CN114571941A - Thermal management system - Google Patents
Thermal management system Download PDFInfo
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- CN114571941A CN114571941A CN202011382425.5A CN202011382425A CN114571941A CN 114571941 A CN114571941 A CN 114571941A CN 202011382425 A CN202011382425 A CN 202011382425A CN 114571941 A CN114571941 A CN 114571941A
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- 239000007788 liquid Substances 0.000 claims abstract description 54
- 239000003507 refrigerant Substances 0.000 claims description 130
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 abstract description 38
- 239000000110 cooling liquid Substances 0.000 description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00321—Heat exchangers for air-conditioning devices
- B60H1/00328—Heat exchangers for air-conditioning devices of the liquid-air type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- 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
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
Abstract
A thermal management system is applied to a new energy automobile and comprises a compressor, a high-pressure cooler, an evaporator, a battery cooler, a gas-liquid separator and an ejector, wherein the ejector comprises a first inlet, a second inlet and an outlet; operating the battery within a predetermined operating range, taking into account the cooling requirements of the passenger compartment and increasing the overall thermal management system efficiency.
Description
Technical Field
The present invention relates to a system for use in a vehicle, and more particularly to a thermal management system.
Background
The system of the vehicle comprises a thermal management system, particularly for a new energy automobile, the battery needs to be cooled to ensure the working performance of the battery, meanwhile, the refrigeration requirement of a passenger compartment needs to be met, the working temperature of the battery needs to be within a certain range, the battery needs to be thermally managed in order to ensure that the battery works within a preset working temperature range, the thermal management system exchanges heat with the battery through a battery cooler to meet the working temperature requirement of the battery, and meanwhile, an evaporator is used for regulating the temperature of the passenger compartment. How to design a thermal management system that meets both battery cooling and passenger compartment cooling and thermal management efficiency requirements.
Disclosure of Invention
It is an object of the present invention to provide a thermal management system that operates a battery within a predetermined operating range, takes into account the cooling requirements of the passenger compartment and increases the overall thermal management system efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a thermal management system, thermal management system is applied to new energy automobile which characterized in that: the heat management system comprises a compressor, a high-pressure cooler, an evaporator, a battery cooler, a gas-liquid separator and an ejector, wherein the ejector comprises a first inlet, a second inlet and an outlet, the pressure of refrigerant at the outlet is greater than that of refrigerant at the second inlet, the first inlet is positioned at the downstream of the high-pressure cooler, the second inlet is connected with the downstream of the evaporator, one inlet of the battery cooler is positioned at the downstream of the outlet of the ejector, the gas-liquid separator comprises a first interface and a second interface, the first interface is an inlet of the gas-liquid separator, and the second interface is a gaseous refrigerant outlet of the gas-liquid separator; the inlet of the compressor is located downstream of the outlet of the ejector, the second interface of the gas-liquid separator is located between the outlet of the ejector and the inlet of the compressor, the outlet of the compressor is communicated with the inlet of the high-pressure cooler, and the upstream of the evaporator is provided with a flow valve.
The application provides a thermal management system, through set up the sprayer in thermal management system, the sprayer includes two imports, an export and exit channel, one of them import and high pressure cooler's export intercommunication, another import communicates with the export of evaporimeter, make two way refrigerants can make the pressure of refrigerant improve after the sprayer, the battery cooler is located the low reaches of the export of sprayer, the pressure of the refrigerant that gets into the battery cooler is higher than the refrigerant pressure of evaporimeter export, guarantee that the heat transfer temperature of battery cooler is in suitable scope, be favorable to improving the heat exchange efficiency of battery and guarantee that battery operating temperature is at reasonable within range, the import of compressor is located the sprayer low reaches simultaneously, be favorable to reducing the compression ratio of compressor, compressor power has been improved, and then optimize entire system's efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall system connections of a thermal management system;
FIG. 2 is a first system connection schematic of a thermal management system;
FIG. 3 is a second system connection diagram of the thermal management system;
FIG. 4 is a third system connection schematic of a thermal management system;
FIG. 5 is a fourth system connection schematic of a thermal management system;
FIG. 6 is a fifth system connection diagram of the thermal management system;
FIG. 7 is a sixth system connection schematic of a thermal management system;
FIG. 8 is a seventh system connection schematic of the thermal management system;
FIG. 9 is an eighth system connection schematic of a thermal management system;
FIG. 10 is a ninth system connection diagram of the thermal management system.
