CN109435658B - Thermal management system of vehicle, control method of thermal management system and vehicle - Google Patents
Thermal management system of vehicle, control method of thermal management system and vehicle Download PDFInfo
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- CN109435658B CN109435658B CN201811103083.1A CN201811103083A CN109435658B CN 109435658 B CN109435658 B CN 109435658B CN 201811103083 A CN201811103083 A CN 201811103083A CN 109435658 B CN109435658 B CN 109435658B
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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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
- 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
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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
- 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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- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a vehicle thermal management system, a control method thereof and a vehicle, wherein the thermal management system comprises: the motor is communicated with the engine to form circulation, a first pipeline is connected between the first flow regulating valve and the second flow regulating valve, a second pipeline is connected between the second flow regulating valve and the third flow regulating valve, and a third pipeline is connected between the third flow regulating valve and the engine. Therefore, the flow of the cooling liquid flowing to the battery, the motor controller and the motor can be effectively controlled, fine control of the flow of the cooling liquid can be achieved, the battery, the motor controller and the motor can be maintained in respective working temperature intervals, the best working state can be kept, and the service life of each component can be prolonged.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a thermal management system of a vehicle, a control method of the thermal management system and the vehicle.
Background
With the rapid development of the automobile industry, higher requirements are put forward on energy conservation and emission reduction of automobiles, and a hybrid power system with both dynamic property and economical efficiency becomes the focus of main industrial research, becomes one of mainstream branches of new energy power system development, and has a great development space.
At present, a cooling system of a hybrid power system generally adopts a mode of respectively controlling modules, and the difference of products puts higher requirements on system integration.
The charging and discharging efficiency of the battery is greatly influenced by temperature, when the temperature is too low, pure electric starting is difficult, electric energy is consumed for heating the battery through electric heating, and a large amount of electric energy is consumed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a thermal management system for a vehicle, which can simultaneously manage the temperatures of a battery, a motor controller and a motor, so that each component can operate in a respective operating temperature range, the operating efficiency can be improved, and the energy consumption of the battery can be reduced.
The invention further provides a control method of the thermal management system.
The invention further provides a vehicle.
The thermal management system of a vehicle according to the present invention includes: an engine, a radiator, a first flow regulating valve, a battery, a second flow regulating valve, a motor controller, a third flow regulating valve and a motor which are connected in series, wherein the motor is communicated with the engine to form a cycle, wherein a first pipeline is connected between the first flow regulating valve and the second flow regulating valve, so that the first flow rate adjustment valve adjusts the flow rate of the coolant flowing to the battery and the first pipe, a second pipe is connected between the second flow rate adjustment valve and the third flow rate adjustment valve, so that the second flow rate regulating valve regulates the flow rate of the coolant flowing to the motor controller and the second pipeline, and a third pipeline is connected between the third flow rate regulating valve and the engine, so that the second flow regulating valve regulates the flow of the coolant to the motor and the third line.
Therefore, by adopting the first flow regulating valve, the second flow regulating valve and the third flow regulating valve, the flow of the cooling liquid flowing to the battery, the motor controller and the motor can be effectively controlled, so that the refined control of the flow of the cooling liquid can be achieved, the battery, the motor controller and the motor can be maintained in respective working temperature intervals, the best working state can be kept, the service lives of all the components can be prolonged, and the heat management system can simultaneously control a plurality of components, is simple to control and consumes less energy.
In some examples of the invention, the first flow regulating valve includes two first outlets, the two first outlets being connected to the battery and the first pipe, respectively; the second flow regulating valve comprises two second outlets which are respectively connected with the motor controller and the second pipeline; the third flow regulating valve comprises two third outlets, and the two third outlets are respectively connected with the motor and the third pipeline.
In some examples of the invention, the outlet of the battery is connected to the first pipe, the outlet of the motor controller is connected to the second pipe, and the outlet of the motor is connected to the third pipe.
