Automatic device for stirring powder slurry

Abstract

The utility model provides an automatic device for stirring powder slurry, relates to the technical field of lithium battery manufacturing, and solves the problems that a lithium battery material needs to be manually prepared, and time and labor are wasted. The automatic feeding device comprises a weighing bin, a solvent pipeline and a gas conveying unit, the weighing bin is provided with a weighing module, and the weighing bin and the solvent pipeline are selectively communicated with the feeding port of the stirring tank; the homogenizing pump is selectively communicated with the discharge hole of the stirring tank, and the outlet of the homogenizing pump is communicated with the stirring tank to form a first circulating dispersion system; the sand mill is selectively communicated with the discharge ports of the stirring tanks, and the outlet of the sand mill is communicated with the feed port of one of the at least two stirring tanks, so that a second circulating dispersion system is formed; and the controller is respectively in signal connection with the automatic feeding device, the stirring device, the homogenizing pump, the sand mill and the gas transmission unit. Manual batching is not needed, and time and labor are saved.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery manufacturing, and particularly to an automated device for stirring powder slurries. Background Art

[0002] With the development of industry, the rapid growth of energy consumption, and the increasingly serious pollution, PM2.5 has become a hot topic. More and more people are starting to pay attention to the harm of air pollutants to health. Words such as "new energy vehicles" and "green transportation" have become the focus. Lithium iron phosphate has the advantages of being non-toxic, pollution-free, good safety performance, wide raw material sources, low price, and long life, and has become an ideal cathode material for the new generation of lithium-ion batteries.

[0003] Slurry mixing, that is, stirring the raw materials and solvents of lithium iron phosphate in a mixer, is a key process for preparing lithium battery materials. The quality of the slurry mixing has an important impact on the consistency, internal resistance, and coating and other processing performances of lithium batteries.

[0004] However, in related technologies, the preparation of lithium battery materials usually requires manual batching and weighing, which has the technical problems of being time-consuming, laborious, and low in efficiency. Utility Model Content

[0005] In view of the above problems, the embodiments of this application provide an automated device for stirring powder slurries, which does not require manual batching, saves time and effort, and can improve the batching efficiency.

[0006] To achieve the above object, the embodiments of this application provide the following technical solutions:

[0007] The first aspect of the embodiments of this application provides an automated device for stirring powder slurries, including:

[0008] A stirring device, including at least two stirring tanks. The at least two stirring tanks include a first stirring tank and a second stirring tank. Both the first stirring tank and the second stirring tank have a feed inlet and an openable and closable discharge outlet. The first stirring tank and the second stirring tank are respectively configured to stir and disperse the lithium battery raw materials and solvents entering therein to form lithium battery materials;

[0009] Automatic feeding device, including a weighing bin, a solvent pipeline and a gas transmission unit. The weighing bin is equipped with a weighing module. The weighing bin and the solvent pipeline can be selectively communicated with the feeding port of one of the first stirring tank and the second stirring tank. The weighing bin is configured to transport lithium battery raw materials into the corresponding stirring tank. The solvent pipeline is configured to transport solvent into the corresponding stirring tank. The weighing module is configured to weigh the lithium battery raw materials in the weighing bin. The gas transmission unit has a gas transmission port located in the weighing bin, and the gas transmission port is configured to transport dry gas into the weighing bin.

[0010] A homogenizing pump can be selectively communicated with the discharge port of the first stirring tank and the second stirring tank that contains the lithium battery material. The outlet of the homogenizing pump is communicated with the feeding port of the first stirring tank and the second stirring tank that does not contain the lithium battery material to form a first circulating dispersion system.

[0011] A sand mill can be selectively communicated with the discharge port of the first stirring tank and the second stirring tank that contains the lithium battery material. The outlet of the sand mill is communicated with the feeding port of one of the first stirring tank and the second stirring tank that does not contain the lithium battery material to form a second circulating dispersion system.

[0012] A controller is respectively signal-connected to the automatic feeding device, the stirring device, the homogenizing pump, the sand mill and the gas transmission unit.

[0013] Detection devices are arranged at the discharge ports of the first stirring tank and the second stirring tank. The detection devices are signal-connected to the controller, and the detection devices are configured to detect the particle size of the lithium battery material output from the discharge ports.

[0014] In some optional embodiments, a humidity detection component is arranged in the weighing bin, and the humidity detection component is signal-connected to the controller. The humidity detection component is configured to detect the humidity in the weighing bin.

[0015] In some optional embodiments, the automatic feeding device further includes a pulse backwashing unit. The pulse backwashing unit has a backwashing port located in the weighing bin. The pulse backwashing unit is signal-connected to the controller, and the backwashing port is configured to spray compressed gas towards the weighing bin to purge the lithium battery raw materials on the wall of the weighing bin.

[0016] In some alternative embodiments, a flowmeter and a first control valve are further included. The flowmeter is disposed on the solvent pipeline, and the first control valve is disposed at the outlet of the solvent pipeline. The first control valve is configured to control the opening and closing of the outlet of the solvent pipeline. The flowmeter and the first control valve are respectively in signal connection with the controller.

[0017] In some alternative embodiments, weighing brackets are provided on opposite sides of the outer sidewall of the weighing bin. The weighing module is located at the bottom of the weighing brackets. A second control valve is provided at the discharge port of the weighing bin. A gravity sensor is provided on the weighing module. The gravity sensor and the second control valve are respectively in signal connection with the controller. The second control valve is configured to selectively open and close the discharge port of the weighing bin.

