Negative electrode slurry sampling device

Abstract

The utility model relates to a negative electrode slurry sampling device and relates to the technical field of lithium batteries, in order to solve the problem that sampling is affected by dry and hard slurry, the negative electrode slurry sampling device comprises a support, a sampling tank is arranged on the support, a stirring mechanism used for stirring the slurry is arranged on the support, and the top of the sampling tank is communicated with a sampling pipe; the sampling tube is communicated with a sampling port, the sampling port is arranged below the sampling tube, an anti-caking mechanism is arranged in the sampling tube, the anti-caking mechanism comprises an auxiliary piston and an operating rod, the auxiliary piston is arranged in the sampling tube in a sliding manner, the operating rod is connected to the end part of the auxiliary piston, and the auxiliary piston is arranged in the sampling tube. A sealing cover is arranged at the end opening, far away from the sampling tank, of the sampling pipe, and a through hole allowing the operating rod to penetrate through is formed in the sealing cover. The sampling device has the effects of removing residual slurry in the sampling pipe, reducing the risk that the sampling opening is blocked and improving the sampling efficiency and stability.

Description

Technical Field

[0001] The present application relates to the technical field of lithium batteries, and in particular to a negative electrode slurry sampling device. Background Art

[0002] With the continuous advancement of energy technology, lithium batteries, as efficient energy storage and conversion devices, have been widely used in various electronic products and electric vehicles. The performance of lithium batteries depends to a large extent on the performance of their negative electrode materials. Among them, the negative electrode graphite slurry is the main component of the negative electrode of lithium batteries. Its quality stability and uniformity are crucial to the overall performance of lithium batteries. The preparation process of negative electrode graphite slurry involves multiple process links, among which sampling is a key step to ensure the quality of the slurry.

[0003] Related technology: After sampling the negative electrode graphite slurry of the lithium battery, the slurry in the sampling tube stagnates and does not flow, resulting in drying. The dried slurry will block the sampling port, making the next sampling difficult. Auxiliary tools are usually required to clear the sampling port, which not only increases the complexity and time cost of sampling, but also may introduce impurities due to improper clearing, affecting the progress and quality of sampling, so it needs to be improved. Utility Model Content

[0004] In order to solve the problem of slurry drying affecting sampling, the present application provides a negative electrode slurry sampling device.

[0005] The negative electrode slurry sampling device provided in this application adopts the following technical solution:

[0006] A negative electrode slurry sampling device comprises a bracket, a sampling tank is arranged on the bracket, a stirring mechanism for stirring the slurry is arranged on the bracket, a sampling tube is connected to the top of the sampling tank, a sampling port is connected to the sampling tube, the sampling port is arranged below the sampling tube, an anti-knotting mechanism is arranged in the sampling tube, the anti-knotting mechanism comprises an auxiliary piston and an operating rod, the auxiliary piston is slidably arranged in the sampling tube, the operating rod is connected to the end of the auxiliary piston, a cover is arranged at the port of the sampling tube away from the sampling tank, and a through hole is opened on the cover for the operating rod to pass through.

[0007] After sampling the negative electrode graphite slurry of the lithium battery, the slurry in the sampling tube stagnates and does not flow, resulting in drying. The dried slurry will block the sampling port, making the next sampling difficult. Auxiliary tools are usually required to dredge the sampling port, which not only increases the complexity and time cost of sampling, but also may introduce impurities due to improper dredging. By adopting the above technical solution, the sampling tank is installed on the bracket, the sampling tube is connected to the sampling tank, the sampling port is connected to the sampling tube, and the anti-caking mechanism includes an auxiliary piston and an operating rod. When sampling the negative electrode graphite slurry, the operating rod is pulled, the auxiliary piston slides in the sampling tube and makes the auxiliary piston located behind the sampling port. The slurry enters the sampling tube and flows out along the sampling port. After the sampling is completed, the operating rod is pushed in the reverse direction, and the auxiliary piston is pushed to the port of the sampling tube close to the sampling tank to ensure that no slurry remains in the sampling tube and the progress of the next sampling is ensured. The sampling process is simplified and the complexity of the operation is reduced by setting the sampling tube, the sampling port, the auxiliary piston and the operating rod, and the residual slurry in the sampling tube is effectively removed, thereby reducing the possibility of slurry stagnating and not flowing in the sampling tube and causing drying and clogging, and reducing the risk of the sampling port being blocked, thereby improving the efficiency and stability of sampling, while reducing the possibility of the introduction of impurities affecting the slurry quality, and ensuring the purity and accuracy of the sampling.