In some examples of the present invention, the liquid inlet pipe of the battery, the liquid inlet pipe of the motor controller, and the liquid inlet pipe of the motor are provided with check valves for one-way inflow.
In some examples of the invention, the first flow regulating valve, the second flow regulating valve and the third flow regulating valve are all thermostat or three-way electronic valves with adjustable valves.
In some examples of the invention, the thermal management system further comprises: a fan disposed at the heat sink.
In some examples of the invention, the thermal management system further comprises: and the battery, the motor controller, the motor, the first flow regulating valve, the second flow regulating valve, the third flow regulating valve and the fan are in signal connection with the vehicle control unit.
The control method of the thermal management system of the vehicle according to the present invention includes the steps of: s1, acquiring the temperatures of the battery, the motor controller and the motor, comparing the acquired temperatures with respective working temperature intervals, and judging the current heat load state; and S2, when the temperature of any one of the battery, the motor controller and the motor is not in the working temperature interval, adjusting at least one of the first flow regulating valve, the second flow regulating valve and the third flow regulating valve, and changing the supply amount of the cooling liquid so as to return the temperature to the working temperature interval.
In some examples of the invention, the thermal management system comprises: a fan; in step S1, determining that the thermal management system is in a heating state; in step S2, when the temperature of the battery is lower than the corresponding lower limit of the operating temperature range and is also lower than 15 ℃, the opening degree of the first flow rate adjustment valve toward the battery is adjusted to the maximum, and the fan is turned off.
In some examples of the invention, further comprising: and S3, after the temperature of the battery is increased to be higher than 20 ℃, adjusting the opening degree of the first flow direction adjusting valve towards the battery, and opening the fan, wherein the temperature of the battery is maintained in an operating temperature interval.
In some examples of the invention, the thermal management system comprises: a fan; in step S1, determining that the thermal management system is in a cooling state; in step S2, when the temperature of the battery is higher than the upper limit of the operating temperature interval, the opening degree of the first flow rate adjustment valve toward the battery is increased, and after the temperature of the battery has not returned to the operating temperature interval within a predetermined time, the rotation speed of the fan is increased to return the battery to the operating temperature interval; when the temperature of the motor controller is higher than the upper limit of the working temperature interval, increasing the opening of the second flow regulating valve towards the motor controller, and increasing the rotating speed of the fan after the temperature of the motor controller does not return to the working temperature interval within preset time to enable the motor controller to return to the working temperature interval; when the temperature of the motor is higher than the upper limit of the working temperature interval, increasing the opening degree of the third flow regulating valve towards the motor, and increasing the rotating speed of the fan after the temperature of the motor does not return to the working temperature interval within preset time to return the motor to the working temperature interval; when the temperature of the battery is lower than the corresponding lower limit of the working temperature interval, reducing the rotating speed of the fan, and if one temperature of the motor controller and the motor is higher than the corresponding upper limit of the working temperature interval, reducing the opening degree of the first flow regulating valve towards the motor; when the temperature of the motor controller is lower than the lower limit of the corresponding working temperature interval, reducing the rotating speed of the fan, and if the temperatures of the motor controller and the motor are higher than the upper limit of the corresponding working temperature interval, reducing the opening degree of the second flow regulating valve towards the motor; and when the temperature of the motor is lower than the lower limit of the corresponding working temperature interval, reducing the rotating speed of the fan, and if the three temperatures of the motor controller and the motor are higher than the upper limit of the corresponding working temperature interval, reducing the opening degree of the third flow regulating valve towards the motor.
The vehicle comprises the thermal management system of the vehicle.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a thermal management system of a vehicle according to an embodiment of the invention.
FIG. 2 is a schematic step diagram of a control method of a thermal management system of a vehicle according to an embodiment of the invention.
Reference numerals:
a thermal management system 100;
an engine 1; a radiator 2; a first flow rate regulating valve 3; a battery 4; a second flow rate adjustment valve 5; a motor controller 6; a third flow rate adjustment valve 7; a motor 8; a first pipeline 9; a second pipeline 10; a third pipeline 11; a water pump 12; a water tank 13; a fan 14; and a vehicle control unit 15.
