CN220559158U - Electrode material granulating device - Google Patents
Electrode material granulating device Download PDFInfo
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- CN220559158U CN220559158U CN202321394333.8U CN202321394333U CN220559158U CN 220559158 U CN220559158 U CN 220559158U CN 202321394333 U CN202321394333 U CN 202321394333U CN 220559158 U CN220559158 U CN 220559158U
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Abstract
The utility model discloses an electrode material granulating device, which comprises: the granulating cavity is of a closed cavity structure, and is provided with a feed inlet and a discharge outlet; the granulating clamp plate is provided with a plurality of granulating holes, the granulating holes are through holes, the granulating clamp plate is fixedly arranged in a granulating cavity, and the cavity of the granulating cavity is divided into two independent cavities, namely a feeding cavity and a discharging cavity; the material pressing mechanism is arranged in the feeding cavity and is used for pressing materials in the feeding cavity into the granulating holes; the pushing and cutting mechanism comprises at least one pushing and cutting plate which is horizontally arranged, and when the pushing and cutting plate is driven to move along the horizontal direction, the pushing and cutting plate can be sent into the discharging cavity and the lower end of the granulating hole on the granulating clamping plate is blocked, or the pushing and cutting plate is withdrawn from the discharging cavity to release the blocking of the lower end of the granulating hole. The device can realize the automatic granulation operation of electrode materials, and degree of automation is high, and granulation efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of battery material processing, and particularly relates to an electrode material granulating device.
Background
The lithium ion battery is used as an electrochemical energy storage unit with excellent comprehensive performance at present and becomes an important component in the fields of digital products, new energy automobiles, energy storage, aerospace and the like. The anode and cathode materials are one of the key core materials of the lithium ion battery, and directly determine the overall performance index of the battery. The main current positive and negative electrode materials in the market at present mostly adopt surface modification technology to realize the charge and discharge performance of the materials, and the common surface modification technology adopts a coating mode, particularly the coating of carbon materials, which can be used as an ion transmission layer to increase the conductivity of the bulk material, has stable chemical property and can inhibit the side reaction of the bulk material and electrolyte. Particularly, when the carbon coating is applied to the field of silicon-based anode materials, the first charge and discharge efficiency, the circulation stability and the multiplying power performance of the anode materials can be improved, and the electrochemical performance and the mechanical performance of the materials can be improved so as to meet the requirements of high-safety and high-energy-density batteries, thereby effectively solving the safety and mileage concerns of end users.
At present, when carbon coating operation is carried out, a mode of mixing a precursor with a liquid phase of a carbon source, spray drying, granulating, mixing a solid phase and then sintering and carbonizing is generally adopted. The liquid phase mixing spray drying granulation coating mode is to disperse a carbon-containing carbon source and a precursor in a solvent, mix, spray and dry the mixture to form; the defects are that the productivity is small, the cost of spraying equipment is high, a large amount of solvent is needed, a spray head is easy to block during spraying, spraying particles are small, the particle density control is limited, and during sintering carbonization, the particles are easy to connect and agglomerate after carbon source melting, and a coating layer is damaged by later crushing, so that the coating effect is poor. The solid phase mixed sintering coating mode is that after a carbon source and a solid phase of a precursor are directly mixed mechanically, the solid phase mixed sintering coating mode is heated, sintered and coated, and has the defects that a coating material is softened by heating, melted, easily crosslinked, agglomerated and hardened, a coating layer is easily broken and damaged, grease/hydrocarbon/ash of the carbon source cannot be thoroughly volatilized when a mixture is stacked thickly, and the quality of an electrode material is seriously affected.
Therefore, there is a need for an apparatus capable of mixing and granulating a precursor and a carbon source to achieve sintering after macro-granulating an electrode material, and to solve the problems of the conventional solid-phase mixed sintering cladding method.
Disclosure of Invention
The utility model aims to provide an electrode material granulating device which can realize automatic granulating operation of electrode materials.
