CN113525107B - Control method and system for working power of fuel cell system of fuel cell passenger car - Google Patents

Control method and system for working power of fuel cell system of fuel cell passenger car Download PDF

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Publication number
CN113525107B
CN113525107B CN202110570980.9A CN202110570980A CN113525107B CN 113525107 B CN113525107 B CN 113525107B CN 202110570980 A CN202110570980 A CN 202110570980A CN 113525107 B CN113525107 B CN 113525107B
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fuel cell
state
cell system
power
state switching
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CN113525107A (en
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黄兴
郑丽萍
文江涛
蔡志锐
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Wuhan Bus Manufacturing Co ltd
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Wuhan Bus Manufacturing Co ltd
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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
    • 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
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • 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
    • 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
    • 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 invention provides a control method and a system for the working power of a fuel cell system of a fuel cell passenger car, which are used for formulating and generating a state switching strategy of the fuel cell system based on control parameter values; collecting various data of the vehicle in real time, calculating control parameter values according to the various data of the vehicle, and judging whether a state switching condition is met according to a calculation result; when the calculation result meets any state switching condition, controlling the fuel cell system to perform corresponding state switching; the state switching strategy of the fuel cell system is made by comprehensively considering the energy consumption requirement of the vehicle and the working efficiency of the fuel cell system, so that the working power of the fuel cell system can be controlled based on the actual energy requirement of the vehicle, the fuel cell system can work in a relatively high-efficiency power region based on the current energy requirement state of the vehicle when in operation, the switching of different powers and the frequent start and stop are avoided, the conversion efficiency of hydrogen fuel is improved, and the service life of the fuel cell system is prolonged.

Description

Control method and system for working power of fuel cell system of fuel cell passenger car
Technical Field
The invention relates to the technical field of fuel cell automobile control, in particular to a method and a system for controlling the working power of a fuel cell system of a fuel cell passenger car.
Background
The rapid development of new energy automobile industry in China lays a good foundation for the development of fuel cell automobiles, and compared with pure electric automobiles, the fuel cell automobiles taking hydrogen as fuel have superior environmental protection performance, and the problems of insufficient endurance mileage and long charging time of the pure electric automobiles are overcome.
The fuel cell passenger car uses the fuel cell engine as a power source, and the vehicle is matched with the power cell system as an energy storage device in order to balance the required power of the power system. For better economy, the rated power of the fuel cell system is generally smaller than the power of the battery, the power of the fuel cell cannot meet the peak power requirement of the motor, the fuel cell is generally used as energy supply of the system for supplementing the energy balance of the vehicle power system, and the power balance is realized by the power cell.
The fuel cell operation energy flow direction has unidirectionality, the operation response speed is slow under the prior art, and the vehicle required power is dynamically and rapidly changed, so that the fuel cell operation power adjustment to respond to the dynamic required power of the vehicle is difficult to realize.
The power control of fuel cells by prior art or general fuel cell passenger cars is mostly based on the SOC of the cell and the power demand of the vehicle motor to control the start-stop and operating power of the fuel cell system.
Because the prior art controls the working power of the fuel cell based on the state of battery SOC or the power requirement of the vehicle, the general conditions are that the battery SOC is low, the power requirement of the vehicle motor is high, the working power of the fuel cell is relatively large, the battery SOC is high, the power requirement of the vehicle motor is small, the working power of the fuel cell is relatively small, the working efficiency of the fuel cell, the service life of the fuel cell and the charge and discharge capacity of the battery are difficult to comprehensively consider, so that the fuel cell system is frequently switched and started and stopped at different powers, and the conversion efficiency of hydrogen fuel is low.
Disclosure of Invention
The invention aims to overcome the technical defects, and provides a control method and a control system for the working power of a fuel cell system of a fuel cell passenger car, which solve the problems that the working power setting of the existing fuel cell is difficult to comprehensively consider the energy consumption requirement of the vehicle and the working efficiency of the fuel cell system, so that the fuel cell system is frequently switched and frequently started and stopped at different powers, and the conversion efficiency of hydrogen fuel is low.
