CN113635731A - High-efficient thermal management system of pure electric vehicles - Google Patents
High-efficient thermal management system of pure electric vehicles Download PDFInfo
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- CN113635731A CN113635731A CN202110943528.2A CN202110943528A CN113635731A CN 113635731 A CN113635731 A CN 113635731A CN 202110943528 A CN202110943528 A CN 202110943528A CN 113635731 A CN113635731 A CN 113635731A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 230000017525 heat dissipation Effects 0.000 claims description 32
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 2
- 229910001416 lithium ion Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 239000000110 cooling liquid Substances 0.000 description 22
- 239000002826 coolant Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- B60H1/00271—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
- B60H1/00357—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
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
- B60H1/2221—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters arrangements of electric heaters for heating an intermediate liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—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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- 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
- B60L58/27—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 heating
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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
-
- 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 relates to a high-efficiency thermal management system of a pure electric vehicle, which comprises the following components: the motor heat exchange loop, the battery heat exchange loop and the PTC heating loop realize simultaneous or independent heating through the controllable opening of the electronic three-way valve and a heating request with variable flow, realize the water replenishing and air exchange functions of a motor heat exchange system and the heat exchange of a battery system, adopt a radiator cooling mode, save the energy consumption of the whole vehicle in a low-temperature environment and improve the endurance mileage; the aim of increasing the discharge capacity of the battery by heating the battery is achieved by recycling the heat of the motor, the energy consumption of PTC heating can be saved on the premise of avoiding energy consumption waste, the energy consumption of the whole vehicle is reduced, and diversified requirements of users are met.
Description
Technical Field
The invention relates to a pure electric vehicle, in particular to a high-efficiency thermal management system of the pure electric vehicle.
Background
The endurance mileage of the pure electric vehicle is a performance most concerned by users, the high-temperature endurance mileage and the low-temperature endurance mileage of the pure electric vehicle become pain points to be solved urgently in the industry, and the energy consumption of a thermal management system of the pure electric vehicle is closely related to the endurance mileage of the pure electric vehicle. At present, a heat management scheme for improving high-temperature endurance in the industry is mainly to optimize an air conditioning strategy and reduce battery cooling energy consumption. The heat management scheme for improving the low-temperature endurance is a heat pump air conditioner, the discharge performance of a low-temperature battery and the like. The domestic heat pump air conditioning technology is also applied to part of vehicle types, but the technology is still immature due to more complex systems. The method for improving the low-temperature discharge performance of the battery mainly comprises the step of heating the battery, such as battery preheating, a PTC (positive temperature coefficient) driving heating technology, a battery self-heating technology, a motor waste heat recovery heating technology and the like. The battery preheating, PTC traveling heating and battery self-heating technologies can use electricity of a charging pile, and the function can be used only when charging is carried out; the last two are mainly to consume the electric quantity of battery self and be used for heating, have reduced the electric quantity that the vehicle was used for the drive, have reduced the actual continuation of the journey mileage of vehicle.
Patent CN 202011272868.9 an electric automobile thermal management system is the thermal management system who has motor waste heat recovery technique, and the valve that this system used is more, realizes the application of system function through the control of different valves, and wherein motor waste heat recovery scheme utilizes three-way valve to communicate motor cooling and battery cooling to guarantee the use of motor waste heat function, and the structure is very complicated, the control degree of difficulty is big, high in production cost.
