CN117476980A - Thermal management method, system, terminal and storage medium for fuel cell stack - Google Patents
Thermal management method, system, terminal and storage medium for fuel cell stack Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 80
- 238000007726 management method Methods 0.000 title description 45
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000033228 biological regulation Effects 0.000 claims description 71
- 230000001105 regulatory effect Effects 0.000 claims description 49
- 238000001816 cooling Methods 0.000 claims description 29
- 238000004590 computer program Methods 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000002222 downregulating effect Effects 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000003828 downregulation Effects 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 230000002528 anti-freeze Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
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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
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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
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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
- H01M8/04992—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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Abstract
The present disclosure relates to the field of fuel cell technologies, and in particular, to a method, a system, a terminal, and a storage medium for thermal management of a fuel cell stack, where the method includes: judging whether an inner circulation loop and an outer circulation loop are detected; if so, judging whether the inner circulation loop and the outer circulation loop meet the corresponding preset loop requirements or not respectively; if the current temperature of the fuel cell stack meets the corresponding preset loop requirements, acquiring the current temperature of the fuel cell stack; judging whether the current temperature exceeds a preset first temperature threshold value or not; if the current temperature exceeds a preset first temperature threshold, the current temperature is adjusted downwards based on the preset first temperature threshold; if the current temperature does not exceed the preset first temperature threshold, judging whether the current temperature exceeds a preset second temperature threshold; and if the current temperature does not exceed the preset second temperature threshold, the current temperature is adjusted upwards based on the preset second temperature threshold. The present application facilitates accurate control of the temperature of a fuel cell stack.
Description
Technical Field
The present disclosure relates to the field of fuel cell technologies, and in particular, to a method, a system, a terminal, and a storage medium for thermal management of a fuel cell stack.
Background
The fuel cell is an electrochemical power generation device, directly converts chemical energy into electric energy, is not limited by Carnot circulation, has high energy conversion efficiency, is pollution-free and noise-free, is becoming an ideal energy utilization mode of a new generation, and has wide development prospect along with the gradual maturity of fuel cell technology.
The key component of the fuel cell stack system is a cell stack, the cell stack needs to exert the highest efficiency in a specific temperature range, and too low or too high temperature of the cell stack not only can reduce the working efficiency of the cell stack, but also can cause permanent damage to the cell stack, and the working temperature in the cell stack is accurately controlled, so that the accuracy of the temperature control of the fuel cell stack system is critical to the efficiency and the service life of the fuel cell stack system, so that the problem to be solved is urgent.
Disclosure of Invention
To facilitate accurate control of the temperature of a fuel cell stack, the present application provides a method, system, terminal, and storage medium for thermal management of a fuel cell stack.
In a first aspect, the present application provides a method for thermal management of a fuel cell stack, which adopts the following technical scheme:
a method of thermal management of a fuel cell stack, comprising:
Judging whether an inner circulation loop and an outer circulation loop are detected;
if the inner circulation loop and the outer circulation loop are detected, judging whether the inner circulation loop and the outer circulation loop meet corresponding preset loop requirements or not respectively;
if the internal circulation loop and the external circulation loop meet the corresponding preset loop requirements, acquiring the current temperature of the fuel cell stack;
judging whether the current temperature exceeds a preset first temperature threshold value or not;
if the current temperature exceeds the preset first temperature threshold value, the current temperature is adjusted downwards based on the preset first temperature threshold value;
if the current temperature does not exceed the preset first temperature threshold, judging whether the current temperature exceeds a preset second temperature threshold;
and if the current temperature does not exceed the preset second temperature threshold, up-regulating the current temperature based on the preset second temperature threshold.
By adopting the technical scheme, whether the internal circulation loop and the external circulation loop are detected is judged, if so, the device for carrying out heat management on the fuel cell stack is complete, so that whether the internal circulation loop and the external circulation loop respectively meet the corresponding preset loop requirements is further judged, if so, the internal circulation loop and the external circulation loop respectively meet the corresponding preset loop requirements, the heat management can be carried out on the fuel cell stack, so that the current temperature of the fuel cell stack is obtained, whether the current temperature exceeds a preset first temperature threshold value is judged, if so, the current temperature is excessively high, and therefore, the current temperature needs to be adjusted downwards according to the preset first temperature threshold value; if the current temperature is not exceeded, whether the current temperature exceeds a preset second temperature threshold value is further judged, if the current temperature is not exceeded, the current temperature is indicated to be too low, and therefore the current temperature needs to be up-regulated according to the preset second temperature threshold value;
When the devices for carrying out heat management on the fuel cell stack are complete and respectively meet the corresponding preset loop requirements, carrying out heat management on the fuel cell stack, and selecting a corresponding heat management method according to the magnitude relation between the preset first temperature threshold value and the preset second temperature threshold value of the current temperature, so as to accurately control the temperature of the fuel cell stack to be in a normal temperature range.
Optionally, if the current temperature exceeds the preset first temperature threshold, the specific step of adjusting the current temperature down based on the preset first temperature threshold includes:
if the current temperature exceeds the preset first temperature threshold, judging whether a historical temperature regulation record exists or not;
if the historical temperature regulation record exists, judging whether the historical temperature corresponding to the current temperature exists in the historical temperature regulation record or not;
and if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record, the current temperature is adjusted downwards based on the historical temperature adjustment record and the historical temperature.
