CN108501689B - Thermal management method and system for vehicle high-voltage accessory and vehicle - Google Patents
Thermal management method and system for vehicle high-voltage accessory and vehicle Download PDFInfo
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- CN108501689B CN108501689B CN201710114156.6A CN201710114156A CN108501689B CN 108501689 B CN108501689 B CN 108501689B CN 201710114156 A CN201710114156 A CN 201710114156A CN 108501689 B CN108501689 B CN 108501689B
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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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Combustion & Propulsion (AREA)
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- Automation & Control Theory (AREA)
- Air-Conditioning For Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a vehicle high-voltage accessory thermal management method, a vehicle high-voltage accessory thermal management system and a vehicle, wherein the method comprises the following steps: acquiring the current temperature of a cooling liquid in a cooling system of a vehicle, wherein the cooling system comprises a water pump and a fan; judging whether the current temperature of the cooling liquid is greater than a first temperature threshold value or not; and if the current temperature of the cooling liquid is greater than a first temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the running rotating speed of the fan according to the current temperature of the cooling liquid. The method controls the running states of the water pump and the fan according to the heat dissipation requirement of the high-voltage accessory, avoids providing excessive heat dissipation capacity, reduces the electric energy consumption and further improves the endurance mileage.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a thermal management method and system for a high-voltage accessory of a vehicle and the vehicle.
Background
Compared with the traditional fuel vehicle, the pure electric vehicle is completely driven by the power battery, and all vehicle-mounted accessories are powered by the power battery. In the case of a battery technology bottleneck, reducing accessory energy consumption becomes a mainstream method for improving driving range.
In the related art, the vehicle-mounted heat dissipation device is started to dissipate heat of high-voltage accessories of the whole vehicle according to heat dissipation requirements, and in order to meet the requirements, excessive electric energy consumption is usually provided, so that the driving range is reduced.
Disclosure of Invention
In view of this, the present invention is directed to a control method for an electronic supercharger, which can save electric energy and increase a driving range on the premise of satisfying a heat dissipation requirement of a high-voltage accessory.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of thermal management of a high-voltage accessory of a vehicle, comprising the steps of: acquiring the current temperature of a cooling liquid in a cooling system of a vehicle, wherein the cooling system comprises a water pump and a fan; judging whether the current temperature of the cooling liquid is greater than a first temperature threshold value or not; and if the current temperature of the cooling liquid is greater than a first temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the running rotating speed of the fan according to the current temperature of the cooling liquid.
Further, the method also comprises the following steps: when the current temperature of the cooling liquid is smaller than or equal to the first temperature threshold value, acquiring the sum of the heating power of high-voltage accessories of the vehicle; acquiring a water pump duty ratio corresponding to the sum of the heating power from a preset water pump duty ratio-cooling liquid temperature calibration table; and controlling the running state of the water pump according to the duty ratio of the water pump corresponding to the sum of the heating power.
Further, the method also comprises the following steps: if the current temperature of the cooling liquid is larger than a second temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the fan to run at the maximum rotating speed; wherein the second temperature threshold is greater than the first temperature threshold.
Further, the preset water pump duty ratio-coolant temperature calibration table includes a first preset water pump duty ratio-coolant temperature calibration table and a second preset water pump duty ratio-coolant temperature calibration table, where the first preset water pump duty ratio-coolant temperature calibration table is used to provide a corresponding value between the sum of the heating power of the high-voltage accessory of the vehicle in a charging state and the water pump duty ratio, and the second preset water pump duty ratio-coolant temperature calibration table is used to provide a corresponding value between the sum of the heating power of the high-voltage accessory of the vehicle in a non-charging state and the water pump duty ratio.
Compared with the prior art, the thermal management method of the vehicle high-voltage accessory has the following advantages:
according to the heat management method of the high-voltage accessory of the vehicle, the running states of the water pump and the fan are controlled according to the heat dissipation requirement of the high-voltage accessory, excessive heat dissipation capacity is avoided, electric energy consumption is reduced, and the endurance mileage is further improved.