[0018] In some alternative embodiments, the automatic feeding device further includes a screw conveyor, which is connected between the discharge port of the weighing bin and the feed port of the mixing tank. The screw conveyor is configured to convey the lithium battery raw materials in the weighing bin to the mixing tank.

[0019] In some alternative embodiments, the first circulation dispersion system includes a first filtration component and a first demagnetizer. The first filtration component is disposed between the discharge port of the mixing tank and the homogenizing pump; the first demagnetizer is disposed between the homogenizing pump and the feed port of the mixing tank; wherein, the first filtration component includes at least two first filters arranged in parallel.

[0020] In some alternative embodiments, the second circulation dispersion system includes a first diaphragm pump assembly, a second demagnetizer and a heat exchanger connected in sequence; the first diaphragm pump assembly is disposed between the second demagnetizer and the discharge port of the mixing tank, and the heat exchanger is disposed between the second demagnetizer and the sand mill; wherein, the first diaphragm pump assembly includes at least two first diaphragm pumps arranged in parallel.

[0021] In some alternative embodiments, an output pipeline communicating with the second circulation dispersion system is further included. A second filtration component and a second diaphragm pump assembly are sequentially connected on the output pipeline; wherein, the second filtration component includes at least two second filters arranged in parallel, and the second diaphragm pump assembly includes at least two second diaphragm pumps arranged in parallel.

[0022] In some alternative embodiments, the discharge ports of the first mixing tank and the second mixing tank each include a first sub-discharge port and a second sub-discharge port that are spaced apart. The detection device includes a first detection device and a second detection device. The first detection device is disposed at the first sub-discharge port, and the second detection device is disposed at the second sub-discharge port. The first detection device is configured to detect the particle size of the lithium battery material at the first sub-discharge port, and the second detection device is configured to detect the particle size of the lithium battery material at the second sub-discharge port. When the lithium battery material particles detected by the first detection device at the first sub-discharge port and the lithium battery material particles detected by the second detection device at the second sub-discharge port both reach a first preset threshold, the controller controls the second circulation dispersion system to start, so as to disperse and grind the lithium battery material in the second circulation dispersion system until the particle values of the lithium battery material at the first sub-discharge port and the second sub-discharge port both reach a second preset threshold.

[0023] The embodiment of the present application provides an automated device for mixing powder slurries. The weighing bin and the solvent pipeline in the automatic feeding device are used to automatically transport a preset amount of lithium battery raw materials and solvents into the mixing tank respectively, and the mixing tank is used to stir and disperse the lithium battery raw materials and solvents to form lithium battery materials. Then, the lithium battery materials are transported through the discharge port of the mixing tank to the first circulation dispersion system, so as to cut the lithium battery material particles by a homogenizing pump. The lithium battery materials cut by the homogenizing pump then return to one of at least two mixing tanks, so as to further stir and disperse the lithium battery materials by the mixing tank. Then, the detection device is used to detect and obtain the particle value size of the lithium battery materials in the discharge port of the mixing tank. When the particle value is greater than the first preset threshold, the lithium battery materials in the mixing tank continue to enter the first circulation dispersion system for cutting. When the particle value is less than or equal to the first preset threshold, the lithium battery materials in the mixing tank enter the second circulation dispersion system through the discharge port, so as to continue grinding the lithium battery materials by a sand mill until the particle value size of the lithium battery materials is equal to or less than the second target preset threshold, then the lithium battery materials enter the next process, which improves the intelligence level of the automated device for mixing powder slurries. In addition, by detecting the particle value size of the lithium battery materials at the discharge port of the mixing tank, it is possible to accurately determine whether to enter the next process, thereby avoiding the problem of mistakenly entering the next process. In addition, a dry gas is transported into the weighing bin through the gas delivery unit to avoid the phenomenon of the lithium battery raw materials hanging on the wall due to high humidity in the weighing bin. In this way, the problem of low weighing accuracy caused by the previous hanging of the lithium battery raw materials on the wall can be avoided in the weighing bin. In addition, the present application does not require manual batching and weighing, which saves time and effort, thereby improving the batching efficiency, improving the weighing accuracy of the weighing bin, and thus improving the mixing ratio accuracy of the lithium battery materials.

[0024] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other technical problems that can be solved by the automatic device for stirring powder slurry provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manners. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 FIG. 1 is a schematic structural diagram of an automatic device for stirring powder slurry provided by an embodiment of the present application;

[0027] Figure 2 FIG. Figure 1 is a partial enlarged view of part A in FIG.

[0028] Reference numerals:

[0029] 100 - Automatic device for stirring powder slurry; 110 - Stirring tank;

[0030] 111 - First stirring tank; 112 - Second stirring tank;

[0031] 120 - Automatic feeding device; 121 - Weighing bin;

[0032] 122 - Weighing module; 123 - Sensor;

[0033] 124 - Solvent pipeline; 125 - Screw conveyor;

[0034] 140 - Homogenizing pump; 150 - Sand mill;

[0035] 160 - First filter; 161 - First demagnetizer;

[0036] 170 - First diaphragm pump; 171 - Second demagnetizer;

[0037] 172 - Heat exchanger; 180 - Output pipeline;

[0038] 181 - Second filter; 182 - Second diaphragm pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] With the development of industry, the rapid growth of energy consumption, and the increasingly serious pollution, PM2.5 has become a hot topic. More and more people begin to pay attention to the harm of air pollutants to health. Words such as "new energy vehicles" and "green transportation" have become the focus. Lithium iron phosphate has the advantages of being non-toxic, pollution-free, good safety performance, wide sources of raw materials, low price, and long life, and has become the ideal cathode material for the new generation of lithium-ion batteries. Slurry mixing, that is, stirring the raw materials and solvents of lithium iron phosphate in a blender, is a key process for preparing lithium battery materials. The quality of the slurry mixing has an important impact on the consistency, internal resistance, and coating and other processing performances of lithium batteries. However, in related technologies, the preparation of lithium battery materials usually requires manual batching and weighing, which has the technical problems of time-consuming, laborious, and low efficiency.

