CN113725460A - High-power fuel cell engine temperature management system and control method thereof - Google Patents
High-power fuel cell engine temperature management system and control method thereof Download PDFInfo
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- CN113725460A CN113725460A CN202010449264.0A CN202010449264A CN113725460A CN 113725460 A CN113725460 A CN 113725460A CN 202010449264 A CN202010449264 A CN 202010449264A CN 113725460 A CN113725460 A CN 113725460A
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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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
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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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- 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 temperature management system of a high-power fuel cell engine and a control method thereof, the system comprises an electric pile, a flow distribution module, a multi-module heat dissipation device, a heating module, a water pump and a controller, wherein a coolant outlet end of the electric pile is communicated with the flow distribution module, the flow distribution module is also communicated with the multi-module heat dissipation device and the heating module respectively, one end of the water pump is connected with a coolant inlet end of the electric pile, the other end of the water pump is connected with the multi-module heat dissipation device and the heating module respectively, a pressure sensor and a temperature sensor are arranged at the coolant inlet end of the electric pile, a temperature sensor is also arranged at the coolant outlet end of the electric pile, the pressure sensor and the temperature sensor are both connected with the controller, the controller controls the opening and closing of the multi-module heat dissipation device and the heating module through signals of the pressure sensor and the temperature sensor, and the opening degrees of the flow distribution module and the water pump are adjusted. The system temperature control strategy is more flexible; and the temperature control of the invention is more accurate.
Description
Technical Field
The invention relates to the field of fuel cell engines, in particular to a temperature management system of a high-power fuel cell engine and a control method thereof.
Background
Under the dual pressure of energy and environment, fuel cell vehicles are the direction of development of the automotive industry in the future, and are also the focus of research in the automotive field. During the research and development of fuel cell vehicles, the operating temperature of the fuel cell engine has a critical impact on the efficiency and life of the stack. Also, as the power level of a fuel cell engine increases, the difficulty of managing its temperature also increases. Particularly in automotive environments, ambient temperature, vehicle operating speed, and the power of the fuel cell engine itself can all vary over a wide range, which all contribute to the difficulty of accurate temperature management. On the one hand, fuel cell engines often require different temperature management strategies under different environmental conditions and engine operating powers; on the other hand, the temperature management system of the fuel cell engine needs to optimize its structure to match with diversified temperature management strategies.
Disclosure of Invention
In order to solve the above technical problems, a first object of the present invention is to provide a high power fuel cell engine temperature management system, which can achieve both rapid temperature rise of a fuel cell stack and heat dissipation of the fuel cell stack, and a second object of the present invention is to provide a control method of the above system.
In order to achieve the first object, the invention adopts the following technical scheme:
a temperature management system of a high-power fuel cell engine comprises an electric pile, a flow distribution module, a multi-module radiating device, a heating module, a water pump and a controller, wherein a coolant outlet end of the electric pile is communicated with the flow distribution module, the flow distribution module is also communicated with the multi-module radiating device and the heating module respectively, one end of the water pump is connected with a coolant inlet end of the electric pile, the other end of the water pump is connected with the multi-module radiating device and the heating module respectively, a pressure sensor and a temperature sensor are arranged at the coolant inlet end of the electric pile, a temperature sensor is also arranged at the coolant outlet end of the electric pile, the pressure sensor and the temperature sensor are both connected with the controller, the controller is also connected with the flow distribution module, the multi-module radiating device, the heating module and the water pump, and the controller controls the multi-module radiating device and the heating module to be switched on and off through signals of the pressure sensor and the temperature sensor, and the opening degrees of the flow distribution module and the water pump are adjusted.
Preferably, the multi-module water pump further comprises a coolant flow storage module, an ion concentration sensor and a deionizer, wherein the ion concentration sensor is arranged at the coolant outlet end of the electric pile, the coolant flow storage module is connected between the coolant outlet end of the electric pile and the other end of the water pump, and the deionizer is arranged between the coolant flow storage module and the multi-module heat sink.
Preferably, the multi-module heat dissipation device comprises a frame body, fans, heat conducting fins and coolant flow channels, wherein the coolant flow channels are arranged on the frame body at intervals, the heat conducting fins are arranged between adjacent coolant flow channels, and the fans which are started and stopped independently are arranged on the frame body and are positioned on one side of the coolant flow channels.
