A diaphragm cooling device

Abstract

The utility model provides a diaphragm cooling device relates to battery diaphragm technical field, this diaphragm cooling device includes liquid storage groove, chilling roller and pour membrane mechanism. Liquid storage groove is used for storing coolant, and at least part chilling roller sets up in liquid storage groove, and chilling roller is used for abutting one side of diaphragm, and the input of pour membrane mechanism is connected with liquid storage groove, and the output of pour membrane mechanism is opposite to chilling roller and sets up, and the output of pour membrane mechanism is used for outputting coolant to one side of diaphragm away from chilling roller. The utility model realizes the purpose of cooling the membrane surface of both sides of diaphragm, keeps the balance of the temperature of the opposite two sides of diaphragm, reduces the situation that the membrane surface crystallization is bad or produces the line because of the uneven cooling of diaphragm, improves the cooling effect to diaphragm, ensures the stability of diaphragm product, and further improves the product quality of diaphragm.

Description

Technical Field

[0001] This utility model relates to the field of battery separator technology, and more specifically, to a separator cooling device. Background Technology

[0002] Wet-process battery separators are prepared by melt extrusion, casting, and cooling of a homogeneous solution. They exhibit balanced mechanical strength in both the transverse and longitudinal directions, good electrolyte wettability, and resistance to heat shrinkage, making them suitable for new energy batteries. The wet-process battery separator manufacturing process requires cooling of the membrane surface. A common cooling method involves direct contact of the membrane surface with a cooling roller, which can easily lead to uneven cooling, resulting in poor crystallization or streaks on the membrane surface, thus affecting the product quality. Utility Model Content

[0003] The purpose of this invention is to provide a diaphragm cooling device for continuously spraying coolant from a storage tank onto the diaphragm, maintaining the temperature balance of the two opposite sides of the diaphragm, improving the cooling effect on the diaphragm, and enhancing the stability of the diaphragm product.

[0004] A first aspect of this utility model provides a diaphragm cooling device, which includes: A reservoir for storing coolant; A quenching roller, at least a portion of which is disposed within the liquid storage tank, is used to abut against one side of the diaphragm and allows the diaphragm to be immersed in the liquid storage tank as the quenching roller moves. A casting mechanism is provided, wherein the input end of the casting mechanism is connected to the liquid storage tank, and the output end of the casting mechanism is disposed opposite to the quenching roller. The output end of the casting mechanism is used to output the coolant to the side of the diaphragm away from the quenching roller.

[0005] In one possible embodiment of the present invention, the casting mechanism includes a casting assembly disposed at the top of the liquid storage tank. The casting assembly is provided with a liquid inlet, a casting tank, and a liquid outlet. The liquid inlet is the input end of the casting mechanism, and the liquid outlet is the output end of the casting mechanism.

[0006] In one possible embodiment of this utility model, the casting tank is provided with a plurality of liquid outlet holes, which are arranged sequentially at intervals along a direction perpendicular to the movement of the diaphragm, and the liquid outlet corresponds to the plurality of liquid outlet holes.

[0007] In one possible embodiment of this utility model, the liquid outlet is an elongated structure, and the width of the liquid outlet is not less than the width of the diaphragm.

[0008] In one possible embodiment of the present invention, the casting mechanism further includes a first adjustment component, which is disposed at the top of the liquid storage tank. The first adjustment component is slidably connected to the casting component and can drive the casting component to move relative to the first adjustment component along the direction of gravity.

[0009] In one possible embodiment of the present invention, the casting mechanism further includes a second adjustment component, which is detachably connected to the end of the first adjustment component away from the casting component, and the second adjustment component is capable of moving the first adjustment component closer to or further away from the quenching roller along the diaphragm movement direction.

[0010] In one possible embodiment of the present invention, the diaphragm cooling device further includes a cooling mechanism, the output end of which is connected to the liquid inlet pipe of the casting assembly, and the input end of which is connected to the liquid storage tank pipe.