By adopting the technical scheme, whether the historical temperature regulation record exists is judged, if so, the regulation record of the temperature of the battery stack exists, whether the historical temperature corresponding to the current temperature exists in the historical temperature regulation record is further judged, and if so, the historical temperature with the temperature value consistent with or very similar to the current temperature at a certain time node in the past is indicated to be subjected to temperature regulation, so that a temperature regulation scheme does not need to be additionally generated for the current temperature, the current temperature is directly regulated according to the temperature regulation scheme in the historical temperature regulation record, the regulation time is saved, the current temperature is regulated more quickly, and the stability and the accuracy of the temperature control of the battery stack are improved.
Optionally, if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record, the specific step of performing the down-adjustment on the current temperature based on the historical temperature adjustment record and the historical temperature includes:
if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record, acquiring a target temperature adjustment degree based on the historical temperature adjustment record;
based on the historical attemperation record, taking the historical temperature corresponding to the target attemperation degree as a target temperature;
judging whether the current temperature is matched with the target temperature or not;
if the current temperature is matched with the target temperature, the current temperature is adjusted downwards based on the historical temperature adjustment record and the historical temperature;
if the current temperature is not matched with the target temperature, acquiring an abnormal factor affecting the current temperature;
and down-regulating the current temperature based on the abnormality factor, the historical temperature regulation record and the historical temperature.
By adopting the technical scheme, the target temperature adjustment degree is obtained according to the historical temperature adjustment record, then the target temperature corresponding to the target temperature adjustment degree is obtained, whether the current temperature is matched with the target temperature or not is judged, if the current temperature is matched with the target temperature, the change condition of the battery stack is consistent with the change condition in the historical temperature adjustment record, and therefore the current temperature can be adjusted and controlled in a downward mode directly according to the temperature adjustment scheme in the historical temperature adjustment record; if the current temperature is not matched with the current temperature, the change condition of the battery stack is inconsistent with the change condition in the historical temperature regulation record, and an abnormal factor affecting the current temperature is inevitably present, so that the current temperature is regulated down according to the abnormal factor, the historical temperature regulation record and the historical temperature, the current temperature is regulated more quickly, the stability and the accuracy of the temperature control of the battery stack are improved, the current temperature is regulated down by combining the abnormal factor, and the temperature of the fuel battery stack is more accurately controlled.
Optionally, after determining whether the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record if the historical temperature adjustment record exists, the method further includes:
if the historical temperature corresponding to the current temperature does not exist in the historical temperature regulating record, acquiring the current flow of the internal circulation loop;
acquiring a flow temperature adjustment relationship based on the historical temperature adjustment record;
and based on the preset first temperature threshold, the current flow and the flow temperature regulation relationship, the current temperature is regulated downwards.
By adopting the technical scheme, if the historical temperature corresponding to the current temperature does not exist in the historical temperature regulation record, the fact that the historical temperature which is consistent with or very similar to the current temperature is not subjected to temperature regulation in the historical temperature regulation record is indicated, and the current temperature cannot be subjected to down regulation by adopting the temperature regulation scheme which is generated in the historical temperature regulation record, so that the current flow and the flow temperature regulation relation of the internal circulation loop are required to be acquired, and the current temperature is subjected to down regulation according to the preset first temperature threshold value, the current flow and the flow temperature regulation relation; when the historical temperature corresponding to the current temperature does not exist, the current temperature is regulated and controlled in real time according to the flow temperature regulation relation in the historical temperature regulation record, so that the temperature of the fuel cell stack can be controlled more accurately.
Optionally, after the step of down-regulating the current temperature based on the preset first temperature threshold if the current temperature exceeds the preset first temperature threshold, the step further includes:
judging whether the current temperature exceeds the preset first temperature threshold again;
if the current temperature still exceeds the preset first temperature threshold value, acquiring the current temperature adjustment degree and the maximum temperature adjustment degree of the internal circulation loop;
judging whether the current temperature adjustment degree is equal to the maximum temperature adjustment degree or not;
and if the current temperature adjustment degree is equal to the maximum temperature adjustment degree, cooling the inner circulation loop based on the outer circulation loop.
By adopting the technical scheme, whether the current temperature exceeds the preset first temperature threshold value is judged again, if the current temperature still exceeds the preset first temperature threshold value, whether the current temperature regulating degree of the inner circulation loop is equal to the maximum temperature regulating degree is judged, if the current temperature regulating degree of the inner circulation loop is equal to the maximum temperature regulating degree, the current temperature regulating degree of the inner circulation loop is indicated to be the maximum temperature regulating degree, the cooling effect cannot be further increased according to the inner circulation loop, and therefore the outer circulation loop needs to be increased to cool the inner circulation loop, and the temperature of the fuel cell stack is accurately controlled through the inner circulation loop.
Optionally, after the determining whether the current temperature adjustment degree is equal to the maximum temperature adjustment degree, the method further includes:
if the current temperature adjustment degree is smaller than the maximum temperature adjustment degree, acquiring a temperature adjustment degree change condition based on the current temperature adjustment degree and the maximum temperature adjustment degree;
taking the current temperature before temperature adjustment as a first temperature, taking the current temperature after temperature adjustment as a second temperature, and acquiring a temperature change condition based on the first temperature and the second temperature;
judging whether the internal circulation loop meets the cooling requirement or not based on the temperature change condition and the temperature adjustment degree change condition;
and if the internal circulation loop meets the cooling requirement, adjusting the current temperature adjustment degree based on the current temperature.
