Isolation membrane coating and drying apparatus with a blade structure having a flow guiding profile

Abstract

The utility model discloses a kind of leaf structure's isolating membrane coating drying equipment with flow guide surface, include drying cabinet and flow guide equipment, wherein, hollow columnar structure inside in flow guide equipment is equipped with shaft body, first flow guide vane and second flow guide vane are connected on shaft body, and first flow guide vane and second flow guide vane are oppositely arranged, the surface of two flow guide vanes is gradually curved surface profile, after gas is guided into hollow columnar structure by gas inlet, gas sequentially flows along the surface of two flow guide vanes and promotes flow guide vane rotation around shaft body, so that outlet is alternately shielded by vane in periodic cycle, and gas with pulse frequency is guided out, to form uniform drying gas flow field in drying cabinet, effectively improve the drying speed and uniformity of isolating membrane coating, avoid the problem of warping, wrinkle or rolling due to airflow uneven.

Description

Technical Field

[0001] This utility model relates to a separator coating and drying device, and more particularly to a separator coating and drying device with a blade structure having a guide surface. Background Technology

[0002] In recent years, with the widespread application of lithium-ion batteries in energy storage, consumer electronics and new energy vehicles, the demand and technical requirements for separators in battery manufacturing have been continuously increasing. A separator is a functional thin film with a microporous structure. In the wet separator processing technology, high-boiling-point, low-volatility solvents (such as paraffin oil, mineral oil, etc.) are usually used as pore-forming agents. After the solvent is removed by the extraction process, a microporous structure is formed. However, a certain amount of solvent and bubbles will still remain on the surface of the separator after extraction. These areas dry much slower than normal areas, and are prone to forming defects such as bright spots, oil spots or uneven pores on the membrane surface, resulting in a decrease in product performance and a reduction in yield.

[0003] Therefore, existing diaphragm drying processes typically employ hot air convection or air knife purging to evaporate residual solvents from the diaphragm within the drying chamber. However, traditional drying chambers often have fixed air ducts or narrow slit airflow structures, resulting in uneven airflow distribution and fluctuating air pressure. Specifically, the airflow field within the drying chamber is frequently asymmetrical, causing inconsistent drying on both sides of the diaphragm, leading to edge curling, wrinkles, and rolling. Additionally, slow drying speeds and low heat exchange efficiency limit production cycles, making it difficult to achieve both high efficiency and stable drying quality.

[0004] Based on this, this utility model proposes a separator coating and drying equipment with a blade structure featuring a flow-guiding curved surface. By using the flow-guiding geometric design of the blade curved surface and the control of the gas pulse flow field, a symmetrical and uniform airflow distribution is formed in the drying chamber, which effectively improves the heat and mass transfer efficiency and drying uniformity, reduces defects on the separator surface, and improves production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a membrane coating and drying device with a blade structure featuring a flow-guiding curved surface. Through the design of the flow-guiding curved surface, dynamic flow guidance is achieved, which enables a symmetrical and uniform airflow distribution within the drying chamber, effectively improving heat and mass transfer efficiency and drying uniformity, thereby reducing membrane surface defects and increasing production efficiency.

