CN113363528A - Fuel cell thermal management system and control method thereof - Google Patents
Fuel cell thermal management system and control method thereof Download PDFInfo
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- CN113363528A CN113363528A CN202010143467.7A CN202010143467A CN113363528A CN 113363528 A CN113363528 A CN 113363528A CN 202010143467 A CN202010143467 A CN 202010143467A CN 113363528 A CN113363528 A CN 113363528A
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- 239000000446 fuel Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000017525 heat dissipation Effects 0.000 claims abstract description 361
- 239000000110 cooling liquid Substances 0.000 claims abstract description 55
- 239000002826 coolant Substances 0.000 claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 15
- 230000003247 decreasing effect Effects 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims 4
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 23
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002678 macrocyclic compounds Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007800 oxidant agent 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
- H01M8/04007—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
- H01M8/04007—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
- H01M8/04313—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
- H01M8/04313—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
- H01M8/04365—Temperature; Ambient temperature of other components of a fuel cell or fuel cell stacks
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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
- H01M8/04298—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
- H01M8/04731—Temperature of other components of a fuel cell or fuel cell stacks
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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 invention relates to a fuel cell thermal management system and a control method thereof, belonging to the technical field of fuel cells. The control method comprises the steps of obtaining the temperature of cooling liquid flowing through the nth heat dissipation channel; and if the temperature is higher than/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel into/out of use. According to the invention, the opening/closing of the valves in the radiator is sequentially controlled to sequentially control the input/exit of the radiating channel according to the overall radiating requirement of the system, so that the use number of the radiator is increased or reduced step by step, the adjusting times of the three-way valve are reduced, and the service life of the three-way valve is prolonged. In addition, the heat dissipation power of each radiator can be adjusted in a stepless mode from small to large or from large to small, and the accuracy of temperature adjustment is further improved.
Description
Technical Field
The invention relates to a fuel cell thermal management system and a control method thereof, belonging to the technical field of fuel cells.
Background
The fuel cell is a power generation device which directly converts chemical energy in externally supplied fuel and oxidant into electric energy, heat energy and other reaction products through electrochemical reaction, and a cell stack in the fuel cell is formed by overlapping a plurality of single cells (membrane electrodes). The larger the generated power of the fuel cell is, the larger the generated power is, and this is in a proportional relationship. As the power demand of the vehicle increases, the power generation power demand of the fuel cell also gradually increases, and therefore the heat dissipation management of the fuel cell becomes an important part of the fuel cell.
As shown in fig. 1, the core components of the conventional fuel cell thermal management system are a water pump 4, a thermostat/three-way valve 3 (i.e., an electrically controlled three-way valve), a radiator (including a radiator fan), and the like, and the purpose of the thermal management system is to maintain the outlet water temperature and the inlet water temperature of a fuel cell stack 5 to meet the stack requirements, i.e., the water temperatures (i.e., the temperatures of coolant) at positions where a T1 temperature sensor 1 and a T2 temperature sensor 2 are located are maintained within a range, and the main means for maintaining the water temperatures include a small cycle and a large cycle. For a high-power fuel cell, the required radiators are large, multiple groups of radiators are required, namely a second radiator 6 and a first radiator 8, the second radiator 6 and the first radiator 8 are generally connected in parallel, and the small circulation of a fuel cell cooling system is that fuel cell cooling liquid flows through a water pump 4 and a three-way valve 3 after coming out of a fuel cell stack 5 and directly returns to the stack without flowing through the second radiator 6 and the first radiator 8, so that the fuel cell can be rapidly heated at the initial starting stage. The fuel cell cooling system has a large circulation, the fuel cell coolant flows through the water pump 4, the second radiator 6, the first radiator 8 and the three-way valve 3 and returns to the fuel cell stack after coming out of the fuel cell stack 5, the large circulation can adjust the heat dissipation capacity of the coolant in a circulation pipeline by controlling the opening of the three-way valve 3 or the air speed of a cooling fan in the radiator, and then the temperature of the coolant at the water inlet of the fuel cell stack 5 is controlled to cool the fuel cell stack 5.
Specifically, the control logic of the large-cycle heat dissipation management in the conventional fuel cell thermal management system is shown in fig. 2: when the opening degree of the three-way valve 3 is smaller than the set opening degree upper limit value, the heat radiation fan is not started, and the temperature of the cooling liquid at the water outlet or the temperature of the cooling liquid at the water inlet of the fuel cell stack 5 is controlled by adjusting the opening degree of the three-way valve 3; when the opening degree of the three-way valve 3 is greater than or equal to the set opening degree upper limit value a, all the radiator fans are opened, and the temperature of the coolant at the water outlet or the temperature of the coolant at the water inlet of the fuel cell stack 5 is controlled by controlling the rotating speed of the radiator fans.
However, in winter, when the ambient temperature is low and all the cooling fans do not work, the heat dissipation capacity of the radiator is very large, and in order to maintain the temperature of the cooling liquid at the water outlet and the temperature of the cooling liquid at the water inlet of the fuel cell stack 5, the three-way valve needs to work frequently, and the flow rates of large and small cycles are continuously adjusted, so that the service life of the three-way valve is shortened, and the control precision is also very low.
Disclosure of Invention
The application aims to provide a fuel cell thermal management system and a control method thereof, which are used for solving the problem that a three-way valve in the existing thermal management system is short in service life.
