CN114188569A - Fuel cell system and new energy vehicle power assembly - Google Patents

Fuel cell system and new energy vehicle power assembly Download PDF

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Publication number
CN114188569A
CN114188569A CN202111253440.4A CN202111253440A CN114188569A CN 114188569 A CN114188569 A CN 114188569A CN 202111253440 A CN202111253440 A CN 202111253440A CN 114188569 A CN114188569 A CN 114188569A
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CN
China
Prior art keywords
cooling
liquid
air
controlling
supply system
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Pending
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CN202111253440.4A
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Chinese (zh)
Inventor
马义
张明凯
李波
熊成勇
张剑
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Dongfeng Motor Group Co Ltd
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Dongfeng Motor Group Co Ltd
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Priority to CN202111253440.4A priority Critical patent/CN114188569A/en
Publication of CN114188569A publication Critical patent/CN114188569A/en
Pending legal-status Critical Current

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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
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04253—Means for solving freezing problems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
    • 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
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0432—Temperature; Ambient temperature
    • H01M8/04358—Temperature; Ambient temperature of the coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

The embodiment of the invention provides a fuel cell system and a new energy vehicle power assembly, wherein the temperature of cooling liquid in a cooling system is monitored through a controller, and when the temperature of the cooling liquid is monitored to be lower than or equal to a preset temperature, an air supply system and a hydrogen supply system are controlled to purge a reaction cavity so as to prevent the interior of a galvanic pile from being blocked. The cooling loop is controlled to be disconnected relative to the liquid outlet pipe and the liquid inlet pipe through the controller, so that the cooling liquid only flows in the cooling loop in a circulating mode, then the air supply system is controlled to be communicated with the liquid outlet pipe, and the cooling liquid in the liquid inlet pipe, the cooling cavity and the liquid outlet pipe is emptied by the air provided by the air supply system. Therefore, when the fuel cell is started in a low-temperature environment, the cooling loop of the fuel cell is free from cooling liquid, the cooling liquid in the cooling cavity of the fuel cell does not need to be heated, and the energy consumption and the time consumption of the starting process of the fuel cell are reduced.

Description

Fuel cell system and new energy vehicle power assembly
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell system and a new energy vehicle power assembly.
Background
The fuel cell system includes a stack, an air system, a hydrogen system, a cooling system, and a controller. The starting process of the fuel cell system is longer than the starting time at normal temperature (for example, 20 ℃) at low ambient temperature (below 0 ℃), and the main reason is that the fuel cell stack needs to be internally iced at low temperature, and the deicing is generally completed by a heating method.
There are two common heating methods: one is internal heating, namely heating by generating heat through chemical reaction in the galvanic pile, and the other is external heating, wherein PTC is adopted to heat cooling liquid, and then the galvanic pile is heated by the cooling liquid to heat. In the prior art, two heating methods are basically adopted for electric pile deicing, and in the electric pile heating deicing process, the energy consumption required by heating the cooling liquid accounts for 40% of the total heating energy consumption, so that the electric pile deicing time is greatly prolonged, and the cold start time and the energy consumption of a fuel cell system are increased.
Disclosure of Invention
The embodiment of the invention provides a fuel cell system and a new energy vehicle power assembly, and solves the technical problems of high cold start energy consumption and long start time of a fuel cell in the related technology.
In a first aspect, the present invention provides a fuel cell system according to an embodiment of the present invention, the fuel cell system including: the system comprises a galvanic pile, an air supply system, a hydrogen supply system, a cooling system and a controller; the cooling system comprises a cooling loop, a liquid outlet pipe and a liquid inlet pipe; the liquid outlet pipe and the liquid inlet pipe are connected between the cooling loop and the cooling cavity of the galvanic pile; the air supply system and the hydrogen supply system are both connected with the reaction cavity of the galvanic pile, and the air supply system is connected with the liquid outlet pipe;
the controller is configured to:
when the temperature of cooling liquid in the cooling system is monitored to be lower than or equal to a preset temperature, controlling the air supply system and the hydrogen supply system to purge the reaction cavity; and under the state that the cooling loop is disconnected relative to the liquid outlet pipe and the liquid inlet pipe, controlling the air supply system to be communicated with the liquid outlet pipe, and emptying the cooling liquid in the liquid outlet pipe, the cooling cavity and the liquid inlet pipe by utilizing the air provided by the air system.
Preferably, the controller is further configured to: monitoring an operating state of the air supply system; judging whether the cooling liquid in the liquid outlet pipe, the cooling cavity and the liquid inlet pipe is emptied or not according to the running state; and if so, controlling the electric pile to start.