Detailed Description
The invention will be further described with reference to the following figures and specific examples:
the heat management system can be applied to the new energy automobile, and the heat management system comprises a carriage air conditioner part and a battery heat exchange part, on one hand, the heat exchange with the carriage is realized, on the other hand, the heat exchange with the battery is realized, when the heat exchange temperature of the battery is inappropriate, the service life of the battery is influenced, so that the battery can work in a preset temperature area through one set of heat management system, and the heat exchange efficiency of the battery can be improved, and the influence of cooling on the service life of the battery can be reduced. The working medium flowing in the thermal management system comprises a refrigerant, wherein the refrigerant comprises carbon dioxide, R134a and the like.
Fig. 1 is a connection block diagram of an overall embodiment of a thermal management system, which in this embodiment includes a compressor 1, a high-pressure cooler 2, an evaporator 5, a battery cooler 7, the gas-liquid separator 8 comprises an ejector 6 and a battery cooler 7, wherein the ejector 6 comprises a first inlet 61, a second inlet 62 and a first port 61, the pressure of the refrigerant at an outlet 63 of an outlet 63 is greater than the pressure of the refrigerant at the second inlet 62, the first inlet 61 is positioned at the downstream of the refrigerant flowing direction of the high-pressure cooler 2, the second inlet 62 is connected with the downstream of the refrigerant flowing direction of the evaporator 5, the gas-liquid separator 8 at least comprises a first interface 81 and a second interface 82, the first interface 81 is an inlet of the gas-liquid separator, the first interface 81 is positioned at the downstream of the refrigerant flowing direction of the outlet 63 of the ejector, the second interface 82 is a gaseous refrigerant outlet of the gas-liquid separator, and the inlet of the battery cooler 7 is positioned at the downstream of the refrigerant flowing direction of the outlet 63 of the ejector; the outlet of the compressor 1 is communicated with the inlet of the high-pressure cooler 7, the inlet of the compressor 1 is positioned at the downstream of the outlet 63 of the ejector, the second interface 82 of the gas-liquid separator is positioned at the inlet of the compressor 1 for communication, the refrigerant flow direction upstream of the evaporator 5 is provided with a first flow valve 4, and the first flow valve 4 can be throttled or opened and closed. The ejector 6 comprises two inlets 61, 62 and an outlet 63, wherein one inlet 61 is communicated with the outlet of the high-pressure cooler 2, the other inlet 62 is communicated with the outlet of the evaporator 5, so that the pressure of the refrigerant can be improved after the two paths of refrigerants pass through the ejector, the battery cooler 7 is positioned at the downstream of the outlet 63 of the ejector, the pressure of the refrigerant entering the battery cooler 7 is higher than the pressure of the refrigerant at the outlet of the evaporator 5, the heat exchange temperature of the battery cooler is ensured to be in a proper range, the heat exchange efficiency of the battery is favorably improved, the running temperature of the battery is ensured to be in a reasonable range, meanwhile, the inlet of the compressor is positioned at the downstream of the ejector, the compression ratio of the compressor is favorably reduced, the power of the compressor is improved, and the efficiency of the whole system is optimized.
The ejector 6 further comprises an electric control part, the electric control part comprises a shell and an electric control board, the electric control board can receive a whole automobile control signal of the new energy automobile and generate a control signal for controlling the ejector, and then the pressure of an outlet of the ejector is controlled.
In this embodiment, the battery cooler 7 is located downstream of the outlet of the ejector, and the battery cooler 7 is directly or indirectly connected with the outlet 63 of the ejector, and the direct connection of the battery cooler 7 with the outlet 63 of the ejector includes the battery cooler 7 and the outlet 63 of the ejector being directly connected through a pipeline or a connecting seat or forming an assembly, but a flow valve may be arranged between the battery cooler 7 and the outlet 63 of the ejector; the indirect connection of the battery cooler 7 to the outlet 63 of the ejector includes a gas-liquid separator provided between the ejector outlet and the battery cooler. The refrigerant entering the evaporator comprises refrigerant from the outlet of the ejector or/and a branch passage upstream of the ejector. The above embodiments are shown in solid and dashed lines in fig. 1. The above technical solutions are described below by examples.
