Standby power supply system of hydrogen injection fuel cell

Abstract

The utility model discloses a hydrogen injection fuel cell standby power supply system. According to the technical scheme, the hydrogen injection fuel cell standby power supply system is characterized by comprising a gas inlet electromagnetic valve and a fuel cell stack which are connected with hydrogen through a pipe, the gas inlet electromagnetic valve outputs gas to an injection device, and a pressure release valve and a pressure sensor are arranged between the injection device and the fuel cell stack; and a gas-water separator is arranged at the output end of the fuel cell stack and is matched with the injection device for circulation. The injection device is adopted to replace a traditional mode that a proportional valve and a hydrogen pump are combined for circulation, so that efficient operation of the system is maintained, and stability and reliability of the system are enhanced.

Description

Technical Field

[0001] The utility model relates to a hydrogen injection fuel cell backup power supply system. Background Art

[0002] Backup power is a temporary power supply prepared in case of power outage or power failure. Hydrogen fuel cells are the most popular hydrogen energy utilization technology in the market. They use the chemical reaction of hydrogen and oxidant in the battery to directly produce electricity. They have the characteristics of no pollution, energy saving, high efficiency, quietness and safety. They can be used for new cars, power stations, submarines and direct power supply for households.

[0003] The traditional method is to use a proportional valve and a hydrogen pump for circulation. If the hydrogen pressure is insufficient during use, it is easy to cause a decrease in circulation efficiency and low stability. Therefore, a new solution is proposed to solve this problem. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a hydrogen injection fuel cell backup power system, which adopts an injection device to replace the traditional method of combining a proportional valve and a hydrogen pump for circulation, so as to maintain the efficient operation of the system and enhance the stability and reliability of the system.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a hydrogen-injection fuel cell backup power system, including an intake solenoid valve and a fuel cell stack connected to hydrogen through a pipe, the intake solenoid valve outputs to a injection device, a pressure relief valve and a pressure sensor are arranged between the injection device and the fuel cell stack, an air-water separator is arranged at the output end of the fuel cell stack, and the air-water separator cooperates with the injection device for circulation.

[0006] By adopting the above technical solution, the fuel cell system is started, and high-pressure hydrogen passes through the solenoid valve to the inlet of the injector. Under the control of the nozzle valve, hydrogen with appropriate pressure and flow is injected into the injector and output to the anode for reaction. After the unreacted hydrogen at the anode and the water produced by the reaction pass through the gas-water separator, the unreacted hydrogen is mixed with the new hydrogen injected by the nozzle valve in the mixing chamber through the reflux port of the injector and re-enters the anode for reaction. The water produced by the reaction is discharged through the drain valve to achieve a cyclic reaction. The high-pressure gas is injected through the nozzle valve to generate a negative pressure area. The reflux gas enters the mixing chamber from the reflux port under the drive of the negative pressure for mixing, and is ejected through the hydrogen outlet after mixing. The nozzle valve is used to accurately inject hydrogen, and the reflux effect is induced through the injector channel. Even when the power output of the fuel cell stack is low, a stable hydrogen circulation flow rate can be ensured to maintain the efficient operation of the system.

[0007] The utility model is further configured as follows: the spraying device comprises a spraying device, a nozzle valve for controlling the spraying device, a mixing chamber and a reflux port.

[0008] By adopting the above technical solution, high-pressure gas is injected through the nozzle valve to generate a negative pressure area. Driven by the negative pressure, the reflux gas enters the reflux mixing chamber from the injection reflux port and is mixed and then ejected from the hydrogen outlet port together.

[0009] The utility model is further configured as follows: the spray guide is respectively provided with a high-pressure input inlet and a low-pressure output outlet.

[0010] The utility model is further configured that: hydrogen gas is injected through the nozzle valve to generate a negative pressure zone in the mixing chamber.

[0011] The utility model is further configured as follows: an injector is provided at the input end of the nozzle valve.

[0012] By adopting the above technical solution, an injector is arranged in front of the nozzle valve, and the hydrogen pressure and hydrogen flow rate are controlled by controlling the opening of the injector.

[0013] The utility model is further configured as follows: a drain valve is provided at the output end of the gas-water separator.

[0014] By adopting the above technical solution, the gas is output through the fuel cell stack and separated by the gas-water separator, and the water is discharged through the drain valve.

