CN114039067A - Hydrogen fuel cell automobile power system - Google Patents
Hydrogen fuel cell automobile power system Download PDFInfo
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- CN114039067A CN114039067A CN202111284789.4A CN202111284789A CN114039067A CN 114039067 A CN114039067 A CN 114039067A CN 202111284789 A CN202111284789 A CN 202111284789A CN 114039067 A CN114039067 A CN 114039067A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 118
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 118
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 239000000446 fuel Substances 0.000 title claims abstract description 26
- 239000000523 sample Substances 0.000 claims abstract description 20
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 18
- 230000029087 digestion Effects 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 abstract description 3
- 238000004220 aggregation Methods 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
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- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
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- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling 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
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous 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
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04104—Regulation of differential pressures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a hydrogen fuel cell automobile power system, which comprises a high-pressure hydrogen storage tank, wherein a pressure probe is arranged on the high-pressure hydrogen storage tank, the high-pressure hydrogen storage tank is communicated with a main electric pile and an auxiliary electric pile through pipelines, and electromagnetic valves are arranged on the pipelines between the high-pressure hydrogen storage tank and the main electric pile and the pipelines between the high-pressure hydrogen storage tank and the auxiliary electric pile; the main electric pile is electrically connected with the storage battery and the vehicle power consumption structure, the auxiliary electric pile is electrically connected with the storage battery, and the storage battery is electrically connected with the vehicle power consumption structure; the invention can collect and utilize leaked hydrogen, improve the utilization efficiency of energy, avoid the problem of energy waste caused by hydrogen escape and the problem of combustion and explosion caused by hydrogen escape and aggregation, and reduce the actual use time of the storage battery, thereby effectively prolonging the service life of the storage battery.
Description
Technical Field
The invention belongs to the technical field of hydrogen fuel automobiles, and particularly relates to a hydrogen fuel cell automobile power system.
Background
The hydrogen fuel cell is a device which directly converts chemical energy of hydrogen and oxygen into electric energy through reaction, has good development space due to the characteristics of no pollution and reproducibility, the hydrogen fuel cell vehicle is loaded with the hydrogen fuel cell and is driven by taking the hydrogen as an energy source, the hydrogen of the vehicle-mounted battery in the prior art is mainly stored through a high-pressure technology, namely liquid hydrogen or gaseous hydrogen is stored through a high-pressure tank body, the internal pressure of the high-pressure tank is greatly changed due to the influence of temperature, when the pressure in the high-pressure tank reaches a safety threshold, the hydrogen leakage usually occurs, so that the energy loss and potential safety hazards are caused, in addition, the hydrogen energy passenger car is usually connected with the hydrogen fuel cell and supplies power for power consumption structures such as a power system, instruments and the like through the storage battery in order to provide a stable and quick response power source when in work, the storage battery can be in a power supply state for a long time, the service life of the storage battery is negatively influenced, and in order to solve the problems, the invention provides a technical scheme which can solve the problems of hydrogen leakage and short service life of the storage battery.
Disclosure of Invention
The invention aims to provide a hydrogen fuel cell automobile power system, which solves the problem that hydrogen fuel is easy to leak in the prior art and prolongs the service life of a storage battery of a hydrogen fuel cell automobile.
The purpose of the invention can be realized by the following technical scheme:
a hydrogen fuel cell automobile power system comprises a high-pressure hydrogen storage tank, wherein a pressure probe is arranged on the high-pressure hydrogen storage tank and used for detecting the pressure in the high-pressure hydrogen storage tank and transmitting a detected pressure signal to a controller, the high-pressure hydrogen storage tank is communicated with a main electric pile and an auxiliary electric pile through pipelines, and electromagnetic valves are arranged on the pipelines between the high-pressure hydrogen storage tank and the main electric pile and the pipelines between the high-pressure hydrogen storage tank and the auxiliary electric pile;
the main electric pile is electrically connected with the storage battery and the vehicle power consumption structure, the auxiliary electric pile is electrically connected with the storage battery, and the storage battery is electrically connected with the vehicle power consumption structure;
the working method of the auxiliary electric pile comprises the following steps:
step one, a pressure probe detects the pressure value in the high-pressure hydrogen storage tank once every t2 time, and when the pressure value detected by the pressure probe is greater than p continuously for n times, a controller controls a valve and an electromagnetic valve of the high-pressure hydrogen storage tank to be opened;
t2 and p are preset values, n is a natural number greater than or equal to 2, and p is the highest safe working pressure value of the high-pressure hydrogen storage tank;
and secondly, continuously supplying hydrogen to the auxiliary galvanic pile by the high-pressure hydrogen storage tank, enabling the auxiliary galvanic pile to work for power generation, transmitting the generated direct current to a storage battery for storage, detecting the pressure value in the high-pressure hydrogen storage tank once every t2 by the pressure probe in the hydrogen supply process of the high-pressure hydrogen storage tank, and controlling the valve and the electromagnetic valve of the high-pressure hydrogen storage tank to be closed by the controller when the pressure value detected by the pressure probe is less than p-p1 for n1 times continuously, wherein p1 is a preset value.
