A slurry storage tank for battery coating

Abstract

The utility model provides a kind of slurry storage tank for battery coating, comprising: base, the left and right sides of the top of base are evenly installed with support frame, the top of support frame is provided with fixed ring;Tank body, the inboard of fixed ring is fixedly connected with tank body, the bottom of tank body inner chamber is provided with filter screen;Tank cover;Stirring assembly;The slurry storage tank for battery coating, by stirring shaft in the process of rotation simultaneously drive linear stirring rod, bending type stirring vane and agitating mechanism are three kinds of shapes to the slurry in tank body inner chamber are simultaneously stirred, greatly shorten stirring time, to directly improve overall production efficiency, in tank build up complex and efficient flow field and shear field, ensure that each component in slurry can be more fully, more evenly mixed and distributed, effectively enhance the uniformity of stirring, significantly reduce the generation of bubble, agglomerate and other defects, further improve the quality and stability of slurry.

Description

Technical Field

[0001] This utility model relates to the field of battery coating technology, and in particular to a slurry storage tank for battery coating. Background Technology

[0002] Battery coating refers to the method of coating a paste polymer, molten polymer, or polymer solution onto a thin film to obtain a composite film. The coating process is an essential step in the lithium battery production process. It is the next step after the preparation of the slurry. The main purpose of this step is to uniformly coat the positive and negative electrode sheets with a slurry that has good stability, good viscosity, and good fluidity.

[0003] During coating, the slurry must be uniformly dispersed. If it is not well dispersed during the coating process, it will significantly affect the areal density and thickness of the coated electrodes, severely impacting battery assembly, capacity distribution, and battery vehicle consistency. Stirring rods are usually installed in the coating tank to agitate the slurry. However, relying solely on a single stirring rod may not generate sufficient shear force and turbulence, easily leading to stirring blind zones. This results in some slurry not being fully mixed, affecting the overall uniformity of the slurry. Due to limited stirring effect, active materials, conductive agents, binders, and other components in the slurry may not be completely and uniformly dispersed in the solvent to form a stable suspension. This can lead to inconsistent coating thickness and significant performance differences during coating, thus affecting the overall battery performance and yield. It may also cause defects such as bubbles and agglomerates in the slurry, all of which reduce slurry quality. Bubbles may burst during coating, forming pinhole defects, while agglomerates may clog the coating head, affecting coating efficiency and quality.

[0004] To address this, a slurry storage tank for battery coating is proposed. Utility Model Content

[0005] In view of this, the present invention provides a slurry storage tank for battery coating to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0006] The technical solution of this utility model is implemented as follows: a battery coating slurry storage tank, comprising:

[0007] The base has support frames installed on both the left and right sides of its top, and the top of each support frame has a fixing ring.

[0008] The tank body is fixedly connected to the inner side of the fixing ring, and a filter screen is provided at the bottom of the inner cavity of the tank body;

[0009] A can lid is provided on the top of the can body, and the upper surface of the fixing ring has a cylinder for lifting the can lid;

[0010] A stirring assembly is located in the inner cavity of the tank. The stirring assembly includes a stirring shaft, a straight stirring rod, and bent stirring blades. The stirring shaft is rotatably connected to the top of the inner cavity of the tank cover. The straight stirring rod and the bent stirring blades are arranged sequentially along the axial direction of the stirring shaft.

[0011] A stirring mechanism is located at the lower end of the stirring shaft to agitate the slurry.

[0012] It facilitates opening and closing the tank lid, allowing for the addition of slurry into the tank. During slurry mixing, the slurry in the tank cavity is simultaneously stirred in three forms: a straight stirring rod, a bent stirring blade, and a stirring mechanism, significantly shortening the mixing time. At the same time, the filter screen filters out impurities and particles in the slurry, improving the uniformity of the slurry.

