CN211929626U - Hydrogen fuel cell automobile oxygen system - Google Patents
Hydrogen fuel cell automobile oxygen system Download PDFInfo
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- CN211929626U CN211929626U CN202020272129.9U CN202020272129U CN211929626U CN 211929626 U CN211929626 U CN 211929626U CN 202020272129 U CN202020272129 U CN 202020272129U CN 211929626 U CN211929626 U CN 211929626U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a hydrogen fuel cell car oxygen system, including main oxygen suppliment return circuit and supplementary oxygen suppliment return circuit: the main oxygen supply loop is formed by sequentially connecting an air filter, an air flow meter, an air compressor, an air condenser, a first electromagnetic valve, a second electromagnetic valve and an air humidifier, wherein the air humidifier is provided with an air inlet and an air outlet, the air inlet is used for being connected with a cathode inlet of the hydrogen fuel cell, and the air outlet is used for being connected with a cathode outlet of the hydrogen fuel cell; the auxiliary oxygen supply loop comprises a gas storage device, the gas storage device is arranged between the first electromagnetic valve and the second electromagnetic valve, the gas inlet end of the gas storage device is communicated with the first electromagnetic valve through a pipeline, and the first output end of the gas storage device is provided with a third electromagnetic valve which is communicated with the second electromagnetic valve.
Description
Technical Field
The utility model relates to a hydrogen fuel cell car technical field especially relates to a hydrogen fuel cell car oxygen system.
Background
The hydrogen fuel cell automobile is an energy-saving pollution-free zero-emission novel automobile, the performance and the price of the traditional storage battery cannot meet the practical requirements of the electric automobile, the fuel cell is a device for directly converting chemical energy of hydrogen and oxygen into electric energy through electrode reaction, the energy conversion efficiency is high, and the hydrogen fuel cell automobile is considered as an ideal driving power supply on the electric automobile in future.
The oxygen supply system of the hydrogen fuel cell automobile is mainly used for supplying oxygen to the hydrogen energy battery system, but the oxygen supply system in the prior art has the problem of gas supply lag, and the gas supply lag of the oxygen supply system can directly cause the output power response lag of the hydrogen fuel cell system, so that the power performance of the hydrogen fuel cell automobile is weakened, and the normal use of the hydrogen fuel cell automobile is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a hydrogen fuel cell car oxygen system and control method thereof.
The utility model provides a hydrogen fuel cell car oxygen system, including main oxygen suppliment return circuit and supplementary oxygen suppliment return circuit:
the main oxygen supply loop is formed by sequentially connecting an air filter, an air flow meter, an air compressor, an air condenser, a first electromagnetic valve, a second electromagnetic valve and an air humidifier, wherein the air humidifier is provided with an air inlet and an air outlet, the air inlet is used for being connected with a cathode inlet of the hydrogen fuel cell, and the air outlet is used for being connected with a cathode outlet of the hydrogen fuel cell;
the auxiliary oxygen supply loop comprises an air storage device, the air storage device is arranged between the first electromagnetic valve and the second electromagnetic valve, the air inlet end of the air storage device is communicated with the first electromagnetic valve through a pipeline, and the first output end of the air storage device is provided with a third electromagnetic valve which is communicated with the second electromagnetic valve;
the first solenoid valve is used for controlling the oxygen delivery path, the second solenoid valve is used for controlling the one-way flow direction of oxygen, the gas storage device is used for storing oxygen, and the third solenoid valve is used for controlling the oxygen supply device.
Further, an air pressure sensor is arranged in the air storage device and electrically connected with the air compressor controller so as to be used for detecting air pressure in the air storage device.
Furthermore, a pressure release valve is arranged at the second output end of the gas storage device.
Further, the gas storage device is a gas storage tank.
Further, the first electromagnetic valve is a controllable three-way electromagnetic valve.
Further, the second electromagnetic valve is a one-way three-way valve.
Further, the third electromagnetic valve is a proportional control electromagnetic valve.
