CN112810402A - Electric automobile thermal management system - Google Patents
Electric automobile thermal management system Download PDFInfo
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- CN112810402A CN112810402A CN202110228220.XA CN202110228220A CN112810402A CN 112810402 A CN112810402 A CN 112810402A CN 202110228220 A CN202110228220 A CN 202110228220A CN 112810402 A CN112810402 A CN 112810402A
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- way valve
- waterway
- cooling module
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- 238000001816 cooling Methods 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000009423 ventilation Methods 0.000 claims description 11
- 239000003507 refrigerant Substances 0.000 claims description 10
- 230000002528 anti-freeze Effects 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 230000020169 heat generation Effects 0.000 claims description 2
- 239000013526 supercooled liquid Substances 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00961—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising means for defrosting outside heat exchangers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
An electric vehicle thermal management system, comprising: front end cooling module, warm logical air conditioner, plate heat exchanger and the water route circulation of connecting in parallel with it, wherein: the first port of front end cooling module and the first port of plate heat exchanger link to each other with the second port and the third port of water route cross valve respectively, the second port of front end cooling module, be equipped with scroll compressor and vapour and liquid separator between the second port of warm logical air conditioner and the plate heat exchanger second port, the first port of warm logical air conditioner and the first port of front end cooling module link to each other with the first port of plate heat exchanger respectively, be equipped with hydrothermal PTC and power battery group between the fourth port of second port of plate heat exchanger and water route cross valve, be equipped with first electric water pump between the second port of front end cooling module and the first port of water route cross valve, DC converter and electric drive. When the motor is electrically controlled and the waste heat of the battery is insufficient, the water channel high-pressure PTC is opened to supplement heat, so that the heat emitted by the internal condenser meets the heating requirement of the passenger compartment.
Description
Technical Field
The invention relates to the technology in the field of automobile air conditioners, in particular to an electric automobile thermal management system without frosting risks.
Background
In order to meet the heat management requirements under all working conditions, the conventional electric automobile needs two high-voltage ceramic electric heaters (PTC), namely an air PTC arranged in a passenger compartment and a hydrothermal PTC arranged on an antifreezing solution side, but the high-voltage PTC is low in heating efficiency and energy efficiency ratio, and the endurance mileage of a battery is greatly reduced, so that the whole automobile performance of the electric automobile is influenced.
The heat pump system can effectively solve the problem of low PTC heating efficiency, but has the risk of frosting under certain working conditions, and once frosting happens, the performance of the heat pump is greatly influenced, and even the heat pump cannot work.
Disclosure of Invention
The invention provides a thermal management system of an electric automobile, aiming at the technical problem that the winter battery endurance mileage of the existing electric automobile is short, and the thermal management system can meet the refrigerating and heating requirements of a passenger cabin, electric control of a motor and a battery in a more comprehensive and efficient mode.
The invention is realized by the following technical scheme:
the invention comprises the following steps: front end cooling module, warm logical air conditioner, plate heat exchanger and the water route circulation of connecting in parallel with it, wherein: the first port of front end cooling module and the first port of plate heat exchanger link to each other with the second port and the third port of water route cross valve respectively, the second port of front end cooling module, be equipped with scroll compressor and vapour and liquid separator between the second port of warm logical air conditioner and the plate heat exchanger second port, the first port of warm logical air conditioner and the first port of front end cooling module link to each other with the first port of plate heat exchanger respectively, be equipped with hydrothermal PTC and power battery group between the fourth port of second port of plate heat exchanger and water route cross valve, be equipped with first electric water pump between the second port of front end cooling module and the first port of water route cross valve, direct current converter and Electric Drive Unit (EDU).
The front end cooling module comprises: external heat exchanger, low temperature water tank and cooling fan, wherein: the input end of the external heat exchanger and the output end of the low-temperature water tank are used as second ports of the front-end cooling module, and the input end of the low-temperature water tank and the output end of the external heat exchanger are used as first ports of the front-end cooling module.
The heating ventilating air conditioner comprises: an internal condenser, an evaporator, and a blower, wherein: the input end of the internal condenser and the output end of the evaporator are used as second ports of the heating ventilation air conditioner, and the input end of the evaporator and the output end of the internal condenser are used as first ports of the heating ventilation air conditioner.
