A fuel cell test stand circulating water pressure control system
Patent Information
- Application Number
- CN202522523849.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-11-27
AI Technical Summary
[0002]现有技术中，燃料电池在测试过程中，需要通过循环水系统维持稳定的工作温度，而循环水的压力是影响冷却效果和测试准确性的重要参数，现有循环水压力控制系统多采用连续调节阀门开度的方式控制压力，存在响应滞后、控制精度低的问题，难以满足燃料电池测试中对压力快速动态调节的需求，因此，针对上述问题提出一种燃料电池测试台循环水压力控制系统
[0011] This invention provides a circulating water pressure control system for a fuel cell test bench. By using pulse-type switching control of the intake and exhaust solenoid valves, the system offers a faster response speed compared to traditional continuous adjustment methods, enabling rapid pressure increase and decrease. Furthermore, by adjusting the pulse width and frequency, the system can flexibly control the amount of supplementary or exhaust gas based on the pressure difference, improving pressure control accuracy. In addition, the system has a simple structure, requiring only two solenoid valves to achieve pressure control, thus reducing equipment costs and maintenance difficulty.
Smart Images
Figure CN224720421U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fuel cell testing technology, specifically a circulating water pressure control system for a fuel cell test bench. Background Technology
[0002] In existing technologies, fuel cells need to maintain a stable operating temperature through a circulating water system during testing. The pressure of the circulating water is an important parameter affecting the cooling effect and the accuracy of the test. Existing circulating water pressure control systems mostly use continuous adjustment of valve opening to control the pressure, which has problems such as response lag and low control accuracy. It is difficult to meet the requirements of rapid dynamic pressure adjustment in fuel cell testing. Therefore, a circulating water pressure control system for fuel cell test bench is proposed to address the above problems. Utility Model Content
[0003] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a circulating water pressure control system for a fuel cell test bench.
[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: The circulating water pressure control system of the fuel cell test bench of this utility model includes a circulating water tank, an air inlet manual valve, an air inlet solenoid valve, an exhaust solenoid valve, a circulating water system, a circulating water return pressure sensor, a circulating water inlet pressure sensor, a circulating water flow meter, a heating rod, a circulating water tank temperature sensor, a circulating water pump, a circulating water tank drain valve, a secondary cooling water shut-off valve, a secondary cooling water proportional valve, a plate heat exchanger, a circulating water circuit, a pressure detection module, and a control module. The pressure detection module is set on the circulating water circuit and is used to detect the pressure value in the circulating water circuit in real time and transmit the detected pressure signal to the control module.
[0005] Preferably, the circulating water circuit is connected to the cooling water circuit of the fuel cell test bench to provide circulating cooling water for fuel cell testing.
[0006] Preferably, one end of the intake solenoid valve is connected to a high-pressure gas source, and the other end is connected to a circulating water circuit, for injecting gas into the circulating water circuit to increase the circuit pressure. The high-pressure gas source is an inert gas source to avoid chemical reactions between the gas and the circulating water or fuel cell.
[0007] Preferably, the exhaust solenoid valve is installed on the circulating water circuit to discharge gas in the circulating water circuit to reduce the circuit pressure.
[0008] Preferably, the control module is electrically connected to the pressure detection module, the intake solenoid valve, and the exhaust solenoid valve, respectively. The control module has a preset target pressure value. When the actual pressure value detected by the pressure detection module is lower than the target pressure value, the control module controls the intake solenoid valve to open in a pulse form to replenish air into the circulating water circuit. When the actual pressure value is higher than the target pressure value, the control module controls the exhaust solenoid valve to open in a pulse form to discharge the gas in the circuit. When the actual pressure value is the same as the target pressure value, the control module controls the intake and exhaust solenoid valves to close. The pulse form opening includes pulse width and pulse frequency. The control module can adjust the pulse width or pulse frequency of the intake or exhaust solenoid valve according to the difference between the actual pressure value and the target pressure value. The larger the difference, the larger the pulse width or the higher the pulse frequency; the smaller the difference, the smaller the pulse width or the lower the pulse frequency.
