CN116278626A - Hybrid electric vehicle thermal management system - Google Patents

Hybrid electric vehicle thermal management system Download PDF

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Publication number
CN116278626A
CN116278626A CN202310468788.8A CN202310468788A CN116278626A CN 116278626 A CN116278626 A CN 116278626A CN 202310468788 A CN202310468788 A CN 202310468788A CN 116278626 A CN116278626 A CN 116278626A
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CN
China
Prior art keywords
water
interface
communicated
way valve
battery
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Pending
Application number
CN202310468788.8A
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Chinese (zh)
Inventor
刘建祥
陈博
杜魏魏
赵狐龙
陈帆
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Application filed by Anhui Jianghuai Automobile Group Corp filed Critical Anhui Jianghuai Automobile Group Corp
Priority to CN202310468788.8A priority Critical patent/CN116278626A/en
Publication of CN116278626A publication Critical patent/CN116278626A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • B60H1/004—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
    • 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
    • B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
    • 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
    • B60H1/025—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from both the cooling liquid and the exhaust gases of the propulsion plant
    • 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
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • 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
    • 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
    • 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 provides a hybrid electric vehicle thermal management system, which comprises a battery circulation waterway, a motor electric control circulation waterway, a passenger cabin heating circulation waterway and a passenger cabin refrigerating circulation loop, wherein the motor electric control circulation waterway and the battery circulation waterway share a first four-way valve, and the motor electric control circulation waterway and the battery circulation waterway can be communicated or disconnected by switching the working mode of the first four-way valve; the passenger cabin heating circulating water channel and the passenger cabin refrigerating circulating loop share the combined battery cooler with the battery circulating water channel respectively, and whether cooling water of the passenger cabin heating circulating water channel flows through the combined battery cooler can be controlled by switching the working mode of the second four-way valve on the passenger cabin heating circulating water channel; whether the refrigerant of the passenger cabin refrigeration cycle loop flows through the combined battery cooler can be controlled by switching the working state of the electronic expansion valve on the passenger cabin refrigeration cycle loop. The invention can realize the recycling of the motor electric control element and the engine waste heat, so that the whole vehicle is more energy-saving.

Description

Hybrid electric vehicle thermal management system
Technical Field
The invention belongs to the technical field of vehicle thermal management, and particularly relates to a hybrid electric vehicle thermal management system.
Background
In order to improve the energy utilization efficiency, the energy utilization system is changed, and the electric, new energy and clean traffic are realized, so that the method is a trend and direction of urban public traffic and private traffic development. The electric automobile has technical bottlenecks at present, the electric automobile faces the problems of charging anxiety and endurance mileage anxiety, and compared with a pure electric automobile scheme, the hybrid electric automobile is a new energy automobile solution with great advantages for realizing clean traffic and solving the anxiety of users of the electric automobile at present.
Because the hybrid electric vehicle is different from the traditional fuel oil vehicle and the pure electric vehicle, the hybrid electric vehicle is different from the traditional fuel oil vehicle and the pure electric vehicle in the aspect of the whole vehicle heat management. The thermal management system of the hybrid vehicle comprises passenger cabin air-conditioning refrigeration and heating, engine heat dissipation cooling, battery heat dissipation cooling and heating and motor electric control heat dissipation cooling. For a hybrid electric vehicle, the heat management components are more and the temperature requirements are different, so that the design of the whole vehicle heat management system is complex.
In the existing hybrid electric vehicle thermal management system, the electric motor control thermal management system and the battery thermal management system are usually independent from each other. In an electric control heat dissipation cooling system of a motor, after cooling water is pressurized by an electronic water pump, the cooling water is pumped to heating elements such as a motor controller (PCU for short), a water cooling motor water jacket or an oil cooling motor oil cooler, a charger (OBC for short) and a DCDC converter, heat of the heating elements is taken away by the cooling water, and finally the heat of the cooling water is taken away by a low-temperature radiator at the front end of the vehicle by utilizing the head-on wind of a vehicle head and forced cooling of an electronic cooling fan, so that the heating elements in the whole system are in an optimal working temperature range through regulation and control of the electronic cooling fan. In the prior art, aiming at the use process of the hybrid electric vehicle in a cold region, the temperature of a power battery is close to the parking environment temperature after the hybrid electric vehicle is parked for a long time, and the power battery can participate in the whole vehicle system to play a function after the power battery is preheated to the allowable temperature after the vehicle is started. At present, most of the prior battery thermal management systems of hybrid electric vehicles adopting liquid cooling battery packs adopt independent electric heating components to realize the preheating process of the battery packs, and weak electric energy of power batteries is used for providing electric energy for the heating components to realize low-temperature preheating of the battery packs. Because the low-temperature battery pack has limited discharge performance, the heating efficiency is relatively low, the whole vehicle energy is wasted, and in addition, when the vehicle battery pack is stored for a long time, no electric energy is input due to the electric heating part, the preheating function of the vehicle battery pack is invalid, so that the vehicle cannot be used normally. Therefore, how to design a thermal management system of a hybrid electric vehicle to improve the reliability and the heat utilization rate of the thermal management system is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a hybrid electric vehicle thermal management system so as to solve the technical problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the heat management system of the hybrid electric vehicle comprises a battery circulation waterway, a motor electric control circulation waterway, a passenger cabin heating circulation waterway and a passenger cabin refrigerating circulation loop, wherein the motor electric control circulation waterway and the battery circulation waterway share a first four-way valve, and the motor electric control circulation waterway and the battery circulation waterway can be communicated or disconnected by switching the working mode of the first four-way valve; when the motor electric control circulating waterway is communicated with the battery circulating waterway, the cooling water of the motor electric control circulating waterway can be used for heating or cooling the battery pack on the battery circulating waterway; the passenger cabin heating circulation water path and the passenger cabin refrigeration circulation loop share a combined battery cooler with the battery circulation water path respectively, the passenger cabin heating circulation water path is provided with a second four-way valve, and whether cooling water of the passenger cabin heating circulation water path flows through the combined battery cooler can be controlled by switching the working mode of the second four-way valve; when the cooling water of the passenger cabin heating circulating water channel flows through the combined battery cooler, the cooling water on the battery circulating water channel can be heated; the electronic expansion valve is arranged on the passenger cabin refrigeration cycle loop, whether the refrigerant of the passenger cabin refrigeration cycle loop flows through the combined battery cooler can be controlled by switching the working state of the electronic expansion valve, and when the refrigerant of the passenger cabin refrigeration cycle loop flows through the combined battery cooler, cooling water on the battery circulation water path can be cooled.
