CN111452674B - Full-power hydrogen fuel cell car auxiliary group energy system cooling system - Google Patents
Full-power hydrogen fuel cell car auxiliary group energy system cooling system Download PDFInfo
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- CN111452674B CN111452674B CN202010310172.4A CN202010310172A CN111452674B CN 111452674 B CN111452674 B CN 111452674B CN 202010310172 A CN202010310172 A CN 202010310172A CN 111452674 B CN111452674 B CN 111452674B
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- way valve
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000001257 hydrogen Substances 0.000 title claims abstract description 65
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 65
- 238000001816 cooling Methods 0.000 title claims abstract description 41
- 239000000446 fuel Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000110 cooling liquid Substances 0.000 claims description 44
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Classifications
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- 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
- B60L58/33—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 cooling
-
- 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
-
- 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
-
- 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
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a cooling system of an auxiliary group energy system of a full-power hydrogen fuel cell vehicle, which specifically comprises the following components: the device comprises a water pump, a hydrogen pressure reducing valve, a one-way valve, a cold accumulator, a power battery, a temperature sensor, a proportional four-way valve and a controller; the water pump is connected with the hydrogen pressure reducing valve through a pipeline; the hydrogen pressure reducing valve is connected with the one-way valve through a pipeline; the one-way valve is connected with the cold accumulator through a pipeline; the cold accumulator is connected with the proportional four-way valve through a pipeline; the proportional four-way valve is connected with the power battery through a pipeline; the power battery is electrically connected with the temperature sensor; the controller is electrically connected with the water pump, the one-way valve, the temperature sensor and the proportional four-way valve; the beneficial effects of the invention are as follows: the hydrogen is heated, the thermal shock to the FCS system is reduced, the battery is cooled by utilizing the hydrogen cold energy, the normal and extreme working condition running requirements of the hydrogen fuel cell vehicle can be met in energy, and the energy of the whole vehicle is comprehensively utilized.
Description
Technical Field
The invention relates to the field of fuel cell systems, in particular to a cooling system of an auxiliary group energy system of a full-power hydrogen fuel cell vehicle.
Background
In order to further realize energy conservation, improve environmental adaptability and improve the vehicle energy of the whole vehicle, the full-power fuel cell vehicle often needs to be matched with a power cell with a lower degree as an auxiliary energy source so as to meet the requirements of energy recovery, low-temperature starting and acceleration. The current classical fuel cell car power battery matches below 3 degrees electricity.
Despite the smaller power cell match, the power cell still requires a stringent operating temperature in order to ensure cell performance and life. This temperature range is generally narrow, typically between 20-40 ℃. Therefore, when the ambient temperature is low or the temperature of the battery itself is high, it is still necessary to cool or heat the power battery.
At present, many schemes for cooling or heating the battery are available, for example, a common scheme is to use a refrigerant to exchange heat for battery cooling liquid during cooling, and then drive the cooling liquid to flow through a battery pack for cooling through a water pump. The heating is performed by using PTC heating cooling liquid or by using a heating device inside the battery pack. These solutions find wide application in pure electric vehicles.
Disclosure of Invention
In view of the above, the invention provides a cooling system for an auxiliary group energy system of a full-power hydrogen fuel cell vehicle. The invention provides a cooling system of an auxiliary group energy system of a full-power hydrogen fuel cell vehicle, which comprises the following components:
the device comprises a water pump, a hydrogen pressure reducing valve, a one-way valve, a cold accumulator, a power battery, a temperature sensor, a proportional four-way valve and a controller;
the inlet of the water pump is connected with the outlet of the power battery through a pipeline; the outlet of the water pump is connected with the inlet of the hydrogen pressure reducing valve through a pipeline; the outlet of the hydrogen pressure reducing valve is connected with one end of the one-way valve through a pipeline; the other end of the one-way valve is connected with the inlet of the cold accumulator through a pipeline; the outlet of the cold accumulator is connected with the first end of the proportional four-way valve through a pipeline; the third end of the proportional four-way valve is connected with the power battery through a pipeline; the fourth end of the proportional four-way valve is connected with the outlet of the power battery through a pipeline; the hydrogen pressure reducing valve is connected with the one-way valve through a pipeline; the one-way valve is connected with the cold accumulator through a pipeline; the cold accumulator is connected with the proportional four-way valve through a pipeline; the proportional four-way valve is connected with an inlet of the power battery through a pipeline;
the temperature sensors comprise two temperature sensors, namely a first temperature sensor and a second temperature sensor; the power battery is electrically connected with the first temperature sensor and the second temperature sensor;
the controller is electrically connected with the control end of the water pump, the control end of the one-way valve, the temperature sensor and the control end of the proportional four-way valve;
the temperature sensor is used for storing cooling liquid; the cooling liquid is used for cooling the power battery and is driven by the water pump; the cooling liquid forms a cooling liquid loop through the cold accumulator, the proportional four-way valve, the power battery, the water pump and the hydrogen pressure reducing valve;
the one-way valve is used for controlling the on-off of the cooling liquid loop; the proportional four-way valve is used for controlling the flow of the cooling liquid.