[0040] To solve the above problems, the present application provides an automated device for stirring powder slurries. The weighing bin and solvent pipeline in the automatic feeding device are used to automatically transport a preset amount of lithium battery raw materials and solvents into the stirring tank respectively, and the stirring tank is used to stir and disperse the lithium battery raw materials and solvents to form lithium battery materials. Then, the lithium battery materials are transported to the first circulation dispersion system through the discharge port of the stirring tank to cut the lithium battery material particles by a homogenizing pump. The lithium battery materials cut by the homogenizing pump then return to one of at least two stirring tanks to further stir and disperse the lithium battery materials through the stirring tank. Then, the size of the particle value of the lithium battery materials in the discharge port of the stirring tank is detected and obtained by a detection device. When the particle value is greater than the first preset threshold, the lithium battery materials in the stirring tank continue to enter the first circulation dispersion system for cutting. When the particle value is less than or equal to the first preset threshold, the lithium battery materials in the stirring tank enter the second circulation dispersion system through the discharge port to continue grinding the lithium battery materials by a sand mill until the size of the particle value of the lithium battery materials is equal to or less than the second target preset threshold, then the lithium battery materials enter the next process, which improves the intelligent level of the automated device for stirring powder slurries. In addition, by detecting the size of the particle value of the lithium battery materials at the discharge port of the stirring tank, it is possible to accurately determine whether to enter the next process, thus avoiding the problem of mistakenly entering the next process. In addition, dry gas is transported into the weighing bin through an air delivery unit to avoid the phenomenon of lithium battery raw materials sticking to the wall due to high humidity in the weighing bin. In this way, the problem of low weighing accuracy caused by the previous sticking of lithium battery raw materials to the wall in the weighing bin can be avoided. In addition, the present application does not require manual batching and weighing, which saves time and effort, can thus improve the batching efficiency, improve the weighing accuracy of the weighing bin, and thus improve the ratio accuracy of lithium battery materials.

[0041] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0042] Figure 1 It is a schematic structural diagram of an automatic device for stirring powder slurry provided by an embodiment of the present application; Figure 2 is Figure 1 a partial enlarged view of part A in

[0043] Please refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides an automatic device 100 for stirring powder slurry, including: a stirring device, an automatic feeding device 120, a homogenizing pump 140, a sand mill 150, and a controller; the stirring device includes at least two stirring tanks 110, the stirring tank 110 has a feeding port and an openable and closable discharging port, and the stirring tank 110 is configured to stir and disperse the lithium battery raw materials and solvents entering the stirring tank 110 to form lithium battery materials; the automatic feeding device 120 includes a weighing bin 121, a solvent pipeline 124, and a gas transmission unit (not shown in the figure), the weighing bin 121 is provided with a weighing module 122, the weighing bin 121 and the solvent pipeline 124 are respectively selectively communicated with the feeding port of the stirring tank 110, the weighing bin 121 is configured to convey lithium battery raw materials into the stirring tank 110; the solvent pipeline 124 is configured to convey solvents into the stirring tank 110; the weighing module 122 is configured to weigh the lithium battery raw materials in the weighing bin, the gas transmission unit has a gas transmission port located in the weighing bin, and the gas transmission port is configured to convey dry gas into the weighing bin; the homogenizing pump 140 is selectively communicated with the discharging port of the stirring tank 110 having lithium battery materials, and the outlet of the homogenizing pump 140 is communicated with one of the at least two stirring tanks 110 that do not have lithium battery materials to form a first circulation dispersion system, the sand mill 150 is selectively communicated with the discharging port of the stirring tank 110 having lithium battery materials, and the outlet of the sand mill 150 is communicated with one of the at least two stirring tanks 110 that do not have lithium battery materials to form a second circulation dispersion system; the controller is respectively signal-connected to the automatic feeding device 120, the stirring device, the homogenizing pump 140, and the sand mill 150.

[0044] It can be understood that the weighing module 122 on the weighing bin 121 can weigh in real time the amount of lithium battery raw materials conveyed to the mixing tank 110. For example, the weighing bin 121 can obtain the amount of lithium battery raw materials conveyed to the mixing tank 110 by means of weighing and reduction, so as to convey a preset amount of lithium battery raw materials to the mixing tank 110. The solvent pipeline 124 is used to convey a preset amount of solvent to the mixing tank 110. For example, in specific implementation, the solvent pipeline 124 first conveys a preset amount of solvent to the mixing tank 110, then sequentially weighs a preset amount of each lithium battery raw material through the weighing bin 121 and conveys it to the mixing tank 110, and then the solvent pipeline 124 continues to convey the solvent until the ratio of the amount of solvent conveyed to the mixing tank 110 to the amount of lithium battery raw materials conveyed matches. After that, the lithium battery raw materials and the solvent in the mixing tank 110 are stirred and dispersed by the mixing tank 110 to form lithium battery materials.