By adopting the technical scheme, if the current temperature regulating degree is smaller than the maximum temperature regulating degree, the current temperature regulating degree of the inner circulation loop does not reach the maximum temperature regulating degree, so that the cooling effect can be further increased according to the inner circulation loop, the temperature regulating degree change condition and the temperature change condition are obtained, whether the inner circulation loop meets the cooling requirement is judged according to the temperature regulating degree change condition and the temperature change condition, if so, the current temperature can be controlled by changing the current temperature regulating degree of the inner circulation loop, and the current temperature regulating degree is regulated according to the current temperature; according to the temperature regulation degree change condition and the temperature change condition, whether the current temperature can be controlled and stabilized only by the internal circulation loop is judged, and the accurate control of the temperature of the battery stack is maintained, so that the energy conservation is facilitated.
Optionally, after the determining whether the internal circulation loop meets the cooling requirement based on the temperature change condition and the temperature adjustment degree change condition, the method further includes:
and if the inner circulation loop does not meet the cooling requirement, cooling the inner circulation loop based on the outer circulation loop, and downwards regulating the current temperature through the inner circulation loop.
By adopting the technical scheme, if the internal circulation loop does not meet the cooling requirement, the safety regulation and control on the current temperature cannot be maintained only by changing the current temperature regulation and control degree of the internal circulation loop, so that the internal circulation loop is required to exchange heat through the external circulation loop while the current temperature is regulated down through the internal circulation loop, and the effect of finally regulating down the current temperature is achieved; the inner circulation loop and the outer circulation loop cooperate with each other, so that the regulation and control range of the current temperature is improved, and after the current temperature exceeds the maximum temperature regulation degree of the inner circulation loop, the temperature of the inner circulation loop is changed through the outer circulation loop, so that the effect of reducing the current temperature is achieved.
In a second aspect, the present application further discloses a thermal management system for a fuel cell stack, which adopts the following technical scheme:
A thermal management system for a fuel cell stack, comprising:
the first judging module is used for judging whether the inner circulation loop and the outer circulation loop are detected or not;
the second judging module is used for judging whether the inner circulation loop and the outer circulation loop meet corresponding preset loop requirements or not respectively if the inner circulation loop and the outer circulation loop are detected;
the acquisition module is used for acquiring the current temperature of the fuel cell stack if the inner circulation loop and the outer circulation loop meet the corresponding preset loop requirements;
the third judging module is used for judging whether the current temperature exceeds a preset first temperature threshold value;
the cooling module is used for carrying out down regulation on the current temperature based on the preset first temperature threshold value if the current temperature exceeds the preset first temperature threshold value;
a fourth judging module, configured to judge whether the current temperature exceeds a preset second temperature threshold if the current temperature does not exceed the preset first temperature threshold;
and the temperature raising module is used for raising the current temperature based on the preset second temperature threshold value if the current temperature does not exceed the preset second temperature threshold value.
By adopting the technical scheme, whether the internal circulation loop and the external circulation loop are detected is judged, if so, the device for carrying out heat management on the fuel cell stack is complete, so that whether the internal circulation loop and the external circulation loop respectively meet the corresponding preset loop requirements is further judged, if so, the internal circulation loop and the external circulation loop respectively meet the corresponding preset loop requirements, the heat management can be carried out on the fuel cell stack, so that the current temperature of the fuel cell stack is obtained, whether the current temperature exceeds a preset first temperature threshold value is judged, if so, the current temperature is excessively high, and therefore, the current temperature needs to be adjusted downwards according to the preset first temperature threshold value; if the current temperature is not exceeded, whether the current temperature exceeds a preset second temperature threshold value is further judged, if the current temperature is not exceeded, the current temperature is indicated to be too low, and therefore the current temperature needs to be up-regulated according to the preset second temperature threshold value;
when the devices for carrying out heat management on the fuel cell stack are complete and respectively meet the corresponding preset loop requirements, carrying out heat management on the fuel cell stack, and selecting a corresponding heat management method according to the magnitude relation between the preset first temperature threshold value and the preset second temperature threshold value of the current temperature, so as to accurately control the temperature of the fuel cell stack to be in a normal temperature range.
In a third aspect, the present application provides a computer apparatus, which adopts the following technical scheme:
an intelligent terminal comprising a memory, a processor, wherein the memory is configured to store a computer program capable of running on the processor, and the processor, when loaded with the computer program, performs the method of the first aspect.
By adopting the technical scheme, the computer program is generated based on the method of the first aspect and is stored in the memory to be loaded and executed by the processor, so that the intelligent terminal is manufactured according to the memory and the processor, and the intelligent terminal is convenient for a user to use.
In a fourth aspect, the present application provides a computer readable storage medium, which adopts the following technical scheme:
a computer readable storage medium having stored therein a computer program which, when loaded by a processor, performs the method of the first aspect.
By adopting the technical scheme, the method based on the first aspect generates the computer program, and stores the computer program in the computer readable storage medium to be loaded and executed by the processor, and the computer program is convenient to read and store through the computer readable storage medium.