[0011] In one possible embodiment of the present invention, the diaphragm cooling device further includes at least one filtration mechanism, the filtration mechanism including a drive component and a filter component, the drive component being connected to the filter component, the filter component being connected to the cooling mechanism via a pipeline, and the filter mechanism being disposed between the casting component and the liquid storage tank.

[0012] In one possible embodiment of this utility model, the number of the filter mechanisms is two, and the two filter mechanisms are respectively connected to the input and output pipes of the cooling mechanism.

[0013] In one possible embodiment of the present invention, the diaphragm cooling device further includes a die head, the output end of which is disposed between the output end of the quenching roller and the casting mechanism.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The diaphragm cooling device provided by this utility model includes a storage tank for storing coolant, a cooling roller that abuts against one side of the diaphragm and cools the diaphragm surface, and an output end of a casting mechanism for continuously spraying the coolant from the storage tank onto the side of the diaphragm away from the cooling roller. After the coolant has cooled the diaphragm surface, it falls back into the storage tank, facilitating the recycling of the coolant in the storage tank. The cooling roller and the casting mechanism work together to cool both sides of the diaphragm, maintaining the temperature balance of the two sides of the diaphragm, reducing the possibility of poor crystallization or texture on the diaphragm surface due to uneven cooling, improving the cooling effect of the diaphragm, improving the stability of the diaphragm product, and thus improving the product quality of the diaphragm. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the diaphragm cooling device provided in some embodiments of the present invention. Figure 1 ; Figure 2 This is a side view of the diaphragm cooling device provided in some embodiments of the present invention; Figure 3 This is a three-dimensional structural diagram of the diaphragm cooling device provided in some embodiments of the present invention. Figure 2 ; Figure 4 This is a three-dimensional structural schematic diagram of the casting mechanism of the diaphragm cooling device provided in some embodiments of the present invention; Figure 5 This is a three-dimensional structural diagram of the cooling mechanism of the diaphragm cooling device provided in some embodiments of the present invention.

[0017] Explanation of key component symbols; 100-Diaphragm cooling device; 110-Liquid storage tank; 111-Opening; 120-Quick cooling roller; 130-Film casting mechanism; 131-Film casting assembly; 1311-Film casting tank; 1312-Liquid outlet; 1313-Liquid outlet hole; 1314-Liquid inlet; 132-First adjustment assembly; 133-Second adjustment assembly; 140-Cooling mechanism; 141-Cooling box; 142-Cooling coil; 150-Filtering mechanism; 151-Drive assembly; 152-Filtering assembly; 160-Die head; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] In related technologies, wet-process battery separators are prepared by melt extrusion, casting, and cooling of a homogeneous solution. They exhibit balanced mechanical strength in both the transverse and longitudinal directions, good electrolyte wettability, and resistance to heat shrinkage, making them suitable for new energy batteries. The wet-process battery separator manufacturing process requires cooling of the membrane surface. Common cooling methods involve direct contact between cooling components and the membrane surface, which can lead to uneven cooling, resulting in poor crystallization or texture on the membrane surface, thus affecting the product quality of the separator.

[0026] To solve the above problems, refer to Figure 1 As shown, an embodiment of this application provides a diaphragm cooling device 100, which includes a liquid storage tank 110, a quenching roller 120, and a film casting mechanism 130.

[0027] Specifically, in combination Figure 2 and Figure 3 As shown, the liquid storage tank 110 is used to store coolant. The liquid storage tank 110 is provided with an opening 111. At least part of the quenching roller 120 is disposed in the liquid storage tank 110, and part of the quenching roller 120 is immersed in the coolant in the liquid storage tank 110, while the quenching roller 120 is exposed at the opening 111. The quenching roller 120 is used to abut one side of the diaphragm. The quenching roller 120 can abut one side of the diaphragm surface, and the diaphragm is attached to the quenching roller 120 to facilitate cooling one side of the diaphragm. In addition, the diaphragm can be immersed in the liquid storage tank 110 as the quenching roller 120 moves, that is, the diaphragm is attached to the quenching roller 120. When the quenching roller 120 rotates relative to the quenching roller, the diaphragm is immersed in the coolant in the liquid storage tank 110 as the quenching roller 120 rotates, further achieving cooling of the diaphragm.