Another objective of the present invention is to provide a thermal management system for a high-voltage accessory of a vehicle, which can save electric energy and increase driving range on the premise of meeting the heat dissipation requirement of the high-voltage accessory.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a thermal management system for a high-voltage accessory of a vehicle, comprising: the cooling system comprises a cooling liquid temperature acquisition module, a cooling liquid temperature acquisition module and a control module, wherein the cooling liquid temperature acquisition module is used for acquiring the current temperature of cooling liquid in a cooling system of a vehicle, and the cooling system comprises a water pump and a fan; and the control module is used for judging whether the current temperature of the cooling liquid is greater than a first temperature threshold value or not, starting the water pump at the maximum duty ratio when the current temperature of the cooling liquid is greater than the first temperature threshold value, and controlling the running rotating speed of the fan according to the current temperature of the cooling liquid.
Further, the control module is further configured to, when the current temperature of the coolant is less than or equal to the first temperature threshold, obtain a sum of heating powers of high-voltage accessories of the vehicle, obtain a water pump duty ratio corresponding to the sum of the heating powers from a preset water pump duty ratio-coolant temperature calibration table, and control an operating state of the water pump according to the water pump duty ratio corresponding to the sum of the heating powers.
Further, the control module is further configured to start the water pump at a maximum duty ratio and control the fan to operate at a maximum rotation speed when the current temperature of the cooling liquid is greater than a second temperature threshold, where the second temperature threshold is greater than the first temperature threshold.
Further, the preset water pump duty ratio-coolant temperature calibration table includes a first preset water pump duty ratio-coolant temperature calibration table and a second preset water pump duty ratio-coolant temperature calibration table, where the first preset water pump duty ratio-coolant temperature calibration table is used to provide a corresponding value between the sum of the heating power of the high-voltage accessory of the vehicle in a charging state and the water pump duty ratio, and the second preset water pump duty ratio-coolant temperature calibration table is used to provide a corresponding value between the sum of the heating power of the high-voltage accessory of the vehicle in a non-charging state and the water pump duty ratio.
Further, the high-voltage accessories of the vehicle comprise a direct-current power supply, a micro control unit, a motor and a vehicle-mounted charger.
Compared with the prior art, the vehicle high-voltage accessory thermal management system and the vehicle high-voltage accessory thermal management method have the same advantages, and are not repeated herein.
Another object of the present invention is to provide a vehicle, which can save electric energy and increase the driving range while satisfying the heat dissipation requirement of the high-voltage accessory.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with the thermal management system of the vehicle high-voltage accessory.
Compared with the prior art, the vehicle and the thermal management system of the vehicle high-voltage accessory have the same advantages, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for thermal management of a high-voltage accessory of a vehicle according to an embodiment of the present invention;
FIG. 2 is a functional block diagram of a method for thermal management of a high-voltage vehicle accessory according to an embodiment of the present invention;
fig. 3 is a block diagram of a thermal management system for a high-voltage accessory of a vehicle according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention 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 of thermal management of a high-voltage accessory of a vehicle according to one embodiment of the present invention.
As shown in fig. 1, a thermal management method for a high-voltage accessory of a vehicle according to an embodiment of the present invention includes the steps of:
s1: the current temperature of the coolant in the cooling system of the vehicle is obtained. Wherein, cooling system includes water pump and fan.
In one embodiment of the present invention, the current temperature of the cooling fluid in the cooling system may be collected by providing a temperature sensor in the cooling system, and the temperature sensor transmits the collected temperature information to a control unit, such as a vehicle control unit, in real time.
S2: and judging whether the current temperature of the cooling liquid is greater than a first temperature threshold value.
Specifically, the first temperature threshold is used for judging whether a fan is started to radiate the high-voltage accessories of the vehicle, and the corresponding temperature threshold is set according to specific performance structure parameters of the vehicle.
S3: and if the current temperature of the cooling liquid is greater than the first temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the running rotating speed of the fan according to the current temperature of the cooling liquid.