Preferably, the fuel cell system further includes: the heater is used for heating the cooling liquid in the cooling loop and is electrically connected with the galvanic pile; the controller is further configured to: after the control of the start of the electric pile, controlling the electric pile to output electric energy to the heater to gradually increase according to a preset power increase control parameter; and when the actual electrical parameter of the galvanic pile is higher than a preset electrical parameter threshold value and the temperature of the cooling liquid in the cooling circuit is higher than the preset temperature, controlling the cooling circuit to be communicated with the liquid outlet pipe, controlling the cooling circuit to be communicated with the liquid inlet pipe, and controlling the air supply system to be disconnected with the liquid outlet pipe, so that the cooling liquid heated in the cooling circuit enters the cooling cavity.
Preferably, the air supply system includes: an air compressor, an air outlet pipe and a back pressure valve; the gas output end of the air compressor is connected with the first gas inlet end of the reaction cavity; the back pressure valve is arranged on the air outlet pipe, and the air outlet pipe is connected with the first air outlet end of the reaction cavity; the hydrogen gas supply system includes: a proportional valve and a circulation pump; the second gas inlet end of the reaction cavity and the gas output end of the circulating pump are provided with the proportional valves, and the second gas outlet end of the reaction cavity is connected with the gas input end of the circulating pump; the cooling circuit includes: a liquid outlet three-way valve, a liquid inlet three-way valve, a communicating pipe and a cooling pump; the liquid outlet three-way valve is connected with the liquid outlet pipe, the communicating pipe and the cooling pump; the liquid inlet three-way valve is connected with the liquid inlet pipe, the communicating pipe and the cooling pump; one end of the communicating pipe is connected with the liquid inlet three-way valve, and the other end of the communicating pipe is connected with the liquid outlet three-way valve; the air outlet pipe is connected with the liquid outlet pipe through an air purge valve, and the liquid inlet pipe is connected with the cooling liquid tank through a two-way valve; the air compressor machine, the outlet duct, the proportional valve, the circulating pump, the back pressure valve, go out the liquid three-way valve, the feed liquor three-way valve and the cooling pump all with the controller is connected.
Preferably, the controller is specifically configured to: when the temperature of cooling liquid in the cooling system is monitored to be lower than or equal to a preset temperature, controlling the running states of the air compressor and the circulating pump, and controlling the opening degrees of the back pressure valve and the proportional valve to purge the reaction cavity; controlling the liquid inlet three-way valve and the liquid outlet three-way valve to be closed so that the cooling liquid only circularly flows in the cooling loop; and controlling the air purge valve and the two-way valve to be opened so as to discharge the cooling liquid in the liquid outlet pipe, the cooling cavity and the liquid inlet pipe to the cooling liquid tank through the two-way valve by utilizing the air provided by the air compressor.
Preferably, the controller is further configured to: when the air purge valve and the two-way valve are both in an opening state, acquiring opening duration and opening data of the back pressure valve; and if the opening time is detected to exceed the preset time, and the opening data meets the preset fluctuation requirement, the drain pipe, the cooling cavity and the cooling liquid in the liquid inlet pipe are judged to be emptied.
Preferably, the controller is further specifically configured to: controlling the running state of the air compressor based on a target air flow, and controlling the opening of the back pressure valve based on the target air pressure so that the air supply system provides air required by the start of the electric pile; and controlling the running state of the circulating pump based on the target hydrogen flow, and controlling the opening of the proportional valve based on the target hydrogen pressure so that the hydrogen supply system provides hydrogen required by the start-up of the electric pile.
Preferably, the controller is further specifically configured to: controlling the opening of the liquid outlet three-way valve to communicate the cooling loop with the liquid outlet pipe; controlling the opening of the liquid inlet three-way valve to enable the cooling circuit to be communicated with the liquid inlet pipe; and controlling the air purge valve and the two-way valve to be closed so as to enable the heated cooling liquid in the cooling circuit to enter the cooling cavity.
Preferably, the fuel cell system further includes: a temperature control valve and radiator assembly; a first liquid outlet of the temperature control valve is connected with the cooling pump, a second liquid outlet of the temperature control valve is connected with the radiator assembly, and the radiator assembly is connected with the cooling pump; the controller is further configured to: if the temperature of the cooling liquid in the cooling system is monitored to be greater than the heat dissipation temperature threshold value, controlling a second liquid outlet of the temperature control valve to be opened so that the cooling liquid enters the radiator assembly for cooling; otherwise, controlling the first liquid outlet of the temperature control valve to be opened so that the cooling liquid cannot flow through the radiator assembly.
