Dispersing agent processing technology for lithium battery positive electrode slurry

Abstract

The invention discloses a dispersant processing technology for lithium battery positive electrode slurry, and belongs to the field of dispersants.The device comprises a grinding cylinder, a grinding assembly is arranged in the grinding cylinder, a solution box is arranged below the grinding cylinder, an organic solvent is poured into the solution box, and a ventilation assembly is further arranged in the solution box; a heating assembly is arranged below the solution box; the grinding assembly comprises a grinding cylinder, and a supporting mechanism is arranged below the grinding cylinder. When the device is used, nitrogen dioxide gas and sulfur dioxide gas are injected into the inflation bag through the two air machines respectively, acid liquor can be rapidly produced by solutions to serve as oxidizing substances, and the solutions penetrate through the heating coil to be heated after being mixed.

Description

Technical Field

[0001] The invention relates to the field of dispersants, and in particular to a dispersant processing technology for lithium battery positive electrode slurry. Background Art

[0002] With the development of industrial technology, modern dispersant technology has become more and more perfect. The density of dispersant and material should be close and no chemical reaction should occur. There are many types of positive electrode slurry for lithium battery. Dispersants for positive electrode slurry of lithium battery need to be equipped with various types. The viscosity of dispersant in the past was relatively fixed. Dispersant with one viscosity was difficult to be used for multiple materials.

[0003] Secondly, the structure of previous dispersant manufacturing equipment is relatively complex, and the manufacturing equipment is difficult to maintain. The dispersant needs to be heated during the manufacturing process. The stability of previous equipment during the heating process is relatively poor and it is easy to overheat. Summary of the invention

[0004] The purpose of the present invention is to provide a dispersant processing technology for lithium battery positive electrode slurry. When the device is in use, two air machines inject nitrogen dioxide and sulfur dioxide gas into the inflatable bag respectively. When the gas goes out from the needle hole on the side wall of the inflatable bag, tiny bubbles can be formed. A large number of tiny bubbles increase the reaction speed with the liquid, and the solution can quickly produce acid to act as an oxidizing substance. After the solution is mixed, it passes through a heating coil for heating, and then dispersants of different viscosities can be produced to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a dispersant processing technology for lithium battery positive electrode slurry, comprising the following steps:

[0006] S1. Prepare 100 parts of organic solvent according to mass calculation, put 100 parts of organic solvent into the reaction box, the organic solvent is a mixture of styrene and perchloroethylene, and heat the organic solvent to 40 degrees Celsius;

[0007] S2. When the organic solvent is mixed, an acidic gas is introduced, wherein the acidic gas is nitrogen dioxide and sulfur dioxide, and then 1 part of vinyl ether and 3 parts of polyacrylic acid auxiliary agent are added;

[0008] S3. After adding the auxiliary agent, the material temperature is raised to 140 degrees Celsius and the heating time is four minutes.

[0009] A device for processing a dispersant for lithium battery positive electrode slurry, comprising a grinding cylinder, a grinding assembly is arranged inside the grinding cylinder, a solution box is arranged below the grinding cylinder, an organic solvent is perfused inside the solution box, a ventilation assembly is also arranged inside the solution box, and a heating assembly is arranged below the solution box; the grinding assembly comprises a grinding cylinder, a supporting mechanism is arranged below the grinding cylinder, the supporting mechanism comprises a bracket bridge on the front and rear side walls of the grinding cylinder, a base plate is arranged at the bottom end of the bracket bridge, and the base plate is fixedly connected to a building; a feeding port is arranged at the top end of the grinding cylinder, and the A grinding channel is arranged in the middle of the grinding cylinder, a grinding liner is rotatably arranged inside the grinding channel, a baffle is arranged at the port of the grinding channel, a grinding motor is arranged on the side wall of the baffle, the grinding liner is connected to the output shaft of the grinding motor, a material output mechanism is arranged at the bottom of the grinding channel, the material output mechanism includes a belt groove at the bottom of the grinding channel, a group of shaft plates are arranged at the left and right ends of the grinding cylinder, a roller is rotatably arranged in the middle of the shaft plate, the two rollers are connected by a discharge belt, one of the rollers is installed on the output end of the stepper motor, and the discharge belt passes through the middle of the belt groove.

