A lithium battery cathode slurry turnover tank

Abstract

This invention discloses a lithium battery cathode slurry transfer tank, belonging to the technical field of lithium battery cathode materials. The tank's stirring mechanism includes a conveying component and a guide component fitted outside the conveying component. The conveying component includes a connecting shaft, the top end of which is fixedly connected to the rotating shaft of a stirring motor. From bottom to top, a first auger, a first stirring rod, and a second auger are sequentially fixedly connected to the surface of the connecting shaft. The guide component includes a connecting pipe, a first flow guide shroud, and a second flow guide shroud. The connecting pipe is fitted outside the connecting shaft to which the first stirring rod is fixedly connected. The first flow guide shroud is conical, with its smallest diameter end fixedly connected to the lower end of the connecting pipe. The second flow guide shroud is inverted conical, with its smallest diameter end fixedly connected to the upper end of the connecting pipe. Because the guide component gradually narrows from the top and bottom to the middle, the slurry is subjected to cyclical compression by the guide component during flow, thus preventing slurry agglomeration. The rotation of the first stirring rod further breaks up any agglomerates, reducing the probability of agglomeration.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery cathode material technology, specifically relating to a lithium battery cathode slurry turnover tank. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] As a core raw material in lithium battery manufacturing, the positive electrode slurry is applied to the cathode during lithium battery production. Its performance and quality directly affect the overall performance of the lithium battery. Therefore, the stability and safety requirements for the storage, transportation, and handling of the lithium battery positive electrode slurry are extremely high. This necessitates specific containers for storing the slurry, namely, transfer tanks. Currently, transfer tanks typically use stirring mechanisms to agitate the slurry and prevent clumping, while filtration devices collect clumps or impurities. However, these filters are prone to clogging and require manual cleaning, increasing production costs.

[0004] For example, patent CN 213595080 U discloses a lithium battery cathode slurry transfer tank. This device, during slurry storage, uses an inlet, outlet, and lifting auger to transport the slurry from the bottom inner wall of the tank to the top, preventing sedimentation or clumping on the bottom inner wall and ensuring effective slurry storage. A collection frame filters impurities or poorly processed materials from the slurry. However, during operation, as the device continues to work, clumps filtered by the filter structure gradually accumulate, eventually clogging it. Although the structure can be disassembled for cleaning, manual cleaning is still required, increasing the difficulty of using the device.

[0005] For example, patent CN 203826479 U discloses a lithium battery cathode slurry storage tank. This device uses a vacuum pump to evacuate the storage tank, removing water vapor from the air along with the air itself, ensuring a low humidity level inside the tank. This effectively prevents the cathode slurry temporarily stored in the tank from becoming damp, thus ensuring that the performance of the cathode slurry stored in the tank is not affected. Although the vacuum structure improves the storage period of the slurry, it cannot prevent slurry clumping. When personnel need to retrieve the slurry, the device is likely to become clogged, requiring time to clean the clogged parts. The device is also relatively difficult to use. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a lithium battery cathode slurry turnover tank. This device, through the arrangement of a stirring element, can circulate and crush clumps in the slurry, reducing the probability of slurry clumping and making the discharge of liquid from the device smoother.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] In a first aspect, the present invention provides a lithium battery cathode slurry transfer tank, comprising a transfer tank body, a stirring motor disposed on the top of the transfer tank body, and a stirring mechanism disposed vertically inside the transfer tank body, wherein the stirring mechanism comprises a conveying component and a guide component sleeved outside the conveying component.

[0009] The conveying component includes a connecting shaft, the top end of which is fixedly connected to the rotating shaft of the stirring motor. The surface of the connecting shaft includes a first auger, a first stirring rod, and a second auger, which are fixedly connected from bottom to top.

[0010] The guide includes a connecting pipe, a first guide shroud, and a second guide shroud. The connecting pipe is sleeved on the outside of a connecting shaft to which a first stirring rod is fixedly connected. The first guide shroud is conical, with its smallest diameter end fixedly connected to the lower end of the connecting pipe. The second guide shroud is an inverted cone, with its smallest diameter end fixedly connected to the upper end of the connecting pipe.

