CN113752805A - Thermal management system for hybrid vehicles - Google Patents

Thermal management system for hybrid vehicles Download PDF

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Publication number
CN113752805A
CN113752805A CN202110968585.6A CN202110968585A CN113752805A CN 113752805 A CN113752805 A CN 113752805A CN 202110968585 A CN202110968585 A CN 202110968585A CN 113752805 A CN113752805 A CN 113752805A
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China
Prior art keywords
cooling
radiator
pipeline
temperature radiator
water
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Granted
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CN202110968585.6A
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Chinese (zh)
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CN113752805B (en
Inventor
韩燕茹
商昌宁
鲁彬
熊怡华
李贵宾
凌学锋
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Zhejiang Geely Holding Group Co Ltd
Zhejiang Liankong Technologies Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Geely Automobile Research Institute Ningbo Co Ltd
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Priority to CN202110968585.6A priority Critical patent/CN113752805B/en
Publication of CN113752805A publication Critical patent/CN113752805A/en
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    • 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
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • 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
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The present application provides a thermal management system for a hybrid vehicle. The method comprises the following steps: in the heat management system of the hybrid vehicle, an engine cooling subsystem comprises a high-temperature radiator, a motor cooling subsystem comprises a medium-temperature radiator, and a battery cooling subsystem comprises a water-cooling and inter-cooling radiator. The high-temperature radiator, the warm radiator and the water-cooling inter-cooling radiator can be arranged in a centralized way. Meanwhile, a cooling device can be arranged to realize the centralized heat dissipation of the high-temperature radiator, the warm radiator and the water-cooling and inter-cooling radiator. The method saves the arrangement space and saves the cost on the basis of ensuring the heat dissipation effect.

Description

Thermal management system for hybrid vehicles
Technical Field
The application relates to the technical field of heat exchange, in particular to a thermal management system of a hybrid vehicle.
Background
With the increasingly appearing world energy problems, energy conservation and environmental protection become important directions for the development of the automobile industry. As a new generation of clean automobiles with low fuel consumption and low pollution, hybrid automobiles are gradually moving to the world stage and are receiving wide attention from the industry and experts and scholars.
At present, a thermal management system of a hybrid vehicle includes passenger compartment air-conditioning cooling/engine heating, battery low-temperature radiator cooling, motor low-temperature radiator cooling, and the like. For the thermal management system, the front-end device commonly used in the prior art may include a battery radiator, a motor radiator, an engine high-temperature radiator, and the like.
However, in the prior art, the thermal management systems and the front-end equipment thereof are usually separately arranged, and under the requirement of compact space of a vehicle, the problem of insufficient space of a front cabin exists
Disclosure of Invention
The application provides a thermal management system of a hybrid vehicle, which is used for solving the problem that the space of a front cabin is insufficient under the requirement of a compact space of the vehicle.
In a first aspect, the present application provides a thermal management system for a hybrid vehicle, comprising: the system comprises an engine cooling subsystem, a motor cooling subsystem, a battery cooling subsystem and a cooling device;
the high-temperature radiator of the engine cooling subsystem, the medium-temperature radiator of the motor cooling subsystem and the water-cooling inter-cooling radiator of the battery cooling subsystem are arranged in a centralized manner;
the cooling device is arranged behind the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator and is used for assisting the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator in heat dissipation.
Optionally, the high-temperature radiator of the engine cooling subsystem, the medium-temperature radiator of the motor cooling subsystem, and the water-cooling inter-cooling radiator of the battery cooling subsystem are collectively disposed, including:
the high-temperature radiator and the medium-temperature radiator are horizontally arranged in parallel, and are separated by an intermediate structure;
the high-temperature radiator and the medium-temperature radiator which are arranged in parallel are positioned between the water-cooling inter-cooling radiator and the cooling device; the water-cooling inter-cooling radiator, the high-temperature radiator and the medium-temperature radiator which are arranged in parallel and the cooling device are horizontally arranged from front to back in sequence.
Optionally, the high-temperature radiator of the engine cooling subsystem, the medium-temperature radiator of the motor cooling subsystem, and the water-cooling inter-cooling radiator of the battery cooling subsystem are collectively disposed, including:
the water-cooling inter-cooling radiator, the medium-temperature radiator, the high-temperature radiator and the cooling device are horizontally arranged from front to back in sequence.
Optionally, the engine cooling subsystem comprises: the system comprises a high-temperature radiator, an engine pipeline, a thermostat and a main electronic water pump;
the main electronic water pump is connected with the engine pipeline through a pipeline, cooling liquid in the pipeline presses the cooling liquid to the engine pipeline through the main electronic water pump, and the engine pipeline is located on the surfaces of a cylinder body and a cylinder cover of the engine;
the engine pipeline is connected with the thermostat through a pipeline, and when the thermostat judges that the temperature of the cooling liquid in the pipeline is greater than or equal to a first threshold value, the thermostat is connected with the high-temperature radiator through the pipeline; otherwise, the thermostat is connected with the main electronic water pump through the pipeline.
