Slurry recovery system in battery diaphragm coating equipment

Abstract

The utility model discloses a slurry recovery system in battery diaphragm coating equipment, which comprises a bottom frame and two bearing plates arranged on the bottom frame at an interval, an anilox roller, a plate roller and a back roller are rotationally arranged on the two bearing plates, and a scraper box matched with the anilox roller is also arranged on the two bearing plates; a trough located below the scraper box and the anilox roller is mounted on the two bearing plates, and a blanking port is formed in the lower end of the trough; a supporting plate and a material receiving disc mounted on the supporting plate are mounted on the two bearing plates, the material receiving disc is located below the matching position of the anilox roller and the plate roller, and a discharging opening is formed in the material receiving disc; the two bearing plates are provided with a material returning disc located below the matching position of the printing roller and the back roller, and the material returning disc is provided with a flow guiding opening. The two bearing plates are further provided with a confluence disc, the discharging opening, the discharging opening and the flow guide opening are all located above the confluence disc, and a confluence opening is formed in the lower end of the confluence disc; the current situation that the recycling rate is low due to the fact that existing slurry recycling is prone to splashing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery diaphragm coating equipment, in particular to a slurry recovery system in battery diaphragm coating equipment. Background Art

[0002] During the charge and discharge process of lithium-ion batteries, the separator separates the positive and negative electrodes, preventing contact and short circuits. It also absorbs sufficient electrolyte, provides ample electrolyte and lithium ion channels, and provides micropore self-sealing protection. The separator's lithium ion conductivity is directly related to the overall performance of the lithium-ion battery. The separator's performance determines the battery's interface structure, electrolyte retention, and internal resistance, which in turn affects key battery characteristics such as capacity, cycle performance, charge and discharge current density, and safety. Separators can also be coated to achieve higher heat resistance or liquid absorption, further improving battery safety.

[0003] During the process of transferring the slurry from the loading position and coating it on the diaphragm, the slurry may flow downward, so the falling slurry needs to be recovered. The existing recovery method directly receives it through a receiving trough at the bottom, which easily causes slurry splashing and leads to a low recovery rate. Utility Model Content

[0004] (1) Technical issues

[0005] The purpose of the utility model is to provide a slurry recovery system in a battery diaphragm coating device, so as to solve the problem that the existing slurry recovery is prone to splashing and leads to a low recovery rate.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0009] Preferably, a transverse adjustment mechanism for adjusting the spacing distance between the plate roller and the anilox roller is provided on the carrier plate, and the support plate is mounted on the transverse adjustment mechanism.

[0010] Preferably, the support plate is provided with a plurality of through holes distributed in an array, and the through holes are located above the receiving tray.

[0011] Preferably, the anilox roller, the plate roller and the back roller are all connected to independently operated driving mechanisms.

[0012] Preferably, the material trough includes an inclined bottom plate and side baffles arranged around the bottom plate, and the material drop opening is arranged on the lower end side of the bottom plate.

[0013] Preferably, the return material tray includes a vertical plate and an oblique guide plate bent and inclined relative to the vertical plate, side guide plates are provided on both sides of the vertical plate and the oblique guide plate, and a guide opening is provided at the lower end of the oblique guide plate.

[0014] Preferably, the scraper box is provided with a material storage cavity and scraper blades located on both sides of the material storage cavity and arranged obliquely, one side of the anilox roller is arranged in the material storage cavity, and the scraper blades are slidably matched with the surface of the anilox roller.

[0015] Preferably, the scraper box is provided with a liquid inlet located at the bottom and an overflow port located at the top.

[0016] Preferably, the scraper box is provided with sealing gaskets located at both ends of the storage cavity.

[0017] (3) Beneficial effects

[0018] The slurry falling from the joint of the scraper box and the anilox roller is recovered through the material trough below the joint of the scraper box and the anilox roller. The relatively small distance between them is used to recover the slurry falling from the joint of the anilox roller and the plate roller. The slurry falling from the joint is recovered through the return material tray below the joint of the plate roller and the back roller. The slurry collected in the material trough, the material receiving tray and the return material tray is collected through the confluence tray at the bottom and finally discharged to the outside for recycling.

[0019] In addition, by introducing the conduit connected to the drop port and the discharge port into the collection plate, the slurry recovered on the return plate flows to the collection plate through the guide opening, which can effectively avoid excessive splashing of slurry during the process and improve the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2This is a schematic cross-sectional view of an embodiment of the present invention;

[0022] Figure 3 This is a structural diagram of a hidden coating mechanism in an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the slurry diversion and collection structure in an embodiment of the present utility model;