Preferably, the battery circulation waterway comprises a battery kettle, a second electronic water pump, the combined battery cooler, a battery pack and the first four-way valve which are arranged in series, wherein an interface a of the first four-way valve is communicated with a water outlet of the battery pack, and an interface b of the first four-way valve is communicated with a water inlet of the battery kettle; the motor electric control circulating waterway comprises a motor kettle, a first electronic water pump, a first four-way valve, a motor controller, a DCDC converter, a charger, a water-cooled motor or oil-cooled motor heat exchanger, a three-way valve and a three-way pipe I which are arranged in series, wherein the water outlet of the three-way pipe I is communicated with the water inlet of the motor kettle, the interface g of the three-way valve is communicated with the water outlet of the water-cooled motor or oil-cooled motor heat exchanger, and the interface e of the three-way valve is communicated with the first water inlet of the three-way pipe I; the motor electric control circulating waterway further comprises a first radiator arranged between an interface f of the three-way valve and a second water inlet of the three-way pipe I; the interface c of the first four-way valve is communicated with the water outlet of the first electronic water pump, and the interface d of the first four-way valve is communicated with the water inlet of the motor controller; when the working mode of the first four-way valve is mode one, an interface c is communicated with an interface b, an interface a is communicated with an interface d, and the electric control circulating waterway of the motor is communicated with the battery circulating waterway; when the working mode of the first four-way valve is a mode II, the interface c is communicated with the interface d, the interface a is communicated with the interface b, and the electric control circulating waterway of the motor is disconnected with the circulating waterway of the battery.
Preferably, when the battery needs to be heated, the working mode of the first four-way valve is a mode one, and the interface g of the control three-way valve is communicated with the interface e; when the battery needs to be cooled, the working mode of the first four-way valve is a mode I, and an interface g of the control three-way valve is communicated with an interface f; when the electric control element of the motor needs to keep warm, the working mode of the first four-way valve is a mode two, and an interface g of the control three-way valve is communicated with an interface e; when only the motor electric control element needs to be cooled, the working mode of the first four-way valve is a mode two, and the interface g of the control three-way valve is communicated with the interface f.
Preferably, the motor kettle, the first electronic water pump, the battery kettle and the second electronic water pump are integrated into a motor battery integrated module.
Preferably, the passenger cabin heating circulating waterway comprises a main water pump, an engine, a three-way pipe II, a three-way pipe III, a water heater, a three-way pipe IV, a warm air water tank, the second four-way valve and a thermostat which are arranged in series, wherein the water outlet of the thermostat is communicated with the water inlet of the main water pump; the passenger cabin heating circulating waterway further comprises the combined battery cooler, a second radiator, a third electronic water pump and an expansion kettle, wherein the water inlet of the second three-way pipe is communicated with the water outlet of the engine, the first water outlet of the second three-way pipe is communicated with the first water inlet of the third three-way pipe, the second radiator is arranged between the second water outlet of the second three-way pipe and the water inlet of the thermostat, and the water outlet of the third three-way pipe is communicated with the water inlet of the water heater; the third electronic water pump is arranged between the interface B of the second four-way valve and the second water inlet of the three-way pipe; the interface A of the second four-way valve is communicated with the water inlet of the thermostat, and the interface C of the second four-way valve is communicated with the water outlet of the warm air water tank; the water inlet of the three-way pipe IV is communicated with the water outlet of the water heater, the first water outlet of the three-way pipe IV is communicated with the water inlet of the warm air water tank, and the combined battery cooler is arranged between the interface D of the second four-way valve and the second water outlet of the three-way pipe IV; the degassing port of the expansion kettle is respectively communicated with the degassing ports of the engine, the water heater and the second radiator, and the water supplementing port of the expansion kettle is respectively communicated with the water inlets of the main water pump and the third electronic water pump; the water outlet of the water heater is provided with a second temperature sensor for detecting the water outlet temperature of the water heater.
Preferably, when the battery needs to be independently heated, if the water outlet temperature of the engine is smaller than a first set threshold value, or the water outlet temperature of the engine is not smaller than the first set threshold value and the temperature difference between the water outlet temperature of the engine and the water outlet temperature of the water heater is not smaller than a second set threshold value, the third electronic water pump is enabled to work, and the interface D and the interface B of the second four-way valve are communicated; if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump is enabled to work, and the interface D of the second four-way valve is communicated with the interface A.