Optionally, the engine cooling subsystem further comprises: the system comprises a switch valve, a waste gas recirculation assembly and an air conditioner warm air core body;
when the air conditioner warm air of the passenger compartment is started, the switch valve is opened, the engine pipeline is connected with the exhaust gas recirculation assembly through a pipeline, and the cooling liquid in the pipeline is heated by the exhaust gas recirculation assembly;
the exhaust gas recirculation assembly is connected with the air-conditioning heater core body through the pipeline, and the cooling liquid in the pipeline exchanges heat through the air-conditioning heater core body to transfer heat in the cooling liquid into the passenger compartment;
the air-conditioning warm air core body is connected with the main electronic water pump through a pipeline.
Optionally, the motor cooling subsystem comprises: the system comprises a motor pipeline, an electric drive water pump and a medium temperature radiator;
the motor pipeline, the electric drive water pump and the medium temperature radiator are sequentially connected through a pipeline to form a loop; the electrically-driven water pump is used for driving the cooling liquid in the pipeline to flow in the loop.
Optionally, the battery cooling subsystem cooling system comprises: a first loop, a second loop and a low temperature radiator;
the first circuit and the second circuit are connected through the low-temperature radiator, and the low-temperature radiator is used for exchanging heat in the first circuit to the second circuit;
the first loop comprises a battery pipeline, a battery water pump and a gas-liquid separator which are sequentially connected through pipelines to form a loop; the battery water pump is used for driving the cooling liquid in the first circuit to flow in the first circuit;
the second loop comprises a water-cooling inter-cooling radiator, a water-cooling inter-cooling radiator and a heat dissipation water pump, and the heat dissipation water pump, the water-cooling inter-cooling radiator and the water-cooling inter-cooling radiator are sequentially connected through pipelines to form a loop; the heat dissipation water pump is used for driving the cooling liquid in the second loop to flow in the second loop.
Optionally, the battery cooling subsystem cooling system further comprises: a third loop and a water cooled condenser;
the first circuit and the third circuit are connected through the low-temperature radiator, and the low-temperature radiator is used for exchanging heat in the first circuit to the third circuit; the second loop and the third loop are connected through the water-cooled condenser, and the water-cooled condenser is used for exchanging heat in the second loop into the third loop;
the third loop comprises an air conditioner compressor, an evaporator, two electromagnetic valves and two expansion valves; the air conditioner compressor is connected with the water-cooled condenser through a pipeline; the water-cooled condenser is connected with the low-temperature radiator through a pipeline, and the electromagnetic valve and the expansion valve are arranged on the pipeline; the water-cooled condenser is connected with the evaporator through a pipeline, and the electromagnetic valve and the expansion valve are arranged on the pipeline; the low-temperature radiator and the evaporator are respectively connected with the air-conditioning compressor through pipelines.
In a second aspect, the present application provides a hybrid vehicle comprising a thermal management system of the hybrid vehicle of the first aspect and any one of the possible designs of the first aspect.
Optionally, the high-temperature radiator, the medium-temperature radiator, the water-cooling inter-cooling radiator and the cooling device which are arranged in a centralized manner are located behind a front bumper of the hybrid vehicle.
According to the heat management system of the hybrid vehicle, the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator are arranged in a concentrated mode, so that the effects of saving arrangement space and saving cost on the basis of ensuring the heat dissipation effect are achieved.
Drawings
In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a centralized heat sink according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a centralized heat sink according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application.
Reference numerals:
11: an engine cooling subsystem; 111: a main electronic water pump; 112: a high temperature heat sink; 113: an engine line; 114: a thermostat; 115: an air conditioning warm air core body; 116: an on-off valve; 117: an exhaust gas recirculation assembly; 118: a turbocharger; 119: an expansion tank;
12: a motor cooling subsystem; 121: an electrically driven water pump; 122: a medium temperature radiator; 123: a motor pipeline; 1231: a DC converter; 1232: a motor controller; 1233: a motor; 1234: a liquid-gas separator;
13: a battery cooling subsystem; 131: a low temperature heat sink; 132: a battery line; 133: a battery water pump; 134: a gas-liquid separator; 135: a water-cooled intercooling radiator; 136: a water-cooled intercooler; 137: a heat-dissipating water pump; 138: a water-cooled condenser; 139: an expansion tank; 140: an air conditioning compressor; 141: an evaporator; 1421 and 1422: an electromagnetic valve; 1431 and 1432: an expansion valve;
14: a cooling device; 15: an intermediate structure.
