Lithium battery diaphragm cooling equipment

Abstract

The invention relates to lithium battery diaphragm cooling equipment which comprises a lithium film casting roller which is positioned below a lithium film blanking die head, so that a liquid film extruded by the lithium film blanking die head is in contact with the lithium film casting roller; the cold air cooling assembly is connected with a refrigeration assembly, the cold air cooling assembly is located on the side of the lithium film casting piece roller, a gap is formed between the cold air cooling assembly and the lithium film casting piece roller, when the lithium film casting piece roller rotates, the liquid film can pass through the gap between the cold air cooling assembly and the lithium film casting piece roller, and the cold air cooling assembly cools the liquid film; compared with the prior art, the lithium battery film cooling device has the beneficial effects that through the structural design of the cold air cooling assembly, a lithium battery film formed on the surface of the lithium film collecting roller can be reasonably and rapidly cooled, the production efficiency of the lithium film is greatly improved, and the speed can be increased by 50%-90%.

Description

Technical Field

[0001] The present invention belongs to the field of lithium battery separator processing equipment, and specifically relates to an equipment for cooling lithium battery separators. Background Art

[0002] During the production process of lithium battery separators, a liquid lithium film is extruded from a high-temperature lithium film blanking die head. When the liquid lithium film contacts the lithium film receiving roller, a lithium battery thin film is formed on the surface of the lithium film receiving roller. During this process, the high-temperature liquid lithium film becomes a solid thin film, which needs to be cooled. In the prior art, usually, it relies on natural cooling, and the cooling time is relatively long and the speed is slow, thus greatly reducing the production efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a lithium battery separator cooling equipment to solve the problems of long cooling time and low processing efficiency in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is a lithium battery separator cooling equipment, including: a lithium film casting roll, which is located below the lithium film blanking die head so that the liquid thin film extruded from the lithium film blanking die head contacts the lithium film casting roll; a cold air cooling component, which is connected to a refrigeration component and is located on the side of the lithium film casting roll, with a gap between them. When the lithium film casting roll rotates, the liquid thin film can pass through the gap between the cold air cooling component and the lithium film casting roll, and the cold air cooling component cools the liquid thin film.

[0005] Further, the cold air cooling component includes an air knife cooling cover and cold air knives. The air knife cooling cover has a single-sided opening and is curved in an arc shape; the cold air knives are provided with air outlet openings, and there are several cold air knives arranged along the arc bending direction of the air knife cooling cover, and the distances from several cold air knives to the center of the lithium film casting roll are equal.

[0006] Further, the refrigeration component includes a cold source air blower and a cold source air main pipeline. The cold source air blower is used to generate low-temperature cold air; the cold source air main pipeline is used to transport the low-temperature cold air generated by the cold source air blower, and the cold air knives are connected to the cold source air main pipeline so that the low-temperature cold air can enter the cold air knives.

[0007] Further, a negative pressure partition is arranged inside the air knife cooling cover.

[0008] Further, the air knife cooling cover is connected to a smoke exhaust main pipeline, and an oil fume suction and exhaust component is connected to the smoke exhaust main pipeline. The smoke exhaust main pipeline enables the oil fume to be filtered by the oil fume suction and exhaust component and then discharged.

[0009] Furthermore, a top air knife is provided on the air knife cooling hood. The top air knife has the same structure as the cold air knife and can be connected to a cold source air cooler or an oil fume suction and exhaust component.

[0010] Furthermore, the air outlet of the cold air knife is connected to a knife mouth, which is composed of a double layer of Teflon and a layer of thermal insulation cotton, and the thermal insulation cotton is sandwiched between the two layers of Teflon.

[0011] Furthermore, it also includes a wind hood fixing steel frame and a wind hood movable adjustment bracket, the wind hood fixing steel frame is connected to a guide rail, and the wind hood fixing steel frame can move along the guide rail; the wind hood movable adjustment bracket is connected to the wind hood fixing steel frame, and the wind hood movable adjustment bracket is used to install the wind knife cooling hood.

