CN115498218A - Low-temperature start control method and device, electronic equipment and storage medium - Google Patents
Low-temperature start control method and device, electronic equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04302—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a low-temperature start control method and device, electronic equipment and a storage medium. Receiving a starting signal, acquiring the ambient temperature of a target vehicle, and starting a low-temperature starting mode when the ambient temperature is lower than a first preset temperature; the method comprises the following steps of obtaining a galvanic pile temperature in a low-temperature starting mode, and entering a long-time low-temperature starting mode when the galvanic pile temperature is lower than a second preset temperature and a temperature difference value between the galvanic pile temperature and the ambient temperature is lower than a third preset temperature; in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the backpressure valve to enable the temperature of the electric pile to reach a second preset voltage value; the temperature of the galvanic pile and the temperature rise rate of the galvanic pile are monitored so as to control the starting of the target vehicle based on the monitoring content, and the problem of incongruity of water yield and heat productivity of the low-temperature starting of the fuel cell is solved, so that the fuel cell can be started smoothly, and the efficiency of starting the fuel cell is improved.
Description
Technical Field
The present invention relates to the field of battery control technologies, and in particular, to a low-temperature start control method and apparatus, an electronic device, and a storage medium.
Background
A fuel cell is a chemical device that directly converts chemical energy of fuel into electric energy, and is also called an electrochemical generator. In the prior art for low-temperature starting of the fuel cell, one is loaded according to a preset current, and the other is loaded with a constant voltage, namely, the voltage output is kept constant, and the current changes along with the temperature change.
However, the method for low-temperature starting of the fuel cell loaded with the predetermined current may fail to achieve the predetermined current in the current loading process; the method for starting the fuel cell at low temperature by constant voltage loading has the problems that the current changes frequently, the current of the electric pile is too large under the condition of low temperature, and the water is too much.
Disclosure of Invention
The invention provides a low-temperature start control method, a low-temperature start control device, electronic equipment and a storage medium, so that a fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.
In a first aspect, the present invention provides a low-temperature start control method, including:
when a starting signal is received, acquiring the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold;
acquiring the current temperature of the galvanic pile in a low-temperature starting mode, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold;
in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the temperature of the electric pile to reach a second preset voltage value;
the stack temperature and the stack temperature rise rate are monitored to control the target vehicle launch based on the stack temperature and the stack temperature rise rate.
In a second aspect, the present invention provides a low-temperature start control apparatus, including:
the low-temperature starting module is used for acquiring the environment temperature of the environment to which the target vehicle belongs when receiving the starting signal and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold;
the long-time low-temperature starting module is used for acquiring the current temperature of the galvanic pile in the low-temperature starting mode, and entering the long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference value between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold;
the low-temperature starting adjustment module is used for determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile in a low-temperature starting mode, taking the adjustment current value as the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the backpressure valve so as to enable the temperature of the electric pile to reach a second preset voltage value;
and the vehicle starting control module is used for monitoring the temperature of the electric pile and the temperature rise rate of the electric pile so as to control the target vehicle to start based on the temperature of the electric pile and the temperature rise rate of the electric pile.
In a third aspect, the present invention provides an electronic device for low-temperature start control, including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the cold start control method of any of the embodiments of the present invention.
In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for causing a processor to implement the method for controlling low-temperature start according to any one of the embodiments of the present invention when the computer instructions are executed.
In a fifth aspect, the invention provides a computer program product comprising a computer program which, when executed by a processor, implements the cold start control method of any of the embodiments of the invention.
The invention discloses a low-temperature start control method and device, electronic equipment and a storage medium. When a starting signal is received, acquiring the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold; acquiring the current temperature of the galvanic pile in a low-temperature starting mode, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold; in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the temperature of the electric pile to reach a second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the target vehicle launch based on the stack temperature and the stack temperature rise rate. The technical scheme disclosed by the invention solves the problem of inconsistent water yield and heat productivity of the low-temperature start of the fuel cell, and three start modes are set: the fuel cell can be controlled to work under preset voltage and current at different temperatures by controlling reactant supply conditions, so that the heat productivity and the water yield are constant, and whether the starting mode is switched or not is determined by the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until the galvanic pile reaches the preset temperature and is started successfully, so that the fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a fuel cell control principle according to an embodiment of the present invention;
fig. 2 is a flowchart of a low-temperature start control method according to an embodiment of the present invention;
fig. 3 is a flowchart of a low-temperature start control method according to a second embodiment of the present invention;
fig. 4 is a flowchart of a low-temperature start control method according to a third embodiment of the present invention;
fig. 5 is a flowchart of a fuel cell low-temperature start control method according to a fourth embodiment of the present invention;
fig. 6 is a specific flowchart of a low-temperature start control method for a fuel cell according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a low-temperature start control device according to a fifth embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to a sixth embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first preset condition", "second preset condition", and the like in the description and the claims of the present invention and the drawings are used for distinguishing similar objects and are not necessarily used for describing a specific order or sequence. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Before the present technical solution is introduced, a schematic diagram of a fuel cell control principle will be described, referring to fig. 1. As shown in fig. 1, the fuel cell control system may include: air filter, air inlet flowmeter, ambient temperature sensor, air compressor machine, fuel cell stack, water pump, back pressure valve and DCDC converter. Air can get into the air compressor machine through air filter, through air inlet flow meter, ambient temperature sensor, and air compressor machine exit linkage fuel cell pile, fuel cell pile exit linkage back pressure valve. The water pump is connected with the fuel cell stack and used for balancing the temperature of the stack and dissipating heat; the output end of the fuel cell stack is connected with a DCDC converter, and the DCDC converter can load and control the fuel cell according to preset voltage or current.
