Method and apparatus for producing an electrode negative material

Abstract

The application discloses a production method and a production device for an electrode negative material, and belongs to the technical field of electrode negative material production.The production method comprises the following steps: inputting the same or different raw materials; after independent and parallel grinding treatment, mixing treatment is carried out under target temperature and pressure conditions, and a target product is obtained; and the production device comprises a raw material input device, a grinding device, a mixing device and a product output device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrode negative material preparation, in particular to an electrode negative material production method and production device. BACKGROUND

[0002] With the continuous progress of society, human demand for energy application is becoming larger and larger. Energy crisis and environmental problems are becoming more and more serious, and people's demand for high-performance power supply is more urgent. Due to the decrease of mineral fuels in nature and air pollution, energy and environmental crisis is becoming more and more serious, and finding sustainable clean energy has become the top priority of the world. Magnesium-lithium batteries have developed unprecedentedly, and the magnesium-lithium battery is composed of an air positive electrode, a negative electrode, an electrolyte and a battery shell. The positive electrode material is a gas diffusion electrode, the positive electrode active material is oxygen in the air, the negative electrode material is metal magnesium, lithium and its alloy, and the electrolyte is a neutral or alkaline salt solution.

[0003] In recent years, people have conducted in-depth and extensive research on negative electrode materials. For example; the currently popular negative electrode of magnesium-lithium ion battery is formed by mixing negative electrode active material, binder, conductive agent such as acetylene black, and solvent for dissolving the binder, coating on copper foil after homogenization, and then through drying, rolling and other processes to make negative electrode sheet. The performance of the battery is determined by the positive electrode, the electrolyte, and whether the prepared negative electrode material can effectively deintercalate magnesium-lithium ions is also one of the key factors.

[0004] The negative electrode material generally needs to have the following characteristics. First: high specific energy; good reversibility of charge and discharge reaction; good compatibility with electrolyte and binder; second: small specific surface area and high true density; third: small size change during reaction and good mechanical stability; fourth: abundant resources and low price; stable in air, no toxic side effects. Most of the negative electrode materials actually used in commercial applications at present are carbon materials, such as graphite, coke, hard carbon, silicon composite, tin composite, nano-porous structured compound, etc.

[0005] The existing production method and device of electrode negative material mainly focus on how to further realize single device operation and improvement, how to splice and simply integrate between devices to adapt to different production processes; and there is little research on the scalability of production equipment, the intelligent degree of production process, the compatibility of different raw material components and component changes, thereby causing great waste of system resources, and causing the problem of low efficiency of operating many devices. Then, with the rapid development of automatic control technology, computer technology, artificial intelligence and big data technology, how to apply intelligent control technology to production practice has become an important problem and an urgent problem to be solved in the production of electrode negative material.

[0006] The application provides a production method and a production device which have strong scalability, high support for intelligent production processes, strong compatibility for different raw material components and component changes, and modified and intelligent process control. SUMMARY

[0007] The technical scheme adopted by the application to solve the technical problems is:

[0008] An electrode negative material production equipment, comprising: a feeding bin 5, a first processing device 1, a second processing device 2, a mixing processing device 4, and a third processing device 3 and a collecting device 10 connected in series with the mixing processing device 4 connected in sequence from top to bottom; wherein the first processing device 1, the second processing device 2 and the third processing device 3 are all provided with grinding units 3 organized in an array structure;

[0009] The feeding bin 5 is installed above the first processing device 2; raw materials are transported from the feeding bin 5 into the first processing device 1;

[0010] The first processing device is internally provided with a plurality of grinding units arranged in an array in rows and columns; the grinding units of adjacent rows are arranged in opposite directions; the grinding medium rotates at a first speed; the vertical distance of each row of grinding units gradually decreases as its position in the array decreases; the rotation direction of the grinding medium in each grinding unit is from the side with a smaller arc to the side with a larger arc; that is, the side facing the feeding port; the first processing device is used for preliminary crushing of independent raw materials; after the processing of each row of grinding units is sequentially performed, the first intermediate raw material of the first processing unit is obtained;

