CN220741874U - Battery diaphragm apparatus for producing - Google Patents

Abstract

The application provides a battery diaphragm apparatus for producing, including die head, chill roll and the cooling module that is used for extruding the fuse-element. The chilling roller is used for attaching and cooling the melt extruded by the die head; the cooling module comprises a liquid cooling groove and an air cooling module arranged at one side of the chilled roller; the air outlet of the air cooling module is arranged towards the chilled roller, and the air outlet is positioned between the die head and the liquid cooling tank, so that the melt sequentially passes through the air outlet and the liquid cooling tank when rotating along with the chilled roller. The battery diaphragm production device provided by the technical scheme is used for producing the diaphragm, and the quality of the manufactured diaphragm can be improved from the aspect of physical property consistency of the diaphragm and appearance of the diaphragm.

Description

Battery diaphragm apparatus for producing

Technical Field

The application relates to the field of lithium battery production, in particular to a battery diaphragm production device.

Background

The lithium ion battery diaphragm is divided into two main types of dry method and wet method according to the different preparation process, the wet method is to mix polypropylene (PP) or Polyethylene (PE) with white oil, after heating and melting through an extruder, form uniform melt mixture, then cool through casting process to carry out phase separation, prepare the diaphragm containing micropore, then heat the diaphragm to the temperature close to the melting point, carry out biaxial stretching to orient and arrange molecular chains, finally keep warm for a certain time, elute residual solvent with volatile matters, and prepare the mutually communicated microporous membrane material.

At present, a common method for thermally induced phase separation in a casting process is to use a chill roll, set the temperature of the chill roll, attach the melt flowing out of a die head to the chill roll, enable the melt to be rapidly cooled, and enable white oil to be rapidly separated from PE/PP, so that micropores are formed.

When the melt is attached to the chill roll by using the method of the chill roll, the temperature of the air is inconsistent with that of the chill roll, the phase separation rate of the front surface and the back surface is inconsistent, the crystallization rate is inconsistent, the consistency of the physical properties of the film is further affected, and the appearance of the produced diaphragm is adversely affected.

Disclosure of Invention

The purpose of the present application is to provide a battery separator production device to improve the quality of the produced separator.

Embodiments of the present application are implemented as follows:

in a first aspect, embodiments of the present application provide a battery separator production apparatus, including a die head for extruding a melt, a chilled roller, and a cooling module;

the chilling roller is used for attaching and cooling the melt extruded by the die head;

the cooling module comprises a liquid cooling groove and an air cooling module arranged at one side of the chilled roller;

the air outlet of the air cooling module is arranged towards the chilled roller, and the air outlet is positioned between the die head and the liquid cooling tank, so that the melt sequentially passes through the air outlet and the liquid cooling tank when rotating along with the chilled roller.

After the melt is extruded by the die head, the air cooling module can blow air to the melt attached to the chilling roller, and the chilling roller and the blown air cool the front surface and the back surface of the melt at the same time, so that the temperature change of the front surface and the back surface of the melt is more consistent, the phase separation rate and the crystallization rate of the front surface and the back surface of the melt are more consistent, and the physical property consistency of the prepared diaphragm can be improved.

When the battery diaphragm production device provided by the technical scheme is adopted, the melt can be initially cooled through the chilling roller and the air cooling module, and then the melt is further cooled through the liquid in the liquid cooling tank. In the process of producing the diaphragm by adopting the device provided by the technical scheme, the number of times of cooling the melt is more, so that the gradient of the temperature change of the melt is smaller, and the physical property consistency of the prepared diaphragm can be improved.

In addition, through setting up the forced air cooling module, can realize reducing the temperature of fuse-element below the boiling point of the coolant liquid in the liquid cooling groove to avoid leading to the coolant liquid boiling when fuse-element and coolant liquid contact, reduced the influence that causes the outward appearance of the diaphragm of making. In summary, the battery separator production device provided by the above technical scheme can improve the quality of the produced separator in terms of the physical property consistency of the separator and the appearance of the separator.

In combination with the first aspect, in some embodiments, the device further comprises a suction module, wherein the suction module comprises a wind collecting hood and an air extractor which are connected with each other through a pipeline, and the wind collecting hood is arranged on one side of the die head away from the air outlet, so that gas at the position of the die head is sucked through the wind collecting hood through the air extractor.

