CN113561731B - Whole car thermal management system and electric motor car - Google Patents
Whole car thermal management system and electric motor car Download PDFInfo
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- CN113561731B CN113561731B CN202110833469.3A CN202110833469A CN113561731B CN 113561731 B CN113561731 B CN 113561731B CN 202110833469 A CN202110833469 A CN 202110833469A CN 113561731 B CN113561731 B CN 113561731B
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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
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
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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
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
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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
- B60H1/00321—Heat exchangers for air-conditioning devices
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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
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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
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The invention belongs to the technical field of electric vehicles, and discloses a whole vehicle thermal management system and a vehicle; the whole car heat management system comprises: the system comprises a refrigerant circulation system, a warm air water circulation system, a battery water circulation system, a motor water circulation system, a first heat exchange element, a second heat exchange element, a third heat exchange element and a four-way valve; the refrigerant circulation system is coupled with the warm air water circulation system through the first heat exchange element; the refrigerant circulation system is coupled with the battery water circulation system through the second heat exchange element; the warm air water circulation system is coupled with the battery water circulation system through the third heat exchange element; the battery water circulation system is connected with the motor water circulation system through the four-way valve. The whole vehicle heat management system provided by the invention can optimize the heat management structure of the electric vehicle, ensure the endurance capacity, optimize the cooling and heating effects of the vehicle and improve the electric energy utilization rate.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a whole vehicle thermal management system and an electric vehicle.
Background
The low-temperature endurance mileage of the pure electric vehicle is reduced by four times or even half compared with that of the pure electric vehicle under the normal-temperature condition. The main reason is that, first, the capacity of the battery decays in a low-temperature environment, resulting in a decrease in the total amount of electricity that the battery can ultimately discharge; secondly, in order to ensure the thermal comfort of the passenger cabin in a low-temperature environment, the passenger cabin needs to be heated by the output electric quantity of the battery, and the electric quantity consumption is high. In addition, under other temperature conditions, some working conditions can also appear to influence the life mileage of the pure electric vehicle.
Disclosure of Invention
The invention provides a whole vehicle thermal management system and an electric vehicle, which solve the technical problem that the endurance mileage of the electric vehicle is greatly affected by temperature in the prior art.
In order to solve the technical problems, the invention provides a whole vehicle thermal management system, which comprises: the system comprises a refrigerant circulation system, a warm air water circulation system, a battery water circulation system, a motor water circulation system, a first heat exchange element, a second heat exchange element, a third heat exchange element and a four-way valve;
the refrigerant circulation system is coupled with the warm air water circulation system through the first heat exchange element;
the refrigerant circulation system is coupled with the battery water circulation system through the second heat exchange element;
the warm air water circulation system is coupled with the battery water circulation system through the third heat exchange element;
the battery water circulation system is connected with the motor water circulation system through the four-way valve.
Further, the refrigerant cycle system includes: the device comprises a compressor, an outdoor heat exchanger, a gas-liquid separator, a coaxial pipe and an evaporator;
the output end of the compressor is connected with the flow channel input end of the outdoor heat exchanger, the flow channel output end of the outdoor heat exchanger is connected with the input end of the gas-liquid separator through a third stop valve, and the output end of the gas-liquid separator is connected with the input end of the compressor;
the flow channel output end of the outdoor heat exchanger is connected with the input end of the first flow channel of the coaxial pipe, the output end of the first flow channel of the coaxial pipe is connected with the flow channel input end of the evaporator, the flow channel output end of the evaporator is connected with the input end of the second flow channel of the coaxial pipe, and the output end of the second flow channel of the coaxial pipe is connected with the input end of the gas-liquid separator;
the first flow channel of the first heat exchange element is connected in series between the output end of the compressor and the flow channel input end of the outdoor heat exchanger;
the input end of the first flow channel of the second heat exchange element is connected with the output end of the first flow channel of the coaxial pipe, and the output end of the first flow channel of the second heat exchange element is connected with the input end of the second flow channel of the coaxial pipe.
