CN217507406U

CN217507406U - Device for measuring air humidity of fuel cell

Info

Publication number: CN217507406U
Application number: CN202220731259.3U
Authority: CN
Inventors: 姜波; 刘国庆; 王聪康; 徐加忠; 崔洪坡
Original assignee: Suzhou Foresight Energy Technology Co ltd
Current assignee: Suzhou Foresight Energy Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-27
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to a device for measuring fuel cell air humidity, which comprises a housin, be provided with air inlet and gas outlet on the casing, form the separation cavity between air inlet and the gas outlet, be provided with main baffle in the separation cavity, main baffle separates the separation cavity for first cavity and second cavity, first cavity is located the top of second cavity, the inlet end of first cavity and second cavity all is linked together with the air inlet, the end of giving vent to anger of first cavity and second cavity all is linked together with the gas outlet, first cavity internal connection has baffle subassembly, it is provided with the outage to be close to baffle subassembly department on the main baffle, outage and second cavity are linked together, the end of giving vent to anger of first cavity is connected with humidity transducer. The utility model discloses can accurate measurement get into fuel cell's air humidity.

Description

Device for measuring air humidity of fuel cell

Technical Field

The utility model belongs to the technical field of the fuel cell technique and specifically relates to indicate a device for measuring fuel cell air humidity.

Background

Fuel cells generate electrical energy by an electrochemical reaction between a fuel and an oxidant. Many fuel cells use a gaseous fuel (e.g., hydrogen) and a gaseous oxidant (e.g., oxygen), with air typically being used as the source of the oxidant, and hydrogen and oxygen reacting to produce water. The hydrogen fuel cell needs to be operated under a good working condition, and related parameters of hydrogen, air and a water circuit need to be controlled, and particularly, the water vapor content in the air entering the cell system needs to be effectively controlled.

In the prior art, a humidity sensor is usually used for measuring the humidity of air entering a battery system, a humidity sensitive resistor is generally used for collecting the humidity of the existing humidity sensor, a substrate is covered with a layer of film made of a humidity sensitive material, and when water vapor in the air is adsorbed on the humidity sensitive film, the resistivity and the resistance of the humidity sensitive resistor can be changed, so that the humidity measurement is realized.

The fuel cell needs both gaseous water-vapor and liquid water, so that the air entering the fuel cell needs to pass through the humidifier first, so that the air contains part of liquid water, but the part of liquid water is attached to the humidity sensing material of the humidity sensor when flowing, so that the resistivity and the resistance of the humidity sensitive resistor maintain a fixed value, the humidity reading of the humidity sensor is 100%, and the humidity value (the content of gaseous water contained in the air) of the air entering the fuel cell cannot be accurately measured.

The existing humidity measuring device cannot accurately measure the humidity of air entering the fuel cell and cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved in the present invention is to overcome the defect that the humidity measuring device in the prior art cannot accurately measure the humidity of the air entering the fuel cell.

In order to solve the technical problem, the utility model provides a device for measuring the air humidity of a fuel cell, which comprises a shell, the shell is provided with an air inlet and an air outlet, a separation chamber is formed between the air inlet and the air outlet, a main clapboard is arranged in the separation chamber and divides the separation chamber into a first chamber and a second chamber, the first chamber is positioned above the second chamber, the air inlet ends of the first chamber and the second chamber are communicated with the air inlet, the air outlet ends of the first chamber and the second chamber are communicated with the air outlet, the first chamber is internally connected with a baffle plate component, and a liquid discharge hole is formed in the main partition plate and close to the baffle plate assembly, the liquid discharge hole is communicated with the second cavity, and the air outlet end of the first cavity is connected with a humidity sensor.

In an embodiment of the present invention, the baffle plate assembly includes a first baffle plate, a second baffle plate and a third baffle plate, the second baffle plate and the third baffle plate are both located on the same side of the first baffle plate, a first gap is formed between the first baffle plate and the second baffle plate, a second gap is formed between the first baffle plate and the third baffle plate, a third gap is formed between the second baffle plate and the third baffle plate, the third gap is located between the first gap and the second gap, and the liquid discharge hole is close to the first baffle plate.

In an embodiment of the present invention, the first baffle is V-shaped.

In an embodiment of the present invention, the drain hole is located at a V-shaped corner of the first baffle.

In an embodiment of the present invention, the second baffle and the third baffle are both arc-shaped.

In an embodiment of the present invention, the radius of the second baffle and the third baffle is the same.

In an embodiment of the present invention, the second baffle and the third baffle are symmetrically arranged with respect to a center line of the first baffle.

In an embodiment of the present invention, the first chamber is internally connected with a plurality of baffle assemblies, which are arranged in sequence from the inlet end to the outlet end of the first chamber.

In an embodiment of the present invention, the humidity sensor is detachably connected to the air outlet end of the first chamber.

In an embodiment of the present invention, the liquid discharge hole is a circular hole.

