Stirring material tank for monitoring real-time temperature of coating slurry

Abstract

The utility model relates to a stirring material tank for monitoring the real-time temperature of coating slurry, and the stirring material tank comprises a stirring material tank, the stirring material tank comprises a tank body, a stirring paddle for stirring the coating slurry is arranged in the tank body, the bottom of the tank body is provided with a discharge port, and the discharge port is sequentially connected with a valve and a screw pump through a discharge pipeline; the temperature measuring unit comprises a Wheatstone bridge formed by sequentially connecting a first resistor R1, a second resistor R2, a third resistor R3 and a thermal resistor Rt, the thermal resistor Rt is located at the position of the discharging port in the tank body, and a voltmeter is connected to the Wheatstone bridge. When the resistance value of the thermal resistor Rt changes along with the temperature change of the coating slurry, the voltmeter collects the voltage difference of the Wheatstone bridge, the sampled data are converted to obtain the temperature value, the temperature can be monitored through the temperature measuring unit, the precision of 0.01 DEG C can be achieved, the temperature of the slurry can be adjusted in real time, and the temperature of the coating slurry can be adjusted in real time. And the coating slurry is always in an available state.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and particularly relates to a stirring tank for monitoring the real-time temperature of coating slurry. Background Art

[0002] With the continuous development of the new energy industry, batteries are favored by many consumers due to their mature processes, high safety, and stable charge and discharge processes. The demand for batteries and their related products is also gradually increasing. Restricted by the highly active lithium ions in the battery slurry, the battery electrode sheets have extremely strict requirements for the environment during the production process. The slurry used to produce the battery electrode sheets needs to be homogenized to be evenly dispersed, and its viscosity, fineness, solid content, etc. are also adjusted in the corresponding processes to ensure compliance with requirements.

[0003] In actual operation, the slurry flows through the feeding system to the coating die head for coating. During this process, since a large amount of heat is generated due to the mechanical movement of the dispersion disk during the homogenization of the slurry, there are significant differences in the actual rheological properties of the slurry, which directly affects the leveling property of the slurry at the coating die head, resulting in a large fluctuation in the coating surface density. The continuous surface density fluctuation will cause a high concentration of active substances at this position, and lithium deposition may occur at the corresponding position, posing a great threat to the safety of the battery electrode sheet. Therefore, it is necessary to design a real-time adjustment of the slurry temperature to avoid temperature fluctuations of the slurry and ensure that the slurry is always in a usable state. Summary of the Invention

[0004] The embodiments of the present application provide a stirring tank for monitoring the real-time temperature of coating slurry to solve the problem of how to monitor the temperature of the coating slurry in real time to avoid temperature fluctuations of the coating slurry.

[0005] The embodiments of the present application provide a stirring tank for monitoring the real-time temperature of coating slurry, including:

[0006] A stirring tank, the stirring tank includes a tank body, a stirring paddle for stirring the coating slurry is provided in the tank body, a discharge port is provided at the bottom of the tank body, and the discharge port is sequentially connected with a valve and a screw pump through a discharge pipeline;

[0007] A temperature measuring unit, the temperature measuring unit includes a Wheatstone bridge in which a first resistor R1, a second resistor R2, a third resistor R3, and a thermal resistor Rt are connected in sequence. The thermal resistor Rt is located at the discharge port position in the tank body, and a voltmeter is connected to the Wheatstone bridge.

[0008] In some embodiments: the common connection point of the first resistor R1 and the thermal resistor Rt is the output terminal C of the Wheatstone bridge, the common connection point of the second resistor R2 and the third resistor R3 is the output terminal D of the Wheatstone bridge, and the voltmeter is connected between the output terminal C and the output terminal D.

[0009] In some embodiments, a common connection point of the first resistor R1 and the second resistor R2 forms a first input terminal A, a common connection point of the thermal resistor Rt and the third resistor R3 forms a second input terminal B, and a power supply is connected between the first input terminal A and the second input terminal B.