According to the technical scheme, the air collecting cover and the air extractor are arranged on one side, far away from the air outlet, of the die head, so that oil smoke generated when the die head extrudes melt can be sucked away, and the influence on production environment is reduced; meanwhile, the air pressure between the melt and the chilling roller is lowered, so that the melt is attached to the surface of the chilling roller.

With reference to the first aspect, in some embodiments, the air cooling module includes an air outlet cover, a fan, and a refrigeration assembly, where the fan is configured to convey air output by the refrigeration assembly to the air outlet cover, the air outlet is located on the air outlet cover, and the air outlet of the air outlet cover and the air inlet of the air collecting cover are disposed on opposite sides of the die head.

According to the technical scheme, the air outlet of the air outlet cover and the air inlets of the air collecting cover are arranged on the two sides of the die head, so that the air blown out by the air outlet cover can be prevented from being directly sucked away by the air collecting cover to a certain extent, and the influence of the air suction module on the cooling effect is reduced; and a low pressure zone can be formed at the discharge port of the die head so that the melt can better fit the surface of the chilled roller.

In combination with the first aspect, in some embodiments, a sealing member is further disposed between the air collecting hood and the discharge port of the die head, the sealing member extends along the length direction of the discharge port of the die head, one side of the sealing member is connected with the air collecting hood, and the other side is connected with the die head.

According to the technical scheme, the sealing piece is arranged between the air collecting cover and the discharge hole of the die head, so that a low-pressure area can be formed in the position of the discharge hole of the die head better through the air suction effect of the air collecting cover, oil smoke can be better sucked, and the melt can be attached to the surface of the chilling roller better through the formed low-pressure environment.

With reference to the first aspect, in some embodiments, the air suction module further includes a first filtering device, and the first filtering device is connected to the refrigeration assembly through a pipe, so that the air sucked from the air collecting hood is filtered by the first filtering device and then output to the refrigeration assembly.

In the above technical scheme, the first filtering device can be used for filtering the gas sucked by the air collecting cover, then the filtered gas is sent to the refrigerating assembly for cooling, and the cooled gas is used for cooling the melt. That is, a part of the air blown out from the blower reaches the air extractor, so that the power consumption of the blower can be reduced.

In combination with the first aspect, in some embodiments, a side of the air outlet facing the die head is provided with a baffle extending toward the chill roll.

According to the technical scheme, the baffle extending towards the chilling roller is arranged on one side of the air outlet cover, facing the die head, so that the air blown out from the air outlet cover can be prevented from moving towards the die head to a certain extent, and further the influence on the size of a melt extruded out from the die head is avoided; meanwhile, the cold air blown out through the air outlet cover is prevented from being too dispersed, and the cooling effect is reduced.

With reference to the first aspect, in some embodiments, the air outlet is configured to be 5-30 cm from the melt extruded from the die.

In the technical scheme, the air outlet is arranged within the range of 5-30 cm away from the melt extruded by the die head, so that the cooling effect on the melt can be better achieved.

With reference to the first aspect, in some embodiments, the outlet cover incorporates a second filter device.

According to the technical scheme, the second filtering device is covered on the air outlet, so that impurities of the air blown out from the air outlet can be filtered out, and the quality of the produced diaphragm is prevented from being influenced. In addition, because the second filter equipment lid closes in the air outlet, can make the inside gas of air-out cover blow to the fuse-element more evenly, and then make the temperature variation of fuse-element more even, the physical property uniformity is better.

In combination with the first aspect, in some embodiments, the air outlet cover is composed of a top plate, a bottom plate, side plates and a back plate, the top plate, the bottom plate and the side plates enclose the air outlet cover, the second filtering device is arranged opposite to the back plate, and the fan is connected with the air outlet cover from the top plate or the side plates or the bottom plate through a pipeline.

Among the above-mentioned technical scheme, the pipeline with the fan intercommunication is not connected in the backplate that sets up relatively with the second filter equipment, consequently, can avoid directly blowing to the second filter equipment under the effect of fan, further makes the gas in the collection fan housing blow to the fuse-element more evenly.

With reference to the first aspect, in some embodiments, an air outlet of the air cooling module is provided with a rotatable baffle to change a movement direction of the air after being blown out from the air outlet.

According to the technical scheme, the guide plate is arranged to change the movement direction of the blown gas, so that an operator can conveniently adjust the air flow according to actual conditions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a part of a structure of a battery separator production device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an air outlet cover according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an air outlet provided by the embodiment of the present application with a deflector.