Disclosure of Invention
The invention relates to a pure electric vehicle high-efficiency heat management system aiming at the problems in the prior art, and the pure electric vehicle high-efficiency heat management system is creatively designed, a motor heat exchange loop, a battery heat exchange loop and a PTC heating loop are designed, the simultaneous or independent heating and the flow-variable heating request are realized through the controllable opening degree of an electronic three-way valve, the water supplementing and air exchanging functions of the motor heat exchange system and the heat exchange of a battery system are realized, and the diversified requirements of users are met. The technical scheme adopted for realizing the invention is as follows:
a pure electric vehicle efficient thermal management system, comprising: motor heat transfer circuit, battery heat transfer circuit and PTC heating circuit, motor heat transfer circuit includes: the radiator 3, the first electronic three-way valve 4, the motor 5, the DCDC6, the first electronic water pump 7 and the four-way valve 8 are sequentially connected to form a loop, the first expansion water tank 1 is communicated with the first electronic three-way valve 4 and the radiator 3 through a pipeline, and the first electronic three-way valve 4 is also communicated with the four-way valve 8 and the radiator 3 through a pipeline;
the battery heat exchange loop includes: the four-way valve 8, the first intermediate heat exchanger 9, the second intermediate heat exchanger 10, the power battery 11 and the second electronic water pump 12 are sequentially communicated to form a loop, a heat dissipation pipeline is arranged on the power battery 11, the second expansion water tank 2 is communicated with a pipeline between the first intermediate heat exchanger 9 and the second intermediate heat exchanger 10, and the second expansion water tank 2 is also communicated with a pipeline between the heat dissipation pipeline of the power battery 11 and the second electronic water pump 12;
the PTC heating circuit includes: the second intermediate heat exchanger 10, the second electronic three-way valve 14, the PTC15 and the third electronic water pump 16 are sequentially connected to form a loop, and the warm air core 13 is communicated with the second electronic three-way valve 14 through a pipeline and is communicated with a pipeline between the second intermediate heat exchanger 10 and the third electronic water pump 16; the first expansion water tank 1 is communicated with a pipeline between the second intermediate heat exchanger 10 and the third electronic water pump 16, and the first expansion water tank 1 is also communicated with a pipeline between the third electronic water pump 16 and the PTC 15.
Furthermore, heat dissipation pipelines are respectively arranged on the motor 5 and the DCDC6, the inlet e1 of the first electronic three-way valve 4 is communicated with the outlet of the heat dissipation pipeline of the motor 5, the heat dissipation pipeline inlet of the motor 5 is communicated with the heat dissipation pipeline outlet of the DCDC6, the heat dissipation pipeline inlet of the DCDC6 is communicated with the outlet of the first electronic water pump 7, the inlet of the first electronic water pump 7 is communicated with a port of a four-way valve 8b2, a port of a four-way valve 8a1 is communicated with the outlet of the radiator 3, the inlet of the radiator 3 is communicated with the outlet g3 of the first electronic three-way valve 4, the outlet f2 of the first electronic three-way valve 4 is communicated with a pipeline between the port 1 of the four-way valve 8a and the outlet of the radiator 3, the first expansion water tank 1 is communicated with a pipeline between a port of the four-way valve 8b2 and an inlet of the first electronic water pump 7, the first expansion tank 1 communicates with a pipe between the outlet g3 of the first electronic three-way valve 4 and the inlet of the radiator 3.
Further, the battery exchanges heat: the heat dissipation device is characterized in that a heat dissipation pipeline is arranged on the power battery 11, the heat dissipation pipeline outlet of the power battery 11 is communicated with the inlet of a second electronic water pump 12, the outlet of the second electronic water pump 12 is communicated with the 8c3 port of a four-way valve, the 8d4 port of the four-way valve is communicated with the first inlet of a first middle heat exchanger 9, the first outlet of the first middle heat exchanger 9 is communicated with the first inlet of a second middle heat exchanger 10, the first outlet of the second middle heat exchanger 10 is communicated with the heat dissipation pipeline inlet of the power battery 11, the second expansion water tank 2 is communicated with the first outlet of the first middle heat exchanger 9 and the first inlet of the second middle heat exchanger 10, and the second expansion water tank 2 is communicated with the heat dissipation pipeline outlet of the power battery 11 and the inlet of the second electronic water pump 12.
Further, the PTC heating circuit: the outlet of the third electronic water pump 16 is communicated with the inlet of a PTC15, the outlet of the PTC15 is communicated with the inlet j1 of the second electronic three-way valve 14, the outlet k2 of the second electronic three-way valve 14 is communicated with the second inlet of the second intermediate heat exchanger 10, the second outlet of the second intermediate heat exchanger 10 is communicated with the inlet of the third electronic water pump 16, the outlet h3 of the second electronic three-way valve 14 is communicated with the inlet of the warm air core 13, the outlet of the warm air core 13 is communicated with the second outlet of the second intermediate heat exchanger 10 and the inlet of the third electronic water pump 16 through a pipeline, the first expansion water tank 1 is communicated with the second outlet of the second intermediate heat exchanger 10 and the inlet of the third electronic water pump 16 through a pipeline, and the outlets of the first expansion water tank 1 and the third electronic water pump 16 are communicated with the inlet of the PTC15 through a pipeline.