[0011] The second processing unit is internally provided with a plurality of grinding units arranged in an array in rows and columns in space; the grinding medium rotates at a second speed; wherein: the second speed is greater than the first speed; wherein: a partition plate 21 is arranged between each column of grinding units to separate each column of grinding units to form a column processing channel; the grinding units of adjacent rows are arranged in opposite directions; the vertical distance of each row of grinding units gradually decreases as its position in the array decreases; the average vertical distance of all grinding units in the second processing unit is less than the average vertical distance of all grinding units in the first processing unit; the rotation direction of the grinding medium in each grinding unit is from the side with a larger arc to the side with a smaller arc; the second processing device is used for fine grinding of independent raw materials; after the processing of each row of grinding units is sequentially performed, the second intermediate raw material of the second processing unit is obtained;

[0012] Wherein: the size of the first intermediate raw material is greater than that of the second intermediate raw material;

[0013] The grinding unit comprises a grinding material 61, a grinding base 63, a first feeding channel 62 formed between the grinding material 61 and the grinding base 63, and the grinding material 61 and the grinding base 63 are coupled to grind; the grinding material 61 can rotate 360° around the grinding base 63; the curvature of the grinding base 63 continuously decreases from one end to the other end, so that the distance between the side with large curvature and the grinding material is greater than the side with small curvature; thereby forming the first feeding channel 62 between the side with large curvature and the grinding material; the grinding particles in the upper layer of the grinding unit can fall into the first feeding channel 62 on the side with large curvature of the lower layer of the grinding unit through the side with small curvature during grinding; the vertical distance h between the grinding material and the grinding base is adjustable to adapt to different grinding stages; the rotation direction of the grinding material relative to the grinding base is changeable;

[0014] The mixing device is used to mix the second intermediate raw materials obtained by the second processing units;

[0015] The third processing unit performs heat treatment based on intelligent process control; the third processing unit comprises a plurality of grinding units arranged in a single row sequence, and a heating device is arranged at the lower part of the grinding unit; the grinding unit and the heating unit stop the rotation of the grinding unit according to the processing process during processing, so that the second intermediate raw materials fully react or compound at the target temperature, and when the grinding unit is started again subsequently according to the processing process, the intermediate products are dispersed and moved to the third discharge port of the third processing unit with the rotation of the grinding unit; the above process is repeated until the processing process is completed;

[0016] The target product obtained after the third processing unit is processed is collected into a collection device for cooling.

[0017] Further, a plurality of first processing devices are arranged side by side, so that each first processing device is used to process a plurality of different types of raw materials.

[0018] Further, inert gas is injected into the second processing device.

[0019] Further, the feeding bin 5 is a multi-separation feeding bin 5, which can simultaneously input one or more single-source raw materials; the raw materials input from each separation part enter a first processing device 1 respectively.

[0020] Further, the first speed is low speed and the second speed is high speed.

[0021] Further, the second speed is 1.5-5 times of the first speed.

[0022] Further, the first speed is 10-50 revolutions per second.

[0023] Further, the first processing unit is processed under normal temperature and pressure conditions.

[0024] Further, the array of the first processing devices is arranged as a 3*3 array.

[0025] An electrode negative material production method using the electrode negative material production equipment, the method comprising the following steps:

[0026] Step S1: feeding the same or different raw materials from different partitions of the feeding bin so that the raw materials enter each of one or more first processing devices respectively;

[0027] Step S2: obtaining first intermediate raw materials after the raw materials are pretreated by each first processing device;

[0028] Step S3: the first intermediate raw materials enter a column of processing channels of the second processing devices through the connecting channels and are processed by the second processing units to obtain second intermediate raw materials;

[0029] Step S4: the second intermediate raw materials obtained by the second processing devices enter a mixing processing device, which is used for mixing the second intermediate raw materials obtained by the second processing units;

[0030] Step S5: the mixed second intermediate raw materials are fed into the third processing devices from the direction of the third feeding port, the second intermediate raw materials are processed under the target temperature and pressure conditions to obtain target products;

[0031] Step S6: the target products obtained after the third processing units are processed are collected into a collecting device for cooling.