Icon: 100-die head; 200-chilling roller; 300-melt; 400-liquid cooling tank; 500-air cooling module; 510, an air outlet cover; 511-air outlet; 512-top plate; 513-a bottom plate; 514-side plates; 515-baffle; 520-fans; 530-a refrigeration assembly; 600-getter module; 610-a wind collecting hood; 611-air inlet; 620-an air extractor; 630-seals; 710-a first filtration device; 720-a second filtering means; 730-a third filtration device; 810-a first baffle; 820-second baffle.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of description of the present application and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Embodiments of the present application provide a battery separator production apparatus, as shown in fig. 1, comprising a die head 100 for extruding a melt 300, a chilled roll 200 for cooling the melt 300 extruded from the die head 100, and a cooling module. Wherein chill roll 200 is used to attach and cool melt 300 extruded from die 100, in some alternative embodiments, chill roll 200 is positioned below die 100 such that melt 300 extruded from die 100 adheres to the surface of chill roll 200 for cooling. In other embodiments, chill roll 200 may be positioned at other alternative locations, such as diagonally below die 100.

The cooling module that this application provided is including setting up in the air-cooled module 500 of chill roll 200 one side, wherein, the air outlet 511 of air-cooled module 500 sets up towards chill roll 200, when the fuse-element 300 that makes die head 100 extrude is attached to chill roll 200, the gas that blows out by chill roll 200 and air outlet 511 cools off the front and the reverse side of fuse-element 300 jointly, can realize the front of fuse-element 300 and the temperature variation of reverse side unanimously, and then make the front of fuse-element 300 and the phase separation rate and the crystallization rate of reverse side more unanimous, can improve the physical property uniformity of the diaphragm of making. The temperature of the gas blown out from the air outlet 511 can be adjusted according to actual needs by those skilled in the art.

In some embodiments, the cooling module further includes a liquid cooling tank 400. Specifically, as shown in fig. 1, the liquid cooling tank 400 is located below the chilled roll 200, and the lower end of the chilled roll 200 is located within the liquid cooling tank 400. The air outlet 511 is located between the die head 100 and the liquid cooling tank 400, specifically above the liquid cooling tank 400, and the melt 300 extruded by the die head 100 is attached to the surface of the chilled roll 200. The melt 300 passes through the air outlet 511 before entering the liquid cooling tank 400 during rotation with the chilled roll 200. During the production process, a cooling liquid may be added to the liquid cooling tank 400, and the lower end of the chilled roll 200 may be immersed in the cooling liquid.

In the process of producing the separator by using the battery separator production device provided in the above embodiment, the melt 300 may be initially cooled by using the gas blown out by the chill roll 200 and the air outlet 511, and then the melt 300 may be further cooled by using the cooling liquid. An operator can select and reasonably control the temperature of the chilled roller 200 and the temperature of the air blown out by the air outlet 511 according to actual needs, so that on one hand, the temperature of the melt 300 can be firstly reduced to be lower than the boiling point of the cooling liquid, and the influence on the appearance of the manufactured diaphragm is avoided; on the other hand, the temperature gradient of the melt 300 can be smaller, and the consistency of materials for preparing the diaphragm is further improved.

In some embodiments of the present application, the air cooling module 500 includes an air outlet cover 510 disposed on one side of the chilled roller 200, and the air outlet cover 510 is connected with a fan 520 and a refrigeration assembly 530 through a pipe. The air outlet 511 of the air cooling module 500 is located at the air outlet cover 510.

In the present application, the sequence of the air passing through the fan 520 and the refrigeration assembly 530 is not limited, as long as the fan 520 can send the air processed by the refrigeration assembly 530 to the air outlet cover 510. In some embodiments, the air outlet cover 510, the fan 520 and the refrigeration assembly 530 may be sequentially connected through a pipeline, as shown in fig. 1, where the fan 520 blows air located at one end of the refrigeration assembly 530 toward one end of the air outlet cover 510, so that the air is cooled by the refrigeration assembly 530 and then blown toward the air outlet cover 510. In other embodiments, the air outlet cover 510, the refrigeration assembly 530 and the fan 520 may be sequentially arranged, that is, the fan 520 blows air to the refrigeration assembly 530, and the air moves to the air outlet cover 510 after passing through the refrigeration assembly 530.