[0010] Furthermore, the feed port includes four feed ports at the top of the grinding cylinder, the rightmost feed port is detachably provided with a bell mouth, a plunger is inserted into the other three feed ports, and the bottom end of the feed port extends into the grinding channel.

[0011] Furthermore, an arc groove matching the grinding channel is arranged on the side wall of the discharging belt, and the diameter of the arc groove is the same as the diameter of the grinding channel.

[0012] Furthermore, the ventilation component includes an inflatable bag inside the solution tank, and exhaust pinholes are provided on the inner and outer side walls of the inflatable bag. Two air machines are provided on the outer wall of the solution tank, and an surround pipe is provided at the output end of the air machine. The surround pipe is connected to the inside of the inflatable bag, and the input ends of the two air machines are respectively connected to the gas containing boxes of nitrogen dioxide and sulfur dioxide. A stirring component is also provided in the middle of the solution tank.

[0013] Furthermore, the stirring assembly includes a stirring impeller rotatably arranged at the bottom of the solution tank, the stirring impeller is located inside the air-filled bag, the stirring impeller is installed on the output end of the stirring motor, and the stirring motor is fixed at the bottom of the solution tank.

[0014] Furthermore, the heating assembly includes a sealed heating box below the solution tank, a heating liquid is arranged inside the sealed heating box, a heating coil is arranged inside the sealed heating box, a liquid outlet nozzle is arranged at the liquid outlet end of the heating coil, the liquid inlet end of the heating coil is connected to the slurry pump, and the liquid suction end of the slurry pump is inserted into the interior of the solution tank.

[0015] Furthermore, the sealed heating box is provided with two pipe penetration openings, and the two ends of the heating coil pass through the two pipe penetration openings respectively, and the pipe walls at the two ends of the heating coil are tightly connected to the pipe penetration openings.

[0016] In summary, due to the adoption of the above technology, the beneficial effects of the present invention are:

[0017] First, nitrogen dioxide and sulfur dioxide gases are introduced into the dispersant to generate an oxidizing acid solution, and then the powder is heated and decomposed.

[0018] Secondly, the grinding motor drives the grinding inner tank to rotate for grinding operations. At the same time, the stepper motor drives the discharge belt through the roller. The powder in the gap between the grinding inner tank and the grinding channel will be pushed out from the discharge belt, achieving the effect of processing powder lumps.

[0019] Third, two air machines inject nitrogen dioxide and sulfur dioxide gas into the inflatable bag respectively. When the gas goes out from the pinhole on the side wall of the inflatable bag, tiny bubbles are formed. A large number of tiny bubbles increase the reaction speed with the liquid, and the solution can quickly produce acid to act as an oxidizing substance. After the solution is mixed, it passes through the heating coil for heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram showing a front view of a dispersant processing process for lithium battery positive electrode slurry.

[0021] Figure 2 A schematic diagram showing a side view of a dispersant processing process for lithium battery positive electrode slurry.

[0022] Figure 3 A schematic diagram of a grinding cylinder for a dispersant processing process for lithium battery positive electrode slurry.

[0023] Figure 4 A schematic diagram of a side view of a grinding cylinder for a dispersant processing process for lithium battery positive electrode slurry.

[0024] Figure 5 It is a schematic diagram of a cross-section of a grinding cylinder for a dispersant processing process for lithium battery positive electrode slurry.

[0025] Figure 6 A schematic diagram of a grinding channel for a dispersant processing process for lithium battery positive electrode slurry.

[0026] Figure 7 A schematic diagram of a dispersant processing solution box for lithium battery positive electrode slurry.

[0027] Figure 8 A schematic diagram of a heating box for a dispersant processing process for lithium battery positive electrode slurry.