Specifically, when the current temperature of the cooling liquid is greater than the first temperature threshold value, which indicates that the cooling requirement of the high-pressure accessory cannot be met by cooling with the water pump alone, the water pump and the fan are started to dissipate heat of the high-pressure accessory. When the high-voltage accessory is cooled, the running rotating speed of the fan is adjusted according to the current temperature of the cooling liquid so as to meet the cooling requirement of the high-voltage accessory, and the electric energy consumption of the battery is saved under the condition that the normal running of the high-voltage accessory is guaranteed, so that the cruising mileage of the vehicle is improved.
FIG. 2 is a functional block diagram of a method for thermal management of a high-voltage vehicle accessory in accordance with an embodiment of the present invention. In one embodiment of the present invention, as shown in fig. 2, the method for thermal management of a high voltage accessory for a vehicle further comprises:
S3A-1: and when the current temperature of the cooling liquid is less than or equal to a first temperature threshold value, acquiring the sum of the heating power of the high-voltage accessories of the vehicle.
In one embodiment of the invention, the high voltage accessory comprises a direct current power supply DCDC, a micro control unit MCU, a motor and an on board charger OBC. The vehicle control unit collects the power of the high-voltage accessories, and the power of each high-voltage accessory is multiplied by a corresponding coefficient through calibration, converted into heating power and summed.
S3A-2: and acquiring the duty ratio of the water pump corresponding to the sum of the heating power from a preset calibration table of the duty ratio of the water pump and the temperature of the cooling liquid.
In one embodiment of the present invention, the preset water pump duty ratio-coolant temperature calibration tables include a first preset water pump duty ratio-coolant temperature calibration table for providing a corresponding value between the heating power of the high-voltage accessory of the vehicle and the water pump duty ratio in the charging state, and a second preset water pump duty ratio-coolant temperature calibration table for providing a corresponding value between the heating power of the high-voltage accessory of the vehicle and the water pump duty ratio in the non-charging state.
Specifically, whether charging is carried out is divided into two calibration tables according to the working condition of the whole vehicle, namely that only DCDC and OBC exist when high-voltage parts work during charging of the vehicle, and the high-voltage parts do not have the OBC when the high-voltage parts do not work during charging. And the vehicle controller selects a corresponding water pump duty ratio-coolant temperature calibration table to control the duty ratio of the water pump according to whether the vehicle is in the charging process.
S3A-3: and controlling the running state of the water pump according to the duty ratio of the water pump corresponding to the sum of the heating power. In an example of the present invention, if the duty ratio of the water pump is set to be greater than the calibration threshold (e.g., 10%), the water pump enable flag is set to be 1, and the water pump enable flag is set to be 0. The period of the water pump duty cycle control signal is a fixed value (e.g., 10 ms).
In one embodiment of the present invention, the method of thermal management of a high voltage accessory for a vehicle further comprises:
S3B: and if the current temperature of the cooling liquid is greater than the second temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the fan to run at the maximum rotating speed. Wherein the second temperature threshold is greater than the first temperature threshold.
Specifically, the second temperature threshold is used to indicate that the temperature of the coolant is too high, the high-pressure accessory needs to be cooled to the maximum extent, the water pump is started at the maximum duty ratio, and the fan is controlled to run at the maximum rotating speed, so that the high-pressure accessory is cooled rapidly.
According to the heat management method of the vehicle high-voltage accessory, the running states of the water pump and the fan are controlled according to the heat dissipation requirement of the high-voltage accessory, excessive heat dissipation capacity is avoided, electric energy consumption is reduced, and the cruising mileage is improved.
FIG. 3 is a block diagram of a thermal management system for a high-voltage vehicle accessory, according to one embodiment of the present invention. As shown in fig. 3, a thermal management system for a high-voltage accessory of a vehicle according to an embodiment of the present invention includes: a coolant temperature acquisition module 310 and a control module 320.
The coolant temperature obtaining module 310 is configured to obtain a current temperature of a coolant in a cooling system of a vehicle, where the cooling system includes a water pump and a fan. The control module 320 is configured to determine whether the current temperature of the cooling fluid is greater than a first temperature threshold, and start the water pump at the maximum duty ratio when the current temperature of the cooling fluid is greater than the first temperature threshold, and control the operating speed of the fan according to the current temperature of the cooling fluid.