Further, a first electronic expansion valve is connected in series between the output end of the first flow channel of the first heat exchange element and the flow channel input end of the outdoor heat exchanger, and two ends of the first electronic expansion valve are connected with a first stop valve in parallel;
the output end of the first flow channel of the first heat exchange element is connected with the input end of the first flow channel of the coaxial pipe through a second stop valve;
a second electronic expansion valve is arranged at the runner input end of the evaporator;
and a third electronic expansion valve is arranged at the runner input end of the second heat exchange element.
Further, the outdoor radiator is provided with a heat radiation fan.
Further, a blower is disposed at one side of the evaporator.
Further, the warm air water circulation system includes: the water heater comprises a warm air water pump, a water heater, a first three-way water valve and a warm air core body;
the output end of the warm air water pump is connected with the input end of the second runner of the first heat exchange element, the output end of the second runner of the first heat exchange element is connected with the input end of the water heater, the output end of the water heater is connected with the runner input end of the warm air core, the runner output end of the warm air core is connected with the first port of the first three-way water valve, the second port of the first three-way water valve is connected with the input end of the warm air water pump, and the third port of the first three-way water valve is connected with the input end of the warm air water pump through the first runner of the third heat exchange element.
Further, the warm air core is arranged on the air outlet side of the blower.
Further, the battery water circulation system includes: a battery water pump, a battery pack cooling element and a second three-way water valve;
the output end of the battery water pump is connected with the flow channel input end of the battery pack cooling element, the flow channel output end of the battery pack cooling element is connected with the input end of the second flow channel of the third heat exchange element, the output end of the second flow channel of the third heat exchange element is connected with the fourth port of the four-way valve through the second flow channel of the second heat exchange element, the third port of the four-way valve is connected with the first port of the second three-way water valve, the second port of the second three-way water valve is connected with the input end of the second flow channel of the third heat exchange element, and the third port of the second three-way water valve is connected with the input end of the battery water pump.
Further, the motor water circulation system includes: the motor water pump, the motor cooling element, the third three-way water valve and the low-temperature radiator;
the output end of the motor water pump is connected with the first port of the third three-way water valve through the runner of the motor cooling element, the second port of the third three-way water valve is connected with the runner input end of the low-temperature radiator, and the runner output end of the low-temperature radiator is connected with the input end of the motor water pump;
and a third port of the third three-way valve is connected with the first port of the four-way valve, and a second port of the four-way valve is connected with the input end of the motor water pump.
An electric vehicle, comprising: the whole car heat management system is characterized by comprising a whole car heat management system.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
according to the whole vehicle heat management system and the electric vehicle, the refrigerant circulation system, the warm air water circulation system, the battery water circulation system and the motor water circulation system are established, the refrigerant circulation system and the warm air water circulation system are coupled through the first heat exchange element, the refrigerant circulation system and the battery water circulation system are coupled through the second heat exchange element, the warm air water circulation system and the battery water circulation system are coupled through the third heat exchange element, and the battery water circulation system and the motor water circulation system are connected through the four-way valve, so that heat transfer among the circulation systems is realized, and therefore, when functional modes such as passenger cabin refrigeration, passenger cabin heating, passenger cabin dehumidification, battery cooling, battery heating, mixed refrigeration, mixed heating, motor cooling and defrosting of an outdoor heat exchanger are realized, the combination of the functional modes can be simultaneously realized, and therefore, comfort and practicability are met, high-effect application of heat under a low-temperature working condition can be met, and influence of low-temperature on a range is reduced; thereby achieving the effect of optimizing the efficient utilization of the electric energy of the electric vehicle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a whole vehicle thermal management system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings.
According to the whole-vehicle thermal management system and the electric vehicle, the technical problem that the electric vehicle endurance mileage of the electric vehicle is greatly affected by temperature in the prior art is solved.