[0028] For example, the liquid storage tank 110 is a liquid storage box, and the liquid storage box is provided with the liquid storage tank 110. The quenching roller 120 is provided at the opening 111 of the liquid storage tank 110. The quenching roller 120 can be a cooling roller or a cooling roller group. During the relative rotation, the quenching roller 120 drives the diaphragm to perform transmission. The quenching roller 120 can cool and reduce the surface of the diaphragm.

[0029] It is understandable that during the relative rotation of the quench roller 120, the side of the diaphragm away from the quench roller 120 has an idle period before entering the solution in the storage tank 110. During the idle period, the diaphragm is in direct contact with the air, which may result in local overheating or uneven cooling on the side of the diaphragm away from the quench roller 120. This may lead to uneven shrinkage of the diaphragm surface upon cooling, resulting in poor crystallization or the formation of textures on the membrane surface. In this application, the above problems can be solved by pouring coolant onto the side of the diaphragm away from the quench roller 120 to reduce the time that air contacts the side of the diaphragm away from the quench roller 120.

[0030] In this embodiment, as Figure 1 As shown, the input end of the casting mechanism 130 is connected to the liquid storage tank 110, and the output end of the casting mechanism 130 is opposite to the cooling roller 120. The liquid storage tank 110 collects the coolant after casting and continuously outputs the coolant to the input end of the casting mechanism 130. The output end of the casting mechanism 130 is used to output the coolant to the side of the diaphragm away from the cooling roller 120. The output end of the casting mechanism 130 is used to continuously spray the coolant in the liquid storage tank 110 onto the side of the diaphragm away from the cooling roller 120. After the coolant is cast and cooled on the membrane surface, it falls into the liquid storage tank to facilitate the recycling of the coolant in the liquid storage tank. The cooling roller and the casting mechanism work together to achieve the purpose of cooling the membrane surfaces on both sides of the diaphragm, maintaining the temperature uniformity of the opposite sides of the diaphragm, reducing the possibility of poor membrane surface crystallization or texture caused by uneven cooling, improving the cooling effect of the diaphragm, and ensuring the stability of the diaphragm product.

[0031] It is easy to understand that the coolant can be white oil. White oil has better compatibility with the separator and will not cause corrosion or performance degradation to the separator. On the one hand, white oil can be used as a pore-forming agent in the production of wet lithium battery separators, forming the microporous structure of the separator through the thermal phase separation process. After being washed away by the solvent, white oil leaves uniformly distributed pores in the separator, which directly affects the porosity, air permeability and liquid absorption capacity of the separator. On the other hand, white oil can be used to pour water onto the side of the separator away from the quench roller 120 to achieve the purpose of cooling the separator.

[0032] refer to Figure 1 and Figure 2 As shown, the diaphragm cooling device 100 has a first direction X, a second direction Y, and a third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other. For example, the first direction X is perpendicular to the mechanical stretching direction during the diaphragm production process, i.e., perpendicular to the diaphragm movement direction; the second direction Y, taking the height direction of the diaphragm cooling device 100 as an example, is the direction of gravity; and the third direction Z is the mechanical stretching direction during the diaphragm production process, i.e., along the diaphragm movement direction. It is understood that the above definitions are only for ease of understanding the relative positional relationships of the parts in the diaphragm cooling device 100 and should not be construed as limiting this application.

[0033] In one embodiment, alternatively, such as Figure 3 As shown, the casting mechanism 130 includes a casting assembly 131, which is disposed at the top of the liquid storage tank 110. The casting assembly 131 is provided with a liquid inlet 1314, a casting tank 1311, and a liquid outlet 1312. The liquid inlet 1314 is the input end of the casting mechanism 130, and the liquid outlet 1312 is the output end of the casting mechanism 130.

