Surface coating device of high-speed mixer

Abstract

The utility model discloses a surface coating device for a high-speed mixer, which relates to the technical field of lithium battery material manufacturing devices and comprises a mixing cylinder, a support is fixed on the outer wall of the bottom end of the mixing cylinder, an L-shaped plate is arranged at the top end of the support and positioned on one side of the mixing cylinder, and a coating liquid containing cylinder is arranged at the top end of the L-shaped plate. A gas adjusting hand valve is arranged at the position, located at the top end of the L-shaped plate, of one side of the wrapping liquid containing cylinder, and one end of the gas adjusting hand valve communicates with a gas flow meter. According to the coating device, the coating effect and the coating efficiency are improved, the coating liquid is sprayed and coated on the surface of the lithium ion ternary battery positive electrode material powder through the atomizing nozzle, so that the lithium ion ternary battery positive electrode material can be fully contacted with the coating liquid so as to be uniformly coated, and compared with a coating mode of spraying and mechanical stirring in the prior art, the coating effect is greatly improved. The modification effect, the production efficiency and the yield are improved; the flow of coating liquid of the atomizing nozzle is adjustable, and the atomizing efficiency and the atomizing range are controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery material manufacturing devices, in particular to a high-speed mixer surface coating device. Background Art

[0002] Due to the advantages of small size, light weight, high energy density, high cyclability and environmental protection, ternary lithium batteries are widely used in electronic mobile equipment, power tools, electric vehicles and other industries. As an important component of ternary lithium batteries, lithium-ion ternary battery positive electrode materials are also developing rapidly.

[0003] As the capacity of ternary lithium batteries increases, high-nickel lithium-ion ternary battery positive electrode materials are widely used. As the nickel content increases, the thermal stability and cyclability of the positive electrode materials will gradually decrease. At present, the main method to improve thermal stability and cyclability is to coat the positive electrode materials after doping and sintering. The coating method used is to add coating liquid and mix it evenly with the raw materials, and then perform a sintering process to finally obtain the coated lithium-ion ternary battery positive electrode material, such as Figure 7 The mixed coating process (the process within the dotted box) is shown, but this coating method is difficult to ensure uniform dispersion and uniform coating of the coating liquid, which ultimately affects product consistency.

[0004] A high-speed mixer is a machine that uses high-speed blades and centrifugal force to drive materials to rotate at high speed, and collisions cause the materials to form irregular motion. Because of its mixing or coating effect, it is widely used in the lithium battery industry, but it is generally used for solid phase coating and does not have the function of evenly coating the coating liquid on the surface of the positive electrode material of the lithium-ion ternary battery. Therefore, it is necessary to improve the high-speed mixer to achieve uniform mixing of the coating liquid and the positive electrode material of the lithium-ion ternary battery to ensure the uniformity and consistency of the coating.

[0005] The invention patent with Chinese patent publication number CN217452129U discloses a high-temperature coating device and a secondary coating sintering system for ternary battery positive electrode materials. This coating method is to spray the coating liquid in the form of small droplets to mix with the material. There are problems such as uneven distribution of the coating liquid, poor coating effect, and easy agglomeration of the material. A longer mixing and stirring time is required to allow the material and the coating liquid to fully contact and mix; water is added to the coating solvent, and the coated material needs to be dried, otherwise too much water will be brought into the sintering device to affect the sintering environment and the quality of the sintered product; in addition, this method and device are suitable for large-scale production lines, but not for small-scale tests and production lines. Therefore, in order to improve the coating effect and coating efficiency of the production process of small-scale tests and production lines, it is necessary to improve the high-speed mixer to realize the coating function and ensure the uniformity of the coating and the consistency of the product. Utility Model Content