[0006] To achieve the above objectives, this utility model provides a separator coating and drying device with a blade structure featuring a guide surface, characterized in that it comprises: A drying chamber; and A flow guiding device is disposed inside the drying chamber, the flow guiding device comprising: A hollow columnar structure is provided with an air inlet, an air outlet, a top plate and a bottom plate. The air inlet is connected to a gas output device, and the air inlet and the air outlet are arranged opposite to each other. The top plate is located at one end of the hollow columnar structure and the bottom plate is located at the other end of the hollow columnar structure. Gas is introduced into the hollow columnar structure through the air inlet and discharged through the air outlet. A shaft is located at the center of the hollow columnar structure; A first guide vane, connected to the shaft, has a surface with a gradually curved profile, such that the surface width of the first guide vane gradually decreases from away from the shaft to close to the shaft; and A second guide vane is connected to the shaft body. The second guide vane and the first guide vane are arranged opposite to each other. The surface of the second guide vane has a gradually curved profile, so that the surface width of the second guide vane gradually decreases from away from the shaft body to close to the shaft body. When gas is introduced into the hollow columnar structure, the gas will flow along the surface of the first guide vane and be guided by its curved profile to be discharged towards the shaft, thereby driving the first guide vane to rotate around the shaft. Subsequently, some gas flows along the surface of the second guide vane and is guided by its curved profile to be discharged towards the side of the second guide vane away from the shaft, so that the second guide vane also rotates around the shaft. In one cycle, the first guide vane and the second guide vane can selectively rotate around the axis inside the hollow columnar structure. The air inlet and the air outlet are alternately blocked by the first guide vane and the second guide vane, so that the gas introduced into the drying chamber from the air outlet has a pulse frequency and forms a uniform drying gas flow field in the drying chamber to perform a drying process on a separation membrane.

[0007] Preferably, the first guide vane and the second guide vane are disposed on the shaft at intervals, and the angle formed between a first line segment formed by the center of gravity of the first guide vane and the center of gravity of the shaft and a second line segment formed by the center of gravity of the second guide vane and the center of gravity of the shaft is 180°.

[0008] Preferably, the first guide vane and the second guide vane have an arc-shaped region on the side away from the shaft, and the arc degree in the arc-shaped region is less than or equal to 90°.

[0009] Preferably, the first guide vane and the second guide vane have a torsion angle from the side closer to the shaft to the side farther from the shaft, the torsion angle being between 15° and 30°.

[0010] Preferably, there is a gap between the first guide vane and the second guide vane.

[0011] Preferably, the spacing is 2 / 3 to 4 / 5 times the diameter of the shaft.

[0012] Preferably, the first guide vane is provided with a plurality of first micropores and a first hollow guide cavity. The first micropores are disposed on the surface of the first guide vane, and the first hollow guide cavity is in communication with the first micropores. When gas flows along the surface of the first guide vane, some gas enters the first hollow guide cavity through the first micropores. The first hollow guide cavity expands to adjust the surface curve of the first guide vane, thereby changing the angle between the gas and the first guide vane.

[0013] Preferably, the second guide vane is provided with a plurality of second micropores and a second hollow guide cavity. The second micropores are disposed on the surface of the second guide vane, and the second hollow guide cavity is in communication with the second micropores. When the gas flows along the surface of the second guide vane, when some of the gas enters the second hollow guide cavity through the second micropores, the second hollow guide cavity expands to adjust the surface curve of the second guide vane, thereby changing the angle between the gas and the second guide vane.

[0014] Preferably, the width of the first guide vane and the second guide vane is greater than or equal to the diameter of the air inlet and the air outlet.

[0015] Preferably, the flow guiding device can be selectively configured at different heights inside the drying chamber to guide the drying gas in layers.

[0016] The beneficial effect of this invention is that it transforms the flow pattern of the gas inside the drying chamber from the traditional fixed straight flow to a periodically changing pulse flow field, thereby significantly improving the airflow uniformity and heat and mass transfer efficiency during the drying process. Furthermore, through the guiding effect of the gradually curved surface of the blades, the gas forms a dynamic airflow with variable direction as it passes through, which stabilizes the air pressure in each area of ​​the drying chamber and avoids local overheating or dead zones in the airflow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a device block according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the blade structure according to an embodiment of the present invention; and Figure 3 This is a schematic diagram illustrating an embodiment of the present utility model. Detailed Implementation

[0018] To make the above and / or other objectives, effects, and features of this utility model more apparent and understandable, preferred embodiments are described in detail below: Please see Figures 1 to 3 The figure shows a block diagram, a blade structure diagram, and an implementation diagram of one embodiment of the present invention. As shown, in one embodiment, the isolation film coating and drying equipment E with a blade structure featuring a guide surface includes a drying chamber B and a guide device 1. Their connection relationship and operation method are described below: Drying chamber B is used to place the diaphragm S that needs to be dried. The diaphragm S to be dried can be transferred to drying chamber B through a conveying structure for the drying process.