[0045] It should be noted that there are various lithium battery raw materials. For example, the lithium battery raw materials include various raw materials represented by A, B, C, etc. And the dosage of each raw material is different. Therefore, it is necessary to weigh the amount of each raw material separately. And there may be a phenomenon of wall hanging on the wall of the weighing bin due to high humidity in the weighing bin, which will affect the weighing accuracy of other lithium battery raw materials weighed by the weighing bin subsequently. Since the raw materials hanging on the wall of the weighing bin may enter the mixing tank together with the raw materials weighed next time, if the raw materials adhered to the wall of the weighing bin previously affect the accuracy of the raw materials weighed later. For example, the raw materials previously adhered to the wall of the weighing bin enter the mixing tank together with the subsequent raw materials. In this way, the ratio of various different raw materials in the lithium battery raw materials will be inaccurate. Therefore, in the present application, a gas transmission unit is provided to convey dry gas into the weighing bin to dry the air in the weighing bin through the dry gas. In addition, the dry gas can also dry the raw materials entering the weighing bin, avoiding the problem of wall hanging of the raw materials entering the weighing bin due to high humidity, thereby improving the weighing accuracy of each lithium battery raw material by the weighing bin.

[0046] In some embodiments, a detection device is provided at the discharge port of the mixing tank 110. The detection device is signal-connected to the controller. The detection device is configured to detect the particle size of the lithium battery material output from the discharge port. In this way, through the detection of the detection device, it can be determined whether the lithium battery material after being dispersed again by the mixing tank after being ground by the first cycle dispersion system enters the cycle dispersion system of the next process.

[0047] In some embodiments, the detection device is, for example, a sensor capable of detecting the pressure and flow rate at the discharge port of the mixing tank. Since the flow rate and pressure of the lithium battery material with different particle values will vary at the discharge port, after excluding the influence of other factors on the pressure and flow rate of the lithium battery material, the sensor transmits the detected pressure and flow rate at the discharge port of the mixing tank to the controller. The controller can compare with the values of the pressure and flow rate at the discharge port when the lithium battery material is at, for example, a first preset threshold, so as to determine whether the particle value of the lithium battery material in the mixing tank is less than or equal to, for example, the first preset threshold, thereby determining whether to enter the next process of dispersion and grinding.

[0048] It can be understood that by detecting the particle value of the lithium battery material at the discharge port of the mixing tank 110 by the detection device, it is possible to avoid the system from misjudging and entering the next process. Since the precision of the grinding particles in the next process is higher than that in the previous process, if the particle value has not reached, for example, the first preset threshold and enters the next process due to misjudgment, in this way, the large-particle lithium battery material will easily cause damage to the grinding equipment with higher precision, thereby shortening the service life of the grinding equipment. Therefore, in the present application, by detecting the particle value of the lithium battery material by the detection device, it is possible to accurately control whether the lithium battery material needs to enter the next process for dispersion and grinding, thereby extending the service life of the grinding equipment.

[0049] In some embodiments, multiple mixing tanks 110 can be provided in the mixing device as needed. In the embodiments of the present application, the mixing tank 110 is taken as an example including two for introduction.

[0050] Exemplarily, at least two mixing tanks include a first mixing tank 111 and a second mixing tank 112. The discharge port of the first mixing tank 111 can be selectively communicated with the homogenizing pump 140 and the sand mill 150 respectively. The outlets of the homogenizing pump 140 and the sand mill 150 are respectively communicated with the second mixing tank 112.

[0051] For example, the raw materials and solvents of the lithium battery are located in the first stirring tank 111. After the first stirring tank 111 stirs the raw materials and solvents of the lithium battery, a lithium battery material is formed. The lithium battery material is transported to the first circulation dispersion system through the discharge port of the first stirring tank 111, so as to cut the lithium battery material through the homogenizing pump 140 in the first circulation dispersion system, thereby achieving the purpose of reducing the particle value of the lithium battery material. The lithium battery material cut by the homogenizing pump 140 is transported to the second stirring tank 112, so as to further stir and disperse the lithium battery material through the second stirring tank 112. In this way, it is possible to avoid the mixing of the lithium battery material cut by the homogenizing pump 140 and the lithium battery material not cut by the homogenizing pump 140, so that all the lithium battery materials in the first stirring tank 111 can enter the homogenizing pump 140 for cutting, thereby improving the uniformity of the lithium battery material particles and avoiding the phenomenon that some lithium battery materials never enter the homogenizing pump 140 for cutting due to uneven stirring.

[0052] It can be seen that in the first circulation dispersion system, by cutting the lithium battery material in the first stirring tank 111 through the homogenizing pump 140 and transporting it to the second stirring tank 112, the lithium battery material can be inverted during the cutting cycle, thereby improving the uniformity of the particles of the lithium battery material. Furthermore, the stability and reliability of the lithium battery material are improved.

[0053] It should be noted that after the raw materials and solvents of the lithium battery are stirred and dispersed by the stirring tank 110, they first enter the first circulation dispersion system. After being cut by the homogenizing pump 140, they return to the stirring tank 110 again, so as to further stir and disperse the cut lithium battery material through the stirring tank 110. Then, the particle value of the lithium battery material at the discharge port of the stirring tank 110 is detected by the detection device. When the particle value of the lithium battery material is greater than the first preset threshold, the lithium battery material re-enters the first circulation dispersion system for cutting until the particle value of the lithium battery material at the discharge port of the stirring tank 110 is less than or equal to the first preset threshold; when the particle value of the lithium battery material is less than the first preset threshold, the lithium battery material output by the stirring tank 110 enters the second circulation dispersion system, so as to continue grinding the lithium battery material through the sand mill 150 to further reduce the particle value of the lithium battery material. The lithium battery material can be ground in the second circulation dispersion system once or multiple times until the particle value of the lithium battery material is less than or equal to the second preset threshold, and then enters the next process. Among them, the first preset threshold is greater than the second preset threshold.