Further, the second end of the proportional four-way valve is also connected with one end of the whole vehicle cooling loop through a pipeline; and the outlet of the power battery is also connected with the other end of the whole vehicle cooling loop through a pipeline.
Further, the water pump is any vehicle electronic water pump.
Further, the one-way valve and the proportional four-way valve are electromagnetic valves;
further, the hydrogen pressure reducing valve is also connected with a hydrogen bag; when the cooling liquid flows through the hydrogen pressure reducing valve, high-pressure hydrogen in the hydrogen gas bag is heated; the high-pressure hydrogen is heated to become low-pressure hydrogen, and the cold energy generated at the moment is absorbed by the cooling liquid; the temperature of the cooling liquid is reduced and stored by the regenerator.
Further, the first temperature sensor and the second temperature sensor measure the power cell inlet temperature and outlet temperature, respectively, when the coolant circulates.
Further, the system works as follows:
s101: the temperature sensor acquires the outlet temperature of the power battery, and when the outlet temperature exceeds the preset upper limit of the temperature threshold, the power battery is indicated to be required to be cooled, and the step S102 is performed;
s102: the controller controls the water pump to operate and opens the one-way valve;
s103: the controller controls the opening degrees of the first end, the third end and the fourth end of the proportional four-way valve according to the difference between the outlet temperature and the inlet temperature of the current power battery, so as to control the flow of the cooling liquid; the cooling liquid flows out through the cold accumulator and flows through the power battery through the proportional four-way valve, so that the temperature of the outlet of the power battery is reduced;
s104: when the outlet temperature of the power battery reaches a preset temperature standard, the temperature of the power battery is in a preset range, and at the moment, the controller controls the water pump to be powered off, and the one-way valve is closed;
s105: and the controller controls the proportional four-way valve to be completely switched off.
When the outlet temperature of the power battery is lower than the preset lower temperature threshold, the power battery is required to be heated, and the system works as follows:
s201: the controller controls the water pump to be disconnected with the one-way valve;
s202: the controller controls the valve at the first end of the cooling liquid loop of the proportional four-way valve to be turned off and opens the valves at the second end, the third end and the fourth end which are connected with the cooling loop of the whole vehicle;
s203: at this time, the power battery is heated through the whole vehicle cooling loop; the controller controls the opening of the proportional four-way valve according to the difference between the outlet temperature and the inlet temperature of the current power battery, so as to control the flow of cooling liquid of the whole vehicle cooling circuit and increase the outlet temperature of the power battery;
s204: when the outlet temperature of the power battery reaches a preset temperature standard, the temperature of the power battery is in a preset range, and at the moment, the controller controls the water pump to be powered off, and the one-way valve is closed;
s205: and the controller controls the proportional four-way valve to be completely switched off.
The technical scheme provided by the invention has the beneficial effects that: the hydrogen is heated, the thermal shock to the FCS system is reduced, the battery is cooled by utilizing the hydrogen cold energy, the normal and extreme working condition running requirements of the hydrogen fuel cell vehicle can be met in energy, and the energy of the whole vehicle is comprehensively utilized.
