CN114614051B - Fuel cell thermal management control method and device, medium and electronic equipment - Google Patents

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

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CN114614051B
CN114614051B CN202210166074.7A CN202210166074A CN114614051B CN 114614051 B CN114614051 B CN 114614051B CN 202210166074 A CN202210166074 A CN 202210166074A CN 114614051 B CN114614051 B CN 114614051B
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fuel cell
temperature
thermal management
output power
cooling
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CN114614051A (en
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贺翀
陈明
王子剑
吴星成
杨佳希
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Dongfeng Motor Group Co Ltd
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Dongfeng Motor Group Co Ltd
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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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Health & Medical Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Computing Systems (AREA)
  • Evolutionary Computation (AREA)
  • Fuzzy Systems (AREA)
  • Medical Informatics (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • 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 device, a medium and electronic equipment. The method comprises the following steps: acquiring the battery temperature of a fuel battery in real time, and acquiring a temperature early-warning value of the fuel battery, wherein the temperature early-warning value is smaller than the upper limit value of the temperature allowing the fuel battery to operate; if the battery temperature is greater than or equal to the temperature early warning value, starting a thermal management intervention program for 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 application can keep the temperature of the fuel cell system within a reasonable range all the time so as to avoid the emergency stop of the fuel cell system caused by the temperature exceeding the upper limit.

Description

Fuel cell thermal management control method and device, medium and electronic equipment
Technical Field
The present application relates to the field of fuel cell thermal management control technology, and in particular, to a fuel cell thermal management control method, device, medium, and electronic apparatus.
Background
At present, in the technical field of fuel cell thermal management control, particularly in the technical field of fuel cell thermal management control of new energy vehicles, a heat dissipation capability of a cooling system is mostly improved by a thermal management control method of a fuel cell, and a processing method of the fuel cell at high temperature is simple, namely when the temperature of the fuel cell exceeds an allowable upper limit, the fuel cell sends out a temperature overrun fault and stops, and a direct stop caused by the fuel cell overrun brings poor experience and even potential safety hazard to a user.
Based on this, how to keep the temperature of the fuel cell system within a reasonable range all the time, so as to avoid the emergency stop of the fuel cell system due to the temperature exceeding the upper limit, is a 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 application can keep the temperature of the fuel cell system within a reasonable range all the time so as to avoid the emergency stop of the fuel cell system caused by the temperature exceeding the upper limit.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the 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 battery temperature of a fuel battery in real time, and acquiring a temperature early-warning value of the fuel battery, wherein the temperature early-warning value is smaller than the upper limit value of the temperature allowing the fuel battery to operate; if the battery temperature is greater than or equal to the temperature early warning value, starting a thermal management intervention program for 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 one embodiment of the present application, based on the foregoing, the thermal management intervention program includes a first intervention program for a cooling system for physically cooling the fuel cell and a second intervention program for the fuel cell, and the thermal management control for the fuel cell based on the thermal management intervention program includes: performing thermal management control on the fuel cell by the cooling system based on the first intervention program; after the fuel cell is thermally managed by the cooling system, if the cell temperature is greater than or equal to the temperature early-warning value, the fuel cell is thermally managed based on the second intervention program.
In one embodiment of the present application, based on the foregoing aspect, the cooling system includes a plurality of cooling devices, and the performing thermal management control on 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 by the target cooling device, if the battery temperature is greater than or equal to the temperature early warning value, the thermal management control is performed on the fuel cell by sequentially selecting other cooling devices than the target cooling device among the plurality of cooling devices until the plurality of cooling devices are all selected or the battery temperature is less than the temperature early warning value.
In one embodiment of the present application, based on the foregoing aspect, the performing thermal management control on the fuel cell by the target cooling device includes: acquiring the current cooling power of the target cooling device and acquiring the upper limit cooling power of the target cooling device; and if the current cooling power is smaller than the upper limit cooling power, adjusting the cooling power of the target cooling device to the upper limit cooling power.
In one embodiment of the present application, based on the foregoing, the cooling device includes at least a thermostat, a cooling water pump, and a cooling fan.