Preferably, the flow distribution module is a three-way valve including a valve body and a valve core, the valve body is provided with a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline form a main flow passage, the first pipeline and the third pipeline form an auxiliary flow passage, the valve core includes an adjusting shaft and a covering wall surface which are connected with each other, and the covering wall surface is driven by rotation of the adjusting shaft to block and partially block the main flow passage or the auxiliary flow passage.
As a preferred scheme, the controller comprises a power module, a signal acquisition module, an execution signal generation module and a processing module connected with the power module and the signal acquisition module, wherein the power module supplies power to the processing module, and the processing module performs calculation processing according to data of the signal acquisition module and controls the multi-module heat dissipation device, the heating module, the flow distribution module and the water pump through the execution signal generation module.
As a preferred scheme, the vehicle temperature monitoring system further comprises an environment monitor, wherein the environment monitor comprises an environment temperature acquisition module and an information interaction module, the environment temperature acquisition module transmits the temperature information obtained by processing to the information interaction module, and the information interaction module receives and processes the temperature information and the vehicle speed information and transmits the processing result to the controller.
Preferably, the signal of the environment monitor, the signal of the pressure sensor and the signal of the temperature sensor are input signals of a controller.
As a preferred scheme, the controller comprises a communication module, a power module, a signal acquisition module, an execution signal generation module and a processing module connected with the communication module, the power module supplies power to the processing module, the communication module communicates with the environment monitor through a CAN protocol, and the processing module performs calculation processing according to data of the signal acquisition module and the communication module and controls the multi-module heat dissipation device, the heating module, the flow distribution module and the water pump through the execution signal generation module.
In order to achieve the second object, the invention adopts the following technical scheme:
a control method of a temperature management system of a high-power fuel cell engine adopts the system and comprises the following steps:
1) the controller judges whether the galvanic pile is in a starting process or a normal operation process according to the temperature of the galvanic pile, and the system enters corresponding auxiliary heating control or heat dissipation control;
2) if the system is in auxiliary heating control: when the temperature of the galvanic pile is lower than the working temperature, the controller controls the flow distribution module to enable all the coolant to enter the heating module, the coolant circulates in a loop where the heating module is located through the water pump, the controller opens the heating module to enable the temperature of the galvanic pile to be rapidly raised to the expected working temperature, when the temperature of the galvanic pile reaches the working temperature, the controller closes the heating module and adjusts the flow distribution module again to enable the coolant to enter the loop where the multi-module heat dissipation device is located and the loop where the heating module is located in proportion, and the coolant circulates in the system through the water pump to meet the system requirements;
3) and if the system is in heat dissipation control: the controller obtains the power of the galvanic pile, calculates the flow of the coolant according to the expected temperature value of the coolant inlet and outlet end of the galvanic pile and the heat-generating power of the galvanic pile, and adjusts the opening of the water pump; the controller calculates the minimum heat dissipation capacity of the multi-module heat dissipation device;
if the minimum heat dissipation capacity of the multi-module heat dissipation device is still larger than the heat dissipation requirement of the system; the controller adjusts the flow distribution module to enable the coolant to enter a loop where the multi-module heat dissipation device is located and a loop where the heating module is located in proportion; at the moment, the heating module is closed, and the coolant circulates in the system through the water pump, so that the heat dissipation requirement of the system is met;
if the minimum heat dissipation capacity of the multi-module heat dissipation device is smaller than the heat dissipation requirement of the system; the controller adjusts the flow distribution module so that the coolant completely enters the multi-module heat sink; the controller further improves the heat dissipation capability of the multi-module heat dissipation device, so that the heat dissipation requirement of the system is met.
Preferably, the multi-module heat dissipation device comprises a plurality of fans, and the controller adjusts the heat dissipation capacity of the multi-module heat dissipation device by controlling the number of the fans and the opening degree of each fan.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the flow distribution module is adjusted by the controller, so that the coolant flowing out of the galvanic pile can flow into the multi-module heat dissipation device and the heating module in proportion according to the heat dissipation requirement and then flows into the galvanic pile for circulation, when the galvanic pile is started in an auxiliary manner, the flow distribution module enables the coolant to flow into the heating module completely, the effect of rapidly heating the fuel cell pile is realized, and when the galvanic pile dissipates heat, a circulation pipeline of the coolant can be selected according to the requirement, so that the system temperature control strategy is more flexible; signals of a pressure sensor and a temperature sensor arranged at the inlet and outlet ends of the coolant of the galvanic pile are used as the control basis of the controller, so that the opening degrees of the multi-module heat dissipation device, the heating module, the flow distribution module and the water pump can be more accurately adjusted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the system architecture of the present invention;
FIG. 2 is a schematic diagram of the controller of the present invention;
FIG. 3 is a schematic diagram of the environment monitor of the present invention;
FIG. 4 is a schematic diagram of a multi-module heat sink of the present invention;
FIG. 5 is a schematic cross-sectional view of a flow distribution module of the present invention;
FIG. 6 is a schematic view of the valve cartridge of the flow distribution module of the present invention;
FIG. 7 is a schematic flow chart of the supplemental heat control process of the present invention;
fig. 8 is a flowchart illustrating a heat dissipation control process according to the present invention.
