CN114614051A - Fuel cell thermal management control method, device, medium and electronic equipment - Google Patents

Fuel cell thermal management control method, device, medium and electronic equipment Download PDF

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CN114614051A
CN114614051A CN202210166074.7A CN202210166074A CN114614051A CN 114614051 A CN114614051 A CN 114614051A CN 202210166074 A CN202210166074 A CN 202210166074A CN 114614051 A CN114614051 A CN 114614051A
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fuel cell
temperature
thermal management
management control
cooling
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CN114614051B (en
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贺翀
陈明
王子剑
吴星成
杨佳希
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0432—Temperature; Ambient temperature
    • 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
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
    • 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
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04701—Temperature
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04858—Electric variables
    • H01M8/04925—Power, energy, capacity or load
    • H01M8/04932—Power, energy, capacity or load of the individual fuel cell
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
    • 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
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Fuel Cell (AREA)

Abstract

The application relates to the technical field of fuel cell thermal management control, and discloses a fuel cell thermal management control method, a fuel cell thermal management control device, a fuel cell thermal management control medium and electronic equipment. The method comprises the following steps: acquiring the temperature of a fuel cell in real time, and acquiring a temperature early warning value of the fuel cell, wherein the temperature early warning value is smaller than an upper limit value of the temperature allowing the fuel cell to operate; if the battery temperature is greater than or equal to the temperature early warning value, starting a thermal management intervention program aiming at the fuel battery; and performing thermal management control on the fuel cell based on the thermal management intervention program so as to control the cell temperature of the fuel cell below the temperature early warning value. The temperature of the fuel cell system can be always kept within a reasonable range by the method and the device, so that the emergency shutdown of the fuel cell system due to the fact that the temperature exceeds the upper limit is avoided.

Description

Fuel cell thermal management control method, device, medium and electronic equipment
Technical Field
The present disclosure relates to the field of fuel cell thermal management control technologies, and in particular, to a fuel cell thermal management control method, apparatus, medium, and electronic device.
Background
At present, in the technical field of fuel cell thermal management control, especially in the technical field of fuel cell thermal management control of new energy vehicles, most of thermal management control methods for fuel cells focus on how to improve the heat dissipation capability of a cooling system, and the processing method at high temperature of the fuel cells is simple, that is, after the temperature of the fuel cells exceeds an allowable upper limit, the fuel cells send temperature overrun faults and stop, and direct stop caused by the overtemperature of the fuel cells brings poor experience or even potential safety hazards to users.
Therefore, how to keep the temperature of the fuel cell system within a reasonable range all the time so as to avoid the emergency shutdown of the fuel cell system due to the temperature exceeding the upper limit is an urgent technical problem to be solved.
Disclosure of Invention
The application aims to provide a fuel cell thermal management control method and device, a computer-readable storage medium and electronic equipment. The temperature of the fuel cell system can be always kept within a reasonable range by the application, so that the emergency stop of the fuel cell system due to the fact that the temperature exceeds the upper limit is avoided.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.
According to an aspect of an embodiment of the present application, there is provided a fuel cell thermal management control method including: acquiring the temperature of a fuel cell in real time, and acquiring a temperature early warning value of the fuel cell, wherein the temperature early warning value is smaller than an upper limit value of the temperature allowing the fuel cell to operate; if the battery temperature is greater than or equal to the temperature early warning value, starting a thermal management intervention program aiming at the fuel battery; and performing thermal management control on the fuel cell based on the thermal management intervention program so as to control the cell temperature of the fuel cell below the temperature early warning value.
In an embodiment of the present application, based on the foregoing solution, the thermal management intervention program includes a first intervention program for a cooling system and a second intervention program for the fuel cell, where the cooling system is configured to perform physical cooling on the fuel cell, and the thermal management control on the fuel cell based on the thermal management intervention program includes: performing thermal management control on the fuel cell through the cooling system based on the first intervention program; after the fuel cell is subjected to thermal management control through the cooling system, if the cell temperature is greater than or equal to the temperature early warning value, the fuel cell is subjected to thermal management control based on the second intervention program.