[0034] In one embodiment, alternatively, such as Figure 1 and Figure 3 As shown, the diaphragm cooling device 100 also includes a die head 160, the chilling roller 120 is a cooling roller, the output end of the die head 160 is set close to the output end of the casting mechanism 130, the output end of the die head 160 is used to output the diaphragm, so that the output diaphragm is set close to the output end of the casting mechanism 130, the output end of the casting mechanism 130 has a short casting distance, ensuring that the diaphragm at the output end of the die head 160 is directly cooled and cooled, ensuring the consistency and uniformity of the temperature on both sides of the diaphragm.

[0035] In summary, the liquid storage tank 110 of the diaphragm cooling device 100 is used to store coolant, the quenching roller 120 can abut against one side of the diaphragm and cool the diaphragm surface, and the output end of the casting mechanism 130 is used to continuously spray the coolant in the liquid storage tank 110 onto the side of the diaphragm away from the quenching roller 120. After the coolant is poured and cooled on the diaphragm surface, it will fall into the liquid storage tank to facilitate the recycling of the coolant in the liquid storage tank. The quenching roller and the casting mechanism work together to achieve the purpose of cooling both sides of the diaphragm surface, maintaining the temperature uniformity of the two sides of the diaphragm, reducing the situation of poor crystalline formation or texture on the diaphragm surface due to uneven cooling, improving the cooling effect of the diaphragm, improving the stability of the diaphragm product, and thus improving the product quality of the diaphragm.

[0036] refer to Figure 1 As shown, an embodiment of this application provides another diaphragm cooling device 100, which includes a liquid storage tank 110, a quenching roller 120, and a film casting mechanism 130.

[0037] Specifically, in combination Figure 2 and Figure 3 As shown, the storage tank 110 is used to store coolant. The storage tank 110 is provided with an opening 111. At least a portion of the quench roller 120 is disposed in the storage tank 110, with a portion of the quench roller 120 immersed in the coolant in the storage tank 110 and the quench roller 120 exposed at the opening 111. The quench roller 120 is used to abut against one side of the diaphragm. The quench roller 120 can abut against one side of the diaphragm surface, and the diaphragm is attached to the quench roller 120 to facilitate cooling one side of the diaphragm. In addition, the diaphragm can be immersed into the storage tank 110 as the quench roller 120 moves, that is, the diaphragm is attached to the quench roller 120. When the quench roller 120 rotates relative to the quench roller, the diaphragm is immersed in the coolant in the storage tank 110 as the quench roller 120 rotates, further achieving cooling of the diaphragm. Figure 1As shown, the input end of the casting mechanism 130 is connected to the liquid storage tank 110, and the output end of the casting mechanism 130 is opposite to the cooling roller 120. The output end of the casting mechanism 130 is used to output the coolant to the side of the diaphragm away from the cooling roller 120. The output end of the casting mechanism 130 is used to continuously pour the coolant in the liquid storage tank 110 onto the side of the diaphragm away from the cooling roller 120. After the coolant is poured and cooled on the membrane surface, it falls into the liquid storage tank to facilitate the recycling of the coolant in the liquid storage tank. The cooling roller and the casting mechanism work together to achieve the purpose of cooling the membrane surfaces on both sides of the diaphragm, maintaining the temperature uniformity of the opposite sides of the diaphragm, reducing the possibility of poor membrane surface crystallization or texture caused by uneven cooling, and improving the cooling effect on the diaphragm.

