Slurry mixing device for lithium battery production

Abstract

The utility model discloses a kind of slurry mixing equipment for lithium battery production, including agitator tank, agitator tank top is equipped with top cover, further include: stirring mechanism, stirring mechanism is located in the inside of agitator tank, stirring mechanism includes rotating rod, rotating rod top is fixedly connected with fixed pillar, rotating rod is cylindrical shape, rotating rod outside is around with connecting rod, connecting rod between being equipped with stirring rod, the side of connecting rod close to agitator tank inner wall is equipped with sleeve, sleeve is hollow cylindrical shape, sleeve is tangent with agitator tank inner wall, by the setting of sleeve and agitator tank inner wall tangency, can make sleeve scrape slurry adhered in agitator tank inner wall when rotating, while stirring rod can increase the contact area between slurry, agitator tank can uniformly stir slurry with higher viscosity, high viscosity slurry is not easy to adhere in agitator tank inner wall, and slurry with high viscosity is not easy to form in agitator tank inside, can uniformly stir slurry.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, and in particular to a slurry mixing device for lithium battery production. Background Technology

[0002] Lithium-ion batteries, invented by Edison, are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. In the past, because lithium metal is chemically very reactive, and the requirements for processing, storage, and use are very high, lithium-ion batteries were not widely used for a long time. With the development of modern science, lithium-ion batteries have now become mainstream. The production of lithium-ion batteries requires mixing the slurry to make the reaction between the various raw materials more complete, so specialized mixing equipment is required.

[0003] A search revealed a utility model patent in China, CN210522360U, which discloses a slurry mixing device for lithium battery production. The device comprises a mixing drum, a stirring rod, and a cleaning device. The cleaning device is located on the outside of the mixing drum. An inlet pipe is connected to an external water supply device, and a water pump is activated to draw external cleaning water, which is then transported to an outlet pipe and flows through a U-shaped pipe into a hollow ring. When the water in the hollow ring reaches a certain volume, it is sprayed outwards through the outlet hole. Simultaneously, rotating the handle drives the lead screw to rotate, and the slider slides vertically downwards under the combined action of the lead screw and the sliding groove. The slider also moves the top plate, outlet pipe, U-shaped pipe, and hollow ring downwards, thereby achieving the effect of the cleaning rod brushing the inner wall of the mixing drum. This, combined with the water sprayed from the outlet hole, cleans the inner wall of the mixing drum quickly, preventing residues from causing corrosion and damage.

[0004] A search revealed a utility model patent (CN208287852U) for lithium battery production, which discloses a slurry mixing device, including a mixing tank, a stirring motor, a stirring shaft, and a filter screen. The mixing tank has an opening at the top with a cover plate and a through hole in the center. A filter screen is embedded in the cover plate along the inner circumference of the through hole. A powder pipe is positioned directly above the filter screen. An inclined block is located inside the mixing tank. The slurry is stirred within the mixing tank, which is situated on the inclined surface of the inclined block. A stirring shaft is installed inside the mixing tank, with one end penetrating the tank wall and connected to an external stirring motor. An observation window is located on one side wall of the mixing tank. A slurry pipe is connected to one side of the mixing tank and is equipped with a flow meter. A discharge port is located at the bottom of the mixing tank. This utility model allows for the stirring of powder and slurry on the inclined block inside the tank, and the stirring shaft enables timely discharge of the mixed slurry, significantly improving the mixing efficiency.

[0005] However, in the existing technology, the mixing tank cannot uniformly mix slurries with high viscosity. High viscosity slurries tend to stick to the inner wall of the mixing tank and tend to clump inside the mixing tank, resulting in uneven mixing. At the same time, the slurry is prone to freezing in low temperature environments, making it impossible to mix evenly, which makes it impractical.

[0006] To address these issues, we propose a slurry mixing device for lithium battery production. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a slurry mixing device for lithium battery production.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A slurry mixing device for lithium battery production includes a mixing tank, the top of which is provided with a top cover, and further includes:

[0010] The motor is located at the top of the top cover, and a fixed support is provided at the bottom of the motor. The fixed support passes through the top cover and is inserted into the interior of the mixing tank.