In one embodiment of the present application, based on the foregoing solution, the cooling system includes a plurality of cooling devices, and the thermal management control of the fuel cell by the cooling system based on the first intervention program includes: selecting a target cooling device from the plurality of cooling devices, and performing thermal management control on the fuel cell through the target cooling device; after the thermal management control is performed on the fuel cell through the target cooling device, if the cell temperature is greater than or equal to the temperature warning value, other cooling devices except the target cooling device are sequentially selected from the plurality of cooling devices to perform thermal management control on the fuel cell until all the plurality of cooling devices are selected or the cell temperature is less than the temperature warning value.
In an embodiment of the present application, based on the foregoing solution, the performing thermal management control on the fuel cell by the target cooling device includes: obtaining the current cooling power of the target cooling device and obtaining the upper limit cooling power of the target cooling device; adjusting the cooling power of the target cooling device to the upper limit cooling power if the current cooling power is less than the upper limit cooling power.
In one embodiment of the present application, based on the foregoing solution, the cooling device includes at least a thermostat, a cooling water pump, and a cooling fan.
In an embodiment of the present application, based on the foregoing solution, the performing thermal management control on the fuel cell based on the second intervention procedure includes: acquiring a temperature change value of the fuel cell within a set time, required output power for the fuel cell, and upper limit output power of the fuel cell; determining candidate output power of the fuel cell according to the temperature change value and the required output power; selecting a minimum value from the upper limit output power and the candidate output power as a new upper limit output power, and adjusting the power output of the fuel cell according to the new upper limit output power; and if the battery temperature is greater than or equal to the temperature early warning value, returning to execute the steps of acquiring the temperature change value of the fuel battery within the set time, the required output power of the fuel battery and the upper limit output power of the fuel battery until the battery temperature is less than the temperature early warning value.
In one embodiment of the present application, based on the foregoing, the determining the candidate output power of the fuel cell based on the temperature change value and the required output power includes: determining the candidate output power of the fuel cell by the following formula:
Pselected＝Prquest-MK
wherein ,PselectedRepresenting a candidate output power of the fuel cell; prquestRepresenting a required output power for the fuel cell; m represents a power intervention coefficient; and K represents the temperature change value of the fuel cell in a set time.
According to an aspect of an embodiment of the present application, there is provided a fuel cell thermal management control apparatus including: the fuel cell system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the cell temperature of a fuel cell in real time and acquiring a temperature early warning value of the fuel cell, and the temperature early warning value is smaller than the upper limit value of the temperature allowing the fuel cell to operate; a starting unit, configured to start a thermal management intervention program for the fuel cell if the battery temperature is greater than or equal to the temperature warning value; and the control unit is used for carrying out thermal management control on the fuel cell based on the thermal management intervention program so as to control the cell temperature of the fuel cell below the temperature early warning value.
According to an aspect of an embodiment of the present application, there is provided a computer-readable storage medium on which a computer program is stored, the computer program comprising executable instructions that, when executed by a processor, implement the fuel cell thermal management control method as described in the above embodiment.
According to an aspect of an embodiment of the present application, there is provided an electronic device including: one or more processors; a memory for storing executable instructions of the processor, which when executed by the one or more processors, cause the one or more processors to implement the fuel cell thermal management control method as described in the embodiments above.
According to the technical scheme of the embodiment of the application, when the temperature of the fuel cell is close to the upper limit, active intervention is performed by starting a thermal management intervention program aiming at the fuel cell, so that thermal management control is triggered on the fuel cell, the temperature of a fuel cell system can be always kept in a reasonable range, and the emergency shutdown of the fuel cell system due to the fact that the temperature exceeds the upper limit is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a flowchart illustrating a fuel cell thermal management control method according to an embodiment of the present application;
fig. 2 is an overall flowchart of a fuel cell thermal management control method according to an embodiment of the present application;
fig. 3 is a block diagram illustrating a fuel cell thermal management control apparatus according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a fuel cell thermal management control system according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a computer-readable storage medium shown in accordance with an embodiment of the present application;
fig. 6 is a schematic diagram illustrating a system structure of an electronic device according to an embodiment of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the embodiments of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It should be noted that: reference herein to "a plurality" means two or more. "and/or" describe the association relationship of the associated objects, meaning that there may be three relationships, e.g., A and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It is noted that the terms first, second and the like in the description and claims of the present application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.
The implementation details of the technical solution of the embodiment of the present application are set forth in detail below:
first, it should be noted that the fuel cell thermal management control scheme provided in the present application may be applied to the related technical field of new energy vehicles, for example, for a new energy vehicle, power of the new energy vehicle mainly comes from a fuel cell, and a large amount of heat generated by the fuel cell during a discharging process may increase a temperature of the fuel cell, which affects performance and safety of the fuel cell.