[0019] The flow guiding device 1 is installed inside the drying chamber B. The flow guiding device 1 includes a hollow columnar structure 11, a shaft 12, a first flow guiding blade 13, and a second flow guiding blade 14. Their connection relationship and operation method are described below: The hollow columnar structure 11 is provided with an air inlet 111, an air outlet 112, a top plate 113, and a bottom plate 114. The air inlet 111 is connected to a gas output device (not shown in the figure), and the air inlet 111 and the air outlet 112 are arranged opposite to each other on the two sides of the hollow columnar structure 11. The top plate 113 is located at one end of the hollow columnar structure 11, and the bottom plate 114 is located at the other end of the hollow columnar structure 11. Gas is introduced into the hollow columnar structure 11 through the air inlet 111 and leaves through the air outlet 112.

[0020] The shaft 12 is located at the center of the hollow columnar structure 11, while the first guide vane 13 and the second guide vane 14 can selectively rotate around the shaft 12 inside the hollow columnar structure 11. Specifically, in one cycle, the air inlet 111 and the air outlet 112 will be blocked by the first guide vane 13 and the second guide vane 14 in turn, so that the gas discharged from the air outlet 112 has a pulse frequency, and a uniform dry gas flow field can be formed in the drying chamber B to perform the drying process on the isolation membrane S.

[0021] The first guide vane 13 is connected to the shaft 12. The surface of the first guide vane 13 has a gradually curved profile, and the width of the first guide vane 13 gradually decreases from away from the shaft 12 to close to the shaft 12. Specifically, preferably, the ratio of the width of the first guide vane 13 on the side close to the shaft 12 to the width on the side away from the shaft 12 is between 1 / 5 and 1 / 3.

[0022] Preferably, the first guide vane 13 has an arc-shaped region C on the side away from the shaft 12, and the arc of this arc-shaped region C is less than or equal to 90°.

[0023] Preferably, the first guide vane 13 has a torsion angle from the side near the shaft 12 to the side away from the shaft 12, and the torsion angle is between 15° and 30°.

[0024] Preferably, the first guide vane 13 is provided with a plurality of first micropores 131 and a first hollow guide cavity 132. The first micropores 131 are disposed on the surface of the first guide vane 13, and the first hollow guide cavity 132 is in communication with the first micropores 131. When the gas flows along the surface of the first guide vane 13, when some of the gas enters the first hollow guide cavity 132 through the first micropores 131, the first hollow guide cavity 132 expands to adjust the surface curve of the first guide vane 13, so that the angle between the gas and the first guide vane 13 is changed.

[0025] The second guide vane 14 is connected to the shaft 12. The surface of the second guide vane 14 has a gradually curved profile. The second guide vane 14 and the first guide vane 13 are arranged opposite to each other. Similarly, the width of the second guide vane 14 gradually decreases from away from the shaft 12 to close to the shaft 12. Specifically, preferably, the ratio of the width of the second guide vane 14 on the side close to the shaft 12 to the width on the side away from the shaft 12 is between 1 / 5 and 1 / 3.

[0026] Preferably, the second guide vane 14 has an arc-shaped region C on the side away from the shaft 12, and the arc of this arc-shaped region C is less than or equal to 90°.

[0027] Preferably, the second guide vane 14 has a torsion angle from the side near the shaft 12 to the side away from the shaft 12. Specifically, the torsion angle gradually increases outward from the side near the shaft 12, and the torsion angle is between 15° and 30°.

