Intermittent valve, coating mechanism and system thereof

Abstract

The utility model relates to the field of battery cell manufacturing, in particular to an intermittent valve, a coating mechanism and a system thereof.The intermittent valve comprises a valve rod device, one end of the valve rod device is connected with a valve body, a valve cavity is formed in the valve body, an inlet part is formed in the valve body and communicates with the valve cavity, the valve rod device comprises a valve element, and the valve element is arranged in the valve cavity. The valve element is located in the valve cavity and comprises a first end face and a second end face, the second end face is close to the inlet portion, the size of the first end face is larger than that of the second end face, the first end face is configured to be a spherical face, and the second end face is configured to be a spherical face. The valve cavity is configured to be in a form of gradually expanding from the inlet part to the inside of the valve cavity, and by dispersing pressure change, relieving pressure mutation, optimizing a fluid path and providing a buffer area, the structure effectively solves the problem of first thickness in the coating process, ensures the uniformity and consistency of coating, and improves the coating efficiency. Therefore, the coating quality and the performance of the lithium ion battery are improved.

Description

Technical Field

[0001] The present application relates to the field of battery cell manufacturing, and in particular to an intermittent valve, a coating mechanism and a system thereof. Background Art

[0002] The positive and negative pole pieces of lithium-ion batteries are composed of current collectors and positive and negative active materials coated on the current collectors. The quality of coating directly affects the battery performance. In order to increase production, the coating speed usually exceeds 20m / s, and the intermittent valve needs to have extremely high sensitivity and fast opening and closing. However, the high-speed movement of the valve core (over 80m / s) will disrupt the stability of the slurry in the valve cavity, causing the pressure to increase instantly, affecting the coating quality. A common problem is that the starting part of the coating is too thick (i.e., the first thickness problem). At present, most valve cores in the form of sliders or adjusting piston devices are used to solve the first thickness problem, but the slider form is easy to cause eddy currents in the curved flow channel, thereby exacerbating the instability of the coating mechanism, and today's pressure regulating piston device cannot completely absorb the pressure fluctuations generated by the intermittent valve, so that part of the liquid will release pressure through the outlet, affecting the stability of the coating. Utility Model Content

[0003] The purpose of the present application is to provide an intermittent valve, a coating mechanism and a system thereof to address the problem in the prior art that the coating intermittent valve causes pressure fluctuations when moving at high speed, affecting the coating uniformity and stability.

[0004] In order to achieve the above purpose, the technical solution adopted in this application is:

[0005] An intermittent valve, the intermittent valve comprising a valve stem device, one end of the valve stem device is connected to a valve body, a valve cavity is provided in the valve body, an inlet is provided on the valve body, the inlet is communicated with the valve cavity, the valve stem device comprises a valve core, the valve core is located inside the valve cavity, the valve core comprises a first end face and a second end face, the second end face is close to the inlet, the size of the first end face is larger than the size of the second end face, and the first end face is configured as a spherical surface, and the valve cavity is configured to gradually expand from the inlet toward the inside of the valve cavity.

[0006] The present application is an intermittent valve, which is provided with an upper and a lower end face of an intermittent valve core as two end faces with different diameters, and the size of the first end face is larger than the size of the second end face, so that the valve core is in a trapezoidal shape, and the first end face body is an arc-shaped end, so that the fluid in the intermittent valve can flow more smoothly when the valve core runs at high speed, reducing the generation of eddy currents and turbulence, and also by arranging the valve cavity in a form in which the size gradually expands from the inlet toward the cavity, so that the fluid can be buffered when flowing, and the flow speed of the fluid is balanced, thereby reducing pressure fluctuations, and further reducing the impact and disturbance of the fluid in the valve cavity, and by dispersing pressure changes, alleviating pressure mutations, optimizing fluid paths and providing buffer zones, the structure effectively solves the "first thickness" problem in the coating process, ensures the uniformity and consistency of the coating, and thus improves the coating quality and the performance of lithium-ion batteries.

[0007] As a preferred solution of the present application, the valve stem device includes a valve stem, one end of which is connected to the valve core, and an end of the valve stem away from the valve core is provided with a driving device, so that the intermittent valve can operate.

[0008] As a preferred embodiment of the present application, the intermittent valve includes a reflux pipeline, which is connected to the valve cavity. A first reflux valve and a first pressure gauge are sequentially arranged on the reflux pipeline along the liquid flow direction. Such an arrangement enables the pressure in the valve cavity to be released and detected.