Fig. 2 is a flowchart of a low-temperature start control method according to an embodiment of the present invention. The present embodiment is applicable to a case where the fuel cell is started at a low temperature. The method may be performed by a cold start control device in the vehicle, which may be implemented in hardware and/or software, which may generally be integrated in the vehicle. As shown in fig. 2, the method includes:
and S110, when the starting signal is received, acquiring the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold value.
In this embodiment, the start signal may be provided by a vehicle controller of the vehicle to inform the fuel cell that a power supply function for the vehicle needs to be performed. The target vehicle may be any vehicle, but must be a vehicle equipped with a fuel cell. The ambient temperature is the temperature of the current environment where the target vehicle is located, and can be obtained by a temperature sensor configured on the vehicle. The first predetermined temperature threshold is a predetermined temperature value, which may be, for example, -5 ℃. The low-temperature start mode is compared with the normal-temperature start mode, when the target vehicle is in an environment with a relatively low temperature, the chemical reaction of the fuel cell is slowed, and the charge-discharge efficiency is greatly reduced. The low-temperature starting mode can also comprise a quick low-temperature starting mode, a short-time low-temperature starting mode and a long-time low-temperature starting mode.
Specifically, when it is detected that the fuel cell receives a command for starting the fuel cell from a vehicle controller of the vehicle, a temperature sensor disposed on the target vehicle may collect a current ambient temperature, compare the current ambient temperature with a first preset temperature threshold, and start the low-temperature start mode to start the target vehicle if the current ambient temperature is less than the first preset temperature threshold.
For example, when it is detected that the fuel cell receives a command for starting the fuel cell from a vehicle controller of the vehicle, the temperature of the current environment may be collected by a temperature sensor configured on the target vehicle, for example, the temperature of the current environment is-10 ℃; assuming that the first preset temperature threshold is-5 ℃, since the temperature of-10 ℃ of the current environment is smaller than the first preset temperature threshold of-5 ℃, the target vehicle needs to be started in the low-temperature starting mode at this time.
And S120, acquiring the current temperature of the galvanic pile in a low-temperature starting mode, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold.
The stack temperature is the temperature of the fuel cell stack, and can be acquired by a stack temperature sensor arranged in the fuel cell stack. The second predetermined temperature threshold is a predetermined temperature value, which may be, for example, -20 ℃. The third predetermined temperature threshold is a predetermined temperature value, which may be, for example, 3 ℃. The long-term low-temperature starting mode indicates that the current environment temperature of the target vehicle is low, the galvanic pile is in a low-temperature environment for a long time, and the long-term low-temperature starting mode needs to be entered. The specific working contents of the long-time low-temperature starting mode are as follows: constant heating value and water yield are generated, voltage and current set values are determined according to the temperature of the galvanic pile, and then the starting function of the target vehicle is realized according to the voltage and current set values.
Specifically, in the low-temperature start mode, the target vehicle may enter the fast low-temperature start mode, the short-time low-temperature start mode, or the long-time low-temperature start mode according to different preset conditions. In the low-temperature starting mode, the current temperature of the fuel cell stack of the target vehicle is acquired and obtained through a stack temperature sensor arranged in the fuel cell stack, and a temperature difference value is obtained through the difference operation between the acquired current temperature of the stack and the current ambient temperature. And comparing the current temperature of the galvanic pile with a second preset temperature threshold, comparing a temperature difference value with a third preset temperature threshold, and if the current temperature of the galvanic pile is smaller than the second preset temperature threshold and the temperature difference value between the current temperature of the galvanic pile and the ambient temperature is smaller than the third preset temperature threshold, entering a long-time low-temperature starting mode by the target vehicle.
For example, in the low-temperature start mode, the current temperature of the fuel cell stack of the target vehicle is acquired and obtained through a stack temperature sensor arranged in the fuel cell stack, for example, the current temperature of the stack is-25 ℃, and a temperature difference value, for example, the temperature difference value is-15 ℃, is obtained by calculating the difference between the acquired current temperature of the stack and the current ambient temperature. The second preset temperature threshold is assumed to be-20 deg.c and the second preset temperature threshold is 3 deg.c. And comparing the current temperature of the galvanic pile of minus 25 ℃ with a second preset temperature threshold of minus 20 ℃, and comparing the temperature difference of minus 15 ℃ with a third preset temperature threshold of 3 ℃, so that the current temperature of the galvanic pile is less than the second preset temperature threshold, and when the temperature difference between the current temperature of the galvanic pile and the ambient temperature is less than the third preset temperature threshold, the target vehicle enters a long-time low-temperature starting mode.
