Electric pile air tightness testing device

Abstract

The utility model relates to the field of galvanic pile testing, in particular to a galvanic pile air tightness testing device. The two ends of the air supply path are communicated with the galvanic pile and the air inlet respectively, the galvanic pile is communicated with the exhaust hole, the two ends of the purification water path are communicated with the transparent water tank and the water inlet respectively, the transparent water tank is communicated with the water outlet, and the galvanic pile can be placed in the transparent water tank. Before testing, the air supply path supplies air and ensures that the air pressure is the testing pressure, the water purification path purifies water in the whole system, the galvanic pile is placed in the transparent water tank, and the sealing effect of the galvanic pile is judged according to whether the pure water has bubbles or not in the air supply process, namely the air leakage phenomenon. Compared with the prior art that the water purification path purifies the test water in the transparent water tank into pure water, the pure water test environment can be formed only by using common water without adding pure water, the use cost is greatly reduced, the transparent water tank is convenient for observing bubbles, the detection effect is very obvious, and fault points are relatively directly found.

Description

Technical Field

[0001] The utility model relates to the field of battery stack testing, in particular to a battery stack air tightness testing device. Background Art

[0002] In the current field of fuel cell stack air tightness testing, although traditional test benches can provide accurate test results, their high price makes them prohibitive for many companies. In addition, although the test bench can detect leaks, the process of observing leaks is not intuitive, which brings certain difficulties to operators. On the other hand, although tooling testing is a viable alternative, its connection process is cumbersome and its integration is low. Each test requires adding pure water to the transparent water tank, which not only increases the complexity of the operation but also brings the trouble of frequent water changes. In this case, the utilization rate of pure water is also very low, resulting in a waste of resources.

[0003] The existing technical solutions mainly include the following two:

[0004] 1. Bench testing: While this method provides accurate test results, its high cost makes it unaffordable for many companies. Furthermore, while the bench can detect leaks, the process of observing the leaks is not intuitive, which can cause some difficulties for operators.

[0005] 2. Tool Testing: Tool testing is primarily divided into two types: the soap bubble test and the pure water test. While the soap bubble test can detect leaks, observing the leak point is not intuitive and carries the risk of contamination. The pure water test, on the other hand, requires frequent water changes, resulting in very low water utilization and a waste of resources. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a fuel cell stack air tightness test device to solve the problem of difficulty in fuel cell stack testing.

[0007] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: A fuel cell stack air tightness testing device comprises a shell, a transparent water tank, a fuel cell stack, an air supply path, and a purification water path. An air inlet, an exhaust hole, a water inlet, and a drain are provided on the shell. The two ends of the air supply path are respectively connected to the fuel cell stack and the air inlet, the fuel cell stack is connected to the exhaust hole, the two ends of the purification water path are respectively connected to the transparent water tank and the water inlet, the transparent water tank is connected to the drain, and the fuel cell stack can be placed in the transparent water tank.

[0008] Furthermore, the air supply circuit includes an intake solenoid valve, a thermometer and a first digital pressure gauge which are connected in sequence by pipelines. The intake solenoid valve is connected to the air inlet, the first digital pressure gauge is connected to the fuel cell stack, and an air discharge circuit is provided on the pipeline connecting the intake solenoid valve and the air inlet, and an air discharge solenoid valve is provided on the air discharge circuit.

[0009] Furthermore, a pressure reducing valve and a second digital pressure gauge are provided between the air intake solenoid valve and the air intake port, and the pressure reducing valve and the second digital pressure gauge are both connected and provided on a pipeline connecting the air intake solenoid valve and the air intake port.

[0010] Furthermore, a timer and an exhaust solenoid valve are provided on the pipeline connecting the fuel cell stack and the exhaust hole.

[0011] Furthermore, the purification water circuit includes a water pump, a deionizer and a water inlet solenoid valve which are connected in sequence through pipelines. The water pump is connected to the water inlet, and the water inlet solenoid valve is connected to the transparent water tank.

[0012] Furthermore, it also includes a conductivity meter, a drain solenoid valve and a circulating water circuit. The conductivity meter and the drain solenoid valve are arranged on the pipeline connecting the transparent water tank and the drain outlet. One end of the circulating water circuit is connected to the pipeline connecting the water pump and the water inlet, and the other end of the circulating water circuit is connected to the pipeline connecting the conductivity meter and the drain solenoid valve. A circulating solenoid valve is arranged on the circulating water circuit.