According to an aspect of the present application, there is provided a fuel cell thermal management control method, and fig. 1 is a flowchart illustrating a fuel cell thermal management control method according to an embodiment of the present application, where the fuel cell thermal management control method may be executed by a device having a computing processing function, and the fuel cell thermal management control method includes at least steps 110 to 150, which are described in detail as follows:
in step 110, a cell temperature of a fuel cell is obtained in real time, and a temperature warning value of the fuel cell is obtained, where the temperature warning value is smaller than an upper limit of a temperature at which the fuel cell is allowed to operate.
In the application, the battery temperature of the fuel battery can be acquired through the information acquisition device, and the temperature early warning value of the fuel battery can be determined in a calibration mode.
It is emphasized that the temperature warning value needs to be smaller than the upper temperature limit value that allows the fuel cell to operate. For example, if the upper limit of the temperature for allowing the fuel cell to operate is 70 ℃, the temperature warning value may be determined to be 65 ℃ in a calibration manner.
With continued reference to fig. 1, in step 130, if the battery temperature is greater than or equal to the temperature warning value, a thermal management intervention procedure for the fuel cell is initiated.
In the present application, the thermal management intervention program may be a program that executes a thermal management strategy for the fuel cell, that is, the thermal management strategy and the thermal management logic for the fuel cell in the present application are embodied in a computer by the thermal management intervention program.
In the present application, the triggering condition for starting the thermal management intervention program for the fuel cell is that the battery temperature is greater than or equal to the temperature warning value, that is, when it is detected that the battery temperature acquired in real time is greater than or equal to the temperature warning value, the thermal management intervention program for the fuel cell is triggered to start. For example, when the temperature warning value is 65 ℃, if it is detected that the battery temperature acquired in real time is 65.5 ℃, a thermal management intervention program for the fuel cell is triggered and started.
With continued reference to fig. 1, in step 150, based on the thermal management intervention program, performing thermal management control on the fuel cell to control the cell temperature of the fuel cell below the temperature warning value.
In the present application, the thermal management intervention program may include a first intervention program for a cooling system for physically cooling the fuel cell, and the thermal management intervention program may further include a second intervention program for the fuel cell.
In this application, cooling system can be right fuel cell carries out physics cooling, and is concrete, cooling system can include a plurality of cooling device, and is concrete, cooling device can include one or more of cooling device such as thermostat, cooling water pump, cooling fan.
In an embodiment of the present application, the performing thermal management control on the fuel cell based on the thermal management intervention program may be performed according to the following steps 151 to 152:
and 151, performing thermal management control on the fuel cell through the cooling system based on the first intervention program.
And 152, after the fuel cell is subjected to thermal management control through the cooling system, if the battery temperature is greater than or equal to the temperature early warning value, performing thermal management control on the fuel cell based on the second intervention program.
In the method, when the fact that the battery temperature acquired in real time is greater than or equal to the temperature early warning value is detected, firstly, thermal management control is conducted on the fuel cell based on the cooling system, and if the battery temperature is still greater than or equal to the temperature early warning value after the thermal management control is conducted on the fuel cell based on the cooling system, the thermal management control is directly conducted on the fuel cell based on the second intervention program. It is understood that if the battery temperature is less than the temperature warning value, the thermal management control of the fuel cell is not required to be directly performed.
In an embodiment of the application, the performing, by the cooling system, thermal management control on the fuel cell based on the first intervention procedure may be performed according to the following steps 1511 to 1512:
and 1511, selecting a target cooling device from the plurality of cooling devices, and performing thermal management control on the fuel cell through the target cooling device.
Step 1512, after the thermal management control is performed on the fuel cell by the target cooling device, if the battery temperature is greater than or equal to the temperature warning value, sequentially selecting other cooling devices except the target cooling device from the plurality of cooling devices to perform thermal management control on the fuel cell until all the plurality of cooling devices are selected or the battery temperature is less than the temperature warning value.
Specifically, in this embodiment, the thermal management control of the fuel cell by the target cooling device may be performed according to the following steps 15111 to 15112:
step 15111, obtain the current cooling power of the target cooling device, and obtain the upper limit cooling power of the target cooling device.
