CN220652049U

CN220652049U - Purging system and vehicle

Info

Publication number: CN220652049U
Application number: CN202322249394.1U
Authority: CN
Inventors: 钟兵; 石朋亮; 田海洋; 吕星辰; 田礼凯
Original assignee: Tehi Hydrogen Energy Testing Baoding Co ltd
Current assignee: Tehi Hydrogen Energy Testing Baoding Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-03-22
Anticipated expiration: 2033-08-21

Abstract

The utility model discloses a purging system and a vehicle, wherein the purging system is applied to a fuel cell stack, the fuel cell stack is provided with an anode channel, and the anode channel is provided with a first opening and a second opening; the purge system includes: the device comprises an air supply pipeline, a direction switching valve, a first pipeline and a second pipeline; the direction switching valve is provided with an air inlet, a first valve port, a second valve port and an air outlet; the air inlet is communicated with the air supply pipeline so as to receive air from the air supply pipeline; the first valve port is communicated with the first opening through a first pipeline; the second valve port is communicated with the second opening through a second pipeline; the air inlet and the air outlet can be selectively communicated with different valve ports in the first valve port and the second valve port respectively through flow passages in the direction switching valve, so that gas flows through the anode channel to realize anode channel purging. The device realizes forward purging and reverse purging, and has a simple and clear structure.

Description

Purging system and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a purging system and a vehicle.

Background

In the related art, a fuel cell stack is provided with a reverse purge valve, a bypass valve and an air outlet valve for forward purging and reverse purging, and the structure is complex.

Disclosure of Invention

In view of this, the present utility model aims to propose a purge system.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a purge system applied to a fuel cell stack having an anode channel with a first opening and a second opening; the purge system includes: the device comprises an air supply pipeline, a direction switching valve, a first pipeline and a second pipeline; the direction switching valve is provided with an air inlet, a first valve port, a second valve port and an air outlet; the air inlet is communicated with the air supply pipeline so as to receive air from the air supply pipeline; the first valve port is communicated with the first opening through the first pipeline; the second valve port is communicated with the second opening through the second pipeline; the air inlet and the air outlet can be respectively and selectively communicated with different valve ports in the first valve port and the second valve port through flow passages in the direction switching valve, so that the gas flows through the anode channel to realize anode channel purging.

According to the purging system provided by the embodiment of the utility model, the direction switching valve is arranged to enable the air supply pipeline to be switched and communicated with the first opening and the second opening, so that forward purging and reverse purging are realized, and the purging system is simple and clear in structure.

In addition, the purge system according to the above embodiment of the present utility model may have the following additional technical features:

according to some embodiments of the utility model, the direction switching valve includes: the valve casing is provided with the air inlet, the first valve port, the second valve port and the air outlet; the valve core is movably arranged in the valve housing and is provided with a first flow passage, a second flow passage, a third flow passage and a fourth flow passage; the electromagnetic power piece drives the valve core to move, so that the air inlet, the first runner and the first valve port are communicated, the air outlet, the third runner and the second valve port are communicated, or the air inlet, the second runner and the second valve port are communicated, and the air outlet, the fourth runner and the first valve port are communicated.

According to some embodiments of the utility model, the inlet and the first port are in a first plane and the outlet and the second port are in a second plane; the first flow channel and the third flow channel are arranged in parallel on the vertical plane in a projection way, the air inlet can be communicated with the first valve port through the first flow channel, and the air outlet can be communicated with the second valve port through the third flow channel; the second flow channel and the fourth flow channel are arranged in a projection crossing way on the vertical plane, the air inlet can be communicated with the second valve port through the second flow channel, and the air outlet can be communicated with the first valve port through the fourth flow channel.

According to some embodiments of the utility model, the purge system further comprises: a control member; the impedance instrument is arranged on the fuel cell stack to measure the impedance value of the fuel cell stack, and the control piece is electrically connected with the impedance instrument and controls the direction switching valve to work according to the impedance value.

According to some embodiments of the utility model, the purge system further comprises: and the exhaust port is communicated with the recovery pipeline, and a circulating pump is arranged between the gas supply pipeline and the recovery pipeline so as to pump the gas recovered by the recovery pipeline to the gas supply pipeline.

According to some embodiments of the utility model, the purge system further comprises: the steam-water separation piece is arranged between the air supply pipeline and the recovery pipeline and is positioned at the upstream of the circulating pump, so that liquid water and dry gas are separated from the mixture recovered by the recovery pipeline.

According to some embodiments of the utility model, the steam-water separator has a drain communicating with a tail row to drain the liquid water.