[0010] In some embodiments, a junction box is hermetically connected to the tank body, a terminal block for connecting the thermal resistor Rt is provided on the junction box, and the first resistor R1, the third resistor R3, and the power supply are electrically connected to the thermal resistor Rt through the terminal block.

[0011] In some embodiments, the temperature measurement unit further includes a controller and a display connected to a voltmeter. The controller is configured to receive the voltage value of the voltmeter and output a temperature value to the display according to the voltage value.

[0012] In some embodiments, a heating pipe for heating the coating slurry is provided on the inner wall of the tank body. The heating pipe is wound around the bottom and the surrounding inner wall of the tank body, and the heating pipe is electrically connected to the controller.

[0013] In some embodiments, a feed pipe is connected to the tank body, and a steel shell filter element is connected to the feed pipe.

[0014] In some embodiments, a high-efficiency filter element is further connected to the discharge pipeline. The high-efficiency filter element is located downstream of the screw pump, and the outlet of the discharge pipeline is connected to a coating die head.

[0015] In some embodiments, an opening is provided at the top of the tank body. A motor for connecting the stirring paddle is provided at the top of the tank body. The motor is connected to the stirring paddle through a shaft rod, and the stirring paddle is a dispersion disk.

[0016] In some embodiments, a cover plate for closing the opening is provided at the top of the tank body, and a one-way exhaust valve is provided on the cover plate.

[0017] The beneficial effects brought by the technical solution provided in this application include:

[0018] The embodiment of this application provides a stirring tank for monitoring the real-time temperature of coating slurry. Since the stirring tank for monitoring the real-time temperature of coating slurry in this application is provided with a stirring tank, the stirring tank includes a tank body, a stirring paddle for stirring the coating slurry is provided in the tank body, a discharge port is provided at the bottom of the tank body, and the discharge port is sequentially connected with a valve and a screw pump through a discharge pipeline; a temperature measurement unit, the temperature measurement unit includes a Wheatstone bridge formed by sequentially connecting a first resistor R1, a second resistor R2, a third resistor R3, and a thermal resistor Rt, the thermal resistor Rt is located at the discharge port position in the tank body, and a voltmeter is connected to the Wheatstone bridge.

[0019] Therefore, the stirring tank for monitoring the real-time temperature of the coating slurry in the present application is provided with a temperature measuring unit for monitoring the coating slurry in the tank body. The temperature measuring unit includes a Wheatstone bridge connected in sequence by a first resistor R1, a second resistor R2, a third resistor R3, and a thermal resistor Rt, and the thermal resistor Rt is located at the discharge port position in the tank body. Among the Wheatstone bridge, the resistance values of three resistors are fixed, namely the first resistor R1, the second resistor R2, and the third resistor R3, and the thermal resistor Rt is a variable resistor. When the resistance value of the thermal resistor Rt changes with the change of the temperature of the coating slurry, the voltage difference of the Wheatstone bridge is collected by a voltmeter, and the temperature value can be obtained through conversion of the sampled data. The temperature can be monitored by the temperature measuring unit with an accuracy of 0.01 °C, and then the temperature of the slurry can be adjusted in real time to keep the coating slurry always in a usable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Structural schematic diagram of an embodiment of the present application;

[0022] Figure 2 Structural schematic diagram of the temperature measuring unit of an embodiment of the present application.

[0023] Reference numerals:

[0024] 1, tank body; 2, stirring paddle; 3, valve; 4, screw pump; 5, temperature measuring unit; 6, feed pipe; 7, steel shell filter element; 8, discharge pipeline; 9, high-efficiency filter element; 10, coating die head; 11, junction box; 12, voltmeter; 13, power supply. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] The embodiment of the present application provides a stirring tank for monitoring the real-time temperature of the coating slurry, which can solve the problem of how to monitor the temperature of the coating slurry in real time to avoid temperature fluctuations of the coating slurry.

