Wind field device for lithium battery diaphragm production

Abstract

The invention relates to a wind field device for lithium battery diaphragm production, which comprises a box body, an air distributor assembly is arranged in the box body, and the air distributor assembly comprises an air distributor and a static pressure air bellow; the top surface of the air distributor is provided with a plurality of air outlet holes, and the bottom surface of the air distributor is communicated with the static pressure air bellow; the two ends of the static pressure air bellow are communicated with the air inlet pipe, and a through-hole-shaped pressure relief air opening is formed in the side wall of the static pressure air bellow. A flow guide cover is arranged on the pressure relief air opening; an opening of the flow guide cover points to a bottom plate or a top plate of the box body; a top plate of the box body is provided with an air inlet and an air return port which are communicated with the interior; and the air inlet and the air return port are respectively communicated with an external air supply pipe and an external air return pipe. The air inlet is communicated with the air inlet pipe; the baffle is in a straight plate shape and is adjustably mounted on the upper edge and the lower edge of the inlet and the outlet, so that the opening width of the inlet and the opening width of the outlet are reduced. According to the invention, the disorder of an internal wind field caused by air exhaust of the pressure relief opening and the phenomenon of'air channeling 'can be avoided.

Description

Technical Field

[0001] The present invention relates to industrial equipment, in particular to equipment used for producing lithium battery diaphragms, and specifically to a wind farm device used for producing lithium battery diaphragms. Background Art

[0002] During the TDO (Transverse Direction Orientation) process of lithium battery separators, the separator needs to be treated with air blowing. Therefore, the stability of the wind field has an important influence on the permeability, porosity, thickness uniformity, thermal stability and mechanical strength of the separator.

[0003] At present, most of the wind field devices used in TDO are box-shaped, in which air distributors are arranged. The air distributors are opposed to each other up and down, and the diaphragm passes between the air distributors to form a wind field on both sides of the diaphragm. At the same time, pressure relief vents are usually provided on the side walls of the air distributors to adjust the wind pressure in the air distributors. However, two or more groups of air distributors are often provided in the same box. Moreover, the pressure relief vents between adjacent air distributors are in the same horizontal plane and are opposed to each other, causing the gases flowing out of the pressure relief vents to collide with each other and produce a turbulent wind field, which affects the stability of the wind field at the membrane surface of the diaphragm. At the same time, multiple wind field devices are often arranged in the TDO process, and they are close to each other. Each wind field device is provided with a diaphragm inlet and outlet. The opening height of the diaphragm inlet and outlet can reach about 35cm, causing part of the airflow in the box to flow out from the diaphragm inlet and outlet, which can easily cause "wind crossflow" between adjacent wind field devices, resulting in uneven diaphragm surface treatment and affecting the diaphragm's air permeability, thermal shrinkage, porosity and thickness uniformity.

[0004] Therefore, it is urgently needed to be improved in order to better meet the market demand. Summary of the invention

[0005] The purpose of the present invention is to provide a wind field device for lithium battery diaphragm production in view of the shortcomings of the prior art, which can effectively adjust the air outlet direction of the pressure relief vent and improve the wind field stability of the diaphragm membrane surface. At the same time, by installing a partition to adjust the opening width of the diaphragm inlet and outlet, the "wind channeling" problem can be alleviated and eliminated, creating favorable conditions for improving product quality.

[0006] The technical solution of the present invention is: A wind field device for lithium battery diaphragm production includes a box body, in which a blower assembly is arranged, and the blower assembly includes a blower and a static pressure wind box; the blower is in the shape of a long strip tube, and a plurality of air outlet holes are arranged on its top surface, and its bottom surface is connected with the static pressure wind box; the two ends of the static pressure wind box are connected with the air inlet pipe, and a through-hole-shaped pressure relief air outlet is arranged on its side wall; a deflector is arranged on the pressure relief air outlet; the opening of the deflector points to the bottom plate or top plate of the box body; the top plate of the box body is provided with an air inlet and a return air outlet that penetrates the inside thereof; the air inlet and the return air outlet are respectively connected with the external air supply pipe and the return air pipe. The air inlet is connected with the air inlet pipe; a baffle is also included; the baffle is in the shape of a straight plate, and its length is equivalent to the length of the inlet and outlet of the box body, and it is adjustably installed on the upper and lower edges of the inlet and outlet to reduce the opening width of the inlet and outlet.

[0007] Furthermore, the deflector is in the shape of a curved tube, and its longitudinal section is fan-shaped, one end of which is connected to the pressure relief port, and the other end of which is a suspended end and faces the bottom plate or the top plate of the box body.