Step 15112, if the current cooling power is less than the upper limit cooling power, adjusting the cooling power of the target cooling device to the upper limit cooling power.
In order that those skilled in the art will better understand the present embodiments, a specific example will be described.
For example, the cooling device in this example may include a thermostat, a cooling water pump, and a cooling fan, and may first obtain a current thermostat opening (i.e., current cooling power) and a maximum thermostat opening (i.e., upper limit cooling power) of the thermostat, determine whether the thermostat opening reaches the maximum, and if the thermostat opening does not reach the maximum, increase the thermostat opening until the thermostat opening reaches the maximum.
It should be noted that the thermostat is a component similar to a flow-controllable tee. When the cooling demand is smaller, the cooling liquid flows through one loop and does not pass through the radiator, and when the cooling demand is larger, the cooling liquid flows through the other loop and passes through the radiator.
And after the opening degree of the thermostat reaches the maximum value, continuously judging whether the battery temperature is greater than or equal to the temperature early warning value, and if the battery temperature is less than the temperature early warning value, directly carrying out thermal management control on the fuel battery.
If the battery temperature is larger than or equal to the temperature early warning value, the current rotating speed (namely the current cooling power) of the cooling water pump and the maximum rotating speed (namely the upper limit cooling power) of the cooling water pump are obtained, whether the rotating speed of the cooling water pump reaches the maximum value or not is judged, and if the rotating speed of the cooling water pump does not reach the maximum value, the rotating speed of the cooling water pump is increased until the rotating speed reaches the maximum rotating speed.
And after the rotating speed of the cooling water pump reaches the maximum value, continuously judging whether the temperature of the battery is greater than or equal to the temperature early warning value, and if the temperature of the battery is less than the temperature early warning value, directly carrying out thermal management control on the fuel cell.
If the battery temperature is larger than or equal to the temperature early warning value, the current rotating speed (namely the current cooling power) of the cooling fan and the maximum rotating speed (namely the upper limit cooling power) of the cooling fan are obtained, whether the rotating speed of the cooling fan reaches the maximum value or not is judged, and if the rotating speed of the cooling fan does not reach the maximum value, the rotating speed of the cooling fan is increased until the rotating speed reaches the maximum rotating speed.
And after the rotating speed of the cooling fan reaches the maximum value, continuously judging whether the battery temperature is greater than or equal to the temperature early warning value, and if the battery temperature is less than the temperature early warning value, directly carrying out thermal management control on the fuel cell.
And if the battery temperature is still greater than or equal to the temperature early warning value, directly carrying out thermal management control on the fuel battery.
It should be noted that, the above sequence of performing thermal management control on the fuel cell sequentially through the thermostat, the cooling water pump and the cooling fan is merely exemplary, and thermal management control may also be performed on the fuel cell sequentially according to other cooling device sequences, for example, first performing thermal management control on the fuel cell through the cooling fan, then performing thermal management control on the fuel cell through the cooling water pump, and then performing thermal management control on the fuel cell through the thermostat, which is not limited in this application.
In an embodiment of the present application, the thermal management control of the fuel cell based on the second intervention program may be performed according to the following steps 1521 to 1524:
step 1521, acquiring a temperature change value of the fuel cell within a set time, a required output power for the fuel cell, and an upper limit output power of the fuel cell.
Step 1522, determining candidate output power of the fuel cell according to the temperature change value and the required output power.
Step 1523, selecting the minimum value from the upper limit output power and the candidate output power as a new upper limit output power, and adjusting the power output of the fuel cell according to the new upper limit output power.
Step 1524, if the battery temperature is greater than or equal to the temperature warning value, returning to execute the steps of obtaining the temperature change value of the fuel battery within the set time, the required output power of the fuel battery and the upper limit output power of the fuel battery until the battery temperature is less than the temperature warning value.
In this embodiment, the determining the candidate output power of the fuel cell based on the temperature change value and the required output power includes: determining candidate output power of the fuel cell by the following formula:
Pselected＝Prquest-MK
wherein ,PselectedRepresenting a candidate output power of the fuel cell; prquestRepresenting a required output power for the fuel cell; m represents a power intervention coefficient, wherein M can be a constant value or a variable obtained by calibration; k represents the temperature change value of the fuel cell in the set time, wherein K can be a positive value or a negative value, and when K is the positive value, the fuel cell is indicated to be in the set timeWhen K is negative, it indicates that the temperature of the fuel cell is decreased within a set time.