[0012] Furthermore, a cold air hood fixed side mounting plate is provided on the wind hood movable adjustment bracket, and the cold air hood fixed side mounting plate is used to fix the air knife cooling hood.

[0013] Furthermore, a lifting module is provided on the wind hood movable adjustment bracket, and the telescopic end of the lifting module is axially connected to the fixed side mounting plate of the cold air hood, so that the lifting module can adjust the horizontal height of the wind knife cooling hood.

[0014] Compared with the prior art, the beneficial effect of the present invention is that through the structural design of the cold air cooling component, the lithium battery film formed on the surface of the lithium film receiving roller can be cooled reasonably and quickly, greatly increasing the production efficiency of the lithium film and increasing the speed by 50%-90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall top view of the structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the cold air cooling component of the present invention;

[0018] Figure 4 This is a schematic cross-sectional view of the cold air cooling component of the present invention;

[0019] Figure 5 This is a schematic diagram of the position of the cold air cooling component and the lithium film casting roller of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of the wind shield movable adjustment bracket of the present invention;

[0021] Figure 7 Schematic diagram of the cross-sectional structure of the cold air knife of the present invention;

[0022] Among them, 1 - lithium film casting roller, 2 - cold air cooling component, 201 - air knife cooling cover, 202 - cold air knife, 203 - negative pressure partition board, 204 - oil fume exhaust hole, 3 - lithium film blanking die head, 4 - lithium battery thin film, 5 - refrigeration component, 501 - cold source air main pipeline, 502 - cold source air cooler, 6 - main oil fume exhaust pipeline, 7 - negative pressure fan, 8 - oil fume filter, 9 - top air knife, 10 - air cover fixed steel frame, 11 - air cover movable adjustment bracket, 12 - cold air cover fixed side mounting plate, 13 - cold air cover fixed mounting shaft, 14 - lifting module, 15 - reversing speed reducer, 16 - overall positioning frame, 17 - guide rail, 18 - positioning handle, 19 - Teflon anti-collision guard plate. Detailed implementation manner

[0023] Combined with the accompanying drawings in the embodiments of the present invention below, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0024] Refer to Figures 1 to 7 As shown, a lithium film cooling device includes a lithium film casting roller 1 and a cold air cooling component 2. The cold air cooling component 2 is located on the side of the lithium film casting roller 1, and there is a gap between the two. The lithium film casting roller 1 is located below the lithium film blanking die head 3. The extruded liquid film contacts the lithium film casting roller 1. At this time, the liquid film is located between the lithium film casting roller 1 and the cold air cooling component 2. As the lithium film casting roller 1 rotates, the liquid film passes through the gap between the two, and then passes through the cold air cooling component 2 to cool and lower the temperature of the extruded liquid film to form a lithium battery thin film 4, thereby improving the efficiency.

[0025] The cold air cooling component 2 therein includes an air knife cooling cover 201 and a cold air knife 202. There is a cold air inlet at each end of the cold air knife 202. An air outlet slit is provided on the cold air knife 202. The cold air knives 202 are several and are all located in the air knife cooling cover 201. The air knife cooling cover 201 has a single-sided opening, and the air knife cooling cover 201 is arc-shaped. The several cold air knives 202 are arranged along the arc direction of the air knife cooling cover 201. When the air knife cooling cover 201 is adjusted to the specified position, the distances between the several cold air knives 202 and the center of the lithium film casting roller 1 are equal. The several cold air knives 202 can blow out cold air, and the cold air blows towards the liquid film on the lithium film casting roller 1 after passing through the single-sided opening, thereby realizing the cooling of the extruded liquid film.

[0026] The cold air is then fed into the cold air knife 202 and fed into the cold air knife 202. The cold air is then fed into the cold air knife 202 and fed into the cold air knife 202. The cold air is then fed into the cold air knife 202 and fed into the cold air knife 202.

