CN115498222A - Energy management method for low-power air-cooled fuel cell - Google Patents
Energy management method for low-power air-cooled fuel cell Download PDFInfo
- Publication number
- CN115498222A CN115498222A CN202211326402.1A CN202211326402A CN115498222A CN 115498222 A CN115498222 A CN 115498222A CN 202211326402 A CN202211326402 A CN 202211326402A CN 115498222 A CN115498222 A CN 115498222A
- Authority
- CN
- China
- Prior art keywords
- fuel cell
- hydrogen fuel
- hydrogen
- power
- lithium battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04604—Power, energy, capacity or load
- H01M8/04619—Power, energy, capacity or load of fuel cell stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04858—Electric variables
- H01M8/04925—Power, energy, capacity or load
- H01M8/0494—Power, energy, capacity or load of fuel cell stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04955—Shut-off or shut-down of fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Transportation (AREA)
- Computing Systems (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Evolutionary Computation (AREA)
- Fuzzy Systems (AREA)
- Medical Informatics (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a low-power air-cooled fuel cell energy management method, which comprises the following steps: building a hydrogen fuel cell calibration rack, and determining the optimal working power point P of the hydrogen fuel cell under different environments; determining the calibration opening time and the calibration closing time of a hydrogen discharge valve of the hydrogen fuel cell under different output powers according to the calibration rack of the hydrogen fuel cell; and (3) building a hydrogen fuel cell power supply system, and determining the optimal power supply strategy of the hydrogen fuel cell according to the highest working power point P and the opening and closing time of the hydrogen discharge valve under different output powers. The invention has the beneficial effects that: the fuel air-cooled fuel cell system has higher energy utilization efficiency while meeting the working requirement.
Description
Technical Field
The invention relates to the field of fuel cell energy management, in particular to a low-power air-cooled fuel cell energy management method.
Background
The hydrogen fuel cell system is used as a power generation device, has no carbon emission in the whole process, is an ideal clean energy source, and the fuel cell moped can be used as the supplement of urban traffic. In the current fuel electric secondary moped, a constant power charging mode is generally adopted, and although the whole vehicle is always in a full energy state, the fuel cell generates heat seriously in a long-term full power generation mode, and a large amount of hydrogen energy is converted into heat energy which is dissipated in the air and is not utilized.
Disclosure of Invention
In order to overcome the defect of low energy utilization rate of the conventional fuel cell system, the invention provides a low-power air-cooled fuel cell energy management method, which comprises the following steps:
s1: building a hydrogen fuel cell calibration rack, and determining the optimal working power point P of the hydrogen fuel cell in different environments;
s2: determining the calibration opening time and the calibration closing time of a hydrogen discharge valve of the hydrogen fuel cell under different output powers according to the hydrogen fuel cell calibration rack;
s3: and (3) building a hydrogen fuel cell power supply system, and determining the optimal power supply strategy of the hydrogen fuel cell according to the highest working power point P and the opening and closing time of the hydrogen discharge valve under different output powers.
The beneficial effects provided by the invention are as follows: the fuel air-cooled fuel cell system has higher energy utilization efficiency while meeting the working requirement.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to FIG. 1, FIG. 1 is a schematic flow chart of a method according to the present invention; a small-power air-cooled fuel cell energy management method comprises the following steps:
s1: building a hydrogen fuel cell calibration rack, and determining the optimal working power point P of the hydrogen fuel cell under different environments;
the step S1 specifically comprises the following steps:
s11, adding flow sensors to a hydrogen inlet valve and a hydrogen exhaust valve of the hydrogen fuel cell, and calculating the mass of hydrogen consumed by the hydrogen fuel cell according to the difference between the hydrogen inlet flow and the hydrogen exhaust flow;
s12, an adjustable load is connected to an output port of the hydrogen fuel cell, the mass of hydrogen consumed by the corresponding hydrogen fuel cell is recorded according to different load powers, the working efficiency of the hydrogen fuel cell under different load powers is obtained and is marked as f (x, n), wherein x represents the load power, n represents the working efficiency of the hydrogen fuel cell, and f represents the corresponding relation between the load power and the working efficiency of the hydrogen fuel cell; in the embodiment of the present invention, the adjustable loads may be set to 50w,150w,250w,350w,450w, etc., which are not limited herein, and those skilled in the art can select the adjustable loads according to actual situations.