Fig. 2 is a first embodiment of the thermal management system, which in this embodiment comprises a compressor 1, a high-pressure cooler 2, an ejector 6, a battery cooler 7, a gas-liquid separator 8, and an evaporator 5, wherein the evaporator 5 can exchange heat with the vehicle cabin, and the battery cooler 7 can exchange heat with the battery; the compressor 1 can suck and compress refrigerant, and the high-pressure cooler 2 exchanges heat between the refrigerant discharged from the compressor 1 and air outside the vehicle cabin, and in the embodiment, the ejector has a throttling function, a mixing function and a pressure boosting function, reduces the pressure of the refrigerant flowing from the high-pressure cooler, so as to suck the gaseous refrigerant which passes through the evaporator and evaporates from the second inlet, and thus increase the evaporating pressure of the battery cooler; the thermal management system of the present embodiment includes a branch passage, a branch point of which is located between the high-pressure cooler 2 and the first inlet 61 of the ejector, that is, upstream of the ejector, and which includes a first branch flow 51 through which a part of the refrigerant flows toward the first inlet 61 of the ejector, and a second branch flow 52 through which a part of the refrigerant enters the evaporator 5, and in the present embodiment, the first flow valve 4 is located upstream of the evaporator and the second branch flow is throttled or opened by the first flow valve 4. The battery cooler 7 is located between the ejector outlet 63 and the gas-liquid separator 8. An evaporator is provided as a low-pressure side heat exchanger for exchanging heat between air blown into a vehicle compartment and refrigerant to evaporate the refrigerant and thereby apply a cooling capacity, and a flow valve for reducing the pressure of the refrigerant sucked through the evaporator is provided on the upstream side of the refrigerant flow of the evaporator, thereby ensuring a reduction in the pressure in the evaporator and controlling the flow rate of the refrigerant flowing into the evaporator. In the figure, a mark 11 is a battery pack, a mark 12 is a battery cooling plate, a mark 13 is a water pump, a mark 15 is a cooling liquid loop, the battery cooler 7 in some embodiments is a double-channel heat exchanger, a working medium in one channel is a refrigerant, a working medium in the other channel is a cooling liquid, the cooling liquid exchanges heat with the refrigerant in the battery cooler 7, the water pump 13 provides flowing power for the cooling liquid loop, so that the cooling liquid after exchanging heat with the refrigerant enters the battery cooling plate 12, the battery cooling plate is in contact with the battery pack 12 for heat exchange, and the battery cooling plate 12 can be installed in a box body of the battery pack 11, is in direct contact with a battery and is used for cooling the battery pack; when the temperature of the battery pack meets the requirement of the working temperature of the battery, the water pump 13 is controlled to be in a closed state, when the temperature of the power battery exceeds the requirement of the working temperature of the battery, the water pump 13 is controlled to be started, and cooling liquid circulates in the liquid cooling loop 15, so that the temperature of the battery pack reaches the range of the normal working temperature of the battery. The coolant exchanges heat with the refrigerant in the battery cooler 7.
With the above-described thermal management system, when the compressor 1 is driven, vapor-phase refrigerant is sucked in through the suction side of the compressor 1, and the compressed refrigerant is discharged to the high-pressure cooler 2, the refrigerant passing through the high-pressure cooler 2 is divided into the first branch flow 51 flowing to the ejector and the second branch flow 52 passing through the first flow valve 4 and the evaporator, the refrigerant of the second branch flow 52 is sucked into the ejector 6 through the second inlet after passing through the evaporator, and is mixed with the refrigerant of the expanded first branch flow, and the refrigerant mixed and boosted by the ejector enters the battery cooler 7, which is advantageous in increasing the evaporation pressure of the battery cooler so that the battery cooler operates in a preset temperature range.
Thus, upstream of the ejector, the refrigerant is divided into a first branch flow and a second branch flow, and the flow rate of the second branch flow in the system is not completely controlled by the flow rate of the first branch flow of the ejector and is also influenced by the total flow rate of the system, so that the flow rate of the second branch flow can be adjusted by adjusting the flow rate of the whole system or adjusting the ejector; in addition, when the battery cooler is under a low load and the evaporator is under a high load, the flow of refrigerant to the evaporator is not limited by the flow of the first inlet of the ejector, but can be controlled by the total flow of the system, so as to improve the utilization rate of the refrigerant. .