S130, under a low-temperature starting mode, according to the current temperature of the electric pile, determining a first preset current value and a first preset voltage value, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the electric pile voltage of the electric pile to reach a second preset voltage value.
The first preset current value is a preset current value, and may be 5A, for example. The first predetermined voltage value is a predetermined voltage value, and may be 10V, for example. An air compressor is a device for compressing gas, and the stack voltage of a fuel cell of a target vehicle can be varied by controlling the rotation speed of the air compressor. The back pressure valve is a device for controlling pressure, and can change the stack voltage of the fuel cell of the target vehicle by controlling the opening degree of the back pressure valve. The voltage of the fuel cell stack can be controlled by controlling the rotating speed of the air compressor and the opening degree of the back pressure valve. The second predetermined voltage value is a predetermined voltage value, and may be 15V, for example.
Specifically, in the low-temperature start mode, the target vehicle may determine a first preset current value and a first preset voltage value according to the current stack temperature. At the moment, the water pump is not started, air and hydrogen are supplied to the fuel cell of the target vehicle, the current value is adjusted to a first preset current value by the DC converter, and the first preset current value acts on the fuel cell; meanwhile, the fuel cell works in a low-flow high-pressure state by controlling the rotating speed of the air compressor and the opening degree of the back pressure valve until the voltage of the electric pile reaches a second preset voltage value.
And S140, monitoring the temperature of the electric pile and the temperature rising rate of the electric pile so as to control the target vehicle to start based on the temperature of the electric pile and the temperature rising rate of the electric pile.
The temperature rise rate of the electric pile is the temperature rise speed of the electric pile of the fuel cell of the target vehicle, and the temperature rise speed of the electric pile can be represented.
Specifically, in the process of starting the target vehicle at a low temperature, the temperature of the cell stack and the temperature rise rate of the cell stack are continuously monitored, and when the temperature of the cell stack and the temperature rise rate of the cell stack reach a certain preset condition, the target vehicle can be controlled to be switched to other starting modes to execute a starting function.
The invention discloses a low-temperature start control method and device, electronic equipment and a storage medium. When a starting signal is received, acquiring the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold; in the low-temperature starting mode, acquiring the current temperature of the galvanic pile, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold; in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the temperature of the electric pile to reach a second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the target vehicle launch based on the stack temperature and the stack temperature rise rate. The invention solves the problem of inconsistent water yield and heat productivity of low-temperature starting of the fuel cell, can control the fuel cell to work under preset voltage and current at different temperatures by controlling the reactant supply conditions, ensures constant heat productivity and water yield, and determines whether to switch the starting mode or not by the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until the galvanic pile reaches the preset temperature and is started successfully, so that the fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.
Example two
Fig. 3 is a flowchart of a low-temperature start control method according to a second embodiment of the present invention. The embodiment of the present invention further refines S140 on the basis of the above-mentioned embodiments, and the embodiment of the present invention may be combined with various alternatives in one or more of the above-mentioned embodiments. As shown in fig. 3, the method includes:
s210, when the starting signal is received, obtaining the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold value.
S220, in the low-temperature starting mode, obtaining the current temperature of the galvanic pile, and when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference value between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold, entering a long-time low-temperature starting mode.
And S230, in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the voltage of the electric pile to reach a second preset voltage value.
And S240, monitoring the stack temperature and the stack temperature rise rate to control the target vehicle to start based on the stack temperature and the stack temperature rise rate.
S250, entering a short-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a fourth preset temperature threshold value or the temperature difference value is smaller than a fifth preset temperature threshold value; wherein the short-time low-temperature start-up mode corresponds to a constant water production;
wherein, the fourth preset temperature threshold is a preset temperature value, and may be-10 ℃. The fifth predetermined temperature threshold is a predetermined temperature value, which may be, for example, 5 ℃. The short-time low-temperature starting mode indicates that the current environment temperature of the target vehicle is low, the galvanic pile is in a low-temperature environment for a short time, and the short-time low-temperature starting mode needs to be entered. The short-time low-temperature start mode corresponds to a constant water yield.
Specifically, in the low-temperature start mode, the target vehicle may enter the fast low-temperature start mode, the short-time low-temperature start mode, or the long-time low-temperature start mode according to different preset conditions. In the low-temperature starting mode, the current temperature of the fuel cell stack of the target vehicle is acquired and obtained through a stack temperature sensor arranged in the fuel cell stack, and a temperature difference value is obtained by performing difference operation on the acquired current temperature of the stack and the current ambient temperature. And comparing the current temperature of the galvanic pile with a fourth preset temperature threshold, comparing a temperature difference value with a fifth preset temperature threshold, and if the current temperature of the galvanic pile is less than the fourth preset temperature threshold and the temperature difference value between the current temperature of the galvanic pile and the ambient temperature is less than the fifth preset temperature threshold, entering a short-time low-temperature starting mode by the target vehicle.