In one embodiment of the present application, based on the foregoing aspect, the performing thermal management control on the fuel cell based on the second intervention program includes: acquiring a temperature change value of the fuel cell in a set time, and aiming at the required output power of the fuel cell and the upper limit output power of the fuel cell; determining candidate output power of the fuel cell according to the temperature variation 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 in the set time, the required output power aiming at 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 aspect, the determining the candidate output power of the fuel cell according to the temperature change value and the required output power includes: the candidate output power of the fuel cell is determined by the following formula:
P selected ＝P rquest -MK
wherein ,Pselected Representing a candidate output power of the fuel cell; p (P) rquest Representing a required output power for the fuel cell; m represents a power intervention coefficient; k represents a 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: an acquisition unit configured to acquire a cell temperature of a fuel cell in real time, and acquire a temperature early-warning value of the fuel cell, the temperature early-warning value being smaller than a temperature upper limit value allowing the fuel cell to operate; a starting unit for starting a thermal management intervention procedure for the fuel cell if the battery temperature is greater than or equal to the temperature pre-warning value; and a control unit for performing thermal management control on the fuel cell based on the thermal management intervention program to control the cell temperature of the fuel cell below the temperature early warning value.
According to an aspect of the embodiments of the present application, there is provided a computer-readable storage medium having stored thereon a computer program comprising executable instructions which, when executed by a processor, implement the fuel cell thermal management control method as described in the above embodiments.
According to an aspect of an embodiment of the present application, there is provided an electronic apparatus including: one or more processors; and 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 above embodiments.
In the technical scheme of the embodiment of the application, when the temperature of the fuel cell approaches the upper limit, the active intervention is performed by starting the thermal management intervention program for the fuel cell, so that the thermal management control for the fuel cell is triggered, the temperature of the fuel cell system can be always kept within a reasonable range, and the emergency stop of the fuel cell system caused by the temperature exceeding 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 as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
fig. 1 is a flowchart showing 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 of 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 according to an embodiment of the application;
fig. 6 is a schematic diagram showing 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. However, the exemplary embodiments may be embodied in many 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 the 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 application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they 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 order of actual execution may be changed according to actual situations.
It should be noted that: references herein to "a plurality" means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in other sequences than those illustrated or otherwise described.
The implementation details of the technical scheme of the embodiment of the application are described in detail below:
firstly, it should be noted that the thermal management control scheme of the fuel cell provided in the present application may be applied to the related technical field of the new energy vehicle, for example, for the new energy vehicle, the power of the new energy vehicle is mainly derived from the fuel cell, and a large amount of heat generated by the fuel cell during the discharging process may raise the temperature of the fuel cell, which affects the performance and safety of the fuel cell, so it is important to perform thermal management control on the fuel cell.
According to an aspect of the present application, there is provided a fuel cell thermal management control method, fig. 1 is a flowchart of a fuel cell thermal management control method according to an embodiment of the present application, which may be performed by an apparatus having a calculation processing function, and the fuel cell thermal management control method includes at least steps 110 to 150, and is described in detail as follows:
in step 110, a cell temperature of the fuel cell is obtained in real time, and a temperature early-warning value of the fuel cell is obtained, wherein the temperature early-warning value is smaller than an upper temperature limit value allowing the fuel cell to operate.
In the application, the cell temperature of the fuel cell can be acquired by the information acquisition device, and the temperature early-warning value of the fuel cell can be determined by a calibration mode.
It is emphasized that the temperature early-warning value needs to be smaller than the upper temperature limit value that allows the operation of the fuel cell. For example, the upper limit of the temperature that allows the fuel cell to operate is 70 ℃, and then the temperature early warning value can be determined to be 65 ℃ in a calibrated manner.
With continued reference to FIG. 1, in step 130, if the cell temperature is greater than or equal to the temperature pre-warning value, a thermal management intervention procedure is initiated for the fuel cell.
In the present application, the thermal management intervention program may be a program that performs a thermal management strategy for the fuel cell, i.e. the thermal management strategy and thermal management logic for the fuel cell of the present application are embodied in a computer by the thermal management intervention program.
The triggering condition for starting the thermal management intervention program for the fuel cell is that the temperature of the battery is greater than or equal to the temperature early warning value, namely when the temperature of the battery acquired in real time is detected to be greater than or equal to the temperature early warning value, the thermal management intervention program for the fuel cell is triggered and started. For example, when the temperature early-warning value is 65 ℃, if the temperature of the battery collected in real time is 65.5 ℃, triggering to start a thermal management intervention program for the fuel cell.
