CN108556672A - A kind of control method and system of fuel cell hybrid system - Google Patents
A kind of control method and system of fuel cell hybrid system Download PDFInfo
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- CN108556672A CN108556672A CN201810514596.5A CN201810514596A CN108556672A CN 108556672 A CN108556672 A CN 108556672A CN 201810514596 A CN201810514596 A CN 201810514596A CN 108556672 A CN108556672 A CN 108556672A
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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
-
- 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
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The present invention provides a kind of control method and system of fuel cell hybrid system, and the fuel cell hybrid system includes lithium battery and fuel cell, the method includes：Under the double acting force mode of fuel cell+lithium battery, if travel condition of vehicle changes, fuel cell output power, and the current demand power based on vehicular electric machine dynamical system are maintained, adjusts lithium battery present output power；If the current demand power is more than the setting minimum output power of fuel cell, the current demand power of current state-of-charge and vehicular electric machine dynamical system based on lithium battery calculates the desired output power of fuel cell using multiple target adaptive control algorithm；Based on desired output power, within the predetermined set fuel battery output adjustment time, the real output of smooth adjustment fuel cell.The present invention can make fuel cell even running under different operating conditions, and can effectively improve fuel service efficiency, extend pile service life.
Description
Technical field
The present invention relates to new energy actuation techniques fields, more particularly, to a kind of fuel cell hybrid system
Control method and system.
Background technology
The problems such as environmental pollution, energy crisis, has become the significant challenge that the current mankind face, with new energy technology
It continues to develop, Hydrogen Energy is increasingly becoming various countries' research and development by advantages such as its cleanliness without any pollution, high conversion efficiency and high-energy densities
Hot spot.Meanwhile all kinds of compact cars headed by scenic spot tour bus, golf cart and ferry bus are special due to its working environment
Change, is allowed to have higher dependence to the energy mode except fossil fuel.
It is long, continuous to there is the charging time mostly based on the power form of pure electric vehicle, however in practical applications for conventional small vehicle
The problems such as mileage that navigates is short and deterioration of battery phenomenon is serious causes it to have inconvenience in practical applications more.Also, electric vehicle, which exists, to be turned
The problem of transferring pollution is not proper green energy resource.The development of fuel cell greatly improves lacking for lithium battery
It falling into, can be realized and quickly supplement energy by way of replacing gas cylinder or aerating, high-energy density brings higher course continuation mileage,
Simultaneous reactions process product only has water, ensure that cleanliness without any pollution discharges.
Pure fuel cell power system often cannot be satisfied Vehicular system dynamic since there are certain hysteresis qualitys for chemical reaction
The needs of response.Increase accessory power system of the lithium battery energy storage battery system as entire Vehicular system, can effectively improve whole
The dynamic response of a dynamical system improves the problems such as pure fuel cell power system moment output is short of power, while improving combustion
The working environment for expecting battery, to extending fuel cell service life, improving hydrogen capacity usage ratio etc. has significant work
With.
In the hybrid system control method of traditional fuel cell+lithium battery, according to running conditions of vehicle and battery
The difference of state-of-charge, according to the power forms of distribution and allocation proportion being previously set, by vehicular electric machine demand power in fuel
It is allocated between battery and lithium battery.
But the automobile as being different from the working environment of a kind of compact car such as scenic spot tour bus, golf cart, due to
The features such as its fully loaded handling capacity of passengers is greatly, running environment slope change is big so that its operating condition variation range is larger.And traditional determine
State modulator is difficult to meet the acute variation of operating mode, makes frequent start and stop and excessively violent variable load that can lead to fuel battery service life
It is quick shorten and the decline of performance, be unfavorable for the performance driving economy of fuel cell associated power vehicle.
Invention content
In order to overcome the above problem or solve the above problems at least partly, the present invention provides a kind of fuel cell mixing
The control method and system of dynamical system, use so that fuel cell can the even running under different operating conditions, and effectively
It improves fuel service efficiency and is effectively improved the economical operation of fuel cell associated power vehicle to extend pile service life
Property.
In a first aspect, the present invention provides a kind of control method of fuel cell hybrid system, the fuel cell is mixed
It includes lithium battery and fuel cell to close dynamical system, the method includes：Under the double acting force mode of fuel cell+lithium battery, if
It detects that travel condition of vehicle changes, then keeps fuel cell output power constant, and be based on vehicular electric machine dynamical system
Current demand power, adjust lithium battery present output power；If the current demand power of the vehicular electric machine dynamical system is big
In the setting minimum output power of fuel cell, then the state-of-charge based on lithium battery under present output power and described
The current demand power of vehicular electric machine dynamical system, using multiple target adaptive control algorithm, the expectation for calculating fuel cell is defeated
Go out power；Based on the desired output power, within the predetermined set fuel battery output adjustment time, the reality of smooth adjustment fuel cell
Border output power.
Wherein, the multiple target adaptive control algorithm is specially variable weight state modulator algorithm；Correspondingly, described pass through
The step of variable weight state modulator, the desired output power for calculating fuel cell, further comprises：Practical lotus based on lithium battery
Electricity condition change rate, the corresponding weight parameter for adjusting lithium battery under the double acting force mode of fuel cell+lithium battery；Based on lithium electricity
The weight parameter in pond, the state-of-charge under the lithium battery present output power and the vehicular electric machine dynamical system it is current
Demand power calculates the desired output power of the fuel cell.
Wherein, the practical state-of-charge change rate based on lithium battery, corresponding adjustment fuel cell+lithium battery are double dynamical
The step of weight parameter of lithium battery, further comprises under pattern：Judge the practical state-of-charge change rate of the lithium battery and sets
The magnitude relationship of fixed maximum state-of-charge change rate and the minimum state-of-charge change rate of setting；If the practical state-of-charge variation
Rate is less than the minimum state-of-charge change rate of the setting, then accordingly reduces the state-of-charge weight parameter of lithium battery；If the reality
Border state-of-charge change rate is more than the maximum state-of-charge change rate of the setting, then accordingly increases the state-of-charge weight of lithium battery
Parameter；If the practical state-of-charge change rate is more than the minimum state-of-charge change rate of the setting and less than setting maximum
State-of-charge change rate then maintains the practical state-of-charge weight parameter of lithium battery.
Further, the method further includes：Practical state-of-charge based on lithium battery, it is corresponding to adjust the fuel cell
With the hybrid power operational mode of the lithium battery, the fuel cell hybrid system is made to reach the fuel cell+lithium
The double acting force mode of battery.