In order to achieve the above object, the present invention provides a first technical solution of a control method of a fuel cell thermal management system, which sequentially puts a plurality of heat dissipation channels and a heat sink correspondingly connected to the heat dissipation channels into/out of use according to a set sequence, where the plurality of heat dissipation channels include an nth and an n +1 th heat dissipation channels, n is greater than 1, the heat dissipation channels are used to provide a coolant to a fuel cell stack, valves are provided in the heat dissipation channels, the valves are used to control the connection and disconnection between the heat dissipation channels and the fuel cell, and the process of putting into/out of use includes the following steps:
(1) acquiring the temperature of the cooling liquid flowing through the nth heat dissipation channel;
(2) and if the temperature is higher than/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected radiator into/out of use.
The control method of the first fuel cell thermal management system has the following beneficial effects: the method controls the heat dissipation channel and the correspondingly connected radiator to be put into or taken out of work in sequence by controlling the on-off of the valve, thereby replacing or replacing the opening adjustment of the three-way valve in the system and changing the heat dissipation power of the whole system. Therefore, if the three-way valve reaches the upper limit of the set opening, the temperature of the cooling liquid in the last opened heat dissipation channel is detected, whether the heat dissipation power of the current system is insufficient or excessive can be judged, if the temperature is continuously higher than the target value, the current flow of the cooling liquid cannot meet the heat dissipation requirement of the system, the heat dissipation channel and a radiator which is correspondingly connected need to be added, therefore, the valve of the next heat dissipation channel is opened, and after the valve of the next heat dissipation channel is opened, if the temperature of the last heat dissipation channel is continuously lower than the target value, the flow of the cooling liquid is excessive, and the valve of the next heat dissipation channel is closed. According to the overall heat dissipation requirement of the system, the valves in the heat dissipation channel are sequentially controlled to be opened/closed so as to sequentially control the heat dissipation channel and the input/output of the correspondingly connected radiators, and further control the flow of the cooling liquid and the number of the radiators which are input/output to work, so that the heat dissipation power is not required to be changed by frequently adjusting the three-way valve as in the prior art, namely the adjusting workload of the original three-way valve is dispersed to a plurality of valves, the adjusting times of the three-way valve is reduced, and the service life of the three-way valve is prolonged.
Furthermore, in order to adjust the temperature more quickly and accurately, for the heat dissipation channel with n being more than or equal to 2, the temperature is the temperature of the cooling liquid at the water outlet of the nth heat dissipation channel.
Furthermore, when n is 1, only one heat dissipation channel is opened, and the coolant in the pipeline in the large circulation is the coolant flowing through the 1 st heat dissipation channel, so that for the flexibility of control, for the heat dissipation channel with n being 1, the temperature is the temperature of the coolant at the water outlet of the 1 st heat dissipation channel, or the temperature of the coolant at the water inlet of the fuel cell stack, or the temperature of the coolant at the water outlet of the fuel cell stack.
In addition, the invention also provides a technical scheme of a control method of a second fuel cell thermal management system, a plurality of heat dissipation channels and a heat radiator correspondingly connected with the heat dissipation channels are put into/taken out of use according to a set sequence, the plurality of heat dissipation channels comprise the nth and the (n + 1) th heat dissipation channels, n is larger than 1, the heat dissipation channels are used for providing cooling liquid for a fuel cell stack, valves are arranged in the heat dissipation channels and are used for controlling the connection and disconnection of the heat dissipation channels and the fuel cell, and the putting into/taking out of use process comprises the following steps:
(1) acquiring the temperature of cooling liquid flowing through the nth heat dissipation channel and acquiring the heat dissipation power of a heat sink correspondingly connected with the nth heat dissipation channel; performing PID adjustment on the heat dissipation power of the radiator between the minimum heat dissipation power and the maximum heat dissipation power according to the difference value between the temperature and the target value;
(2) and if the heat dissipation power is increased/reduced to the maximum/minimum heat dissipation power and the temperature is higher/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected heat radiator into/out of use.
The second control method of the fuel cell thermal management system has the following beneficial effects: the method controls the heat dissipation channel and the correspondingly connected radiators to be put into or taken out of operation in sequence by controlling the on-off of the valve, so that the opening adjustment of a three-way valve in the system is replaced or replaced, the heat dissipation power of the whole system is changed, the heat dissipation power of each radiator is subjected to stepless adjustment from small to large or from large to small, and the temperature adjustment accuracy is improved. Therefore, if the three-way valve reaches the upper limit of the set opening, the temperature of the cooling liquid in the last opened heat dissipation channel and the heat dissipation capacity of the last radiator are detected, whether the heat dissipation power of the current system is insufficient or excessive can be judged, if the heat dissipation power of the radiator is increased to the maximum heat dissipation power, and after the system is operated in full load (namely, the heat dissipation capacity reaches the limit), the temperature is continuously higher than a target value, the heat dissipation capacity and the flow of the cooling liquid of the current radiator cannot meet the heat dissipation requirement of the system, the heat dissipation channel and the correspondingly connected radiator need to be increased, so that the valve of the next heat dissipation channel is opened, and after the valve of the next heat dissipation channel is opened, if the heat dissipation power of the radiator of the last heat dissipation channel is reduced to the minimum heat dissipation power, the temperature is continuously lower than the target value, the current integral heat dissipation capacity is excessive and the flow of the cooling liquid is excessive, the valve of the next heat dissipation channel is closed. According to the overall heat dissipation requirement of the system, the valves in the heat dissipation channel are sequentially controlled to be opened/closed so as to sequentially control the heat dissipation channel and the input/output of the correspondingly connected radiators, and further control the flow of the cooling liquid and the number of the radiators which are input/output to work, so that the heat dissipation power is not required to be changed by frequently adjusting the three-way valve as in the prior art, namely the adjusting workload of the original three-way valve is dispersed to a plurality of valves, the adjusting times of the three-way valve is reduced, and the service life of the three-way valve is prolonged. In addition, in order to avoid the waste of the heat dissipation power of the heat dissipater, the heat dissipation power is adjustable, and the next heat dissipation channel is opened only when the heat dissipation capacity of the previous heat dissipater reaches the maximum value and the heat dissipation requirement cannot be met; in order to reduce the opening/closing times of the valve, the valve of the next heat dissipation channel is closed after the heat dissipation power of the radiator of the previous heat dissipation channel is reduced to the minimum heat dissipation power and the temperature is continuously lower than a target value; meanwhile, the temperature of the cooling liquid flowing through the cooling channel is adjusted by adjusting the cooling power of the radiator, so that the accuracy of temperature control is improved.