In order to make the technical personnel in the field better understand the scheme of the thermal management control to the fuel cell in the embodiment, a specific example is illustrated below.
For example, in one aspect, the current starting temperature T of the fuel cell may be recorded0And the fuel cell temperature T after N secondsnCalculating the temperature difference K of the fuel battery in N seconds as Tn-T0N may be the appropriate time obtained by calibration of the fuel cell. On the other hand, the required output power P for the fuel cell can be obtainedrguestAnd an upper limit output power P of the fuel cellmax。
Then, a candidate output power P of the fuel cell is determined based on the temperature change value and the required output powerselected＝Prguest-MK。
Finally, the candidate output power P of the fuel cell is comparedselectedUpper limit output power P of fuel cellmaxThe smaller value of the two is output as the new upper limit output power PmaxSending the upper limit output power P to the fuel cell controller to make the fuel cell execute the commandmaxIs changed into Pmax＝PmaxOr Pmax＝Pselected。
After determining the new upper limit output power P of the fuel cellmaxAnd then restarting the next process of carrying out thermal management control on the fuel cell, and continuously carrying out reciprocating circulation on the upper limit output power PmaxAnd adjusting to enable the fuel cell to work in a proper temperature range all the time until the temperature of the cell is smaller than the temperature early warning value.
In order to make the present application better understood by those skilled in the art, the following description will be made with reference to fig. 2.
Referring to fig. 2, an overall flowchart of a fuel cell thermal management control method according to an embodiment of the present application is shown. Specifically, the method comprises steps 201 to 220:
step 201, start.
Step 202, judging whether T (the battery temperature of the fuel battery) is more than or equal to Twarning(temperature warning value)? If not, go to step 203, and if yes, go to step 204.
In step 203, the thermal management intervention program is not initiated.
And step 204, starting the thermal management intervention program.
In step 205, it is determined whether a (current thermostat opening degree) is amax(maximum thermostat opening degree)? If not, go to step 206, and if yes, go to step 207.
In step 206, the thermostat opening is increased to a maximum value.
Step 207, determine if T is greater than TwarningIs it a question of If not, go to step 208, and if so, go to step 209.
And step 208, not directly performing thermal management control on the fuel cell.
Step 209 determines whether RP (current cooling water pump rotation speed) is equal to RPmax(maximum value of rotation speed of cooling water pump)? If not, go to step 210, and if yes, go to step 211.
And step 210, increasing the rotating speed of the cooling water pump to the maximum value.
Step 211, determine if T is greater than TwarningIs there a If not, go to step 208, and if so, go to step 212.
At step 212, it is determined whether the current cooling fan speed is equal to RFmax(maximum cooling fan speed)? If not, go to step 213, and if so, go to step 214.
In step 213, the cooling fan speed is increased to a maximum value.
Step 214, determine if T ≧ Twarning? If not, go to step 208, and if so, go to step 215.
Step 215, directly performing thermal management control on the fuel cell.
Step 216, calculating the difference K ═ T between the fuel cell temperature and the initial temperature after the set timeN-T0。
Step 217, calculate FuelCandidate output power P of batteryselected＝Prequest(required output power) -MK.
Step 218, determine if Pselected≤Pmax(current upper limit output power)? If not, go to step 220, and if yes, go to step 219.
Step 219, set new upper limit output power Pmax＝Pselected。
Step 220, setting a new upper limit output power Pmax＝Pmax。
In summary, the fuel cell thermal management control scheme provided by the application comprehensively considers the current heat dissipation capacity of the cooling system and the heat dissipation requirement of the current output power of the fuel cell, that is, after a high-power fuel cell passenger vehicle runs under a large load for a long time, the temperature of the fuel cell approaches the upper limit of the operating temperature of the fuel cell, and when the heat dissipation capacity of the cooling system is reduced after the fuel cell vehicle runs for a long time and the cooling system of the fuel cell vehicle reaches the maximum load or has an abnormal fault, the output power of the fuel cell is actively interfered, that is, the output power of the fuel cell is reasonably interfered and controlled according to the temperature rise rate of the fuel cell, so that the temperature of the fuel cell is always kept in a reasonable range, and the fuel cell can reduce the maximum allowable output power to continue running, thereby avoiding the emergency shutdown of the fuel cell due to the temperature exceeding the upper limit.