Wherein, the practical state-of-charge based on lithium battery, the corresponding adjusting fuel cell and the lithium battery
The step of hybrid power operational mode, further comprises：Set the maximum protection state-of-charge and the charged shape of Minimal Protective of lithium battery
State, and compare the practical state-of-charge and the maximum protection state-of-charge and the Minimal Protective state-of-charge of lithium battery
Magnitude relationship；If the practical state-of-charge is less than the Minimal Protective state-of-charge, controls fuel cell and imitated with maximum
Rate output power charges to lithium battery, until the practical state-of-charge of lithium battery is more than the Minimal Protective state-of-charge；If described
Practical state-of-charge is more than the maximum protection state-of-charge, then controls lithium battery individual output power, until lithium battery is practical
State-of-charge is less than the maximum protection state-of-charge；If the practical state-of-charge be more than the Minimal Protective state-of-charge and
It is less than the maximum protection state-of-charge, then defeated with fuel cell Minimal Protective after setting the fuel cell start-up time
Go out power to be exported.
Further, the method further includes：If the current demand power of the vehicular electric machine dynamical system is less than fuel
The setting minimum output power of battery, then according to the practical state-of-charge of lithium battery, control fuel cell is to set minimum
Output power exports electric energy, alternatively, control lithium battery individual output power, until the practical state-of-charge of lithium battery declines
When setting maximum protection state-of-charge to lithium battery, starting fluid battery, and control fuel cell and exported so that the setting is minimum
Power output electric energy.
Further, the method further includes：In vehicle braking energy regeneration stage, the vehicular electric machine dynamical system is detected
The actual bus voltage of system, and when judging that the actual bus voltage is less than the maximum rated voltage of busbar, control fuel cell
It is charged as lithium battery using the minimum output power output electric energy that sets, otherwise fuel shutoff battery powered.
Second aspect, the present invention provide a kind of control system of fuel cell hybrid system, and the fuel cell is mixed
It includes lithium battery and fuel cell to close dynamical system, and the control system includes：Electrical parameter unit, for obtaining lithium battery reality
State-of-charge, the demand power of vehicular electric machine dynamical system, lithium battery setting state-of-charge change rate parameter, lithium battery setting are protected
Protect state-of-charge, fuel cell setpoint power output, setting fuel cell start-up time and actual bus voltage and busbar electricity
Press rated value；Travel condition of vehicle unit changes for obtaining vehicle current operating conditions and travel condition of vehicle；At data
Unit is managed, for the control method according to fuel cell hybrid system as described above, controls the fuel cell mixing
Dynamical system.
The third aspect, the present invention provide a kind of control device of fuel cell hybrid system, including：It is at least one to deposit
Reservoir, at least one processor, communication interface and bus；The memory, the processor and the communication interface pass through institute
It states bus and completes mutual communication, the communication interface is for the control device and vehicular electric machine dynamical system and the combustion
Expect the information transmission between cell hybrid power system；The calculating that can be run on the processor is stored in the memory
Machine program realizes the control of fuel cell hybrid system as described above when the processor executes the computer program
Method processed.
Fourth aspect, the present invention provide a kind of automobile, including at least a set of fuel cell hybrid system, and as above
The control system of the fuel cell hybrid system or the control device of fuel cell hybrid system；Wherein,
The fuel cell hybrid system includes lithium battery and fuel cell.
The control method and system of a kind of fuel cell hybrid system provided by the invention, by by lithium battery group lotus
Electricity condition and motor demand power are controlled as variable input energy Management Controller by weight coefficient, and fuel electricity is calculated
Pond pile desired output power sets different management strategies in combination with travel condition of vehicle so that system is meeting vehicle peace
Under the premise of full stable operation, fuel cell even running under different operating conditions can be made, and fuel can be effectively improved to make
With efficiency, extend fuel battery service life and working efficiency, improves system economy.
Description of the drawings
Fig. 1 is a kind of flow chart of the control method of fuel cell hybrid system of the embodiment of the present invention；
Fig. 2 is to be mixed according to a kind of fuel cell of control method of fuel cell hybrid system of the embodiment of the present invention
The structural schematic diagram of dynamical system；
Fig. 3 is the flow chart of the control method of another kind fuel cell hybrid system of the embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the control system of fuel cell hybrid system of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of a kind of fuel cell hybrid system of the embodiment of the present invention and its control system；
Fig. 6 is a kind of structure diagram of the control device of fuel cell hybrid system of the embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, is clearly and completely described the technical solution in the present invention, it is clear that described embodiment is one of the present invention
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
In the present circumstance, fuel cell relative cost itself is higher, therefore how to extend the service life of fuel cell
It is an important factor for improving fuel cell associated power vehicle economy.Based on this, as the one side of the embodiment of the present invention,
The present embodiment provides a kind of control method of fuel cell hybrid system, the wherein fuel cell hybrid system includes
Lithium battery and fuel cell are a kind of stream of the control method of fuel cell hybrid system of the embodiment of the present invention with reference to figure 1
Cheng Tu, including：
S1, under the double acting force mode of fuel cell+lithium battery, if detecting, travel condition of vehicle changes, and keeps
Fuel cell output power is constant, and the current demand power based on vehicular electric machine dynamical system, adjusts lithium battery and currently exports
Power；
S2, if the current demand power of vehicular electric machine dynamical system is more than the setting minimum output power of fuel cell,
Based on the current demand power of state-of-charge and vehicular electric machine dynamical system under lithium battery present output power, using more
Objective self-adapting control algolithm calculates the desired output power of fuel cell；
S3 is based on desired output power, within the predetermined set fuel battery output adjustment time, the reality of smooth adjustment fuel cell
Border output power.
It is to be understood that the structure of the fuel cell hybrid system of the embodiment of the present invention is as shown in Fig. 2, for according to this
A kind of structural representation of the fuel cell hybrid system of the control method of fuel cell hybrid system of inventive embodiments
Figure, including：
Electric power supply system of fuel cell 100, electric power supply system of fuel cell include fuel cell pile 101, are based on analog signal
The straight variator 102 of control, fuel cell anti-backflow diode 103, electric power supply system of fuel cell output end 113,114 and lithium
Battery energy storage system output end 213,214 is in parallel；
Lithium battery energy storage battery system 200, lithium battery energy storage battery system includes serial lithium battery group 201, in parallel with lithium battery group
Battery management system 202, output end 213,214 and the electric power supply system of fuel cell output end 113,114 of lithium battery energy storage battery system
It is in parallel；
Motor power system 300, motor power system include an asynchronous motor 302, defeated with lithium battery energy storage battery system
The motor inverter controller 301 of outlet parallel connection, output end 311,312 and the above-mentioned lithium battery energy storage battery system of motor power system
Output end 213,214 is in parallel；
Electrical parameter Acquisition Circuit 400, electrical parameter circuit include electric power supply system of fuel cell output current sensor 401, lithium
Battery energy storage system output voltage sensor 402, sensor signal conditioning circuit 403, for acquiring in hybrid power system
Power is distributed；
Vehicle control system 500, vehicle control system include control unit for vehicle 501, and system communication CAN bus 511 is adopted
Collect driver by throttle, the control signal of the transmission such as brake, and travel condition of vehicle is sent to display screen by CAN bus
And hybrid controller 700；
Auxiliary power supply system 600, auxiliary power supply system input terminal and 213,214 phase of lithium battery energy storage battery system output are simultaneously
Connection, the self-powered for completing control system.
