CN114216285A - Control method of temperature management system of vehicle and temperature management system - Google Patents
Control method of temperature management system of vehicle and temperature management system Download PDFInfo
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- CN114216285A CN114216285A CN202111437429.3A CN202111437429A CN114216285A CN 114216285 A CN114216285 A CN 114216285A CN 202111437429 A CN202111437429 A CN 202111437429A CN 114216285 A CN114216285 A CN 114216285A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000003507 refrigerant Substances 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000004069 differentiation Effects 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00492—Heating, cooling or ventilating [HVAC] devices comprising regenerative heating or cooling means, e.g. heat accumulators
- B60H1/00499—Heat or cold storage without phase change including solid bodies, e.g. batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the technical field of temperature management, and particularly provides a control method of a temperature management system of a vehicle and the temperature management system. Specifically, the temperature management system of the vehicle of the present invention includes an air conditioner, an auxiliary heat exchanger and a battery, both ends of the auxiliary heat exchanger are communicated with the air conditioner through a refrigerant pipeline, and the auxiliary heat exchanger is arranged in parallel with an evaporator of the air conditioner, which is arranged in a cab, the auxiliary heat exchanger is arranged near the battery so as to cool and/or heat the battery, an electric control valve is arranged on the refrigerant pipeline, the electric control valve is used for controlling the on-off state of the refrigerant pipeline, and the control method includes: acquiring the temperature of the battery; the electrically controlled valve is selectively opened and the air conditioner is operated according to the temperature. Through the arrangement, whether the temperature of the battery needs to be reduced and/or increased can be judged through the temperature of the battery, so that the temperature of the battery can be reduced and/or increased timely through the auxiliary heat exchanger, and the management effect of the temperature of the battery is improved.
Description
Technical Field
The invention relates to the technical field of temperature management, and particularly provides a control method of a temperature management system of a vehicle and the temperature management system.
Background
Global energy crisis is getting more and more serious, phenomena such as oil panic and gas shortage appear in many areas, and new energy automobiles must be vigorously developed to deal with the crisis, so that the occupation ratio of electric automobiles is getting higher and higher, and the core technology of the electric automobiles lies in battery capacity and service life.
If the long temperature of the battery is too low or too high, the output electric quantity of the battery can be influenced, and in addition, the battery is in a high-temperature or low-temperature working state for a long time, and the service life of the battery can be shortened. However, the temperature management system of the existing vehicle is not ideal in the effect of temperature management of the battery.
Therefore, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
The present invention is directed to solving or alleviating the above-mentioned technical problem, that is, solving or alleviating the problem that the effect of the existing temperature management system of a vehicle on the temperature management of a battery is not ideal.
In a first aspect, the present invention provides a control method for a temperature management system of a vehicle, where the temperature management system includes an air conditioner, an auxiliary heat exchanger, and a battery, the battery is electrically connected to an electrical appliance of the vehicle, two ends of the auxiliary heat exchanger are communicated with the air conditioner through a refrigerant pipeline, the auxiliary heat exchanger is arranged in parallel with an evaporator of the air conditioner, the evaporator is arranged in a cab, the auxiliary heat exchanger is arranged near the battery so as to cool and/or heat the battery, an electrically controlled valve is arranged on the refrigerant pipeline, and the electrically controlled valve is used to control on-off state of the refrigerant pipeline, and the control method includes: acquiring the temperature of the battery; and selectively opening the electric control valve and operating the air conditioner according to the temperature.
In a preferable embodiment of the control method of the vehicle temperature management system, the step of selectively opening the electric control valve and operating the air conditioner according to the temperature specifically includes: comparing the temperature with a first preset temperature; and if the temperature is higher than the first preset temperature, opening the electric control valve and enabling the air conditioner to operate in a cooling mode.
In a preferable embodiment of the control method of the temperature management system of the vehicle, the step of "selectively opening the electric control valve and operating the air conditioner according to the temperature" further includes: if the temperature is not greater than the first preset temperature, comparing the temperature with a second preset temperature; if the temperature is lower than the second preset temperature, opening the electric control valve and enabling the air conditioner to operate in a heating mode; wherein the second preset temperature is less than the first preset temperature.