In one embodiment of the battery separator production apparatus provided herein, the battery separator production apparatus further includes a suction module 600, and the suction module 600 includes a wind collecting hood 610 and a suction fan 620 connected to each other through a pipe. Wherein, the air collecting hood 610 is disposed at a side of the die head 100 away from the air outlet 511, such that the melt 300 is located between the air collecting hood 610 and the air outlet 511 when being extruded from the die head 100, so that the air at the position of the die head 100 is sucked through the air collecting hood 610 by the air pump 620. It should be understood by those skilled in the art that in the process of manufacturing the battery separator by wet process, PP, PE and white oil are mixed and then heated to be extruded from the die 100, so that oil smoke may occur at the position of the die 100, and the oil smoke may be sucked away by providing the air collecting hood 610, and meanwhile, a low pressure area may be formed near the discharge hole of the die 100, so that the effect of attaching the melt 300 on the chilled roller may be improved.

In order to better form the low pressure zone near the exit of die 100, in some preferred embodiments of the present application, as shown in fig. 1, a seal 630 (a structural member shown in the black part of the drawing) is further provided between the air collection hood 610 and the exit of die 100, and one side of seal 630 is connected to the air collection hood 610 and the other side is connected to die 100. By providing a seal 630, as shown in fig. 1, more gas is drawn in by the hood 610 from the exit location of the die head 100, which on the one hand allows better oil smoke extraction and on the other hand allows lower pressure at the extrusion location of the die head 100, i.e., lower pressure on the side of the melt 300 near the chill roll 200, which allows better adhesion of the melt 300 to the chill roll 200.

The specific structure of the air collecting hood 610 is not limited in the present application, and further, the air collecting hood 610 has an air inlet 611 into which air enters, so long as the air inlet 611 is disposed near the position of the die 100, the structure and the disposition position of the solid portion of the air collecting hood 610 may be adaptively designed according to the actual situation.

In the above embodiments, the air outlet cover 510 is used for blowing air, the air collecting cover 610 is used for sucking air, in order to avoid the influence of the air sucking process of the air collecting cover 610 on the air blowing process of the air outlet cover 510, so that part of the air blown out by the air outlet cover 510 is directly sucked away by the air collecting cover 610, and cannot reach the surface of the melt 300 to achieve the effect of cooling the melt 300, and the temperature control of the melt 300 is adversely affected, therefore, in some preferred embodiments, the air inlet 611 of the air collecting cover 610 and the air outlet 511 of the air outlet cover 510 are disposed on opposite sides of the die 100. It should be understood by those skilled in the art that the die 100 has a plate-shaped structure, and during the production process, the die 100 and the melt 300 are located between the air inlet 611 of the air collecting hood 610 and the air outlet 511 of the air outlet hood 510, so as to separate the air inlet 611 from the air outlet 511, thereby effectively preventing the air blown by the air outlet hood 510 from being directly sucked away by the air collecting hood 610, and better forming the low pressure area between the melt 300 and the chill roll 200.

It should be understood to those skilled in the art that the discharge port of the die 100 is provided with a metal material structural member, the temperature of the discharge port of the die 100 is higher, and the application blows out the gas with lower temperature through the air outlet cover 510 to cool the melt 300, if the air outlet cover 510 blows out the gas to act on the die 100, the discharge port of the die 100 may be cooled and then the size is reduced, so that the thickness of the manufactured diaphragm is affected.

Accordingly, in other embodiments provided herein, to reduce the likelihood of the gas exiting the vents 511 acting on the die 100, a baffle 515 is provided on the side of the hood 510 facing the die 100, the baffle 515 extending toward the chill roll 200. It should be understood by those skilled in the art that the air outlet 511 of the air outlet cover 510 is located at one side of the baffle 515, the die head 100 is located at the other side of the baffle 515, the air outlet 511 is separated from the die head 100 by the baffle 515, and the air outlet boundary of the air outlet cover 510 is further limited, so that cold air is not directly blown to the die head 100, the amount of air flowing from the air outlet 511 to the discharge outlet of the die head 100 can be reduced, and the situation that the size of the manufactured diaphragm is affected due to the size change caused by the cold occurrence of the discharge outlet of the die head 100 is avoided.

