Slurry defoaming device
By designing a slurry defoaming device including a storage tank, a bubble absorbing unit and a defoaming cylinder, the problem of difficulty in eliminating bubbles during the coating of lithium-ion battery separator is solved, and efficient defoaming of the slurry is achieved and improved Product quality and utilization rate.
Patent Information
- Application Number
- CN202421133877.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-23
AI Technical Summary
Prior Art During the coating process of lithium-ion battery separator, bubbles in the slurry are difficult to effectively eliminate, resulting in bright spots on the separator and affecting product quality.
A slurry defoaming device is designed, including a storage tank, a foaming unit and a foaming cylinder. The bubble suction unit sucks the bubble through the bubble suction tube and the bubble blow structure, and forms a negative pressure through the blowing port to allow the bubbles to enter the defoaming cylinder. The spiral blades and raised structures in the defoaming cylinder help the bubbles burst.
Effectively reduce bubbles in the slurry, improve slurry utilization, ensure product quality, reduce manual defoaming workload, and reduce production costs.
Smart Images
Figure CN222427220U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of defoaming devices, in particular to a slurry defoaming device. Background Art
[0002] With the continuous development of science and technology, lithium-ion batteries have gradually developed in the direction of high safety, lightness, and high energy density. As one of the four main materials of lithium-ion batteries, the current commercialized separators are mainly polyolefin separators (PP or PE). However, their heat resistance and electrolyte wettability are poor and cannot meet the requirements of new batteries. To solve the above problems, it is necessary to add a heat-resistant coating to the base film to form a coated separator. However, bubbles will be generated during the use of the slurry. These bubbles cause more bright spots on the separator during the coating process, affecting product quality.
[0003] Therefore, it is particularly important to eliminate bubbles in the slurry. The general method is to add a defoaming agent to the slurry or to perform static vacuum defoaming. When the amount of defoaming agent added is small, the defoaming ability is limited and a large number of small bubbles cannot be eliminated, and the existing problem cannot be solved. Adding a large amount of defoaming agent will affect the performance of the diaphragm. As for the static vacuum defoaming method, since the reflux liquid and stirring are always going on during the coating process, bubbles are constantly generated, and the vacuum rate is not enough to meet the use requirements.
[0004] Therefore, a slurry defoaming device is urgently needed to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a slurry defoaming device, which can break bubbles in the slurry, realize the defoaming of the slurry, improve the utilization rate of the slurry, and ensure the product quality.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A slurry defoaming device is provided, comprising:
[0008] Storage tank, used to store slurry;
[0009] The bubble suction unit comprises a bubble suction tube and a bubble blowing structure connected in sequence, wherein one end of the bubble suction tube away from the bubble blowing structure is connected to the top of the material storage tank and communicated with the material storage tank, the bubble blowing structure is provided with a plurality of bubble blowing channels, the air inlet of the bubble blowing channel is communicated with the bubble suction tube, the bubble suction tube is further connected with an air blowing port, the air blowing port is provided between the material storage tank and the bubble blowing structure, and the air blowing port can blow air toward the bubble blowing structure;
[0010] The defoaming cylinder is connected to the air outlet of the bubbling channel, and the defoaming cylinder is also connected to the material storage tank.
[0011] As an optional solution of the slurry defoaming device, a plurality of the bubbling channels are provided, and the inner diameters of the plurality of bubbling channels gradually increase from the air inlet to the air outlet.
[0012] As an optional solution of the slurry defoaming device, the material storage tank further includes a telescopic tube, which is connected to an end of the bubble suction tube away from the bubble blowing structure.
[0013] As an optional solution of the slurry defoaming device, the defoaming cylinder includes spiral blades, and the spiral blades extend downward around the axis of the defoaming cylinder.
[0014] As an optional solution of the slurry defoaming device, a protruding structure is provided on the inner wall of the defoaming cylinder.
[0015] As an optional solution of the slurry defoaming device, an exhaust hole is provided on the top of the defoaming cylinder.
[0016] As an optional solution for the slurry defoaming device, the upper side of the defoaming cylinder is connected to the bubbling channel, and the lower side of the defoaming cylinder is set as a conical structure, and the cross-section of the conical structure gradually decreases from top to bottom.
[0017] As an optional solution of the slurry defoaming device, the storage tank includes a top cover and a tank body, the top cover covers the top of the tank body, the top cover includes a first part and a second part, the first part is used to install the bubble absorption unit and the defoaming cylinder, and the second part is rotatably connected to the first part.
