CN112993443A - Control method, medium, and device for electric vehicle - Google Patents
Control method, medium, and device for electric vehicle Download PDFInfo
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- CN112993443A CN112993443A CN201911295205.6A CN201911295205A CN112993443A CN 112993443 A CN112993443 A CN 112993443A CN 201911295205 A CN201911295205 A CN 201911295205A CN 112993443 A CN112993443 A CN 112993443A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- 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
- B60L58/27—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 heating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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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- Air-Conditioning For Vehicles (AREA)
Abstract
The present disclosure relates to a control method, medium, and apparatus of an electric vehicle. The electric vehicle comprises a three-way valve, the three-way valve is used for guiding water heated by a heater into an air-conditioning warm air core body loop and a power battery loop, and the method comprises the following steps: if an instruction indicating that air conditioner warm air and a battery are heated and started at the same time is received, acquiring the current water temperature at a water outlet of the heater; determining the air conditioner required water temperature at the water outlet of the heater; and adjusting the opening of the three-way valve according to the current water temperature and the air-conditioning required water temperature so as to heat the power battery while opening air-conditioning warm air. Like this, can be under the condition of guarantee air conditioner basic demand, the distribution of heat between the automatically regulated air conditioner warm braw and the battery heating the two for increase power battery's activity when realizing the comfortable temperature in driver's cabin, thereby increase power battery discharge capacity, promote the continuation of the journey mileage, strengthen whole car power performance.
Description
Technical Field
The present disclosure relates to the field of control of electric vehicles, and in particular, to a method, medium, and apparatus for controlling an electric vehicle.
Background
When warm air is turned on in winter by a traditional fuel vehicle, the heating effect is achieved by utilizing the heat of engine coolant in a heat exchange mode, and the consumption of oil is low. However, electric vehicles are different from conventional fuel-powered vehicles in heating mode due to different working principles. Because the motor generates less heat in the working process, direct heating circulation cannot be achieved, heating can be performed only through an electric heater (such as a PTC element) arranged inside the air conditioner assembly, the warm air water tank only plays a role in auxiliary heating, and the heating mode can also consume the electric energy of the vehicle and influence the endurance mileage of the vehicle.
Along with the reduction of the temperature, the activity of the lithium ion battery in the electric vehicle is reduced, so that the discharge capacity of the power battery of the electric vehicle is greatly influenced in a cold region, and the driving range of the whole vehicle is seriously shortened. After the warm air is started, the endurance mileage of the whole vehicle is more worried. In the related art, in the case of turning on the warm air, the battery system in the electric vehicle has no heating function, the air-conditioning warm air and the battery heating function are independent of each other, and the warm air is turned on preferentially.
Disclosure of Invention
An object of the present disclosure is to provide a method, medium, and device for controlling an electric vehicle, which have high reliability and good practicability.
In order to achieve the above object, the present disclosure provides a control method of an electric vehicle. The electric vehicle comprises a three-way valve, the three-way valve is used for guiding water heated by a heater into an air-conditioning warm air core body loop and a power battery loop, and the method comprises the following steps:
if an instruction indicating that air conditioner warm air and a battery are heated and started at the same time is received, acquiring the current water temperature at a water outlet of the heater;
determining the air-conditioning required water temperature at the water outlet of the heater, wherein the air-conditioning required water temperature at the water outlet of the heater is the water temperature at the water outlet of the heater required by the air conditioner to reach the target state;
and adjusting the opening of the three-way valve according to the current water temperature and the air-conditioning required water temperature so as to heat the power battery while opening air-conditioning warm air.
Optionally, determining the air-conditioning demand water temperature at the heater water outlet includes:
acquiring a current gear of an air conditioner;
and determining the air-conditioning required water temperature at the water outlet of the heater corresponding to the current gear according to the corresponding relation between the air-conditioning gear and the air-conditioning required water temperature at the water outlet of the heater.
