Temperature control device for longitudinally pulling battery diaphragm

Abstract

The utility model discloses a temperature control device for longitudinal stretching of a battery diaphragm, the temperature control device comprises a plurality of roller temperature units, each roller temperature unit is in fluid communication with at least one roller, each roller comprises an oil inlet and an oil outlet, each roller temperature unit comprises a temperature sensor, a three-way valve, a hot oil pump and a condenser, the temperature sensor monitors the temperature of the corresponding roller in real time, the three-way valve comprises an inlet in fluid communication with the oiling channel, a first outlet in fluid communication with an input port of the hot oil pump and a second outlet in fluid communication with the oil return channel, and the inlet and the first outlet are in fluid communication to form a first branch; the inlet is in fluid communication with the second outlet to form a second branch, the three-way valve is in signal connection with the temperature sensor to adjust the flow of the first branch and the flow of the second branch, and the condenser is provided with an inner circulation pipeline communicating with the output port of the hot oil pump and the oil inlet and an outer circulation pipeline communicating with a cooling medium source fluid; the flow of the first branch and the flow of the second branch are adjusted, and the roller temperature is accurately controlled.

Description

Technical Field

[0001] The present application relates to the technical field of battery diaphragm production equipment, and in particular to a temperature control device for longitudinal drawing of battery diaphragms. Background Art

[0002] When longitudinally stretching the battery diaphragm, it is necessary to preheat the battery diaphragm first, and after the preheating, the battery diaphragm is longitudinally stretched at a stable temperature through stretching rollers. After the longitudinal stretching is completed, the battery diaphragm is also required to be cooled and formed by shaping rollers with a certain low temperature, so as to achieve longitudinal stretching of the battery diaphragm. If the temperature of each roller is unstable, it is easy to affect the stretching and shaping of the battery diaphragm, and ultimately affect the quality of the product. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the purpose of the present application is to provide a temperature control device for longitudinal drawing of battery diaphragms.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a temperature control device for longitudinal drawing of battery diaphragms, which is connected to multiple roller fluids of a longitudinal drawing device for longitudinally stretching the battery diaphragms, the temperature control device includes multiple roller temperature units, each of the roller temperature units is connected to at least one of the roller fluids, the roller includes an oil inlet for inputting a heating medium and an oil outlet for outputting a heating medium, each of the roller temperature units includes a temperature sensor, a three-way valve, a hot oil pump and a condenser, the temperature sensor is arranged at the oil inlet of the corresponding roller to monitor the temperature of the corresponding roller in real time, the three-way valve includes a An inlet connected to the oil passage fluid, a first outlet connected to the input fluid of the hot oil pump, and a second outlet connected to the return oil passage fluid for recovering the heating medium, the inlet is connected to the first outlet fluid to form a first branch, the inlet is connected to the second outlet fluid to form a second branch, the three-way valve is connected to the temperature sensor signal to adjust the flow of the first branch and the flow of the second branch, the condenser has an internal circulation pipeline connected to the output port of the hot oil pump and the oil inlet, and an external circulation pipeline connected to the cooling medium source fluid, and the internal circulation pipeline and the external circulation pipeline are independently arranged.

[0005] In the above technical solution, it is further preferred that filters are provided at the inlet of the three-way valve, the input port of the hot oil pump and the oil inlet of each roller.

[0006] In the above technical solution, it is further preferred that a check valve is provided at the second outlet of the three-way valve, the output port of the hot oil pump and the oil return passage, and the check valve in the oil return passage is used to block the one-way fluid connection between the second outlet of the three-way valve and the input port of the hot oil pump.

[0007] In the above technical solution, it is further preferred that the three-way valve is a pneumatic three-way proportional valve.

[0008] In the above technical solution, it is further preferred that the output port of the hot oil pump is provided with a pressure gauge, and the pressure gauge is used to measure the pressure in the internal circulation pipeline.

[0009] In the above technical solution, it is further preferred that a pressure relief circuit is connected between the output port of the hot oil pump and the internal circulation pipeline, and a pressure relief valve connected to the pressure gauge signal is provided in the pressure relief circuit.

[0010] In the above technical solution, it is further preferred that each of the roller temperature units is fluidly connected to the two rollers, the oil inlet of one roller is fluidly connected to the internal circulation pipeline, and the oil outlet of the roller is fluidly connected to the oil inlet of another roller, and the oil outlet of the other roller is fluidly connected to the hot oil pump and the oil return passage.