[0006] Based on this, the purpose of the utility model is to provide a high-speed mixer surface coating device to solve the technical problems raised in the above background.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-speed mixer surface coating device comprises a mixing cylinder, a bracket is fixed to the outer wall of the bottom end of the mixing cylinder, an L-plate is arranged on the top of the bracket on one side of the mixing cylinder, a coating liquid storage cylinder is arranged on the top of the L-plate, a gas regulating hand valve is arranged on one side of the coating liquid storage cylinder on the top of the L-plate, a gas flow meter is connected to one end of the gas regulating hand valve, and compressed gas is connected to the other end of the gas regulating hand valve, a sealing cover is connected to the upper end of the mixing cylinder, a delivery pipe is connected to the top center of the top of the sealing cover, a chuck is connected to the top of the delivery pipe through a clamp, an aerosol nozzle penetrating the chuck is arranged above the chuck, the bottom end of the chuck is located in the sealing cover and is connected to the spray port of the atomizing nozzle, a second pneumatic hose is connected to the top air inlet of the aerosol nozzle, and the end of the second pneumatic hose is connected to the gas flow meter, a first pneumatic hose is connected to the liquid inlet of the curved outer wall of the aerosol nozzle, and the end of the first pneumatic hose extends into the coating liquid storage cylinder.

[0008] As a preferred technical solution of the surface coating device of a high-speed mixer of the utility model, the outer wall of the aerosol nozzle is provided with threads, which are locked on the chuck by a nut.

[0009] As a preferred technical solution of the high-speed mixer surface coating device of the utility model, the top end of the sealing cover is located on one side of the delivery pipe and is provided with an observation window, and the side of the delivery pipe away from the observation window is provided with an exhaust pipe.

[0010] As a preferred technical solution of the surface coating device of a high-speed mixer of the utility model, a driving motor is installed at the bottom end of the mixing drum, and the output end of the driving motor extends into the mixing drum and is connected to a stirring rod through a coupling.

[0011] As a preferred technical solution for the surface coating device of a high-speed mixer of the utility model, the curved outer wall of the mixing cylinder is connected to a finished product discharge pipe near the bottom end, and a plunger-type plug is installed at the end of the finished product discharge pipe. When discharging, the cylinder is opened to discharge the finished product.

[0012] As a preferred technical solution of a high-speed mixer surface coating device of the utility model, the L-plate has an L-arc appearance, and two sets of reinforcing plates are welded to the curved outer wall and the lower surface of the L-plate.

[0013] As a preferred technical solution for a high-speed mixer surface coating device of the utility model, a sealing disk is fixed in the exhaust pipe, a top disk slidably connected to the exhaust pipe is provided above the sealing disk, a frustum penetrating the sealing disk is fixed to the bottom end of the top disk, a conical opening is provided at the contact position between the sealing disk and the frustum, two groups of springs fixed to the bottom end of the top disk are provided at the top edge position of the sealing disk, two groups of notches are provided at the offset position between the curved outer wall of the top disk and the springs, a filter bag is fixed to the outside of the exhaust pipe, and the filter bag is fixed to the outside of the exhaust pipe by a circular pipe clamp.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] 1. The utility model improves the coating effect and coating efficiency. The coating liquid is sprayed on the surface of the lithium-ion ternary battery positive electrode material powder through the atomizing nozzle, so that the lithium-ion ternary battery positive electrode material can be fully in contact with the coating liquid, thereby being evenly coated. Compared with the coating method of spraying and mechanical stirring in the prior art, the modification effect, production efficiency and yield rate are improved. The coating liquid flow rate of the atomizing nozzle is adjustable, and the atomization efficiency and atomization range are controllable.

[0016] 2. As a preferred option, the atomizing nozzle is located at the center of the high-speed mixer lid, and the spray port is facing the center of the mixing barrel to achieve the best spray coating effect.

[0017] 3. As an improvement, the gas regulating hand valve can control the spray flow of the coating liquid by adjusting the opening to adjust the atomization effect.

[0018] 4. As an improvement, the gas flow meter can monitor the compressed gas flow in real time, and adjust the gas regulating valve in time according to the atomization effect to quantitatively control the atomization range, atomization effect and spray flow of the coating liquid.