According to some embodiments of the utility model, a purge solenoid valve is provided on the drain port, the purge solenoid valve purging the liquid water to drain the liquid water out of the steam-water separator.

According to some embodiments of the utility model, the purge system further comprises: the hydrogen pipeline, hydrogen pipeline one end intercommunication hydrogen source, the other end intercommunication the air feed pipeline is equipped with the hydrogen sprayer on the hydrogen pipeline, and pass through the hydrogen sprayer to let in the hydrogen that has certain pressure in the air feed pipeline.

Another object of the utility model is to propose a vehicle.

a vehicle comprising the purge system described above. The advantages of the vehicle and the purging system over the prior art are the same and are not described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic illustration of a purge system for forward purging a fuel cell stack according to the present utility model;

FIG. 2 is a schematic diagram of a reverse purge fuel cell stack according to the present utility model;

FIG. 3 is a schematic illustration of a forward purge directional switch valve according to the present utility model;

FIG. 4 is a schematic illustration of a reverse purge directional switch valve according to the present utility model;

FIG. 5 is a flow chart of purge system control in accordance with the present utility model.

Reference numerals:

100. a purge system;

10. an air supply duct; 11. a circulation pump; 14. a hydrogen injector;

20. a direction switching valve; 21. an air inlet; 22. a first valve port; 23. a second valve port; 27. an exhaust port; 24. a valve housing; 25. a valve core; 251. a first flow passage; 252. a second flow passage; 253. a third flow passage; 254. a fourth flow passage; 26. an electromagnetic power piece;

30. an impedance meter; 40. a steam-water separation member; 42. purging the electromagnetic valve; 50. a recovery pipe; 60. a hydrogen pipe; 70. a first pipe; 80. a second pipe;

200. a fuel cell stack; 202. a first opening; 203. and a second opening.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The present utility model will be described in detail below with reference to fig. 1 to 5 in conjunction with the embodiments.

As shown in fig. 1 and 2, according to the purge system 100 of the embodiment of the present utility model, the purge system 100 is applied to a fuel cell stack 200, and the fuel cell stack 200 has an anode channel having a first opening 202 and a second opening 203.

The purge system 100 includes: a gas supply duct 10, a direction switching valve 20, a first duct 70, and a second duct 80.

The direction switching valve 20 has an intake port 21, a first valve port 22, a second valve port 23, and an exhaust port 27.

The gas inlet 21 communicates with the gas supply duct 10 to receive gas from the gas supply duct 10.

The first valve port 22 communicates with the first opening 202 through the first conduit 70.

The second valve port 23 communicates with the second opening through a second conduit 80.

The inlet 21 and the outlet 27 are selectively communicated with different valve ports of the first valve port 22 and the second valve port 23 through flow passages inside the direction switching valve 20, respectively, so that gas flows through the anode channel to realize anode channel purging.

That is, the flow passage inside the direction switching valve 20 communicating with the intake port 21 may be switched so that the intake port 21 communicates with the first valve port 22, or so that the intake port 21 communicates with the second valve port 23; the flow path inside the direction switching valve 20 communicating with the exhaust port 27 may be switched so that the exhaust port 27 communicates with the first valve port 22 or so that the exhaust port 27 communicates with the second valve port 23.

Wherein the fuel cell stack requires hydrogen for operation, the hydrogen being supplied into the anode channels. In the operation process of the fuel cell stack, liquid water generated by the cathode of the cell is reversely diffused to the anode, and the liquid water is frozen under the condition of low temperature, so that the flow of hydrogen is blocked, and the conditions of starvation or start failure of the anode hydrogen and the like can be caused. The direction switching valve 20 of this application makes air feed pipe 10 switch and communicate first opening 202, second opening 203, utilizes the gas of circulation to sweep liquid water, switches and communicates first opening 202, second opening 203 and realizes forward sweeping, reverse sweeping for liquid water is inside more even at fuel cell stack 200, realizes simple structure.

According to the purging system 100 of the embodiment of the present utility model, the direction switching valve 20 is provided to switch the air supply pipeline 10 to communicate the first opening 202 and the second opening 203, so that the forward purging and the directional purging of the fuel cell stack 200 are realized, and the structure is simplified.

It should be noted that, the purging system 100 of the present application is suitable for shutdown purging (purging when the fuel cell stack 200 is shutdown), and is also suitable for shutdown purging (purging added outside shutdown purging when the vehicle sensing ambient temperature is lower than a certain temperature in order to ensure the next normal start-up and avoid the stack icing).

