CN115247642A - Vehicle thermal management method and device and vehicle - Google Patents
Vehicle thermal management method and device and vehicle Download PDFInfo
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- CN115247642A CN115247642A CN202110453836.7A CN202110453836A CN115247642A CN 115247642 A CN115247642 A CN 115247642A CN 202110453836 A CN202110453836 A CN 202110453836A CN 115247642 A CN115247642 A CN 115247642A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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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
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
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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
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The application provides a vehicle thermal management method, a device and a vehicle, wherein the method comprises the following steps: acquiring the total heat dissipation capacity of at least one target cooling component at the current moment; generating optimal power of a water pump and a fan of the vehicle according to the total heat dissipation capacity of the at least one target cooling component, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located; and controlling the water pump and/or the fan to work at the corresponding optimal power by a preset energy-saving strategy. According to the vehicle thermal management method, the problems that the stability of a cooling system is not facilitated in the related art are solved, the energy-saving effect is poor, the risk of high energy consumption is caused, and the better energy-saving effect is achieved.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a vehicle and a thermal management method and device thereof.
Background
At present, the phenomenon of energy shortage is increasingly obvious, and the reduction of the energy consumption of the whole vehicle is increasingly important.
In the related art, when parts have demands, the water pump which needs the current water temperature or the body temperature is obtained in a table look-up mode, and the fan is adjusted after the water pump is adjusted to the maximum.
However, this method is not favorable for the stability of the cooling system, not only the energy saving effect is poor, but also the risk of high energy consumption occurs, and a solution is urgently needed.
Content of application
In view of this, the present application aims to provide a vehicle thermal management method, which solves the problem in the related art that when parts have requirements, a current water temperature or how large a water pump needs is obtained in a table look-up manner, and the fan is adjusted after the water pump is adjusted to the maximum, so that the cooling system is unstable, the energy saving effect is poor, and even the risk of high energy consumption occurs, so that the vehicle thermal management method has a good energy saving effect.
In order to achieve the purpose, the technical scheme of the application is realized as follows:
a method of thermal management of a vehicle, comprising the steps of:
acquiring the total heat dissipation capacity of at least one target cooling component at the current moment;
generating optimal power of a water pump and a fan of the vehicle according to the total heat dissipation capacity of the at least one target cooling component, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located; and
and controlling the water pump and/or the fan to work at the corresponding optimal power by a preset energy-saving strategy.
Further, the method for controlling the water pump and/or the fan to work at the corresponding optimal power by the preset energy-saving strategy comprises the following steps:
adjusting the water pump to cool the at least one target cooling component with the optimal power of the water pump, and detecting the cooling value of the at least one target cooling component;
and when the cooling value does not reach the preset cooling value, adjusting the output power of the water pump to be lower than the preset power of the optimal power, and adjusting the fan to cool at least one target cooling component together with the optimal power of the fan.
Further, the thermal management method for a vehicle further includes:
when the actual temperature of at least one target cooling component or the cooling liquid is lower than a first preset temperature, the fan stops working, the water pump is adjusted to cool the at least one target cooling component at the optimal power of the water pump, and the water pump stops working until the actual temperature of the at least one target cooling component or the cooling liquid is lower than a second preset temperature, wherein the second preset temperature is lower than the first preset temperature.
Further, obtaining a heat dissipation capacity of the at least one target cooling component includes:
acquiring actual power of each target cooling component;
and calculating the heat dissipation capacity of each target cooling component according to the actual power of each target cooling component to obtain the total heat dissipation capacity of the low-temperature loop.
Further, after acquiring the total heat dissipation capacity of the at least one target cooling component, the method further comprises the following steps:
acquiring the total heat dissipation capacity of at least one target cooling part at the next moment every preset time;
calculating the difference between the total heat dissipation capacity of the current moment and the total heat dissipation capacity of the next moment;
and if the absolute value of the difference is smaller than or equal to the preset threshold, taking the total heat dissipation capacity at the current moment as the total heat dissipation capacity of the low-temperature loop.
Compared with the prior art, the vehicle thermal management method has the following advantages:
according to the vehicle thermal management method, the optimal power of the water pump and the fan of the vehicle can be generated according to the obtained total heat dissipation capacity of the target cooling components at the current moment, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located, and the water pump and/or the fan are controlled to work at the corresponding optimal power according to a certain energy-saving strategy, so that the problem that the stability of a cooling system is not facilitated in the related technology is solved, the energy-saving effect is poor, the risk of high energy consumption is caused, and the better energy-saving effect is achieved.