[0011] In the above technical solution, it is further preferred that each of the roller temperature units is in fluid communication with the three rollers, and the flow channels in the three rollers are sequentially connected in series.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present application adjusts the flow rate of hot oil with high temperature supplied to the roller from the oil supply passage through the cooperation of a three-way valve and a temperature sensor, thereby achieving precise control of the roller temperature and ensuring the constant temperature inside the roller. The application has a simple structure and rapid adjustment, and can effectively improve the production efficiency and quality of battery separators. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A front view of a roller temperature unit of a temperature control device provided in an embodiment of the present application;

[0015] Figure 2 for Figure 1 A top view of the roller temperature unit in FIG.

[0016] Figure 3 for Figure 2 Working principle diagram of the roller temperature unit being connected with the roller;

[0017] Figure 4 for Figure 3 Flow chart of the hot oil delivery in the roller temperature unit.

[0018] Among them: 10, longitudinal pulling equipment; 1, roller; 11, oil inlet; 12, oil outlet; 20, roller temperature unit; 2, temperature sensor; 3, three-way valve; 31, inlet; 32, first outlet; 33, second outlet; 4, hot oil pump; 41, input port; 42, output port; 5, condenser; 51, internal circulation pipeline; 6, filter; 7, check valve; 8, pressure gauge; 9, pressure relief valve; 30, oil supply passage; 40, oil return passage. DETAILED DESCRIPTION

[0019] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0020] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0021] An embodiment of the present application provides a temperature control device for longitudinal stretching of a battery diaphragm. The battery diaphragm is longitudinally stretched on a longitudinal stretching device. The longitudinal stretching device has multiple preheating rollers, stretching rollers and shaping rollers. Each roller needs to maintain a certain temperature to facilitate preheating, stretching and shaping of the battery diaphragm on the longitudinal stretching device.

[0022] like Figure 3 As shown, the temperature control device is fluidly connected to multiple rollers 1 of the longitudinal drawing device 10 to accurately control the roller surface temperature of each roller 1. The temperature control device includes multiple roller temperature units 20, each roller temperature unit 20 is connected to at least one roller 1 to control the temperature of the roller 1, each roller 1 includes an oil inlet 11 for inputting heating oil into the roller 1 and an oil outlet 12 for outputting heating oil from the roller 1, and the roller temperature unit 20 adjusts the temperature of the hot oil input to the roller 1 to achieve control of the roller surface temperature of the roller 1.

[0023] like Figure 1-3 As shown, each roller temperature unit 20 includes a temperature sensor 2, a three-way valve 3, a hot oil pump 4 and a condenser 5. The temperature sensor 2 is arranged at the oil inlet 11 of the corresponding roller 1 to monitor the temperature of the hot oil entering the roller 1 in real time.

[0024] like Figure 3 , 4 As shown, the three-way valve 3 includes an inlet 31 in fluid communication with the oil supply passage 30 for providing hot oil, a first outlet 32 ​​in fluid communication with the input port 41 of the hot oil pump 4, and a second outlet 33 in fluid communication with the oil return passage 40 for recovering hot oil. The three-way valve 3 includes a first branch connecting the inlet 31 and the first outlet 32 ​​and a second branch connecting the inlet 31 and the second outlet 33. The three-way valve 3 is connected to the temperature sensor 2 signal. The three-way valve 3 is configured to proportionally adjust the flow of the first branch and the flow of the second branch based on the detection result of the temperature sensor 2. In the embodiment of the present application, the three-way valve 3 is a pneumatic three-way proportional valve, which is more sensitive and can flexibly adjust the flow of the first branch and the second branch, so as to instantly and accurately adjust the inlet temperature of the oil entering the roller 1.

[0025] The hot oil pump 4 has an output port 42 connected to the condenser 5 . The hot oil pump 4 is used to pump the hot oil received by the input port 41 into the condenser 5 , and the condenser 5 adjusts the temperature of the hot oil.

[0026] The condenser 5 has an internal circulation pipeline 51 connected to the output port 42 and the oil inlet 11 of the hot oil pump 4, and an external circulation pipeline (not shown in the figure) connected to a cooling water source fluid for providing cooling water. The internal circulation pipeline 51 and the external circulation pipeline are arranged independently of each other. The hot oil in the internal circulation pipeline 51 exchanges heat with the cooling water in the external circulation pipeline, and the cooling water cools the hot oil.