As shown in fig. 1 to 4, according to some embodiments of the present utility model, the direction switching valve 20 has an intake port 21, a first valve port 22, a second valve port 23, the air supply duct 10 communicates with the intake port 21, the first opening 202 communicates with the first valve port 22, the second opening 203 communicates with the second valve port 23, and the direction switching valve 20 operates to communicate the intake port 21 with the first valve port 22, or the intake port 21 with the second valve port 23. Through setting up air inlet 21, first valve port 22, second valve port 23, the three communicates air feed line 10, first opening 202 and second opening 203 respectively, and the structure is clear, has reduced the probability of mistake of dress.

As shown in fig. 3 and 4, the direction switching valve 20 according to some embodiments of the present utility model includes: valve housing 24, valve core 25 and electromagnetic power piece 26.

The valve housing 24 is provided with an intake port 21, a first port 22, a second port 23, and an exhaust port 27.

The valve core 25 is movably disposed in the valve housing 24, and the valve core 25 is provided with a first flow channel 251, a second flow channel 252, a third flow channel 235 and a fourth flow channel 254.

The electromagnetic power member 26 drives the spool 25 to move so as to communicate the intake port 21, the first flow passage 251, the first valve port 22, and communicate the exhaust port 27, the third flow passage 253, the second valve port 23, or to communicate the intake port 21, the second flow passage 252, the second valve port 23, and communicate the exhaust port 27, the fourth flow passage 254, and the first valve port 22. For example, the electromagnetic power member 26 is an electromagnetic coil, and when the electromagnetic coil is energized, a magnetic force is generated, and the magnetic force acts on the valve core 25 to drive the valve core 25 to move.

For example, the spool 25 has two working positions: when the valve core 25 is in the first position, the air inlet 21, the first flow passage 251 and the first valve port 22 are communicated, and the air outlet 27, the third flow passage 253 and the second valve port 23 are communicated, so that the air is positively purged. When the valve core 25 is in the second position, the air inlet 21, the second flow passage 252 and the second valve port 23 are communicated, and meanwhile, the air outlet 27, the fourth flow passage 254 and the first valve port 22 are communicated, so that the air is purged reversely.

The electromagnetic power piece 26 is utilized to drive the valve core 25 to move, so that the response speed is improved.

According to some embodiments of the utility model, the inlet 21 and the first port 22 are located in a first plane and the outlet 27 and the second port 23 are located in a second plane; wherein, the first flow channel 251 and the third flow channel 253 are arranged in parallel on the vertical plane, the air inlet 21 can be communicated with the first valve port 22 through the first flow channel 251, and the air outlet 27 can be communicated with the second valve port 23 through the third flow channel 253; the second flow channel 252 and the fourth flow channel 254 are arranged in a projection crossing manner on a vertical plane, the air inlet 21 can be communicated with the second valve port 23 through the second flow channel 252, and the air outlet 27 can be communicated with the first valve port 22 through the fourth flow channel 254. Wherein the first plane, the second plane and the vertical plane are virtual planes.

The projection parallel arrangement of the first runner 251 and the third runner 253 on the vertical plane is arranged, so that the first runner 251 and the third runner 253 are smoothly communicated with the air inlet 21, the first valve port 22, the air outlet 27 and the second valve port 23, the projection cross arrangement of the second runner 252 and the fourth runner 254 on the vertical plane is arranged, and the valve core 25 is movably switched into the smooth communication of the second runner 252, the fourth runner 254, the air inlet 21, the first valve port 22, the air outlet 27 and the second valve port 23, so that the valve is smooth and convenient.

According to some embodiments of the utility model, the first flow channel 251 is disposed on a first side of the second flow channel 252, and the third flow channel 253 is disposed on a first side of the fourth flow channel 254. That is, by providing the first flow passage 251 and the third flow passage 253 on the same side, the movement of the spool 25 is facilitated.

For example, the first flow channel 251 is disposed on the upper side of the second flow channel 252, the third flow channel 253 is also disposed on the upper side of the fourth flow channel 254, and the valve core 25 can be switched between the first position and the second position by moving the valve core 25 up and down; alternatively, the first flow passage 251 is provided on the left side of the second flow passage 252, the third flow passage 253 is provided on the left side of the fourth flow passage 254, and the valve element 25 is shifted to the left and right so that the valve element 25 is switched between the first position and the second position.

As shown in fig. 1, 2, a purge system 100, according to some embodiments of the utility model, includes: control and impedance meter 30.

The impedance meter 30 is arranged on the fuel cell stack 200 to measure the impedance value of the fuel cell stack 200, and the control element is electrically connected with the impedance meter 30 and controls the direction switching valve 20 to operate according to the impedance value. By providing the impedance meter 30, the impedance value is used as an index for judging the operation of the direction switching valve 20, which is convenient and straightforward.