Optionally, adjusting the opening degree of the three-way valve according to the current water temperature and the air conditioner required water temperature includes:
if the current water temperature rises to reach the air conditioner required water temperature, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to reduce by a first opening degree value;
if the current water temperature is larger than the air conditioner required water temperature, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to be reduced by a second opening degree value;
if the current water temperature is greater than a preset first temperature threshold and less than the air-conditioning required water temperature, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to be unchanged, wherein the first temperature threshold is less than the air-conditioning required water temperature;
if the current water temperature is reduced to reach the first temperature threshold value, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase by a third opening degree value;
and if the current water temperature is smaller than the first temperature threshold value, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase a fourth value.
Optionally, the adjusting the opening degree of the three-way valve according to the current water temperature and the air conditioner required water temperature further includes:
if current temperature rises for the first time and reaches air conditioner demand temperature will the three-way valve is in aperture on the air conditioner warm braw core return circuit is adjusted to the aperture upper limit, wherein, the three-way valve is in initial aperture on the air conditioner warm braw core return circuit is 1, the aperture upper limit is under air conditioner warm braw and the battery heating mode of opening simultaneously, current temperature rises for the first time and reaches in the heating process after the air conditioner demand temperature, the upper limit of three-way valve aperture.
Optionally, the adjusting the opening degree of the three-way valve according to the current water temperature and the air conditioner required water temperature further includes:
if the three-way valve is in aperture reduction in the last aperture lower limit of air conditioner warm braw core return circuit, control the three-way valve is in aperture no longer reduces in the last aperture of air conditioner warm braw core return circuit, wherein, the aperture lower limit is under the mode of opening simultaneously for air conditioner warm braw and battery heating, the lower limit of three-way valve aperture.
Optionally, the method further comprises:
acquiring the current temperature of the power battery;
determining a target temperature of the power battery;
and if the current temperature reaches the target temperature, adjusting the opening degree of the three-way valve on the air conditioner warm air core body loop to 1 until the current temperature is reduced to a preset second temperature threshold value.
Optionally, determining the target temperature of the power battery comprises:
acquiring an ambient temperature and a state of charge value of the power battery;
and determining the target temperature of the power battery corresponding to the current ambient temperature and the current state of charge value according to the corresponding relation among the ambient temperature, the state of charge value and the target temperature of the power battery.
Optionally, if an instruction indicating that air-conditioning warm air and battery heating are simultaneously turned on is received, acquiring the current water temperature at the water outlet of the heater, including:
and if an instruction indicating that the air conditioner warm air and the battery are heated and started at the same time is received, acquiring the current water temperature at the water outlet of the heater every preset time.
The present disclosure also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described method provided by the present disclosure.
The present disclosure also provides an electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the above-described method provided by the present disclosure.
Through the technical scheme, the opening degree of the three-way valve is adjusted according to the current water temperature at the water outlet of the heater and the air conditioner required water temperature, so that the power battery is heated while the air conditioner warm air is started. Like this, can be under the condition of guarantee air conditioner basic demand, the distribution of heat between the automatically regulated air conditioner warm braw and the battery heating the two for increase power battery's activity when realizing the comfortable temperature in driver's cabin, thereby increase power battery discharge capacity, promote the continuation of the journey mileage, strengthen whole car power performance.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic diagram of an air conditioner warm air and battery heating configuration according to an exemplary embodiment;
FIG. 2 is a flow chart of a control method of an electric vehicle provided in an exemplary embodiment;
FIG. 3 is a flowchart of a control method of an electric vehicle provided in another exemplary embodiment;
fig. 4 is a block diagram of a control apparatus of an electric vehicle provided in an exemplary embodiment;
FIG. 5 is a block diagram of an electronic device, shown in an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
As described above, in the related art, in the case where warm air is turned on, the battery system in the electric vehicle has no heating function, the air-conditioning warm air and the battery heating function are independent of each other, and the warm air is preferentially turned on. The inventor thinks that the battery system can be heated by the air conditioner PTC heat source of the electric vehicle of the shunting part while meeting certain air conditioner warm air, so that the battery activity and the available energy are greatly improved.
