CN112297953A - Control method and system for vehicle fuel cell - Google Patents
Control method and system for vehicle fuel cell Download PDFInfo
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- CN112297953A CN112297953A CN202011038870.XA CN202011038870A CN112297953A CN 112297953 A CN112297953 A CN 112297953A CN 202011038870 A CN202011038870 A CN 202011038870A CN 112297953 A CN112297953 A CN 112297953A
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- fuel cell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
- B60L58/31—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for starting of 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
- B60L58/30—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
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
-
- 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
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
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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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a control method and a control system of a vehicle fuel cell, and particularly relates to the field of vehicle battery control, wherein a vehicle control unit controls the starting and the standby of the fuel cell through the judgment of a control signal to supply power for a power battery, and simultaneously limits the constant power output of the fuel cell, thereby ensuring the stable parameters of the fuel cell. The fuel cell enters a standby mode through the starting signal, then enters a starting mode through the power demand signal, and controls the standby and the shutdown of the fuel cell under the control of various shutdown signals. Through the standby mode and the setting of various shutdown controls, the fuel cell can supply power to the power battery in time when needed, and can respond to a startup signal in time when shutdown or standby.
Description
Technical Field
The invention relates to the field of vehicle battery control, in particular to a control method and a control system of a vehicle fuel battery.
Background
The main circuit of the fuel cell vehicle consists of a power battery pack, a fuel cell system, a driving motor, load equipment and the like. When the electric car is operated, the traction motor is powered by the power battery and the fuel cell system together, wherein the fuel cell supplies power to the traction motor by charging the power battery. The fuel cell system only allows output, and the power cell has bidirectional functions (power supply and energy recovery).
However, the existing vehicle fuel cell is usually started up along with the start of the vehicle and is shut down along with the shut-down of the vehicle, which causes frequent start and stop of the fuel cell, easily causes damage and aging of the fuel cell, and reduces the service life of the fuel cell. Meanwhile, sudden change of the output power can also lead to reduction of the service life of the fuel cell, and aging of the internal structure is aggravated.
Disclosure of Invention
In order to solve the above problems, ensure the reliability of the fuel cell operation, avoid the frequent start-stop of the fuel cell, and the uncontrolled occurrence of parameters such as power voltage during the operation, the invention provides a control method of the vehicle fuel cell, the vehicle controller controls the start and standby of the fuel cell by the judgment of the control signal to supply power to the power cell, wherein, the judgment of the fuel cell start process comprises:
a1: judging whether a high-voltage signal is received or not in a shutdown mode of the fuel cell, and if so, entering the next step;
a2: judging whether a starting signal is received or not, and if so, entering the next step;
a3: judging whether a warming signal is received, if so, controlling the fuel cell to enter a warming mode and entering the next step, otherwise, sending a standby signal and entering step A5;
a4: judging whether a temperature rise confirmation signal is received or not, if so, sending a standby signal and entering the next step;
a5: receiving a standby signal and controlling the fuel cell to enter a standby mode;
a6: and judging whether a power demand signal is received or not, and if so, controlling the fuel cell to enter a starting mode.
Further, the fuel cell, the judgment of the entering into the standby process by the starting includes:
b1: judging whether an emergency stop signal is received, if so, sending a shutdown signal and entering a step B41, otherwise, entering the next step;
b2: judging whether a shutdown signal is received or not, if so, sending the shutdown signal and entering a step B42, otherwise, entering the next step;
b3: judging whether a power demand signal is received, if not, sending a standby signal and entering the step B43, otherwise, returning to the step B1;
b41: receiving a shutdown signal and controlling the shutdown of the fuel cell;
b42: receiving a shutdown signal and controlling the shutdown of the fuel cell;
b43: and receiving a standby signal, and controlling the fuel cell to enter a standby state after a first preset time.
Further, in the processing procedure from step B41 to step B43, the method further comprises the steps of:
b44: and judging whether a purging signal is received or not, and if so, controlling the fuel cell to purge within a second preset time.
Further, the step B42 is followed by a step,
b421: and judging whether a starting signal is received or not after the third preset time, and if so, controlling the fuel cell to enter a standby mode.
Further, after the step B421 and the step B43, the method further includes determining whether the vehicle control unit receives a power demand signal, and if so, controlling the fuel cell to interrupt purging and enter a start mode.
Further, the power demand signal is a signal for controlling the fuel cell to maintain a constant power output; the temperature rise confirmation signal is a signal that the fuel cell reaches a preset temperature; the power demand signal is a signal that the power battery reaches a preset power.