[0009] As a preferred solution of the present application, the valve cavity is connected to a liquid outlet pipeline, and a pressure reducing valve and a second pressure gauge are sequentially provided on the liquid outlet pipeline along the liquid flow direction. Such a setting can monitor the liquid pressure on the liquid outlet pipeline in real time and control it.

[0010] A coating mechanism comprises the above-mentioned intermittent valve, the coating mechanism comprises a second intermittent valve connected with the intermittent valve, and a third pressure gauge is arranged between the second intermittent valve and the intermittent valve.

[0011] The present application is a coating mechanism, which is provided with a second intermittent valve and an intermittent valve connected to the second intermittent valve. Since the valve core of the intermittent valve is provided with an arc-shaped end, and the valve cavity is arranged to gradually expand from the entrance toward the cavity, the coating mechanism has a stable fluid flow speed and small pressure fluctuation during operation, thereby solving the problem of the first thickness of the coating mechanism during the coating process and ensuring the uniformity and consistency of the coating.

[0012] As a preferred solution of the present application, a second valve stem device is provided in the second intermittent valve, one end of the second valve stem device is connected to a second driving device, and the other end of the second valve stem device is connected to a second valve cavity.

[0013] As a preferred solution of the present application, a second return pipeline is provided on the second valve cavity, and a fourth return valve and a fourth pressure gauge are provided on the second return pipeline in sequence along the liquid flow direction. This arrangement makes the pressure in the coating mechanism more stable and the fluid pressure conditions can be observed in real time.

[0014] As a preferred solution of the present application, a liquid inlet pipeline is provided on the second valve cavity, and a fifth pressure gauge is provided on the liquid inlet pipeline. Such a configuration can monitor the pressure condition of the liquid inlet pipeline in real time.

[0015] A coating system, the system comprises the coating mechanism mentioned above, and the system is communicatively connected with the coating mechanism.

[0016] The present application is a coating system, through which an operator can adjust and monitor the pressure data in each pipeline to improve the quality of coating.

[0017] As a preferred embodiment of the present application, the system includes a control device, which is communicatively connected with each pressure gauge and each reflux valve in the coating mechanism. The control device is configured to receive and record the pressure data in the pipeline, maintain the pressure balance in the pipeline according to the data, and ensure the coating quality. This arrangement enables the operator to monitor and manage the pressure in the coating mechanism in real time.

[0018] 1. The present application is an intermittent valve, which is provided with an upper and a lower end face of an intermittent valve core as two end faces with different diameters, and the size of the first end face is larger than the size of the second end face, so that the valve core is in a trapezoidal shape, and the first end face body is an arc-shaped end, so that the fluid in the intermittent valve can flow more smoothly when the valve core runs at high speed, reducing the generation of eddy currents and turbulence, and also by setting the valve cavity in a form in which the size gradually expands from the inlet toward the cavity, so that the fluid can be buffered when flowing, and the flow speed of the fluid is balanced, thereby reducing pressure fluctuations, and further reducing the impact and disturbance of the fluid in the valve cavity, and by dispersing pressure changes, alleviating pressure mutations, optimizing fluid paths and providing buffer zones, the structure effectively solves the "first thickness" problem in the coating process, ensures the uniformity and consistency of the coating, and thus improves the coating quality and the performance of lithium-ion batteries.

[0019] 2. The present application is a coating mechanism, which is provided with a second intermittent valve and an intermittent valve connected to the second intermittent valve. Since the valve core of the intermittent valve is provided with an arc-shaped end, and the valve cavity is arranged to gradually expand from the inlet toward the cavity, the coating mechanism has a stable fluid flow rate and small pressure fluctuations during operation, thereby solving the problem of the first thickness of the coating mechanism during the coating process and ensuring the uniformity and consistency of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of an intermittent valve of the present application;

[0021] Figure 2 is a schematic diagram of the valve stem device of the present application;

[0022] Figure 3 is a schematic diagram of the valve cavity of the present application;

[0023] Figure 4 It is a schematic diagram of the structure after the coating mechanism of the present application is connected with the coating system.