[0009] Preferably, it also includes a filtration module, which is disposed between the intake solenoid valve and the high-pressure air source, and is used to filter and purify the gas entering the circulating water circuit.
[0010] The beneficial effects of this utility model are:
[0011] This invention provides a circulating water pressure control system for a fuel cell test bench. By using pulse-type switching control of the intake and exhaust solenoid valves, the system offers a faster response speed compared to traditional continuous adjustment methods, enabling rapid pressure increase and decrease. Furthermore, by adjusting the pulse width and frequency, the system can flexibly control the amount of supplementary or exhaust gas based on the pressure difference, improving pressure control accuracy. In addition, the system has a simple structure, requiring only two solenoid valves to achieve pressure control, thus reducing equipment costs and maintenance difficulty. Attached Figure Description
[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings:
[0013] Figure 1 This is a perspective view of the present invention.
[0014] Legend:
[0015] 1. Circulating water tank; 2. Inlet manual valve; 3. Inlet solenoid valve; 4. Exhaust solenoid valve; 5. Circulating water system; 6. Circulating water return pressure sensor; 7. Circulating water inlet pressure sensor; 8. Circulating water flow meter; 9. Heating rod; 10. Circulating water tank temperature sensor; 11. Circulating water pump; 12. Circulating water tank drain valve; 13. Secondary cooling water shut-off valve; 14. Secondary cooling water proportional valve; 15. Plate heat exchanger. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0017] Specific implementation examples are given below.
[0018] Please see Figure 1 This utility model provides a circulating water pressure control system for a fuel cell test bench, including a circulating water tank 1, an intake hand valve 2, an intake solenoid valve 3, an exhaust solenoid valve 4, a circulating water system 5, a circulating water return pressure sensor 6, a circulating water inlet pressure sensor 7, a circulating water flow meter 8, a heating rod 9, a circulating water tank temperature sensor 10, a circulating water pump 11, a circulating water tank drain valve 12, a secondary cooling water shut-off valve 13, a secondary cooling water proportional valve 14, a plate heat exchanger 15, a circulating water circuit, a pressure detection module, and a control module. The pressure detection module is installed on the circulating water circuit to detect the pressure value in the circulating water circuit in real time and transmit the detected pressure signal to the control module.
[0019] Specifically, one end of the intake solenoid valve 3 is connected to a high-pressure gas source, and the other end is connected to the circulating water circuit. It is used to inject gas into the circulating water circuit to increase the circuit pressure. The high-pressure gas source is an inert gas source to avoid chemical reactions between the gas and the circulating water or fuel cell.
[0020] Furthermore, the control module is electrically connected to the pressure detection module, the intake solenoid valve 3, and the exhaust solenoid valve 4, respectively. The control module has a preset target pressure value. When the actual pressure value detected by the pressure detection module is lower than the target pressure value, the control module controls the intake solenoid valve 3 to open in a pulse form to replenish air into the circulating water circuit. When the actual pressure value is higher than the target pressure value, the control module controls the exhaust solenoid valve 4 to open in a pulse form to discharge the gas in the circuit. When the actual pressure value is the same as the target pressure value, the control module controls the intake solenoid valve 3 and the exhaust solenoid valve 4 to close. The pulse form of opening includes pulse width and pulse frequency. The control module can adjust the pulse width or pulse frequency of the intake solenoid valve 3 or the exhaust solenoid valve 4 according to the difference between the actual pressure value and the target pressure value. The larger the difference, the larger the pulse width or the higher the pulse frequency; the smaller the difference, the smaller the pulse width or the lower the pulse frequency.
[0021] It should be added that a filter module is also included. The filter module is located between the intake solenoid valve 3 and the high-pressure air source, and is used to filter and purify the gas entering the circulating water circuit.
[0022] Furthermore, the circulating water loop is connected to the cooling water circuit of the fuel cell test bench to provide circulating cooling water for fuel cell testing.
[0023] It should be noted that the exhaust solenoid valve 4 is installed on the circulating water circuit and is used to discharge the gas in the circulating water circuit to reduce the circuit pressure.