For example, in the low-temperature start mode, the current temperature of the fuel cell stack of the target vehicle is acquired and obtained through a stack temperature sensor configured in the fuel cell stack, for example, the current temperature of the stack is-15 ℃, the current ambient temperature is-10 ℃, and a temperature difference value is obtained by performing a difference operation on the acquired current temperature of the stack and the current ambient temperature, where the temperature difference value is-5 ℃. The fourth preset temperature threshold is assumed to be-10 ℃ and the fifth preset temperature threshold is assumed to be 5 ℃. And comparing the current temperature of the galvanic pile of minus 15 ℃ with a fourth preset temperature threshold of minus 10 ℃, and comparing the temperature difference of minus 5 ℃ with a fifth preset temperature threshold of 5 ℃, so that the current temperature of the galvanic pile is less than the fourth preset temperature threshold, and when the temperature difference between the current temperature of the galvanic pile and the ambient temperature is less than the fifth preset temperature threshold, the target vehicle enters a short-time low-temperature starting mode at the moment.
S260, determining a second preset current value according to the current temperature of the galvanic pile, and adjusting the water pump to operate at the lowest rotating speed so as to load the current value to the second preset current value;
the second preset current value is a preset current value, and may be 8A, for example. The water pump is a cooling device arranged on the fuel cell stack, can be used for balancing the temperature of the stack and plays a role in heat dissipation.
Specifically, the target vehicle may determine the second preset current value according to the current stack temperature in the low-temperature start mode. And adjusting the water pump to operate at the lowest rotating speed, supplying air and hydrogen to the fuel cell of the target vehicle, and adjusting the current value of the fuel cell of the target vehicle to a second preset current value by the DC converter.
S270, controlling the rotating speed of the air compressor and the opening degree of a back pressure valve to reduce the output voltage of the galvanic pile and monitoring the temperature of the galvanic pile;
on the basis of the steps, the rotating speed of the air compressor and the opening degree of the back pressure valve are controlled, the output voltage of the electric pile is reduced as much as possible under the condition that the electric pile is allowed, and the electric pile temperature of the fuel cell of the target vehicle is continuously monitored.
S280, entering a rapid low-temperature starting mode when the temperature of the galvanic pile is higher than a target preset temperature threshold value;
wherein the fast low-temperature start-up mode corresponds to a constant voltage loading mode.
In the present embodiment, the target preset temperature threshold is a preset temperature value different from other preset temperature thresholds, for example, 10 ℃. The rapid low-temperature starting mode indicates that the current environment temperature of the target vehicle is low, and the target vehicle needs to be rapidly started. The stack temperature of the target vehicle fuel cell is continuously monitored during the process of reducing the stack output voltage. And when the temperature of the galvanic pile is higher than a target preset temperature threshold value, entering a rapid low-temperature starting mode, wherein the fuel cell works in a constant voltage loading mode in the rapid low-temperature starting mode.
Further, in a fast low-temperature starting mode, the control voltage value is loaded to a second preset voltage value, the rotating speed of the air compressor and the opening degree of the back pressure valve are controlled, the air metering ratio is kept to be a first ratio, and the current value of the electric pile reaches a preset limiting current.
The first ratio is a predetermined ratio, and may be 1.2, for example. The preset limit current is a preset current value, and may be 200A, for example.
In the practical application process, when the long-time low-temperature starting mode is not entered in the low-temperature starting mode and the short-time low-temperature starting mode is not entered, the fast low-temperature starting mode is entered according to the preset condition of the temperature of the galvanic pile. The rapid low-temperature starting mode is started in a constant voltage loading mode, the rapid low-temperature starting mode runs at the lowest rotating speed of the water pump, air and hydrogen are supplied to the fuel cell of the target vehicle, the working voltage of the fuel cell is loaded to a second preset voltage value by the DC converter, and the rotating speed of the air compressor and the opening degree of the back pressure valve are controlled, so that the air metering ratio is kept at a first ratio, for example 1.2. At this time, as the temperature rises, the stack current will gradually rise until a preset limit current, for example, 200A, is reached, and then the fuel cell is operated while maintaining the preset limit current.
Optionally, the method further includes:
monitoring a stack temperature of the stack; when the temperature of the galvanic pile is higher than a sixth preset temperature threshold value, the startup is finished; and when the current temperature is less than the sixth preset temperature threshold, returning to the monitoring of the temperature of the electric pile.
The sixth preset temperature threshold is a preset temperature value, and may be, for example, 30 ℃.
In this embodiment, in the low-temperature start mode, the stack temperature sensor disposed on the fuel cell continuously monitors the temperature of the stack, and when the temperature of the stack is higher than the sixth preset temperature threshold, it indicates that the low-temperature start of the target vehicle is completed; if the temperature of the stack is less than the sixth preset temperature threshold, the low-temperature start is not finished, and the temperature of the fuel cell stack needs to be continuously monitored until the temperature of the stack is higher than the sixth preset temperature threshold, which indicates that the start is finished.