[0024] Icon: 1-control device; 2-valve stem device; 21-valve core; 211-first end face; 212-second end face; 22-valve stem; 3-valve body; 31-valve cavity; 4-driving device; 5-return pipeline; 51-first return valve; 52-first pressure gauge; 6-liquid outlet pipeline; 61-pressure reducing valve; 62-second pressure gauge; 7-second intermittent valve; 71-third pressure gauge; 72-second return pipeline; 721-fourth return valve; 722-fourth pressure gauge; 73-liquid inlet pipeline; 731-fifth pressure gauge; 74-second valve stem device; 75-second driving device; 76-second valve cavity. DETAILED DESCRIPTION

[0025] The present application is described in detail below in conjunction with the accompanying drawings.

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] like Figure 1-3 An intermittent valve is shown, the structure of which includes a valve stem device 2, one end of which is connected to a valve body 3, and the valve body 3 includes a valve cavity 31 for accommodating slurry, and the valve body 3 is also provided with an inlet portion, which is communicated with the valve cavity 31, and the inlet portion can ensure that the slurry flows into the valve cavity 31, and the valve stem device 2 includes a valve core 21, and the valve stem device 2 is provided with a valve core 21. One end of the valve core 21 is located inside the valve cavity 31, and the valve core 21 includes a first end face 211 located at the top and a second end face 212 located at the bottom of the valve core 21, and the first end face 211 is larger than the second end face 212, so that the valve core 21 is in a trapezoidal shape with a larger upper part and a smaller lower part, and the first end face 211 is a spherical surface, and the spherical surface allows the valve core 21 to reduce the friction of the slurry on the slurry when the slurry flows when the valve core 21 is running at a high speed, so that the slurry flows more smoothly, and the eddy current and turbulence when the slurry flows are reduced;

[0028] Furthermore, the valve cavity 31 gradually expands from the entrance to the inside to form a conical or trumpet-shaped channel. This design allows the cross-sectional area of ​​the channel to gradually increase when the fluid enters the valve cavity 31, thereby reducing the resistance to fluid flow, so that the fluid can be buffered when flowing, balancing the flow rate of the fluid, thereby reducing pressure fluctuations, further reducing the impact and disturbance of the fluid in the valve cavity 31, and by dispersing pressure changes, easing pressure mutations, optimizing fluid paths and providing buffer zones, this structure effectively solves the "first thickness" problem in the coating process, ensures the uniformity and consistency of coating, and thus improves the coating quality and the performance of lithium-ion batteries.

[0029] As mentioned above, the valve stem device 2 includes a valve stem 22, the valve stem 22 is connected to the valve core 21, and the end of the valve stem 22 not connected to the valve core 21 is provided with a driving device 4, the valve stem 22 is driven by the driving device 4 to move, and the valve core 21 is driven by the valve stem 22 to move in the valve cavity 31, so that the intermittent valve can work, such as Figure 1 shown.

[0030] As mentioned above, the intermittent valve includes a reflux pipeline 5, and the reflux pipeline 5 is connected to the valve cavity 31, and a first reflux valve 51 and a first pressure gauge 52 are sequentially arranged on the reflux pipeline 5, and the first reflux valve 51 and the first pressure gauge 52 are sequentially arranged along the liquid flow direction on the reflux pipeline 5, and the pressure on the reflux pipeline 5 can be monitored in real time through the first reflux valve 51 and the first pressure gauge 52, such as Figure 1 shown.

[0031] As mentioned above, one end of the valve body 3 is connected to a liquid outlet pipeline 6, and the liquid outlet pipeline 6 is connected to the valve cavity 31. In order to achieve effective monitoring and regulation of the liquid pressure, a pressure reducing valve 61 and a second pressure gauge 62 are sequentially arranged on the liquid outlet pipeline 6 along the liquid flow direction. The function of the pressure reducing valve 61 is to regulate the pressure of the liquid in the pipeline to ensure that the liquid is maintained in a safe and stable pressure range when flowing out. This can prevent excessive pressure from causing damage to subsequent equipment or pipelines. The second pressure gauge 62 is used to monitor the liquid pressure after the pressure reducing valve 61 in real time. Through this pressure gauge, the operator can understand the actual pressure value in the liquid outlet pipeline 6 at any time, and make corresponding adjustments and controls as needed, such as Figure 3 shown.