In a second aspect, the invention provides a new energy vehicle powertrain including a driving motor and the fuel cell system according to any one of the first aspect; the fuel cell system is used for providing electric energy required by the work for the driving motor; the driving motor is used for driving the vehicle to run.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
the invention can monitor the temperature of the cooling liquid in the cooling system through the controller, and control the air supply system and the hydrogen supply system to purge the reaction cavity when the temperature of the cooling liquid is monitored to be lower than or equal to the preset temperature. And controlling the cooling loop to be disconnected relative to the liquid outlet pipe and the liquid inlet pipe so as to enable the cooling liquid to only circularly flow in the cooling loop, and then controlling the air supply system to be communicated with the liquid outlet pipe so as to utilize the air provided by the air supply system to empty the cooling liquid in the liquid inlet pipe, the cooling cavity and the liquid outlet pipe. Therefore, when the fuel cell is started in a low-temperature environment, the fuel cell cannot be started due to solidification of the cooling liquid in the cooling cavity, and the cooling liquid in the cooling cavity of the fuel cell does not need to be heated, so that the energy consumption and the time consumption in the starting process of the fuel cell are reduced, and the cold starting efficiency of the fuel cell is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view showing the structure of a fuel cell system in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a fuel cell system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control connection of the controller of FIG. 1 or FIG. 2;
FIG. 4 is a schematic diagram of a powertrain structure of a new energy vehicle according to an embodiment of the invention.
Detailed Description
The embodiment of the invention provides a fuel cell system and a new energy vehicle power assembly, and solves the technical problems of high cold start energy consumption and long start time of a fuel cell in the related technology.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
and monitoring the temperature of the cooling liquid in the cooling system through a controller, and controlling the air supply system and the hydrogen supply system to purge the reaction cavity when the temperature of the cooling liquid is monitored to be lower than or equal to a preset temperature so as to prevent the interior of the galvanic pile from being blocked. The controller controls the cooling loop to be disconnected relative to the liquid outlet pipe and the liquid inlet pipe so that the cooling liquid only flows in the cooling loop in a circulating mode, and then the air supply system is controlled to be communicated with the liquid outlet pipe so that the cooling liquid in the liquid inlet pipe, the cooling cavity and the liquid outlet pipe can be emptied by the air provided by the air supply system.
Because the cooling liquid is not arranged in the cooling loop of the fuel cell when the fuel cell is started in the low-temperature environment, the situation that the fuel cell cannot be started due to the fact that the cooling liquid is solidified in the cooling cavity is avoided, the cooling liquid in the cooling cavity of the fuel cell does not need to be heated, energy consumption and time consumption in the starting process of the fuel cell are reduced, and the cold starting efficiency of the fuel cell is effectively improved.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
In a first aspect, the present invention provides a fuel cell system according to an embodiment of the present invention, and aims to solve the technical problems of high energy consumption and long start time of a fuel cell during a start process in a low temperature environment.
Referring to fig. 1, the fuel cell system includes: the air-conditioning system includes a stack 100, an air supply system 200, a hydrogen supply system 300, a cooling system 400, and a controller 400. The cooling system 400 includes a cooling circuit 401, a liquid outlet pipe 402 and a liquid inlet pipe 403; a liquid outlet pipe 402 and a liquid inlet pipe 403 are connected between the cooling loop 401 and the cooling cavity 600 of the galvanic pile 100; the air supply system 200 and the hydrogen supply system 300 are both connected with the reaction cavity 700 of the stack 100, and the air supply system 200 is connected with the liquid outlet pipe 402.
Wherein the controller 400 is configured to: when the temperature of the cooling liquid in the cooling system 400 is monitored to be lower than or equal to the preset temperature, the air supply system 200 and the hydrogen supply system 300 are controlled to purge the reaction cavity 700, so as to avoid the internal blockage of the stack 100 as much as possible. In a state where cooling circuit 401 is disconnected from liquid outlet pipe 402 and liquid inlet pipe 403, air supply system 200 is controlled to communicate with liquid outlet pipe 402 and to evacuate the cooling liquid in liquid outlet pipe 402, cooling cavity 600 and liquid inlet pipe 403 with air provided by the air system.
In order to achieve the above-described configuration, the air supply system 200, the hydrogen gas supply system 300, and the cooling circuit 401 will be described in more detail below.
Referring to fig. 2, for the air supply system 200, specifically, the air supply system 200 may include: an air compressor 201, an outlet pipe 202 and a back pressure valve 203. The gas output end of the air compressor 201 is connected with the first gas inlet end 701 of the reaction cavity 700; the back pressure valve 203 is disposed on the outlet pipe 202, and the outlet pipe 202 is connected to the first outlet end 702 of the reaction cavity 700.
With continued reference to fig. 2, for the hydrogen supply system 300, in particular, the hydrogen supply system 300 may include: a proportional valve 301 and a circulation pump 302; the second air inlet end 703 of the reaction cavity 700 and the gas output end of the circulating pump 302 are provided with a proportional valve 301, and the second air outlet end 704 of the reaction cavity 700 is connected with the gas input end of the circulating pump 302.