[0019] 5. As an improvement, the power source is dry compressed gas to avoid the introduction of moisture through contact with air and reduce equipment costs and electricity costs.

[0020] 6. The device is simple, easy to operate, and saves time. There is no need to frequently add the coating liquid. Just insert the liquid inlet pneumatic hose into the coating liquid container, and the coating liquid will be continuously sprayed out from the spray port of the atomizing nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front perspective view of the utility model;

[0022] Figure 2 It is a rear perspective view of the utility model;

[0023] Figure 3 This is a structural diagram of a pot cover of the utility model;

[0024] Figure 4 It is a front partial cross-sectional view of the utility model;

[0025] Figure 5 It is a front cutaway view of the exhaust pipe of the utility model;

[0026] Figure 6 It is a top view of the utility model;

[0027] Figure 7 This is the current mixed coating flow chart.

[0028] In the figure: 100, mixing cylinder; 101, driving motor; 102, stirring rod;

[0029] 110. Sealing cover; 111. Delivery pipe; 112. Exhaust pipe; 113. Observation window; 114. Top plate; 115. Spring; 116. Cone; 117. Sealing plate; 118. Cone mouth; 119. Notch; 120. Bracket; 130. L-plate; 131. Reinforcement plate; 140. Coated liquid container cylinder; 141. First pneumatic hose; 150. Gas flow meter; 151. Second pneumatic hose; 152. Gas regulating manual valve; 160. Atomizing nozzle; 161. Chuck; 162. Atomizing nozzle spray port. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0031] The following describes an embodiment of the utility model based on its overall structure.

[0032] A high-speed mixer surface coating device, such as Figure 1-6As shown, it includes a mixing cylinder 100, a bracket 120 is fixed to the outer wall of the bottom end of the mixing cylinder 100, an L-plate 130 is provided at the top of the bracket 120 on one side of the mixing cylinder 100, a covering liquid container 140 is provided at the top of the L-plate 130, a gas regulating hand valve 152 is provided on one side of the covering liquid container 140 at the top of the L-plate 130, one end of the gas regulating hand valve 152 is connected to a gas flow meter 150, and the other end of the gas regulating hand valve 152 is connected to compressed gas, and the upper end of the mixing cylinder 100 is connected to a sealing cover 110, and the center position of the top end of the sealing cover 110 is connected to a gas flow meter 150. The delivery pipe 111, the top of the delivery pipe 111 is connected to the chuck 161 through a clamp, an aerosol nozzle 160 is provided above the chuck 161 and passes through the chuck 161, the bottom end of the chuck 161 is located in the sealing cover 110 and is connected to the atomizing nozzle spray port 162, the top air inlet of the aerosol nozzle 160 is connected to the second pneumatic hose 151, and the end of the second pneumatic hose 151 is connected to the gas flow meter 150, the liquid inlet of the curved outer wall of the aerosol nozzle 160 is connected to the first pneumatic hose 141, and the end of the first pneumatic hose 141 extends into the sheathed liquid container 140.

[0033] The surface coating device of the utility model is used to coat 10 kg of lithium-ion ternary battery positive electrode material. The coating process is as follows:

[0034] (1) Open the sealing cover 110 at the upper end of the mixing drum 100, add 10 kg of lithium-ion ternary battery positive electrode material powder into the mixing drum 100, start the driving motor 101 and the stirring rod 102 connected to its output end to mix the lithium-ion ternary battery positive electrode material powder, and mix evenly at a speed of 600 rpm for 5 minutes.

[0035] (2) Before starting the driving motor 101, the element compound to be coated is dissolved in the coating solvent to obtain 500 ml of coating solution.

[0036] (3) Insert the first pneumatic hose 141 into the bottom of the sheathed liquid container 140, and manually adjust the gas regulating valve 152 to start introducing compressed gas.