The invention discloses a low-temperature start control method and device, electronic equipment and a storage medium. The technical scheme disclosed by the invention solves the problem of inconsistent water yield and heat productivity of the low-temperature start of the fuel cell, and three start modes are set: the fuel cell can be controlled to work under preset voltage and current at different temperatures by controlling reactant supply conditions, so that the heat productivity and the water yield are constant, and whether the starting mode is switched or not is determined by the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until the galvanic pile reaches the preset temperature and is started successfully, so that the fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.
EXAMPLE III
Fig. 4 is a flowchart of a low-temperature start control method according to a third embodiment of the present invention. The embodiments of the present invention further refine S110 and S120 on the basis of the above embodiments, and the embodiments of the present invention may be combined with various alternatives in one or more of the above embodiments. As shown in fig. 4, the method includes:
s310, when the starting signal is received, the environment temperature of the environment to which the target vehicle belongs is obtained, and when the environment temperature is lower than a first preset temperature threshold value, a low-temperature starting mode is started.
And S320, if the ambient temperature is greater than the first preset temperature threshold value, starting the target vehicle based on the normal-temperature starting mode.
The normal-temperature starting mode is that when the target vehicle is at the normal-temperature environment temperature, chemical substances in a fuel cell of the target vehicle can normally react, the charging and discharging efficiency is normal, and the target vehicle can be smoothly started to supply power to the target vehicle.
Specifically, if the temperature of the current environment acquired by the temperature sensor arranged on the target vehicle is greater than the first preset temperature threshold, it indicates that the current environment temperature is not in accordance with the condition for starting the target vehicle at a low temperature, and the normal-temperature starting mode can meet the starting function of the target vehicle.
S330, in the low-temperature starting mode, acquiring the current temperature of the galvanic pile, and entering the long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold.
And S340, entering a short-time low-temperature starting mode when the temperature of the galvanic pile is greater than a seventh preset temperature threshold and the temperature rise rate of the galvanic pile is greater than a preset rate threshold.
The seventh preset temperature threshold is a preset temperature value, and may be, for example, 0 ℃. The preset rate threshold is a preset value, and may be, for example, 0.5 ℃/s.
In this embodiment, when the target vehicle is operating in the low-temperature start mode, the temperature of the stack may be monitored in real time, and the stack temperature rise rate may be calculated in real time. And when the monitored temperature of the cell stack of the target vehicle fuel cell is greater than a seventh preset temperature threshold value and the temperature rise rate of the cell stack of the target vehicle fuel cell is greater than a preset rate threshold value, entering a short-time low-temperature starting mode.
Optionally, when the temperature of the stack is less than the seventh preset temperature threshold, or the temperature rise rate of the stack is less than the preset rate threshold, the operation of monitoring the temperature of the stack and the temperature rise rate of the stack is performed in a feedback manner until the short-time low-temperature start mode is entered.
In this embodiment, when it is monitored that the stack temperature of the fuel cell of the target vehicle is less than the seventh preset temperature threshold, or the stack temperature rise rate of the fuel cell of the target vehicle is less than the preset rate threshold, it is necessary to continuously monitor the stack temperature of the fuel cell and the stack temperature rise rate of the fuel cell of the target vehicle until the stack temperature and the stack temperature rise rate satisfy the condition of entering the short-time low-temperature start mode, and enter the short-time low-temperature start mode.
And S350, in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the temperature of the electric pile to reach a second preset voltage value.
And S360, monitoring the temperature of the electric pile and the temperature rising rate of the electric pile to control the target vehicle to start based on the temperature of the electric pile and the temperature rising rate of the electric pile.
The invention discloses a low-temperature start control method and device, electronic equipment and a storage medium. When a starting signal is received, acquiring the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold; if the ambient temperature is greater than a first preset temperature threshold, starting the target vehicle based on a normal-temperature starting mode; in the low-temperature starting mode, acquiring the current temperature of the galvanic pile, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold; when the temperature of the galvanic pile is greater than a seventh preset temperature threshold value and the temperature rise rate of the galvanic pile is greater than a preset rate threshold value, entering a short-time low-temperature starting mode; in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the temperature of the electric pile to reach a second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the target vehicle launch based on the stack temperature and the stack temperature rise rate. According to the invention, whether the starting mode is switched or not is determined by the temperature of the electric pile and the temperature rise rate of the electric pile until the electric pile reaches the preset temperature and is started successfully, so that the fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.
