Fuel cell engine box purging device

Abstract

The utility model discloses a fuel cell engine box body blowing device which comprises a packaging box body, an electric pile, a hydrogen concentration sensor, an air compressor, an intercooler, a humidifier, an air blower, a blowing input pipe, a blowing output pipe, an air path inlet pipe, an air path outlet pipe and an exhaust pipe. One end of the air path inlet pipe is communicated with the air compressor, the other end of the air path inlet pipe sequentially passes through the intercooler and the humidifier and then is communicated with the electric pile, one end of the air path outlet pipe is communicated with the electric pile, and the other end of the air path outlet pipe penetrates out of the packaging box body, passes through the humidifier and is communicated with the air compressor, the exhaust pipe is communicated with the air compressor, and one end of the blowing input pipe is communicated with the air blower. And the other end of the purging output pipe is communicated with the interior of the packaging box body. In the application, when hydrogen-air series leakage and cold-air series leakage occur in the electric pile, hydrogen and the cooling liquid cannot be introduced into the packaging box body again, so that a fuel cell engine cannot be broken down.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a fuel cell engine box purging device. Background Art

[0002] The fuel cell engine stack is encapsulated in a box to achieve IP67 or higher protection. Since hydrogen molecules have strong penetrating power, a small amount of hydrogen will penetrate during the normal operation of the stack. The stack is encapsulated in a sealed box, and the sealed box must be ventilated. When hydrogen leaks from the stack, the volume of hydrogen is quickly diluted by ventilating the box to avoid the explosion range of hydrogen, which is 4.0% to 75.6%, so that the safe operation of the fuel cell engine is guaranteed.

[0003] like Figure 1 In the prior art, when hydrogen and oxygen leakage occurs in the stack, the anode hydrogen penetrates into the air side, and the fuel cell engine is running, the leaked hydrogen enters the humidifier from the air path stack outlet through the throttle TCV2, and the hydrogen penetrates into the three-way joint a through the hollow fiber tube in the humidifier, and the leaked hydrogen is blown into the inside of the box again, and the hydrogen inside the box is detected by the hydrogen and oxygen concentration sensor, and the fuel cell engine will fail and shut down; when cold air leakage occurs in the stack, the coolant leaks to the air side, and the fuel cell engine is started or running, the leaked coolant enters the humidifier from the air path stack outlet through the throttle TCV2, and the coolant penetrates into the three-way joint a through the hollow fiber tube in the humidifier, and the leaked coolant is blown into the box again. Since the bipolar plates of the stack and the box are insulated, but the box is grounded, the coolant is blown into the box and covers the surface of the stack, forming a water film. The conduction between the water film and the box causes the fuel cell engine to shut down due to insulation failure. Utility Model Content

[0004] The utility model aims to provide a fuel cell engine box purging device, so that when a small hydrogen-air leakage or cold air leakage occurs in the fuel cell engine, the fuel cell engine can continue to work without failure shutdown.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A fuel cell engine case purging device comprises a packaging case, a fuel cell stack, a hydrogen concentration sensor, an air compressor, an intercooler, a humidifier, a blower, a purge inlet pipe, a purge output pipe, an air path inlet pipe, an air path outlet pipe, and an exhaust pipe, wherein the fuel cell stack and the hydrogen concentration sensor are both arranged in the packaging case, one end of the air path inlet pipe is connected to the air compressor, and the other end thereof is connected to the fuel cell stack after passing through the intercooler and the humidifier in sequence, one end of the air path outlet pipe is connected to the fuel cell stack, and the other end thereof passes through the packaging case, passes through the humidifier, and is connected to the air compressor, the exhaust pipe is connected to the air compressor, one end of the purge inlet pipe is connected to the blower, and the other end thereof is connected to the inside of the packaging case, and the purge output pipe is connected to the inside of the packaging case.

[0007] Preferably, it also includes an air filter and a first air intake pipe, and the air filter is connected to the air compressor through the first air intake pipe.

[0008] Preferably, it further includes a second air intake pipe, and the air filter is connected to the blower through the second air intake pipe.

[0009] Preferably, the hydrogen concentration sensor is located in the packaging box and at the purge output pipe.