In a preferable embodiment of the control method of the temperature management system of the vehicle, the step of "selectively opening the electric control valve and operating the air conditioner according to the temperature" further includes: and if the temperature is greater than or equal to the second preset temperature and less than or equal to the first preset temperature, not opening the electric control valve.
In a preferable aspect of the control method of a temperature management system of a vehicle described above, the control method further includes, at the same time as or after the step of "opening the electrically controlled valve", the step of: acquiring the current state of a compressor of the air conditioner; and if the current state of the compressor is in a stop state, starting the compressor to operate, and keeping a fan of the evaporator in the stop state.
In a preferable aspect of the control method of a temperature management system of a vehicle described above, after the step of "opening the electrically controlled valve" is performed, the control method further includes: and adjusting the opening of the electric control valve according to the temperature and the set target temperature.
In a preferable embodiment of the control method of the vehicle temperature management system, the step of "adjusting the opening degree of the electrically controlled valve according to the temperature and the set target temperature" includes: calculating a difference between the temperature and the set target temperature; and carrying out PID (proportion integration differentiation) regulation on the opening of the electric control valve according to the difference value.
In a preferable embodiment of the control method of the temperature management system for a vehicle, the temperature management system further includes a fan disposed near the battery.
In a preferable embodiment of the control method of the temperature management system of the vehicle, the fan is located between the auxiliary heat exchanger and the battery.
In a second aspect, the invention also provides a temperature management system comprising a controller configured to be able to perform the control method described above.
Under the condition of adopting the technical scheme, the temperature management system of the vehicle comprises an air conditioner, an auxiliary heat exchanger and a battery, wherein the battery is electrically connected with electrical appliances of the vehicle, two ends of the auxiliary heat exchanger are communicated with the air conditioner through a refrigerant pipeline, the auxiliary heat exchanger is arranged in parallel with an evaporator of the air conditioner, the evaporator is arranged in a cab, the auxiliary heat exchanger is arranged close to the battery so as to cool and/or heat the battery, an electric control valve is arranged on the refrigerant pipeline, and the electric control valve is used for controlling the on-off state of the refrigerant pipeline, and the control method comprises the following steps: acquiring the temperature of the battery; the electrically controlled valve is selectively opened and the air conditioner is operated according to the temperature. Through the arrangement, the auxiliary heat exchanger is communicated with an air conditioner of a vehicle and is arranged in parallel with an evaporator of the air conditioner, whether the temperature of the battery needs to be reduced and/or raised can be judged through the temperature of the battery, so that the temperature of the battery can be timely reduced and/or raised through the auxiliary heat exchanger, the management effect of the temperature of the battery is improved, for example, when the temperature of the battery is judged to be too high through the temperature of the battery, an electric control valve can be opened to connect the auxiliary heat exchanger into the air conditioner, and the air conditioner is enabled to operate in a cooling mode, and the temperature of the battery is reduced through the auxiliary heat exchanger; and/or when the temperature of the battery is judged to be too low through the temperature of the battery, the electric control valve can be opened so as to connect the auxiliary heat exchanger into the air conditioner, the air conditioner can be operated in a heating mode, and the temperature of the battery is increased through the auxiliary heat exchanger.
Further, simultaneously with or after the step of "opening the electrically controlled valve", the control method of the present invention further includes: acquiring the current state of a compressor of the air conditioner; and if the current state of the compressor is in a stop state, starting the compressor to operate, and keeping a fan of the evaporator in the stop state. Through such setting, cooling or the in-process that heaies up are carried out the battery through auxiliary heat exchanger, can avoid producing the influence to the temperature of the driver's cabin of vehicle to promote user's use and experience.
Still further, the step of "adjusting the opening of the electrically controlled valve according to the temperature and the set target temperature" specifically includes: calculating the difference between the temperature and the set temperature; and carrying out PID (proportion integration differentiation) adjustment on the opening of the electric control valve according to the difference value. Through such setting, can carry out more accurate regulation to the aperture of automatically controlled valve to further improve the control effect to the temperature of battery.
In addition, the temperature management system further provided by the invention based on the technical scheme has the technical effects of the control method due to the adoption of the control method, and compared with the temperature management system before improvement, the temperature management system of the vehicle can more effectively manage the temperature of the battery.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic block diagram of a vehicle temperature management system of the present invention;
FIG. 2 is a flow chart of a control method of the temperature management system of the vehicle of the present invention;
fig. 3 is a flowchart of an embodiment of a control method of a temperature management system of a vehicle of the present invention.