The invention also discloses a control system of the vehicle fuel cell, which is characterized in that the vehicle control unit controls the start and standby of the fuel cell through the control signal to supply power for the power cell, the fuel cell also comprises a warming unit, and in the starting process:
the vehicle control unit is used for sending a control signal to the warming unit after receiving the warming signal and sending a standby signal to the fuel cell after receiving the starting signal and the temperature rise confirmation signal;
the warming unit is used for controlling the fuel cell to enter a warming mode after receiving the control signal and sending a temperature rise confirmation signal when the temperature of the fuel cell reaches a preset temperature;
the vehicle control unit is also used for sending a power demand signal to the fuel cell when the power of the power cell reaches a preset power;
and the fuel cell is used for entering a standby mode after receiving the standby signal and entering a starting mode after receiving the power demand signal.
Further, still include and wait to control the module, in the standby process:
the standby control module is used for controlling the fuel cell to enter a shutdown mode when receiving the emergency stop signal and the shutdown signal;
and the standby control module is also used for controlling the fuel cell to enter a standby mode after receiving the standby signal for a first preset time.
Further, if the standby control module receives the startup signal after receiving the third preset time of the shutdown signal, the standby control module controls the fuel cell to enter the standby mode.
Further, the fuel cell further comprises a purging unit, which is used for purging the fuel cell when the standby control module controls the fuel cell to enter the shutdown mode or the standby mode.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) according to the control method and the control system of the vehicle fuel cell, the fuel cell enters the standby mode through the starting signal, then enters the starting mode through the power demand signal, and the fuel cell can supply power to the power cell in time when needed through the setting of the standby mode;
(2) by setting the power demand signal, the fuel cell can supply power to the power cell again when the power cell meets a certain power demand of movement, and the fuel cell is limited to output with constant power, so that the parameter stability of the fuel cell is ensured;
(3) frequent starting and stopping of the fuel cell and constant voltage output are avoided, and the service life of the fuel cell is prolonged.
Drawings
Fig. 1 is a diagram of a method start-up process step of a control method of a fuel cell for a vehicle;
fig. 2 is a diagram of method standby process steps of a control method of a fuel cell for a vehicle;
fig. 3 is a block diagram of a control system of a fuel cell for a vehicle.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
In order to solve the above problems, ensure the reliability of the fuel cell operation, avoid the frequent start/stop of the fuel cell, and the uncontrolled occurrence of parameters such as power voltage during the operation, the present invention provides a control method of the fuel cell for the vehicle, as shown in fig. 1, the vehicle controller controls the start and standby of the fuel cell by the judgment of the control signal to supply power to the power cell, wherein the judgment of the start process of the fuel cell comprises:
a1: judging whether a high-voltage signal is received or not in a shutdown mode of the fuel cell, and if so, entering the next step;
a2: judging whether a starting signal is received or not, and if so, entering the next step;
a3: judging whether a warming signal is received, if so, controlling the fuel cell to enter a warming mode and entering the next step, otherwise, sending a standby signal and entering step A5;
a4: judging whether a temperature rise confirmation signal is received or not, if so, sending a standby signal and entering the next step; (it should be noted that the maximum warm-up time in this embodiment is 20min, and if the maximum warm-up time exceeds this time, a failure signal is sent to the vehicle control unit)
A5: receiving a standby signal and controlling the fuel cell to enter a standby mode;
a6: and judging whether a power demand signal is received or not, and if so, controlling the fuel cell to enter a starting mode.
Wherein the power demand signal is a signal for controlling the fuel cell to maintain a constant power output (the power is maintained by controlling the flow and pressure of the input fuel in the fuel cell); the temperature rise confirmation signal is a signal indicating that the fuel cell reaches a preset temperature after being warmed up; the power demand signal is a signal that the power battery reaches a preset power.
Through the judgment of each control signal after the high-voltage conduction of the fuel cell, the fuel cell can send a standby signal to the fuel cell after receiving a starting signal under the condition of meeting the requirement of working temperature, so that the fuel cell enters a standby mode, and a power demand signal is responded at any time. And through the judgment of the temperature rise confirmation signal, the fuel cell can enter a standby mode after reaching the preset temperature, so that the fuel cell is prevented from being damaged under the low-temperature working state.
