Lithium battery positive electrode ingredient temperature control mixing and stirring kettle

Abstract

The utility model relates to a temperature-control mixing and stirring kettle for lithium battery anode burdening, and belongs to the technical field of lithium battery processing equipment. The stirring shaft is provided with the spiral blade, the propeller blade and the L-shaped scraping plate, so that the slurry can be simultaneously stirred in the axial direction and the radial direction, the spiral blade lifts the slurry to the upper part from the bottom of the kettle and continuously turns and mixes the slurry, the diffusion and mixing of the slurry are facilitated, the uniformity of the slurry is improved, and the production efficiency is improved. The L-shaped scraping plate can scrape the slurry adhered to the inner wall of the kettle body and stir the slurry again, so that the problem of non-uniform mixing of the slurry is avoided; the two groups of feeding assemblies are arranged, and the upper and lower groups of shunting pipes are arranged in an inserted manner, so that an acid solution and an alkali solution are more uniformly distributed in the kettle body, and the reaction efficiency of ingredient mixing is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery processing equipment, specifically relating to a temperature-controlled mixing and stirring kettle for lithium battery positive electrode material preparation. Background Technology

[0002] The mixing and dispersion process in lithium-ion battery production involves reacting solutions containing acidic and alkaline materials in a stirred tank to form cobalt-nickel-manganese hydroxide powder.

[0003] Currently, the stirred tanks commonly used for lithium battery cathode material preparation typically have two feed pipes: one for acid solutions and the other for alkaline solutions. Because the reactant concentrations near the inlets of these two feed pipes are relatively high, uneven concentration distribution can easily occur, reducing the efficiency of the mixing reaction. Furthermore, the impellers in most stirred tanks exhibit discontinuous axial stirring, making it difficult to agitate the slurry deposited at the bottom. Under gravity, the slurry gradually settles and adheres to the bottom of the stirred tank, resulting in insufficient mixing and potentially causing localized unevenness in the battery, thus affecting the battery's capacity, internal resistance, and cycle life. Utility Model Content

[0004] To overcome the problems in the prior art where the reactant concentration near the inlet of the two feed pipes of the stirred tank is high, easily leading to uneven concentration distribution and reduced mixing efficiency, and where the impellers in most stirred tanks are discontinuous in axial stirring, making it difficult to stir the slurry deposited at the bottom, causing the slurry to gradually settle and stick to the bottom of the stirred tank under gravity, resulting in insufficient mixing and potentially causing localized unevenness in the battery, thus affecting the battery's capacity, internal resistance, and cycle life, this utility model provides a temperature-controlled mixing stirred tank for lithium battery positive electrode preparation; By installing spiral blades, propeller blades, and L-shaped scrapers on the stirring shaft, the slurry can be stirred simultaneously in the axial and radial directions. The spiral blades lift the slurry from the bottom to the top of the vessel and continuously tumble and mix it, which is beneficial for the diffusion and mixing of the slurry and improves its uniformity. The L-shaped scrapers can scrape up the slurry adhering to the inner wall of the vessel and re-stir it, avoiding the problem of uneven mixing. By setting up two sets of feeding components and inserting the upper and lower flow pipes, the acid solution and alkali solution are more evenly distributed in the vessel, improving the reaction efficiency of the batching and mixing.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A lithium battery positive electrode material mixing and temperature-controlled mixing vessel mainly includes a vessel body, a top cover, a stirring mechanism, a feeding assembly, a motor, a discharge port, and a controller. The vessel body is designed as a hollow structure, with a discharge port with a valve switch at its bottom. The top cover is installed on the top of the vessel body via a flange. A spiral stirring mechanism is installed inside the vessel body. The stirring mechanism includes a stirring shaft, an L-shaped scraper, spiral blades, a propeller blade, and a connecting plate. The top of the stirring shaft is mounted on the top cover via a bearing. Spiral blades for lifting the slurry are provided on the stirring shaft. Connecting plates are evenly installed on the stirring shaft along the circumferential direction. One end of the L-shaped scraper is installed with... At one end of the connecting plate, the other end is installed at the bottom of the stirring shaft, and the scraping end of the L-shaped scraper is in contact with the inner wall of the vessel. Two propeller blades for stirring the slurry are installed between the L-shaped scraper blades. The controller is installed on the side wall of the vessel, and the motor is installed on the top cover and electrically connected to the controller. The output shaft of the motor is connected to the stirring shaft. Two sets of feeding components are installed inside the vessel. The feeding components are located directly above the stirring mechanism. The feeding components include a feeding pipe, an annular guide pipe, and a diversion pipe. Diversion pipes are evenly arranged along the circumferential direction on the annular guide pipe, and the upper and lower sets of diversion pipes are inserted into each other. Feed holes are opened equidistantly along the axial direction on the diversion pipe. One end of the feeding pipe passes through the vessel and is connected to the annular guide pipe.