Fig. 1 is a schematic structural diagram of an air conditioner warm air and battery heating according to an exemplary embodiment. As shown in fig. 1, an air conditioning and heating circuit of an electric vehicle includes a three-way valve therein. The three-way valve is used for guiding water heated by the heater into the air-conditioning warm air core body loop and the power battery loop. The three-way valve is an adjustable three-way valve and comprises a water inlet a, a first water outlet b and a second water outlet c. The water inlet a is communicated with a heater (such as a PTC heater), the first water outlet b is communicated with the warm air core body, and the second water outlet c is communicated with the power battery. The heater is used for heating water in the pipeline. Based on the opening degree of the three-way valve at the first water outlet b and the second water outlet c, the electronic water pump can drive water to circulate in the air-conditioning warm air core body loop and/or circulate in the power battery loop.
Fig. 2 is a flowchart of a control method of an electric vehicle according to an exemplary embodiment. As shown in fig. 2, the method may include the following steps.
And step S11, if an instruction for simultaneously starting air conditioning warm air and battery heating is received, acquiring the current water temperature at the water outlet of the heater.
And step S12, determining the air-conditioning required water temperature at the water outlet of the heater. The air conditioner required water temperature at the heater water outlet is the water temperature at the heater water outlet required by the air conditioner to reach the target state.
And step S13, adjusting the opening of the three-way valve according to the current water temperature and the air-conditioning required water temperature, so that the power battery is heated while the air-conditioning warm air is started.
In the cab of the electric vehicle, a button for turning on air-conditioning warm air and a button for battery heating may be provided, respectively. When the two buttons are triggered simultaneously, an instruction can be given to turn on the air-conditioning heater and the battery heating simultaneously. Or, a button for simultaneously starting the air conditioner warm air and the battery heating can be arranged, and only one button needs to be triggered, so that an instruction for simultaneously starting the air conditioner warm air and the battery heating can be sent.
A temperature sensor can be arranged at the water outlet of the heater and used for detecting the real-time water temperature at the water outlet of the heater, namely the current water temperature at the water outlet of the heater.
The air-conditioning demand water temperature at the heater outlet may be a minimum water temperature (e.g., 48 ℃) at the heater outlet required to ensure a minimum requirement for cabin heating. The target state of the air conditioner may be an air conditioning state corresponding to a minimum requirement for cabin heating. That is, when the air conditioner warm air is started, the water temperature at the water outlet of the heater is above the water temperature required by the air conditioner, and then the battery is heated by the divided part of heat. If the water temperature at the water outlet of the heater is lower than the air-conditioning required water temperature, the hot air core can be completely heated, and the power battery is not heated (the opening of the control three-way valve on the air-conditioning hot air core loop is 1, and the opening of the control three-way valve on the power battery loop is 0). The target state of the air conditioner may be a predetermined state, and the air-conditioning demand water temperature may be a preset fixed value, which may be obtained through experiments or experience.
The opening degree of the three-way valve is adjusted according to the size relation between the current water temperature at the water outlet of the heater and the air conditioner required water temperature, namely, the heat of which the proportion can be determined in the heat of the current water temperature can be distributed to the power battery according to the size relation between the current water temperature and the air conditioner required water temperature, namely, the proportion of the heat distributed to the power battery is controlled according to the size of the water temperature.
Through the technical scheme, the opening degree of the three-way valve is adjusted according to the current water temperature at the water outlet of the heater and the air conditioner required water temperature, so that the power battery is heated while the air conditioner warm air is started. Like this, can be under the condition of guarantee air conditioner basic demand, the distribution of heat between the automatically regulated air conditioner warm braw and the battery heating the two for increase power battery's activity when realizing the comfortable temperature in driver's cabin, thereby increase power battery discharge capacity, promote the continuation of the journey mileage, strengthen whole car power performance.
In yet another embodiment, the air conditioning demand water temperature at the heater outlet may be not fixed. In this embodiment, on the basis of fig. 2, the step of determining the air conditioning required water temperature at the heater outlet (step S12) may include:
acquiring a current gear of an air conditioner;
and determining the air-conditioning required water temperature at the water outlet of the heater corresponding to the current gear according to the corresponding relation between the air-conditioning gear and the air-conditioning required water temperature at the water outlet of the heater.