[0024] exist Figures 1 to 4 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0025] Base frame 1, carrying plate 2, anilox roller 3, plate roller 4, back roller 5, scraper box 6, material trough 7, bottom plate 71, side baffle 72, material drop port 8, support plate 9, material receiving tray 10, material outlet 11, return material tray 12, vertical plate 121, oblique guide plate 122, side baffle guide plate 123, diversion opening 13, confluence plate 14, confluence port 15, transverse adjustment mechanism 16, through hole 17, material storage chamber 18, scraper blade 19, liquid inlet 20, overflow port 21. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] See also Figure 1 one Figure 4 As shown, in the embodiment of the utility model, a slurry recovery system in a battery diaphragm coating device is proposed, which is applied to the entire battery diaphragm coating device. In the process from slurry loading to transfer coating on the diaphragm, the slurry will fall downward, so the fallen slurry needs to be recovered and applied. Specifically, it includes a base frame 1 and two supporting plates 2 installed at intervals on the base frame 1. The two supporting plates 2 are rotatably mounted with an anilox roller 3, a plate roller 4, and a back roller 5. The two supporting plates 2 are also mounted with a scraper box 6 that cooperates with the anilox roller 3. The base frame 1 and the two supporting plates 2 form a bearing frame structure, which supports the anilox roller 3, the plate roller 4, and the back roller 5, and cooperates with each other to achieve slurry transfer. The slurry on the anilox roller 3 is immersed in the scraper box 6. As a result, there is excess slurry falling between the scraper box 6 and the anilox roller 3, between the anilox roller 3 and the plate roller 4, and between the plate roller 4 and the back roller 5. Directly receiving the slurry at all positions will cause splashing, which on the one hand affects the recycling rate, and on the other hand is likely to affect the diaphragm. Therefore, slurry recovery needs to be carried out at each position.

[0028] Specifically, a material trough 7 is installed on the two supporting plates 2 and is located below the scraper box 6 and the anilox roller 3. A drop port 8 is provided at the lower end of the material trough 7. The slurry dropped here is recovered through the material trough 7 and collected at the lower end, and then discharged outward through the drop port 8. The position of the material trough 7 is close to the drop location, so no splashing will occur.

[0029] At the same time, a support plate 9 and a receiving tray 10 installed on the support plate 9 are installed on the two supporting plates 2. The receiving tray 10 is located below the matching position of the anilox roller 3 and the plate roller 4. A discharge port 11 is provided on the receiving tray 10. The slurry falling here is collected by the receiving tray 10 and discharged through the discharge port 11. A short spacing distance is also maintained to avoid splashing.

[0030] A return material tray 12 is installed on the two supporting plates 2 and is located below the matching position of the plate roller 4 and the back roller 5. The return material tray 12 is provided with a diversion opening 13. The slurry is diverted downward by the return material tray 12 and discharged through the diversion opening 13, which can also avoid splashing.

[0031] Specifically, a convergence plate 14 is also installed on the two supporting plates 2, and the drop port 8, the discharge port 11 and the guide opening 13 are all located above the convergence plate 14. A convergence port 15 is provided at the lower end of the convergence plate 14, and all the slurry above it is collected and discharged through the convergence plate 14, wherein the slurry in the material trough 7 is discharged to the convergence plate 14 through the pipeline connected to the drop port 8, and the slurry collected in the receiving plate 10 is discharged to the convergence plate 14 through the pipeline connected to the discharge port 11, and the slurry in the return plate 12 flows into the convergence plate 14 through the guide opening 13.

[0032] Therefore, slurry recovery can be achieved by adapting different slurry falling positions, avoiding splashing caused by high slurry falling heights, effectively protecting the diaphragm, and improving the slurry recovery efficiency.

[0033] Specifically, the coating thickness is changed after the spacing between the plate roller 4 and the anilox roller 3 is adjusted, and the fitting between the plate roller 4 and the anilox roller 3 will change with the position adjustment, requiring synchronous movement of the slurry recovery. Therefore, a transverse adjustment mechanism 16 for adjusting the spacing distance between the plate roller 4 and the anilox roller 3 is provided on the carrier plate 2. The support plate 9 is mounted on the transverse adjustment mechanism 16. The transverse adjustment mechanism 16 can be a guide rail sliding combined with a linear motor or a screw motor to achieve reciprocating adjustment, and a mature adjustment mechanism can be directly used. Therefore, after the support plate 9 is mounted on the transverse adjustment mechanism 16, it can be synchronized with the spacing adjustment during the spacing adjustment and achieve position movement, so that the receiving tray 10 is always located below the fitting between the plate roller 4 and the anilox roller 3, ensuring reliable slurry recovery.

[0034] At the same time, a plurality of through holes 17 distributed in an array are provided on the support plate 9 . The through holes 17 are located above the receiving tray 10 . The slurry dropped on the support plate 9 is also flowed into the collecting tray 14 through the through holes 17 .

[0035] Specifically, the anilox roller 3, the plate roller 4 and the back roller 5 are all connected to independently operated driving mechanisms, which can be composed of a motor and a reducer to independently realize driving, so as to facilitate adjustment of different speeds and directions required for slurry transfer.