[0011] In some embodiments of the present invention, the top of the turnover tank body is provided with a feed pipe and the bottom is provided with a discharge pipe.

[0012] In some embodiments of the present invention, the feed pipe is provided with a first valve and the discharge pipe is provided with a second valve.

[0013] In some embodiments of the present invention, the side wall of the turnover tank body is provided with an observation window and the bottom is provided with a support leg.

[0014] In some embodiments of the present invention, a first connecting pipe and a second connecting pipe are provided on the side wall of the turnover tank body. Both the first connecting pipe and the second connecting pipe are connected to the interior of the turnover tank body. A level pipe for displaying the slurry level inside the turnover tank body is provided between the first connecting pipe and the second connecting pipe.

[0015] In some embodiments of the present invention, the length of the connecting tube is less than or equal to the length of the connecting shaft on which the first stirring rod is fixedly connected.

[0016] In some embodiments of the present invention, a filter plate is fixedly connected inside the communicating tube, and a connecting shaft to which a first stirring rod is fixedly connected rotatably passes through the filter plate.

[0017] In some embodiments of the present invention, a second stirring rod is fixedly connected to the inner surface of the connecting tube.

[0018] In some embodiments of the present invention, the second stirring rod is symmetrically arranged above and below the filter plate.

[0019] In some embodiments of the present invention, the first stirring rod is vertically fixed to the surface of the connecting shaft, and the second stirring rod is vertically fixed to the inner surface of the connecting pipe. The first stirring rod and the second stirring rod are parallel to each other and do not contact each other.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention provides a lithium battery positive electrode slurry turnover tank. The stirring mechanism includes a conveying component and a guide component sleeved outside the conveying component. The stirring component is used to stir the slurry to prevent agglomeration. When the slurry is added into the turnover tank body, the conveying component is driven to rotate by a stirring motor. The first auger, the first stirring rod, and the second auger on the connecting shaft rotate. The first auger drives the slurry in the first guide shroud to move upward, so that the slurry circulates from the bottom of the turnover tank to the connecting pipe. Since the diameter of the first guide shroud gradually decreases through the connecting pipe, it squeezes the slurry, thereby breaking up the agglomerates in the slurry. The rotation of the first stirring rod further breaks up the agglomerates. After the slurry is crushed, it moves into the second guide shroud and is driven upward by the rotation of the second auger. Finally, it moves to the outside of the second guide shroud and falls to the bottom of the turnover tank body, thus circulating and preventing the slurry inside the tank from agglomerating.

[0022] This invention features a filter plate inside the connecting pipe for filtration. As the slurry moves within the connecting pipe, the filter plate filters the slurry. Meanwhile, the first stirring rod rotates, and the slurry is pulverized by the first and second stirring rods, further reducing the likelihood of slurry clumping. This allows the transfer tank to discharge the slurry more smoothly, preventing the filter plate from becoming clogged and unable to filter the slurry properly. No manual cleaning is required, making it convenient to use. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0024] Figure 1 This is a front view of the lithium battery positive electrode slurry turnover tank of Embodiment 1 of the present invention;

[0025] Figure 2 This is a structural diagram of the lithium battery positive electrode slurry turnover tank of Embodiment 1 of the present invention;

[0026] Figure 3 This is a structural diagram of the stirring mechanism in the lithium battery positive electrode slurry turnover tank of Embodiment 1 of the present invention;

[0027] Figure 4 This is a structural diagram of the stirring mechanism in the lithium battery positive electrode slurry turnover tank of Embodiment 2 of the present invention;

[0028] Figure 5 for Figure 4 Enlarged view of section A in the middle.