Drawings
FIG. 1 is a block diagram of a full power hydrogen fuel cell vehicle auxiliary energy system cooling system of the present invention;
FIG. 2 is a schematic diagram of a cooling circuit for a full power hydrogen fuel cell vehicle battery in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of a cooling circuit when the battery of the full-power hydrogen fuel cell vehicle needs to be cooled in an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a flowchart of a cooling system for an auxiliary energy system of a full-power hydrogen fuel cell vehicle, which specifically includes:
the hydrogen gas pressure reducing device comprises a water pump 1, a hydrogen gas pressure reducing valve 2, a one-way valve 3, a cold accumulator 4, a power battery 5, a temperature sensor, a proportional four-way valve 7 and a controller 8;
the inlet of the water pump 1 is connected with the outlet of the power battery 5 through a pipeline; the outlet of the water pump 1 is connected with the inlet of the hydrogen pressure reducing valve 2 through a pipeline; the outlet of the hydrogen pressure reducing valve 2 is connected with one end of the one-way valve 3 through a pipeline; the other end of the one-way valve 3 is connected with the inlet of the cold accumulator 4 through a pipeline; the outlet of the cold accumulator 4 is connected with the first end 71 of the proportional four-way valve 7 through a pipeline; the third end 73 of the proportional four-way valve 7 is connected with the power battery 5 through a pipeline; the hydrogen pressure reducing valve 2 is connected with the one-way valve 3 through a pipeline; the one-way valve 3 is connected with the cold accumulator 4 through a pipeline; the cold accumulator 4 is connected with the proportional four-way valve 7 through a pipeline; the proportional four-way valve 7 is connected with an inlet of the power battery 5 through a pipeline;
the temperature sensors comprise two temperature sensors, namely a first temperature sensor 61 and a second temperature sensor 62; the power battery 5 is electrically connected with the first temperature sensor 61 and the second temperature sensor 62;
the controller 8 is electrically connected with the control end of the water pump 1, the control end of the one-way valve 3, the temperature sensor and the control end of the proportional four-way valve 7;
the temperature sensor and the regenerator 4 are used for storing cooling liquid; the cooling liquid is used for cooling the power battery 5 and is driven by the water pump 1; the cooling liquid forms a cooling liquid loop through the cold accumulator 4, the proportional four-way valve 7, the power battery 5, the water pump 1 and the hydrogen pressure reducing valve 2;
the one-way valve 3 is used for controlling the on-off of the cooling liquid loop; the proportional four-way valve 7 is used for controlling the flow of the cooling liquid.
The second end 72 of the proportional four-way valve 7 is also connected with one end of the whole vehicle cooling loop through a pipeline; the outlet of the power battery 5 is also connected with the other end of the whole vehicle cooling loop through a pipeline.
The water pump 1 is any vehicle electronic water pump 1, and in this embodiment, the model of the electronic water pump is TA70.
The one-way valve 3 and the proportional four-way valve 7 are electromagnetic valves, in the embodiment, the model of the one-way valve 3 is SV8A, and the model of the proportional four-way valve 7 is DSG-01-02-0-C4; the model of the hydrogen pressure reducing valve 2 is YQQ-9; the regenerator 4 is any small-sized regenerator for vehicles;
the hydrogen pressure reducing valve 2 is also connected with a hydrogen bag; when the cooling liquid flows through the hydrogen pressure reducing valve 2, high-pressure hydrogen in the hydrogen bag is heated; the high-pressure hydrogen is heated to become low-pressure hydrogen, and the cold energy generated at the moment is absorbed by the cooling liquid; the temperature of the cooling liquid is lowered and stored by the regenerator 4.
The first temperature sensor 61 and the second temperature sensor 62 measure the inlet temperature and the outlet temperature of the power battery 5, respectively, when the cooling liquid circulates.