A control method of the hydrogen fuel cell automobile oxygen supply system mainly comprises the following steps:
s1, firstly, after a fuel cell starting command and a request power sent by a VCU control system are collected by the FCU control system, then an air compressor rotating speed database corresponding to response power, an oxygen supply amount database corresponding to response power and an oxygen supply amount proportional control solenoid valve opening degree database corresponding to oxygen supply amount are called by the FCU control system, and meanwhile, a gas pressure P value in the gas storage device is measured;
s2, controlling an electromagnetic valve opening database according to the response power corresponding air compressor rotating speed database, the response power corresponding oxygen supply amount database and the oxygen supply amount corresponding proportion, acquiring target rotating speed information of the air compressor and opening information of a third electromagnetic valve, adjusting the rotating speed of the air compressor to the target rotating speed, and controlling the opening of the third electromagnetic valve;
s3, starting the FCU to start the timer, and calling an FCU stop timing database and a first electromagnetic valve timing and conducting database through the FCU control system to control the first electromagnetic valve to be communicated with the auxiliary oxygen supply loop;
s4, when the timing of the FCU starting timer reaches 10S, conducting the database according to the FCU stopping timing database and the timing of the first electromagnetic valve, controlling the first electromagnetic valve to be communicated with the main oxygen supply loop by using the FCU control system, and closing the third electromagnetic valve;
s5, when the third electromagnetic valve is closed, calling a response power corresponding air compressor rotation speed database through the FCU control system to obtain the target rotation speed of the air compressor, and supplying oxygen to the hydrogen fuel cell through the main oxygen supply loop;
s6, when the value of the gas pressure P in the S1 is smaller than the lowest value of the gas pressure in the gas storage device, repeating the operation of S3;
after the S7 and the auxiliary oxygen supply loop are communicated, the FCU control system calls an oxygen storage amount database required by the gas pressure corresponding to the gas storage device and an oxygen supply amount database corresponding to the response power, and the gas pressure P value in the S6 is combined to respectively obtain the oxygen supply amount required by the hydrogen fuel cell when the hydrogen fuel cell is started and the oxygen storage amount required by the gas storage device;
s8, according to the oxygen supply amount needed when the hydrogen fuel cell is started and the oxygen storage amount needed by the air storage device in the S7, combining the air compressor rotating speed database corresponding to the response power and the air compressor rotating speed database corresponding to the oxygen storage amount needed by the air storage device to obtain the total target rotating speed of the air compressor, so as to supplement oxygen to the air storage device and supply oxygen to the hydrogen fuel cell, and meanwhile, according to the corresponding proportion of the oxygen supply amount, controlling the electromagnetic valve opening database and controlling the opening of the third electromagnetic valve;
and S9, returning to S2 and repeating S2-S5 if the value of the gas pressure P in S1 is larger than the maximum value of the gas pressure in the gas storage device.
The utility model provides a beneficial effect that technical scheme brought is: (1) the utility model provides a hydrogen fuel cell car oxygen system, two oxygen supply loops have been designed, and under the effect of first solenoid valve, main oxygen supply loop and supplementary oxygen supply loop can switch over, so that under the environment that the oxygen suppliment is not enough, provide sufficient oxygen to hydrogen fuel cell pile through supplementary oxygen supply loop, can effectively solve among the prior art because the oxygen supply system delays the problem that the oxygen suppliment leads to hydrogen fuel cell car dynamic property to weaken, guarantee the oxygen suppliment in time and the oxygen suppliment is sufficient, still can avoid simultaneously supplying the too high waste of energy that leads to of oxygen suppliment, can also improve the energy rate of interest efficiency of system;
(2) a control method of hydrogen fuel cell car oxygen system, opening or disconnection of the sensitive control main oxygen suppliment return circuit of its accessible control command and supplementary oxygen suppliment return circuit, in addition, can also realize the replenishment to gas storage device oxygen, have advantages such as the response is fast, control is sensitive and simple and easy.