[0037] (4) Due to the siphon effect, the coating liquid enters the atomizing nozzle 160 through the first pneumatic hose 141, and the atomizing nozzle 160 atomizes the coating liquid. The atomization range and effect are checked through the observation window 113 on the top of the sealing cover 110, and the opening of the gas regulating hand valve 152 is manually adjusted to adjust the optimal atomization range and effect. The compressed gas flow rate displayed by the gas flow meter 150 is monitored in real time. The compressed gas flow rate displayed when the best atomization effect is achieved is 5.7m3 / h. The atomized coating liquid is sprayed onto the surface of the positive electrode material of the lithium-ion ternary battery from the atomizing nozzle spray port 162.

[0038] (5) After the spraying is completed, close the gas regulating manual valve 152 to stop the use of compressed gas, and adjust the speed of the driving motor 101 to 1200 rpm, and continue to rotate and mix for 5 minutes, so that the coating liquid is evenly coated on the surface of the lithium-ion ternary battery positive electrode material powder.

[0039] (6) After the coating is completed, the operation of the driving motor 101 is stopped, and the coated lithium-ion ternary battery positive electrode material is unloaded.

[0040] The following points should be noted in the above process:

[0041] The mixing speed of the driving motor 101 in step 1 is 600 rpm, and the mixing time is 5 minutes, which are the optimal mixing speed and time in this embodiment, but are not applicable to all coating processes. The specific coating process needs to be set according to the actual material feeding situation to ensure uniform mixing.

[0042] The compressed gas flow rate of step 4 is 5.7m3 / h, which is the compressed gas flow rate for achieving the best atomization range and effect in this embodiment. It is not suitable for all surface coating processes. During specific coating, the compressed gas flow rate of this step needs to be adjusted and set according to the actual atomization effect to achieve that the coating liquid is evenly sprayed in the form of mist from the atomizing nozzle spray port 162 on the surface of the lithium-ion ternary battery positive electrode material.

[0043] The mixing speed of the driving motor 101 in step 5 is 1200 rpm, and the mixing time is 5 minutes, which is the optimal mixing speed and time for this embodiment. It is not applicable to all surface coating processes. The specific coating needs to be set according to the actual material feeding situation to ensure that the coating liquid is evenly coated on the surface of the lithium-ion ternary battery positive electrode material.

[0044] Please refer to Figure 1 and Figure 2 The outer wall of the aerosol nozzle 160 is provided with threads and is locked on the chuck 161 by a nut.

[0045] The nut is used to lock the aerosol nozzle 160, thereby facilitating its disassembly and assembly.

[0046] Please refer to Figure 4 , Figure 5 and Figure 6, an observation window 113 is provided at the top of the sealing cover 110, which is located on one side of the delivery pipe 111; an exhaust pipe 112 is provided on the side of the delivery pipe 111 away from the observation window 113; a sealing disk 117 is fixed in the exhaust pipe 112; a top disk 114 slidably connected to the exhaust pipe 112 is provided above the sealing disk 117; a frustum 116 penetrating the sealing disk 117 is fixed at the bottom end of the top disk 114; a conical opening 118 is provided at the contact position between the sealing disk 117 and the frustum 116; two groups of springs 115 fixed to the bottom end of the top disk 114 are provided at the top edge position of the sealing disk 117; two groups of notches 119 are provided at the offset position between the curved outer wall of the top disk 114 and the spring 115; a filter bag is fixed on the outside of the exhaust pipe 112, and the filter bag is fixed to the outside of the exhaust pipe 112 by a circular pipe clamp (the filter bag and the circular pipe clamp are both prior art and are not drawn in the figure).

[0047] When the pressure inside the mixing barrel 100 is too high, the pressure exerts an upward squeezing force on the cone 116, causing the cone 116 and the top plate 114 to rise together and stretch the spring 115, so that a gap is generated between the cone 116 and the cone mouth 118, so that the gas inside the mixing barrel 100 flows through the gap between the cone mouth 118 and the cone 116, and is discharged through the notch 119, and then the lithium-ion ternary battery positive electrode material powder mixed in the gas is intercepted by the filter bag 170, and the filtered gas can be directly discharged into the external environment, thereby completing the pressure relief effect in the mixing barrel 100, and then recovering under the action of the spring 115.