S13: placing a hydrogen fuel cell in a controllable temperature box, recording the mass of hydrogen consumed by the hydrogen fuel cell under the condition of the same load power, and obtaining the working efficiency of the hydrogen fuel cell at different temperatures, and recording the working efficiency as g (y, n), wherein y represents the ambient temperature, n represents the working efficiency of the hydrogen fuel cell, and g represents the corresponding relation between the ambient temperature and the working efficiency of the hydrogen fuel cell;
s14: obtaining h (x, y) according to f (x, n) and g (y, n), wherein h represents the corresponding relation between the ambient temperature and the working power of the hydrogen fuel cell;
s15: obtaining the optimal working power point P of the hydrogen fuel cell under different ambient temperatures according to h (x, y);
s2: determining the calibration opening time and the calibration closing time of a hydrogen discharge valve of the hydrogen fuel cell under different output powers according to the hydrogen fuel cell calibration rack;
the step S2 specifically comprises the following steps:
s21, initializing opening and closing time of a hydrogen fuel cell, closing a hydrogen discharge valve by default, improving load power on the basis of certain load power, observing the voltage of a hydrogen fuel cell single chip (the hydrogen fuel cell is formed by combining one hydrogen fuel cell and one hydrogen fuel cell), opening the hydrogen discharge valve when the voltage fluctuation of the hydrogen fuel cell single chip exceeds a preset value, setting the opening time to be T, closing the hydrogen discharge valve after the T time, increasing the opening time delta T if the voltage fluctuation of the hydrogen fuel cell single chip still exceeds the preset value, repeatedly observing until the voltage fluctuation of the hydrogen fuel cell single chip is smaller than the preset value, and recording the corresponding opening time as a calibrated opening time; if the voltage fluctuation of the hydrogen fuel cell single chip is smaller than a preset value within the T time, reducing the starting time delta T until the voltage fluctuation of the hydrogen fuel cell single chip exceeds the preset value, wherein the corresponding starting time is the calibrated starting time; in the embodiment of the invention, T is 0.5s, and delta T is 0.3s; and may be self-setting in some other embodiments.
S22, in the step S21, other closing time except the default closing state of the hydrogen exhaust valve is superposed, namely the calibration closing time of the hydrogen exhaust valve is obtained;
and S23, repeating the steps S21 to S22, and calibrating the opening and closing time of the hydrogen exhaust valve under different load powers.
S3: and (3) building a hydrogen fuel cell power supply system, and determining the optimal power supply strategy of the hydrogen fuel cell according to the highest working power point P and the opening and closing time of the hydrogen discharge valve under different output powers.
The hydrogen fuel cell power supply system includes: a hydrogen fuel cell, a lithium battery and a vehicle driving motor; the hydrogen fuel cell supplies power to a driving motor of the whole vehicle; the hydrogen fuel cell charges the lithium battery; the lithium battery supplies power to a driving motor of the whole vehicle.
In step S3, the optimal power supply strategy for the hydrogen fuel cell is as follows:
when the power consumption power of the driving motor of the whole vehicle is lower than the optimal working power point P of the fuel cell and the SOC of the lithium battery is less than 100 percent, the hydrogen fuel cell works at the optimal working power point P, and the output power generation power is used for the work of the driving motor of the whole vehicle and the charging of the lithium battery;
when the SOC of the lithium battery is greater than a preset protection value and the power consumption power of the driving motor of the whole vehicle is greater than the optimal working power point P of the hydrogen fuel cell, the hydrogen fuel cell works at the optimal working power point P, and the hydrogen fuel cell and the lithium battery jointly supply power to the driving motor of the whole vehicle; in the embodiment of the invention, the preset protection value is set to be 40%, and workers in the field can also set according to actual conditions.
When the SOC of the lithium battery is lower than or equal to a preset protection value and higher than a preset warning value, the generated power of the hydrogen fuel battery is equal to the power consumption power of a driving motor of the whole vehicle, and the lithium battery stops working; the preset warning value is set to 20%, and workers in the field can set the warning value according to actual conditions.
And when the SOC of the lithium battery is lower than or equal to the preset warning value, the generated power of the hydrogen fuel battery is larger than the power consumption power of the driving motor of the whole vehicle, and the exceeded generated power is used for charging the lithium battery until the SOC of the lithium battery is higher than the preset warning value.
When the hydrogen fuel cell is powered by different strategies, the generated power of the hydrogen fuel cell is controlled and determined by the corresponding calibration opening time and the calibration closing time of the exhaust valve in the step S2.