Further, in order to improve the accuracy of temperature control, the heat sink includes a heat dissipation fan, and the heat dissipation power is increased/decreased by increasing/decreasing the rotation speed of the heat dissipation fan in the heat sink.
Furthermore, in order to adjust the temperature more quickly and accurately, for the heat dissipation channel with n being more than or equal to 2, the temperature is the temperature of the cooling liquid at the water outlet of the nth heat dissipation channel.
Furthermore, when n is 1, only one heat dissipation channel is opened, and the coolant in the pipeline in the large circulation is the coolant flowing through the 1 st heat dissipation channel, so that for the flexibility of control, for the heat dissipation channel with n being 1, the temperature is the temperature of the coolant at the outlet of the nth heat dissipation channel, or the temperature of the coolant at the inlet of the fuel cell stack, or the temperature of the coolant at the outlet of the fuel cell stack.
In addition, the present invention also provides a technical solution of a first fuel cell thermal management system, including a cooling circulation pipeline, a three-way valve for controlling a flow rate of a coolant in the cooling circulation pipeline, and a plurality of radiators connected in parallel, where each radiator is connected to a corresponding heat dissipation channel, the heat dissipation channels connected to the plurality of radiators include an nth and an n +1 th heat dissipation channel, n is greater than 1, and the heat dissipation channels are used for providing the coolant to a fuel cell stack, and further including:
the temperature sensor is used for detecting the temperature of the cooling liquid flowing through each heat dissipation channel;
the valve is arranged in the heat dissipation channel and used for controlling the connection and disconnection of the heat dissipation channel and the fuel cell;
the controller comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the technical scheme of the control method of the first fuel cell thermal management system when executing the computer program.
The first fuel cell thermal management system has the beneficial effects that: on the basis of the prior art, the system is additionally provided with the heat dissipation channels correspondingly connected with the radiators, the temperature sensors for detecting the temperature of the cooling liquid flowing through the heat dissipation channels and the valves for controlling the connection and disconnection of the heat dissipation channels and the fuel cell, and the control of the connection and disconnection of the heat dissipation channels and the radiators correspondingly connected with the heat dissipation channels according to the on-off of the control valves is realized through the detected temperature and the corresponding control logic, so that the opening adjustment of the three-way valves in the system is replaced or replaced, and the heat dissipation power of the whole system is changed. Therefore, if the three-way valve reaches the upper limit of the set opening, the temperature of the cooling liquid in the last opened heat dissipation channel is detected, whether the heat dissipation power of the current system is insufficient or excessive can be judged, if the temperature is continuously higher than the target value, the current flow of the cooling liquid cannot meet the heat dissipation requirement of the system, the heat dissipation channel and a radiator which is correspondingly connected need to be added, therefore, the valve of the next heat dissipation channel is opened, and after the valve of the next heat dissipation channel is opened, if the temperature of the last heat dissipation channel is continuously lower than the target value, the flow of the cooling liquid is excessive, and the valve of the next heat dissipation channel is closed. According to the overall heat dissipation requirement of the system, the valves in the heat dissipation channel are sequentially controlled to be opened/closed so as to sequentially control the heat dissipation channel and the input/output of the correspondingly connected radiators, and further control the flow of the cooling liquid and the number of the radiators which are input/output to work, so that the heat dissipation power is not required to be changed by frequently adjusting the three-way valve as in the prior art, namely the adjusting workload of the original three-way valve is dispersed to a plurality of valves, the adjusting times of the three-way valve is reduced, and the service life of the three-way valve is prolonged.
Furthermore, in order to adjust the temperature more quickly and accurately, for the heat dissipation channel with n being more than or equal to 2, the temperature is the temperature of the cooling liquid at the water outlet of the nth heat dissipation channel.
Furthermore, when n is 1, only one heat dissipation channel is opened, and the coolant in the pipeline in the large circulation is the coolant flowing through the 1 st heat dissipation channel, so that for the flexibility of control, for the heat dissipation channel with n being 1, the temperature is the temperature of the coolant at the water outlet of the 1 st heat dissipation channel, or the temperature of the coolant at the water inlet of the fuel cell stack, or the temperature of the coolant at the water outlet of the fuel cell stack.
In addition, the present invention also provides a second fuel cell thermal management system, which includes a cooling circulation pipeline, a three-way valve for controlling the flow rate of a cooling liquid in the cooling circulation pipeline, and a plurality of radiators connected in parallel, wherein each radiator is connected to a corresponding heat dissipation channel, the heat dissipation channels connected to the plurality of radiators include the nth and the (n + 1) th heat dissipation channels, n is greater than 1, and the heat dissipation channels are used for providing the cooling liquid to a fuel cell stack, and further includes:
the detection device is used for detecting the heat dissipation power of each radiator;
the temperature sensor is used for detecting the temperature of the cooling liquid flowing through each heat dissipation channel;
the valve is arranged in the heat dissipation channel and used for controlling the connection and disconnection of the heat dissipation channel and the fuel cell;
the controller comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the technical scheme of the control method of the second fuel cell thermal management system when executing the computer program.