Drawings
FIG. 1 is a schematic structural diagram of an oxygen supply system for a hydrogen fuel cell vehicle according to the present invention;
fig. 2 is a flow chart of a control method of the oxygen supply system of the hydrogen fuel cell vehicle of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides an oxygen supply system for a hydrogen fuel cell vehicle, including an air cleaner 10, an air flow meter 20, an air compressor 30, an air condenser 40, an air humidifier 50, a first electromagnetic valve 60, a second electromagnetic valve 70, and an auxiliary oxygen supply loop, where the air cleaner 10, the air compressor 30, the air condenser 40, and the air humidifier 50 are sequentially communicated through a pipeline, the air humidifier 50 is provided with an air inlet (not shown) and an air outlet (not shown), the air inlet is used to connect with a cathode inlet of a hydrogen fuel cell, the air outlet is used to connect with a cathode outlet of the hydrogen fuel cell, the pipeline through which the air condenser 40 and the humidifier are communicated is respectively provided with the first electromagnetic valve and the second electromagnetic valve 70, the first solenoid valve 60 and the second solenoid valve 70 are respectively distributed at intervals along the oxygen conveying direction, the auxiliary oxygen supply loop comprises an air storage device 80, the air storage device 80 is arranged between the first solenoid valve 60 and the second solenoid valve 70, the air inlet end of the air storage device is communicated with the first solenoid valve 60 through a pipeline, the first output end of the air storage device is communicated with the second solenoid valve 70 through a pipeline, a third solenoid valve 90 is arranged on the pipeline for communicating the first output end of the air storage device 80 with the second solenoid valve 70, a pressure release valve 100 is arranged at the second output end of the air storage device 80, an air pressure sensor 81 is arranged in the air storage device 80, the air pressure sensor 81 is electrically connected with the controller of the air compressor 30, wherein the first solenoid valve 60 is used for controlling the conveying path of oxygen, the second solenoid valve 70 is used for controlling the unidirectional flow direction of oxygen, and the air storage device 80 is used, the third solenoid valve 90 is used to control the amount of oxygen supplied, and the air pressure sensor 81 detects the air pressure in the air storage device 80 and sends a signal to the controller of the air compressor 30.
In the utility model, the oxygen supply system of the present invention designs two oxygen supply loops, namely, a main oxygen supply loop composed of the air filter 10, the air flow meter 20, the air compressor 30, the air condenser 40, the first solenoid valve 60, the second solenoid valve 70 and the air humidifier 50, and an auxiliary oxygen supply loop composed of the air filter 10, the air flow meter 20, the air compressor 30, the air condenser 40, the first solenoid valve 60, the air storage device 80, the third solenoid valve 90, the second solenoid valve 70 and the air humidifier 50, and under the action of the first solenoid valve 60, the main oxygen supply loop and the auxiliary oxygen supply loop can be switched, so that under the insufficient environment, such as when the air compressor 30 just starts working and cannot instantly provide enough oxygen, or the automobile runs under the insufficient oxygen environment such as plateau, the sufficient oxygen is provided to the hydrogen fuel cell stack through the auxiliary oxygen supply loop, the problem that the power performance of a hydrogen fuel cell automobile is weakened due to delayed oxygen supply of an oxygen supply system in the prior art can be effectively solved, the oxygen supply is ensured to be timely and sufficient in oxygen supply amount, meanwhile, the waste of energy caused by overhigh oxygen supply amount can be avoided, and the energy utilization rate efficiency of the system can be improved. The first electromagnetic valve 60 is a controllable three-way electromagnetic valve which can timely control the opening of the auxiliary oxygen supply loop and the main oxygen supply loop, so that the added auxiliary oxygen supply gas circuit is simple and easy to implement, wherein the first electromagnetic valve 60 is provided with a first communication end, a second communication end and a third communication end, when the first communication end and the third communication end are synchronously opened, the main oxygen supply loop is communicated, and when the first communication end and the second communication end are synchronously opened, the auxiliary oxygen supply loop is communicated; the second electromagnetic valve 70 is a one-way three-way valve, which can ensure that the gas in the main oxygen supply loop and the auxiliary oxygen supply loop can only directly flow into the air humidifier 50 in one way, and does not flow back to the air compressor 30 and the air storage device 80; the gas storage device 80 is a gas storage tank; the pressure relief valve 100 is a mechanical pressure relief valve 100, which can adjust the pressure relief threshold of the auxiliary oxygen supply loop according to different air pressure requirements, so as to improve the transportability and universality of the auxiliary oxygen supply loop, and meanwhile, the mechanical air pressure relief valve 100 can prevent the over-high air pressure of the air storage device 80 caused by improper control, thereby solving the problem of over-load of the oxygen supply air compression system and improving the stability and safety of the auxiliary whole oxygen supply system. The third electromagnetic valve 90 is a proportional control electromagnetic valve, which is 4WRaE6E1-15-2X, and can adjust the opening value according to the oxygen demand of the hydrogen fuel cell system, so as to control the supply of oxygen, ensure that the supply of oxygen is not too low, ensure that the supply of oxygen does not lead to excessive energy waste, and improve the energy efficiency of the system. After the air pressure sensor 81 sends the detection signal to the controller of the air compressor 30, the controller of the air compressor 30 is in communication connection with the FCU control system through the CAN communication network. Here, it should be noted that the present invention does not relate to the improvement of the structures of the air cleaner 10, the air flow meter 20, the air compressor 30, the air condenser 40 and the air humidifier 50, and the air cleaner 10, the air flow meter 20, the air compressor 30, the air condenser 40 and the air humidifier 50 of the hydrogen fuel cell vehicle can be taken as specific embodiments in the prior art.