With continued reference to fig. 2, for the cooling circuit 401, in particular, the cooling circuit 401 may include: a liquid outlet three-way valve 4011, a liquid inlet three-way valve 4012, a communicating pipe 4013 and a cooling pump 4014; the liquid outlet three-way valve 4011 is connected with a liquid outlet pipe 402, a communicating pipe 4013 and a cooling pump 4014; the liquid inlet three-way valve 4012 is connected with a liquid inlet pipe 403, a communicating pipe 4013 and a cooling pump 4014; one end of the communicating pipe 4013 is connected with a liquid inlet three-way valve 4012, and the other end of the communicating pipe 4013 is connected with a liquid outlet three-way valve 4011.
It should be noted that, in order to purge the cooling liquid in the liquid outlet pipe 402, the cooling cavity 600 and the liquid inlet pipe 403 by using the air provided by the air system, as shown in fig. 2, the air outlet pipe 202 may be connected to the liquid outlet pipe 402 through an air purge valve 800, and the liquid inlet pipe 403 may be connected to the cooling liquid tank 405 through a two-way valve 404. In addition, in order to realize corresponding control by the controller 400, please refer to fig. 3, the air compressor 201, the proportional valve 301, the circulating pump 302, the back pressure valve 203, the liquid outlet three-way valve 4011, the liquid inlet three-way valve 4012, the cooling pump 4014, the air purge valve 800 and the two-way valve 404 are all connected to the controller 400.
A temperature sensor (not shown) may be provided at any one or more positions of the cooling system 400 and connected to the controller 400, so that the temperature of the cooling fluid in the cooling system 400 can be monitored by the controller 400. For example, a temperature sensor may be disposed in effluent pipe 402 and/or effluent pipe 403.
Specifically, the controller 400 may be configured to: when the temperature of the cooling liquid in the cooling system 400 is monitored to be lower than or equal to the preset temperature, the operation states of the air compressor 201 and the circulating pump 302 are controlled, and the opening degrees of the backpressure valve 203 and the proportional valve 301 are controlled, so that the reaction cavity 700 is purged. The liquid inlet three-way valve 4012 and the liquid outlet three-way valve 4011 are controlled to be closed, so that the cooling liquid only circularly flows in the cooling loop 401; the air purge valve 800 and the two-way valve 404 are controlled to be opened, so that the air provided by the air compressor 201 is used for discharging the cooling liquid in the liquid outlet pipe 402, the cooling cavity 600 and the liquid inlet pipe 403 to the cooling liquid tank 405 through the two-way valve 404.
In a specific implementation, the preset temperature may be set according to the freezing point of the cooling liquid, for example, if the cooling liquid is water, the preset temperature may be set to the freezing point of water, i.e., 0 ℃; if the coolant is an aqueous solution of ethylene glycol, the preset temperature may be set to the freezing point of the aqueous solution of ethylene glycol, i.e., -11 ℃.
In order to drain coolant from outlet pipe 402, cooling cavity 600, and inlet pipe 403 more completely, the coolant in outlet pipe 402, cooling cavity 600, and inlet pipe 403 is prevented from solidifying to affect the start-up of the fuel cell. The controller 400 may also be configured to: monitoring the running state of the air supply system 200, and judging whether the cooling liquid in the liquid outlet pipe 402, the cooling cavity 600 and the liquid inlet pipe 403 is emptied or not according to the running state; if yes, the stack 100 is controlled to start.
Specifically, the controller 400 is specifically configured to: when both the air purge valve 800 and the two-way valve 404 are in the open state, the operating state of the air supply system 200 is monitored by acquiring the open time and the opening data of the back pressure valve 203. And if the opening time is detected to exceed the preset time, and the opening data meets the preset fluctuation requirement, the cooling liquid in the liquid outlet pipe 402, the cooling cavity 600 and the liquid inlet pipe 403 is judged to be emptied.
In a specific implementation, the preset time period may be determined according to the magnitude of the air flow provided by the air supply system 200, and in general, if the air flow provided by the air supply system 200 is large, the preset time period may be set to be short; otherwise, the preset time length can be set to be longer. For example, the preset time period may be set to any one of 4 seconds, 5 seconds, or 6 seconds.
In a specific implementation, the preset fluctuation requirement may include: the fluctuation range of the opening degree data is within a preset fluctuation range. For example, if the fluctuation range of the opening data is less than 3%, the opening data meets the preset fluctuation requirement.
As an alternative embodiment, the controller 400 is further configured to control the start-up of the stack 100 after determining that the coolant in the inlet pipe 403, the cooling cavity 600, and the outlet pipe 402 is empty. Specifically, the controller 400 may control the operation state of the air compressor 201 based on the target air flow rate, and control the opening degree of the back pressure valve 203 based on the target air pressure, so that the air supply system 200 supplies air required for the start-up of the stack 100; the opening degree of the proportional valve 301 is controlled based on the target hydrogen pressure based on the operating state of the target hydrogen flow control circulation pump 302 so that the hydrogen supply system 300 supplies hydrogen required for the start-up of the stack 100.
