CN115566230A - Fuel cell temperature control method, system, fuel cell, and storage medium - Google Patents
Fuel cell temperature control method, system, fuel cell, and storage medium Download PDFInfo
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- CN115566230A CN115566230A CN202110746610.6A CN202110746610A CN115566230A CN 115566230 A CN115566230 A CN 115566230A CN 202110746610 A CN202110746610 A CN 202110746610A CN 115566230 A CN115566230 A CN 115566230A
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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
- H01M8/04358—Temperature; Ambient temperature of the coolant
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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
- H01M8/04029—Heat exchange using liquids
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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
- H01M8/04723—Temperature of the coolant
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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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- 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 invention relates to the technical field of fuel cells, in particular to a fuel cell temperature control method, a system, a fuel cell and a storage medium, wherein the method comprises the steps of judging whether the water temperature of a galvanic pile reaches a preset temperature or not, and if not, closing a thermostat; if so, adjusting the thermostat according to the difference between the inlet temperature and the inlet target value, the difference between the outlet temperature and the outlet target temperature, and the predicted time for the inlet and the outlet to exceed the target temperatures; according to the invention, through the mixing process of the large and small circulation loops, when the thermostat regulates the water temperature at the inlet of the galvanic pile, the water temperature at the outlet of the galvanic pile is regulated at the same time, so that the water temperatures at the inlet and the outlet can be ensured not to be over-heated, and the fuel cell can continue to operate and stably pass through the mixing process; the adaptability is strong, the fuel cell is not over-temperature, the opening of the thermostat can be automatically adjusted according to the water flow, the temperature is stable, and the service life of the fuel cell is prolonged.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell temperature control method, a fuel cell temperature control system, a fuel cell and a storage medium.
Background
In order to reduce environmental pollution and relieve energy pressure, the trend of researching new energy automobiles has been raised worldwide since the last century, and the current mainstream types are storage battery pure electric automobiles, hybrid electric automobiles and fuel cell automobiles.
Hydrogen fuel cells are generally composed of proton exchange membranes, bipolar electrodes, and are devices that produce water and electricity by the reaction of hydrogen and oxygen. The reaction process does not involve an intermediate device, the energy efficiency is high, and the reaction product is only water, so that the environment is not polluted, and the method belongs to a real pollution-free zero-emission automobile. The proton exchange membrane fuel cell is an ideal energy source for future automobiles.
Fuel cell engines need to operate at a suitable temperature, and excessive temperatures or temperatures can affect engine efficiency and life. In order to ensure that the operating temperature of the fuel cell reaches the proper operating temperature as soon as possible and the optimal performance is achieved, the cooling system of the fuel cell needs to be designed into a cooling system with switchable large and small circulation, so that the temperature of the fuel cell can be quickly raised when the temperature is low, and the temperature can be lowered through an external heat dissipation system when the temperature is high
When the temperature is low, in order to ensure the low-temperature quick start of the fuel cell, the temperature is required to be adjusted to be small circulation through a thermostat;
when the temperature reaches the proper temperature of the fuel cell, adjusting the angle of the thermostat to mix the cooling liquid in the large circulation to the small circulation for cooling;
and finally, when the large circulation temperature is consistent with the small circulation temperature, the thermostat is fully opened, and the temperature of the cooling liquid is controlled through the heat dissipation system, so that the stability of the operation temperature of the fuel cell is ensured.
However, the sizes of the circulating calibers of the existing cooling systems are not consistent, so that the mixing process is caused, the sizes of the circulating resistances of the thermostats and the water flow are not consistent, the inlet temperature meets a target value in the starting process of the thermostats, the temperature difference between the inlet and the outlet of the thermopile is large, the outlet overtemperature can be caused, and the flow resistance of the whole vehicle pipeline is different, so that the adjusting parameters of the thermostats of different vehicle types are not consistent and are difficult to be compatible.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a method, a system, a fuel cell and a storage medium for controlling the temperature of a fuel cell with higher compatibility are provided.
In order to solve the above technical problems, the first technical solution adopted by the present invention is:
a method for controlling the temperature of a fuel cell, comprising
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; and if so, adjusting the thermostat according to the difference between the inlet temperature and the inlet target value, the difference between the outlet temperature and the outlet target temperature and the predicted time for the inlet and the outlet to exceed the target temperatures.
In order to solve the above technical problems, the second technical solution adopted by the present invention is:
a fuel cell temperature control system includes
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; if so, performing PI regulation on the thermostat according to the difference value between the inlet temperature and the inlet target value, the difference value between the outlet temperature and the outlet target temperature and the predicted time for the inlet and the outlet to exceed the target temperatures.
In order to solve the above technical problems, the third technical solution adopted by the present invention is:
a fuel cell comprises a stack and a cooling system connected to the stack, wherein the cooling system comprises a large circulation loop, a small cooling circulation loop and a thermostat for controlling the mixing of the large circulation loop and the small cooling circulation loop, and the thermostat is controlled by the fuel cell temperature control method.
In order to solve the above technical problem, a fourth technical solution adopted by the present invention is:
a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the fuel cell temperature control method described above.
