CN110774860A - Control method of electric automobile thermal management system and electric automobile - Google Patents

Control method of electric automobile thermal management system and electric automobile Download PDF

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Publication number
CN110774860A
CN110774860A CN201911010183.4A CN201911010183A CN110774860A CN 110774860 A CN110774860 A CN 110774860A CN 201911010183 A CN201911010183 A CN 201911010183A CN 110774860 A CN110774860 A CN 110774860A
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China
Prior art keywords
battery
air
cooling
evaporator
electric automobile
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CN201911010183.4A
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Chinese (zh)
Inventor
王金龙
付永健
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Guangzhou Xiaopeng Motors Technology Co Ltd
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Guangzhou Xiaopeng Motors Technology Co Ltd
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Priority to CN201911010183.4A priority Critical patent/CN110774860A/en
Publication of CN110774860A publication Critical patent/CN110774860A/en
Pending legal-status Critical Current

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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
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3207—Control means therefor for minimizing the humidity of the air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The embodiment of the invention provides a control method of a thermal management system of an electric automobile, which comprises the following steps: controlling an air conditioning loop of the electric automobile to start a refrigeration mode so as to dehumidify air in an air duct of the electric automobile; acquiring the battery temperature of the electric automobile, and judging whether the battery temperature is in a preset temperature range or not; and if so, distributing a part of the refrigerating capacity generated by the compressor in the air conditioning loop for cooling the battery. The embodiment of the invention saves the energy consumption of heat compensation on one hand, and can cool the battery of the electric automobile in advance on the other hand.