Detailed Description
Referring to fig. 1, a thermal management system 100 of a vehicle according to an embodiment of the present invention is described, and the thermal management system 100 may be applied to a hybrid system of the vehicle.
As shown in fig. 1, a thermal management system 100 of a vehicle according to an embodiment of the present invention includes: the engine 1, the radiator 2, the first flow regulating valve 3, the battery 4, the second flow regulating valve 5, the motor controller 6, the third flow regulating valve 7 and the motor 8 are connected in series, and the motor 8 is communicated with the engine 1 to form a cycle. That is, the coolant passing through the motor 8 flows into the engine 1 again, so that a circulation loop can be formed, and when the thermal management system 100 operates, the coolant passes through various components, and the coolant in the circulation loop can continuously improve the operating temperatures of the engine 1, the battery 4, the motor controller 6, and the motor 8. The engine 1 may be a gas engine 1. It should be noted that the two adjacent components may be connected by a pipeline. The positions of the first flow regulating valve 3, the second flow regulating valve 5 and the third flow regulating valve 7 may be changed, for example, the second flow regulating valve 5 and the motor controller 6 may be located upstream of the first flow regulating valve 3 and the battery 4, and for example, the third flow regulating valve 7 and the motor 8 may be located upstream of the second flow regulating valve 5 and the motor controller 6, so that the change of the positions does not affect the change of the regulating function, and the plurality of components may be connected in series.
Wherein, the first pipeline 9 is connected between the first flow regulating valve 3 and the second flow regulating valve 5, so that the first flow regulating valve 3 regulates the flow of the cooling liquid flowing to the battery 4 and the first pipeline 9, that is, the first flow regulating valve 3 not only supplies the cooling liquid towards the battery 4, but also supplies the cooling liquid towards the first pipeline 9, it can be understood that the cooling liquid supplied into the first pipeline 9 does not participate in the heat exchange of the battery 4, so that the first flow regulating valve 3 can improve the working temperature of the battery 4 by regulating the flow of the cooling liquid flowing to the battery 4 and the flow of the cooling liquid flowing to the first pipeline 9, thereby making the working temperature of the battery 4 within a reasonable working temperature interval. A cooling pipeline or a cooling disc is reserved inside the battery 4, the cooling pipeline or the cooling disc can be attached to the surface of the battery core of the battery 4, so that the heat exchange area can be increased, and the heat exchange efficiency can be improved. The minimum opening degree of the first flow rate adjustment valve 3 is larger than 0, and may be 20% of the total flow rate, for example.
A second pipeline 10 is connected between the second flow regulating valve 5 and the third flow regulating valve 7, so that the second flow regulating valve 5 regulates the flow of the cooling liquid flowing to the motor controller 6 and the second pipeline 10, that is, the second flow regulating valve 5 not only supplies the cooling liquid to the motor controller 6, but also supplies the cooling liquid to the second pipeline 10, it can be understood that the cooling liquid supplied to the second pipeline 10 does not participate in the heat exchange of the motor controller 6, so that the second flow regulating valve 5 can improve the working temperature of the motor controller 6 by regulating the flow of the cooling liquid flowing to the motor controller 6 and the flow of the cooling liquid flowing to the second pipeline 10, and the working temperature of the motor controller 6 can be within a reasonable working temperature interval. A cooling pipeline or a cooling disc is reserved inside the motor controller 6. The minimum opening degree of the second flow rate adjustment valve 5 is larger than 0, and may be 20% of the total flow rate, for example.