A second object of the present application is to propose a thermal management device of a vehicle.
In order to achieve the purpose, the technical scheme of the application is realized as follows:
a thermal management apparatus of a vehicle, comprising:
the acquisition module is used for acquiring the total heat dissipation capacity of at least one target cooling component at the current moment;
the generating module is used for generating the optimal power of a water pump and a fan of the vehicle according to the total heat dissipation capacity of the at least one target cooling component, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located; and
and the control module is used for controlling the water pump and/or the fan to work at the corresponding optimal power according to a preset energy-saving strategy.
Further, the control module is specifically configured to:
adjusting the water pump to cool the at least one target cooling component with the optimal power of the water pump, and detecting the cooling value of the at least one target cooling component;
and when the cooling value does not reach the preset cooling value, adjusting the output power of the water pump to be lower than the preset power of the optimal power, and adjusting the fan to cool at least one target cooling component together with the optimal power of the fan.
Further, the above thermal management apparatus for a vehicle further includes:
and the adjusting module is used for stopping the fan from working when the actual temperature of the at least one target cooling component or the cooling liquid is lower than a first preset temperature, and simultaneously, cooling the at least one target cooling component by using the optimal power of the water pump through adjusting the water pump until the actual temperature of the at least one target cooling component or the cooling liquid is lower than a second preset temperature, and stopping the water pump from working, wherein the second preset temperature is lower than the first preset temperature.
Further, the obtaining module is specifically configured to:
acquiring actual power of each target cooling component;
and calculating the heat dissipation capacity of each target cooling component according to the actual power of each target cooling component to obtain the total heat dissipation capacity of the low-temperature loop.
Further, after obtaining the total heat dissipation of the at least one target cooling component, the obtaining module is further configured to:
acquiring the total heat dissipation capacity of at least one target cooling component at the next moment every preset time;
calculating a difference value between the total heat dissipation capacity of the current moment and the total heat dissipation capacity of the next moment;
and if the absolute value of the difference is smaller than or equal to the preset threshold, taking the total heat dissipation capacity at the current moment as the total heat dissipation capacity of the low-temperature loop.
Compared with the prior art, the thermal management device of the vehicle has the following advantages:
the heat management device of the vehicle can generate the optimal power of the water pump and the fan of the vehicle according to the obtained total heat dissipation capacity of the target cooling components at the current moment, the current speed of the vehicle and the current temperature of the environment where the vehicle is located, and controls the water pump and/or the fan to work at the corresponding optimal power according to a certain energy-saving strategy, so that the problem that the cooling system is not beneficial to stability in the related technology is solved, the energy-saving effect is poor, the risk of high energy consumption is caused, and the better energy-saving effect is achieved.
A third object of the present application is to propose a vehicle.
In order to achieve the purpose, the technical scheme of the application is realized as follows:
a vehicle is provided with the thermal management device of the vehicle as in the above embodiment.
The vehicle and the vehicle thermal management device have the same advantages compared with the prior art, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a flow chart of a method for thermal management of a vehicle according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for thermal management of a vehicle according to an exemplary embodiment of the present application;
FIG. 3 is a flow chart of a method for thermal management of a vehicle according to another embodiment of the present application;
fig. 4 is a block diagram illustrating a thermal management device of a vehicle according to an embodiment of the present application.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a flow chart of a method for thermal management of a vehicle according to an embodiment of the present application.
Before describing the method for thermal management of a vehicle according to an embodiment of the present application, the following approaches and disadvantages of the related art will be briefly described.
In the related art, generally, when parts have requirements, a water pump which is required to the current water temperature or the body temperature is obtained in a table look-up mode of the water temperature or the body temperature, and the fan is adjusted after the water pump is adjusted to the maximum degree, so that the energy-saving concept is not included.
However, this approach has the following disadvantages:
(1) The strategy of acquiring the power of the water pump through a water temperature look-up table and then adjusting the fan to the maximum and then starting to adjust the fan is not energy-saving, because if the contribution of the water pump to cooling is weakened or reduced, the rotating speed of the water pump should be timely reduced, and then the power of the fan is increased to increase the cooling effect.