Referring to fig. 2, a method for controlling an oxygen supply system of a hydrogen fuel cell vehicle mainly includes the following steps:
s1, after the FCU control system collects a fuel cell starting command sent by the VCU control system and the FCU control system sets power output, the FCU control system gives response power by combining the state of the fuel cell, respectively calls an air compressor rotating speed database corresponding to the response power, an oxygen supply amount database corresponding to the response power and an oxygen supply amount corresponding proportion control electromagnetic valve opening database, and simultaneously measures the gas pressure value in the gas storage device 80 as P; the response power corresponding air compressor rotating speed database, the response power corresponding oxygen supply amount database and the oxygen supply amount corresponding proportion control solenoid valve opening database are stored in the FCU control system, the response power corresponding air compressor rotating speed database mainly achieves the function of obtaining the compressor rotating speed corresponding to the response power according to the state of the fuel cell, similarly, the response power corresponding oxygen supply amount database mainly achieves the function of obtaining the oxygen supply amount required by starting the hydrogen fuel cell corresponding to the response power according to the state of the fuel cell, and the oxygen supply amount corresponding proportion control solenoid valve opening database mainly achieves the function of obtaining the opening information of the proportion control solenoid valve according to the oxygen supply amount required by starting the hydrogen fuel cell;
s2, obtaining a target rotating speed of the air compressor 30 according to the called response power corresponding air compressor rotating speed database, sending target rotating speed control information to the air compressor 30 through the FCU control system according to the obtained target rotating speed signal of the air compressor to control the target rotating speed of the air compressor 30, meanwhile, controlling an electromagnetic valve opening degree database according to the response power corresponding oxygen supply quantity database and the oxygen supply quantity corresponding proportion called in S1 to obtain the corresponding oxygen supply quantity required when the fuel cell is started and the corresponding proportion control electromagnetic valve opening degree information to further control the opening degree of the third electromagnetic valve 90;
s3, starting an FCU starting timer, calling an FCU stopping timing database and a first electromagnetic valve timing and conducting database by an FCU control system, conducting the database according to the first electromagnetic valve timing after the FCU starting counter is started, controlling a first communication end and a second communication end of a first electromagnetic valve 60 to be communicated by the FCU control system to be communicated with an auxiliary oxygen supply loop, wherein the FCU stopping timing database is used for timing according to the starting time of the FCU starting timer, the first electromagnetic valve timing and conducting database is used for acquiring first electromagnetic valve conducting information according to timing, and the first electromagnetic valve timing and conducting database of the FCU stopping timing database is stored in the FCU control system;
s4, when the timing of the FCU starting timer reaches 10S, conducting the database according to the FCU stopping timing database and the timing of the first electromagnetic valve, controlling the first communication end and the third communication end of the first electromagnetic valve 60 to be communicated by the FCU control system so as to communicate with the main oxygen supply loop, and closing the third electromagnetic valve 90 after the main oxygen supply loop is communicated;
s5, when the third electromagnetic valve 90 is closed, the FCU control system calls the air compressor rotating speed database corresponding to the response power to obtain the target rotating speed of the air compressor 30, and supplies oxygen to the hydrogen fuel cell through the main oxygen supply loop;
s6, when P < P1 in S1, repeating the operation of S3; wherein, P1 is the lowest value of the air pressure in the air storage device 80, when P < P1, it indicates that the amount of oxygen in the air storage device 80 is insufficient, and the following steps are required to be started to supplement oxygen in the air storage device 80;
after the S7 and the auxiliary oxygen supply loop are communicated, the FCU control system calls the database of oxygen storage amount required by the gas pressure corresponding to the gas storage device and the database of oxygen supply amount corresponding to the response power, and acquires the oxygen supply amount required for starting the hydrogen fuel cell and the oxygen storage amount required by the gas storage device in combination with the P value in S6, where it is noted that the database of oxygen storage amount required by the gas pressure corresponding to the gas storage device is stored in the FCU control system, and the main function of the FCU control system is to acquire the information of oxygen storage amount in the gas storage device 80 according to the pressure value in the gas storage device 80;