[0013] The utility model provides a battery stack air tightness test device, comprising a shell, a transparent water tank, a battery stack, an air supply path, and a purification water path. The shell is provided with an air inlet, an exhaust hole, a water inlet, and a drain hole. The two ends of the air supply path are respectively connected to the battery stack and the air inlet, the battery stack is connected to the exhaust hole, the two ends of the purification water path are respectively connected to the transparent water tank and the water inlet, the transparent water tank is connected to the drain hole, and the battery stack can be placed in the transparent water tank. In this way, all components are fully integrated inside the shell. Before testing, the air supply path supplies air and ensures that the air pressure is the test pressure. The purification water path purifies the water in the entire system. The battery stack is placed in the transparent water tank. The sealing effect of the battery stack is judged by whether there are bubbles or air leakage in the pure water during the air supply process. Compared with the prior art, the purification water path purifies the test water in the transparent water tank to pure water. No pure water needs to be added, and only ordinary water can be used to form a pure water test environment, which greatly reduces the use cost. In addition, the transparent water tank is convenient for observing bubbles, the detection effect is very obvious, and it is relatively direct to find the fault point. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model fuel cell stack air tightness test device;

[0015] Figure 2 The utility model is a flow chart of a method for testing the gas tightness of a fuel cell stack.

[0016] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0017] 1. Shell, 2. Transparent water tank, 3. Battery stack, 4. Air inlet, 5. Exhaust hole, 6. Water inlet, 7. Drain outlet, 8. Air inlet solenoid valve, 9. Thermometer, 10. First digital pressure gauge, 11. Air release solenoid valve, 12. Pressure reducing valve, 13. Second digital pressure gauge, 14. Timer, 15. Exhaust solenoid valve, 16. Water pump, 17. Deionizer, 18. Water inlet solenoid valve, 19. Conductivity meter, 20. Drain solenoid valve, 21. Circulation solenoid valve. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "center", "inside", "outside", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1As shown, the utility model provides a fuel cell stack air tightness testing device, including a shell 1, a transparent water tank 2, a fuel cell stack 3, an air supply path, and a purification water path. The shell 1 is provided with an air inlet 4, an exhaust hole 5, a water inlet 6 and a drain 7. The two ends of the air supply path are respectively connected to the fuel cell stack 3 and the air inlet 4, the fuel cell stack 3 is connected to the exhaust hole 5, the two ends of the purification water path are respectively connected to the transparent water tank 2 and the water inlet 6, the transparent water tank 2 is connected to the drain 7, and the fuel cell stack 3 can be placed in the transparent water tank 2. In this way, all components are integrated inside the shell 1. Before the test, the air supply circuit supplies air and ensures that the air pressure is the test pressure. The water purification circuit purifies the water in the entire system. The battery stack 3 is placed in the transparent water tank 2. The sealing effect of the battery stack 3 is judged by whether there are bubbles or air leakage in the pure water during the air supply process. Compared with the existing technology, the water purification circuit purifies the test water in the transparent water tank 2 into pure water. There is no need to add pure water, only ordinary water can be used to form a pure water test environment, which greatly reduces the use cost. Moreover, the transparent water tank 2 is convenient for observing bubbles, the detection effect is very obvious, and it is relatively direct to find the fault point.

[0022] The utility model of the stack air tightness testing device, such as Figure 1 As shown, based on the technical solution described above, it can also be: the gas supply circuit includes an intake solenoid valve 8, a thermometer 9 and a first digital pressure gauge 10 which are connected in sequence by pipelines, the intake solenoid valve 8 is connected to the air inlet 4, the first digital pressure gauge 10 is connected to the fuel cell stack 3, and a gas relief circuit is provided on the pipeline connecting the intake solenoid valve 8 and the air inlet 4, and the gas relief solenoid valve 11 is provided on the gas relief circuit. In this way, when supplying gas, after the intake solenoid valve 8, the gas enters the fuel cell stack 3 through the thermometer 9 and the first digital pressure gauge 10. The thermometer 9 can monitor whether the temperature of the gas entering the fuel cell stack 3 meets the requirements, and the first digital pressure gauge 10 displays the real-time pressure value of the fuel cell stack 3. During the gas supply process, if the gas pressure value is greater than the pressure value that the fuel cell stack 3 can withstand, the pressure relief adjustment is performed through the gas relief valve.