Wherein reference numeral 1, a galvanic pile; 2. a coolant flux storage module; 3. a water pump; 4. a multi-module heat sink; 41. a fan; 42. a heat conductive sheet; 43. a coolant flow passage; 5. a heating module; 6. a flow distribution module; 61. a valve body; 62. a first pipeline; 63. a second pipeline; 64. a third pipeline; 65. a valve core; 7. a controller; 71. a processing module; 72. a communication module; 73. a power supply module; 74. a signal acquisition module; 75. an execution signal generation module; 8. an environmental monitor; 81. an ambient temperature acquisition module; 82. an information interaction module; 9. a deionizer; 10. a pressure sensor; 11. a temperature sensor; 12. an ion concentration sensor.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.
Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The invention will be further illustrated with reference to the following examples and drawings:
the embodiment provides a temperature management system of a high-power fuel cell engine, as shown in fig. 1, comprising an electric pile 1, a flow distribution module 6, a multi-module heat sink 4, a heating module 5, a water pump 3, a controller 7, a controller, and a controller, wherein each actuator is adjusted according to information of each sensor in the temperature management system and the state of the actuator; the sensors include, but are not limited to, a pressure sensor 10 and a temperature sensor 11, and the actuators include, but are not limited to, a multi-module heat sink 4, a heating module 5, a flow distribution module 6, and a water pump 3; the coolant outlet end of the electric pile 1 is communicated with a flow distribution module 6, the flow distribution module 6 is also respectively communicated with a multi-module heat dissipation device 4 and a heating module 5, one end of the water pump is connected with the coolant inlet end of the galvanic pile 1, the other end is respectively connected with the multi-module heat dissipation device 4 and the heating module 5, a pressure sensor 10 and a temperature sensor 11 are arranged at the coolant inlet end of the galvanic pile 1, a temperature sensor 11 is also arranged at the coolant outlet end of the galvanic pile 1, the pressure sensor 10 and the temperature sensor 11 are both connected with the controller 7, the controller 7 is also connected with the flow distribution module 6, the multi-module heat dissipation device 4, the heating module 5 and the water pump 3, the controller 7 controls the multi-module heat dissipation device 4 and the heating module 5 to be switched on and off according to signals of the pressure sensor 10 and the temperature sensor 11, and adjusts the opening degrees of the flow distribution module 6 and the water pump 3.
The water pump in the invention is generally a vehicle centrifugal water pump which is used for controlling the flow of the coolant so as to adjust the temperature difference of the inlet and the outlet of the coolant of the galvanic pile; the heating module is a pipeline type PTC heater and is used for heating the coolant so as to accelerate the start process of the pile; the temperature sensor is a thermal resistor or thermocouple type temperature sensor and is used for monitoring the temperature of the coolant at the inlet and the outlet of the galvanic pile; the pressure sensor is a pressure strain gauge type pressure sensor and is used for monitoring the pressure of the coolant at the inlet of the galvanic pile;
the system further comprises a cooling flow storage module 2, an ion concentration sensor 12 and a deionizer 9, wherein the ion concentration sensor 12 is arranged at the coolant outlet end of the electric pile 1, the coolant flow storage module 2 is connected between the coolant outlet end of the electric pile 1 and the other end of the water pump 1, and the deionizer 9 is arranged between the coolant flow storage module 2 and the multi-module heat dissipation device 4. A deionizer for removing excess conductive ions in the coolant to maintain the coolant conductivity within a safe range; and the coolant flow storage module selects the auxiliary water tank for the vehicle and is used for storing a certain amount of coolant, so that the coolant lost due to leakage of part of node coolant in the operation process of the system is supplemented. The ion concentration sensor 12, which is an electrode conductivity tester, is used to monitor the conductivity of the coolant in the cooling circuit of the stack.