[0028] Preferably, the second guide vane 14 is provided with a plurality of second micropores 141 and a second hollow guide cavity 142. The second micropores 141 are disposed on the surface of the second guide vane 14, and the second hollow guide cavity 142 is in communication with the second micropores 141. When the gas flows along the surface of the second guide vane 14, when some of the gas enters the second hollow guide cavity 142 through the second micropores 141, the second hollow guide cavity 142 expands to adjust the surface curve of the second guide vane 14, so that the angle between the gas and the second guide vane 14 is changed.

[0029] In one embodiment, the specific airflow guidance method is as follows: after the gas is introduced, the gas will flow along the surface of the first guide vane 13 and be guided by its curved profile toward the shaft 12, thereby pushing the first guide vane 13 to rotate around the shaft 12. Subsequently, some gas flows along the surface of the second guide vane 14 and is guided by its curved profile toward the side of the second guide vane 14 away from the shaft 12, so that the second guide vane 14 also rotates around the shaft 12. In this way, a uniform drying gas flow field is formed in the drying chamber B to perform the drying process on the isolation membrane S.

[0030] In one embodiment, specifically, the first guide vane 13 and the second guide vane 14 are disposed on the shaft 12 at intervals. Specifically, there is a distance P between the first guide vane 13 and the second guide vane 14, and the distance P can be 2 / 3 to 4 / 5 times the diameter of the shaft 12. At the same time, the angle formed between the first line segment L1 formed by the center of gravity of the first guide vane 13 and the center of gravity of the shaft 12 and the second line segment L2 formed by the center of gravity of the second guide vane 14 and the center of gravity of the shaft 12 is 180°.

[0031] Preferably, the width of the first guide vane 13 on the side away from the shaft 12 is greater than or equal to the diameter of the air inlet 111 and the air outlet 112. Similarly, the width of the second guide vane 14 on the side away from the shaft 12 is greater than or equal to the diameter of the air inlet 111 and the air outlet 112.

[0032] In one embodiment, when a portion of the gas enters the first hollow guide cavity 132 and the second hollow guide cavity 142 through the first micropore 131 and the second micropore 141 respectively, the hollow guide cavity in one side of the guide vane expands, and the micropores expand due to gas compression, while the guide vane on the other side has not yet expanded, and the micropores return to their original state as the gas leaves. Figure 2 As shown, and experimental verification shows that this utility model can reduce the temperature and wind speed distribution difference in the drying chamber B to less than ±5%, and increase the drying rate by about 20% under the same energy consumption conditions.

[0033] In one embodiment, the flow guiding device 1 can be selectively configured at different heights inside the drying chamber B to guide the drying gas in layers, and its quantity can also be varied according to requirements.

[0034] In summary, this utility model discloses a separator coating and drying device with a blade structure featuring a guide surface. By using the guide surface design as a gas guide, a symmetrical and uniform drying gas flow field can be achieved under low energy consumption conditions, thereby improving the drying speed and uniformity of the separator coating. It effectively eliminates problems such as edge curling, wrinkles, and rolling caused by uneven airflow, ensuring that the separator surface is flat and the pore structure is consistent, thus meeting the purpose of this utility model.

[0035] However, the above description is only a preferred embodiment of the present utility model, but it cannot be used to limit the scope of patent protection of the present utility model; therefore, any simple equivalent changes and modifications made in accordance with the scope of patent protection and the contents of the specification of the present utility model shall still fall within the scope of patent protection of the present utility model.