Further, in some embodiments of the present application, the distance between the air outlet 511 of the air outlet cover 510 and the melt 300 extruded by the die head 100 is reasonably controlled, so that the air blown out by the air outlet cover 510 is directly blown to the melt 300, and further, the blown air is effectively prevented from directly moving to the die head 100. After the gas blown out of the hood 510 contacts the melt 300, the temperature of the melt 300 is lowered, the temperature of the gas is raised, and the gas after the temperature is raised is difficult to cause the size of the discharge port of the die 100 to be reduced due to cooling. In addition, the cooling effect on the melt 300 can be ensured by reasonably controlling the interval between the air outlet 511 of the air outlet cover 510 and the melt 300 extruded from the die head 100. Preferably, the distance between the air outlet 511 of the air outlet cover 510 and the melt 300 is in the range of 5-30 cm.

In some embodiments of the present application, the second filtering device 720 is covered at the air outlet 511 of the air outlet cover 510, and the specific structure of the second filtering device 720 is not limited in the present application, and in some embodiments, the second filtering device 720 may be a plate-shaped structure, such as an existing structure of a gas filter screen. By providing the second filtering device 720, on one hand, the gas can be filtered and then blown out of the air outlet cover 510, so that the adverse effect of impurities in the gas on the surface quality of the melt 300 can be reduced; on the other hand, since the second filter 720 is a plate-shaped structure, the side of the second filter 720 facing the inside of the air outlet cover 510 is a plane, and the gas inside the air outlet cover 510 can vertically and uniformly pass through the second filter 720, and thus uniformly blow from the air outlet 511 toward the melt 300. It should be understood by those skilled in the art that the second filtering device 720 should have a fine microporous structure to filter impurities in the gas, and when the second filtering device 720 is covered on the air outlet 511, the air pressure inside the air outlet cover 510 is greater than the air pressure outside, and the air pressure inside the air outlet cover 510 uniformly acts on the second filtering device 720, so that the gas can be uniformly discharged after passing through the second filtering device 720. In one embodiment of the present application, the second filter 720 is a plate-like structure composed of a polyester filter mesh, a polyester fiber air filter cotton, and a filter frame.

Further, in some embodiments, the air outlet cover 510 is composed of a top plate 512, a bottom plate 513, a side plate 514, and a back plate, wherein the top plate 512, the bottom plate 513, and the side plate 514 enclose an air outlet 511 of the air outlet cover 510, the air outlet 511 and the back plate are respectively located at two opposite sides of the air outlet cover 510, and the second filtering device 720 is disposed opposite to the back plate. The top plate 512 and the bottom plate 513 in the present application are plate-shaped structural members respectively located at the upper portion and the lower portion of the air outlet cover 510 in the actual production process, the side plate 514 is a plate-shaped structural member located between the top plate 512 and the bottom plate 513, the shape of the air outlet 511 is not particularly limited in the present application, and accordingly, the number of the side plates 514 is not limited, as shown in fig. 2, in an embodiment in which the air outlet cover 510 includes two oppositely arranged side plates 514, and the air outlet 511 of the air outlet cover 510 is quadrilateral. In a preferred embodiment of the present application, the top plate 512 of the outlet cowl 510 is the same structural member as the baffle 515.

Since the air outlet cover 510 is connected with a pipe, the fan 520 sends air into the air outlet cover 510 through the pipe, and the air outlet 511 of the air outlet cover 510 is covered with the second filtering device 720, in some preferred embodiments, the pipe is connected to a plate-shaped structural member of a non-back plate that forms the air outlet cover 510 to send air into the air outlet cover 510. For example, the duct is connected to the inside of the air outlet cover 510 from the top plate 512 or the side plate 514 or the bottom plate 513, so as to avoid that the air entering the air outlet cover 510 from the duct moves directly to the second filtering device 720, so that the partial position on the second filtering device 720 is subjected to excessive pressure, and the flow rate of the air passing through different positions on the second filtering device 720 is different, so that the cooling effect on different positions on the melt 300 is different, and the difference of the thermally induced phase separation speeds of the front and the back of the melt 300 is not good.