The present embodiment detects hybrid power in step sl when carrying out the control of above-mentioned fuel cell hybrid system
System operating mode and running conditions of vehicle, if it is double dynamical to detect that the hybrid power system operates in fuel cell+lithium battery
It under pattern, and detects that travel condition of vehicle changes, is then acutely loaded to the fuel cell pile service life not to reduce
Profit influences, and fuel cell pile is still remained unchanged by former output power, and lithium battery energy storage battery system output power changes dynamic to meet
Force system demand power.
The double acting force mode of fuel cell+lithium battery therein indicates that output power is vehicle simultaneously for fuel cell and lithium battery
Motor power system power supply.Travel condition of vehicle occurs change and indicates that vehicle needs to jump to another by a kind of operating status
The situation of operating status, such as by the uniform velocity state to variable load acceleration mode.
In step s 2, when lithium battery carries out electric energy output with present output power, vehicular electric machine dynamical system is detected
Current demand power, such as motor demand current can be detected by the input current sensor of motor power system, and led to
Detection motor terminal voltage is crossed, the current demand power of vehicular electric machine dynamical system is calculated.
Then compare size between the current demand power and the setting minimum output power of preset fuel cell to close
System, if judging to know that the current demand power is more than the setting minimum output power, according to the current state-of-charge of lithium battery,
The current demand power of state-of-charge and vehicular electric machine dynamical system i.e. under lithium battery present output power carries out fuel
The calculating of the desired output power of battery.For example, the current state-of-charge and vehicular electric machine dynamical system of lithium battery can be passed through
Current demand power multilevel iudge, calculated using multiple target adaptive control algorithm.
It is understood that above-mentioned multiple target adaptive control algorithm can be VARIABLE PARAMETER PID CONTROL, can also be adaptive
Control, fuzzy adaptivecontroller and other types of self adaptive control mode.In control vehicle fuel cell output power
In algorithm, except Exchanger Efficiency with Weight Coefficient Method also has other multi objective control algorithms that can also complete.
Step S3 it is to be understood that according to above-mentioned steps calculate obtain fuel cell desired output power after, be
Fuel cell pile output power is set smoothly from current output transform to fuel cell pile desired output power, to pre-set
It is output adjustment time of fuel cell, and control fuel cell and preset in the output adjustment time at this, smooth by currently exporting
Power conversion is to desired output power.
By making fuel cell maintain minimum power output, can to avoid in primary operation since power swing causes to fire
Expect battery frequent start-stop, while by carrying out weight calculation to demand power and lithium battery charge state, violent change can be slowed down
Carry the power swing brought to fuel cell.Also, it can be continuously evaluated and be worked as in operation using multiple target adaptive control algorithm
The quality of preceding control effect, to continuous adaptive regulation and control system parameter so that system can be in Wide Range
Variation is lower to keep preferable control effect.
As it can be seen that a kind of control method of fuel cell hybrid system provided in an embodiment of the present invention, by the way that lithium is electric
Pond group state-of-charge and motor demand power are controlled as variable input energy Management Controller by weight coefficient, are calculated
Fuel cell pile desired output power sets different management strategies so that system is meeting in combination with travel condition of vehicle
Under the premise of vehicle safety stable operation, fuel cell even running under different operating conditions can be made, and can effectively improve
Fuel service efficiency extends fuel battery service life and working efficiency, improves system economy.
Wherein optional, above-mentioned multiple target adaptive control algorithm is specially variable weight state modulator algorithm；
Correspondingly, by variable weight state modulator, the step of desired output power for calculating fuel cell, further comprises：
Practical state-of-charge change rate based on lithium battery, it is corresponding to adjust lithium under the double acting force mode of fuel cell+lithium battery
The weight parameter of battery；
Weight parameter based on lithium battery, the state-of-charge under lithium battery present output power and vehicular electric machine dynamical system
The current demand power of system calculates the desired output power of fuel cell.
It is to be understood that the present embodiment according to above-described embodiment when choosing multiple target adaptive control algorithm, it is specific to select
Variable weight state modulator algorithm is taken, and when the desired output power to fuel cell calculates, the period is given by detection
The real output change rate of interior lithium battery, and lithium battery charge state maximum, minimum rate of change are set, judge lithium battery reality
Border change rate location, and reduction, increase or the control strategy for maintaining lithium battery weight coefficient are determined according to different range.
Then, on the basis of obtaining lithium battery weight and lithium battery current state-of-charge, in conjunction with vehicular electric machine dynamical system
The current demand power of system calculates the desired output power of fuel cell.
Wherein, in one embodiment, the practical state-of-charge change rate based on lithium battery, corresponding adjustment fuel cell+
The step of weight parameter of lithium battery, further comprises under the double acting force mode of lithium battery：
Judge that practical state-of-charge change rate and the maximum state-of-charge change rate of setting and setting of lithium battery are minimum charged
The magnitude relationship of status variation rate；
If practical state-of-charge change rate is less than the minimum state-of-charge change rate of setting, corresponding to reduce the charged of lithium battery
State weight parameter；
If practical state-of-charge change rate is more than the maximum state-of-charge change rate of setting, corresponding to increase the charged of lithium battery
State weight parameter；
If practical state-of-charge change rate is more than the minimum state-of-charge change rate of setting and less than the maximum state-of-charge of setting
Change rate then maintains the practical state-of-charge weight parameter of lithium battery.
It is to be understood that according to above-described embodiment, exported more than fuel cell minimum in the current traction requirements power of motor
Power and less than in the case of fuel cell peak power output, according to vehicle actual motion state, to fuel cell and lithium electricity
The weight coefficient in pond is adjusted.Specific setting lithium battery charge state minimum rate of change, the variation of lithium battery charge state maximum
Rate and weight coefficient adjustment time re-start assessment when system operation crosses weight coefficient adjustment time to weight coefficient
It calculates.With specific reference to the practical state-of-charge change rate of lithium battery, following adjustment is carried out to lithium battery weight：
The practical state-of-charge change rate of lithium battery is less than lithium battery charge state minimum rate of change, and fuel cell undertakes excessive
Changed power, lithium battery are not exported effectively, reduce the practical state-of-charge weight coefficient of lithium battery at this time；
The practical state-of-charge change rate of lithium battery is more than lithium battery charge state maximum rate of change, fuel battery power variation
Dynamic response is insufficient, and lithium battery energy storage battery system burden is excessive, increases the practical state-of-charge weight coefficient of lithium battery at this time；
The practical state-of-charge change rate of lithium battery is more than lithium battery charge state minimum rate of change and lithium battery is actually charged
Status variation rate is less than lithium battery charge state maximum rate of change, and electric power supply system of fuel cell divides jointly with lithium battery energy storage battery system
The fluctuation of motor power system power is carried on a shoulder pole, maintains the practical state-of-charge weight coefficient of lithium battery at this time.