[0018] As an optional solution of the slurry defoaming device, the storage tank further includes a stirring device, and the stirring device includes a rotating blade and a driving motor, and the driving motor can drive the rotating blade to rotate in the storage tank.
[0019] As an optional solution of the slurry defoaming device, it also includes a moving mechanism, which is arranged at the bottom of the storage tank.
[0020] Beneficial effects of the utility model:
[0021] The utility model provides a slurry defoaming device, comprising a storage tank, a bubble suction unit and a defoaming cylinder. The slurry is stored in the storage tank, and the bubble suction unit comprises a bubble suction tube and a bubble blowing structure connected in sequence, the air suction port of the bubble suction tube is connected to the top of the storage tank, the air inlet of the bubble blowing structure is connected to the bubble suction tube, and the bubble blowing structure is provided with a plurality of bubble blowing channels. The air blowing port can blow air toward the bubble blowing structure, and the flow of bubbles in the bubble blowing structure causes negative pressure in the bubble suction tube, so that the bubbles in the storage tank can enter the bubble suction tube. After the bubbles flow into the bubble blowing channel, the viscosity between the slurry forming the bubbles and the side wall of the bubble blowing channel is utilized, so that the bubbles gradually expand during the process of the air blowing port continuously blowing air toward the bubble blowing structure. The air outlet of the bubble blowing channel is connected to the defoaming cylinder, and the expanded bubbles collide with the inner wall of the defoaming cylinder after entering the defoaming cylinder to break and become slurry, and finally the slurry in the defoaming cylinder flows into the storage tank for subsequent work. The slurry defoaming device can reduce bubbles in the slurry, improve the quality of the slurry product, and prevent defects such as bright spots from being generated when the slurry is coated, resulting in poor appearance and scrapped workpieces; by absorbing bubbles floating on the surface of the slurry, it avoids the waste caused by the accumulation of bubbles overflowing the storage tank, and reduces the workload of manual defoaming, thereby improving the utilization rate of the slurry and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the internal structure of the slurry defoaming device provided by the utility model;
[0023] Figure 2 It is a structural schematic diagram of the slurry defoaming device provided by the utility model;
[0024] Figure 3 It is an enlarged schematic diagram of the bubble blowing structure provided by the utility model.
[0025] In the figure:
[0026] 1. Storage tank; 11. Top cover; 111. First part; 112. Second part; 12. Tank body; 13. Telescopic tube;
[0027] 2. Bubble suction unit; 21. Bubble suction tube; 211. Air blowing port; 22. Bubble blowing structure; 221. Bubble blowing channel;
[0028] 3. Defoaming cylinder; 31. Exhaust hole;
[0029] 4. Mobile mechanism. DETAILED DESCRIPTION
[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0033] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0034] like Figures 1 to 3 As shown, the slurry defoaming device of this embodiment includes a storage tank 1, a bubble suction unit 2 and a defoaming cylinder 3. The storage tank 1 is used to store slurry. The bubble suction unit 2 includes a bubble suction tube 21 and a bubble blowing structure 22 connected in sequence. The end of the bubble suction tube 21 away from the bubble blowing structure 22 is connected to the top of the storage tank 1 and communicated with the storage tank 1. The bubble suction tube 21 is used to absorb bubbles floating above the slurry. The bubble blowing structure 22 is provided with a plurality of bubble blowing channels 221, and the air inlet of the bubble blowing channel 221 is communicated with the bubble suction tube 21. The bubble suction tube 21 is also connected to a blowing port 211, which is provided between the storage tank 1 and the bubble blowing structure 22. The blowing port 211 can blow air toward the bubble blowing structure 22. In this embodiment, the blowing port 211 is connected to a compressed air delivery device, which can form a negative pressure in the bubble suction tube 21, thereby sucking bubbles into the bubble suction tube 21. The defoaming tube 3 is communicated with the air outlet of the bubbling channel 221 , and the defoaming tube 3 is also communicated with the material storage tank 1 .