In summary, the present application includes the following beneficial technical effects:
judging whether an inner circulation loop and an outer circulation loop are detected, if so, indicating that the devices for carrying out heat management on the fuel cell stack are complete, further judging whether the inner circulation loop and the outer circulation loop respectively meet the corresponding preset loop requirements, if so, indicating that the inner circulation loop and the outer circulation loop both meet the corresponding preset loop requirements, carrying out heat management on the fuel cell stack, thus obtaining the current temperature of the fuel cell stack, judging whether the current temperature exceeds a preset first temperature threshold, and if so, indicating that the current temperature is too high, and therefore, carrying out down regulation on the current temperature according to the preset first temperature threshold; if the current temperature is not exceeded, whether the current temperature exceeds a preset second temperature threshold value is further judged, if the current temperature is not exceeded, the current temperature is indicated to be too low, and therefore the current temperature needs to be up-regulated according to the preset second temperature threshold value;
when the devices for carrying out heat management on the fuel cell stack are complete and respectively meet the corresponding preset loop requirements, carrying out heat management on the fuel cell stack, and selecting a corresponding heat management method according to the magnitude relation between the preset first temperature threshold value and the preset second temperature threshold value of the current temperature, so as to accurately control the temperature of the fuel cell stack to be in a normal temperature range.
Drawings
FIG. 1 is a main flow chart of a method of thermal management of a fuel cell stack according to an embodiment of the present application;
fig. 2 is a step flowchart of steps S201 to S203;
fig. 3 is a step flowchart of steps S301 to S306;
fig. 4 is a step flowchart of steps S401 to S403;
fig. 5 is a step flowchart of steps S501 to S504;
fig. 6 is a step flowchart of steps S601 to S604;
fig. 7 is a step flowchart of step S701 to step S701;
fig. 8 is a block diagram of a thermal management system of a fuel cell stack according to an embodiment of the present application.
Reference numerals illustrate:
1. a first judgment module; 2. a second judging module; 3. an acquisition module; 4. a third judging module; 5. a cooling module; 6. a fourth judgment module; 7. and a temperature rising module.
Detailed Description
In a first aspect, a method of thermal management of a fuel cell stack is disclosed.
Referring to fig. 1, a thermal management method of a fuel cell stack includes steps S101 to S107:
step S101: it is determined whether an inner circulation loop and an outer circulation loop are detected.
Specifically, in this embodiment, the internal circulation loop is a loop connected to the galvanic pile of the object to be tested, and the medium is deionized water or glycol solution; the external circulation loop is a loop connected with the cooling tower, and the medium is ordinary water or antifreeze.
Step S102: if the inner circulation loop and the outer circulation loop are detected, judging whether the inner circulation loop and the outer circulation loop meet the corresponding preset loop requirements or not respectively.
Specifically, the preset loop requirements include an inner loop requirement, i.e., a requirement corresponding to the inner loop, and an outer loop requirement, i.e., a requirement corresponding to the outer loop; in this embodiment, if the medium in the inner circulation loop is deionized water or glycol solution, the inner circulation loop is determined to meet the preset loop requirement, and if the medium in the outer circulation loop is normal water or antifreeze, the outer circulation loop is determined to meet the preset loop requirement.
Step S103: and if the internal circulation loop and the external circulation loop meet the corresponding preset loop requirements, acquiring the current temperature of the fuel cell stack.
Specifically, in this embodiment, the current temperature, that is, the temperature of the current time node of the stack, may be obtained by a temperature sensor.
Step S104: and judging whether the current temperature exceeds a preset first temperature threshold value.
Specifically, in this embodiment, a first temperature threshold, that is, a preset determination criterion for determining whether the current temperature exceeds the safe temperature range, is preset.
Step S105: and if the current temperature exceeds the preset first temperature threshold, the current temperature is adjusted downwards based on the preset first temperature threshold.
Specifically, if the current temperature exceeds the preset first temperature threshold, the current temperature is adjusted downward based on the preset first temperature threshold until the current temperature is smaller than the preset first temperature threshold, that is, the adjustment of the current temperature is stopped.
Step S106: if the current temperature does not exceed the preset first temperature threshold, judging whether the current temperature exceeds the preset second temperature threshold.
Specifically, a second temperature threshold value, namely a preset judgment standard for judging whether the current temperature is lower than a safe temperature range, is preset; in this embodiment, if the current temperature is between the preset first temperature threshold and the preset second temperature threshold, it indicates that the current temperature is within the safe temperature range, and no thermal management is required for the fuel cell stack, otherwise, it indicates that the current temperature is not within the safe temperature range, and no thermal management is required for the fuel cell stack.
Step S107: and if the current temperature does not exceed the preset second temperature threshold, the current temperature is adjusted upwards based on the preset second temperature threshold.
Specifically, if the current temperature exceeds the preset second temperature threshold, the current temperature is adjusted up based on the preset second temperature threshold until the current temperature is greater than the preset second temperature threshold, that is, the adjustment of the current temperature is stopped.
According to the thermal management method for the fuel cell stack, whether the internal circulation loop and the external circulation loop are detected is judged, if so, the device for carrying out thermal management on the fuel cell stack is complete, so that whether the internal circulation loop and the external circulation loop respectively meet the corresponding preset loop requirements is further judged, if so, the internal circulation loop and the external circulation loop respectively meet the corresponding preset loop requirements, the thermal management can be carried out on the fuel cell stack, the current temperature of the fuel cell stack is obtained, whether the current temperature exceeds a preset first temperature threshold value is judged, and if so, the current temperature is excessively high, and therefore, the current temperature needs to be adjusted downwards according to the preset first temperature threshold value; if the current temperature is not exceeded, whether the current temperature exceeds a preset second temperature threshold is further judged, and if the current temperature is not exceeded, the current temperature is indicated to be too low, so that the current temperature needs to be adjusted upwards according to the preset second temperature threshold.