(2) By looking up a table through a single water temperature factor, the acquired power of the water pump or the fan is possibly only suitable for cooling at a certain environment temperature and a certain vehicle speed, for example, if the calibration work is carried out at the environment temperature of 40 ℃, and the inlet water temperature is 60 ℃, the requested water pump or fan can be directly the maximum duty ratio, but when the environment temperature is-20 ℃, the water temperature is 60 ℃, the actually required water pump and fan are not the maximum duty ratio, but the requested water pump and fan are the maximum duty ratio of the previous strategy, so that the energy conservation is not facilitated, the stability of a cooling system is not facilitated, and the large fluctuation of the water temperature can be caused; moreover, the table lookup requires a lot of calibration work to finally determine the table value, and requires a lot of manpower and material resources.
(3) The cooling request firstly requests the water pump and then requests the fan, and a combination is not directly requested, so that the risk of untimely cooling and high energy consumption exists in the serial control.
The present application is based on the above problems, and provides a vehicle thermal management method, which may generate optimal powers of a water pump and a fan of a vehicle according to the obtained total heat dissipation amounts of a plurality of target cooling components at the current time, the current vehicle speed of the vehicle, and the current temperature of the environment where the vehicle is located, and control the water pump and/or the fan to operate at the corresponding optimal powers according to a certain energy saving strategy, so as to solve the problem that the stability of a cooling system is not facilitated in the related art, and thus, not only the energy saving effect is poor, but also the risk of high energy consumption occurs, and the method has a better energy saving effect.
Specifically, as shown in fig. 1, a thermal management method for a vehicle according to an embodiment of the present application includes the steps of:
in step S101, the total heat dissipation amount of at least one target cooling component at the present time is acquired.
Further, in some embodiments, obtaining heat dissipation from at least one target cooling component comprises: acquiring actual power of each target cooling component; and calculating the heat dissipation capacity of each target cooling component according to the actual power of each target cooling component to obtain the total heat dissipation capacity of the low-temperature loop.
The target cooling component may include, but is not limited to, a drive motor, a motor controller, a charger, a BSG (Belt-drive Starter Generator), or a BSG controller, among others.
Specifically, the embodiment of the present application may obtain the actual power of each target cooling component, and calculate the total heat dissipation capacity of the low-temperature circuit by the following formula:
Q1＝P1*η1+P2*η2+P3*η3+……+Pn*ηn；
where Q1 is the total heat dissipated by the low temperature circuit, P represents the power of the target cooling component, η is the efficiency of the target cooling component, and n represents the number of target cooling components in the overall circuit.
Further, in some embodiments, after obtaining the total heat dissipation amount of the at least one target cooling component, the method further includes: acquiring the total heat dissipation capacity of at least one target cooling component at the next moment every preset time; calculating the difference between the total heat dissipation capacity of the current moment and the total heat dissipation capacity of the next moment; and if the absolute value of the difference is smaller than or equal to the preset threshold, taking the total heat dissipation capacity at the current moment as the total heat dissipation capacity of the low-temperature loop.
It should be understood that, since the vehicle condition is instantaneously changed, the embodiment of the present application may collect the difference value between the total heat dissipation amount at the current time and the total heat dissipation amount at the next time every preset time period, for example, 2s, and if the absolute value of the difference value is less than or equal to a preset threshold value, for example, 0.5kw, the total heat dissipation amount at the current time is taken as the total heat dissipation amount of the low-temperature loop.
In step S102, an optimal power of a water pump and a fan of the vehicle is generated according to a total heat dissipation amount of the at least one target cooling component, a current vehicle speed of the vehicle, and a current temperature of an environment in which the vehicle is located.
That is to say, the embodiment of the present application may generate the optimal power of the water pump and the fan of the vehicle by collecting the sum of the total heat dissipation amounts of the current low-temperature loop and simultaneously monitoring the current temperature of the environment where the vehicle is located and the current speed of the vehicle, where the generated optimal power of the water pump and the fan of the vehicle may be as shown in tables 1 and 2, and tables 1 and 2 respectively generate the combination (optimal power) of the rotation speeds of the water pump and the fan of the vehicle at different speeds and at different loop temperatures when the total heat dissipation amount is 1kw and 2 kw.