[0008] Furthermore, there are two or more pressure relief ports located in the middle of the static pressure bellows; a filter is provided on the pressure relief port.

[0009] Furthermore, the air distributor assembly includes two air distributors which are arranged in parallel and at intervals.

[0010] Furthermore, the air inlets are located on both sides of the top plate of the box body; and the return air outlet is located between the two air inlets on the same side.

[0011] Furthermore, the air distributor assemblies are arranged in pairs with upper and lower intervals; the air outlet holes of each of the air distributors are opposite to each other; the same side ports of the static pressure wind boxes of each of the air distributor assemblies are connected to the same air inlet pipe; the suspended ends of the air guide cover at the top and the air guide cover at the bottom are oriented away from each other.

[0012] Furthermore, two pairs of the air distribution device assemblies are provided in the box body, which are parallel to each other and spaced apart.

[0013] Furthermore, the baffle is provided with a plurality of mounting holes; the mounting holes are vertical long holes, which are evenly arranged along the length direction of the baffle; screw holes are provided on the box walls of the inlet and outlet of the box, so that screws can be passed through the mounting holes and then screwed onto the screw holes, so that the baffle is fixed to the box along the length direction of the inlet and outlet of the box, and the opening width of the inlet and outlet is reduced.

[0014] Furthermore, it also includes a silicone strip, whose end face is in the shape of a "9" and whose length is less than the length of the baffle; the proximal end of the baffle is provided with a mounting groove arranged along its length direction; the mounting groove is in the shape of a groove, its top end is open, its two ends are through, and its width is less than the thickness of the silicone strip; the tail end of the silicone strip is embedded in the mounting groove.

[0015] Furthermore, a fume exhaust port which is communicated with the interior of the box is provided at the center of the top plate of the box.

[0016] Beneficial effects of the present invention: The present invention has a reasonable design, compact structure, and convenient operation. By setting a deflector cover at the pressure relief vent, the pressure relief airflow is directed to the top plate and bottom plate of the box body, which effectively solves the problem of turbulent wind field in the past, making the diaphragm heated and the gas distribution more uniform. At the same time, by adding adjustable baffles at the inlet and outlet of the box body, the "wind channeling" phenomenon is greatly improved, and the stability of the wind field in the box body is further improved, creating favorable conditions for improving the quality of diaphragm products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the appearance of the present invention.

[0018] Figure 2 It is a schematic diagram of the internal structure of the present invention (without an air distribution device assembly located at the top).

[0019] Figure 3 It is a structural schematic diagram of the baffle of the present invention.

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0022] Among them, 1-box; 2-exhaust outlet; 3-air inlet; 4-return air outlet; 5-baffle; 6-installation hole; 7-track; 8-inspection door; 9-air inlet duct; 10-air distributor; 11-static pressure bellows; 12-air deflector; 13-silicone strip; 14-installation slot. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figures 1 to 5 shown.

[0025] The present invention discloses a wind farm device for producing lithium battery diaphragms, comprising a box body 1 and a baffle 5.

[0026] The box body 1 is a rectangular cube, and an inlet and an outlet are respectively provided on the front and rear end panels for the diaphragm to enter and exit the box body. An air inlet 3, a return air outlet 4 and an oil fume exhaust port 2 are provided on the top plate of the box body 1. The air inlet 3 and the return air outlet 4 are respectively connected to the supply air duct and the return air duct in the external circulating air system. Preferably, there are multiple air inlets 3 and return air outlets 4, which are located on both sides of the top plate. The oil fume exhaust port 2 is located in the center of the top plate and is connected to the exhaust pipe to discharge the oil fume and the like in the box body. An inspection door 8 is respectively provided on both sides of the box body 1 to facilitate manual entry into the box body for maintenance.

[0027] The box body 1 is provided with an air distributor assembly. The air distributor assembly includes an air distributor 10 and a static pressure wind box 11. The air distributor 10 is in the shape of an elongated tube, the length of which is greater than the width of the diaphragm, the cross section of which is rectangular, the top surface of which is provided with a plurality of air outlet holes, and the bottom surface of which is connected to the static pressure wind box 11. The aperture of the air outlet hole is about 1 mm, and it is arranged in a honeycomb shape. The length of the static pressure wind box 11 is equivalent to the length of the air distributor 10, and both ends of the static pressure wind box 11 are connected to the air inlet 9. Moreover, the static pressure wind box 11 is connected to the air inlet 3 so that the external circulating air can be sent into the static pressure wind box. After being buffered by the static pressure wind box, the air flow is stabilized and then sent into the box body through the air distributor. Then, the air in the box enters the return air duct through the return air port and flows back to the circulating air system. Preferably, the air distributor assembly includes two air distributors 10, which are arranged in parallel and spaced apart so that their total area is smaller than the area of ​​the static pressure wind box, so as to increase the wind pressure of the air distributor and improve the blowing effect on the membrane surface.