Wherein, the corresponding relation between the air conditioner gear and the air conditioner required water temperature can be predetermined and stored. The shift of the air conditioner is a shift indicating the magnitude of the warm air of the air conditioner, and the higher the shift is, the higher the target heating temperature of the air conditioner is. The higher the air conditioner is, the higher the required water temperature at the water outlet of the heater is, and the larger the air conditioner required water temperature is. The air-conditioning required water temperature at the water outlet of the heater corresponding to the current gear can be determined in a searching mode.
In the embodiment, the air conditioner demand water temperature at the heater water outlet changes along with the change of the air conditioner gear, so that the intention (the strength of the warm air) of a user can be considered when controlling heat distribution, the heat is distributed between the warm air and the battery heating, and the flexibility is good.
For a specific regulating strategy of the opening of the three-way valve, the regulating strategy can be divided into a plurality of different sections for control. In still another embodiment, the step of adjusting the opening degree of the three-way valve according to the current water temperature and the air conditioner required water temperature (step S13) may include the following steps on the basis of fig. 1.
(1) And if the current water temperature rises to reach the air conditioner required water temperature, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to reduce by a first opening degree value.
The water temperature at the water outlet of the heater is lower than the water temperature required by the air conditioner before heating. When the heater begins to heat, the current water temperature at the water outlet of the heater gradually increases. In the process that the current water temperature rises but does not reach the air-conditioning required water temperature, the heating heat quantity can be considered to be completely supplied to the warm air core, and the initial opening degree of the three-way valve on the loop of the air-conditioning warm air core can be set to be 1. Therefore, all heat of the heater can be used for air-conditioning warm air without any action on the three-way valve before the water temperature reaches the air-conditioning required water temperature.
If the current water temperature rises to reach the air conditioner required water temperature, the opening degree of the three-way valve on the air conditioner warm air core body loop can be controlled to be reduced, namely the ratio of heat for heating the battery is increased. Specifically, the opening degree of the three-way valve on the air conditioner warm air core body loop can be controlled to be reduced by the first opening degree value. The first opening value may be determined experimentally or empirically in advance, and may be, for example, 5%, where the opening is the proportion of the valve that is open, e.g., 5% of the opening, which is 5% of the total path of the valve that is open.
(2) And if the current water temperature is higher than the air conditioner required water temperature, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to be reduced by a second opening degree value.
Although in the above case (1), the opening degree of the three-way valve on the air conditioner heater core circuit is decreased, there is a possibility that the current water temperature still rises. If the current water temperature continues to rise and is larger than the air conditioner required water temperature, the opening degree of the three-way valve on the air conditioner warm air core body loop can be continuously controlled and reduced, namely the ratio of heat used for heating the battery is continuously increased. Specifically, the opening degree of the three-way valve on the air conditioner warm air core body loop can be controlled to be reduced by the second opening degree value. The second opening value may be experimentally or empirically obtained in advance, and may be 5%, for example. The second opening value may be equal to the first opening value.
Specifically, the current water temperature at the heater water outlet may be acquired every predetermined period of time (e.g., 10ms), and the opening degree of the three-way valve may be adjusted only each time the current water temperature is acquired, so that the adjustment of the opening degree of the three-way valve may have a time interval.
In addition, the timing for adjusting the opening of the three-way valve may be independently timed, and the opening of the three-way valve may be controlled once according to the comparison result between the current water temperature at the heater water outlet and the air-conditioning required water temperature at predetermined time intervals (for example, 10 s). And if the preset time is not reached, no adjustment is carried out. This also allows the adjustment of the opening of the three-way valve to be at intervals in time, avoiding frequent adjustments.
(3) If the current water temperature is larger than a preset first temperature threshold and smaller than the air conditioner required water temperature, the opening degree of the three-way valve on the air conditioner warm air core body loop is controlled to be unchanged, and the first temperature threshold is smaller than the air conditioner required water temperature.
In the case (1), the opening degree of the three-way valve in the core circuit of the air-conditioning heater may be decreased, which may cause a decrease in the water temperature at the heater outlet. If the current water temperature is between the first temperature threshold and the air-conditioning required water temperature (for example, 44-48 ℃), the frequent adjustment of the opening of the three-way valve is avoided when the water temperature at the water outlet of the heater is reduced to the first temperature threshold from the air-conditioning required water temperature, the fluctuation of the opening of the three-way valve is reduced, and the service life of the three-way valve is prolonged.
