluid to flow out from the opening 280, or other cleaning operations can be performed on the ball mill 28.

[0053] The rotating rod 320 and the fixed block 321 can be rotatably matched, that is, the ball mill 28 can be rotated to a specific angle, for example, the ball mill 28 is gradually converted from being placed vertically upward to being placed vertically downward with the opening facing downward, and the ball mill 28 is kept fixed on the swing rod.

[0054] Preferably, the bottom side of the ball mill 28 has an inlet portion 283, and a sealing plate 284 is detachably provided on the inlet portion; when the sealing plate 284 is removed, the inlet portion 283 is used to connect with the flexible water pipe 1, and keep the ball mill downward and the opening portion 280 downward, by delivering cleaning liquid to the inlet portion 283, and keeping the ball mill 28 in a swinging state so that the cleaning liquid performs a swing-type cleaning on the ball mill 28 and the fluid flows out from the opening portion 280.

[0055] The detachable separation is achieved by the rotational cooperation of the rotating rod 320 and the fixed block 321. However, in some cases, when the two are fixedly connected, the angle of placement can also be adjusted according to the actual situation, that is, the placement angle of the ball mill 28 can be adjusted. In the ball milling state, the ball mill is in a vertical placement state, and the opening 280 is facing upward. When sampling and analyzing, if the internal grinding material is in a liquid or fluid state, the ball mill 28 can be gradually tilted by the mutual rotation of the rotating rod 320 and the fixed block 321, and the ball mill 28 gradually flows out of the sampled and analyzed material from the opening 280 for later analysis. In addition, when the material in the ball mill 28 needs to be dumped after the mixed grinding action is completed, the rotating rod 320 can also be rotated relative to the fixed block 321, and the two are still connected, but at this time the ball mill 28 is rotated 180° so that the opening 280 is facing downward, and then the internal fluid flows down quickly from the opening 280.

[0056] In addition, after using the ball mill 28, when it is necessary to clean the inside of the ball mill 28, the ball mill 28 is first kept vertically upward, and then clean water or detergent is injected into the opening 280 of the ball mill 28, and then vibrating and swinging cleaning is performed, so that the purpose of rapid cleaning can be achieved, and collision and friction between the balls automatically occur, so that the balls are automatically cleaned. After a period of time, the rotating rod 320 can be rotated relative to the fixed block 321 to make the ball mill 28 downward, and the opening 280 downward, and continue to swing and vibrate, so that the cleaning fluid gradually flows out in the ball mill 28 in a vortex or spiral manner, so as to avoid the residual solids in the cleaning fluid from remaining in the cylinder body. According to actual needs, the user can gradually increase or gradually weaken the vibration amplitude, so that the internal cleaning fluid flows out from the opening.

[0057] Furthermore, an isolation net is provided at the position of the opening, and the isolation net can prevent the spheres from flowing out and only allow the silicon-carbon raw material to flow out. In addition, the isolation net is a detachable structure.

[0058] In other preferred embodiments, the upper cover position of the ball mill cylinder has an installation section, the installation section has a lower threaded installation groove and an upper threaded installation groove, a detachably connected filter screen cylinder is arranged in the lower threaded installation groove, a detachably connected dripping cylinder is arranged in the upper threaded installation groove, and a dripping hole is provided in the middle of the lower bottom of the dripping cylinder.

[0059] In a specific application, when the fluid in the ball mill 28 needs to be discharged, the filter screen can be provided to limit the balls from coming out, and when the balls need to be poured out, the filter screen can be removed.

[0060] The side wall of the sample dropping cylinder is provided with pressure ventilation holes; the top of the sample dropping cylinder is provided with a closing plate.

Claims

1. A sintered silicon-carbon anode raw material mixing device, characterized in that, Including: A frame with a notch portion; A swing structure, including a driving handle, a rotating shaft, a rotating plate, an eccentric rod, a rotating ball, a mounting block, a swing rod, and a ball mill cylinder; Among them, the driving handle is arranged on the upper side of the notch portion. The output shaft of the driving handle is connected to the rotating shaft. One end of the rotating shaft is provided with the rotating plate. The eccentric rod is eccentrically arranged on the rotating plate. The rotating ball is arranged at the bottom of the eccentric rod. The rotating ball is embedded and rotatably arranged in the placement groove of the mounting block. The mounting block is sleeved and fixed on the swing rod. The swing rod is rotatably arranged in the through hole of the notch portion; The ball mill cylinder is internally provided with spheres for ball milling. The upper end of the ball mill cylinder has an opening portion for adding carbon powder raw materials and sampling analysis; It further includes an adjusting mechanism. The adjusting mechanism includes an adjusting screw rod and a guiding block. The rotating plate is provided with a guiding groove. The guiding block is arranged on the adjusting screw rod, and the guiding block is slidably arranged in the guiding groove. One end of the guiding block is provided with the eccentric rod; the adjusting end of the adjusting screw rod passes through the outer wall of the rotating plate to form an adjusting rotating disc; The adjusting mechanism enables the adjustment of the swing amplitude, thereby strengthening the ball milling rate, that is, the adjustment of the swing amplitude for ball milling according to the properties of silicon powder and carbon powder or the required grinding requirements; It further includes a mounting frame. The mounting frame has a mounting piece. Three sets of mounting rods arranged vertically are provided on the mounting piece. Clamping pieces are provided at the top and bottom of the mounting rods. The clamping pieces are used for clamping and fixing the upper cylinder edge portion and the lower cylinder edge portion of the ball mill cylinder, and the clamping pieces are connected and fixed to the mounting rods through fastening nuts; The mounting piece is provided with a rotating rod. The swing rod is provided with a fixing block. The fixing block is internally provided with a mounting hole. The rotating rod is detachably connected in the mounting hole by a threaded connection method; When it is not necessary to perform ball milling but it is necessary to pour out the materials in the ball mill cylinder, the ball mill cylinder is made free by separating the rotating rod from the fixing block, so that the ball mill cylinder can be turned downward and the internal fluid can flow out from the opening portion.

2. The sintered silicon-carbon anode material mixing equipment according to claim 1, characterized in that The mounting block has a clamping opening. The clamping opening is sleeved on the swing rod, and a detachable fastening bolt is provided on the clamping opening.

3. The sintered silicon-carbon anode raw material mixing equipment according to claim 1, characterized in that, The swing rod can perform horizontal axial movement in the through hole of the notch portion, and when the driving handle rotates, the swing rod performs a combined rotational movement and horizontal axial movement.

4. The sintered silicon-carbon anode material mixing equipment according to claim 1, characterized in that The upper top cover position of the ball mill cylinder has a mounting section. The mounting section is internally provided with a lower threaded mounting groove and an upper threaded mounting groove. A detachable filter screen cylinder is arranged in the lower threaded mounting groove. A detachable dropping sample cylinder is arranged in the upper threaded mounting groove. A dropping sample hole is provided in the middle of the bottom of the lower side of the dropping sample cylinder. Pressure ventilation holes are provided on the side wall of the dropping sample cylinder; a closing plate is provided at the top of the dropping sample cylinder.

5. The sintered silicon-carbon anode raw material mixing equipment according to claim 1, characterized in that, One side of the bottom of the ball mill cylinder has an inlet part, and a sealing plate is detachably arranged at the inlet part; after the sealing plate is removed, the inlet part is used to connect with a flexible water pipe, and the ball mill cylinder is kept with the opening part downward. By conveying cleaning liquid to the inlet part and keeping the ball mill cylinder in a swinging state, the cleaning liquid performs a swinging cleaning on the ball mill cylinder so that the fluid flows out from the opening part.

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