Preferably, when the passenger cabin heating and the battery heating need to be performed simultaneously, if the engine water outlet temperature is smaller than a first set threshold value, or if the engine water outlet temperature is not smaller than the first set threshold value and the temperature difference between the engine water outlet temperature and the water outlet temperature of the water heater is not smaller than a second set threshold value, the third electronic water pump is enabled to work, and the interface D and the interface C of the second four-way valve are both communicated with the interface B; if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump is enabled to work, and the interface D and the interface C of the second four-way valve are communicated with the interface A.
Preferably, when the independent heating of the passenger cabin is required, if the engine water outlet temperature is smaller than a first set threshold, or the engine water outlet temperature is not smaller than the first set threshold and the temperature difference between the engine water outlet temperature and the water outlet temperature of the water heater is not smaller than a second set threshold, the third electronic water pump is enabled to work, and the interface C of the second four-way valve is enabled to be communicated with the interface B; if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump is enabled to work, and the interface C of the second four-way valve is enabled to be communicated with the interface A.
Preferably, the second four-way valve, the third electronic water pump and the expansion kettle are integrated into a warm air integration module.
Preferably, the passenger cabin refrigeration cycle loop comprises a compressor, a condenser, a three-way pipe five, an electromagnetic valve, a thermal expansion valve, an evaporator and a three-way pipe six which are arranged in series, wherein a water outlet of the three-way pipe six is communicated with a water inlet of the compressor, a first water inlet of the three-way pipe six is communicated with a water outlet of the evaporator, a water inlet of the three-way pipe five is communicated with a water outlet of the condenser, and a first water outlet of the three-way pipe five is communicated with a water inlet of the electromagnetic valve; the passenger cabin refrigeration cycle loop further comprises the electronic expansion valve and the combined battery cooler which are arranged in series between the second water outlet of the tee pipe five and the second water inlet of the tee pipe six; when the independent refrigeration of the passenger cabin is needed, the electromagnetic valve is opened, and the electronic expansion valve is closed; when the battery is required to be cooled independently, the electromagnetic valve is closed, and the electronic expansion valve is opened; when the passenger cabin refrigeration and the battery cooling are required to be performed simultaneously, the electromagnetic valve and the electronic expansion valve are both opened.
The invention has the beneficial effects that:
according to the hybrid electric vehicle heat management system, cooling water of the motor electric control circulating water channel can be used for heating or cooling the battery pack, cooling water of the passenger cabin heating circulating water channel can be used for heating the battery pack, and heating of the battery pack is achieved; meanwhile, the cooling water of the battery pack can be cooled by using the refrigerant of the passenger cabin refrigeration cycle loop, so that the battery pack is cooled. Therefore, the invention can utilize the waste heat of the heating element on the motor electric control circulating water circuit and the waste heat of the heating element on the passenger cabin heating circulating water circuit to heat the battery pack, thereby improving the reliability and the heat utilization rate of the hybrid electric vehicle heat management system, enabling the battery pack to be preheated at low temperature normally and saving energy for the vehicle.
Drawings
For a clearer description of embodiments of the present application or of the prior art, reference will be made briefly to the drawings which are required to be used in the embodiments, and a further detailed description of specific embodiments of the invention will be given with reference to the accompanying drawings, in which
Fig. 1 is a schematic diagram of a thermal management system for a hybrid electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an electric control circulation waterway and a battery circulation waterway of a motor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a passenger compartment heating circulation waterway and a battery circulation waterway according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a passenger compartment refrigeration cycle circuit and a battery circulation water path according to an embodiment of the present invention.
The reference numerals in the drawings:
11. a motor kettle 12, a first electronic water pump 13, a motor controller,
14. a DCDC converter, 15, a charger, 16, a water-cooled motor or an oil-cooled motor heat exchanger,
17. the three-way valve 18, the first three-way pipe 19 and the first radiator;
21. a battery water kettle 22, a second electronic water pump 23 and a combined battery cooler,
24. a battery pack; 31. a main water pump, 32, an engine, 33 and a three-way pipe,
34. three-way pipe III, 35, water heater, 36, three-way pipe IV, 37, warm air water tank,
38. a second radiator 39, thermostat; 41. an expansion kettle, 42, a third electronic water pump;
51. a compressor 52, a condenser 53, a three-way pipe five, 54 and an electromagnetic valve,
55. the thermal expansion valve 56, the evaporator 57, the three-way pipe six, 58 and the electronic expansion valve;
61. the first four-way valve, 62, the second four-way valve; 71. a first one of the temperature sensors is provided with a first temperature sensor,
72. a second temperature sensor 73, a third temperature sensor 74, a fourth temperature sensor,
75. and a fifth temperature sensor.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present solution will be described in further detail with reference to specific embodiments.
As shown in fig. 1 to 4, an embodiment of the present invention provides a thermal management system for a hybrid electric vehicle, which includes a battery circulation water path, a motor electric control circulation water path, a passenger cabin heating circulation water path, and a passenger cabin refrigeration circulation loop, wherein the motor electric control circulation water path and the battery circulation water path share a first four-way valve 61, and the motor electric control circulation water path and the battery circulation water path can be connected or disconnected by switching the working mode of the first four-way valve 61; when the motor electric control circulating waterway is communicated with the battery circulating waterway, the cooling water of the motor electric control circulating waterway can be used for heating or cooling the battery pack on the battery circulating waterway; the passenger cabin heating circulation water path and the passenger cabin refrigeration circulation loop share the combined battery cooler 23 with the battery circulation water path respectively, the passenger cabin heating circulation water path is provided with a second four-way valve 62, and whether cooling water of the passenger cabin heating circulation water path flows through the combined battery cooler 23 can be controlled by switching the working mode of the second four-way valve 62; when the cooling water of the passenger cabin heating circulating water channel flows through the combined battery cooler, the cooling water on the battery circulating water channel can be heated; the electronic expansion valve 58 is provided in the passenger compartment refrigeration cycle, and the operation state of the electronic expansion valve is switched to control whether or not the refrigerant in the passenger compartment refrigeration cycle flows through the combined battery cooler, so that the cooling water in the battery circulation water path can be cooled when the refrigerant in the passenger compartment refrigeration cycle flows through the combined battery cooler.