[0013] More preferably, the stirring mechanism includes a connecting box, a driving gear, a driven gear, and a movable stirring plate. The connecting box is fixed to the bottom of the stirring shaft, the driving gear is located in the middle of the inner cavity of the connecting box, two driven gears are provided and symmetrically distributed along the driving gear, and a movable stirring plate is connected to one side of the driven gear through a shaft.

[0014] This facilitates better agitation of the material at the bottom of the tank, reduces material stratification, and improves the mixing effect.

[0015] More preferably, the inner surface of the movable stirring plate is provided with a plurality of through holes of the same size and evenly distributed.

[0016] It facilitates stirring and uses through holes as a pressure relief channel to help reduce the pressure on the moving stirring plate.

[0017] More preferably, the bottom left and right sides of the connecting box are equipped with fixed mounting seats, and the inner cavity of the mounting seat is equipped with a snap-fit ​​scraper through a clamping rod, and the outer side of the scraper is in contact with the inner wall of the tank.

[0018] This helps to keep the inner wall of the tank clean.

[0019] More preferably, the agitation mechanism further includes a stepper motor, which is fixedly connected to the top of the inner cavity of the connecting box, and the output end of the stepper motor is fixedly connected to the middle end of the top of the drive gear.

[0020] It facilitates the driving of the stirring plate to perform active stirring.

[0021] More preferably, L-shaped connecting plates are fixedly connected to both the left and right sides of the top of the can lid, and the output end of the cylinder is fixedly connected to the bottom of the L-shaped connecting plates.

[0022] This facilitates the connection between the can lid and the cylinder.

[0023] More preferably, a slot is provided on the outer side of the top of the tank, and a retaining ring is installed on the outer side of the bottom of the tank cover, the retaining ring being engaged in the inner cavity of the slot.

[0024] Easy to locate.

[0025] More preferably, the stirring assembly further includes a servo motor for driving the stirring shaft to rotate, the servo motor being fixedly connected to the middle of the top of the tank lid, and the output end of the servo motor being fixedly connected to the top of the stirring shaft.

[0026] More preferably, springs are fixedly connected to the bottom of both the left and right sides of the inner wall of the tank, and card holders are fixedly connected to the top of the springs. Card blocks are installed on both the left and right sides of the bottom of the filter screen. The filter screen is mounted on the top of the card holders, and the card blocks are engaged in the inner cavity of the card holders.

[0027] It facilitates the disassembly and assembly of the filter, improving the convenience of later maintenance.

[0028] More preferably, the bottom of the tank is connected to a discharge pipe, and the surface of the discharge pipe is provided with a discharge valve, and a discharge trough is provided through the middle of the inner surface of the base.

[0029] The present invention has the following advantages due to the adoption of the above technical solution:

[0030] I. This utility model simultaneously stirs the slurry in the tank cavity by rotating a stirring shaft, which drives a linear stirring rod, a bent stirring blade, and a stirring mechanism in three forms. This significantly shortens the stirring time, thereby directly improving the overall production efficiency. It constructs a complex and efficient flow field and shear force field inside the tank, ensuring that the components in the slurry are more fully and evenly mixed and distributed, effectively enhancing the uniformity of stirring. This not only promotes the optimization of the physical and chemical properties of the slurry but also significantly reduces the generation of defects such as bubbles and lumps, further improving the quality and stability of the slurry. At the same time, due to the dual improvement in stirring efficiency and quality, the number of downtime cleanings and equipment failure rate are significantly reduced, thereby effectively reducing maintenance costs.

[0031] II. This utility model uses a stirring shaft to drive a connecting box to rotate during rotation. The connecting box drives a movable stirring plate to rotate around the stirring shaft, thus stirring the slurry. At the same time, the output of a stepper motor drives a drive gear to rotate. During rotation, the drive gear uses the meshing of its teeth to drive the driven gears on both sides to rotate. The driven gears drive the movable stirring plate to rotate. This dynamic mixing method can further promote the mixing of particles and liquid components in the slurry, making the stirring more thorough.