Example four
In the embodiment of the present invention, a process of describing the low temperature start control method in a specific embodiment is shown in fig. 5. In this embodiment, the low-temperature start mode can be specifically subdivided into three modes: a fast low-temperature start mode, a short-time low-temperature start mode and a long-time low-temperature start mode. The whole process of the low-temperature start of the target vehicle can be divided into three stages: the first stage, selecting a starting mode as a low-temperature starting mode or a normal-temperature starting mode according to the environmental temperature; the second stage, selecting a low-temperature starting mode as a quick low-temperature starting mode, a short-time low-temperature starting mode or a long-time low-temperature starting mode according to the temperature of the galvanic pile; and in the third stage, switching a starting mode according to the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until the starting is finished.
The embodiment of the invention provides a specific flow of a low-temperature starting control method of a fuel cell, and the specific flow is shown in fig. 6. When the low-temperature starting function of the target vehicle is started, monitoring the current ambient temperature value by an ambient temperature sensor arranged on the target vehicle:
when the environmental temperature is not lower than the preset temperature T1 (for example-5 ℃), entering a normal-temperature starting mode, and finishing starting; and when the ambient temperature is lower than the temperature T1, entering a low-temperature starting mode.
And if the low-temperature starting mode is entered, monitoring the value of a target vehicle fuel cell stack temperature sensor, and if the temperature of the stack is lower than a preset value temperature T2 (for example-20 ℃) and the difference value between the temperature of the stack and the current environment is less than a preset temperature T3 (for example 3 ℃), indicating that the target vehicle is in a low environment temperature and the target vehicle fuel cell stack is in a low-temperature environment for a long time, entering the long-time low-temperature starting mode. The long-time low-temperature starting mode works in a mode of constant heating value and water yield, and the specific working process is as follows: the control device can determine the set values of the voltage and the current of the fuel cell according to the temperature of the electric pile; in the mode, the water pump is not started, air and hydrogen are supplied to the fuel cell, and the DC converter inputs loading current for the fuel cell until the input current of the fuel cell reaches preset current; controlling the rotating speed of the air compressor and the opening of the back pressure valve so that the fuel cell works in a low-flow high-pressure state at the moment until the voltage of the electric pile reaches a preset voltage; and monitoring the temperature of the electric pile and the temperature rising rate of the electric pile until the temperature of the electric pile is higher than a preset value T6 (such as 0 ℃) and the temperature rising rate is higher than (such as 0.5 ℃/s), and switching to a short-time low-temperature starting mode.
If the fuel cell of the target vehicle does not enter the long-time low-temperature starting mode in the low-temperature starting mode, whether the temperature of the cell stack is lower than a preset temperature T4 (for example-10 ℃) or not is judged, or the difference value between the temperature of the cell stack and the current environment is smaller than a preset temperature T5 (for example 5 ℃) is judged, and then the short-time low-temperature starting mode is entered. The short duration cold start mode operates with constant water production. The specific working process is as follows: the fuel cell determines a current set value flowing into the fuel cell according to the temperature of the electric pile; the water pump runs at the lowest rotating speed and supplies air and hydrogen to the fuel cell, and the DC converter inputs loading current to preset current for the fuel cell; and controlling the rotating speed of the air compressor and the opening of the back pressure valve, reducing the output voltage of the fuel cell stack as much as possible under the condition that the stack is allowed, acquiring the temperature of the stack by using a stack temperature sensor arranged in the fuel cell, monitoring the temperature of the stack until the temperature of the stack is higher than a preset value T7 (for example, 10 ℃), and switching to a quick low-temperature starting mode.
And when the long-time low-temperature starting mode is not entered in the low-temperature starting mode, or the short-time low-temperature starting mode is not entered, the fast low-temperature starting mode is entered. The mode of quick low-temperature starting mode constant voltage loading works. The specific working process is as follows: the water pump runs at the lowest rotating speed and supplies air and hydrogen to the fuel cell, and the DC converter inputs loading current to preset current for the fuel cell; controlling the rotating speed of the air compressor and the opening degree of the back pressure valve, and keeping the air metering ratio at a preset ratio, such as 1.2; as the temperature of the fuel cell stack rises, the stack current will gradually rise until a preset current, for example 200A, is reached, and the operation is maintained under the condition; thereafter, the stack temperature is continuously monitored until the stack temperature is higher than a preset value temperature T8, for example, 30 ℃, at which time the low temperature start function of the target vehicle is performed.
The technical scheme disclosed by the invention solves the problem of inconsistent water yield and heat productivity of low-temperature starting of the fuel cell, and three starting modes are set: the fuel cell can be controlled to work under preset voltage and current at different temperatures by controlling the reactant supply conditions, so that the constant heat productivity and water yield are ensured, and whether the starting mode is switched or not is determined by the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until the galvanic pile reaches the preset temperature and is started successfully, so that the fuel cell can be started smoothly, and the efficiency of starting the fuel cell is improved.