Detailed Description
To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged where appropriate. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise.
It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, items, species, and/or groups thereof.
The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
With the increasingly appearing world energy problems, energy conservation and environmental protection become important directions for the development of the automobile industry. As a new generation of clean automobiles with low fuel consumption and low pollution, hybrid automobiles are gradually moving to the world stage and are receiving wide attention from the industry and experts and scholars. Thermal management systems for hybrid vehicles are the basis for ensuring hybrid vehicle comfort.
Currently, a relatively common hybrid vehicle thermal management system may include: the system comprises a passenger compartment air-conditioning refrigeration/engine heating subsystem, a battery chiller heat exchanger cooling subsystem, a battery low-temperature radiator cooling subsystem, a battery PTC heating subsystem, a motor low-temperature radiator cooling subsystem, a motor heat recovery subsystem, an engine air-air intercooler cooling subsystem and the like. Hardware devices such as a condenser, an air-air intercooler, a battery radiator, a motor radiator, an engine high-temperature radiator, and a cooling fan need to be disposed in the front cabin of the hybrid vehicle, corresponding to each subsystem in the thermal management system.
Hardware devices requiring heat dissipation are present in each subsystem in the thermal management system. If these heat dissipation devices are deployed independently from the respective subsystems in hardware deployment, there is a problem of insufficient front cabin space in the compact front cabin space of a hybrid vehicle.
In view of the above, the present application provides a thermal management system for a hybrid vehicle. This application with engine radiator and motor radiator integration on a heat dissipation core, very big saving arrange the space. This application still establishes ties same heat dissipation core with water-cooled condenser and water-cooled intercooler, has improved the radiating efficiency, sparingly arranges the space. Due to the arrangement of the two radiating cores, the arrangement space is greatly reduced, and the cost of the radiator is reduced. Meanwhile, with the updating of the power technology, the air intake system is upgraded from an air-to-air intercooling scheme to a water-to-water intercooling scheme. The condenser is upgraded from air cooling to water cooling. The condenser is changed into water cooling, the problem of high inlet air temperature of a water-cooled intercooler radiator can be solved, the supercharging inlet air temperature is reduced, and the oil consumption of the whole vehicle can be further reduced. In addition, the heat circulation system of the hybrid vehicle is combined, the heat management system is combined with the air conditioning system, the comfort level of the air conditioner is guaranteed, and the heat dissipation requirements of the motor, the engine and the battery are met.
The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic structural diagram illustrating a thermal management system of a hybrid vehicle according to an embodiment of the present application. As shown in fig. 1, a thermal management system 10 for a hybrid vehicle may include: an engine cooling subsystem 11, a motor cooling subsystem 12, a battery cooling subsystem 13, and a cooling device 14.
The engine cooling subsystem 11 includes a high-temperature radiator 112, the motor cooling subsystem 12 includes a medium-temperature radiator 122, and the battery cooling subsystem 13 includes a water-cooling inter-cooling radiator 135. The high-temperature radiator 112, the medium-temperature radiator 122, and the water-cooled inter-cooling radiator 135 may be collectively disposed. Meanwhile, a cooling device 14 can be provided to realize the centralized heat dissipation of the high-temperature radiator 112, the medium-temperature radiator 122 and the water-cooling inter-cooling radiator 135. The high-temperature radiator 112, the medium-temperature radiator 122 and the water-cooling inter-cooling radiator 135 are arranged in a centralized manner and radiate heat in a centralized manner, so that the cooling devices corresponding to the high-temperature radiator 112, the medium-temperature radiator 122 and the water-cooling inter-cooling radiator 135 are reduced to one, and the arrangement space is greatly saved through the spatial layout.
Wherein the cooling device 14 may be a cooling fan. The power of the cooling fan is more than 650W.
In one example, the high temperature radiator 112, the medium temperature radiator 122 and the water-cooled inter-cooling radiator 135 can be collectively arranged as shown in fig. 2.
The high temperature radiator 112 and the medium temperature radiator 122 may be disposed on a heat dissipation core. The radiator core includes an intermediate structure 15 thereon. The intermediate structure 15 may be used to separate a radiator core and connect two portions of the radiator core to the lines of the engine cooling subsystem 11 and the motor cooling subsystem 12, respectively. Wherein, the water-cooling inter-cooling radiator 135 is separately arranged on a radiating core body. The two radiating cores and the cooling device are horizontally arranged. The arrangement sequence of the radiator is from front to back, namely a water-cooling inter-cooling radiator 135, a high-temperature radiator 112, a medium-temperature radiator 122 and a cooling device. The high temperature radiator 112, the medium temperature radiator 122, the water-cooled inter-cooling radiator 135 and the cooling device are placed behind a front bumper of the hybrid vehicle. The water-cooled intercooler radiator 135 located at the front end is located closest to the front bumper of the hybrid vehicle and located at the outermost side. Wherein the cooling device 14 at the rear end is located innermost, away from the front fender of the hybrid vehicle. The water-cooled intercooler radiator 135 generates the least amount of heat, and therefore, the water-cooled intercooler radiator 135 is disposed farthest from the cooling device 14. The heat generated by the high-temperature heat sink 112 is the largest, and therefore, the high-temperature heat sink 112 is placed closest to the cooling device 14.