In order to better understand the above technical solutions, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and it should be understood that specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, an overall vehicle thermal management system, comprising: the refrigerant circulation system 100, the warm air water circulation system 200, the battery water circulation system 300, the motor water circulation system 400, the first heat exchange element 32, the second heat exchange element 15, the third heat exchange element 21, and the four-way valve 28 for coupling heat transfer between the circulation systems.
Specifically, the refrigerant circulation system 100 is coupled with the warm air water circulation system 200 through the first heat exchange element 32; so that heat can be transferred between them via said first heat exchanging element 32. In this embodiment, the first heat exchange element 32 is a water-cooled condenser.
The refrigerant circulation system 100 is coupled with the battery water circulation system 300 through the second heat exchange element 15; so that heat transfer between the two can take place via said second heat exchanging element 15. In this embodiment, the second heat exchange element 15 is a first plate heat exchanger.
The warm air water circulation system 200 is coupled with the battery water circulation system 300 through the third heat exchange element 21; so that heat transfer between the two can take place via said third heat exchanging element 21. In this embodiment, the third heat exchanging element 21 is a second plate heat exchanger.
The battery water circulation system 300 is connected to the motor water circulation system 400 through the four-way valve 28, thereby gating the battery water circulation system 300 and the motor water circulation system 400 according to a heat control mode.
Specifically, the main functional components of the refrigerant cycle system 100 include: a compressor 1, an outdoor heat exchanger 5, a gas-liquid separator 9, a coaxial pipe 10, and an evaporator 12.
The output end of the compressor 1 is connected with the flow channel input end of the outdoor heat exchanger 5, the flow channel output end of the outdoor heat exchanger 5 is connected with the input end of the gas-liquid separator 9 through a third stop valve 8, and the output end of the gas-liquid separator 9 is connected with the input end of the compressor 1; the flow channel output end of the outdoor heat exchanger 5 is connected with the input end of the first flow channel of the coaxial pipe 10, the output end of the first flow channel of the coaxial pipe 10 is connected with the flow channel input end of the evaporator 12, the flow channel output end of the evaporator 12 is connected with the input end of the second flow channel of the coaxial pipe 10, and the output end of the second flow channel of the coaxial pipe 12 is connected with the input end of the gas-liquid separator 9; the first flow channel of the first heat exchange element 32 is connected in series between the output end of the compressor 1 and the flow channel input end of the outdoor heat exchanger 5; the input end of the first flow channel of the second heat exchange element 15 is connected with the output end of the first flow channel of the coaxial tube 10, and the output end of the first flow channel of the second heat exchange element 15 is connected with the input end of the second flow channel of the coaxial tube 10.
Similarly, a first electronic expansion valve 3 is connected in series between the output end of the first flow channel of the first heat exchange element 32 and the flow channel input end of the outdoor heat exchanger 5, and two ends of the first electronic expansion valve 3 are connected in parallel with a first stop valve 2; the output end of the first flow channel of the first heat exchange element 32 is connected with the input end of the first flow channel of the coaxial pipe 10 through a second stop valve 7; a second electronic expansion valve 11 is arranged at the runner input end of the evaporator 12; a third electronic expansion valve 14 is arranged at the flow channel input end of the second heat exchange element 15.
In order to facilitate heat dissipation and cooling, the outdoor radiator 5 is provided with a heat dissipation fan 4 for heat flow. A blower 13 is disposed on one side of the evaporator 12.
Further, the warm air water circulation system 200 includes: a warm air water pump 19, a water heater 16, a first three-way water valve 18 and a warm air core 17.
The output end of the warm air water pump 19 is connected with the input end of the second runner of the first heat exchange element 32, the output end of the second runner of the first heat exchange element 32 is connected with the input end of the water heater 16, the output end of the water heater 16 is connected with the runner input end of the warm air core 17, the runner output end of the warm air core 17 is connected with the first port of the first three-way water valve 18, the second port of the first three-way water valve 18 is connected with the input end of the warm air water pump 19, and the third port of the first three-way water valve 18 is connected with the input end of the warm air water pump 19 through the first runner of the third heat exchange element 21.