Further, the motor 5 is a variable frequency speed motor.
Further, the four-way valve 8 is a solenoid valve.
Further, the heat sink 3 is an aluminum alloy heat sink.
8. The efficient thermal management system for the pure electric vehicle as recited in claim 1, wherein the material of the pipeline is rubber.
Further, the power battery 11 is a lithium ion rechargeable battery.
The beneficial effects of the pure electric vehicle high-efficiency heat management system are as follows:
1. in the efficient thermal management system of the pure electric vehicle, a motor cooling mode is adopted to realize the stepped cooling of an electronic water pump, so that the energy consumption of the whole vehicle is reduced;
2. a battery heat exchange loop of a pure electric vehicle high-efficiency heat management system adopts a radiator cooling mode, so that the energy consumption of the whole vehicle in a low-temperature environment can be saved, and the endurance mileage is improved; meanwhile, the aim of heating the battery to improve the discharge capacity of the battery is achieved by repeatedly utilizing the heat of the motor, and the energy consumption of PTC heating can be saved on the premise of avoiding energy consumption waste;
3. in the pure electric vehicle high-efficiency thermal management system, the PTC heating mode adopted in the passenger compartment heating mode has the advantages of simple structure, safe system, faster temperature rise of the passenger compartment and better use experience for passengers;
4. the utility model provides a pure electric vehicles high efficiency heat management system, has increased battery charging heating and passenger cabin heating composite mode, through adopting electron three-way valve, can realize warm braw core and middle heat exchanger's independence or composite mode simultaneously, has satisfied user's pluralism demand.
Drawings
FIG. 1 is a schematic diagram of a high-efficiency thermal management system of a pure electric vehicle;
FIG. 2 is a schematic diagram of a heat exchange circuit of the motor;
FIG. 3 is a schematic diagram of a battery heat exchange circuit;
FIG. 4 is a schematic view of a PTC heating circuit;
FIG. 5 is part 4, mode 1 of FIG. 1;
FIG. 6 is pattern 2 of item 4 of FIG. 1;
FIG. 7 is part 8, mode 1 of FIG. 1;
FIG. 8 is pattern 2 of item 8 of FIG. 1;
FIG. 9 is part 14, mode 1 of FIG. 1;
FIG. 10 is pattern 2 of the member 14 of FIG. 1;
FIG. 11 is pattern 3 of item 14 of FIG. 1;
in the figure: 1. the system comprises a first expansion water tank, a second expansion water tank, a radiator, a first electronic three-way valve, a motor, a first electronic water pump, a four-way valve, a first intermediate heat exchanger, a second intermediate heat exchanger, a power battery, a second electronic water pump, a warm air core body, a second electronic three-way valve, a radiator, a second electronic three-way valve, a motor, a DCDC, a first electronic water pump, a fourth electronic water heater.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, which are described herein for illustrative purposes only and are not intended to limit the present invention.
As shown in figure 1: a pure electric vehicles high efficiency thermal management system, it includes: the heat exchanger comprises a motor heat exchange loop, a battery heat exchange loop and a PTC heating loop.