[0032] The electrode negative material production equipment provided by the application can achieve the following technical effects:

[0033] 1) The array type electrode negative material production equipment based on independent processing units is provided, which can be quickly reconfigured and expanded according to different production processes and intelligent control processes, improves the production efficiency and production cost, and is particularly suitable for intelligent production of electrode negative materials based on single source and several multi-source raw materials;

[0034] 2) The local control mode of the independent processing units can heat in the grinding process; through the heating mode in the grinding process based on the independent units, the heat can directly and uniformly act on the raw materials, without the need of overall and extensive temperature control of each type of processing device, greatly improving the temperature control efficiency;

[0035] 3) provide heat treatment based on intelligent flow control, disperse the product while the flow progresses, the intelligent adjustment mode of the flow progress speed is simple and easy to implement, the reflection distance, heating temperature and heating time can be adjusted according to the temperature and aggregation and size requirements of the final product, the aggregation and size form are adjusted in the production process of the target object, the temperature control and adjustment mode is simple, and the intelligent control efficiency is high; BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A structural schematic diagram of an electrode negative material production equipment provided by the application.

[0037] Figure 2 A flow schematic diagram of an electrode negative material production method provided by the application.

[0038] Fig. 3 is a schematic diagram of a grinding unit provided by the application; wherein Figure 3A is a schematic diagram of a common grinding unit, Figure 3B is a schematic diagram of a symmetric grinding unit.

[0039] Figure 4 Fig. 1 is a schematic diagram of a first processing unit provided by an embodiment of the application.

[0040] Figure 5 Fig. 2 is a schematic diagram of a second processing unit provided by an embodiment of the application.

[0041] Figure 6 Fig. 3 is a schematic diagram of a third processing unit provided by an embodiment of the application. DETAILED DESCRIPTION

[0042] The electrode negative material production method provided by the application will be described in further detail below.

[0043] The application will be described in more detail by referring to the attached drawings, which show preferred embodiments of the application. It should be understood that modifications to the application described herein can be made by a person skilled in the art while still achieving the beneficial effects of the application. Therefore, the following description should be understood as a broad general knowledge of the person skilled in the art and not as a limitation on the application.

[0044] For the sake of clarity, not all features of actual implementations are described. In the following description, well-known functions or constructions are not described in detail because they can obscure the application due to unnecessary detail. It should be understood that in the development of any actual implementation, numerous implementation-specific decisions can be made to achieve the developer's specific goals, such as compliance with system-related and business-related constraints.

[0045] To make the objectives and features of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to conveniently and clearly assist in illustrating the objectives of the embodiments of the present invention.

[0046] This application provides an electrode negative electrode material production apparatus, such as... Figure 1 As shown, it includes a feed bin 5, a first processing device 1, a second processing device 2, a mixing processing device 4 connected in sequence from top to bottom, and a third processing device 3 and a collection device 10 connected in series with the mixing processing device 4; wherein, the first processing device 1, the second processing device 2 and the third processing device 3 are each provided with a grinding unit 3 organized in an array structure. Figure 1 In one embodiment, three first processing devices 1 are provided in the production of the negative electrode material;

[0047] Preferably, the feed hopper 5 is installed above the first processing device 2; the raw material is conveyed from the feed hopper 5 into the first processing device 1, and after repeated mechanical grinding by the grinding unit based on the array structure in the pre-processing device 1, a first intermediate raw material with good particle uniformity is obtained.

[0048] Preferably, multiple first processing devices are arranged side by side, such that each first processing device is used to process multiple different types of raw materials;

[0049] The feed hopper 5 is a multi-compartment feed hopper 5, which can simultaneously feed one or more single-source raw materials; the raw materials entering from each compartment enter a first processing device 1 respectively; the first intermediate raw materials obtained after processing by each first processing device 1 enter a processing channel of a second processing device; the second intermediate raw materials obtained by the second processing device enter a mixing processing device, which is used to mix the second intermediate raw materials obtained from each second processing unit, and send the mixed second intermediate raw materials to a third processing device 3; the target product obtained after the third processing is collected in a collection device 10 for cooling.