Embodiments of the apparatus of the present application are described below that may be used to implement the fuel cell thermal management control methods of the above-described embodiments of the present application. For details that are not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the thermal management control method of the fuel cell described above in the present application.
Fig. 3 is a block diagram illustrating a fuel cell thermal management control apparatus according to an embodiment of the present application.
Referring to fig. 3, a fuel cell thermal management control apparatus 300 according to an embodiment of the present application, the apparatus 300 comprising: an acquisition unit 301, a startup unit 302, and a control unit 303.
The acquiring unit 301 is configured to acquire a cell temperature of a fuel cell in real time and acquire a temperature warning value of the fuel cell, where the temperature warning value is smaller than an upper limit of a temperature at which the fuel cell is allowed to operate; a starting unit 302, configured to start a thermal management intervention program for the fuel cell if the battery temperature is greater than or equal to the temperature warning value; and the control unit 303 is configured to perform thermal management control on the fuel cell based on the thermal management intervention program so as to control the cell temperature of the fuel cell below the temperature warning value.
In this application, a fuel cell thermal management control system is also provided, and please refer to fig. 4, which is a schematic diagram of a fuel cell thermal management control system according to an embodiment of the present application.
As shown in fig. 4, a fuel cell thermal management control system 400 includes a signal acquisition device 401, a fuel cell thermal management control device 402, and a signal output device 403.
The signal acquiring device 401 is configured to acquire status signals of the fuel cell and the cooling system of the fuel cell in real time, and specifically, the status signals of the fuel cell and the cooling system of the fuel cell may include, but are not limited to, a current output power of the fuel cell, an upper limit output power of the fuel cell, a required output power of the vehicle for the fuel cell, a current temperature of the fuel cell, an upper limit temperature at which the fuel cell is allowed to operate, a current thermostat opening of a thermostat of the cooling system, a maximum thermostat opening of the cooling system, a current cooling water pump rotation speed of the cooling system, a maximum cooling water pump rotation speed of the cooling system, a current cooling fan rotation speed of the cooling system, a maximum cooling fan rotation speed of the cooling system, and the like.
The fuel cell thermal management control device 402 is configured to perform calculation analysis on the data acquired in real time by the signal acquisition device 401 according to a specific processing logic, and determine whether to start a thermal management intervention program, in the fuel cell thermal management control device 402, determine whether to start the thermal management intervention program and determine whether to intervene on the output power of the fuel cell by analyzing state signals of the fuel cell and the cooling system, and if it is necessary to intervene on the output power of the fuel cell, determine an intervention amount for the upper limit output power of the fuel cell according to a change rate of the operating temperature of the fuel cell.
The signal output device 403 is configured to send the control logic of the cooling system and the fuel cell analyzed by the fuel cell thermal management control device 402 to the respective system control units, so that the cooling system and the fuel cell accurately execute the control logic output by the fuel cell thermal management control device 402, so that the temperature of the fuel cell is always kept within a reasonable range.
As another aspect, the present application also provides a computer-readable storage medium having stored thereon a program product capable of implementing the above-described bolt pretensioning loading method of the present specification. In some possible embodiments, various aspects of the present application may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the present application described in the "exemplary methods" section above of this specification, when the program product is run on the terminal device.
Referring to fig. 5, a program product 500 for implementing the above method according to an embodiment of the present application is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, 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 portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
As another aspect, the present application further provides an electronic device capable of implementing the above method.
As will be appreciated by one skilled in the art, aspects of the present application may be embodied as a system, method or program product. Accordingly, various aspects of the present application may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 600 according to this embodiment of the present application is described below with reference to fig. 6. The electronic device 600 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As shown in fig. 6, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: the at least one processing unit 610, the at least one memory unit 620, and a bus 630 that couples various system components including the memory unit 620 and the processing unit 610.
Wherein the storage unit stores program code that can be executed by the processing unit 610, such that the processing unit 610 performs the steps according to various exemplary embodiments of the present application described in the section "example methods" above in this specification.
The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)621 and/or a cache memory unit 622, and may further include a read only memory unit (ROM) 623.