The hybrid electric vehicle heat management system provided by the embodiment of the invention can heat or cool the battery pack by using the cooling water of the motor electric control circulating waterway, and can heat the cooling water of the battery pack by using the cooling water of the passenger cabin heating circulating waterway, so that the battery pack is heated; meanwhile, the cooling water of the battery pack can be cooled by using the refrigerant of the passenger cabin refrigeration cycle loop, so that the battery pack is cooled. Therefore, the invention can utilize the waste heat of the heating element on the motor electric control circulating water circuit and the waste heat of the heating element (namely the engine) on the passenger cabin heating circulating water circuit to heat the battery pack, thereby improving the reliability and the heat utilization rate of the hybrid electric vehicle heat management system, enabling the battery pack to be preheated at low temperature normally and enabling the vehicle to be energy-saving.
Further, as shown in fig. 2, the battery circulation water path includes a battery water bottle 21, a second electronic water pump 22, the combined battery cooler 23, a battery pack 24, and the first four-way valve 61, wherein an interface a of the first four-way valve 61 is communicated with a water outlet of the battery pack 24, and an interface b of the first four-way valve 61 is communicated with a water inlet of the battery water bottle 21; the motor electric control circulating waterway comprises a motor kettle 11, a first electronic water pump 12, a first four-way valve 61, a motor controller 13, a DCDC converter 14, a charger 15, a water-cooling motor or oil-cooling motor heat exchanger 16, a three-way valve 17 and a three-way pipe I18 which are arranged in series, wherein a water outlet of the three-way pipe I is communicated with a water inlet of the motor kettle, an interface g of the three-way valve is communicated with a water outlet of the water-cooling motor or oil-cooling motor heat exchanger, and an interface e of the three-way valve is communicated with a first water inlet of the three-way pipe I; the motor electric control circulating waterway further comprises a first radiator 19 arranged between an interface f of the three-way valve 17 and a second water inlet of the three-way pipe I18; the interface c of the first four-way valve is communicated with the water outlet of the first electronic water pump, and the interface d of the first four-way valve is communicated with the water inlet of the motor controller; when the working mode of the first four-way valve is mode one, an interface c is communicated with an interface b, an interface a is communicated with an interface d, and the electric control circulating waterway of the motor is communicated with the battery circulating waterway; when the working mode of the first four-way valve is a mode II, the interface c is communicated with the interface d, the interface a is communicated with the interface b, and the electric control circulating waterway of the motor is disconnected with the circulating waterway of the battery.
Specifically, when the battery needs to be heated, the thermal management controller makes the working mode of the first four-way valve 61 be mode one, and controls the interface g of the three-way valve to be communicated with the interface e; at this time, after the cooling water of the motor kettle is pressurized by the first electronic water pump, the cooling water flows through an interface c of the first four-way valve, an interface b of the first four-way valve, the battery kettle, the second electronic water pump, the combined battery cooler (namely, three-in three-out battery cooler), the battery pack, an interface a of the first four-way valve, an interface d of the first four-way valve, a motor controller (PCU for short in English), a DCDC converter, a charger (OBC for short in English), a water-cooled motor or oil-cooled motor heat exchanger, an interface g of the three-way valve, an interface e of the three-way valve, a first water inlet of the three-way pipe, a water outlet of the three-way pipe, the motor kettle and the first electronic water pump are circulated, so that the waste heat of a motor electric control heating element (such as the motor controller, the DCDC converter, the charger, the water-cooled motor or the oil-cooled motor heat exchanger) can be utilized to heat the battery in an auxiliary mode, and the utilization of waste heat is realized.
When the battery needs to be cooled, the working mode of the first four-way valve 61 is set to be a mode one, and an interface g of the control three-way valve is communicated with an interface f; at the moment, after the cooling water of the motor kettle is pressurized by the first electronic water pump, the cooling water flows through an interface c of the first four-way valve, an interface b of the first four-way valve, the battery kettle, the second electronic water pump, the combined battery cooler, the battery pack, an interface a of the first four-way valve, an interface d of the first four-way valve, a motor controller, a DCDC converter, a charger, a water-cooled motor or an oil-cooled motor heat exchanger, an interface g of the three-way valve, an interface f of the three-way valve, a first radiator, a second water inlet of the first three-way pipe, a water outlet of the first three-way pipe, the motor kettle and the first electronic water pump to circulate, so that the cooling water can be cooled through the windward blowing to the first radiator and the electronic cooling fan in the first radiator, and the battery pack is regulated and cooled.
When the electric control element of the motor needs to keep warm, the working mode of the first four-way valve is a mode two, and an interface g of the control three-way valve is communicated with an interface e; at this time, after the cooling water of the motor kettle is pressurized by the first electronic water pump, the cooling water flows through the interface c of the first four-way valve, the interface d of the first four-way valve, the motor controller, the DCDC converter, the charger, the water-cooled motor or the oil-cooled motor heat exchanger, the interface g of the three-way valve, the interface e of the three-way valve, the first water inlet of the three-way pipe, the water outlet of the three-way pipe, the motor kettle and the first electronic water pump to circulate, at this time, the cooling water is prevented from flowing through the first radiator, and the cooling water temperature is prevented from being reduced, so that the temperature reduction of electric control elements of each motor is avoided.