TABLE 1
TABLE 2
It should be noted that tables 1 and 2 show table parameters, for example, at 20 ℃, the vehicle speed is 60km/h, the corresponding water pump rotation speed may be 50%, and the fan rotation speed may be 30%; when the vehicle speed is 80km/h at 60 ℃, the corresponding water pump rotating speed can be 70%, the fan rotating speed can be 40%, and specifically, the water pump and fan rotating speed values can be calibrated according to actual conditions, which is not specifically limited herein. If the total heat dissipation capacity of the low-temperature loop is large, the low-temperature loop needs to be classified according to the total heat dissipation capacity, each gear needs to be subjected to table lookup to obtain the combination of the water pump and the fan rotating speed, and if the total heat dissipation capacity is not an integer, the table lookup can be carried out after rounding up.
In step S103, the water pump and/or the fan are controlled to operate at the corresponding optimal power according to a preset energy-saving strategy.
Further, in some embodiments, controlling the water pump and/or the fan to operate at the corresponding optimal power with a preset energy-saving strategy includes: adjusting a water pump to cool at least one target cooling component by the optimal power of the water pump, and detecting the cooling value of at least one target cooling component; and when the cooling value does not reach the preset cooling value, adjusting the output power of the water pump to be lower than the preset power of the optimal power, and adjusting the fan to cool at least one target cooling component together with the optimal power of the fan.
Further, in some embodiments, the thermal management method of a vehicle described above further includes: when the actual temperature of at least one target cooling component or the cooling liquid is lower than a first preset temperature, the fan stops working, the water pump is adjusted to cool the at least one target cooling component at the optimal power of the water pump, and the water pump stops working until the actual temperature of the at least one target cooling component or the cooling liquid is lower than a second preset temperature, wherein the second preset temperature is lower than the first preset temperature.
Therefore, the power of the water pump and the fan is adjusted in a self-adaptive mode, the water pump is adjusted preferentially when cooling is required, if the cooling effect is not obvious, the power of the water pump is reduced, then the power of the fan is adjusted, the water temperature or the body temperature is guaranteed, meanwhile, the optimal power of the fan and the water pump is guaranteed, and the energy consumption is minimum; when not needing the cooling, the preferential regulation fan, if the temperature rise effect is not obvious, just can be to the power of water pump derating, when guaranteeing temperature or body temperature, guarantee the power optimality of fan and water pump, the energy consumption is minimum.
To facilitate further understanding of the thermal management method for a vehicle according to the embodiment of the present application, the following detailed description is provided with reference to fig. 2.
As shown in fig. 2, fig. 2 is a flowchart of a thermal management method of a vehicle according to an embodiment of the present application.
The thermal management method of the vehicle comprises the following steps:
s201, obtaining heat dissipation capacity of a rear drive motor, heat dissipation capacity of a rear drive motor controller, heat dissipation capacity of BSG, heat dissipation capacity of the BSG controller and heat dissipation capacity of a charger.
S202, the sum of heat dissipation amounts of the high pressure member (target cooling member) is obtained.
And S203, determining the combination of the duty ratio (rotating speed) of the fan and the duty ratio (rotating speed) of the water pump according to the sum of the heat dissipating capacity of the high-pressure part and the table look-up of a calculation table by combining the environmental temperature, the vehicle speed and the water outlet temperature requirement of the low-temperature radiator.
It should be understood that, the embodiment of the application can collect the sum of the total heat dissipation capacity of the current low-temperature loop, simultaneously monitor the ambient temperature and the vehicle speed signal, and perform table look-up on the requirements of the water pump and the fan of the current low-temperature loop, wherein the acquired water temperature requirement of the water outlet of the low-temperature radiator is a value obtained by comparing the water temperature requirements of each part, and 62 ℃ is taken here.
Moreover, the energy-saving control method has a good energy-saving effect, for example, if the loop temperature is 50 degrees, the control method in the comparison document is adopted to adjust the water pump to the maximum duty ratio and then the fan is adjusted, and the water pump can rotate at 50% and the fan can rotate at 30% to ensure that the power of the fan and the water pump is optimal and the energy consumption is minimum, so that the energy-saving control method has a good energy-saving effect compared with the control method in the related art.
S204, the combination of the water pump rotating speed and the fan rotating speed in the table is executed.
