Battery separator cooling system

Abstract

The utility model relates to battery diaphragm cooling system, its characterized in that, contain: first cooling device, contain: first fluid supply source, first hollow pipe contain: first input, first output and first flow space, wherein the first flow space contain: first taper space, first divergent space and first necking portion, and first refrigeration unit, and second cooling device is correspondingly set with first cooling device, wherein contain: second fluid supply source, second hollow pipe contain: second input, second output and second flow space, wherein the second flow space contain: second taper space, second divergent space and second necking portion, and second refrigeration unit.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery separator processing technology, specifically, to a battery separator cooling system. Background Technology

[0002] The production process of wet-process lithium-ion battery separators includes steps such as feeding and batching, extrusion plasticizing, casting cooling, longitudinal stretching, transverse stretching, extraction and drying, traction and shaping, and winding and inspection. In the biaxial stretching stage, the molecular chains of the separator are oriented both longitudinally and transversely, allowing the white oil, acting as a pore-forming agent, to be evenly distributed between the oriented molecular chains. After dichloromethane extraction, the white oil is removed, resulting in a microporous structure in the separator, providing excellent ion conductivity and mechanical strength. However, in the current process, in the transition zone between biaxial stretching and extraction, the separator mainly relies on ambient air for natural cooling. Due to the compact equipment layout, short membrane travel distance, and high operating speed in this zone, the membrane surface cooling time is limited, resulting in extremely low cooling efficiency and a high membrane surface temperature. When the separator is introduced into the extraction process, the insufficiently cooled membrane surface is prone to stress concentration or localized softening due to heat and solvent contact, leading to membrane tearing or breakage, thus reducing product yield and production stability. In view of the problems mentioned above, a system with high cooling efficiency that can quickly reduce the temperature of the battery separator is urgently needed. Utility Model Content

[0003] The purpose of this invention is to provide a system with high cooling efficiency that can quickly reduce the temperature of the battery separator.

[0004] To achieve the above objectives, this utility model provides a battery separator cooling system, characterized in that it comprises: a first cooling device for cooling one side of a battery separator, wherein the first cooling device comprises: a first fluid supply source; a first hollow tube comprising: a first inlet formed at one end of the first hollow tube and connected to the first fluid supply source; a first outlet formed at the other end of the first hollow tube; and a first flow guiding space formed inside the first hollow tube and connected to the first inlet and the first outlet respectively, wherein the first flow guiding space comprises: a first narrowing space, one end of which is connected to the first inlet; a first expanding space, one end of which is connected to the first outlet and the other end of which is connected to the first narrowing space; and a first constriction portion formed at the intersection of the first narrowing space and the first expanding space, wherein the smallest opening in the first flow guiding space is located at the first constriction portion; and a first refrigeration unit disposed in the first flow guiding space and located at a position corresponding to the first constriction portion; and a second cooling device connected to the first refrigeration unit. A corresponding cooling device is provided to cool the other side of the battery separator. A cooling space is defined between the first cooling device and the second cooling device, and the battery separator is located within the cooling space. The second cooling device includes: a second fluid supply source; a second hollow tube comprising: a second inlet formed at one end of the second hollow tube and connected to the second fluid supply source; a second outlet formed at the other end of the second hollow tube; and a second flow guiding space formed inside the second hollow tube and connected to the second inlet and the second outlet, respectively. The second flow guiding space includes: a second converging space, one end of which is connected to the second inlet; a second expanding space, one end of which is connected to the second outlet and the other end of which is connected to the second converging space; and a second narrowing portion formed at the intersection of the second converging space and the second expanding space, wherein the smallest opening in the second flow guiding space is located at the second narrowing portion; and a second cooling unit disposed in the second flow guiding space and located at a position corresponding to the second narrowing portion.

[0005] More preferably, wherein: the first fluid supply source is connected to the first input port and supplies the first fluid to the first input port, so that the first fluid can sequentially flow to the first constricting space, the first narrowing portion, and the first expanding space, and then be output from the first output port to contact one side of the battery separator; and the second fluid supply source is connected to the second input port and supplies the second fluid to the second input port, so that the second fluid can sequentially flow to the second constricting space, the second narrowing portion, and the second expanding space, and then be output from the second output port to contact the other side of the battery separator.