When only the motor electric control element needs to be cooled, the working mode of the first four-way valve is a mode two, and an interface g of the control three-way valve is communicated with an interface f; at the moment, after the cooling water of the motor kettle is pressurized by the first electronic water pump, the cooling water flows through an interface c of the first four-way valve, an interface d of the first four-way valve, a motor controller, a DCDC converter, a charger, a water-cooled motor or an oil-cooled motor heat exchanger, an interface g of the three-way valve, an interface f of the three-way valve, a first radiator, a second water inlet of the first three-way pipe, a water outlet of the first three-way pipe, the motor kettle and the first electronic water pump to circulate, and at the moment, the cooling strength of the first radiator can be regulated and controlled by regulating and controlling the electronic cooling fan in the first radiator, so that the temperature of the cooling water is regulated and controlled, and the temperature control of electric control heating elements of all motors can be realized.
It will be appreciated that the water inlet of the battery pack may be provided with a third temperature sensor 73 for detecting the water temperature on the battery circulation water path, the water inlet of the motor controller may be provided with a fourth temperature sensor 74 for detecting the water temperature of the cooling water on the motor electric control circulation water path, the third temperature sensor and the fourth temperature sensor are respectively electrically connected with the thermal management controller, and the thermal management controller controls the operation state of the three-way valve and the operation mode of the first four-way valve according to the temperature values of the third temperature sensor and the fourth temperature sensor, so as to achieve the four working requirements.
It may be preferable that the motor kettle 11, the first electronic water pump 12, the battery kettle 21, and the second electronic water pump 22 are integrated as a motor battery integrated module, so that an arrangement space can be effectively saved.
Further, as shown in fig. 3, the passenger cabin heating circulation water path includes a main water pump 31, an engine 32, a two-way pipe 33, a three-way pipe three 34, a water heater 35, a four-way pipe 36, a warm air water tank 37, the second four-way valve 62, and a thermostat 39 which are arranged in series, wherein a water outlet of the thermostat 39 is communicated with a water inlet of the main water pump 31; the passenger cabin heating circulating water way further comprises the combined battery cooler 23, a second radiator 38, a third electronic water pump 42 and an expansion kettle 41, wherein a water inlet of the second three-way pipe is communicated with a water outlet of the engine, a first water outlet of the second three-way pipe is communicated with a first water inlet of the third three-way pipe, the second radiator 38 is arranged between a second water outlet of the second three-way pipe 33 and a water inlet of the thermostat 39, and a water outlet of the third three-way pipe is communicated with a water inlet of the water heater; the third electronic water pump 42 is arranged between the interface B of the second four-way valve and the second water inlet of the three-way pipe; the interface A of the second four-way valve is communicated with the water inlet of the thermostat, and the interface C of the second four-way valve is communicated with the water outlet of the warm air water tank; the water inlet of the three-way pipe IV is communicated with the water outlet of the water heater, the first water outlet of the three-way pipe IV is communicated with the water inlet of the warm air water tank, and the combined battery cooler is arranged between the interface D of the second four-way valve and the second water outlet of the three-way pipe IV; the degassing port of the expansion kettle 41 is respectively communicated with the degassing ports of the engine, the water heater and the second radiator, and the water supplementing port of the expansion kettle is respectively communicated with the water inlets of the main water pump and the third electronic water pump; a first temperature sensor 71 for detecting the temperature of the water discharged from the engine is arranged at the water outlet of the engine, and a second temperature sensor 72 for detecting the temperature of the water discharged from the water heater is arranged at the water outlet of the water heater.
Specifically, when the battery needs to be heated alone:
if the engine outlet water temperature (i.e. the temperature value of the first temperature sensor) is less than the first set threshold, or the engine outlet water temperature is not less than the first set threshold and the temperature difference between the engine outlet water temperature and the water heater outlet water temperature (i.e. the temperature value of the second temperature sensor) is not less than the second set threshold, the thermal management controller enables the third electronic water pump 42 to work and enables the interface D of the second four-way valve to be communicated with the interface B; at this time, the cooling water of the expansion kettle circulates through the three-way pipe three-way water heater (English is called WPTC for short), the four-way pipe, the combined battery cooler, the interface D of the second four-way valve, the interface B of the second four-way valve and the third electronic water pump, and meanwhile when the cooling water of the passenger cabin heating circulation waterway flows through the combined battery cooler, heat is transferred to the cooling water of the battery circulation waterway in a heat exchange mode, so that the cooling water in the battery circulation waterway is heated, and the heating of the battery pack 24 is realized; the heat management controller adjusts the heating power of the water heater according to the temperature value of the third temperature sensor so that the temperature value of the third temperature sensor can reach a set target value, and the battery pack is heated to a required temperature;
if the temperature of the engine water outlet is not less than the first set threshold value and the temperature difference between the engine water outlet temperature and the water outlet temperature of the water heater is less than the second set threshold value, the main water pump 31 is operated, and the interface D of the second four-way valve is communicated with the interface A; at the moment, cooling water of the expansion kettle flows through an engine (an engine water jacket) through a main water pump, is divided into two paths through a three-way pipe III, a water heater, a four-way pipe IV, a combined battery cooler, an interface D of a second four-way valve, an interface A of the second four-way valve, a thermostat and a main water pump 31 for circulation, and the other path circulates through a second radiator, the thermostat and the main water pump; the cooling water in the passenger cabin heating circulating water channel flows through the combined battery cooler, and heat is transferred to the cooling water in the battery circulating water channel in a heat exchange mode, so that the cooling water in the battery circulating water channel is heated, and the battery pack is heated by using the waste heat of the engine; the thermal management controller adjusts the rotating speed of the electronic cooling fan of the second radiator according to the temperature value of the first temperature sensor, so that the cooling intensity is adjusted, and the temperature of cooling water is adjusted.