In order to utilize the gas sucked by the suction module 600, in some embodiments of the present application, the suction module 600 further includes a first filtering device 710, where the first filtering device 710 is disposed on a pipeline connected to the air collecting hood 610, so as to filter the gas sucked by the air collecting hood 610. The first filtering device 710 is further connected with the refrigerating assembly 530 through a pipeline, so that gas inhaled by the air collecting cover 610 is discharged from the air outlet cover 510 after sequentially passing through the first filtering device 710 and the refrigerating assembly 530, the effect of cooling the melt 300 is achieved, and the gas inhaled by the air collecting cover 610 is utilized. That is, as shown in fig. 1, the air collecting cover 610 is connected with the air extractor 620 through a pipeline, the air extractor 620 is connected with the refrigerating assembly 530 through a pipeline, the refrigerating assembly 530 is connected with the fan 520 through a pipeline, and the fan 520 is connected with the air outlet cover 510 through a pipeline. In this application, the structure of the first filtering device 710 may be the same as that of the second filtering device 720.

In the above embodiment, the gas sucked by the air pump 620 is also used to cool the melt 300, and accordingly, the amount of the gas sucked by the fan 520 can be reduced, thereby reducing the power consumption of the fan 520.

In this application, the specific composition of the refrigeration assembly 530 is not limited, and in one embodiment, the refrigeration assembly includes a compressor, a condenser, and an evaporator connected to each other. Accordingly, a third filter device 730 may be provided between the refrigeration assembly 530 and the outlet housing 510 to filter the gas entering the outlet housing 510. In this application, the structure of the third filter device 730 may be the same as that of the second filter device 720.

In some embodiments of the present application, as shown in fig. 3, a rotatable baffle is further disposed at the position of the air outlet 511 of the air outlet cover 510 to change the movement direction of the air after being blown out from the air outlet. Illustratively, the baffle includes a first baffle 810 and a second baffle 820 to change the direction of movement of the gas after it is blown out of the outlet 511 in both directions. Further, the first baffle 810 rotates in an axial direction around the vertical direction, and the second baffle 820 rotates around an axis in the horizontal direction to adjust the movement direction of the gas after being blown out of the air outlet 511 in two orthogonal directions. The use of baffles to adjust the direction of flow of the gas is already known in the art and will not be described in detail in this application.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (9)

1. The battery diaphragm production device is characterized by comprising a die head for extruding a melt, a chilled roller, a cooling module and an air suction module;

the chilling roller is used for attaching and cooling the melt extruded by the die head;

the cooling module comprises a liquid cooling groove and an air cooling module arranged at one side of the chilled roller;

the air outlet of the air cooling module is arranged towards the chilled roller, and the air outlet is positioned between the die head and the liquid cooling groove, so that the melt sequentially passes through the air outlet and the liquid cooling groove when rotating along with the chilled roller;

the air suction module comprises an air collection cover and an air extractor which are connected with each other through a pipeline, wherein the air collection cover is arranged on one side, far away from the air outlet, of the die head, and the air at the position of the die head is sucked through the air extractor through the air collection cover.

2. The battery diaphragm production device of claim 1, wherein the air cooling module comprises an air outlet cover, a fan and a refrigerating assembly, the fan is used for conveying air output by the refrigerating assembly to the air outlet cover, the air outlet is positioned on the air outlet cover, and the air outlet and the air inlet of the air collecting cover are arranged on two opposite sides of the die head.

3. The battery separator production device according to claim 2, wherein a sealing member is further provided between the air collecting hood and the discharge port of the die head, the sealing member extends in the length direction of the discharge port of the die head, and one side of the sealing member is connected with the air collecting hood, and the other side is connected with the die head.

4. The battery separator production apparatus of claim 3, wherein the suction module further comprises a first filter device connected to the refrigeration assembly through a pipe so that the gas sucked from the air collection hood is filtered by the first filter device and then outputted to the refrigeration assembly.

5. The apparatus of any one of claims 1-4, wherein a side of the air outlet facing the die head is provided with a baffle extending toward the chill roll.

6. The apparatus according to any one of claims 1 to 4, wherein the air outlet is arranged 5 to 30cm from the melt extruded from the die.

7. The battery separator production unit of any one of claims 2-4 wherein the outlet cover incorporates a second filter means.

8. The battery separator production device according to claim 7, wherein the air outlet cover is composed of a top plate, a bottom plate, side plates and a back plate, the top plate, the bottom plate and the side plates enclose the air outlet cover, the second filter device is arranged opposite to the back plate, and the fan is connected with the air outlet cover from the top plate or the side plates or the bottom plate through a pipeline.

9. The apparatus according to any one of claims 1 to 4, wherein the air outlet is provided with a rotatable deflector to change the direction of movement of the air after being blown out from the air outlet.