The utility model is realized by the following technical scheme:
an electrode material granulating apparatus comprising:
the granulating cavity is of a closed cavity structure, and is provided with a feed inlet and a discharge outlet;
the granulating clamp plate is provided with a plurality of granulating holes, the granulating holes are through holes, the granulating clamp plate is fixedly arranged in a granulating cavity, the cavity of the granulating cavity is divided into two independent cavities, namely a feeding cavity and a discharging cavity, the feeding hole is communicated with the feeding cavity, and the discharging hole is communicated with the discharging cavity;
the material pressing mechanism is arranged in the feeding cavity and used for pressing materials in the feeding cavity into the granulating holes;
the pushing and cutting mechanism comprises at least one pushing and cutting plate which is horizontally arranged, and when the pushing and cutting plate is driven to move along the horizontal direction, the pushing and cutting plate can be sent into the discharging cavity and the lower end of the granulating hole on the granulating clamping plate is blocked, or the pushing and cutting plate is withdrawn from the discharging cavity to release the blocking of the lower end of the granulating hole.
In some embodiments, the press mechanism includes a press roller assembly disposed on the granulation card and a first drive for driving the press roller assembly to roll on the granulation card.
In some embodiments, the press roller assembly includes at least one press roller rotatable about a vertical central axis of the granulation card, and the first drive member drives the press roller in rotation.
In some embodiments, the granulation clamping plate is provided with a fixed shaft along the vertical central axis thereof, one end of the fixed shaft is fixedly connected with the granulation clamping plate, and the other end of the fixed shaft is provided with a rotating shaft which is in rotating fit with the fixed shaft, so that the rotating shaft can rotate on the fixed shaft around the axis of the fixed shaft;
the pressing roller is connected with the rotating shaft, and the first driving piece is connected with the rotating shaft and drives the pressing roller to rotate around the axis of the fixed shaft through the rotating shaft when driving the rotating shaft to rotate.
In some embodiments, a ball assembly is disposed between the stationary shaft and the rotating shaft to form a rolling fit between the rotating shaft and the stationary shaft.
In some embodiments, the rotating shaft is of a hollow structure, and the output shaft of the first driving member is matched and arranged in the rotating shaft to be in transmission connection with the rotating shaft.
In some embodiments, the fixed shaft is of a hollow structure, and the output shaft of the first driving member extends into the fixed shaft and is in clearance fit with the fixed shaft.
In some embodiments, the prilling orifice upper end is provided as a counter bore structure.
In some embodiments, a plurality of protrusions corresponding to the granulating holes are distributed on the circumferential surface of at least one of the pressing rollers in the pressing roller assembly, and when the pressing rollers roll on the granulating clamping plate, the protrusions can be matched and fall into the counter bore structure of the granulating holes.
In some embodiments, the pushing and cutting mechanism comprises two pushing and cutting plates which are oppositely arranged, wherein the pushing and cutting plates are respectively connected with corresponding second driving pieces, and the second driving pieces drive the pushing and cutting plates to move close to or away from each other in the horizontal direction.
Compared with the prior art, the utility model has the following advantages:
1) The device can realize the automatic granulation operation of electrode materials, and degree of automation is high, and granulation efficiency is high.
2) When the device is adopted for granulation operation, the contact surface between the coating material and the precursor can be increased, the particle size of the particles obtained by granulation is controllable, the particle compactness can be well ensured through cooperation with a pushing and cutting mechanism, the particle compactness can be flexibly adjusted according to the requirement, the subsequent sintering quality of the particles can be well ensured, the performance of the electrode material is ensured, and the device has important promotion effects on the performance such as the capacity, multiplying power, circulation stability and the like of the product.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the electrode material granulating apparatus of the present utility model.
FIG. 2 is a front view showing the structure of the electrode material granulating apparatus of the present utility model.
FIG. 3 is a schematic diagram of the granulating cavity and the pushing and cutting mechanism of the electrode material granulating device.
Fig. 4 is a schematic cross-sectional view of fig. 3 toward the inside of the illustration.
Fig. 5 is a top view of the structure of the pressing mechanism in fig. 3 disposed in the granulating cavity.
Fig. 6 is a schematic view of the cross section B-B of fig. 5.
Fig. 7 is a partial schematic view of fig. 6 at E.
Wherein:
10. a frame;
20. the granulating cavity, 201, the feeding cavity, 202, the discharging cavity, 203, the feeding port, 204 and the discharging port;
30. granulating clamping plates, 301, granulating holes, 311, counter bore structures, 302 and hole sleeves;
401. the first driving part, 402, the pressing roller, 403, the fixed shaft, 404, the rotating shaft, 405, the ball component, 406, the connecting part, 407, the bulge, 408 and the scraping plate;
50. a push-cutting mechanism 501, a push-cutting plate 502 and a second driving piece.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.