The second fuel cell thermal management system has the beneficial effects that: the system is added with a heat dissipation channel correspondingly connected with each radiator, a temperature sensor for detecting the temperature of cooling liquid flowing through each heat dissipation channel, a detection device for detecting the heat dissipation power of the radiators and a valve for controlling the communication and disconnection of the heat dissipation channel and the fuel cell on the basis of the prior art, and realizes that the radiators correspondingly connected with the heat dissipation channel and the radiators are controlled to be put into or taken out of work in sequence by controlling the on-off of the valve through the detected temperature, the detected heat dissipation power and corresponding control logic, so that the opening adjustment of a three-way valve in the system is replaced or replaced, the heat dissipation power of the whole system is changed, the heat dissipation power of each radiator is subjected to stepless adjustment from small to large or from large to small, and the accuracy of temperature adjustment is improved. Therefore, if the three-way valve reaches the upper limit of the set opening, the temperature of the cooling liquid in the last opened heat dissipation channel and the heat dissipation capacity of the last radiator are detected, whether the heat dissipation power of the current system is insufficient or excessive can be judged, if the heat dissipation power of the radiator is increased to the maximum heat dissipation power, and after the system is operated in full load (namely, the heat dissipation capacity reaches the limit), the temperature is continuously higher than a target value, the heat dissipation capacity and the flow of the cooling liquid of the current radiator cannot meet the heat dissipation requirement of the system, the heat dissipation channel and the correspondingly connected radiator need to be increased, so that the valve of the next heat dissipation channel is opened, and after the valve of the next heat dissipation channel is opened, if the heat dissipation power of the radiator of the last heat dissipation channel is reduced to the minimum heat dissipation power, the temperature is continuously lower than the target value, the current integral heat dissipation capacity is excessive and the flow of the cooling liquid is excessive, the valve of the next heat dissipation channel is closed. According to the overall heat dissipation requirement of the system, the valves in the heat dissipation channel are sequentially controlled to be opened/closed so as to sequentially control the heat dissipation channel and the input/output of the correspondingly connected radiators, and further control the flow of the cooling liquid and the number of the radiators which are input/output to work, so that the heat dissipation power is not required to be changed by frequently adjusting the three-way valve as in the prior art, namely the adjusting workload of the original three-way valve is dispersed to a plurality of valves, the adjusting times of the three-way valve is reduced, and the service life of the three-way valve is prolonged. In addition, in order to avoid the waste of the heat dissipation power of the heat dissipater, the heat dissipation power is adjustable, and the next heat dissipation channel is opened only when the heat dissipation capacity of the previous heat dissipater reaches the maximum value and the heat dissipation requirement cannot be met; in order to reduce the opening/closing times of the valve, the valve of the next heat dissipation channel is closed after the heat dissipation power of the radiator of the previous heat dissipation channel is reduced to the minimum heat dissipation power and the temperature is continuously lower than a target value; meanwhile, the temperature of the cooling liquid flowing through the cooling channel is adjusted by adjusting the cooling power of the radiator, so that the accuracy of temperature control is improved.
Further, in order to improve the accuracy of the temperature control, the heat sink includes a heat dissipation fan, the detection device is a rotational speed sensor for detecting a rotational speed of a motor of the heat dissipation fan, and if the temperature is higher than or lower than the target value, the heat dissipation power is increased/decreased by increasing/decreasing the rotational speed of the heat dissipation fan in the heat sink.
Furthermore, in order to adjust the temperature more quickly and accurately, for the heat dissipation channel with n being more than or equal to 2, the temperature is the temperature of the cooling liquid at the water outlet of the nth heat dissipation channel.
Furthermore, when n is 1, only one heat dissipation channel is opened, and the coolant in the pipeline in the large circulation is the coolant flowing through the 1 st heat dissipation channel, so that for the flexibility of control, for the heat dissipation channel with n being 1, the temperature is the temperature of the coolant at the outlet of the nth heat dissipation channel, or the temperature of the coolant at the inlet of the fuel cell stack, or the temperature of the coolant at the outlet of the fuel cell stack.
Drawings
FIG. 1 is a block diagram of a prior art fuel cell thermal management system;
FIG. 2 is a control flow diagram of a prior art fuel cell thermal management system;
FIG. 3 is a block diagram of a fuel cell thermal management system of the present invention;
fig. 4 is a flowchart of a control method of embodiment 1 of the thermal management system for a fuel cell according to the present invention;
in the figure: 1 is a T1 temperature sensor, 2 is a T2 temperature sensor, 3 is a three-way valve, 4 is a water pump, 5 is a fuel cell stack, 6 is a second radiator, 8 is a first radiator, 7 is a radiator fan controller, 9 is a T4 temperature sensor, 10 is a T3 temperature sensor, and 11 is a second stop valve.
Detailed Description
Fuel cell thermal management system example 1:
the fuel cell thermal management system proposed in the present embodiment, as shown in fig. 3, includes a small-circulation heating loop composed of a fuel cell stack 5, a water pump 4, and a three-way valve 3; and temperature monitoring is realized through a T1 temperature sensor 1 and a T2 temperature sensor 2; the working process of the small circulation is the same as that of the prior art, which is not the improvement point of the invention, and redundant description is not needed here.