As shown in fig. 2: the motor heat exchange loop comprises: the electronic water heater comprises a first expansion water tank 1, a radiator 3, a first electronic three-way valve 4, a motor 5, a DCDC6, a first electronic water pump 7 and a four-way valve 8, wherein a heat dissipation pipeline is arranged on the motor 5, a heat dissipation pipeline is arranged on the DCDC6, an inlet e1 of the first electronic three-way valve 4 is communicated with an outlet of the heat dissipation pipeline of the motor 5, an inlet of the heat dissipation pipeline of the motor 5 is communicated with an outlet of the DCDC6, an inlet of the heat dissipation pipeline of the DCDC6 is communicated with an outlet of the first electronic water pump 7, an inlet of the first electronic water pump 7 is communicated with an outlet of the four-way valve 8b2, an outlet of the four-way valve 8a1 is communicated with an outlet of the radiator 3, an inlet of the radiator 3 is communicated with an outlet g3 of the first electronic three-way valve 4, an outlet f2 of the first electronic three-way valve 4 is communicated with a pipeline between an outlet of the four-way valve 8a1 and an outlet of the radiator 3, the first expansion water tank 1 is communicated with a pipeline between an inlet of the four-way valve 8b2 and the first electronic water pump 7, the first expansion tank 1 is communicated with a pipeline between an outlet g3 of the first electronic three-way valve 4 and an inlet of the radiator 3. The middle parts of the components are communicated by using water pipes, and cooling liquid is used as a flowing heat transfer medium in the pipelines to realize heat exchange of the motor system; meanwhile, the radiator 3 and the electronic three-way valve 4 are connected with a pipeline, and a connecting pipeline between the electronic water pump 7 and the four-way valve 8 is connected with the expansion water tank 1 through a pipeline, so that the water supplementing and air exchanging functions of the motor heat exchange system are realized. Through the operation of the electronic water pump 7, the heat of the DCDC6 and the motor 5 is transferred to the cooling liquid in the pipeline, the cooling liquid passes through the radiator 3, and the radiator 3 exchanges heat with the external air, so that the working temperature of the motor system is reduced.
As shown in fig. 3: the battery heat exchange loop comprises: a second expansion water tank 2, a four-way valve 8, a first intermediate heat exchanger 9, a second intermediate heat exchanger 10, a power battery 11, a second electronic water pump 12, a heat dissipation pipeline is arranged on the power battery 11, the outlet of the heat dissipation pipeline of the power battery 11 is communicated with the inlet of the second electronic water pump 12, the outlet of the second electronic water pump 12 is communicated with a port 8c3 of a four-way valve, a port 8d4 of the four-way valve is communicated with a first inlet of the first intermediate heat exchanger 9, the first outlet of the first intermediate heat exchanger 9 is communicated with the first inlet of the second intermediate heat exchanger 10, a first outlet of the second intermediate heat exchanger 10 is communicated with an inlet of a heat dissipation pipeline of the power battery 11, the second expansion water tank 2 is communicated with a first outlet of the first intermediate heat exchanger 9 and a first inlet of the second intermediate heat exchanger 10 through pipelines, and the second expansion water tank 2 is communicated with a pipeline between the outlet of a heat dissipation pipeline of the power battery 11 and the inlet of the second electronic water pump 12. The other side of the intermediate heat exchanger 9 is communicated with an air conditioning system, a low-temperature refrigerant exchanges heat with high-temperature cooling liquid in a battery heat exchange loop in the intermediate heat exchanger 9, and the cooling liquid with the reduced temperature cools the power battery 11. The intermediate heat exchanger 10 is communicated with the PTC heating loop, high-temperature cooling liquid in the PTC heating loop exchanges heat with low-temperature cooling liquid in the battery heat exchange loop in the intermediate heat exchanger 10, the heated cooling liquid heats the power battery 11, the discharge capacity of the heated power battery 11 is increased, and the endurance mileage of the vehicle is increased.
As shown in fig. 4: the PTC heating circuit comprises: a first expansion water tank 1, a second intermediate heat exchanger 10, a warm air core 13, a second electronic three-way valve 14, a PTC15 and a third electronic water pump 16, the outlet of the third electronic water pump 16 is communicated with the inlet of the PTC15, the outlet of the PTC15 is communicated with the inlet j1 of the second electronic three-way valve 14, the outlet k2 of the second electronic three-way valve 14 is communicated with the second inlet of the second intermediate heat exchanger 10, a second outlet of the second intermediate heat exchanger 10 is communicated with an inlet of a third electronic water pump 16, an outlet h3 of a second electronic three-way valve 14 is communicated with an inlet of a warm air core 13, the outlet of the warm air core body 13 is communicated with the second outlet of the second intermediate heat exchanger 10 and the inlet of the third electronic water pump 16 through a pipeline, the first expansion water tank 1 is communicated with a second outlet of the second intermediate heat exchanger 10 and an inlet of a third electronic water pump 16 through pipelines, the first expansion water tank 1 is communicated with the outlet of the third electronic water pump 16 through a pipeline between the inlet of the PTC 15. In the heating of the interior of the passenger compartment and the low-temperature quick charging requirement of the battery in the autumn and winter environment, the PTC15 is adopted to heat the cooling liquid in the system, and the heated cooling liquid is used for heating the warm air or the battery in the passenger compartment through the warm air core or the intermediate heat exchanger 10.