[0048] Please refer to Figure 4 A driving motor 101 is installed at the bottom end of the mixing barrel 100, and the output end of the driving motor 101 extends into the mixing barrel 100 and is connected to a stirring rod 102 through a coupling.

[0049] The driving motor 101 provides power to the stirring rod 102 , so that the lithium-ion ternary battery positive electrode material inside the mixing barrel 100 can be stirred at a high speed.

[0050] Please refer to Figure 1 The curved outer wall of the mixing barrel 100 is connected to a finished product discharge pipe near the bottom end, and a plunger plug is installed at the end of the finished product discharge pipe. When discharging the material, the cylinder is opened to discharge the finished product.

[0051] The coated lithium-ion ternary battery positive electrode material can be taken out by opening the cylinder.

[0052] Please refer to Figure 1 and Figure 2 The L plate 130 has an L-arc appearance, and two sets of reinforcing plates 131 are welded to the curved outer wall and the lower surface of the L plate 130 .

[0053] A certain supporting strength is provided to the L-plate 130 so that it can bear a certain weight and better avoid deformation.

[0054] When in use, the surface coating device of the utility model is used to coat 10 kg of lithium-ion ternary battery positive electrode material. The coating process is as follows:

[0055] (1) Open the sealing cover 110 at the upper end of the mixing drum 100, add 10 kg of lithium-ion ternary battery positive electrode material powder into the mixing drum 100, start the driving motor 101 and the stirring rod 102 connected to its output end to mix the lithium-ion ternary battery positive electrode material powder, and mix evenly at a speed of 600 rpm for 5 minutes.

[0056] (2) Before starting the driving motor 101, the element compound to be coated is dissolved in the coating solvent to obtain 500 ml of coating solution.

[0057] (3) Insert the first pneumatic hose 141 into the bottom of the sheathed liquid container 140, and manually adjust the gas regulating valve 152 to start introducing compressed gas.

[0058] (4) Due to the siphon effect, the coating liquid enters the atomizing nozzle 160 through the first pneumatic hose 141, and the atomizing nozzle 160 atomizes the coating liquid. The atomization range and effect are checked through the observation window 113 on the top of the sealing cover 110, and the opening of the gas regulating hand valve 152 is manually adjusted to adjust the optimal atomization range and effect. The compressed gas flow rate displayed by the gas flow meter 150 is monitored in real time. The compressed gas flow rate displayed when the best atomization effect is achieved is 5.7m3 / h. The atomized coating liquid is sprayed onto the surface of the positive electrode material of the lithium-ion ternary battery from the atomizing nozzle spray port 162.

[0059] (5) After the spraying is completed, close the gas regulating manual valve 152 to stop the use of compressed gas, and adjust the speed of the driving motor 101 to 1200 rpm, and continue to rotate and mix for 5 minutes, so that the coating liquid is evenly coated on the surface of the lithium-ion ternary battery positive electrode material powder.

[0060] (6) After the coating is completed, the operation of the driving motor 101 is stopped, and the coated lithium-ion ternary battery positive electrode material is unloaded.

[0061] The following points should be noted in the above process:

[0062] The mixing speed of the driving motor 101 in step 1 is 600 rpm, and the mixing time is 5 minutes, which are the optimal mixing speed and time in this embodiment, but are not applicable to all coating processes. The specific coating process needs to be set according to the actual material feeding situation to ensure uniform mixing.

[0063] The compressed gas flow rate of step 4 is 5.7m3 / h, which is the compressed gas flow rate for achieving the best atomization range and effect in this embodiment. It is not suitable for all surface coating processes. During specific coating, the compressed gas flow rate of this step needs to be adjusted and set according to the actual atomization effect to achieve that the coating liquid is evenly sprayed in the form of mist from the atomizing nozzle spray port 162 on the surface of the lithium-ion ternary battery positive electrode material.