As shown in fig. 4, the multi-module heat dissipation device is used for dissipating heat generated during the operation of the stack to the external environment; the multi-module heat dissipation device 4 comprises a frame body, a fan 41, heat-conducting fins 42 and coolant flow channels 43, wherein the plurality of coolant flow channels 43 are arranged on the frame body at intervals, the coolant circulates in the coolant flow channels 43, the plurality of heat-conducting fins 42 are arranged between the adjacent coolant flow channels 43 and are in heat conduction with the coolant flow channels, the contact area of the radiator and the environment is increased, and the heat dissipation efficiency is improved; a plurality of individually on-off fans 41 are disposed on the frame body at one side of the coolant flow passage 43. Each fan can be controlled by the controller to switch and rotate.
As shown in fig. 5 and 6, a flow distribution module for controlling the proportion of the flow of coolant through the heating modules and the multi-module heat sinks; the flow distribution module 6 is a three-way valve and comprises a valve body 61 and a valve core 65, a first pipeline 62, a second pipeline 63 and a third pipeline 64 are arranged on the valve body 61, the first pipeline 62 and the second pipeline 63 form a main flow passage, the first pipeline 62 and the third pipeline 64 form a secondary flow passage, and the main flow passage is communicated with an outlet of the stack and an inlet of the multi-module heat dissipation device; the secondary flow passage is communicated with the outlet of the electric pile to the inlet of the heating module; the valve body 65 includes an adjustment shaft and a cover wall surface connected to each other, and the cover wall surface is driven by rotation of the adjustment shaft to block or partially block the main flow passage or the sub-flow passage, thereby adjusting the opening degrees of the main flow passage and the sub-flow passage to control the ratio of the coolant flowing through the main flow passage and the sub-flow passage.
As shown in fig. 3, the present invention further includes an environment monitor 8, wherein the environment monitor 8 includes an environment temperature acquisition module 81 and an information interaction module 82, and the environment temperature acquisition module 81 acquires the ambient temperature around the fuel cell engine through a thermistor type environment temperature sensor disposed near the multi-module heat sink; the ambient temperature obtaining module 81 transmits the processed temperature information to the information interaction module 82, and the information interaction module 82 receives the processed temperature information and the vehicle speed information and transmits the processed result to the controller. The signal of the environment monitor 8, the signal of the pressure sensor 10 and the signal of the temperature sensor 11 are input signals of the controller 7. And the environment monitor is used for acquiring environment temperature information in the running process of the fuel cell engine, estimating the natural wind speed blowing to the multi-module radiating module according to the running speed of the vehicle, and providing the information to the controller for decision support.
As shown in fig. 2, the controller 7 includes a communication module 72, a power module 73, a signal acquisition module 74, an execution signal generation module 75, and a processing module 71 connected to the above modules, where the power module 73 supplies power to the processing module 71, the communication module 72 communicates with the environment monitor 8 through a CAN protocol, and the processing module 71 performs calculation processing according to data of the signal acquisition module 74 and the communication module 72, and then controls the multi-module heat sink 4, the heating module 5, the flow distribution module 6, and the water pump 3 through the execution signal generation module 75.
The signal acquisition module in the controller: directly collecting signals of a pressure sensor, a temperature sensor and a conductivity tester; a communication module: the vehicle driving speed and the environmental temperature information are obtained through CAN protocol communication with an environmental monitoring module; a processing module: 1, estimating the heat dissipation capacity of the multi-module heat dissipation device under the condition that the multi-module fan is completely closed through the ambient temperature of the fuel cell engine, the vehicle running speed and the coolant flow; 2, estimating the coolant flow required by the galvanic pile according to the operating condition point of the galvanic pile and the coolant inlet temperature; 3 calculating the heat dissipation requirement of the temperature management system according to the outlet temperature of the coolant, the expected inlet temperature of the coolant and the flow rate of the coolant; 4 estimating the heat dissipation capacity of different heat dissipation fan combinations according to the ambient temperature of the fuel cell engine; 5 calculating the expected opening degree of the water pump according to the expected value of the temperature at the inlet and the outlet of the coolant and the heat generation power of the galvanic pile; an execution signal generation module: generating control signals of each actuator according to the calculation result of the processing module, comprising: generating a control signal of a flow regulating module flow regulating part through a PWM signal output part, and regulating the opening degrees of a main flow passage and a secondary flow passage to control the proportion of coolant flowing through the main flow passage and the secondary flow passage; generating an enable signal of each fan of the multi-module heat dissipation device through the digital signal output part and generating an opening control signal of each fan through the PWM signal output part; the heat dissipation capacity of the radiator is accurately adjusted; generating a control signal of the water pump through a PWM signal output part, and adjusting the flow of the coolant; and generating a control signal of the heating module through the digital signal output part, and controlling whether the heating module works or not.