The system also comprises a large-circulation cooling loop which is composed of a fuel cell stack 5, a water pump 4, a cooling circulation pipeline, a second radiator 6 and a first radiator 8 which are connected in parallel (the radiators comprise radiator fans, the rotating speed of the radiator fans is controlled by a radiator fan controller 7) and a three-way valve 3, and the connection relation of the hardware is the same as that of the prior art; the large-circulation cooling loop differs from the prior art in that each radiator is connected with a corresponding heat dissipation channel, and a second stop valve 11 (valve for short), a T3 temperature sensor 10, a T4 temperature sensor 9, a rotating speed sensor and control logic in a corresponding main controller are arranged in the heat dissipation channel connected with the second radiator 6.
The specific connection relationship and the function are as follows:
the 1 st heat dissipation channel is connected with a first radiator 8, the 2 nd heat dissipation channel is connected with a second radiator 6, a second stop valve 11 is arranged in the 2 nd heat dissipation channel, a T3 temperature sensor 10 is arranged at a water outlet of the 1 st heat dissipation channel, and a T4 temperature sensor 9 is arranged at a water outlet of the 2 nd heat dissipation channel;
each heat dissipation channel is used for supplying cooling liquid to the fuel cell stack 5; the rotating speed sensor is used for detecting the rotating speed of each cooling fan motor; the T3 temperature sensor 10 is used for detecting the temperature of the cooling liquid flowing through the 1 st heat dissipation channel; the T4 temperature sensor 9 is used for detecting the temperature of the cooling liquid flowing through the 2 nd heat dissipation channel; the second stop valve 11 is used for controlling the connection and disconnection of the 2 nd heat dissipation channel and the fuel cell; t3 temperature sensor 10 is connected to main control unit's input, T4 temperature sensor 9 and speed sensor, main control unit's output end control connection second stop valve 11, judge the control to second stop valve 11 through the temperature information and the radiating power information of receipt in the main control unit, T3 temperature sensor 10 is connected to radiator fan controller 7's input, T4 temperature sensor 9, radiator fan's motor is connected to radiator fan controller 7's output, radiator fan controller 7 can also control radiator fan's rotational speed according to temperature information.
Specifically, the working process of the system is shown in fig. 4:
after the fuel cell system, if the fuel cell is normal and has no fault, the fuel cell is in a running state;
when the fuel cell is running, determining that the second stop valve 11 is in a closed state; the three-way valve 3 can adjust two opening degrees, namely a large circulation opening degree and a small circulation opening degree, so as to control the proportion of the cooling liquid flowing out of the outlet of the fuel cell stack 5 to enter the large circulation and the small circulation. In the initial state, the three-way valve 3 adjusts the small circulation to 100%, and the three-way valve 3 adjusts the large circulation to 0%.
The opening degree of the small circulation is adjusted to be gradually reduced through the three-way valve 3, the opening degree of the large circulation is gradually increased, the large circulation and the small circulation are mixed to run, if the opening degree of the large circulation of the three-way valve 3 is smaller than the set opening degree upper limit (set as 100 percent in the process), the heat radiation fan of the first radiator 8 is not started, and the opening degree of the three-way valve 3 is adjusted to be T1 (the temperature of the cooling liquid at the water inlet of the fuel cell stack 5) or T2 (the temperature of the cooling liquid at the water outlet of the fuel cell stack 5);
if the large-cycle opening degree of the three-way valve 3 is greater than or equal to the set opening degree upper limit 100%, the radiator fan of the first radiator 8 is started to work, and the rotating speed of the radiator fan of the first radiator 8 is subjected to PID (proportion integration differentiation) regulation according to the actual temperature and the target value of the temperature T3 detected by the temperature sensor 10T 3;
if the rotating speed of the cooling fan of the first radiator 8 reaches the maximum, namely 100%, and the actual temperature of T3 is higher than the target value after the duration setting time, controlling the second stop valve 11 in the 2 nd cooling channel to open, and putting the 2 nd cooling channel and the second radiator 6 into use;
the working process of the second radiator 6 is basically the same as that of the first radiator 8, and the rotating speed of a radiating fan of the second radiator 6 is PID-regulated according to the actual temperature and the target value of the temperature T4 detected by the temperature sensor 9 of T4;
if the rotating speed of the cooling fan of the second radiator 6 reaches the maximum and the actual temperature of the T4 is higher than the target value after the continuous set time, performing high-temperature early warning;
correspondingly, if the actual temperature of T3 is lower than the target value after the duration of the setting time after the rotation speed of the radiator fan of the first radiator 8 is minimized after the 2 nd heat dissipation path and the second radiator 6 are put into use, the second stop valve 11 in the 2 nd heat dissipation path is controlled to close, and the 2 nd heat dissipation path and the second radiator 6 are taken out of use.
The main function of the heat dissipation channel in the above embodiment is to control the connection between the second heat sink 6 and the fuel cell stack 5 through the second stop valve 11 without changing the structure of the heat sink, so that the second heat sink 6 is connected to the 2 nd heat dissipation channel, which is equivalent to extending the heat dissipation channel to the outside of the second heat sink 6, and the second stop valve 11 is disposed at a position easy to control, and the heat dissipation channel may be made of a heat dissipation material or a non-heat dissipation material, as long as the coolant cooled by the second heat sink 6 can be transmitted to the fuel cell stack 5. Of course, in other embodiments, the shutoff valve may be provided in the heat dissipation channel inside the radiator, in which case the heat dissipation channel is connected inside the radiator, regardless of the complexity of the process.