As a further scheme of the invention, in the first step, the pressure probe detects the pressure value in the high-pressure hydrogen storage tank after the vehicle is shut down for t1 minutes, and t1 is a preset value.
As a further aspect of the invention, the hydrogen supply rate of the high-pressure hydrogen tank in the second step is less than or equal to the hydrogen digestion rate of the auxiliary stack.
As a further scheme of the invention, when the electric storage quantity of the storage battery is less than or equal to a preset value Q% and the maximum consumed power in the running process of the vehicle is less than the maximum output power of the main electric pile, the main electric pile supplies power, and redundant electric energy is stored in the storage battery;
when the electric storage quantity of the storage battery is larger than a preset value Q1%, and the maximum consumed power in the running process of the vehicle is smaller than the maximum output power of the main electric pile, the main electric pile and the storage battery supply power together;
q1 and Q are both preset values, Q1 is more than Q, and when the storage battery capacity is in the range, the power supply logic before entering the range is maintained.
As a further scheme of the invention, when the main electric pile and the storage battery supply power together, the main electric pile keeps constant output power, and the output power of the storage battery is adjusted to supply power for a vehicle power consumption structure.
As a further aspect of the present invention, the auxiliary stack operates to charge the battery when the maximum consumption power during the driving of the vehicle is greater than the maximum output power of the main stack.
As a further scheme of the invention, when the electric storage quantity of the storage battery is less than or equal to the preset value Q%, and the maximum consumed power during the running of the vehicle is less than the maximum output power of the main electric pile, the main electric pile supplies power, and redundant electric energy is stored in the storage battery until the capacity of the storage battery reaches Q2, wherein Q < Q2 < 100.
The invention has the beneficial effects that:
1. the high-pressure hydrogen storage tank can be continuously and actively monitored, the pressure in the high-pressure hydrogen storage tank is reduced in an active pressure relief mode, hydrogen in the high-pressure hydrogen storage tank is led into the auxiliary galvanic pile to generate electricity, the pressure in the high-pressure hydrogen storage tank exceeds a safety value due to factors such as temperature and the like is reduced, in addition, leaked hydrogen can be collected and utilized, the utilization efficiency of energy is improved, and the energy waste problem caused by hydrogen escape and the burning explosion problem caused by hydrogen escape and aggregation are avoided;
2. according to the invention, the main electric pile is used for directly supplying power under certain conditions, so that the actual service life of the storage battery can be shortened, the service life of the storage battery can be effectively prolonged, the storage battery can be prevented from being in a high-load state in an acceleration stage by the power supply of the main electric pile, the effect of protecting the storage battery can be further achieved, and the highest output power of a vehicle can be improved.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a simple structure of a hydrogen fuel cell automobile power system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A hydrogen fuel cell automobile power system comprises a high-pressure hydrogen storage tank, as shown in figure 1, wherein a pressure probe is arranged on the high-pressure hydrogen storage tank, the pressure probe is used for detecting the pressure in the high-pressure hydrogen storage tank and transmitting a detected pressure signal to a controller, the high-pressure hydrogen storage tank is communicated with a main electric pile and an auxiliary electric pile through pipelines, and electromagnetic valves are arranged on the pipelines between the high-pressure hydrogen storage tank and the main electric pile and the pipelines between the high-pressure hydrogen storage tank and the auxiliary electric pile;
the high-pressure hydrogen storage tank is a storage tank for storing high-pressure gaseous hydrogen or liquid hydrogen;
the main electric pile and the auxiliary electric pile are both hydrogen fuel cell electric piles, wherein the main electric pile is a main power generation electric pile of a hydrogen fuel cell automobile power system;
the main electric pile is electrically connected with the storage battery and the vehicle power consumption structure, the auxiliary electric pile is electrically connected with the storage battery, the storage battery is electrically connected with the vehicle power consumption structure, and the vehicle power consumption structure comprises power consumption structures such as a power system and an instrument system on a hydrogen fuel cell vehicle;
the working method of the auxiliary galvanic pile comprises the following steps:
step one, after the vehicle is shut down for t1 minutes, the pressure probe detects the pressure value in the high-pressure hydrogen storage tank once every t2 time, and when the pressure value detected by the pressure probe is greater than p continuously for n times, the controller controls the opening of a valve and an electromagnetic valve of the high-pressure hydrogen storage tank;
wherein t1, t2 and p are preset values, n is a natural number more than or equal to 2, and p is the highest safe working pressure value of the high-pressure hydrogen storage tank;
