Pneumatic Stirring Type Mixing Kettle for Processing Lithium-Ion Battery Electrolyte

Abstract

Pneumatic stirring type mixing kettle for processing lithium-ion battery electrolyte, comprising a tank body, wherein a stirring paddle is installed inside the tank body; an exhaust mechanism is installed inside the tank body, the exhaust mechanism includes an exhaust outer pipe and an exhaust hood, the exhaust outer pipe is vertically installed at the inner side wall of the tank body, the exhaust hood is installed at the inner bottom of the tank body, the exhaust hood is located at the bottom of the stirring paddle, the exhaust outer pipe is communicated with the exhaust hood, and the exhaust outer pipe penetrates through the top surface of the tank body; the present invention utilizes the exhaust outer pipe to discharge nitrogen in the horizontal direction, thereby driving the mixed liquid to rotate and form a vortex, improving the rotation force and accelerating the mixing effect; the exhaust hood is utilized to discharge nitrogen downward, thereby driving the liquid at the bottom layer of the tank body to roll upward, realizing rapid and uniform stirring, and quickly decomposing the undissolved materials at the bottom of the kettle; nitrogen is used and will not react with the materials, which is safe and reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrolyte processing, and particularly relates to a pneumatic stirring type mixing kettle for processing lithium-ion battery electrolytes. Background Art

[0002] The electrolyte of a lithium battery is the carrier of ion transmission in the battery. It is generally composed of a lithium salt and an organic solvent. The electrolyte plays a role in conducting ions between the positive and negative electrodes of the lithium battery, and is the guarantee for the lithium-ion battery to obtain advantages such as high voltage and high specific energy; the electrolyte is generally prepared from raw materials such as high-purity organic solvents, electrolyte lithium salts, and necessary additives under certain conditions and in a certain proportion;

[0003] During the preparation of the electrolyte, a mixing kettle is required to mix various raw materials together. The current mixing kettle has the following problems: 1. The stirring range of the stirring blades is limited, and the materials deposited at the bottom cannot be stirred, and the stirring direction is single, resulting in poor final mixing effect; 2. When the configured materials are less, the stirring blades cannot effectively reach them; 3. When a power outage occurs, the equipment cannot work, affecting normal production. Summary of the Invention

[0004] In view of the deficiencies of the existing technology, the present invention provides a pneumatic stirring type mixing kettle for processing lithium-ion battery electrolytes. The specific technical solutions are as follows:

[0005] A pneumatic stirring type mixing kettle for processing lithium-ion battery electrolytes includes a tank body, and a stirring paddle is installed inside the tank body; an exhaust mechanism is installed inside the tank body, and the exhaust mechanism includes an exhaust outer pipe and an exhaust hood. The exhaust outer pipe is vertically installed on the inner side wall of the tank body, the exhaust hood is installed at the inner bottom of the tank body, the exhaust hood is located at the bottom of the stirring paddle, the exhaust outer pipe is communicated with the exhaust hood, the exhaust outer pipe penetrates through the top surface of the tank body, a second exhaust port is opened on the outer wall of the exhaust outer pipe, the second exhaust port is arranged inside the tank body, a fourth exhaust port is opened on the bottom surface of the exhaust hood, the second exhaust port is used to discharge high-pressure nitrogen to drive the mixed liquid to rotate, and the fourth exhaust port is used to discharge high-pressure nitrogen to drive the mixed liquid to roll; an exhaust valve is installed on the top surface of the tank body.

[0006] Further, the second exhaust ports are linearly arrayed from top to bottom, blades are provided on the side wall of the stirring paddle, and the second exhaust ports are staggered with the blades.

[0007] Further, the bottom surface of the exhaust hood is a spherical structure protruding downward, each of the fourth exhaust ports is perpendicular to the spherical structure, the exhaust hood and the stirring paddle are located on the same central line, and the exhaust hood is a cavity structure with an open bottom surface.