[0050] As attached Figure 3AAs shown, the grinding unit comprises: grinding material 61, grinding base 63; a first feeding channel 62 is formed between the grinding material 61 and the grinding base 63; the grinding material 61 and the grinding base 63 are coupled to grind; the grinding material 61 is a sphere or a cylinder; the grinding base 63 is in the shape of a circular arc or a sail; the grinding material 61 can rotate around the grinding base 63 by 360°, so as to achieve the grinding purpose; the curvature of the grinding base 63 decreases from one end to the other end, so that the distance between the side with large curvature (side A shown in the figure) and the grinding material is greater than the distance between the side with small curvature (side B shown in the figure); so that the first feeding channel 62 is formed between the side with large curvature and the grinding material; the grinding particles in the upper grinding unit can fall into the first feeding channel 62 on the side with large curvature of the lower grinding unit through the side with small curvature during the grinding process; the vertical distance h between the grinding material and the grinding base is adjustable to adapt to the use and expansion requirements of different processing units and different processing stages in the different processing units; the rotation direction of the grinding material relative to the grinding base is changeable;

[0051] By setting the grinding unit, an expandable and dynamically configurable foundation is provided, and the number and arrangement of the grinding units in each unit can be set as needed, and the rotation speed, vertical distance, temperature, pressure, etc. can be dynamically configured and expanded along with the processing flow; Figures 2-5 The number and arrangement of the embodiments are merely examples;

[0052] Preferably, the sphere is a symmetrical spherical ball or an asymmetrical oval ball; the grinding base is a sail-shaped or internally circular arc-shaped table structure; Figure 2 The sail-shaped structure is shown in the embodiment;

[0053] Preferably, the single-source raw material is magnesium, lithium, graphite, quartz stone, organic carbon source, etc.;

[0054] Preferably, the single-source raw material is one or more of magnesium, lithium, zinc, aluminum, tin, manganese chloride, manganese fluoride, silicon carbide, zinc chloride, zinc sulfide, graphite, etc.; and the target product is a mixture, composite or alloy material containing magnesium and lithium materials;

[0055] Preferably, the grinding material is provided with a temperature control device; the temperature control device is a heating device or a cooling device;

[0056] As shown in the accompanying drawings, Figure 3B The structure of the symmetrical grinding unit is basically the same as that of the grinding unit; compared with the grinding unit, the grinding base 63 of the symmetrical grinding unit is a symmetrical structure, which is in the shape of a circular arc, and the curvature changes symmetrically from the center position to both ends, from small to large; so as to close the bottom of the processing unit to complete the final repeated processing in the horizontal position, and when the fixing device is loosened, the grinding base rotates to make the raw material particles located above it fall and enter the next processing unit.

[0057] Preferably, the fixing device 64 is positioned at the center of the grinding base; the fixing device can be a cross-shaped fixing; of course, multiple fixing positions can be set.

[0058] The local control method based on independent processing units provided by this invention can heat the material during the grinding process. By heating the material during the grinding process based on independent units, the heat can be applied directly and evenly to the raw material, eliminating the need for extensive temperature control of various types of processing devices and greatly improving temperature control efficiency.

[0059] As attached Figure 4 As shown, an example of a first processing unit with a 3x3 array structure is illustrated. It contains multiple grinding units arranged in rows and columns. The grinding units in adjacent rows are arranged in opposite directions. The grinding media rotates at a first speed; that is, the feed inlets are opposite in direction, and the rotation directions are opposite, etc. The vertical distance between each row of grinding units gradually decreases as their position in the array decreases; that is, the vertical distance h of the grinding units located in the upper layer of the array is greater than the vertical distance h of the grinding units located in the lower layer. The example in the figure is a 3x3 array structure; h1>=h2>=h3; the rotation direction of the grinding media in each grinding unit is from the side with a smaller arc to the side with a larger arc, that is, towards the feed inlet. The first processing device is used to pre-grind the independent raw materials; it is used to initially crush the independent raw materials, that is, the single-source raw materials; at this time, since the raw material particles are large, the rotation direction can make the larger raw material particles be continuously rolled towards the feed inlet direction for repeated grinding as the grinding medium rotates, while the lighter and smaller raw material particles will leave the feed inlet position as the grinding medium rotates and eventually fall off from the upper layer of grinding medium to enter the feed inlet of the next grinding unit; after processing each row of grinding units in sequence, the first intermediate raw material of the first processing unit is obtained; as can be seen from the figure, the feed inlet width w1 can also be adjusted as the curvature changes or the relative position between the grinding base and the grinding medium changes;

[0060] Preferably, the setting method is to use a fixing device 64 to set it at a fixed position in the first processing device; each grinding unit is provided with one or more fixing devices;