A third pipeline 11 is connected between the third flow rate adjustment valve 7 and the engine 1, so that the second flow rate adjustment valve 5 adjusts the flow rate of the coolant flowing to the motor 8 and the third pipeline 11. That is, the third flow rate adjustment valve 7 supplies the cooling liquid not only toward the motor 8 but also toward the third pipe 11, and it can be understood that the cooling liquid supplied into the third pipe 11 does not participate in the heat exchange of the motor 8, so that the third flow rate adjustment valve 7 can improve the operating temperature of the motor 8 by adjusting the flow rate of the cooling liquid flowing to the motor 8 and the flow rate of the cooling liquid flowing to the third pipe 11, thereby making it possible to make the operating temperature of the motor 8 within a reasonable operating temperature range. The minimum opening degree of the third flow rate adjustment valve 7 is larger than 0, and may be 20% of the total flow rate, for example.
Therefore, by adopting the first flow regulating valve 3, the second flow regulating valve 5 and the third flow regulating valve 7, the flow of the cooling liquid flowing to the battery 4, the motor controller 6 and the motor 8 can be effectively controlled, so that the refined control of the flow of the cooling liquid can be achieved, the battery 4, the motor controller 6 and the motor 8 can be maintained in respective working temperature intervals, the optimal working state can be kept, the service lives of all components can be prolonged, and the thermal management system 100 can simultaneously control a plurality of components, and is simple to control and low in energy consumption.
Alternatively, as shown in fig. 1, the first flow rate adjustment valve 3 includes two first outlets, which are connected to the battery 4 and the first pipe 9, respectively. Two first outlets may be provided at different sidewalls of the first flow control valve 3, for example, the first flow control valve 3 has a first inlet, a first outlet opposite to the first inlet may be used for connecting the first pipeline 9, and another first outlet may be used for connecting the battery 4. So configured, first conduit 9 and battery 4 are prevented from interfering with one another, making thermal management system 100 reasonably orderly in layout.
The second flow control valve 5 includes two second outlets, and the two second outlets are respectively connected to the motor controller 6 and the second pipeline 10. Two second outlets may be provided at different side walls of the second flow regulating valve 5, for example, the second flow regulating valve 5 has one second inlet, a second outlet arranged opposite to the second inlet may be used for connecting the second pipeline 10, and the other second outlet may be used for connecting the motor controller 6. So configured, the second pipeline 10 and the motor controller 6 are prevented from interfering with each other, and the thermal management system 100 can be arranged reasonably and orderly.
The third flow regulating valve 7 comprises two third outlets which are respectively connected with the motor 8 and the third pipeline 11. Two third outlets may be provided at different side walls of the third flow rate adjustment valve 7, for example, the third flow rate adjustment valve 7 has three third inlets, a third outlet provided opposite to the third inlet may be used for connecting the third pipeline 11, and the other three third outlets may be used for connecting the motor 8. So configured, the third pipeline 11 and the motor 8 can be prevented from interfering with each other, and the thermal management system 100 can be arranged reasonably and orderly.
The outlet of the battery 4 is connected to the first pipe 9, so that the outlet of the first pipe 9 is connected to the second inlet of the second flow regulating valve 5, thereby omitting an inlet and making the pipe layout of the thermal management system 100 reasonable.
The outlet of the motor controller 6 is connected to the second pipeline 10, so that the outlet of the second pipeline 10 is connected to the third inlet of the third flow regulating valve 7, thereby omitting one inlet and making the pipeline of the thermal management system 100 be arranged reasonably.
The outlet of the motor 8 is connected to the third pipe 11, so that the outlet of the third pipe 11 is connected to the inlet of the engine 1, thereby omitting an inlet and making the pipe arrangement of the thermal management system 100 reasonable.
As shown in fig. 1, the liquid inlet pipe of the battery 4, the liquid inlet pipe of the motor controller 6, and the liquid inlet pipe of the motor 8 are all provided with one-way valves for one-way inflow. The check valve prevents the coolant from flowing in the reverse direction, so that the coolant can be forced to flow in a predetermined direction, and the operational reliability of the thermal management system 100 can be ensured. It should be noted that a liquid inlet pipe is connected between the battery 4 and the first flow regulating valve 3, and a liquid outlet pipe is connected between the battery 4 and the first pipeline 9; a liquid inlet pipe is connected between the motor controller 6 and the second flow regulating valve 5, and a liquid outlet pipe is connected between the motor controller 6 and the second pipeline 10; a liquid inlet pipe is connected between the motor 8 and the third flow regulating valve 7, and a liquid outlet pipe is connected between the motor 8 and the third pipeline 11. The liquid inlet pipe and the liquid outlet pipe may be of the same type, and the first pipe 9, the second pipe 10 and the third pipe 11 may also be of the same type, which may further reduce the complexity of the heat management system 100.