[0006] The vessel body is provided with an insulation shell on the outside, and a cavity is formed between the insulation shell and the outer wall of the vessel body. An electric heating tube is coiled on the outer wall of the vessel body inside the cavity, and the electric heating tube is electrically connected to the controller.

[0007] The bottom of the vessel is equipped with a temperature sensor and a pH meter for measuring the mixture inside, and a pressure sensor is installed on the top cover. The temperature sensor, pH meter and pressure sensor are all electrically connected to the controller.

[0008] The top cover is equipped with an air inlet valve and an air outlet valve. The air outlet valve is connected to a vacuum pump via a pipe, and the vacuum pump is electrically connected to a controller.

[0009] The beneficial effects of this utility model are:

[0010] This invention, by equipping the stirring shaft with spiral blades, propeller blades, and an L-shaped scraper, can simultaneously stir the slurry in both the axial and radial directions. The spiral blades lift the slurry from the bottom to the top of the vessel, continuously agitating and mixing it, which is beneficial for the diffusion and mixing of the slurry and improves its uniformity. The L-shaped scraper can scrape up the slurry adhering to the inner wall of the vessel and re-stir it, avoiding the problem of uneven mixing. By setting up two sets of feeding components, and with the upper and lower flow pipes interposed, the acid and alkali solutions are more evenly distributed in the vessel, improving the reaction efficiency of the batching and mixing. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0012] Figure 2 This is a three-dimensional schematic diagram of the internal structure of this utility model.

[0013] Figure 3 This is a three-dimensional cross-sectional view of the present invention.

[0014] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle. Detailed Implementation

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0016] This utility model discloses a lithium battery cathode material temperature-controlled mixing and stirring vessel. The vessel mainly includes a vessel body 1, a top cover 2, a stirring mechanism 3, a feeding assembly 4, a motor 5, a discharge port 8, and a controller 9. The vessel body 1 has a hollow structure with a discharge port 8 equipped with a valve at its bottom. The top cover 2 is mounted on the top of the vessel body 1 via a flange. A spiral stirring mechanism 3 is installed inside the vessel body 1. The stirring mechanism 3 includes a stirring shaft 301, an L-shaped scraper 302, spiral blades 303, a propeller blade 304, and a connecting plate 305. The top of the stirring shaft 301 is mounted on the top cover 2 via a bearing. Spiral blades 303 for lifting the slurry are provided on the stirring shaft 301. The connecting plate 305 is evenly installed along the circumference of the stirring shaft 301, and one end of the L-shaped scraper 302 is mounted on the connecting plate. The end of the L-shaped scraper 302 is installed at the bottom of the stirring shaft 301, and the scraping end of the L-shaped scraper 302 is in contact with the inner wall of the vessel body 1. Two propeller blades 304 for stirring the slurry are installed between the L-shaped scraper blades 302. The controller 9 is installed on the side wall of the vessel body 1. The motor 5 is installed on the top cover 2 and is electrically connected to the controller 9. The output shaft of the motor 5 is connected to the stirring shaft 301 for transmission. Two sets of feeding components 4 are installed inside the vessel body 1. The feeding components 4 are located directly above the stirring mechanism 3. The feeding components 4 include a feeding pipe 401, an annular guide pipe 402, and a diversion pipe 403. Diversion pipes 403 are evenly arranged along the circumferential direction on the annular guide pipe 402, and the upper and lower sets of diversion pipes 403 are inserted. Feed holes are opened equidistantly along the axial direction on the diversion pipe 403. One end of the feeding pipe 401 passes through the vessel body 1 and is connected to the annular guide pipe 402.