In order to facilitate blowing out of the hot air, the warm air core 17 is provided on the air outlet side of the blower 13.
Further, the battery water circulation system 300 includes: a battery water pump 30, a battery pack cooling element 31, and a second three-way water valve 29.
The output end of the battery water pump 30 is connected with the flow channel input end of the battery pack cooling element 31, the flow channel output end of the battery pack cooling element 31 is connected with the input end of the second flow channel of the third heat exchange element 21, the output end of the second flow channel of the third heat exchange element 21 is connected with the fourth port of the four-way valve 28 through the second flow channel of the second heat exchange element 15, the third port of the four-way valve 28 is connected with the first port of the second three-way water valve 29, the second port of the second three-way water valve 29 is connected with the input end of the second flow channel of the third heat exchange element 21, and the third port of the second three-way water valve 29 is connected with the input end of the battery water pump 30.
Similarly, the motor water circulation system 400 includes: a motor water pump 22, a motor cooling element, a third three-way water valve 26, and a low temperature radiator 6. Wherein the motor cooling element mainly comprises: the DCDC heat exchange element 23, the MCU heat exchange element 24 and the driving motor heat exchange element 25.
The output end of the motor water pump 22 is connected with the first port of the third three-way water valve 26 through the runner of the motor cooling element, the second port of the third three-way water valve 26 is connected with the runner input end of the low-temperature radiator 6, and the runner output end of the low-temperature radiator 6 is connected with the input end of the motor water pump 22; the third port of the third three-way valve 26 is connected to the first port of the four-way valve 28, and the second port of the four-way valve 28 is connected to the input end of the motor water pump 22.
The whole car thermal management system that this embodiment provided still includes: an air conditioning box and a front end module electronic fan. The evaporator 12 and the warm air core 17 are arranged in the air conditioning cabinet.
It should be noted that, in order to facilitate the replenishment of the circulating refrigerant, the motor water circulation system 400 and the warm air water circulation system 200 are correspondingly connected with the first water replenishing kettle 27 and the second water replenishing kettle 20, respectively.
The embodiment also provides an electric vehicle based on the whole vehicle thermal management system.
The operation thereof will be described in detail below.
When the refrigerant circulation system 100 heats, the compressor 1 can compress the low-temperature low-pressure gaseous refrigerant into the high-temperature high-pressure gaseous refrigerant. The first flow passage and the second flow passage of the water-cooled condenser 32 respectively circulate refrigerant and antifreeze, and heat exchange is performed between the refrigerant and the antifreeze in the warm air water system loop, so that the high-temperature and high-pressure gaseous refrigerant is liquefied and condensed into high-temperature and high-pressure liquid refrigerant, and the antifreeze in the warm air water system loop is heated; then the first stop valve 2 is closed, so that the refrigerant can only be throttled and expanded by the first electronic expansion valve 3, evaporation and heat absorption are carried out at the outdoor heat exchanger 5, and the cooling fan 4 drives air to flow at the moment, so that the heat exchange effect is improved. The refrigerant then returns to the compressor 1 through the third shut-off valve 8 and the gas-liquid separator 9, completing the cycle.
When the refrigerant circulation system 100 is refrigerating, the compressor 1 may compress a low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant; the refrigerant passes through the water-cooled condenser 32, at this time, the cooling liquid in the warm air water circulation system 200 does not flow, almost no heat exchange exists, and the refrigerant is still in a gaseous state; then the first stop valve 2 is opened, the refrigerant flows to the outdoor heat exchanger 5 through the first stop valve 2, and exchanges heat with air at the outdoor heat exchanger 5 to be condensed into liquid, and at the moment, the cooling fan 4 drives the air to flow, so that the heat exchange effect is improved. Then the refrigerant flows to the second electronic expansion valve 11 through the coaxial pipe 10 to throttle, evaporates at the evaporator 12, absorbs heat in the air to generate low-temperature air, and blows the cold air to the passenger cabin through the blower 13 to generate a refrigerating effect. The refrigerant passes through the coaxial pipe 10 again after passing through the evaporator 12, and at this time, the liquid refrigerant and the gaseous refrigerant are respectively arranged in the coaxial pipe 10, wherein the temperature of the liquid refrigerant is higher, the temperature of the gaseous refrigerant is increased through heat exchange, and the liquid temperature is reduced, so that the refrigeration performance of the whole vehicle is facilitated. Finally, the refrigerant returns to the compressor 1 through the gas-liquid separator 9.