[0024] Working Principle: As shown in the figure, the circulating water loop is connected to the cooling water loop of the fuel cell test bench, providing circulating cooling water to the test bench. The pressure detection module is installed on the pipe of the circulating water inlet, which detects the pressure in the loop in real time and sends the signal to the control module. One end of the intake solenoid valve 3 is connected to a high-pressure gas source (such as a nitrogen source), and the other end is connected to the circulating water tank 1. The exhaust solenoid valve 4 is installed on the top of the circulating water tank 1. The control module presets a target pressure value. When the pressure detection module detects that the actual pressure is lower than the target value, the control module controls the intake solenoid valve 3 to open in a pulse form (such as a pulse width of 50ms and a frequency of 10Hz) to replenish gas into the loop and increase the pressure. When the actual pressure is higher than the target value, the control module controls the exhaust solenoid valve 4 to open in a pulse form to discharge gas and decrease the pressure. When the pressure reaches the target value, both solenoid valves close. If the difference between the actual pressure and the target value is large, the pulse width and frequency can be increased to speed up the pressure regulation. When the difference is small, the pulse width and frequency can be reduced to avoid pressure fluctuations.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A circulating water pressure control system for a fuel cell test bench, comprising a circulating water tank (1), an inlet hand valve (2), an inlet solenoid valve (3), an exhaust solenoid valve (4), a circulating water system (5), a circulating water return pressure sensor (6), a circulating water inlet pressure sensor (7), a circulating water flow meter (8), a heating rod (9), a circulating water tank temperature sensor (10), a circulating water pump (11), a circulating water tank drain valve (12), a secondary cooling water shut-off valve (13), a secondary cooling water proportional valve (14), a plate heat exchanger (15), a circulating water circuit, a pressure detection module, and a control module, characterized in that: The pressure detection module is installed on the circulating water loop to detect the pressure value in the circulating water loop in real time and transmit the detected pressure signal to the control module.
2. The circulating water pressure control system for a fuel cell test bench according to claim 1, characterized in that: The circulating water circuit is connected to the cooling water circuit of the fuel cell test bench and is used to provide circulating cooling water for fuel cell testing.
3. The circulating water pressure control system for a fuel cell test bench according to claim 2, characterized in that: One end of the intake solenoid valve (3) is connected to a high-pressure gas source, and the other end is connected to a circulating water circuit. It is used to inject gas into the circulating water circuit to increase the circuit pressure. The high-pressure gas source is an inert gas source to avoid chemical reaction between the gas and the circulating water or fuel cell.
4. The circulating water pressure control system for a fuel cell test bench according to claim 3, characterized in that: The exhaust solenoid valve (4) is installed on the circulating water circuit and is used to discharge the gas in the circulating water circuit to reduce the circuit pressure.
5. The circulating water pressure control system for a fuel cell test bench according to claim 4, characterized in that: The control module is electrically connected to the pressure detection module, the intake solenoid valve (3), and the exhaust solenoid valve (4). The control module has a preset target pressure value. When the actual pressure value detected by the pressure detection module is lower than the target pressure value, the control module controls the intake solenoid valve (3) to open in a pulse form to replenish air into the circulating water circuit. When the actual pressure value is higher than the target pressure value, the control module controls the exhaust solenoid valve (4) to open in a pulse form to discharge the gas in the circuit. When the actual pressure value is consistent with the target pressure value, the control module controls the intake solenoid valve (3) and the exhaust solenoid valve (4) to close. The pulse form of opening includes pulse width and pulse frequency. The control module can adjust the pulse width or pulse frequency of the intake solenoid valve (3) or the exhaust solenoid valve (4) according to the difference between the actual pressure value and the target pressure value. The larger the difference, the larger the pulse width or the higher the pulse frequency. The smaller the difference, the smaller the pulse width or the lower the pulse frequency.
6. The circulating water pressure control system for a fuel cell test bench according to claim 5, characterized in that: It also includes a filter module, which is set between the intake solenoid valve (3) and the high-pressure gas source to filter and purify the gas entering the circulating water circuit.