[0017] First, the acid and alkali solutions to be mixed are injected into the annular guide pipe 402 through the feed pipe 401, and then evenly distributed into the vessel body 1 through the feed hole on the diverter pipe 403. Then, the motor 5 is started, and the output shaft of the motor 5 drives the stirring shaft 301 to rotate. The spiral blades 303 on the stirring shaft 301 lift the slurry at the bottom of the vessel body 1 to the top, and continuously tumble and mix the slurry, so that the slurry is fully diffused and mixed in both the axial and radial directions. At the same time, the propeller blades 304 also stir the slurry, further improving the mixing effect. During the stirring process, the L-shaped scraper 302 scrapes up the slurry adhering to the inner wall of the vessel body 1 and re-stirs it as the stirring shaft 301 rotates, avoiding the problem of uneven mixing of the slurry. Through the design of the stirring mechanism and the feed assembly, this utility model can achieve efficient and uniform mixing, thereby ensuring the quality and performance of the lithium battery cathode material.

[0018] The vessel body 1 is provided with an insulation shell 6 on the outside, and a cavity is formed between the insulation shell 6 and the outer wall of the vessel body 1. An electric heating tube 10 is coiled on the outer wall of the vessel body 1 in the cavity. The electric heating tube 10 is electrically connected to the controller 9. When the vessel body 1 needs to be heated, the controller 9 supplies power to the electric heating tube 10 to heat the outer wall of the vessel body 1 and transfer the heat to the inside of the vessel body 1 to heat the slurry. The heating temperature can be precisely controlled by controlling the magnitude of the current and the on / off time.

[0019] The bottom of the vessel body 1 is equipped with a temperature sensor 11 and a pH meter 12 for measuring the mixture inside. The top cover 2 is equipped with a pressure sensor 7. The temperature sensor 11, pH meter 12 and pressure sensor 7 are all electrically connected to the controller 9. The controller 9 can monitor the temperature, pH value and pressure inside the vessel body 1 in real time and transmit these data to the controller 9. The controller 9 controls and adjusts the reaction inside the vessel body 1 based on these data to ensure the smooth progress of the reaction and the stability of the product quality.

[0020] The top cover 2 is equipped with an air inlet valve 102 and an air outlet valve 102. The air outlet valve 102 is connected to a vacuum pump through a pipe, and the vacuum pump is electrically connected to the controller 9. In use, the air inlet valve 102 is closed, the vacuum pump is started, and the gas inside the vessel 1 is extracted to form a vacuum environment. This can effectively extract the gas from the gaps and surface of the material, reduce the resistance to liquid adsorption, and make it easier for the liquid to penetrate between the solid particles, thus promoting the dispersion process and improving the dispersion speed and efficiency.

[0021] Work process:

[0022] First, the slurry to be mixed is fed into the annular guide pipe 402 through the feed pipe 401, and then flows into the vessel body 1 through the feed hole on the diversion pipe 403. Since the upper and lower diversion pipes 403 are interposed, the slurry can be more evenly distributed in the vessel body 1, which is beneficial to improving the mixing effect. Then, the motor 5 is started, and the output shaft of the motor 5 drives the stirring shaft 301 to rotate. The spiral blades 303 continuously lift the slurry upward during the rotation, so that it circulates up and down in the vessel body 1. At the same time, the spiral blades 304 further agitate the slurry, so that the slurry is fully mixed in the vessel body 1. The L-shaped scraper 302 rotates with the stirring shaft 301 and can scrape off the slurry on the inner wall of the vessel body 1 to prevent the slurry from sticking to the wall, thereby improving the mixing effect. During the stirring process, temperature sensor 11 monitors the temperature of the mixture inside the vessel 1 in real time and transmits the temperature signal to controller 9. If the temperature is lower than the set value, controller 9 activates heating element 10 to heat the vessel 1. pH meter 12 monitors the pH value of the mixture inside the vessel 1 in real time and transmits the pH value signal to controller 9 to adjust the acidity or alkalinity of the mixture in a timely manner. Pressure sensor 7 monitors the pressure inside the vessel 1 in real time and transmits the data to controller 9 to ensure that the pressure inside the vessel 1 is within a safe range. This invention, through the design of the stirring mechanism and feeding assembly, can achieve efficient and uniform mixing, thereby ensuring the quality and performance of lithium battery cathode materials.