After the duty ratio combination of the water pump and the fan is obtained, the duty ratio of the water pump is executed, the duty ratio of the fan is sent to the controller, and the fan controller compares the duty ratio with other fan duty ratio requests to execute the duty ratio combination in a large scale.
S205, judging whether the outlet water temperature of the low-temperature radiator is more than or equal to 50 ℃ and less than or equal to 62 ℃, if so, executing a step S206, otherwise, executing a step S207.
And S206, executing according to the duty ratios of the water pump and the fan in the table.
And S207, judging whether the outlet water temperature of the low-temperature radiator is greater than 62 ℃, if so, executing a step S214, otherwise, executing a step S208.
And S208, executing the water outlet temperature of the low-temperature radiator to be less than 50 ℃.
S209, judging whether the duty ratio of the fan is 0, if so, executing step S212, otherwise, executing step S210.
And S210, subtracting 10% from the duty ratio of the fan.
It should be noted that, when the water temperature is low, the principle of preferentially reducing the duty ratio of the fan is observed, so as to save energy consumption, because the power of the fan is high, and the power of the water pump is usually a water pump with dozens of watts, which is low.
S211, executing the current fan duty ratio, and skipping to execute step S213.
And S212, judging whether the duty ratio of the water pump is 0, if so, executing the step S205, otherwise, executing the step S213.
And S213, subtracting 10% from the water pump duty ratio, and skipping to execute the step S205.
S214, judging whether the current duty ratio of the water pump is 100%, if so, executing step S218, otherwise, executing step S215.
And S215, increasing the duty ratio of the water pump by 10%.
S216, judging whether the water temperature reduction rate of the low-temperature radiator outlet water meets a preset value, if so, executing step S215, otherwise, executing step S217.
It should be noted that the preset value may be calibrated by a person skilled in the art according to actual conditions, and is not specifically limited herein, if the cooling rate reaches the preset value, it indicates that the purpose of cooling the components can be achieved by increasing the duty ratio of the water pump, and if the cooling rate cannot reach the preset value, it indicates that the increase of the duty ratio of the water pump cannot be effective cooling, or cannot be efficient cooling.
And S217, recovering the previous duty ratio by the water pump duty ratio.
S218, judging whether the duty ratio of the request fan is 100%, if so, executing step S219, otherwise, executing step S220.
And S219, performing power-limited operation on the components.
It should be noted that, when the water temperature is high, the duty ratio of the water pump is preferentially increased to reduce the temperature, and then the power of the fan is increased.
S220, the duty ratio of the fan is increased by 10%, and the step S205 is skipped to perform.
It should be understood that after the water pump recovers the previous duty ratio, whether the requested fan duty ratio is 100% or not is judged, if not, it is proved that although the water pump cannot effectively cool down the fan, the fan has potential, so the duty ratio of the fan needs to be increased, at this time, the duty ratio of the fan is increased by 10%, because the cooling effect is obvious after the duty ratio of the fan is increased, the fan duty ratio is directly judged that the initial condition that the temperature of the water discharged from the low-temperature radiator is greater than or equal to 50 ℃ and less than or equal to 62 ℃, and then the strategy enters a circulation state;
in addition, because the body temperature of each part is tested, the heat management design of the part is good, the body temperature is generally instantaneous and has less occurrence probability, and therefore when the body temperature of any part is over-temperature, the duty ratio requests of the water pump and the fan are both 100% to avoid excessive heat accumulation and damage to the part.
Therefore, as shown in fig. 3, in the embodiment of the present application, the body temperature of the rear-drive motor controller, the body temperature of the BSG controller, and the body temperature of the charger may also be obtained, and it is determined whether the temperatures all satisfy the body temperature limits, if yes, the step S203 is skipped, otherwise, the duty ratio of the water pump is requested to be 100% + the duty ratio of the fan is requested to be 100%, and the components are operated with limited power, and it is further determined whether the temperatures all satisfy the body temperature limits, and the steps are performed in a loop.