In particular implementations, the target air flow rate, the target air pressure, the target hydrogen flow rate, and the target hydrogen pressure required for fuel cell start-up may be determined experimentally.
In order to be able to detect the actual air flow rate of the air supply system 200, one or more gas pressure sensors (not shown) may be provided in the air supply system 200 and connected to the controller 400. For example, a gas pressure sensor may be provided on the outlet conduit 202 and/or between the reaction chamber and the back pressure valve 203.
In order to be able to detect the actual air pressure of the air supply system 200, one or more gas flow meters (not shown) may be provided in the air supply system 200 and connected to the controller 400. For example, a gas flow meter may be provided on the outlet conduit 202 and/or between the reaction chamber and the back pressure valve 203.
In order to be able to detect the actual hydrogen flow rate of the hydrogen supply system 300, one or more hydrogen pressure sensors (not shown) may be provided in the hydrogen supply system 300 and connected to the controller 400. For example, a hydrogen pressure sensor may be disposed between the proportional valve 301 and the second inlet end 703, and/or a hydrogen pressure sensor may be disposed between the second outlet end 704 and the circulation pump 302.
In order to be able to detect the actual hydrogen pressure of the hydrogen supply system 300, one or more hydrogen flow meters (not shown) may be provided in the hydrogen supply system 300 and connected to the controller 400. For example, a hydrogen flow meter may be disposed between the proportional valve 301 and the second inlet end 703, and/or a hydrogen flow meter may be disposed between the second outlet end 704 and the circulation pump 302.
It should be noted that, when a plurality of gas pressure sensors are provided, the actual air pressure of the air supply system 200 may be determined based on the pressure data detected by the plurality of gas pressure sensors. For example, the minimum pressure data detected by the plurality of gas pressure sensors may be determined as the actual air pressure of the air supply system 200, or the average value of the pressure data detected by the plurality of gas pressure sensors may be determined as the actual air pressure of the air supply system 200. Based on the same embodiment, the actual air flow rate, the actual hydrogen pressure, and the actual hydrogen pressure can be determined, and for brevity of the description, the details are not repeated herein.
In order to heat the cooling liquid in the cooling system 400, as shown in fig. 2, the fuel cell system may further include: and a heater 406 for heating the cooling liquid in the cooling circuit 401, wherein the heater 406 is electrically connected with the stack 100. In a specific implementation, the heater 406 heats the cooling liquid in the cooling circuit 401 by using the power generated by the stack 100, and the heater 406 may be a PTC heater (PTC heater).
As an alternative embodiment, the controller 400 may be further configured to: after controlling the start of the stack 100, controlling the stack 100 to gradually increase the power of the electric energy output to the heater 406 according to a preset power increase control parameter; until the actual electrical parameter of the stack 100 is higher than the preset electrical parameter threshold value and the temperature of the cooling liquid in the cooling circuit 401 is higher than the preset temperature, the cooling circuit 401 and the liquid outlet pipe 402 are controlled to be communicated, the cooling circuit 401 and the liquid inlet pipe 403 are controlled to be communicated, and the air supply system 200 and the liquid outlet pipe 402 are controlled to be disconnected, so that the cooling liquid heated in the cooling circuit 401 enters the cooling cavity 600.
In a specific implementation, the power increase control parameter may be set according to the usage requirement of the fuel cell, for example, if the service life of the fuel cell needs to be prolonged, the power increase control parameter may be set to be smaller; the power increase control parameter may be set larger if it is necessary to shorten the start-up time of the fuel cell.
It should be noted that, in the process of controlling the stack 100 to output the electric energy to the heater 406, the controller 400 may adjust the heating power of the heater 406 according to the net output power of the fuel cell system in real time, so as to make the net output power of the fuel cell system be 0 or close to 0, thereby preventing the power battery connected to the fuel cell system from being overcharged or incapable of being charged, and avoiding the failure of the fuel cell system and/or the power battery.
In a specific implementation, the actual electrical parameters of the stack 100 may include: a current parameter and/or a voltage parameter. Correspondingly, the preset electrical parameter threshold may include: a preset current parameter threshold and/or a preset voltage parameter threshold. For example, the preset current parameter threshold may be any value of 90 to 110 amperes; the predetermined voltage parameter threshold may be any one of 0.5 volts to 0.7 volts.
In a specific implementation process, if the temperature of the cooling liquid in the cooling circuit 401 is higher than a preset temperature and the actual electrical parameter of the stack 100 is higher than a preset electrical parameter threshold, the controller 400 is specifically configured to: the liquid outlet three-way valve 4011 is controlled to be opened so as to communicate the cooling loop 401 with the liquid outlet pipe 402; controlling the liquid inlet three-way valve 4012 to be opened so as to enable the cooling loop 401 to be communicated with the liquid inlet pipe 403 again; the control air purge valve 800 and the two-way valve 404 are closed to allow the heated coolant in the cooling circuit 401 to enter the cooling cavity 600.