[0027] See Figure 1and Figure 2 As shown in Figure 2 , an embodiment of the present application provides a stirring tank for monitoring the real-time temperature of coating slurry, including:

[0028] A stirring tank, which includes a tank body 1. Inside the tank body 1, there is a stirring paddle 2 for stirring the coating slurry. At the bottom of the tank body 1, there is a discharge port, and the discharge port is sequentially connected with a valve 3 and a screw pump 4 through a discharge pipeline 8. The stirring paddle 2 is used to uniformly disperse the positive and negative active powder materials, conductive agent powder, polymer binder and additives entering the tank body 1 in the solvent to form a stable suspension. The valve 3 and the screw pump 4 are used to discharge the coating slurry located in the tank body 1.

[0029] A temperature measurement unit 5, which includes a Wheatstone bridge formed by sequentially connecting a first resistor R1, a second resistor R2, a third resistor R3 and a thermal resistor Rt. Among them, the thermal resistor Rt is located at the discharge port position inside the tank body 1. A voltmeter 12 is connected to the Wheatstone bridge, and the voltmeter 12 is used to detect the voltage drop change of the Wheatstone bridge. The first resistor R1, the second resistor R2 and the third resistor R3 are all fixed-value resistors, and the thermal resistor Rt is a temperature-sensitive resistor. The resistance value of the thermal resistor Rt changes linearly with the change of the temperature of the coating slurry.

[0030] The stirring tank for monitoring the real-time temperature of the coating slurry in the embodiment of the present application is provided with a temperature measurement unit 5 for monitoring the coating slurry inside the tank body 1. The temperature measurement unit 5 includes a Wheatstone bridge formed by sequentially connecting a first resistor R1, a second resistor R2, a third resistor R3 and a thermal resistor Rt, and the thermal resistor Rt is located at the discharge port position inside the tank.

[0031] In the Wheatstone bridge, three resistor values are fixed, namely the first resistor R1, the second resistor R2 and the third resistor R3, and the thermal resistor Rt is a variable resistor. The resistance value of the thermal resistor Rt also changes with the change of the temperature of the coating slurry. The voltmeter 12 collects the voltage difference of the Wheatstone bridge, and the temperature value can be obtained through conversion of the sampled data. The temperature can be monitored through the temperature measurement unit 5 with an accuracy of 0.01 °C, and then the temperature of the slurry can be adjusted in real time to keep the coating slurry always in a usable state.

[0032] In some alternative embodiments: Refer to Figure 2 As shown in Figure 2 , an embodiment of the present application provides a stirring tank for monitoring the real-time temperature of coating slurry. The common connection point of the first resistor R1 and the thermal resistor Rt of the stirring tank for monitoring the real-time temperature of the coating slurry is the output terminal C of the Wheatstone bridge, and the common connection point of the second resistor R2 and the third resistor R3 is the output terminal D of the Wheatstone bridge. The voltmeter 12 is connected between the output terminal C and the output terminal D.

[0033] The common connection point of the first resistor R1 and the second resistor R2 forms a first input terminal A, and the common connection point of the thermal resistor Rt and the third resistor R3 forms a second input terminal B. A power supply 13 is connected between the first input terminal A and the second input terminal B.

[0034] Due to the characteristics of the thermal resistor Rt itself, the resistance value of the thermal resistor Rt changes with the temperature of the coated slurry, and thus a potential difference appears between the output terminals C of the first resistor R1 and the thermal resistor Rt, and the output terminals D of the second resistor R2 and the third resistor R3, and then is displayed by the voltmeter 12. If the voltage of the power supply 13 is E, then according to the Wheatstone bridge principle, the voltage U shown by the voltmeter 12 can be obtained;

[0035]

[0036] Rt can be obtained. And Rt = R0[1 + A0T + B0T 2 + C0(T - 100)T 3 (T < 0 °C)

[0037] Rt = R0[1 + A0T + B0T 2 (T > 0 °C)

[0038] The measured temperature T of the thermal resistor Rt can be obtained

[0039]

[0040] Among them, R0 is the resistance value of the thermal resistor Rt at 0 °C, which is determined by the resistance model itself. For example, when using a PT100 type thermal resistor, R0 is 100 Ω. A0, B0, and C0 are Callendar-Van Dusen constants.