The thickness of the water-cooling intercooler radiator 135 may be 21 mm, and the thickness of the high-temperature radiator 112 and the medium-temperature radiator 122 may be 27 mm.
In another example, the high temperature radiator 112, the medium temperature radiator 122 and the water-cooled inter-cooling radiator 135 may be collectively arranged as shown in fig. 3.
Wherein, the water-cooling inter-cooling radiator 135, the middle-temperature radiator 122, the high-temperature radiator 112 and the cooling device 14 are horizontally arranged and are sequentially arranged behind the front bumper beam of the hybrid vehicle from front to back. Wherein, the water-cooling inter-cooling radiator 135 is positioned at the outermost side of the front cabin of the hybrid vehicle close to the front bumper beam. Wherein the cooling device 14 is located innermost, away from the front fender of the hybrid vehicle. The thickness of the water-cooling intercooler radiator 135 may be 21 mm, and the thickness of the high-temperature radiator 112 and the medium-temperature radiator 122 may be 27 mm.
According to the heat management system of the hybrid vehicle, the engine cooling subsystem comprises a high-temperature radiator, the motor cooling subsystem comprises a medium-temperature radiator, and the battery cooling subsystem comprises a water-cooling and inter-cooling radiator. The high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator can be arranged in a centralized manner. Meanwhile, a cooling device can be arranged to realize the centralized heat dissipation of the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator. In the application, the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator are arranged in a concentrated mode, so that the arrangement space is saved and the cost is saved on the basis of ensuring the heat dissipation effect.
Fig. 4 shows a schematic structural diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application. Based on the embodiment shown in fig. 1 to 3, as shown in fig. 4, the engine cooling subsystem 11 in the thermal management system 10 of the hybrid vehicle may include: a main electric water pump 111, a high temperature radiator 112, an engine pipeline 113 and a thermostat 114.
The engine cooling subsystem 11 may be connected in series with the high-temperature radiator 112, the engine pipeline 113, the thermostat 114, and the main electronic water pump 111 through pipelines to form a first cooling loop, so as to cool the engine. The first cooling circuit has a coolant flowing through its piping. The cooling fluid may be water. The engine cooling subsystem achieves engine cooling in a water cooling mode.
The main electronic water pump 111 is used for driving the coolant in the pipeline of the engine cooling subsystem 11 to flow according to the first cooling circuit. The main electronic water pump 111 may be as shown in fig. 1, for driving the coolant in the pipeline to flow from the left side of the main electronic water pump 111 to the right side of the main electronic water pump 111. The main electronic water pump 111 is connected to an engine pipe 112 through a pipe. The coolant in the pipeline can flow to the engine pipeline 113 under the driving of the main electronic water pump 111.
The engine may include, among other things, an engine block and an engine head. An engine line 113 is provided to the engine block and the engine head. In the engine pipe 113, the coolant first passes through the engine pipe 113 on the engine cylinder, and the heat on the engine cylinder is taken away in a heat exchange manner. Thereafter, the coolant flows through the engine head along the engine conduit 113 and carries away heat from the engine head by way of heat exchange.
The engine pipe 113 is connected to the thermostat 114 through a pipe. The thermostat 114 is used to determine the circuit of the engine cooling subsystem 11 based on the temperature of the coolant in the circuit. When the thermostat 114 determines that the temperature of the coolant in the pipe is equal to or greater than a first threshold value, the thermostat 114 is connected to the high temperature radiator 112. The high temperature radiator 112 can radiate the cooling liquid therein through the cooling device 14 when the cooling liquid flows through the heat radiating core of the high temperature radiator. When the thermostat 114 determines that the temperature of the coolant in the pipe is less than the first threshold value, the thermostat 114 is connected to the main electronic water pump 111. The coolant will continue to circulate in the first cooling circuit and take away heat from the engine by means of heat exchange.
Wherein the first threshold is based on an empirically determined value. The first threshold is fixedly set in the thermostat 114. When the temperature of the cooling liquid is greater than or equal to the first threshold, the temperature of the cooling liquid is high, and heat dissipation of the cooling liquid is required. Otherwise, the coolant cannot continue to dissipate heat from the engine through heat exchange. When the temperature of the coolant is less than the first threshold, the temperature of the coolant is at a normal level. At this time, the engine generates less heat. Or, at this time, the temperature of the cooling liquid is far lower than that of the engine, and the heat of the engine can be continuously absorbed through a heat exchange mode.