(4) And if the current water temperature is reduced to reach the first temperature threshold value, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase the third opening degree value.
In the above case (3), even if the opening degree of the three-way valve in the core circuit of the air-conditioning heater is kept constant, the water temperature at the heater outlet may continue to decrease and reach the first temperature threshold. In this case, it is considered necessary to increase the heat rate of the air-conditioning heater, and the opening degree of the three-way valve in the air-conditioning heater core circuit may be controlled to increase the third opening degree value. The third value of the openness may be experimentally or empirically derived in advance, and may be 2%, for example.
(5) And if the current water temperature is smaller than the first temperature threshold value, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to increase the fourth value.
Even in the case (4) described above, the opening degree of the three-way valve in the core circuit of the air-conditioning heater is increased, but the water temperature at the heater outlet may continue to decrease and become lower than the first temperature threshold value. At this time, it is considered necessary to continuously increase the heat rate of the air-conditioning heater, and the opening degree of the three-way valve on the air-conditioning heater core body circuit may be controlled to increase the fourth value. The fourth value may be experimentally or empirically derived in advance, and may be 2% for example. The fourth value may be equal to the third value.
In each of the above cases, the current water temperature at the heater water outlet may be acquired at predetermined time intervals, so that the adjustment of the opening degree of the three-way valve may be performed at time intervals.
In still another embodiment, the step of adjusting the opening degree of the three-way valve according to the current water temperature and the air-conditioning required water temperature (step S13) may further include:
and if the current water temperature rises for the first time to reach the air-conditioning required water temperature, adjusting the opening degree of the three-way valve on the air-conditioning warm air core body loop to be the opening degree upper limit. The initial opening degree of the three-way valve on the air-conditioning warm air core body loop is 1. The upper limit of the opening is the upper limit of the opening of the three-way valve in the heating process after the current water temperature rises for the first time to reach the air-conditioning required water temperature under the mode that the air-conditioning warm air and the battery are heated and started simultaneously.
That is, the opening degree of the three-way valve on the air conditioner heater core body loop cannot exceed the opening degree upper limit at the maximum after that no matter what the water temperature at the heater water outlet.
Meanwhile, if the opening degree of the three-way valve on the air-conditioning warm air core body loop is reduced to the opening degree lower limit, the opening degree of the three-way valve on the air-conditioning warm air core body loop is controlled not to be reduced. The lower limit of the opening is the lower limit of the opening of the three-way valve in the mode that air conditioner warm air and battery heating are simultaneously started. The lower opening limit is the minimum opening of the three-way valve on the air-conditioning heater core body loop, and the opening of the three-way valve on the air-conditioning heater core body loop cannot be smaller than the lower opening limit no matter what the water temperature at the water outlet of the heater is.
In the embodiment, the maximum value and the minimum value of the opening degree of the three-way valve on the core body loop of the air-conditioning heating air are set, so that the heat proportion for air-conditioning heating is changed within a relatively proper range, and the stability of the air-conditioning heating air is guaranteed.
In yet another embodiment, the method may further comprise the steps of:
acquiring the current temperature of the power battery; determining a target temperature of the power battery; and if the current temperature reaches the target temperature, adjusting the opening degree of the three-way valve on the air conditioner warm air core body loop to 1 until the current temperature is reduced to a preset second temperature threshold value.
That is, when the temperature of the power battery reaches the target temperature, the heating of the power battery may be turned off, and at this time, the temperature of the power battery may be gradually decreased, and the power battery may not be heated until the temperature of the power battery is decreased to the second temperature threshold.
In this embodiment, when the power battery is in a temperature region near the target temperature, the power battery is not heated, and when the temperature of the power battery is less than the second temperature threshold, the opening degree of the three-way valve is adjusted again to heat the power battery. Therefore, frequent heating of the power battery is avoided, the control strategy is simplified, the energy is saved, and the service life of the battery is prolonged.