Compared with the prior art, the technical scheme of the utility model have following advantage:

a device for measuring fuel cell air humidity, can accurate measurement get into fuel cell's air humidity, also have longer life simultaneously.

Drawings

In order to make the content of the present invention more clearly understood, the present invention will be described in further detail with reference to the following embodiments of the present invention, in conjunction with the accompanying drawings.

FIG. 1 is a schematic view showing the internal structure of the device for measuring air humidity of a fuel cell according to the present invention;

FIG. 2 is a bottom view of the structure shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 1 (with the moisture sensor removed);

description reference numbers indicate: 1. a housing; 11. a housing body; 12. a cover plate; 2. an air inlet; 3. an air outlet; 4. a separation chamber; 41. a first chamber; 42. a second chamber; 43. a main partition plate; 431. a liquid discharge hole; 44. a baffle assembly; 441. a first baffle plate; 442. a second baffle; 443. a third baffle plate; 444. a first void; 445. a second void; 446. a third void; 5. a humidity sensor;

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1-3, the present embodiment relates to a device for measuring air humidity of a fuel cell, which includes a housing 1, the housing 1 is provided with an air inlet 2 and an air outlet 3, a separation chamber 4 is formed between the air inlet 2 and the air outlet 3, a main partition plate 43 is disposed in the separation chamber 4, the main partition plate 43 divides the separation chamber 4 into a first chamber 41 and a second chamber 42, the first chamber 41 is located above the second chamber 42, air inlet ends of the first chamber 41 and the second chamber 42 are both communicated with the air inlet 2, air outlet ends of the first chamber 41 and the second chamber 42 are both communicated with the air outlet 3, the first chamber 41 is internally connected with a baffle plate assembly 44, a liquid outlet 431 is disposed on the main partition plate 43 near the baffle plate assembly 44, the liquid outlet 431 is communicated with the second chamber 42, an air outlet end of the first chamber 41 is connected with a humidity sensor 5 for measuring air humidity at the air outlet end of the first chamber 41, namely measuring the content of the gaseous water in the air.

Air (containing gaseous water and liquid water) enters the air inlet 2 and then is divided into two paths, one path enters the first chamber 41, the other path enters the second chamber 42, the baffle plate assembly 44 in the first chamber 41 can block the liquid water in the air, so that the liquid water is blocked and then falls along the baffle plate assembly 44, and finally enters the second chamber 42 at the lower part through the liquid discharge hole 431, the liquid water entering the second chamber 42 can be directly taken away by the air entering the second chamber 42 and enters the air outlet 3, the air (mainly containing gaseous water) blocked and filtered by the baffle plate assembly 44 in the first chamber 41 also enters the air outlet 3 and is merged with the air output by the second chamber 42, the merged air enters the fuel cell through the air outlet 3, the merged air is provided with the liquid water again, the requirement of the fuel cell can be met, and in the above process, the humidity sensor 5 measures the humidity of the air blocked and filtered in the first chamber 41, that is, the humidity sensor 5 can accurately measure the content of gaseous water in the air without being influenced by liquid water, thereby effectively ensuring the measurement accuracy of the humidity sensor 5 on the humidity of the air entering the fuel cell and ensuring the service life of the humidity sensor 5.

The structure realizes the temporary separation of liquid water contained in the air, thereby effectively ensuring the measurement accuracy of the humidity sensor.

In one embodiment, the baffle plate assembly 44 includes a first baffle plate 441, a second baffle plate 442, and a third baffle plate 443, the second baffle plate 442 and the third baffle plate 443 are both located on the same side of the first baffle plate 441, a first gap 444 is formed between the first baffle plate 441 and the second baffle plate 442, a second gap 445 is formed between the first baffle plate 441 and the third baffle plate 443, a third gap 446 is formed between the second baffle plate 442 and the third baffle plate 443, the third gap 446 is located between the first gap 444 and the second gap 445, and the drain hole 431 is located adjacent to the first baffle plate 441.

With the above structure, a reflecting space is formed between the second and

third baffles

442, 443 and the first baffle 441, as shown in fig. 3, in which arrows indicate the air flowing direction; part of the air entering the first chamber 41 flows toward the second baffle 442 through the first gap 444 and is reflected to the first baffle 441 through the second baffle 442, so that part of the liquid water in the part of the air is blocked, meanwhile, another part of the air entering the first chamber 41 flows toward the third baffle 443 through the second gap 445 and is reflected to the first baffle 441 through the third baffle 443, so that part of the liquid water in the part of the air is blocked, and the liquid water finally blocked by the baffle assembly 44 flows into the second cavity through the drain hole 431 at the bottom, while the gaseous water in the air is light in weight and flows directly toward the outlet end of the first cavity through the third gap 446.

Referring to FIG. 3, in one embodiment, first baffle 441 is V-shaped.

In one embodiment, the drain hole 431 is located at the V-shaped corner of the first baffle 441 to facilitate rapid drainage.