[0011] A stirring mechanism is provided inside the stirring tank. The stirring mechanism includes a rotating rod, the top end of which is fixedly connected to the fixed support column. The rotating rod is cylindrical in shape. A connecting rod is arranged around the outside of the rotating rod. A stirring rod is arranged between the connecting rods. A sleeve is provided on the side of the connecting rod near the inner wall of the stirring tank. The sleeve is hollow and cylindrical in shape. The sleeve is tangent to the inner wall of the stirring tank. A heating rod is fixedly installed inside the sleeve.

[0012] More preferably, the connecting rods are arranged perpendicular to each other on the horizontal plane, and the bottom end of the rotating rod does not contact the bottom end of the mixing tank.

[0013] More preferably, the stirring rod is arc-shaped, hollow, and has a groove in the middle for the passage of slurry.

[0014] More preferably, the bottom end of the sleeve does not contact the bottom and top ends of the mixing tank, and the top end of the heating rod is flush with the top surface of the mixing tank.

[0015] More preferably, the bottom of the mixing tank is provided with support bases on both sides, the cross-section of the support bases is L-shaped, and the support bases are fixedly connected to the mixing tank by screws.

[0016] More preferably, the top cover is connected to the mixing tank by a snap-fit ​​mechanism, the top cover is detachable, and the top cover has a handle at its upper end, which is symmetrically arranged with the motor as the center.

[0017] More preferably, the top of the top cover is provided with a filling port, the filling port is located on both sides of the handle, and the bottom end of the filling port penetrates the top cover and is inserted into the interior of the mixing tank.

[0018] More preferably, an exhaust valve is provided on the side of the top cover opposite to the injection port, and the bottom end of the exhaust valve penetrates through the top cover and is inserted into the interior of the mixing tank.

[0019] More preferably, the bottom of the mixing tank is provided with a discharge pipe, the discharge pipe is provided with a valve, the bottom end of the mixing tank is provided with a round hole, and the top end of the discharge pipe is located at the round hole.

[0020] More preferably, the motor has a connecting post at its bottom end, the bottom end of the connecting post is fixedly connected to the rotating rod, and the connecting post is arranged around the outside of the fixed support.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. By setting the sleeve to be tangential to the inner wall of the mixing tank, the sleeve can scrape the slurry adhering to the inner wall of the mixing tank when rotating. At the same time, the stirring rod can increase the contact area between itself and the slurry. The mixing tank can uniformly stir slurries with high viscosity. High viscosity slurries are not easy to stick to the inner wall of the mixing tank, and high viscosity slurries are not easy to clump inside the mixing tank, so the slurry can be stirred evenly.

[0023] 2. By setting up a heating rod, the slurry is easy to freeze in low-temperature environments. The heating rod can heat and thaw the frozen slurry, so that it can be stirred evenly, which is highly practical. Attached Figure Description

[0024] Figure 1 This is a structural diagram of a slurry mixing device for lithium battery production proposed in this utility model;

[0025] Figure 2 This is an internal structural diagram of a slurry mixing device for lithium battery production proposed in this utility model;

[0026] Figure 3 for Figure 2 Schematic diagram of the stirring mechanism;

[0027] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0028] Figure 5 for Figure 3Enlarged schematic diagram of the structure at point B;

[0029] In the diagram: 1. Mixing tank; 2. Support base; 3. Top cover; 4. Motor; 5. Inlet; 6. Handle; 7. Exhaust valve; 8. Discharge pipe; 9. Mixing mechanism; 10. Rotating rod; 11. Connecting rod; 12. Mixing rod; 13. Sleeve; 14. Heating rod; 15. Fixed support column; 16. Connecting column. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] refer to Figure 1 The slurry is poured into the mixing tank 1 and stirred inside. The positive electrode slurry of the lithium battery is composed of binder, conductive agent, positive electrode material, etc., while the negative electrode slurry is composed of binder, graphite carbon powder, etc. The slurry needs to be fully stirred and mixed before it can be used. The relevant technology of the mixing tank 1 is disclosed in the Chinese patent publication number CN210522360U, which will not be elaborated here. The top of the mixing tank 1 is provided with a top cover 3, which can seal the mixing tank 1 to prevent the slurry from overflowing.

