A high-efficiency silicon-carbon negative electrode slurry mixing device

Abstract

The application provides a high-efficiency silicon-carbon negative electrode slurry mixing device, which comprises a slurry mixing tank body, the slurry mixing tank body is provided with a slurry mixing stirrer, and the first scraper is used to adhere to the bottom wall to scrape off the material on the bottom wall to avoid the adhesion of the material on the bottom wall; in addition, the second scraper is used to scrape off the material on the side wall to realize the scraping of the side wall and further avoid the residue of the material on the side wall, so that the slurry is well mixed and stirred during the slurry mixing, the problems of the settlement and stratification of the silicon-carbon negative electrode material are avoided, and the preparation stability of the material is ensured. The first scraper rotates while revolving, that is, the first scraper rotates under the action of the driving gear, so that the first scraper can move the material on the bottom wall, and when the first scraper rotates to the position above the discharge port, the material can be driven to the position of the discharge port and moved downward along the discharge port.

Description

TECHNICAL FIELD

[0001] The present application relates to a high-efficiency silicon-carbon negative electrode slurry mixing device, in particular to a device for facilitating slurry mixing reaction of materials in a reaction tank. BACKGROUND

[0002] In recent years, the development of lithium batteries has been very rapid, which is due to its obvious advantages as energy storage and use. In order to further improve the performance of lithium batteries, the development and application of silicon-carbon negative electrode materials in lithium batteries have very broad prospects. The application of silicon-carbon negative electrode materials (carbon-silicon negative electrode materials) in lithium batteries can achieve the improvement of energy density and endurance.

[0003] In the process of preparing silicon-carbon negative electrode materials, generally includes a slurry mixing step. The slurry mixing step is to mix raw materials into a slurry-like mixture, which has a physical state similar to concrete. When it is in the reaction tank, it needs to be stirred repeatedly, otherwise it will solidify and cause the material to solidify or unevenly mix, or obvious sedimentation or stratification will occur, which will obviously affect the properties of the material. For example, in the prior art, Chinese invention patent application CN111313005A, entitled "Silicon-carbon negative electrode slurry mixing method", discloses a technical solution for the preparation and slurry mixing of silicon-carbon negative electrode materials.

[0004] Therefore, in the process of mixing materials in the preparation of silicon-carbon negative electrode materials, thorough stirring is required, especially to avoid the attachment of slurry materials to the side wall, and the materials attached to the side wall and the bottom wall cannot be well stirred, and the properties of the corresponding slurry will be obviously affected. SUMMARY

[0005] To solve the above technical problems, the present application provides a device for facilitating slurry mixing and stirring of silicon-carbon negative electrode materials after mixing to avoid the attachment of materials to the side wall.

[0006] The application provides a high-efficiency silicon-carbon negative electrode slurry mixing device, which comprises a slurry mixing tank body, wherein the slurry mixing tank body is provided with a slurry mixing stirrer, the slurry mixing stirrer comprises a driving head, a fixed rod, a rotating disc, a main stirring part and an auxiliary stirring part, the driving head is connected with the rotating disc, the fixed rod penetrates through the rotating disc, the bottom of the fixed rod is provided with a driving gear, the driving gear is located in the interior of the rotating disc, the main stirring part is provided with a first inclined rod, a first driven wheel and a first scraper, the auxiliary stirring part is provided with a second inclined rod and a second scraper, the upper end of the first inclined rod is provided with the first driven wheel, the first driven wheel is connected with the driving gear, the lower end of the first inclined rod is provided with the first scraper, and the first scraper is in contact with the bottom wall of the slurry mixing tank body; the second inclined rod is connected with the rotating disc, the bottom of the second inclined rod is connected with the second scraper, the second scraper is provided with an elastic part, and the elastic part is in contact with the side wall of the slurry mixing tank body; the middle part of the bottom wall is provided with a discharging hole, and the position of the discharging hole is provided with a control valve.