The waterway circulation comprises: the three-time heating of the high-pressure hydrothermal PTC is realized through the switching of the waterway three-way valve and the four-way valve, namely, the heating mode is under the working conditions that the environmental temperature is lower than minus 10 ℃ and the heat productivity of the motor and the battery is small.
Technical effects
The invention recovers the heat of the electric control of the motor and the power battery as the heat input of the evaporator under the working condition of low temperature in winter, compared with the prior art, when the recovered heat is not enough to meet the heating requirement of the passenger compartment, the invention starts the high-pressure hydrothermal PTC as the supplement, has the characteristic of comprehensive functions, and at least reduces the cost of one high-pressure PTC while covering all modes in the electric automobile heat management such as refrigeration, heating and demisting of the passenger compartment, electric control heat dissipation of the motor, battery cooling and heating, and the like.
The invention can avoid the frosting risk through mode switching. Under the condition of higher ambient temperature (-10 ℃ to 10 ℃), the external heat exchanger is used as an evaporator to recover the heat of the environment; when the environmental temperature is lower than (-10 ℃), the plate heat exchanger is used as an evaporator to recover the waste heat of the electric control of the motor and the battery, and when the electric control of the motor and the waste heat of the battery are insufficient, the high-pressure PTC of the water channel is started to supplement heat so that the heat emitted by the internal condenser meets the heating requirement of the passenger compartment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1, a scroll compressor, 2, a gas-liquid separator, 3, an external heat exchanger, 4, a low-temperature water tank, 5, a cooling fan, 6, a first electronic expansion valve, 7, an internal condenser, 8, a second electronic expansion valve, 9, an evaporator, 10, 11, a third electronic expansion valve, 12, a plate heat exchanger, 13, a water channel four-way valve, 14, a power battery pack, 15, an electric driving device, 16, a direct-current converter, 17, a first electric water pump, 18, a hydrothermal PTC, 19, a first expansion water tank, 20, a first water channel three-way valve, 21, a second electric water pump, 22, a second expansion water tank, 23, a 24, a second electromagnetic valve, 25, a third electromagnetic valve, 26, a fourth electromagnetic valve, 27, 28, a second water;
FIG. 2 is a schematic diagram of a thermal management system of the present invention adapted for use in conditions where ambient temperature is less than-10 ℃;
FIG. 3 is a schematic diagram illustrating the effects of the embodiment.
Detailed Description
As shown in fig. 1, the present embodiment relates to a thermal management system, including: front end cooling module CRFM, the heating and ventilation air conditioner HVAC who connects in parallel with it, plate heat exchanger 12 and water route cross valve 13, wherein: the first port of the front-end cooling module CRFM and the first port of the plate heat exchanger 12 are respectively connected with the second port and the third port of the waterway four-way valve 13, a scroll compressor 1 and a gas-liquid separator 2 are arranged between the second port of the front-end cooling module CRFM, the second port of the heating, ventilation and air conditioning HVAC and the second port of the plate heat exchanger 12, the first port of the heating, ventilation and air conditioning HVAC and the first port of the front-end cooling module CRFM are respectively connected with the first port of the plate heat exchanger, a hydrothermal PTC18 and a power battery pack 14 are arranged between the second port of the plate heat exchanger 12 and the d end of the waterway four-way valve 13, and a first electric water pump 17, a direct current converter 16 and an electric driving device 15 are arranged between the second port of the front-end cooling module CRFM and the first port of the waterway four-way valve.
The front end cooling module CRFM includes: an external heat exchanger 3, a low-temperature water tank 4, and a cooling fan 5, wherein: the input end of the external heat exchanger 3 and the output end of the low-temperature water tank 4 are used as second ports of the front-end cooling module CRFM, and the input end of the low-temperature water tank 4 and the output end of the external heat exchanger 3 are used as first ports of the front-end cooling module CRFM.
The heating ventilation air conditioner HVAC includes: an internal condenser 7, an evaporator 9 and a blower 10, wherein: the input of the interior condenser 7 and the output of the evaporator 9 serve as a second port of the HVAC, and the input of the evaporator 9 and the output of the interior condenser 7 serve as a first port of the HVAC.