Fig. 3 is a second embodiment of the thermal management system, in which a third flow valve 3 as a flow rate control means for controlling the flow rate of refrigerant is provided in the refrigerant circulation passage between the high-pressure cooler and the first branch flow and the second branch flow, and by providing the third flow valve 3 upstream of the branch point of the branch passage, the overall flow rate of refrigerant can be easily controlled without changing the flow rate ratio of the first branch flow and the second branch flow; or the flow ratio of the first branch flow and the second branch flow is adjusted without changing the overall flow; the flow rate can be distributed according to the load of the evaporator and the battery cooler, and the utilization rate of the refrigerant can be improved; the third flow rate valve 3 may be an electric flow rate control valve for variably controlling the flow rate of the refrigerant, or may be a fixed flow rate control valve. In this embodiment, the flow control valve is a three-way valve and controls the total flow rate, the flow rates of the first branch flow and the second branch flow, and the on/off of the branch passage. In the figure, a mark 11 is a battery pack, a mark 12 is a battery cooling plate, a mark 13 is a water pump, a mark 15 is a cooling liquid loop, the battery cooler 7 in some embodiments is a double-channel heat exchanger, a working medium in one channel is a refrigerant, a working medium in the other channel is a cooling liquid, the cooling liquid exchanges heat with the refrigerant in the battery cooler 7, the water pump 13 provides flowing power for the cooling liquid loop, so that the cooling liquid after exchanging heat with the refrigerant enters the battery cooling plate 12, the battery cooling plate is in contact with the battery pack 12 for heat exchange, and the battery cooling plate 12 can be installed in a box body of the battery pack 11, is in direct contact with a battery and is used for cooling the battery pack; when the temperature of the battery pack meets the requirement of the working temperature of the battery, the water pump 13 is controlled to be in a closed state, when the temperature of the power battery exceeds the requirement of the working temperature of the battery, the water pump 13 is controlled to be started, and cooling liquid circulates in the liquid cooling loop 15, so that the temperature of the battery pack reaches the range of the normal working temperature of the battery. The coolant exchanges heat with the refrigerant in the battery cooler 7.
With the above-described thermal management system, when the compressor 1 is driven, vapor-phase refrigerant is sucked in through the suction side of the compressor 1, and the compressed refrigerant is discharged to the high-pressure cooler 2, the refrigerant passing through the high-pressure cooler 2 is divided by the third flow valve 3 into the first branch flow 51 flowing to the ejector and the second branch flow 52 passing through the first flow valve 4 and the evaporator, the refrigerant of the second branch flow 52 is sucked into the ejector 6 through the second inlet after passing through the evaporator, and is mixed with the refrigerant of the expanded first branch flow, and the refrigerant whose pressure is increased by mixing with the ejector enters the battery cooler 7, which is advantageous for increasing the evaporation pressure of the battery cooler so that the battery cooler operates in a preset temperature range.
Fig. 4 shows a third embodiment of the thermal management system, in this embodiment, compared with the second embodiment, in this embodiment, one regenerator 10 is added, the regenerator 10 is located between the third flow valve 3 and the high-pressure cooler 2, and the refrigerant coming out of the high-pressure cooler 2 exchanges heat with the refrigerant flowing from the gas-liquid separator 8 to the compressor 1 in the regenerator 10, so that the temperature of the refrigerant before entering the third flow valve 3 and the ejector 6 is lower, and has a larger specific cooling capacity, so that the system performance is further improved.
Fig. 5 is a fourth embodiment of the thermal management system, which, in comparison with the first embodiment, corresponds to the division of the injector 6 into two parts, namely a flow control part 11 having throttling and flow control functions and a diffusion mixing part 12 having mixing and pressure boosting functions, the flow control part and the diffusion mixing part being formed separately, wherein the outlet of the evaporator is connected to the diffusion mixing part, which may be a throttle valve; the structure of the diffusion mixing part is relatively simple, and the manufacturing process is simple; of course, the structure of the ejector may be the same, and a flow control valve is added in front of the first inlet of the ejector, the flow control valve is a two-way valve, and the flow control valve may be an electric flow control valve for variably controlling the refrigerant flow, or a fixed flow control valve. The flow rate of the refrigerant passing through the first branch flow and the on/off state of the first branch flow are changed, and the flow rate of the refrigerant of the second branch flow is further influenced.
