Air tightness detection device for vanadium redox flow battery system

Abstract

The utility model relates to an air tightness detection device for a vanadium redox flow battery system, and belongs to the field of vanadium redox flow batteries. The inflation system comprises a three-way valve, an air inlet pipe communicated with a first connector of the three-way valve, an exhaust pipe communicated with a second connector of the three-way valve, a first branch and a second branch, wherein the first branch and the second branch are simultaneously connected to a third connector of the three-way valve in series. The first branch and the second branch have the same structure; the first branch comprises a first gas filling pipe communicated with the vanadium redox flow battery system, a ball valve for controlling the connection and disconnection of the first gas filling pipe, and a pressure sensor for measuring the gas tightness of the system. The air tightness detection device has the effects of improving the air tightness detection efficiency and saving energy consumption.

Description

Technical Field

[0001] The present application relates to the field of vanadium redox flow batteries, and in particular to an airtightness detection device for a vanadium redox flow battery system. Background Art

[0002] All-vanadium liquid flow battery is a redox battery with vanadium as the active material in a circulating liquid state. The electrical energy of vanadium battery is stored in the form of chemical energy in sulfuric acid electrolyte of vanadium ions of different valence states. The electrolyte is pressed into the battery stack by an external pump. Under the action of mechanical power, it circulates in the closed loop of different liquid storage tanks and half-cells. Proton exchange membrane is used as the diaphragm of the battery pack. The electrolyte solution flows parallel to the electrode surface and electrochemical reactions occur. The current is collected and conducted through the double electrode plates, so that the chemical energy stored in the solution is converted into electrical energy. The all-vanadium liquid flow battery energy storage system mainly includes liquid storage tanks, battery stacks, pipelines, etc. for storing electrolyte. The electrolyte circulates in the entire energy storage system, and the sealing requirements of the entire system are extremely high.

[0003] According to the invention patent with publication number CN117782436A, a vanadium battery air tightness detection device in the field of battery detection technology is disclosed, and its detection method is: after the movable tube 6 is connected with the liquid inlet pipe 7 or the liquid outlet pipe 12 of the vanadium battery stack 9, the control console controls the two groups of lifting elements to stop running. At this time, the control console passes gas to the vanadium battery stack 9 through the air pipe 2 for air tightness detection. When the air tightness detection is completed, the control console controls the two groups of lifting elements to run in the opposite direction. At this time, the motor starts to rotate in the opposite direction, and the motor drives the movable tube 6 to rotate in the opposite direction. When the movable tube 6 rotates in the opposite direction, it is separated from the liquid inlet pipe 7 or the liquid outlet pipe 12 of the vanadium battery stack 9, and at the same time, the electric telescopic rod 3 begins to shorten, thereby driving the movable plate 4 to start to move away from the vanadium battery stack 9. At this time, the movable plate 13 is pulled horizontally, and the vanadium battery stack 9 is pulled out of the support frame 1 and taken out through the movable plate 13, and then the next vanadium battery stack 9 to be detected is placed.

[0004] In reality, there are large-volume all-vanadium liquid flow battery energy storage systems that are inflated by air compressors, and it takes a long time to fully charge. If the above technical solution is followed, after testing one and then continuing to test another, it needs to be re-inflated, which is inefficient.

[0005] With respect to the above-mentioned related technologies, the utility model inventor believes that there is a defect of low detection efficiency. Utility Model Content

[0006] In order to improve the detection efficiency,

[0007] The present application provides a gas tightness detection device for a vanadium liquid flow battery system using the following technical solution:

[0008] A gas tightness detection device for a vanadium liquid flow battery system comprises a gas filling system, wherein the gas filling system comprises a three-way valve, an air inlet pipe connected to a first joint of the three-way valve, an exhaust pipe connected to a second joint of the three-way valve, and a first branch and a second branch connected in series to a third joint of the three-way valve; the first branch and the second branch have the same structure; the first branch comprises a first gas filling pipe connected to the vanadium liquid flow battery system, a ball valve for controlling the on-off of the first gas filling pipe, and a pressure sensor for measuring the gas tightness of the system.

[0009] By adopting the above technical solution, gas enters from the air inlet pipe, controls the three-way valve, closes the ball valve on the second branch, and the gas enters the first branch to inflate the first vanadium liquid flow battery system. After the inflation is completed and the detection is completed, the ball valve on the second branch is opened and the three-way valve is closed. A large amount of gas enters the second branch and enters the second vanadium liquid flow battery system. After the air pressure in the two systems is the same, the ball valve in the first branch is closed, the three-way valve is opened, and inflation continues, which saves a lot of inflation time and improves detection efficiency.

[0010] Optionally, it also includes a box for integrating the inflation system, and the three-way valve and the ball valve are installed in the box.

[0011] By adopting the above technical solution, the pipes and components of the inflation system are integrated and stored in the box, which is convenient for transportation and the pipes and components are not easily damaged.

