Fuel supply system for a fuel cell

Abstract

The application discloses a fuel supply system of a fuel cell, which comprises a liquid fuel bottle, a pump pool, a supply pipeline and a pressurizing pipeline. The liquid fuel bottle is provided with a liquid outlet and a pressurized gas phase outlet. The pump pool is provided with a pressurizing pump inside. The inlet of the pump pool is communicated with the liquid outlet. The supply pipeline is communicated with the pump outlet of the pressurizing pump and the other end is communicated with the fuel inlet of the fuel cell. The pressurizing pipeline is communicated with the pump outlet at one end and the pressurized gas phase outlet at the other end. The pressure of the liquid fuel bottle is less than the critical pressure of the liquid fuel. On one hand, the air supply pressure can meet the use requirement of the fuel cell. On the other hand, the pressure and temperature in the liquid fuel bottle can not exceed the critical value, the fuel in a supercritical state is avoided, the air supply pressure and the pressure adjustment difficulty of the liquid fuel bottle are reduced, and the internal pressure adjustment of the liquid fuel bottle is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a fuel supply system of a fuel cell. BACKGROUND

[0002] With the popularization and promotion of new energy concepts, the application prospect of fuel cells using clean energy is extensive.

[0003] In the prior art, fuel of a fuel cell is supplied through a fuel supply system, and the fuel supply system generally uses a gaseous fuel bottle to store fuel. The fuel in the fuel bottle has low density, large mass and large volume, which can cause poor endurance of the fuel cell using the fuel supply system.

[0004] Furthermore, in order to improve the endurance, a liquid fuel bottle can be used to store fuel. Although the endurance can be improved, if the pressure in the liquid fuel bottle is lower than the critical pressure of the fuel, the existing liquid fuel bottle is difficult to meet the fuel supply pressure requirement of the fuel cell; if the pressure in the liquid fuel bottle is greater than the critical pressure of the fuel, supercritical state fuel can be generated in the fuel supply vaporization process, which can cause difficulty in regulating the gas supply pressure. SUMMARY

[0005] The present application aims to solve at least one of the technical problems in the prior art. To this end, one object of the present application is to provide a fuel supply system of a fuel cell, which can avoid the fuel in the liquid fuel bottle from entering a supercritical state and meet the gas supply requirement.

[0006] The fuel supply system of the fuel cell according to the embodiments of the present application comprises: a liquid fuel bottle having a liquid outlet and a pressurized gas phase outlet; a pump pool having a pressurized pump arranged therein, an inlet of the pump pool being in communication with the liquid outlet; a supply pipeline in communication with a pump outlet of the pressurized pump at one end and in communication with a fuel inlet of the fuel cell at the other end; and a pressurized pipeline in communication with the pump outlet at one end and in communication with the pressurized gas phase outlet at the other end, wherein the pressure of the liquid fuel bottle is less than the critical pressure of the liquid fuel.

[0007] The fuel supply system of the fuel cell according to the embodiments of the present application can ensure that the gas supply pressure meets the use requirement of the fuel cell by arranging a pump pool and making the pressure of the liquid fuel bottle less than the critical pressure of the liquid fuel. On the one hand, the pressure of the liquid fuel bottle can be adjusted to meet the use requirement of the fuel cell. On the other hand, the pressure and temperature of the liquid fuel bottle can be prevented from exceeding the critical value to generate supercritical state fuel, so as to reduce the difficulty in adjusting the gas supply pressure and the pressure of the liquid fuel bottle, and make the adjustment of the internal pressure of the liquid fuel bottle more simple and convenient.

[0008] According to some embodiments of the present application, the pump tank further comprises: a shell, a liner arranged in the shell, the booster pump is arranged in the liner, and the inlet and outlet of the pump tank are formed on the liner.

[0009] In some embodiments, the fuel supply system further comprises: a first check valve arranged on the outlet of the pump tank, the pump outlet is communicated with the booster pipeline, the supply pipeline and the first check valve.

[0010] Further, a liquid outlet valve and a second check valve are arranged in sequence between the inlet and the liquid outlet of the pump tank.

[0011] In some embodiments, the supply pipeline comprises: a third check valve, a flow valve, a vaporizer, a buffer tank, a pressure stabilizing valve and an aviation joint communicated in sequence, the third check valve is communicated with the first check valve, and the aviation joint is communicated with the fuel inlet.