[0008] Optionally, a mounting hole for mounting a piston rod is formed through the auxiliary piston, a key slot is formed at the end of the operating rod, the key slot is arranged along the length direction of the operating rod, and a key block for matching with the key slot is arranged on the inner wall of the mounting hole of the auxiliary piston.

[0009] By adopting the above technical solution, the operating rod is installed in the mounting hole of the auxiliary piston rod, and the key block is adapted to the key slot; through the setting of the mounting hole, the key slot and the key block, the connection strength and stability between the auxiliary piston and the operating rod can be enhanced, the possibility of accidental falling off or loosening of the operating rod can be reduced, and the smoothness of operation can be improved.

[0010] Optionally, a plurality of sealing rings are arranged on the outer wall of the auxiliary piston, and a plurality of sealing grooves for installing the sealing rings are opened on the auxiliary piston, and the sealing grooves are arranged along the circumferential direction of the auxiliary piston.

[0011] By adopting the above technical solution, a sealing ring is sleeved on the auxiliary piston, and the sealing ring is installed in the sealing groove; through the setting of the sealing ring and the sealing groove, an effective sealing barrier can be formed between the auxiliary piston and the inner wall of the sampling tube, thereby improving the sealing performance, effectively preventing slurry leakage, reducing the risk of slurry contamination, and ensuring the accuracy of the sampling process.

[0012] Optionally, the auxiliary piston surface is provided with a tapered portion for guiding and preventing drying, and the tapered portion is connected to an end of the auxiliary piston away from the operating rod.

[0013] By adopting the above technical solution, the tapered portion is integrally formed on the auxiliary piston; through the setting of the tapered portion, the tapered portion can guide the piston to move smoothly along the inner wall of the sampling tube, has a guiding effect, reduces the friction and resistance between the piston and the inner wall of the sampling tube, improves the smoothness of sampling, and effectively reduces the possibility of slurry drying in the sampling tube.

[0014] Optionally, a threaded portion is provided on the sealing cover, a threaded interface for connection of the threaded portion is provided at the port of the sampling tube, and a handle for pulling is provided at the end of the operating rod close to the sealing cover.

[0015] By adopting the above technical solution, the threaded portion is integrally formed on the cover, the cover is connected to the threaded interface through the threaded portion, and the handle is installed and fixed on the end of the operating rod; through the setting of the threaded portion, the threaded interface and the handle, the design of the threaded portion and the threaded interface ensures a tight connection between the cover and the sampling tube, which is convenient for installation and disassembly, and at the same time, the handle is convenient for the operator to grasp, reducing the difficulty of operation.

[0016] Optionally, an elastic skirt for preventing dust from entering is arranged in the through hole of the cover, and the operating rod passes through the elastic skirt.

[0017] By adopting the above technical solution, the elastic skirt is installed in the through hole of the cover; through the setting of the elastic skirt, dust, impurities and other external pollutants can be effectively prevented from entering the sampling tube through the through hole, ensuring the purity of the slurry during the sampling process and the accuracy of the sampling results, and having good dust and pollution prevention effects.

[0018] Optionally, the stirring mechanism includes a stirring rod, a stirring blade and a micro motor, the micro motor is connected to the bracket, the output end of the micro motor is connected to the stirring rod, the stirring rod is vertically installed in the sampling tank, and the stirring blade is connected to the stirring rod.