In the actual vehicle use process, the whole vehicle use working condition is more complex, and the heat pump type whole vehicle heat management system needs to be matched with a control strategy to realize the heat management function. The following list some of the overall thermal management system functions in a common environment.
Under the high-temperature driving condition, which is generally more than 30 ℃, the passenger cabin air conditioner is started for refrigeration, and the refrigerant circulation system 100 works at the moment.
The compressor 1 pumps out the refrigerant, and the refrigerant flows through the first heat exchange element 32, the first stop valve 2, the outdoor heat exchanger 5, the coaxial pipe 10, the second electronic expansion valve 11, the evaporator 12, the coaxial pipe 10, the gas-liquid separator 9, and then returns to the compressor 1. Wherein the first heat exchange element 32 does not exchange heat, the first electronic expansion valve 3 is closed, the outdoor heat exchanger 5 condenses and radiates heat, the outdoor heat exchanger 4 is opened, the third stop valve 8 is closed, and the third motor expansion valve 14 is closed.
If the battery temperature is monitored to be too high during driving, the second electronic expansion valve 11 and the third electronic expansion valve 14 are simultaneously opened after the refrigerant passes through the component outdoor heat exchanger 5, and the refrigerant simultaneously flows through the evaporator 12 and the first heat exchange element 15 and then commonly flows through the coaxial pipe 10. At the same time, the battery water circulation circuit 300 also operates synchronously, and the antifreeze flows out from the battery water pump 30, the battery pack cooling element 31, the third heat exchange element 21, the first heat exchange element 15, the four-way valve 28, and the second three-way valve 29. Wherein, the third heat exchange element 21 does not exchange heat, the first port and the second port of the four-way valve 28 are communicated, the third port and the fourth port of the four-way valve 28 are communicated, and the first port and the second port of the second three-way valve 29 are communicated.
Under driving conditions, the motor also needs to dissipate heat at this time, and the cooling liquid of the motor water circulation system 400 circulates. The motor water pump 22 pumps out the cooling liquid, flows through the DCDC heat exchange element 23, the MCU heat exchange element 24, the driving motor heat exchange element 25, the third three-way valve 26, the low-temperature radiator 6 and the motor water pump 22. Wherein the first port and the second port of the third three-way valve 26 are in communication.
Under the normal temperature driving working condition, the temperature is specifically 15-30 ℃, the passenger cabin and the battery pack do not need to be heated, and only the electric drive is used for radiating through the low-temperature radiator 6. The motor water pump 22 pumps out the cooling liquid, flows through the heat exchange element 23 of DCDC, the MCU heat exchange element 24, the driving motor heat exchange element 25, the third three-way valve 26, the low-temperature radiator 6 and then flows back to the motor water pump 2. Wherein the first port and the second port of the third three-way valve 26 are in communication.
Under the working condition of low-temperature driving, the temperature is specifically-10 ℃ to 15 ℃, the air conditioner heating of the passenger cabin is started, and the flow direction of the refrigerant system is as follows:
the heat exchanger comprises a compressor 1, a first heat exchange element 32, a first electronic expansion valve 3, an outdoor heat exchanger 5, a third stop valve 8, a gas-liquid separator 9 and the compressor 1. At the same time, the warm air water circulation circuit 200 is turned on to heat the passenger compartment, and the system flows down as follows: a warm air water pump 19, a first heat exchange element 32, a water heater 16, a first three-way valve 18 and a warm air water pump 19. Wherein, the high temperature refrigerant at the first heat exchange element 32 is liquefied and released, the first stop valve 2 is closed, the outdoor heat exchanger 5 is evaporated and absorbed, the cooling fan 4 is opened, and the first port and the second port of the first three-way valve 18 are communicated.