List of reference numerals:
1. a compressor; 2. a condenser; 3. an evaporator; 4. an auxiliary heat exchanger; 5. a battery; 6. a fan; 7. a four-way valve; 71. a first port; 72. a second port; 73. a third port; 74. a fourth port; 8. a gas-liquid separator; 91. a first refrigerant line; 92. a second refrigerant line; 93. a first pipeline; 94. a second pipeline; 101. an electrically controlled valve.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that in the description of the invention, although the steps of the temperature management system of the invention are described herein in a particular order, these orders are not limiting and those skilled in the art can perform the steps in a different order without departing from the basic principles of the invention. For example, the execution order of step S210 and step S220 of the control method of the present invention may also be interchanged with each other.
It should be noted that in the description of the present invention, the terms "top", "bottom", "left", "right", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The problem pointed out by the background art that the existing temperature management system of a vehicle is not ideal in the effect of temperature management of a battery. The invention provides a control method of a temperature management system of a vehicle and the temperature management system, and aims to reduce and/or raise the temperature of a battery through an air conditioner of the vehicle so as to improve the management effect of the temperature of the battery.
Referring first to fig. 1, wherein fig. 1 is a schematic view of a structure of a temperature management system of a vehicle of the present invention.
As shown in fig. 1, the temperature management system of a vehicle of the present invention includes an air conditioner, an auxiliary heat exchanger 4 and a battery 5, wherein the battery 5 is electrically connected to electrical equipment of the vehicle, two ends of the auxiliary heat exchanger 4 are communicated with the air conditioner through refrigerant pipelines (a first refrigerant pipeline 91 and a second refrigerant pipeline 92), the auxiliary heat exchanger 4 is arranged in parallel with an evaporator 3 of the air conditioner, the evaporator is arranged in a cab, the auxiliary heat exchanger 4 is arranged close to the battery 5 so as to cool and/or heat the battery 5, an electric control valve 101 is arranged on the refrigerant pipeline, and the electric control valve 101 is used for controlling the on-off state of the refrigerant pipeline.
By additionally providing an auxiliary heat exchanger 4 in the vicinity of the battery 5, the auxiliary heat exchanger 4 is communicated with the air conditioner of the vehicle, and the auxiliary heat exchanger 4 is provided in parallel with the evaporator 3 of the air conditioner.
When the air conditioner operates in a cooling mode, a high-temperature and high-pressure refrigerant discharged from a compressor 1 of the air conditioner flows through a condenser 2 of the air conditioner, is throttled by the condenser 2 and then is changed into a low-temperature and low-pressure gas-liquid two-phase state at a temperature of about 10 to 15 ℃, and then absorbs heat when flowing through an auxiliary heat exchanger 4, so that the temperature near the auxiliary heat exchanger 4 is reduced, and the temperature of a battery 5 is reduced.
When the air conditioner is operated in the heating mode, the high-temperature and high-pressure refrigerant discharged from the compressor 1 of the air conditioner releases heat while passing through the auxiliary heat exchanger 4, so that the temperature near the auxiliary heat exchanger 4 is increased, thereby warming the battery 5.
With such an arrangement, the temperature of the battery 5 can be raised while the temperature of the battery 5 is lowered by the additional auxiliary heat exchanger 4, and the effect of temperature management of the battery 5 by the temperature management system can be improved.
Illustratively, as shown in fig. 1, the air conditioner includes a compressor 1, a condenser 2, an evaporator 3, a four-way valve 7, and a gas-liquid separator 8, wherein an exhaust port of the compressor 1 communicates with a first port 71 of the four-way valve 7, a second port 72 of the four-way valve 7 communicates with a top end of the gas-liquid separator 8, and a bottom end of the gas-liquid separator 8 communicates with a return port of the compressor 1.
With reference to fig. 1, the left end of the condenser 2 is communicated with the third port 73 of the four-way valve 7, the right end of the condenser 2 is communicated with the top end of the evaporator 3 through a first pipeline 93, the bottom end of the evaporator 3 is communicated with the fourth port 74 of the four-way valve 7 through a second pipeline 94, the refrigerant pipelines include a first refrigerant pipeline 91 and a second refrigerant pipeline 92, the top end of the auxiliary heat exchanger 4 is communicated with the first pipeline 93 through the first refrigerant pipeline 91, the bottom end of the auxiliary heat exchanger 4 is communicated with the second pipeline 94 through the second refrigerant pipeline 92, and the electric control valve 101 is disposed on the first refrigerant pipeline 91 to control the on-off state of the first refrigerant pipeline 91.