[0008] Furthermore, the exhaust mechanism also includes an inner air guide tube, which includes a first tube body, a second tube body and a third tube body, and the first tube body, the second tube body and the third tube body are an integrated hard structure; the first tube body slides through the exhaust outer tube, the first tube body is tightly fitted to the inner wall of the exhaust outer tube, and the outer wall of the first tube body is provided with a first exhaust port, the first exhaust port and the second exhaust port are staggered, the first tube body is used to move downward to block the first exhaust port, and the first tube body is used to move upward to connect the first exhaust port and the second exhaust port.

[0009] Furthermore, the top end of the first tube body is connected to a nitrogen delivery pipe, the bottom end of the first tube body is vertically connected to the second tube body, the second tube body is vertically connected to the third tube body, the third tube body and the exhaust hood are located on the same center line, the third tube body extends into the interior of the exhaust hood, the outer wall of the third tube body is provided with a third exhaust port, the third exhaust port is located inside the exhaust hood, the bottom end of the third tube body is provided with a blocking plate, the blocking plate is used for moving downward to block the fourth exhaust port, the blocking plate is used for moving upward to connect the third exhaust port and the fourth exhaust port; the blocking plate is installed inside the exhaust hood, the blocking plate adopts a spherical structure matched with the bottom surface of the exhaust hood, the coverage area of ​​the blocking plate is larger than the distribution area of ​​the fourth exhaust port, and the side of the blocking plate is spaced apart from the interior of the exhaust hood.

[0010] Furthermore, the top of the first tube body passes through the tank body, and the side wall of the first tube body is connected to an adjustment mechanism, which is arranged outside the tank body and is used to drive the inner air guide tube to move up and down.

[0011] Furthermore, the adjustment mechanism includes a positioning plate, an adjusting screw and an adjusting seat, the positioning plate is vertically arranged on the top side wall of the first tube body, the adjusting seat is vertically arranged on the top side wall of the exhaust outer tube, the adjusting screw is arranged parallel to the first tube body, the top outer wall of the adjusting screw is provided with a convex ring, and the bottom area is a threaded section, the convex ring is rotatably embedded in the interior of the positioning plate, and the threaded section cooperates and passes through the adjustment seat.

[0012] Furthermore, a first baffle is vertically provided at the top of the outer wall of the threaded segment, and the first baffle is located at the top of the adjustment seat. A second baffle is vertically provided at the bottom of the outer wall of the threaded segment, and the second baffle is located at the bottom of the adjustment seat. The first baffle and the second baffle are used to constrain the moving position of the adjusting screw.

[0013] The beneficial effects of the present invention are:

[0014] 1. The exhaust outer pipe can discharge nitrogen gas in the horizontal direction, thereby driving the mixed liquid to rotate and form a vortex, improving the rotation force and accelerating the mixing effect. The exhaust hood can discharge nitrogen gas downward, thereby driving the liquid at the bottom layer of the tank to roll upward, achieving rapid and uniform stirring, and quickly decomposing the undissolved materials at the bottom of the kettle. Using nitrogen gas will not react with the materials, which is safe and reliable.

[0015] 2. The nitrogen gas stirring method can also ensure the normal progress of the mixing work when the stirring paddle cannot work.

[0016] 3. By using the up and down movement of the inner gas guide pipe, the exhaust ports on the exhaust outer pipe and the exhaust hood can be controlled simultaneously. When not inflating, no gas will enter the exhaust mechanism, avoiding corrosion of the exhaust mechanism, and also ensuring smoother subsequent inflation without being subject to too much resistance. Brief Description of the Drawings

[0017] Figure 1 Shows the structural schematic diagram of the pneumatic stirring type mixing kettle for processing lithium-ion battery electrolyte of the present invention;

[0018] Figure 2 Shows the structural schematic diagram of the exhaust mechanism of the present invention;

[0019] Figure 3 Shows the top structural schematic diagram of the exhaust mechanism of the present invention;

[0020] Figure 4 Shows the bottom structural schematic diagram of the exhaust mechanism of the present invention;