An expansion tank 119 may also be included in the engine cooling subsystem 11. The expansion tank 119 is arranged to spill excess coolant from the pipeline in the event of excess coolant in the pipeline and to store it in the expansion tank 119. The expansion tank 119 is also used to replenish the line with coolant in the event of insufficient coolant in the line. Since the cooling fluid in the pipeline undergoes both heating and cooling during the circulation, the problems of volume expansion of the cooling fluid after heating and volume reduction of the cooling fluid after cooling may occur during the circulation.
In one example, the engine cooling subsystem 11 may further include: air conditioner heating core 115, ooff valve 116, exhaust gas recirculation subassembly 117.
The engine cooling subsystem 11 may form a second cooling loop by connecting the engine pipeline 113, the main electronic water pump 111, the on-off valve 116, the exhaust gas recirculation assembly 117, and the air-conditioning heater core 115 in series. In the second cooling circuit, the main electronic water pump 111 is used for driving the coolant in the pipeline of the engine cooling subsystem 11 to flow to the engine pipeline 113 according to the second cooling circuit. In this second cooling circuit, the engine pipe 113 is connected to an exhaust gas recirculation unit 117 via an on-off valve 116, and the exhaust gas recirculation unit 117 is connected to the air-conditioning heater core 115 and further connected to the thermostat 114 via the air-conditioning heater core 115.
The on-off valve 116 is opened when the air-conditioning hot air in the passenger compartment is turned on. When the on-off valve 116 is opened, the second cooling circuit is communicated. At this time, in the engine cooling subsystem 11, the first cooling circuit and the second cooling circuit function simultaneously. In the second cooling circuit, the coolant that has absorbed the heat of the engine flows through the exhaust gas recirculation assembly 117 and enters the air conditioning core 115.
Wherein the gas in the exhaust gas recirculation assembly 117 is combusted exhaust gas. The exhaust gas is a high temperature gas. When the coolant flows through the exhaust gas recirculation assembly 117, the coolant absorbs heat from the exhaust gas through heat exchange, thereby achieving secondary heating. Meanwhile, after the cooling liquid absorbs heat in the exhaust gas, the exhaust gas can be converted into liquid or low-temperature gas through the exhaust gas recirculation assembly 117, so that the exhaust gas can be recycled.
After the coolant heated secondarily in the exhaust gas recirculation unit 117 enters the air-conditioning heater core 115, heat exchange is performed by the air-conditioning heater core 115, and heat in the coolant is exchanged into the air. The air is output to the passenger compartment by the air conditioner, and heating in the passenger compartment is realized. After the cooling liquid in the pipeline dissipates heat through the air conditioner warm air core 115, the cooling liquid is connected to the main electronic water pump 111 along the pipeline. The coolant will continue to circulate in the second cooling circuit and take away heat from the engine by means of heat exchange.
Since part of the lines of the second cooling circuit coincides with part of the lines of the first cooling circuit. Thus, when the on-off valve 116 is opened, the coolant in the engine cooling subsystem 11 will be distributed to the first cooling circuit and the second cooling circuit after passing through the engine line 113.
In yet another example, the engine cooling subsystem 11 may further include: a turbocharger 118.
The engine cooling subsystem 11 may be connected in series with the main electronic water pump 111 and the turbocharger 118 through a pipeline to form a third cooling loop. The third cooling circuit is used to achieve a temperature reduction of the turbocharger 118. The third cooling circuit bypasses the coolant to the turbocharger 118 before the coolant enters the engine line 113.
The application provides a thermal management system of a hybrid vehicle, which comprises an engine cooling subsystem. The engine cooling subsystem includes a first cooling circuit, a second cooling circuit, and a third cooling circuit. The first cooling loop is formed by connecting a high-temperature radiator, an engine pipeline, a thermostat and a main electronic water pump in series through pipelines. The first cooling circuit is used for realizing heat dissipation of the engine through a high-temperature radiator. The second cooling loop is formed by connecting an engine pipeline, a main electronic water pump, a switch valve, a waste gas recirculation assembly and an air-conditioning warm air core body in series through pipelines. The second cooling loop is used for being opened when the air-conditioning warm air of the passenger compartment is started, and heating of the passenger compartment and heat dissipation of the engine and the exhaust gas are achieved by using heat of the engine and heat of the exhaust gas. Wherein the third cooling circuit is used for realizing the temperature reduction of the turbocharger. In this application, through above-mentioned cooling circuit, realize engine, waste gas and turbo charger's water-cooling. Meanwhile, the heat in the engine and the waste gas can be recycled when the passenger compartment is heated.