[0027] The three-way valve 3 has a controller, in which the oil inlet temperature of the corresponding roller 1 is input in advance. When the temperature sensor 2 detects that the temperature of the hot oil entering the roller 1 is higher than the preset oil inlet temperature, the temperature sensor 2 transmits the detection result to the controller of the three-way valve 3. If the temperature difference between the real-time detected oil inlet temperature and the preset oil inlet temperature is large, the controller controls the second branch of the three-way valve 3 to be connected, and the three-way valve 3 blocks the fluid communication between the oil supply passage 30 and the hot oil pump 4. The output port 42 of the hot oil pump 4, the internal circulation pipeline 51, the oil inlet port 11, the oil outlet port 12 and the hot oil pump 4 The input ports 41 are fluidically connected in sequence to form an internal circulation loop. The hot oil pump 4 transports the hot oil output from the roller 1 to the internal circulation pipeline 51 of the condenser 5 for cooling. The cooled hot oil is transported to the roller 1 again. If the oil inlet temperature is still higher than the preset oil inlet temperature, the hot oil continues to circulate in the internal circulation loop for cooling until the temperature detected by the temperature sensor 2 drops to the preset oil inlet temperature. If the temperature difference is small, the flow rate of the second branch is increased, the flow rate of the first branch is reduced, the replenishment of the hot oil with a higher temperature is reduced, and the hot oil temperature is lowered through the condenser 5. When the temperature sensor 2 detects that the temperature of the hot oil entering the roller 1 is lower than the preset oil inlet temperature, if the temperature difference is large, the three-way valve 3 conducts the first branch and blocks the second branch, and delivers more hot oil with high temperature to the inner circulation loop to quickly increase the oil inlet temperature until the oil inlet temperature reaches the preset oil inlet temperature; if the temperature difference is small, the flow of the second branch is reduced, the flow of the first branch is increased, and the replenishment of hot oil with high temperature is increased to increase the oil inlet temperature until the oil inlet temperature detected by the temperature sensor 2 reaches the preset oil inlet temperature. The three-way valve 3 adjusts the flow of the first branch and the second branch based on the detection result of the temperature sensor 2. When the oil inlet temperature is low, the flow of the first branch is increased, and the hot oil with high temperature is replenished from the first branch. When the oil inlet temperature is high, the flow of the first branch is reduced and the replenishment of hot oil with high temperature is reduced. By the cooperation of the three-way valve 3 and the temperature sensor 2, the larger the flow rate of the first branch, the higher the roller temperature, and the smaller the flow rate of the first branch, the lower the roller temperature. The oil inlet temperature can be flexibly and accurately adjusted, and the roller surface temperature of the roller 1 can be kept within 0.1°C, thereby improving the production quality and efficiency of battery separators.

[0028] Filters 6 are provided at the inlet 31 of the three-way valve 3, the input port 41 of the hot oil pump 4 and the oil inlet 11 of each roller 1. The filter 6 is used to filter impurities in the hot oil to prevent the impurities from affecting the performance of the three-way valve 3 and the hot oil pump 4, and affecting the roller temperature regulation of the roller 1.

[0029] A check valve 7 is provided at the second outlet 33 of the three-way valve 3 and the output port 42 of the hot oil pump 4 to prevent the output hot oil from flowing back and affecting the operation of various components; and a check valve 7 is also provided in the reflux passage 40, which blocks the second outlet 33 and the input port 41 of the hot oil pump 4, and is used to prevent the hot oil transported from the second outlet 33 of the three-way valve 3 to the reflux passage 40 from flowing back into the internal circulation loop under the action of the hot oil pump 4, thereby affecting the temperature control of the roller temperature unit 20.

[0030] like Figure 3 As shown, the output port 42 of the hot oil pump 4 is provided with a pressure gauge 8, and the pressure gauge 8 is used to measure the pressure in the inner circulation pipeline 51. A pressure relief circuit is connected between the output port 42 of the hot oil pump 4 and the inner circulation pipeline 51, and a pressure relief valve 9 connected to the signal of the pressure gauge 8 is provided in the pressure relief circuit. Due to temperature regulation, hot oil with high temperature needs to be added to the inner circulation circuit, so that the pressure in the inner circulation pipeline 51 increases, and the pressure relief valve 9 needs to be opened to relieve the pressure in the pipeline. The pressure gauge 8 and the pressure relief circuit ensure that the pressure in the roller temperature unit is constant, thereby improving the stability of production.