[0007] The first scraper is in contact with the bottom wall to scrape off the material on the bottom wall, the second scraper is used for scraping off the material on the side wall, and the material on the side wall is scraped off, so that the material on the side wall is prevented from being left, the slurry is well mixed and stirred during the slurry mixing, the problems of sedimentation and stratification of the silicon-carbon negative electrode material are avoided, and the preparation stability of the material is ensured. In addition, the control valve is closed during the mixing, the control valve is opened when the discharging is needed, and then the slurry moves downward along the discharging hole, the first scraper rotates while revolving, the first scraper rotates by the action of the driving gear, the first scraper moves the material on the bottom wall, and the material is moved to the position of the discharging hole and moves downward along the discharging hole when the first scraper rotates to the position above the discharging hole.

[0008] During the specific movement, the driving head drives the rotating disc to rotate, the rotating disc drives the first inclined rod and the second inclined rod to move, the first scraper and the second scraper move, the driving gear is in meshing contact with the driven gear, the first scraper rotates and moves the slurry on the bottom wall and discharges the slurry.

[0009] In one preferred embodiment, the upper side of the driving head is connected with a driving motor, the main stirring part and the auxiliary stirring part are both provided in two groups, the two groups of main stirring parts are symmetrically arranged, the two groups of auxiliary stirring parts are symmetrically arranged, and the upper end of the second inclined rod is connected with a vertical plate.

[0010] A preferred scheme further comprises a receiving assembly, which comprises a rotating mechanism, a swinging mechanism and a filter cartridge, the rotating mechanism is connected with the swinging mechanism, the rotating mechanism is used to drive the swinging mechanism to rotate, the swinging mechanism is provided with the filter cartridge, and the swinging mechanism is used to drive the filter cartridge to swing so as to vibrate the material in the filter cartridge.

[0011] In a specific application, the receiving of the material is completed through the opening of the opening of one side of the filter cartridge, that is, the receiving is completed at a position below the discharging opening, and then the vibration is completed through the filter cartridge under the action of the swinging mechanism, so that the vibration effect is realized to separate the slurry and the liquid, and the vibration filtering effect is completed after a certain time.

[0012] In many cases, in order to realize continuous operation, the mixing of the slurry in the mixing tank is completed, and then the slurry reaction of the next batch is carried out immediately. In order to prevent the mixing of each batch of slurry and realize rapid filtering, this problem is very important in actual production, that is, it is very important to keep each batch of slurry from mixing and independently stored, because it is very important for subsequent detection and batch quality control. However, the filtering structure or effect in the prior art is insufficient, or it cannot effectively correspond to the mixing batch material, which reduces the work efficiency. The receiving assembly of the present application receives one batch of slurry, then vibrates and filters the slurry, and then automatically transfers the batch of slurry to the lower receiving container, thereby realizing the process of continuous mixing, continuous vibration filtering and continuous packaging.

[0013] A preferred scheme is that the rotating mechanism comprises a driving motor, a driving wheel and a driven wheel, the driven wheel is connected with a rotating frame, and the swinging mechanism is arranged in the rotating frame.

[0014] The swinging mechanism has a swinging motor, a swinging driving wheel, a swinging driven wheel and a rotating plate connected in sequence, the driven plate is rotatably arranged on a fixed frame, an eccentric rod is arranged on the fixed frame, a swinging block is arranged on the eccentric rod, and a swinging rod is arranged on the swinging block.

[0015] In a specific application, the driving motor provides power to drive the driving wheel to rotate the driven wheel, and the driven wheel drives the rotating frame to rotate to adjust the rotation and angle of the entire swinging mechanism, so that the placement angle of the filter cartridge is adjusted, so that the filter cartridge can be aligned with the discharging opening to receive the material or perform the discharging action after filtering.

[0016] One preferred scheme is that the fixed frame is provided with a limiting plate, and the swing rod is movably arranged in a limiting hole of the limiting plate; and the fixed frame is connected to the rotating frame body.

[0017] One preferred scheme is that one end of the swing rod is provided with a fastener, the fastener is provided with an upper closing member and a lower closing member, the upper closing member and the lower closing member are provided with a closing cylinder, a turnover plate and a closing plate, the closing cylinder is hingedly connected to one end of the turnover plate, the turnover plate is rotatably arranged on a hinge shaft, and the closing plate movably closes the filter cartridge.