Fig. 5 is a schematic structural diagram illustrating a thermal management system of a hybrid vehicle according to an embodiment of the present application. Based on the embodiment shown in fig. 1 to 4, as shown in fig. 5, the motor cooling subsystem 12 in the thermal management system 10 of the hybrid vehicle includes: an electric drive water pump 121, a medium temperature radiator 122 and a motor pipeline 123.
The motor cooling subsystem 12 may form a fourth cooling loop by connecting the electric drive water pump 121, the middle temperature radiator 122, and the motor pipeline 123 in series. In the fourth cooling loop, the electric drive water pump 121 is used to drive the cooling fluid, which absorbs heat in the motor through the motor pipeline 123, to flow to the medium temperature radiator 122 for heat dissipation.
The motor pipeline 123 may include a dc converter 1231, a motor controller 1232, a motor 1233, and a liquid-gas separator 1234. The dc converter 1231, the motor controller 1232, and the motor 1233 constitute a motor of the hybrid vehicle. The motor line 123 is composed of lines passing through the dc converter 1231, the motor controller 1232, and the motor 1233. The cooling fluid in the motor circuit can absorb heat generated by the dc converter 1231, the motor controller 1232, and the motor 1233 when the cooling fluid flows through the dc converter 1231, the motor controller 1232, and the motor 1233 during use. The liquid-gas separator 1234 is used to discharge gas from the pipeline when the coolant in the pipeline is heated and vaporized. The accumulator 1234 is connected to the expansion tank 119 for taking coolant from the expansion tank 119 to replenish the fourth cooling circuit when there is insufficient coolant in the circuit.
The application provides a thermal management system of a hybrid vehicle, which comprises an electric machine cooling subsystem. The motor cooling subsystem can be connected with an electric drive water pump, a medium temperature radiator and a motor pipeline in series through a fourth cooling loop. In the fourth cooling loop, the electric drive water pump is used for driving cooling liquid which absorbs heat in the motor through a motor pipeline to flow to the medium-temperature radiator to realize heat dissipation. In this application, through using fourth cooling circuit, realize the water-cooling of motor.
Fig. 6 shows a schematic structural diagram of a thermal management system of a hybrid vehicle according to an embodiment of the present application. On the basis of the embodiment shown in fig. 1 to 5, as shown in fig. 6, the battery cooling subsystem 13 in the thermal management system 10 of the hybrid vehicle includes: low temperature radiator 131, the first loop and the second loop. Wherein the first circuit comprises a battery line 132, a battery water pump 133 and a gas-liquid separator 134. Wherein the second loop comprises a water-cooled intercooler radiator 135, a water-cooled intercooler 136 and a heat-dissipating water pump 137.
Wherein the first circuit and the second circuit may be connected by a low temperature radiator 131. That is, the pipe line of the first circuit passes through the low-temperature radiator 131. Meanwhile, the pipe of the second circuit passes through the low temperature radiator 131. The first circuit and the second circuit are not in communication. After the coolant in the pipe of the first circuit absorbs the heat of the battery, the heat is exchanged to the coolant in the pipe of the second circuit in the low-temperature radiator 131. After the cooling liquid in the first circuit is cooled by the low-temperature radiator 131, the cooling liquid will continue to circulate in the first circuit and take away the heat in the battery by means of heat exchange.
In the first circuit, a battery pipeline 132, a gas-liquid separator 134 and a battery water pump 133 are connected in series to form a circuit. Wherein a battery water pump 133 is used to drive the coolant to flow in the first circuit. Wherein the battery conduit 132 is located at the battery surface. When the coolant flows through the battery line 132, the coolant can absorb heat generated from the battery through heat exchange. Wherein the gas-liquid separator 134 is connected to an expansion tank 139. The expansion tank 139 may be the same expansion tank as the expansion tank 139 in fig. 4. Alternatively, the expansion tank 139 may be two expansion tanks having the same function as the expansion tank 139 in FIG. 4. The gas-liquid separator 134 can discharge the gas in the pipe line when the coolant absorbs heat in the battery and is vaporized. At the same time, the gas-liquid separator 134 may also take cooling liquid from the expansion tank 139 to supplement the first circuit when the cooling liquid content in the lines of the first circuit is insufficient.
In the second loop, a heat-dissipating water pump 137, a water-cooled intercooler 136 and a water-cooled intercooler radiator 135 are connected in series to form a loop. Wherein a heat-dissipating water pump 137 is used to drive the coolant to flow in the second circuit. Wherein, the water-cooling inter-cooling radiator 135 is used for realizing the heat dissipation of the cooling liquid in the second loop. The second circuit may also be connected to an expansion tank 139. When the coolant in this second circuit is superheated, excess coolant may overflow into the expansion tank 139. When the second circuit is not sufficiently charged with cooling liquid, cooling liquid is taken from the expansion tank 139 to be replenished in the second circuit.