s8, according to the oxygen supply amount and the oxygen storage amount required by the air storage device in the S7, combining the air compressor rotating speed database corresponding to the response power and the air compressor rotating speed database corresponding to the oxygen storage amount required by the air storage device to respectively obtain the first target rotating speed of the air compressor 30 and the second target rotating speed of the air compressor 30 of the oxygen supply amount of the hydrogen fuel cell, adding the first target rotating speed of the air compressor 30 and the second target rotating speed of the air compressor 30 to obtain the total target rotating speed of the air compressor 30, setting the rotating speed of the air compressor 30 to the total target rotating speed by the FCU control system, so that oxygen supplement to the air storage device 80 and oxygen supply to the hydrogen fuel cell can be realized, and simultaneously controlling the electromagnetic valve opening database according to the corresponding proportion of the oxygen supply amount and controlling the opening of the third electromagnetic valve 90; the air compressor speed database corresponding to the oxygen storage amount required by the air storage device is stored in the FCU control system, and the air compressor speed database mainly achieves the function of correspondingly acquiring the air compressor speed information according to the oxygen storage amount information required by the air storage device;
s9, if P > P2 in S1, returning to S2, and repeatedly executing S2-S5; where P2 is the highest value of the air pressure in the air storage device 80, when P is P2, it indicates that the oxygen content in the air storage device 80 is sufficient, and therefore, if P > P2, the procedure of supplying oxygen to the hydrogen fuel cell is directly started without additionally supplying oxygen to the air storage device 80.
The utility model discloses in, VCU control system is according to whole car power demand and whole car state, and the whole car state here indicates the auxiliary energy state, motor drive system state and high-pressure system state, and VCU control system sends fuel cell to open to FCU control system and stops order and FCU control system and set for power output.
A control method of hydrogen fuel cell car oxygen system, opening or disconnection of the sensitive control main oxygen suppliment return circuit of its accessible control command and supplementary oxygen suppliment return circuit, in addition, can also realize the replenishment to gas storage device 80 oxygen, have advantages such as the response is fast, control is sensitive and simple and easy.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides a hydrogen fuel cell car oxygen system which characterized in that, includes main oxygen suppliment return circuit and supplementary oxygen suppliment return circuit:
the main oxygen supply loop is formed by sequentially connecting an air filter (10), an air flow meter (20), an air compressor (30), an air condenser (40), a first electromagnetic valve (60), a second electromagnetic valve (70) and an air humidifier (50), wherein the air humidifier (50) is provided with an air inlet and an air outlet, the air inlet is used for being connected with a cathode inlet of the hydrogen fuel cell, and the air outlet is used for being connected with a cathode outlet of the hydrogen fuel cell;
the auxiliary oxygen supply loop comprises an air storage device (80), the air storage device (80) is arranged between the first electromagnetic valve (60) and the second electromagnetic valve (70), the air inlet end of the air storage device is communicated with the first electromagnetic valve (60) through a pipeline, and the first output end of the air storage device is provided with a third electromagnetic valve (90) which is communicated with the second electromagnetic valve (70);
the first solenoid valve (60) is used for controlling the delivery path of oxygen, the second solenoid valve (70) is used for controlling the unidirectional flow direction of oxygen, the gas storage device (80) is used for storing oxygen, and the third solenoid valve (90) is used for controlling the supply of oxygen.
2. The system of claim 1, wherein a gas pressure sensor (81) is disposed in the gas storage device (80), and the gas pressure sensor (81) is electrically connected to the air compressor controller for detecting the gas pressure in the gas storage device (80).
3. The oxygen supply system of hydrogen fuel cell vehicle as claimed in claim 1, wherein a pressure relief valve (100) is provided at the second output end of the gas storage device (80).
4. The oxygen supply system of a hydrogen fuel cell vehicle as claimed in any one of claims 1-3, wherein the gas storage device (80) is a gas storage tank.
5. The oxygen supply system for hydrogen fuel cell vehicle as claimed in claim 1, wherein said first solenoid valve (60) is a controllable three-way solenoid valve.
6. The system of claim 1, wherein the second solenoid valve (70) is a one-way three-way valve.
7. The oxygen supply system for hydrogen fuel cell vehicle as claimed in claim 1, wherein said third electromagnetic valve (90) is a proportional control electromagnetic valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020272129.9U CN211929626U (en) | 2020-03-07 | 2020-03-07 | Hydrogen fuel cell automobile oxygen system |
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| CN202020272129.9U CN211929626U (en) | 2020-03-07 | 2020-03-07 | Hydrogen fuel cell automobile oxygen system |
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