[0019] By adopting the above technical solution, the stirring mechanism includes a stirring rod, a stirring blade and a micro motor; when the micro motor is working, the micro motor drives the stirring rod to rotate, and the stirring blade continuously stirs the slurry in the sampling tank; through the setting of the stirring rod, the stirring blade and the micro motor, it can ensure that the slurry is stirred in all directions in the sampling tank, the slurry can be fully mixed, the occurrence of stratification and sedimentation is reduced, and the uniformity of sampling is ensured.

[0020] Optionally, the stirring blades are in multiple groups, each group of the stirring blades is provided with a collar, and the collar is sleeved and fixed on the stirring rod.

[0021] By adopting the above technical solution, the stirring blade is installed on the stirring rod through the ring; through the setting of the ring, installation and disassembly are convenient, and the stirring blade is easy to clean and maintain, which can reduce the residue and solidification of slurry on the stirring blade and keep the stirring mechanism clean and hygienic.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] The sampling process is simplified and the operation complexity is reduced by setting the sampling tube, sampling port, auxiliary piston and operating rod. The residual slurry in the sampling tube is effectively removed, thereby reducing the possibility of slurry stagnating and not flowing in the sampling tube, resulting in dryness and blockage, and reducing the risk of the sampling port being blocked, thereby improving the efficiency and stability of sampling, and reducing the possibility of impurities affecting the slurry quality, thereby ensuring the purity and accuracy of sampling;

[0024] The arrangement of the mounting hole, keyway and key block can enhance the connection strength and stability between the auxiliary piston and the operating rod, reduce the possibility of accidental falling off or loosening of the operating rod, and improve the smoothness of operation;

[0025] Through the arrangement of the threaded portion, the threaded interface and the handle, the design of the threaded portion and the threaded interface ensures a tight connection between the cover and the sampling tube, which is convenient for installation and disassembly. At the same time, the handle is convenient for operators to grasp, reducing the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a negative electrode slurry sampling device in an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of a negative electrode slurry sampling device in an embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram used to embody the anti-knotting mechanism in the embodiment of the present application.

[0029] Figure 4 for Figure 2 Enlarged view of part A in .

[0030] Explanation of the reference numerals: 1. bracket; 2. sampling tank; 3. stirring mechanism; 31. stirring rod; 32. stirring blade; 33. micro motor; 4. sampling tube; 41. threaded interface; 5. sampling port; 6. anti-knotting mechanism; 61. auxiliary piston; 611. sealing groove; 612. tapered portion; 62. operating rod; 621. keyway; 622. handle; 7. cover; 71. through hole; 72. threaded portion; 8. mounting hole; 81. key block; 9. sealing ring; 10. sleeve ring; 11. elastic skirt. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present application embodiment discloses a negative electrode slurry sampling device. Figure 1 The negative electrode slurry sampling device includes a bracket 1, on which a sampling tank 2 is installed. The sampling tank 2 has a hollow structure inside. The negative electrode graphite slurry of the lithium battery is stored in the sampling tank 2. The bottom of the sampling tank 2 is connected to a sampling tube 4, and the bottom of the sampling tube 4 is connected to a sampling port 5. The sampling port 5 is arranged at the middle section of the sampling tube 4. The sampling tube 4 is installed with an anti-caking mechanism 6. In this embodiment, the interior of the sampling tank 2 can be an inclined surface or have a corresponding pump for sampling graphite slurry; when sampling the negative electrode graphite slurry of the lithium battery, the slurry flows out from the sampling tank 2 through the sampling tube 4 and along the sampling port 5.

[0033] Reference Figure 1 and Figure 2 A stirring mechanism 3 is installed on the bracket 1, and the stirring mechanism 3 includes a stirring rod 31, a stirring blade 32 and a micro motor 33. The micro motor 33 is installed on the bracket 1, and the stirring rod 31 is installed on the output end of the micro motor 33. The stirring rod 31 is vertically arranged in the sampling tank 2. In this embodiment, there are multiple groups of stirring blades 32, and the multiple groups of stirring blades 32 are installed in sequence along the length direction of the stirring rod 31. A collar 10 is installed on each group of stirring blades 32, and the collar 10 is fixed on the stirring rod 31 to ensure that the slurry is stirred in all directions in the sampling tank 2, so that the slurry can be fully mixed, and the occurrence of stratification and precipitation is reduced, thereby ensuring the uniformity of sampling.