[0012] Optionally, it also includes a paperless recorder for displaying and recording measurement data, and the paperless recorder is installed on the box.

[0013] By adopting the above technical solution, the measurement data is displayed on the paperless recorder, which is convenient for observation and recording.

[0014] Optionally, it also includes a communication module for connecting to a mobile device, and the communication module is connected to the paperless recorder.

[0015] By adopting the above technical solution, the communication module transmits data to the mobile device, and the operator can observe the detection data more conveniently.

[0016] Optionally, it also includes a movable quick connector and several fixed quick connectors installed on the box body, the movable quick connector includes a flange disc detachably connected to the vanadium liquid flow battery system, and the intake pipe, exhaust pipe, first branch and second branch are respectively connected to the fixed quick connector.

[0017] By adopting the above technical solution, the rapid connection between the inflation system and the vanadium liquid flow battery system can be achieved.

[0018] Optionally, a handle for an operator to hold is installed on the box.

[0019] By adopting the above technical solution, it is more convenient to lift the box.

[0020] Optionally, a shock-absorbing block is installed at the bottom of the box.

[0021] By adopting the above technical solution, the risk of box collision can be effectively reduced.

[0022] Optionally, the box includes an openable door and a lock installed on the door.

[0023] By adopting the above technical solution, after the pipelines and parts in the box are damaged, the door can be opened for repair.

[0024] As described above, the present application includes at least one of the following beneficial technical effects:

[0025] A large portion of the gas entering the first system to be tested can enter the second system to be tested, which saves a lot of gas filling time, improves detection efficiency, and saves energy consumption.

[0026] Integrating the pipeline and valve body into the box body makes it easy to move and the inflation system is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 It is a rear view of the overall structure of an embodiment of the present application.

[0029] Figure 3 It is a partial structural diagram of an embodiment of the present application.

[0030] Figure 4 It is an overall schematic diagram of the inflation system.

[0031] Figure 5 It is the overall structural diagram of the quick connection structure.

[0032] Figure 6 yes Figure 5 A partial enlarged view of middle A.

[0033] Explanation of the accompanying drawings: 1. Inflation system; 11. Intake pipe; 12. Exhaust pipe; 13. Three-way valve; 14. Connecting pipe; 15. Second inflation pipe; 16. First inflation pipe; 17. Ball valve; 18. Pressure sensor; 2. Box; 21. Handle; 22. Shock absorber; 23. Door; 24. Lock; 25. Hinge; 3. Paperless recorder; 4. Switch; 5. Communication module; 6. Fixed quick connector; 61. Second air nozzle; 7. Mobile quick connector; 71. Flange disc; 711. Threaded hole; 72. First interface; 73. Air pipe; 74. Second interface; 75. First air nozzle; 76. Nut. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The present application embodiment discloses a gas tightness detection device for a vanadium liquid flow battery system. Figure 1 , Figure 3 and Figure 4 A gas tightness detection device for a vanadium liquid flow battery system includes an inflation system 1, a box 2 for accommodating the inflation system 1, a paperless recorder 3 installed on the box 2, a communication module 5 connected to the paperless recorder 3, four fixed quick connectors 6 installed on the box 2, and a movable quick connector 7 matched with the fixed quick connector 6.

[0036] refer to Figure 1 , Figure 2 The box 2 is in a rectangular shape, with a handle 21 installed on the upper end of the box 2 and four rubber shock-absorbing blocks 22 at the bottom of the box 2. A clearance groove is provided on the front of the box 2, and the paperless recorder 3 is embedded in the clearance groove. The buttons and screen of the paperless recorder 3 are located outside the box 2. The box 2 is welded by five rectangular iron sheets, and the back of the box 2 is open. Two hinges 25 are installed on the side wall of the box 2, and a door 23 for blocking the back opening of the box 2 is installed on the hinge 25. The door 23 is provided with a lock 24 for locking the door 23 and the box 2.

[0037] refer to Figure 3 , Figure 4 The inflation system 1 includes an intake pipe 11, an exhaust pipe 12, a three-way valve 13, a connecting pipe 14, a first branch and a second branch. The first branch includes a first inflation pipe 16, a ball valve 17, and a pressure sensor 18, and the second branch includes a second inflation pipe 15, a ball valve 17, and a pressure sensor 18.

[0038] refer to Figure 1 , Figure 3Two ball valves 17 and one three-way valve 13 are embedded in the front of the box 2, located below the paperless recorder 3. The ball valve 17 is equipped with a switch 4 for controlling the opening or closing of the ball valve 17, and the three-way valve 13 is equipped with a switch 4 for controlling the passage of the three-way valve 13. The three switches 4 are all located outside the box 2.