[0018] The upper opening and the lower opening of the filter cartridge can be closed or opened by the upper closing member and the lower closing member, so as to receive the material to be filtered or the material that has been filtered.

[0019] One preferred scheme is that the moving structure is further provided with a moving lead screw and a guide frame, the receiving assembly is arranged on the moving lead screw through a connecting frame body, and the bottom of the connecting frame body is slidably arranged in the guide frame.

[0020] The disassembling assembly is further arranged below one end side of the guide frame, and the disassembling assembly is provided with a conveying belt and a plurality of disassembling containers.

[0021] When the discharging is needed, the moving structure drives the filter cartridge of the swing member to the position above the disassembling container, then rotates the filter cartridge to the appropriate angle position through the rotating action, then opens the lower opening of the filter cartridge, and then makes the slurry move downward into the disassembling container.

[0022] The pressing member is further arranged on the upper side of the disassembling container, and the pressing member is provided with a pressing cylinder and a pressing elastic sheet, the periphery of the pressing elastic sheet is provided with an elastic brush, and the elastic brush is deeply arranged in the filter cartridge to complete the discharging action.

[0023] In order to make the slurry smoothly move downward from the disassembling container, the slurry moves downward through the action of the elastic brush at this time, and the slurry enters the disassembling container below. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of a high-efficiency silicon-carbon negative electrode slurry mixing device of the present application;

[0025] Figure 2 is a structural schematic view of a side sectional view of a high-efficiency silicon-carbon negative electrode slurry mixing device of the present application;

[0026] Figure 3 is a structural schematic view of a side sectional view of a high-efficiency silicon-carbon negative electrode slurry mixing device of the present application;

[0027] Figure 4 is a high-efficiency silicon-carbon negative electrode slurry mixing device receiving assembly plan view structural diagram of the present application;

[0028] Figure 5 is a high-efficiency silicon-carbon negative electrode slurry mixing device partial structural diagram of the present application;

[0029] Figure 6 is a high-efficiency silicon-carbon negative electrode slurry mixing device partial structural diagram of the present application;

[0030] Figure 7 is a high-efficiency silicon-carbon negative electrode slurry mixing device partial sectional view structural diagram of the present application;

[0031] Figure 8 is a high-efficiency silicon-carbon negative electrode slurry mixing device structural diagram of the present application;

[0032] Figure 9 is a high-efficiency silicon-carbon negative electrode slurry mixing device partial structural diagram of the present application. DETAILED DESCRIPTION

[0033] First embodiment:

[0034] As Figures 1 to 3 shown, the present application provides a high-efficiency silicon-carbon negative electrode slurry mixing device, which comprises a slurry mixing tank body 10, the slurry mixing tank body 10 having a slurry mixing stirrer 20, the slurry mixing stirrer 20 comprising a driving head 30, a fixed rod 21, a rotating disc 22, a main stirring part 40 and a secondary stirring part 50, the driving head 30 being connected with the rotating disc 22, the fixed rod 21 penetrating through the rotating disc 22, i.e. the rotating disc 22 rotates under the action of external force, while the internal fixed rod 21 does not rotate. The bottom of the fixed rod 21 is provided with a driving gear 25, the driving gear 25 being located inside the rotating disc 22, the main stirring part 40 being provided with a first obliquely arranged rod 41, a first driven wheel 42 and a first scraper 43, the secondary stirring part 50 being provided with a second obliquely arranged rod 51 and a second scraper 52, the upper end of the first obliquely arranged rod 41 being provided with the first driven wheel 42, the first driven wheel 42 being connected with the driving gear 25, the lower end of the first obliquely arranged rod 41 being provided with the first scraper 43, the first scraper 43 being in contact with the bottom wall of the slurry mixing tank body 10; the second obliquely arranged rod 51 being connected with the rotating disc 22, the bottom of the second obliquely arranged rod 22 being connected with the second scraper 52, the second scraper 52 being provided with an elastic part 53, the elastic part 53 being in contact with the side wall of the slurry mixing tank body 10; the middle part of the bottom wall being provided with a discharging hole 11, the position of the discharging hole 11 being provided with a control valve.