After the cooling fluid enters the cooling cavity 600, the cooling fluid is further heated by heat generated during the operation of the stack 100, in order to prevent the temperature of the cooling fluid in the cooling system 400 from being too high, and prevent the stack 100 from being damaged due to overheating of the stack 100. Referring to fig. 2, the fuel cell system may further include: a thermostatic valve 407 and a radiator assembly 408. A first liquid outlet of the temperature control valve 407 is connected to the cooling pump 4014, a second liquid outlet of the temperature control valve 407 is connected to the radiator assembly 408, and the radiator assembly 408 is connected to the cooling pump 4014. The thermo valve 407 is electrically connected to the controller 500.
Correspondingly, the controller 400 is further configured to: if the temperature of the cooling liquid in the cooling system 400 is monitored to be greater than the heat dissipation temperature threshold, controlling the second liquid outlet of the temperature control valve 407 to be opened, so that the cooling liquid enters the radiator assembly 408 for cooling; otherwise, the first outlet of the thermostatic valve 407 is controlled to be opened, so that the cooling liquid cannot flow through the radiator assembly 408.
In a specific implementation process, a heat dissipation temperature threshold can be set according to the protection requirement on the fuel cell system, and the higher the heat dissipation temperature threshold is, the higher the temperature which can be reached by the fuel cell system during operation is, and the worse the heat dissipation of the fuel cell system is; conversely, the lower the heat dissipation temperature threshold, the better the heat dissipation of the fuel cell system. For example, the heat dissipation temperature threshold may be set to any value between 37 ℃ and 40 ℃.
Further, the power consumption of the radiator assembly 408 can be reduced by controlling the coolant not to flow through the radiator assembly 408 when the temperature of the coolant is lower than or equal to the heat dissipation temperature threshold; when the temperature of the coolant is greater than the heat dissipation temperature threshold, the coolant is controlled to enter the heat sink assembly 408 for cooling, so as to prevent local overheating damage inside the stack 100.
In order to more intuitively embody the technical effects of the present invention that the cooling liquid in the fuel cell cooling cavity 600 does not need to be heated when the fuel cell is started in a low temperature environment, and the energy consumption and the time consumption in the starting process of the fuel cell can be effectively reduced, the following examples are given:
first, if the heating amount required to heat the coolant from the initial temperature to the predetermined temperature is obtained when the liquid inlet pipe 403, the cooling cavity 600 and the liquid outlet pipe 402 are filled with the coolant, the heating amount can be calculated by the following formula:
Q1＝C1×(T0-T1)×V×ρ1
in the formula, Q1Is the first total heat quantity, C1Specific heat capacity of the coolant, T0To a predetermined temperature, T1V is the total volume of inlet pipe 403, cooling cavity 600, and outlet pipe 402, ρ is the initial temperature of the cooling fluid1Is the density of the cooling fluid.
Secondly, when the interior of the inlet pipe 403, the cooling cavity 600 and the outlet pipe 402 are filled with air, the heating amount required for raising the temperature of the air from the same initial temperature to the same preset temperature can also be calculated by the following formula:
Q2＝C2×(T0-T2)×V×ρ2
in the formula, Q2Is the second total heat quantity, C2Is the specific heat capacity of air, T0To a predetermined temperature, T2Is the initial temperature of the air, and V is the total volume of inlet pipe 403, cooling cavity 600, and outlet pipe 402, ρ1Is the density of air.
If, in the fuel cell system, the specific heat capacity of the coolant at a constant pressure is 3.2 kJ/kg.K, the specific heat capacity of the air at a constant pressure is 1.01 kJ/kg.K, the initial temperature of the coolant is-30 ℃, the preset temperature is 0 ℃, the total volume of the liquid inlet pipe 403, the cooling cavity 600 and the liquid outlet pipe 402 is 10L, the density of the coolant is 1.1kg/L, and the density of the air is 0.0013kg/L, then the following conclusions are made:
when the liquid inlet pipe 403, the cooling cavity 600 and the liquid outlet pipe 402 are filled with air, the heating heat required for heating the air from-30 ℃ to 0 ℃ is 0.4 kj; when the interior of the inlet pipe 403, the cooling cavity 600 and the outlet pipe 402 are filled with the cooling liquid, the heating heat required to raise the temperature of the cooling liquid from-30 ℃ to 0 ℃ is 1056 kj.
Obviously, in the embodiment of the present invention, the cooling liquid inside the liquid inlet pipe 403, the cooling cavity 600, and the liquid outlet pipe 402 is evacuated, and the cooling liquid in the fuel cell cooling cavity 600 does not need to be heated, so that the energy consumption and the time consumption in the starting process of the fuel cell are reduced, and the cold start efficiency of the fuel cell is effectively improved.