the pressure data is collected after the vehicle is stopped for t1 minutes, so that components such as a high-pressure hydrogen storage tank and the like can be kept still in the environment and recovered to a stable value, the influence of the working state of the vehicle on the components can be reduced, and the authenticity of the data collected by the pressure probe is ensured;
secondly, the high-pressure hydrogen storage tank continuously supplies hydrogen to the auxiliary galvanic pile, the auxiliary galvanic pile works to generate electricity, generated direct current is transmitted to the storage battery to be stored, the pressure probe always detects the pressure value in the high-pressure hydrogen storage tank at intervals of t2 in the hydrogen supply process of the high-pressure hydrogen storage tank, when the pressure value detected by the pressure probe is less than p-p1 for n1 times continuously, the controller controls the valve and the electromagnetic valve of the high-pressure hydrogen storage tank to be closed, wherein p1 is a preset value;
it is noted that the hydrogen supply rate of the high-pressure hydrogen storage tank in the second step is less than or equal to the hydrogen digestion rate of the auxiliary stack;
preferably, the hydrogen supply rate of the high-pressure hydrogen storage tank is a constant value, so that the working stability of the auxiliary galvanic pile can be improved, and the complexity of a control system is reduced;
the mode can continuously monitor the high-pressure hydrogen storage tank, when the pressure of the high-pressure hydrogen storage tank reaches a preset value, the pressure in the high-pressure hydrogen storage tank is reduced in an active pressure relief mode, hydrogen in the high-pressure hydrogen storage tank is led into the auxiliary galvanic pile to generate electricity, and electric energy produced by the auxiliary galvanic pile is stored in the storage battery, so that the safety of the whole driving system can be improved, the situation that the pressure in the high-pressure hydrogen storage tank exceeds a safety value due to factors such as temperature and the like is reduced, in addition, leaked hydrogen can be collected and utilized, the utilization efficiency of energy is improved, the energy waste problem caused by hydrogen escape and the explosion problem caused by hydrogen escape and aggregation are reduced;
during the running process of the vehicle, power is supplied through the main electric pile and/or the storage battery, wherein the power is preferentially supplied through the main electric pile;
specifically, when the electric storage quantity of the storage battery is smaller than or equal to a preset value Q% and the maximum consumed power in the running process of the vehicle is smaller than the maximum output power of the main electric pile, the main electric pile is used for supplying power completely, and redundant electric energy is stored in the storage battery;
in one embodiment of the application, when the electric storage quantity of the storage battery is smaller than or equal to a preset value Q% and the maximum consumed power in the running process of the vehicle is smaller than the maximum output power of the main electric pile, the main electric pile is used for supplying power completely, and redundant electric energy is stored in the storage battery until the storage battery is full;
in another embodiment of the invention, when the storage capacity of the storage battery is less than or equal to the preset value Q%, and the maximum consumed power in the running process of the vehicle is less than the maximum output power of the main electric pile, the main electric pile is completely powered, and redundant electric energy is stored in the storage battery until the capacity of the storage battery reaches Q2, wherein Q is less than Q2 and less than 100, and capacity space is reserved for the operation of the auxiliary electric pile;
when the electric storage quantity of the storage battery is larger than a preset value Q1%, and the maximum consumed power in the running process of the vehicle is smaller than the maximum output power of the main electric pile, the main electric pile and the storage battery supply power together, the main electric pile keeps constant output power, and the output power of the storage battery is adjusted to supply power for a vehicle power consumption structure;
wherein Q1 > Q, when the storage battery capacity is in the range, the power supply logic before entering the range is maintained;
when the maximum consumed power in the running process of the vehicle is greater than the maximum output power of the main electric pile, the auxiliary electric pile works to charge the storage battery;
the auxiliary electric pile can be used for treating leaked hydrogen caused by high pressure in the high-pressure hydrogen storage tank on one hand, and can also be used for generating power to supply energy to the storage battery under the condition that the vehicle is in high power consumption on the other hand;
when the maximum consumption power during the running of the vehicle is less than the maximum output power of the main stack,
the method for adjusting the output power of the hydrogen fuel cell automobile power system comprises the following steps:
s1, monitoring the power consumption rate of the vehicle power consumption structure in real time, and sending power Mn to a controller at intervals of preset time t3 to obtain continuous M1, M2, M3,. and Mn;
s2, using Mi, M (i +1), and M (i +2) as a set of detection data, where i has a value range of one of 1, 2, 3,. & n-2, when M (i +2) - [ | Mi + M (i +1) | ]/2 < Mk, the power supply end formed by the main cell stack and the storage battery maintains the original output power My, and if M (i +2) - [ | Mi + M (i +1) | ]/2 is greater than or equal to Mk, the output power is increased to My + Mf1, where Mk and Mf1 are preset values, Mf (i +2) -M (i +1), and Mf1 is set to ensure that the power supply power of the main cell stack is greater than the power consumption power of the vehicle power consumption structure;