In one example, the battery cooling subsystem 13 further includes: a third loop and a water cooled condenser 138. The third circuit includes an air conditioner compressor 140, an evaporator 141, solenoid valves 1421 and 1242, and expansion valves 1431 and 1432.
Wherein the first circuit and the third circuit are connected by a low temperature radiator 131. That is, the pipe line of the first circuit passes through the low-temperature radiator 131. Meanwhile, the pipe of the third circuit passes through the low temperature radiator 131. The first circuit and the third circuit are not in communication. After the coolant in the first circuit absorbs the heat of the battery, the heat is exchanged to the refrigerant in the third circuit in the low-temperature radiator 131.
Wherein the second circuit and the third circuit are connected by a water cooled condenser 138. That is, the piping of the third circuit passes through this water-cooled condenser 138. At the same time, the piping of the second circuit passes through the water-cooled condenser 138. The first circuit and the third circuit are not in communication. When the air conditioner compressor 140 in the third loop converts the refrigerant in the third loop into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant enters the water-cooled condenser 138. The water cooled condenser 138 transfers heat from the refrigerant to the coolant in the second loop.
In the third circuit, after the high-temperature and high-pressure gaseous refrigerant passes through the water-cooled condenser 138, the heat in the refrigerant is transferred to the coolant in the second circuit. The refrigerant in the third loop is liquefied into a liquid refrigerant at normal temperature and high pressure. After passing through the water-cooled condenser 138, the refrigerant in the third circuit passes through the branched pipes and flows to the low-temperature radiator 131 and the evaporator 141, respectively. A solenoid valve 1422 and an expansion valve 1432 are provided in the branched pipe before reaching the low temperature radiator 131. A solenoid valve 1422 and an expansion valve 1432 are also provided in the branched line before reaching the evaporator 141. The liquid refrigerant at normal temperature and high pressure passes through the low temperature radiator 131 to obtain the heat of the coolant in the pipeline of the first loop. After passing through the low-temperature radiator 131, the normal-temperature and high-pressure liquid refrigerant absorbs heat and is converted into a low-temperature and low-pressure gaseous refrigerant. In the other branch path, the liquid refrigerant at normal temperature and high pressure is also converted into a gaseous refrigerant at low temperature and low pressure after passing through the evaporator 141. Thereafter, the low-temperature and low-pressure gaseous refrigerant is converted into a high-temperature and high-pressure gaseous refrigerant by the air conditioner compressor 140, and the air conditioner compressor 140 cools the passenger compartment.
The application provides a thermal management system of a hybrid vehicle, which comprises a battery cooling subsystem. The power generation pool cooling subsystem includes a first circuit and a second circuit. Wherein the coolant in the first loop may absorb heat from the battery. The cooling fluid in the first loop may be heat exchanged via a low temperature heat sink. The cooling fluid in the second loop may absorb this heat. In this application, through the heat exchange in first return circuit and the second return circuit, realize the heat dissipation of battery. This application can also realize the heat exchange of first return circuit and third return circuit, the heat exchange of third return circuit and second return circuit through the use of third return circuit to the realization guarantees the refrigeration effect in passenger cabin on the radiating basis of assurance battery.
The present application also provides a hybrid vehicle including a thermal management system for a hybrid vehicle as shown in the embodiments of fig. 1-6. The high-temperature radiator, the medium-temperature radiator, the water-cooling inter-cooling radiator and the cooling equipment which are arranged in a centralized manner are positioned behind a front bumper anti-collision beam of the hybrid vehicle. The hybrid vehicle provided in the embodiment of the present application may implement the method embodiment, and for specific implementation principles and technical effects, reference may be made to the method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: it is also possible to modify the solutions described in the previous embodiments or to substitute some or all of them with equivalents. And the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A thermal management system for a hybrid vehicle, the system comprising: the system comprises an engine cooling subsystem, a motor cooling subsystem, a battery cooling subsystem and a cooling device;
the high-temperature radiator of the engine cooling subsystem, the medium-temperature radiator of the motor cooling subsystem and the water-cooling inter-cooling radiator of the battery cooling subsystem are arranged in a centralized manner;
the cooling device is arranged behind the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator and is used for assisting the high-temperature radiator, the medium-temperature radiator and the water-cooling inter-cooling radiator in heat dissipation.