[0032] Third, this utility model extends upward through the output end of the cylinder and moves the tank cover upward through the L-shaped connecting plate, which can lift the stirring component upward, making it convenient to clean the tank and stirring component later. By setting a scraper, the inner wall of the tank can be cleaned during the stirring process to prevent the slurry from sticking to the wall. By setting an installation base, the scraper can be disassembled for cleaning or replacement. By setting a filter screen, impurities and particles in the slurry can be filtered to ensure that the slurry maintains a high degree of uniformity during the coating process. At the same time, it can remove tiny particles and air bubbles in the slurry, thereby reducing defects and pinholes on the coating surface during the subsequent coating process.

[0033] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of this utility model;

[0036] Figure 2 This is a structural schematic diagram of the present invention in cross-section;

[0037] Figure 3 This is a schematic diagram of the structure of the can lid in the raised state of this utility model;

[0038] Figure 4 This is a schematic diagram of the stirring mechanism of this utility model;

[0039] Figure 5 This is a structural diagram of the card holder and filter screen of this utility model in their disassembled state.

[0040] Reference numerals: 1. Base; 11. Support frame; 12. Fixing ring; 13. Material chute; 14. Cylinder; 2. Tank body; 21. Discharge pipe; 22. Slot; 23. Filter screen; 24. Spring; 25. Slot seat; 26. Slot block; 3. Tank cover; 31. L-shaped connecting plate; 32. Snap ring; 4. Stirring assembly; 41. Servo motor; 42. Stirring shaft; 43. Linear stirring rod; 44. Bending stirring blade; 45. Connecting box; 46. Mounting base; 47. Scraper; 48. Agitation mechanism; 481. Drive gear; 482. Driven gear; 483. Movable stirring plate; 484. Through hole; 485. Stepper motor. Detailed Implementation

[0041] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0042] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0043] like Figure 1-5 As shown, this utility model embodiment provides a battery coating slurry storage tank, including a base 1, a tank body 2, a tank cover 3, and a stirring assembly 4. Support frames 11 are fixedly connected to the left and right sides of the top of the base 1. A fixed ring 12 is fixedly connected to the top of the support frame 11. Cylinders 14 are fixedly connected to the left and right sides of the top of the fixed ring 12. The tank body 2 is fixedly connected to the inner side of the fixed ring 12. The tank cover 3 is located on the top of the tank body 2. L-shaped connecting plates 31 are fixedly connected to the left and right sides of the top of the tank cover 3. The output end of the cylinder 14 is fixedly connected to the bottom of the L-shaped connecting plate 31. A slot 22 is provided on the outer side of the top of the tank body 2. A retaining ring 32 is fixedly connected to the outer side of the bottom of the tank cover 3. The retaining ring 32 engages in the inner cavity of the slot 22. A discharge pipe 21 is connected to the bottom of the tank body 2, and a discharge valve is provided on the surface of the discharge pipe 21. A discharge trough 13 is provided through the middle of the inner surface of the base 1.

[0044] according to Figure 3 and Figure 4As shown, in one embodiment, a stirring assembly 4 is located in the inner cavity of the tank 2. The stirring assembly 4 includes a stirring shaft 42, a linear stirring rod 43, and a bent stirring blade 44. The stirring shaft 42 is rotatably connected to the top of the inner cavity of the tank cover 3. The linear stirring rod 43 and the bent stirring blade 44 are arranged sequentially along the axial direction of the stirring shaft 42. A stirring mechanism 48 is disposed at the lower end of the stirring shaft 42 to agitate the slurry. The stirring mechanism 48 includes a connecting box 45, a driving gear 481, a driven gear 482, and a movable stirring plate 483. The connecting box 45 is fixed to the bottom of the stirring shaft 42. The driving gear 481 is located in the middle of the inner cavity of the connecting box 45. Two driven gears 482 are provided and symmetrically distributed along the driving gear 481. One side of the driven gear 482 is connected to a shaft. The container 48 is equipped with a movable stirring plate 483, the inner surface of which has multiple through holes 484 of the same size and evenly distributed. Mounting seats 46 are fixedly connected to the left and right sides of the bottom of the connecting box 45. A scraper 47 is mounted inside the mounting seat 46 via a locking rod. The outer side of the scraper 47 contacts the inner wall of the tank 2. The stirring mechanism 48 also includes a stepper motor 485, which is fixedly connected to the top of the inner cavity of the connecting box 45. The output end of the stepper motor 485 is fixedly connected to the middle of the top of the drive gear 481. The stirring assembly 4 also includes a servo motor 41 for driving the stirring shaft 42 to rotate. The servo motor 41 is fixedly connected to the middle of the top of the tank cover 3, and the output end of the servo motor 41 is fixedly connected to the top of the stirring shaft 42.