Further, on the basis of the above embodiments, this method further includes：Practical state-of-charge based on lithium battery,
The corresponding hybrid power operational mode for adjusting fuel cell and lithium battery, makes fuel cell hybrid system reach fuel cell
The double acting force mode of+lithium battery.
It is to be understood that under the operating conditions such as vehicle launch stage, to avoid the unexpected startup of fuel cell to fuel
The adverse effect of battery considers the smooth variable load for ensureing fuel cell as possible.It is right with specific reference to the practical state-of-charge of lithium battery
The operating status of the adjustment fuel cell and lithium battery answered, and by monitoring lithium battery charge state in real time, it is finally reached fuel
The fuel cell of cell hybrid power system+lithium battery dual output operational mode, the i.e. double acting force mode of fuel cell+lithium battery.
Wherein optional, the mixing of the practical state-of-charge based on lithium battery, corresponding adjusting fuel cell and lithium battery is dynamic
The step of power operational mode, further comprises：
The maximum protection state-of-charge and Minimal Protective state-of-charge of lithium battery are set, and the reality for comparing lithium battery is charged
The magnitude relationship of state and maximum protection state-of-charge and Minimal Protective state-of-charge；
If practical state-of-charge be less than Minimal Protective state-of-charge, control fuel cell with maximal efficiency output power to
Lithium battery charges, until the practical state-of-charge of lithium battery is more than Minimal Protective state-of-charge；
If practical state-of-charge is more than maximum protection state-of-charge, lithium battery individual output power is controlled, until lithium electricity
The practical state-of-charge in pond is less than maximum protection state-of-charge；
If practical state-of-charge is more than Minimal Protective state-of-charge and is less than maximum protection state-of-charge, by setting
After the fuel cell start-up time, exported with fuel cell Minimal Protective output power.
It is to be understood that being protected in the present embodiment by presetting lithium battery Minimal Protective state-of-charge and lithium battery maximum
State-of-charge is protected, the detection practical state-of-charge of lithium battery is whether in normal operation range.According to testing result, had as follows
Body adjusts：
If the practical state-of-charge of lithium battery is less than lithium battery Minimal Protective state-of-charge, vehicle control device, which assigns instruction, makes electricity
Machine runs on traction state, and hybrid controller makes lithium battery error flag set, vehicle control device be sent out to driver at this time
Go out alarm, electric power supply system of fuel cell is with maximal efficiency output power to lithium battery charging until the practical state-of-charge of lithium battery is big
After lithium battery Minimal Protective state-of-charge, lithium battery error flag is removed, closes car alarming；
If the practical state-of-charge of lithium battery is more than lithium battery maximum protection state-of-charge, vehicle control device, which assigns instruction, makes electricity
Machine runs on traction state, at this time not starting fluid battery power supply system, is individually powered from lithium battery energy storage battery system to motor, directly
After being less than lithium battery maximum protection state-of-charge to the practical state-of-charge of lithium battery, starting fluid battery power supply system；
If the practical state-of-charge of lithium battery is more than lithium battery Minimal Protective state-of-charge and is less than lithium battery maximum protection lotus
Electricity condition, vehicle control device, which assigns instruction, makes motor be in traction state, at this time starting fluid battery power supply system, waits for fuel
It is exported with fuel cell Minimal Protective output power after the start battery time.
Further, on the basis of the above embodiments, this method further includes：If the current need of vehicular electric machine dynamical system
It asks power to be less than the setting minimum output power of fuel cell, then according to the practical state-of-charge of lithium battery, controls fuel cell
Electric energy is exported to set minimum output power, alternatively, control lithium battery individual output power, until the charged shape of reality of lithium battery
When state drops to lithium battery setting maximum protection state-of-charge, starting fluid battery, and it is minimum defeated to set to control fuel cell
Go out power output electric energy.
It is to be understood that according to above-described embodiment, it, can after setting the minimum and maximum output power of fuel cell
To judge the magnitude relationship of the current demand power and the setting value of vehicular electric machine dynamical system, it is specifically likely to occur three kinds of feelings
Condition.One of which situation is that the current demand power of vehicular electric machine dynamical system is less than the setting minimum output work of fuel cell
Rate, the output for carrying out lithium battery and fuel cell according to the practical state-of-charge of lithium battery at this time control.Specifically：
When the practical state-of-charge of lithium battery is less than lithium battery maximum protection state-of-charge, electric power supply system of fuel cell is with most
Small-power exports, and lithium battery energy storage battery system is with absorbed power；
When the practical state-of-charge of lithium battery is more than or equal to lithium battery maximum protection state-of-charge, energy management controller is set
Position lithium battery error flag, closes electric power supply system of fuel cell, and cut-out straight convertor output is independent by lithium battery energy storage battery system
Motor power system power supply is given, until lithium battery energy storage battery system state-of-charge drops to lithium battery power supply default state-of-charge
When, starting fluid battery power supply system makes electric power supply system of fuel cell be run with minimum output power.
Further, on the basis of the above embodiments, this method further includes：In vehicle braking energy regeneration stage, inspection
The actual bus voltage of measuring car motor power system, and when judging that actual bus voltage is less than the maximum rated voltage of busbar,
Control fuel cell is charged using setting minimum output power output electric energy as lithium battery, otherwise fuel shutoff battery powered.
It is to be understood that the utilization rate of fuel is the economic factors that another influences fuel cell hybrid system,
In current research, the operating status of fuel cell and the feedback of braking energy are generally considered raising fuel-cell fuel
The important factor in order of utilization rate.The operation shape of fuel cell can be improved for the rational power output section of fuel cell design
State, at the same lithium battery addition so that the fuel cell system of script single energy flow direction exist receive energy feedback can
Energy.How to make fuel cell smoothly run and highly effective and safe receive braking energy be the key that hybrid power system design.
For this purpose, needing to slow down or stop etc. under brake conditions in vehicle, vehicle control device sends out system to electric machine controller
After dynamic instruction, the reversed output power of electric machine controller, motor operation is under generator operation state.It is big according to busbar voltage at this time
It is small, adjust the operating status of lithium battery and fuel cell.It is carried out with specific reference to two following situations：
Busbar voltage is less than busbar maximum voltage, and straight convertor is kept it turned on, and electric power supply system of fuel cell is still pressed
Minimal Protective power output, lithium battery energy storage battery system absorb motor power Braking system regenerating power and electric power supply system of fuel cell
Minimal Protective power, when car speed is zero, motor power Braking system process terminates, and stops output power, fuel cell
By Minimal Protective power output；
Busbar voltage is more than maximum busbar voltage, and braking energy is excessively high at this time, and busbar voltage is more than safe voltage, fragile
Straight convertor and fuel cell pile then close electric power supply system of fuel cell, straight convertor are cut off, by lithium battery energy storage battery system
System individually absorbs braking power, and when car speed is zero, motor power Braking system process terminates.