[0064] The mixing speed of the driving motor 101 in step 5 is 1200 rpm, and the mixing time is 5 minutes, which are the optimal mixing speed and time in this embodiment, but are not applicable to all surface coating processes. The specific coating needs to be set according to the actual material feeding situation to ensure that the coating liquid is evenly coated on the surface of the lithium-ion ternary battery positive electrode material. The parts not involved in the device are the same as the prior art or can be implemented using the prior art.

[0065] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A high-speed mixer surface coating device, comprising a mixing barrel (100), characterized in that: A bracket (120) is fixed to the outer wall of the bottom end of the mixing cylinder (100); an L-plate (130) is provided at the top end of the bracket (120) located on one side of the mixing cylinder (100); a covering liquid container (140) is provided at the top end of the L-plate (130); a gas regulating hand valve (152) is provided at one side of the covering liquid container (140) located on the top end of the L-plate (130); one end of the gas regulating hand valve (152) is connected to a gas flow meter (150); the other end of the gas delivery regulating hand valve (152) is connected to compressed gas; the upper end of the mixing cylinder (100) is connected to a sealing cover (110); a delivery pipe (152) is connected at the center of the top end of the sealing cover (110). 11), the top end of the delivery pipe (111) is connected to a chuck (161) through a clamp, an aerosol nozzle (160) penetrating the chuck (161) is provided above the chuck (161), the bottom end of the chuck (161) is located in the sealing cover (110) and is connected to an atomizing nozzle spray port (162), the top air inlet of the aerosol nozzle (160) is connected to a second pneumatic hose (151), and the end of the second pneumatic hose (151) is connected to a gas flow meter (150), the liquid inlet of the curved outer wall of the aerosol nozzle (160) is connected to a first pneumatic hose (141), and the end of the first pneumatic hose (141) extends into the sheathed liquid container (140).

2. A high-speed mixer surface coating device according to claim 1, characterized in that: The outer wall of the aerosol nozzle (160) is provided with a thread and is locked on the chuck (161) via a nut.

3. The surface coating device of a high-speed mixer according to claim 1, characterized in that: An observation window (113) is provided at the top end of the sealing cover (110) on one side of the delivery pipe (111), and an exhaust pipe (112) is provided on the side of the delivery pipe (111) away from the observation window (113).

4. The high-speed mixer surface coating device according to claim 1, characterized in that: A driving motor (101) is installed at the bottom end of the mixing barrel (100), and an output end of the driving motor (101) extends into the mixing barrel (100) and is connected to a stirring rod (102) via a coupling.

5. The high-speed mixer surface coating device according to claim 1, characterized in that: The curved outer wall of the mixing cylinder (100) is connected to a finished product discharge pipe near the bottom end, and a plunger plug is installed at the end of the finished product discharge pipe. When discharging the material, the cylinder is opened to discharge the finished product.

6. The high-speed mixer surface coating device according to claim 1, characterized in that: The L-plate (130) has an L-arc appearance, and two groups of reinforcing plates (131) are welded to the curved outer wall and the lower surface of the L-plate (130).

7. The high-speed mixer surface coating device according to claim 3, characterized in that: A sealing disk (117) is fixed in the exhaust pipe (112); a top disk (114) slidably connected to the exhaust pipe (112) is provided above the sealing disk (117); a cone (116) penetrating the sealing disk (117) is fixed at the bottom end of the top disk (114); a cone opening (118) is provided at the contact position between the sealing disk (117) and the cone (116); two groups of springs (115) fixed to the bottom end of the top disk (114) are provided at the top edge of the sealing disk (117); two groups of notches (119) are provided at the offset position between the curved outer wall of the top disk (114) and the springs (115); a filter bag is fixed to the outside of the exhaust pipe (112); the filter bag is fixed to the outside of the exhaust pipe by a circular pipe clamp.

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