When the devices for carrying out heat management on the fuel cell stack are complete and respectively meet the corresponding preset loop requirements, carrying out heat management on the fuel cell stack, and selecting a corresponding heat management method according to the magnitude relation between the preset first temperature threshold value and the preset second temperature threshold value of the current temperature, so as to accurately control the temperature of the fuel cell stack to be in a normal temperature range.
Referring to fig. 2, in one implementation manner of the present embodiment, if the current temperature exceeds the preset first temperature threshold in step S105, the specific step of performing the down-adjustment on the current temperature based on the preset first temperature threshold includes steps S201 to S203:
step S201: if the current temperature exceeds the preset first temperature threshold, judging whether a historical temperature regulation record exists.
Specifically, the historical temperature adjustment record, that is, all records of temperature adjustment of the battery stack in a certain time threshold, including the adjusted temperature and the adjustment scheme for the adjusted temperature, etc., in this embodiment, the time threshold may be five years.
Step S202: if the historical temperature regulation record exists, judging whether the historical temperature corresponding to the current temperature exists in the historical temperature regulation record.
Specifically, the historical temperature is the temperature corresponding to the current temperature adjusted in the historical temperature adjustment record.
Step S203: and if the historical temperature corresponding to the current temperature exists in the historical temperature adjusting record, the current temperature is adjusted downwards based on the historical temperature adjusting record and the historical temperature.
Specifically, in this embodiment, the current temperature is adjusted by down-adjusting according to the adjustment scheme for the historical temperature in the historical temperature adjustment record.
According to the thermal management method for the fuel cell stack, whether the historical temperature regulation record exists is judged, if so, the regulation record of the temperature of the fuel cell stack exists, whether the historical temperature corresponding to the current temperature exists in the historical temperature regulation record is further judged, and if so, the historical temperature, of which the temperature value at a certain time node in the past is consistent with or very similar to the current temperature, is indicated to be subjected to over-temperature regulation, so that a temperature regulation scheme does not need to be additionally generated for the current temperature, the current temperature is directly regulated according to the temperature regulation scheme in the historical temperature regulation record, the regulation time is saved, the current temperature is regulated more quickly, and the stability and the accuracy of the temperature control of the fuel cell stack are improved.
Referring to fig. 3, in one implementation manner of the present embodiment, if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record in step S203, specific steps of down-adjusting the current temperature based on the historical temperature adjustment record and the historical temperature include steps S301 to S306:
step S301: and if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record, acquiring the target temperature adjustment degree based on the historical temperature adjustment record.
Specifically, the target temperature adjustment degree is the temperature adjustment degree that occurs in the temperature adjustment process for the historical temperature corresponding to the current temperature, and in this embodiment, the target temperature adjustment degree does not include the initial temperature adjustment degree.
Specifically, the temperature adjustment degree, that is, the adjustment capability of adjusting the current temperature, may be represented by [0,1], and in this embodiment, may be determined according to the valve opening of the control internal circulation loop, where the valve is closed, which indicates that the temperature adjustment degree is 0, and the valve is fully opened, which indicates that the temperature adjustment degree is 1.
Step S302: based on the historical temperature adjustment record, the historical temperature corresponding to the target temperature adjustment degree is taken as the target temperature.
Specifically, in this embodiment, the target temperature is a historical temperature corresponding to the target temperature adjustment degree.
Step S303: and judging whether the current temperature is matched with the target temperature.
Specifically, in this embodiment, whether the current temperature matches the target temperature is determined, that is, whether the absolute value of the difference between the current temperature and the target temperature is smaller than a predetermined value, for example, 0.1, if smaller than, the current temperature matches, and if greater than or equal to, the absolute value does not match.
Step S304: and if the current temperature is matched with the target temperature, the current temperature is adjusted downwards based on the historical temperature adjustment record and the historical temperature.
Step S305: if the current temperature is not matched with the target temperature, acquiring an abnormal factor affecting the current temperature.
Specifically, in this embodiment, the abnormality factor is a factor that affects the current temperature, for example, the reaction room temperature of the cell stack is too high or other abnormality factors.
Step S306: the current temperature is down-regulated based on the anomaly factor, the historical attemperation record, and the historical temperature.
Specifically, in this embodiment, the abnormality factor is first processed to be identical or similar to the condition in the historical temperature adjustment record, and then the current temperature is adjusted down according to the historical temperature adjustment record.
According to the thermal management method for the fuel cell stack, the target temperature adjustment degree is obtained according to the historical temperature adjustment record, the target temperature corresponding to the target temperature adjustment degree is obtained, whether the current temperature is matched with the target temperature or not is judged, if so, the change condition of the fuel cell stack is consistent with the change condition in the historical temperature adjustment record, and therefore the current temperature can be adjusted and controlled in a downward mode according to the temperature adjustment scheme in the historical temperature adjustment record; if the current temperature is not matched with the current temperature, the change condition of the battery stack is inconsistent with the change condition in the historical temperature regulation record, and an abnormal factor affecting the current temperature is inevitably present, so that the current temperature is regulated down according to the abnormal factor, the historical temperature regulation record and the historical temperature, the current temperature is regulated more quickly, the stability and the accuracy of the temperature control of the battery stack are improved, the current temperature is regulated down by combining the abnormal factor, and the temperature of the fuel battery stack is more accurately controlled.