[0041] In some alternative embodiments: Refer to Figure 2 As shown, the embodiment of the present application provides a stirring tank for monitoring the real-time temperature of the coated slurry. A junction box 11 is hermetically connected to the tank body 1 of the stirring tank for monitoring the real-time temperature of the coated slurry. A terminal block for connecting the thermal resistor Rt is provided on the junction box 11. The first resistor R1, the third resistor R3, and the power supply 13 are electrically connected to the thermal resistor Rt through the terminal block.

[0042] The temperature measurement unit 5 further includes a controller (not shown in the figure) and a display (not shown in the figure) connected to the voltmeter 12. The controller is used to receive the voltage value of the voltmeter 12, convert it into a temperature value according to the voltage value, and output the temperature value to the display. A heating pipe (not shown in the figure) for heating the coated slurry is provided on the inner wall of the tank body 1. The heating pipe is coiled around the bottom and the inner periphery of the tank body 1. The heating pipe is electrically connected to the controller. The controller compares the current temperature value with the set temperature threshold, and then controls whether to heat the coated slurry by the heating pipe.

[0043] In some alternative embodiments: Refer to Figure 1 As shown, the embodiment of the present application provides a stirring tank for monitoring the real-time temperature of coating slurry. A feed pipe 6 is connected to the tank body 1 of the stirring tank for monitoring the real-time temperature of coating slurry. A steel shell filter element 7 is connected to the feed pipe 6. The steel shell filter element 7 is used to filter the positive and negative active powder materials, conductive agent powder, polymer binder and additives entering the tank body 1.

[0044] A high-efficiency filter element 9 is also connected to the discharge pipeline 8. The high-efficiency filter element 9 is located downstream of the screw pump 4. The outlet of the discharge pipeline 8 is connected to a coating die head 10. The high-efficiency filter element 9 is used to filter the coating slurry discharged from the tank body 1 to capture particulate dust and various suspended matters with a size of more than 0.5 μm in the coating slurry.

[0045] The top of the tank body 1 is provided with an opening. A motor for connecting the stirring paddle 2 is provided at the top of the tank body. The motor is connected to the stirring paddle 2 through a shaft rod. The stirring paddle 2 is preferably a dispersion disc. A cover plate for closing the opening is provided at the top of the tank body 1. A one-way exhaust valve is provided on the cover plate. The one-way exhaust valve is used to discharge the gas in the tank body 1 so that the positive and negative active powder materials, conductive agent powder, polymer binder and additives can quickly enter the tank body 1.

[0046] Working principle

[0047] The embodiment of the present application provides a stirring tank for monitoring the real-time temperature of coating slurry. Since the stirring tank for monitoring the real-time temperature of coating slurry of the present application is provided with a stirring tank, the stirring tank includes a tank body 1. A stirring paddle 2 for stirring the coating slurry is provided in the tank body 1. The bottom of the tank body 1 is provided with a discharge port. The discharge port is sequentially connected with a valve 3 and a screw pump 4 through a discharge pipeline 8; a temperature measuring unit 5. The temperature measuring unit 5 includes a Wheatstone bridge formed by sequentially connecting a first resistor R1, a second resistor R2, a third resistor R3 and a thermal resistor Rt. The thermal resistor Rt is located at the discharge port position in the tank body 1. A voltmeter 12 is connected to the Wheatstone bridge.