Claims

1. A separator coating and drying device with a blade structure having a guide surface, characterized in that, Include: A drying chamber; and A flow guiding device is disposed inside the drying chamber, the flow guiding device comprising: A hollow columnar structure is provided with an air inlet, an air outlet, a top plate and a bottom plate. The air inlet is connected to a gas output device, and the air inlet and the air outlet are arranged opposite to each other. The top plate is located at one end of the hollow columnar structure and the bottom plate is located at the other end of the hollow columnar structure. Gas is introduced into the hollow columnar structure through the air inlet and discharged through the air outlet. A shaft is located at the center of the hollow columnar structure; A first guide vane is connected to the shaft body. The surface of the first guide vane has a gradually curved profile, so that the surface width of the first guide vane gradually decreases from away from the shaft body to close to the shaft body. and A second guide vane is connected to the shaft body. The second guide vane and the first guide vane are arranged opposite to each other. The surface of the second guide vane has a gradually curved profile, so that the surface width of the second guide vane gradually decreases from away from the shaft body to close to the shaft body. When gas is introduced into the hollow columnar structure, the gas will flow along the surface of the first guide vane and be guided by its curved profile to be discharged towards the shaft, thereby driving the first guide vane to rotate around the shaft. Subsequently, some gas flows along the surface of the second guide vane and is guided by its curved profile to be discharged towards the side of the second guide vane away from the shaft, so that the second guide vane also rotates around the shaft. In one cycle, the first guide vane and the second guide vane can selectively rotate around the axis inside the hollow columnar structure. The air inlet and the air outlet are alternately blocked by the first guide vane and the second guide vane, so that the gas introduced into the drying chamber from the air outlet has a pulse frequency and forms a uniform drying gas flow field in the drying chamber to perform a drying process on a separation membrane.

2. The isolation film coating and drying equipment with a guide curved surface blade structure according to claim 1, characterized in that, The first guide vane and the second guide vane are disposed on the shaft at intervals, and the angle formed between a first line segment formed by the center of gravity of the first guide vane and the center of gravity of the shaft and a second line segment formed by the center of gravity of the second guide vane and the center of gravity of the shaft is 180°.

3. The isolation film coating and drying equipment with a guide curved surface blade structure according to claim 1, characterized in that, The first guide vane and the second guide vane have an arc-shaped region on the side away from the shaft, and the arc degree in the arc-shaped region is less than or equal to 90°.

4. The isolation film coating and drying equipment with a guide curved surface blade structure according to claim 1, characterized in that, The first guide vane and the second guide vane have a torsion angle from the side closer to the shaft to the side farther from the shaft, the torsion angle being between 15° and 30°.

5. The isolation film coating and drying equipment with a guide curved surface blade structure according to claim 1, characterized in that, There is a gap between the first guide vane and the second guide vane.

6. The isolation film coating and drying equipment with a guide surface blade structure according to claim 5, characterized in that, The spacing is 2 / 3 to 4 / 5 times the diameter of the shaft.

7. The isolation film coating and drying equipment with a guide surface blade structure according to claim 1, characterized in that, The first guide vane is provided with a plurality of first micropores and a first hollow guide cavity. The first micropores are disposed on the surface of the first guide vane, and the first hollow guide cavity is connected to the first micropores. When gas flows along the surface of the first guide vane, some gas enters the first hollow guide cavity through the first micropores. The first hollow guide cavity expands to adjust the surface curve of the first guide vane, thereby changing the angle between the gas and the first guide vane.

8. The isolation film coating and drying equipment with a guide curved surface blade structure according to claim 1, characterized in that, The second guide vane is provided with a plurality of second micropores and a second hollow guide cavity. The second micropores are disposed on the surface of the second guide vane, and the second hollow guide cavity is in communication with the second micropores. When the gas flows along the surface of the second guide vane, some of the gas enters the second hollow guide cavity through the second micropores. The second hollow guide cavity expands to adjust the surface curve of the second guide vane, thereby changing the angle between the gas and the second guide vane.

9. The isolation film coating and drying equipment with a guide surface blade structure according to claim 1, characterized in that, The widths of the first guide vane and the second guide vane are greater than or equal to the diameters of the air inlet and the air outlet.

10. The isolation film coating and drying equipment with a guide surface blade structure according to claim 1, characterized in that, The flow guiding device can be selectively configured at different heights inside the drying chamber to guide the drying gas in layers.

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