[0028] Description of reference numerals:

[0029] Grinding cylinder 1, support bridge 101, base plate 102, feed port 103, bell mouth 104, grinding liner 105, shaft plate 106, roller 107, discharge belt 108, stepper motor 109, grinding motor 110, grinding channel 111, belt groove 112, baffle 113, solution tank 2, air machine 201, stirring motor 202, inflatable bag 203, surround tube 204, stirring impeller 205, sealed heating box 3, heating coil 301, liquid outlet nozzle 302, slurry pump 4. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] The present invention provides Figure 1-Figure 8 A dispersant processing process for lithium battery positive electrode slurry shown includes the following steps:

[0032] S1. Prepare 100 parts of organic solvent according to mass calculation, put 100 parts of organic solvent into the reaction box, the organic solvent is a mixture of styrene and perchloroethylene, and heat the organic solvent to 40 degrees Celsius;

[0033] S2. When the organic solvent is mixed, an acidic gas is introduced, wherein the acidic gas is nitrogen dioxide and sulfur dioxide, and then 1 part of vinyl ether and 3 parts of polyacrylic acid auxiliary agent are added;

[0034] S3. After adding the auxiliary agent, the material temperature is raised to 140 degrees Celsius and the heating time is four minutes.

[0035] A device for processing a dispersant for positive electrode slurry of a lithium battery, comprising a grinding cylinder 1, wherein a grinding assembly is arranged inside the grinding cylinder 1, a solution tank 2 is arranged below the grinding cylinder 1, an organic solvent is perfused inside the solution tank 2, a ventilation assembly is also arranged inside the solution tank 2, and a heating assembly is arranged below the solution tank 2; the grinding assembly comprises a grinding cylinder 1, a supporting mechanism is arranged below the grinding cylinder 1, the supporting mechanism comprises a bracket bridge 101 on the front and rear side walls of the grinding cylinder 1, a base plate 102 is arranged at the bottom end of the bracket bridge 101, and the base plate 102 is fixedly connected to a building; a feeding port is arranged at the top of the grinding cylinder 1, a grinding channel 111 is arranged in the middle of the grinding cylinder 1, a grinding liner 105 is rotatably arranged inside the grinding channel 111, a baffle 113 is arranged at the port of the grinding channel 111, and a side wall of the baffle 113 is provided with The grinding motor 110 and the grinding liner 105 are connected to the output shaft of the grinding motor 110. A material output mechanism is arranged at the bottom of the grinding channel 111. The material output mechanism includes a belt groove 112 at the bottom of the grinding channel 111. A group of shaft plates 106 are arranged at the left and right ends of the grinding cylinder 1. A roller 107 is arranged in the middle of the shaft plate 106 for rotation. The two rollers 107 are connected by a discharge belt 108. One of the rollers 107 is installed on the output end of the stepper motor 109. The discharge belt 108 passes through the middle of the belt groove 112. After the powder enters the grinding channel 111, the grinding motor 110 drives the grinding liner 105 to rotate for grinding. At the same time, the stepper motor 109 drives the discharge belt 108 to operate through the roller 107, and the powder in the gap between the grinding liner 105 and the grinding channel 111 will be pushed out from the discharge belt 108.

[0036] The feeding port includes four feeding ports 103 at the top of the grinding cylinder 1, and the rightmost feeding port 103 is detachably provided with a bell mouth 104. A plunger is inserted into the other three feeding ports 103. The bottom end of the feeding port 103 extends into the grinding channel 111. The bell mouth 104 can be loaded into other feeding ports 103, and the farther the bell mouth 104 is from the grinding channel 111.

[0037] The side wall of the discharging belt 108 is provided with an arc groove matching the grinding channel 111, and the diameter of the arc groove is the same as the diameter of the grinding channel 111. The arc groove on the discharging belt 108 can be attached to the grinding liner 105. The discharging belt 108 is replaceable when it is worn to a certain extent.