Further, when passenger compartment heating and battery heating need to be performed simultaneously:
if the engine water outlet temperature is less than the first set threshold, or the engine water outlet temperature is not less than the first set threshold and the temperature difference between the engine water outlet temperature and the water outlet temperature of the water heater is not less than the second set threshold, the third electronic water pump 42 is operated, and the interface D and the interface C of the second four-way valve are communicated with the interface B; at the moment, cooling water of the expansion kettle flows through a three-way pipe three-way water heater-three-way pipe four-way pipe and then is divided into two branches, one branch circulates through a warm air water tank-an interface C of a second four-way valve-an interface B of the second four-way valve-the third electronic water pump, the branch is used for increasing the water temperature in the warm air water tank, and then a blower is used for transmitting the hot water of the warm air water tank to an air conditioner air duct in a heat exchange mode, so that the heating requirement of a passenger cabin is met; the other branch circulates through the combined battery cooler, the interface D of the second four-way valve, the interface B of the second four-way valve and the third electronic water pump;
if the temperature of the engine water outlet is not less than the first set threshold value and the temperature difference between the engine water outlet temperature and the water outlet temperature of the water heater is less than the second set threshold value, the main water pump 31 is enabled to work, and the interface D and the interface C of the second four-way valve are communicated with the interface A; at the moment, cooling water of the expansion kettle flows through the engine and the three-way pipe II through the main water pump and then is divided into two paths, and one path circulates through the second radiator, the thermostat and the main water pump; the other branch is divided into two branches after passing through a three-way pipe three-water heater-four-way pipe, one branch circulates through a combined battery cooler-an interface D of a second four-way valve-an interface A of the second four-way valve-a thermostat-a main water pump, and the other branch circulates through a warm air water tank-an interface C of the second four-way valve-an interface A of the second four-way valve-a main water pump, so that waste heat of an engine can be utilized to heat a passenger cabin through the branch.
It can be appreciated that when the battery is heated only by the passenger compartment heating circulation water path, the cooling water circulation path of the battery circulation water path is: battery kettle, second electronic water pump, combined battery cooler, battery pack, interface a of the first four-way valve, interface b of the first four-way valve and battery kettle.
Further, when the independent heating of the passenger cabin is required:
if the engine water outlet temperature is less than the first set threshold, or the engine water outlet temperature is not less than the first set threshold and the temperature difference between the engine water outlet temperature and the water outlet temperature of the water heater is not less than the second set threshold, the third electronic water pump 42 is operated, and the interface C and the interface B of the second four-way valve are communicated; at the moment, cooling water of the expansion kettle flows through a three-way pipe III, a water heater, a four-way pipe IV, a warm air water tank, an interface C of a second four-way valve, an interface B of the second four-way valve and the third electronic water pump for circulation; the thermal management controller regulates and controls the heating power of the water heater according to the temperature value of the second temperature sensor until the temperature value reaches a set requirement value, so that the heating requirement of the passenger cabin is met;
if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump 31 is enabled to work, the interface C of the second four-way valve is enabled to be communicated with the interface A, at the moment, cooling water of the expansion kettle flows through the engine through the main water pump, the three-way pipe II and then is divided into two paths, one path flows through the three-way pipe III, the water heater, the four-way pipe IV, the warm air water tank, the interface C of the second four-way valve, the thermostat and the main water pump to circulate, and heating of a passenger cabin is achieved by using waste heat of the engine; the other path circulates through the second radiator, the thermostat and the main water pump.
Specifically, the value range of the first set threshold is 65 ℃ to 75 ℃, and can be preferably 70 ℃; the second set threshold value is 8-10deg.C, preferably 9deg.C.
Preferably, the second four-way valve 62, the third electronic water pump 42 and the expansion kettle 41 are integrated into a warm air integrated module, so that each part is compact, and space is saved. It is to be understood that the first radiator 19 may be a low-temperature radiator for radiating the cooling water of the electric control circulation water path of the motor; the second radiator 38 is a high-temperature radiator for radiating cooling water of the engine; the expansion kettle 41 is a high-temperature kettle, and has the functions of water supplementing and pressure maintaining as in the prior art, and is not described herein.