[0054] In order to improve the detection accuracy of the detection device, in some embodiments, the discharge port of the mixing tank 110 includes a first sub-discharge port and a second sub-discharge port that are spaced apart. The detection device includes a first detection device and a second detection device. The first detection device is disposed at the first sub-discharge port, and the second detection device is disposed at the second sub-discharge port. The first detection device is configured to detect the particle size of the lithium battery material at the first sub-discharge port, and the second detection device is configured to detect the particle size of the lithium battery material at the second sub-discharge port. In this way, when the particles of the lithium battery material detected by the first detection device and the second detection device at their corresponding discharge ports are both smaller than the minimum grinding value of the circulating dispersion system in the previous process, the controller controls the valve of the circulating dispersion system in the previous process to close and opens the valve of the circulating dispersion system in the next process, so that the lithium battery material enters the circulating dispersion system in the next process for more refined grinding, thereby achieving the purpose of gradually reducing the particles of the lithium battery material.

[0055] In the above solution, after the weighing bin 121 and the solvent pipeline 124 in the automatic feeding device 120 respectively automatically transport a preset amount of lithium battery raw materials and solvents into the mixing tank 110, the controller controls the weighing bin 121 and the solvent pipeline 124 to stop transporting lithium battery raw materials and solvents into the mixing tank 110, and the mixing tank 110 stirs and disperses the lithium battery raw materials and solvents to form lithium battery materials. Then, the lithium battery materials are transported through the discharge port of the mixing tank 110 to the first circulating dispersion system to cut the lithium battery material particles by the homogenizing pump 140. The lithium battery materials cut by the homogenizing pump 140 then return to one of at least two mixing tanks 110 to further stir and disperse the lithium battery materials through the mixing tank 110; obtain the particle value of the lithium battery materials output from the discharge port of the mixing tank 110. When the particle value is greater than the first preset threshold, the mixing tank 110 is connected to the homogenizing pump 140 so that the lithium battery materials in the mixing tank 110 continue to enter the first circulating dispersion system for cutting; when the particle value is less than or equal to the first preset threshold, the mixing tank is connected to the sand mill 150 so that the lithium battery materials in the mixing tank 110 enter the second circulating dispersion system through the discharge port to continue grinding the lithium battery materials by the sand mill 150 until the particle value of the lithium battery materials is equal to or less than the second target preset threshold, then the lithium battery materials enter the next process, without manual batching and weighing, saving time and effort, thereby improving the batching efficiency; in addition, dry gas is transported into the weighing bin through the gas transmission unit to avoid the phenomenon of lithium battery raw materials sticking to the wall due to high humidity in the weighing bin. In this way, the problem of low subsequent weighing accuracy caused by the previous sticking of lithium battery raw materials to the wall in the weighing bin can be avoided, and the loss of lithium battery raw materials can also be reduced.

[0056] It can be understood that the raw materials and solvents of the lithium battery need to be stirred and mixed in a certain ratio. After a certain stirring and moving time, the lithium battery materials are homogenized and ground. When the materials are ground to the target particles, they can be pumped to the next process section.

[0057] Among them, in the lithium battery materials, the proportion of the lithium battery raw materials is, for example, 30% - 45% of the lithium battery materials, the pH value is, for example, 4 - 6, and the viscosity is, for example, 1200 - 3000 cp.

[0058] In some embodiments, the gas transmission unit includes a gas container for storing dry gas and a gas transmission pipeline communicated with the gas tank. The gas transmission port is arranged at one end of the gas transmission pipeline away from the gas container, and a valve is arranged at the gas transmission port. The valve is connected to the controller. In this way, when dry gas needs to be transmitted into the weighing bin, the controller controls the valve to open, so that the dry gas in the gas container is sprayed into the weighing bin through the gas transmission port of the gas transmission pipeline, so as to reduce the humidity of the air in the weighing bin and the humidity of the lithium battery raw materials, and avoid the lithium battery raw materials from adhering to the bin wall of the weighing bin due to excessive humidity, thereby improving the weighing accuracy of the weighing bin in the subsequent weighing process.

[0059] In some embodiments, a humidity detection component, such as a humidity sensor, is arranged in the weighing bin. The humidity detection component is in signal connection with the controller. The humidity detection component detects the humidity of the air in the weighing bin in real time and sends the detection result to the controller. The controller determines whether to open the valve at the gas transmission port according to the detection result of the humidity compared with the set value.

[0060] In addition, in order to further improve the weighing accuracy of the weighing bin each time, the automatic feeding device further includes a pulse backwashing unit (not shown in the figure). The pulse backwashing unit has a backwashing port located in the weighing bin. The pulse backwashing unit is in signal connection with the controller. The backwashing port is configured to spray high-pressure compressed gas towards the bin wall of the weighing bin, so as to blow the lithium battery raw materials on the bin wall of the weighing bin through the compressed gas. In this way, by the pulse backwashing unit blowing the bin wall of the weighing bin every time after weighing, the lithium battery raw materials are prevented from remaining on the bin wall of the weighing bin, thereby improving the weighing accuracy of the weighing bin, and at the same time ensuring the accuracy of the amount of lithium battery raw materials transported to the mixing tank each time by the weighing bin, and further improving the accuracy of the ratio of the lithium battery materials.