[0036] The trough 7 includes an inclined bottom plate 71 and side baffles 72 arranged around the bottom plate 71. The discharge port 8 is located at the lower end of the bottom plate 71. The inclined bottom plate 71 allows the slurry to flow toward the lower end after entering, facilitating discharge from the discharge port 8. At the same time, the side baffles 72 can provide the entire trough 7 with a certain volume, thereby blocking and buffering the flow of slurry.

[0037] The return material tray 12 includes a vertical plate 121 and an oblique guide plate 122 that is bent and inclined relative to the vertical plate 121. Side guide plates 123 are provided on both sides of the vertical plate 121 and the oblique guide plate 122. The lower end of the oblique guide plate 122 is provided with a guide opening 13. Similarly, the bent oblique guide plate 122 is used to guide the falling slurry and flow it into the confluence tray 14 from the guide opening 13. The side guide plate 123 also blocks the falling slurry to prevent it from splashing.

[0038] Specifically, a storage cavity 18 and a scraper blade 19 located on both sides of the storage cavity 18 and inclinedly arranged are provided on the scraper box 6. One side of the anilox roller 3 is provided in the storage cavity 18. The scraper blade 19 slides with the surface of the anilox roller 3. The storage cavity 18 is filled with slurry to fill the glue groove 7 on the anilox roller 3. The slurry is scraped flat by the scraper blade 19 as the anilox roller 3 rotates, and the slurry is transferred when it rotates to the mating position of the plate roller 4.

[0039] In order to avoid the generation of bubbles when the slurry is loaded onto the anilox roller 3, a liquid inlet 20 at the bottom and an overflow port 21 at the top are provided on the scraper box 6. After the slurry is pumped in through the liquid inlet 20, it continues to flow out from the overflow port 21, keeping the slurry in the storage chamber 18 full, eliminating slurry bubbles, and ensuring that the grooves on the anilox roller 3 can be filled with slurry.

[0040] At the same time, sealing gaskets are installed on the scraper box 6 at both ends of the storage chamber 18. The sealing gaskets are used to seal the two ends of the storage chamber 18. The sealing gaskets cooperate with the anilox roller 3 to prevent the slurry from flowing out from both sides during the rotation process, thereby ensuring the reliability of the internal anilox roller 3 loading process.

[0041] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A slurry recovery system in a battery separator coating device, characterized in that: It includes a base frame and two supporting plates installed on the base frame at intervals, the two supporting plates are rotatably mounted with anilox rollers, plate rollers and back rollers, and the two supporting plates are also mounted with scraper boxes that cooperate with the anilox rollers; A material trough located below the scraper box and the anilox roller is installed on the two carrying plates, and a material drop opening is provided at the lower end of the material trough; A support plate and a material receiving tray mounted on the support plate are mounted on the two carrying plates. The material receiving tray is located below the mating position of the anilox roller and the plate roller, and a material discharge port is provided on the material receiving tray. The two carrying plates are provided with a return material tray located below the mating position of the plate roller and the back roller, and the return material tray is provided with a guide opening; A confluence plate is also installed on the two supporting plates. The blanking port, the discharge port and the guide opening are all located above the confluence plate. A confluence port is provided at the lower end of the confluence plate.

2. The slurry recovery system in a battery separator coating device according to claim 1, characterized in that: The carrying plate is provided with a transverse adjustment mechanism for adjusting the spacing distance between the plate roller and the anilox roller, and the support plate is mounted on the transverse adjustment mechanism.

3. The slurry recovery system in a battery separator coating device according to claim 2, characterized in that: The support plate is provided with a plurality of through holes distributed in an array, and the through holes are located above the receiving tray.

4. A slurry recovery system for a battery separator coating device according to any one of claims 1 to 3, characterized in that: The anilox roller, the plate roller and the back roller are all connected with independently operated driving mechanisms.

5. The slurry recovery system in a battery separator coating device according to claim 4, characterized in that: The material trough includes an inclined bottom plate and side baffles arranged around the bottom plate, and the material drop opening is arranged on one side of the lower end of the bottom plate.

6. The slurry recovery system in a battery separator coating device according to claim 4, characterized in that: The return material tray includes a vertical plate and an oblique guide plate bent and inclined relative to the vertical plate. Side guide plates are provided on both sides of the vertical plate and the oblique guide plate. A guide opening is provided at the lower end of the oblique guide plate.

7. The slurry recovery system in a battery separator coating device according to claim 4, characterized in that: The scraper box is provided with a material storage cavity and scraper blades located on both sides of the material storage cavity and arranged obliquely. One side of the anilox roller is arranged in the material storage cavity, and the scraper blades are slidably matched with the surface of the anilox roller.

8. The slurry recovery system in a battery separator coating device according to claim 7, characterized in that: The scraper box is provided with a liquid inlet located at the bottom and an overflow port located at the top.

9. The slurry recovery system in a battery separator coating device according to claim 8, characterized in that: The scraper box is provided with sealing pads located at both ends of the material storage cavity.

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