[0038] In one embodiment, alternatively, such as Figure 3 As shown, the casting mechanism 130 includes a casting assembly 131, which is located above the liquid storage tank 110. The casting assembly 131 is provided with an inlet 1314, a casting tank 1311, and an outlet 1312. The outlet 1312 is the output end of the casting mechanism 130. The casting tank 1311 is provided with multiple outlet holes 1313, which are arranged at intervals along a path perpendicular to the diaphragm movement. The outlet 1312 corresponds to the multiple outlet holes 1313, and the coolant passes through them. The coolant enters the casting tank 1311 through the inlet 1314. The casting tank 1311 is used to hold the coolant. The coolant overflows from the outlet 1313 of the casting tank 1311 to the outlet 1312. Under its own weight, the coolant falls through the outlet 1312, thereby casting and cooling the diaphragm above the storage tank 110. This ensures that the coolant is in full contact with the diaphragm surface to cool and reduce the temperature of the diaphragm, thus ensuring the conductive cooling effect of the diaphragm and reducing the occurrence of local overheating of the diaphragm.

[0039] It is understandable that the coolant flow can be made more uniform by overflowing from the outlet hole 1313 of the casting tank 1311 to the outlet 1312.

[0040] Further, refer to Figure 3 As shown, the outlet 1312 has an elongated shape, and the width of the outlet 1312 is not less than the width of the diaphragm. The outlet hole 1313 and the outlet 1312 form a height difference, which can increase the outlet width of the coolant. Furthermore, the outlet width of the elongated outlet 1312 is greater than or equal to the width of the diaphragm, so that the coolant output from the outlet 1312 can cover the entire width of the diaphragm, allowing the coolant to completely cover the surface of the diaphragm and improve cooling efficiency.

[0041] For example, the outlet 1312 is provided with an arc-shaped protrusion, so that the coolant forms a uniform liquid surface through the arc-shaped protrusion of the outlet 1312. The elongated structure of the outlet 1312 allows the coolant to have sufficient liquid width when falling, so that the coolant can form a waterfall-like falling structure after accumulation, continuously pouring and cooling the diaphragm.

[0042] Optionally, combined Figure 3 and Figure 4 As shown, the casting mechanism 130 also includes a first adjustment component 132. The first adjustment bracket assembly is disposed at the top of the liquid storage tank 110, so that the casting component 131 is disposed corresponding to the liquid storage tank 110. The first adjustment component 132 is slidably connected to the casting component 131, and the casting component 131 can move relative to the first adjustment component 132 along the direction of gravity, that is, the casting component 131 can move along the second direction Y, that is, the casting component 131 can move along the height direction of the diaphragm cooling device 100, so as to adjust the height of the casting component 131, so that the casting component 131 is at a suitable height, and the splashing of coolant output from the outlet 1312 when casting the diaphragm membrane surface is reduced due to the high height of the casting component 131. Of course, the relative movement of the casting component 131 on the slide rail of the first adjustment component 132 can be manually adjusted, or the relative movement of the casting component 131 on the slide rail of the first adjustment component 132 can be driven by a drive cylinder, which will not be described in detail here.

[0043] Further, refer to Figure 4As shown, the casting mechanism 130 also includes a second adjusting component 133. The second adjusting component 133 is detachably connected to the end of the first adjusting component 132 away from the casting component 131. The second adjusting component 133 enables the first adjusting component 132 to move closer to or further away from the quench roller 120 along the diaphragm movement direction, that is, the second adjusting component 133 can move closer to or further away from the quench roller 120 along the third direction Z. The second adjusting component 133 is provided with multiple adjusting parts along the third direction Z. The second adjusting component 133 can be connected to the first adjusting component 132 through any of the adjusting parts to achieve a fixed connection between the first adjusting component 132 and the second adjusting component 133. For example, the second adjusting component 133 is used to be installed on the liquid storage tank 110. The position of the first adjusting component 132 can be adjusted on the second adjusting component 133 to move the first adjusting component 132 closer to or further away from the quench roller 120, thereby adjusting the relative position between the casting component 131 and the quench roller 120. The second adjusting component 133 is provided with several adjusting holes, and the first adjusting component 132 can be corresponding to any set of adjusting holes and screwed together. It can be understood that when the first adjusting component 132 is positioned on the second adjusting component 133 so that the first adjusting component 132 is closer to or farther away from the quench roller 120, it is only necessary to ensure that the coolant output from the casting component 131 can be cast onto the side of the diaphragm away from the quench roller 120 without affecting the normal operation of the quench roller 120, and no special limitations are made here.