[0038] The ventilation component includes an inflatable bag 203 inside the solution tank 2, and exhaust pinholes are provided on the inner and outer side walls of the inflatable bag 203. Two air machines 201 are provided on the outer side wall of the solution tank 2. The output end of the air machine 201 is provided with a surrounding tube 204, and the surrounding tube 204 is connected to the inside of the inflatable bag 203. The input ends of the two air machines 201 are respectively connected to the gas containing boxes of nitrogen dioxide and sulfur dioxide. A stirring component is also provided in the middle of the solution tank 2. The powder after grinding falls into the solution tank 2. The two air machines 201 inject nitrogen dioxide and sulfur dioxide gas into the inflatable bag 203 respectively. When the gas goes out from the pinholes on the side wall of the inflatable bag 203, tiny bubbles can be formed. A large number of tiny bubbles increase the reaction speed with the liquid, and the solution can quickly produce acid to act as an oxidant.

[0039] The stirring assembly includes a stirring impeller 205 rotatably arranged at the bottom of the solution tank 2. The stirring impeller 205 is located inside the air-filled bag 203. The stirring impeller 205 is installed on the output end of the stirring motor 202. The stirring motor 202 is fixed at the bottom of the solution tank 2. The stirring impeller 205 can increase the contact amount between bubbles and liquid during rotation, thereby improving the reaction speed of gas and liquid.

[0040] The heating component includes a sealed heating box 3 below the solution tank 2, a heating liquid is arranged inside the sealed heating box 3, a heating coil 301 is arranged inside the sealed heating box 3, a liquid outlet nozzle 302 is arranged at the liquid outlet end of the heating coil 301, the liquid inlet end of the heating coil 301 is connected to the slurry pump 4, the liquid suction end of the slurry pump 4 is inserted into the interior of the solution tank 2, and after the solution is mixed, it passes through the heating disk 301 tube for heating. The enclosed space of the sealed heating box 3 can heat the water to one hundred and forty degrees Celsius.

[0041] The sealed heating box 3 is provided with two pipe penetration openings, and the two ends of the heating coil 301 pass through the two pipe penetration openings respectively, and the pipe walls at both ends of the heating coil 301 are tightly connected to the pipe penetration openings. The tightly connected pipe walls and the pipe penetration openings of the heating coil 301 can prevent air leakage, and the positions of the pipe penetration openings are regularly checked for air leakage.

[0042] Working principle: This dispersant with convenient viscosity adjustment can be applied to lithium batteries of various models. The grinding motor 110 drives the grinding liner 105 to rotate and grind the powder. At the same time, the stepper motor 109 drives the discharge belt 108 to operate through the roller 107. The bell mouth 104 can be loaded into other feed ports 103. The farther the bell mouth 104 is from the grinding channel 111, the arc groove on the discharge belt 108 can fit onto the grinding liner 105. When the discharge belt 108 is worn to a certain extent, it needs to be replaced. Two air machines 201 inject nitrogen dioxide and sulfur dioxide into the inflatable bag 203 respectively. Gas, when the gas goes out from the needle hole on the side wall of the inflatable bag 203, tiny bubbles can be formed. A large number of tiny bubbles increase the reaction speed with the liquid, and the solution can quickly produce acid to act as an oxidant. The stirring impeller 205 can increase the contact amount between the bubbles and the liquid during the rotation process, thereby improving the reaction speed of the gas and the liquid. After the solution is mixed, it passes through the heating plate 301 tube for heating. The enclosed space of the sealed heating box 3 can heat the water to one hundred and forty degrees Celsius. The tube wall of the heating coil 301 and the pipe opening are tightly connected to prevent air leakage, and the position of the pipe opening is regularly checked for air leakage.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A dispersant processing technology for lithium battery positive electrode slurry, characterized in that: The following steps are involved: S1. According to the weight of the machine, prepare 50-100 parts of an organic solvent, 1-2 parts of vinyl ether and 3-5 parts of polyacrylic acid, and put the organic solvent into the reaction box. The organic solvent is a mixture of styrene and perchloroethylene in a mass ratio of 1:3-1:5, and the organic solvent is heated to forty degrees Celsius; S2. When the organic solvent is mixed, an acidic gas is introduced, wherein nitrogen dioxide and sulfur dioxide are selected as the acidic gas, and then vinyl ether and polyacrylic acid are added; S3. After adding vinyl ether and polyacrylic acid, the material temperature is raised to 140 degrees Celsius for four minutes.