The front end of the evaporator 9 is provided with a second electronic expansion valve 8.
A first electronic expansion valve 6 and a fourth electromagnetic valve 26 which are connected in parallel are arranged between the first port of the front-end cooling module CRFM and the first port of the HVAC.
And a second electromagnetic valve 24 and a third electromagnetic valve 25 are respectively arranged between the output end of the scroll compressor 1 and the second port of the front-end cooling module CRFM and between the second ports of the heating, ventilating and air conditioning HVAC.
A second electric water pump 21 is arranged at a second port of the plate heat exchanger 12, a first waterway three-way valve 20 is arranged between the input end of the second electric water pump 21 and two ends of the hydrothermal PTC18, and a first expansion water tank 19 is arranged between the input end of the hydrothermal PTC 18.
And a third waterway three-way valve 29 is arranged at the output end between the input end of the hydrothermal PTC18 and the power battery pack 14, and a second port of the third waterway three-way valve 29 is connected with a fourth port of the waterway four-way valve 13.
A first electromagnetic valve 23 is arranged between the input end of the gas-liquid separator 2 and the second port of the front-end cooling module CRFM.
The embodiment relates to a heat exchange method of the electric automobile heat management system, which comprises the following steps: any one of the cooling, heating and demisting modes of the passenger compartment is respectively arranged and combined with a battery cooling mode or a heating mode and a motor electric control cooling and supplying functional mode to form more than ten heat exchange operation modes.
As shown in fig. 2, for the present embodiment, the heating mode of the thermal management system for an electric vehicle described above is suitable for the operating conditions where the ambient temperature is lower than-10 ℃ and the heat generation amount of the motor and the battery is small, in this mode, the heat in the passenger compartment is provided by the internal condenser 7, and the cold energy of the evaporator 12 is converted by the motor electronic control unit 15, the power battery pack 14 and the water-heat PTC18, specifically:
in the mode, the plate heat exchanger 12 is used as an evaporator, after being discharged from the compressor 1, high-temperature and high-pressure refrigerant gas enters the internal heat exchanger 7 through the third electromagnetic valve 25, releases heat to heat the passenger compartment, subcooled liquid at the outlet of the internal heat exchanger 7 passes through the one-way valve 27 and the third electronic expansion valve 11, is throttled and depressurized to obtain low-temperature and low-pressure two-phase refrigerant, absorbs the heat of the electric driving device 15, the power battery pack 14 and the hydrothermal PTC in the plate heat exchanger 12, evaporates into superheated gas, and finally returns to the compressor 1 through the gas-liquid separator 2 to complete the cycle.
The high-temperature antifreeze liquid becomes low-temperature liquid after passing through the plate heat exchanger 12, and enters the direct-current converter 16 and the electric driving device 15 to form an antifreeze liquid side after passing through the third port and the second port of the waterway four-way valve 13, the first port and the second port of the waterway three-way valve 28 and the first electronic water pump 17, and first temperature rise is obtained; then enters the power battery pack 14 through the first port and the fourth port of the waterway four-way valve 13 to obtain the second temperature rise; further through the first port and the third port of the third waterway three-way valve 29, the high-pressure hydrothermal PTC obtains a third temperature rise; and finally, the water returns to the plate heat exchanger 12 through the third port and the first port of the first waterway three-way valve 20 and the input end and the output end of the second electronic water pump 21 to form circulation.
When the heat productivity of the motor and the battery is large, the high-pressure hydrothermal PTC18 is not needed to provide heat, the first port and the second port of the antifreeze-side first waterway three-way valve 20 can be opened, the third port can be closed, the high-pressure hydrothermal PTC18 can be bypassed, and the refrigerant side is consistent with the mode of small heat productivity of the motor battery.
When the heat productivity of the motor is large enough, the heat of the high-pressure hydrothermal PTC and the battery is not needed, the first port and the second port of the first waterway three-way valve 20 at the antifreeze liquid side can be opened, the third port of the first waterway three-way valve 20 is closed, the second port and the third port of the third waterway three-way valve 29 are opened, the first port of the third waterway three-way valve is closed, the high-pressure hydrothermal PTC and the power battery pack can be bypassed, and the mode that the heat productivity of the refrigerant side is smaller than that of the battery motor is consistent.