The type of the flow control valve is not limited, and for example, the first flow control valve 3, the second flow control valve 5, and the third flow control valve 7 are all thermostats or three-way electronic valves with adjustable valves. And a reasonable valve is selected, so that the thermal management system 100 is accurately controlled and works reliably.
According to an embodiment of the present invention, as shown in fig. 1, the thermal management system 100 further includes: a fan 14, the fan 14 being provided at the heat sink 2. The fan 14 may be an electronic fan 14, and the rotation speed of the fan 14 may be changed, so as to improve the heat dissipation performance of the heat sink 2, for example, when the heat dissipation efficiency needs to be high, the rotation speed of the fan 14 is increased; for another example, if the heat dissipation efficiency is required to be slightly low, the rotation speed of the fan 14 is reduced.
Wherein, thermal management system 100 further includes: the vehicle control unit 15, the battery 4, the motor controller 6, the motor 8, the first flow regulating valve 3, the second flow regulating valve 5, the third flow regulating valve 7 and the fan 14 are in signal connection with the vehicle control unit 15. The vehicle control unit 15 can obtain the temperatures of the battery 4, the motor controller 6 and the motor 8, and then adjust the opening degrees of the first flow regulating valve 3, the second flow regulating valve 5 and the third flow regulating valve 7 and the rotation speed of the fan 14 according to actual conditions, so that the various components can be kept at the optimal working temperature.
As shown in fig. 1, thermal management system 100 further includes: a water pump 12, the water pump 12 powering the flow of the coolant, the water pump 12 being connectable downstream of the engine 1, i.e. in a position between the engine 1 and the radiator 2. Also, thermal management system 100 further includes: a water tank 13, the water tank 13 being used for replenishing the cooling liquid in the circulation. The water tank 13 is connected to a pipe between the water pump 12 and the radiator 2.
A control method of the thermal management system 100 of the vehicle according to the embodiment of the present invention will be described in detail with reference to fig. 2.
S2, when the temperature of any one of the battery 4, the motor controller 6 and the motor 8 is not in the operating temperature range, at least one of the first flow rate adjustment valve 3, the second flow rate adjustment valve 5 and the third flow rate adjustment valve 7 is adjusted to change the supply amount of the cooling liquid so as to return the temperature to the operating temperature range. For example, when the temperature of the battery 4 is not in its operating temperature zone, the first flow rate adjustment valve 3 may be changed, and the temperature at the battery 4 may be changed by increasing or decreasing its opening degree, so that the temperature of the battery 4 may be quickly returned to the operating temperature zone. For another example, when the temperature of the motor controller 6 is not in the operating temperature range, the second flow regulating valve 5 may be changed, and the temperature at the motor controller 6 may be changed by increasing or decreasing the opening degree thereof, so that the temperature of the motor controller 6 may be quickly returned to the operating temperature range. For another example, when the temperature of the motor 8 is not in the operating temperature range, the third flow rate adjustment valve 7 may be changed, and the temperature of the motor 8 may be changed by increasing or decreasing the opening degree thereof, so that the temperature of the motor 8 may be quickly returned to the operating temperature range.
The control method of the thermal management system 100 is described below in conjunction with specific cases.
According to some embodiments of the invention, in step S1, it is determined that the thermal management system 100 is in a heating state, i.e., the thermal management system 100 needs the coolant to heat the corresponding component.