Description

Control method of electric automobile thermal management system and electric automobile
Technical Field
The invention relates to the field of automobiles, in particular to a control method of an electric automobile thermal management system and an electric automobile.
Background
As is well known, the endurance mileage of the electric automobile is a key point of attention of consumers at present, and the proportion of the energy consumption of an air conditioning system of the electric automobile in the energy consumption of the whole automobile can reach more than 20% -30%, so that how to effectively control the energy conservation of the air conditioner of the electric automobile is very important for reducing the energy consumption. When heating, the traditional fuel oil automobile can utilize the waste heat of the engine during heating, and the energy consumption is not additionally increased; the electric automobile needs to adopt an additional heating device, and the electric quantity of a power battery needs to be consumed during working.
When weather humidity is great, in order to improve the travelling comfort, the electric automobile wind channel needs to be dehumidified, if dehumidify with air conditioner refrigeration, can reduce the air temperature in wind channel, need carry out the concurrent heating with the air in other heating device to the wind channel, like this, has wasted the refrigerating output of air conditioner, has also increased heating device's energy consumption.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are provided to provide a control method of a thermal management system of an electric vehicle and an electric vehicle, which overcome or at least partially solve the above problems.
In order to solve the above problems, an embodiment of the present invention discloses a control method for a thermal management system of an electric vehicle, including:
controlling an air conditioning loop of the electric automobile to start a refrigeration mode so as to dehumidify air in an air duct of the electric automobile;
acquiring the battery temperature of the electric automobile, and judging whether the battery temperature is in a preset temperature range or not;
and if so, distributing a part of the refrigerating capacity generated by the compressor in the air conditioning loop for cooling the battery.
Optionally, the air conditioning circuit at least includes a compressor and an evaporator, and the evaporator is used for dehumidifying air in the air duct when the air conditioning circuit starts a cooling mode;
the step of allocating a portion of the cooling capacity in the air conditioning circuit for cooling the battery comprises:
a cooling capacity Q for cooling the battery Chiller＝Q com-Q EVAPWherein Q is comFor the refrigerating capacity, Q, produced by the compressor EVAPThe refrigerating capacity required for the evaporator to dehumidify the air in the air duct.
Optionally, the required cooling capacity Q of the evaporator EVAP＝CM(T in-T out) Where C is the specific heat capacity of the air, M is the mass of air flowing through the evaporator, and T inFor the inlet air temperature, T, of the evaporator outThe outlet air temperature of the evaporator.
Optionally, the mass M of air flowing through the evaporator is ρ × s × t, where ρ is the air density, s is the volume flow rate of a blower, and t is the blower operating time, the blower being provided in the air duct and configured to guide air to the evaporator.
Optionally, the controlling the air conditioning circuit of the electric vehicle to start the cooling mode to dehumidify air in the air duct of the electric vehicle further includes:
and controlling the compressor to operate according to the lowest allowable rotating speed.
Optionally, the electric vehicle thermal management system comprises a battery cooling circuit and a battery cooler;
the step of distributing a portion of the cooling capacity generated by the compressor in the air conditioning circuit for cooling the battery includes:
and distributing a part of refrigerating capacity generated by a compressor in the air conditioning loop to the battery cooler, wherein the battery cooler is arranged in the battery cooling loop and is used for cooling the battery cooling loop, and the battery cooling loop is used for cooling the battery.
Optionally, the battery cooler has a first heat exchange channel and a second heat exchange channel, the second heat exchange channel is connected to the battery cooling circuit, the branch where the first heat exchange channel is located is connected in parallel with the evaporator, and a throttle valve is disposed on the branch where the first heat exchange channel is located, and the throttle valve is used for adjusting the refrigerating capacity passing through the first heat exchange channel.
The embodiment of the invention also discloses an electric automobile, which comprises:
one or more processors; and
one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the electric vehicle to perform one or more methods as described above.
Embodiments of the invention also include one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause the processors to perform one or more methods as described above.
The embodiment of the invention has the following advantages:
the embodiment of the invention saves the energy consumption of heat compensation on one hand, and can cool the battery of the electric automobile in advance on the other hand.
Drawings
FIG. 1 is a schematic structural view of the interior of an air duct according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a thermal management system of at least a portion of an embodiment of the present invention;
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the air duct 15 according to the embodiment of the present invention is used to heat-treat air and discharge the heat-treated air into the vehicle.
As one embodiment, the air duct 15 includes a first air inlet communicated with the inside of the vehicle and a second air inlet communicated with the outside of the vehicle, and the number of the first air inlet and the second air inlet may be one or more; in one embodiment, the air duct 15 includes at least one air outlet 151 communicating with the vehicle interior.
When the air in the air duct needs to be dehumidified, the air in the air duct can be dehumidified in a refrigerating mode by adopting the air conditioning loop.
It should be understood that the air conditioning circuit in the embodiment should be capable of performing a cooling function, and may be one of the air conditioning circuits in the prior art.
As one embodiment, the air conditioning circuit at least includes a compressor and an evaporator, as shown in fig. 1, the evaporator 12 may be disposed in the air duct 15, and when the air conditioning circuit starts a cooling mode, the evaporator 12 is used to dehumidify air in the air duct 15, specifically, the evaporator 12 may cool the air in the air duct 15, so as to achieve a dehumidification effect; as an embodiment, the air may be dehumidified by guiding the air to the evaporator 12 by the blower 14 provided in the wind tunnel 15.
However, the cooling capacity of the air conditioner of the electric vehicle is wasted, and the temperature of the air in the air duct is lower after dehumidification, so that heat compensation needs to be performed on the air in the air duct, and the heat compensation energy consumption is relatively increased.
The specific heat capacity of the battery of the electric automobile is large, so that after part of refrigerating capacity is absorbed, large temperature change cannot be generated, and the battery of the electric automobile can bear the temperature change caused by the refrigerating capacity in a certain temperature interval; furthermore, the air conditioning circuit generally does not require as much cooling capacity when dehumidifying; therefore, part of the cooling capacity generated by the compressor in the air conditioning loop can be used for cooling the battery, and the cooling method has the advantages that on one hand, the energy consumption of heat compensation is saved, and on the other hand, the battery of the electric automobile can be cooled in advance.
In one embodiment, a portion of the cooling capacity generated by the compressor in the air conditioning circuit is distributed to the battery cooler, the battery cooler is disposed in the battery cooling circuit and is configured to cool the battery cooling circuit, and the battery cooling circuit is configured to cool the battery. Furthermore, the battery cooler is connected in parallel with the evaporator in the air conditioning loop, and the refrigerating capacity passing through the battery cooler is adjusted through a valve body.
As an embodiment, as shown in fig. 2, a thermal management system illustrating at least a part of an embodiment of the present invention includes an air conditioning circuit 2 and a battery cooling circuit 8, a battery 7 of an electric vehicle may be cooled by the battery cooling circuit 8, and heat exchange is performed between the battery cooling circuit 8 and the air conditioning circuit 2 by a battery cooler 11, so that a part of cooling capacity generated by a compressor 1 in the air conditioning circuit 2 may be transmitted to the battery cooler 11, the battery cooling circuit 8 is cooled by the battery cooler 11, and the battery 7 of the electric vehicle is cooled by the battery cooling circuit 8.