Through system simulation, the ambient temperature is-10 ℃, 70% circulating air is generated, the rotating speed of a compressor is 6000rpm, and the average heating COP of the heat pump system is more than 2.2 under the working condition that the total heating capacity of a motor, a battery and hydrothermal PTC is 3 kW. The simulated 60min heating curve and high and low pressure changes are shown in FIG. 3.
In conclusion, the invention has high overall energy efficiency ratio and low power consumption. The energy efficiency ratio of the refrigeration mode reaches more than 3, the heating mode with the environment temperature of more than-10 ℃ adopts the form of an air source heat pump, the energy efficiency ratio can reach more than 2, the heating mode with the environment temperature of less than-10 ℃ adopts the form of a water source heat pump, one part of heat of the evaporator is from electric control of the motor and the waste heat of the battery, the other part of heat of the evaporator is from electric heating of the hydrothermal PTC, the energy efficiency ratio of the electric control of the motor and the waste heat of the battery can reach more than 2, and the heat energy efficiency ratio of the hydrothermal PTC is 1, so the energy efficiency ratio is more than 1 comprehensively. In general, the energy efficiency ratio of the system in various modes is high, and the total power consumption is small.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. An electric vehicle thermal management system, comprising: front end cooling module, warm logical air conditioner, plate heat exchanger and the water route circulation of connecting in parallel with it, wherein: a first port of the front-end cooling module and a first port of the plate type heat exchanger are respectively connected with a second port and a third port of the water channel four-way valve, a scroll compressor and a gas-liquid separator are arranged between the second port of the front-end cooling module, the second port of the heating and ventilation air conditioner and the second port of the plate type heat exchanger, the first port of the heating and ventilation air conditioner and the first port of the front-end cooling module are respectively connected with the first port of the plate type heat exchanger, a hydrothermal PTC and a power battery pack are arranged between the second port of the plate type heat exchanger and the fourth port of the water channel four-way valve, and a first electric water pump, a direct-current converter and an electric driving device are arranged between the second port of the front-end cooling module and the first port;
the front end cooling module comprises: external heat exchanger, low temperature water tank and cooling fan, wherein: the input end of the external heat exchanger and the output end of the low-temperature water tank are used as second ports of the front-end cooling module, and the input end of the low-temperature water tank and the output end of the external heat exchanger are used as first ports of the front-end cooling module;
the heating ventilating air conditioner comprises: an internal condenser, an evaporator, and a blower, wherein: the input end of the internal condenser and the output end of the evaporator are used as second ports of the heating ventilation air conditioner, and the input end of the evaporator and the output end of the internal condenser are used as first ports of the heating ventilation air conditioner;
the waterway circulation comprises: the three-time heating of the high-pressure hydrothermal PTC is realized through the switching of the waterway three-way valve and the four-way valve, namely, the heating mode is under the working conditions that the environmental temperature is lower than minus 10 ℃ and the heat productivity of the motor and the battery is small.
2. The thermal management system of an electric vehicle as claimed in claim 1, wherein a second electronic expansion valve is disposed at a front end of the evaporator.
3. The electric vehicle thermal management system of claim 1, wherein a first electronic expansion valve and a fourth solenoid valve which are connected in parallel are arranged between the first port of the front-end cooling module CRFM and the first port of the heating, ventilation and air conditioning HVAC.
4. The electric vehicle thermal management system of claim 1, wherein a second solenoid valve and a third solenoid valve are respectively arranged between the output end of the scroll compressor and the second port of the front-end cooling module CRFM and between the second port of the heating, ventilating and air conditioning HVAC.
5. The electric automobile heat management system of claim 1, wherein a second electric water pump is arranged at a second port of the plate heat exchanger, a first waterway three-way valve is arranged between an input end of the second electric water pump and two ends of the hydrothermal PTC, and a first expansion water tank is arranged between the input end of the hydrothermal PTC and the output end of the hydrothermal PTC.
6. The thermal management system of the electric automobile according to claim 1, wherein a third waterway three-way valve is arranged at an output end between an input end of the hydrothermal PTC and the power battery pack, and a second port of the third waterway three-way valve is connected with a fourth port of the waterway four-way valve.