[0044] In one embodiment, alternatively, referencing Figure 1 As shown, the diaphragm cooling device 100 also includes a cooling mechanism 140. The output end of the cooling mechanism 140 is connected to the inlet 1314 of the casting assembly 131, and the input end of the cooling mechanism 140 is connected to the storage tank 110. Accordingly, the coolant enters the inlet 1314 of the casting assembly 131 after passing through the cooling mechanism 140 from the storage tank 110. The cooling mechanism 140 cools the coolant in the circulation loop.

[0045] For example, such as Figure 5 As shown, the cooling mechanism 140 includes a cooling tank 141 and a cooling coil 142. The cooling coil 142 is disposed inside the cooling tank 141 and can increase the contact surface area with the coolant. The output end of the cooling tank 141 is connected to the liquid inlet 1314 of the casting assembly 131, and the input end of the cooling tank 141 is connected to the liquid storage tank 110. After the coolant enters the cooling tank 141 through the input end, the cooling coil 142 cools and lowers the temperature of the coolant in the cooling tank 141, thereby ensuring that the coolant entering the casting assembly 131 is within the set temperature range and improving the cooling effect of the diaphragm cooling device 100.

[0046] In one embodiment, alternatively, such as Figure 1 and Figure 3 As shown, the diaphragm cooling device 100 further includes at least one filtration mechanism 150. The filtration mechanism 150 includes a drive assembly 151 and a filter assembly 152. The drive assembly 151 is connected to the filter assembly 152, and the filter assembly 152 is connected to the cooling mechanism 140 via a pipeline. The filter mechanism 150 is disposed between the casting assembly 131 and the liquid storage tank 110. The drive assembly 151 is used to drive the coolant to circulate. The coolant flows unidirectionally in the filter assembly 152. The coolant is filtered for impurities through the filter assembly 152, reducing the possibility of the coolant entering the casting assembly 131 being blocked by impurities, avoiding wear or corrosion of valve components, and ensuring continuous circulation of the coolant.

[0047] Optionally, refer to Figure 1 As shown, there are two filter mechanisms 150. The two filter mechanisms 150 are respectively connected to the input and output pipes of the cooling mechanism 140, so that the coolant entering the cooling mechanism 140 and the coolant exiting the cooling mechanism 140 are filtered by the filter mechanism 150, thereby improving the cleanliness of the coolant and the circulation stability of the coolant in the circulation loop, and supporting the long-term stable operation of the diaphragm cooling device 100.

[0048] In one embodiment, alternatively, such as Figure 1 and Figure 3 As shown, the diaphragm cooling device 100 also includes a die head 160. The output end of the die head 160 is disposed between the cooling roller 120 and the output end of the casting mechanism 130. The output end of the die head 160 is used to output the diaphragm, so that the output end of the casting mechanism 130 has a shorter casting distance, ensuring that the diaphragm at the output end of the die head 160 is directly cooled, thus ensuring the consistency and uniformity of the temperature on both sides of the diaphragm. For example, the output end of the die head 160 is disposed close to the output end of the casting mechanism 130 to directly cool the diaphragm output from the output end of the die head 160, ensuring the smoothness of the diaphragm.

[0049] Furthermore, part of the cooling roller is located within the receiving groove of the liquid storage tank 110, so that the diaphragm surrounds the cooling roller and extends into the liquid storage tank 110. The diaphragm is attached to the cooling roller, and the cooling roller supports and cools the diaphragm. After the diaphragm is poured, the diaphragm is driven into the liquid storage tank 110 during the relative rotation of the cooling roller to cool and lower the temperature of the diaphragm again. This avoids the situation where the local temperature of the diaphragm is too high during the relative rotation of the diaphragm on the cooling roller, which may cause defects on the surface of the diaphragm.