[0010] Preferably, the purge inlet pipe and the purge outlet pipe are correspondingly located at two opposite sides of the packaging box.

[0011] Preferably, a first throttle valve is provided on the air path inlet pipe, and the first throttle valve is located between the humidifier and the fuel cell stack.

[0012] Preferably, a second throttle valve is provided on the air path outlet pipe, and the second throttle valve is located between the humidifier and the fuel cell stack.

[0013] Preferably, a connecting pipe is connected between the humidifier and the exhaust pipe, and a third throttle valve is provided on the connecting pipe.

[0014] Compared with the prior art, the fuel cell engine box purging device of the utility model has the following beneficial effects:

[0015] In the utility model, the packaging box is purged by an independently arranged blower, so that when hydrogen-air leakage or cold-air leakage occurs in the fuel cell stack, hydrogen and coolant will not be reintroduced into the interior of the packaging box through the purge inlet pipe, so it will not cause the fuel cell engine to malfunction. Moreover, the blower of the present application is powered by an external power supply, so when the coolant of the fuel cell stack leaks and causes an insulation failure, the packaging box can be purged by ventilation using an externally powered blower, so that the coolant in the packaging box is dried, thereby solving the insulation failure problem and allowing the engine to operate or start normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the prior art of a fuel cell engine box purge device;

[0017] Figure 2 It is a schematic structural diagram of an embodiment of the utility model.

[0018] In the figure, 1. packaging box; 2. battery stack; 3. hydrogen concentration sensor; 4. air compressor; 5. intercooler; 6. humidifier; 7. blower; 8. purge input pipe; 9. purge output pipe; 10. air path inlet pipe; 11. air path outlet pipe; 12. exhaust pipe; 13. air filter; 14. first air intake pipe; 15. second air intake pipe; 16. first throttle valve; 17. second throttle valve; 18. connecting pipe; 19. third throttle valve. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the present utility model, it should be understood that the wording "comprising" used in the present utility model specification refers to the presence of the features, integers, steps, operations, parts / components and / or assemblies, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, assemblies and / or their groups. It should be understood that when we say that a part / component is "connected" to another part / component, it can be directly connected to the other part / component, or there can be intermediate parts / components. The wording "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0021] like Figure 2As shown, the utility model relates to a fuel cell engine box purge device, including a packaging box 1, a fuel cell stack 2, a hydrogen concentration sensor 3, an air compressor 4, an intercooler 5, a humidifier 6, a blower 7, a purge input pipe 8, a purge output pipe 9, an air path inlet pipe 10, an air path outlet pipe 11, and an exhaust pipe 12. The fuel cell stack 2 and the hydrogen concentration sensor 3 are both arranged in the packaging box 1, one end of the air path inlet pipe 10 is connected to the air compressor 4, and the other end thereof passes through the The intercooler 5 and the humidifier 6 are then connected to the battery stack 2, one end of the air path outlet pipe 11 is connected to the battery stack 2, and the other end thereof passes through the packaging box 1, passes through the humidifier 6, and is connected to the air compressor 4, the exhaust pipe 12 is connected to the air compressor 4, one end of the purge inlet pipe 8 is connected to the blower 7, and the other end thereof is connected to the inside of the packaging box 1, the purge output pipe 9 is connected to the inside of the packaging box 1, and the blower 7 is used to be electrically connected to an external power supply.

[0022] In the utility model, the packaging box 1 is purged by an independently arranged blower 7, so that when hydrogen-air leakage or cold-air leakage occurs in the fuel cell stack 2, hydrogen and coolant will not be reintroduced into the interior of the packaging box 1 through the purge inlet pipe 8, so it will not cause the fuel cell engine to malfunction. Moreover, the blower 7 of the present application is powered by an external power supply, so when the coolant of the fuel cell stack 2 leaks and causes an insulation failure, the packaging box 1 can be ventilated and purged by the externally powered blower 7, so that the coolant in the packaging box 1 is dried, thereby solving the insulation failure problem and allowing the engine to operate or start normally.