EXAMPLE five
Fig. 7 is a schematic structural diagram of a low-temperature start control apparatus according to a fifth embodiment of the present invention, which can execute a low-temperature start control method according to the fifth embodiment of the present invention. The device includes:
the low-temperature starting module 410 is used for acquiring the environmental temperature of the environment to which the target vehicle belongs when receiving the starting signal, and starting a low-temperature starting mode when the environmental temperature is lower than a first preset temperature threshold;
the long-time low-temperature starting module 420 is configured to, in the low-temperature starting mode, obtain a current temperature of the cell stack, and enter the long-time low-temperature starting mode when the current temperature of the cell stack is smaller than a second preset temperature threshold and a temperature difference between the current temperature of the cell stack and an ambient temperature is smaller than a third preset temperature threshold;
the low-temperature starting adjustment module 430 is configured to determine a first preset current value and a first preset voltage value according to a current temperature of the stack in a low-temperature starting mode, to adjust the current value to the first preset current value, and to control a rotation speed of the air compressor and an opening degree of the back pressure valve, so that a stack voltage of the stack reaches a second preset voltage value;
a vehicle launch control module 440 to monitor the stack temperature and the stack temperature rise rate to control a target vehicle launch based on the stack temperature and the stack temperature rise rate.
On the basis of the above embodiment, the apparatus further includes:
the short-time low-temperature starting module is used for entering a short-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a fourth preset temperature threshold value or a temperature difference value is smaller than a fifth preset temperature threshold value;
the short-time low-temperature adjusting module is used for determining a second preset current value according to the current temperature of the galvanic pile and adjusting the water pump to operate at the lowest rotating speed so as to load the current value to the second preset current value;
the electric pile temperature monitoring module is used for controlling the rotating speed of the air compressor and the opening degree of the back pressure valve so as to reduce the output voltage of the electric pile and monitor the electric pile temperature of the electric pile;
and the quick low-temperature starting module is used for entering a quick low-temperature starting mode when the temperature of the galvanic pile is higher than a target preset temperature threshold value.
On the basis of the above embodiment, the rapid low-temperature start module further includes a voltage control submodule, and is specifically configured to, in the rapid low-temperature start mode, control the voltage value to be loaded to a second preset voltage value, and control the rotation speed of the air compressor and the opening degree of the back pressure valve, so as to keep the air metering ratio as the first ratio, and to make the current value of the cell stack reach the preset limit current.
On the basis of the above embodiment, the voltage control sub-module includes: the system comprises a galvanic pile temperature monitoring unit, a starting completion unit and a temperature monitoring return unit.
The electric pile temperature monitoring unit is used for monitoring the electric pile temperature of the electric pile;
the starting completion unit is used for completing the starting when the temperature of the galvanic pile is higher than a sixth preset temperature threshold value;
and the temperature monitoring returning unit is used for returning to execute monitoring of the temperature of the electric pile when the current temperature is smaller than a sixth preset temperature threshold value.
On the basis of the above embodiment, the apparatus further includes:
and the short-time low-temperature starting submodule is used for entering a short-time low-temperature starting mode when the temperature of the galvanic pile is greater than a seventh preset temperature threshold and the temperature rise rate of the galvanic pile is greater than a preset rate threshold.
On the basis of the above embodiment, the apparatus further includes:
and the feedback execution monitoring submodule is used for feeding back and executing the operation of monitoring the temperature of the galvanic pile and the temperature rise rate of the galvanic pile when the temperature of the galvanic pile is less than a seventh preset temperature threshold value or the temperature rise rate of the galvanic pile is less than a preset rate threshold value until the short-time low-temperature starting mode is entered.
On the basis of the above embodiment, the apparatus further includes:
and the normal-temperature starting submodule is used for starting the target vehicle based on the normal-temperature starting mode if the ambient temperature is greater than a first preset temperature threshold.
The invention discloses a low-temperature start control method and device, electronic equipment and a storage medium. When a starting signal is received, acquiring the environment temperature of the environment to which the target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold; in the low-temperature starting mode, acquiring the current temperature of the galvanic pile, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold; in a low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the temperature of the electric pile to reach a second preset voltage value; the stack temperature and the stack temperature rise rate are monitored to control the target vehicle launch based on the stack temperature and the stack temperature rise rate. The invention solves the problem of inconsistent water yield and heat productivity of low-temperature start of the fuel cell, sets three start modes, namely rapid low-temperature start/short-time low-temperature start/long-time low-temperature start, can control the fuel cell to work under preset voltage and current at different temperatures by controlling the reactant supply conditions, ensures constant heat productivity and water yield, and determines whether to switch the start modes or not by controlling the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until the galvanic pile reaches the preset temperature for successful start, so that the fuel cell can be started smoothly, the efficiency of starting the fuel cell is improved, and the overall performance of the fuel cell is improved.
EXAMPLE six
Fig. 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 8, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from a storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 performs the various methods and processes described above, such as a road surface identification method.
In some embodiments, the pavement identification method may be implemented as a computer program that is tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the road surface identification method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the road surface identification method by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CR temperature T (cathode ray tube) or an LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome. It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved. The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cold start control method, comprising:
when a starting signal is received, acquiring the environment temperature of the environment to which a target vehicle belongs, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold;
acquiring the current temperature of the galvanic pile in the low-temperature starting mode, and entering a long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold;
in the low-temperature starting mode, determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile, adjusting the current value to be the first preset current value, and controlling the rotating speed of the air compressor and the opening degree of the back pressure valve to enable the voltage of the electric pile to reach a second preset voltage value;
monitoring the stack temperature and stack temperature rise rate to control the target vehicle launch based on the stack temperature and the stack temperature rise rate.