The present embodiment can ensure that system is realized to having good power performance, high service life and height under various operating modes
Fuel availability realizes energy brake feedback.
For the technical solution further illustrated the present invention, following preferred process flow is provided, but not to the guarantor of the present invention
Shield range is limited.
It is the flow chart of the control method of another kind fuel cell hybrid system of the embodiment of the present invention, packet with reference to figure 3
It includes：
Step 1, System self-test and initializing set fuel cell and lithium battery relevant parameter, and it is real by detecting lithium battery
Border state-of-charge adjusts fuel cell and lithium battery output mode, that is, includes self-checking system operating state, and setting lithium battery is minimum
Protect state-of-charge, lithium battery maximum protection state-of-charge, fuel cell Minimal Protective output power, fuel cell maximum protection
Output power, fuel cell output time, lithium battery error flag, fuel cell error flag, fuel cell start-up time, combustion
Expect battery maximal efficiency output power and system busbar ceiling voltage etc..
Also, the practical state-of-charge of lithium battery is detected whether in normal operation range, testing result includes：1) lithium battery
Practical state-of-charge is less than lithium battery Minimal Protective state-of-charge, and vehicle control device, which assigns instruction, makes motor operation in traction shape
State, at this time hybrid controller so that lithium battery error flag set, vehicle control device is sent out alarm, fuel cell to driver
Power supply system is with maximal efficiency output power to lithium battery charging until the practical state-of-charge of lithium battery is protected more than lithium battery minimum
After protecting state-of-charge, lithium battery error flag is removed, close car alarming and is transferred to step 2；2) the practical state-of-charge of lithium battery
More than lithium battery maximum protection state-of-charge, vehicle control device, which assigns instruction, makes motor operation in traction state, does not start at this time
Electric power supply system of fuel cell is individually powered from lithium battery energy storage battery system to motor, until the practical state-of-charge of lithium battery is less than lithium
After battery maximum protection state-of-charge, starting fluid battery power supply system is simultaneously transferred to step 2；3) the practical state-of-charge of lithium battery is big
In lithium battery Minimal Protective state-of-charge and it is less than lithium battery maximum protection state-of-charge, vehicle control device, which assigns instruction, makes motor
In traction state, starting fluid battery power supply system, is protected after waiting for the fuel cell start-up time with fuel cell minimum at this time
Shield output power is exported, and step 2 is transferred to.
Step 2, electric power supply system of fuel cell desired output power is calculated using method of changing importance coefficient.Vehicle control device is assigned
Instruction makes motor be in traction state, by the motor demand current and the charged shape of current lithium battery group that detect motor power system
State sets the practical state-of-charge initial weight coefficient of lithium battery.According to the current traction requirements power of motor, it is divided into three kinds of situations：
1) the current traction requirements power of motor is more than fuel cell peak power output；2) the current traction requirements power of motor is less than fuel
Battery minimum output power；3) the current traction requirements power of motor is more than fuel cell minimum output power and is less than fuel cell
Peak power output.When testing result belongs to 3) kind situation, it is as follows to carry out weight coefficient calculating：
When setting lithium battery charge state minimum rate of change, lithium battery charge state maximum rate of change and weight coefficient adjustment
Between, when system operation crosses weight coefficient adjustment time, assessment is re-started to weight coefficient and is calculated, there are following three kinds of feelings
Condition：1) the practical state-of-charge change rate of lithium battery is less than lithium battery charge state minimum rate of change, and fuel cell undertakes excessive work(
Rate changes, and lithium battery is not exported effectively, reduces the practical state-of-charge weight coefficient of lithium battery at this time；2) lithium battery is practical
State-of-charge change rate is more than lithium battery charge state maximum rate of change, and fuel battery power changes dynamic response deficiency, lithium electricity
Pond energy-storage system burden is excessive, increases the practical state-of-charge weight coefficient of lithium battery at this time；3) the practical state-of-charge of lithium battery becomes
Rate is more than lithium battery charge state minimum rate of change and the practical state-of-charge change rate of lithium battery is less than lithium battery charge state
Maximum rate of change, electric power supply system of fuel cell share the fluctuation of motor power system power jointly with lithium battery energy storage battery system, at this time
Maintain the practical state-of-charge weight coefficient of lithium battery.
According to practical small electric vehicle accidental conditions, small electric vehicle is after Acceleration of starting process, at the uniform velocity transporting
Row state, at this time motor power module low-power is transferred to by the high power traction state accelerated and maintains traction state or coasting shape
State is transferred to step 3.
Step 3, the power control that travels at the uniform speed stage, the motor needed according to road conditions and load state, vehicle control device
Force system output power will be different.If the current traction requirements power of motor is more than electric power supply system of fuel cell minimum output work
Rate, then return to step 2 calculate fuel cell desired output power；If it is minimum that the current traction requirements power of motor is less than fuel cell
Output power is then divided into two kinds of situations according to the practical state-of-charge of lithium battery：
When the practical state-of-charge of lithium battery is less than lithium battery maximum protection state-of-charge, electric power supply system of fuel cell is with most
Small-power exports, and lithium battery energy storage battery system is with absorbed power.When the practical state-of-charge of lithium battery is protected more than or equal to lithium battery maximum
When protecting state-of-charge, energy management controller set lithium battery error flag closes electric power supply system of fuel cell, cuts off straight become
Parallel operation exports, and motor power system power supply is individually given by lithium battery energy storage battery system, until under lithium battery energy storage battery system state-of-charge
When being down to lithium battery power supply default state-of-charge, starting fluid battery power supply system makes electric power supply system of fuel cell with most
Small output power operation.
When compact car in traveling at the uniform speed when being loaded, acutely load can seriously reduce the fuel cell pile service life, this
When fuel cell pile still remained unchanged by former output power, lithium battery energy storage battery system output power change to meet dynamical system
Demand power, energy management controller calculate electric power supply system of fuel cell desired output power, make fuel cell pile output work
Rate smoothly transforms to fuel cell pile desired output in the variable load time from current fuel cell pile present output power
Power.
Under the state of traveling at the uniform speed, according to the change of actual condition, the working condition of energy management is converted.Work as vehicle control
When device assigns traction instruction, it is transferred to step 2.When vehicle control device assigns braking instruction, it is transferred to step 4.
Step 4, the Brake energy recovery stage.After vehicle control device sends out braking instruction to electric machine controller, motor control
The reversed output power of device, for motor operation under generator operation state, energy management controller receives vehicle control device braking
After instruction, according to busbar voltage size, it is divided into and two kinds of situations occurs：1) busbar voltage is less than busbar maximum voltage, straight transformation
Device is kept it turned on, and electric power supply system of fuel cell still presses Minimal Protective power output, and lithium battery energy storage battery system absorbs motor
Force system brakes regenerating power and electric power supply system of fuel cell Minimal Protective power, when car speed is zero, motor power system
System braking process terminates, and stops output power, and fuel cell presses Minimal Protective power output, is transferred to step 5；2) busbar voltage is big
In maximum busbar voltage, braking energy is excessively high at this time, and busbar voltage is more than safe voltage, fragile straight convertor and fuel electricity
Pond pile then closes electric power supply system of fuel cell, cuts off straight convertor, individually absorbs braking work by lithium battery energy storage battery system
Rate, when car speed is zero, motor power Braking system process terminates, and is transferred to step 5.