[0034] Reference Figure 2 and Figure 3 The anti-knotting mechanism 6 includes an auxiliary piston 61 and an operating rod 62. The auxiliary piston 61 is slidably connected in the sampling tube 4. A tapered portion 612 is integrally formed on the surface of the auxiliary piston 61. The tapered portion 612 can guide the piston to move smoothly along the inner wall of the sampling tube 4, and has a guiding effect, thereby reducing the friction and resistance between the piston and the inner wall of the sampling tube 4 and improving the smoothness of sampling.

[0035] Reference Figure 3 A plurality of sealing rings 9 are installed on the outer wall of the auxiliary piston 61. In this embodiment, the sealing rings 9 are made of elastic material. A plurality of sealing grooves 611 are opened on the auxiliary piston 61. The sealing grooves 611 are arranged along the circumferential direction of the auxiliary piston 61. In this embodiment, the plurality of sealing grooves 611 correspond to the plurality of sealing rings 9 one by one. The sealing rings 9 are sleeved and fixed in the sealing grooves 611 to form an effective sealing barrier between the auxiliary piston 61 and the inner wall of the sampling tube 4, thereby improving the sealing performance, effectively preventing the leakage of the slurry, reducing the risk of the slurry being contaminated, and ensuring the accuracy of the sampling process.

[0036] Reference Figure 3A mounting hole 8 is formed through the auxiliary piston 61, and the end of the operating rod 62 is inserted and fixed in the mounting hole 8. A key groove 621 is formed at the end of the operating rod 62, and the key groove 621 is arranged along the length direction of the operating rod 62. A key block 81 is integrally formed in the mounting hole 8 of the auxiliary piston 61, and the key block 81 is adapted to the inner wall of the key groove 621 to enhance the connection strength and stability between the auxiliary piston 61 and the operating rod 62, reduce the possibility of accidental falling off or loosening of the operating rod 62, and improve the smoothness of operation.

[0037] Reference Figure 3 A handle 622 is fixedly mounted on the end of the operating rod 62. The handle 622 is mounted on one end of the operating rod 62 away from the auxiliary piston 61. The handle 622 is convenient for the operator to grasp, thus reducing the difficulty of operation.

[0038] Reference Figure 4 A cover 7 is installed at the port of the sampling tube 4 away from the sampling tank 2. A through hole 71 is penetrated through the cover 7. In this embodiment, the through hole 71 can be used for the operating rod 62 to pass through. An elastic skirt 11 is installed in the through hole 71 of the cover 7. The operating rod 62 also passes through the elastic skirt 11. The elastic skirt 11 can be made of rubber material to effectively prevent dust, impurities and other external contaminants from entering the interior of the sampling tube 4 through the through hole 71, thereby ensuring the purity of the slurry during the sampling process and the accuracy of the sampling results, and having good dust and pollution prevention effects.

[0039] Reference Figure 4 A threaded portion 72 is integrally formed on the cover 7, and the threaded portion 72 is arranged along the circumferential direction of the cover 7. A threaded interface 41 is provided at one end of the sampling tube 4 away from the sampling tank 2, and the threaded portion 72 is adapted to the threaded interface 41; the design of the threaded portion 72 and the threaded interface 41 ensures a tight connection between the cover 7 and the sampling tube 4, which is convenient for installation and disassembly.