In step S2, when the temperature of the battery 4 is lower than the lower limit of the corresponding operating temperature range and is still lower than 15 ℃, it is confirmed that the temperature of the battery 4 is too low, the discharge performance of the battery 4 is affected at the temperature, the opening degree of the first flow rate adjustment valve 3 toward the battery 4 is adjusted to the maximum, and the fan 14 is turned off. When the vehicle runs in a low-temperature environment, the motor 8 of the battery 4 in the pure electric mode is difficult to start under the low-temperature condition, the discharging efficiency of the battery 4 is low, and the engine 1 is easy to start. The thermal management system 100 starts the engine 1, and the first flow rate adjustment valve 3 adjusts the opening degree of the battery 4 to increase the temperature of the battery 4 by increasing the temperature of the coolant of the engine 1, so that the discharging efficiency of the battery 4 can be improved, and the motor 8 can be effectively started. In addition, in order to avoid the fan 14 from affecting the heat loss, a mode of turning off the fan 14 is adopted.
On the basis, the method also comprises the following steps: s3, after the temperature of the battery 4 rises above 20 ℃, the opening degree of the first flow direction adjustment valve toward the battery 4 is adjusted, where the adjustment may be to decrease the opening degree toward the battery 4 toward the first flow direction adjustment valve 3 and turn on the fan 14, and the temperature of the battery 4 is maintained within the operating temperature interval. The fan 14 may function to improve the heat dissipation efficiency, so that the temperature of the battery 4 does not rise rapidly due to the heat generated by its operation, but is maintained within the operating temperature range, thereby improving the discharge efficiency and the working performance of the motor 8.
According to other embodiments of the present invention, in step S1, it is determined that the thermal management system 100 is in a cooling state, i.e., the thermal management system 100 needs cooling liquid to cool the corresponding component.
In the step S2, in step S2,
when the temperature of the battery 4 is higher than the upper limit of the operating temperature range, for example, when the temperature of the battery 4 is higher than 45 ℃, the opening degree of the first flow regulating valve 3 toward the battery 4 is increased, so that the coolant can better take away the heat at the battery 4, which can be beneficial to reducing the temperature of the battery 4 until the opening degree of the first flow regulating valve 3 reaches the maximum during the regulation process. And after the temperature of the battery 4 is not returned to the working temperature range within the preset time, the rotating speed of the fan 14 is increased, the heat dissipation efficiency of the radiator 2 can be improved by the fan 14, the temperature of the cooling liquid can be reduced, and therefore the battery 4 can be returned to the working temperature range, for example, 30-40 ℃.
When the temperature of the motor controller 6 is higher than the upper limit of the operating temperature range, for example, when the temperature of the motor controller 6 is higher than 50 ℃, the opening degree of the second flow regulating valve 5 towards the motor controller 6 is increased, so that the cooling liquid can better take away heat at the motor controller 6, and the temperature of the motor controller 6 can be favorably reduced until the opening degree of the second flow regulating valve 5 reaches the maximum in the regulating process. And after the temperature of the motor controller 6 is not returned to the working temperature range within the preset time, the rotating speed of the fan 14 is increased, the fan 14 can improve the heat dissipation efficiency of the radiator 2, and can be beneficial to reducing the temperature of the cooling liquid, so that the motor controller 6 can be returned to the working temperature range, for example, 30-50 ℃.
When the temperature of the motor 8 is higher than the upper limit of the working temperature interval, for example, when the temperature of the motor 8 is higher than 60 ℃, the opening degree of the third flow regulating valve 7 towards the motor 8 is increased, so that the cooling liquid can better take away the heat at the motor 8, the temperature of the motor 8 can be favorably reduced, and in the regulating process, the opening degree of the third flow regulating valve 7 is maximized. And after the temperature of the motor 8 is not returned to the working temperature range within the preset time, the rotating speed of the fan 14 is increased, the fan 14 can improve the heat dissipation efficiency of the radiator 2, and can be beneficial to reducing the temperature of the cooling liquid, so that the motor 8 can be returned to the working temperature range, for example, 30-60 ℃.