[0027] A negative pressure partition 203 is provided at the air intake position inside the air knife cooling cover 201, which is used to form a negative pressure area around the inside of the air knife cooling cover 201 to prevent external moisture from flowing into the air knife cooling cover 201 and contacting the cold air knife to produce liquefied water droplets, thereby avoiding the liquefied water droplets from blowing onto the surface of the lithium membrane and affecting the yield rate.

[0028] Oil fume exhaust holes 204 are provided on both sides of the above-mentioned wind knife cooling hood 201. The oil fume exhaust holes 204 are connected to the exhaust main line 6 through a hose. The exhaust main line 6 is connected with an oil fume suction and exhaust component. The oil fume suction and exhaust component includes a negative pressure fan 7 and an oil fume filter 8, and the two are connected. The oil fume filter 8 is fixed on the exhaust main line 6. During the process of cooling the liquid film by the cold air knife 202, a large amount of high-temperature oil fume gas accumulates inside the wind knife cooling hood 201, thereby forming a quilt effect, which prevents the heat inside the wind knife cooling hood 201 from dissipating. Therefore, the high-temperature oil fume needs to be discharged. At this time, the negative pressure fan 7 works to make the high-temperature oil fume gas accumulated inside the wind knife cooling hood 201 pass through the exhaust main line 6 and enter the oil fume filter 8. The high-temperature oil fume is filtered out by the oil fume filter 8, and relatively clean air is discharged.

[0029] There is a top air knife 9 at the top of the air knife cooling cover 201. The top air knife 9 has the same structure as the cold air knife 202. The top air knife 9 can be connected to the cold source air cooler 502. At this time, it can let in cold air to cool the membrane surface. The top air knife 9 can also be connected to the smoke exhaust main line 6 to extract high-temperature oil smoke through the negative pressure fan 7. The specific adjustment can be made appropriately according to the existing on-site conditions.

[0030] In this application, a wind hood fixing steel frame 10 is also provided. The wind hood fixing steel frame 10 is used to fix, install and move the air knife cooling hood 201. The air knife cooling hood 201 is connected to the wind hood fixing steel frame 10 through a wind hood moving and adjusting bracket 11. A cold air hood fixing side mounting plate 12 and a lifting module 14 are arranged on the wind hood moving and adjusting bracket 11. The cold air hood fixing side mounting plate 12 is used to fix the air knife cooling hood 201. The cold air hood fixing side mounting plate 12 is connected to the lifting module 14 through a cold air hood fixing mounting shaft 13, which can adjust the angle of the air knife cooling hood 201. A reversing speed reducer 15 is docked on the lifting module 14. The reversing speed reducer 15 controls the telescoping of the lifting module 14. The telescoping end of the lifting module 14 is axially connected to the cold air hood fixing side mounting plate 12, so that the horizontal height of the air knife cooling hood 201 can be adjusted. A module adjusting runner and a module locking handle are connected to the lifting module 14. After the horizontal height of the air knife cooling hood 201 is adjusted, its height can be locked.

[0031] In this equipment, the lithium film casting roller 1 is installed on an overall positioning frame 16. A horizontally extending guide rail 17 is arranged on the overall positioning frame 16. The wind hood fixing steel frame 10 is connected to the guide rail 17, and the position of the wind hood fixing steel frame 10 can be adjusted. Guide rail limiters are arranged at both ends of the guide rail to prevent the entire air knife cooling hood 201 and the wind hood moving and adjusting bracket 11 from moving out of the track during the movement. When controlling the horizontal movement of the wind hood fixing steel frame 10, a positioning handle 18 is arranged on the wind hood moving and adjusting bracket 11. The position of the wind hood fixing steel frame 10 and its horizontal distance to the lithium battery film 4 are controlled through the positioning handle 18, which is convenient for the cooling operation.