[0006] Preferably, the first fluid is a gas and the second fluid is a gas.

[0007] More preferably, it further includes actuators connected to the first cooling device and the second cooling device respectively, to adjust the distance between the first cooling device and the battery separator, the distance between the second cooling device and the battery separator, or the height of the cooling space.

[0008] Preferably, the connection between the actuator and the first cooling device is a threaded fastening, pivoting, or snap-fit; and the connection between the actuator and the second cooling device is a threaded fastening, pivoting, or snap-fit.

[0009] More preferably, it further includes: a first temperature sensor disposed on the first cooling device to sense the membrane surface temperature on the side of the battery separator near the first cooling device; and a second temperature sensor disposed on the second cooling device to sense the membrane surface temperature on the side of the battery separator near the second cooling device.

[0010] More preferably, the cross-sectional shape of the first flow guiding space is circular or elliptical; and the cross-sectional shape of the second flow guiding space is circular or elliptical.

[0011] Preferably, the axis of the first hollow tube is parallel to the axis of the second hollow tube.

[0012] More preferably, the angle formed between the axis of the first hollow tube and one side of the battery separator is 30° to 60°; and the angle formed between the axis of the second hollow tube and the other side of the battery separator is 30° to 60°.

[0013] Preferably, the opening size of the end of the first guide space that contacts the first input port is larger than the opening size of the end of the first guide space that contacts the first output port, and the opening size of the end of the second guide space that contacts the second input port is larger than the opening size of the end of the second guide space that contacts the second output port; the opening size of the end of the first guide space that contacts the first input port is larger than the opening size of the end of the first guide space that contacts the first output port, and the opening size of the end of the second guide space that contacts the second input port is smaller than the opening size of the end of the second guide space that contacts the second output port. Furthermore, the size of the opening at the end of the second flow guiding space that contacts the second input port is greater than the size of the opening at the end of the second flow guiding space that contacts the second output port; the size of the opening at the end of the first flow guiding space that contacts the first input port is smaller than the size of the opening at the end of the first flow guiding space that contacts the first output port, and the size of the opening at the end of the second flow guiding space that contacts the second input port is smaller than the size of the opening at the end of the second flow guiding space that contacts the second output port; or the size of the opening at the end of the first flow guiding space that contacts the first input port is equal to the size of the opening at the end of the first flow guiding space that contacts the first output port, and the size of the opening at the end of the second flow guiding space that contacts the second input port is equal to the size of the opening at the end of the second flow guiding space that contacts the second output port.

[0014] The advantage of this invention over prior art lies in the fact that, in the first cooling device, the width of the opening in the first flow guide space varies, allowing the first fluid supplied by the first fluid source to be compressed at the first constriction after being delivered into the first flow guide space, thus significantly increasing the flow rate. Because the flow rate of the first fluid to the first constriction per unit time increases, the first fluid can frequently collide with the first cooling unit and rapidly exchange heat, causing the temperature of the first fluid to drop quickly. Furthermore, when the first fluid comes into contact with the battery separator, the temperature difference between the first fluid and the battery separator increases, further lowering the surface temperature of the battery separator, thereby achieving unilateral cooling. Similarly, the second cooling device operates on the same principle as the first cooling device, utilizing the Venturi effect to uniformly and rapidly cool both sides of the battery separator, ensuring the stability of the battery separator's structure during subsequent processing. Attached Figure Description

[0015] Figure 1 This is a planar structural diagram used to illustrate the structural features of the battery separator cooling system. Detailed Implementation

[0016] To make the above and / or other objectives, effects, and features of this utility model more apparent and understandable, preferred embodiments are described in detail below:

[0017] The purpose of this utility model is to provide a battery separator cooling system 1, wherein, as shown in the figure... Figure 1 As shown, the device includes: a first cooling device 2 for cooling one side of the battery separator 3, wherein the first cooling device 2 includes: a first fluid supply source 4; a first hollow tube 5, including: a first inlet 6 formed at one end of the first hollow tube 5 and connected to the first fluid supply source 4; a first outlet 7 formed at the other end of the first hollow tube 5; and a first flow guiding space 8 formed inside the first hollow tube 5 and connected to the first inlet 6 and the first outlet 7 respectively, wherein the first flow guiding space 8 includes: a first tapering space 9, one end of which is connected to the first inlet 6. The first flow guiding space 8 is connected to the first expansion space 10, one end of which is connected to the first output port 7 and the other end of which is connected to the first contraction space 9; and a first narrowing portion 11 is formed at the intersection of the first contraction space 9 and the first expansion space 10, wherein the smallest opening in the first flow guiding space 8 is located at the first narrowing portion 11; and a first cooling unit 12 is disposed in the first flow guiding space 8 and located at a position corresponding to the first narrowing portion 11; and a second cooling device 13 is disposed corresponding to the first cooling device 2 to cool the other side of the battery separator 3. A cooling space 14 is defined between the first cooling device 2 and the second cooling device 13, and the battery separator 3 is located in the cooling space 14. The second cooling device 13 includes: a second fluid supply source 15; and a second hollow tube 16, including: a second inlet 17 formed at one end of the second hollow tube 16 and connected to the second fluid supply source 15; a second outlet 18 formed at the other end of the second hollow tube 16; and a second flow guiding space 19 formed inside the second hollow tube 16 and connected to the second inlet 17 and the second outlet 18, respectively. The second flow guiding space 19 includes: a second narrowing space 20, one end of which is connected to the second input port 17; a second expanding space 21, one end of which is connected to the second output port 18 and the other end of which is connected to the second narrowing space 20; and a second constriction portion 22, which is formed at the intersection of the second narrowing space 20 and the second expanding space 21, wherein the smallest opening in the second flow guiding space 19 is located at the second constriction portion 22; and a second cooling unit 23, which is disposed in the second flow guiding space 19 and located at a position corresponding to the second constriction portion 22.

[0018] More preferably, in order to supply the first fluid and the second fluid, and to further cool the first fluid and the second fluid before they come into contact with the surface of the battery separator 3 to accelerate the cooling efficiency of the battery separator 3, wherein: the first fluid supply source 4 is connected to the first inlet 6 and supplies the first fluid to the first inlet 6, so that the first fluid can sequentially flow to the first constricting space 9, the first narrowing portion 11, and the first widening space 10, and then be output from the first outlet 7 to contact one side of the battery separator 3; and the second fluid supply source 15 is connected to the second inlet 17 and supplies the second fluid to the second inlet 17, so that the second fluid can sequentially flow to the second constricting space 20, the second narrowing portion 22, and the second widening space 21, and then be output from the second outlet 18 to contact the other side of the battery separator 3. In a preferred embodiment, the first fluid is a gas and the second fluid is a gas, but this is not a limitation. In another preferred embodiment, to adjust the distance between the first output port 7 and the battery separator 3 or the distance between the second output port 18 and the battery separator 3, an actuator 24 is further included, which is connected to the first cooling device 2 and the second cooling device 13 respectively, to adjust the distance between the first cooling device 2 and the battery separator 3, the distance between the second cooling device 13 and the battery separator 3, or the height of the cooling space 14. In yet another preferred embodiment, the connection between the actuator 24 and the first cooling device 2 is by threaded locking, pivoting, or snap-fit, but not limited thereto; and the connection between the actuator 24 and the second cooling device 13 is by threaded locking, pivoting, or snap-fit, but not limited thereto.

[0019] More preferably, in order to sense the temperature of the battery separator 3 and confirm whether its temperature meets the standard, it further includes: a first temperature sensor 25, which is disposed on the first cooling device 2 to sense the membrane surface temperature on the side of the battery separator 3 near the first cooling device 2; and a second temperature sensor 26, which is disposed on the second cooling device 13 to sense the membrane surface temperature on the side of the battery separator 3 near the second cooling device 13.

[0020] Preferably, to improve structural stability, the cross-sectional shape of the first flow guiding space 8 is circular or elliptical, but not limited thereto; and the cross-sectional shape of the second flow guiding space 19 is circular or elliptical, but not limited thereto. In a preferred embodiment, the axis of the first hollow tube 5 is parallel to the axis of the second hollow tube 16. In another preferred embodiment, the angle formed between the axis of the first hollow tube 5 and one side of the battery separator 3 is 30° to 60°, but not limited thereto; and the angle formed between the axis of the second hollow tube 16 and the other side of the battery separator 3 is 30° to 60°, but not limited thereto.