[0032] like Figure 4 A coating mechanism shown, the mechanism includes the above-mentioned intermittent valve, the coating mechanism includes a second intermittent valve 7 connected to the intermittent valve, and a third pressure gauge 71 is provided between the second intermittent valve 7 and the intermittent valve;

[0033] Furthermore, a second valve stem device 74 is provided in the second intermittent valve 7, one end of the valve stem device 2 is connected to the second driving device 75, and the other end is connected to the second valve cavity 76, and the second valve cavity 76 is connected to the second return line 72, and the fourth return valve 721 and the fourth pressure gauge 722 are sequentially provided on the second return line 72 along the liquid flow direction. By providing the second return line 72 and the fourth return valve 721 and the fourth pressure gauge 722 thereon, and cooperating with the precise control of the valve stem device 74, this design can effectively balance the pressure in the coating mechanism, reduce pressure fluctuations, make the system run more smoothly, and can monitor the pressure of the fluid in real time to ensure the safety and stability of the system;

[0034] Furthermore, a liquid inlet pipeline 73 is provided on the second valve cavity 76, and a fifth pressure gauge 731 is installed on the liquid inlet pipeline 73. This design can monitor the pressure of the liquid inlet pipeline 73 in real time, ensuring that the operator can understand and control the liquid inlet pressure at any time.

[0035] like Figure 4 A coating system is shown, the system is a coating mechanism mentioned above, the system is communicated with the coating mechanism, the system includes a control device 1, the control device 1 is communicated with each pressure gauge and each reflux valve in the coating mechanism, the control device 1 is configured to receive and record the pressure data in the pipeline, maintain the pressure balance in the pipeline according to the data, and ensure the coating quality. This arrangement allows the operator to monitor and manage the pressure in the coating mechanism in real time.

[0036] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An intermittent valve, characterized in that: The intermittent valve comprises a valve stem device (2), one end of the valve stem device (2) is connected to a valve body (3), a valve cavity (31) is arranged in the valve body (3), an inlet portion is arranged on the valve body (3), the inlet portion is communicated with the valve cavity (31), the valve stem device (2) comprises a valve core (21), the valve core (21) is located inside the valve cavity (31), the valve core (21) comprises a first end face (211) and a second end face (212), the second end face (212) is close to the inlet portion, the first end face (211) is larger than the second end face (212), and the first end face (211) is configured as a spherical surface, and the valve cavity (31) is configured in a form of gradually expanding from the inlet portion toward the inside of the valve cavity (31).

2. An intermittent valve according to claim 1, characterized in that: The valve stem device (2) comprises a valve stem (22), one end of the valve stem (22) is connected to the valve core (21), and the end of the valve stem (22) away from the valve core (21) is provided with a driving device (4).

3. An intermittent valve according to claim 1, characterized in that: It comprises a reflux pipeline (5), the reflux pipeline (5) being in communication with the valve cavity (31), and a first reflux valve (51) and a first pressure gauge (52) being arranged in sequence on the reflux pipeline (5) along the liquid flow direction.

4. An intermittent valve according to claim 3, characterized in that: The valve cavity (31) is connected to a liquid outlet pipeline (6), and a pressure reducing valve (61) and a second pressure gauge (62) are sequentially arranged on the liquid outlet pipeline (6) along the liquid flow direction.

5. A coating mechanism, characterized in that: It comprises an intermittent valve as described in any one of claims 1 to 4, wherein the coating mechanism comprises a second intermittent valve (7) connected to the intermittent valve, and a third pressure gauge (71) is provided between the second intermittent valve (7) and the intermittent valve.

6. A coating mechanism according to claim 5, characterized in that: The second intermittent valve (7) is provided with a second valve stem device (74), one end of the second valve stem device (74) is connected to a second driving device (75), and the other end of the second valve stem device (74) is connected to a second valve cavity (76).

7. A coating mechanism according to claim 6, characterized in that: The second valve cavity (76) is provided with a second return pipeline (72), and the second return pipeline (72) is provided with a fourth return valve (721) and a fourth pressure gauge (722) in sequence along the liquid flow direction.

8. A coating mechanism according to claim 7, characterized in that: The second valve cavity (76) is provided with a liquid inlet pipeline (73), and the liquid inlet pipeline (73) is provided with a fifth pressure gauge (731).

9. A coating system, characterized in that: The system comprises a coating mechanism as described in any one of claims 5 to 8, and the system is communicatively connected with the coating mechanism.

10. A coating system according to claim 9, characterized in that: The system comprises a control device (1), wherein the control device (1) is in communication connection with each pressure gauge and each return valve in the coating mechanism, and the control device (1) is configured to receive and record pressure data in the pipeline, maintain pressure balance in the pipeline according to the data, and ensure coating quality.

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