[0012] According to some embodiments of the present application, the booster pipeline comprises: a booster automatic valve and a booster communicated in sequence, the booster automatic valve is communicated with the pump outlet and the first check valve, and the booster is communicated with the booster gas phase port.

[0013] In some embodiments, the liquid fuel bottle further comprises: a liquid inlet, a discharge port and a vacuum port, and the fuel supply system further comprises: a filling pipeline, an explosion-proof valve and a safety pipeline, the filling pipeline is communicated with the liquid inlet, the explosion-proof valve is communicated with the vacuum port, and the safety pipeline is communicated with the discharge port or the booster pipeline.

[0014] Further, the filling pipeline comprises: a fourth check valve and a filling joint communicated in sequence, the filling joint is communicated with a fuel filling port, and the fourth check valve is communicated with the liquid inlet.

[0015] Further, the safety pipeline comprises: a first safety pipeline and a second safety pipeline, the first safety pipeline is communicated with the discharge port, and the second safety pipeline is communicated with the booster pipeline.

[0016] Further, the second safety pipeline and the booster pipeline are further communicated with a gas return port through a gas return pipeline.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic view of a fuel supply line according to an embodiment of the present application.

[0020] Reference Signs:

[0021] a fuel supply system 100,

[0022] a liquid fuel bottle 1, a liquid level gauge 101,

[0023] a pump tank 2, a booster pump 201, a housing 202, an inner container 203,

[0024] a supply line 3, a third one-way valve 301, a flow valve 302, a vaporizer 303, a buffer tank 304, a pressure stabilizer 305, an aviation joint 306, a supply pressure sensor 307, a buffer tank pressure sensor 308, a supply line safety valve 309,

[0025] a booster line 4, a booster automatic valve 401, a booster 402,

[0026] a first one-way valve 5, a liquid outlet valve 6, a second one-way valve 7,

[0027] a filling line 8, a fourth one-way valve 801, a filling joint 802,

[0028] a first safety line 9, a first stage safety valve 901,

[0029] a second safety line 10, a second stage safety valve 1001, a manual pressure relief valve 1002,

[0030] a return line 11, a return valve 1101, a return port 1102,

[0031] an explosion-proof valve 12,

[0032] a pressure detection line 13, a pressure gauge valve 1301, a fuel bottle pressure sensor 1302, a fuel bottle pressure gauge 1303. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by like or similar reference signs throughout the drawings. The embodiments described below are exemplary only, and are not intended to limit the present application.

[0034] Reference is made to Figure 1 a fuel supply system 100 according to an embodiment of the present application is described below.

[0035] As Figure 1As shown, the fuel supply system 100 of the fuel cell according to the embodiment of the present application comprises a liquid fuel bottle 1, a pump pool 2, a supply pipeline 3 and a pressurization pipeline 4.

[0036] Referring to Figure 1 , the liquid fuel bottle 1 has a liquid outlet and a pressurized gas phase outlet; the pump pool 2 has a pressurization pump 201 for pressurizing the pump pool 2, and the inlet of the pump pool 2 is communicated with the liquid outlet; the supply pipeline 3 is communicated with the outlet of the pump pool 2, and the other end is communicated with the fuel inlet of the fuel cell; one end of the pressurization pipeline 4 is communicated with the pump outlet of the pressurization pump 201, and the other end is communicated with the pressurized gas phase outlet; wherein the pressure of the liquid fuel bottle 1 is less than the critical pressure of the liquid fuel.

[0037] Specifically, the liquid outlet of the liquid fuel bottle 1 is communicated with the pump pool 2, the pump pool 2 can store the fuel flowing out of the liquid fuel bottle 1, the pressurization pump 201 is arranged in the pump pool 2, and the fuel in the pump pool 2 can be pressurized, and the pressurized fuel can be supplied to the supply pipeline 3, and the supply pipeline 3 can supply the vaporized fuel meeting the fuel supply pressure requirement of the fuel cell to the fuel inlet of the fuel cell; when the liquid fuel bottle 1 needs to be pressurized to ensure the pressure difference between the liquid fuel bottle 1 and the pump pool 2, so that the liquid fuel bottle 1 can stably supply fuel, the pressurized fuel can be supplied to the liquid fuel bottle 1 by the pressurization pump 201 to realize the pressurization of the liquid fuel bottle 1.