With continued reference to FIG. 1, in step 150, thermal management control is performed on the fuel cell based on the thermal management intervention program 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 the present application, the cooling system may physically cool the fuel cell, and in particular, the cooling system may include a plurality of cooling devices, and in particular, the cooling devices may include one or more of a thermostat, a cooling water pump, a cooling fan, and the like.
In one 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:
step 151, performing thermal management control on the fuel cell through the cooling system based on the first intervention program.
Step 152, after performing thermal management control on the fuel cell by the cooling system, performing thermal management control on the fuel cell based on the second intervention program if the battery temperature is greater than or equal to the temperature pre-warning value.
In the application, when the temperature of the battery acquired in real time is detected to be greater than or equal to a temperature early warning value, firstly, the fuel cell is subjected to thermal management control based on a cooling system, and if the temperature of the battery is still greater than or equal to the temperature early warning value after the fuel cell is subjected to thermal management control based on the cooling system, the fuel cell is directly subjected to thermal management control based on the second intervention program. It will be appreciated that if the cell temperature is less than the temperature warning value, there is no need to directly thermally manage the fuel cell.
In one embodiment of the present application, the thermal management control of the fuel cell by the cooling system based on the first intervention program may be performed according to the following steps 1511 to 1512:
step 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.
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 pre-warning value, selecting another cooling device other than the target cooling device from the plurality of cooling devices in turn to perform the thermal management control on the fuel cell until the plurality of cooling devices are all selected or the battery temperature is less than the temperature pre-warning value, step 1512.
Specifically, in the present 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, obtaining a current cooling power of the target cooling device, and obtaining an 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 for those skilled in the art to better understand the present embodiment, a specific example will be described below.
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 value of the thermostat opening (i.e., upper limit cooling power) of the thermostat, determine whether the thermostat opening reaches the maximum value, and if the thermostat opening does not reach the maximum value, increase the thermostat opening until the maximum opening is reached.
It should be noted that the thermostat is a component similar to a three-way valve with controllable flow. When the cooling requirement is small, the cooling liquid passes through one loop without passing through the radiator, and when the cooling requirement is large, the cooling liquid passes through the other loop without passing through the radiator.
After the opening 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 smaller than the temperature early-warning value, directly performing thermal management control on the fuel cell is not needed.
If the temperature of the battery is greater 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 value (namely the upper limit cooling power) of the rotating speed of the cooling water pump are obtained, whether the rotating speed of the cooling water pump reaches the maximum value 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 maximum rotating speed is reached.
After the rotation speed of the cooling water pump 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 smaller than the temperature early-warning value, directly performing thermal management control on the fuel battery is not needed.
If the battery temperature is still greater 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 value (namely the upper limit cooling power) of the rotating speed of the cooling fan are obtained, whether the rotating speed of the cooling fan reaches the maximum value 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 maximum rotating speed is reached.
After the rotation 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 smaller than the temperature early-warning value, directly performing thermal management control on the fuel cell is not needed.
If the temperature of the battery is still greater than or equal to the temperature early warning value, the fuel battery needs to be directly subjected to thermal management control.
It should be noted that the above sequence of performing thermal management control on the fuel cell by 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 by other cooling devices in sequence, for example, thermal management control is performed on the fuel cell by the cooling fan first, thermal management control is performed on the fuel cell by the cooling water pump, and thermal management control is performed on the fuel cell by the thermostat, which is not limited in the present application.
In one embodiment of the present application, the performing thermal management control on the fuel cell based on the second intervention procedure may be performed according to steps 1521 to 1524 as follows:
step 1521, obtaining a temperature variation value of the fuel cell in a set time, a required output power for the fuel cell, and an upper limit output power of the fuel cell.
Step 1522, determining a candidate output power of the fuel cell according to the temperature variation value and the required output power.
Step 1523, 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.
Step 1524, if the battery temperature is greater than or equal to the temperature pre-warning value, returning to execute the step of acquiring the temperature variation value of the fuel cell in the set time, the required output power of the fuel cell, and the upper limit output power of the fuel cell until the battery temperature is less than the temperature pre-warning value.