[0028] The air distribution device assemblies are arranged in pairs with an interval between the upper and lower parts, and the air outlet holes of each air distribution device 11 are opposite to each other, so that when the diaphragm passes between the air distribution devices, the upper and lower surfaces thereof can be blown by the air outlet from the air distribution devices at the same time. Preferably, the same side ports of the static pressure wind boxes 11 of each air distribution device assembly are connected to the same air inlet pipe 9 to ensure that the air supply pressure entering the air distribution devices from both ends is the same.

[0029] Two pairs of four air distributor assemblies are provided in the box 1. Each pair of air distributor assemblies is parallel to each other and spaced apart to ensure that the diaphragm can be fully blown when passing through, thereby improving production efficiency and product quality. At the same time, in this embodiment, there are four air inlets 3, which are symmetrically arranged on both sides of the top plate of the box 1, and are respectively connected to the air inlet pipes of each pair of air distributor assemblies. There are two return air vents 4, which are respectively arranged on both sides of the top plate of the box and placed between the two air inlets 3 on the same side.

[0030] The side wall of the static pressure wind box 11 is provided with a through-hole-shaped pressure relief port, so that the air supply in the static pressure wind box can be properly leaked so that the internal pressure can meet the use requirements. There are two or more pressure relief ports on each side, which are located in the middle of the static pressure wind box, so that the air pressure in the static pressure wind box is uniform. The number and size of the pressure relief ports depend on the size of the static pressure wind box.

[0031] The pressure relief vent is provided with a guide hood 12. The guide hood 12 is in the shape of a curved tube, and its longitudinal section is fan-shaped. One end of the guide hood 12 is connected to the pressure relief vent, and the other end is a suspended end facing the bottom plate or top plate of the box body 1, so as to guide the outflowing wind flow to the bottom plate or top plate of the box body 1, that is, the suspended end of the guide hood at the top is opened toward the top plate of the box body, and the suspended end of the guide hood at the bottom is opened toward the bottom plate of the box body. Thereby, not only can the airflow collision between the upper and lower air distribution unit assemblies of the same pair be avoided, but also the airflow collision between adjacent air distribution unit assemblies can be avoided, so as to ensure the stability of the wind field in the box body. Preferably, a filter is also provided on the pressure relief vent to filter impurities in the outflowing air to avoid pollution to the box body.

[0032] The baffle 5 is in the shape of a straight plate, and its length is equivalent to the length of the inlet and outlet of the box, and a plurality of mounting holes 6 are provided on it. The mounting holes 6 are vertical long holes, and are evenly arranged along the length direction of the baffle 5. At the same time, screw holes are provided on the box wall of the inlet and outlet of the box 1, so that screws can be passed through the mounting holes and then screwed onto the screw holes, so that the baffle 5 is fixed to the box along the length direction of the inlet and outlet of the box, and the opening width of the inlet and outlet is reduced from 35cm to 5cm, which effectively reduces the flow of air inside and outside the inlet and outlet of the box, and reduces the "wind blowing" phenomenon. At the same time, by moving the mounting hole 6 up and down along the screw, the position of the baffle 5 can be adjusted, thereby changing the opening width of the inlet and outlet to meet production needs.

[0033] Furthermore, the present invention also includes a silicone strip 13. The silicone strip 13 is in the shape of a long strip, and its end face is in the shape of a "9", and its length is equivalent to the length of the baffle 5. At the same time, the end of the baffle 5 located between the inlet and the outlet is provided with a mounting groove 14 arranged along its length direction. The mounting groove 14 is in the shape of a groove, with an open top and through ends, and its width is smaller than the thickness of the tail end of the silicone strip 13, so that the tail end of the silicone strip 13 can be embedded in the mounting groove 14 to prevent the membrane surface from being scratched due to contact with the baffle when the diaphragm passes through the inlet and the outlet.

[0034] As a conventional arrangement, the box 1 is further provided with structures such as tracks 7 and chain clamps. The tracks 7 are two in number, arranged in parallel and perpendicular to the inlet and outlet. The chain clamps are arranged on the tracks, can clamp both sides of the diaphragm, and move along the tracks to allow the diaphragm to pass through the box.