[0021] Preferably, in order to control the flow rate, velocity, and temperature of the first fluid and the second fluid flowing to the battery separator 3, the opening size of the end of the first flow guide space 8 that contacts the first input port 6 is larger than the opening size of the end of the first flow guide space 8 that contacts the first output port 7, and the opening size of the end of the second flow guide space 19 that contacts the second input port 17 is larger than the opening size of the end of the second flow guide space 19 that contacts the second output port 18; the opening size of the end of the first flow guide space 8 that contacts the first input port 6 is larger than the opening size of the end of the first flow guide space 8 that contacts the first output port 7, and the opening size of the end of the second flow guide space 19 that contacts the second input port 17 is smaller than the opening size of the end of the second flow guide space 19 that contacts the second output port 18; the opening size of the end of the first flow guide space 8 that contacts the first input port 6 is smaller than the opening size of the end of the first flow guide space 8 that contacts the first input port 6. The size of the opening at the end of the output port 7 that is in contact with the second flow guide space 19 that is in contact with the second input port 17 is greater than the size of the opening at the end of the second flow guide space 19 that is in contact with the second output port 18; the size of the opening at the end of the first flow guide space 8 that is in contact with the first input port 6 is smaller than the size of the opening at the end of the first flow guide space 8 that is in contact with the first output port 7, and the size of the opening at the end of the second flow guide space 19 that is in contact with the second input port 17 is smaller than the size of the opening at the end of the second flow guide space 19 that is in contact with the second output port 18; or the size of the opening at the end of the first flow guide space 8 that is in contact with the first input port 6 is equal to the size of the opening at the end of the first flow guide space 8 that is in contact with the first output port 7, and the size of the opening at the end of the second flow guide space 19 that is in contact with the second input port 17 is equal to the size of the opening at the end of the second flow guide space 19 that is in contact with the second output port 18.

[0022] Compared to prior art, the advantages of this invention are as follows: In the first cooling device 2, the width of the opening in the first flow guiding space 8 varies, allowing the first fluid supplied by the first fluid source 4 to be compressed at the first constriction 11 after being delivered into the first flow guiding space 8, thus significantly increasing the flow rate. Because the flow rate of the first fluid to the first constriction 11 per unit time increases, the first fluid can frequently collide with the first cooling unit 12 and rapidly exchange heat, causing the temperature of the first fluid to drop quickly. Furthermore, when the first fluid comes into contact with the battery separator 3, the temperature difference between the first fluid and the battery separator 3 increases, further lowering the surface temperature of the battery separator 3, thereby achieving unilateral cooling. Similarly, the second cooling device 13 operates on the same principle as the first cooling device 2. Through the Venturi effect, both sides of the battery separator 3 can be cooled uniformly and rapidly, ensuring the stability of the battery separator 3 during subsequent processing.

[0023] However, the above description is only a preferred embodiment of the present utility model, but it cannot be used to limit the scope of patent protection of the present utility model; therefore, any simple equivalent changes and modifications made in accordance with the scope of patent protection and the contents of the specification of the present utility model shall still fall within the scope of patent protection of the present utility model.

Claims

1. A battery separator cooling system, characterized in that, Include: A first cooling device is used to cool one side of the battery separator, wherein the first cooling device comprises: First fluid supply source; A first hollow tube includes: a first inlet formed at one end of the first hollow tube and connected to a first fluid supply source; a first outlet formed at the other end of the first hollow tube; and a first flow guiding space formed inside the first hollow tube and connected to the first inlet and the first outlet, respectively, wherein the first flow guiding space includes: The first tapering space has one end connected to the first input port; A first expanding space, one end of which is connected to the first output port and the other end of which is connected to the first contracting space; and The first constriction is formed at the intersection of the first narrowing space and the first widening space, wherein the smallest opening in the first guide space is located at the first constriction. as well as The first refrigeration unit is disposed in the first flow guide space and is located at a position corresponding to the first constriction portion; as well as A second cooling device is provided corresponding to the first cooling device to cool the other side of the battery separator, wherein a cooling space is defined between the first cooling device and the second cooling device, and the battery separator is located in the cooling space, wherein the second cooling device comprises: Second fluid supply source; The second hollow tube includes: a second inlet formed at one end of the second hollow tube and connected to the second fluid supply source; a second outlet formed at the other end of the second hollow tube; and a second flow guiding space formed inside the second hollow tube and connected to the second inlet and the second outlet, respectively, wherein the second flow guiding space includes: The second tapering space has one end connected to the second input port; The second expanding space has one end connected to the second output port and the other end connected to the second contracting space; and The second constriction is formed at the intersection of the second narrowing space and the second widening space, wherein the smallest opening in the second guide space is located at the second constriction. as well as The second refrigeration unit is disposed in the second flow guide space and is located at a position corresponding to the second constriction portion.