[0040] The implementation principle of a negative electrode slurry sampling device in an embodiment of the present application is as follows: when sampling negative electrode graphite slurry, the handle 622 of the operating rod 62 is pulled, the auxiliary piston 61 slides in the sampling tube 4 and makes the auxiliary piston 61 located behind the sampling port 5, the slurry enters the sampling tube 4 and flows out along the sampling port 5, and after the sampling is completed, the operating rod 62 is pushed in the reverse direction, and the auxiliary piston 61 is pushed to the port of the sampling tube 4 close to the sampling tank 2, so as to ensure that no slurry remains in the sampling tube 4 and ensure the progress of the next sampling; through the arrangement of the sampling tube 4, the sampling port 5, the auxiliary piston 61 and the operating rod 62, the sampling process is simplified, the complexity of the operation is reduced, and the residual slurry in the sampling tube 4 is effectively removed, thereby reducing the possibility of slurry stagnating and not flowing in the sampling tube 4 and causing dryness and blockage, and reducing the risk of the sampling port 5 being blocked, thereby improving the efficiency and stability of sampling, and at the same time reducing the possibility of the introduction of impurities affecting the slurry quality, thereby ensuring the purity and accuracy of the sampling.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A negative electrode slurry sampling device, characterized in that: The invention comprises a support (1), wherein a sampling tank (2) is arranged on the support (1), wherein a stirring mechanism (3) for stirring slurry is arranged on the support (1), wherein a sampling tube (4) is connected to the top of the sampling tank (2), wherein a sampling port (5) is connected to the sampling tube (4), wherein the sampling port (5) is arranged below the sampling tube (4), wherein an anti-knotting mechanism (6) is arranged in the sampling tube (4), wherein the anti-knotting mechanism (6) comprises an auxiliary piston (61) and an operating rod (62), wherein the auxiliary piston (61) is slidably arranged in the sampling tube (4), wherein the operating rod (62) is connected to the end of the auxiliary piston (61), and wherein a sealing cover (7) is arranged at the port of the sampling tube (4) away from the sampling tank (2), wherein a through hole (71) for the operating rod (62) to pass through is provided in the sealing cover (7).

2. A negative electrode slurry sampling device according to claim 1, characterized in that: The auxiliary piston (61) is provided with a mounting hole (8) for mounting a piston rod, the end of the operating rod (62) is provided with a key groove (621), the key groove (621) is arranged along the length direction of the operating rod (62), and a key block (81) for matching with the key groove (621) is arranged on the inner wall of the mounting hole (8) of the auxiliary piston (61).

3. The negative electrode slurry sampling device according to claim 1, characterized in that: A plurality of sealing rings (9) are arranged on the outer wall of the auxiliary piston (61), and a plurality of sealing grooves (611) for installing the sealing rings (9) are provided on the auxiliary piston (61), wherein the sealing grooves (611) are arranged along the circumferential direction of the auxiliary piston (61).

4. The negative electrode slurry sampling device according to claim 3, characterized in that: The surface of the auxiliary piston (61) is provided with a tapered portion (612) for guiding and preventing drying, and the tapered portion (612) is connected to an end of the auxiliary piston (61) away from the operating rod (62).

5. The negative electrode slurry sampling device according to claim 1, characterized in that: The sealing cover (7) is provided with a threaded portion (72), the end of the sampling tube (4) is provided with a threaded interface (41) for connection with the threaded portion (72), and the end of the operating rod (62) close to the sealing cover (7) is provided with a handle (622) for pulling.

6. The negative electrode slurry sampling device according to claim 5, characterized in that: An elastic skirt (11) for preventing dust from entering is arranged in the through hole (71) of the sealing cover (7), and the operating rod (62) passes through the elastic skirt (11).

7. The negative electrode slurry sampling device according to claim 1, characterized in that: The stirring mechanism (3) comprises a stirring rod (31), a stirring blade (32) and a micro motor (33); the micro motor (33) is connected to the bracket (1); the output end of the micro motor (33) is connected to the stirring rod (31); the stirring rod (31) is vertically installed in the sampling tank (2); and the stirring blade (32) is connected to the stirring rod (31).

8. The negative electrode slurry sampling device according to claim 7, characterized in that: The stirring blades (32) are provided in multiple groups, and each group of the stirring blades (32) is provided with a sleeve ring (10), and the sleeve ring (10) is sleeved and fixed on the stirring rod (31).

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