The target temperature of the power battery can be pre-stored and fixed. Or may be determined according to the environment and the real-time state of the power battery. In an embodiment, the step of determining the target temperature of the power cell may comprise the steps of:
acquiring ambient temperature and a state of charge (SOC) value of a power battery; and determining the target temperature of the power battery corresponding to the current ambient temperature and the current state of charge value according to the corresponding relation among the ambient temperature, the state of charge value and the target temperature of the power battery.
The corresponding relation among the ambient temperature, the state of charge value and the target temperature of the power battery can be predetermined and stored. For example, table 1 below shows one example of the correspondence relationship. In this embodiment, for example, when the soc value is 30% and the ambient temperature T0 is 5 ℃, the target temperature of the corresponding power battery is 18 ℃. As another example, when the state of charge value is 60% and the ambient temperature T0 is 26 ℃, the target temperature of the corresponding power cell is-30 ℃ (i.e., no heating is required).
In addition, an interpolation method can be adopted to set the corresponding relation among the environment temperature, the state of charge value and the target temperature of the power battery.
TABLE 1
In the embodiment, the target temperature of the power battery is determined according to the environment and the real-time state of the power battery, so that a better target temperature of the power battery can be determined under the current environment and the charge state of the power battery, and the increase of the endurance mileage and the increase of the power performance under the existing conditions are facilitated.
As described above, in order to allow the adjustment of the opening degree of the three-way valve to have a time interval, the current water temperature at the heater outlet may be acquired every predetermined period of time. In another embodiment, if an instruction indicating that the air conditioner heater and the battery are simultaneously turned on is received, the step of obtaining the current water temperature at the heater outlet (step S13) may include: and if an instruction indicating that the air conditioner warm air and the battery are heated and started simultaneously is received, acquiring the current water temperature at the water outlet of the heater every preset time.
In each different case (for example, the five cases (1) - (5) above), there may be different interval durations, and when another case is entered, the timer may be cleared and restarted.
Fig. 3 is a flowchart of a control method of an electric vehicle according to another exemplary embodiment. In the embodiment of fig. 3, the heating of the power cell is turned off when the temperature of the power cell reaches the target temperature. And in the process that the current water temperature at the water outlet of the heater does not reach the required water temperature of the air conditioner, the heated heat is completely supplied to the warm air core body. The description will not be repeated here.
The present disclosure also provides a control apparatus of an electric vehicle. The electric vehicle comprises a three-way valve, and the three-way valve is used for guiding water heated by a heater into an air-conditioning warm air core body loop and a power battery loop. Fig. 4 is a block diagram of a control apparatus of an electric vehicle provided in an exemplary embodiment. As shown in fig. 4, the control apparatus 10 of the electric vehicle may include a first acquisition module 11, a determination module 12, and an adjustment module 13.
The first obtaining module 11 is configured to obtain a current water temperature at the water outlet of the heater if an instruction indicating that the air-conditioning warm air and the battery are simultaneously turned on is received.
The first determining module 12 is configured to determine an air-conditioning required water temperature at the heater water outlet, where the air-conditioning required water temperature at the heater water outlet is a water temperature at the heater water outlet required by the air conditioner to reach a target state.
The first adjusting module 13 is used for adjusting the opening of the three-way valve according to the current water temperature and the air-conditioning demand water temperature, so that the power battery is heated while the air-conditioning warm air is started.
Optionally, the first determination module 12 may include a first acquisition sub-module and a first determination sub-module.
The first obtaining submodule is used for obtaining the current gear of the air conditioner.
The first determining submodule is used for determining the air-conditioning required water temperature at the heater water outlet corresponding to the current gear according to the corresponding relation between the air-conditioning gear and the air-conditioning required water temperature at the heater water outlet.
Optionally, the first adjustment module 13 may include a first control sub-module, a second control sub-module, a third control sub-module, a fourth control sub-module, and a fifth control sub-module.