[0061] Preferably, the first processing unit is under normal temperature and pressure conditions;

[0062] As attached Figure 5As shown, a second processing unit of a 3*4 array structure is exemplified; a plurality of grinding units arranged in rows and columns in space are arranged inside the second processing unit, and a row of symmetrical grinding units are arranged at the bottom; the grinding mass rotates at a second speed; wherein: the second speed is greater than the first speed; wherein: a partition plate 21 is arranged between each column of grinding units to separate each column of grinding units to form a column processing channel; the grinding units of adjacent rows are arranged in opposite directions; the vertical distance of each row of grinding units gradually decreases as its position in the array decreases; the average vertical distance of all grinding units in the second processing unit is less than the average vertical distance of all grinding units in the first processing unit; the rotation direction of the grinding mass in each grinding unit is from the side with a large arc to the side with a small arc, that is, away from the inlet; the second processing device is used for fine grinding of independent raw materials; at this time, due to the small size of the raw material particles, the rotation direction can make the small raw material particles pass through high-speed grinding away from the inlet position along with the rotation of the grinding mass, and finally a part of the small particles enter the next round of grinding along with the grinding mass due to inertia, while another part of the small particles fall into the inlet of the next layer of grinding units; after the processing of each row of grinding units is sequentially performed, a second intermediate raw material of the second processing unit is obtained; the proportion of the part and the other part is related to the type of raw material and the rotation speed;

[0063] Alternatively: the second processing unit does not arrange a row of symmetrical grinding units at the bottom, but directly arranges a detachable bin bottom; after the grinding time arrives, the detachable bin bottom is opened to make the second intermediate raw material enter the third processing unit;

[0064] Preferably: the detachable bin bottom is opened to check the size and uniformity of the second intermediate raw material, which enters the third processing unit if it meets the conditions, otherwise, it is re-injected into the second processing unit;

[0065] Preferably: the first speed is low speed, and the second speed is high speed;

[0066] Preferably; the second speed is 1.5-5 times the first speed; for example: the first speed is 10-50 revolutions / second;

[0067] Preferably: the size of the second intermediate raw material is smaller than the size of the first intermediate raw material;

[0068] Preferably: the isolation plate is used to block temperature, particles, gas, pressure, etc.; the grinding particles can move in the column processing channel without entering other column processing channels; the isolation plate is fixed in a detachable manner, for example: a guide slot insertion manner is arranged;

[0069] Preferably: the isolation plate is a temperature isolation material, and a heat preservation material is laid outside;

[0070] Preferably, each column of grinding units in the second processing unit is used to process first intermediate particles from the same or different first processing units, that is, to process the same or different types of raw materials; by adjusting the size of the rows and columns in the second processing unit and the correspondence between each column in the second processing unit and the first processing unit, the composition of the processed negative electrode material can be adjusted; for example, a 2:1 composition ratio can be achieved by arranging (2+1) columns of second processing units; of course, the same type of raw material can also be processed in all first processing units and each column processing channel of the second processing unit, and the purpose of this is mainly to provide parallelism; because many electrode negative materials are single raw material sources or 2-3 raw material sources, such an arrangement is applicable;

[0071] The rotation speed of the grinding units in the first processing unit is less than the rotation speed of the grinding units in the second processing unit;

[0072] Preferably, a peeling device 22 is arranged on the side of the isolation plate, the peeling direction of the peeling device is opposite to the rotation direction of the grinding medium, and the peeling device is used to peel off light particles on the grinding medium; the opposite rotation direction arrangement causes the peeled light particles to move from top to bottom along the column channel; and finally move around the symmetrical grinding units of the last row (indicated by the dashed line in the middle); the grinding degree of the light particles meets the final requirements, and the light particles can quickly move to the position of the last row of processing units in the form of airflow in the column channel; Figure 6

[0073] Preferably, the peeling device 22 is a gas jet device, a sparse peeling brush, a soft peeling sheet, etc.

[0074] Preferably, the peeling device can perform bidirectional peeling to adapt to the bidirectional rotation of the grinding units; the peeling device is arranged above the left or right of the grinding medium; the gas jet loosens the particles to form a particle airflow flowing in the column space; a peeling device can be configured for each grinding unit.