[0023] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A temperature-controlled mixing and stirring vessel for lithium battery cathode materials, characterized in that: The lithium battery cathode material temperature-controlled mixing and stirring vessel includes a vessel body (1), a top cover (2), a stirring mechanism (3), a feeding assembly (4), a motor (5), a discharge port (8), and a controller (9). The vessel body (1) is a hollow structure with a discharge port (8) with a valve switch at the bottom. The top cover (2) is installed on the top of the vessel body (1) through a flange. A spiral stirring mechanism (3) is installed inside the vessel body (1). The stirring mechanism (3) includes a stirring shaft (301), an L-shaped scraper (302), a spiral blade (303), a propeller blade (304), and a connecting plate (305). The top of the stirring shaft (301) is installed on the top cover (2) through a bearing. The stirring shaft (301) is provided with a spiral blade (303) for lifting the slurry. The connecting plate (305) is evenly installed on the stirring shaft (301) along the circumferential direction. One end of the L-shaped scraper (302) is installed on the end of the connecting plate (305), and the other end is installed on the stirring shaft (301). The bottom end of the shaft (301) and the scraping end of the L-shaped scraper (302) are in contact with the inner wall of the vessel body (1). Two propeller blades (304) for stirring the slurry are installed between the L-shaped scraper blades (302). The controller (9) is installed on the side wall of the vessel body (1). The motor (5) is installed on the top cover (2) and electrically connected to the controller (9). The output shaft of the motor (5) is connected to the stirring shaft (301) for transmission. Two sets of feeding assemblies (4) are installed inside the vessel body (1). The component (4) is located directly above the stirring mechanism (3). The feeding component (4) includes a feeding pipe (401), an annular guide pipe (402), and a diversion pipe (403). The annular guide pipe (402) is uniformly provided with diversion pipes (403) along the circumferential direction, and the upper and lower diversion pipes (403) are inserted into each other. The diversion pipe (403) is provided with feeding holes at equal intervals along the axial direction. One end of the feeding pipe (401) passes through the vessel body (1) and is connected to the annular guide pipe (402).

2. The lithium battery positive electrode material temperature-controlled mixing and stirring vessel as described in claim 1, characterized in that: The vessel body (1) is provided with an insulation shell (6) on the outside. An interlayer cavity is formed between the insulation shell (6) and the outer wall of the vessel body (1). An electric heating tube (10) is coiled on the outer wall of the vessel body (1) inside the interlayer cavity. The electric heating tube (10) is electrically connected to the controller (9).

3. The lithium battery positive electrode material temperature-controlled mixing and stirring vessel as described in claim 2, characterized in that: The bottom of the vessel body (1) is equipped with a temperature sensor (11) and a pH meter (12) for measuring the mixture inside. The top cover (2) is equipped with a pressure sensor (7). The temperature sensor (11), pH meter (12) and pressure sensor (7) are all electrically connected to the controller (9).

4. A lithium battery positive electrode material temperature-controlled mixing and stirring vessel as described in claim 1 or 3, characterized in that: The top cover (2) is provided with an air inlet valve (102) and an air outlet valve (102). The air outlet valve (102) is connected to the vacuum pump through a pipe, and the vacuum pump is electrically connected to the controller (9).

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