The first control submodule is used for controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to reduce by a first opening degree value if the current water temperature rises to reach the air-conditioning required water temperature;
the second control submodule is used for controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to be reduced by a second opening degree value if the current water temperature is larger than the air-conditioning required water temperature;
the third control sub-module is used for controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to be unchanged if the current water temperature is greater than a preset first temperature threshold and less than the air conditioner required water temperature, and the first temperature threshold is less than the air conditioner required water temperature;
the fourth control submodule is used for controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase the third opening degree value if the current water temperature is reduced to reach the first temperature threshold value;
and the fifth control submodule is used for controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase the fourth value if the current water temperature is smaller than the first temperature threshold value.
Optionally, the adjustment module 13 may further include a sixth control sub-module.
The sixth control submodule is used for adjusting the opening of the three-way valve on the air-conditioning warm air core body loop to be the opening upper limit if the current water temperature rises to reach the air-conditioning required water temperature for the first time, wherein the initial opening of the three-way valve on the air-conditioning warm air core body loop is 1, the opening upper limit is the opening upper limit in the heating process after the current water temperature rises to reach the air-conditioning required water temperature for the first time under the mode that the air-conditioning warm air and the battery are heated and are opened simultaneously.
Optionally, the first regulation module 13 may further include a seventh control sub-module.
And the seventh control submodule is used for controlling the opening of the three-way valve on the air-conditioning warm air core body loop not to be reduced if the opening of the three-way valve on the air-conditioning warm air core body loop is reduced to an opening lower limit, wherein the opening lower limit is the lower limit of the opening of the three-way valve under the simultaneous opening mode of the air-conditioning warm air and the battery heating.
Optionally, the apparatus 10 may further include a second obtaining module, a second determining module, and a second adjusting module.
The second acquisition module is used for acquiring the current temperature of the power battery.
The second determination module is used for determining the target temperature of the power battery.
And the second adjusting module is used for adjusting the opening degree of the three-way valve on the air conditioner warm air core body loop to 1 if the current temperature reaches the target temperature until the current temperature is reduced to a preset second temperature threshold value.
Optionally, the second determination module may include a second acquisition sub-module and a second determination sub-module.
And the second acquisition submodule is used for acquiring the ambient temperature and the state of charge value of the power battery.
The second determining submodule is used for determining the target temperature of the power battery corresponding to the current ambient temperature and the current state of charge value according to the corresponding relation among the ambient temperature, the state of charge value and the target temperature of the power battery.
Optionally, the first obtaining module 11 may include a third obtaining submodule.
And the third acquisition submodule is used for acquiring the current water temperature at the water outlet of the heater every preset time if receiving an instruction of simultaneously starting the air conditioning warm air and the battery heating.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Through the technical scheme, the opening degree of the three-way valve is adjusted according to the current water temperature at the water outlet of the heater and the air conditioner required water temperature, so that the power battery is heated while the air conditioner warm air is started. Like this, can be under the condition of guarantee air conditioner basic demand, the distribution of heat between the automatically regulated air conditioner warm braw and the battery heating the two for increase power battery's activity when realizing the comfortable temperature in driver's cabin, thereby increase power battery discharge capacity, promote the continuation of the journey mileage, strengthen whole car power performance.
The present disclosure also provides an electronic device comprising a memory and a processor.
The memory has stored thereon a computer program. The processor is used to execute the computer program in the memory to implement the steps of the above-described method provided by the present disclosure.
Fig. 5 is a block diagram illustrating an electronic device 500 in accordance with an example embodiment. As shown in fig. 5, the electronic device 500 may include: a processor 501 and a memory 502. The electronic device 500 may also include one or more of a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.
The processor 501 is configured to control the overall operation of the electronic device 500, so as to complete all or part of the steps in the control method of the electric vehicle. The memory 502 is used to store various types of data to support operation at the electronic device 500, such as instructions for any application or method operating on the electronic device 500 and application-related data, such as contact data, messaging, pictures, audio, video, and so forth. The Memory 502 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia component 503 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 502 or transmitted through the communication component 505. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 504 provides an interface between the processor 501 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 505 may thus comprise: Wi-Fi module, Bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic Device 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described control method of the electric vehicle.