The invention has the beneficial effects that: through the mixing process of the large and small circulation loops, when the thermostat adjusts the water temperature at the inlet of the galvanic pile, the water temperature at the outlet of the galvanic pile is adjusted at the same time, and when the inlet temperature approaches a target value, the thermostat is adjusted to control the inlet temperature, so that the inlet of the system is not over-heated; when the outlet temperature approaches the target value, adjusting the thermostat to control the outlet temperature and ensuring that the outlet of the system does not exceed the temperature; when the temperature difference is large, the outlet temperature approaches the target value, the thermostat is started at the moment, the inlet temperature is reduced, and the outlet temperature is not over-heated; the adaptability is strong, the fuel cell is not over-temperature, the opening of the thermostat can be automatically adjusted according to the water flow, the temperature is stable, and the service life of the fuel cell is prolonged.
Drawings
Fig. 1 is a flow chart illustrating a method for controlling the temperature of a fuel cell according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a method for controlling the temperature of a fuel cell includes
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; if so, adjusting the thermostat according to the difference between the inlet temperature and the inlet target value, the difference between the outlet temperature and the outlet target temperature and the estimated time for the inlet and the outlet to exceed the target temperatures.
Further, the thermostat calculates an adjustment rate based on the time the inlet is expected to exceed the target temperature and modifies the adjustment rate based on the time the outlet is expected to exceed the target temperature.
Further, the thermostat performs angle adjustment according to the difference between the inlet temperature and the inlet target value, the difference between the outlet temperature and the outlet target temperature, and the adjustment speed and/or the corrected adjustment speed.
Further, the time that the inlet exceeds the target temperature is obtained according to the inlet temperature rise rate and the heat generation power of the fuel cell.
Further, the time for the outlet to exceed the target temperature is obtained according to the outlet temperature rise rate and the heat generation power of the fuel cell.
A fuel cell temperature control system includes
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; if so, performing PI regulation on the thermostat according to the difference value between the inlet temperature and the inlet target value, the difference value between the outlet temperature and the outlet target temperature and the predicted time for the inlet and the outlet to exceed the target temperatures.
Further, the thermostat calculates the adjusting speed of the PI parameter according to the time that the predicted inlet exceeds the target temperature, and corrects and calculates the adjusting speed of the PI parameter according to the time that the predicted outlet exceeds the target temperature.
A fuel cell system comprises a stack and a cooling system connected to the stack, wherein the cooling system comprises a large circulation loop, a small cooling circulation loop and a thermostat for controlling the mixing of the large circulation loop and the small cooling circulation loop, and the thermostat is controlled by the fuel cell temperature control method.
Further, when the inlet temperature of the galvanic pile is close to a target value, the thermostat is adjusted to control the inlet temperature;
when the outlet temperature of the galvanic pile is close to the target value, adjusting the thermostat to control the outlet temperature;
when the temperature difference between the inlet and the outlet of the galvanic pile is larger than the threshold value, if the outlet temperature is close to the target value, the thermostat is opened at the moment, and the inlet temperature is reduced.
A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the fuel cell temperature control method described above.
According to the description, through the mixing process of the size circulation loop, when the thermostat regulates the water temperature at the inlet of the galvanic pile, the water temperature at the outlet of the galvanic pile is regulated, and when the inlet temperature is close to a target value, the thermostat is regulated to control the inlet temperature, so that the inlet of the system is not over-heated; when the outlet temperature approaches the target value, adjusting the thermostat to control the outlet temperature and ensuring that the outlet of the system does not exceed the temperature; when the temperature difference is large, the outlet temperature approaches the target value, the thermostat is started at the moment, the inlet temperature is reduced, and the outlet temperature is not over-heated; the adaptability is strong, the fuel cell is not over-temperature, the opening of the thermostat can be automatically adjusted according to the water flow, the temperature is stable, and the service life of the fuel cell is prolonged.
Example one
A fuel cell temperature control method includes
S1, judging whether the water temperature reaches a preset temperature or not, and entering S13 if the water temperature does not reach the preset temperature;
s2, calculating the change rate of the actual inlet temperature after the preset temperature is reached;
s3, calculating the heat generation power of the fuel cell;
s4, predicting the overtemperature time of the inlet temperature according to the heat generation quantity and the change rate of the actual inlet temperature;
s5, calculating the change rate of the actual outlet temperature;
s6, calculating the heat generation power of the fuel cell;
s7, predicting the overtemperature time of the outlet temperature according to the heat generation quantity and the change rate of the actual outlet temperature;
s8, calculating the adjusting speed of the PI parameter according to the time when the inlet is predicted to exceed the target temperature;
s9, correcting and calculating the adjusting speed of the PI parameter according to the time when the outlet is predicted to exceed the target temperature;
s10, calculating a difference value between the inlet temperature and an inlet target value;
s11, calculating an outlet temperature and an outlet target temperature difference;
s12, performing PI calculation to ensure that the temperature of the inlet and the outlet does not exceed a target value;
and S13, closing the thermostat after the water temperature is lower than the preset temperature.