According to the electrode material granulating device, after a precursor and a carbon source are subjected to solid-phase stirring and mixing, macroscopic granulation is carried out in the granulating device, so that particles with certain radial and transverse dimensions and certain compaction density can be obtained, the radial and transverse dimensions and compaction density of the particles can be adjusted according to requirements, the effective contact area between a coating material and the precursor can be increased by the particles obtained after granulating operation, meanwhile, the problem of agglomeration among the particles caused by sintering carbonization can be well solved, and the damage to a coating layer caused by a crushing procedure is further reduced; and the gaps among particles obtained by the granulating operation are increased, so that volatile matters can be timely discharged during particle sintering, the sintering carbonization quality is improved, and the performance of the electrode material is further improved.
Referring to fig. 1 to 6, the electrode material granulating apparatus of the present embodiment includes:
a frame 10, the frame 10 being used for fixing the granulation chamber 20.
The granulating cavity 20 is of a closed cavity structure, the granulating cavity 20 is made of alloy steel materials, preferably stainless steel, and the wall thickness of the granulating cavity can be 3-8mm. The granulation chamber may be fixedly connected to the frame 10 by means of an annular collar. A feed port 203 is provided at the upper end of the granulation chamber 20 for feeding of the granulation chamber, and a corresponding loading hopper may be provided at the feed port of the granulation chamber to assist feeding. A discharge port 204 is arranged at the lower end of the granulating cavity so as to facilitate the discharge after granulation. Of course, in order to facilitate discharging, the lower part of the granulating cavity can be provided with a funnel-shaped structure, and the discharging hole is arranged at the bottom position of the granulating cavity; and a corresponding discharging flange can be arranged at the discharging hole so as to facilitate the connection of the receiving bag to the discharging hole 204.
Generally, the granulating cavity 20 may be provided in a square or circular shape, and in this embodiment, the granulating cavity 20 is provided in a circular shape for convenience in other components and the arrangement of the movement mechanism therein, and for improving the utilization efficiency of the granulating apparatus.
The granulation cardboard 30, this granulation cardboard 30 is last the equipartition to set up a plurality of granulation holes 301, and granulation hole 301 sets up and sets up to the through-hole along granulation cardboard thickness direction for can form the granular material that will obtain when impressing the granulation downthehole with the material, set up to the through-hole structure and then make things convenient for the material granule to discharge in the granulation hole, in order to realize continuous granulation operation. The granulation clamping plate 30 is fixedly arranged in the granulation cavity 20, and at this time, the granulation clamping plate 30 divides the cavity in the granulation cavity into two independent cavities, namely a feeding cavity 201 positioned at the upper part and a discharging cavity 202 positioned at the lower part. Wherein, the feed inlet 203 communicates with the feed cavity 201, and the discharge outlet 204 communicates with the discharge cavity 202. As the name suggests, the feed chamber is used for holding the material to be granulated through the feed inlet, and the material enters the discharge chamber after being granulated by the granulating clamping plate and is discharged from the discharge outlet.
The shape of the prilling card 30 is generally matched to the shape of the prilling cavity so that the prilling card can be secured within the prilling cavity and form a sealed connection with the interior wall of the prilling cavity. The granulating card 30 is here circular and has a diameter slightly smaller than the inner diameter of the granulating cavity, the thickness of which is generally set to 10-20mm, depending on the size of the granules to be obtained for granulation. The granulation clamping plate is preferably made of stainless steel. The diameter of the granulating hole on the granulating clamping plate can be determined according to the size of the particle; the granulating holes 301 are arranged at equal intervals, so that the granulating clamping plates are uniformly distributed.
A pressing mechanism arranged in the feeding cavity 201 and used for pressing the materials in the feeding cavity into the granulating holes 301; the mechanism for pressing the material in the feeding cavity into the granulating holes can be a pressing plate capable of moving up and down or a pressing rod corresponding to each granulating hole, or a pressing roller capable of rolling on the granulating clamping plate. The range of action of the pressing means should be such that it covers all the holes of the granulating plate, based of course on the full use of the holes of the granulating plate.