In another exemplary embodiment, there is also provided a computer readable storage medium including program instructions which, when executed by a processor, implement the steps of the control method of the electric vehicle described above. For example, the computer readable storage medium may be the memory 502 described above including program instructions executable by the processor 501 of the electronic device 500 to perform the control method of the electric vehicle described above.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A control method of an electric vehicle including a three-way valve for introducing water heated by a heater into an air conditioner heater core circuit and a power battery circuit, the method comprising:
if an instruction indicating that air conditioner warm air and a battery are heated and started at the same time is received, acquiring the current water temperature at a water outlet of the heater;
determining the air-conditioning required water temperature at the water outlet of the heater, wherein the air-conditioning required water temperature at the water outlet of the heater is the water temperature at the water outlet of the heater required by the air conditioner to reach a target state;
and adjusting the opening of the three-way valve according to the current water temperature and the air-conditioning required water temperature so as to heat the power battery while opening air-conditioning warm air.
2. The method of claim 1, wherein determining the air conditioning demand water temperature at the heater outlet comprises:
acquiring a current gear of an air conditioner;
and determining the air-conditioning required water temperature at the water outlet of the heater corresponding to the current gear according to the corresponding relation between the air-conditioning gear and the air-conditioning required water temperature at the water outlet of the heater.
3. The method according to claim 1, wherein adjusting the opening degree of the three-way valve according to the current water temperature and the air-conditioning demand water temperature includes:
if the current water temperature rises to reach the air conditioner required water temperature, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to reduce by a first opening degree value;
if the current water temperature is larger than the air conditioner required water temperature, controlling the opening degree of the three-way valve on the air conditioner warm air core body loop to be reduced by a second opening degree value;
if the current water temperature is greater than a preset first temperature threshold and less than the air-conditioning required water temperature, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to be unchanged, wherein the first temperature threshold is less than the air-conditioning required water temperature;
if the current water temperature is reduced to reach the first temperature threshold value, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase by a third opening degree value;
and if the current water temperature is smaller than the first temperature threshold value, controlling the opening degree of the three-way valve on the air-conditioning warm air core body loop to increase a fourth value.
4. The method according to claim 3, wherein adjusting the opening degree of the three-way valve according to the current water temperature and the air-conditioning demand water temperature, further comprises:
if current temperature rises for the first time and reaches air conditioner demand temperature will the three-way valve is in aperture on the air conditioner warm braw core return circuit is adjusted to the aperture upper limit, wherein, the three-way valve is in initial aperture on the air conditioner warm braw core return circuit is 1, the aperture upper limit is under air conditioner warm braw and the battery heating mode of opening simultaneously, current temperature rises for the first time and reaches in the heating process after the air conditioner demand temperature, the upper limit of three-way valve aperture.
5. The method according to claim 3, wherein adjusting the opening degree of the three-way valve according to the current water temperature and the air-conditioning demand water temperature, further comprises:
if the three-way valve is in aperture reduction in the last aperture lower limit of air conditioner warm braw core return circuit, control the three-way valve is in aperture no longer reduces in the last aperture of air conditioner warm braw core return circuit, wherein, the aperture lower limit is under the mode of opening simultaneously for air conditioner warm braw and battery heating, the lower limit of three-way valve aperture.
6. The method of claim 1, further comprising:
acquiring the current temperature of the power battery;
determining a target temperature of the power battery;
and if the current temperature reaches the target temperature, adjusting the opening degree of the three-way valve on the air conditioner warm air core body loop to 1 until the current temperature is reduced to a preset second temperature threshold value.
7. The method of claim 6, wherein determining the target temperature of the power cell comprises:
acquiring an ambient temperature and a state of charge value of the power battery;
and determining the target temperature of the power battery corresponding to the current ambient temperature and the current state of charge value according to the corresponding relation among the ambient temperature, the state of charge value and the target temperature of the power battery.
8. The method of claim 1, wherein obtaining the current water temperature at the heater outlet if an instruction is received to turn on both air conditioning heater and battery heating simultaneously comprises:
and if an instruction indicating that the air conditioner warm air and the battery are heated and started at the same time is received, acquiring the current water temperature at the water outlet of the heater every preset time.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 8.
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