Further, the judgment of the fuel cell entering the standby process by the start-up, as shown in fig. 2, includes:
b1: judging whether an emergency stop signal is received, if so, sending a shutdown signal and entering a step B41, otherwise, entering the next step;
b2: judging whether a shutdown signal is received or not, if so, sending the shutdown signal and entering a step B42, otherwise, entering the next step;
b3: judging whether a power demand signal is received, if not, sending a standby signal and entering the step B43, otherwise, returning to the step B1;
b41: receiving a shutdown signal and controlling the shutdown of the fuel cell;
(when the fuel cell has a shutdown failure, the whole vehicle control system sends an emergency stop signal, and the fuel cell is shut down)
B42: receiving a shutdown signal and controlling the shutdown of the fuel cell;
(vehicle control unit no signal reaction, fuel cell shut down and send status signal to vehicle control unit)
B43: and receiving a standby signal, and controlling the fuel cell to enter a standby state after a first preset time.
It should be noted that, when the fuel cell is shut down or in standby, the fuel cell does not enter the shutdown mode or the standby mode at a time, and in order to damage the fuel cell by sudden change of power, the fuel cell ensures that the output power is gradually decreased by gradually decreasing the input of fuel during the mode switching process. However, if the sudden stop command is a forced sudden stop (the forced sudden stop is a condition in which fuel leakage occurs in the fuel cell), the fuel cell immediately stops outputting at that time.
Accordingly, the priority of the "close command" is in turn: emergency fuel cell stops, general fuel cell stops and normal fuel cell shut down.
In the processing procedure from step B41 to step B43, the method further comprises the following steps:
b44: and judging whether a purging signal is received or not, and if so, controlling the fuel cell to purge within a second preset time.
After the step B421 and the step B43, the method further includes determining whether the vehicle controller receives a power demand signal, and if so, controlling the fuel cell to interrupt purging and enter a start mode (discharging and blowing out the residual fuel in the fuel cell to avoid the occurrence of conditions such as explosion caused by the residual fuel).
A step is also included after step B42,
b421: and judging whether the starting signal is received or not after the third preset time, if so, controlling the fuel cell to enter a standby mode (the situation that the vehicle controller returns to the signal reaction and starts up again at the moment).
Example two
In order to better understand the invention systematically, this embodiment describes the structural relationship of the components of the invention in a modular form, as shown in fig. 3, a control system of a vehicle fuel cell, a vehicle controller controls the start and standby of the fuel cell through a control signal to supply power to a power cell, the fuel cell further includes a warm-up unit, during the start process:
the vehicle control unit is used for sending a control signal to the warming unit after receiving the warming signal and sending a standby signal to the fuel cell after receiving the starting signal and the temperature rise confirmation signal;
the warming unit is used for controlling the fuel cell to enter a warming mode after receiving the control signal and sending a temperature rise confirmation signal when the temperature of the fuel cell reaches a preset temperature;
the vehicle control unit is also used for sending a power demand signal to the fuel cell when the power of the power cell reaches a preset power;
and the fuel cell is used for entering a standby mode after receiving the standby signal and entering a starting mode after receiving the power demand signal.
Wherein, still including waiting to control the module, the standby in-process:
the standby control module is used for controlling the fuel cell to enter a shutdown mode when receiving the emergency stop signal and the shutdown signal;
and the standby control module is also used for controlling the fuel cell to enter a standby mode after receiving the standby signal for a first preset time.
And if the standby control module receives the starting-up signal after receiving the third preset time of the shutdown signal, controlling the fuel cell to enter a standby mode.
The fuel cell further comprises a purging unit used for purging the fuel cell when the standby control module controls the fuel cell to enter a shutdown mode or a standby mode.
In summary, according to the control method and system for the vehicle fuel cell of the present invention, the fuel cell enters the standby mode through the power-on signal, and then enters the start mode through the power demand signal, so that the fuel cell can timely supply power to the power cell when needed through the setting of the standby mode.
Meanwhile, by setting the power demand signal, the fuel cell can supply power to the power cell again when the power cell meets certain power requirements, the fuel cell is limited to output with constant power, the stable parameters of the fuel cell can be ensured, frequent start and stop of the fuel cell and constant output of voltage are avoided, and the service life of the fuel cell is prolonged.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A control method of a vehicle fuel cell is characterized in that a vehicle control unit controls the start and standby of the fuel cell through the judgment of a control signal to supply power to a power battery, wherein the judgment of the start process of the fuel cell comprises the following steps:
a1: judging whether a high-voltage signal is received or not in a shutdown mode of the fuel cell, and if so, entering the next step;
a2: judging whether a starting signal is received or not, and if so, entering the next step;
a3: judging whether a warming signal is received, if so, controlling the fuel cell to enter a warming mode and entering the next step, otherwise, sending a standby signal and entering step A5;
a4: judging whether a temperature rise confirmation signal is received or not, if so, sending a standby signal and entering the next step;
a5: receiving a standby signal and controlling the fuel cell to enter a standby mode;
a6: and judging whether a power demand signal is received or not, and if so, controlling the fuel cell to enter a starting mode.
