CN114932815A - Power generation power distribution method for hydrogen fuel cell power-saving vehicle - Google Patents
Power generation power distribution method for hydrogen fuel cell power-saving vehicle Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- 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
- B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
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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
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H—ELECTRICITY
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
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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
- H01M8/04664—Failure or abnormal function
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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
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- 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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Abstract
The invention discloses a method for distributing the generated power of a hydrogen fuel cell power-saving vehicle, which comprises a relay, a timer, a hydrogen fuel cell, a lithium battery and an energy management device which are arranged on the power-saving vehicle, wherein the relay and the timer are initialized firstly, fault alarm information of hydrogen leakage or insufficient hydrogen is judged whether to exist in the process, if yes, the power-saving vehicle is shut down, and if not, all parts in the hydrogen fuel power-saving vehicle are subjected to self-checking; the method comprises the steps that lithium battery reverse charging is prepared, the lithium battery feeds back allowable charging information and maximum allowable chargeable current, an inverter charges the lithium battery according to the lithium battery feedback information, and power distribution is carried out in the stage if no commercial power exists or commercial power exists and the SOC of the lithium battery is larger than 90%; the invention realizes safe and stable energy supply, reasonably coordinates the hydrogen fuel cell system and the lithium battery system, prolongs the service life of the battery, simultaneously performs interval division on different load working conditions, efficiently fits the load required power and the generating power of the fuel cell system in intervals, and improves the generating efficiency of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of battery energy management, in particular to a method for distributing generated power of a hydrogen fuel cell electric vehicle.
Background
Electricity is an important requirement of almost equal positions as water in human productive life. Especially in hospitals, research institutes, high-rise buildings, factories, companies and other places related to electric power intensity, the power outage can cause huge economic loss and even cause serious damage to the lives of people. Therefore, the electric protection vehicle for ensuring the uninterrupted supply of energy sources can be used as required and plays an important role in a great number of occasions.
Diesel power generation, gasoline power generation, coal-fired power generation, and the like are power generation by burning non-renewable resources. The mode has low energy conversion efficiency, aggravates environmental pollution and enhances greenhouse effect. The other type of wind power generation, water conservancy generation, solar power generation and the like uses green and environment-friendly energy for power generation, but the power generation mode is limited by various environmental factors such as temperature, climate and geography and can only be used in specific regions and even in specific time. The hydrogen is taken as renewable energy, has high energy efficiency and strong energy density, can be flexibly used, only generates heat and water in the power generation operation process, and is an ideal power generation energy.
As an emergency power supply device, the power protection vehicle has the advantages of complex use scene, random use time and relatively sufficient generated energy, so that the power protection vehicle is environment-friendly and efficient, and high-energy and high-efficiency hydrogen energy which can be flexibly used is ideal as a power generation energy.
The response speed of hydrogen energy electricity generation is slower, in order to guarantee the power supply of no break between, and the energy supply is sufficient, two hydrogen fuel cell and lithium cell cooperations of facial make-up and chassis in this patent. The lithium battery has quick response, can make up the deficiency of hydrogen power generation, can absorb the redundant electric energy of the energy fuel battery, plays a very good role in peak clipping and valley filling, and realizes stable and sufficient power supply. At present, hybrid energy power generation in power-preserving vehicles and other fields is realized by considering energy efficiency mostly and considering the service life of fuel cells and lithium cells less. It is only found that a real-time energy management control method capable of improving the service life of a fuel cell is proposed in patent application No. CN202111270878.3, which discloses a real-time energy management control method capable of improving the service life of a fuel cell, and the service life of the fuel cell is taken into consideration. However, in this system, various driving modes are considered for a running automobile, and efficient coordination between the hydrogen fuel cell and the super capacitor is mainly considered, so that the impact of current on the fuel cell, the power generation capability of the fuel cell and the power generation efficiency of the hydrogen fuel cell are less considered under the sudden change of energy demand. Therefore, a method for distributing the generated power of the hydrogen fuel cell electric vehicle is needed.