[0035] The first scraper 43 can be attached to the bottom wall to scrape off the material to avoid the attachment of the material on the bottom wall. In addition, the second scraper 52 can scrape off the material on the side wall to avoid the residue of the material on the side wall, so that the slurry can be well mixed and stirred to avoid the settlement or stratification of the silicon-carbon negative electrode material, thereby ensuring the preparation stability of the material. In addition, the control valve is closed during the mixing, and the control valve is opened when the material needs to be discharged, so that the slurry gradually moves downward along the discharge hole 11. The first scraper 43 rotates while revolving, and the first scraper 43 rotates under the action of the driving gear 25, so that the first scraper 43 can move the material on the bottom wall. When the first scraper 43 rotates to the position above the discharge hole, the material can be brought to the position of the discharge hole 43 and moved downward along the discharge hole. The gravity and the action of the first scraper 43 make the material better and more completely descend into the discharge hole.

[0036] In the specific movement, the driving head 30 drives the rotating disc 22 to rotate, and the rotating disc 22 drives the first inclined rod 41 and the second inclined rod 22 to move, so that the first scraper 43 and the second scraper 52 move, and the driving gear 25 is in contact with the first driven gear 42 to make the first scraper 43 rotate and scrape the slurry on the bottom wall.

[0037] Second embodiment:

[0038] As shown in Figures 2 to 4 the driving head 30 is connected with the driving motor 31, the main stirring part 40 and the auxiliary stirring part 50 are both two groups, the two groups of main stirring parts 40 are symmetrically arranged, the two groups of auxiliary stirring parts 50 are symmetrically arranged, and the upper end of the second inclined rod 51 is connected with the vertical plate 55.

[0039] More specifically, the driving motor 31 drives the first gear 201 to rotate, and the first gear 201 drives the second gear 202 to rotate. The second gear 202 is connected to the upper side of the driving head 30, the driving head 30 is rotatably arranged on the top wall of the slurry mixing tank 10, and the inside of the driving head 30 is a hollow structure. The fixed rod 21 is arranged in the hollow structure, and the upper end of the fixed rod 21 is connected with the top wall without rotating. That is, the driving head 30 rotates under the action of the driving motor 31 to drive the rotating disc 22 below to rotate.

[0040] The receiving assembly 60 comprises a rotating mechanism 70, a swinging mechanism 80 and a filter cylinder 90, the rotating mechanism 70 is connected with the swinging mechanism 80, the rotating mechanism 70 is used to drive the swinging mechanism 80 to rotate, the swinging mechanism 80 is provided with the filter cylinder 90, and the swinging mechanism 80 is used to drive the filter cylinder 90 to swing so that the material in the filter cylinder 90 is vibrated and filtered.

[0041] In a specific application, the material is received through the opening of one side of the filter cylinder 90, that is, the receiving is completed at a position below the discharging hole 43, and then the opening is closed, and then the vibration is completed through the filter cylinder 90 under the action of the swinging mechanism 80, so that the vibration effect is realized to separate the slurry and the liquid, and the vibration filtering effect is completed after a certain time.

[0042] In many cases, in order to realize continuous operation, the slurry mixing in the slurry mixing tank 10 is completed, and then the next batch of slurry reaction is carried out, and in order to prevent the mixing of each batch of slurry and realize rapid filtering, this problem is very prominent in actual production, that is, it is very important to keep each batch of slurry from mixing and independently stored in production, because it is very important for subsequent detection and batch use quality control. However, the filtering structure or effect in the prior art is insufficient, or it cannot effectively correspond to the slurry batch material, which reduces the work efficiency. The receiving assembly 60 of the present application receives one batch of slurry, then vibrates and filters the slurry, and then automatically transfers the batch of slurry to the receiving container 61 below, thereby realizing the process of continuous slurry mixing, continuous vibration filtering and continuous packaging.