[0045] In this embodiment, the linear stirring rod 43 can provide uniform shear force along its length, which helps to disperse large particles or clumps in the slurry and improve stirring efficiency. Its linear shape can reduce dead corners in the stirring process, ensuring that the slurry can be effectively stirred in all directions, avoiding the impact of insufficient stirring in some areas on the slurry quality. Due to its special shape, the bent stirring blade 44 can generate a multi-directional flow effect in the stirring process, which helps the slurry to mix at different levels, improves the uniformity of stirring, and more effectively prevents the components in the slurry from stratifying due to density differences, ensuring the overall consistency of the slurry. The stirring mechanism 48 can perform dynamic movements in the stirring process, further promoting the mixing of particles and liquid components in the slurry, making the stirring more thorough. The scraper 47 can clean the inner wall of the tank 2 in the stirring process, preventing the slurry from sticking to the wall.

[0046] according to Figure 2 and Figure 5As shown, in one embodiment, a filter screen 23 is provided at the bottom of the inner cavity of the tank body 2, and springs 24 are fixedly connected to the bottom of the left and right sides of the inner wall of the tank body 2. A card seat 25 is fixedly connected to the top of the springs 24, and a card block 26 is installed on the left and right sides of the bottom of the filter screen 23. The filter screen 23 is mounted on the top of the card seat 25, and the card block 26 is engaged in the inner cavity of the card seat 25.

[0047] In this embodiment, by setting the filter screen 23, impurities and particles in the slurry can be filtered out, ensuring that the slurry maintains a high degree of uniformity during the coating process. At the same time, it can remove tiny particles and air bubbles in the slurry, thereby reducing defects and pinholes on the coating surface during subsequent coating processes. By setting the mounting bracket 25 and the mounting block 26, it is convenient to disassemble the filter screen 23 for cleaning or replacement. By setting the spring 24, the filter screen 23 can be driven to generate a certain vibration amplitude during the overall operation, effectively improving the filtration efficiency.

[0048] In operation, this invention works as follows: First, with the lid 3 raised, the slurry is injected into the inner cavity of the tank 2 for storage. During storage, the output of the servo motor 41 drives the stirring shaft 42 to rotate. Simultaneously, the stirring shaft 42 drives the linear stirring rod 43 and the bent stirring blade 44 to rotate, providing double stirring of the slurry. At the same time, the stirring shaft 42 drives the connecting box 45 to rotate, which in turn drives the movable stirring plate 483 to rotate around the stirring shaft 42. Simultaneously, the output of the stepper motor 485 drives the drive gear 481 to rotate. During the process, the meshing of the teeth drives the driven gears 482 on both sides to rotate. The driven gears 482 drive the movable stirring plate 483 to rotate. During the stirring process, dynamic action is performed to further promote the mixing of particles and liquid components in the slurry, making the mixing more thorough. During the rotation of the movable stirring plate 483, the slurry can pass through more easily through the through hole 484, thereby increasing the contact area between the movable stirring plate 483 and the slurry. It also serves as a pressure relief channel, helping to reduce the pressure on the movable stirring plate 483 and improve the safety and stability of the equipment.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A battery coating slurry storage tank, characterized in that, include: The base (1) has support frames (11) installed on both the left and right sides of the top of the base (1), and the top of the support frame (11) is provided with a fixing ring (12). The tank (2) is fixedly connected to the inner side of the fixing ring (12), and a filter screen (23) is provided at the bottom of the inner cavity of the tank (2); The can lid (3) is located on the top of the can body (2), and the upper surface of the fixing ring (12) has a cylinder (14) for lifting the can lid (3); A stirring assembly (4) is located in the inner cavity of the tank (2). The stirring assembly (4) includes a stirring shaft (42), a straight stirring rod (43), and a bent stirring blade (44). The stirring shaft (42) is rotatably connected to the top of the inner cavity of the tank cover (3). The straight stirring rod (43) and the bent stirring blade (44) are arranged sequentially along the axial direction of the stirring shaft (42). A stirring mechanism (48) is provided at the lower end of the stirring shaft (42) to agitate the slurry.