In this embodiment, the determining the candidate output power of the fuel cell according to the temperature variation value and the required output power includes: the candidate output power of the fuel cell is determined by the following formula:
P selected ＝P rquest -MK
wherein ,Pselected Representing a candidate output power of the fuel cell; p (P) rquest Representing a required output power for the fuel cell; m represents a power intervention coefficient, wherein M can be a fixed value or a variable obtained through calibration; k represents a temperature change value of the fuel cell in a set time, wherein K can be a positive value or a negative value, and when K is a positive value, the temperature of the fuel cell in the set time is indicated to be increased, and when K is a negative value, the temperature of the fuel cell in the set time is indicated to be decreased.
In order to better understand the scheme of the thermal management control of the fuel cell in this embodiment, a specific example will be described below.
For example, on the one hand, it is possible to record the current starting temperature T of the fuel cell 0 And fuel cell temperature T after N seconds n The fuel cell temperature difference k=t was calculated for N seconds n -T 0 N may be the time taken by fuel cell calibration. On the other hand, the required output power P for the fuel cell can be obtained rguest And an upper limit output power P of the fuel cell max 。
Then according to the resultDetermining a candidate output power P of the fuel cell by the temperature change value and the required output power selected ＝P rguest -MK。
Finally, the candidate output power P of the fuel cell is compared selected Upper limit output power P of fuel cell max Outputting the smaller value of the two as a new upper limit output power P max To the fuel cell controller to make the fuel cell execute the command and output the upper limit power P max Becomes P max ＝P max or Pmax ＝P selected 。
In determining a new upper limit output P of a fuel cell max After that, the next process of thermal management control of the fuel cell is restarted, and the upper limit output power P is continuously controlled by the reciprocating cycle max And (3) adjusting to ensure that the fuel cell always works in a proper temperature range until the temperature of the fuel cell is smaller than the temperature early warning value.
In order to better understand the present application by those skilled in the art, the following description will be given 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 the steps 201 to 220:
step 201, start.
Step 202, judging whether T (cell temperature of fuel cell) is not less than T warning (temperature pre-warning value)? If not, go to step 203, if yes, go to step 204.
In step 203, the thermal management intervention is not initiated.
At step 204, a thermal management intervention program is initiated.
Step 205, determine whether a (current thermostat opening) =a max (maximum opening of thermostat)? If not, go to step 206, if yes, go to step 207.
Step 206, increasing the opening of the thermostat to a maximum value.
Step 207, determining whether T is greater than or equal to T warning ? If not, go to step 208, if yes, go to step 209.
Step 208, thermal management control is not directly performed on the fuel cell.
Step 209, determining whether RP (current cooling water pump rotation speed) =rp max (maximum cooling water pump rotation speed)? If not, go to step 210, if yes, go to step 211.
Step 210, increasing the rotation speed of the cooling water pump to a maximum value.
Step 211, judging whether T is more than or equal to T warning ? If not, go to step 208, if yes, go to step 212.
Step 212, determine whether RF (current cooling fan rotation speed) =rf max (maximum cooling fan speed)? If not, go to step 213, if yes, go to step 214.
Step 213, increasing the cooling fan speed to a maximum value.
Step 214, determining whether T is greater than or equal to T warnin g? If not, go to step 208, if yes, 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 time N -T 0 。
Step 217, calculating a candidate output power P of the fuel cell selected ＝P request (required output power) -MK.
Step 218, determine if P selected ≤P max (current upper limit output power)? If not, go to step 220, if yes, go to step 219.
Step 219, setting a new upper limit output power P max ＝P selected 。
Step 220, setting new upper limit output power P max ＝P max 。
In summary, the heat management control scheme of the fuel cell provided by the application comprehensively considers the current heat dissipation capability of the cooling system and the heat dissipation requirement of the current output power of the fuel cell, namely, after the high-power fuel cell passenger car runs for a long time under a large load, the temperature of the fuel cell approaches the upper limit of the working temperature of the fuel cell, and the fuel cell car actively intervenes the output power of the fuel cell under the conditions that the heat dissipation capability of the cooling system is reduced after the long-term running and the cooling system of the fuel cell car reaches the maximum load or abnormal faults, namely, reasonably intervenes and controls the output power of the fuel cell according to the temperature rising rate of the fuel cell, so that the temperature of the fuel cell is always kept within a reasonable range, and the maximum allowable output power of the fuel cell can be reduced to continue running, thereby avoiding the emergency shutdown of the fuel cell due to the fact that the temperature exceeds the upper limit.