Further, as shown in fig. 4, the passenger cabin refrigeration cycle circuit includes a compressor 51, a condenser 52, a three-way pipe five 53, an electromagnetic valve 54, a thermal expansion valve 55, an evaporator 56, and a three-way pipe six 57, wherein a water outlet of the three-way pipe six is communicated with a water inlet of the compressor, a first water inlet of the three-way pipe six is communicated with a water outlet of the evaporator, a water inlet of the three-way pipe five is communicated with a water outlet of the condenser, and a first water outlet of the three-way pipe five is communicated with a water inlet of the electromagnetic valve; the passenger cabin refrigeration cycle circuit further comprises the electronic expansion valve 58 and the combined battery cooler 23 which are arranged in series between the second water outlet of the tee pipe five and the second water inlet of the tee pipe six; when the independent refrigeration of the passenger cabin is required, the electromagnetic valve 54 is opened, the electronic expansion valve is closed, and the refrigerant circulates through the compressor, the condenser, the three-way pipe five, the electromagnetic valve, the thermal expansion valve (TXV for short), the evaporator, the three-way pipe six and the compressor; a sixth temperature sensor is arranged at the water outlet of the evaporator, and the thermal management controller regulates and controls the power of the compressor according to the temperature value of the sixth temperature sensor, namely the outlet temperature value of the evaporator, so as to meet the refrigeration requirement of the passenger cabin;
when the battery is required to be cooled independently, the electromagnetic valve is closed, the electronic expansion valve 58 is opened, and at the moment, the refrigerant circulates through the compressor, the condenser, the three-way pipe five, the electronic expansion valve (English abbreviation EXV), the combined battery cooler, the three-way pipe six and the compressor; a fifth temperature sensor 75 is arranged between the combined battery cooler and the three-way pipe six, and the thermal management controller regulates and controls the power of the compressor and the opening of the electronic expansion valve according to the temperature value of the fifth temperature sensor so as to meet the cooling requirement of the battery pack;
when the passenger cabin refrigeration and the battery cooling are required to be carried out simultaneously, the electromagnetic valve 54 and the electronic expansion valve 58 are both opened, at the moment, the refrigerant is divided into two paths through the compressor 51, the condenser 52, the three-way pipe five 53 and then circulates through the electromagnetic valve 54, the thermal expansion valve 55, the evaporator 56, the three-way pipe six 57 and the compressor 51, and the refrigeration of the passenger cabin is realized by the evaporator 56; the other path circulates through the electronic expansion valve 58, the combined battery cooler 23, the three-way pipe six 57 and the compressor 51.
The invention can realize heating by using the waste heat of the engine, can heat by using the WPTC when the engine is not started, and also gives consideration to the heat management of the battery, thereby providing a set of more compact integrated design scheme of the hybrid heat management system and reducing the cost and the installation and arrangement difficulty; meanwhile, the heat management and reasonable distribution utilization of the whole hybrid electric vehicle can be realized, the cooling and heating requirements of the vehicle under various working conditions are met, and the purposes of saving energy, reducing emission and prolonging the endurance mileage can be achieved.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, and that various changes and modifications may be made by one skilled in the art after reading the present disclosure, and the equivalent forms thereof fall within the scope of the appended claims.

Claims (10)

1. The heat management system of the hybrid electric vehicle is characterized by comprising a battery circulation waterway, a motor electric control circulation waterway, a passenger cabin heating circulation waterway and a passenger cabin refrigerating circulation loop, wherein the motor electric control circulation waterway and the battery circulation waterway share a first four-way valve, and the motor electric control circulation waterway and the battery circulation waterway can be communicated or disconnected by switching the working mode of the first four-way valve; when the motor electric control circulating waterway is communicated with the battery circulating waterway, the cooling water of the motor electric control circulating waterway can be used for heating or cooling the battery pack on the battery circulating waterway; the passenger cabin heating circulation water path and the passenger cabin refrigeration circulation loop share a combined battery cooler with the battery circulation water path respectively, the passenger cabin heating circulation water path is provided with a second four-way valve, and whether cooling water of the passenger cabin heating circulation water path flows through the combined battery cooler can be controlled by switching the working mode of the second four-way valve; when the cooling water of the passenger cabin heating circulating water channel flows through the combined battery cooler, the cooling water on the battery circulating water channel can be heated; the electronic expansion valve is arranged on the passenger cabin refrigeration cycle loop, whether the refrigerant of the passenger cabin refrigeration cycle loop flows through the combined battery cooler can be controlled by switching the working state of the electronic expansion valve, and when the refrigerant of the passenger cabin refrigeration cycle loop flows through the combined battery cooler, cooling water on the battery circulation water path can be cooled.
2. The hybrid electric vehicle thermal management system of claim 1, wherein the battery circulation waterway comprises a battery water kettle, a second electronic water pump, the combined battery cooler, a battery pack and the first four-way valve which are arranged in series, wherein an interface a of the first four-way valve is communicated with a water outlet of the battery pack, and an interface b of the first four-way valve is communicated with a water inlet of the battery water kettle; the motor electric control circulating waterway comprises a motor kettle, a first electronic water pump, a first four-way valve, a motor controller, a DCDC converter, a charger, a water-cooled motor or oil-cooled motor heat exchanger, a three-way valve and a three-way pipe I which are arranged in series, wherein the water outlet of the three-way pipe I is communicated with the water inlet of the motor kettle, the interface g of the three-way valve is communicated with the water outlet of the water-cooled motor or oil-cooled motor heat exchanger, and the interface e of the three-way valve is communicated with the first water inlet of the three-way pipe I; the motor electric control circulating waterway further comprises a first radiator arranged between an interface f of the three-way valve and a second water inlet of the three-way pipe I; the interface c of the first four-way valve is communicated with the water outlet of the first electronic water pump, and the interface d of the first four-way valve is communicated with the water inlet of the motor controller; when the working mode of the first four-way valve is mode one, an interface c is communicated with an interface b, an interface a is communicated with an interface d, and the electric control circulating waterway of the motor is communicated with the battery circulating waterway; when the working mode of the first four-way valve is a mode II, the interface c is communicated with the interface d, the interface a is communicated with the interface b, and the electric control circulating waterway of the motor is disconnected with the circulating waterway of the battery.
3. The hybrid electric vehicle thermal management system of claim 2, wherein when the battery needs to be heated, the working mode of the first four-way valve is set to be mode one, and the interface g of the control three-way valve is communicated with the interface e;
when the battery needs to be cooled, the working mode of the first four-way valve is a mode I, and an interface g of the control three-way valve is communicated with an interface f;
when the electric control element of the motor needs to keep warm, the working mode of the first four-way valve is a mode two, and an interface g of the control three-way valve is communicated with an interface e;
when only the motor electric control element needs to be cooled, the working mode of the first four-way valve is a mode two, and the interface g of the control three-way valve is communicated with the interface f.