As shown in fig. 7 and 8, a control method of a temperature management system of a high-power fuel cell engine adopts the above system and comprises the following steps:
1. the controller 7 judges whether the galvanic pile 1 is in a starting process or a normal operation process according to the temperature of the galvanic pile 1, and the system enters corresponding auxiliary heating control or heat dissipation control;
2. if the system is in auxiliary heating control: when the temperature of the electric pile 1 is lower than the working temperature, the controller 7 controls the flow distribution module 6 to enable all the coolant to enter the heating module 5, the coolant circulates in a loop where the heating module 5 is located through the water pump 3, the controller 7 opens the heating module 5 to enable the temperature of the electric pile 1 to be rapidly increased to the expected working temperature, when the temperature of the electric pile 1 reaches the working temperature, the controller 7 closes the heating module, and adjusts the flow distribution module 6 again to enable the coolant to enter the loop where the multi-module heat dissipation device 4 is located and the loop where the heating module 5 is located in proportion, and the coolant circulates in the system through the water pump 3 to meet the system requirements;
3. if the system is in heat dissipation control: the controller 7 obtains the power of the galvanic pile 1, calculates the coolant flow according to the expected temperature value of the coolant inlet and outlet ends of the galvanic pile 1 and the heat generation power of the galvanic pile 1, and adjusts the opening degree of the water pump 3; the controller 7 calculates the minimum heat dissipation capacity of the multi-module heat dissipation device 4;
if the minimum heat dissipation capability of the multi-module heat dissipation device 4 is still greater than the heat dissipation requirement of the system; the controller 7 adjusts the flow distribution module 6 so that the coolant proportionally enters the circuit in which the multi-module heat sink 4 is located and the circuit in which the heating module 5 is located; at the moment, the heating module 5 is closed, and the coolant circulates in the system through the water pump 3, so that the heat dissipation requirement of the system is met;
if the minimum heat dissipation capacity of the multi-module heat dissipation device 4 is smaller than the heat dissipation requirement of the system; the controller 7 adjusts the flow distribution module 6 so that the coolant entirely enters the multi-module heat sink 4; the controller 7 further increases the heat dissipation capability of the multi-module heat dissipation device 4, so that the heat dissipation requirement of the system is met.
The multi-module heat sink 4 includes a plurality of fans 41, and the controller 7 adjusts the heat dissipation capability of the multi-module heat sink 4 by controlling the number of fans to be turned on and the opening degree of each fan.
The system is divided into the following two working conditions in a heat dissipation working mode according to the relation between heat dissipation requirements and heat dissipation capacity: under the working condition I, the heat dissipation capacity of the multi-module fan under the condition of complete closing is still greater than the heat dissipation requirement of the temperature management system; and under the working condition II, the heat dissipation capacity of the multi-module fan under the condition of complete closing is smaller than the heat dissipation requirement of the temperature management system.
The control mode of the working condition I is as follows: calculating the expected opening degree of the water pump according to the expected value of the temperature of the coolant inlet and outlet and the heat generation power of the electric pile, and outputting an adjusting signal of the water pump through an execution signal generating part of the controller. According to the heat dissipation requirement of the heat management system, the expected proportion of the coolant flow flowing through the main flow passage and the auxiliary flow passage of the flow distribution module is calculated by integrating the coolant inlet temperature, the coolant outlet temperature and the heat dissipation capacity of the multi-module heat dissipation device under the condition that the multi-module fan is completely closed, and the execution signal generation part of the controller outputs the adjusting signal of the coolant flow distribution module.