[0050] In addition, the diaphragm cooling device 100 also includes a temperature control mechanism and a flow control mechanism. The temperature control mechanism is connected to the quench roller 120 and the casting assembly respectively, and is used to regulate the roller surface temperature of the quench roller 120 and the temperature of the coolant output by the casting assembly. The temperature of the coolant output by the casting assembly can be regulated and controlled by the cooling mechanism 140. The diaphragm cooling device 100 can also control the roller surface temperature of the quench roller 120. The flow control mechanism is used to regulate the flow rate of the coolant output from the outlet 1312 of the casting assembly.

[0051] An embodiment of this utility model also provides a cooling method. After the diaphragm is output, one side of the diaphragm is attached to the cooling roller 120. The cooling roller 120 drives the diaphragm to rotate relative to it, and the coolant is poured from the side of the diaphragm away from the cooling roller 120, thereby achieving synchronous cooling of the outer surface of the diaphragm. The temperature control mechanism is used to regulate the outlet temperature of the casting mechanism 130. The outlet temperature of the casting mechanism 130 is Q, which satisfies: 15℃≤Q≤30℃. The flow control mechanism is used to regulate the outlet flow rate of the casting mechanism 130. The outlet flow rate of the casting mechanism 130 is P, which satisfies: 15L / min≤P≤30L / min. The outlet of the casting mechanism 130 is the outlet 1312.

[0052] Furthermore, the liquid outlet temperature at the output end of the casting mechanism 130 is Q, which satisfies: 15℃≤Q≤20℃, and the liquid outlet flow rate at the output end of the casting mechanism 130 is P, which satisfies: 20L / min≤P≤25L / min.

[0053] In the cooling method of this application, the test methods all adopt the standard of 8.5 m / min cooling roller speed, 588 kg / h melt extrusion rate of diaphragm, and 215°C membrane surface temperature when the diaphragm is extruded from the die head 160 to ensure that the comparison parameters are consistent.

[0054] In this embodiment, an infrared thermometer or thermocouple is used to measure the temperature of the liquid outlet 1312 of the diaphragm cooling device 100, the membrane surface temperature of the diaphragm, and the temperature of the diaphragm after passing through the storage tank 110. The measurement points need to cover more than three evenly distributed positions in the width direction of the membrane surface (consistent with the width of the liquid outlet 1312), and the average value is taken. The temperature of the diaphragm after passing through the storage tank 110 is measured at a fixed distance (e.g., 5 cm) after the outlet of the storage tank 110 to avoid environmental interference. The temperature of the diaphragm after passing through the storage tank 110 is measured at a fixed time of 5 minutes. Each experiment needs to be repeated 3 times, and the error range should be within ±3℃.

[0055] It is understandable that increasing or decreasing the speed of the cooling roller may affect the contact time between the membrane surface and the coolant. The melt extrusion amount of the diaphragm ensures that the thickness of the output diaphragm remains consistent. By maintaining the same cooling roller speed and the same melt extrusion amount of the diaphragm, the diaphragm cooling device 100 can also control the roller surface temperature of the quench roller 120, so that the roller surface temperature of the quench roller 120 remains consistent during the test, thus ensuring the accuracy of the test results.

[0056] The test results are shown in the table below: Table 1

[0057] Among them, the membrane products in Experiment 1 and Experiment 2 had a few cracks on the surface, the thickness was relatively uniform, and no warping occurred, but black spot defects appeared on the membrane surface. The membrane products in Experiment 3 and Experiment 4 were relatively smooth, the thickness was relatively uniform, and no warping occurred. In Experiment 5, due to the large flow rate, the membrane surface showed uneven thickness. In Experiment 6, due to the increased flow rate and low temperature, the membrane surface thickness was relatively uneven, and the membrane product warped.

[0058] In addition, the liquid flow rate of outlet 1312 in Table 1 is the flow rate of coolant output from the output end of the casting mechanism 130, and the liquid temperature of outlet 1312 is the temperature of the coolant poured into the diaphragm at outlet 1312; the initial cooling diaphragm temperature is the temperature of the diaphragm after being poured with coolant before entering the storage tank 110; and the secondary cooling diaphragm temperature is the temperature of the diaphragm after being cooled by the storage tank 110.