Referring to fig. 4, in one implementation manner of the present embodiment, if the historical temperature adjustment record exists in step S202, step S401 to step S403 are further included after determining whether the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record:
step S401: and if the historical temperature corresponding to the current temperature does not exist in the historical temperature regulating record, acquiring the current flow of the internal circulation loop.
Specifically, in this embodiment, the current flow rate is the flow rate of the coolant in the current internal circulation loop.
Step S402: based on the historical temperature adjustment record, a flow temperature adjustment relationship is obtained.
Specifically, the flow temperature adjustment relationship is a correspondence relationship between different flows and adjustment temperatures in a unit time (e.g., one minute), for example, when the current flow is a, the current temperature will continue to rise, when the current flow is B, the current temperature will remain balanced, when the current flow is C, the current temperature will drop, etc., in this embodiment, the change rate of the current temperature is regarded as a fixed value in a certain time range.
Step S403: and (3) down-regulating the current temperature based on a preset temperature threshold, the current flow and a flow temperature regulation relationship.
Specifically, according to the preset temperature threshold and the flow temperature regulation relationship, the current flow is increased, so as to achieve the effect of down regulation.
In the thermal management method for a fuel cell stack provided in this embodiment, if there is no historical temperature corresponding to the current temperature in the historical temperature adjustment record, it indicates that the historical temperature consistent with or very similar to the current temperature is not subjected to temperature adjustment in the historical temperature adjustment record, and the current temperature cannot be directly subjected to down-adjustment by adopting the temperature adjustment scheme that has been generated in the historical temperature adjustment record, so that the current flow and the flow adjustment relationship of the internal circulation loop need to be obtained, and the current temperature is down-adjusted according to the preset first temperature threshold, the current flow and the flow adjustment relationship; when the historical temperature corresponding to the current temperature does not exist, the current temperature is regulated and controlled in real time according to the flow temperature regulation relation in the historical temperature regulation record, so that the temperature of the fuel cell stack can be controlled more accurately.
Referring to fig. 5, in one implementation manner of the present embodiment, if the current temperature does not exceed the preset first temperature threshold in step S106, step S501 to step S504 are further included after determining whether the current temperature exceeds the preset second temperature threshold:
step S501: and judging whether the current temperature exceeds a preset first temperature threshold again.
Step S502: and if the current temperature still exceeds the preset first temperature threshold value, acquiring the current temperature regulating degree and the maximum temperature regulating degree of the internal circulation loop.
Specifically, in this embodiment, the current temperature adjustment degree, that is, the temperature adjustment degree of the circulation loop in the current time node, may be determined according to the current opening of the valve controlling the internal circulation loop; the maximum degree of regulation, i.e. the maximum degree of regulation of the internal circulation circuit, can be preset according to the internal circulation circuit.
Step S503: and judging whether the current temperature regulating degree is equal to the maximum temperature regulating degree.
Step S504: and if the current temperature adjustment degree is equal to the maximum temperature adjustment degree, cooling the inner circulation loop based on the outer circulation loop.
Specifically, in this embodiment, energy exchange is achieved between the inner circulation loop and the outer circulation loop through the plate heat exchanger, and heat energy in the inner circulation loop is converted into heat energy in the outer circulation loop.
The thermal management method for a fuel cell stack provided in this embodiment exceeds a preset first temperature threshold, if the current temperature is still too high, it is determined whether the current temperature adjustment degree of the inner circulation loop is equal to the maximum temperature adjustment degree, if the current temperature adjustment degree of the inner circulation loop is equal to the maximum temperature adjustment degree, it is not possible to further increase the cooling effect according to the inner circulation loop, and therefore, it is necessary to increase the outer circulation loop to cool the inner circulation loop, so that the temperature of the fuel cell stack is accurately controlled by the inner circulation loop.
Referring to fig. 6, in one implementation manner of the present embodiment, after step S503, it is determined whether the current temperature adjustment degree is equal to the maximum temperature adjustment degree, steps S601 to S604 are further included:
step S601: if the current temperature adjustment degree is smaller than the maximum temperature adjustment degree, acquiring the temperature adjustment degree change condition based on the current temperature adjustment degree and the maximum temperature adjustment degree.
Specifically, the temperature adjustment degree change condition, that is, the change rate of the temperature adjustment degree, may be determined according to the change condition of the valve controlling the internal circulation loop in this embodiment.
Step S602: taking the current temperature before temperature adjustment as a first temperature, taking the current temperature after temperature adjustment as a second temperature, and acquiring the temperature change condition based on the first temperature and the second temperature.
Specifically, the temperature change condition, that is, the change condition of the current temperature, can be determined by the slope of the connection line between the first temperature and the second temperature, the initial value of the first temperature is the current temperature before temperature adjustment, the initial value of the second temperature is the current temperature obtained for the first time after temperature adjustment, in this embodiment, the second temperature and the first temperature are changeable, after the temperature change condition of a certain time node is calculated, the second temperature is taken as the first temperature, the current temperature is obtained again as the second temperature, and so on.
Step S603: based on the temperature change condition and the temperature adjustment degree change condition, judging whether the internal circulation loop meets the cooling requirement.
Specifically, the cooling requirement is a preset judgment standard for judging whether the current temperature can be adjusted down to the safety range, and in this embodiment, whether the inner circulation loop meets the cooling requirement is judged whether the current temperature can be adjusted down to the safety range by only independently changing the current temperature adjustment degree of the inner circulation loop.