[0038] According to the fuel supply system 100 of the fuel cell of the embodiment of the present application, by arranging the pump pool 2 and making the pressure of the liquid fuel bottle 1 less than the critical pressure of the liquid fuel, on the one hand, the fuel supply pressure can meet the use requirement of the fuel cell; on the other hand, the pressure and temperature in the liquid fuel bottle 1 can be prevented from exceeding the critical value to produce supercritical state fuel, so as to reduce the difficulty of adjusting the fuel supply pressure and the pressure of the liquid fuel bottle 1, and make the internal pressure adjustment of the liquid fuel bottle 1 more simple and convenient.

[0039] As shown in Figure 1 , according to some embodiments of the present application, the pump pool 2 further comprises an outer shell 202, an inner container 203 arranged in the outer shell 202, and the pressurization pump 201 arranged in the inner container 203, and the inlet and outlet of the pump pool 2 are formed on the inner container 203.

[0040] Specifically, the pressurization pump 201 can make the pressure of the fuel in the inner container 203 rise to meet the fuel supply pressure requirement, and the outlet of the pressurization pump 201 can be communicated with the pressurization pipeline 4 to increase the pressure in the liquid fuel bottle 1 by the pressurization pump 201.

[0041] In Figure 1In the specific embodiment shown, the fuel supply system 100 further comprises a first one-way valve 5, which is arranged at the outlet of the pump pool 2, and which is in communication with the boost pipeline 4, the supply pipeline 3 and the first one-way valve 5.

[0042] It should be noted that by arranging the first one-way valve 5 and making it in communication with the supply pipeline 3, the boost pipeline 4 and the pump outlet, when the liquid fuel bottle 1 is boosted by the boost pump 201, the first one-way valve 5 is closed to avoid backflow (i.e. to avoid the fuel with high pressure flowing back to the inner container 203), and when the inner container 203 has high pressure, the boost of the liquid fuel bottle 1 can be realized, the outlet of the pump pool 2 is in communication with the boost pipeline 4 to boost the boost pipeline 4, and the pressure in the inner container 203 is reduced while the pressure in the liquid fuel bottle 1 is increased, so as to ensure the pressure difference between the liquid fuel bottle 1 and the inner container 203 and improve the stability of the fuel supply system 100.

[0043] Further, the inlet and the outlet of the pump pool 2 are further provided with a liquid outlet valve 6 and a second one-way valve 7 in sequence. Thus, the fuel supply from the liquid fuel bottle 1 to the pump pool 2 is controlled by the liquid outlet valve 6, and the backflow of the fuel is avoided by the second one-way valve 7, so as to further improve the working stability of the fuel supply system 100.

[0044] As shown in some embodiments, Figure 1 The supply pipeline 3 comprises a third one-way valve 301, a flow valve 302, a vaporizer 303, a buffer tank 304, a pressure stabilizing valve 305 and an aviation joint 306 in sequence, the third one-way valve 301 is in communication with the first one-way valve 5, and the aviation joint 306 is in communication with the fuel inlet.

[0045] Thus, when the fuel is supplied, the liquid fuel flows from the boost pump 201 to the third one-way valve 301, the third one-way valve 301 avoids the backflow of the liquid fuel, the flow valve 302 limits the flow of the liquid fuel to avoid overflow, the vaporizer 303 vaporizes the liquid fuel, the buffer tank 304 buffers the gaseous fuel after vaporization, and the gaseous fuel after buffering is stabilized and then delivered to the fuel inlet of the fuel cell through the aviation joint 306, so as to improve the stability of the fuel supply.

[0046] The buffer tank 304 can be selected according to the use requirement, for example, 40L.

[0047] Further, a buffer tank pressure sensor 308 and a supply pipeline safety valve 309 are arranged in parallel between the pressure stabilizing valve 305 and the buffer tank 304, the buffer tank pressure sensor 308 is used to detect the pressure in the buffer tank 304 in real time, and the supply pipeline safety valve 309 is used to open and release pressure when the pressure of the supply pipeline 3 is too large, so as to improve the working stability of the fuel supply system 100. The gas supply pressure sensor 307 is arranged between the pressure stabilizing valve 305 and the aviation joint, and is used to detect the gas supply pressure. Whether the gas supply pressure meets the demand of the gas supply pressure can be obtained, and can be fed back to the booster pump 201 for adjustment.