[0023] The utility model of the stack air tightness testing device, such as Figure 1As shown, on the basis of the technical solution described above, it can also be: a pressure reducing valve 12 and a second digital pressure gauge 13 are provided between the air intake solenoid valve 8 and the air intake port 4, and the pressure reducing valve 12 and the second digital pressure gauge 13 are both connected and provided on the pipeline connecting the air intake solenoid valve 8 and the air intake port 4. In this way, the pressure reducing valve 12 and the second digital pressure gauge 13 are provided on the pipeline between the air intake solenoid valve 8 and the air intake port 4, and the pressure reducing valve 12 reduces the high-pressure gas in the air intake port 4 according to the set pressure value through the internal adjustment mechanism, ensuring that the pressure of the gas entering the air intake solenoid valve 8 is stable and lower than the original pressure of the air intake port 4; when the intake pressure fluctuates, the pressure reducing valve 12 can automatically adjust its opening to keep the outlet pressure (i.e., the pressure before entering the air intake solenoid valve 8) constant at a preset value, thereby achieving precise control of the gas pressure. The second digital pressure gauge 13 uses an internal pressure sensor to sense and measure the gas pressure at the outlet of the pressure reducing valve 12, i.e., the pressure before the intake solenoid valve 8, in real time. The pressure signal collected by the pressure sensor is converted into an electrical signal, processed by a digital processor, and clearly displayed digitally on the display screen, facilitating real-time monitoring and recording by the operator. The provision of the pressure reducing valve 12 effectively ensures the stability of the gas pressure entering the intake solenoid valve 8, preventing the adverse effects of intake pressure fluctuations on the solenoid valve's performance and improving the stability and reliability of the system. The regulation of the pressure reducing valve 12 prevents damage to the intake solenoid valve 8 or other related equipment due to excessive intake pressure, thereby providing a safety protection measure. The provision of the second digital pressure gauge 13 enables the operator to accurately and in real time monitor the gas pressure before the intake solenoid valve 8, providing strong support for precise control and regulation of the system. In the event of a system malfunction or pressure anomaly, the operator can quickly locate the problem by observing the value displayed on the second digital pressure gauge 13, thereby improving the efficiency of troubleshooting and resolution.

[0024] The utility model of the stack air tightness testing device, such as Figure 1 As shown, based on the technical solution described above, a timer 14 and an exhaust solenoid valve 15 may be provided on the pipeline connecting the fuel cell stack 3 and the exhaust hole 5. In this way, during the leakage test of the fuel cell stack 3, in order to better ensure the accuracy of the test, the fuel cell stack 3 is left to stand for a period of time in a pressure-maintaining environment as much as possible, and the difference in the values before and after the second digital pressure gauge 13 is used to further determine whether there is a leak. This ensures that even if the fuel cell stack 3 only has a slight leak and is not easy to directly observe, it can be easily detected whether there is a leak, thereby ensuring the accuracy of the test.

[0025] The utility model of the stack air tightness testing device, such as Figure 1As shown, based on the technical solution described above, the purification water circuit can also include a water pump 16, a deionizer 17, and a water inlet solenoid valve 18, which are sequentially connected by pipelines. The water pump 16 is connected to the water inlet 6, and the water inlet solenoid valve 18 is connected to the transparent water tank 2. Thus, the use of the deionizer 17 effectively removes ionic impurities in the water, such as mineral ions such as calcium and magnesium, as well as any heavy metal ions. This significantly improves the quality of the water entering the transparent water tank 2 and ensures the purity and accuracy of the water for subsequent use or experiments. The combination of the water pump 16 and the water inlet solenoid valve 18 enables automated control of the water flow. The water pump 16 is responsible for pumping water from the water inlet 6, while the water inlet solenoid valve 18 precisely controls the water flow according to system instructions. This not only improves work efficiency but also reduces the complexity and error rate of manual operation. Because the components of the purification water circuit are relatively independent and easily disassembled, maintenance or component replacement can be performed quickly and easily, reducing maintenance costs and difficulty.