Step S604: and if the internal circulation loop meets the cooling requirement, adjusting the current temperature adjusting degree based on the current temperature.
According to the heat management method of the fuel cell stack, if the current temperature regulation degree is smaller than the maximum temperature regulation degree, the current temperature regulation degree of the internal circulation loop does not reach the maximum temperature regulation degree, so that the temperature regulation effect can be further increased according to the internal circulation loop, the temperature regulation degree change condition and the temperature change condition are obtained, whether the internal circulation loop meets the temperature regulation requirement is judged according to the temperature regulation degree change condition and the temperature change condition, if so, the current temperature can be controlled by changing the current temperature regulation degree of the internal circulation loop, and the current temperature regulation degree is adjusted according to the current temperature; according to the temperature regulation degree change condition and the temperature change condition, whether the current temperature can be controlled and stabilized only by the internal circulation loop is judged, and the accurate control of the temperature of the battery stack is maintained, so that the energy conservation is facilitated.
Referring to fig. 7, in one implementation manner of the present embodiment, after determining whether the internal circulation loop meets the cooling requirement in step S603 based on the temperature change condition and the temperature adjustment degree change condition, step S701 is further included:
step S701: if the inner circulation loop does not meet the cooling requirement, the inner circulation loop is cooled based on the outer circulation loop, and the current temperature is adjusted downwards through the inner circulation loop.
Specifically, in this embodiment, the water pump in the internal circulation loop is operated normally, and meanwhile, temperature control is started, when the actual temperature of the internal circulation control is different from the target temperature value, the opening of a valve (for example, a three-way proportional valve) of the internal circulation loop is regulated by PID control, so as to regulate the proportion of hot water at the outlet of the electric pile to cold water cooled by plate exchange, and then, the accurate temperature of the cooling water inlet of the electric pile is ensured by means of cold-hot water converging, and in addition, the cooling liquid flow rate in the external circulation loop is regulated by the temperature difference control requirement of the cooling liquid outlet of the electric pile, so that the temperature regulation range of the internal circulation loop is further increased.
According to the thermal management method for the fuel cell stack, if the internal circulation loop does not meet the cooling requirement, the safety regulation and control on the current temperature cannot be kept only by changing the current temperature regulation degree of the internal circulation loop, so that the internal circulation loop is required to exchange heat through the external circulation loop while the current temperature is regulated down through the internal circulation loop, and the effect of finally regulating the current temperature down is achieved; the inner circulation loop and the outer circulation loop cooperate with each other, so that the regulation and control range of the current temperature is improved, and after the current temperature exceeds the maximum temperature regulation degree of the inner circulation loop, the temperature of the inner circulation loop is changed through the outer circulation loop, so that the effect of reducing the current temperature is achieved.
In a second aspect, the present application also discloses a thermal management system for a fuel cell stack.
Referring to fig. 8, a thermal management system of a fuel cell stack includes:
a first judging module 1 for judging whether an inner circulation loop and an outer circulation loop are detected;
the second judging module 2 is used for judging whether the inner circulation loop and the outer circulation loop meet corresponding preset loop requirements or not respectively if the inner circulation loop and the outer circulation loop are detected;
the acquisition module 3 is used for acquiring the current temperature of the fuel cell stack if the internal circulation loop and the external circulation loop meet the corresponding preset loop requirements;
a third judging module 4, configured to judge whether the current temperature exceeds a preset first temperature threshold;
the cooling module 5 is used for adjusting the current temperature downwards based on the preset first temperature threshold value if the current temperature exceeds the preset first temperature threshold value;
the fourth judging module 6 is configured to judge whether the current temperature exceeds a preset second temperature threshold if the current temperature does not exceed the preset first temperature threshold;
and the temperature raising module 7, wherein if the current temperature does not exceed the preset second temperature threshold, the temperature raising module 7 is configured to raise the current temperature based on the preset second temperature threshold.
In a third aspect, an embodiment of the present application discloses an intelligent terminal, including a memory, and a processor, where the memory is configured to store a computer program capable of running on the processor, and when the processor loads the computer program, the processor executes a thermal management method for a fuel cell stack according to the foregoing embodiment.
In a fourth aspect, embodiments of the present application disclose a computer readable storage medium, and a computer program stored in the computer readable storage medium, wherein the computer program, when loaded by a processor, performs a method of thermal management of a fuel cell stack of the above embodiments.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. A method of thermal management of a fuel cell stack, comprising:
judging whether an inner circulation loop and an outer circulation loop are detected;
if the inner circulation loop and the outer circulation loop are detected, judging whether the inner circulation loop and the outer circulation loop meet corresponding preset loop requirements or not respectively;
if the internal circulation loop and the external circulation loop meet the corresponding preset loop requirements, acquiring the current temperature of the fuel cell stack;
Judging whether the current temperature exceeds a preset first temperature threshold value or not;
if the current temperature exceeds the preset first temperature threshold value, the current temperature is adjusted downwards based on the preset first temperature threshold value;
if the current temperature does not exceed the preset first temperature threshold, judging whether the current temperature exceeds a preset second temperature threshold;
and if the current temperature does not exceed the preset second temperature threshold, up-regulating the current temperature based on the preset second temperature threshold.