[0029] The reference numerals in the figure indicate:

[0030] 1-Transfer tank body, 11-Support leg, 12-First valve, 13-Infeed pipe, 14-Second valve, 15-Discharge pipe, 16-Observation window, 17-Tempered glass plate; 2-Stirring mechanism, 21-Guide component, 211-First flow guide shroud, 212-Connecting pipe, 213-Second flow guide shroud, 214-Second stirring rod, 215-Filter plate, 22-Conveying component, 221-Connecting shaft, 222-Second auger, 223-First stirring rod, 224-First auger; 3-Stirring motor, 4-First connecting pipe, 5-Liquid level pipe, 6-Second connecting pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0032] Example 1

[0033] Please refer to Figures 1 to 3 , Figure 1 This is a front view of the lithium battery positive electrode slurry turnover tank of Embodiment 1 of the present invention. Figure 2 This is a structural diagram of the lithium battery positive electrode slurry turnover tank of Embodiment 1 of the present invention. Figure 3 This is a structural diagram of the stirring mechanism in the lithium battery positive electrode slurry turnover tank of Embodiment 1 of the present invention.

[0034] This embodiment provides a novel lithium battery cathode slurry turnover tank, including a turnover tank body 1, a stirring motor 3 disposed on the top of the turnover tank body 1, and a stirring mechanism 2 disposed vertically inside the turnover tank body. The stirring mechanism 2 includes a conveying component 22 and a guide component 21 sleeved outside the conveying component 22.

[0035] The conveying component 22 includes a connecting shaft 221. The top end of the connecting shaft 221 is fixedly connected to the rotating shaft of the stirring motor 3. The surface (i.e., the circumferential surface) of the connecting shaft 221 is fixedly connected from bottom to top to a first auger 222, a first stirring rod 223, and a second auger 224.

[0036] The guide component 21 includes a connecting pipe 212, a first flow guide hood 211, and a second flow guide hood 213. The connecting pipe 212 is sleeved on the outside of the connecting shaft 221 on which the first stirring rod 223 is fixedly connected. The first flow guide hood 211 is conical, and its smallest diameter end is fixedly connected to the lower end of the connecting pipe 212. The second flow guide hood 213 is inverted conical, and its smallest diameter end is fixedly connected to the upper end of the connecting pipe 212.

[0037] The transfer tank body 1 is used to store lithium battery cathode slurry. The stirring mechanism 2 is used to stir the slurry to prevent clumping and to break up any clumps, ensuring the quality of the lithium battery cathode slurry. The guide member 21 restricts the flow direction of the slurry within the transfer tank, and the conveyor member 22 guides the slurry flow. By rotating, the slurry is lifted from bottom to top, stirred, and clumps broken up. The guide member 21 and the conveyor member 22 work together to compress the slurry to break up clumps, while simultaneously stirring and breaking up the clumps, reducing the likelihood of clumping. The stirring motor 3 drives the conveyor member 22 to rotate.

[0038] Specifically, in practical applications, the stirring mechanism 2 includes a conveying component 22 and a guide component 21 sleeved outside the conveying component 22. The conveying component 22 is rotatably connected to the inside of the guide component 21. The second auger 224 and the first auger 222 are located inside the second guide shroud 213 and the first guide shroud 211, respectively. When the slurry is added into the transfer tank body 1, the conveying component 22 is driven to rotate by the stirring motor 3, causing the slurry inside the transfer tank body 1 to circulate along the inside of the guide component 21. Since the guide component 21 gradually narrows from the top and bottom to the middle, the slurry is circulated and squeezed by the guide component 21 during flow, thereby preventing the slurry from clumping. This makes it easier for the device to discharge the slurry when personnel need to remove it, improving the slurry's storage period and retrieval efficiency, and reducing the difficulty of using the device.

[0039] When the slurry is added into the transfer tank, the conveyor 22 is driven to rotate by the stirring motor 3. The first auger 222, the first stirring rod 223 and the second auger 224 on the connecting shaft 221 rotate. The first auger 222 drives the slurry in the first guide shroud 211 to move upward, so that the slurry circulates from the bottom of the transfer tank to the connecting pipe 212. Since the diameter of the first guide shroud 211 gradually decreases through the connecting pipe 212, it squeezes the slurry, thereby crushing the lumps in the slurry. The rotation of the first stirring rod 223 further crushes the lumps. After the crushed slurry moves into the second guide shroud 213, it is driven to move upward by the rotation of the second auger 224. Finally, it moves to the outside of the second guide shroud 213 and falls to the bottom of the transfer tank 1, thus circulating and preventing the slurry inside the tank from clumping.