[0061] Exemplarily, the pulse backwashing unit includes a spray pipe, a pulse valve, a compression pump and a gas tank connected in sequence. The compression pump is configured to compress the gas in the gas tank and transmit it to the gas in the spray pipe. The backwashing port is arranged at the end of the spray pipe. The pulse valve is in signal connection with the controller. The controller controls the opening of the pulse valve, so that the gas compressed by the compression pump is blown to the bin wall of the weighing bin through the backwashing port.

[0062] In some embodiments, the automatic feeding device 120 further includes a flowmeter and a first control valve. For example, the flowmeter is disposed on the solvent pipeline 124, and the first control valve is disposed at the outlet of the solvent pipeline 124. The first control valve is controlled to control the opening and closing of the outlet of the solvent pipeline 124. The flowmeter and the control valve are respectively connected to the controller in a signal connection.

[0063] Specifically, when it is necessary to transport the solvent to the mixing tank 110, the amount of the solvent transported to the mixing tank 110 can be measured by the flowmeter. When the flow rate reaches the required flow rate of the user, the flowmeter feeds back the signal to the controller. The controller controls the first control valve disposed at the outlet of the solvent pipeline 124 according to the received signal to close the outlet of the solvent pipeline 124, so as to realize the automatic control of the amount of the solvent transported to the mixing tank 110. Correspondingly, a second control valve may also be disposed at the discharge port of the weighing bin 121, and the second control valve and the weighing module 122 are respectively connected to the controller in a signal connection. When the solvent pipeline 124 transports the solvent to the mixing tank 110, the weighing bin 121 transports the lithium battery raw materials to the mixing tank 110. For example, the lithium battery raw materials are lithium iron phosphate raw materials, etc., and the weighing module 122 measures the lithium battery raw materials transported to the mixing tank 110. When the demand for the lithium battery raw materials is reached, the weighing module 122 sends a signal to the controller, and the controller controls the second control valve at the discharge port of the weighing bin 121 to close according to this signal to end the feeding of the lithium battery raw materials. Thus, it can be seen that in the above solution, it is possible to automatically transport the lithium battery raw materials and the solvent to the mixing tank 110 without manual batching, which saves time and effort and thus can improve the batching efficiency.

[0064] In some embodiments, the weighing module 122 is, for example, a weighing scale. Weighing brackets are disposed on opposite sides of the outer side wall of the weighing bin, and the weighing scale is located at the bottom of the weighing brackets. In this way, the weighing bin is weighed by the weighing scale. When the lithium battery raw materials are transported into the mixing tank 110 through the weighing bin, the amount of the lithium battery raw materials transported to the mixing tank 110 can be determined by the way of weight reduction measurement. In addition, a sensor 123 may be disposed at the bottom of the weighing module 122, and the weighing module 122 is connected to the controller through the sensor 123. In this way, when the lithium battery raw materials in the weighing bin 121 are transported to the mixing tank 110, the gravity of the lithium battery raw materials is converted into a corresponding signal through the sensor and fed back to the controller, so that the controller determines whether to close the second control valve at the discharge port of the weighing bin according to the amount detected by the weighing module. In addition, by disposing the weighing module on the outer wall of the weighing bin 121, the pollution of the weighing bin 121 by the lithium battery raw materials can be avoided, thereby avoiding affecting the weighing accuracy of the weighing module 122.

[0065] In some embodiments, the automatic feeding device 120 further includes a screw conveyor 125. The screw conveyor 125 is connected between the weighing bin 121 and the feeding port of the mixing tank 110. The screw conveyor 125 is configured to convey the lithium battery raw materials in the weighing bin 121 to the mixing tank 110. That is, the lithium battery materials in the weighing bin 121 can be evenly fed into the mixing tank 110 through the screw conveyor 125. Among them, the structure and principle of the screw conveyor can refer to the related art and will not be elaborated here.

[0066] In other embodiments, no second control valve is provided at the discharge port of the weighing bin 121, and a second control valve is provided at the outlet of the screw conveyor 125. In this way, when the lithium battery raw materials conveyed to the mixing tank 110 reach the set value of the weighing module 122, the weighing module 122 sends a feedback signal to the controller, and the controller controls the second control valve to close according to the feedback signal, and the mixing tank 110 starts to mix and disperse.

[0067] It can be understood that a mixing impeller is provided in the mixing tank 110. The mixing impeller rotates to mix and disperse the lithium battery raw materials and the solvent, so that the lithium battery raw materials and the solvent are fully mixed to form lithium battery materials.

[0068] In some embodiments, please continue to refer to Figure 1 As shown, the first circulation dispersion system includes a first filtration component and a first demagnetizer 161. The first filtration component is arranged between the discharge port of the mixing tank 110 and the homogenizing pump 140; the first demagnetizer 161 is arranged between the homogenizing pump 140 and the feeding port of the mixing tank 110; among them, the first filtration component includes at least two first filters 160 arranged in parallel.

[0069] Among them, the first filtration component is used to filter impurities in the lithium battery materials. At least two first filters 160 are arranged in parallel in the first filtration component. For example, the first filtration component includes two first filters 160 arranged in parallel. During the filtration process, one first filter 160 is used to filter impurities in the lithium battery materials, and the other first filter 160 is used as a backup to prevent one of the first filters 160 from being damaged and unable to filter impurities in the lithium battery materials, thereby improving the reliability of filtering the lithium battery materials.