2. The battery coating slurry storage tank according to claim 1, characterized in that: The stirring mechanism (48) includes a connecting box (45), a driving gear (481), a driven gear (482), and a movable stirring plate (483). The connecting box (45) is fixed to the bottom of the stirring shaft (42). The driving gear (481) is located in the middle of the inner cavity of the connecting box (45). There are two driven gears (482) and they are symmetrically distributed along the driving gear (481). The movable stirring plate (483) is connected to one side of the driven gear (482) through a shaft.

3. The battery coating slurry storage tank according to claim 2, characterized in that: The inner surface of the movable stirring plate (483) is provided with a plurality of through holes (484) of the same size and evenly distributed.

4. A battery coating slurry storage tank according to claim 2, characterized in that: The bottom left and right sides of the connecting box (45) are equipped with fixed mounting bases (46). The inner cavity of the mounting base (46) is equipped with a snap-fit ​​scraper (47) through a clamping rod. The outer side of the scraper (47) is in contact with the inner wall of the tank (2).

5. A battery coating slurry storage tank according to claim 2, characterized in that: The stirring mechanism (48) also includes a stepper motor (485), which is fixedly connected to the top of the inner cavity of the connecting box (45), and the output end of the stepper motor (485) is fixedly connected to the middle end of the top of the drive gear (481).

6. A battery coating slurry storage tank according to claim 1, characterized in that: The left and right sides of the top of the can lid (3) are both fixedly connected to L-shaped connecting plates (31), and the output end of the cylinder (14) is fixedly connected to the bottom of the L-shaped connecting plate (31).

7. A battery coating slurry storage tank according to claim 1, characterized in that: The outer side of the top of the tank (2) is provided with a slot (22), and the outer side of the bottom of the tank cover (3) is provided with a fixedly connected retaining ring (32), which is engaged in the inner cavity of the slot (22).

8. A battery coating slurry storage tank according to claim 1, characterized in that: The stirring assembly (4) also includes a servo motor (41) for driving the stirring shaft (42) to rotate. The servo motor (41) is fixedly connected to the middle of the top of the tank cover (3), and the output end of the servo motor (41) is fixedly connected to the top of the stirring shaft (42).

9. A battery coating slurry storage tank according to claim 1, characterized in that: Springs (24) are fixedly connected to the bottom of the left and right sides of the inner wall of the tank (2). A card seat (25) is fixedly connected to the top of the spring (24). Card blocks (26) are installed on the left and right sides of the bottom of the filter screen (23). The filter screen (23) is mounted on the top of the card seat (25), and the card blocks (26) are engaged in the inner cavity of the card seat (25).

10. A battery coating slurry storage tank according to claim 1, characterized in that: The bottom of the tank (2) is connected to a discharge pipe (21), and a discharge valve is provided on the surface of the discharge pipe (21). A discharge trough (13) is provided through the middle of the inner surface of the base (1).

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