2. The method according to claim 1, wherein the specific step of down-regulating the current temperature based on the preset first temperature threshold if the current temperature exceeds the preset first temperature threshold comprises:
if the current temperature exceeds the preset first temperature threshold, judging whether a historical temperature regulation record exists or not;
if the historical temperature regulation record exists, judging whether the historical temperature corresponding to the current temperature exists in the historical temperature regulation record or not;
and if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record, the current temperature is adjusted downwards based on the historical temperature adjustment record and the historical temperature.
3. The method according to claim 2, wherein if there is a historical temperature corresponding to the current temperature in the historical temperature adjustment record, the specific step of down-adjusting the current temperature based on the historical temperature adjustment record and the historical temperature includes:
if the historical temperature corresponding to the current temperature exists in the historical temperature adjustment record, acquiring a target temperature adjustment degree based on the historical temperature adjustment record;
based on the historical attemperation record, taking the historical temperature corresponding to the target attemperation degree as a target temperature;
judging whether the current temperature is matched with the target temperature or not;
if the current temperature is matched with the target temperature, the current temperature is adjusted downwards based on the historical temperature adjustment record and the historical temperature;
if the current temperature is not matched with the target temperature, acquiring an abnormal factor affecting the current temperature;
and down-regulating the current temperature based on the abnormality factor, the historical temperature regulation record and the historical temperature.
4. The method of thermal management of a fuel cell stack according to claim 2, further comprising, after said determining if there is said historical temperature regulation, determining if there is a historical temperature in said historical temperature regulation corresponding to said current temperature:
If the historical temperature corresponding to the current temperature does not exist in the historical temperature regulating record, acquiring the current flow of the internal circulation loop;
acquiring a flow temperature adjustment relationship based on the historical temperature adjustment record;
and based on the preset first temperature threshold, the current flow and the flow temperature regulation relationship, the current temperature is regulated downwards.
5. The method of claim 1, further comprising, after said downregulating said current temperature based on said preset first temperature threshold if said current temperature exceeds said preset first temperature threshold:
judging whether the current temperature exceeds the preset first temperature threshold again;
if the current temperature still exceeds the preset first temperature threshold value, acquiring the current temperature adjustment degree and the maximum temperature adjustment degree of the internal circulation loop;
judging whether the current temperature adjustment degree is equal to the maximum temperature adjustment degree or not;
and if the current temperature adjustment degree is equal to the maximum temperature adjustment degree, cooling the inner circulation loop based on the outer circulation loop.
6. The method of thermal management of a fuel cell stack according to claim 5, further comprising, after said determining whether said current temperature adjustment level is equal to said maximum temperature adjustment level:
If the current temperature adjustment degree is smaller than the maximum temperature adjustment degree, acquiring a temperature adjustment degree change condition based on the current temperature adjustment degree and the maximum temperature adjustment degree;
taking the current temperature before temperature adjustment as a first temperature, taking the current temperature after temperature adjustment as a second temperature, and acquiring a temperature change condition based on the first temperature and the second temperature;
judging whether the internal circulation loop meets the cooling requirement or not based on the temperature change condition and the temperature adjustment degree change condition;
and if the internal circulation loop meets the cooling requirement, adjusting the current temperature adjustment degree based on the current temperature.
7. The method according to claim 6, wherein after said determining whether said internal circulation circuit satisfies a temperature reduction requirement based on said temperature change condition and said temperature adjustment degree change condition, further comprising:
and if the inner circulation loop does not meet the cooling requirement, cooling the inner circulation loop based on the outer circulation loop, and downwards regulating the current temperature through the inner circulation loop.
8. A thermal management system for a fuel cell stack, comprising:
A first judging module (1) for judging whether an inner circulation loop and an outer circulation loop are detected;
the second judging module (2) is used for judging whether the inner circulation loop and the outer circulation loop meet corresponding preset loop requirements or not respectively if the inner circulation loop and the outer circulation loop are detected;
the acquisition module (3) is used for acquiring the current temperature of the fuel cell stack if the inner circulation loop and the outer circulation loop meet the corresponding preset loop requirements;
a third judging module (4) for judging whether the current temperature exceeds a preset first temperature threshold;
the cooling module (5) is used for downwards regulating the current temperature based on the preset first temperature threshold value if the current temperature exceeds the preset first temperature threshold value;
a fourth judging module (6), wherein if the current temperature does not exceed the preset first temperature threshold, the fourth judging module (6) is used for judging whether the current temperature exceeds a preset second temperature threshold;
and the temperature rising module (7) is used for rising the current temperature based on the preset second temperature threshold value if the current temperature does not exceed the preset second temperature threshold value.
9. A smart terminal comprising a memory, a processor, wherein the memory is adapted to store a computer program capable of running on the processor, and wherein the processor, when loaded with the computer program, performs the method of any of claims 1 to 7.
10. A computer readable storage medium having a computer program stored therein, characterized in that the computer program, when loaded by a processor, performs the method of any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311643804.9A CN117476980A (en) | 2023-12-01 | 2023-12-01 | Thermal management method, system, terminal and storage medium for fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311643804.9A CN117476980A (en) | 2023-12-01 | 2023-12-01 | Thermal management method, system, terminal and storage medium for fuel cell stack |
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| Publication Number | Publication Date |
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| CN117476980A true CN117476980A (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311643804.9A Withdrawn CN117476980A (en) | 2023-12-01 | 2023-12-01 | Thermal management method, system, terminal and storage medium for fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117476980A (en) |
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2023
- 2023-12-01 CN CN202311643804.9A patent/CN117476980A/en not_active Withdrawn
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