Example two
A fuel cell temperature control system includes
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; if so, carrying out PI regulation on the thermostat according to the difference between the inlet temperature and the inlet target value, the difference between the outlet temperature and the outlet target temperature and the estimated time when the inlet and the outlet exceed the target temperatures.
And the thermostat calculates the adjusting speed of the PI parameter according to the time when the predicted inlet exceeds the target temperature, and corrects and calculates the adjusting speed of the PI parameter according to the time when the predicted outlet exceeds the target temperature.
The time the inlet exceeds the target temperature is obtained from the inlet temperature rise rate and the power generated by the fuel cell.
The time for the outlet to exceed the target temperature is obtained according to the outlet temperature rise rate and the heat generation power of the fuel cell.
EXAMPLE III
A fuel cell system comprises a stack and a cooling system connected to the stack, wherein the cooling system comprises a large circulation loop, a small cooling circulation loop and a thermostat for controlling the mixing of the large circulation loop and the small cooling circulation loop, and the thermostat is controlled by the fuel cell temperature control method in the embodiment I.
When the temperature of the inlet of the galvanic pile is close to a target value, adjusting the thermostat to control the temperature of the inlet;
when the outlet temperature of the galvanic pile is close to the target value, adjusting the thermostat to control the outlet temperature;
when the temperature difference between the inlet and the outlet of the galvanic pile is larger than a threshold value, if the outlet temperature is close to a target value, the thermostat is started at the moment, and the inlet temperature is reduced.
Example four
A computer-readable storage medium on which a computer program is stored, which when executed by a processor implements a fuel cell temperature control method according to an embodiment.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for controlling the temperature of a fuel cell, comprising
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; and if so, adjusting the thermostat according to the difference between the inlet temperature and the inlet target value, the difference between the outlet temperature and the outlet target temperature and the predicted time for the inlet and the outlet to exceed the target temperatures.
2. The fuel cell temperature control method according to claim 1, wherein the thermostat calculates the adjustment speed based on a time at which the inlet is expected to exceed the target temperature, and corrects the adjustment speed based on a time at which the outlet is expected to exceed the target temperature.
3. The fuel cell temperature control method according to claim 1, wherein the thermostat makes an angle adjustment according to a difference between an inlet temperature and an inlet target value, an outlet temperature and an outlet target temperature difference, and an adjustment speed and/or a corrected adjustment speed.
4. The fuel cell temperature control method according to claim 1, wherein the time at which the inlet exceeds the target temperature is obtained from an inlet temperature increase rate and a heat generation power of the fuel cell.
5. The fuel cell temperature control method according to claim 1, wherein the time at which the outlet exceeds the target temperature is obtained from an outlet temperature increase rate and a heat generation power of the fuel cell.
6. A fuel cell temperature control system, comprising
Judging whether the water temperature of the galvanic pile reaches a preset temperature, if not, closing the thermostat; if so, performing PI regulation on the thermostat according to the difference value between the inlet temperature and the inlet target value, the difference value between the outlet temperature and the outlet target temperature and the predicted time for the inlet and the outlet to exceed the target temperatures.
7. The fuel cell temperature control system according to claim 6, wherein the thermostat calculates an adjustment speed of the PI parameter based on a time at which the inlet is expected to exceed the target temperature, and corrects the adjustment speed of the PI parameter based on a time at which the outlet is expected to exceed the target temperature.
8. A fuel cell comprising a stack and a cooling system connected to the stack, the cooling system comprising a large circulation circuit, a small cooling circulation circuit, and a thermostat for controlling the mixture of the large circulation circuit and the small cooling circulation circuit, the thermostat being controlled by the fuel cell temperature control method according to any one of claims 1 to 5.
9. The fuel cell of claim 8, wherein the thermostat is adjusted to control the inlet temperature when the stack inlet temperature approaches a target value;
when the outlet temperature of the galvanic pile is close to the target value, adjusting the thermostat to control the outlet temperature;
when the temperature difference between the inlet and the outlet of the galvanic pile is larger than a threshold value, if the outlet temperature is close to a target value, the thermostat is started at the moment, and the inlet temperature is reduced.
10. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the fuel cell temperature control method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110746610.6A CN115566230A (en) | 2021-07-01 | 2021-07-01 | Fuel cell temperature control method, system, fuel cell, and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110746610.6A CN115566230A (en) | 2021-07-01 | 2021-07-01 | Fuel cell temperature control method, system, fuel cell, and storage medium |
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| CN115566230A true CN115566230A (en) | 2023-01-03 |
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| CN202110746610.6A Pending CN115566230A (en) | 2021-07-01 | 2021-07-01 | Fuel cell temperature control method, system, fuel cell, and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116936883A (en) * | 2023-09-14 | 2023-10-24 | 北京英博新能源有限公司 | Fuel cell stack water temperature control system, method, equipment and medium |
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2021
- 2021-07-01 CN CN202110746610.6A patent/CN115566230A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116936883A (en) * | 2023-09-14 | 2023-10-24 | 北京英博新能源有限公司 | Fuel cell stack water temperature control system, method, equipment and medium |
| CN116936883B (en) * | 2023-09-14 | 2023-12-08 | 北京英博新能源有限公司 | Fuel cell stack water temperature control system, method, equipment and medium |
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