Disclosure of Invention
The invention aims to provide a method for distributing the generated power of a hydrogen fuel cell electric vehicle;
the invention is realized by the following steps:
a power generation power distribution method for a hydrogen fuel cell power-saving vehicle comprises a relay, a timer, a hydrogen fuel cell, a lithium battery and an energy management device which are installed on the power-saving vehicle, and is characterized by comprising the following steps:
S 1 firstly, initializing a relay and a timer, judging whether fault alarm information of hydrogen leakage or hydrogen deficiency exists in the process, if yes, shutting down the machine, if not, performing the step S 2 ；
S 2 Self-checking each component in the hydrogen fuel lithium battery, if the self-checking signal is normal, thenGo to step S 3 If the self-checking signal is abnormal or hydrogen leaks, the machine is shut down;
S 3 starting up each component such as a hydrogen fuel lithium battery, judging whether the starting up is successful or not according to the feedback signal, and entering step S4 after the starting up is successful, if hydrogen leaks at this stage, stopping the engine if the starting up is unsuccessful and the fault alarm information is judged to be off;
S 4 detecting the SOC of the commercial power and the lithium battery, and entering the step S if the commercial power exists and the SOC is less than 90 percent 5 (ii) a If no commercial power exists or the city exists and the SOC is more than 90 percent, the electricity enters S 6 (ii) a If fault alarm information of hydrogen leakage exists at the stage, the machine is shut down;
S 5 preparing the reverse charging of the lithium battery, feeding back the charging permission information and the maximum chargeable current by the lithium battery, charging the lithium battery by the inverter according to the feedback information of the lithium battery, and entering the step S6 if no commercial power exists or the commercial power exists and the SOC is more than 90%; if fault alarm information such as hydrogen leakage exists in the stage, the machine is shut down;
S 6 performing power distribution;
S 7 shutting down the machine.
Further, in step S 6 In the middle, the power distribution is carried out on the hydrogen fuel cell and the lithium battery according to the power required at the last moment;
S 6.1 the fuel cell is started up according to a load power distribution strategy;
S 6.2 according to the difference of high-efficiency sections of hydrogen fuel cells on a power-preserving vehicle and a chassis, the output power of each system is divided into the following sections:
when the direct current load power is not less than P2 and not more than P1, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1.44: 1;
when the direct current load power is not less than P3 and is less than P2, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1: 1;
when the direct current load power is not less than P4 and is less than P3, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1: 0;
when the direct current load power is not less than P5 and not more than P4, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 0: 1;
when the direct current load power is less than P5, in order to ensure the endurance of the chassis power system, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1: 0;
S 6.3 the power distribution is further divided according to the change of an SOC curve of the lithium battery, when the electric quantity of the lithium battery is between SOC1 and SOC2, the fuel battery and the lithium battery are divided according to a table look-up, and when the electric quantity of the lithium battery is less than SOC1, the power distribution is distributed according to the step S6.4; when the electric quantity of the lithium battery is greater than SOC2, the hydrogen fuel cell is in idle speed, and the generated energy is 0;
S 6.4 step S 6.1 The SOC of the middle power switching point keeps in a 5% upward hysteresis interval;
if the maximum power which can be output by the fuel cell system is less than the step S 6 And the value of the required power is output by generating power according to the minimum value. If there is hydrogen leakage or other abnormal fault at this stage, the system is shut down, if there is commercial power and the battery capacity is less than SOC3, the process goes to step S 5 。
Further, in step S 6 In the method, a plurality of fuel cell systems carry out dynamic response processing according to sudden power change of a load end; the method comprises the following specific steps:
i: detecting the power of a load end in real time, and if the load power is less than the power 1, the execution power generation amount of the hydrogen fuel cell is a power command of the power 1;
II: if the load power is larger than the power 1, the execution power generation amount of the hydrogen fuel cell is a power 2 power command;
III: if the load power is reduced to be lower than the power 1 in the process, the execution power generation amount of the hydrogen fuel cell is a power 1 power command;
IV: if the load is changed to be more than the power 1 and kept for 5min, the execution generating capacity of the hydrogen fuel cell is the power 2;
v: and (5) circularly judging the load power condition, and executing the step III if the load power is reduced to be lower than the power 1.
Further, the energy management device of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a main controller, implements the method as described in any one of the above.