[0048] Therefore, the stirring tank for monitoring the real-time temperature of coating slurry of the present application is provided with a temperature measuring unit 5 for monitoring the coating slurry in the tank body. The temperature measuring unit 5 includes a Wheatstone bridge formed by sequentially connecting a first resistor R1, a second resistor R2, a third resistor R3 and a thermal resistor Rt, and the thermal resistor Rt is located at the discharge port position in the tank body 1.

[0049] In a Wheatstone bridge, three resistors have fixed resistance values, namely the first resistor R1, the second resistor R2, and the third resistor R3, and the thermal resistor Rt is a variable resistor. When the resistance value of the thermal resistor Rt changes with the temperature of the coated slurry, the voltmeter 12 collects the voltage difference of the Wheatstone bridge, and the temperature value can be obtained through conversion of the sampled data. The temperature can be monitored through the temperature measurement unit with an accuracy of 0.01 °C, and then the temperature of the slurry can be adjusted in real time to keep the coated slurry in a usable state at all times.

[0050] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0051] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0052] The above are only the specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A stirring tank for monitoring the real-time temperature of coating slurry, characterized in that, Comprising: A stirring material tank, the stirring material tank includes a tank body (1), a stirring paddle (2) for stirring coating slurry is arranged in the tank body (1), a discharge port is arranged at the bottom of the tank body (1), and the discharge port is sequentially connected with a valve (3) and a screw pump (4) through a discharge pipeline (8); A temperature measuring unit (5), the temperature measuring unit (5) includes a Wheatstone bridge in which a first resistor R1, a second resistor R2, a third resistor R3 and a thermal resistor Rt are connected in sequence, the thermal resistor RT is located at the discharge port position in the tank body (1), and a voltmeter (12) is connected to the Wheatstone bridge.

2. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 1, characterized in that: The common connection point of the first resistor R1 and the thermal resistor Rt is the output terminal C of the Wheatstone bridge, the common connection point of the second resistor R2 and the third resistor R3 is the output terminal D of the Wheatstone bridge, and the voltmeter (12) is connected between the output terminal C and the output terminal D.

3. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 1, characterized in that: The common connection point of the first resistor R1 and the second resistor R2 forms a first input terminal A, the common connection point of the thermal resistor Rt and the third resistor R3 forms a second input terminal B, and a power supply (13) is connected between the first input terminal A and the second input terminal B.

4. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 2, characterized in that: A junction box (11) is hermetically connected to the tank body (1), a terminal block for connecting the thermal resistor Rt is arranged on the junction box (11), and the first resistor R1, the third resistor R3 and the power supply are electrically connected to the thermal resistor Rt through the terminal block.

5. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 1, characterized in that: The temperature measuring unit (5) further includes a controller and a display connected to the voltmeter (12), the controller is used to receive the voltage value of the voltmeter (12), and output the temperature value to the display according to the voltage value.

6. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 5, characterized in that: A heating pipe for heating the coating slurry is arranged on the inner wall of the tank body (1), the heating pipe is coiled around the bottom and the inner wall around the tank body (1), and the heating pipe is electrically connected to the controller.

7. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 1, characterized in that: A feed pipe (6) is connected to the tank body (1), and a steel shell filter element (7) is connected to the feed pipe (6).

8. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 1, characterized in that: A high-efficiency filter element (9) is further connected to the discharge pipeline (8), the high-efficiency filter element (9) is located downstream of the screw pump (4), and the outlet of the discharge pipeline (8) is connected to a coating die head (10).

9. The stirring material tank for monitoring the real-time temperature of coating slurry according to claim 1, characterized in that: The top of the tank body (1) is provided with an opening, and a motor for connecting the stirring paddle (2) is arranged at the top of the tank body. The motor is connected to the stirring paddle (2) through a shaft rod, and the stirring paddle (2) is a dispersion disc.

10. The stirring tank for monitoring the real-time temperature of the coating slurry according to claim 9, wherein: The top of the tank body (1) is provided with a cover plate for closing the opening, and a one-way exhaust valve is arranged on the cover plate.

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