And the control mode of the working condition II is as follows: calculating the expected opening degree of a water pump according to the expected value of the temperature of a coolant inlet and outlet and the heat generation power of a galvanic pile, and outputting an adjusting signal of the water pump through an execution signal generating part of a controller; outputting an adjusting signal of the coolant flow distribution module through an execution signal generating part of the controller to close the secondary flow passage, and enabling all the coolant to flow to the multi-module heat dissipation device through the main flow passage; estimating the heat dissipating capacity of different heat dissipating fan combinations according to the ambient temperature of the fuel cell engine, selecting the optimal distribution mode, and enabling the corresponding cooling fan; setting a desired temperature of the coolant inlet, and using the enabled fan as a regulator to control the coolant inlet temperature in a closed loop mode.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. A temperature management system of a high-power fuel cell engine is characterized by comprising an electric pile (1), a flow distribution module (6), a multi-module heat dissipation device (4), a heating module (5), a water pump (3) and a controller (7), wherein a coolant outlet end of the electric pile (1) is communicated with the flow distribution module (6), the flow distribution module (6) is also communicated with the multi-module heat dissipation device (4) and the heating module (5) respectively, one end of the water pump is connected with a coolant inlet end of the electric pile (1), the other end of the water pump is connected with the multi-module heat dissipation device (4) and the heating module (5) respectively, a pressure sensor (10) and a temperature sensor (11) are arranged at the coolant inlet end of the electric pile (1), a temperature sensor (11) is also arranged at the coolant outlet end of the electric pile (1), and both the pressure sensor (10) and the temperature sensor (11) are connected with the controller (7), the controller (7) is further connected with the flow distribution module (6), the multi-module heat dissipation device (4), the heating module (5) and the water pump (3), the controller (7) controls the multi-module heat dissipation device (4) and the heating module (5) to be switched on and off through signals of the pressure sensor (10) and the temperature sensor (11), and opening degrees of the flow distribution module (6) and the water pump (3) are adjusted.
2. The high power fuel cell engine temperature management system according to claim 1, further comprising a coolant flow storage module (2), an ion concentration sensor (12), and a deionizer (9), wherein the ion concentration sensor (12) is disposed at a coolant outlet end of the stack (1), the coolant flow storage module (2) is connected between the coolant outlet end of the stack (1) and the other end of the water pump (1), and the deionizer (9) is installed between the coolant flow storage module (2) and the multi-module heat sink (4).
3. A high power fuel cell engine temperature management system according to claim 1, wherein the multi-module heat sink (4) comprises a frame, a fan (41), a heat conducting fin (42) and a coolant flow channel (43), a plurality of coolant flow channels (43) are arranged on the frame at intervals, a plurality of heat conducting fins (42) are arranged between adjacent coolant flow channels (43), and a plurality of individually activated and deactivated fans (41) are arranged on the frame at one side of the coolant flow channels (43).
4. The high power fuel cell engine temperature management system according to claim 1, wherein the flow distribution module (6) is a three-way valve including a valve body (61) and a valve core (65), the valve body (61) is provided with a first pipeline (62), a second pipeline (63) and a third pipeline (64), the first pipeline (62) and the second pipeline (63) form a main flow passage, the first pipeline (62) and the third pipeline (64) form a secondary flow passage, the valve core (65) includes an adjusting shaft and a covering wall surface which are connected with each other, and the covering wall surface is driven to block, partially block, the main flow passage or the secondary flow passage by rotation of the adjusting shaft.
5. The high-power fuel cell engine temperature management system according to claim 1, wherein the controller (7) comprises a power module (73), a signal acquisition module (74), an execution signal generation module (75) and a processing module (71) connected with the power module and the signal acquisition module (74), the power module (73) supplies power to the processing module (71), and the processing module (71) performs calculation processing according to data of the signal acquisition module (74) and then controls the multi-module heat sink (4), the heating module (5), the flow distribution module (6) and the water pump (3) through the execution signal generation module (75).
6. The high power fuel cell engine temperature management system according to claim 1, further comprising an environment monitor (8), wherein the environment monitor (8) comprises an environment temperature obtaining module (81) and an information interaction module (82), the environment temperature obtaining module (81) transmits the temperature information obtained by processing to the information interaction module (82), and the information interaction module (82) receives the processed temperature information and the vehicle speed information and transmits the processed result to the controller.
7. A high power fuel cell engine temperature management system according to claim 6, characterized in that the signal of the environment monitor (8), the signal of the pressure sensor (10) and the signal of the temperature sensor (11) are input signals of the controller (7).