[0070] The first demagnetizer 161 is used to remove magnetic impurities in the lithium battery materials, so as to further improve the purity of the lithium battery materials through the first demagnetizer 161, thereby improving the reliability of the lithium battery.

[0071] In some embodiments, the second circulation dispersion system includes a first diaphragm pump 170 assembly, a second demagnetizer 171, and a heat exchanger 172 that are connected in sequence; the first diaphragm pump 170 assembly is disposed between the second demagnetizer 171 and the discharge port of the stirring tank 110, and the heat exchanger 172 is disposed between the second demagnetizer 171 and the sand mill 150; wherein, the first diaphragm pump 170 assembly includes at least two first diaphragm pumps 170 arranged in parallel.

[0072] It can be understood that at least two first diaphragm pumps 170 arranged in parallel in the first diaphragm pump 170 assembly are used to provide power to the second circulation dispersion system to increase the power of the lithium battery material flowing towards the sand mill 150. For example, the first diaphragm pump 170 assembly includes two first diaphragm pumps 170 arranged in parallel, wherein one of the two first diaphragm pumps 170 serves as a backup to prevent the other first diaphragm pump 170 from being damaged; in addition, the first diaphragm pump 170 may further include a filter screen to further filter impurities in the lithium battery material.

[0073] The second demagnetizer 171 can further remove magnetic impurities in the lithium battery material, and the heat exchanger 172 is used to cool the lithium battery material to prevent the lithium battery material from deteriorating due to excessive temperature. Then, the cooled lithium battery material is ground by the sand mill 150, and after grinding, it returns to the stirring tank 110 for stirring and dispersion. The lithium battery material continuously circulates, grinds, stirs, and disperses in the second circulation dispersion system until the particle value of the lithium battery material output from the discharge port of the stirring tank 110 is less than or equal to the second preset threshold, and then the lithium battery material enters the next process.

[0074] In some embodiments, please continue to refer to Figure 1 As shown, the automatic device 100 for powder slurry stirring further includes an output pipeline 180 communicated with the second circulation dispersion system. When the particle value of the lithium battery material output from the discharge port of the stirring tank 110 is less than or equal to the second preset threshold, the lithium battery material enters the output pipeline 180. A second filter assembly and a second diaphragm pump 182 assembly are sequentially connected on the output pipeline 180; wherein, the second filter assembly includes at least two second filters 181 arranged in parallel, and the second diaphragm pump 182 assembly includes at least two second diaphragm pumps 182 arranged in parallel to further filter impurities in the lithium battery material through the second filters 181 in the second filter assembly, and then provide power to the lithium battery material in the output pipeline 180 through the second diaphragm pumps 182 in the second diaphragm pump 182 assembly to convey the lithium battery material to the next process.

[0075] It can be understood that the second filtering component includes at least two second filters 181 arranged in parallel. Among them, one of the at least two second filters 181 arranged in parallel is used to filter impurities in the lithium battery material, and the other second filters 181 are used as spares. Exemplarily, the second filter 181 component includes two second filters 181, that is, one second filter 181 is used to filter impurities in the lithium battery material, and the other second filter 181 is used as a spare to prevent the second filter 181 from being damaged.

[0076] Similarly, the second diaphragm pump 182 component includes at least two second diaphragm pumps 182 arranged in parallel. Among them, one of the at least two second diaphragm pumps 182 arranged in parallel is used to provide power to the lithium battery material, and the other second diaphragm pumps 182 are used as spares. Exemplarily, the second diaphragm pump 182 component includes two second diaphragm pumps 182, that is, one second diaphragm pump 182 is used to provide power to the lithium battery material, and the other second diaphragm pump 182 is used as a spare to prevent the second diaphragm pump 182 that provides power to the lithium battery material from being damaged.

[0077] In the above solution, a preset amount of lithium battery raw materials and solvents are automatically transported into the mixing tank through the weighing bin and the solvent pipeline in the automatic feeding device respectively, and the lithium battery raw materials and solvents are stirred and dispersed by the mixing tank to form lithium battery materials. Then, the lithium battery materials are transported to the first circulation dispersion system through the discharge port of the mixing tank, so as to cut the lithium battery material particles by the homogenizing pump. The lithium battery materials cut by the homogenizing pump then return to one of the at least two mixing tanks to be further stirred and dispersed by the mixing tank. Then, the particle value of the lithium battery materials in the discharge port of the mixing tank is detected and obtained by the detection device. When the particle value is greater than the first preset threshold, the lithium battery materials in the mixing tank continue to enter the first circulation dispersion system for cutting. When the particle value is less than or equal to the first preset threshold, the lithium battery materials in the mixing tank enter the second circulation dispersion system through the discharge port to continue grinding the lithium battery materials by the sand mill until the particle value of the lithium battery materials is equal to or less than the second target preset threshold, then the lithium battery materials enter the next process, which improves the intelligence level of the automatic device for mixing powder slurries. In addition, by detecting the particle value of the lithium battery materials at the discharge port of the mixing tank, it is possible to accurately determine whether to enter the next process, thus avoiding the problem of mistakenly entering the next process. In addition, dry gas is transported into the weighing bin through the gas transmission unit to avoid the phenomenon of the lithium battery raw materials hanging on the wall due to high humidity in the weighing bin. In this way, the problem of low weighing accuracy in the subsequent weighing caused by the previous hanging of the lithium battery raw materials on the wall can be avoided in the weighing bin. In addition, this application does not require manual batching and weighing, which saves time and effort, thus improving the batching efficiency, improving the weighing accuracy of the weighing bin, and thus improving the proportioning accuracy of the lithium battery materials.