[0048] According to some embodiments of the present application, the booster pipeline 4 comprises: a booster automatic valve 401 and a booster 402 which are sequentially communicated, the booster automatic valve 401 is communicated with the pump outlet and the first one-way valve 5, and the booster 402 is communicated with the booster gas phase port.

[0049] In this way, when it is necessary to pressurize the liquid fuel bottle 1, the outlet of the pump tank 2 can be controlled to communicate with the booster automatic valve 401 and the booster 402 for pressurization, and the pressure of the inner container 203 is reduced, so as to realize the stability of fuel supply, or the booster pump 201, the booster automatic valve 401 and the booster 402 are directly used for pressurization, so as to realize automatic pressurization of the liquid fuel bottle 1.

[0050] As shown in Figure 1 some embodiments, the liquid fuel bottle 1 further comprises: a liquid inlet, a discharge port and a vacuum port, and the fuel supply system 100 further comprises: a filling pipeline 8, an explosion-proof valve 12 and a safety pipeline, the filling pipeline 8 is communicated with the liquid inlet, the explosion-proof valve 12 is communicated with the vacuum port, and the safety pipeline is communicated with the discharge port or the booster pipeline 4.

[0051] Therefore, the filling of liquid fuel is realized through the filling pipeline 8, the safety of the fuel supply system 100 is realized through the safety pipeline, and the explosion-proof valve 12 is used for timely pressure relief, so as to ensure the safety of the liquid fuel bottle 1.

[0052] Further, a liquid level meter 101 can be arranged in the liquid fuel bottle 1, so as to facilitate the user to judge the fuel remaining amount in the liquid fuel bottle 1.

[0053] Referring to Figure 1 the filling pipeline 8 comprises: a fourth one-way valve 801 and a filling joint 802 which are sequentially communicated, the filling joint 802 is communicated with the fuel filling port, and the fourth one-way valve 801 is communicated with the liquid inlet.

[0054] It can be understood that the safety pipeline comprises: a first safety pipeline 9 and a second safety pipeline 10, the first safety pipeline 9 is communicated with the discharge port, and the second safety pipeline 10 is communicated with the booster pipeline 4.

[0055] That is, the first safety pipeline 9 evacuates the liquid fuel bottle 1 when the pressure in the liquid fuel bottle 1 is too high or a fault occurs, and the second safety pipeline 10 can perform the evacuation process when the booster pipeline 4 fails, thereby improving the use safety of the fuel supply system 100.

[0056] Specifically, the first safety pipeline 9 has a first safety valve 901, which is opened to correspond to the discharge port and the outside, thereby realizing discharge, and the second safety pipeline 10 includes a manual pressure relief valve 1002 and a second safety valve 1001 in parallel, and can perform pressure relief through the manual pressure relief valve 1002 or the second safety valve 1001, thereby avoiding safety accidents caused by the failure of the booster pipeline 4 and improving safety.

[0057] Further, the second safety pipeline 10 and the booster pipeline 4 are also connected to the gas return port 1102 through the gas return pipeline 11.

[0058] Specifically, the gas return pipeline 11 has a gas return valve 1101, which is connected to the booster pipeline 4 and can control the gas return of the liquid fuel bottle 1, thereby improving safety.

[0059] In Figure 1 In the specific embodiment shown, the fuel supply system 100 further includes a pressure detection pipeline 13, which includes a pressure gauge valve 1301, a fuel bottle pressure sensor 1302, and a fuel bottle pressure gauge 1303. The pressure gauge valve 1301 is arranged in parallel with the manual pressure relief valve 1002, the outlet of the pressure gauge valve 1301 is connected to the fuel bottle pressure sensor 1302 and the fuel bottle pressure gauge 1303, the fuel bottle pressure sensor 1302 detects the pressure of the liquid fuel bottle 1 in real time, the pressure gauge reflects the pressure value in real time, the pressure gauge is convenient for the user to observe the pressure, and the fuel bottle pressure sensor 1302 is electrically connected to the controller. When the pressure of the liquid fuel bottle 1 is too high or too low, it can be fed back to the controller, and the controller controls the corresponding safety pipeline or booster pump 201 to work, thereby realizing the dynamic balance of the fuel supply system 100 and improving the working stability and safety of the fuel supply system 100.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] In the description of the application, "first feature", "second feature" can include one or more of the features.

