CN216311844U

CN216311844U - Fuel cell water distribution and storage integrated device and fuel cell system

Info

Publication number: CN216311844U
Application number: CN202122992832.4U
Authority: CN
Inventors: 闪念; 丁铁新; 方川; 张国强; 李飞强
Original assignee: Beijing Sinohytec Co Ltd
Current assignee: Beijing Sinohytec Co Ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-15
Anticipated expiration: 2031-12-02

Abstract

The invention provides a fuel cell water distribution and storage integrated device and a fuel cell system. The device includes pile one, pile two and integrated configuration, be provided with hydrogen entry one and hydrogen export one on the pile one, be provided with hydrogen entry two and hydrogen export two on the pile two, integrated configuration includes the shell, hydrogen outlet manifold one, hydrogen outlet manifold two, the cavity, divide the water export, baffle one, baffle two and baffle three and outlet one, hydrogen outlet manifold one is connected with hydrogen export one, hydrogen outlet manifold two is connected with hydrogen export two, divide the water export to set up in the top of shell, baffle one extends to inside from the top of shell, baffle two extends in the lateral wall slant of shell, baffle three locates the cavity, and the one end of baffle three is connected with the inner of baffle two, all be the acute angle between baffle one and the extension direction of baffle two and baffle three, outlet one locates the bottom of shell. The invention ensures the consistency of the flow of the upper pile and the lower pile, and the communication mode of the upper pile and the lower pile is simple.

Description

Fuel cell water distribution and storage integrated device and fuel cell system

Technical Field

The invention relates to the technical field of fuel cells, in particular to a fuel cell water distribution and storage integrated device and a fuel cell system.

Background

The hydrogen gas path of the fuel cell system mostly adopts a hydrogen reflux mode, and unconsumed hydrogen in a fuel cell stack-out mixture (containing hydrogen, water vapor, nitrogen, liquid water and the like) is supplied to the electric stack again by using a circulating pump or an ejector, so that the hydrogen utilization rate is improved. Because the density difference between the liquid water and the gas is huge, the fuel cell reaction channel is possibly blocked after the liquid water and the gas enter the pile, so that the pile can not work normally, and therefore, a gas-liquid separation device is usually arranged at a hydrogen pile outlet and used for separating the liquid water in the pile gas-liquid mixture and discharging the liquid water out, so that the liquid water is prevented from entering the pile circularly.

And the fuel cell has the advantages of long endurance, high fuel filling speed, strong load-carrying capacity and the like, and the application trend of the fuel cell in the high-power fields of large vehicles, commercial vehicles and the like is more and more obvious. The high power output of the fuel cell system can be realized by adopting a double-stack mode, namely, a mode of connecting two fuel cell stacks in parallel.

Because the fuel cell stack is very sensitive to condition factors such as pressure, flow and the like, the uniform distribution and small difference of the pressure, the flow and the like of the double stacks are required to be ensured; because the hydrogen and air system pipelines have a small amount of liquid water, the situation that the liquid water is not accumulated in the inlet and outlet manifolds of the electric pile is avoided, and the liquid water can be discharged. Because conditions such as the space of the dual stack integration are harsh, it is difficult to design the manifold to satisfy both the distribution uniformity and the drainage capability.

Therefore, it is desirable to provide a fuel cell voltage control system, a control method thereof and a fuel cell system to solve the above technical problems in the prior art.

Disclosure of Invention

The invention aims to provide a fuel cell water diversion and storage integrated device and a fuel cell system, which can ensure the uniformity of the flow of an upper pile and a lower pile and can effectively divert and drain water.

