Multifunctional coating etching reaction kettle

Abstract

The utility model discloses a multifunctional coating etching reaction kettle, which comprises a reaction kettle body, a coating layer, a coating layer, a coating layer and a coating layer, and is characterized in that the reaction kettle body is mounted on a preparation platform; the reaction kettle body comprises a reaction bin, a solid coating agent bin is arranged at the bottom of the reaction bin, a stirring paddle is arranged at the top of the solid coating agent bin, a feed temporary storage bin and a spray generator are arranged at the top of the reaction bin, the reaction bin is communicated with a pickling solution temporary storage bin through a liquid guide pipe, and a peristaltic pump is arranged on the liquid guide pipe. According to the utility model, the main body is the reaction kettle with the stirring paddle, the vent holes are formed in the stirring paddle, high-temperature gas which is heated and decomposed from the lower part can be released and is used for uniformly coating the surface of a lithium battery positive electrode material with a gas phase, and the spray generator and the peristaltic pump are arranged above the reaction kettle, so that uniform etching of an acid solution can be carried out while gas phase coating is carried out; the production efficiency is effectively improved, and the uniformity of the surface coating and etching process of the lithium battery positive electrode material can be effectively controlled, so that the comprehensive performance of the lithium battery positive electrode material is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrode material preparation equipment technical field, concretely relates to a multifunctional coating etching reaction kettle. BACKGROUND

[0002] Lithium battery is a kind of battery by lithium metal or lithium alloy as positive / negative electrode material, using non-aqueous electrolyte solution.In the preparation field of lithium battery positive material, lithium-rich manganese-based positive material becomes extremely potential research direction by virtue of its high specific capacity, high operating voltage and other advantages.In its production preparation process, gas phase coating and acidic liquid etching treatment are two extremely critical steps of improving material performance.Gas phase coating can build a layer of uniform protective film on the material surface, effectively improve the structural stability and cycle life of material;Acidic liquid etching treatment can accurately control the surface structure and chemical composition of material, significantly improve the ion diffusion rate and electronic conductivity of material.

[0003] In prior art, coating and etching process are usually carried out in steps, so that the whole production cycle is longer, and production efficiency is lower, and in actual operation, due to the conversion and connection of multiple processes, the uniformity of coating and etching process cannot be controlled, leading to poor performance consistency of lithium positive material. UTILITY MODEL CONTENT

[0004] The utility model discloses a multifunctional coating etching reaction kettle.

[0005] The utility model discloses a multifunctional coating etching reaction kettle in order to realize above-mentioned purpose specific adoption following technical scheme, including:

[0006] Reaction kettle body, the reaction kettle body is installed on preparation platform;

[0007] The reaction kettle body includes reaction bin, the reaction bin bottom is provided with solid coating agent bin, the solid coating agent bin top is provided with stirring paddle, the reaction bin top is provided with feed temporary storage bin and spray generator, the reaction bin is passed through liquid conduit and pickling solution temporary storage bin intercommunication, be provided with peristaltic pump on the liquid conduit;

[0008] Wherein, the spray generator (10) and the peristaltic pump (12) are used to spray acid solution to reaction bin (5) to etch raw materials.

[0009] As further description of the above technical scheme, the stirring paddle includes multiple groups of stirring blades of different heights, and air holes are symmetrically arranged on the stirring blades.

[0010] As further description of the above technical scheme, the spray generator is installed on one side of the top of the reaction bin, and the spray generator is communicated with the pickling solution temporary storage bin through the liquid conduit.

[0011] As a further description of the above technical solution, the spray angle of the spray generator is 40-110°.

[0012] As a further description of the above technical solution, the reaction bin is provided with a temperature monitoring device on one side.

[0013] As a further description of the above technical solution, the reaction bin is provided with a discharge port on the other side.

[0014] As a further description of the above technical solution, a stirring motor is installed on the preparation platform, and the output end of the stirring motor is rotationally connected with the stirring paddle.

[0015] As a further description of the above technical solution, an electric heating device is arranged in the preparation platform, and the top of the electric heating device is attached to the bottom of the solid coating agent bin.

[0016] As a further description of the above technical solution, a magnetic stirring device is arranged in the preparation platform, and the magnetic stirring device is attached to the bottom of the pickling solution temporary storage bin.

[0017] As a further description of the above technical solution, a power supply control device is arranged in the preparation platform, and the power supply control device is electrically connected with the stirring motor, the electric heating device and the magnetic stirring device.