In the above embodiment, the system includes two radiators connected in parallel, the 1 st heat dissipation channel is the 1 st heat dissipation channel in use, and the 2 nd heat dissipation channel is the 2 nd heat dissipation channel in use, then for a system of three radiators connected in parallel, in case the 2 nd heat dissipation channel and the second heat sink 6 connected correspondingly thereto cannot satisfy the heat dissipation requirement, the 3 rd heat dissipation channel is continuously opened, and similarly, the meaning of the 3 rd heat dissipation channel is the 3 rd heat dissipation channel which is put into use, and so on, in the system with n +1 radiators connected in parallel, when the nth radiating channel and the radiator connected with the nth radiating channel correspondingly cannot meet the radiating requirement, and opening the stop valve in the (n + 1) th heat dissipation channel to enable the (n + 1) th heat dissipation channel and the radiator correspondingly connected with the n +1 th heat dissipation channel to be put into use, and similarly, the meaning of the (n) th heat dissipation channel is the (n) th heat dissipation channel put into use. Correspondingly, the exiting sequence of the heat dissipation channels is that the last heat dissipation channel which is put in exits first, and the exiting is carried out according to the reverse sequence of the putting sequence.
The heat dissipation channels and the radiators correspondingly connected with the heat dissipation channels can be put in/out according to a set sequence, and particularly the heat dissipation channels are numbered according to the radiators, so that disorder control can be avoided, the radiators can work orderly and reliably, and the positions of the radiators can be found out in time if the radiators break down.
In this embodiment, the temperature sensor for detecting the temperature of the coolant flowing through the 1 st heat dissipation channel is a T3 temperature sensor 10, the temperature sensor for detecting the temperature of the coolant flowing through the 2 nd heat dissipation channel is a T4 temperature sensor 9, and the positions are as shown in fig. 3 and are all set at the positions corresponding to the water outlets of the heat dissipation channels, so that the temperature of the coolant can be adjusted more quickly and accurately. As can be seen from the figure, when the 1 st heat dissipation channel is put in, the coolant flowing through the 1 st heat dissipation channel flows through the coolant in the whole circulation line, and therefore, as another embodiment, the position of the temperature sensor for detecting the temperature of the coolant flowing through the 1 st heat dissipation channel may be the temperature of the coolant at the water inlet of the fuel cell stack 5 or the temperature of the coolant at the water outlet of the fuel cell stack 5, that is, the position of the T1 temperature sensor 1 or the T2 temperature sensor 2. And if the temperature is not considered to be rapidly adjusted, the temperature sensor at the water outlet of the heat dissipation channel can be arranged at the water inlet of the heat dissipation channel or at other positions such as the middle of the heat dissipation channel, and the invention is not limited to this.
In this embodiment, the target values of the coolant temperatures at the T3 temperature sensor 10 and the T4 temperature sensor 9 are the same, and the target values of the coolant temperatures at the T1 temperature sensor 1 are the same, but in another embodiment, the coolant is prevented from generating heat during flowing, and the target values of the coolant temperatures at the T3 temperature sensor 10 and the T4 temperature sensor 9 may be slightly lower than the target values of the coolant temperatures at the T1 temperature sensor 1.
As shown in fig. 3, the second cutoff valve 11 is closed, and the 2 nd heat dissipation channel is disconnected from the fuel cell; the second cut-off valve 11 is opened and the 2 nd heat dissipation channel communicates with the fuel cell. In this embodiment, in order to practice thrift the cost, in order to guarantee 1 st heat dissipation channel moreover to and the first radiator 8 of being connected rather than corresponding can in time come into operation, do not set up the stop valve in 1 st heat dissipation channel, as other implementation modes, also can set up the stop valve in 1 st heat dissipation channel, in time open when the macrocycle starts, or open all the time. Similarly, if the number of the radiators is more, all the radiating channels can be provided with stop valves; or the 1 st heat dissipation channel is not provided with a stop valve, and other heat dissipation channels are arranged, and the invention is not limited.
In this embodiment, after the radiator is put into operation, the rotation speed of the cooling fan is PID-adjusted by the difference between the actual temperature measured by the corresponding temperature sensor and the target value between the minimum rotation speed and the maximum rotation speed, for example: when the first heat sink 8 is put into use, if the actual temperature detected by the T3 temperature sensor 10 is greater than the target value, the rotation speed of the heat dissipation fan is increased to increase the heat dissipation power of the first heat sink 8 to meet the heat dissipation requirement, and if the actual temperature detected by the T3 temperature sensor 10 is less than the target value, the rotation speed of the heat dissipation fan is decreased to decrease the heat dissipation power of the first heat sink 8. However, the heat dissipation of the heat sink generally includes radiation heat dissipation and convection heat dissipation, and the heat dissipation power is the heat dissipation amount of the heat sink in unit time, and increasing the heat dissipation power, i.e. increasing the work of the heat sink, therefore, as other embodiments, the heat dissipation power may also be increased/decreased by increasing/decreasing the rotation speed of the water pump 4 in the circulation pipeline, and similarly, the detection device for the heat dissipation power of the heat sink may also be the rotation speed sensor of the water pump 4, and a heat sink that does not employ a heat dissipation fan, such as a heat pipe heat sink, a water-cooled heat sink, etc., may also be used.
In this embodiment, the control of the second stop valve 11 and the control of the rotational speed of each radiator fan are controlled by two independent controllers, namely, the main controller and the radiator fan controller 7, and as another embodiment, the control may be performed by one controller.