Step 5, delay switching-off controls.After vehicle stops, lithium battery energy storage battery system state-of-charge is detected, when lithium battery stores up
When energy system state-of-charge is less than lithium battery energy storage battery default state-of-charge, fuel cell pile is with fuel cell peak efficiency
Power output, until lithium battery energy storage battery system state-of-charge reaches lithium battery energy storage battery default state-of-charge, fuel cell turns
For fuel cell Minimal Protective power output and enter shutdown waiting.To prevent the fuel cell caused by waiting from opening
Stop, after waiting for the fuel cell delay switching-off time, closes fuel cell pile, cut off straight convertor, and in next vehicle control
Device processed is transferred to step 1 after sending out traction instruction.
As the other side of the embodiment of the present invention, the present embodiment sets up one according to the control method of above-described embodiment
The control system of kind fuel cell hybrid system, wherein fuel cell hybrid system include lithium battery and fuel electricity
Pond is a kind of structural schematic diagram of the control system of fuel cell hybrid system of the embodiment of the present invention with reference to figure 4, including：
Electrical parameter unit 1, travel condition of vehicle unit 2 and data processing unit 3.Wherein,
Electrical parameter unit 1 is for obtaining the practical state-of-charge of lithium battery, the demand power of vehicular electric machine dynamical system, lithium electricity
Pond sets state-of-charge change rate parameter, lithium battery setting protection state-of-charge, fuel cell setpoint power output, setting fuel
Start battery time and actual bus voltage and busbar voltage rated value；Travel condition of vehicle unit 2 is worked as obtaining vehicle
Preceding operating status and travel condition of vehicle change；Data processing unit 3 is used for according to the fuel electricity as described in above-described embodiment
The control method of pond hybrid power system controls fuel cell hybrid system.
It is understood that the system is in the above embodiments controlling fuel cell hybrid system
System.Therefore, the description and definition in the control method of the various embodiments described above fuel cell hybrid system can be used for this
The understanding of each execution unit in inventive embodiments.
As shown in Fig. 2, fuel cell hybrid system uses the straight convertor 102 of analog signal control, raising pair
The control accuracy of 100 output current of electric power supply system of fuel cell is realized and adjusts fuel battery power output control using hardware means
Delay parameter processed can be used for controlling the fuel cell pile of different model specification.
The embodiment of the present invention is in the basis of above-mentioned fuel cell hybrid system, upper setting fuel cell hybrid system
The control system 700 of system, such as can be the energy management unit based on STM32 controllers.Fuel cell hybrid system
Control system 700 receive the electrical parameter information of the feedback of electrical parameter Acquisition Circuit 400, and fuel is obtained by energy management algorithm
Battery power supply system desired output power controls letter by the straight convertor 102 that analog signal output to analog signal controls
Number input terminal, and by vehicle operating information, 200 state-of-charge of lithium battery energy storage battery system, motor power system 300 demand electricity
Amount is analyzed, and 100 desired output power of fuel cell power system is obtained, to state-of-charge and motor power system requirements work(
Rate carry out double -loop control, with meet vehicle aerodynamic power and lithium battery it is shallow fill it is shallow put, extension service life of lithium battery.
Further it will be understood that hardware processor (hardware can be passed through in the embodiment of the present invention
Processor) associated execution unit is realized.
The control system of a kind of fuel cell hybrid system provided in an embodiment of the present invention, by the way that relevant hold is arranged
Row unit using lithium battery group state-of-charge and motor demand power as variable input energy Management Controller, and passes through weight
Coefficient controls, and calculates fuel cell pile desired output power, sets different management strategies in combination with travel condition of vehicle, makes
The system of obtaining can make fuel cell even running under different operating conditions under the premise of meeting vehicle safety stable operation,
And fuel service efficiency can be effectively improved, extend fuel battery service life and working efficiency, improves system economy.
In order to further illustrate the technical solution of the embodiment of the present invention, in conjunction with Fig. 5 to the structure of system of the embodiment of the present invention
Composition illustrates.It is the structure of a kind of fuel cell hybrid system of the embodiment of the present invention and its control system with reference to figure 5
Schematic diagram, including：Hybrid power electricity generation system 010, Energy Management System 020, motor power system 030 and people's car mutual system
040.Wherein hybrid power system 010 include fuel cell pile 101, it is lithium battery group 201, fuel cell controller 104, straight straight
Converter 102, battery management system 202 and auxiliary power supply system 601.Energy Management System 020 includes the energy based on STM32
Administrative unit 701, electric parameter measurement unit 401 and CAN communication unit 702.Motor power system 030 includes electric machine controller
301 and motor 302.People's car mutual system 040 includes vehicle control system 501, display system 502 and vehicle control device 503.
The embodiment of the present invention adjusts the parameter in weight coefficient control in real time using VARIABLE PARAMETER PID CONTROL method, by the way that lithium is electric
Pond group state-of-charge, motor demand power calculate fuel cell pile desired output as variable input energy Management Controller
Power, and by dynamic evaluation travel condition of vehicle, different management strategies is used according to travel condition of vehicle, maintain fuel electricity
Heap stable output power and lithium battery group state-of-charge are stablized, and so that vehicle is reached even running under complex working condition, lithium battery is shallow
Fill it is shallow put, the gentle variable load of fuel cell.Also, according to demand power is met, minimum output power is set for fuel cell, is avoided
The service life reduction that fuel cell frequent start-stop is brought when motor demand power fluctuates.
Wherein, by the way that vehicle operation is divided into traction acceleration, is traveled at the uniform speed and three kinds of states of regenerative braking, and according to difference
Travel condition of vehicle and lithium battery energy storage battery system state-of-charge switch different control strategies, can meet vehicle operation power
Demand, and can smoothly be switched in various states, realize that fuel cell high efficiency, high life utilize, lithium battery safety
Reliability service improves safety, the economy of vehicle.
In addition, being support vehicles operational safety, electric power supply system of fuel cell peak power output, lithium battery energy storage battery system are set
System maximum, minimum state-of-charge, real-time detecting system busbar voltage simultaneously have corresponding failure warning function.
As the another aspect of the embodiment of the present invention, the present embodiment provides a kind of controls of fuel cell hybrid system
Device processed is a kind of structure diagram of the control device of fuel cell hybrid system of the embodiment of the present invention, packet with reference to figure 6
It includes：At least one processor 61, at least one processor 62, communication interface 63 and bus 64.