As one of the embodiments, the air-conditioning circuit 2 includes a compressor 1, a condenser 4, an expansion valve 5, and an evaporator 12 connected in this order; the battery cooling loop 8 comprises a water pump 9, a battery 7 and an expansion kettle 10 which are connected in sequence; the battery cooler 11 has a first heat exchange channel and a second heat exchange channel, the second heat exchange channel is connected to the battery cooling circuit 8, a branch where the first heat exchange channel is located is connected in parallel with the evaporator 12, a throttle valve 6 is arranged on the branch where the first heat exchange channel is located, the throttle valve 6 is used for adjusting the refrigerating capacity passing through the first heat exchange channel, and specifically, the throttle valve 6 may be an electronic expansion valve.
As one embodiment, as shown in fig. 1, the air cooled and dehumidified by the air conditioning loop in the air duct may be heated by the heating device, so as to achieve the effect of heat compensation; the heating device 13 may be a warm air core, and the warm air core is heated by a water heating loop, specifically, a water heater and a water pump may be disposed in the water heating loop, the water heater is used to heat water in the water heating loop, and the water pump is used to forcibly circulate, so as to heat the warm air core, so that the warm air core can heat air in the air duct 15, wherein the water heater may be a PTC liquid heater; of course, the heating device 13 may also be another component, such as a PTC air heater, so that the PTC air heater is not needed to heat the air in the air duct 15.
The embodiment of the invention relates to a control method of a thermal management system, which comprises the following steps:
s1, controlling an air conditioning loop of the electric automobile to start a refrigeration mode so as to dehumidify air in an air duct of the electric automobile;
the air conditioning loop in the embodiment can realize a refrigeration function, and can be one of the air conditioning loops in the prior art.
In one embodiment, the compressor is controlled to operate at the lowest permissible speed. Because the air conditioning loop needs less refrigerating capacity during dehumidification, the rotating speed of the compressor is preferentially adjusted to achieve the energy-saving comfortable effect when the rotating speed of the compressor is higher.
In one embodiment, the air conditioning circuit includes a compressor, a condenser, an expansion valve, and an evaporator connected in series.
S2, acquiring the battery temperature of the electric automobile, and judging whether the battery temperature is in a preset temperature range;
because the specific heat capacity of the battery of the electric automobile is large, after the battery absorbs part of the refrigerating capacity, large temperature change cannot be generated, and the battery of the electric automobile can bear the temperature change caused by the refrigerating capacity within a certain temperature interval.
The BATTERY temperature may be obtained in various manners or, for example, may be obtained by a temperature sensor, or may be obtained by a BMS (BATTERY management system ).
The preset temperature interval of the battery can be set according to one or more of performance parameters of the battery, materials of a battery shell, the type of the battery and performance parameters of the water cooling plate, wherein the water cooling plate is arranged on the outer surface of the battery and used for realizing heat exchange between the battery and a battery cooling loop. In one embodiment, the battery temperature range is [ T ] batterymin，T batterymax]Wherein T is batteryminIs the lowest temperature, T, of the battery batterymaxIs the highest temperature of the cell; as an embodiment, T batteryminMore than or equal to T1, wherein the temperature of T1 is more than or equal to minus 30 ℃ and less than or equal to 0 ℃, and the temperature of T batterymax≤T2，5℃≤T2≤45℃。
And S3, if yes, distributing a part of the refrigerating capacity generated by the compressor in the air conditioning loop for cooling the battery.
In a certain temperature interval, the battery of the electric automobile can bear the temperature change caused by refrigerating capacity; furthermore, the air conditioning circuit generally does not require as much cooling capacity when dehumidifying; therefore, part of the cooling capacity generated by the compressor in the air conditioning loop can be used for cooling the battery, and the energy consumption of the heating device is saved on the one hand, and the battery of the electric automobile can be cooled in advance on the other hand.
As one of the embodiments, the cooling capacity for cooling the battery is Q Chiller＝Q com-Q EVAPWherein Q is comFor the refrigerating capacity, Q, produced by the compressor EVAPThe refrigerating capacity required for the evaporator to dehumidify the air in the air duct. In the air conditionerIn the circuit, the compressor generates the refrigerating capacity, and the part consuming the refrigerating capacity is the evaporator, so when the air conditioning loop dehumidifies, the refrigerating capacity required by the evaporator is removed, and the residual refrigerating capacity can be used for cooling the battery.
As one of the embodiments, the refrigerating capacity Q required by the evaporator EVAP＝CM(T in-T out) Where C is the specific heat capacity of the air, M is the mass of air flowing through the evaporator, and T inFor the inlet air temperature, T, of the evaporator outThe outlet air temperature of the evaporator. Wherein, T inAnd T outThere are several methods of acquisition, for example, it can be obtained by a temperature sensor; or, by calculation, T being one of the calculation means in＝K1×T ambient+K2×T cabinWherein K1 is the external circulation opening proportional coefficient, K2 is the internal circulation opening proportional coefficient (0)<K1<1,0<K2<1, K1+ K2 is 1), wherein K1 is determined according to the opening degree of a second air inlet of the air duct 15 communicated with the outside of the vehicle, K2 is determined according to the opening degree of a first air inlet of the air duct 15 communicated with the inside of the vehicle, and T out＝T dpWherein, T dpFor air at temperature T inAnd dew point temperature at the current humidity.
In one embodiment, the mass M of the air flowing through the evaporator is ρ × s × t, where ρ is the air density, s is the volume flow of a blower, and t is the blower operating time, the blower being provided in the air duct and serving to guide the air to the evaporator.
According to the control method of the thermal management system, when the temperature of the battery is in the preset temperature range, a part of refrigerating capacity generated by the compressor in the air conditioning loop is distributed to cool the battery, so that the power consumption saved by the heating device is Q save1＝Q ChilleAnd, since the battery is cooled in advance, it is helpful to reduce the cooling capacity consumed for cooling the battery, and the power consumption Q of the compressor for cooling the battery can be saved save2＝α×Q chillerWherein α represents the probability coefficient of battery cooling requirement during operation (α)<1) Then, the energy-saving effect is as follows: q save＝Q save1+Q save2＝Q chiller+α×Q chiller＝(1+α)×Q chille。
In one embodiment, a portion of the cooling capacity generated by the compressor in the air conditioning circuit is distributed to the battery cooler, the battery cooler is disposed in the battery cooling circuit and is configured to cool the battery, and the battery cooling circuit is configured to cool the battery. Specifically, the battery of the electric automobile can be cooled through the battery cooling loop, and heat exchange is carried out between the battery cooling loop and the air conditioning loop through the battery cooler, so that part of refrigerating capacity generated by the compressor in the air conditioning loop can be conveyed to the battery cooler, the battery cooling loop is cooled through the battery cooler, and then the battery of the electric automobile is cooled through the battery cooling loop.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
An embodiment of the present invention further provides an electric vehicle, including:
one or more processors; and
one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the electric vehicle to perform a method according to embodiments of the invention.
Embodiments of the invention also provide one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause the processors to perform the methods described in embodiments of the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, EEPROM, Flash, eMMC, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