Therefore, the requirement of cooling the parts can be reflected more quickly and more directly by collecting the total heat, because the heat dissipation of the parts is realized by firstly transferring heat loss to the body and then transferring water, the heat can be obtained more directly and earliest by directly calculating the heat dissipation capacity by using power, and if water is taken as a reference amount and the temperature of the water possibly comes, the temperature of the body of the parts is already reached, so the total heat is calculated by using power, and the system cooling is correspondingly fastest;
and, obtain total heat, for the heat of obtaining every spare part alone, the cooling effect is the same, but the heat of calculating every spare part, then get big the duty cycle that obtains fan or water pump, get the method of total heat, better simple swift, only need to calculate corresponding water pump and fan duty cycle to total heat, then directly look up the table can, need not carry out than big processing again.
According to the vehicle thermal management method provided by the embodiment of the application, the optimal power of the water pump and the fan of the vehicle can be generated according to the obtained total heat dissipation capacity of the target cooling components at the current moment, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located, and the water pump and/or the fan are controlled to work at the corresponding optimal power according to a certain energy-saving strategy, so that the problem that the stability of a cooling system is not facilitated in the related technology is solved, the energy-saving effect is poor, the risk of high energy consumption is caused, the control fluctuation and the control process caused by large changes of the environment temperature and the vehicle speed are avoided, and the better energy-saving effect is achieved.
Fig. 4 is a block schematic diagram of a thermal management device of a vehicle according to an embodiment of the present application.
As shown in fig. 4, the thermal management apparatus 10 of the vehicle includes: an acquisition module 100, a generation module 200 and a control module 300.
The obtaining module 100 is configured to obtain a total heat dissipation amount of at least one target cooling component at a current moment;
the generation module 200 is used for generating the optimal power of a water pump and a fan of the vehicle according to the total heat dissipation capacity of at least one target cooling component, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located; and
the control module 300 is configured to control the water pump and/or the fan to operate at the corresponding optimal power according to a predetermined energy-saving strategy.
Further, the control module 300 is specifically configured to:
adjusting the water pump to cool the at least one target cooling component with the optimal power of the water pump, and detecting the cooling value of the at least one target cooling component;
and when the cooling value does not reach the preset cooling value, adjusting the output power of the water pump to be lower than the preset power of the optimal power, and adjusting the fan to cool at least one target cooling component together with the optimal power of the fan.
Further, the thermal management device 10 for a vehicle described above further includes:
and the adjusting module is used for stopping the fan from working when the actual temperature of the at least one target cooling component or the cooling liquid is lower than a first preset temperature, and simultaneously, cooling the at least one target cooling component by using the optimal power of the water pump through adjusting the water pump until the actual temperature of the at least one target cooling component or the cooling liquid is lower than a second preset temperature, and stopping the water pump from working, wherein the second preset temperature is lower than the first preset temperature.
Further, the obtaining module 100 is specifically configured to:
acquiring actual power of each target cooling component;
and calculating the heat dissipation capacity of each target cooling component according to the actual power of each target cooling component to obtain the total heat dissipation capacity of the low-temperature loop.
Further, after obtaining the total heat dissipation amount of the at least one target cooling component, the obtaining module 100 is further configured to:
acquiring the total heat dissipation capacity of at least one target cooling component at the next moment every preset time;
calculating a difference value between the total heat dissipation capacity of the current moment and the total heat dissipation capacity of the next moment;
and if the absolute value of the difference is smaller than or equal to the preset threshold, taking the total heat dissipation capacity at the current moment as the total heat dissipation capacity of the low-temperature loop.
According to the thermal management device for the vehicle, the optimal power of the water pump and the fan of the vehicle can be generated according to the obtained total heat dissipation capacity of the target cooling components at the current moment, the current speed of the vehicle and the current temperature of the environment where the vehicle is located, and the water pump and/or the fan are controlled to work at the corresponding optimal power according to a certain energy-saving strategy, so that the problem that the stability of a cooling system is not facilitated in the related technology is solved, the energy-saving effect is poor, the risk of high energy consumption is caused, the control fluctuation and the control process caused by large changes of the environment temperature and the vehicle speed are avoided, and the better energy-saving effect is achieved.