[0021] As shown in the figure: 1. Tank body, 2. Stirring paddle, 21. Blade, 3. Exhaust mechanism, 31. Exhaust outer pipe, 311. Second exhaust port, 312. First fixing rod, 32. Inner gas guide pipe, 321. First pipe body, 3211. First exhaust port, 322. Second pipe body, 323. Third pipe body, 3231. Third exhaust port, 33. Exhaust hood, 331. Second fixing rod, 332. Fourth exhaust port, 333. Plugging plate, 4. Adjusting mechanism, 41. Positioning plate, 42. Adjusting screw, 421. First baffle, 422. Second baffle, 423. Convex ring, 43. Adjusting seat, 5. Nitrogen gas delivery hose, 51. Intake valve, 6. Exhaust valve. Detailed Description of the Invention

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0023] Pneumatic stirring type mixing kettle for processing lithium-ion battery electrolyte, including a tank body 1, wherein a stirring paddle 2 is installed inside the tank body 1; an exhaust mechanism 3 is installed inside the tank body 1, and the exhaust mechanism 3 includes an exhaust outer pipe 31 and an exhaust hood 33. The exhaust outer pipe 31 is vertically installed at the inner side wall of the tank body 1, the exhaust hood 33 is installed at the inner bottom of the tank body 1, the exhaust hood 33 is located at the bottom of the stirring paddle 2, the exhaust outer pipe 31 is communicated with the exhaust hood 33, the exhaust outer pipe 31 penetrates through the top surface of the tank body 1, a second exhaust port 311 is opened on the outer wall of the exhaust outer pipe 31, the second exhaust port 311 is arranged inside the tank body 1, a fourth exhaust port 331 is opened on the bottom surface of the exhaust hood 33. The second exhaust port 311 is used to discharge high-pressure nitrogen to drive the mixed liquid to rotate, and the fourth exhaust port 331 is used to discharge high-pressure nitrogen to drive the mixed liquid to tumble; an exhaust valve 6 is installed on the top surface of the tank body 1; the exhaust valve 6 is used to discharge nitrogen. By using the nitrogen discharged from the second exhaust port 311 and the fourth exhaust port 331 to drive the mixed liquid to rotate and tumble, the mixing and dissolving speed of the materials can be greatly increased, making the reaction more sufficient; the exhaust hood 33 can inflate and mix the mixed liquid at the bottom layer, solving the problem that the paddle cannot stir when the production volume is too small; by using the gas mixing method, even when the power is cut off and the stirring paddle stops working, the high-pressure nitrogen can be discharged normally, ensuring the normal mixing of the materials.

[0024] As an improvement of the above technical solution, the second exhaust ports 311 are linearly arrayed from top to bottom, and the linear array is used to increase the coverage range of the second exhaust ports 311;

[0025] Blades 21 are arranged on the side wall of the stirring paddle 2, and the second exhaust ports 311 are staggeredly distributed with the blades 21; the staggered distribution is used to avoid the vortex generated by the paddle from flushing against the second exhaust ports 311, ensuring the stable discharge of nitrogen from the second exhaust ports 311.

[0026] As an improvement of the above technical solution, the bottom surface of the exhaust hood 33 is a downward convex spherical structure, and the spherical structure is used to increase the coverage range and improve the tumbling effect of the mixed liquid;

[0027] Each of the fourth exhaust ports 332 is perpendicular to the spherical structure, and the perpendicular arrangement is used to make the discharged gas inclined downward, preventing the liquid from entering the exhaust hood 33;

[0028] The exhaust hood 33 and the stirring paddle 2 are located on the same central line, and the exhaust hood 33 is a cavity structure with an open bottom surface; being located on the same central line is used to ensure the stability of the whole structure.