The motor loop may have multiple modes, and when the battery and motor water temperatures are low, the refrigerant flow direction of the motor water circulation system 400 is as follows: the motor water pump 22, the DCDC heat exchange element 23, the MCU heat exchange element 24, the driving motor heat exchange element 25, the third three-way valve 26 and the four-way valve 28 (at the moment, 12 and 34 are respectively communicated), and the motor water pump 22. Wherein the first port and the third port of the third three-way valve 26 are communicated, the first port and the second port of the four-way valve 28 are communicated, and the third port and the fourth port of the four-way valve 28 are communicated.
When the temperature of the motor water is higher and the temperature of the battery is lower, the refrigerant of the motor water circulation system 400 flows to the following parts, namely the motor water pump 22, the heat exchange element 23 of DCDC, the MCU heat exchange element 24, the driving motor heat exchange element 25, the third three-way valve 26, the four-way valve 28, the second three-way valve 29, the battery water pump 30, the battery pack cooling element 31, the motor water pump 22, the third heat exchange element 21, the second heat exchange element 15, the four-way valve 28 and the motor water pump 22. Wherein, the first port and the third port of the third three-way valve 26 are communicated, the first port and the third port of the four-way valve 28 are communicated, the second port and the fourth port of the four-way valve 28 are communicated, the first port and the second port of the second three-way valve 29 are communicated, the battery water pump 30 and the battery pack cooling element 31 heat the battery pack by using the motor waste heat.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
according to the whole vehicle heat management system and the electric vehicle, the refrigerant circulation system, the warm air water circulation system, the battery water circulation system and the motor water circulation system are established, the refrigerant circulation system and the warm air water circulation system are coupled through the first heat exchange element, the refrigerant circulation system and the battery water circulation system are coupled through the second heat exchange element, the warm air water circulation system and the battery water circulation system are coupled through the third heat exchange element, and the battery water circulation system and the motor water circulation system are connected through the four-way valve, so that heat transfer among the circulation systems is realized, and therefore, when functional modes such as passenger cabin refrigeration, passenger cabin heating, passenger cabin dehumidification, battery cooling, battery heating, mixed refrigeration, mixed heating, motor cooling and defrosting of an outdoor heat exchanger are realized, the combination of the functional modes can be simultaneously realized, and therefore, comfort and practicability are met, high-effect application of heat under a low-temperature working condition can be met, and influence of low-temperature on a range is reduced; thereby achieving the effect of optimizing the efficient utilization of the electric energy of the electric vehicle.
In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification
While the preferred embodiments of the present application 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. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (9)
1. An overall vehicle thermal management system, comprising: the system comprises a refrigerant circulation system, a warm air water circulation system, a battery water circulation system, a motor water circulation system, a first heat exchange element, a second heat exchange element, a third heat exchange element and a four-way valve;
the refrigerant circulation system is coupled with the warm air water circulation system through the first heat exchange element;
the refrigerant circulation system is coupled with the battery water circulation system through the second heat exchange element;
the warm air water circulation system is coupled with the battery water circulation system through the third heat exchange element;
the battery water circulation system is connected with the motor water circulation system through the four-way valve;
wherein the refrigerant cycle system includes: the device comprises a compressor, an outdoor heat exchanger, a gas-liquid separator, a coaxial pipe and an evaporator;
the output end of the compressor is connected with the flow channel input end of the outdoor heat exchanger, the flow channel output end of the outdoor heat exchanger is connected with the input end of the gas-liquid separator through a third stop valve, and the output end of the gas-liquid separator is connected with the input end of the compressor;
the flow channel output end of the outdoor heat exchanger is connected with the input end of the first flow channel of the coaxial pipe, the output end of the first flow channel of the coaxial pipe is connected with the flow channel input end of the evaporator, the flow channel output end of the evaporator is connected with the input end of the second flow channel of the coaxial pipe, and the output end of the second flow channel of the coaxial pipe is connected with the input end of the gas-liquid separator;
the first flow channel of the first heat exchange element is connected in series between the output end of the compressor and the flow channel input end of the outdoor heat exchanger;
the input end of the first flow channel of the second heat exchange element is connected with the output end of the first flow channel of the coaxial pipe, and the output end of the first flow channel of the second heat exchange element is connected with the input end of the second flow channel of the coaxial pipe.