[0035] The slurry defoaming device provided in this embodiment inflates the bubbling structure 22 through the air port 211, and the gas-liquid flow in the bubbling structure 22 causes negative pressure in the bubble suction tube 21. Under the negative pressure state, the bubble suction tube 21 can absorb the bubbles in the storage tank 1 into the bubble suction tube 21, and the bubbles can continue to flow in the bubble suction tube 21. After the bubbles flow into the bubbling channel 221, under the effect of the viscosity between the slurry that forms the bubbles and the side wall of the bubbling channel 221, the bubbles gradually expand during the continuous blowing of the bubbling structure 22 from the air port 211. After entering the defoaming tube 3, the expanded bubbles collide with the inner wall of the defoaming tube 3 and break into slurry. Finally, the slurry in the defoaming tube 3 flows into the storage tank 1 for subsequent work. The slurry defoaming device expands the bubbles through the bubble blowing device 22, which makes them more easily broken after collision, thereby reducing the bubbles in the slurry and improving the quality of the slurry product; by absorbing the bubbles floating on the surface of the slurry, it avoids the waste caused by the accumulation of bubbles overflowing the storage tank 1, reduces the workload of manual defoaming, improves the utilization rate of the slurry, and reduces production costs; reduces the bubbles in the slurry, improves the quality of the slurry product, and does not produce defects such as bright spots when coating the slurry, resulting in poor appearance and scrapped workpieces.
[0036] In order to ensure that the air suction port of the bubble suction tube 21 can smoothly suck in the bubbles, the storage tank 1 also includes a telescopic tube 13, which can be connected to the end of the bubble suction tube 21 away from the bubble blowing structure 22. The telescopic tube 13 extends downward. By adjusting the length of the telescopic tube 13, the inlet of the telescopic tube 13 is placed in the bubble above the slurry liquid surface, thereby enabling the bubble suction tube 21 to suck in the bubbles.
[0037] Preferably, a plurality of bubble channels 221 are provided, and the inner diameters of the plurality of bubble channels 221 gradually increase from the air inlet to the air outlet, so that bubbles gradually expand during the flow in the bubble channels 221, and bubbles with increased size are more easily broken after colliding with the inner wall of the defoaming cylinder 3. It should be noted that each bubble channel 221 is independent.
[0038] Continue to refer to Figure 1 , the upper side of the defoaming tube 3 is connected to the bubbling channel 221, and the lower side of the defoaming tube 3 is set to a conical structure. The cross-section of the conical structure gradually decreases from top to bottom to form a funnel shape, which speeds up the flow rate of the slurry. At the same time, it can also enhance the collision effect between the bubbles and the inner wall of the defoaming tube 3, which is conducive to improving the efficiency of bubble rupture. In this embodiment, the upper part of the defoaming tube 3 is a cylindrical tube structure, and the lower part is a conical structure. In some other embodiments, the defoaming tube 3 can also be set as a conical structure as a whole. Furthermore, in other embodiments, the outlet at the bottom of the defoaming tube 3 can extend below the liquid level of the slurry to prevent the slurry in the defoaming tube 3 from generating bubbles when it flows into the storage tank 1.
[0039] Furthermore, the defoaming cylinder 3 includes a spiral blade (not shown in the figure), which extends downward around the axis of the defoaming cylinder 3. The slurry entering the defoaming cylinder 3 can flow downward along the rotation of the spiral blade, thereby extending the flow distance of the slurry in the defoaming cylinder 3 and expanding the collision area of the bubbles in the defoaming cylinder 3, further promoting the rupture of the bubbles.
[0040] Preferably, a protrusion structure is provided on the inner wall of the defoaming cylinder 3, which is conducive to the collision and rupture of bubbles. In this embodiment, the protrusion structure is a needle-shaped protrusion, and in some other embodiments, the protrusion structure can be a columnar protrusion or a corrugated protrusion.
[0041] In order to ensure the air pressure balance in the defoaming cylinder 3, an exhaust hole 31 is provided on the top of the defoaming cylinder 3, and the gas generated by the bursting of bubbles can be discharged through the exhaust hole 31, thereby preventing the continuous accumulation of gas in the defoaming cylinder 3 from causing excessive air pressure and affecting the flow of bubbles in the bubble suction tube 21 into the defoaming cylinder 3.
[0042] Reference Figure 2 The storage tank 1 includes a top cover 11 and a tank body 12. The top cover 11 covers the top of the tank body 12 and can be separated from the tank body 12. The tank body 12 is used to contain slurry. Preferably, the top cover 11 includes a first part 111 and a second part 112. The first part 111 is used to install the bubble absorption unit 2 and the defoaming cylinder 3. The second part 112 is rotatably connected to the first part 111, so as to facilitate the use of the slurry in the tank body 12.