[0032] refer to Figure 1 The motor 4 is located at the top of the top cover 3. The motor 4 can drive the stirring mechanism 9 to rotate, thereby realizing the function of stirring and mixing the slurry. The bottom of the motor 4 is provided with a fixed support column 15. The fixed support column 15 passes through the top cover 3 and is inserted into the mixing tank 1. The fixed support column 15 is used to connect the rotating rod 10 and the motor 4. The fixed support column 15 is made of solid stainless steel, which has good corrosion resistance and can prevent the slurry from corroding the fixed support column 15.

[0033] refer to Figure 2 and Figure 3 The stirring mechanism 9 is located inside the mixing tank 1 and is used to stir the slurry. The stirring mechanism 9 includes a rotating rod 10, the top end of which is fixedly connected to the fixed support column 15. The rotating rod 10 is cylindrical. The motor 4 drives the rotating rod 10 to rotate. A connecting rod 11 is provided around the outside of the rotating rod 10. The connecting rod 11 is used to connect the rotating rod 10 and the sleeve 13. When the rotating rod 10 rotates, it can synchronously drive the sleeve 13 to rotate inside the mixing tank 1.

[0034] refer to Figure 2 and Figure 3A stirring rod 12 is provided between the connecting rods 11. The stirring rod 12 can fully stir the slurry in the center of the mixing tank 1. A sleeve 13 is provided on the side of the connecting rod 11 near the inner wall of the mixing tank 1. The sleeve 13 can fit and fix the heating rod 14. At the same time, the sleeve 13 is made of aluminum-magnesium alloy, which can facilitate the conduction of heat by the heating rod 14.

[0035] refer to Figure 2 and Figure 3 The sleeve 13 is a hollow cylinder used to house the heating rod 14. The sleeve 13 is tangential to the inner wall of the mixing tank 1. By setting the sleeve 13 tangential to the inner wall of the mixing tank 1, the sleeve 13 can scrape the slurry adhering to the inner wall of the mixing tank 1 when rotating. At the same time, the stirring rod 12 can increase the contact area between itself and the slurry. The mixing tank 1 can uniformly stir slurries with high viscosity. High-viscosity slurries are less likely to adhere to the inner wall of the mixing tank 1, and they are less likely to clump inside the mixing tank 1, thus ensuring uniform stirring of the slurry.

[0036] refer to Figure 2 and Figure 3 A heating rod 14 is fixedly installed inside the sleeve 13. By setting the heating rod 14, the slurry is easy to freeze in low temperature environment. The heating rod 14 can heat and thaw the frozen slurry. The sleeve 13 is made of aluminum-magnesium alloy, which can facilitate the conduction of heat by the heating rod 14, so that it can be stirred evenly and has strong practicality.

[0037] refer to Figure 3 The connecting rods 11 are arranged perpendicularly to each other on the same horizontal plane. The fact that the connecting rods 11 are perpendicular to each other on the same horizontal plane indicates that there are 4 connecting rods 11 surrounding the rotating rod 10, so that they can evenly cover every part of the inside of the mixing tank 1. The bottom end of the rotating rod 10 does not contact the bottom end of the mixing tank 1, so it will not block the discharge hole at the bottom end of the mixing tank 1, and the mixing tank 1 can discharge smoothly.