2. The whole vehicle thermal management system according to claim 1, wherein a first electronic expansion valve is connected in series between the output end of the first runner of the first heat exchange element and the runner input end of the outdoor heat exchanger, and two ends of the first electronic expansion valve are connected with a first stop valve in parallel;
the output end of the first flow channel of the first heat exchange element is connected with the input end of the first flow channel of the coaxial pipe through a second stop valve;
a second electronic expansion valve is arranged at the runner input end of the evaporator;
and a third electronic expansion valve is arranged at the runner input end of the second heat exchange element.
3. The overall vehicle thermal management system of claim 1, wherein the outdoor heat exchanger is configured with a radiator fan.
4. The vehicle thermal management system of claim 2, wherein the evaporator side is configured with a blower.
5. The overall vehicle thermal management system of claim 4, wherein the warm air water circulation system comprises: the water heater comprises a warm air water pump, a water heater, a first three-way water valve and a warm air core body;
the output end of the warm air water pump is connected with the input end of the second runner of the first heat exchange element, the output end of the second runner of the first heat exchange element is connected with the input end of the water heater, the output end of the water heater is connected with the runner input end of the warm air core, the runner output end of the warm air core is connected with the first port of the first three-way water valve, the second port of the first three-way water valve is connected with the input end of the warm air water pump, and the third port of the first three-way water valve is connected with the input end of the warm air water pump through the first runner of the third heat exchange element.
6. The overall thermal management system of claim 5, wherein the warm air core is disposed on an air outlet trajectory of the blower.
7. The overall vehicle thermal management system of claim 6, wherein the battery water circulation system comprises: a battery water pump, a battery pack cooling element and a second three-way water valve;
the output end of the battery water pump is connected with the flow channel input end of the battery pack cooling element, the flow channel output end of the battery pack cooling element is connected with the input end of the second flow channel of the third heat exchange element, the output end of the second flow channel of the third heat exchange element is connected with the fourth port of the four-way valve through the second flow channel of the second heat exchange element, the third port of the four-way valve is connected with the first port of the second three-way water valve, the second port of the second three-way water valve is connected with the input end of the second flow channel of the third heat exchange element, and the third port of the second three-way water valve is connected with the input end of the battery water pump.
8. The overall vehicle thermal management system of claim 7, wherein the electric machine water circulation system comprises: the motor water pump, the motor cooling element, the third three-way water valve and the low-temperature radiator;
the output end of the motor water pump is connected with the first port of the third three-way water valve through the runner of the motor cooling element, the second port of the third three-way water valve is connected with the runner input end of the low-temperature radiator, and the runner output end of the low-temperature radiator is connected with the input end of the motor water pump;
and a third port of the third three-way water valve is connected with the first port of the four-way valve, and a second port of the four-way valve is connected with the input end of the motor water pump.
9. An electric vehicle, comprising: the whole vehicle thermal management system as claimed in any one of claims 1 to 8.
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| CN114475152B (en) * | 2022-01-25 | 2022-10-21 | 江西新电汽车空调系统有限公司 | Heat pump air conditioner and heat management system capable of being integrated and control method thereof |
| CN115782503A (en) * | 2022-03-07 | 2023-03-14 | 浙江凌昇动力科技有限公司 | Electric motor car thermal management system |
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