CN217955923U

CN217955923U - Fuel cell drainage system and vehicle

Info

Publication number: CN217955923U
Application number: CN202221050933.8U
Authority: CN
Inventors: 王琨; 苗佩宇; 张潇丹; 方川
Original assignee: Beijing Sinohytec Co Ltd
Current assignee: Beijing Sinohytec Co Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-12-02
Anticipated expiration: 2032-05-05

Abstract

The utility model relates to the technical field of fuel cells, in particular to a fuel cell drainage system and a vehicle, wherein the system comprises a controller, a water separator, a drain valve and an induction assembly, a water tank is arranged in the water separator, and the bottom of the water tank is communicated with the drain valve; the induction assembly comprises a light source and a photoresistor, the light source and the photoresistor are respectively arranged on the side walls of the water tank, which are opposite to each other, and the light source and the photoresistor are positioned on different horizontal planes; the controller controls the opening of the drain valve according to the photoresistor; the beneficial effects of the utility model reside in that: when the water separator drains water, the liquid level gradually drops, when the liquid level reaches the liquid seal threshold value of the drain valve, the light emitted by the light source greatly drops the resistance value of the photoresistor due to the refraction of light, the drain valve is closed at the moment, and the front end of the drain valve is still partially liquid water for liquid seal, so that the phenomenon of gas exhaust is avoided.

Description

Fuel cell drainage system and vehicle

Technical Field

The utility model relates to a fuel cell technical field, concretely relates to fuel cell drainage system and vehicle.

Background

A fuel cell is a device that can directly convert chemical energy stored in chemical substances into electrical energy through an electrochemical reaction. The fuel cell has the advantages of high energy conversion efficiency, cleanness, no pollution, diversified fuel sources and the like. Therefore, the fuel cell receives a wide attention.

In the power generation process of the fuel cell, water is generated in a hydrogen path, and liquid water needs to be separated and discharged through a water separator, so that the opening time and the period of a water discharge valve need to be determined, but along with the performance reduction of the electric pile, the water quantity of the hydrogen path is reduced, and the inevitable gas discharge during the water discharge of the water separator influences the performance of an engine.

The above technical problems are overcome in the prior art by the following two ways:

firstly, replacing a cover plate of the water separator with a transparent cover plate, and determining the time for not discharging backflow gas while completely discharging liquid water on the anode side through visual inspection to determine the opening time of a drain valve;

firstly, collecting hydrogen spraying parameters, and identifying whether the state of a drain valve has the possibility of one field by a controller, wherein if the state of the drain valve does not exist, the drain valve is normal; if the abnormality is possible, further analyzing the fluctuation quantity of the hydrogen injection parameter, and judging the state of the hydrogen discharge valve; if the fluctuation amount of the hydrogen spraying parameter is higher than the first threshold value when the hydrogen discharge valve is opened, judging that the drain valve exhausts, otherwise, judging that the drain valve is normal; and if the fluctuation amount of the hydrogen spraying parameter is higher than the second threshold value when the hydrogen discharge valve is closed, judging that the water discharge valve discharges the gas, otherwise, judging that the water discharge valve is normal. ( Taking out: automatic monitoring device for fuel cell engine drain valve and calibration method thereof, patent application No.: 202110954927.9 )

However, the prior art still has the following defects:

the first technical scheme needs to customize the transparent cover plate of the water separator, so that the cost is high and the manufacturing period is long;

the first technical scheme needs to increase the test and calibrate the opening time and the period of the drain valve, so that the time cost is high; and along with the operation of the galvanic pile, the performance of the galvanic pile is reduced, the amount of the liquid water of the anode separated from the water separator in the same time is reduced, and if the opening time of the drainage valve is not changed, backflow gas is inevitably discharged when the drainage valve is opened, so that the performance of an engine is influenced, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that: a fuel cell drain system and a vehicle are provided in which the disadvantage of gas discharge during draining is avoided by a method of liquid-sealing by retaining a small amount of water at the front end of a drain valve.