The pushing and cutting mechanism 50, the pushing and cutting mechanism 50 can be generally configured as at least one pushing and cutting plate 501 which is horizontally arranged, and the pushing and cutting plate 501 can be linearly moved or rotated in the horizontal direction, so that when the pushing and cutting plate is driven to move in the horizontal direction, the pushing and cutting plate can be sent into the discharging cavity and the lower end of the granulating hole on the granulating clamping plate can be blocked. The function is to ensure that the material is fully compacted in the granulating hole by plugging the lower end of the granulating hole, so as to ensure the compactness of the particles; the other function is that when the push-cut plate is horizontally conveyed to the lower part of the granulation clamping plate, the granules formed by the granulation holes can be cut off, so that the granules and the granulation clamping plate are separated to obtain required material granules, and continuous granulation operation is realized. Meanwhile, after the materials in the granulating holes are compacted, the pushing and cutting plate can be driven to withdraw from the discharging cavity so as to release the blocking of the lower ends of the granulating holes, and compacted particles can be extruded from the granulating holes. The pushing and cutting mechanism can complete granulation operation in the reciprocating motion entering or exiting from the discharging cavity, so that the compaction degree of the particles is ensured, and the effect of rapidly separating the particles is very remarkable.
In an embodiment, the pressing mechanism adopts a pressing roller assembly and a first driving member 401, wherein the pressing roller assembly is disposed on the granulation clamping plate 30, and the first driving member 401 is used for driving the pressing roller assembly to roll on the granulation clamping plate. The material pressing roller assembly presses the material into the granulating hole based on the self weight of the material pressing roller assembly and extrusion acting force formed between the material pressing roller assembly and the material in the rolling process. The rolling direction of the material pressing roller assembly on the granulating clamping plate is determined according to the shape of the granulating cavity, and when the granulating cavity is square, the material pressing roller assembly can roll along the length direction or the width direction of the material pressing roller assembly so as to cover the granulating holes on the whole granulating clamping plate; when the granulating cavity is circular, the pressing roller assembly can rotate along the central axis of the granulating cavity.
In one embodiment, the pressing roller assembly comprises at least one pressing roller 402, wherein the pressing roller 402 is capable of rotating around the vertical central axis of the granulating clamping plate, and the first driving member is used for driving the pressing roller to rotate; the setting can conveniently realize the setting of first driving piece like this and to the drive of swage gyro wheel.
Specifically, taking a granulation chuck plate with a circular structure as an example, a fixed shaft 403 is disposed on the granulation chuck plate 30 along a vertical central axis thereof, one end of the fixed shaft 403 is fixedly connected with the granulation chuck plate, a rotating shaft 404 is disposed at the other end of the fixed shaft 403, and the rotating shaft 404 is disposed to form a rotating fit with the fixed shaft, so that the rotating shaft can rotate on the fixed shaft along the axis of the fixed shaft. At this time, the platen roller 402 is connected to the rotation shaft 404, and the first driving member 401 is connected to the rotation shaft 404, so that the platen roller is driven to rotate around the axis of the fixed shaft by the rotation shaft when the rotation shaft 404 is driven to rotate by the first driving member 401. Like this first driving piece 401 can directly adopt current motor, through the rotation of motor direct connection axis of rotation and drive axis of rotation, not only make things convenient for the setting of motor in the device to can simplify the structure of whole device, of course can set up corresponding reduction gears as required between motor and axis of rotation, in order to satisfy the actual demand of swage idler wheel rotational speed. The motor can be fixedly arranged on a platform at the upper end of the granulating cavity.
Here the fixed shaft 403 provides positioning and support for the rotating shaft 404, and since a rotational fit is to be achieved between the rotating shaft and the fixed shaft, a ball assembly 405 may be provided between the fixed shaft and the rotating shaft, so that a rolling fit is formed between the rotating shaft and the fixed shaft. Specifically, an annular groove may be disposed at the upper end of the fixed shaft 403, another annular groove may be disposed on the end surface corresponding to the rotating shaft 404, and a closed annular space may be formed between the two annular grooves; the ball of the ball assembly is arranged in the annular space, the ball is limited by the ball clamping plate, rolling fit between the rotating shaft and the fixed shaft is realized, and friction force between the rotating shaft and the fixed shaft during rotation is reduced, so that the output efficiency of the motor is improved.
Further, the rotating shaft 404 can be set to be a hollow structure, and the output shaft of the first driving member 401 is matched and arranged in the rotating shaft and is in transmission matching connection with the rotating shaft in a key slot matching mode, so that connection between the motor and the rotating shaft is further facilitated.