When the air conditioner operates in a cooling mode, the first port 71 of the four-way valve 7 is communicated with the third port 73, the second port 72 of the four-way valve 7 is communicated with the fourth port 74, high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the condenser 2 along a pipeline, the refrigerant is throttled by the condenser 2 and then is changed into a low-temperature and low-pressure gas-liquid two-phase state, the refrigerant flowing out of the condenser 2 is divided into two paths, one path of refrigerant flows to the evaporator 3 arranged in the cab to cool the cab, the other path of refrigerant flows to the auxiliary heat exchanger 4, and when the refrigerant flows through the auxiliary heat exchanger 4, heat is absorbed, so that the temperature near the auxiliary heat exchanger 4 is reduced, and therefore the battery 5 is cooled.
When the air conditioner is operated in a heating mode, the first port 71 of the four-way valve 7 is communicated with the fourth port 74, the second port 72 of the four-way valve 7 is communicated with the third port 73, and the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the evaporator 3 and the auxiliary heat exchanger 4 along the pipeline, respectively, and releases heat while flowing through the auxiliary heat exchanger 4, so that the temperature near the auxiliary heat exchanger 4 is increased, thereby heating the battery 5.
It should be noted that, in practical applications, the temperature of the battery 5 may be selectively lowered only by the auxiliary heat exchanger 4, or the temperature of the battery 5 may also be selectively raised only by the auxiliary heat exchanger 4, and such flexible adjustment and change do not depart from the principle and scope of the present invention, and should be limited within the protection scope of the present invention. Of course, it is preferable that the temperature of the battery 5 is raised by the auxiliary heat exchanger 4 as well as the temperature of the battery 5 is lowered by the auxiliary heat exchanger 4.
It should be noted that, in practical applications, the electronic control valve 101 may be disposed on the second refrigerant line 92, or one electronic control valve 101 may be disposed on each of the first refrigerant line 91 and the second refrigerant line 92, and such adjustment and change of the specific disposition position of the electronic control valve 101 do not depart from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.
In addition, it should be noted that the air conditioner, that is, the existing air conditioner, may further include some commonly-installed essential elements of the existing air conditioner, such as an electronic expansion valve, besides the compressor 1, the condenser 2, the evaporator 3, the four-way valve 7 and the gas-liquid separator 8, and thus, the details thereof are not repeated herein.
Preferably, as shown in fig. 1, the temperature management system of the present invention further includes a fan 6, and the fan 6 is disposed adjacent to the battery 5. Through setting up fan 6, more be favorable to cooling down battery 5.
It should be noted that, in practical applications, the fan 6 may be disposed between the auxiliary heat exchanger 4 and the battery 5, or the auxiliary heat exchanger 4 may also be disposed between the fan 6 and the battery 5, and such adjustment and change of the specific disposition position of the fan 6 do not depart from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.
Preferably, as shown in fig. 1, the fan 6 is located between the auxiliary heat exchanger 4 and the battery 5.
Based on the above vehicle temperature management system, the present invention further provides a control method of the temperature management system, as shown in fig. 2, the control method of the present invention includes the following steps:
s100: acquiring the temperature of the battery;
s200: the electrically controlled valve is selectively opened and the air conditioner is operated according to the temperature.
Illustratively, a temperature sensor is arranged on the battery, the temperature sensor can detect the temperature of the battery, and the temperature sensor is in communication connection with the controller of the temperature management system so as to transmit the data detected by the temperature sensor to the controller.
The controller can control the components, for example, the controller can control the start and stop of the compressor, can control the opening and closing of the electric control valve, can control the start and stop of the fan, and the like.
After receiving the temperature data transmitted by the temperature sensor, the controller can judge whether the temperature of the battery needs to be reduced and/or increased according to the temperature, judge whether the electric control valve needs to be opened according to the judgment result, and simultaneously open the electric control valve, the air conditioner needs to be operated so as to reduce the temperature of the battery and/or increase the temperature of the battery through the auxiliary heat exchanger.