In order to solve the technical problem, the utility model discloses a first technical scheme be:

a fuel cell drainage system comprises a controller, a water separator, a drainage valve and a sensing assembly, wherein a water tank is arranged in the water separator, and the bottom of the water tank is communicated with the drainage valve;

the induction component comprises a light source and a photoresistor, the light source and the photoresistor are respectively arranged on the side walls of the water tank, which are opposite to each other, and the light source and the photoresistor are positioned on different horizontal planes;

the controller controls the opening of the drain valve according to the photoresistor.

In order to solve the technical problem, the utility model discloses a second kind technical scheme be:

a control method of the above-mentioned fuel cell drain system,

and judging whether the liquid level of the water tank in the water separator meets the discharge requirement, if not, stopping the operation, if so, discharging, judging whether the photoresistor is irradiated in the discharge process, otherwise, continuing to discharge, and if so, stopping the discharge.

In order to solve the above technical problem, the utility model discloses a third kind technical scheme be:

a vehicle comprises the fuel cell drainage system.

The beneficial effects of the utility model reside in that: when the liquid level of the liquid water in the water separator is higher than the liquid seal threshold value of the drain valve, the laser drop point emitted by the light source is positioned above or below the photosensitive resistor, the resistance value of the photosensitive resistor is the largest, when the water separator drains water, the liquid level gradually drops, when the liquid level reaches the liquid seal threshold value of the drain valve, the resistance value of the photosensitive resistor is greatly reduced by light emitted by the light source due to refraction of light, the drain valve is closed at the moment, partial liquid water is still arranged at the front end of the drain valve for liquid seal, the phenomenon of gas exhaust is guaranteed not to occur, calibration tests of the opening time and the period of the drain valve can be omitted, and development time is saved; and a transparent cover plate is not required to be installed, so that the research and development time is saved, backflow gas can be prevented from being discharged when the drain valve is opened, and the cost is reduced.

Drawings

FIG. 1 is a partial schematic view of a fuel cell drainage system according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial operation state of a fuel cell drainage system according to an embodiment of the present invention.

Detailed Description

In order to explain the technical contents, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 and 2, a fuel cell drainage system includes a controller, a water separator, a drainage valve and a sensing assembly, wherein the water separator has a water tank therein, and the bottom of the water tank is communicated with the drainage valve;

the induction assembly comprises a light source and a photoresistor, the light source and the photoresistor are respectively arranged on the side walls of the water tank, which are opposite to each other, and the light source and the photoresistor are positioned on different horizontal planes;

From the above description, it can be known that, by locating the light source and the photoresistor on different horizontal planes, when the liquid level of the liquid water in the water separator is higher than the liquid seal threshold of the drain valve, the laser drop point emitted by the light source is located above or below the photoresistor (as shown in the left figure in fig. 2 as an upper technical scheme, and the following description is based on the technical scheme of fig. 2), at this time, the resistance value of the photoresistor is the largest, when the water separator drains water, the liquid level gradually drops, when the liquid level reaches the liquid seal threshold of the drain valve, the resistance value of the photoresistor drops greatly due to the light emitted by the light source due to refraction of light, at this time, the drain valve is closed, and the front end of the drain valve still has part of liquid water to be subjected to liquid seal, so that no gas discharge phenomenon occurs, calibration tests of the opening time and period of the drain valve can be omitted, and development time can be saved; and a transparent cover plate is not required to be installed, the research and development time is saved, backflow gas can be prevented from being discharged when the drain valve is opened, and the cost is reduced.

Furthermore, an upper liquid level sensor is also arranged in the water separator, and the upper liquid level sensor is positioned in the water tank and above the horizontal plane where the light source and the photoresistor are positioned;

the controller controls the opening of the drain valve according to the upper liquid level sensor.

From the above description, through adding the liquid level sensor, when triggering the water knockout drum drainage (discharge threshold), the liquid level descends gradually, and the action of closing the drain valve is controlled by the response subassembly.