[0038] refer to Figure 3 The stirring rod 12 is arc-shaped. Compared with the upright stirring rod 12, the arc-shaped stirring rod 12 experiences less force at various points. The arc shape can form an effective buffer, which can improve the service life of the stirring rod 12. The stirring rod 12 is hollow, which can increase the contact area between the stirring rod 12 and the slurry. It can achieve uniform stirring. There is a groove in the middle of the stirring rod 12 for the slurry to pass through. Even high viscosity slurry can pass through smoothly after being stirred in the middle of the stirring rod 12. This prevents a single stirring rod 12 from receiving excessive force, which can improve the service life of the stirring rod 12.

[0039] refer to Figure 3 and Figure 4The bottom end of the sleeve 13 does not contact the bottom or top end of the mixing tank 1, which can prevent scratching the bottom end of the mixing tank 1. At the same time, a gap is opened at the bottom end of the mixing tank 1 to facilitate the outflow of slurry. The top end of the heating rod 14 is flush with the top surface of the mixing tank 1. The heating rod 14 can replace the sleeve 13 to stir the slurry at the top of the mixing tank 1. At the same time, an aluminum-magnesium alloy protective sleeve can be provided on the outside of the heating rod 14 to prevent the heating rod 14 from being corroded. The heating rod 14 is powered by the motor 4. The motor 4 is located in the guide, passes through the rotating rod 10, the connecting rod 11 and the sleeve 13 and is connected to the heating rod 14 to realize the power supply of the heating rod 14. The motor 4 is connected to an external power source for drive.

[0040] refer to Figure 1 The mixing tank 1 has support bases 2 on both sides of its bottom end. The support bases 2 are used to support the mixing tank 1. The cross-section of the support base 2 is L-shaped. The L shape has good stability and can stably support the mixing tank 1. The support base 2 is fixedly connected to the mixing tank 1 by screws, which facilitates installation and disassembly and maintenance.

[0041] refer to Figure 1 The top cover 3 is connected to the mixing tank 1 by a snap-fit. The top cover 3 is detachable. The inside of the mixing tank 1 can be rinsed and cleaned by removing the top cover 3. The top cover 3 is equipped with a handle 6 at the top. The top cover 3 can be removed more easily by using the handle 6. The handle 6 is symmetrically arranged with the motor 4 as the center, making it convenient for the user to remove the top cover 3.

[0042] refer to Figure 1 The top of the top cover 3 is provided with a filling port 5, which is located on both sides of the handle 6. The bottom end of the filling port 5 penetrates the top cover 3 and is inserted into the inside of the mixing tank 1. Various raw materials that make up the slurry are fed into the mixing tank 1 through the filling port 5 for mixing. Different slurries can be added from different filling ports 5 to prevent various raw materials from affecting each other.

[0043] refer to Figure 1 An exhaust valve 7 is provided on the side of the top cover 3 opposite to the filling port 5. The bottom end of the exhaust valve 7 penetrates the top cover 3 and is inserted into the inside of the mixing tank 1. Gas will be generated during the mixing of the slurry. The exhaust valve 7 can be used to discharge the gas from the mixing tank 1, which can prevent the mixing tank 1 from exploding due to excessive gas pressure.

[0044] refer to Figure 1 The bottom of the mixing tank 1 is provided with a discharge pipe 8, and a valve is provided on the discharge pipe 8. By opening and closing the valve, the slurry that has been mixed can be discharged out of the discharge pipe 8. A round hole is opened at the bottom of the mixing tank 1, and the top of the discharge pipe 8 is located at the round hole, so that the slurry in the mixing tank 1 can be discharged out of the discharge pipe 8. The bottom of the mixing tank 1 is curved to facilitate the flow of slurry. The valve can be a suction valve to facilitate the discharge of slurry in the mixing tank 1.

[0045] refer to Figure 5 The motor 4 has a connecting post 16 at the bottom, and the bottom end of the connecting post 16 is fixedly connected to the rotating rod 10. The connecting post 16 is arranged around the outside of the fixed support 15. The connecting post 16 can connect the rotating rod 10 and the rotor part at the bottom of the motor 4, which can improve the stability of the rotating rod 10.