For a thermal management system of a controller, the controller includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor implements a control method of the thermal management system of the fuel cell when executing the computer program. In summary, the control method can be summarized as that the heat dissipation channels and the heat sinks correspondingly connected to the heat dissipation channels are put into/taken out of use in sequence according to a set sequence, and the putting into/taking out of use process includes the following steps:
(1) acquiring the temperature of the cooling liquid flowing through the nth heat dissipation channel and acquiring the heat dissipation power of the heat sink corresponding to the nth heat dissipation channel; performing PID adjustment on the heat dissipation power of the radiator between the minimum heat dissipation power and the maximum heat dissipation power according to the difference value between the temperature and the target value;
(2) and if the heat dissipation power is increased/reduced to the maximum/minimum heat dissipation power and the temperature is higher/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected heat radiator into/out of use.
The method disperses the adjusting workload of the original three-way valve 3 into a plurality of heat dissipation channels provided with the stop valves and the radiators correspondingly connected with the heat dissipation channels, reduces the adjusting times of the three-way valve 3 and prolongs the service life of the three-way valve 3.
Fuel cell thermal management system example 2:
the difference between the fuel cell thermal management system provided in this embodiment and embodiment 1 is that in this embodiment, it is not necessary to collect the magnitude of the heat dissipation power of the heat sink and adjust the heat dissipation power of the heat sink, that is, it is not necessary to use a detection device, and the heat sink operates with a fixed heat dissipation power. Other structural components and connection relationships of the fuel cell thermal management system are the same as those in embodiment 1, and are not described herein again.
The structural change of the fuel cell thermal management system in the present embodiment cannot be seen from fig. 3, but due to the structural change of the fuel cell thermal management system, the control method of the fuel cell thermal management system is correspondingly different. The operation of the fuel cell thermal management system in this embodiment will be described here with reference to fig. 3, and the operation of this embodiment is largely the same as that in embodiment 1, except that:
after the fuel cell starts a large cycle, the 1 st heat dissipation channel and the first radiator 8 are put into use;
if the opening degree of the three-way valve 3 is larger than or equal to the set opening degree upper limit, the cooling fan of the first radiator 8 is started to work at a fixed rotating speed;
when the actual temperature of the T3 is higher than the target value after the continuous set time, controlling the second stop valve 11 in the 2 nd heat dissipation channel to be opened, and putting the 2 nd heat dissipation channel and the second radiator 6 into use; the radiator fan of the second radiator 6 is also started to work at a fixed rotating speed;
when the actual temperature of T3 is lower than the target value after the duration of the set time, the second cut-off valve 11 in the 2 nd heat dissipation channel is controlled to close, and the 2 nd heat dissipation channel and the second radiator 6 are taken out of use.
It can be seen that the controller directly determines whether to put in/withdraw from the next heat dissipation channel and the radiator connected to the next heat dissipation channel according to the magnitude of the actual temperature and the target value collected by the temperature sensor, specifically, the control method of the fuel cell thermal management system in this embodiment can be summarized as follows: the method comprises the following steps of sequentially putting a plurality of heat dissipation channels and radiators correspondingly connected with the heat dissipation channels into use or quitting use according to a set sequence, wherein the putting into use or quitting use process comprises the following steps:
(1) acquiring the temperature of the cooling liquid flowing through the nth heat dissipation channel;
(2) and if the temperature is higher than/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected radiator into/out of use.
Control method of fuel cell thermal management system embodiment 1:
the control method of the fuel cell thermal management system proposed in this embodiment is based on the structure in the fuel cell thermal management system embodiment 1, and the control method in the fuel cell thermal management system embodiment 1 is the same as the control method in this embodiment:
the method comprises the following steps of sequentially putting a plurality of heat dissipation channels and radiators correspondingly connected with the heat dissipation channels into or out of use according to a set sequence, wherein the heat dissipation channels comprise nth and (n + 1) th heat dissipation channels, n is greater than 1, the heat dissipation channels are used for providing cooling liquid for a fuel cell stack, valves are arranged in the heat dissipation channels and used for controlling the connection and disconnection of the heat dissipation channels and the fuel cell, and the putting into or out of use process comprises the following steps:
(1) acquiring the temperature of the cooling liquid flowing through the nth heat dissipation channel and acquiring the heat dissipation power of the heat sink corresponding to the nth heat dissipation channel; performing PID adjustment on the heat dissipation power of the radiator between the minimum heat dissipation power and the maximum heat dissipation power according to the difference value between the temperature and the target value;
(2) and if the heat dissipation power is increased/reduced to the maximum/minimum heat dissipation power and the temperature is higher/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected heat radiator into/out of use.
The specific implementation process of the control method of the fuel cell thermal management system is described in the above embodiment 1 of the fuel cell thermal management system, and is not described herein again.
Control method of fuel cell thermal management system embodiment 2:
the control method of the fuel cell thermal management system proposed in this embodiment is based on the structure in the fuel cell thermal management system embodiment 2, and the control method in the fuel cell thermal management system embodiment 2 is the same as the control method in this embodiment:
the method comprises the following steps of sequentially putting a plurality of heat dissipation channels and radiators correspondingly connected with the heat dissipation channels into or out of use according to a set sequence, wherein the heat dissipation channels comprise nth and (n + 1) th heat dissipation channels, n is greater than 1, the heat dissipation channels are used for providing cooling liquid for a fuel cell stack, valves are arranged in the heat dissipation channels and used for controlling the connection and disconnection of the heat dissipation channels and the fuel cell, and the putting into or out of use process comprises the following steps:
(1) acquiring the temperature of the cooling liquid flowing through the nth heat dissipation channel;
(2) and if the temperature is higher than/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected radiator into/out of use.
The specific implementation process of the control method of the fuel cell thermal management system is described in the foregoing embodiment 2 of the fuel cell thermal management system, and is not described herein again.