When the temperature of the battery 4 is lower than the lower limit of the corresponding operating temperature interval, for example, when the temperature of the battery 4 is lower than 30 ℃, the rotation speed of the fan 14 is reduced, so that the heat dissipation efficiency of the heat sink 2 is reduced, and thus the temperature of the coolant at the battery 4 can be controlled, and if one of the temperatures of the motor controller 6 and the motor 8 is higher than the upper limit of the corresponding operating temperature interval, the opening degree of the first flow regulating valve 3 toward the motor 8 is reduced, so that the temperatures of the motor controller 6 and the motor 8 can be considered by the thermal management system 100 at the same time, and the temperatures of the two can be maintained in the corresponding operating temperature interval.
When the temperature of the motor controller 6 is lower than the lower limit of the corresponding operating temperature interval, for example, when the temperature of the motor controller 6 is lower than 30 ℃, the rotation speed of the fan 14 is reduced, so that the heat dissipation efficiency of the heat sink 2 is reduced, and the temperature of the cooling liquid at the motor controller 6 can be controlled, if the temperatures of the motor controller 6 and the motor 8 are higher than the upper limit of the corresponding operating temperature interval, the opening degree of the second flow regulating valve 5 towards the motor 8 is reduced, so that the temperature of the battery 4 and the temperature of the motor 8 are taken into consideration by the thermal management system 100, and the temperatures of the two are maintained in the corresponding operating temperature interval.
When the temperature of the motor 8 is lower than the lower limit of the corresponding operating temperature interval, for example, when the temperature of the motor 8 is lower than 30 ℃, the rotation speed of the fan 14 is reduced, so that the heat dissipation efficiency of the heat sink 2 is reduced, and the temperature of the coolant at the motor 8 can be controlled, if the three temperatures of the motor controller 6 and the motor 8 are higher than the upper limit of the corresponding operating temperature interval, the opening degree of the third flow regulating valve 7 toward the motor 8 is reduced, so that the temperature of the battery 4 and the temperature of the motor controller 6 are taken into consideration by the thermal management system 100, and the temperatures of the two are maintained in the corresponding operating temperature interval.
Through the integrated thermal management system 100 and the corresponding control strategy, the cooling system cost of the hybrid system can be saved, the operating temperature of the hybrid system under different environments and working conditions can be maintained, and the system can operate stably.
According to the embodiment of the invention, the vehicle comprises the thermal management system 100 of the vehicle.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. A thermal management system for a vehicle, comprising: an engine, a radiator, a first flow regulating valve, a battery, a second flow regulating valve, a motor controller, a third flow regulating valve and a motor which are connected in series, wherein the motor is communicated with the engine to form a cycle, wherein a first pipeline is connected between the first flow regulating valve and the second flow regulating valve, so that the first flow rate adjustment valve adjusts the flow rate of the coolant flowing to the battery and the first pipe, a second pipe is connected between the second flow rate adjustment valve and the third flow rate adjustment valve, so that the second flow rate regulating valve regulates the flow rate of the coolant flowing to the motor controller and the second pipeline, and a third pipeline is connected between the third flow rate regulating valve and the engine, so that the third flow regulating valve regulates the flow of the coolant to the motor and the third line.
2. The vehicle thermal management system of claim 1, wherein the first flow regulator valve comprises two first outlets, the two first outlets respectively connecting the battery and the first conduit;
the second flow regulating valve comprises two second outlets which are respectively connected with the motor controller and the second pipeline;
the third flow regulating valve comprises two third outlets, and the two third outlets are respectively connected with the motor and the third pipeline.
3. The vehicle thermal management system of claim 2, wherein a drain of the battery is connected to the first conduit, a drain of the motor controller is connected to the second conduit, and a drain of the motor is connected to the third conduit.
4. The vehicle thermal management system of claim 1, wherein the battery inlet duct, the motor controller inlet duct, and the motor inlet duct are each provided with a one-way valve for one-way inflow.