In addition, in order to bypass the excess air, referring to fig. 2, the air supply system 200 may further include: and a pressure relief valve 204, wherein the pressure relief valve 204 can be used for communicating the air outlet pipe 202 with the air outlet end of the air compressor 201, and the air supply system 200 can be relieved by opening the pressure relief valve 204.
In order to recycle the hydrogen gas that the hydrogen gas supply system 300 purges the reaction cavity 700, please refer to fig. 2, the hydrogen gas supply system 300 may further include: a gas-liquid separator 303 and a hydrogen discharge drain valve 304. The gas-liquid separator 303 may be disposed between the circulation pump 302 and the second gas outlet 704, and is used to separate liquid water from the hydrogen gas, and the circulation pump 302 is used to recycle the hydrogen gas; the hydrogen discharge water discharge valve 304 may be disposed on a discharge port of the gas-liquid separator 303, and when the hydrogen discharge water discharge valve 304 is opened, the liquid water and a part of the hydrogen gas separated by the gas-liquid separator 303 can be discharged through the hydrogen discharge water discharge valve 304.
To exhaust gases that may be present in the cooling system 400 and to replenish the cooling liquid in the cooling system 400, please continue to refer to fig. 2, the cooling system 400 may further include: a degassing branch 409 and a fluid replacement branch 410. A degassing branch 409 may be used to connect the cooling cavity 600 with the coolant tank 405; the fluid replacement branch 410 may be used to communicate the coolant tank 405 with the coolant pump 4014.
In a second aspect, the invention provides a new energy vehicle powertrain according to an embodiment of the invention, as shown in fig. 4, the new energy vehicle powertrain includes a driving motor 4001 and a fuel cell system 4002 according to any one of the first aspect; wherein, the fuel cell system 4002 is used for providing electric energy required by the operation for the driving motor 4001; the drive motor 4001 is used to drive the vehicle to travel. The details of the implementation of the fuel cell system 4002 can refer to the above-mentioned embodiments, and are not repeated herein for brevity of the description.
The technical scheme in the embodiment of the invention at least has the following technical effects or advantages:
1. in the embodiment of the invention, the temperature of the cooling liquid in the cooling system 400 is monitored by the controller 400, and when the temperature of the cooling liquid is monitored to be lower than or equal to the preset temperature, the air supply system 200 and the hydrogen supply system 300 are controlled to purge the reaction cavity 700, so that the internal blockage of the stack 100 is prevented.
2. In the embodiment of the invention, the cooling circuit 401 is controlled by the controller 400 to be disconnected from the liquid outlet pipe 402 and the liquid inlet pipe 403, so that the cooling liquid only circulates in the cooling circuit 401, and then the air supply system 200 is controlled to be communicated with the liquid outlet pipe 402, so that the cooling liquid in the liquid inlet pipe 403, the cooling cavity 600 and the liquid outlet pipe 402 is emptied by the air provided by the air supply system 200. Because the cooling liquid does not exist in the cooling loop 401 of the fuel cell when the fuel cell is started in the low-temperature environment, the situation that the fuel cell cannot be started due to the fact that the cooling liquid is solidified in the cooling cavity 600 is avoided, and therefore the cooling liquid in the cooling cavity 600 of the fuel cell does not need to be heated, energy consumption and time consumption in the starting process of the fuel cell are reduced, and cold starting efficiency of the fuel cell is effectively improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer instructions. These computer instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A fuel cell system, characterized by comprising: the system comprises a galvanic pile, an air supply system, a hydrogen supply system, a cooling system and a controller;
the cooling system comprises a cooling loop, a liquid outlet pipe and a liquid inlet pipe; the liquid outlet pipe and the liquid inlet pipe are connected between the cooling loop and the cooling cavity of the galvanic pile; the air supply system and the hydrogen supply system are both connected with the reaction cavity of the galvanic pile, and the air supply system is connected with the liquid outlet pipe;
the controller is configured to:
when the temperature of cooling liquid in the cooling system is monitored to be lower than or equal to a preset temperature, controlling the air supply system and the hydrogen supply system to purge the reaction cavity;
and under the state that the cooling loop is disconnected relative to the liquid outlet pipe and the liquid inlet pipe, controlling the air supply system to be communicated with the liquid outlet pipe, and utilizing air provided by the air system to empty the liquid outlet pipe, the cooling cavity and the cooling liquid in the liquid inlet pipe.
2. The system of claim 1, wherein the controller is further configured to:
monitoring the running state of the air supply system, and judging whether the cooling liquid in the liquid outlet pipe, the cooling cavity and the liquid inlet pipe is emptied or not according to the running state;
and if so, controlling the electric pile to start.