[0059] As shown in the table above, comparing the diaphragm temperatures in Experiments 1 to 6, when the liquid flow rate P of outlet 1312 is 20 L / min ≤ P ≤ 25 L / min and the liquid temperature Q of outlet 1312 is 15℃ ≤ Q ≤ 20℃, the cooling method of this application cools the diaphragm. The initial cooling diaphragm temperature is 60-65℃, and the secondary cooling diaphragm temperature is 40-45℃, which has a good cooling effect on the diaphragm. However, in Experiment 3, the liquid flow rate P of outlet 1312 is 20 L / min, and the liquid temperature Q of outlet 1312 is 20℃. Compared with Experiment 4, the liquid flow rate of outlet 1312 is lower, saving energy. Compared with Experiment 4, the liquid temperature Q of outlet 1312 in Experiment 3 is higher, avoiding the diaphragm warping caused by a lower liquid temperature Q of outlet 1312. It is understood that the above scheme can also be applied to different diaphragm melt extrusion rates and diaphragm surface temperatures when extruded from the die 160. In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0060] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A diaphragm cooling device, characterized in that, include: A reservoir for storing coolant; A quenching roller, at least a portion of which is disposed within the liquid storage tank, is used to abut against one side of the diaphragm and allows the diaphragm to be immersed in the liquid storage tank as the quenching roller moves. A casting mechanism is provided, wherein the input end of the casting mechanism is connected to the liquid storage tank, and the output end of the casting mechanism is disposed opposite to the quenching roller. The output end of the casting mechanism is used to output the coolant to the side of the diaphragm away from the quenching roller.

2. The diaphragm cooling device according to claim 1, characterized in that, The casting mechanism includes a casting assembly, which is disposed at the top of the liquid storage tank. The casting assembly is provided with a liquid inlet, a casting tank, and a liquid outlet. The liquid inlet is the input end of the casting mechanism, and the liquid outlet is the output end of the casting mechanism.

3. The diaphragm cooling device according to claim 2, characterized in that, The casting tank is provided with multiple liquid outlet holes, which are arranged sequentially at intervals along a direction perpendicular to the movement of the diaphragm, and the liquid outlet corresponds to the multiple liquid outlet holes.

4. The diaphragm cooling device according to claim 2, characterized in that, The liquid outlet has an elongated shape, and the width of the liquid outlet is not less than the width of the diaphragm.

5. The diaphragm cooling device according to claim 2, characterized in that, The casting mechanism further includes a first adjustment component, which is disposed at the top of the liquid storage tank. The first adjustment component is slidably connected to the casting component and can drive the casting component to move relative to the first adjustment component along the direction of gravity.

6. The diaphragm cooling device according to claim 5, characterized in that, The coating mechanism further includes a second adjustment component, which is detachably connected to the end of the first adjustment component away from the coating component, and the second adjustment component can move the first adjustment component closer to or further away from the quenching roller along the direction of diaphragm movement.

7. The diaphragm cooling device according to claim 2, characterized in that, It also includes a cooling mechanism, the output end of which is connected to the liquid inlet pipe of the casting assembly, and the input end of which is connected to the liquid storage tank pipe.

8. The diaphragm cooling device according to claim 7, characterized in that, It also includes at least one filtration mechanism, which includes a drive assembly and a filter assembly. The drive assembly is connected to the filter assembly, and the filter assembly is connected to the cooling mechanism pipeline. The filter mechanism is disposed between the casting assembly and the liquid storage tank.

9. The diaphragm cooling device according to claim 8, characterized in that, The number of filter mechanisms is two, and the two filter mechanisms are respectively connected to the input and output pipes of the cooling mechanism.

10. The diaphragm cooling device according to any one of claims 1 to 9, characterized in that, It also includes a die head, the output end of which is located between the output end of the cooling roller and the casting mechanism.

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