5. The vehicle thermal management system of claim 1, wherein the first, second, and third flow regulating valves are thermostats or three-way electronic valves with adjustable valves.
6. The thermal management system of a vehicle of claim 1, further comprising: a fan disposed at the heat sink.
7. The thermal management system of a vehicle of claim 6, further comprising: and the battery, the motor controller, the motor, the first flow regulating valve, the second flow regulating valve, the third flow regulating valve and the fan are in signal connection with the vehicle control unit.
8. The control method of a thermal management system of a vehicle according to any one of claims 1 to 7, characterized by comprising the steps of:
s1, acquiring the temperatures of the battery, the motor controller and the motor, comparing the acquired temperatures with respective working temperature intervals, and judging the current heat load state;
and S2, when the temperature of any one of the battery, the motor controller and the motor is not in the working temperature interval, adjusting at least one of the first flow regulating valve, the second flow regulating valve and the third flow regulating valve, and changing the supply amount of the cooling liquid so as to return the temperature to the working temperature interval.
9. The control method of a thermal management system of a vehicle according to claim 8, characterized in that the thermal management system comprises: a fan;
in step S1, determining that the thermal management system is in a heating state;
in step S2, when the temperature of the battery is lower than the corresponding lower limit of the operating temperature range and is also lower than 15 ℃, the opening degree of the first flow rate adjustment valve toward the battery is adjusted to the maximum, and the fan is turned off.
10. The method of controlling a thermal management system of a vehicle according to claim 9, characterized by further comprising:
and S3, after the temperature of the battery is increased to be higher than 20 ℃, the opening degree of the first flow regulating valve facing the battery is regulated, the fan is opened, and the temperature of the battery is maintained in an operating temperature interval.
11. The control method of a thermal management system of a vehicle according to claim 8, characterized in that the thermal management system comprises: a fan;
in step S1, determining that the thermal management system is in a cooling state;
in the step S2, in the above step,
when the temperature of the battery is higher than the upper limit of the working temperature interval, increasing the opening degree of the first flow regulating valve towards the battery, and increasing the rotating speed of the fan after the temperature of the battery does not return to the working temperature interval within preset time to return the battery to the working temperature interval;
when the temperature of the motor controller is higher than the upper limit of the working temperature interval, increasing the opening of the second flow regulating valve towards the motor controller, and increasing the rotating speed of the fan after the temperature of the motor controller does not return to the working temperature interval within preset time to enable the motor controller to return to the working temperature interval;
when the temperature of the motor is higher than the upper limit of the working temperature interval, increasing the opening degree of the third flow regulating valve towards the motor, and increasing the rotating speed of the fan after the temperature of the motor does not return to the working temperature interval within preset time to return the motor to the working temperature interval;
when the temperature of the battery is lower than the corresponding lower limit of the working temperature interval, reducing the rotating speed of the fan, and if the temperatures of the motor controller and the motor are higher than the corresponding upper limit of the working temperature interval, reducing the opening degree of the first flow regulating valve towards the battery;
when the temperature of the motor controller is lower than the corresponding lower limit of the working temperature interval, reducing the rotating speed of the fan, and if the temperature of the battery and the motor is higher than the corresponding upper limit of the working temperature interval, reducing the opening degree of the second flow regulating valve towards the motor controller;
and when the temperature of the motor is lower than the lower limit of the corresponding working temperature interval, reducing the rotating speed of the fan, and if the temperatures of the battery and the motor controller are higher than the upper limit of the corresponding working temperature interval, reducing the opening degree of the third flow regulating valve towards the motor.
12. A vehicle comprising a thermal management system of the vehicle of any of claims 1-7.
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| CN110843505B (en) * | 2019-11-14 | 2024-06-14 | 宁波圣龙汽车动力***股份有限公司 | Heat radiation system of hub motor vehicle and control method thereof |
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| JP5880863B2 (en) * | 2012-02-02 | 2016-03-09 | 株式会社デンソー | Thermal management system for vehicles |
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