[0043] It should be noted that the storage tank 1 also includes a slurry replenishment port and a slurry return port (not shown in the figure), and the slurry replenishment port can be connected to an external slurry conveying device to replenish slurry into the storage tank 1. The slurry return port is externally connected to a slurry recovery device, which can recover the excess slurry that flows out of the storage tank 1. The recovered slurry flows back to the storage tank 1 through the slurry return port, thereby realizing the reuse of slurry, saving production costs, and avoiding waste. At the same time, the slurry can be continuously replenished into the storage tank 1 through the slurry replenishment port and the slurry return port, so that the slurry in the storage tank 1 will be maintained at a relatively stable liquid level height, for example, the slurry liquid level height is within the range of 80%-90% of the height of the storage tank 1, and there is no need to frequently adjust the length of the telescopic tube 13, thereby reducing the workload.
[0044] Furthermore, the storage tank 1 also includes a stirring device (not shown in the figure), which includes a rotating blade and a driving motor. The driving motor can drive the rotating blade to rotate in the storage tank 1. When the driving motor drives the rotating blade to rotate in the slurry, it can prevent the slurry from settling and stratification, and at the same time can increase the flow rate of bubbles in the slurry, thereby accelerating the floating of bubbles to the slurry liquid surface.
[0045] In order to facilitate the movement of the storage tank 1, the slurry defoaming device further includes a moving mechanism 4, which is located below the storage tank 1 to facilitate the movement of the storage tank 1. In this embodiment, the moving mechanism 4 is a mobile cart, and the storage tank 1 can be placed on the mobile cart for movement. In some other embodiments, the moving mechanism 4 can also be set as casters installed at the bottom of the storage tank 1.
[0046] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. A slurry defoaming device, characterized in that: include: A storage tank (1) for storing slurry; The bubble suction unit (2) comprises a bubble suction tube (21) and a bubble blowing structure (22) connected in sequence, wherein one end of the bubble suction tube (21) away from the bubble blowing structure (22) is connected to the top of the material storage tank (1) and communicates with the material storage tank (1), the bubble blowing structure (22) is provided with a plurality of bubble blowing channels (221), the air inlet of the bubble blowing channel (221) is communicated with the bubble suction tube (21), the bubble suction tube (21) is also connected with an air blowing port (211), the air blowing port (211) is provided between the material storage tank (1) and the bubble blowing structure (22), and the air blowing port (211) is capable of blowing air toward the bubble blowing structure (22); The defoaming cylinder (3) is connected to the air outlet of the bubbling channel (221), and the defoaming cylinder (3) is also connected to the material storage tank (1).
2. The slurry defoaming device according to claim 1, characterized in that: A plurality of the bubbling channels (221) are provided, and the inner diameters of the plurality of bubbling channels (221) gradually increase in a direction from the air inlet to the air outlet.
3. The slurry defoaming device according to claim 1, characterized in that: The material storage tank (1) further comprises a telescopic tube (13), wherein the telescopic tube (13) is connected to an end of the bubble suction tube (21) away from the bubble blowing structure (22).
4. The slurry defoaming device according to claim 1, characterized in that: The defoaming cylinder (3) comprises a spiral blade, and the spiral blade extends downward around the axis of the defoaming cylinder (3).
5. The slurry defoaming device according to claim 1, characterized in that: A protruding structure is provided on the inner wall of the defoaming cylinder (3).
6. The slurry defoaming device according to claim 1, characterized in that: The top of the defoaming cylinder (3) is provided with an exhaust hole (31).
7. The slurry defoaming device according to claim 1, characterized in that: The upper side of the defoaming cylinder (3) is connected to the bubbling channel (221), and the lower side of the defoaming cylinder (3) is arranged as a conical structure, and the cross-section of the conical structure gradually decreases from top to bottom.
8. The slurry defoaming device according to claim 1, characterized in that: The material storage tank (1) comprises a top cover (11) and a tank body (12), wherein the top cover (11) covers the top of the tank body (12), and the top cover (11) comprises a first part (111) and a second part (112), wherein the first part (111) is used to install the bubble absorption unit (2) and the bubble elimination cylinder (3), and the second part (112) is rotatably connected to the first part (111).
9. The slurry defoaming device according to claim 1, characterized in that: The material storage tank (1) further comprises a stirring device, wherein the stirring device comprises a rotating blade and a driving motor, and the driving motor is capable of driving the rotating blade to rotate in the material storage tank (1).
10. The slurry defoaming device according to claim 1, characterized in that: It also comprises a moving mechanism (4), wherein the moving mechanism (4) is arranged at the bottom of the material storage tank (1).