The impedance value corresponds to the water content, and the more the water content is, the smaller the impedance value is.

Specifically, the impedance meter 30 measures the impedance value by applying a sinusoidal current to the fuel cell stack 200 and sweeping the frequency.

In some embodiments, the impedance value is greater than or equal to Z1, and the control direction switching valve 20 communicates the air supply duct 10 with the second opening 203; the impedance value is greater than or equal to Z2 and the purge is stopped.

In the related art, hydrogen is purged unidirectionally, the hydrogen enters from the inlet side of the anode, the hydrogen is discharged from the outlet side of the anode, and the liquid water in the anode is taken out, the unidirectional purging is stopped when the impedance value reaches Z3, so that the liquid water content of the outlet side of the anode is lower than a certain value to meet the cold start condition of the fuel cell stack, the water content of the inlet side of the anode is too low, and the purging is excessive. The present application provides for a more balanced liquid water within the fuel cell stack 200 by providing a bi-directional purge.

Further, in the present application, Z2 is smaller than Z3, that is, when the cold start of the fuel cell stack 200 is satisfied, the content of liquid water in the fuel cell stack 200 is more, so that the consumption of gas in the purging process is reduced, the utilization efficiency is improved, and the driving mileage of the whole vehicle is improved.

According to some embodiments of the utility model, the purge system 100 further comprises: the recovery pipe 50 and the exhaust port 27 are connected to the recovery pipe 50, and the direction switching valve 20 is operated to communicate the intake port 21 with the first valve port 22, the second valve port 23 with the exhaust port 27, or to communicate the intake port 21 with the second valve port 23, the first valve port 22 with the exhaust port 27.

Wherein, a circulation pump 11 is provided between the gas supply pipe 10 and the recovery pipe 50 to pump the gas recovered by the recovery pipe 50 to the gas supply pipe 10. The utilization rate is further improved by providing the recovery pipe 50 to recycle the purged gas.

When the air supply duct 10 communicates with the first opening 202, the recovery duct 50 communicates with the second opening 203, and when the air supply duct 10 communicates with the second opening 203, the recovery duct 50 communicates with the first opening 202.

As shown in fig. 1 and 2, the purge system 100 according to some embodiments of the present utility model is further shown to include: and a steam-water separator 40, the steam-water separator 40 being disposed between the gas supply pipe 10 and the recovery pipe 50 and upstream of the circulation pump 11 to separate liquid water and dry gas from the mixture recovered by the recovery pipe 50. The liquid water is separated by providing the steam-water separator 40, and the recovered gas is purified.

In some embodiments, the purge system 100 further comprises: the steam-water separator 40, the steam-water separator 40 communicates with the recovery pipe 50 to separate out nitrogen.

Specifically, the steam-water separator 40 separates gas from liquid water using a centrifugal principle.

As shown in fig. 1 and 2, specifically, the steam-water separator 40 is located upstream of the circulation pump 11, that is, the steam-water separator 40 is provided between the recovery pipe 50 and the circulation pump 11. By disposing the steam-water separator 40 between the recovery pipe 50 and the circulation pump 11, the recovered gas is first separated and dried, and the influence of the circulation pump 11 on hydrogen drying is reduced.

According to some embodiments of the present utility model, the steam-water separator 40 has a drain port that communicates with the tail row to drain the liquid water. Through setting up the drainage mouth intercommunication tail row, the liquid water of unified discharge separation utilizes current tail row, has improved the utilization ratio.

As shown in fig. 1 and 2, according to some embodiments of the present utility model, a purge solenoid valve 42 is provided at the drain port, and the purge solenoid valve 42 purges the liquid water to discharge the liquid water out of the steam-water separator 40. The steam-water separation piece 40 is purged through the purging electromagnetic valve 42, so that separated liquid water is quickly discharged into the tail row, and the efficiency is improved.

As shown in fig. 1 and 2, the purge system 100, according to some embodiments of the present utility model, further includes: and one end of the hydrogen pipeline 60 is communicated with a hydrogen source, the other end of the hydrogen pipeline 60 is communicated with the gas supply pipeline 10, the hydrogen pipeline 60 is provided with a hydrogen injector 14, and hydrogen with certain pressure is introduced into the gas supply pipeline 10 through the hydrogen injector 14. By providing the hydrogen injector 14 to inject hydrogen into the gas supply pipe 10, the pressure of the purge gas is increased by the hydrogen, and the purge effect is further improved. The hydrogen source is a source of hydrogen, and supplies hydrogen.