[0039] refer to Figure 3 , Figure 4 The air inlet pipe 11 is connected to the inlet of the three-way valve 13, the exhaust pipe 12 and the connecting pipe 14 are respectively connected to the two outlets of the three-way valve 13, the first branch and the second branch have the same structure, the first inflation pipe 16 and the second inflation pipe 15 are both connected in series to the end of the connecting pipe 14 away from the three-way valve 13, the ball valve 17 is arranged on the first inflation pipe 16 to control the on-off of the first branch, and the pressure sensor 18 is arranged between the ball valve 17 and the end of the first branch. The inflation system 1 is located in the box 2.

[0040] refer to Figure 3 , Figure 4 Four fixed quick connectors 6 are installed on the box body 2, and the fixed quick connectors 6 include a second air nozzle 61. The inlets of the air inlet pipe 11 and the exhaust pipe 12 are connected to two of the fixed quick connectors 6, and the outlet ends of the first inflation pipe 16 and the second inflation pipe 15 are connected to the other two fixed quick connectors 6.

[0041] refer to Figure 3 , Figure 5 , Figure 6 The mobile quick connector 7 includes a flange disc 71, a first interface 72 fixedly connected to the flange disc 71, a gas pipe 73 sleeved on the first interface 72, and a second interface 74 sleeved on one end of the gas pipe 73 away from the flange disc 71. The second interface 74 is connected to a first gas nozzle 75 matched with the second gas nozzle 61. A nut 76 is screwed on the second interface 74, and the nut 76 is screwed on the fixed quick connector 6. The diameter of the flange disc 71 can be determined according to the pipeline of the vanadium liquid flow battery system to be tested, and a threaded hole 711 for inserting a bolt is opened on the flange disc 71.

[0042] The implementation principle of the air tightness detection device for a vanadium liquid flow battery system in the embodiment of the present application is as follows:

[0043] 1. Connect the air compressor to the air intake pipe 11, and the air enters the three-way valve 13 from the air intake pipe 11. At this time, the gas in the three-way valve 13 can only enter the connecting pipe 14, and the ball valve 17 in the second branch is in a closed state, and the air cannot enter the second branch. The ball valve 17 in the first branch is in a passage state, and the air enters the first branch and enters the first vanadium liquid flow battery system. After the air fills the system, close the ball valve 17 in the first branch, and the pressure sensor 18 detects the system pressure and transmits the data to the paperless recorder 3. The communication module 5 transmits the data to the operator's mobile device.

[0044] 2. The three-way valve 13 is controlled by the switch 4, the air inlet of the connecting pipe 14 is in a closed state, the ball valve 17 in the second branch is a passage, and the air enters the second branch and enters the second vanadium liquid flow battery system. If the air is insufficient, adjust the three-way valve 13, the air inlet pipe 11 is connected to the second branch, and the air enters the second vanadium liquid flow battery system. After it is full, the measurement is completed.

[0045] 3. The inflation system 1 is located inside the box 2. If a fault occurs, the door 23 can be opened to repair and replace parts and pipelines.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gas tightness detection device for a vanadium liquid flow battery system, characterized in that: The invention comprises an inflation system (1), wherein the inflation system (1) comprises a three-way valve (13), an air intake pipe (11) connected to a first joint of the three-way valve (13), an exhaust pipe (12) connected to a second joint of the three-way valve (13), and a first branch and a second branch connected in series to a third joint of the three-way valve (13); the first branch and the second branch have the same structure; the first branch comprises a first inflation pipe (16) connected to a vanadium liquid flow battery system, a ball valve (17) for controlling the opening and closing of the first inflation pipe (16), and a pressure sensor (18) for measuring the air tightness of the system.

2. The air tightness detection device for a vanadium liquid flow battery system according to claim 1, characterized in that: It also includes a box (2) for integrating the inflation system (1), and the three-way valve (13) and the ball valve (17) are installed in the box (2).

3. The airtightness detection device for a vanadium liquid flow battery system according to claim 2, characterized in that: It also includes a paperless recorder (3) for displaying and recording measurement data, and the paperless recorder (3) is installed on the box (2).

4. The airtightness detection device for a vanadium liquid flow battery system according to claim 3, characterized in that: It also includes a communication module (5) for connecting to a mobile device, wherein the communication module (5) is connected to the paperless recorder (3).

5. The airtightness detection device for a vanadium liquid flow battery system according to claim 4, characterized in that: It also comprises a movable quick connector (7) and a plurality of fixed quick connectors (6) mounted on the box body (2); the movable quick connector (7) comprises a flange disc (71) detachably connected to the vanadium liquid flow battery system; the air inlet pipe (11), the exhaust pipe (12), the first branch and the second branch are respectively connected to the fixed quick connector (6).

6. The airtightness detection device for a vanadium liquid flow battery system according to claim 5, characterized in that: The box body (2) is provided with a handle (21) for an operator to hold.

7. The airtightness detection device for a vanadium flow battery system according to claim 6, characterized in that: A shock absorbing block (22) is installed at the bottom of the box body (2).

8. The airtightness detection device for a vanadium flow battery system according to claim 7, characterized in that: The box body (2) comprises an openable door (23) and a lock (24) installed on the door (23).

Images