7. The thermal management system of the electric automobile according to claim 1, wherein a first solenoid valve is arranged between the input end of the gas-liquid separator and the second port of the front-end cooling module CRFM.
8. A heat exchange method based on the electric automobile heat management system as claimed in any one of claims 1-7 is characterized by comprising the following steps: any one of the cooling, heating and demisting modes of the passenger compartment or the combination of the cooling, heating and demisting modes of the passenger compartment with the battery cooling mode or the heating mode and the electric control cooling function mode of the motor is arranged and combined.
9. The heat exchange method according to claim 8, wherein in the heating mode, the heat of the passenger compartment is provided by the internal condenser, and the cold of the evaporator is converted by the electric control of the motor, the power battery pack and the water-heat PTC together, specifically:
the third electromagnetic valve is opened, the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are closed, the third electronic expansion valve is opened, the first electronic expansion valve and the second electronic expansion valve are closed to form a refrigerant side, the plate heat exchanger is used as an evaporator in the mode, high-temperature and high-pressure refrigerant gas enters the internal heat exchanger through the third electromagnetic valve after being discharged from the compressor, heat is released to heat a passenger compartment, supercooled liquid at the outlet of the internal heat exchanger passes through the one-way valve and the third electronic expansion valve, is throttled and depressurized to obtain low-temperature and low-pressure two-phase refrigerant, the low-temperature and low-pressure two-phase refrigerant absorbs heat of the electric driving device, the power battery pack and the hydrothermal PTC in the plate heat exchanger and is evaporated into;
the high-temperature antifreeze liquid becomes low-temperature liquid after passing through the plate heat exchanger, enters the direct-current converter and the electric driving device after passing through the third port and the second port of the waterway four-way valve, the first port and the second port of the waterway three-way valve and the first electronic water pump to form an antifreeze liquid side and obtain first temperature rise; then enters a power battery pack through a first port and a fourth port of the waterway four-way valve to obtain second temperature rise; further passing through a first port and a third port of a third waterway three-way valve, and obtaining third temperature rise by the high-pressure hydrothermal PTC; and finally, the water returns to the plate heat exchanger through a third port and a first port of the first waterway three-way valve and an input end and an output end of the second electronic water pump to form circulation.
10. The heat exchange method according to claim 9, wherein the high-pressure hydrothermal PTC can be bypassed by opening the first port and the second port of the antifreeze-side first waterway three-way valve and closing the third port, and the refrigerant side is consistent with the mode of low heat generation of the motor battery;
and opening the first port and the second port of the first waterway three-way valve at the antifreeze liquid side, closing the third port, opening the second port and the third port of the third waterway three-way valve, and closing the first port, so that the high-pressure hydrothermal PTC and the power battery pack can be bypassed, and the refrigerant side is consistent with the mode that the heat productivity of the battery motor is small.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110228220.XA CN112810402A (en) | 2021-03-02 | 2021-03-02 | Electric automobile thermal management system |
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| CN202110228220.XA CN112810402A (en) | 2021-03-02 | 2021-03-02 | Electric automobile thermal management system |
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| CN113942366A (en) * | 2021-11-17 | 2022-01-18 | 东风汽车集团股份有限公司 | Cold-hot circulating system of front-and-back double-motor electric automobile and control method |
| CN114132169A (en) * | 2021-11-30 | 2022-03-04 | 三一汽车制造有限公司 | Work vehicle and thermal management system thereof |
| WO2022222102A1 (en) * | 2021-04-22 | 2022-10-27 | 浙江智马达智能科技有限公司 | Thermal management system, heating method and device, vehicle, and storage medium |
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| CN113942366A (en) * | 2021-11-17 | 2022-01-18 | 东风汽车集团股份有限公司 | Cold-hot circulating system of front-and-back double-motor electric automobile and control method |
| CN113942366B (en) * | 2021-11-17 | 2023-01-06 | 东风汽车集团股份有限公司 | Cold-hot circulating system of front-and-back double-motor electric automobile and control method |
| CN114132169A (en) * | 2021-11-30 | 2022-03-04 | 三一汽车制造有限公司 | Work vehicle and thermal management system thereof |
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