[0043] Third embodiment:

[0044] As shown in Figures 5 to 7 The rotating mechanism 70 comprises a driving motor 71, a driving wheel 72 and a driven wheel 73, the driven wheel 73 is connected with a rotating frame 74, the swinging mechanism 80 is arranged in the rotating frame 74;

[0045] The swinging mechanism 80 has a swinging motor 81, a swinging driving wheel 82, a swinging driven wheel 83 and a rotating plate 84 connected in sequence, the rotating plate 84 is rotatably arranged on a fixed frame 85, the fixed frame 85 is provided with an eccentric rod 86, the eccentric rod 86 is provided with a swinging block 87, and the swinging block 87 is provided with a swinging rod 88.

[0046] In a specific application, the driving wheel 72 is driven by the driving motor 71 to rotate the driven wheel 73, which in turn rotates the rotating frame 74 to adjust the rotation and angle of the swing mechanism 80, thereby adjusting the angle of the filter cartridge 90, so that the filter cartridge 90 can be aligned with the discharge hole 11 to receive the material or perform the discharge operation after filtering.

[0047] The fixed frame 85 has a limiting plate 89, and the swing rod 88 is movably arranged in a limiting hole 101 of the limiting plate 89. The size of the limiting hole 101 can be adjusted according to actual needs to form different vibration effects. The fixed frame 85 is connected to the rotating frame 74.

[0048] One end of the swing rod 88 has a fastener 110, which has an upper closing part 120 and a lower closing part 130. The upper closing part 120 and the lower closing part 130 have a closing cylinder 121, a turnover plate 122, and a closing plate 123. The closing cylinder 121 is hinged to one end of the turnover plate 122. The turnover plate 122 is rotatably arranged on a hinge shaft 124. The closing plate 123 movably closes the filter cartridge 90.

[0049] The upper closing part 110 and the lower closing part 120 can close or open the upper opening 91 and the lower opening 92 of the filter cartridge 90 to receive the material to be filtered or the material that has been filtered.

[0050] Fourth embodiment:

[0051] As shown in Figures 8 to 9 It also includes a moving structure 150, which has a moving lead screw 151 and a guide frame 152. The receiving assembly 60 is arranged on the moving lead screw 151 through a connecting frame 153. The bottom of the connecting frame 153 is slidably arranged in the guide frame 152.

[0052] It also includes a dispensing assembly 160 arranged below the end side of the guide frame 152. The dispensing assembly 160 has a conveyor belt 161 and a plurality of dispensing containers 162.

[0053] When the material needs to be discharged, the moving structure 150 drives the filter cartridge 90 of the swing mechanism 80 to the position above the dispensing container 162, and then rotates the filter cartridge 90 to the appropriate angle position through the rotating action, and then opens the lower opening 92 of the filter cartridge 90, and then discharges the slurry into the dispensing container 162.

[0054] Further comprising a pressing member 170, which is arranged on the upper side of the sub-packaging container 162, the pressing member 170 has a pressing cylinder 171 and a pressing elastic sheet 172, the periphery of the pressing elastic sheet 172 has an elastic brush 173, which penetrates into the filter cartridge 90 to complete the discharging action.

[0055] In order to make the slurry smoothly descend from the sub-packaging container 162, at this time the slurry is made to descend by the action of the elastic brush 173, and the slurry enters the lower sub-packaging container 162.

[0056] It should be noted that for the swing mechanism, it can also be replaced by a vibration motor, that is, connected with the filter cartridge by the vibration motor, so that the filter cartridge vibrates to form a filtering effect by the vibration of the vibration motor. And the vibration motor can be matched with the rotating mechanism, that is, the rotating mechanism has two functions, the first function is that it can form a rotating action to enhance the filtering effect while vibrating and filtering. The second function is that it can receive or discharge materials by rotating the filter cartridge.

[0057] In a further preferred embodiment, the swing mechanism can also be matched with the rotating mechanism for the filtering effect of the filter cartridge. Furthermore, the first scraper is connected to the first inclined rod by a spring structure, that is, the spring structure is generally in a compressed state, and the first inclined rod will automatically adjust when moving the first scraper on the bottom wall, or the automatic control is realized by the way of electric telescopic rod, that is, the electric telescopic rod is connected with the first scraper to realize the adjustment of the distance or contact pressure of the first scraper on the bottom wall. When the first scraper rotates, the position of the first scraper and the center position of the bottom wall will change, and the bottom wall is preferably a conical structure, that is, the center position is the lowest, and the edge position is the highest. Through the automatic adjustment of the electric telescopic rod or the automatic adjustment of the spring in this process, the first scraper can be automatically adjusted when moving on the bottom wall, that is, when moving to the discharging hole of the center position, the first scraper is automatically stretched to make the first scraper better concentrate the material on the bottom wall to the discharging hole, and when away from the center position, the first scraper is retracted following the automatic telescopic rod. The automatic telescopic rod is arranged in the first inclined rod, and one end of the automatic telescopic rod is provided with the first scraper.