2. The battery separator cooling system according to claim 1, characterized in that, in: The first fluid supply source is connected to the first input port and supplies the first fluid to the first input port, so that the first fluid can flow sequentially to the first narrowing space, the first constriction portion and the first expanding space, and then be output from the first output port to contact the side of the battery separator. as well as The second fluid supply source is connected to the second inlet and supplies the second fluid to the second inlet, so that the second fluid can flow sequentially to the second constricting space, the second narrowing section and the second expanding space, and then be output from the second outlet to contact the other side of the battery separator.

3. The battery separator cooling system according to claim 2, characterized in that, The first fluid is a gas and the second fluid is a gas.

4. The battery separator cooling system according to claim 1, characterized in that, It further includes actuators that are connected to the first cooling device and the second cooling device respectively, to adjust the distance between the first cooling device and the battery separator, the distance between the second cooling device and the battery separator, or the height of the cooling space.

5. The battery separator cooling system according to claim 4, characterized in that... : The actuator is connected to the first cooling device by a threaded fastening, pivot connection, or snap-fit; and The connection between the actuator and the second cooling device is by threaded fastening, pivoting, or snap-fit.

6. The battery separator cooling system according to claim 1, characterized in that, It also includes: The first temperature sensor is disposed on the first cooling device to sense the surface temperature of the battery separator on the side close to the first cooling device. as well as The second temperature sensor is disposed on the second cooling device to sense the surface temperature of the battery separator on the side closest to the second cooling device.

7. The battery separator cooling system according to claim 1, characterized in that... : The cross-sectional shape of the first flow guiding space is circular or elliptical; and The cross-sectional shape of the second flow guiding space is circular or elliptical.

8. The battery separator cooling system according to claim 1, characterized in that, The axis of the first hollow tube is parallel to the axis of the second hollow tube.

9. The battery separator cooling system according to claim 8, characterized in that... : The angle formed between the axis of the first hollow tube and one side of the battery separator is 30° to 60°; and The angle between the axis of the second hollow tube and the other side of the battery separator is 30° to 60°.

10. The battery separator cooling system according to claim 1, characterized in that... : The opening size of the end of the first flow guiding space that contacts the first input port is larger than the opening size of the end of the first flow guiding space that contacts the first output port, and the opening size of the end of the second flow guiding space that contacts the second input port is larger than the opening size of the end of the second flow guiding space that contacts the second output port. The opening size of the end of the first flow guiding space that contacts the first input port is larger than the opening size of the end of the first flow guiding space that contacts the first output port, and the opening size of the end of the second flow guiding space that contacts the second input port is smaller than the opening size of the end of the second flow guiding space that contacts the second output port. The opening size of the end of the first flow guiding space that contacts the first input port is smaller than the opening size of the end of the first flow guiding space that contacts the first output port, and the opening size of the end of the second flow guiding space that contacts the second input port is larger than the opening size of the end of the second flow guiding space that contacts the second output port. The opening size of the end of the first flow guiding space that contacts the first input port is smaller than the opening size of the end of the first flow guiding space that contacts the first output port, and the opening size of the end of the second flow guiding space that contacts the second input port is smaller than the opening size of the end of the second flow guiding space that contacts the second output port. or The size of the opening at the end of the first flow guide space that contacts the first input port is equal to the size of the opening at the end of the first flow guide space that contacts the first output port, and the size of the opening at the end of the second flow guide space that contacts the second input port is equal to the size of the opening at the end of the second flow guide space that contacts the second output port.

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