Further, an embodiment of the present application discloses a vehicle provided with the thermal management device of the vehicle of the above-described embodiment. The vehicle is provided with the heat management device, so that the problems that the stability of a cooling system is not facilitated in the related technology is solved, the energy-saving effect is poor, the risk of high energy consumption is caused, the control fluctuation and the control process caused by large changes of the environmental temperature and the vehicle speed are avoided, and the better energy-saving effect is achieved.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of thermal management for a vehicle, comprising the steps of:
acquiring the total heat dissipation capacity of at least one target cooling component at the current moment;
generating optimal power of a water pump and a fan of the vehicle according to the total heat dissipation capacity of the at least one target cooling component, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located; and
and controlling the water pump and/or the fan to work at the corresponding optimal power by a preset energy-saving strategy.
2. The method according to claim 1, wherein said controlling said water pump and/or said fan to operate at a corresponding optimal power with a preset energy saving strategy comprises:
adjusting the water pump to cool the at least one target cooling component at the optimal power of the water pump, and detecting the cooling value of the at least one target cooling component;
and when the cooling value does not reach a preset cooling value, adjusting the output power of the water pump to be lower than the preset power of the optimal power, and adjusting the fan to cool the at least one target cooling component together with the optimal power of the fan.
3. The method of claim 2, further comprising:
when the actual temperature of the at least one target cooling component or the cooling liquid is lower than a first preset temperature, the fan stops working, the water pump is adjusted to cool the at least one target cooling component at the optimal power of the water pump at the same time, and the water pump stops working until the actual temperature of the at least one target cooling component or the cooling liquid is lower than a second preset temperature, wherein the second preset temperature is lower than the first preset temperature.
4. The method of claim 1, wherein said obtaining heat dissipation from at least one target cooling component comprises:
acquiring actual power of each target cooling component;
and calculating the heat dissipation capacity of each target cooling component according to the actual power of each target cooling component to obtain the total heat dissipation capacity of the low-temperature loop.
5. The method of claim 1, further comprising, after obtaining the total heat dissipated by the at least one target cooled component:
acquiring the total heat dissipation capacity of at least one target cooling component at the next moment every preset time;
calculating the difference between the total heat dissipation capacity at the current moment and the total heat dissipation capacity at the next moment;
and if the absolute value of the difference is smaller than or equal to a preset threshold, taking the total heat dissipation capacity at the current moment as the total heat dissipation capacity of the low-temperature loop.
6. A thermal management apparatus of a vehicle, characterized by comprising:
the acquisition module is used for acquiring the total heat dissipation capacity of at least one target cooling component at the current moment;
the generating module is used for generating the optimal power of a water pump and a fan of the vehicle according to the total heat dissipation capacity of the at least one target cooling component, the current vehicle speed of the vehicle and the current temperature of the environment where the vehicle is located; and
and the control module is used for controlling the water pump and/or the fan to work at the corresponding optimal power according to a preset energy-saving strategy.
7. The apparatus of claim 6, wherein the control module is specifically configured to:
adjusting the water pump to cool the at least one target cooling component at the optimal power of the water pump, and detecting the cooling value of the at least one target cooling component;
and when the cooling value does not reach a preset cooling value, adjusting the output power of the water pump to be lower than the preset power of the optimal power, and adjusting the fan to cool the at least one target cooling component together with the optimal power of the fan.
8. The apparatus of claim 7, further comprising:
and the adjusting module is used for stopping the fan from working when the actual temperature of the at least one target cooling component or the cooling liquid is lower than a first preset temperature, and meanwhile, adjusting the water pump to cool the at least one target cooling component at the optimal power of the water pump until the actual temperature of the at least one target cooling component or the cooling liquid is lower than a second preset temperature, and stopping the water pump from working, wherein the second preset temperature is lower than the first preset temperature.
9. The apparatus of claim 6, wherein the obtaining module is specifically configured to:
acquiring actual power of each target cooling component;
and calculating the heat dissipation capacity of each target cooling component according to the actual power of each target cooling component to obtain the total heat dissipation capacity of the low-temperature loop.
10. A vehicle, characterized by comprising: a thermal management apparatus of a vehicle as claimed in any one of claims 6 to 9.
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| CN202110453836.7A CN115247642A (en) | 2021-04-26 | 2021-04-26 | Vehicle thermal management method and device and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117913327A (en) * | 2024-03-20 | 2024-04-19 | 西北工业大学宁波研究院 | Temperature control method of PEMFC thermal management system based on cooperative control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117913327A (en) * | 2024-03-20 | 2024-04-19 | 西北工业大学宁波研究院 | Temperature control method of PEMFC thermal management system based on cooperative control |
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