2. The system of claim 1, wherein the high temperature radiator of the engine cooling subsystem, the medium temperature radiator of the motor cooling subsystem, and the water-cooled inter-cooling radiator of the battery cooling subsystem are collectively positioned, comprising:
the high-temperature radiator and the medium-temperature radiator are horizontally arranged in parallel, and are separated by an intermediate structure;
the high-temperature radiator and the medium-temperature radiator which are arranged in parallel are positioned between the water-cooling inter-cooling radiator and the cooling device; the water-cooling inter-cooling radiator, the high-temperature radiator and the medium-temperature radiator which are arranged in parallel and the cooling device are horizontally arranged from front to back in sequence.
3. The system of claim 1, wherein the high temperature radiator of the engine cooling subsystem, the medium temperature radiator of the motor cooling subsystem, and the water-cooled inter-cooling radiator of the battery cooling subsystem are collectively positioned, comprising:
the water-cooling inter-cooling radiator, the medium-temperature radiator, the high-temperature radiator and the cooling device are horizontally arranged from front to back in sequence.
4. The system of any of claims 1-3, wherein the engine cooling subsystem comprises: the system comprises a high-temperature radiator, an engine pipeline, a thermostat and a main electronic water pump;
the main electronic water pump is connected with the engine pipeline through a pipeline, cooling liquid in the pipeline presses the cooling liquid to the engine pipeline through the main electronic water pump, and the engine pipeline is located on the surfaces of a cylinder body and a cylinder cover of the engine;
the engine pipeline is connected with the thermostat through a pipeline, and when the thermostat judges that the temperature of the cooling liquid in the pipeline is greater than or equal to a first threshold value, the thermostat is connected with the high-temperature radiator through the pipeline; otherwise, the thermostat is connected with the main electronic water pump through the pipeline.
5. The system of claim 4, wherein the engine cooling subsystem further comprises: the system comprises a switch valve, a waste gas recirculation assembly and an air conditioner warm air core body;
when the air conditioner warm air of the passenger compartment is started, the switch valve is opened, the engine pipeline is connected with the exhaust gas recirculation assembly through a pipeline, and the cooling liquid in the pipeline is heated by the exhaust gas recirculation assembly;
the exhaust gas recirculation assembly is connected with the air-conditioning heater core body through the pipeline, and the cooling liquid in the pipeline exchanges heat through the air-conditioning heater core body to transfer heat in the cooling liquid into the passenger compartment;
the air-conditioning warm air core body is connected with the main electronic water pump through a pipeline.
6. The system of any one of claims 1-3, wherein the motor cooling subsystem comprises: the system comprises a motor pipeline, an electric drive water pump and a medium temperature radiator;
the motor pipeline, the electric drive water pump and the medium temperature radiator are sequentially connected through a pipeline to form a loop; the electrically-driven water pump is used for driving the cooling liquid in the pipeline to flow in the loop.
7. The system of any one of claims 1-3, wherein the battery cooling subsystem comprises: a first loop, a second loop and a low temperature radiator;
the first circuit and the second circuit are connected through the low-temperature radiator, and the low-temperature radiator is used for exchanging heat in the first circuit to the second circuit;
the first loop comprises a battery pipeline, a battery water pump and a gas-liquid separator which are sequentially connected through pipelines to form a loop; the battery water pump is used for driving the cooling liquid in the first circuit to flow in the first circuit;
the second loop comprises a water-cooling inter-cooling radiator, a water-cooling inter-cooling radiator and a heat dissipation water pump, and the heat dissipation water pump, the water-cooling inter-cooling radiator and the water-cooling inter-cooling radiator are sequentially connected through pipelines to form a loop; the heat dissipation water pump is used for driving the cooling liquid in the second loop to flow in the second loop.
8. The system of claim 7, wherein the battery cooling subsystem cooling system further comprises: a third loop and a water cooled condenser;
the first circuit and the third circuit are connected through the low-temperature radiator, and the low-temperature radiator is used for exchanging heat in the first circuit to the third circuit; the second loop and the third loop are connected through the water-cooled condenser, and the water-cooled condenser is used for exchanging heat in the second loop into the third loop;
the third loop comprises an air conditioner compressor, an evaporator, two electromagnetic valves and two expansion valves; the air conditioner compressor is connected with the water-cooled condenser through a pipeline; the water-cooled condenser is connected with the low-temperature radiator through a pipeline, and the electromagnetic valve and the expansion valve are arranged on the pipeline; the water-cooled condenser is connected with the evaporator through a pipeline, and the electromagnetic valve and the expansion valve are arranged on the pipeline; the low-temperature radiator and the evaporator are respectively connected with the air-conditioning compressor through pipelines.
9. Hybrid vehicle, characterized in that it comprises a thermal management system of a hybrid vehicle according to any one of claims 1 to 8.
10. The hybrid vehicle of claim 9, wherein the centrally-located high-temperature radiator, medium-temperature radiator, water-cooled intercooling radiator, and cooling apparatus are located behind a front bumper beam of the hybrid vehicle.
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