[0032] In addition, a nozzle 2021 is docked at the air outlet of the cold air knife 202 in this embodiment. The nozzle 2021 is composed of two Teflon layers 20211 and one heat preservation cotton layer 20212. The heat preservation cotton layer 20212 is sandwiched between the two Teflon layers 20211, that is, the layer structure here is in turn: Teflon - heat insulation cotton - Teflon. Because the cold air passes through the cold air knife 202, the temperature of the blade opening of the cold air knife 202 is relatively low, and there is water vapor in the air, which will liquefy into water droplets and affect the yield rate when blown onto the film surface.

[0033] Finally, a Teflon anti-collision guard plate 19 is installed at the side opening of the air knife cooling hood 201 to prevent the air knife cooling hood 201 from hitting the lithium film casting roller 1 during the movement.

[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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; it can be an electrical connection; it can be a hydraulic oil circuit connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims described.

Claims

1. A lithium battery separator cooling device, characterized in that, Comprising: A lithium film casting roll, which is located below the lithium film blanking die head, enabling the liquid film extruded from the lithium film blanking die head to contact the lithium film casting roll; A cold air cooling assembly, which is connected to a refrigeration assembly. The cold air cooling assembly is located on the side of the lithium film casting roll, and there is a gap between them. When the lithium film casting roll rotates, the liquid film can pass through the gap between the cold air cooling assembly and the lithium film casting roll, and the cold air cooling assembly cools the liquid film.

2. The lithium battery separator cooling device according to claim 1, wherein The cold air cooling assembly includes: An air knife cooling cover, which has a single-sided opening and is curved in an arc shape; Cold air knives, on which there are air outlet slits. There are several cold air knives arranged along the arc bending direction of the air knife cooling cover, and the distances from the several cold air knives to the center of the lithium film casting roll are equal.

3. The lithium battery separator cooling device according to claim 2, wherein The refrigeration assembly includes: A cold source air blower, which is used to generate low-temperature cold air; A cold source air main pipeline, which is used to transport the low-temperature cold air generated by the cold source air blower. The cold air knives are docked with the cold source air main pipeline, enabling the low-temperature cold air to enter the cold air knives.

4. The lithium battery separator cooling device according to claim 2, wherein: A negative pressure partition is arranged inside the air knife cooling cover.

5. The lithium battery separator cooling device according to claim 2, characterized in that: The air knife cooling cover is connected to a smoke exhaust main pipeline, and an oil fume suction and exhaust assembly is docked on the smoke exhaust main pipeline. The smoke exhaust main pipeline enables the oil fume to be filtered by the oil fume suction and exhaust assembly and then discharged.

6. The lithium battery separator cooling device according to claim 5, characterized in that, A top air knife is arranged on the air knife cooling cover. The top air knife has the same structure as the cold air knives and can be connected to the oil fume suction and exhaust assembly.

7. The lithium battery separator cooling device according to any one of claims 2 to 6, characterized in that, A nozzle is docked at the air outlet slit of the cold air knife. The nozzle is composed of two layers of Teflon and one layer of heat insulation cotton, and the heat insulation cotton is sandwiched between the two layers of Teflon.

8. The lithium battery separator cooling device according to any one of claims 1 to 6, wherein It also includes: [[ID=1F]]A wind cover fixing steel frame, which is connected to a guide rail and can move along the guide rail; A wind cover moving and adjusting bracket, which is connected to the wind cover fixing steel frame and is used to install the air knife cooling cover.

9. The lithium battery separator cooling device according to claim 8, wherein, A cold air cover fixing side mounting plate is arranged on the wind cover moving and adjusting bracket and is used to fix the air knife cooling cover.

10. The lithium battery separator cooling device according to claim 9, characterized in that, A lifting module is also arranged on the wind cover moving and adjusting bracket. The telescopic end of the lifting module is axially connected to the cold air cover fixing side mounting plate, enabling the lifting module to adjust the horizontal height of the air knife cooling cover.

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