[0015] In summary, the utility model has the following beneficial effects:

[0016] 1. The use of a pilot spray device to realize the hydrogen circulation mechanism significantly improves the reuse efficiency of hydrogen. Compared with the traditional circulation scheme combining a proportional valve and a hydrogen pump, the use of a pilot spray device significantly reduces the necessity of a hydrogen pump, thereby reducing the auxiliary energy consumption of the system and improving the overall operating efficiency;

[0017] 2. The hydrogen-free pump design not only greatly reduces the noise pollution of the system, but also effectively reduces the cost;

[0018] 3. The nozzle valve is used to precisely inject hydrogen, and the ejector channel is used to induce the reflux effect. This ensures a stable hydrogen circulation flow rate even when the fuel cell stack power output is low, thus maintaining the efficient operation of the system. This improves the problem of water flooding that is prone to occur in the stack under low power conditions, avoids the voltage drop of the stack caused by water flooding, thereby extending the service life of the stack, enhancing the stability and reliability of the system, and further improving the overall performance indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the workflow of the utility model.

[0021] In the figure: 1. Intake solenoid valve; 2. High-pressure input inlet; 3. Nozzle valve; 4. Low-pressure output outlet; 5. Reflux port; 6. Gas-water separator; 7. Injector; 8. Fuel cell stack; 9. Hydrogen; 10. Pressure relief valve; 11. Drain valve; 12. Pressure sensor. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The utility model is described in detail below in conjunction with the accompanying drawings.

[0026] A hydrogen injection fuel cell backup power system, such as Figure 1 and Figure 2 As shown, it includes an intake solenoid valve 1 and a fuel cell stack 8 connected to hydrogen 9 through a pipe. The intake solenoid valve 1 outputs to a priming device. A pressure relief valve 10 and a pressure sensor 12 are provided between the priming device and the fuel cell stack 8. An air-water separator 6 is provided at the output end of the fuel cell stack 8. The air-water separator 6 cooperates with the priming device for circulation. The priming device includes a nozzle valve 3, a mixing chamber and a reflux port 5.

[0027] High-pressure gas is injected through the nozzle valve 3 to generate a negative pressure zone. An injector is provided at the input end of the nozzle valve 3. An injector is provided in front of the nozzle valve 3. The pressure and flow rate of hydrogen 9 are controlled by controlling the opening of the injector. A drain valve 11 is provided at the output end of the gas-water separator 6.

[0028] Working principle: When the fuel cell system is started, high-pressure hydrogen 9 passes through the solenoid valve to the inlet of the injector 7. Under the control of the nozzle valve 3, hydrogen 9 of appropriate pressure and flow rate is injected into the injector and output to the anode for reaction. After the unreacted hydrogen 9 at the anode and the water produced by the reaction pass through the gas-water separator 6, the unreacted hydrogen 9 passes through the reflux port 5 of the injector and is mixed with the new hydrogen 9 injected by the nozzle valve 3 in the mixing chamber and re-enters the anode for reaction. The water produced by the reaction is discharged through the drain valve 11 to achieve a cyclic reaction. High-pressure gas is injected through the nozzle valve 3 to generate a negative pressure area. The reflux gas enters the mixing chamber from the reflux port 5 driven by the negative pressure for mixing. After mixing, it is ejected through the hydrogen outlet. The nozzle valve 3 is used to accurately inject hydrogen 9, and the reflux effect is induced through the injector channel. Even when the power output of the fuel cell stack 8 is low, a stable circulation flow of hydrogen 9 can be ensured to maintain the efficient operation of the system.

[0029] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hydrogen injection fuel cell backup power system, characterized in that: The invention comprises an air intake solenoid valve (1) and a fuel cell stack (8) connected to hydrogen (9) through a pipe, wherein the air intake solenoid valve (1) outputs to a priming device, a pressure relief valve (10) and a pressure sensor (12) are arranged between the priming device and the fuel cell stack (8), and an air-water separator (6) is arranged at the output end of the fuel cell stack (8), and the air-water separator (6) cooperates with the priming device to circulate.

2. A hydrogen injection fuel cell backup power system according to claim 1, characterized in that: The spray induction device comprises a spray induction device (7), a nozzle valve (3) for controlling the spray induction device (7), a mixing chamber and a return port (5).

3. A hydrogen injection fuel cell backup power system according to claim 2, characterized in that: The spray inducer (7) is provided with a high-pressure input inlet (2) and a low-pressure output outlet (4) respectively.

4. A hydrogen injection fuel cell backup power system according to claim 2, characterized in that: Hydrogen (9) is injected through the nozzle valve to generate a negative pressure zone in the mixing chamber.

5. A hydrogen injection fuel cell backup power supply system according to claim 2, characterized in that: An injector is provided at the input end of the nozzle valve (3).

6. A hydrogen injection fuel cell backup power system according to claim 1, characterized in that: The output end of the gas-water separator (6) is provided with a drain valve (11).

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