Compared with the prior art, the invention has the beneficial effects that:
1. the power distribution is carried out on the hydrogen fuel cell, the lithium battery and the like of the upper chassis during power generation, safe and stable energy supply is realized, the service life of the battery is prolonged, meanwhile, different load working conditions are subjected to interval division, the load power demand and the high-efficiency interval fitting of the power generation power of the fuel cell system are realized, and the power generation efficiency of the whole vehicle is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a method of the present invention;
fig. 2 is a flow chart of the allocation policy of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-2, a method for distributing generated power of a hydrogen fuel cell electric vehicle includes the following steps:
in the embodiment, the system comprises a relay, a timer, a hydrogen fuel cell, a lithium battery and an energy management device which are installed on a power-saving vehicle, and is characterized by comprising the following steps:
S 1 firstly, initializing a relay and a timer, judging whether the process has fault alarm information of hydrogen leakage or hydrogen deficiency, if yes, shutting down the hydrogen supply, and if not, performing the step S 2 ；
S 2 Performing self-checking on each component in the hydrogen fuel lithium battery, and entering step S if the self-checking signal is normal 3 If the self-checking signal is abnormal or hydrogen leaks, the machine is shut down;
S 3 starting up each component of hydrogen fuel lithium battery, judging whether the starting up is successful according to the feedback signal, and entering step S after the starting up is successful 4 If hydrogen is leaked at this stage, the failure alarm information of unsuccessful starting is shut down;
S 4 detecting the SOC of the commercial power and the lithium battery, and entering the step S if the commercial power exists and the SOC is less than 90 percent 5 (ii) a If no commercial power exists or commercial power exists and SOC is more than 90%, entering S 6 (ii) a If fault alarm information of hydrogen leakage exists at the stage, the machine is shut down;
S 5 preparing for reverse charging of the lithium battery, feeding back the charging allowable information and the maximum allowable chargeable current by the lithium battery, charging the lithium battery by the inverter according to the feedback information of the lithium battery, and entering step S6 if no commercial power exists or commercial power exists and the SOC is more than 90%; if fault alarm information such as hydrogen leakage exists in the stage, the machine is shut down;
S 6 performing power distribution;
S 7 shutting down the machine.
In this embodiment, in step S 6 In accordance with the previous oneThe power is distributed to the hydrogen fuel cell and the lithium battery according to the power demand at any moment;
S 6.1 the fuel cell is started up according to a load power distribution strategy;
S 6.2 according to the difference of high-efficiency sections of hydrogen fuel cells on a power-preserving vehicle and a chassis, the output power of each system is divided into the following sections:
when the direct current load power is not less than P2 and not more than P1, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1.44: 1;
when the direct current load power is not less than P3 and is less than P2, the power request of the control system is distributed according to the output power of the hydrogen fuel cell with the upper hydrogen fuel cell and the output power of the hydrogen fuel cell with the chassis being 1: 1;
when the direct current load power is not less than P4 and is less than P3, the power request of the control system is distributed according to the output power of the hydrogen fuel cell with the upper hydrogen fuel cell and the output power of the hydrogen fuel cell with the chassis being 1: 0;
when the direct current load power is not less than P5 and not more than P4, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 0: 1;
when the direct current load power is less than P5, in order to ensure the endurance of the chassis power system, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1: 0;
S 6.3 the power distribution is further divided according to the change of the SOC curve of the lithium battery, when the electric quantity of the lithium battery is between SOC1 and SOC2, the fuel battery and the lithium battery are divided according to a table look-up, and when the electric quantity of the lithium battery is less than SOC1, the power distribution is divided according to the step S 6.4 Distributing; when the electric quantity of the lithium battery is greater than SOC2, the hydrogen fuel cell is in idle speed, and the generated energy is 0;
S 6.4 step S 6.1 The SOC of the middle power switching point is kept in a hysteresis interval of 5 percent upwards;
if the maximum power which can be output by the fuel cell system is less than the step S 6 And the value of the required power is output by power generation according to the minimum value. If there is hydrogen leakage or other abnormality at this stageIf the power is not available, the system is shut down, if the commercial power is available, the battery power is less than SOC3, the process goes to step S 5 。
In the present embodiment, in step S 6 In the method, a plurality of fuel cell systems carry out dynamic response processing according to sudden power change of a load end; the method comprises the following specific steps:
i: detecting the power of a load end in real time, and if the load power is less than the power 1, the execution power generation amount of the hydrogen fuel cell is a power command of the power 1;
II: if the load power is larger than the power 1, the execution power generation amount of the hydrogen fuel cell is a power 2 power command;
III: if the load power is reduced to be lower than the power 1 in the process, the execution power generation amount of the hydrogen fuel cell is a power 1 power command;
IV: if the load is changed to be more than the power of 1 power and kept for 5min, the execution generating capacity of the hydrogen fuel cell is the power of 2 power;
v: and (5) circularly judging the load power condition, and executing the step III if the load power is reduced to be lower than the power 1.