Referring to fig. 3, a schematic diagram of a cooling circuit of the full power hydrogen fuel cell vehicle battery in the embodiment of the invention when the battery needs to be cooled is shown in fig. 3; the working principle of the system is as follows:
s101: the temperature sensor acquires the outlet temperature of the power battery 5, and when the outlet temperature exceeds the preset upper limit of the temperature threshold, the power battery 5 is indicated to need to be cooled, and the step S102 is entered;
s102: the controller 8 controls the water pump 1 to operate and opens the one-way valve 3;
s103: the controller 8 controls the opening degrees of the first end 71, the third end 73 and the fourth end 74 of the proportional four-way valve 7 according to the difference between the outlet temperature and the inlet temperature of the current power battery 5, so as to control the flow rate of the cooling liquid; the cooling liquid flows out through the cold accumulator 4 and flows through the power battery 5 through the proportional four-way valve 7, so that the temperature of the outlet of the power battery 5 is reduced;
s104: when the outlet temperature of the power battery 5 reaches a preset temperature standard, the temperature of the power battery 5 is in a preset range, and at the moment, the controller 8 controls the water pump 1 to be powered off, and the one-way valve 3 is closed;
s105: the controller 8 controls all valves of the proportional four-way valve 7 to be completely closed.
Referring to fig. 2, a schematic diagram of a cooling circuit of the full power hydrogen fuel cell vehicle battery according to the embodiment of the invention when the battery needs to be heated is shown in fig. 2; when the outlet temperature of the power battery 5 is lower than the preset lower temperature threshold, it is indicated that the power battery 5 needs to be heated, and the system works as follows:
s201: the controller 8 controls the water pump 1 and the one-way valve 3 to be disconnected;
s202: the controller 8 controls the valve at the first end 71 of the cooling liquid circuit of the proportional four-way valve 7 to be turned off and opens the valve at the second end 72, the third end 73 and the fourth short end 74 which are connected with the cooling circuit of the whole vehicle;
s203: at this time, the power battery 5 is heated via the whole vehicle cooling circuit; the controller 8 controls the opening of the proportional four-way valve 7 according to the difference between the outlet temperature and the inlet temperature of the current power battery 5, so as to control the flow of cooling liquid of the whole vehicle cooling circuit and increase the outlet temperature of the power battery 5;
s204: when the outlet temperature of the power battery 5 reaches a preset temperature standard, the temperature of the power battery 5 is in a preset range, and at the moment, the controller 8 controls the water pump 1 to be powered off, and the one-way valve 3 is closed;
s205: the controller 8 controls all valves of the proportional four-way valve 7 to be completely closed.
The beneficial effects of the invention are as follows: the hydrogen is heated, the thermal shock to the FCS system is reduced, the battery is cooled by utilizing the hydrogen cold energy, the normal and extreme working condition running requirements of the hydrogen fuel cell vehicle can be met in energy, and the energy of the whole vehicle is comprehensively utilized.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A full-power hydrogen fuel cell car auxiliary group energy system cooling system which is characterized in that: the method specifically comprises the following steps: the hydrogen gas pressure reducing device comprises a water pump (1), a hydrogen gas pressure reducing valve (2), a one-way valve (3), a cold accumulator (4), a power battery (5), a temperature sensor, a proportional four-way valve (7) and a controller (8);
an inlet of the water pump (1) is connected with an outlet of the power battery (5) through a pipeline; the outlet of the water pump (1) is connected with the inlet of the hydrogen pressure reducing valve (2) through a pipeline; the outlet of the hydrogen pressure reducing valve (2) is connected with one end of the one-way valve (3) through a pipeline; the other end of the one-way valve (3) is connected with the inlet of the cold accumulator (4) through a pipeline; the outlet of the cold accumulator (4) is connected with the first end (71) of the proportional four-way valve (7) through a pipeline; a third end (73) of the proportional four-way valve (7) is connected with an inlet of the power battery (5) through a pipeline; the fourth end (74) of the proportional four-way valve (7) is connected with the outlet of the power battery (5) through a pipeline; the hydrogen pressure reducing valve (2) is connected with the one-way valve (3) through a pipeline; the one-way valve (3) is connected with the cold accumulator (4) through a pipeline; the cold accumulator (4) is connected with the proportional four-way valve (7) through a pipeline; the proportional four-way valve (7) is connected with an inlet of the power battery (5) through a pipeline;
the temperature sensors comprise two temperature sensors, namely a first temperature sensor (61) and a second temperature sensor (62); the power battery (5) is electrically connected with the first temperature sensor (61) and the second temperature sensor (62);
the controller (8) is electrically connected with the control end of the water pump (1), the control end of the one-way valve (3), the temperature sensor and the control end of the proportional four-way valve (7);
the temperature sensor is used for storing cooling liquid in the cold accumulator (4); the cooling liquid is used for cooling the power battery (5) and is driven by the water pump (1); the cooling liquid passes through the cold accumulator (4), the proportional four-way valve (7), the power battery (5), the water pump (1) and the hydrogen pressure reducing valve (2) to form a cooling liquid loop;
the one-way valve (3) is used for controlling the on-off of the cooling liquid loop; the proportional four-way valve (7) is used for controlling the flow of the cooling liquid.
2. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: the second end (72) of the proportional four-way valve (7) is also connected with one end of the whole vehicle cooling loop through a pipeline; and the outlet of the power battery (5) is also connected with the other end of the whole vehicle cooling loop through a pipeline.
3. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: the water pump (1) is any vehicle electronic water pump (1).
4. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: the one-way valve (3) and the proportional four-way valve (7) are electromagnetic valves.
5. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: the hydrogen pressure reducing valve (2) is also connected with a hydrogen bag; when the cooling liquid flows through the hydrogen pressure reducing valve (2), high-pressure hydrogen in the hydrogen gas bag is heated; the high-pressure hydrogen is heated to become low-pressure hydrogen, and the cold energy generated at the moment is absorbed by the cooling liquid; the temperature of the cooling liquid is reduced and stored by the regenerator (4).
6. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: the first temperature sensor (61) and the second temperature sensor (62) measure the inlet temperature and the outlet temperature of the power cell (5), respectively, when the cooling liquid circulates.
7. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: the working principle of the system is as follows:
s101: the temperature sensor acquires the outlet temperature of the power battery (5), and when the outlet temperature exceeds the preset upper limit of the temperature threshold, the power battery (5) needs to be cooled, and the step S102 is performed;
s102: the controller (8) controls the water pump (1) to operate and opens the one-way valve (3);
s103: the controller (8) controls the opening degrees of the first end (71), the third end (73) and the fourth end (74) of the proportional four-way valve (7) according to the difference between the outlet temperature and the inlet temperature of the current power battery (5), so as to control the flow rate of the cooling liquid; the cooling liquid flows out through the cold accumulator (4) and flows through the power battery (5) through the proportional four-way valve (7), so that the temperature of the outlet of the power battery (5) is reduced;
s104: when the outlet temperature of the power battery (5) reaches a preset temperature standard, the temperature of the power battery (5) is in a preset range, and at the moment, the controller (8) controls the water pump (1) to be powered off, and the one-way valve (3) is closed;
s105: the controller (8) controls all valves of the proportional four-way valve (7) to be completely closed.
8. The full power hydrogen fuel cell vehicle auxiliary group energy system cooling system according to claim 1, wherein: when the outlet temperature of the power battery (5) is lower than a preset lower temperature threshold, the power battery (5) needs to be heated, and the system works as follows:
s201: the controller (8) controls the water pump (1) to be disconnected with the one-way valve (3);
s202: the controller (8) controls the valve at the first end (71) of the cooling liquid loop of the proportional four-way valve (7) to be turned off, and opens the valves at the second end (72), the third end (73) and the fourth end (74) which are connected with the cooling loop of the whole vehicle;
s203: at this time, the power battery (5) is heated via the whole vehicle cooling circuit; the controller (8) controls the opening of the proportional four-way valve (7) according to the difference between the outlet temperature and the inlet temperature of the current power battery (5), so as to control the flow of cooling liquid of the whole vehicle cooling circuit and increase the outlet temperature of the power battery (5);
s204: when the outlet temperature of the power battery (5) reaches a preset temperature standard, the temperature of the power battery (5) is in a preset range, and at the moment, the controller (8) controls the water pump (1) to be powered off, and the one-way valve (3) is closed;
s205: the controller (8) controls all valves of the proportional four-way valve (7) to be completely closed.
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| CN112582639B (en) * | 2020-12-20 | 2024-07-23 | 武汉格罗夫氢能汽车有限公司 | Heat exchange system for heat management of fuel cell hydrogen energy automobile and control method |
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