Fig. 6 is a fifth embodiment of the thermal management system, which in this embodiment comprises a compressor 1, a high-pressure cooler 2, an ejector 6, a battery cooler 7, a gas-liquid separator 8, and an evaporator 5, wherein the evaporator 5 can exchange heat with the vehicle cabin, and the battery cooler can exchange heat with the battery; the ejector 6 includes a first inlet 61, a second inlet 62, and an outlet 63, the gas-liquid separator 8 includes a first port 81, a second port 82, and a third port 83, the outlet of the compressor 1 communicates with the inlet of the high-pressure cooler 2, the outlet of the high-pressure cooler 2 communicates with the first inlet 61 of the ejector 6, the outlet 63 of the ejector 6 communicates with the inlet of the battery cooler 7, the outlet of the battery cooler 7 communicates with the first port 81 of the gas-liquid separator 8, the second port 82 of the gas-liquid separator 8 communicates with the inlet of the compressor 10, the third port 83 of the gas-liquid separator communicates with the inlet of the evaporator 5, the outlet of the evaporator 5 communicates with the second inlet 62 of the ejector 6, and the refrigerant entering the ejector 6 through the second inlet 62 and the refrigerant entering the ejector 6 through the first inlet 61 are mixed and enter the battery cooler 7. The above communication includes direct communication, communication through a pipe, communication through a third element, and communication with the third element through a pipe. Connect air conditioning system and battery heat transfer system through sprayer 6 like this, set up three intercommunication passageway at the sprayer, can reduce being connected of valve member and pipeline spare, the system is simplified, and flow control is realized to the sprayer simultaneously, and then the control is through the pressure of battery cooler and evaporimeter, can make the temperature that gets into the refrigerant of battery cooler can be in appropriate within range like this, is favorable to improving the heat exchange efficiency of battery and reduces the influence to the life-span of battery. The battery heat exchange system comprises a battery cooler, the air conditioning system comprises a compressor, a high-pressure cooler, an evaporator, a control valve and the like, the evaporator in the embodiment can be used for cooling the compartment, the evaporator can be additionally arranged between the high-pressure cooler and the first inlet for cooling the compartment, and the refrigerant entering the ejector through the first inlet in the embodiment is only one branch flow. In the figure, a mark 11 is a battery pack, a mark 12 is a battery cooling plate, a mark 13 is a water pump, a mark 15 is a cooling liquid loop, the battery cooler 7 in some embodiments is a double-channel heat exchanger, a working medium in one channel is a refrigerant, a working medium in the other channel is a cooling liquid, the cooling liquid exchanges heat with the refrigerant in the battery cooler 7, the water pump 13 provides flowing power for the cooling liquid loop, so that the cooling liquid after exchanging heat with the refrigerant enters the battery cooling plate 12, the battery cooling plate is in contact with the battery pack 12 for heat exchange, and the battery cooling plate 12 can be installed in a box body of the battery pack 11, is in direct contact with a battery and is used for cooling the battery pack; when the temperature of the battery pack meets the requirement of the working temperature of the battery, the water pump 13 is controlled to be in a closed state, when the temperature of the power battery exceeds the requirement of the working temperature of the battery, the water pump 13 is controlled to be started, and cooling liquid circulates in the liquid cooling loop 15, so that the temperature of the battery pack reaches the range of the normal working temperature of the battery. The coolant exchanges heat with the refrigerant in the battery cooler 7.
The heat exchange condition of the evaporator and the superheat condition after throttling are determined, so that the temperature of the battery cooler is favorably kept in a preset temperature range, and the working efficiency of the battery is higher in the temperature range; the temperature range may be, for example, 18 ℃ to 35 ℃. The battery cooler 7 may be disposed adjacent to the battery and directly exchanges heat with the battery through a refrigerant.