In order to realize the purpose, the following technical scheme is provided:

the invention provides a water dividing and storing integrated device of a fuel cell, which comprises a first galvanic pile, a second galvanic pile and an integrated structure, wherein a first hydrogen inlet and a first hydrogen outlet are arranged on the first galvanic pile, a second hydrogen inlet and a second hydrogen outlet are arranged on the second galvanic pile, the integrated structure comprises a shell, a first hydrogen outlet manifold, a second hydrogen outlet manifold, a cavity, a water dividing outlet, a first baffle plate, a second baffle plate, a third baffle plate and a first water outlet, the first hydrogen outlet manifold is connected with the first hydrogen outlet, the second hydrogen outlet manifold is connected with the second hydrogen outlet, the water dividing outlet is arranged at the top of the shell, the first baffle plate extends inwards from the top of the shell, the second baffle plate extends inwards from the side wall of the shell in an inclined manner, the third baffle plate is arranged in the cavity, one end of the third baffle plate is connected with the inner end of the second baffle plate, and the extending direction of the first baffle plate, the extending direction of the second baffle plate and the extending direction of the third baffle plate The water outlet I is arranged at the bottom of the shell.

Optionally, a space between the lower part of the shell and the first water outlet is conical to form a first liquid storage cavity.

Optionally, the first baffle extends in the vertical direction.

Optionally, the second baffle plate and the third baffle plate are connected at two ends along the width direction, and the middle part along the width direction is provided with an opening shape to form a second water outlet.

Optionally, a second liquid storage cavity is formed between the second baffle and the third baffle.

Optionally, the first hydrogen outlet manifold is disposed obliquely upward from the inside of the housing.

Optionally, the second hydrogen outlet manifold is disposed obliquely upward from the inside of the housing.

Optionally, the axis of the first hydrogen outlet manifold is parallel to the axis of the second hydrogen outlet manifold.

Optionally, the end of the inner end of the second baffle plate is lower than the corresponding end of the second baffle plate.

The invention also provides a fuel cell system which comprises the fuel cell water dividing and storing integrated device in any technical scheme.

Compared with the prior art, the fuel cell water dividing and storing integrated device and the fuel cell system provided by the invention are suitable for a double-stack hydrogen outlet manifold, water dividing and storing integrated structure, the flow consistency of an upper stack and a lower stack is ensured, the upper stack and the lower stack are simple in communication mode, the whole airflow flows at the top of the device and is far away from the liquid level, the influence of liquid level shaking on the gas-liquid separation effect is avoided, and the gas-liquid separation effect is stable. The secondary gas-liquid separation contributes to improving the gas-liquid separation efficiency.

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.

Drawings

The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.

Fig. 1 is a diagram showing a stack assembly of a fuel cell water diversion and storage integrated apparatus according to an embodiment of the present invention;

fig. 2 is a schematic diagram showing the overall structure of the fuel cell water diversion and storage integrated device according to the embodiment of the invention;

fig. 3 is a partial schematic structural diagram of the fuel cell water diversion and storage integrated device according to the embodiment of the invention.

Reference numerals:

100-electric pile one; 101-hydrogen inlet one; 102 a first hydrogen outlet;

200-electric pile II; 201-hydrogen inlet two; 202-hydrogen outlet two;

300-an integrated structure; 301-a housing; 302-hydrogen outlet manifold one; 303-hydrogen outlet manifold two; 304-a cavity; 305-a water diversion outlet; 306-baffle one; 307-baffle two; 308-baffle three; 309-water outlet I; 310-water outlet II; 311-reservoir chamber one; 312-reservoir chamber two; 313-low voltage area.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