[0040] In order to improve the squeezing effect of the flow guide, the length of the connecting pipe 212 is less than or equal to the length of the connecting shaft 221 on which the first stirring rod 223 is fixedly connected.

[0041] To facilitate feeding and discharging into the turnover tank, the top of the turnover tank body 1 is equipped with a feed pipe 13, and the bottom is equipped with a discharge pipe 15. To facilitate control of the feeding and discharging rates, a first valve 12 is provided on the feed pipe 13, and a second valve 14 is provided on the discharge pipe 15. The feeding and discharging of the turnover tank are controlled by opening and closing the first valve 12 and the second valve 14.

[0042] To facilitate observation of the slurry inside the transfer tank, an observation window 16 is provided on the side wall of the transfer tank body 1, and a support leg 11 is provided at the bottom.

[0043] Understandably, a tempered glass plate 17 is installed on the observation window 16. The tempered glass plate 17 is transparent and has high strength, allowing for a clear observation of the slurry inside the transfer tank.

[0044] To facilitate observation of the amount of slurry in the transfer tank and to facilitate timely addition of lithium battery positive electrode slurry into the pipe, a first connecting pipe 4 and a second connecting pipe 6 are provided on the side wall of the transfer tank body 1. Both the first connecting pipe 4 and the second connecting pipe 6 are connected to the interior of the transfer tank body. A level pipe 5 for displaying the slurry level inside the transfer tank body 1 is provided between the first connecting pipe 4 and the second connecting pipe 6.

[0045] Understandably, the level tube 5 is a transparent tube, which can display the level of the slurry inside the transfer tank body 1 in real time. Moreover, the inside of the level tube 5 is smooth, strong, and not easily damaged.

[0046] In summary, the lithium battery cathode slurry turnover tank provided in this embodiment mainly includes a turnover tank body, a stirring motor disposed on the top of the turnover tank body, and a stirring mechanism disposed vertically inside the turnover tank body. The stirring mechanism includes a conveying component and a guide component sleeved outside the conveying component. The conveying component includes a connecting shaft, the top end of which is fixedly connected to the rotating shaft of the stirring motor. A first auger, a first stirring rod, and a second auger are fixedly connected to the surface of the connecting shaft from bottom to top. The guide component includes a connecting pipe, a first flow guide shroud, and a second flow guide shroud. The connecting pipe is sleeved outside the connecting shaft on which the first stirring rod is fixedly connected. The first flow guide shroud is conical, and its smallest diameter end is fixedly connected to the lower end of the connecting pipe. The second flow guide shroud is inverted conical, and its smallest diameter end is fixedly connected to the upper end of the connecting pipe. When the slurry is added into the transfer tank, the conveyor is driven to rotate by the stirring motor. The first auger, the first stirring rod, and the second auger on the connecting shaft rotate. The first auger drives the slurry in the first guide shroud to move upward, so that the slurry circulates from the bottom of the transfer tank to the connecting pipe. As the diameter of the first guide shroud gradually decreases through the connecting pipe, it squeezes the slurry, thereby breaking up any lumps in the slurry. The rotation of the first stirring rod further breaks up the lumps. After the slurry is broken up, it moves into the second guide shroud and is then driven upward by the rotation of the second auger. Finally, it moves to the outside of the second guide shroud and falls to the bottom of the transfer tank, thus circulating and preventing the slurry inside the tank from clumping.

[0047] Example 2

[0048] Please refer to Figures 4 to 5 , Figure 4 This is a structural diagram of the stirring mechanism in the lithium battery positive electrode slurry transfer tank of Embodiment 2 of the present invention. Figure 5 for Figure 4 Enlarged view of section A.

[0049] This embodiment provides a novel lithium battery cathode slurry transfer tank. The lithium battery cathode slurry transfer tank provided in this embodiment includes all the structures of the lithium battery cathode slurry transfer tank described in Embodiment 1, and additionally includes a second stirring rod 214 and a filter plate 215. The filter plate 215 is fixedly connected inside the connecting pipe 212, and the connecting shaft 221, on which the first stirring rod 223 is fixedly connected, rotatably passes through the filter plate 215.