[0018] The beneficial effects of the present application are as follows:

[0019] The utility model discloses a reaction kettle with stirring paddle, and the gas hole is arranged on the stirring paddle, can release the high-temperature gas from the heating decomposition below, is used for the uniform gas phase coating on the surface of lithium electricity positive pole material, and the spray generator and peristaltic pump are arranged on the reaction kettle top, can carry out the uniform etching of acid solution simultaneously with the gas phase coating, reaches the effect that the gas phase coating and pickling etching carry out simultaneously, improves production efficiency effectively, and can effectively control the uniformity of lithium electricity positive pole material surface coating and etching process, and then enhances the comprehensive performance of lithium electricity positive pole material.

[0020] In order to more clearly set forth the structural features and effects of the utility model, the utility model is described in detail below by combining with the drawings and specific embodiments. DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of the multifunctional coating etching reaction kettle of the utility model.

[0022] Reference signs:

[0023] 1, power control device; 2, stirring motor; 3, electric heating device; 4, solid coating agent bin; 5, reaction bin; 6, temperature monitoring device; 7, stirring paddle; 8, feed temporary storage bin; 9, liquid conduit; 10, spray generator; 11, discharge port; 12, peristaltic pump; 13, pickling solution temporary storage bin; 14, magnetic stirring device. DETAILED DESCRIPTION

[0024] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0025] As Figure 1 shown, in one embodiment, a multifunctional coating etching reaction kettle comprises: a reaction kettle body, which is installed on a preparation platform;

[0026] The reaction kettle body comprises a reaction bin 5 for placing positive electrode materials (for example, lithium-rich manganese-based positive electrode materials) to perform uniform etching of the positive electrode materials by an acidic solution while performing gas-phase coating; additionally, the bottom of the reaction bin 5 is provided with a solid coating agent bin 4 for placing solid coating agents (for example, ammonium bicarbonate), and the top of the solid coating agent bin 4 is provided with a stirring paddle 7, which can release high-temperature gas generated by heating and decomposition from below when rotating; in addition, the top of the reaction bin 5 is provided with a feed temporary storage bin 8 and a spray generator 10, and the reaction bin 5 is communicated with a pickling solution temporary storage bin 13 through a liquid conduit 9, and the liquid conduit 9 is further provided with a peristaltic pump 12, so that the spray generator 10 sprays the acidic solution in the liquid conduit 9 into the reaction bin 5 at a constant flow rate and a preset angle under the action of the peristaltic pump 12, thereby etching the positive electrode materials in the reaction bin 5 by the acidic solution.

[0027] Specifically, the stirring paddle 7 comprises multiple groups of stirring blades with different heights, and the stirring blades are symmetrically provided with air permeable holes, which can stably release the high-temperature gas generated by heating and decomposition in the solid coating agent bin 4 to the surface of the positive electrode materials in the reaction bin 5 when rotating.

[0028] Further, the spray generator 10 is installed on one side of the top of the reaction bin 5, and the spray generator 10 is communicated with the pickling solution temporary storage bin 13 through the liquid conduit 9. Specifically, the spray angle of the spray generator 10 is 40-110°, and the spray generator 10 and the peristaltic pump 12 can accurately control the spray flow rate and spray range of the acidic solution.

[0029] It needs to be particularly pointed out that the reaction bin 5 is further provided with a temperature monitoring device 6 (for example, a thermometer or a temperature sensor) on one side, which can monitor the temperature in the reaction bin 5 in real time; and the reaction bin 5 is further provided with a discharge port 11 on the other side, which is used to take out the positive electrode materials treated by gas-phase and spray double coating.

[0030] Please continue to see Figure 1 In the embodiment, the preparation platform is provided with a stirring motor 2, and the output end of the stirring motor 2 is rotationally connected with the stirring paddle 7 (the stirring motor 2 and the stirring paddle 7 can be rotationally connected through a shaft coupling, a gear transmission or a belt transmission, etc., which is prior art and not shown in the schematic diagram of the present application). After the stirring motor 2 is started, the stirring paddle 7 can be driven to rotate at a preset speed.

[0031] Further, the preparation platform is provided with an electric heating device 3 (which can be an electric heating wire or an electric heating rod, etc.), and the top of the electric heating device 3 is attached to the bottom of the solid coating agent bin 4. During work, the solid coating agent in the solid coating agent bin 4 can be heated and decomposed to generate high-temperature gas. In addition, the preparation platform is also provided with a magnetic stirring device 14, and the magnetic stirring device 14 is attached to the bottom of the pickling solution temporary storage bin 13 (a magnetic stirring sub is placed in the pickling solution temporary storage bin 13). During work, the magnetic stirring sub can be rotated to stir the acidic solution in the pickling solution temporary storage bin 13.