[0075] The third processing unit performs heat treatment based on intelligent process control; the third processing unit includes a plurality of grinding units arranged in a single row sequence, and a heating device is arranged under the grinding units; the grinding units and the heating units are based on the processing process, the rotation of the grinding units is stopped during the processing process according to the processing process, so that the second intermediate raw material fully reacts or compounds at the target temperature and the target pressure, and when the grinding units are started again subsequently according to the processing process, the intermediate product is dispersed and moves to the third discharge port of the third processing unit with the rotation of the grinding units; the above process is repeated until the processing process is completed.

[0076] ​In a preferred embodiment, the third processing unit includes multiple grinding units arranged in a row, a heating device 7 located below the grinding units, and a reflecting device 8 located above the multiple grinding units. The reflecting device 8 includes a fixed part 81, a telescopic part 82, and a reflecting part 83. The reflecting part 83 moves up and down relative to the fixed part 81 under the action of the telescopic part. During the up and down movement, the telescopic distance hu and the reflection distance hd also change, so that the second intermediate material flying towards the reflecting part 83 is reflected to the subsequent grinding units located at different positions depending on the reflection distance hd. All grinding units rotate towards the third discharge port 92. The larger the reflection distance, the farther the reflected position, and vice versa.

[0077] At this time, the third processing unit performs heat treatment based on intelligent process control; the third processing unit includes multiple grinding units arranged in a single row; the grinding units and heating units stop rotating according to the processing flow during the processing; the progress speed of the intelligent process can be adjusted using the reflection distance; when the reflection distance increases, the progress speed of the processing flow decreases; conversely, when the reflection distance decreases, the progress speed of the processing flow increases.

[0078] As attached Figure 6 Therefore, an example of a third processing unit with a 1*5 array structure is provided; preferably, the arc of the grinding base in the grinding unit is greater than 180°, so that the rotation angle cuts outward to the side adjacent to the grinding material of the next grinding unit, allowing the second intermediate material to be directed toward the reflecting unit and reflected back to different subsequent grinding units depending on the reflection distance hd; the working process of the third processing unit is as follows: the second intermediate material is fed in from the direction of the third inlet 91; the heating device 7 is adjusted to the target temperature and the grinding unit is heated; the grinding unit is rotated so that the second intermediate material enters the subsequent grinding unit with the rotation of the grinding material and the reflection of the reflecting unit; during the processing, the rotation of the grinding unit is stopped according to the processing flow, so that the second intermediate material is at the target temperature. The reaction or combination process is fully initiated; and the grinding unit is restarted during the reaction or combination process, so that the aggregated products of the second intermediate raw material due to the reaction or combination are broken up. During the rotation, the products flying towards the reflection unit are also uniformly broken up and / or reduced in size and enter the subsequent grinding unit. As the reaction progresses, the reflection distance hd is continuously increased, so that the products flying towards the reflection unit are reflected a greater distance and enter the grinding unit located at the end of the third processing unit. At this time, as the processing progresses and the breaking up process progresses, the larger aggregated products decrease. At this time, the reflection distance is increased, and a smaller number of aggregated products reach the reflection unit, while more aggregated products will enter the subsequent grinding unit as the grinding unit rotates, and finally the processing process ends.

[0079] Preferably, as the processing flow progresses, the reflection distance hd and the rotation speed of the grinding unit are increased synchronously;

[0080] Preferably, the third processing unit is further connected to the collection unit 10 for collecting the target product produced by the third processing unit; wherein, the target product is an electrode negative electrode material; for example, the input raw materials are magnesium and zinc raw materials or carbon raw materials alone, etc.

[0081] By setting the relative positional relationship between the grinding unit and the reflective device, the reflection distance, heating temperature and heating time can be adjusted according to the temperature, aggregation and size requirements of the final product. The aggregation and size morphology of the target object can be adjusted during the generation process. The temperature control and adjustment method is simple and the intelligent control efficiency is high.