[0050] It is understandable that the filter plate 215 has multiple holes to achieve the filtering function. There is a connecting hole at the center of the filter plate 215 for the connecting shaft 221 to rotate through, so as to avoid the filter plate 215 affecting the rotation of the connecting shaft 221.

[0051] To further improve the mixing and pulverizing effect, a second stirring rod 214 is fixedly connected to the inner surface of the connecting pipe 212. It can be understood that there are multiple second stirring rods 214, which are symmetrically arranged above and below the filter plate 215.

[0052] The first stirring rod 223 is vertically fixed to the surface of the connecting shaft 221, and the second stirring rod 214 is vertically fixed to the inner surface of the connecting pipe 212. The first stirring rod 223 and the second stirring rod 214 are parallel to each other and do not contact each other.

[0053] Understandably, multiple first stirring rods 223 are provided, and the multiple first stirring rods 223 can be fixedly connected in a ring array. The multiple first stirring rods 223 can be located between the second guide shroud 213 and the first guide shroud 211, and the first stirring rods 223 are located inside the connecting pipe 212.

[0054] This embodiment further improves the mixing and pulverizing effect of the conveying component by setting up a filter plate and a second stirring rod. When the slurry moves in the connecting pipe, it is filtered by the filter plate, and the first stirring rod rotates, pulverizing the slurry by the first and second stirring rods, further reducing the probability of slurry clumping, allowing the transfer tank to discharge the slurry more smoothly, avoiding the filter plate from clogging and failing to filter the slurry properly, eliminating the need for manual cleaning, and making it convenient to use.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lithium battery positive electrode slurry transfer tank, comprising a transfer tank body, a stirring motor disposed on the top of the transfer tank body, and a stirring mechanism disposed vertically inside the transfer tank body, characterized in that, The stirring mechanism includes a conveying component and a guide component sleeved on the outside of the conveying component; The conveying component includes a connecting shaft, the top end of which is fixedly connected to the rotating shaft of the stirring motor, and a first auger, a first stirring rod, and a second auger are fixedly connected to the surface of the connecting shaft from bottom to top. The guide includes a connecting pipe, a first guide shroud, and a second guide shroud. The connecting pipe is sleeved on the outside of the connecting shaft on which the first stirring rod is fixedly connected. The first guide shroud is conical, and its smallest diameter end is fixedly connected to the lower end of the connecting pipe. The second guide shroud is inverted conical, and its smallest diameter end is fixedly connected to the upper end of the connecting pipe. The length of the connecting pipe is less than or equal to the length of the connecting shaft on which the first stirring rod is fixedly connected; A filter plate is fixedly connected inside the connecting pipe, and the connecting shaft rotatably passes through the filter plate; a second stirring rod is fixedly connected to the inner surface of the connecting pipe; the first stirring rod is vertically fixed to the surface of the connecting shaft, and the second stirring rod is vertically fixed to the inner surface of the connecting pipe, with the first stirring rod and the second stirring rod being parallel to each other and not in contact.

2. The lithium battery positive electrode slurry transfer tank as described in claim 1, characterized in that, The top of the turnover tank body is equipped with a feed pipe, and the bottom is equipped with a discharge pipe.

3. The lithium battery positive electrode slurry transfer tank as described in claim 2, characterized in that, The feed pipe is equipped with a first valve, and the discharge pipe is equipped with a second valve.

4. The lithium battery positive electrode slurry transfer tank as described in claim 1, characterized in that, The turnover tank body is provided with an observation window on the side wall and a support leg at the bottom.

5. The lithium battery positive electrode slurry transfer tank as described in claim 1, characterized in that, The side wall of the turnover tank body is provided with a first connecting pipe and a second connecting pipe, both of which are connected to the inside of the turnover tank body. A level pipe for displaying the slurry level inside the turnover tank body is provided between the first connecting pipe and the second connecting pipe.

6. The lithium battery positive electrode slurry transfer tank as described in claim 1, characterized in that, The second stirring rod is symmetrically arranged above and below the filter plate.

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