Claims (9)

1. A control method of an electric vehicle thermal management system is characterized by comprising the following steps:
controlling an air conditioning loop of the electric automobile to start a refrigeration mode so as to dehumidify air in an air duct of the electric automobile;
acquiring the battery temperature of the electric automobile, and judging whether the battery temperature is in a preset temperature range or not;
and if so, distributing a part of the refrigerating capacity in the air conditioning loop for cooling the battery.
2. The method of claim 1, wherein the air conditioning circuit includes at least a compressor and an evaporator for dehumidifying air of the duct when the air conditioning circuit is turned on in the cooling mode;
the step of allocating a portion of the cooling capacity in the air conditioning circuit for cooling the battery comprises:
a cooling capacity Q for cooling the battery Chiller＝Q com-Q EVAPWherein Q is comFor the refrigerating capacity, Q, produced by the compressor EVAPThe refrigerating capacity required for the evaporator to dehumidify the air in the air duct.
3. Method according to claim 2, characterized in that the refrigeration capacity Q required by the evaporator is EVAP＝CM(T in-T out) Where C is the specific heat capacity of the air, M is the mass of air flowing through the evaporator, and T inFor the inlet air temperature, T, of the evaporator outThe outlet air temperature of the evaporator.
4. The method of claim 3, wherein the mass M of air flowing through the evaporator is ρ × s × t, where ρ is the air density, s is the volumetric flow rate of a blower, and t is the blower operating time, the blower being disposed in the duct and configured to direct air to the evaporator.
5. The method of claim 1, wherein the controlling the air conditioning circuit of the electric vehicle to initiate a cooling mode to dehumidify air in a duct of the electric vehicle further comprises:
and controlling the compressor to operate according to the lowest allowable rotating speed.
6. The method of claim 2, wherein the electric vehicle thermal management system comprises a battery cooling circuit and a battery cooler;
the step of distributing a portion of the cooling capacity generated by the compressor in the air conditioning circuit for cooling the battery includes:
and distributing a part of refrigerating capacity generated by a compressor in the air conditioning loop to the battery cooler, wherein the battery cooler is arranged in the battery cooling loop and is used for cooling the battery cooling loop, and the battery cooling loop is used for cooling the battery.
7. The method of claim 6,
the battery cooler is provided with a first heat exchange channel and a second heat exchange channel, the second heat exchange channel is connected into the battery cooling loop, a branch where the first heat exchange channel is located is connected with the evaporator in parallel, a throttling valve is arranged on the branch where the first heat exchange channel is located, and the throttling valve is used for adjusting the refrigerating capacity passing through the first heat exchange channel.
8. An electric vehicle, comprising:
one or more processors; and
one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the electric vehicle to perform the method of one or more of claims 1-8.
9. One or more machine readable media having instructions stored thereon that, when executed by one or more processors, cause the processors to perform the method of one or more of claims 1-8.
CN201911010183.4A 2019-10-23 2019-10-23 Control method of electric automobile thermal management system and electric automobile Pending CN110774860A (en)

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WO2023070606A1 (en) * 2021-10-29 2023-05-04 浙江吉利控股集团有限公司 Dehumidification mode control method and apparatus, device, medium, and program product

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