Fuel cell purging system

Abstract

The utility model relates to the technical field of fuel cells, and discloses a fuel cell purging system, which comprises a packaging box body provided with a first inlet and a first outlet, and a cell stack arranged in the packaging box body and provided with a second inlet and a second outlet; the humidifier is provided with a third inlet, a third outlet, a fourth inlet and a fourth outlet, the third inlet is communicated with the second outlet, and the third outlet is communicated with the second inlet; the intercooler is provided with a fifth inlet and a fifth outlet, and the fifth outlet communicates with the fourth inlet; the air compressor is provided with a sixth inlet, a sixth outlet, a seventh inlet and a seventh outlet, the sixth inlet is communicated with the fourth outlet, the sixth outlet is communicated with the fifth inlet, the seventh inlet is connected with an air inlet pipe, and the seventh outlet is connected with an exhaust pipe; and the three-way valve is provided with an eighth inlet, an eighth outlet and a ninth outlet. The purging system disclosed by the utility model can prevent hydrogen from gathering in the packaging box body, so that the battery stack keeps insulativity, and the operation safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell purge system. Background Art

[0002] The fuel cell stack in a fuel cell system cannot be absolutely sealed during operation, so hydrogen will overflow into the tank. To prevent hydrogen accumulation, a tank purge line is added to dilute the hydrogen concentration. However, when the fuel cell is shut down for an extended period, a pressure differential is generated in its high-level water tank, causing the pressure in the cooling cavity of the stack to exceed that in the air cavity. This causes antifreeze to leak into the air cavity and then into the tank through the purge line. High-humidity coolant entering the tank reduces the insulation performance of the stack. Furthermore, hydrogen leaking from the stack enters the air cavity and ultimately enters the tank through the purge line, exacerbating hydrogen accumulation in the tank and affecting safety. Utility Model Content

[0003] The utility model aims to provide a fuel cell purge system, which can avoid hydrogen accumulation inside the packaging box, keep the battery stack insulated, and ensure safe operation.

[0004] In order to achieve the above objectives, the present invention provides a fuel cell purge system, comprising:

[0005] A packaging box is provided with a first inlet and a first outlet, a battery stack is provided in the packaging box, and the battery stack is provided with a second inlet and a second outlet;

[0006] a humidifier having a third inlet, a third outlet, a fourth inlet, and a fourth outlet, wherein the third inlet is connected to the second outlet, and the third outlet is connected to the second inlet;

[0007] an intercooler, provided with a fifth inlet and a fifth outlet, wherein the fifth outlet is in communication with the fourth inlet;

[0008] an air compressor having a sixth inlet, a sixth outlet, a seventh inlet, and a seventh outlet, wherein the sixth inlet is connected to the fourth outlet, the sixth outlet is connected to the fifth inlet, the seventh inlet is connected to an air intake pipe, and the seventh outlet is connected to an exhaust pipe; and

[0009] a three-way valve having an eighth inlet, an eighth outlet, and a ninth outlet, wherein the eighth inlet is connected to the fifth outlet, and the eighth outlet is connected to the first inlet;

[0010] Wherein, the first outlet is communicated with the exhaust pipe.

[0011] In some embodiments, the three-way valve and the intercooler are respectively mounted on the outer wall of the packaging box.

[0012] In some embodiments, the system further includes a first throttle valve installed in a pipeline between the third inlet and the second outlet.

[0013] In some embodiments, the air conditioner further includes a second throttle valve installed in the pipeline between the third outlet and the second inlet.

[0014] In some embodiments, the eighth outlet is arranged vertically upward.

[0015] In some embodiments, the ninth outlet is oriented in the opposite direction to the eighth inlet.

[0016] In some embodiments, the ninth outlet is in communication with the exhaust pipe.

[0017] In some embodiments, the packaging box is an insulating box.

[0018] In some embodiments, the sidewalls of the packaging box have reinforcing ribs.

[0019] In some embodiments, the eighth inlet, the eighth outlet, and the ninth outlet are all equipped with quick connectors.