8. The high-power fuel cell engine temperature management system according to claim 7, wherein the controller (7) comprises a communication module (72), a power module (73), a signal acquisition module (74), an execution signal generation module (75) and a processing module (71) connected with the above modules, the power module (73) supplies power to the processing module (71), the communication module (72) communicates with the environment monitor (8) through a CAN protocol, and the processing module (71) performs calculation processing according to data of the signal acquisition module (74) and the communication module (72) and then controls the multi-module heat dissipation device (4), the heating module (5), the flow distribution module (6) and the water pump (3) through the execution signal generation module (75).
9. A control method of a high power fuel cell engine temperature management system, characterized in that the system of any one of the preceding claims 1 to 8 is adopted, and the steps are as follows:
1) the controller (7) judges whether the galvanic pile (1) is in a starting process or a normal operation process according to the temperature of the galvanic pile (1), and the system enters corresponding auxiliary heating control or heat dissipation control;
2) if the system is in auxiliary heating control: when the temperature of the galvanic pile (1) is lower than the working temperature, the controller (7) controls the flow distribution module (6) to enable all the coolant to enter the heating module (5), the coolant circulates in a loop where the heating module (5) is located through the water pump (3), the controller (7) opens the heating module (5) to enable the temperature of the galvanic pile (1) to be rapidly increased to the expected working temperature, when the temperature of the galvanic pile (1) reaches the working temperature, the controller (7) closes the heating module, the flow distribution module (6) is adjusted again to enable the coolant to proportionally enter the loop where the multi-module heat dissipation device (4) is located and the loop where the heating module (5) is located, and the coolant circulates in the system through the water pump (3) to meet the system requirement;
3) and if the system is in heat dissipation control: the controller (7) acquires the power of the galvanic pile (1), calculates the coolant flow according to the expected temperature value of the coolant inlet and outlet end of the galvanic pile (1) and the heat generation power of the galvanic pile (1), and adjusts the opening of the water pump (3); the controller (7) calculates the minimum heat dissipation capacity of the multi-module heat dissipation device (4);
if the minimum heat dissipation capacity of the multi-module heat dissipation device (4) is still larger than the heat dissipation requirement of the system; the controller (7) adjusts the flow distribution module (6) so that the coolant enters the loop where the multi-module heat sink (4) and the loop where the heating module (5) are located in proportion; at the moment, the heating module (5) is closed, and the coolant circulates in the system through the water pump (3), so that the heat dissipation requirement of the system is met;
if the minimum heat dissipation capacity of the multi-module heat dissipation device (4) is smaller than the heat dissipation requirement of the system; the controller (7) adjusts the flow distribution module (6) so that the coolant entirely enters the multi-module heat sink (4); the controller (7) further improves the heat dissipation capability of the multi-module heat dissipation device (4) so as to meet the heat dissipation requirement of the system.
10. The control method of the high power fuel cell engine temperature management system according to claim 9, wherein the multi-module heat sink (4) comprises a plurality of fans (41), and the controller (7) adjusts the heat dissipation capacity of the multi-module heat sink (4) by controlling the number of fans to be turned on and the opening degree of each fan.
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| CN202010449264.0A CN113725460A (en) | 2020-05-25 | 2020-05-25 | High-power fuel cell engine temperature management system and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247255A (en) * | 2023-05-12 | 2023-06-09 | 上海重塑能源科技有限公司 | High-power fuel cell temperature control method and device and vehicle |
| CN116364969A (en) * | 2023-05-12 | 2023-06-30 | 北京重理能源科技有限公司 | High-power fuel cell phase-change heat dissipation system, method, vehicle and storage medium |
| CN117996111A (en) * | 2024-04-03 | 2024-05-07 | 浙江大学 | Cathode open type PEMFC hybrid energy system and control method |
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2020
- 2020-05-25 CN CN202010449264.0A patent/CN113725460A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247255A (en) * | 2023-05-12 | 2023-06-09 | 上海重塑能源科技有限公司 | High-power fuel cell temperature control method and device and vehicle |
| CN116364969A (en) * | 2023-05-12 | 2023-06-30 | 北京重理能源科技有限公司 | High-power fuel cell phase-change heat dissipation system, method, vehicle and storage medium |
| CN116247255B (en) * | 2023-05-12 | 2023-07-07 | 上海重塑能源科技有限公司 | High-power fuel cell temperature control method and device and vehicle |
| CN117996111A (en) * | 2024-04-03 | 2024-05-07 | 浙江大学 | Cathode open type PEMFC hybrid energy system and control method |
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