[0029] As an improvement of the above technical solution, the exhaust mechanism 3 further includes an air guide inner tube 32, and the air guide inner tube 32 includes a first tube body 321, a second tube body 322 and a third tube body 323, and the first tube body 321, the second tube body 322 and the third tube body 323 are an integrated hard structure; the integrated hard structure is used to ensure that the three can act simultaneously, and the structural strength is higher;

[0030] The first tube body 321 slides through the exhaust outer tube 31, and the first tube body 321 fits tightly with the inner wall of the exhaust outer tube 31. The outer wall of the first tube body 321 is provided with a first exhaust port 3211, and the first exhaust port 3211 and the second exhaust port 311 are staggered. The first tube body 321 is used to move downward to block the first exhaust port 3211, and the first tube body 321 is used to move upward to connect the first exhaust port 3211 and the second exhaust port 311; the first tube body 321 is used to realize the on-off control of the first exhaust port 3211, so that when the nitrogen is not filled, the liquid in the tank body 1 will not enter the exhaust mechanism 3, so as to avoid the exhaust mechanism 3 from being corroded. If there is gas in the exhaust mechanism 3, it will be very difficult to fill the nitrogen, and the resistance is very large. Therefore, blocking the exhaust port can also eliminate the resistance encountered during the filling, so as to ensure that the nitrogen can be discharged smoothly.

[0031] The top of the first tube body 321 is connected to the nitrogen delivery pipe 5, the bottom of the first tube body 321 is vertically connected to the second tube body 322, the second tube body 322 is vertically connected to the third tube body 323, the third tube body 323 and the exhaust hood 33 are located on the same center line, the third tube body 323 extends into the interior of the exhaust hood 33, the outer wall of the third tube body 323 is provided with a third exhaust port 3231, and the third exhaust port 3231 is located inside the exhaust hood 33. A blocking plate 333 is provided at the bottom end of the third tube body 323, and the blocking plate 333 is used for moving downward to block the fourth exhaust port 332, and the blocking plate 333 is used for moving upward to connect the third exhaust port 3231 and the fourth exhaust port 332; the setting of the blocking plate 333 is also to ensure that liquid does not enter the exhaust mechanism 3 when not inflated, and the up and down movement of the air guide inner tube 32 can control the second exhaust port 311 and the fourth exhaust port 332 at the same time, making the operation easier.

[0032] As an improvement of the above technical solution, the blocking plate 333 is installed inside the exhaust hood 33. The blocking plate 333 adopts a spherical structure that matches the bottom surface of the exhaust hood 33. The blocking plate 333 adopts a spherical structure to improve the sealing performance and eliminate the sealing gap.

[0033] The covering area of ​​the blocking plate 333 is larger than the distribution area of ​​the fourth exhaust ports 332, so as to ensure that each of the fourth exhaust ports 332 can be blocked;

[0034] A space is provided between the side surface of the plugging plate 333 and the interior of the exhaust hood 33; the provision of the space is to ensure that the gas discharged from the third exhaust port 3231 can enter the fourth exhaust port 332.

[0035] As an improvement of the above technical solution, the top of the first pipe body 321 penetrates through the tank body 1, an adjusting mechanism 4 is connected to the side wall of the first pipe body 321, the adjusting mechanism 4 is arranged outside the tank body 1, and the adjusting mechanism 4 is used to drive the air guiding inner pipe 32 to move up and down.

[0036] As an improvement of the above technical solution, the adjusting mechanism 4 includes a positioning plate 41, an adjusting screw 42 and an adjusting seat 43. The positioning plate 41 is vertically arranged on the top side wall of the first pipe body 321, the adjusting seat 43 is vertically arranged on the top side wall of the exhaust outer pipe 31, the adjusting screw 42 is arranged in parallel with the first pipe body 321, a convex ring 423 is arranged on the outer wall of the top of the adjusting screw 42, and the bottom area is a threaded section. The convex ring 423 is rotationally embedded in the positioning plate 41, and the threaded section is cooperatively penetrated through the adjusting seat 43; when the convex ring 423 realizes the up and down movement of the adjusting screw 42, the air guiding inner pipe 32 can slide up and down accordingly. The threaded section is used to drive the air guiding inner pipe 32 to move up and down. The operation by means of the thread is simple and convenient, and the sealing is more tight.