[0082] The present invention also provides a method for producing a battery negative electrode material, the method being based on the above-described battery negative electrode material production apparatus; the method includes the following steps:

[0083] Step S1: Input the same or different raw materials from different compartments of the feed hopper, so that these raw materials enter each of one or more first processing units respectively;

[0084] Step S2: The first intermediate raw material obtained after each first processing device pre-processes the raw material; at this time, the particle size of the first intermediate raw material does not yet meet the requirements;

[0085] Preferably, the pretreatment is a preliminary treatment carried out under normal temperature and pressure conditions, namely coarse-grained grinding;

[0086] Step S3: The first intermediate raw material enters a processing channel of the second processing device through the connection channel of the second processing device; after being processed by the second processing unit, the second intermediate raw material is obtained.

[0087] Preferably, the second processing unit performs fine-grain grinding under target temperature and pressure conditions.

[0088] Preferred method: Grinding is performed under conditions of inert gas injection;

[0089] Step S4: Each second processing unit processes one or more second intermediate raw materials, which are then fed into a mixing processing unit. The mixing processing unit is used to mix the second intermediate raw materials obtained from each second processing unit.

[0090] Preferably, the second intermediate raw materials from different second processing units enter the mixing processing unit sequentially or simultaneously; various types of mixing methods commonly used in the prior art can be adopted;

[0091] Step S5: The mixed second intermediate raw material is fed into the third processing device from the direction of the third inlet 91, and the second intermediate raw material is processed under the target temperature and pressure conditions to obtain the target product; Step S5 specifically includes the following steps;

[0092] Step S51: After adjusting the heating device 7 to the target temperature, heat the grinding unit; adjust the pressure in the third processing device to the target pressure; shorten the telescopic unit to reduce the reflection distance hd between the reflection unit and the grinding unit to the minimum distance;

[0093] Step S52: The mixed second intermediate raw material is fed into the third processing device from the direction of the third feed port 91. The low-speed rotating grinding unit is used to grind the second intermediate raw material into the subsequent grinding unit as the grinding medium rotates and the reflection unit is reflected. At this time, the horizontal distance of the reflection is small. When the unit time interval is reached, proceed to step S53.

[0094] Preferably, the unit time interval is a preset value; for example, 0.2 to 0.5 hours.

[0095] Step S53: Determine whether the processing of the third processing unit has ended. If yes, proceed to step 54; otherwise, further determine whether the adjustment timing has been reached. If yes, adjust one or more of the following: reflection distance, grinding unit rotation speed, target temperature and / or target pressure, and return to step 52; otherwise, proceed to step S54.

[0096] Preferred: Based on the different raw materials and the pre-set processing flow of the target product, the processing flow includes target temperature, target pressure, and the duration of holding at each target temperature and target pressure, for example, including a number of unit time intervals; during the processing, the rotation of the grinding unit is stopped as needed by the processing flow, so that the second intermediate raw material can fully react or combine at the target temperature; and during the processing, the grinding unit is restarted as needed by the processing flow, so that the aggregated products of the second intermediate raw material due to reaction or combination are reflected or broken up by the rotation of the grinding unit;

[0097] The adjustment of the reflection distance is achieved by increasing the reflection distance by reducing the length of the stretching unit;

[0098] The rotational speed of the grinding unit is increased slowly, for example, by 10 revolutions per second at each time interval. As the reaction progresses, the reflection distance hd is continuously increased, so that the products flying towards the reflection unit are reflected a greater distance and enter the grinding unit located at the end of the third processing unit, thereby accelerating the progress of the processing flow.

[0099] Preferably, the determination of whether the processing of the third processing unit has ended is specifically determined by a combination of one or more of the following: whether the feeding at the third inlet has ended, whether the discharging at the third outlet has ended; whether the preset processing flow has progressed to completion; whether the processing time of the third processing unit has reached the target time length; whether the time for which the grinding unit stops rotating has reached the target time length; and whether the reflection distance has reached the maximum value.