When the thermal management system works, high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the high-pressure cooler 2, the refrigerant passing through the high-pressure cooler 2 is cooled, then the refrigerant enters the ejector 6 through the first inlet 61 of the ejector 6, the refrigerant flowing out of the outlet 63 of the ejector 6 enters the battery cooler 7, the refrigerant passing through the battery cooler 7 enters the gas-liquid separator 8 through the first connector 81 of the gas-liquid separator 8, the refrigerant is divided into gas-phase refrigerant and liquid-phase refrigerant in the gas-liquid separator 8, the gas-phase refrigerant is sucked to the inlet of the compressor 1 through the second connector 82 of the gas-liquid separator, and the liquid-phase refrigerant enters the evaporator 5 through the third connector 83 of the gas-liquid separator; the refrigerant flowing through the evaporator 5 enters the ejector 6 through the second inlet 62 of the ejector, the refrigerant entering the ejector 6 through the second inlet 62 of the ejector is mixed with the refrigerant entering the ejector 6 through the first inlet 61 in the mixing portion, and the mixed refrigerant is diffused through the diffusing portion to enter the battery cooler 7. In this embodiment, the thermal management system further includes a first flow valve 4 disposed between the evaporator 5 and the gas-liquid separator 8, and the first flow valve 4 controls the on-off state and the flow rate of the flow path, specifically, the first flow valve 4 is mainly used for controlling the evaporation pressure of the evaporator 5, and when the flow rate of the evaporator 5 is too large or there is no load under a certain condition, the first flow valve 4 may also control the flow rate and the on-off state of the flow path. In the present embodiment, the flow rate of the evaporator depends on the flow rate of the ejector. It should be particularly noted that when the battery load is relatively low or no load is present, the evaporation amount of the refrigerant entering the battery cooler 7 is small, or no heat exchange occurs, which does not affect the operation of the entire system, and the entire system can be controlled by adjusting the flow rate of the first inlet of the ejector and the flow rate of the control valve entering the evaporator, so as to achieve efficient operation of the system; similarly, when the load of the air conditioner evaporator is relatively low or no load exists, the opening degree of the first flow valve 4 can be controlled to reduce or close the flow of the evaporator, the load of the battery cooler 7 is adjusted through the first inlet flow of the ejector 6, and the heat management system and the adjustable ejector are particularly suitable for the load characteristics and the control requirements of the heat management system of the electric automobile.
Fig. 7 shows a sixth embodiment of the thermal management system, in which a second flow valve 14 is provided downstream of the ejector outlet, the second flow valve 14 being a three-way valve, one outlet 142 of the second flow valve being connected to the battery cooler 7, and the other outlet 141 being connected to the inlet of the gas-liquid separator, as compared to the fifth embodiment. The refrigerant is discharged from the compressor 1, passes through the high-pressure cooler 2, enters a first inlet 61 of the ejector, the refrigerant from the evaporator 5 enters a second inlet 62 of the ejector, is mixed with the refrigerant at the first inlet and then enters a second flow valve 14, the second flow valve 14 can control the flow rate of the refrigerant passing through the battery cooler 7 and the on-off of a flow path of the battery cooler 7, the refrigerant passing through the battery cooler 7 flows into the gas-liquid separator 8, and finally the gas-phase refrigerant can return to the inlet of the compressor 1; the flow size of the battery cooler 7 and the on-off of a flow path of the battery cooler 7 can be controlled through the second flow valve 14, and then the cooling demand of the battery is matched, if the battery does not need to be cooled, the refrigerant is directly connected with the gas-liquid separator without passing through the battery cooler by adjusting the second flow valve 14, and when the battery needs to be cooled, the opening degree of the second flow valve can be controlled according to the cooling demand. Compared with the fourth embodiment, the flow rate of the battery cooler can be adjusted correspondingly according to the load of the battery cooler, and the heat exchange requirement of the battery can be better met. In addition, when the load on the evaporator is high, the refrigerant flow out of the ejector is large, and the flow is distributed according to the load on the battery cooler, so that the pressure loss caused by a large amount of refrigerant flowing through the battery cooler can be avoided.
Fig. 8 is a seventh embodiment of the thermal management system, in this embodiment, a battery cooler 7 is arranged in series with the evaporator 5, the battery cooler 7 is located on the upstream side of the evaporator 5, a fourth flow valve 9 is arranged upstream of the battery cooler 7, a first flow valve 4 is arranged on the downstream side of the battery cooler 7, the fourth flow valve 9 controls the flow of the refrigerant through the battery cooler, and the evaporation temperature of the battery cooler can also be controlled such that the evaporation temperature of the battery cooler is not limited to the ejector outlet pressure; the first flow valve 4 is a throttle valve; when the heat management system works, a refrigerant flows out of the compressor, passes through the high-pressure cooler, enters the first inlet of the ejector, is mixed with the refrigerant from the evaporator and then flows into the gas-liquid separator, a gas-phase refrigerant in the gas-liquid separator flows into the inlet of the compressor, a liquid-phase refrigerant enters the battery cooler through the first control valve, and after heat exchange with a battery is completed, the liquid-phase refrigerant flows into the evaporator through the second control valve, and the refrigerant coming out of the evaporator enters the second inlet of the ejector valve. In the figure, a mark 11 is a battery pack, a mark 12 is a battery cooling plate, a mark 13 is a water pump, a mark 15 is a cooling liquid loop, the battery cooler 7 in some embodiments is a double-channel heat exchanger, a working medium in one channel is a refrigerant, a working medium in the other channel is a cooling liquid, the cooling liquid exchanges heat with the refrigerant in the battery cooler 7, the water pump 13 provides flowing power for the cooling liquid loop, so that the cooling liquid after exchanging heat with the refrigerant enters the battery cooling plate 12, the battery cooling plate is in contact with the battery pack 12 for heat exchange, and the battery cooling plate 12 can be installed in a box body of the battery pack 11, is in direct contact with a battery and is used for cooling the battery pack; when the temperature of the battery pack meets the requirement of the working temperature of the battery, the water pump 13 is controlled to be in a closed state, when the temperature of the power battery exceeds the requirement of the working temperature of the battery, the water pump 13 is controlled to be started, and cooling liquid circulates in the liquid cooling loop 15, so that the temperature of the battery pack reaches the range of the normal working temperature of the battery. The coolant exchanges heat with the refrigerant in the battery cooler 7.