[0032] It can be understood that the preparation platform is provided with a power control device 1, and the power control device 1 is electrically connected with the stirring motor 2, the electric heating device 3 and the magnetic stirring device 14. The power control device 1 can be used to turn on and off the stirring motor 2, the electric heating device 3 and the magnetic stirring device 14, and set and adjust the working parameters thereof.

[0033] Working principle:

[0034] (I) Preparation stage

[0035] A proper amount of lithium-rich manganese-based positive electrode material is placed in the reaction bin 5, then a proper amount of ammonium bicarbonate is placed in the solid coating agent bin 4, and then an acidic solution with a suitable concentration is placed in the pickling solution temporary storage bin 13. The magnetic stirring device 14 is turned on, the spraying amount and range of the spray generator 10 are adjusted, it is checked whether the temperature monitoring device 6 is working normally, and the heating temperature of the electric heating device 3 is set.

[0036] (II) Gas phase coating and acidic solution etching stage

[0037] The stirring motor 2 is started to drive the stirring paddle 7 to rotate, and then the heating device is started to heat and decompose the substance in the solid coating agent bin 4 to generate high-temperature gas, and the high-temperature gas is released into the reaction bin 5 through the gas-permeable holes on the stirring paddle 7, and then gas-phase coating is carried out on the surface of the lithium battery positive electrode material; then the peristaltic pump 12 and the spray generator 10 are started, so that the spray generator 10 sprays the acid solution in the liquid conduit 9 into the reaction bin 5 at a constant flow rate and a preset angle under the action of the peristaltic pump 12, and then the acid solution etching is carried out on the positive electrode material in the reaction bin 5, and the temperature in the reaction bin 5 is monitored in real time through the temperature monitoring device 6 during the whole process, and adjustment is made according to the need;

[0038] (III) Reaction completion and product processing stage

[0039] After the reaction is completed, the heating device, the stirring motor 2, the peristaltic pump 12 and the spray generator 10 are turned off, and the lithium-rich manganese-based positive electrode material after the reaction is taken out from the discharge port 11 of the reaction bin 5 for subsequent cleaning, drying and other processing steps, so as to obtain the lithium-rich manganese-based positive electrode material treated by the gas-phase and spray double coating.

[0040] Through the above technical scheme, the production efficiency is effectively improved, and the uniformity of the surface coating and etching process of the lithium battery positive electrode material can be effectively controlled, and the comprehensive performance of the lithium battery positive electrode material is improved.

[0041] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope of principles and novel features disclosed herein.

Claims

1. A multifunctional coating etching reaction kettle, characterized in that, Include: The reaction kettle body is installed on the preparation platform; The reaction kettle body includes a reaction bin (5) provided with a solid coating agent bin (4) at the bottom, a stirring paddle (7) at the top of the solid coating agent bin (4), a feed temporary storage bin (8) and a spray generator (10) at the top of the reaction bin (5), and the reaction bin (5) is communicated with the liquid conduit (9) and the pickling solution temporary storage bin (13), and the peristaltic pump (12) is arranged on the liquid conduit (9). The spray generator (10) and the peristaltic pump (12) are used to spray acid solution to the reaction bin (5) to etch the raw materials.

2. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The stirring paddle (7) includes multiple groups of stirring blades with different heights, and the stirring blades are symmetrically provided with air holes.

3. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The spray generator (10) is installed on one side of the top of the reaction bin (5), and the spray generator (10) is communicated with the liquid conduit (9) and the pickling solution temporary storage bin (13).

4. The multifunctional cladding etching reaction kettle according to claim 3, characterized in that, The spray angle of the spray generator (10) is 40-110°.

5. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The reaction bin (5) is provided with a temperature monitoring device (6) on one side.

6. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The reaction bin (5) is provided with a discharge port (11) on the other side.

7. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The preparation platform is provided with a stirring motor (2), and the output end of the stirring motor (2) is rotationally connected with the stirring paddle (7).

8. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The preparation platform is provided with an electric heating device (3), and the top of the electric heating device (3) is attached to the bottom of the solid coating agent bin (4).

9. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The preparation platform is provided with a magnetic stirring device (14), and the magnetic stirring device (14) is attached to the bottom of the pickling solution temporary storage bin (13).

10. The multifunctional cladding etching reaction kettle according to claim 1, characterized in that, The preparation platform is provided with a power control device (1), and the power control device (1) is electrically connected with the stirring motor (2), the electric heating device (3) and the magnetic stirring device (14).

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