[0020] The utility model provides a fuel cell purge system, which has the following advantages compared with the prior art:

[0021] The three-way valve is provided with an eighth inlet, an eighth outlet and a ninth outlet. The eighth inlet is connected to the fifth outlet, and the eighth outlet is connected to the first inlet. By adjusting the three-way valve to close the eighth outlet and open the ninth outlet, the antifreeze leaked from the battery stack and the hydrogen leaked from the inside can be directly discharged, which can avoid the accumulation of hydrogen inside the packaging box and keep the battery stack insulating. In addition, opening the eighth outlet and closing the ninth outlet can perform a purge operation on the inside of the packaging box, which can reduce the hydrogen concentration and ensure safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a fuel cell purge system provided in an embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the packaging box installation structure of the fuel cell purge system provided by an embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of the bottom structure of the packaging box of the fuel cell purge system provided by an embodiment of the present utility model.

[0025] In the figure: 1. Packaging box; 11. First inlet; 12. First outlet; 13. Reinforcing rib; 2. Humidifier; 21. Third inlet; 22. Third outlet; 23. Fourth inlet; 24. Fourth outlet; 3. Intercooler; 31. Fifth inlet; 32. Fifth outlet; 4. Air compressor; 41. Sixth inlet; 42. Sixth outlet; 43. Seventh inlet; 44. Seventh outlet; 5. Three-way valve; 51. Eighth inlet; 52. Eighth outlet; 53. Ninth outlet; 6. Battery stack; 61. Second inlet; 62. Second outlet; 7. Inlet pipe; 8. Exhaust pipe; 9. First throttle valve; 10. Second throttle valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0027] It should be understood that in the description of this application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. That is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0028] like Figure 1-3 As shown, the fuel cell purge system according to an embodiment of the present utility model includes a packaging box 1 , a humidifier 2 , an intercooler 3 , an air compressor 4 and a three-way valve 5 .

[0029] The packaging box 1 is provided with a first inlet 11 and a first outlet 12. A battery stack 6 is provided inside the packaging box 1. The battery stack 6 is provided with a second inlet 61 and a second outlet 62. Compressed air can be circulated to the battery stack 6 through the second inlet 61 and the second outlet 62.

[0030] The humidifier 2 is provided with a third inlet 21, a third outlet 22, a fourth inlet 23 and a fourth outlet 24. The third inlet 21 is connected to the second outlet 62, and the third outlet 22 is connected to the second inlet 61. The humidifier 2 is used to increase the humidity of the air input to the battery stack 6.

[0031] The intercooler 3 is provided with a fifth inlet 31 and a fifth outlet 32. The fifth outlet 32 ​​is communicated with the fourth inlet 23. The intercooler 3 is used to reduce the temperature of the air input by the air compressor 4.

[0032] The air compressor 4 is provided with a sixth inlet 41, a sixth outlet 42, a seventh inlet 43, and a seventh outlet 44. The sixth inlet 41 is connected to the fourth outlet 24, the sixth outlet 42 is connected to the fifth inlet 31, the seventh inlet 43 is connected to the air intake pipe 7, and the seventh outlet 44 is connected to the exhaust pipe 8. The air compressor 4 is used to output compressed air.

[0033] The three-way valve 5 is provided with an eighth inlet 51, an eighth outlet 52 and a ninth outlet 53. The eighth inlet 51 is communicated with the fifth outlet 32, and the eighth outlet 52 is communicated with the first inlet 11. The first outlet 12 is communicated with the exhaust pipe 8.

[0034] Based on the above-described structural arrangement, when the fuel cell is not used for an extended period, both the eighth and ninth outlets 52, 53 of the three-way valve 5 are closed. When the fuel cell is restarted, the ninth outlet 53 is first opened to discharge any leaked antifreeze and hydrogen. Once this discharge is complete, the eighth outlet 52 is opened and the ninth outlet 53 is closed, allowing compressed air cooled by the intercooler 3 to flow into the interior of the packaging case 1. This purge prevents any leaked antifreeze and hydrogen from entering the packaging case 1 during extended periods of inactivity, thereby enhancing the safety and reliability of the fuel cell.