Wherein, memory 61, processor 62 and communication interface 63 complete mutual communication, communication interface by bus 64
63 for the information transmission between the control device and vehicular electric machine dynamical system and fuel cell hybrid system；Memory
It is stored with the computer program that can be run on the processor 62 in 61, when processor 62 executes the computer program, realizes such as
The control method of fuel cell hybrid system described in above-described embodiment.
It is to be understood that including at least memory 61, place in the control device of the fuel cell hybrid system
Manage device 62, communication interface 63 and bus 64, and memory 61, processor 62 and communication interface 63 by bus 64 formed it is mutual it
Between communication connection, and mutual communication can be completed.
Communication interface 63 realizes control device and the vehicular electric machine dynamical system of fuel cell hybrid system and described
Communication connection between fuel cell hybrid system, and mutual information transmission can be completed, it is such as real by communication interface 63
Now lithium battery loaded-up condition is obtained, and the control instruction transmission etc. to fuel cell hybrid system.
When the control device operation of fuel cell hybrid system, processor 62 calls the program in memory 61 to refer to
It enables, to execute the method that above-mentioned each method embodiment is provided, such as including：Under the double acting force mode of fuel cell+lithium battery,
If detecting, travel condition of vehicle changes, and keeps fuel cell output power constant, and is based on vehicular electric machine dynamical system
The current demand power of system adjusts lithium battery present output power；And the practical state-of-charge based on lithium battery, it is corresponding to adjust
The hybrid power operational mode of the fuel cell and the lithium battery makes the fuel cell hybrid system reach described
Double acting force mode of fuel cell+lithium battery etc..
In another embodiment of the present invention, a kind of non-transient computer readable storage medium is provided, the non-transient computer
Readable storage medium storing program for executing stores computer instruction, which makes computer execute the fuel cell as described in above-described embodiment
The control method of hybrid power system.
It is to be understood that the logical order in above-mentioned memory 61 can be realized simultaneously by the form of SFU software functional unit
When sold or used as an independent product, it can be stored in a computer read/write memory medium.Alternatively, realizing above-mentioned
The all or part of step of embodiment of the method can be completed by the relevant hardware of program instruction, and program above-mentioned can store
In a computer read/write memory medium, which when being executed, executes step including the steps of the foregoing method embodiments；And it is aforementioned
Storage medium include：The various media that can store program code such as USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD.
The embodiment of the control device of fuel cell hybrid system described above is only schematical, wherein
The unit illustrated as separating component may or may not be physically separated, and can both be located at a place, or
Person may be distributed on heterogeneous networks unit.Some or all of module therein can be selected to realize according to actual needs
The purpose of this embodiment scheme.Those of ordinary skill in the art are not in the case where paying performing creative labour, you can to understand
And implement.
By the description of embodiment of above, those skilled in the art is it will be clearly understood that each embodiment can borrow
Help software that the mode of required general hardware platform is added to realize, naturally it is also possible to pass through hardware.Based on this understanding, above-mentioned
Substantially the part that contributes to existing technology can be expressed in the form of software products technical solution in other words, the meter
Calculation machine software product can store in a computer-readable storage medium, such as USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or light
Disk etc., including some instructions, with so that a computer equipment (such as personal computer, server or network equipment etc.)
Execute the method described in certain parts of above-mentioned each method embodiment or embodiment of the method.
A kind of control device of fuel cell hybrid system provided in an embodiment of the present invention and a kind of non-transient calculating
Machine readable storage medium storing program for executing, by regarding lithium battery group state-of-charge and motor demand power as variable input energy management control
Device, and controlled by weight coefficient, fuel cell pile desired output power is calculated, not in combination with travel condition of vehicle setting
Same management strategy so that system can make fuel cell in different operation works under the premise of meeting vehicle safety stable operation
Even running under condition, and fuel service efficiency can be effectively improved, extend fuel battery service life and working efficiency, improves systematic economy
Property.
As another aspect of the embodiment of the present invention, the present embodiment provides a kind of automobiles, including at least a set of fuel electricity
Pond hybrid power system, and the control system of fuel cell hybrid system as described in above-described embodiment or fuel electricity
The control device of pond hybrid power system；Wherein, fuel cell hybrid system includes lithium battery and fuel cell.
An example according to the ... of the embodiment of the present invention is as follows, and a kind of fuel cell hybrid tour bus is adopted in the design
Fuel cell hybrid system is formed with 3KW fuel cell piles and 200AH60V lithium battery groups, the electricity carried for vehicle body
Machine provides power.Vehicle is furnished with the hydrogen gas bomb of 35MP28L, is more than national regulation in testing up to fully loaded 40KM/h
Electric sightseeing vehicle speed 30KM/h, meets power demand.
Meanwhile the power distribution and Brake energy recovery of fuel cell and lithium battery are realized by energy management algorithm, continue
Mileage navigate up to 50KM or more.To the higher natural scenic spot of emission requirement, this fuel cell hybrid is gone sightseeing
Disposal of pollutants is both not present in vehicle, and pollution transportation problem is also not present, while the tourist for carrying out scenic spot visit can be allowed to experience following new
The glamour of energy technology improves scenic spot attraction.
A kind of automobile provided in an embodiment of the present invention can make fuel under the premise of meeting vehicle safety stable operation
Battery even running under different operating conditions, and fuel service efficiency can be effectively improved, extend fuel battery service life and work
Efficiency improves system economy.
In summary, the control method and system of a kind of fuel cell hybrid system provided by the invention, by right
Fuel cell desired output power carries out variable weight coefficient control so that fuel cell can be under various operating conditions smoothly
Operation improves fuel service efficiency, extends pile service life.Lithium battery energy storage battery system is added as auxiliary power source, improves
Vehicle runnability, while realizing the absorption to feedback braking energy.In addition, compact car working condition is divided into traction
Accelerate, travel at the uniform speed and three states of retarding braking, and motor demand power and lithium battery charge state are detected as variable
And pass to energy management controller so that be constantly varied with control strategy in vehicle operation.
Since this patent control method is complex, control is computationally intensive, and simultaneously for acquisition information, communication etc. has
It is certain to require, therefore use STM32 microcontrollers as Master control chip, pass through CAN bus and battery management system, motor control
Device and vehicle control device are communicated, by the straight convertor that is controlled by analog signal by fuel cell and power generatrix phase
Even, ensure control precision and response speed, using dynamic lithium battery as auxiliary energy storage system, improve instantaneous power export and
Realize energy regenerating.Comprehensive various kinds of equipment and control strategy advantage realize the purpose of high economy operation.
In addition, those skilled in the art it should be understood that the present invention application documents in, term " comprising ",
"comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process including a series of elements,
Method, article or equipment include not only those elements, but also include other elements that are not explicitly listed, or are also wrapped
It includes as elements inherent to such a process, method, article, or device.In the absence of more restrictions, by sentence " including
One ... " limit element, it is not excluded that there is also another in the process, method, article or apparatus that includes the element
Outer identical element.