Further, the fixing shaft 403 may be configured as a hollow structure, and the output shaft of the first driving member 401 extends into the fixing shaft and forms a clearance fit with the fixing shaft, so that the output shaft of the first driving member may realize positioning connection of the rotation shaft on the fixing shaft, so that the movement of the rotation shaft is more stable. Of course, a shaft shoulder structure which can be matched and extend into the fixed shaft can be arranged at the end part of the rotating shaft, and the shaft shoulder and the inside of the fixed shaft form clearance fit, so that the purpose of positioning and mounting the rotating shaft on the fixed shaft can be achieved.
In the connection manner adopted for connecting the pressing roller and the rotating shaft, the corresponding connecting piece 406 is arranged outside the rotating shaft, taking the example of arranging two pressing rollers 402 outside the rotating shaft 404 as the example, arranging two connecting pieces 406 symmetrically, arranging the two connecting pieces 406 along the axis direction of the fixed shaft respectively, arranging the rotating shaft at the end part of the other end of the connecting piece 404, and respectively installing the pressing rollers 402 on the rotating shaft in a matched manner. At this time, based on the cooperation between two swage rolls and the granulation cardboard, can realize the assistance-localization real-time support to the axis of rotation at fixed epaxial through the setting of connecting piece.
In one embodiment, as shown in fig. 7, the upper end of the granulating bore 301 is provided with a counterbore structure 311, and the angle of the counterbore structure 311 is preferably 45 °; thus, the upper end of the granulating hole is provided with a larger opening, so that the material can enter the granulating hole more conveniently.
In one embodiment, the granulation holes 301 may be formed by directly forming the desired granulation hole structure on the granulation card; or firstly processing mounting holes on the granulating clamping plate, and then mounting the hole sleeves 302 provided with the granulating holes into each mounting hole, so that the advantage is that the granulating holes with different specifications can be formed on the granulating clamping plate only by replacing the hole sleeves, or when the granulating holes are worn, only the corresponding hole sleeves are required to be replaced, and the performance of the device is further improved.
Correspondingly, based on the arrangement of the counter bore structure at the upper end of the granulating hole, a plurality of bulges 407 can be uniformly distributed on the circumferential surface of one of the pressing rollers 402 in the pressing roller assembly, the arrangement positions of the bulges 407 on the pressing rollers are in one-to-one correspondence with the positions of the granulating holes on the granulating clamping plate, and therefore, when the pressing rollers roll on the granulating clamping plate, the arranged bulges can be just matched to fall into the counter bore structure of the granulating hole. This has the advantage that by the cooperation between the boss 407 and the counterbore structure 311, the material can be better compacted in the pelleting holes for better compaction. The protrusion 407 here adopts a hemispherical structure that mates with the counterbore structure, and has a size that matches or is slightly smaller than the size of the counterbore structure.
Generally, the pressing roller assembly is arranged to comprise two pressing rollers 402, the two pressing rollers are driven to rotate in the feeding cavity simultaneously through a motor, the circumferential surface of one pressing roller 402 is arranged to be a smooth surface, the circumferential surface of the other pressing roller 402 is provided with a bulge 407, and a better pressing granulation effect can be achieved through matched rolling between the two pressing rollers.
A scraping plate 408 can be arranged at one end part of the rotating shaft outside the material pressing roller 402, and the scraping plate 408 is used for scraping materials adhered to the inner wall of the granulating cavity.
In one embodiment, the push-cut mechanism 50 is configured to include two push-cut plates 501 in combination with a circular configuration of the granulation chamber, where the two push-cut plates 501 are configured as semi-circular plates, the combination of which is just capable of forming a circular plate that mates with the lower end of the granulation card. The two pushing and cutting plates 501 are respectively connected with a second driving piece 502, and the second driving piece 502 is used for driving the two pushing and cutting plates to move close to or away from each other in the horizontal direction so as to realize the functions to be realized by the pushing and cutting mechanism. The push-cut plate 501 may be made of a plastic material with high wear resistance, high hardness and light weight, such as common engineering plastics: polyamides, polycarbonates, polyoxymethylene, polypropylene, polyesters, polystyrene, acrylonitrile-butadiene-styrene copolymer, fluoroplastic, silicone, and the like. The size of the push-cut plate is slightly larger than the diameter of the granulating cavity, and the thickness is 10-20mm. The second driving piece can adopt an electric push rod to realize the driving of the horizontal reciprocating motion of the push-cut plate. Meanwhile, through the cooperation between the wallboard of pushing away the cutting board and discharging cavity, carry out certain support to pushing away the cutting board in vertical direction, guarantee when pressing the material operation, push away the cutting board and can form stable shutoff effect to the granulation hole.