[0035] like Figure 2 As shown, in one embodiment, the three-way valve 5 and the intercooler 3 are respectively installed on the outer wall of the packaging box 1. Specifically, they are installed at the bottom of the packaging box 1 to keep the structure compact.

[0036] In one embodiment, the fuel cell purge system further includes a first throttle valve 9 installed in the pipeline between the third inlet 21 and the second outlet 62. The first throttle valve 9 is used to adjust the flow rate of air input from the humidifier 2 to the fuel cell stack 6.

[0037] In one embodiment, the fuel cell purge system further includes a second throttle valve 10, which is installed in the pipeline between the third outlet 22 and the second inlet 61. The second throttle valve 10 is used to adjust the flow rate of air discharged from the fuel cell stack 6 to the humidifier 2.

[0038] In one embodiment, the eighth outlet 52 is arranged vertically upwards, so that during the purge process, the air can discharge the residual hydrogen in the packaging box 1 from bottom to top, which can make the hydrogen discharge more thorough.

[0039] In one embodiment, the ninth outlet 53 is oriented in the opposite direction to the eighth inlet 51. Furthermore, the ninth outlet 53 and the eighth inlet 51 are located on the same straight line, so that leaked antifreeze and hydrogen can be discharged smoothly.

[0040] Optionally, the ninth outlet 53 is communicated with the exhaust pipe 8 so that the leaked antifreeze liquid and hydrogen are finally discharged through the exhaust pipe 8 to ensure safe operation.

[0041] Optionally, the packaging box 1 is an insulating box to ensure safe operation.

[0042] In one embodiment, the sidewalls of the packaging box 1 have reinforcing ribs 13 for improving the structural strength of the packaging box 1 .

[0043] In one embodiment, the eighth inlet 51 , the eighth outlet 52 , and the ninth outlet 53 are all equipped with quick connectors to facilitate installation and removal of the three-way valve 5 .

[0044] 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 replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A fuel cell purge system, characterized in that: include: A packaging box is provided with a first inlet and a first outlet, a battery stack is provided in the packaging box, and the battery stack is provided with a second inlet and a second outlet; a humidifier having a third inlet, a third outlet, a fourth inlet, and a fourth outlet, wherein the third inlet is connected to the second outlet, and the third outlet is connected to the second inlet; an intercooler, provided with a fifth inlet and a fifth outlet, wherein the fifth outlet is in communication with the fourth inlet; an air compressor having a sixth inlet, a sixth outlet, a seventh inlet, and a seventh outlet, wherein the sixth inlet is connected to the fourth outlet, the sixth outlet is connected to the fifth inlet, the seventh inlet is connected to an air intake pipe, and the seventh outlet is connected to an exhaust pipe; and a three-way valve having an eighth inlet, an eighth outlet, and a ninth outlet, wherein the eighth inlet is connected to the fifth outlet, and the eighth outlet is connected to the first inlet; Wherein, the first outlet is communicated with the exhaust pipe.

2. The fuel cell purge system according to claim 1, characterized in that: The three-way valve and the intercooler are respectively installed on the outer wall of the packaging box.

3. The fuel cell purge system according to claim 1, characterized in that: The vehicle further comprises a first throttle valve installed in a pipeline between the third inlet and the second outlet.

4. The fuel cell purge system according to claim 1, characterized in that: The vehicle further comprises a second throttle valve installed in a pipeline between the third outlet and the second inlet.

5. The fuel cell purge system according to claim 1, characterized in that: The eighth outlet is arranged vertically upward.

6. The fuel cell purge system according to claim 1, characterized in that: The ninth outlet is oriented in the opposite direction to the eighth inlet.

7. The fuel cell purge system according to claim 1, characterized in that: The ninth outlet is communicated with the exhaust pipe.

8. The fuel cell purge system according to claim 1, characterized in that: The packaging box is an insulating box.

9. The fuel cell purge system according to claim 8, characterized in that: The side wall of the packaging box has reinforcing ribs.

10. The fuel cell purge system according to claim 1, wherein: The eighth inlet, the eighth outlet and the ninth outlet are all equipped with quick connectors.

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