The hydrogen injector 14 controls the hydrogen supply amount of the anode of the fuel cell stack 200, and the electronic control unit of the fuel cell stack 200 typically adjusts the opening pulse width and period of the hydrogen injector 14 to adjust the supply amount.

It should be noted that, the hydrogen source supplies hydrogen to the air supply pipeline 10, so that consumption of gas in the liquid water discharged by the steam-water separation part 40 can be supplemented, and it can be understood that gas is sprayed out along with the liquid water sprayed out by the steam-water separation part 40, so that air pressure in the purging system 100 is reduced.

According to an embodiment of the present utility model, a vehicle includes: fuel cell stack 200 and purge system 100.

The fuel cell stack 200 is a power generation device that directly converts chemical energy in externally supplied fuel and oxidant into electric energy, thermal energy, and other reaction products through electrochemical reactions.

The purge system 100 is connected to the fuel cell stack 200, supplies gas to the fuel cell stack 200, and purges the fuel cell stack 200 with the gas to reduce the influence of liquid water.

According to the vehicle provided by the embodiment of the utility model, the number of parts is reduced by arranging the purging system 100, the structure is simplified, and the structure is more compact.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A purge system, wherein the purge system is applied to a fuel cell stack having an anode channel with a first opening and a second opening; the purge system includes: the device comprises an air supply pipeline, a direction switching valve, a first pipeline and a second pipeline;

the direction switching valve is provided with an air inlet, a first valve port, a second valve port and an air outlet;

the air inlet is communicated with the air supply pipeline so as to receive air from the air supply pipeline;

the first valve port is communicated with the first opening through the first pipeline;

the second valve port is communicated with the second opening through the second pipeline;

the air inlet and the air outlet can be respectively and selectively communicated with different valve ports in the first valve port and the second valve port through flow passages in the direction switching valve, so that the gas flows through the anode channel to realize anode channel purging.

2. The purge system of claim 1, wherein the direction switching valve comprises:

the valve casing is provided with the air inlet, the first valve port, the second valve port and the air outlet;

the valve core is movably arranged in the valve housing and is provided with a first flow passage, a second flow passage, a third flow passage and a fourth flow passage;

the electromagnetic power piece drives the valve core to move, so that the air inlet, the first runner and the first valve port are communicated, the air outlet, the third runner and the second valve port are communicated, or the air inlet, the second runner and the second valve port are communicated, and the air outlet, the fourth runner and the first valve port are communicated.

3. The purge system of claim 2, wherein the inlet and the first port are in a first plane and the outlet and the second port are in a second plane; the first flow channel and the third flow channel are arranged in parallel on the vertical plane in a projection way, the air inlet can be communicated with the first valve port through the first flow channel, and the air outlet can be communicated with the second valve port through the third flow channel; the second flow channel and the fourth flow channel are arranged in a projection crossing way on the vertical plane, the air inlet can be communicated with the second valve port through the second flow channel, and the air outlet can be communicated with the first valve port through the fourth flow channel.

4. The purge system of claim 1, further comprising:

a control member;

the impedance instrument is arranged on the fuel cell stack to measure the impedance value of the fuel cell stack, and the control piece is electrically connected with the impedance instrument and controls the direction switching valve to work according to the impedance value.

5. The purge system of claim 1, further comprising: the exhaust port is communicated with the recovery pipeline _， And a circulating pump is arranged between the gas supply pipeline and the recovery pipeline so as to pump the gas recovered by the recovery pipeline to the gas supply pipeline.

6. The purge system of claim 5, further comprising: the steam-water separation piece is arranged between the air supply pipeline and the recovery pipeline and is positioned at the upstream of the circulating pump, so that liquid water and dry gas are separated from the mixture recovered by the recovery pipeline.

7. The purge system of claim 6, wherein the steam-water separator has a drain communicating with a tail row to drain the liquid water.

8. The purging system as recited in claim 7 wherein a purge solenoid valve is provided on said drain port, said purge solenoid valve purging said liquid water to drain said liquid water out of said steam-water separator.

9. The purge system of claim 6, further comprising: the hydrogen pipeline, hydrogen pipeline one end intercommunication hydrogen source, the other end intercommunication the air feed pipeline is equipped with the hydrogen sprayer on the hydrogen pipeline, and pass through the hydrogen sprayer to let in the hydrogen that has certain pressure in the air feed pipeline.

10. A vehicle, characterized by comprising:

a fuel cell stack;

a purge system according to any one of claims 1 to 9, the purge system being connected to the fuel cell stack.