The structure and the structural characteristics adopted by the electrode material granulating device are described, the granulating device based on the structure can realize macroscopic granulating operation of the electrode material, and can prepare granules with different radial and transverse dimensions and adjustable compaction density, and the granulating operation process of the granulating device is as follows:
starting an electric push rod, pushing the pushing and cutting plate into the discharging cavity and forming a fit with the lower end of the granulating clamping plate to form a plug for the granulating hole;
starting a motor, filling the mixed materials of the mixed coating materials and the precursor into a feeding cavity through a feeding hopper, further stirring the materials under the action of a pressing roller, simultaneously filling and extruding the materials into granulating holes, and further compacting through bulges on the pressing roller;
when the target compactness is reached, starting the electric push rod, driving the pushing and cutting plate to withdraw from the discharging cavity, and removing the blocking of the granulating hole, wherein the material is continuously pressed into the granulating hole under the extrusion action of the pressing roller, the compacted material in the granulating hole is extruded out of the granulating hole, and when the extruded length reaches the set length, starting the electric push rod again, driving the pushing and cutting plate to move towards the discharging cavity, and cutting off the exposed material to obtain material particles;
the pushing and cutting plate completes one-time blanking operation while being folded, and the next granulating operation is sequentially and circularly carried out.
The effect that the electrode material granulating apparatus in the above embodiment can achieve in preparing an electrode material will be further described below with reference to specific examples.
Examples
The preparation method comprises the steps of taking nano silicon serving as a precursor, taking asphalt as a carbon source, mechanically mixing the nano silicon and the asphalt for 2 hours, taking out, and starting the granulating device to granulate, wherein the power of a motor is 2kw, the rotating speed is set to 500r/min, the weights of two pressing rollers are respectively 20kg, the discharge diameter of a granulating hole is 5mm, the granulating length is 10mm, and the pushing and withdrawing interval time of a cutting push plate is 30s.
After the granulation is finished, collecting particles, placing the particles into an appliance, moving the appliance into a high-temperature bin, and performing high-temperature sintering, wherein the sintering step comprises the following steps: the high temperature bin is heated to 400 ℃ from normal temperature at 5 ℃/min, kept for 4 hours, then heated to 850 ℃ at the same heating rate, kept for 4 hours, naturally cooled, crushed by a jaw crusher until the particle size can completely pass through a 400-mesh screen, and the composite anode material of the carbon-coated silicon can be obtained. The assembled button cell was subjected to electrochemical performance testing, and the relevant performance data are shown in table 1.
Comparative example
The difference from the examples is that the materials taken out after 2h of mechanical mixing are directly put into an appliance, the packing compaction density is ensured to be the same as the granulating density of the examples, and then holes which are equidistantly arranged are stamped on the glass rod, so that the granules are obtained. Sending the particles into a high-temperature bin, and sintering and crushing the particles, wherein the processes are the same as those of the embodiment; the assembled button cell was subjected to electrochemical performance testing, and the relevant performance data are shown in table 1.
TABLE 1
| Sample of | First time efficiency | Primary capacity of | Multiplying power performance (5C/1C) | Cycle 100cycle capacity retention |
| Examples | 87.3% | 847mAh/g | 83.2% | 93.2% |
| Comparative example | 80.4% | 1208mAh/g | 79.8% | 74.5% |
From table 1, the advantages of the first efficiency, the multiplying power performance and the circulation retention rate of the examples are obvious, and the main reason is that the effective contact area of the coating material and the precursor is increased through the granulation operation of the device, meanwhile, the particles are not agglomerated during sintering carbonization, the damage of the crushing process to the coating layer is effectively reduced, in addition, the gaps among the particles are more, and the volatile matters can be removed in time during sintering. In the embodiment, the material is better in coating and lower in damage degree during crushing, so that the performances of primary efficiency, multiplying power, circulation stability and the like are obviously improved; in the comparative example, the bulk density of the material was high, carbonization was incomplete, such as in the dark black portion, and the carbonized carbon was agglomerated seriously, such as in the gray portion, and the coating layer was destroyed when broken, such as the appearance of bare white silicon particles and the phenomenon that the silicon particles were pulled out of the holes, and the primary capacity of the button cell was high due to the high theoretical specific capacity of the bare silicon, but other properties were poor.