[0026] The utility model of the stack air tightness testing device, such as Figure 1 As shown, based on the technical solution described above, the device may further include a conductivity meter 19, a drain solenoid valve 20, and a circulating water circuit. The conductivity meter 19 and drain solenoid valve 20 are disposed in the pipeline connecting the transparent water tank 2 and the drain outlet 7. One end of the circulating water circuit is connected to the pipeline connecting the water pump 16 and the water inlet 6, and the other end of the circulating water circuit is connected to the pipeline connecting the conductivity meter 19 and the drain solenoid valve 20. The circulating water circuit is also provided with a circulating solenoid valve 21. In this way, the water pump 16 draws water from the water inlet 6 and delivers it to the transparent water tank 2 through the pipeline. This step provides a continuous water supply for the device. When water enters the transparent water tank 2, the conductivity meter 19 begins to operate and monitor the conductivity of the water in the tank. Conductivity is a physical quantity that measures the ion content in an aqueous solution and can reflect the water's purity or the concentration of specific ions. The conductivity meter 19 compares the monitored conductivity data with a preset standard value or threshold value. If the conductivity of the water exceeds or falls below the set range, it means that the water quality does not meet the requirements and needs to be treated. At the same time, the circulating water circuit starts working. The circulating solenoid valve 21 opens, and the water enters the water tank pipeline again through the circulating water circuit. In this way, the water is continuously tested by the conductivity meter 19 during the circulation process until the water quality meets the requirements. Improve the accuracy and timeliness of water quality monitoring: By monitoring the water quality in real time through the conductivity meter 19, water quality problems can be discovered in time and corresponding measures can be taken, avoiding the impact of water quality deterioration on subsequent processes or equipment. Reduce operating costs: Since water quality problems can be discovered and handled in a timely manner, additional expenses such as equipment damage or downtime for maintenance due to unqualified water quality are avoided, thereby reducing operating costs.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fuel cell stack air tightness test device, characterized by: The invention comprises a shell (1), a transparent water tank (2), a battery stack (3), an air supply path, and a purification water path. The shell (1) is provided with an air inlet (4), an exhaust hole (5), a water inlet (6), and a drain (7). The two ends of the air supply path are respectively connected to the battery stack (3) and the air inlet (4). The battery stack (3) is connected to the exhaust hole (5). The two ends of the purification water path are respectively connected to the transparent water tank (2) and the water inlet (6). The transparent water tank (2) is connected to the drain (7). The battery stack (3) can be placed in the transparent water tank (2).

2. The fuel cell stack air tightness testing device according to claim 1, characterized in that: The air supply circuit comprises an air intake solenoid valve (8), a thermometer (9) and a first digital pressure gauge (10) which are connected in sequence through pipelines; the air intake solenoid valve (8) is connected to the air intake port (4); the first digital pressure gauge (10) is connected to the fuel cell stack (3); an air discharge circuit is provided on the pipeline connecting the air intake solenoid valve (8) and the air intake port (4); and an air discharge solenoid valve (11) is provided on the air discharge circuit.

3. The fuel cell stack air tightness testing device according to claim 2, characterized in that: A pressure reducing valve (12) and a second digital pressure gauge (13) are provided between the air intake solenoid valve (8) and the air intake port (4); the pressure reducing valve (12) and the second digital pressure gauge (13) are both connected and provided on a pipeline connecting the air intake solenoid valve (8) and the air intake port (4).

4. The fuel cell stack air tightness testing device according to claim 3, characterized in that: A timer (14) and an exhaust solenoid valve (15) are provided on a pipeline connecting the battery stack (3) and the exhaust hole (5).

5. The fuel cell stack air tightness testing device according to claim 1, characterized in that: The purification water circuit comprises a water pump (16), a deionizer (17) and a water inlet electromagnetic valve (18) which are sequentially connected by pipelines. The water pump (16) is connected to the water inlet (6), and the water inlet electromagnetic valve (18) is connected to the transparent water tank (2).

6. The fuel cell stack air tightness testing device according to claim 1, characterized in that: The device further comprises a conductivity meter (19), a drainage solenoid valve (20) and a circulating water circuit, wherein the conductivity meter (19) and the drainage solenoid valve (20) are arranged on a pipeline connecting the transparent water tank (2) and the drainage port (7), one end of the circulating water circuit is connected to a pipeline connecting a water pump (16) and a water inlet (6), and the other end of the circulating water circuit is connected to a pipeline connecting the conductivity meter (19) and the drainage solenoid valve (20), and a circulating solenoid valve (21) is arranged on the circulating water circuit.

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