Claims

1. A high-efficiency silicon-carbon negative electrode slurry mixing device, characterized in that, The application relates to a slurry mixing tank body with a slurry mixer, wherein the slurry mixer comprises a driving head, a fixed rod, a rotating disc, a main stirring part and an auxiliary stirring part; the driving head is connected with the rotating disc; the fixed rod penetrates through the rotating disc; the bottom of the fixed rod is provided with a driving gear which is located in the interior of the rotating disc; the main stirring part is provided with a first inclined rod, a first driven wheel and a first scraper; the auxiliary stirring part is provided with a second inclined rod and a second scraper; the upper end of the first inclined rod is provided with the first driven wheel which is connected with the driving gear; the lower end of the first inclined rod is provided with the first scraper which is in contact with the bottom wall of the slurry mixing tank body; the second inclined rod is connected with the rotating disc; the bottom of the second inclined rod is connected with the second scraper which is provided with an elastic part in contact with the side wall of the slurry mixing tank body; the middle part of the bottom wall is provided with a discharging hole which is provided with a control valve. The application further comprises a receiving assembly which comprises a rotating mechanism, a swinging mechanism and a filter cylinder; the rotating mechanism is connected with the swinging mechanism; the rotating mechanism is used for driving the swinging mechanism to rotate; the swinging mechanism is provided with the filter cylinder; the swinging mechanism is used for driving the filter cylinder to swing so that the material in the filter cylinder is vibrated and filtered. The rotating mechanism comprises a driving motor, a driving wheel and a driven wheel; the driven wheel is connected with a rotating frame; the swinging mechanism is arranged in the rotating frame. The swinging mechanism comprises a swinging motor, a swinging driving wheel, a swinging driven wheel and a rotating plate which are sequentially connected; the rotating plate is rotatably arranged on a fixed frame; an eccentric rod is arranged on the fixed frame; a swinging block is arranged on the eccentric rod; a swinging rod is arranged on the swinging block. One end of the swinging rod is provided with a fastener which comprises an upper closing part and a lower closing part; the upper closing part and the lower closing part are provided with a closing air cylinder, a turnover plate and a closing plate; the closing air cylinder is hingedly connected with one end of the turnover plate; the turnover plate is rotatably arranged on a hinge shaft; the closing plate is movably arranged to close the filter cylinder. The application further comprises a moving structure which comprises a moving lead screw and a guide frame; the receiving assembly is arranged on the moving lead screw through a connecting frame; the bottom of the connecting frame is slidably arranged in the guide frame. The application further comprises a sub-packaging assembly which is arranged below one end side of the guide frame; the sub-packaging assembly comprises a conveying belt and a plurality of sub-packaging containers. The application further comprises a pressing part which is arranged on the upper side of the sub-packaging container; the pressing part comprises a pressing air cylinder and a pressing elastic sheet; the periphery of the pressing elastic sheet is provided with an elastic brush which is arranged to penetrate into the filter cylinder to complete a discharging action. The upper side of the driving head is connected with a driving motor; the main stirring part and the auxiliary stirring part are both two groups; the main stirring parts of the two groups are symmetrically arranged; the auxiliary stirring parts of the two groups are symmetrically arranged; the upper end of the second inclined rod is connected with a vertical plate.

2. The efficient silicon-carbon negative electrode slurry mixing device of claim 1, wherein, ​ 3. The efficient silicon-carbon negative slurry mixing device of claim 1, wherein, The fixed frame has a limiting plate, and the swing rod is movably arranged in a limiting hole of the limiting plate; and the fixed frame is connected to the rotary frame body.

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