[0046] Furthermore, when the terms "first," "second," "third," etc., are used in this application specification to describe various features, these terms are only used to distinguish these features and should not be construed as indicating or implying the correlation or relative importance between features or implicitly indicating the number of features indicated.

[0047] In addition, this application specification describes exemplary embodiments by referring to idealized exemplary cross-sectional views and / or plan views and / or perspective views. Therefore, differences from the illustrated shapes are foreseeable due to factors such as manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but should include deviations in shape caused, for example, by manufacturing processes. Thus, the regions shown in the figures are substantially schematic, and their shapes are not intended to illustrate the actual shapes of the regions of the device, nor to limit the scope of the exemplary embodiments.

Claims

1. A slurry mixing device for lithium battery production, comprising a mixing tank (1), wherein the top of the mixing tank (1) is provided with a top cover (3), characterized in that, Also includes: The motor (4) is located at the top of the top cover (3), and the bottom of the motor (4) is provided with a fixed support (15). The fixed support (15) passes through the top cover (3) and is inserted into the interior of the mixing tank (1). A stirring mechanism (9) is located inside the stirring tank (1). The stirring mechanism (9) includes a rotating rod (10). The top end of the rotating rod (10) is fixedly connected to the fixed support column (15). The rotating rod (10) is cylindrical. A connecting rod (11) is arranged around the outside of the rotating rod (10). A stirring rod (12) is arranged between the connecting rods (11). A sleeve (13) is provided on the side of the connecting rod (11) near the inner wall of the stirring tank (1). The sleeve (13) is hollow cylindrical. The sleeve (13) is tangent to the inner wall of the stirring tank (1). A heating rod (14) is fixedly installed inside the sleeve (13).

2. The slurry mixing equipment for lithium battery production according to claim 1, characterized in that, The connecting rods (11) are arranged perpendicular to each other on the horizontal plane, and the bottom end of the rotating rod (10) does not contact the bottom end of the mixing tank (1).

3. The slurry mixing equipment for lithium battery production according to claim 1, characterized in that, The stirring rod (12) is arc-shaped and hollow, with a groove in the middle for the slurry to pass through.

4. The slurry mixing equipment for lithium battery production according to claim 1, characterized in that, The bottom end of the sleeve (13) does not contact the bottom and top of the mixing tank (1), and the top end of the heating rod (14) is flush with the top surface of the mixing tank (1).

5. The slurry mixing equipment for lithium battery production according to claim 1, characterized in that, The mixing tank (1) has a support base (2) on both sides of its bottom end. The cross-section of the support base (2) is L-shaped. The support base (2) is fixedly connected to the mixing tank (1) by screws.

6. The slurry mixing equipment for lithium battery production according to claim 1, characterized in that, The top cover (3) is connected to the mixing tank (1) by a snap-fit. The top cover (3) is detachable. The top cover (3) has a handle (6) at the upper end. The handle (6) is symmetrically arranged with the motor (4) as the center.

7. The slurry mixing equipment for lithium battery production according to claim 1, characterized in that, The top of the top cover (3) is provided with a filling port (5), which is located on both sides of the handle (6). The bottom end of the filling port (5) penetrates the top cover (3) and is inserted into the mixing tank (1).

8. The slurry mixing equipment for lithium battery production according to claim 7, characterized in that, An exhaust valve (7) is provided on the side of the top cover (3) opposite to the injection port (5). The bottom end of the exhaust valve (7) passes through the top cover (3) and is inserted into the mixing tank (1).

9. A slurry mixing device for lithium battery production according to claim 1, characterized in that, The bottom of the mixing tank (1) is provided with a discharge pipe (8), the discharge pipe (8) is provided with a valve, the bottom of the mixing tank (1) is provided with a round hole, and the top of the discharge pipe (8) is located at the round hole.

10. A slurry mixing device for lithium battery production according to claim 1, characterized in that, The motor (4) is provided with a connecting column (16) at the bottom end. The bottom end of the connecting column (16) is fixedly connected to the rotating rod (10). The connecting column (16) is arranged around the outside of the fixed support column (15).

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