1. A motor cooling mode:
this mode is enabled when the motor controller and DCDC temperatures are high. When the temperature of the calibrated motor controller is not less than 40 ℃ and the temperature signal of the calibrated DCDC is not less than 35 ℃, at the moment, the electronic three-way valve 4 is in a mode 1 as shown in figure 5, the four-way valve is in a mode 1 as shown in figure 7, the electronic water pump 7 operates to drive the cooling liquid in the system to flow, and the cooling liquid is heated by the motor controller and the DCDC and then is transmitted to the outside air through the radiator. For further energy saving, the rotating speed gear of the electronic water pump 7 can be divided into three gears according to the temperature of the motor controller, the higher the gear is, the higher the rotating speed of the electronic water pump is, and the better the cooling effect is. When the internal temperature of the motor controller is less than 40 ℃, the electronic water pump 7 does not work; when the temperature of the calibrated motor controller is more than or equal to 40 ℃, the rotating speed of the electronic water pump 7 is set to be 1 gear; when the temperature of the calibrated motor controller is more than or equal to 60 ℃, the rotating speed of the electronic water pump 7 is set to be 2 gears; when the temperature of the calibrated motor controller is more than or equal to 75 ℃, the rotating speed of the electronic water pump 7 is set to be 3 gears.
2. Low temperature battery cooling mode:
the external environment temperature is low, and the battery is started when the temperature is high. Calibrating the external temperature to be less than or equal to 20 ℃, simultaneously calibrating the maximum temperature of the battery to be more than or equal to 38 ℃, switching the electronic three-way valve 4 to be the mode 2 as shown in the attached drawing 6, switching the four-way valve 8 to be the mode 2 as shown in the attached drawing 8, then starting the operation of the electronic water pump 7 and the electronic water pump 12, adjusting the motor heat exchange loop and the battery heat exchange loop to be the communication mode from the independent mode at the moment, dissipating heat of the high temperature of the battery system through a radiator of the motor system, and then transferring the heat in the system to the external air through the radiator. Compared with the conventional air conditioner cooling battery mode, the mode is more energy-saving; the power consumption of the compressor of the conventional air-conditioning cooling mode is 10-20 times higher than that of two low-power electronic water pumps of the low-temperature battery cooling mode.
3. High-temperature battery cooling mode:
and when the calibrated external temperature is higher than 20 ℃ and the maximum temperature of the calibrated battery is higher than or equal to 38 ℃, starting a high-temperature battery cooling mode. The four-way valve 8 is in mode 1, and as shown in fig. 7, the electronic water pump 12 operates to drive the heated coolant to flow through the intermediate heat exchanger 9. The other side of the intermediate heat exchanger is provided with flowing low-temperature air-conditioning refrigerant, the low-temperature refrigerant exchanges heat with high-temperature cooling liquid of the battery heat exchange side, the high-temperature cooling liquid becomes low-temperature cooling liquid, and the low-temperature cooling liquid passes through the intermediate heat exchanger 10 and reaches the battery to cool the battery.
4. Battery running heating mode:
when the temperature of the coolant of the calibrated motor loop is higher than 20 ℃ and the temperature of the calibrated battery is lower than 15 ℃, the electronic three-way valve 4 is switched to the mode 2, as shown in the attached drawing 6, the control four-way valve is adjusted to the mode 2, as shown in the attached drawing 8, the electronic water pump 7 and the electronic water pump 12 start to operate, at the moment, the motor heat exchange loop and the battery heat exchange loop are communicated, and the water pump drives the coolant to flow in the two loops. The battery charging mode is to transfer the residual heat of the motor to the battery by taking cooling liquid as an intermediate medium, increase the discharge capacity of the battery after the temperature of the battery rises, and improve the low-temperature endurance mileage.