the method can reduce the actual service life of the storage battery, so that the service life of the storage battery is effectively prolonged, the main electric pile is used for directly supplying power under proper conditions, the output of the main electric pile is stabilized, the output power of the storage battery is adjusted to discharge, so that the stability of the output power of the main electric pile is ensured, in addition, the storage battery can be prevented from being in a high-load state in an acceleration stage by the power supply of the main electric pile, the effect of protecting the storage battery can be further achieved, and the highest output power of a vehicle can be improved.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The hydrogen fuel cell automobile power system is characterized by comprising a high-pressure hydrogen storage tank, wherein a pressure probe is arranged on the high-pressure hydrogen storage tank and used for detecting the pressure in the high-pressure hydrogen storage tank and transmitting a detected pressure signal to a controller;
the main electric pile is electrically connected with the storage battery and the vehicle power consumption structure, the auxiliary electric pile is electrically connected with the storage battery, and the storage battery is electrically connected with the vehicle power consumption structure;
the working method of the auxiliary electric pile comprises the following steps:
step one, a pressure probe detects the pressure value in the high-pressure hydrogen storage tank once every t2 time, and when the pressure value detected by the pressure probe is greater than p continuously for n times, a controller controls a valve and an electromagnetic valve of the high-pressure hydrogen storage tank to be opened;
t2 and p are preset values, n is a natural number greater than or equal to 2, and p is the highest safe working pressure value of the high-pressure hydrogen storage tank;
and secondly, continuously supplying hydrogen to the auxiliary galvanic pile by the high-pressure hydrogen storage tank, enabling the auxiliary galvanic pile to work for power generation, transmitting the generated direct current to a storage battery for storage, detecting the pressure value in the high-pressure hydrogen storage tank once every t2 by the pressure probe in the hydrogen supply process of the high-pressure hydrogen storage tank, and controlling the valve and the electromagnetic valve of the high-pressure hydrogen storage tank to be closed by the controller when the pressure value detected by the pressure probe is less than p-p1 for n1 times continuously, wherein p1 is a preset value.
2. The hydrogen fuel cell automobile power system as claimed in claim 1, wherein the pressure probe detects the pressure value in the high-pressure hydrogen storage tank in the first step after the vehicle is shut down for t1 minutes, and t1 is a preset value.
3. The hydrogen fuel cell automotive power system according to claim 1, characterized in that the hydrogen supply rate of the high-pressure hydrogen tank in the second step is equal to or less than the hydrogen digestion rate of the auxiliary stack.
4. The hydrogen fuel cell automotive power system according to claim 1, characterized in that:
when the electric storage quantity of the storage battery is smaller than or equal to a preset value Q% and the maximum consumed power in the running process of the vehicle is smaller than the maximum output power of the main electric pile, the main electric pile supplies power, and redundant electric energy is stored in the storage battery;
when the electric storage quantity of the storage battery is larger than a preset value Q1%, and the maximum consumed power in the running process of the vehicle is smaller than the maximum output power of the main electric pile, the main electric pile and the storage battery supply power together;
q1 and Q are both preset values, Q1 is more than Q, and when the storage battery capacity is in the range, the power supply logic before entering the range is maintained.
5. The hydrogen-fuel cell vehicle power system of claim 4, wherein when the main stack is co-powered with the battery, the main stack maintains a constant output power, and the output power of the battery is adjusted to power the vehicle power consuming structure.
6. The hydrogen-fuel cell automotive power system according to claim 1, characterized in that the auxiliary stack operates to charge the battery when the maximum power consumption during the running of the vehicle is greater than the maximum output power of the main stack.
7. The hydrogen fuel cell automobile power system as claimed in claim 4, wherein when the storage capacity of the battery is less than or equal to the preset value Q%, and the maximum power consumption during the running of the vehicle is less than the maximum output power of the main stack, the main stack supplies power, and the surplus power is stored in the battery until the capacity of the battery reaches Q2, wherein Q < Q2 < 100.
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| CN202111284789.4A CN114039067A (en) | 2021-11-01 | 2021-11-01 | Hydrogen fuel cell automobile power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115009497A (en) * | 2022-06-01 | 2022-09-06 | 中创海洋科技股份有限公司 | Hydrogen energy ship |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115009497A (en) * | 2022-06-01 | 2022-09-06 | 中创海洋科技股份有限公司 | Hydrogen energy ship |
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