2. The control method of a fuel cell for a vehicle according to claim 1, wherein the judgment that the fuel cell enters the standby process by the start-up includes:
b1: judging whether an emergency stop signal is received, if so, sending a shutdown signal and entering a step B41, otherwise, entering the next step;
b2: judging whether a shutdown signal is received or not, if so, sending the shutdown signal and entering a step B42, otherwise, entering the next step;
b3: judging whether a power demand signal is received, if not, sending a standby signal and entering the step B43, otherwise, returning to the step B1;
b41: receiving a shutdown signal, and controlling the fuel cell to enter a shutdown mode;
b42: receiving a shutdown signal, and controlling the fuel cell to enter a shutdown mode;
b43: and receiving a standby signal, and controlling the fuel cell to enter a standby mode after a first preset time.
3. The method of claim 2, wherein the processing of steps B41 through B43 further comprises the steps of:
b44: and judging whether a purging signal is received or not, and if so, controlling the fuel cell to purge within a second preset time.
4. The control method of a fuel cell for a vehicle according to claim 3, further comprising a step after said step B42,
b421: and judging whether a starting signal is received or not after the third preset time, and if so, controlling the fuel cell to enter a standby mode.
5. The method as claimed in claim 4, wherein after the steps B421 and B43, the method further includes determining whether the vehicle controller receives a power demand signal, and if so, controlling the fuel cell to interrupt purging and enter the start mode.
6. The control method of a fuel cell for a vehicle according to claim 1, wherein the power demand signal is a signal for controlling the fuel cell to maintain a constant power output; the temperature rise confirmation signal is a signal that the fuel cell reaches a preset temperature; the power demand signal is a signal that the power battery reaches a preset power.
7. The control system of the vehicle fuel cell is characterized in that a vehicle control unit controls the start and the standby of the fuel cell through a control signal to supply power to a power cell, the fuel cell further comprises a warming-up unit, and in the starting process:
the vehicle control unit is used for sending a control signal to the warming unit after receiving the warming signal and sending a standby signal to the fuel cell after receiving the starting signal and the temperature rise confirmation signal;
the warming unit is used for controlling the fuel cell to enter a warming mode after receiving the control signal and sending a temperature rise confirmation signal when the temperature of the fuel cell reaches a preset temperature;
the vehicle control unit is also used for sending a power demand signal to the fuel cell when the power of the power cell reaches a preset power;
and the fuel cell is used for entering a standby mode after receiving the standby signal and entering a starting mode after receiving the power demand signal.
8. The control system of a fuel cell for a vehicle according to claim 7, further comprising a standby control module, wherein during the standby:
the standby control module is used for controlling the fuel cell to enter a shutdown mode when receiving the emergency stop signal and the shutdown signal;
and the standby control module is also used for controlling the fuel cell to enter a standby mode after receiving the standby signal for a first preset time.
9. The control system of claim 8, wherein the standby control module controls the fuel cell to enter the standby mode if the standby control module receives the power-on signal after receiving the power-off signal for a third preset time.
10. The control system of claim 8, further comprising a purge unit for purging the fuel cell when the standby control module controls the fuel cell to enter the shutdown mode or the standby mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011038870.XA CN112297953A (en) | 2020-09-28 | 2020-09-28 | Control method and system for vehicle fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011038870.XA CN112297953A (en) | 2020-09-28 | 2020-09-28 | Control method and system for vehicle fuel cell |
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| CN112297953A true CN112297953A (en) | 2021-02-02 |
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| CN202011038870.XA Pending CN112297953A (en) | 2020-09-28 | 2020-09-28 | Control method and system for vehicle fuel cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113161584A (en) * | 2021-04-21 | 2021-07-23 | 中通客车股份有限公司 | Starting control method and system for whole vehicle fuel cell system and passenger car |
| CN114006005A (en) * | 2021-09-17 | 2022-02-01 | 东风汽车集团股份有限公司 | Control method and device for fuel cell vehicle |
| CN115991124A (en) * | 2021-10-20 | 2023-04-21 | 宇通客车股份有限公司 | Fuel cell vehicle and low-temperature starting control method and system thereof |
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| CN113161584A (en) * | 2021-04-21 | 2021-07-23 | 中通客车股份有限公司 | Starting control method and system for whole vehicle fuel cell system and passenger car |
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| CN115991124A (en) * | 2021-10-20 | 2023-04-21 | 宇通客车股份有限公司 | Fuel cell vehicle and low-temperature starting control method and system thereof |
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Application publication date: 20210202 |