The storage unit 620 may also include a program/utility 624 having a set (at least one) of program modules 625, such program modules 625 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
Bus 630 may be one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
The electronic device 600 may also communicate with one or more external devices 1200 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. As shown, the network adapter 660 communicates with the other modules of the electronic device 600 over the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to make a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) execute the method according to the embodiments of the present application.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the present application, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A fuel cell thermal management control method, characterized in that the method comprises:
acquiring the temperature of a fuel cell in real time, and acquiring a temperature early warning value of the fuel cell, wherein the temperature early warning value is smaller than an upper limit value of the temperature allowing the fuel cell to operate;
if the battery temperature is greater than or equal to the temperature early warning value, starting a thermal management intervention program aiming at the fuel battery;
and performing thermal management control on the fuel cell based on the thermal management intervention program so as to control the cell temperature of the fuel cell below the temperature early warning value.
2. The method of claim 1, wherein the thermal management intervention program comprises a first intervention program for a cooling system for physically cooling the fuel cell and a second intervention program for the fuel cell, and wherein the thermal management control of the fuel cell based on the thermal management intervention program comprises:
performing thermal management control on the fuel cell through the cooling system based on the first intervention program;
after the fuel cell is subjected to thermal management control through the cooling system, if the cell temperature is greater than or equal to the temperature early warning value, the fuel cell is subjected to thermal management control based on the second intervention program.
3. The method of claim 2, wherein the cooling system comprises a plurality of cooling devices, and wherein the performing thermal management control of the fuel cell by the cooling system based on the first intervention procedure comprises:
selecting a target cooling device from the plurality of cooling devices, and performing thermal management control on the fuel cell through the target cooling device;
after the thermal management control is performed on the fuel cell through the target cooling device, if the cell temperature is greater than or equal to the temperature warning value, other cooling devices except the target cooling device are sequentially selected from the plurality of cooling devices to perform thermal management control on the fuel cell until all the plurality of cooling devices are selected or the cell temperature is less than the temperature warning value.
4. The method according to claim 3, wherein the performing thermal management control on the fuel cell by the target cooling device includes:
obtaining the current cooling power of the target cooling device and obtaining the upper limit cooling power of the target cooling device;
adjusting the cooling power of the target cooling device to the upper limit cooling power if the current cooling power is less than the upper limit cooling power.
5. The method of claim 3, wherein the cooling device comprises at least a thermostat, a cooling water pump, and a cooling fan.
6. The method of claim 2, wherein said performing thermal management control on said fuel cell based on said second intervention procedure comprises:
acquiring a temperature change value of the fuel cell within a set time, required output power for the fuel cell, and upper limit output power of the fuel cell;
determining candidate output power of the fuel cell according to the temperature change value and the required output power;
selecting a minimum value from the upper limit output power and the candidate output power as a new upper limit output power, and adjusting the power output of the fuel cell according to the new upper limit output power;
and if the battery temperature is greater than or equal to the temperature early warning value, returning to execute the steps of acquiring the temperature change value of the fuel battery within the set time, the required output power of the fuel battery and the upper limit output power of the fuel battery until the battery temperature is less than the temperature early warning value.
7. The method according to claim 6, wherein the determining the candidate output power of the fuel cell based on the temperature change value and the required output power includes: determining the candidate output power of the fuel cell by the following formula:
Pselected＝Prquest-MK
wherein ,PselectedRepresenting a candidate output power of the fuel cell; prquestRepresenting a required output power for the fuel cell; m represents a power intervention coefficient; and K represents the temperature change value of the fuel cell in a set time.
8. A fuel cell thermal management control apparatus, comprising:
the fuel cell system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the cell temperature of a fuel cell in real time and acquiring a temperature early warning value of the fuel cell, and the temperature early warning value is smaller than the upper limit value of the temperature allowing the fuel cell to operate;
a starting unit, configured to start a thermal management intervention program for the fuel cell if the battery temperature is greater than or equal to the temperature warning value;
and the control unit is used for carrying out thermal management control on the fuel cell based on the thermal management intervention program so as to control the cell temperature of the fuel cell below the temperature early warning value.
9. A computer-readable storage medium having stored therein at least one program code, the at least one program code being loaded into and executed by a processor to perform operations executed by a fuel cell thermal management control method according to any one of claims 1 to 7.
10. An electronic device, wherein the computer device comprises one or more processors and one or more memories having at least one program code stored therein, the at least one program code being loaded and executed by the one or more processors to perform operations performed by the fuel cell thermal management control method of any of claims 1 to 7.
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