2. The method of claim 1, further comprising:
when the current temperature of the galvanic pile is smaller than a fourth preset temperature threshold value or the temperature difference value is smaller than a fifth preset temperature threshold value, entering a short-time low-temperature starting mode; wherein the short-time low-temperature start-up mode corresponds to a constant water production;
determining a second preset current value according to the current temperature of the galvanic pile, and adjusting a water pump to operate at the lowest rotation speed so as to load the current value to the second preset current value;
controlling the rotating speed of an air compressor and the opening degree of a back pressure valve to reduce the output voltage of the galvanic pile and monitoring the temperature of the galvanic pile;
when the temperature of the galvanic pile is higher than a target preset temperature threshold value, entering a rapid low-temperature starting mode;
wherein the fast low-temperature start-up mode corresponds to a constant voltage loading mode.
3. The method of claim 2, further comprising:
and under the rapid low-temperature starting mode, the control voltage value is loaded to a second preset voltage value, and the rotating speed of the air compressor and the opening degree of the back pressure valve are controlled to keep the air metering ratio as a first ratio so that the current value of the electric pile reaches a preset limiting current.
4. The method of claim 3, further comprising:
monitoring a stack temperature of the stack;
when the temperature of the galvanic pile is higher than a sixth preset temperature threshold value, the startup is finished;
and when the current temperature is smaller than the sixth preset temperature threshold, returning to monitor the temperature of the electric pile.
5. The method of claim 1, further comprising:
and when the temperature of the galvanic pile is greater than a seventh preset temperature threshold value and the temperature rise rate of the galvanic pile is greater than a preset rate threshold value, entering a short-time low-temperature starting mode.
6. The method of claim 5, further comprising:
and when the temperature of the galvanic pile is smaller than the seventh preset temperature threshold value or the temperature rise rate of the galvanic pile is smaller than the preset rate threshold value, feeding back and executing the operation of monitoring the temperature of the galvanic pile and the temperature rise rate of the galvanic pile until entering the short-time low-temperature starting mode.
7. The method of claim 1, further comprising:
and if the ambient temperature is greater than a first preset temperature threshold value, starting the target vehicle based on a normal-temperature starting mode.
8. A cold start control device, the device comprising:
the low-temperature starting module is used for acquiring the environment temperature of the environment to which the target vehicle belongs when a starting signal is received, and starting a low-temperature starting mode when the environment temperature is lower than a first preset temperature threshold value;
the long-time low-temperature starting module is used for acquiring the current temperature of the galvanic pile in the low-temperature starting mode, and entering the long-time low-temperature starting mode when the current temperature of the galvanic pile is smaller than a second preset temperature threshold and the temperature difference value between the current temperature of the galvanic pile and the ambient temperature is smaller than a third preset temperature threshold;
the low-temperature starting adjustment module is used for determining a first preset current value and a first preset voltage value according to the current temperature of the electric pile in the low-temperature starting mode, so that the adjustment current value is the first preset current value, and the rotating speed of the air compressor and the opening degree of the back pressure valve are controlled, so that the temperature of the electric pile reaches a second preset voltage value;
a vehicle start-up control module to monitor the stack temperature and stack temperature rise rate to control the target vehicle start-up based on the stack temperature and stack temperature rise rate.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the cold start control method of any one of claims 1-7.
10. A computer-readable storage medium storing computer instructions for causing a processor to implement the cold start control method of any one of claims 1-7 when executed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116544454A (en) * | 2023-05-06 | 2023-08-04 | 苏州金鲤飞鱼科技有限公司 | Method and device for starting fuel cell system for vehicle at low temperature, automobile and medium |
| CN116646561A (en) * | 2023-06-15 | 2023-08-25 | 北京亿华通科技股份有限公司 | Control method for low-temperature self-starting of fuel cell |
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2022
- 2022-10-09 CN CN202211229064.XA patent/CN115498218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116544454A (en) * | 2023-05-06 | 2023-08-04 | 苏州金鲤飞鱼科技有限公司 | Method and device for starting fuel cell system for vehicle at low temperature, automobile and medium |
| CN116544454B (en) * | 2023-05-06 | 2024-07-30 | 苏州金鲤飞鱼科技有限公司 | Method and device for starting fuel cell system for vehicle at low temperature, automobile and medium |
| CN116646561A (en) * | 2023-06-15 | 2023-08-25 | 北京亿华通科技股份有限公司 | Control method for low-temperature self-starting of fuel cell |
| CN116646561B (en) * | 2023-06-15 | 2024-02-23 | 北京亿华通科技股份有限公司 | Control method for low-temperature self-starting of fuel cell |
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