Further, a lower liquid level sensor is arranged in the water tank, and the lower liquid level sensor is arranged between the light source and the horizontal plane where the photoresistor is located;

the lower liquid level sensor is electrically connected with the controller, and the controller controls the opening of the drain valve according to the lower liquid level sensor.

From the above description, it can be known that the liquid level sensor is arranged, and the lower liquid level sensor is arranged to correspond to the liquid seal threshold position, so that enough water can be reserved in the water tank, and liquid seal is realized.

Further, the controller controls the opening time of the drain valve according to the time difference triggered by the upper liquid level sensor and the lower liquid level sensor.

As can be seen from the above description, since the time difference between the triggering of the upper level sensor and the lower level sensor can be used to detect a change in the liquid level, the light-sensitive resistor can be compensated for, or secured, in this way, if no accurate illumination occurs due to vehicle fluctuations, i.e. the triggering time difference is the length of time for which the drain valve is open.

Furthermore, the horizontal plane of the light source is lower than the photoresistor, and the falling point of the light source emitting line is located on the side wall of the water tank above the photoresistor.

From the above description, the light source does not directly irradiate the photoresistor, and when the liquid level in the water separator drops to the preset liquid seal threshold value, the ray is refracted, so that the ray drop point is positioned on the photoresistor and fed back to the controller, and the controller controls the water discharge valve to be closed.

Further, the light source is a laser transmitter.

Example one

An upper liquid level sensor is also arranged in the water separator, and the upper liquid level sensor is positioned in the water tank and above the horizontal plane where the light source and the photoresistor are positioned;

The horizontal plane of the light source is lower than the photoresistor, and the falling point of the light source emission line is located on the side wall of the water tank above the photoresistor.

The light source is a laser transmitter.

Example two

A fuel cell drainage system, the same as the first embodiment will not be described again, wherein

A lower liquid level sensor is also arranged in the water tank, and the lower liquid level sensor is arranged between the light source and the horizontal plane where the photosensitive resistor is positioned;

the lower liquid level sensor is electrically connected with the controller, and the controller controls the opening of the drainage valve according to the lower liquid level sensor.

And the controller controls the opening time of the drain valve according to the time difference triggered by the upper liquid level sensor and the lower liquid level sensor.

EXAMPLE III

A method of controlling a drain system of a fuel cell according to the first or second embodiment,

The liquid level of the water tank in the water separator comprises a discharge threshold value and a liquid seal threshold value;

and calculating the triggering time difference between the discharge threshold and the liquid seal threshold, and calculating the discharge time according to the triggering time difference.

Example four

A vehicle comprising the fuel cell drain system according to any one of the first embodiment or the second embodiment.

The above mentioned is only the embodiment of the present invention, and the patent scope of the present invention is not limited thereby, and all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. A fuel cell drainage system is characterized by comprising a controller, a water separator, a drain valve and a sensing assembly, wherein a water tank is arranged in the water separator, and the bottom of the water tank is communicated with the drain valve;

2. The fuel cell drainage system of claim 1, wherein an upper liquid level sensor is further disposed in the water separator, and the upper liquid level sensor is located in the water tank and above a horizontal plane where the light source and the photoresistor are located;

3. The fuel cell drain system of claim 2, wherein a lower level sensor is further disposed within the water tank, the lower level sensor being positioned between the light source and a horizontal surface at which the light dependent resistor is positioned;

4. The fuel cell drain system according to claim 3, wherein the controller controls the opening time of the drain valve according to a time difference between the triggering of the upper level sensor and the lower level sensor.

5. The fuel cell drain system of claim 1, wherein the light source is located at a level lower than the light-sensitive resistor, and the point at which the light source emits light is located on the side wall of the water tank above the light-sensitive resistor.

6. The fuel cell drain system of claim 1, wherein the light source is a laser transmitter.

7. A vehicle characterized by comprising the fuel cell drain system according to any one of claims 1 to 6.