It should be noted that a temperature interval (for example, 15 to 35 degrees) may be set for the temperature of the battery, and when the temperature of the battery is higher than the temperature interval, the temperature of the battery is lowered, and when the temperature of the battery is lower than the temperature interval, the temperature of the battery is raised; alternatively, a preset temperature may be set for the temperature of the battery, the difference between the temperature of the battery and the preset temperature is calculated, and then whether the temperature of the battery needs to be decreased and/or increased is determined according to the difference, and the like.
The technical solution of the present invention will be described in detail with reference to a specific embodiment.
As shown in fig. 3, the control method of the present invention includes the steps of:
s100: the temperature of the battery is acquired.
For example, during the operation of the vehicle, the temperature of the battery may be detected by a temperature sensor provided on the battery, and after the controller acquires the temperature of the battery, the electrically controlled valve is selectively opened and the air conditioner is operated according to the temperature. The step of "selectively opening the electrically controlled valve and operating the air conditioner according to the temperature" specifically includes steps S210 to S240.
S210: and judging whether the temperature of the battery is greater than a first preset temperature or not.
The controller is internally pre-stored with a specific value of a first preset temperature, and after the temperature of the battery is obtained, the controller compares the temperature of the battery with the first preset temperature to judge whether the temperature of the battery is greater than the first preset temperature.
If the determination result is negative, that is, the temperature of the battery is not greater than the first preset temperature, which indicates that the temperature of the battery is not high, step S220 is executed next.
On the contrary, if the determination result is yes, that is, the temperature of the battery is greater than the first preset temperature, which indicates that the temperature of the battery is too high, step S230 is executed, that is, the electronic control valve is controlled to be opened, and the air conditioner is controlled to operate in the cooling mode, so that the temperature of the battery is reduced by the auxiliary heat exchanger.
Illustratively, the first preset temperature is set to 35 degrees, and when the temperature of the battery is greater than 35 degrees, it indicates that the temperature of the battery is too high, and the temperature reduction treatment needs to be performed on the battery.
It should be noted that the data of the first preset temperature is not limited to the above 35 degrees, for example, the first preset temperature may also be set to 30 degrees or 40 degrees, and a person skilled in the art may flexibly set a specific value of the first preset temperature according to experiments or experience in practical applications.
S220: and judging whether the temperature of the battery is lower than a second preset temperature or not.
The controller is also internally prestored with a specific numerical value of a second preset temperature, and after the controller judges that the temperature of the battery is not more than the first preset temperature, the controller compares the temperature of the battery with the second preset temperature to judge whether the temperature of the battery is less than the second preset temperature, wherein the second preset temperature is less than the first preset temperature.
If the temperature of the battery is less than the second preset temperature, which indicates that the temperature of the battery is too low, step S240 is performed, in which the electrically controlled valve is controlled to be opened, and the air conditioner is controlled to operate in the heating mode, so as to increase the temperature of the battery through the auxiliary heat exchanger.
Illustratively, the second preset temperature is set to 15 degrees, and when the temperature of the battery is less than 15 degrees, it indicates that the temperature of the battery is too low, and the temperature rise processing needs to be performed on the battery.
It should be noted that the data of the second preset temperature is not limited to the above 15 degrees, for example, the second preset temperature may also be set to 10 degrees or 20 degrees, and a person skilled in the art may flexibly set a specific value of the second preset temperature according to experiments or experience in practical applications.
In addition, it should be noted that if the temperature of the battery is not less than the second preset temperature, it indicates that the temperature of the battery is neither high nor low, and in this case, the electrically controlled valve may not be opened.
In addition, it should be noted that, in practical applications, step S220 may be executed first, and then step S210 is executed, that is, after the temperature of the battery is obtained, the temperature of the battery is compared with the second preset temperature, whether the temperature of the battery is smaller than the second preset temperature is determined, and when the temperature of the battery is not smaller than the second preset temperature, the temperature of the battery is compared with the first preset temperature, and whether the temperature of the battery is greater than the first preset temperature is determined.
S230: the electrically controlled valve is opened and the air conditioner is operated in a cooling mode.