According to the thermal management system of the vehicle high-voltage accessory, the running states of the water pump and the fan are controlled according to the heat dissipation requirement of the high-voltage accessory, excessive heat dissipation capacity is avoided, electric energy consumption is reduced, and the cruising mileage is improved.
In an embodiment of the present invention, the control module 320 is further configured to obtain a sum of heating powers of high-voltage accessories of the vehicle when the current temperature of the coolant is less than or equal to the first temperature threshold, obtain a water pump duty ratio corresponding to the sum of the heating powers from a preset water pump duty ratio-coolant temperature calibration table, and further control the operation state of the water pump according to the water pump duty ratio corresponding to the sum of the heating powers.
In an embodiment of the present invention, the control module 320 is further configured to start the water pump at the maximum duty cycle and control the fan to operate at the maximum speed when the current temperature of the cooling fluid is greater than a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold.
In one embodiment of the present invention, the preset water pump duty ratio-coolant temperature calibration tables include a first preset water pump duty ratio-coolant temperature calibration table for providing a corresponding value between the heating power of the high-voltage accessory of the vehicle and the water pump duty ratio in the charging state, and a second preset water pump duty ratio-coolant temperature calibration table for providing a corresponding value between the heating power of the high-voltage accessory of the vehicle and the water pump duty ratio in the non-charging state.
In one embodiment of the invention, a high voltage accessory for a vehicle includes a DC power source, a micro control unit, a motor, and an on-board charger.
It should be noted that the specific implementation manner of the thermal management system for a vehicle high-voltage accessory according to the embodiment of the present invention is similar to the specific implementation manner of the thermal management method for a vehicle high-voltage accessory according to the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not repeated here in order to reduce redundancy.
Further, the embodiment of the invention discloses a vehicle, which is provided with the thermal management system of the vehicle high-voltage accessory in any one of the embodiments. The vehicle can save electric energy and improve the endurance mileage on the premise of meeting the heat dissipation requirement of the high-voltage accessory.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A method of thermal management of a high-voltage accessory for a vehicle, comprising the steps of:
acquiring the current temperature of a cooling liquid in a cooling system of a vehicle, wherein the cooling system comprises a water pump and a fan;
judging whether the current temperature of the cooling liquid is greater than a first temperature threshold value or not;
if the current temperature of the cooling liquid is greater than a first temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the running rotating speed of the fan according to the current temperature of the cooling liquid;
if the current temperature of the cooling liquid is smaller than or equal to the first temperature threshold value, acquiring the sum of the heating power of high-voltage accessories of the vehicle;
acquiring a water pump duty ratio corresponding to the sum of the heating power from a preset water pump duty ratio-coolant temperature calibration table, wherein the preset water pump duty ratio-coolant temperature calibration table comprises a first preset water pump duty ratio-coolant temperature calibration table and a second preset water pump duty ratio-coolant temperature calibration table, the first preset water pump duty ratio-coolant temperature calibration table is used for providing a corresponding value between the heating power sum of the high-voltage accessories of the vehicle in a charging state and the water pump duty ratio, and the second preset water pump duty ratio-coolant temperature calibration table is used for providing a corresponding value between the heating power sum of the high-voltage accessories of the vehicle in a non-charging state and the water pump duty ratio;
and controlling the running state of the water pump according to the duty ratio of the water pump corresponding to the sum of the heating power.
2. The method for thermally managing a high-voltage accessory for a vehicle of claim 1, further comprising:
if the current temperature of the cooling liquid is larger than a second temperature threshold value, starting the water pump at the maximum duty ratio, and controlling the fan to run at the maximum rotating speed;
wherein the second temperature threshold is greater than the first temperature threshold.