Fig. 9 is an eighth embodiment of the thermal management system, and in this embodiment, the main difference from the sixth embodiment is that: an adjustable three-way valve 16 and a bypass 161 are added in front of the evaporator 5, the ejector 6 has a boosting effect, the saturation temperature of the refrigerant after boosting by the ejector is increased, but in a battery liquid cooling system, the temperature is too high, so that the temperature of the battery is difficult to be reduced to the normal working temperature range. The flow through the evaporator 5 and the bypass 161 can be regulated by adding an adjustable three-way valve 16 before the evaporator. Because under some conditions, for example: under the working condition that the load of the evaporator is small and the load of the battery pack is large, the ejector has good pressure boosting capacity, the evaporating temperature of the battery cooler is possibly too high, and therefore the temperature of the battery is difficult to drop to a normal working range. While a bypass is added on the evaporator side, the adjustable three-way valve 16 is used to adjust the refrigerant flow required by the evaporator and the flow of the bypass 161 so that the flow into the evaporator meets the heat exchange required on the evaporator side, and the total flow into the second inlet 62 of the ejector can adjust the evaporation temperature of the battery cooler 7 within a suitable temperature range.
Fig. 10 is a ninth embodiment of a thermal management system, the main difference compared to the sixth embodiment is that: the battery cooler 7 and the battery pack 11 are in contact for heat exchange, namely the battery cooler 7 is a direct cooling plate, and the heat of the battery is directly taken away by the refrigerant, so that a cooling liquid loop is saved. Because the ejector 6 has the boosting effect, the saturation temperature of the refrigerant boosted by the ejector is increased, and the refrigerant can be directly used for the battery pack and used for cooling the battery pack. After the refrigerant flows out of the ejector, the refrigerant is divided by the adjustable three-way valve 14, and when the temperature of the battery pack meets the requirement of the working temperature of the battery, the adjustable three-way valve 14 is adjusted to enable the refrigerant to flow to the gas-liquid separator 8 through the branch 141; when the temperature of the power battery exceeds the requirement of the working temperature of the battery, the adjustable valve 14 is adjusted to enable the refrigerant to flow to the battery cooler 7 through the branch 142, so that the temperature of the battery pack reaches the range of the normal working temperature of the battery. The refrigerant in the branch 142 can be adjusted to the required refrigerant flow rate by using the adjustable three-way valve 14 according to the heat requirement of the battery.
It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a thermal management system, thermal management system is applied to new energy automobile which characterized in that: the thermal management system comprises a compressor, a high-pressure cooler, an evaporator, a battery cooler, a gas-liquid separator and an ejector; an outlet of the compressor is in communication with an inlet of the high pressure cooler, the ejector includes a first inlet, a second inlet, and an outlet, a pressure of refrigerant at the outlet is greater than a pressure of refrigerant at the second inlet; said first inlet being located downstream of said high pressure cooler, said second inlet being connected downstream of said evaporator, an inlet of said battery cooler being located downstream of an outlet of said ejector; the gas-liquid separator comprises a first interface and a second interface, the first interface is an inlet of the gas-liquid separator, and the second interface is a gaseous refrigerant outlet of the gas-liquid separator; the inlet of the compressor is located downstream of the outlet of the ejector, the second interface of the gas-liquid separator is located between the ejector outlet and the inlet of the compressor, and a first flow valve is arranged upstream of the evaporator.