In this embodiment, the energy management device of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a main controller, implements the method as set forth in any one of the above.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A power generation power distribution method for a hydrogen fuel cell power-saving vehicle comprises a relay, a timer, a hydrogen fuel cell, a lithium battery and an energy management device which are installed on the power-saving vehicle, and is characterized by comprising the following steps:
S 1 firstly, the relay and timer are initialized to judge whether there is hydrogen leakage or insufficient hydrogen fault report in the processAlarm information, if yes, shutting down, if no, proceeding to step S 2 ；
S 2 Performing self-check on each component in the hydrogen fuel lithium battery, wherein the self-check signal is normal, and entering the step S 3 If the self-checking signal is abnormal or hydrogen leaks, the machine is shut down;
S 3 starting up each component of hydrogen fuel lithium battery, judging whether the starting up is successful according to the feedback signal, and entering step S after the starting up is successful 4 If hydrogen is leaked at this stage, the failure alarm information of unsuccessful starting is shut down;
S 4 detecting the SOC of the commercial power and the lithium battery, and entering the step S if the commercial power exists and the SOC is less than 90 percent 5 (ii) a If no commercial power exists or commercial power exists and SOC is more than 90%, entering S 6 (ii) a If fault alarm information of hydrogen leakage exists at the stage, the system is shut down;
S 5 preparing the reverse charge of the lithium battery, feeding back the allowable charge information and the maximum allowable chargeable current by the lithium battery, charging the lithium battery by the inverter according to the feedback information of the lithium battery, and entering the step S if no commercial power exists or the commercial power exists and the SOC is more than 90 percent at the stage 6 (ii) a If fault alarm information such as hydrogen leakage exists in the stage, the machine is shut down;
S 6 carrying out power distribution;
S 7 shutting down the machine.
2. The power distribution method of claim 1, wherein the step S is executed in step S 6 In the middle, the power distribution is carried out on the hydrogen fuel cell and the lithium battery according to the power required at the last moment;
S 6.1 the fuel cell is started up according to a load power distribution strategy;
S 6.2 according to the difference of high-efficiency sections of hydrogen fuel cells on a power-preserving vehicle and a chassis, the output power of each system is divided into the following sections:
when the direct current load power is not less than P2 and not more than P1, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1.44: 1;
when the direct current load power is not less than P3 and is less than P2, the power request of the control system is distributed according to the output power of the hydrogen fuel cell with the upper hydrogen fuel cell and the output power of the hydrogen fuel cell with the chassis being 1: 1;
when the direct current load power is not less than P4 and is less than P3, the power request of the control system is distributed according to the output power of the hydrogen fuel cell with the upper hydrogen fuel cell and the output power of the hydrogen fuel cell with the chassis being 1: 0;
when the direct current load power is not less than P5 and not more than P4, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 0: 1;
when the direct current load power is less than P5, in order to ensure the endurance of the chassis power system, the power request of the control system is distributed according to the output power of the upper hydrogen fuel cell and the output power of the chassis hydrogen fuel cell being 1: 0;
S 6.3 the power distribution is further divided according to the change of the SOC curve of the lithium battery, when the electric quantity of the lithium battery is between SOC1 and SOC2, the fuel battery and the lithium battery are divided according to a table look-up, and when the electric quantity of the lithium battery is smaller than SOC1, the power distribution is divided according to the step S 6.4 Distributing; when the electric quantity of the lithium battery is greater than SOC2, the hydrogen fuel cell is in idle speed, and the generated energy is 0;
S 6.4 step S 6.1 The SOC at the medium power switching point remains in the 5% hysteresis interval upward.
3. The power generation distribution method of the hydrogen fuel cell electric vehicle according to claim 2, characterized in that in step S 6 In the method, a plurality of fuel cell systems carry out dynamic response processing according to sudden power change of a load end; the method comprises the following specific steps:
i: detecting the power of a load end in real time, and if the load power is less than the power 1, the execution power generation amount of the hydrogen fuel cell is a power command of the power 1;
II: if the load power is larger than the power 1, the execution power generation amount of the hydrogen fuel cell is a power 2 power command;
III: if the load power is reduced to be lower than the power 1 in the process, the execution power generation amount of the hydrogen fuel cell is a power 1 power command;
IV: if the load is changed to be more than the power of 1 power and kept for 5min, the execution generating capacity of the hydrogen fuel cell is the power of 2 power;
v: and (5) circularly judging the load power condition, and executing the step III if the load power is reduced to be lower than the power 1.
4. The power generation distribution method of the hydrogen fuel cell power-saving vehicle according to claim 3, wherein the maximum power which can be output by the fuel cell system is less than step S 6 And the value of the required power is output by power generation according to the minimum value.
5. The power distribution method of claim 3, wherein if there is hydrogen leakage or other abnormal failure, the system is shut down, and if there is commercial power and the battery power is less than SOC3, the method proceeds to step S 5 。
6. A computer-readable storage medium, on which a computer program is stored, which, when executed by a master controller, implements the method of any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210554117.9A CN114932815B (en) | 2022-05-19 | 2022-05-19 | Power generation power distribution method for hydrogen fuel cell electric protection car |
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