The following describes embodiments of the apparatus of the present application that can be used to perform the fuel cell thermal management control method in the above-described embodiments of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the fuel cell thermal management control method of the present application.
Fig. 3 is a block diagram showing 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 includes: an acquisition unit 301, a start unit 302, and a control unit 303.
The acquiring unit 301 is configured to acquire a battery temperature of the fuel battery in real time, and acquire a temperature early-warning value of the fuel battery, where the temperature early-warning value is less than a temperature upper limit value that allows the fuel battery to operate; a starting unit 302 for starting a thermal management intervention procedure for the fuel cell if the battery temperature is greater than or equal to the temperature pre-warning value; and a control unit 303 for performing thermal management control on the fuel cell based on the thermal management intervention program to control the cell temperature of the fuel cell below the temperature early-warning value.
In the present application, a thermal management control system for a fuel cell is also provided, and please refer to fig. 4, which is a schematic diagram of a thermal management control system for a fuel cell 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 acquisition device 401 is configured to acquire status signals of the fuel cell and the fuel cell cooling system in real time, and specifically, the status signals of the fuel cell and the fuel cell cooling system 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 whole vehicle to the fuel cell, a current temperature of the fuel cell, a temperature upper limit value allowing the fuel cell to operate, a current thermostat opening of a thermostat of the cooling system, a maximum opening of the thermostat of the cooling system, a current cooling water pump rotation speed of the cooling system, a maximum value of a cooling water pump rotation speed of the cooling system, a current cooling fan rotation speed of the cooling system, a maximum value of a cooling fan rotation speed of the cooling system, and the like.
The fuel cell thermal management control device 402 is configured to perform calculation and analysis on data acquired in real time by the signal acquisition device 401 according to specific processing logic, and determine whether to start a thermal management intervention program, where in the fuel cell thermal management control device 402, by analyzing status signals of a fuel cell and a cooling system, it is determined whether to start the thermal management intervention program, and determine whether to intervene in the output power of the fuel cell, and if the output power of the fuel cell needs to be intervened, 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 cooling system and the control logic of the fuel cell obtained by analysis 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 method for loading bolt pretension described in the present specification. In some possible embodiments, the various aspects of the application may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the application as described in the "exemplary methods" section of this specification, when said program product is run on the terminal device.
Referring to fig. 5, a program product 500 for implementing the above-described 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. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. 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, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, 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., connected via the Internet using an Internet service provider).
On the other hand, the application also provides electronic equipment capable of realizing the method.
Those skilled in the art will appreciate that the various aspects of the application may be implemented as a system, method, or program product. Accordingly, aspects of the application may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.
An electronic device 600 according to this embodiment of the application is described below with reference to fig. 6. The electronic device 600 shown in fig. 6 is merely an example, and should not be construed as limiting the functionality and scope of use of embodiments of the present application.
As shown in fig. 6, the electronic device 600 is in the form of a general purpose computing device. Components of 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 connects the various system components, including the memory unit 620 and the processing unit 610.
Wherein the storage unit stores program code that is executable by the processing unit 610 such that the processing unit 610 performs steps according to various exemplary embodiments of the present application described in the above-described "example methods" section of the present specification.
The storage unit 620 may include readable media in the form of volatile storage units, such as Random Access Memory (RAM) 621 and/or cache memory 622, and may further include Read Only Memory (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 or some combination of which may include an implementation of a network environment.
Bus 630 may be a local bus representing 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 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.), one or more devices that enable a user to interact with the electronic device 600, and/or any devices (e.g., routers, modems, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 650. Also, electronic device 600 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 660. As shown, network adapter 660 communicates with other modules of electronic device 600 over bus 630. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 600, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present application.