4. The hybrid vehicle thermal management system of claim 2, wherein the motor kettle, the first electronic water pump, the battery kettle, and the second electronic water pump are integrated as a motor battery integrated module.
5. The hybrid electric vehicle thermal management system of claim 1, wherein the passenger compartment heating circulation waterway comprises a main water pump, an engine, a tee pipe two, a tee pipe three, a water heater, a tee pipe four, a warm air water tank, the second four-way valve and a thermostat which are arranged in series, and a water outlet of the thermostat is communicated with a water inlet of the main water pump; the passenger cabin heating circulating waterway further comprises the combined battery cooler, a second radiator, a third electronic water pump and an expansion kettle, wherein the water inlet of the second three-way pipe is communicated with the water outlet of the engine, the first water outlet of the second three-way pipe is communicated with the first water inlet of the third three-way pipe, the second radiator is arranged between the second water outlet of the second three-way pipe and the water inlet of the thermostat, and the water outlet of the third three-way pipe is communicated with the water inlet of the water heater; the third electronic water pump is arranged between the interface B of the second four-way valve and the second water inlet of the three-way pipe; the interface A of the second four-way valve is communicated with the water inlet of the thermostat, and the interface C of the second four-way valve is communicated with the water outlet of the warm air water tank; the water inlet of the three-way pipe IV is communicated with the water outlet of the water heater, the first water outlet of the three-way pipe IV is communicated with the water inlet of the warm air water tank, and the combined battery cooler is arranged between the interface D of the second four-way valve and the second water outlet of the three-way pipe IV; the degassing port of the expansion kettle is respectively communicated with the degassing ports of the engine, the water heater and the second radiator, and the water supplementing port of the expansion kettle is respectively communicated with the water inlets of the main water pump and the third electronic water pump; the water outlet of the water heater is provided with a second temperature sensor for detecting the water outlet temperature of the water heater.
6. The hybrid electric vehicle thermal management system of claim 4, wherein when the battery is required to be heated separately, if the engine outlet water temperature is less than a first set threshold, or if the engine outlet water temperature is not less than the first set threshold and the temperature difference between the engine outlet water temperature and the water heater outlet water temperature is not less than a second set threshold, then operating the third electric water pump and communicating the interface D of the second four-way valve with the interface B;
if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump is enabled to work, and the interface D of the second four-way valve is communicated with the interface A.
7. The hybrid electric vehicle thermal management system of claim 4, wherein when passenger compartment heating and battery heating are required to be performed simultaneously, if the engine outlet water temperature is less than a first set threshold, or the engine outlet water temperature is not less than the first set threshold and the temperature difference between the engine outlet water temperature and the water heater outlet water temperature is not less than a second set threshold, the third electric water pump is operated, and the interface D and the interface C of the second four-way valve are both communicated with the interface B;
if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump is enabled to work, and the interface D and the interface C of the second four-way valve are communicated with the interface A.
8. The hybrid electric vehicle thermal management system according to claim 4, wherein when the independent heating of the passenger compartment is required, if the engine outlet water temperature is less than a first set threshold, or if the engine outlet water temperature is not less than the first set threshold and the temperature difference between the engine outlet water temperature and the water heater outlet water temperature is not less than a second set threshold, the third electric water pump is operated, and the interface C of the second four-way valve is communicated with the interface B;
if the temperature of the outlet water of the engine is not less than the first set threshold value and the temperature difference between the temperature of the outlet water of the engine and the temperature of the outlet water of the water heater is less than the second set threshold value, the main water pump is enabled to work, and the interface C of the second four-way valve is enabled to be communicated with the interface A.
9. The hybrid vehicle thermal management system of claim 5, wherein the second four-way valve, the third electronic water pump, and the expansion kettle are integrated as a warm air integration module.
10. The hybrid electric vehicle thermal management system of claim 1, wherein the passenger compartment refrigeration cycle circuit comprises a compressor, a condenser, a tee five, an electromagnetic valve, a thermal expansion valve, an evaporator, and a tee six arranged in series, wherein a water outlet of the tee six is communicated with a water inlet of the compressor, a first water inlet of the tee six is communicated with a water outlet of the evaporator, a water inlet of the tee five is communicated with a water outlet of the condenser, and a first water outlet of the tee five is communicated with a water inlet of the electromagnetic valve; the passenger cabin refrigeration cycle loop further comprises the electronic expansion valve and the combined battery cooler which are arranged in series between the second water outlet of the tee pipe five and the second water inlet of the tee pipe six;
when the independent refrigeration of the passenger cabin is needed, the electromagnetic valve is opened, and the electronic expansion valve is closed; when the battery is required to be cooled independently, the electromagnetic valve is closed, and the electronic expansion valve is opened; when the passenger cabin refrigeration and the battery cooling are required to be performed simultaneously, the electromagnetic valve and the electronic expansion valve are both opened.
CN202310468788.8A 2023-04-27 2023-04-27 Hybrid electric vehicle thermal management system Pending CN116278626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310468788.8A CN116278626A (en) 2023-04-27 2023-04-27 Hybrid electric vehicle thermal management system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310468788.8A CN116278626A (en) 2023-04-27 2023-04-27 Hybrid electric vehicle thermal management system

Publications (1)

Publication Number Publication Date
CN116278626A true CN116278626A (en) 2023-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310468788.8A Pending CN116278626A (en) 2023-04-27 2023-04-27 Hybrid electric vehicle thermal management system

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Country Link
CN (1) CN116278626A (en)

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