3. A thermal management system for a high-voltage accessory of a vehicle, comprising:
the cooling system comprises a cooling liquid temperature acquisition module, a cooling liquid temperature acquisition module and a control module, wherein the cooling liquid temperature acquisition module is used for acquiring the current temperature of cooling liquid in a cooling system of a vehicle, and the cooling system comprises a water pump and a fan;
a control module, configured to determine whether a current temperature of the coolant is greater than a first temperature threshold, start the water pump at a maximum duty ratio when the current temperature of the coolant is greater than the first temperature threshold, control an operating speed of the fan according to the current temperature of the coolant, obtain a sum of heating powers of high-pressure accessories of the vehicle when the current temperature of the coolant is less than or equal to the first temperature threshold, obtain a water pump duty ratio corresponding to the sum of the heating powers from a preset water pump duty ratio-coolant temperature calibration table, and control an operating state of the water pump according to the water pump duty ratio corresponding to the sum of the heating powers, where the preset water pump duty ratio-coolant temperature calibration table includes a first preset water pump duty ratio-coolant temperature calibration table and a second preset water pump duty ratio-coolant temperature calibration table, the first preset water pump duty ratio-coolant temperature calibration table is used for providing a corresponding value between the sum of the heating power of the high-voltage accessories of the vehicle in a charging state and the water pump duty ratio, and the second preset water pump duty ratio-coolant temperature calibration table is used for providing a corresponding value between the sum of the heating power of the high-voltage accessories of the vehicle in a non-charging state and the water pump duty ratio.
4. The thermal management system of a high-pressure vehicle accessory according to claim 3, wherein the control module is further configured to activate the water pump at a maximum duty cycle and control the fan to operate at a maximum speed when the current temperature of the coolant is greater than a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold.
5. The thermal management system for vehicle high voltage accessories according to claim 3, wherein said vehicle high voltage accessories include a DC power source, a micro control unit, an electric motor and an on-board charger.
6. A vehicle, characterized in that a thermal management system for a high-voltage accessory of a vehicle according to any one of claims 3-5 is provided.
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| CN201710114156.6A CN108501689B (en) | 2017-02-28 | 2017-02-28 | Thermal management method and system for vehicle high-voltage accessory and vehicle |
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| CN201710114156.6A CN108501689B (en) | 2017-02-28 | 2017-02-28 | Thermal management method and system for vehicle high-voltage accessory and vehicle |
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| CN108501689B true CN108501689B (en) | 2020-05-08 |
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| CN111376709B (en) * | 2018-12-28 | 2021-11-23 | 长城汽车股份有限公司 | Vehicle heat dissipation control method and system |
| CN111376710B (en) * | 2018-12-28 | 2021-11-26 | 长城汽车股份有限公司 | Vehicle heat dissipation control method and system |
| CN112277624B (en) * | 2019-07-26 | 2022-04-08 | 吉利汽车研究院（宁波）有限公司 | Vehicle thermal management control method, controller and system |
| CN110481308B (en) * | 2019-08-22 | 2022-06-07 | 重庆长安汽车股份有限公司 | Comprehensive cooling control method for driving motor of new energy vehicle |
| CN113623062B (en) * | 2020-05-06 | 2022-07-29 | 长城汽车股份有限公司 | Self-cleaning control method and device for engine thermal management module |
| CN113147365A (en) * | 2020-08-07 | 2021-07-23 | 长城汽车股份有限公司 | Cooling control method and device for vehicle, storage medium and electronic device |
| CN112498091B (en) * | 2020-12-09 | 2023-02-28 | 庆铃汽车（集团）有限公司 | Pure electric vehicle control method, terminal, medium and vehicle based on NEDC working condition |
| CN115023095A (en) * | 2021-03-03 | 2022-09-06 | 观致汽车有限公司 | Motor controller cooling method, storage medium, vehicle, and cooling device |
| CN114043841A (en) * | 2021-11-12 | 2022-02-15 | 上汽通用五菱汽车股份有限公司 | Automobile thermal management method and device and computer readable storage medium |
| CN114991934B (en) * | 2022-06-10 | 2024-02-06 | 上海源悦汽车电子股份有限公司 | Engine coolant temperature control method, system and readable storage module |
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