[0100] Step S54; The processing of the third processing unit ends; The obtained target product is removed through the third discharge port 92;

[0101] Step S6: The target product obtained after processing by the third processing unit is collected in a collection device for cooling;

[0102] The foregoing has shown and described the basic principles, main features, and advantages of the present invention; therefore, the above descriptions are merely embodiments of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only principles of the present invention. The present invention also includes various equivalent changes and modifications without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrode negative electrode material production device, characterized in that, include: The components connected in sequence from top to bottom are: a feed hopper (5), a first processing device (1), a second processing device (2), a mixing processing device (4), and a third processing device (3) and a collection device (10) connected in series with the mixing processing device (4); wherein, the first processing device (1), the second processing device (2), and the third processing device (3) are all provided with grinding units organized in an array structure; the feed hopper (5) is installed above the first processing device (2); the raw materials are conveyed from the feed hopper (5) into the first processing device (1); The first processing device contains multiple grinding units arranged in rows and columns. The grinding units in adjacent rows are arranged in opposite directions. The grinding media rotate at a first speed. The vertical distance between the bottom of the grinding media in each row and the grinding base below it gradually decreases as its position in the array decreases. The rotation direction of the grinding media in each grinding unit is selected from the side with a smaller arc to the side with a larger arc, that is, the side facing the feed inlet. The first processing device is used to perform preliminary crushing of individual raw materials. After processing each row of grinding units in sequence, the first intermediate raw material of the first processing device is obtained. The second processing device is equipped with multiple grinding units arranged in rows and columns in space; the grinding material rotates at a second speed; wherein: the second speed is greater than the first speed; wherein: a baffle plate (21) is set between each row of grinding units to separate each row of grinding units, thereby forming a column processing channel; the grinding units in adjacent rows are arranged in opposite directions; the vertical distance between the bottom of the grinding material in each row of grinding units and the grinding base below it gradually decreases as its position in the array decreases; the average vertical distance of all grinding units in the second processing device is less than the average vertical distance of all grinding units in the first processing device; the rotation direction of the grinding material in each grinding unit is selected from the side with a larger arc to the side with a smaller arc; the second processing device is used to finely grind independent raw materials; after processing each row of grinding units in sequence, the second intermediate raw material of the second processing device is obtained; Wherein: the size of the first intermediate raw material is larger than that of the second intermediate raw material; The grinding unit includes: a grinding material (61) and a grinding base (63); a first feed channel (62) is formed between the grinding material (61) and the grinding base (63); the grinding material (61) and the grinding base (63) are coupled together to perform grinding; the grinding material (61) can rotate 360° around the grinding base (63); the curvature of the grinding base (63) decreases continuously from one end to the other, so that the distance between the side with a larger curvature and the grinding material is greater than that between the side with a smaller curvature; thus, a first feed channel (62) is formed between the side with a larger curvature and the grinding material; the grinding particles in the upper grinding unit can fall into the first feed channel (62) located on the side with a larger curvature in the lower grinding unit through the side with a smaller curvature during the grinding process; the vertical distance h between the grinding material and the grinding base is adjustable to adapt to different grinding stages; the rotation direction of the grinding material relative to the grinding base is changeable; The mixing device is used to mix the second intermediate raw materials obtained from each of the second processing devices; The third processing unit performs heat treatment based on intelligent process control. The third processing unit includes multiple grinding units arranged in a single row, with heating devices laid under the grinding units. Based on the processing flow, the grinding units and heating units stop rotating during the processing, allowing the second intermediate raw material to fully react or combine at the target temperature. When the grinding units are restarted subsequently according to the processing flow, the intermediate product is dispersed and moves towards the third discharge port of the third processing unit as the grinding units rotate. The above process is repeated until the processing flow ends. The target product obtained after processing by the third processing unit is collected in a collection device for cooling.

2. The electrode negative electrode material production equipment according to claim 1, characterized in that: Multiple first processing devices are arranged in parallel, so that the first processing devices can be used to process multiple different types of raw materials.

3. The electrode negative electrode material production equipment according to claim 2, characterized in that: Inert gas is introduced into the second processing unit.

4. The electrode negative electrode material production equipment according to claim 3, characterized in that: The feed hopper (5) is a multi-section feed hopper, which can simultaneously feed one or more single-source raw materials; the raw materials entering from each section enter a first processing device.

5. The electrode negative electrode material production equipment according to claim 4, characterized in that: The second speed is 1.5 to 5 times the first speed.

6. The electrode negative electrode material production equipment according to claim 5, characterized in that: The first speed is 10-50 revolutions per second.

7. The electrode negative electrode material production equipment according to claim 6, characterized in that: The first processing device operates under normal temperature and pressure conditions.

8. The electrode negative electrode material production equipment according to claim 7, characterized in that: The array of the first processing device is arranged in a 3*3 array.

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