[0062] In the description of the application, "a plurality of" means two or more.

[0063] In the description of the application, "on" or "under" the first feature of the second feature can include the first and second features directly contact, but also can include the first and second features are not directly contact but through the additional features between them contact.

[0064] In the description of the application, "on", "above" and "over" the first feature of the second feature includes the first feature directly above and obliquely above the second feature, or just means the first feature is higher than the second feature in level.

[0065] In the description of the application, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A fuel supply system (100) of a fuel cell, characterized by, The application relates to a fuel supply system (100) for a fuel cell, comprising: a liquid fuel bottle (1) having a liquid outlet and a pressurized gas phase outlet; a pump pool (2) provided with a pressurized pump (201), the inlet of the pump pool (2) being communicated with the liquid outlet; a supply pipeline (3) communicated with the pump outlet of the pressurized pump (201) and communicated with the fuel inlet of the fuel cell at the other end; a pressurized pipeline (4) communicated with the pump outlet at one end and communicated with the pressurized gas phase outlet at the other end; wherein the pressure of the liquid fuel bottle (1) is less than the critical pressure of the liquid fuel; the supply pipeline (3) comprises a buffer tank (304) communicated with the pump outlet and the fuel inlet.

2. The fuel supply system (100) of a fuel cell according to claim 1, characterized by The pump pool (2) further comprises an outer shell (202) and a liner (203) arranged in the outer shell (202), the pressurized pump (201) being arranged in the liner (203), the inlet and outlet of the pump pool (2) being formed on the liner (203).

3. The fuel supply system (100) of a fuel cell according to claim 2, characterized by The application further relates to a fuel supply system (100) for a fuel cell, comprising: a first one-way valve (5) arranged on the outlet of the pump pool (2), the pump outlet being communicated with the pressurized pipeline (4), the supply pipeline (3) and the first one-way valve (5).

4. The fuel supply system (100) of a fuel cell according to claim 1, characterized by a liquid outlet valve (6) and a second one-way valve (7) arranged in sequence and communicated between the inlet and the liquid outlet of the pump pool (2).

5. The fuel supply system (100) of a fuel cell according to claim 3, characterized by The supply pipeline (3) comprises a third one-way valve (301), a flow valve (302), a vaporizer (303), the buffer tank (304), a pressure stabilizing valve (305) and an aviation joint (306) arranged in sequence and communicated, the third one-way valve (301) being communicated with the first one-way valve (5), and the aviation joint (306) being communicated with the fuel inlet.

6. The fuel supply system (100) of a fuel cell according to claim 3, characterized by The pressurized pipeline (4) comprises a pressurized automatic valve (401) and a pressurizer (402) arranged in sequence and communicated, the pressurized automatic valve (401) being communicated with the pump outlet and the first one-way valve (5), and the pressurizer (402) being communicated with the pressurized gas phase outlet.

7. The fuel supply system (100) of a fuel cell according to claim 1, characterized by The liquid fuel bottle (1) further comprises a liquid inlet, a discharge port and a vacuumizing port, the fuel supply system (100) further comprises a filling pipeline (8), an explosion-proof valve (12) and a safety pipeline, the filling pipeline (8) being communicated with the liquid inlet, the explosion-proof valve (12) being communicated with the vacuumizing port, and the safety pipeline being communicated with the discharge port or the pressurized pipeline (4).

8. The fuel supply system (100) of a fuel cell according to claim 7, characterized by The filling pipeline (8) comprises a fourth one-way valve (801) and a filling joint (802) arranged in sequence and communicated, the filling joint (802) being communicated with a fuel filling port, and the fourth one-way valve (801) being communicated with the liquid inlet.

9. The fuel supply system (100) of a fuel cell according to claim 7, characterized by The safety pipeline comprises a first safety pipeline (9) and a second safety pipeline (10), the first safety pipeline (9) being communicated with the discharge port, and the second safety pipeline (10) being communicated with the pressurized pipeline (4).

10. The fuel supply system (100) of a fuel cell according to claim 9, characterized by The second safety pipeline (10) and the supercharging pipeline (4) are also communicated with a back gas port (1102) through a back gas pipeline (11).

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