When the controller judges that the temperature of the battery is too high according to the temperature of the battery, the compressor of the air conditioner is controlled to be started, the air conditioner is enabled to operate in a refrigeration mode, high-temperature and high-pressure refrigerant discharged by the compressor flows into the condenser along the pipeline, the refrigerant is throttled from the condenser and then becomes a low-temperature and low-pressure gas-liquid two-phase state, the refrigerant flowing out of the condenser absorbs heat when flowing through the auxiliary heat exchanger, the temperature near the auxiliary heat exchanger is reduced, and at the moment, the fan can also be controlled to operate to blow low-temperature air near the auxiliary heat exchanger to the battery, so that the battery is cooled more effectively.
S240: the electrically controlled valve is opened and the air conditioner is operated in a heating mode.
When the controller judges that the temperature of the battery is too low according to the temperature of the battery, the controller controls the compressor of the air conditioner to be started, the air conditioner is enabled to operate in a heating mode, high-temperature and high-pressure refrigerant discharged by the compressor flows into the auxiliary heat exchanger along the pipeline, heat is released when the refrigerant flows through the auxiliary heat exchanger, the temperature near the auxiliary heat exchanger is increased, the fan can be controlled to operate at the moment, high-temperature air near the auxiliary heat exchanger is blown to the battery, and therefore the temperature of the battery is effectively increased.
It should be noted that, in practical applications, if the battery is cooled only by the auxiliary heat exchanger, the setting of the second preset temperature may be cancelled, after the temperature of the battery is obtained, the temperature of the battery is only compared with the first preset temperature, and if the temperature of the battery is not greater than the first preset temperature, the electronic control valve is not opened.
Similarly, if the battery is heated only by the auxiliary heat exchanger, the setting of the first preset temperature may be cancelled, and after the temperature of the battery is obtained, the temperature of the battery is only compared with the second preset temperature, and if the temperature of the battery is not less than the second preset temperature, the electrically controlled valve is not opened.
Of course, it is preferable to raise the temperature of the battery as well as lower the temperature by the auxiliary heat exchanger.
Preferably, the control method of the present invention further comprises, at the same time as or after the step of "opening the electrically controlled valve", the step of: acquiring the current state of a compressor of the air conditioner; and if the current state of the compressor is in a stop state, starting the compressor to operate, and keeping a fan of the evaporator in the stop state.
When the temperature of the battery is judged to be too high and/or too low, the electric control valve needs to be opened to connect the auxiliary heat exchanger into the air conditioner, the temperature of the battery is reduced or improved through the auxiliary heat exchanger, the current state of a compressor of the air conditioner is firstly obtained while or after the electric control valve is opened, and if the compressor is just in the running state, the compressor is kept running continuously.
On the contrary, if the compressor is in a stop state, the compressor is controlled to start and operate, and meanwhile, the fan of the evaporator needs to be kept in a stop state, namely, the fan of the evaporator is not started. Through such setting, can avoid producing the influence to the temperature of the driver's cabin of vehicle to promote user's use and experience.
Preferably, after the step of "opening the electrically controlled valve" is performed, the control method of the present invention further includes: and adjusting the opening of the electric control valve according to the temperature and the set target temperature.
And in the process of cooling and/or heating the battery through the auxiliary heat exchanger, continuously detecting the temperature of the battery, and adjusting the opening of the electric control valve according to the temperature of the battery and the set target temperature.
It should be noted that the opening degree of the electronic control valve may be adjusted according to the magnitude of the difference between the temperature of the battery and the set target temperature, for example, if the difference between the temperature of the battery and the set target temperature is large, the opening degree of the electronic control valve is increased, whereas if the difference between the temperature of the battery and the set target temperature is small, the opening degree of the electronic control valve is decreased; alternatively, the opening degree of the electrically controlled valve may be adjusted according to the ratio between the temperature of the battery and the set target temperature, and the like, and such flexible adjustment and change do not depart from the principle and scope of the present invention, and should be limited within the scope of the present invention.
Preferably, the step of "adjusting the opening degree of the electrically controlled valve according to the temperature and the set target temperature" specifically includes: calculating the difference between the temperature and the set temperature; and performing PID (proportion Integration differentiation) regulation on the opening of the electric control valve according to the difference value.
Through the arrangement, the opening of the electric control valve can be dynamically, quickly and accurately adjusted, the problem of overshoot or overshoot of the electric control valve is prevented, and therefore the temperature of the battery can be effectively managed.