5. Battery charging heating mode:
the charging device is used when the battery is charged at low temperature, and when the temperature of the calibrated battery 11 is lower than 15 ℃ when a vehicle charging gun starts to work, a charging heating mode is started to ensure quick full charge. At this time, the four-way valve 8 is in the mode 1, as shown in fig. 7, the electronic three-way valve 14 is switched to the mode 1, as shown in fig. 9, the electronic water pump 12 and the electronic water pump 16 start to operate, the PTC15 starts to generate heat and heat the cooling liquid of the PTC loop by using the high voltage of the charging pile, the heated cooling liquid exchanges heat with the low-temperature cooling liquid in the battery heat exchange loop in the intermediate heat exchanger 10, and the cooling liquid of the battery heat exchange loop is continuously heated to heat the battery; when the temperature of the battery 11 reaches 15 ℃, the PTC heating is stopped, the electronic water pump 12 and the electronic water pump 15 stop running, the four-way valve 8 is adjusted to be in the mode 2, and the battery is started to be charged.
6. Heating mode of passenger compartment:
when the passenger compartment has a heating demand, the passenger compartment heating mode is started. At this time, the electronic three-way valve 14 is switched to the mode 2, as shown in fig. 10, the electronic water pump 16 starts to operate, the PTC15 starts to generate heat by the high voltage of the battery and heats the coolant in the PTC circuit, the heated coolant enters the warm air core 13 through the three-way valve, and exchanges heat with the cold air passing through the outside of the warm air core 13, and the cold air is changed into hot air and enters the passenger compartment.
7. The combined mode of battery charging heating and passenger cabin heating is as follows:
this mode is turned on when the vehicle is charging and the battery temperature is below 15 deg.c, and the passenger compartment has a need for heating. At this time, the three-way valve 14 is switched to the mode 3, as shown in fig. 11, the electronic water pump 12 and the electronic water pump 16 start to operate, and the PTC15 starts to generate heat by the high voltage of the charging pile and heat the coolant in the PTC circuit. The heated coolant is divided into two paths by a three-way valve 14, one path enters a warm air core 13, and the other path is close to the hot intermediate heat exchanger 10. The cooling liquid passing through the warm air core body 13 exchanges heat with cold air passing through the outside of the warm air core body 13, and the cold air is changed into hot air to enter the passenger compartment; the coolant passing through the intermediate heat exchanger 10 also exchanges heat with the low-temperature cooling in the battery heat exchange circuit inside the intermediate heat exchanger 10, and the coolant in the battery heat exchange circuit is continuously heated to heat the battery 11. When the temperature of the battery 11 reaches 15 ℃, the three-way valve 14 is adjusted to the mode 2, and the electronic water pump 12 stops running, and the passenger compartment heating mode is performed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (9)
1. A pure electric vehicle efficient thermal management system, comprising: a motor heat exchange loop, a battery heat exchange loop and a PTC heating loop, which are characterized in that,
the motor heat exchange loop includes: the radiator (3), the first electronic three-way valve (4), the motor (5), the DCDC (6), the first electronic water pump (7) and the four-way valve (8) are sequentially connected to form a loop, the first expansion water tank (1) is communicated with the first electronic three-way valve (4) and the radiator (3) through a pipeline, and the first electronic three-way valve (4) is also communicated with the four-way valve (8) and the radiator (3) through a pipeline;
the battery heat exchange loop includes: a four-way valve (8), a first intermediate heat exchanger (9), a second intermediate heat exchanger (10), a power battery (11) and a second electronic water pump (12) are sequentially communicated to form a loop, a heat dissipation pipeline is arranged on the power battery (11), a second expansion water tank (2) is communicated with a pipeline between the first intermediate heat exchanger (9) and the second intermediate heat exchanger (10), and the second expansion water tank (2) is also communicated with a pipeline between the heat dissipation pipeline of the power battery (11) and the second electronic water pump (12);
the PTC heating circuit includes: the second intermediate heat exchanger (10), the second electronic three-way valve (14), the PTC (positive temperature coefficient) device (15) and the third electronic water pump (16) are sequentially connected to form a loop, and the warm air core body (13) is communicated with a pipeline of the second electronic three-way valve (14) and a pipeline between the second intermediate heat exchanger (10) and the third electronic water pump (16); the first expansion water tank 1 is communicated with a pipeline between the second intermediate heat exchanger 10 and the third electronic water pump 16, and the first expansion water tank 1 is also communicated with a pipeline between the third electronic water pump 16 and the PTC 15.