[0035] The working process of the present invention is: The external circulating air system generates circulating air with a certain temperature through fans, heat exchangers, etc. After the circulating air enters the air inlet pipe through the air supply duct, it is first buffered by the static pressure bellows, and then flows into the box after the air distributor, blowing on the surface of the diaphragm passing through it. Then, the air in the box enters the return air duct through the return air port, and flows back to the external circulating air system again. After heat exchange, it flows into the box again and circulates. In the meantime, the pressure in the static pressure bellows can be effectively adjusted to meet production needs through the exhaust of the pressure relief air port. At the same time, due to the role of the deflector, the air outlets of the pressure relief air port can be prevented from colliding with each other, causing the wind field in the box to be turbulent, ensuring the smooth progress of production in this section.

[0036] Since the diaphragm will carry more or less paraffin oil and extraction solvent when entering this process, some of the paraffin oil and extraction solvent may form oil smoke under the high temperature environment of the box. When the oil smoke rises to the top of the box, it can be discharged from the oil smoke exhaust port to prevent the air inside the box from being polluted.

[0037] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A wind farm device for lithium battery diaphragm production, comprising a box body, wherein a wind distributor assembly is arranged in the box body, wherein: The air distributor assembly includes an air distributor and a static pressure wind box; the air distributor is in the shape of an elongated tube, with a plurality of air outlet holes on its top surface, and its bottom surface is connected to the static pressure wind box; both ends of the static pressure wind box are connected to the air inlet pipe, and a through-hole-shaped pressure relief air outlet is provided on its side wall; a deflector is provided on the pressure relief air outlet; the opening of the deflector points to the bottom plate or top plate of the box; the top plate of the box is provided with an air inlet and a return air outlet that penetrate the interior thereof; the air inlet and the return air outlet are respectively connected to the external air supply pipe and the return air pipe. The air inlet is connected to the air inlet pipe; a baffle is also included; the baffle is in the shape of a straight plate, with a length equivalent to that of the inlet and outlet of the box, and can be adjusted to be installed at the upper and lower edges of the inlet and outlet so as to reduce the opening width of the inlet and outlet.

2. The wind farm device for lithium battery separator production according to claim 1, characterized in that: The deflector is in the shape of a curved tube, and its longitudinal section is fan-shaped. One end of the deflector is connected to the pressure relief port, and the other end is a suspended end facing the bottom plate or the top plate of the box body.

3. The wind farm device for lithium battery separator production according to claim 1, characterized in that: There are two or more pressure relief ports located in the middle of the static pressure bellows; a filter is provided on the pressure relief port.

4. The wind farm device for lithium battery separator production according to claim 1, characterized in that: The air distributor assembly comprises two air distributors which are arranged in parallel and at intervals.

5. The wind farm device for lithium battery separator production according to claim 1, characterized in that: The air distribution device assemblies are arranged in pairs with upper and lower intervals; the air outlet holes of each air distribution device are opposite to each other; the same side ports of the static pressure wind boxes of each air distribution device assembly are connected to the same air inlet pipe; the suspended ends of the air guide cover at the top and the air guide cover at the bottom are oriented away from each other.

6. The wind farm device for lithium battery separator production according to claim 5, characterized in that: Two pairs of the air distribution device components are arranged in the box body, parallel to each other and spaced apart.

7. The wind farm device for lithium battery separator production according to claim 6 is characterized in that: The air inlets are located on both sides of the top plate of the box body; and the return air outlet is located between the two air inlets on the same side.

8. The wind farm device for lithium battery separator production according to claim 1, characterized in that: The baffle is provided with a plurality of mounting holes; the mounting holes are vertical long holes and are evenly arranged along the length direction of the baffle; screw holes are provided on the box wall at the inlet and outlet of the box, so that screws can be passed through the mounting holes and then screwed onto the screw holes, so that the baffle is fixed to the box along the length direction of the inlet and outlet of the box, and the opening width of the inlet and outlet is reduced.

9. The wind farm device for lithium battery separator production according to claim 1, characterized in that: It also includes a silicone strip, whose end face is in the shape of a "9" and whose length is less than the length of the baffle; the proximal end of the baffle is provided with a mounting groove arranged along its length direction; the mounting groove is in the shape of a groove, whose top end is open, whose two ends are through, and whose width is less than the thickness of the silicone strip; the tail end of the silicone strip is embedded in the mounting groove.

10. The wind farm device for lithium battery separator production according to claim 1, characterized in that: A fume exhaust port which is communicated with the interior of the box is arranged at the center of the top plate of the box.

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