Illustratively, a calculating unit and a PID adjusting unit are connected in the controller, the calculating unit can calculate the difference between the temperature of the battery and the set target temperature, and the PID adjusting unit can perform PID adjustment on the opening of the electric control valve according to the difference between the temperature of the battery and the set target temperature.
It should be noted that the electronic control valve is preferably a solenoid valve or an electronic expansion valve.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of a temperature management system of a vehicle is characterized in that the temperature management system comprises an air conditioner, an auxiliary heat exchanger and a battery, the battery is electrically connected with electrical equipment of the vehicle, two ends of the auxiliary heat exchanger are communicated with the air conditioner through refrigerant pipelines, the auxiliary heat exchanger is arranged in parallel with an evaporator of the air conditioner, the evaporator is arranged in a cab, the auxiliary heat exchanger is arranged close to the battery so as to cool and/or heat the battery, an electric control valve is arranged on the refrigerant pipelines and used for controlling the on-off state of the refrigerant pipelines, and the control method comprises the following steps:
acquiring the temperature of the battery;
and selectively opening the electric control valve and operating the air conditioner according to the temperature.
2. The control method according to claim 1, wherein the step of selectively opening the electrically controlled valve and operating the air conditioner according to the temperature specifically includes:
comparing the temperature with a first preset temperature;
and if the temperature is higher than the first preset temperature, opening the electric control valve and enabling the air conditioner to operate in a cooling mode.
3. The control method according to claim 2, wherein the step of selectively opening the electrically controlled valve and operating the air conditioner according to the temperature further comprises:
if the temperature is not greater than the first preset temperature, comparing the temperature with a second preset temperature;
if the temperature is lower than the second preset temperature, opening the electric control valve and enabling the air conditioner to operate in a heating mode;
wherein the second preset temperature is less than the first preset temperature.
4. The control method according to claim 3, wherein the step of selectively opening the electrically controlled valve and operating the air conditioner according to the temperature further comprises:
and if the temperature is greater than or equal to the second preset temperature and less than or equal to the first preset temperature, not opening the electric control valve.
5. The control method according to claim 1, wherein, simultaneously with or after the step of "opening the electrically controlled valve", the control method further comprises:
acquiring the current state of a compressor of the air conditioner;
and if the current state of the compressor is in a stop state, starting the compressor to operate, and keeping a fan of the evaporator in the stop state.
6. The control method according to claim 1, characterized in that after the step of "opening the electrically controlled valve" is performed, the control method further comprises:
and adjusting the opening of the electric control valve according to the temperature and the set target temperature.
7. The control method according to claim 6, wherein the step of "adjusting the opening degree of the electrically controlled valve in accordance with the temperature and the set target temperature" specifically includes:
calculating a difference between the temperature and the set target temperature;
and carrying out PID (proportion integration differentiation) regulation on the opening of the electric control valve according to the difference value.
8. The control method according to any one of claims 1 to 7, wherein the temperature management system further includes a fan disposed near the battery.
9. The control method according to claim 8, wherein the fan is located between the auxiliary heat exchanger and the battery.
10. A temperature management system comprising a controller, characterized in that the controller is configured to be able to perform the control method of any of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111437429.3A CN114216285A (en) | 2021-11-29 | 2021-11-29 | Control method of temperature management system of vehicle and temperature management system |
| PCT/CN2022/099211 WO2023093003A1 (en) | 2021-11-29 | 2022-06-16 | Control method for temperature management system of vehicle, and temperature management system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111437429.3A CN114216285A (en) | 2021-11-29 | 2021-11-29 | Control method of temperature management system of vehicle and temperature management system |
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| CN202111437429.3A Pending CN114216285A (en) | 2021-11-29 | 2021-11-29 | Control method of temperature management system of vehicle and temperature management system |
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| WO (1) | WO2023093003A1 (en) |
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| WO2023093003A1 (en) * | 2021-11-29 | 2023-06-01 | 青岛海尔空调器有限总公司 | Control method for temperature management system of vehicle, and temperature management system |
| CN115782532B (en) * | 2022-11-28 | 2024-06-04 | 重庆长安汽车股份有限公司 | Control method and system for electric compressor, electronic equipment and storage medium |
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Application publication date: 20220322 |