[0037] As an improvement of the above technical solution, a first baffle 421 is vertically arranged on the top outer wall of the threaded section, the first baffle 421 is located on the top of the adjusting seat 43, a second baffle 422 is vertically arranged on the bottom outer wall of the threaded section, the second baffle 422 is located on the bottom of the adjusting seat 43, and the first baffle 421 and the second baffle 422 are used to restrict the moving position of the adjusting screw 42; the first baffle 421 is the limit position for the downward movement of the adjusting screw 42. At this time, the second exhaust port 311 and the fourth exhaust port 332 are plugged. The second baffle 422 is the limit position for the upward movement of the adjusting screw 42. At this time, the second exhaust port 311 and the fourth exhaust port 332 are opened.

[0038] When the present invention is implemented,

[0039] Embodiment 1:

[0040] Only the stirring paddle 2 is working, and the stirring paddle 2 drives the blade 21 to rotate to stir and mix the liquid in the tank body 1; before adding raw materials, it is necessary to rotate the adjusting screw 42 downward, and the adjusting screw 42 drives the first tube body 321 to move downward through the convex ring 423 while rotating downward, and the first tube body 321, the second tube body 322, and the third tube body 323 move downward synchronously; in the process of the downward movement of the air guide inner tube 32, the first exhaust port 3211 moves downward and is staggered with the second exhaust port 311, and the blocking plate 333 moves downward and gradually blocks the fourth exhaust port 332, and when the first baffle plate 421 and the adjusting seat 43 are fitted together, the rotation is stopped. At this time, the first exhaust port 3211 is completely staggered with the second exhaust port 311, the inner wall of the exhaust outer tube 31 blocks the first tank body 321, and the blocking plate blocks the fourth exhaust port 332, thereby preventing liquid from entering the exhaust mechanism 3.

[0041] Embodiment 2:

[0042] The stirring blade 2 and the exhaust mechanism 3 work simultaneously. Before adding raw materials, the adjusting screw 42 is rotated upward until the second baffle 422 is in contact with the adjusting seat 43 and stops. At this time, the first exhaust port 3211 moves upward to align with the second exhaust port 311, and the blocking plate 333 moves upward to be separated from the fourth exhaust port 332.

[0043] After the raw materials are added, the stirring paddle 2 and the air inlet valve 51 on the nitrogen delivery hose 51 are started, and the blade 21 drives the liquid to rotate clockwise; the nitrogen is delivered to the first tube body 321 through the nitrogen delivery pipe 5, and part of the gas is diverted to the first exhaust port 3211 in the first tube body 321, and then discharged through the second exhaust port 311, and the other nitrogen continues to move downward, enters the third tube body 323 through the second tank body 322, and is finally discharged into the exhaust hood 33 through the third exhaust port 3231, and the gas is then discharged to the fourth exhaust port 332 through the gap between the sealing plate 333 and the exhaust hood 33; the gas discharged from the second exhaust port 311 can accelerate the rotation speed and improve the rotation mixing effect, and the gas discharged from the fourth exhaust port 332 can drive the liquid to tumble; the nitrogen in the tank body 1 can be discharged through the exhaust valve 6.

[0044] Embodiment three:

[0045] When there is a power outage or the stirring paddle 2 fails or there is too little liquid for the stirring paddle 2 to reach, only nitrogen can be filled in for stirring and mixing.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic stirring type mixing kettle for processing lithium-ion battery electrolyte, comprising a tank body, and a stirring paddle is installed inside the tank body; It is characterized in that: An exhaust mechanism is installed inside the tank body. The exhaust mechanism includes an exhaust outer pipe and an exhaust hood. The exhaust outer pipe is vertically installed at the inner side wall of the tank body. The exhaust hood is installed at the inner bottom of the tank body. The exhaust hood is located at the bottom of the stirring paddle. The exhaust outer pipe is communicated with the exhaust hood. The exhaust outer pipe penetrates through the top surface of the tank body. A second exhaust port is opened on the outer wall of the exhaust outer pipe. The second exhaust port is arranged inside the tank body. A fourth exhaust port is opened on the bottom surface of the exhaust hood. The second exhaust port is used to discharge high-pressure nitrogen to drive the mixed liquid to rotate. The fourth exhaust port is used to discharge high-pressure nitrogen to drive the mixed liquid to tumble; Therefore, an exhaust valve is installed on the top surface of the tank body; The second exhaust ports are linearly arrayed from top to bottom. Blades are arranged on the side wall of the stirring paddle. The second exhaust ports are staggered with the blades; The bottom surface of the exhaust hood is a spherical structure protruding downward. Each of the fourth exhaust ports is perpendicular to the spherical structure. The exhaust hood and the stirring paddle are located on the same central line. The exhaust hood is a cavity structure with an open bottom surface; The exhaust mechanism further includes a gas guiding inner pipe. The gas guiding inner pipe includes a first pipe body, a second pipe body and a third pipe body. The first pipe body, the second pipe body and the third pipe body are of an integral rigid structure; The first pipe body slidably penetrates through the exhaust outer pipe. The first pipe body is in close fit with the inner wall of the exhaust outer pipe. A first exhaust port is opened on the outer wall of the first pipe body. The first exhaust port is staggered with the second exhaust port. The first pipe body is used to move downward to block the first exhaust port. The first pipe body is used to move upward to communicate the first exhaust port and the second exhaust port; The top end of the first pipe body is communicated with a nitrogen delivery pipe. The bottom end of the first pipe body is vertically communicated with the second pipe body. The second pipe body is vertically communicated to the third pipe body. The third pipe body and the exhaust hood are located on the same central line. The third pipe body extends into the exhaust hood. A third exhaust port is arranged on the outer wall of the third pipe body. The third exhaust port is located inside the exhaust hood. A blocking plate is arranged at the bottom end of the third pipe body. The blocking plate is used to move downward to block the fourth exhaust port. The blocking plate is used to move upward to communicate the third exhaust port and the fourth exhaust port.

2. The pneumatic stirring type mixing kettle for processing lithium-ion battery electrolyte according to claim 1, It is characterized in that: The blocking plate is installed inside the exhaust hood. The blocking plate adopts a spherical structure matching the bottom surface of the exhaust hood. The covering area of the blocking plate is larger than the distribution area of the fourth exhaust port. A gap is arranged between the side surface of the blocking plate and the inside of the exhaust hood.

3. The pneumatic stirring type mixing kettle for processing lithium-ion battery electrolyte according to claim 1, It is characterized in that: The top of the first pipe body penetrates through the tank body, and an adjusting mechanism is connected to the side wall of the first pipe body. The adjusting mechanism is arranged outside the tank body and is used to drive the inner air guide pipe to move up and down.

4. The pneumatic stirring type mixing kettle for processing lithium ion battery electrolyte according to claim 3, characterized in that: The adjusting mechanism includes a positioning plate, an adjusting screw and an adjusting seat. The positioning plate is vertically arranged on the top side wall of the first pipe body, the adjusting seat is vertically arranged on the top side wall of the exhaust outer pipe, the adjusting screw is arranged in parallel with the first pipe body, a convex ring is arranged on the outer wall of the top of the adjusting screw, and the bottom area is a threaded section. The convex ring is rotationally embedded in the positioning plate, and the threaded section is cooperatively penetrated through the adjusting seat.

5. The pneumatic stirring type mixing kettle for processing lithium ion battery electrolyte according to claim 4, characterized in that: A first baffle is vertically arranged on the top outer wall of the threaded section, the first baffle is located on the top of the adjusting seat, a second baffle is vertically arranged on the bottom outer wall of the threaded section, the second baffle is located on the bottom of the adjusting seat, and the first baffle and the second baffle are used to restrict the moving position of the adjusting screw.

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