[0023] In this embodiment, the fuel cell engine box purging device further includes an air filter 13 and a first air intake pipe 14 , and the air filter 13 is connected to the air compressor 4 through the first air intake pipe 14 .

[0024] The air filter 13 is provided to filter the gas entering the air compressor 4, thereby preventing dust and impurities from entering and affecting the normal operation of the equipment.

[0025] Preferably, the fuel cell engine box purging device further includes a second air intake pipe 15 , and the air filter 13 is connected to the blower 7 via the second air intake pipe 15 .

[0026] The blower 7 is connected to the air filter 13 via the second air inlet pipe 15, thereby preventing dust and impurities from entering the packaging box 1, so that the packaging box 1 can ensure the protection requirements of IP67.

[0027] In this embodiment, the hydrogen concentration sensor 3 is located in the packaging box 1 and at the purge output pipe 9 .

[0028] During the purging operation, the gas in the packaging box 1 will be discharged to the outside of the packaging box 1 along the purging output pipe 9 , so that the hydrogen concentration sensor 3 is arranged at the purging output pipe 9 to accurately measure the hydrogen concentration in the packaging box 1 .

[0029] In this embodiment, the purge inlet pipe 8 and the purge outlet pipe 9 are correspondingly located at two opposite sides of the packaging box 1 , thereby forming convection to make the gas flow in and out more smoothly, thereby accelerating the purge work of the packaging box 1 .

[0030] In this embodiment, a first throttle valve 16 is provided on the air path inlet pipe 10 , and the first throttle valve 16 is located between the humidifier 6 and the fuel cell stack 2 to control the opening and closing of the air path inlet pipe 10 .

[0031] In this embodiment, a second throttle valve 17 is provided on the air outlet pipe 11 , and the second throttle valve 17 is located between the humidifier 6 and the fuel cell stack 2 to control the opening and closing of the air outlet pipe 11 .

[0032] In this embodiment, a connecting pipe 18 is connected between the humidifier 6 and the exhaust pipe 12 , and a third throttle valve 19 is provided on the connecting pipe 18 to control the opening and closing of the connecting pipe 18 .

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A fuel cell engine box purging device, characterized in that: It includes a packaging box, a fuel cell stack, a hydrogen concentration sensor, an air compressor, an intercooler, a humidifier, a blower, a purge inlet pipe, a purge output pipe, an air path inlet pipe, an air path outlet pipe, and an exhaust pipe. The fuel cell stack and the hydrogen concentration sensor are both arranged in the packaging box. One end of the air path inlet pipe is connected to the air compressor, and the other end thereof is connected to the fuel cell stack after passing through the intercooler and the humidifier in sequence. One end of the air path outlet pipe is connected to the fuel cell stack, and the other end thereof passes through the packaging box, passes through the humidifier, and is connected to the air compressor. The exhaust pipe is connected to the air compressor. One end of the purge inlet pipe is connected to the blower, and the other end thereof is connected to the inside of the packaging box. The purge output pipe is connected to the inside of the packaging box.

2. The fuel cell engine box purging device according to claim 1, characterized in that: It also includes an air filter and a first air intake pipe, and the air filter is connected to the air compressor through the first air intake pipe.

3. The fuel cell engine box purging device according to claim 2, characterized in that: The utility model further comprises a second air intake pipe, and the air filter is connected with the blower through the second air intake pipe.

4. The fuel cell engine box purging device according to claim 1, characterized in that: The hydrogen concentration sensor is located in the packaging box and at the purge output pipe.

5. The fuel cell engine box purging device according to claim 1, characterized in that: The purge input pipe and the purge output pipe are correspondingly located at two opposite sides of the packaging box.

6. The fuel cell engine box purging device according to claim 1, characterized in that: The air path inlet pipe is provided with a first throttle valve, and the first throttle valve is located between the humidifier and the fuel cell stack.

7. The fuel cell engine box purging device according to claim 1, characterized in that: The air path outlet pipe is provided with a second throttle valve, and the second throttle valve is located between the humidifier and the fuel cell stack.

8. The fuel cell engine box purging device according to claim 1, characterized in that: A connecting pipe is connected between the humidifier and the exhaust pipe, and a third throttle valve is arranged on the connecting pipe.

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