In the specification of the present invention, numerous specific details are set forth.It should be understood, however, that the embodiment of the present invention can
To put into practice without these specific details.In some instances, well known method, structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this description.Similarly, it should be understood that disclose in order to simplify the present invention and helps to understand respectively
One or more of a inventive aspect, in the above description of the exemplary embodiment of the present invention, each spy of the invention
Sign is grouped together into sometimes in single embodiment, figure or descriptions thereof.
However, the method for the disclosure should be construed to reflect following intention：That is the claimed invention requirement
The more features of feature than being expressly recited in each claim.More precisely, as claims are reflected
Like that, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows the power of specific implementation mode
Thus sharp claim is expressly incorporated in the specific implementation mode, wherein independent reality of each claim as the present invention itself
Apply example.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, and those skilled in the art should understand that：It still can be right
Technical solution recorded in foregoing embodiments is modified or equivalent replacement of some of the technical features；And this
A little modification or replacements, the spirit and model of various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. a kind of control method of fuel cell hybrid system, the fuel cell hybrid system include lithium battery and
Fuel cell, which is characterized in that the method includes：
Under the double acting force mode of fuel cell+lithium battery, if detecting, travel condition of vehicle changes, and keeps fuel cell
Output power is constant, and the current demand power based on vehicular electric machine dynamical system, adjusts lithium battery present output power；
If the current demand power of the vehicular electric machine dynamical system is more than the setting minimum output power of fuel cell, it is based on
The current demand power of state-of-charge and the vehicular electric machine dynamical system of the lithium battery under present output power utilizes
Multiple target adaptive control algorithm calculates the desired output power of fuel cell；
Based on the desired output power, within the predetermined set fuel battery output adjustment time, the reality of smooth adjustment fuel cell
Output power.
2. according to the method described in claim 1, it is characterized in that, the multiple target adaptive control algorithm is specially variable weight
State modulator algorithm；
Correspondingly, described by variable weight state modulator, the step of desired output power for calculating fuel cell, further comprises：
Practical state-of-charge change rate based on lithium battery, it is corresponding to adjust lithium battery under the double acting force mode of fuel cell+lithium battery
Weight parameter；
Weight parameter based on the lithium battery, the state-of-charge under the lithium battery present output power and the vehicle electrical
The current demand power of motor-driven Force system calculates the desired output power of the fuel cell.
3. according to the method described in claim 2, it is characterized in that, the practical state-of-charge change rate based on lithium battery,
The step of weight parameter of lithium battery, further comprises under the corresponding adjustment double acting force mode of fuel cell+lithium battery：
Judge that practical state-of-charge change rate and the maximum state-of-charge change rate of setting and setting of the lithium battery are minimum charged
The magnitude relationship of status variation rate；
If the practical state-of-charge change rate is less than the minimum state-of-charge change rate of the setting, corresponding reduction lithium battery
State-of-charge weight parameter；
If the practical state-of-charge change rate is more than the maximum state-of-charge change rate of the setting, corresponding increase lithium battery
State-of-charge weight parameter；
If the practical state-of-charge change rate is more than the minimum state-of-charge change rate of the setting and less than setting maximum
State-of-charge change rate then maintains the practical state-of-charge weight parameter of lithium battery.
4. according to the method described in claim 1, it is characterized in that, further including：
Practical state-of-charge based on lithium battery, the corresponding hybrid power operation mould for adjusting the fuel cell and the lithium battery
Formula makes the fuel cell hybrid system reach the double acting force mode of fuel cell+lithium battery.
5. according to the method described in claim 4, it is characterized in that, the practical state-of-charge based on lithium battery, corresponding to adjust
The step of hybrid power operational mode for saving the fuel cell and the lithium battery, further comprises：
The maximum protection state-of-charge and Minimal Protective state-of-charge of lithium battery are set, and the reality for comparing lithium battery is charged
The magnitude relationship of state and the maximum protection state-of-charge and the Minimal Protective state-of-charge；
If the practical state-of-charge is less than the Minimal Protective state-of-charge, fuel cell is controlled with maximal efficiency output work
Rate charges to lithium battery, until the practical state-of-charge of lithium battery is more than the Minimal Protective state-of-charge；
If the practical state-of-charge is more than the maximum protection state-of-charge, lithium battery individual output power is controlled, until
The practical state-of-charge of lithium battery is less than the maximum protection state-of-charge；
If the practical state-of-charge is more than the Minimal Protective state-of-charge and is less than the maximum protection state-of-charge,
After setting the fuel cell start-up time, exported with fuel cell Minimal Protective output power.
6. according to the method described in claim 1, it is characterized in that, further including：
If the current demand power of the vehicular electric machine dynamical system is less than the setting minimum output power of fuel cell,
According to the practical state-of-charge of lithium battery, control fuel cell exports electric energy to set minimum output power, alternatively, control lithium electricity
Pond individual output power, until the practical state-of-charge of lithium battery drops to lithium battery setting maximum protection state-of-charge
When, starting fluid battery, and control fuel cell and electric energy is exported with the setting minimum output power.
7. according to the method described in claim 6, it is characterized in that, further including：
In vehicle braking energy regeneration stage, the actual bus voltage of the vehicular electric machine dynamical system is detected, and judging
When stating actual bus voltage less than the maximum rated voltage of busbar, control fuel cell is electric with setting minimum output power output
It can charge for lithium battery, otherwise fuel shutoff battery powered.
8. a kind of control system of fuel cell hybrid system, the fuel cell hybrid system include lithium battery and
Fuel cell, which is characterized in that the control system includes：
Electrical parameter unit is set for obtaining the practical state-of-charge of lithium battery, the demand power of vehicular electric machine dynamical system, lithium battery
Determine state-of-charge change rate parameter, lithium battery setting protection state-of-charge, fuel cell setpoint power output, setting fuel cell
Start time and actual bus voltage and busbar voltage rated value；
Travel condition of vehicle unit changes for obtaining vehicle current operating conditions and travel condition of vehicle；
Data processing unit, for according to the control method as described in any in claim 1-7, it is mixed to control the fuel cell
Close dynamical system.
9. a kind of control device of fuel cell hybrid system, which is characterized in that including：At least one processor, at least
One processor, communication interface and bus；
The memory, the processor and the communication interface complete mutual communication, the communication by the bus
Interface is passed for the information between the control device and vehicular electric machine dynamical system and the fuel cell hybrid system
It is defeated；
The computer program that can be run on the processor is stored in the memory, the processor executes the calculating
When machine program, the control method as described in any in claim 1 to 7 is realized.
10. a kind of automobile, which is characterized in that including at least a set of fuel cell hybrid system, and such as claim 8 institute
The control system stated or control device as claimed in claim 9；Wherein, the fuel cell hybrid system includes lithium
Battery and fuel cell.
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