In one embodiment, the second baffle 442 and the third baffle 443 are both arc-shaped, so that the air flowing through the second baffle 442 and the third baffle 443 can be reflected and hit along the tangential direction of the second baffle 442 and the third baffle 443, and the air can be reflected to the first baffle 441 at various reflection angles.

In one embodiment, the radii of the second and

third baffles

442, 443 are the same.

In one embodiment, the second and

third baffles

442 and 443 are symmetrically arranged with respect to the center line of the first baffle 441 to better ensure the liquid water blocking effect.

In one embodiment, a plurality of baffle assemblies 44 are connected to the interior of the first chamber 41, and the baffle assemblies 44 are sequentially arranged from the air inlet end to the air outlet end of the first chamber 41, so as to realize multi-stage blocking and better separate liquid water from air. For example, two baffle assemblies 44 may be provided.

In one embodiment, the humidity sensor 5 is detachably connected to the outlet end of the first chamber 41.

In one embodiment, the drain hole 431 is a circular hole, which is convenient for processing and has better drain effect.

In one embodiment, as shown in fig. 2, the housing 1 includes a housing body 11, the separation chamber 4 is located inside the main housing 1, the cover plates 12 are connected to both sides of the housing body 11 to close the gap on the housing body 11, and the main housing 1 and the cover plates 12 can be fixed by welding to ensure structural reliability.

The gas outlet 3 of the above embodiment may be connected to the gas inlet end of the fuel cell through a pipe.

The fuel cell needs liquid water and also needs gaseous water-vapor, so the performance of the fuel cell can be affected by simply removing the liquid water, which results in lower power of the fuel cell system, and the device for measuring the air humidity of the fuel cell of the above embodiment can realize the temporary separation of the liquid water in the air through the arrangement of the first cavity 41 and the second cavity 42, so that the humidity sensor 5 can accurately measure the air humidity, meanwhile, the separated liquid water finally converges into the air again to enter the fuel cell system, and the air finally entering the fuel cell system has no damage of the gaseous water and the liquid water, thereby effectively ensuring that the performance of the fuel cell is not affected.

The device for measuring the air humidity of the fuel cell of the embodiment can effectively ensure the measurement accuracy of the humidity sensor, so as to accurately measure the air humidity entering the fuel cell, avoid liquid water attached to the humidity sensor, effectively ensure the service life of the humidity sensor and reduce the maintenance cost of the humidity sensor.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims

1. An apparatus for measuring air humidity of a fuel cell, characterized by: the air inlet and the air outlet are arranged on the shell, a separation cavity is formed between the air inlet and the air outlet, a main partition board is arranged in the separation cavity, the main partition board divides the separation cavity into a first cavity and a second cavity, the first cavity is located above the second cavity, the air inlet ends of the first cavity and the second cavity are communicated with the air inlet, the air outlet ends of the first cavity and the second cavity are communicated with the air outlet, a baffle plate assembly is connected inside the first cavity, a liquid discharge hole is formed in the position, close to the baffle plate assembly, of the main partition board, the liquid discharge hole is communicated with the second cavity, and the air outlet end of the first cavity is connected with a humidity sensor.

2. The apparatus for measuring fuel cell air humidity of claim 1, characterized in that: the baffle plate assembly comprises a first baffle plate, a second baffle plate and a third baffle plate, wherein the second baffle plate and the third baffle plate are located on the same side of the first baffle plate, a first gap is formed between the first baffle plate and the second baffle plate, a second gap is formed between the first baffle plate and the third baffle plate, a third gap is formed between the second baffle plate and the third baffle plate, the third gap is located between the first gap and the second gap, and the liquid discharge hole is close to the first baffle plate.

3. The apparatus for measuring fuel cell air humidity of claim 2, characterized in that: the first baffle is V-shaped.

4. The apparatus for measuring fuel cell air humidity of claim 3, characterized in that: the liquid discharge hole is positioned at the V-shaped corner of the first baffle plate.

5. The apparatus for measuring fuel cell air humidity of claim 2, characterized in that: the second baffle and the third baffle are both arc-shaped.

6. The apparatus for measuring fuel cell air humidity of claim 5, characterized in that: the radius of the second baffle plate is the same as that of the third baffle plate.

7. The apparatus for measuring fuel cell air humidity of claim 6, wherein: the second baffle and the third baffle are symmetrically arranged relative to the center line of the first baffle.

8. The apparatus for measuring fuel cell air humidity of claim 1, characterized in that: the first chamber is internally connected with a plurality of baffle assemblies, and the baffle assemblies are sequentially arranged from the air inlet end to the air outlet end of the first chamber.

9. The apparatus for measuring fuel cell air humidity of claim 1, characterized in that: the humidity sensor is detachably connected to the air outlet end of the first cavity.

10. The apparatus for measuring fuel cell air humidity of claim 1, characterized in that: the liquid discharge hole is a round hole.