Furthermore, the above-described drawings are only schematic illustrations of processes included in the method according to the exemplary embodiment of the present application, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (8)

1. A fuel cell thermal management control method, characterized by comprising:
acquiring the battery temperature of a fuel battery in real time, and acquiring a temperature early-warning value of the fuel battery, wherein the temperature early-warning value is smaller than the upper limit value of the temperature allowing the fuel battery to operate;
if the battery temperature is greater than or equal to the temperature early warning value, starting a thermal management intervention program for the fuel battery; the thermal management intervention program comprises a first intervention program for a cooling system and a second intervention program for the fuel cell, wherein the cooling system is used for physically cooling the fuel cell;
performing thermal management control on the fuel cell based on the thermal management intervention program to control a cell temperature of the fuel cell below the temperature early warning value;
the performing thermal management control on the fuel cell based on the thermal management intervention program includes:
performing thermal management control on the fuel cell by the cooling system based on the first intervention program;
after the fuel cell is thermally managed by the cooling system, if the cell temperature is greater than or equal to the temperature pre-warning value, thermally managing the fuel cell based on the second intervention program;
the performing thermal management control on the fuel cell based on the second intervention program includes:
acquiring a temperature change value of the fuel cell in a set time, and aiming at the required output power of the fuel cell and the upper limit output power of the fuel cell;
determining candidate output power of the fuel cell according to the temperature variation 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 in the set time, the required output power aiming at 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.
2. The method of claim 1, wherein the cooling system includes a plurality of cooling devices, the thermally managing the fuel cell by the cooling system based on the first intervention procedure comprising:
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 by the target cooling device, if the battery temperature is greater than or equal to the temperature early warning value, the thermal management control is performed on the fuel cell by sequentially selecting other cooling devices than the target cooling device among the plurality of cooling devices until the plurality of cooling devices are all selected or the battery temperature is less than the temperature early warning value.
3. The method of claim 2, wherein the thermally managing the fuel cell by the target cooling device comprises:
acquiring the current cooling power of the target cooling device and acquiring the upper limit cooling power of the target cooling device;
and if the current cooling power is smaller than the upper limit cooling power, adjusting the cooling power of the target cooling device to the upper limit cooling power.
4. The method of claim 2, wherein the cooling device comprises at least a thermostat, a cooling water pump, and a cooling fan.
5. The method of claim 1, wherein said determining a candidate output power of said fuel cell based on said temperature change value and said demanded output power comprises: the candidate output power of the fuel cell is determined by the following formula:
wherein ,representing candidate output power of said fuel cell; ->Represents the required output power for the fuel cell;>representing the power intervention coefficient;>indicating a temperature change value of the fuel cell over a set time.
6. A fuel cell thermal management control apparatus, characterized by comprising:
an acquisition unit configured to acquire a cell temperature of a fuel cell in real time, and acquire a temperature early-warning value of the fuel cell, the temperature early-warning value being smaller than a temperature upper limit value allowing the fuel cell to operate;
a starting unit for starting a thermal management intervention procedure for the fuel cell if the battery temperature is greater than or equal to the temperature pre-warning value; the thermal management intervention program comprises a first intervention program for a cooling system and a second intervention program for the fuel cell, wherein the cooling system is used for physically cooling the fuel cell;
a control unit for performing thermal management control on the fuel cell based on the thermal management intervention program to control a cell temperature of the fuel cell below the temperature early-warning value;
the performing thermal management control on the fuel cell based on the thermal management intervention program includes:
performing thermal management control on the fuel cell by the cooling system based on the first intervention program;
after the fuel cell is thermally managed by the cooling system, if the cell temperature is greater than or equal to the temperature pre-warning value, thermally managing the fuel cell based on the second intervention program;
the performing thermal management control on the fuel cell based on the second intervention program includes:
acquiring a temperature change value of the fuel cell in a set time, and aiming at the required output power of the fuel cell and the upper limit output power of the fuel cell;
determining candidate output power of the fuel cell according to the temperature variation 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 in the set time, the required output power aiming at 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. A computer-readable storage medium having stored therein at least one program code loaded and executed by a processor to implement the operations performed by the fuel cell thermal management control method of any one of claims 1 to 5.
8. An electronic device comprising one or more processors and one or more memories, the one or more memories having stored therein at least one program code loaded and executed by the one or more processors to implement the operations performed by the fuel cell thermal management control method of any of claims 1-5.
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