3. The system of claim 2, wherein the fuel cell system further comprises: the heater is used for heating the cooling liquid in the cooling loop and is electrically connected with the galvanic pile; the controller is further configured to:
after the control of the start of the electric pile, controlling the electric pile to output electric energy to the heater to gradually increase according to a preset power increase control parameter;
and when the actual electrical parameter of the galvanic pile is higher than a preset electrical parameter threshold value and the temperature of the cooling liquid in the cooling circuit is higher than the preset temperature, controlling the cooling circuit to be communicated with the liquid outlet pipe, controlling the cooling circuit to be communicated with the liquid inlet pipe, and controlling the air supply system to be disconnected with the liquid outlet pipe, so that the cooling liquid heated in the cooling circuit enters the cooling cavity.
4. The system of claim 3, wherein the air supply system comprises:
an air compressor, an air outlet pipe and a back pressure valve; the gas output end of the air compressor is connected with the first gas inlet end of the reaction cavity; the back pressure valve is arranged on the air outlet pipe, and the air outlet pipe is connected with the first air outlet end of the reaction cavity;
the hydrogen gas supply system includes: a proportional valve and a circulation pump; the second gas inlet end of the reaction cavity and the gas output end of the circulating pump are provided with the proportional valves, and the second gas outlet end of the reaction cavity is connected with the gas input end of the circulating pump;
the cooling circuit includes: a liquid outlet three-way valve, a liquid inlet three-way valve, a communicating pipe and a cooling pump; the liquid outlet three-way valve is connected with the liquid outlet pipe, the communicating pipe and the cooling pump; the liquid inlet three-way valve is connected with the liquid inlet pipe, the communicating pipe and the cooling pump; one end of the communicating pipe is connected with the liquid inlet three-way valve, and the other end of the communicating pipe is connected with the liquid outlet three-way valve;
the air outlet pipe is connected with the liquid outlet pipe through an air purge valve, and the liquid inlet pipe is connected with the cooling liquid tank through a two-way valve; the air compressor machine, the outlet duct, the proportional valve, the circulating pump, the back pressure valve, go out the liquid three-way valve, the feed liquor three-way valve and the cooling pump all with the controller is connected.
5. The system of claim 4, wherein the controller is specifically configured to:
when the temperature of cooling liquid in the cooling system is monitored to be lower than or equal to a preset temperature, controlling the running states of the air compressor and the circulating pump, and controlling the opening degrees of the back pressure valve and the proportional valve to purge the reaction cavity;
controlling the liquid inlet three-way valve and the liquid outlet three-way valve to be closed so that the cooling liquid only circularly flows in the cooling loop; and controlling the air purge valve and the two-way valve to be opened so as to discharge the cooling liquid in the liquid outlet pipe, the cooling cavity and the liquid inlet pipe to the cooling liquid tank through the two-way valve by utilizing the air provided by the air compressor.
6. The system of claim 4, wherein the controller is further specifically configured to:
when the air purge valve and the two-way valve are both in an opening state, acquiring opening duration and opening data of the back pressure valve;
and if the opening time is detected to exceed the preset time, and the opening data meets the preset fluctuation requirement, the drain pipe, the cooling cavity and the cooling liquid in the liquid inlet pipe are judged to be emptied.
7. The system of claim 4, wherein the controller is further specifically configured to:
controlling the running state of the air compressor based on a target air flow, and controlling the opening of the back pressure valve based on the target air pressure so that the air supply system provides air required by the start of the electric pile;
and controlling the running state of the circulating pump based on the target hydrogen flow, and controlling the opening of the proportional valve based on the target hydrogen pressure so that the hydrogen supply system provides hydrogen required by the start-up of the electric pile.
8. The system of claim 4, wherein the controller is further specifically configured to:
controlling the opening of the liquid outlet three-way valve to communicate the cooling loop with the liquid outlet pipe; controlling the opening of the liquid inlet three-way valve to enable the cooling circuit to be communicated with the liquid inlet pipe; and controlling the air purge valve and the two-way valve to be closed so as to enable the heated cooling liquid in the cooling circuit to enter the cooling cavity.
9. The system of claim 4, wherein the fuel cell system further comprises: a temperature control valve and radiator assembly; a first liquid outlet of the temperature control valve is connected with the cooling pump, a second liquid outlet of the temperature control valve is connected with the radiator assembly, and the radiator assembly is connected with the cooling pump;
the controller is further configured to:
if the temperature of the cooling liquid in the cooling system is monitored to be greater than the heat dissipation temperature threshold value, controlling a second liquid outlet of the temperature control valve to be opened so that the cooling liquid enters the radiator assembly for cooling;
otherwise, controlling the first liquid outlet of the temperature control valve to be opened so that the cooling liquid cannot flow through the radiator assembly.
10. A new energy vehicle powertrain characterized by comprising a drive motor and a fuel cell system according to any one of claims 1 to 9; the fuel cell system is used for providing electric energy required by the work for the driving motor; the driving motor is used for driving the vehicle to run.
CN202111253440.4A 2021-10-27 2021-10-27 Fuel cell system and new energy vehicle power assembly Pending CN114188569A (en)

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