[0078] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0079] In the description of this specification, the descriptions with reference to terms such as "one implementation manner", "some implementation manners", "illustrative implementation manner", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An automated device for stirring powder slurry, characterized in that: include: A stirring device, comprising at least two stirring tanks, wherein the at least two stirring tanks include a first stirring tank and a second stirring tank, wherein the first stirring tank and the second stirring tank both have a feed inlet and an openable and closable discharge port, and the first stirring tank and the second stirring tank are respectively configured to stir and disperse the lithium battery raw material and the solvent entering therein to form a lithium battery material; The automatic feeding device comprises a weighing bin, a solvent pipeline and a gas delivery unit, wherein the weighing bin is provided with a weighing module, the weighing bin and the solvent pipeline are selectively connected to the feed port of one of the first stirring tank and the second stirring tank, respectively, the weighing bin is configured to deliver lithium battery raw materials to the stirring tank corresponding thereto; the solvent pipeline is configured to deliver solvent to the stirring tank corresponding thereto; the weighing module is configured to weigh the lithium battery raw materials in the weighing bin, and the gas delivery unit has a gas delivery port located in the weighing bin, and the gas delivery port is configured to deliver dry gas to the weighing bin; A homogenizing pump, which can be selectively connected to the discharge port of the first stirring tank and the second stirring tank containing the lithium battery material, and the outlet of the homogenizing pump is connected to the feed port of the first stirring tank and the second stirring tank not containing the lithium battery material, so as to form a first circulation dispersion system; A sand mill can be selectively connected to the discharge port of the first stirring tank and the second stirring tank containing the lithium battery material, and the outlet of the sand mill is connected to the feed port of one of the first stirring tank and the second stirring tank that does not contain the lithium battery material, so as to form a second circulation dispersion system; A controller, respectively connected to the automatic feeding device, the stirring device, the homogenizing pump, the sand mill and the gas transmission unit by signals; The discharge ports of the first stirring tank and the second stirring tank are both provided with detection devices, the detection devices are connected to the controller signal, and the detection devices are configured to detect the particle size of the lithium battery material output from the discharge port.

2. The automatic device for stirring powder slurry according to claim 1, characterized in that: A humidity detection component is arranged in the weighing bin and is connected to the controller signal. The humidity detection component is configured to detect the humidity in the weighing bin.

3. The automatic device for stirring powder slurry according to claim 2, characterized in that: The automatic feeding device also includes a pulse backflush unit, which has a backflush port located in the weighing bin. The pulse backflush unit is connected to the controller signal, and the backflush port is configured to spray compressed gas toward the weighing bin to purge the lithium battery raw materials on the wall of the weighing bin.

4. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: It also includes a flow meter and a first control valve, wherein the flow meter is arranged on the solvent pipeline, the first control valve is arranged at the outlet of the solvent pipeline, the first control valve is configured to control the opening and closing of the outlet of the solvent pipeline, and the flow meter and the first control valve are respectively connected to the controller signal.

5. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: Weighing brackets are arranged on opposite sides of the outer wall of the weighing bin, the weighing module is located at the bottom of the weighing brackets, the discharge port of the weighing bin is provided with a second control valve, the weighing module is provided with a gravity sensor, the gravity sensor and the second control valve are respectively connected to the controller signal, and the second control valve is configured to selectively open and close the discharge port of the weighing bin.

6. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: The automatic feeding device also includes a screw conveyor, which is connected between the weighing bin and the feed port of the stirring tank, and the screw conveyor is configured to convey the lithium battery raw material in the weighing bin to the stirring tank.

7. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: The first circulation and dispersion system includes a first filter component and a first demagnetizer, the first filter component is arranged between the discharge port of the stirring tank and the homogenizing pump; the first demagnetizer is arranged between the homogenizing pump and the feed port of the stirring tank; wherein the first filter component includes at least two first filters arranged in parallel.

8. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: The second circulation and dispersion system includes a first diaphragm pump assembly, a second demagnetizer and a heat exchanger which are connected in sequence; the first diaphragm pump assembly is arranged between the second demagnetizer and the discharge port of the stirring tank, and the heat exchanger is arranged between the second demagnetizer and the sand mill; wherein the first diaphragm pump assembly includes at least two first diaphragm pumps arranged in parallel.

9. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: It also includes an output pipeline connected to the second circulation and dispersion system, and the output pipeline is provided with a second filter component and a second diaphragm pump component connected in sequence; wherein the second filter component includes at least two second filters arranged in parallel, and the second diaphragm pump component includes at least two second diaphragm pumps arranged in parallel.

10. The automatic device for stirring powder slurry according to any one of claims 1 to 3, characterized in that: The discharge ports of the first stirring tank and the second stirring tank both include a first sub-discharge port and a second sub-discharge port that are spaced apart, and the detection device includes a first detection device and a second detection device, the first detection device is disposed at the first sub-discharge port, and the second detection device is disposed at the second sub-discharge port, the first detection device is configured to detect the particle size of the lithium battery material at the first sub-discharge port, and the second detection device is configured to detect the particle size of the lithium battery material at the second sub-discharge port, and when the first detection device detects that the particles of the lithium battery material at the first sub-discharge port and the second detection device detects that the particles of the lithium battery material at the second sub-discharge port both reach a first preset threshold, the controller controls the second circulation dispersion system to start, so as to disperse and grind the lithium battery material in the second circulation dispersion system, until the particle values ​​of the lithium battery material at the first sub-discharge port and the second sub-discharge port both reach a second preset threshold.

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