In the description of the present utility model, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are used to indicate orientations or positional relationships based on those shown in the drawings, or those that are conventionally put in use in the product of the present utility model, they are merely used to facilitate description of the present utility model and simplify description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "horizontal," "vertical," and the like in the description of the present utility model, if any, do not denote absolute levels or overhangs, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.
Claims (10)
1. An electrode material granulating apparatus, comprising:
the granulating cavity is of a closed cavity structure, and is provided with a feed inlet and a discharge outlet;
the granulating clamp plate is provided with a plurality of granulating holes, the granulating holes are through holes, the granulating clamp plate is fixedly arranged in a granulating cavity, the cavity of the granulating cavity is divided into two independent cavities, namely a feeding cavity and a discharging cavity, the feeding hole is communicated with the feeding cavity, and the discharging hole is communicated with the discharging cavity;
the material pressing mechanism is arranged in the feeding cavity and used for pressing materials in the feeding cavity into the granulating holes;
the pushing and cutting mechanism comprises at least one pushing and cutting plate which is horizontally arranged, and when the pushing and cutting plate is driven to move along the horizontal direction, the pushing and cutting plate can be sent into the discharging cavity and the lower end of the granulating hole on the granulating clamping plate is blocked, or the pushing and cutting plate is withdrawn from the discharging cavity to release the blocking of the lower end of the granulating hole.
2. The electrode material granulating apparatus of claim 1, wherein the pressing mechanism comprises a pressing roller assembly and a first driving member, the pressing roller assembly is disposed on the granulating clamping plate, and the first driving member is used for driving the pressing roller assembly to roll on the granulating clamping plate.
3. The electrode material granulating apparatus of claim 2, wherein the press roller assembly comprises at least one press roller rotatable about a vertical central axis of the granulating chuck, and the first driving member drives the press roller to rotate.
4. The electrode material granulating apparatus according to claim 3, wherein the granulating chuck plate is provided with a fixed shaft along a vertical central axis thereof, one end of the fixed shaft is fixedly connected with the granulating chuck plate, and the other end of the fixed shaft is provided with a rotating shaft which is in rotating fit with the fixed shaft, so that the rotating shaft can rotate on the fixed shaft around the fixed shaft axis;
the pressing roller is connected with the rotating shaft, and the first driving piece is connected with the rotating shaft and drives the pressing roller to rotate around the axis of the fixed shaft through the rotating shaft when driving the rotating shaft to rotate.
5. The electrode material granulating apparatus of claim 4, wherein a ball assembly is provided between the fixed shaft and the rotating shaft to form a rolling fit between the rotating shaft and the fixed shaft.
6. The electrode material granulating apparatus according to claim 4, wherein the rotation shaft is of a hollow structure, and the output shaft of the first driving member is fitted into the rotation shaft to be in driving connection with the rotation shaft.
7. The electrode material granulating apparatus according to claim 6, wherein the fixed shaft has a hollow structure, and the output shaft of the first driving member is inserted into the fixed shaft to be in clearance fit with the fixed shaft.
8. The electrode material granulating apparatus according to claim 3, wherein the granulating hole upper end portion is provided in a counter bore structure.
9. The electrode material granulating device according to claim 8, wherein a plurality of protrusions corresponding to the granulating holes are distributed on the circumferential surface of at least one of the pressing rollers in the pressing roller assembly, and the protrusions can be matched and fall into the counter bore structure of the granulating holes when the pressing rollers roll on the granulating clamping plate.
10. The electrode material granulating apparatus as claimed in claim 1, wherein the pushing and cutting mechanism includes two oppositely disposed pushing and cutting plates, the pushing and cutting plates being respectively connected to corresponding second driving members that drive the pushing and cutting plates to move toward or away from each other in a horizontal direction.
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|---|---|---|---|
| CN202321394333.8U CN220559158U (en) | 2023-06-02 | 2023-06-02 | Electrode material granulating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321394333.8U CN220559158U (en) | 2023-06-02 | 2023-06-02 | Electrode material granulating device |
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| CN220559158U true CN220559158U (en) | 2024-03-08 |
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