[0031] In order to improve the temperature adjustment efficiency of the roller temperature unit 20, the roller temperature unit 20 controls the temperature of two rollers 1 and more than two rollers 1 at the same time. In the embodiment of the present application, there are more preheating rollers and stretching rollers, so they are respectively connected to a roller temperature unit 20 in pairs for temperature control. The oil inlet 11 of one roller 1 is connected to the internal circulation pipeline 51, and the oil outlet 12 of the roller 1 is connected to the oil inlet 11 of another roller 1. The oil outlet 12 of another roller 1 is connected to the hot oil pump 4 and the oil return passage 40. The number of shaping rollers is small, and three shaping rollers are connected to one roller temperature unit 20. The three shaping rollers are connected in series in sequence, and the hot oil output from the internal circulation pipeline 51 flows through the inside of the three connected shaping rollers in sequence.

[0032] The roller temperature units 20 of the preheating roller, the stretching roller and the shaping roller are all connected to the oil supply passage 30, the oil return passage 40 and the cooling water source.

[0033] The present application adjusts the flow rate of hot oil with high temperature supplied to the roller from the oil supply passage through the cooperation of a three-way valve and a temperature sensor, thereby achieving precise control of the roller temperature and ensuring the constant temperature inside the roller. The application has a simple structure and rapid adjustment, and can effectively improve the production efficiency and quality of battery separators.

[0034] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.

Claims

1. A temperature control device for longitudinally stretching a battery separator, which is fluidically connected to a plurality of rollers of a longitudinally stretching device for longitudinally stretching the battery separator, characterized in that: The temperature control device includes a plurality of roller temperature units, each of which is fluidly connected to at least one of the rollers, and the roller includes an oil inlet for inputting a heating medium and an oil outlet for outputting a heating medium. Each of the roller temperature units includes a temperature sensor, a three-way valve, a hot oil pump and a condenser. The temperature sensor is arranged at the oil inlet of the corresponding roller to monitor the temperature of the corresponding roller in real time. The three-way valve includes an inlet fluidly connected to an oil supply passage for providing the heating medium, a first outlet fluidly connected to an input port of the hot oil pump, and a second outlet fluidly connected to an oil return passage for recovering the heating medium. The inlet is fluidly connected to the first outlet to form a first branch, and the inlet is fluidly connected to the second outlet to form a second branch. The three-way valve is connected to the temperature sensor signal to adjust the flow of the first branch and the flow of the second branch. The condenser has an internal circulation pipeline connecting the output port of the hot oil pump and the oil inlet, and an external circulation pipeline fluidly connected to a cooling medium source. The internal circulation pipeline and the external circulation pipeline are independently arranged.

2. The temperature control device according to claim 1, characterized in that: The inlet of the three-way valve, the input port of the hot oil pump and the oil inlet of each roller are all provided with filters.

3. The temperature control device according to claim 1, characterized in that: Check valves are provided at the second outlet of the three-way valve, the output port of the hot oil pump and the oil return passage. The check valve in the oil return passage is used to block the one-way fluid connection between the second outlet of the three-way valve and the input port of the hot oil pump.

4. The temperature control device according to claim 1, characterized in that: The three-way valve is a pneumatic three-way proportional valve.

5. The temperature control device according to claim 1, characterized in that: The output port of the hot oil pump is provided with a pressure gauge, and the pressure gauge is used to measure the pressure in the internal circulation pipeline.

6. The temperature control device according to claim 5, characterized in that: A pressure relief circuit is connected between the output port of the hot oil pump and the internal circulation pipeline, and a pressure relief valve connected to the pressure gauge signal is arranged in the pressure relief circuit.

7. The temperature control device according to claim 1, characterized in that: Each of the roller temperature units is fluidly connected to the two rollers, the oil inlet of one roller is fluidly connected to the internal circulation pipeline, and the oil outlet of the roller is fluidly connected to the oil inlet of another roller, and the oil outlet of the other roller is fluidly connected to the hot oil pump and the oil return passage.

8. The temperature control device according to claim 1, characterized in that: Each of the roller temperature units is in fluid communication with the three rollers, and the flow channels in the three rollers are sequentially connected in series.

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