Claims (10)
1. A control method of a fuel cell thermal management system is characterized in that a plurality of heat dissipation channels and a radiator correspondingly connected with the heat dissipation channels are put into or taken out of use in sequence according to a set sequence, the plurality of heat dissipation channels comprise an nth heat dissipation channel and an n +1 th heat dissipation channel, n is larger than 1, the heat dissipation channels are used for providing cooling liquid for a fuel cell stack, valves are arranged in the heat dissipation channels and are used for controlling the connection and disconnection of the heat dissipation channels and a fuel cell, and the putting-in/taking-out of use process comprises the following steps:
(1) acquiring the temperature of the cooling liquid flowing through the nth heat dissipation channel;
(2) and if the temperature is higher than/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected radiator into/out of use.
2. The control method of the fuel cell thermal management system according to claim 1, wherein the temperature is the temperature of the coolant at the outlet of the nth heat dissipation channel for the heat dissipation channel with n being greater than or equal to 2.
3. The control method of the fuel cell thermal management system according to claim 1, wherein for the heat dissipation channel with n-1, the temperature is the temperature of the coolant at the water outlet of the 1 st heat dissipation channel, or the temperature of the coolant at the water inlet of the fuel cell stack, or the temperature of the coolant at the water outlet of the fuel cell stack.
4. A control method of a fuel cell thermal management system is characterized in that a plurality of heat dissipation channels and a radiator correspondingly connected with the heat dissipation channels are put into or taken out of use in sequence according to a set sequence, the plurality of heat dissipation channels comprise an nth heat dissipation channel and an n +1 th heat dissipation channel, n is larger than 1, the heat dissipation channels are used for providing cooling liquid for a fuel cell stack, valves are arranged in the heat dissipation channels and are used for controlling the connection and disconnection of the heat dissipation channels and a fuel cell, and the putting-in/taking-out of use process comprises the following steps:
(1) acquiring the temperature of cooling liquid flowing through the nth heat dissipation channel and acquiring the heat dissipation power of a heat sink correspondingly connected with the nth heat dissipation channel; performing PID adjustment on the heat dissipation power of the radiator between the minimum heat dissipation power and the maximum heat dissipation power according to the difference value between the temperature and the target value;
(2) and if the heat dissipation power is increased/reduced to the maximum/minimum heat dissipation power and the temperature is higher/lower than the target value after the continuous set time, controlling the valve of the (n + 1) th heat dissipation channel to be opened/closed, and putting the (n + 1) th heat dissipation channel and the correspondingly connected heat radiator into/out of use.
5. The control method of the fuel cell thermal management system according to claim 4, wherein the radiator includes a radiator fan, and the radiation power is increased/decreased by increasing/decreasing a rotation speed of the radiator fan in the radiator.
6. The control method of the fuel cell thermal management system according to claim 4, wherein the temperature is the temperature of the coolant at the outlet of the nth heat dissipation channel for the heat dissipation channel with n being greater than or equal to 2.
7. The control method of the fuel cell thermal management system according to claim 4, wherein for the heat dissipation channel with n being 1, the temperature is the temperature of the coolant at the outlet of the nth heat dissipation channel, or the temperature of the coolant at the inlet of the fuel cell stack, or the temperature of the coolant at the outlet of the fuel cell stack.
8. The utility model provides a fuel cell thermal management system, includes the cooling circulation pipeline, is arranged in controlling the three-way valve of coolant liquid flow among the cooling circulation pipeline and a plurality of radiators of parallelly connected, its characterized in that, every radiator all connects corresponding heat dissipation channel, and the heat dissipation channel that a plurality of radiators are connected includes nth and n +1 heat dissipation channel, and n is greater than 1, and heat dissipation channel is used for providing the coolant liquid to the fuel cell pile, still includes:
the temperature sensor is used for detecting the temperature of the cooling liquid flowing through each heat dissipation channel;
the valve is arranged in the heat dissipation channel and used for controlling the connection and disconnection of the heat dissipation channel and the fuel cell;
a controller having an input connected to the temperature sensor and an output connected to the valve, the controller comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor executing the method of controlling the fuel cell thermal management system according to any of claims 1-3 when executing the computer program.
9. The utility model provides a fuel cell thermal management system, includes the cooling circulation pipeline, is arranged in controlling the three-way valve of coolant liquid flow among the cooling circulation pipeline and a plurality of radiators of parallelly connected, its characterized in that, every radiator all connects corresponding heat dissipation channel, and the heat dissipation channel that a plurality of radiators are connected includes nth and n +1 heat dissipation channel, and n is greater than 1, and heat dissipation channel is used for providing the coolant liquid to the fuel cell pile, still includes:
the detection device is used for detecting the heat dissipation power of each radiator;
the temperature sensor is used for detecting the temperature of the cooling liquid flowing through each heat dissipation channel;
the valve is arranged in the heat dissipation channel and used for controlling the connection and disconnection of the heat dissipation channel and the fuel cell;
a controller, an input end of the controller is connected with the temperature sensor and the detection device, an output end of the controller controls the connection valve and the radiator, the controller comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, and the processor executes the control method of the fuel cell thermal management system according to any one of claims 4, 6 and 7 when executing the computer program.
10. The fuel cell thermal management system according to claim 9, wherein the radiator includes a radiator fan, and the detecting means is a rotational speed sensor for detecting a rotational speed of a radiator fan motor, and if the temperature is higher/lower than the target value, the heat radiation power is increased/decreased by increasing/decreasing the rotational speed of the radiator fan in the radiator.
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