CN110549867B - Dual-mode automatic switching control method of hydrogen fuel cell vehicle - Google Patents
Dual-mode automatic switching control method of hydrogen fuel cell vehicle Download PDFInfo
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- CN110549867B CN110549867B CN201910708216.6A CN201910708216A CN110549867B CN 110549867 B CN110549867 B CN 110549867B CN 201910708216 A CN201910708216 A CN 201910708216A CN 110549867 B CN110549867 B CN 110549867B
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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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
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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
- B60L58/10—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]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or 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
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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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 invention provides a double-mode automatic switching control method of a hydrogen fuel cell vehicle, wherein the hydrogen fuel cell vehicle comprises a vehicle control unit VCU, a fuel cell controller FCU, a power cell manager BMS, a fuel cell, a power cell, a DCDC and a low-voltage battery, the vehicle control unit VCU is connected with the fuel cell controller FCU and the power cell manager BMS through a CAN network, the fuel cell and the power cell are respectively and electrically connected with a driving motor of the hydrogen fuel cell vehicle, and the fuel cell controller FCU controls the opening and closing of the fuel cell according to the SOC of the power cell, so that the hydrogen fuel cell vehicle is automatically switched between a pure electric mode and a fuel-electric hybrid mode. The invention has the beneficial effects that: the invention provides a control solution of dual-mode automatic switching, which enables a hydrogen fuel cell vehicle to be automatically switched from a fuel-electric hybrid mode to a pure-electric mode when idle power output exists, so as to ensure the safety of the system and the continuity of the power supply of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cell vehicle control, in particular to a dual-mode automatic switching control method of a hydrogen fuel cell vehicle.
Background
Because the hydrogen fuel cell system has idle power output, when the consumed power of the vehicle is smaller than the idle power output of the fuel cell system, the generated power cannot be consumed, and the redundant power can cause serious damage to the fuel cell system and a finished vehicle high-voltage loop.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a dual-mode automatic switching control method for a hydrogen fuel cell vehicle.
An embodiment of the present invention provides a dual-mode automatic switching control method for a hydrogen fuel cell vehicle, where the hydrogen fuel cell vehicle includes a vehicle control unit VCU, a fuel cell controller FCU, a power cell manager BMS, a fuel cell, a power cell, a DCDC, and a low-voltage battery, the vehicle control unit VCU connects the fuel cell controller FCU and the power cell manager BMS through a CAN network, the fuel cell controller FCU connects the fuel cell, the power cell manager BMS connects the power cell, the fuel cell and the power cell are respectively electrically connected to a driving motor of the hydrogen fuel cell vehicle, the fuel cell is electrically connected to the power cell, the power cell is electrically connected to the low-voltage battery through the DCDC, the fuel cell is used for driving the driving motor, and the power cell is used for driving the driving motor and charging the low-voltage battery, the dual-mode automatic switching control method comprises the following steps:
s1, low-voltage power-up of the low-voltage storage battery, and high-voltage power-up of the power battery and the fuel battery;
s2, if the VCU receives the power-off request, turning to S7, otherwise, turning to S3;
s3, monitoring the residual electric quantity SOC of the power battery by the BMS, and turning to S4 if the residual electric quantity SOC of the power battery is less than X%; if the SOC of the power battery is not less than X%, the power battery supplies power to the driving motor, and the BMS continues to monitor the SOC of the power battery, wherein the value range of X is 0-100;
s4, the fuel cell controller FCU starts the fuel cell, the fuel cell supplies power to the power cell, the power cell supplies power to the driving motor, and the fuel cell supplies power to the driving motor at the target power P set by the fuel cell controller FCU; in the process of supplying power to the fuel cell, if the vehicle control unit VCU receives a power-off request or the power battery manager BMS monitors that the SOC of the power battery is greater than Y%, then the operation goes to S5; otherwise, the fuel cell continuously supplies power to the power battery and the driving motor until the power battery manager BMS monitors that the SOC of the residual electric quantity of the power battery is greater than Y%, and then the power battery manager BMS switches to S5, wherein the value range of Y is 0-100;
s5, the fuel cell controller FCU turns off the fuel cell and sets the target power P of the fuel cell to zero, the fuel cell stops supplying power to the power cell and the driving motor, and the driving motor is supplied with power by the power cell;
s6, if the VCU receives the power-on request, turning to S3, otherwise, turning to S7;
and S7, the power battery and the fuel battery are charged at high voltage and the low-voltage battery is charged at low voltage.
Further, in step S3, X% + 3SOC consumption + SOCminWherein SOC consumption represents the SOC value of the fuel cell from power-on to normal output power, SOCminAnd representing the minimum SOC value allowed by the power battery.
Further, in step S4, Y% ═ SOCmaxIncrease in SOC, wherein SOCmaxAnd representing the maximum SOC value of the power battery, wherein the SOC increase represents the SOC increase value of the power battery from the start of shutdown to the completion of shutdown of the fuel battery.
Further, the low voltage battery is electrically connected to the fuel cell controller FCU and the power battery manager BMS, respectively, and the low voltage battery is used to provide a direct current low voltage power to the fuel cell controller FCU and the power battery manager BMS.
Further, the low-voltage storage battery is a 12V or 24V storage battery.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the dual-mode automatic switching control method of the hydrogen fuel cell vehicle, disclosed by the invention, through a control solution of dual-mode automatic switching, the hydrogen fuel cell vehicle is automatically switched from a fuel-electric hybrid mode to a pure-electric mode when idle speed power output exists, so that the safety of a system and the continuity of the power supply of the whole vehicle are ensured.
Drawings
Fig. 1 is a schematic view showing the connection of components of a hydrogen fuel cell vehicle according to the present invention.
Fig. 2 is a flow chart illustrating steps of a dual-mode automatic switching control method for a hydrogen fuel cell vehicle according to the present invention.
Fig. 3 is a flowchart of a dual-mode automatic switching control method of a hydrogen fuel cell vehicle according to the present invention.
In the figure: 1-vehicle controller VCU, 2-fuel cell controller FCU, 3-power battery manager BMS, 4-fuel cell, 5-power battery, 6-DCDC, 7-low voltage battery, 8-driving motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a dual-mode automatic switching control method for a hydrogen-fueled vehicle, the hydrogen-fueled vehicle including a vehicle controller VCU1, a fuel cell controller FCU2, a power cell manager BMS3, a fuel cell 4, a power cell 5, a DCDC6, and a low-voltage battery 7, the vehicle controller VCU1 being connected to the fuel cell controller FCU2 and the power cell manager BMS3 via a CAN network, the fuel cell controller FCU2 being connected to the fuel cell 4, the fuel cell 4 being electrically connected to the power cell 5 at a high voltage, the power cell manager BMS3 being connected to the power cell 5, the fuel cell 4 and the power cell 5 being electrically connected to a driving motor 8 of the hydrogen-fueled vehicle at a high voltage, respectively, the low-voltage battery 7 being electrically connected to the fuel cell controller FCU2 and the power cell manager BMS3 at a low voltage, the power battery 5 is electrically connected with the low-voltage storage battery 7 through the DCDC6, the fuel cell 4 is used for driving the driving motor 8, the power battery 5 is used for driving the driving motor 8 and charging the low-voltage storage battery 7, the low-voltage storage battery 7 is a 12V or 24V storage battery and is used for providing direct-current low-voltage electricity for low-voltage electricity-using units such as the fuel cell controller FCU2 and the power battery manager BMS3, and the low-voltage electricity supply of the hydrogen fuel cell vehicle is ensured to be stable and sufficient.
Referring to fig. 2 and 3, the dual-mode automatic switching control method includes the following steps:
s1, the low-voltage storage battery 7 is electrified at low voltage, and the power battery 5 and the fuel battery 4 are electrified at high voltage, so that the high-voltage power consumption requirement in the starting process of the fuel battery system is guaranteed, and the whole vehicle is ready;
s2, if the VCU1 of the vehicle controller receives a power-off request, turning to S7, otherwise, turning to S3;
s3, monitoring the residual electric quantity SOC of the power battery 5 by the BMS3, and turning to S4 if the residual electric quantity SOC of the power battery 5 is less than X%; if the residual electric quantity SOC of the power battery 5 is not less than X%, the power battery 5 supplies power to the driving motor 8, the power battery manager BMS3 continuously monitors the residual electric quantity SOC of the power battery 5, and at the moment, the hydrogen fuel cell vehicle drives to run in a pure electric mode in which the power battery 5 is solely supplied with power, wherein:
X％＝3SOCconsumption of+SOCmin (1)
SOC in the above equation (1)Consumption ofRepresenting the value of the SOC consumed by the fuel cell 4 from start-up to normal output power, SOC in the formulaminThe minimum SOC value allowed by the power battery 5 is represented, and the value range of X is 0-100;
s4, the fuel cell controller FCU2 starts the fuel cell 4, the fuel cell 4 supplies power to the power cell 5, the power cell 5 supplies power to the driving motor 8, and the fuel cell 4 supplies power to the driving motor 8 according to the target power P set by the fuel cell controller FCU2, at this time, the hydrogen fuel cell vehicle is automatically switched from the pure electric mode to the fuel-electric hybrid mode; in the process of supplying power to the fuel cell 4, if the vehicle control unit VCU1 receives a power-off request or the power battery manager BMS3 monitors that the SOC of the remaining power of the power cell 5 is greater than Y%, then the operation goes to S5; otherwise, the fuel cell 4 continues to supply power to the power battery 5 and the driving motor 8 until the power battery manager BMS3 detects that the remaining capacity SOC of the power battery 5 is greater than Y%, and then the process goes to S5, wherein:
Y％＝SOCmax-SOCincrease in growth (2)
SOC in the above equation (2)maxRepresents the maximum value of the residual charge SOC of the power battery 5, SOC in the embodimentmaxLess than 100%, SOC in the formulaIncrease in growthThe SOC increasing value of the power battery 5 from the start of shutdown to the completion of shutdown of the fuel battery 4 is represented, and the value range of Y is 0-100;
s5, the fuel cell controller FCU2 turns off the fuel cell 4 and sets the target power P of the fuel cell 4 to zero, the fuel cell 4 stops supplying power to the power cell 5 and the driving motor 8, the driving motor 8 is supplied with power by the power cell 5, and the hydrogen fuel cell vehicle is automatically switched to a pure electric mode from a fuel-electric hybrid mode;
s6, if the VCU1 of the vehicle controller receives a power-on request, turning to S3, otherwise, turning to S7;
and S7, the power battery 5 and the fuel battery 4 are charged at high voltage, and the low-voltage battery 7 is charged at low voltage.
According to the invention, by establishing the working condition of automatically opening and closing the fuel cell 4, the hydrogen fuel cell vehicle can be automatically switched between the pure electric mode and the fuel-electric hybrid mode, so that the hydrogen fuel cell vehicle is automatically switched from the fuel-electric hybrid mode to the pure electric mode when idle power output exists, the idle power output problem of the fuel cell 4 is effectively solved, and the safety of the fuel cell system and the continuity of the power supply of the whole vehicle are further ensured.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A dual-mode automatic switching control method of a hydrogen fuel cell vehicle comprises a vehicle control unit VCU, a fuel cell controller FCU, a power cell manager BMS, a fuel cell, a power cell, a DCDC and a low-voltage battery, wherein the vehicle control unit VCU is connected with the fuel cell controller FCU and the power cell manager BMS through a CAN network, the fuel cell controller FCU is connected with the fuel cell, the power cell manager BMS is connected with the power cell, the fuel cell and the power cell are respectively and electrically connected with a driving motor of the hydrogen fuel cell vehicle, the fuel cell is electrically connected with the power cell, the power cell is electrically connected with the low-voltage battery through the DCDC, the fuel cell is used for driving the driving motor, the power cell is used for driving the driving motor and charging the low-voltage battery, the method is characterized by comprising the following steps:
s1, low-voltage power-up of the low-voltage storage battery, and high-voltage power-up of the power battery and the fuel battery;
s2, if the VCU receives the power-off request, turning to S7, otherwise, turning to S3;
s3, monitoring the residual electric quantity SOC of the power battery by the BMS, and turning to S4 if the residual electric quantity SOC of the power battery is less than X%; if the SOC of the power battery is not less than X%, the power battery supplies power to the driving motor, and the BMS continues to monitor the SOC of the power battery, wherein the value range of X is 0-100;
s4, the fuel cell controller FCU starts the fuel cell, the fuel cell supplies power to the power cell, the power cell supplies power to the driving motor, and the fuel cell supplies power to the driving motor at the target power P set by the fuel cell controller FCU; in the process of supplying power to the fuel cell, if the vehicle control unit VCU receives a power-off request or the power battery manager BMS monitors that the SOC of the power battery is greater than Y%, then the operation goes to S5; otherwise, the fuel cell continuously supplies power to the power battery and the driving motor until the power battery manager BMS monitors that the SOC of the residual electric quantity of the power battery is greater than Y%, and then the power battery manager BMS switches to S5, wherein the value range of Y is 0-100;
s5, the fuel cell controller FCU turns off the fuel cell and sets the target power P of the fuel cell to zero, the fuel cell stops supplying power to the power cell and the driving motor, and the driving motor is supplied with power by the power cell;
s6, if the VCU receives the power-on request, turning to S3, otherwise, turning to S7;
and S7, the power battery and the fuel battery are charged at high voltage and the low-voltage battery is charged at low voltage.
2. The dual-mode automatic switching control method of a hydrogen fuel cell vehicle as claimed in claim 1, characterized in that: in step S3, X% ═ 3SOCConsumption of+SOCminWherein, SOCConsumption ofRepresenting the value of the SOC, consumed by the fuel cell from start-up to normal output powerminAnd representing the minimum SOC value allowed by the power battery.
3. The dual-mode automatic switching control method of a hydrogen fuel cell vehicle as claimed in claim 1, characterized in that: in step S4, Y% ═ SOCmax-SOCIncrease in growthWherein, SOCmaxRepresenting the maximum SOC value, SOC, of the power batteryIncrease in growthAn SOC increase value indicating that the fuel cell has completed the power cell from a start of shutdown to a shutdown.
4. The dual-mode automatic switching control method of a hydrogen fuel cell vehicle as claimed in claim 1, characterized in that: the low-voltage battery is electrically connected with the fuel cell controller FCU and the power battery manager BMS respectively, and is used for providing direct-current low-voltage electricity for the fuel cell controller FCU and the power battery manager BMS.
5. The dual-mode automatic switching control method of a hydrogen fuel cell vehicle as set forth in claim 4, wherein: the low-voltage storage battery is a 12V or 24V storage battery.
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| CN111251910B (en) * | 2019-12-17 | 2022-04-29 | 武汉理工大学 | Power-on starting method of fuel cell automobile dual-source hybrid power system |
| CN111114532B (en) * | 2020-03-31 | 2020-08-21 | 潍柴动力股份有限公司 | Control method of fuel cell vehicle and vehicle control unit |
| CN111431167B (en) * | 2020-05-14 | 2021-12-07 | 洛阳智能农业装备研究院有限公司 | Power supply control system and method for hydrogen fuel cell and lithium battery of electric tractor |
| CN112172606A (en) * | 2020-09-27 | 2021-01-05 | 武汉格罗夫氢能汽车有限公司 | External power supply system of hydrogen energy automobile |
| CN113997831B (en) * | 2021-12-03 | 2024-02-27 | 博雷顿科技股份公司 | Power output control method for hydrogen-electricity hybrid electric vehicle fuel cell |
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