2. The efficient thermal management system for the pure electric vehicle of claim 1, wherein the heat exchange loop of the motor is as follows: the motor (5) and the DCDC (6) are respectively provided with a heat dissipation pipeline, an inlet e1 of the first electronic three-way valve (4) is communicated with a heat dissipation pipeline outlet of the motor (5), a heat dissipation pipeline inlet of the motor (5) is communicated with a heat dissipation pipeline outlet of the DCDC (6), a heat dissipation pipeline inlet of the DCDC (6) is communicated with an outlet of the first electronic water pump (7), an inlet of the first electronic water pump (7) is communicated with a port b2 of the four-way valve (8), a port a1 of the four-way valve (8) is communicated with an outlet of the radiator (3), an inlet of the radiator (3) is communicated with an outlet g3 of the first electronic three-way valve (4), an outlet f2 of the first electronic three-way valve (4) is communicated with a pipeline between a port 1 of the four-way valve (8) and the outlet of the radiator (3), and the first expansion water tank (1) is communicated with a pipeline between a port b2 of the four-way valve (8) and the inlet of the first electronic water pump (7), the first expansion water tank (1) is communicated with a pipeline between an outlet g3 of the first electronic three-way valve (4) and an inlet of the radiator (3).
3. The efficient thermal management system for the pure electric vehicle of claim 1, wherein the battery exchanges heat: a heat dissipation pipeline is arranged on the power battery (11), the outlet of the heat dissipation pipeline of the power battery (11) is communicated with the inlet of the second electronic water pump (12), the outlet of the second electronic water pump (12) is communicated with a port c3 of a four-way valve (8), a port d4 of the four-way valve (8) is communicated with the first inlet of the first intermediate heat exchanger (9), a first outlet of the first intermediate heat exchanger (9) is communicated with a first inlet of the second intermediate heat exchanger (10), a first outlet of the second intermediate heat exchanger (10) is communicated with an inlet of a heat dissipation pipeline of the power battery (11), the second expansion water tank (2) is communicated with a first outlet of the first intermediate heat exchanger (9) and a first inlet of the second intermediate heat exchanger (10) through pipelines, and the second expansion water tank (2) is communicated with a pipeline between the outlet of a heat dissipation pipeline of the power battery (11) and the inlet of the second electronic water pump (12).
4. The efficient thermal management system for the pure electric vehicle as claimed in claim 1, wherein the PTC heating circuit: the outlet of the third electronic water pump (16) is communicated with the inlet of the PTC (15), the outlet of the PTC (15) is communicated with the inlet j1 of the second electronic three-way valve (14), the outlet k2 of the second electronic three-way valve (14) is communicated with the second inlet of the second intermediate heat exchanger (10), a second outlet of the second intermediate heat exchanger (10) is communicated with an inlet of a third electronic water pump (16), the outlet h3 of the second electronic three-way valve (14) is communicated with the inlet of the warm air core body (13), the outlet of the warm air core body (13) is communicated with the second outlet of the second intermediate heat exchanger (10) and the inlet of the third electronic water pump (16) through a pipeline, the first expansion water tank (1) is communicated with a second outlet of the second intermediate heat exchanger (10) and an inlet of the third electronic water pump (16) through a pipeline, and the outlets of the first expansion water tank (1) and the third electronic water pump (16) are communicated with the inlet of the PTC (15) through a pipeline.
5. The efficient thermal management system for the pure electric vehicle as recited in claim 1, wherein the motor (5) is a variable frequency variable speed motor.
6. The efficient thermal management system for the pure electric vehicle as recited in claim 1, wherein the four-way valve (8) is a solenoid valve.
7. The efficient thermal management system for the pure electric vehicle as recited in claim 1, wherein the heat sink (3) is an aluminum alloy heat sink.
8. The efficient thermal management system for the pure electric vehicle as recited in claim 1, wherein the material of the pipeline is rubber.
9. The efficient thermal management system for the pure electric vehicle as recited in claim 1, wherein the power battery (11) is a lithium-ion rechargeable battery.
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