2. The thermal management system of claim 1, wherein: the gas-liquid separator further comprises a third interface, an outlet of the high-pressure cooler is communicated with the first inlet of the ejector, an inlet of the battery cooler is communicated with an outlet of the ejector, an outlet of the battery cooler is communicated with the first interface of the gas-liquid separator, the second interface of the gas-liquid separator is communicated with an inlet of the compressor, the third interface of the gas-liquid separator is communicated with the evaporator through the first flow valve, an outlet of the evaporator is communicated with the second inlet of the ejector, and the refrigerant entering the ejector through the second inlet and the refrigerant entering the ejector through the first inlet are mixed and enter the battery cooler.
3. The thermal management system of claim 2, wherein: the thermal management system further comprises a second flow valve, the second flow valve is a three-way valve, an outlet of the ejector is communicated with a channel of the battery cooler or/and an inlet of the gas-liquid separator through the second flow valve, and an outlet of the battery cooler is communicated with the first interface of the gas-liquid separator; or the second flow valve can regulate the flow through the battery cooler.
4. The thermal management system of claim 1, wherein: the thermal management system includes a first branch flow and a second branch flow, a branch point of the first branch flow and the second branch flow is located downstream of the high-pressure cooler, a first inlet of the ejector is located in the first branch flow, the first flow valve and the evaporator are located in the second branch flow, and a flow passage of the battery cooler is located between an outlet of the ejector and a first port of the gas-liquid separator.
5. The thermal management system of claim 4, wherein: the thermal management system further comprises a third flow valve, the third flow valve is a three-way valve and is located at the branch node, and the third flow valve controls the high-pressure cooler to be communicated with the first branch or the second branch or controls the flow of the first branch or the second branch.
6. The thermal management system of claim 5, wherein: the heat management system also comprises a heat regenerator, the heat regenerator is positioned between the flow control valve and the high-pressure cooler, and the refrigerant at the outlet of the high-pressure cooler exchanges heat with the refrigerant flowing to the compressor from the outlet of the gas-liquid separator in the heat regenerator.
7. The thermal management system of claim 4, wherein: the thermal management system further comprises the ejector comprising a flow control part and a diffusion mixing part, the flow control part and the diffusion mixing part are respectively shaped, the outlet of the evaporator is connected with the diffusion mixing part, and the flow control part is a throttle valve.
8. The thermal management system of claim 1, wherein: the gas-liquid separator further comprises a third interface, an outlet of the ejector is communicated with the first interface of the gas-liquid separator, an inlet of the battery cooler is located at the downstream of the third interface of the gas-liquid separator, the thermal management system further comprises a fourth flow valve, the fourth flow valve is a two-way valve, the fourth flow valve is located between a flow channel of the battery cooler and the third interface of the gas-liquid separator, and the first flow valve is located between a flow channel of the battery cooler and the evaporator.
9. The thermal management system of any of claims 1-8, wherein: the ejector further comprises an electric control part, the electric control part comprises a shell and an electric control board, and the electric control board can receive the whole vehicle control signal of the new energy vehicle and generate a control signal for controlling the ejector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011382425.5A CN114571941A (en) | 2020-12-01 | 2020-12-01 | Thermal management system |
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| CN202011382425.5A CN114571941A (en) | 2020-12-01 | 2020-12-01 | Thermal management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115084715A (en) * | 2022-07-29 | 2022-09-20 | 智己汽车科技有限公司 | Battery cooling system, cooling method and automobile |
| CN116742200A (en) * | 2023-08-08 | 2023-09-12 | 江苏中关村科技产业园节能环保研究有限公司 | Vehicle cooling system based on refrigerant injection cycle and working method thereof |
-
2020
- 2020-12-01 CN CN202011382425.5A patent/CN114571941A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115084715A (en) * | 2022-07-29 | 2022-09-20 | 智己汽车科技有限公司 | Battery cooling system, cooling method and automobile |
| CN115084715B (en) * | 2022-07-29 | 2024-05-14 | 智己汽车科技有限公司 | Battery cooling system, cooling method and automobile |
| CN116742200A (en) * | 2023-08-08 | 2023-09-12 | 江苏中关村科技产业园节能环保研究有限公司 | Vehicle cooling system based on refrigerant injection cycle and working method thereof |
| CN116742200B (en) * | 2023-08-08 | 2023-11-03 | 江苏中关村科技产业园节能环保研究有限公司 | Vehicle cooling system based on refrigerant injection cycle and working method thereof |
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