2. A device for processing a dispersant for lithium battery positive electrode slurry, characterized in that: It comprises a grinding cylinder (1), a grinding assembly is arranged inside the grinding cylinder (1), a solution box (2) is arranged below the grinding cylinder (1), an organic solvent is poured into the solution box (2), a ventilation assembly is also arranged inside the solution box (2), and a heating assembly is arranged below the solution box (2); The grinding assembly comprises a grinding cylinder (1), a supporting mechanism is arranged below the grinding cylinder (1), the supporting mechanism comprises a support bridge (101) on the front and rear side walls of the grinding cylinder (1), a base plate (102) is arranged at the bottom end of the support bridge (101), and the base plate (102) is fixedly connected to the building; The top of the grinding cylinder (1) is provided with a feeding port, the middle of the grinding cylinder (1) is provided with a grinding channel (111), a grinding liner (105) is rotatably provided inside the grinding channel (111), a baffle (113) is provided at the end of the grinding channel (111), a grinding motor (110) is provided on the side wall of the baffle (113), the grinding liner (105) is connected to the output shaft of the grinding motor (110), and a material is provided at the bottom of the grinding channel (111). A material output mechanism, the material output mechanism comprises a belt groove (112) at the bottom of the grinding channel (111), a group of shaft plates (106) are arranged at the left and right ends of the grinding cylinder (1), a roller (107) is rotatably arranged in the middle of the shaft plate (106), and the two rollers (107) are connected by a discharge belt (108), one of the rollers (107) is installed on the output end of the stepping motor (109), and the discharge belt (108) passes through the middle of the belt groove (112).

3. The equipment for the dispersant processing technology for lithium battery positive electrode slurry according to claim 2, characterized in that: The feed port comprises four feed ports (103) at the top of the grinding cylinder (1), the rightmost feed port (103) being detachably provided with a bell mouth (104), a plunger being inserted into the other three feed ports (103), and the bottom end of the feed port (103) extending into the interior of the grinding channel (111).

4. The equipment for the dispersant processing technology for lithium battery positive electrode slurry according to claim 2, characterized in that: An arc groove matching the grinding channel (111) is arranged on the side wall of the discharging belt (108), and the diameter of the arc groove is the same as the diameter of the grinding channel (111).

5. The equipment for the dispersant processing technology for lithium battery positive electrode slurry according to claim 2, characterized in that: The ventilation component comprises an inflatable bag (203) inside a solution tank (2), exhaust pinholes are arranged on the inner and outer side walls of the inflatable bag (203), two air machines (201) are arranged on the outer side wall of the solution tank (2), an surround pipe (204) is arranged at the output end of the air machine (201), the surround pipe (204) is connected to the inside of the inflatable bag (203), the input ends of the two air machines (201) are respectively connected to the gas containing boxes of nitrogen dioxide and sulfur dioxide, and a stirring component is also arranged in the middle of the solution tank (2).

6. The equipment for the dispersant processing technology for lithium battery positive electrode slurry according to claim 5, characterized in that: The stirring assembly comprises a stirring impeller (205) rotatably arranged at the bottom of the solution tank (2); the stirring impeller (205) is located inside the air-filled bag (203); the stirring impeller (205) is installed on the output end of the stirring motor (202); and the stirring motor (202) is fixed at the bottom of the solution tank (2).

7. The equipment for dispersant processing technology for lithium battery positive electrode slurry according to claim 2, characterized in that: The heating component comprises a sealed heating box (3) below the solution box (2), a heating liquid is arranged inside the sealed heating box (3), a heating coil (301) is arranged inside the sealed heating box (3), a liquid outlet end of the heating coil (301) is provided with a liquid outlet nozzle (302), a liquid inlet end of the heating coil (301) is connected to a slurry pump (4), and a liquid suction end of the slurry pump (4) is inserted into the interior of the solution box (2).

8. The equipment for the dispersant processing technology for lithium battery positive electrode slurry according to claim 7, characterized in that: The sealed heating box (3) is provided with two pipe insertion openings, and the two ends of the heating coil (301) pass through the two pipe insertion openings respectively, and the pipe walls at the two ends of the heating coil (301) are tightly connected to the pipe insertion openings.

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