In order to achieve the technical purpose, the invention provides a control method of the working power of a fuel cell system of a fuel cell passenger car, which comprises the following steps:
based on the integrated operation value C of the total current of the fuel cell system after entering each state and the latest 30 seconds of the total current of the fuel cell system after entering each state _30s SOC value of battery, charge power P affordable in current state of battery c The four control parameter values are formulated to generate a fuel cell system state switching strategy;
collecting various data of a vehicle in real time, calculating an integral operation value of the total current of the battery after the fuel cell system enters each state according to the various data of the vehicle, and calculating a latest 30-second integral operation value C of the total current of the battery after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c Judging whether the state switching condition is met according to the calculation result;
and when the calculation result meets any state switching condition, controlling the fuel cell system to perform corresponding state switching.
The invention also provides a control system of the working power of the fuel cell system of the fuel cell passenger car, which comprises the following functional modules:
a strategy formulation module for integrating the calculated value of the total current of the battery based on the state of the fuel cell system, and integrating the calculated value C of the total current of the battery for 30 seconds after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c The four control parameter values are formulated to generate a fuel cell system state switching strategy;
the calculation and judgment module is used for collecting various data of the vehicle in real time, calculating an integral operation value of the total current of the battery after the fuel cell system enters each state according to the various data of the vehicle, and calculating an integral operation value C of the total current of the battery for 30 seconds after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c Judging whether the state switching condition is met according to the calculation result;
and the state switching module is used for controlling the fuel cell system to perform corresponding state switching when the calculation result meets any state switching condition.
Compared with the prior art, the method and the device have the advantages that the state switching strategy of the fuel cell system is made by comprehensively considering the energy consumption requirement of the vehicle and the working efficiency of the fuel cell system, so that the working power of the fuel cell system can be controlled based on the actual energy requirement of the vehicle, the fuel cell system can work in a relatively high-efficiency power region based on the current energy requirement state of the vehicle when in work, different power switching and frequent starting and stopping are avoided, the conversion efficiency of hydrogen fuel is improved, and the service life of the fuel cell system is prolonged.
Drawings
FIG. 1 is a flow chart of a method for controlling the operating power of a fuel cell system of a fuel cell passenger car according to an embodiment of the invention;
FIG. 2 is a block diagram of a sub-process of step S1 of FIG. 1;
fig. 3 is a block diagram of a control system for operating power of a fuel cell system of a fuel cell passenger car according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a method for controlling the operating power of a fuel cell system of a fuel cell passenger car, which includes the steps of:
s1, integrating an operation value on the total current of the battery after the fuel cell system enters each state, and integrating an operation value C on the latest 30 seconds of the total current of the battery after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c And the four control parameter values are formulated to generate a fuel cell system state switching strategy.
Wherein the integral operation value of the total current of the fuel cell system after entering each state is used for measuring the fuel cellUnder power operating conditions when a state is entered, whether the total charge of the vehicle power battery is increasing or decreasing relative to the rated charge of the battery (negative meaning increasing, positive meaning decreasing, C) r Is the rated capacity of the battery), the amount of increase and decrease. The latest 30 seconds of integral operation value C of the total current of the fuel cell system after the fuel cell system enters each state _30s Under the power operating condition for measuring the fuel cell entering a certain state, the total electric quantity of the vehicle power battery is increased or decreased for the last 30 seconds (a negative value indicates that the electric quantity of the battery is increased, and a positive value indicates that the electric quantity of the battery is decreased), and the change trend of the electric quantity of the battery for the last 30 seconds is measured. The SOC value of the battery is used for setting a threshold value for judging that the fuel battery enters different powers. Charging power P bearable in the current state of the battery c For checking whether the fuel cell is to be put into operation at the next power, the power cell can withstand operation at the next continuous charging power.
And manufacturing and generating a fuel cell system state switching strategy in the matlab system, and guiding the fuel cell system state switching strategy into the whole vehicle controller. As shown in fig. 2, the method for making the state switching strategy of the fuel cell system includes the following steps:
s11, setting various working states of the fuel cell system;
the working state of the fuel cell system can be set according to the working environment and the working requirement of the vehicle, the invention exemplifies different working powers of 5 fuel cells, each working power fuel cell controller FCU carries out the optimized calibration of system parameters, and the whole vehicle controller selects the different working powers of the fuel cells to work according to the requirement of the vehicle. In general, the fuel cells have different corresponding operating efficiencies under different operating powers, the efficiencies of the electric stacks of the fuel cells are different under different load rates, the accessories (such as an air compressor) of the fuel cell system consume a great part of energy, and the energy consumption of the accessories is not in a linear relation with the operating power of the electric stacks, so that the operating efficiencies of the fuel cells are greatly different under different powers, the operating efficiency of the general fuel cells is relatively low between the lower power and the maximum power accessory, and the operating efficiency of the fuel cells is relatively high in the middle section of the operating power of the fuel cells.The scheme is based on 5 working states of the fuel cell system under different working powers, wherein states 1 to 5 correspond to different working powers P respectively 1 、P 2 、P 3 、P 4 、P 5 And P is 5 >P 4 >P 3 >P 2 >P 1 The method comprises the steps of carrying out a first treatment on the surface of the The corresponding working efficiency is eta 1 、η 2 、η 3 、η 4 、η 5 (η 3 >η 2 >η 1 、η 3 >η 4 >η 5 ) The operation efficiency of the fuel cell system is relatively high in the middle section, and the operation efficiency of the high power and the low power is relatively low.
S12, based on the integral operation value of the total current of the battery after the fuel cell system enters each state, and the latest 30 seconds integral operation value C of the total current of the battery after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c A plurality of state switching conditions are set.
According to the above-set 5 operating states of the fuel cell system, the state switching conditions are set correspondingly as follows:
state switching condition 1 expression:
(C _all <-0.05C r ) And (C) _30s <0) And (SOC)>85%) and (P 1 ≤P c )；
State switching condition 2 expression:
(C _all >0.05C r ) And (C) _30s >0) And (SOC)<80%) and (P 2 ≤P c )；
State switching condition 3 expression:
(C _all <-0.4C r ) And (C) _30s <0) And (SOC)>80%) and (P 2 ≤P c )
State switching condition 4 expression:
(C _all >0.05C r ) And (C) _30s >0) And (SOC)<75%) and (P 3 ≤P c )；
State switching condition 5 expression:
(C _all <-0.05C r ) And (C) _30s <0) And (SOC)>40%) and (P 3 ≤P c )
State switching condition 6 expression:
(C _all >0.4C r ) And (C) _30s >0) And (SOC)<35%) and (P 4 ≤P c )；
State switching condition 7 expression:
(C _all <-0.05C r ) And (C) _30s <0) And (SOC)>35%) and (P 4 ≤P c )
State switching condition 8 expression:
(C _all >0.05C r ) And (C) _30s >0) And (SOC)<30%) and (P 5 ≤P c )。
S13, setting each state switching condition to correspond to the working state switching action of one fuel cell system.
Specifically, the starting condition of the fuel cell system is that the SOC is less than 50%, and the shutdown condition is that: SOC >90%.
Default into P when the fuel cell system is powered on 3 A power operating state;
when the four control parameter values satisfy the state switching condition 3, the fuel cell system is operated from P 3 Switching power operation state to P 2 A power operating state;
when the four control parameter values satisfy the state switching condition 1, the fuel cell system is operated from P 2 Switching power operation state to P 1 A power operating state;
when the four control parameter values satisfy the state switching condition 2, the fuel cell system is operated from P 1 Switching power operation state to P 2 A power operating state;
when the four control parameter values satisfy the state switching condition 4, the fuel cell system is operated from P 2 Switching power operation state to P 3 A power operating state;
when the house is atWhen the four control parameter values meet the state switching condition 6, the fuel cell system is self-P 3 Switching power operation state to P 4 A power operating state;
when the four control parameter values satisfy the state switching condition 8, the fuel cell system is operated from P 4 Switching power operation state to P 5 A power operating state;
when the four control parameter values satisfy the state switching condition 7, the fuel cell system is operated from P 5 Switching power operation state to P 4 A power operating state;
when the four control parameter values satisfy the state switching condition 5, the fuel cell system is operated from P 4 Switching power operation state to P 3 Power operating state.
S2, collecting various data of the vehicle in real time, calculating an integral operation value of the total current of the battery after the fuel cell system enters each state according to the various data of the vehicle, and calculating a latest 30-second integral operation value C of the total current of the battery after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c Judging whether the state switching condition is met according to the calculation result;
and S3, when the calculation result meets any state switching condition, controlling the fuel cell system to perform corresponding state switching.
The invention relates to a control method of the working power of a fuel cell system of a fuel cell passenger car, which is characterized in that a fuel cell system state switching strategy is made by comprehensively considering the energy consumption requirement of a vehicle and the working efficiency of the fuel cell system, so that the working power of the fuel cell system can be controlled based on the actual energy requirement of the vehicle, the fuel cell system can work in a relatively high-efficiency power region based on the current energy requirement state of the vehicle when in work, the switching of different powers and the frequent start and stop are avoided, the conversion efficiency of hydrogen fuel is improved, and the service life of the fuel cell system is prolonged.
Based on the above-mentioned control method of the operating power of the fuel cell system of the fuel cell passenger car, the invention also provides a control system of the operating power of the fuel cell system of the fuel cell passenger car, as shown in fig. 3, which comprises the following functional modules:
a strategy making module 10 for integrating the operation value C based on the total current of the fuel cell system after each state, and the latest 30 seconds of the total current of the fuel cell system after each state _30s SOC value of battery, charge power P affordable in current state of battery c The four control parameter values are formulated to generate a fuel cell system state switching strategy;
the calculation and judgment module 20 is used for collecting various data of the vehicle in real time, calculating an integral operation value of the total current of the battery after the fuel cell system enters each state according to the various data of the vehicle, and calculating an integral operation value C of the total current of the battery for 30 seconds after the fuel cell system enters each state _30s SOC value of battery, charge power P affordable in current state of battery c Judging whether the state switching condition is met according to the calculation result;
and the state switching module 30 is used for controlling the fuel cell system to perform corresponding state switching when the calculation result meets any state switching condition.
The execution mode of the control system for the operating power of the fuel cell system of the fuel cell passenger car in this embodiment is basically the same as that of the control method for the operating power of the fuel cell system of the fuel cell passenger car, so detailed description will not be repeated.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the modules, units, and/or method steps of the various embodiments described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or as a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. The method for controlling the working power of the fuel cell system of the fuel cell passenger car is characterized by comprising the following steps:
based on the integrated operation value of the total current of the fuel cell system after entering each state and the latest 30 seconds integrated operation value C/u of the total current of the fuel cell system after entering each state 30s SOC value of battery, charge power P affordable in current state of battery c The four control parameter values are formulated to generate a fuel cell system state switching strategy;
collecting various data of a vehicle in real time, calculating an integral operation value of the total current of the battery after the fuel cell system enters each state according to the various data of the vehicle, and calculating an integral operation value C/u of the total current of the battery for 30 seconds after the fuel cell system enters each state 30s SOC value of battery, charge power P affordable in current state of battery c Judging whether the state switching condition is met according to the calculation result;
when the calculation result meets any state switching condition, controlling the fuel cell system to perform corresponding state switching;
the state switching conditions are as follows:
state switching condition 1 expression:
(C_ all <-0.05C r ) And (C/u) 30s <0) And (SOC)>85%) and (P 1 ≤P c )；
State switching condition 2 expression:
(C_ all >0.05C r ) And (C/u) 30s >0) And (SOC)<80%) and (P 2 ≤P c )；
State switching condition 3 expression:
(C_ all <-0.4C r ) And (C/u) 30s <0) And (SOC)>80%) and (P 2 ≤P c )；
State switching condition 4 expression:
(C_ all >0.05C r ) And (C/u) 30s >0) And (SOC)<75%) and (P 3 ≤P c )；
State switching condition 5 expression:
(C_ all <-0.05C r ) And (C/u) 30s <0) And (SOC)>40%) and (P 3 ≤P c )；
State switching condition 6 expression:
(C_ all >0.4C r ) And (C/u) 30s >0) And (SOC)<35%) and (P 4 ≤P c )；
State switching condition 7 expression:
(C_ all <-0.05C r ) And (C/u) 30s <0) And (SOC)>35%) and (P 4 ≤P c )；
State switching condition 8 expression:
(C_ all >0.05C r ) And (C/u) 30s >0) And (SOC)<30%) and (P 5 ≤P c )；
The fuel cell system state switching strategy is as follows;
setting the fuel cell system to have an operating power P 1 、P 2 、P 3 、P 4 、P 5 Totally 5 working states, wherein P 5 >P 4 >P 3 >P 2 >P 1， The corresponding working efficiency is eta 1 、η 2 、η 3 、η 4 、η 5 ，η 3 >η 2 >η 1 、η 3 >η 4 >η 5 The working efficiency of the fuel cell system is relatively high in the middle section, and the working efficiency of high power and low power is relatively low;
default into P when the fuel cell system is powered on 3 A power operating state;
when the four control parameter values satisfy the state switching condition 3, the fuel cell system is operated from P 3 Switching power operation state to P 2 A power operating state;
when the four control parameter values satisfy the state switching condition 1, the fuel cell system is operated from P 2 Switching power operation state to P 1 A power operating state;
when the four control parameter values satisfy the state switching condition 2, the fuel cell system is operated from P 1 Switching power operation state to P 2 A power operating state;
when the four control parameter values satisfy the state switching condition 4, the fuel cell system is operated from P 2 Switching power operation state to P 3 A power operating state;
when the four control parameter values satisfy the state switching condition 6, the fuel cell system is operated from P 3 Switching power operation state to P 4 A power operating state;
when the four control parameter values satisfy the state switching condition 8, the fuel cell system is operated from P 4 Switching power operation state to P 5 A power operating state;
when the four control parameter values satisfy the state switching condition 7, the fuel cell system is operated from P 5 Switching power operation state to P 4 A power operating state;
when the four control parameter values satisfy the state switching condition 5, the fuel cell system is operated from P 4 Switching power operation state to P 3 A power operating state;
wherein C/u all Representing the integral operation value of the total current of the battery, C r Is the rated capacity of the battery.
2. The method for controlling the operating power of a fuel cell system of a fuel cell passenger car according to claim 1, wherein the method for formulating the state switching strategy of the fuel cell system comprises the steps of:
setting a plurality of operating states of the fuel cell system;
based on the integrated operation value of the total current of the fuel cell system after entering each state and the latest 30 seconds integrated operation value C/u of the total current of the fuel cell system after entering each state 30s SOC value of battery, charge power P affordable in current state of battery c Setting a plurality of state switching conditions;
each state switching condition is set to correspond to an operation state switching action of the fuel cell system.
3. The method for controlling the operating power of a fuel cell system of a fuel cell passenger car according to claim 1, wherein a fuel cell system state switching strategy is generated in a matlab system and is imported into a vehicle controller.
4. The method for controlling the operating power of a fuel cell system of a fuel cell passenger car according to claim 1, wherein the start-up condition of the fuel cell system is SOC <50%, and the shutdown condition is: SOC >90%.
5. The control system of the fuel cell system working power of the fuel cell passenger car is characterized by comprising the following functional modules:
the strategy formulation module is used for integrating the operation value of the total current of the battery based on the state of the fuel cell system, and integrating the operation value C/u of the total current of the battery for 30 seconds after the fuel cell system enters each state 30s SOC value of battery, charge power affordable in current state of batteryP c The four control parameter values are formulated to generate a fuel cell system state switching strategy;
the calculation and judgment module is used for collecting various data of the vehicle in real time, calculating an integral operation value of the total current of the battery after the fuel cell system enters each state according to the various data of the vehicle, and calculating an integral operation value C/u of the total current of the battery for 30 seconds after the fuel cell system enters each state 30s SOC value of battery, charge power P affordable in current state of battery c Judging whether the state switching condition is met according to the calculation result;
the state switching module is used for controlling the fuel cell system to perform corresponding state switching when the calculation result meets any state switching condition;
the state switching conditions are as follows:
state switching condition 1 expression:
(C_ all <-0.05C r ) And (C/u) 30s <0) And (SOC)>85%) and (P 1 ≤P c )；
State switching condition 2 expression:
(C_ all >0.05C r ) And (C/u) 30s >0) And (SOC)<80%) and (P 2 ≤P c )；
State switching condition 3 expression:
(C_ all <-0.4C r ) And (C/u) 30s <0) And (SOC)>80%) and (P 2 ≤P c )；
State switching condition 4 expression:
(C_ all >0.05C r ) And (C/u) 30s >0) And (SOC)<75%) and (P 3 ≤P c )；
State switching condition 5 expression:
(C_ all <-0.05C r ) And (C/u) 30s <0) And (SOC)>40%) and (P 3 ≤P c )；
State switching condition 6 expression:
(C_ all >0.4C r ) And (C/u) 30s >0) And (SOC)<35%) and (P 4 ≤P c )；
State switching condition 7 expression:
(C_ all <-0.05C r ) And (C/u) 30s <0) And (SOC)>35%) and (P 4 ≤P c )；
State switching condition 8 expression:
(C_ all >0.05C r ) And (C/u) 30s >0) And (SOC)<30%) and (P 5 ≤P c )；
The fuel cell system state switching strategy is as follows;
setting the fuel cell system to have an operating power P 1 、P 2 、P 3 、P 4 、P 5 Totally 5 working states, wherein P 5 >P 4 >P 3 >P 2 >P 1， The corresponding working efficiency is eta 1 、η 2 、η 3 、η 4 、η 5 ，η 3 >η 2 >η 1 、η 3 >η 4 >η 5 The working efficiency of the fuel cell system is relatively high in the middle section, and the working efficiency of high power and low power is relatively low;
default into P when the fuel cell system is powered on 3 A power operating state;
when the four control parameter values satisfy the state switching condition 3, the fuel cell system is operated from P 3 Switching power operation state to P 2 A power operating state;
when the four control parameter values satisfy the state switching condition 1, the fuel cell system is operated from P 2 Switching power operation state to P 1 A power operating state;
when the four control parameter values satisfy the state switching condition 2, the fuel cell system is operated from P 1 Switching power operation state to P 2 A power operating state;
when the four control parameter values satisfy the state switching condition 4, the fuel cell system is operated from P 2 Switching power operation state to P 3 A power operating state;
when the four control parameter values satisfy the state switching condition 6, the fuel cell system is operated from P 3 Switching power operation state to P 4 A power operating state;
when the four control parameter values satisfy the state switching condition 8, the fuel cell system is operated from P 4 Switching power operation state to P 5 A power operating state;
when the four control parameter values satisfy the state switching condition 7, the fuel cell system is operated from P 5 Switching power operation state to P 4 A power operating state;
when the four control parameter values satisfy the state switching condition 5, the fuel cell system is operated from P 4 Switching power operation state to P 3 A power operating state;
wherein C/u all Representing the integral operation value of the total current of the battery, C r Is the rated capacity of the battery.
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