The invention has the beneficial effects that: the fuel air-cooled fuel cell system has higher energy utilization efficiency while meeting the working requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (6)
1. A low-power air-cooled fuel cell energy management method is characterized in that: the method comprises the following steps:
s1: building a hydrogen fuel cell calibration rack, and determining the optimal working power point P of the hydrogen fuel cell in different environments;
s2: determining the calibration opening time and the calibration closing time of a hydrogen discharge valve of the hydrogen fuel cell under different output powers according to the calibration rack of the hydrogen fuel cell;
s3: and (3) building a hydrogen fuel cell power supply system, and determining the optimal power supply strategy of the hydrogen fuel cell according to the highest working power point P and the opening and closing time of the hydrogen discharge valve under different output powers.
2. A method for energy management of a low power air-cooled fuel cell as claimed in claim 1, wherein: the step S1 specifically comprises the following steps:
s11, adding flow sensors to a hydrogen inlet valve and a hydrogen exhaust valve of the hydrogen fuel cell, and calculating the mass of hydrogen consumed by the hydrogen fuel cell according to the difference between the hydrogen inlet flow and the hydrogen exhaust flow;
s12, accessing an adjustable load at an output port of the hydrogen fuel cell, recording the mass of hydrogen consumed by the corresponding hydrogen fuel cell according to different load powers, and obtaining the working efficiency of the hydrogen fuel cell under different load powers, wherein x represents the load power, n represents the working efficiency of the hydrogen fuel cell, and f represents the corresponding relation between the load power and the working efficiency of the hydrogen fuel cell;
s13: placing a hydrogen fuel cell in a controllable temperature box, recording the mass of hydrogen consumed by the hydrogen fuel cell under the condition of the same load power, and obtaining the working efficiency of the hydrogen fuel cell at different temperatures, and recording the working efficiency as g (y, n), wherein y represents the ambient temperature, n represents the working efficiency of the hydrogen fuel cell, and g represents the corresponding relation between the ambient temperature and the working efficiency of the hydrogen fuel cell;
s14: obtaining h (x, y) according to f (x, n) and g (y, n), wherein h represents the corresponding relation between the ambient temperature and the working power of the hydrogen fuel cell;
s15: and obtaining the optimal working power point P of the hydrogen fuel cell under different ambient temperatures according to h (x, y).
3. A method of energy management for a low power air-cooled fuel cell as claimed in claim 2, wherein: the step S2 specifically comprises the following steps:
s21, initializing opening and closing time of the hydrogen fuel cell, closing a hydrogen discharge valve by default, improving load power on the basis of certain load power, observing the voltage of a hydrogen fuel cell single piece, opening the hydrogen discharge valve when the voltage fluctuation of the hydrogen fuel cell single piece exceeds a preset value, setting the opening time to be T, closing the hydrogen discharge valve after the T time, increasing the opening time delta T if the voltage fluctuation of the hydrogen fuel cell single piece still exceeds the preset value, repeatedly observing until the voltage fluctuation of the hydrogen fuel cell single piece is smaller than the preset value, and recording the corresponding opening time as calibrated opening time; if the voltage fluctuation of the hydrogen fuel cell single chip is smaller than a preset value within the T time, reducing the starting time delta T until the voltage fluctuation of the hydrogen fuel cell single chip exceeds the preset value, wherein the corresponding starting time is the calibrated starting time;
s22, in the step S21, other closing time except the default closing state of the hydrogen exhaust valve is superposed to obtain the calibrated closing time of the hydrogen exhaust valve;
and S23, repeating the steps S21 to S22, and calibrating the opening and closing time of the hydrogen exhaust valve under different load powers.
4. A method of energy management for a low power air cooled fuel cell as claimed in claim 3, wherein: the hydrogen fuel cell power supply system includes: a hydrogen fuel cell, a lithium battery and a vehicle driving motor; the hydrogen fuel cell supplies power to a driving motor of the whole vehicle; the hydrogen fuel cell charges the lithium battery; the lithium battery supplies power to a driving motor of the whole vehicle.