As shown in fig. 1-3, the present embodiment provides an integrated water diversion and storage device for a fuel cell, including a first electric pile 100, a second electric pile 200, and an integrated structure 300, wherein the first electric pile 100 is provided with a first hydrogen inlet 101 and a first hydrogen outlet 102, the second electric pile 200 is provided with a second hydrogen inlet 201 and a second hydrogen outlet 202, the integrated structure 300 includes a housing 301, a first hydrogen outlet manifold 302, a second hydrogen outlet manifold 303, a cavity 304, a water diversion outlet 305, a first baffle 306, a second baffle 307, a third baffle 308, and a first water outlet, the first hydrogen outlet manifold 302 is connected with the first hydrogen outlet 102, the second hydrogen outlet manifold 303 is connected with the second hydrogen outlet 202, the water diversion outlet 305 is disposed at the top of the housing 301, the first baffle 306 extends inward from the top of the housing 301, the second baffle 307 extends inward from the sidewall of the housing 301, the third baffle 308 is disposed in the cavity 304, and one end of the third baffle 308 is connected with the inner end of the second baffle 307, the extending direction of the first baffle 306, the extending direction of the second baffle 307 and the extending direction of the third baffle 308 form an acute angle, and the first drain port is arranged at the bottom of the shell 301.

Specifically, the first cell stack 100 is located at the top, the second cell stack 200 is located at the bottom, and the first cell stack 100 at the top and the second cell stack 200 at the bottom are connected in parallel to form a double stack. The integrated structure 300 is provided with a cavity 304 structure, is positioned on the sides of the first hydrogen outlet 102 and the second hydrogen outlet 202, and is communicated with the first hydrogen outlet 102 of the first top stack 100 through a first top hydrogen outlet manifold 302; and the hydrogen outlet manifold II 303 at the bottom is communicated with the hydrogen outlet port II 202 of the stack II 200 at the bottom.

Optionally, a space between the lower portion of the housing 301 and the first water outlet is tapered to form a first liquid storage cavity. This kind of structure of this embodiment can guarantee when the liquid level slope or rock, weakens liquid level center variation amplitude.

Preferably, the first baffle 306 extends in a vertical direction. Further, the second baffle 307 and the third baffle 308 are connected at both ends in the width direction, and the middle part in the width direction is provided with an opening shape to form a second water outlet. The water outlet II is communicated with the liquid storage cavity I, and liquid water is finally discharged through the water outlet I.

Further, a second liquid storage cavity is formed between the second baffle 307 and the third baffle 308. Specifically, the second liquid storage cavity is also conical, and the structure can ensure that the variation amplitude of the liquid level center is weakened when the liquid level inclines or shakes. Preferably, the first hydrogen outlet manifold 302 is disposed obliquely upward from the inside of the housing 301. The second hydrogen outlet manifold is disposed obliquely upward from the inside of the housing 301. More preferably, the axis of the first hydrogen outlet manifold 302 is parallel to the axis of the second hydrogen outlet manifold 303. The first hydrogen outlet manifold and the second hydrogen outlet manifold have the same inclination angle and are downward, so that the hydrogen flow distribution of the first top galvanic pile 100 and the second bottom galvanic pile 200 is uniform, and the liquid water discharged from the galvanic piles can be smoothly discharged to the first liquid storage cavity. The first hydrogen outlet manifold and the second hydrogen outlet manifold are both in communication with the cavity 304, and the cavity 304 functions as follows: the gas flows of the top hydrogen outlet manifold I and the bottom hydrogen outlet manifold II are communicated and mixed, so that the extra flow resistance caused by the far path between the hydrogen outlet II 202 and the water distribution outlet 305 of the bottom electric pile II 200 can be compensated, and the flow distribution uniformity of the double piles can be improved.

Optionally, the end of the inner end of the second baffle 307 is lower than the corresponding end of the second baffle 307. The structure can ensure that the airflow of the hydrogen outlet I102 of the top galvanic pile I100 does not directly flow through the area and forms a vortex, and a local low-pressure area is generated, so that the water in the secondary liquid storage cavity is smoothly discharged.

The working principle of the fuel cell water diversion and storage integrated device of the embodiment is as follows:

after the gas-liquid mixture is mixed in the cavity 304, the gas-liquid mixture flows along the baffle plate III 308 to be deflected, and primary gas-liquid separation is carried out due to the gravity action of liquid drops. Similarly, when the liquid continuously flows through the first baffle 306 and turns, secondary gas-liquid separation occurs, and the separated liquid drops are gathered and accumulated in the second conical liquid storage cavity formed by the second baffle 307 and the third baffle 308. A water outlet II is arranged in the liquid storage cavity II and is communicated with the liquid storage cavity I, and liquid water is finally discharged through the water outlet I. Whole air current flows and is located the top of device, keeps away from the liquid level, avoids the liquid level to rock the influence to the gas-liquid separation effect, and the gas-liquid separation effect is stable. The secondary gas-liquid separation contributes to improving the gas-liquid separation efficiency.

The embodiment also provides a fuel cell system which comprises the fuel cell water diversion and storage integrated device.

The fuel cell integrated device and fuel cell system that divide water and store up that this embodiment provided is applicable to the hydrogen outlet manifold of two piles, divides water, the water storage integrated device, has guaranteed about pile flow uniformity, and about pile intercommunication mode is simple, and whole air current flows and is located the device top, keeps away from the liquid level, avoids the liquid level to rock the influence to the gas-liquid separation effect, and the gas-liquid separation effect is stable. The secondary gas-liquid separation contributes to improving the gas-liquid separation efficiency.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A fuel cell water dividing and storing integrated device is characterized by comprising a first electric pile (100), a second electric pile (200) and an integrated structure (300), wherein the first electric pile (100) is provided with a first hydrogen inlet (101) and a first hydrogen outlet (102), the second electric pile (200) is provided with a second hydrogen inlet (201) and a second hydrogen outlet (202), the integrated structure (300) comprises a shell (301), a first hydrogen outlet manifold (302), a second hydrogen outlet manifold (303), a cavity (304), a water dividing outlet (305), a first baffle (306), a second baffle (307), a third baffle (308) and a first water outlet (309), the first hydrogen outlet manifold (302) is connected with the first hydrogen outlet (102), the second hydrogen outlet manifold (303) is connected with the second hydrogen outlet (202), and the water dividing outlet (305) is arranged at the top of the shell (301), the first baffle (306) extends towards the inside from the top of the shell (301), the second baffle (307) extends towards the inside from the side wall of the shell (301), the third baffle (308) is arranged in the cavity (304), one end of the third baffle (308) is connected with the inner end of the second baffle (307), the extending direction of the first baffle (306) is acute-angled with the extending direction of the second baffle (307) and the extending direction of the third baffle (308), and the first drain outlet (309) is arranged at the bottom of the shell (301).

2. The integrated water diversion and storage device of a fuel cell as claimed in claim 1, wherein a space between the lower part of the housing (301) and the first water outlet (309) is tapered to form a first liquid storage cavity (311).

3. The integrated water diversion and storage device of claim 1, wherein the first baffle (306) extends in a vertical direction.

4. The fuel cell water dividing and storing integrated device as claimed in claim 3, wherein the second baffle (307) is connected with the third baffle (308) at two ends along the width direction, and the middle part along the width direction is arranged in an open shape to form a second water outlet (310).

5. The integrated water diversion and storage device of claim 4 wherein a second reservoir (312) is formed between the second baffle (307) and the third baffle (308).

6. The integrated water diversion and storage device of claim 3 wherein said first hydrogen outlet manifold (302) is disposed obliquely upward from inside said housing (301).

7. The fuel cell water splitting and storing integrated device as recited in claim 6, wherein the second hydrogen outlet manifold is disposed obliquely upward from the inside of the housing (301).

8. The integrated water diversion and storage device of claim 7 wherein an axis of said first hydrogen outlet manifold (302) is parallel to an axis of said second hydrogen outlet manifold (303).

9. The integrated fuel cell water splitting and storing device of claim 4, wherein the end of the inner end of the second baffle plate (307) is lower than the corresponding end of the second baffle plate (307).

10. A fuel cell system comprising the fuel cell water diversion and storage integration apparatus according to any one of claims 1 to 9.