5. A method of energy management for a low power air-cooled fuel cell as claimed in claim 4, wherein: in step S3, the optimal power supply strategy for the hydrogen fuel cell is as follows:
when the power consumption power of the driving motor of the whole vehicle is lower than the optimal working power point P of the fuel cell and the SOC of the lithium battery is less than 100 percent, the hydrogen fuel cell works at the optimal working power point P, and the output power generation power is used for the work of the driving motor of the whole vehicle and the charging of the lithium battery;
when the SOC of the lithium battery is greater than a preset protection value and the power consumption power of the driving motor of the whole vehicle is greater than the optimal working power point P of the hydrogen fuel cell, the hydrogen fuel cell works at the optimal working power point P, and at the moment, the hydrogen fuel cell and the lithium battery jointly supply power to the driving motor of the whole vehicle;
when the SOC of the lithium battery is lower than or equal to a preset protection value and higher than a preset warning value, the generated power of the hydrogen fuel battery is equal to the power consumption power of a driving motor of the whole vehicle, and the lithium battery stops working;
and when the SOC of the lithium battery is lower than or equal to the preset warning value, the generated power of the hydrogen fuel battery is larger than the power consumption power of the driving motor of the whole vehicle, and the exceeded generated power is used for charging the lithium battery until the SOC of the lithium battery is higher than the preset warning value.
6. A method of energy management for a low power air-cooled fuel cell as claimed in claim 5, wherein: when the hydrogen fuel cell is powered by different strategies, the generated power of the hydrogen fuel cell is controlled and determined by the corresponding calibration opening time and the calibration closing time of the exhaust valve in the step S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326402.1A CN115498222A (en) | 2022-10-27 | 2022-10-27 | Energy management method for low-power air-cooled fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326402.1A CN115498222A (en) | 2022-10-27 | 2022-10-27 | Energy management method for low-power air-cooled fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115498222A true CN115498222A (en) | 2022-12-20 |
Family
ID=85115109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211326402.1A Pending CN115498222A (en) | 2022-10-27 | 2022-10-27 | Energy management method for low-power air-cooled fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115498222A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116093383A (en) * | 2023-04-11 | 2023-05-09 | 北京新研创能科技有限公司 | Air inlet control method and system for hydrogen fuel cell |
-
2022
- 2022-10-27 CN CN202211326402.1A patent/CN115498222A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116093383A (en) * | 2023-04-11 | 2023-05-09 | 北京新研创能科技有限公司 | Air inlet control method and system for hydrogen fuel cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113410537B (en) | Power battery charging thermal management control method and system | |
| CN112060982B (en) | Dynamically balanced fuel cell unmanned aerial vehicle energy management method | |
| CN110911721B (en) | Fuel cell control method and fuel cell control device | |
| CN115498222A (en) | Energy management method for low-power air-cooled fuel cell | |
| CN113948739B (en) | Vehicle-mounted fuel cell engine system and control method | |
| CN106494328B (en) | It is a kind of based on electrical power line computation fuel-engined vehicle electric energy control system and method | |
| CN101051694A (en) | Control method and system for power output of fuel cell generation system | |
| CN114243136B (en) | Charging optimization method for lithium battery | |
| CN114824357B (en) | Cooling system, test method and evaluation method for power assembly of hydrogen fuel cell electric vehicle | |
| CN111933969A (en) | Balanced heat dissipation fuel cell thermal management system and control method | |
| CN115472871A (en) | Fuel cell anode hydrogen pressure control system and method | |
| KR20190063313A (en) | Apparatus for controlling fan of open cathode type fuel cell | |
| JP2014049402A (en) | Cooling method of secondary battery | |
| CN113809367A (en) | Control method and control device for fuel cell system | |
| CN210640316U (en) | Air-cooled hydrogen fuel cell system | |
| CN112590763A (en) | Planet series-parallel hybrid electric vehicle energy optimization method based on battery heat and aging | |
| CN114030389B (en) | Electric automobile battery thermal management control method and device | |
| CN215377503U (en) | Liquid cooling and direct cooling combined electric automobile power battery cooling device | |
| CN114824370A (en) | Whole vehicle energy control method of double-pile fuel cell system | |
| CN115275264A (en) | Multi-stack fuel cell cooling system and control method | |
| CN112152257B (en) | Distributed energy system and control method thereof | |
| CN111682759B (en) | Fuel cell DC-DC converter operation control method, computer readable storage medium and fuel cell | |
| CN112909299A (en) | Air-cooled fuel cell hydrogen supply system and control method | |
| CN114056130A (en) | Electric supercharger protection method and system and automobile | |
| LU500283B1 (en) | A Control Method of Hybrid Power of Hydrogen Fuel Cell and an Unmanned Aerial Vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |