CN114161936A - Electric automobile and driving range evaluation method, device and medium thereof - Google Patents
Electric automobile and driving range evaluation method, device and medium thereof Download PDFInfo
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- CN114161936A CN114161936A CN202111401738.5A CN202111401738A CN114161936A CN 114161936 A CN114161936 A CN 114161936A CN 202111401738 A CN202111401738 A CN 202111401738A CN 114161936 A CN114161936 A CN 114161936A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 198
- 239000002918 waste heat Substances 0.000 claims abstract description 66
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 57
- 238000010438 heat treatment Methods 0.000 claims description 24
- 230000009467 reduction Effects 0.000 claims description 21
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/18—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases
- B60H1/20—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases using an intermediate heat-transferring medium
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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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/50—Control modes by future state prediction
- B60L2260/52—Control modes by future state prediction drive range estimation, e.g. of estimation of available travel distance
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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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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an electric automobile and a driving range evaluation method, a driving range evaluation device and a driving range evaluation medium thereof, wherein the electric automobile comprises a power battery, an air conditioner, a motor, a water pump and a waste heat pipeline, and the method comprises the following steps: acquiring the average power of a motor, the average power of a water pump, the first power consumption and the first driving range of a power battery when the water pump is not started within a preset time, and acquiring the available electric quantity of the power battery; acquiring second power consumption of the power battery when the water pump is started within a preset time according to the average power of the motor and the first power consumption; and acquiring a second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery. From this, not only through utilizing motor waste heat to reduce the consumption, effectively increased the continuous driving mileage under the low temperature environment, can estimate out actual continuous driving mileage moreover, and then promoted user experience by a wide margin.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an electric automobile and a driving range evaluation method, a driving range evaluation device and a computer readable storage medium thereof.
Background
For an electric automobile, as the air conditioner in the passenger compartment consumes power in a low-temperature environment, the discharge capacity of the battery is reduced, so that the low-temperature driving range is greatly attenuated relative to the normal temperature, the driving range is obviously shortened at low temperature, the actual driving range cannot be estimated, and the user experience is seriously influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a driving range assessment method for an electric vehicle, so that power consumption is reduced by using waste heat of a motor, driving range under a low temperature environment is effectively increased, actual driving range can be assessed, and user experience is greatly improved.
A second object of the invention is to propose a computer-readable storage medium.
The third purpose of the invention is to provide an electric automobile.
A fourth object of the present invention is to provide a driving range evaluation device for an electric vehicle.
In order to achieve the above object, a first aspect of the present invention provides a driving range assessment method for an electric vehicle, where the electric vehicle includes a power battery, an air conditioner, a motor, a water pump and a waste heat pipeline, the water pump is disposed in the waste heat pipeline and is configured to control water flowing in the waste heat pipeline to transfer waste heat of the motor to the air conditioner, and the driving range assessment method for the electric vehicle includes: acquiring the average power of a motor, the average power of a water pump, the first power consumption and the first driving range of a power battery when the water pump is not started within a preset time, and acquiring the available electric quantity of the power battery; acquiring second power consumption of the power battery when the water pump is started within a preset time according to the average power of the motor and the first power consumption; and acquiring a second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery.
According to the driving range evaluation method of the electric automobile, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by utilizing the waste heat of the motor, the driving range in a low-temperature environment is effectively increased, the actual driving range can be evaluated, and the user experience is greatly improved.
According to an embodiment of the invention, obtaining a second power consumption of the power battery when the water pump is started within a preset time according to the average power of the motor and the first power consumption comprises: acquiring the heating efficiency and the waste heat conversion efficiency of a motor and the isentropic efficiency of a compressor in an air conditioner; multiplying the average power of the motor by the heating efficiency, the waste heat conversion efficiency and the isentropic efficiency, and then multiplying by the preset time to obtain the power consumption reduction of the power battery when the water pump is started within the preset time; and subtracting the power consumption reduction amount from the first power consumption to obtain a second power consumption.
According to one embodiment of the invention, obtaining the second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery comprises the following steps: multiplying the average power of the water pump by the preset time to obtain the power consumption increment of the water pump within the preset time; adding the second power consumption and the power consumption increment, and then dividing the second power consumption by the first driving range to obtain the energy consumption of the power battery when the water pump is started within the preset time; and dividing the available electric quantity of the power battery by the energy consumption of the power battery to obtain a second driving range.
According to an embodiment of the invention, the method further comprises: acquiring first average power of a compressor in the air conditioner when a water pump is not started within preset time; and acquiring a second average power of the compressor in the air conditioner when the water pump is started within a preset time according to the first average power of the compressor and the average power of the motor.
According to an embodiment of the present invention, obtaining a second average power of a compressor in an air conditioner when a water pump is turned on for a preset time according to a first average power of the compressor and an average power of a motor includes: acquiring the heating efficiency and the waste heat conversion efficiency of a motor and the isentropic efficiency of a compressor in an air conditioner; multiplying the average power of the motor by the heating efficiency, the waste heat conversion efficiency and the isentropic efficiency to obtain the average power reduction of the compressor; and subtracting the average power reduction amount from the first average power of the compressor to obtain a second average power of the compressor.
According to an embodiment of the present invention, the electric vehicle further includes a voltage conversion device for converting a first direct current provided by the power battery into a second direct current to supply power to the water pump, and the method further includes: acquiring first average power of the voltage conversion device when the water pump is not started within a preset time; and acquiring second average power of the voltage conversion device when the water pump is started within preset time according to the first average power of the voltage conversion device and the average power of the water pump.
According to an embodiment of the present invention, obtaining the second average power of the voltage conversion device when the water pump is turned on within the preset time according to the first average power of the voltage conversion device and the average power of the water pump includes: and adding the average power of the water pump to the first average power of the voltage conversion device to obtain a second average power of the voltage conversion device.
In order to achieve the above object, a second aspect of the present invention provides a computer-readable storage medium, on which a driving range assessment program of an electric vehicle is stored, wherein the driving range assessment program of the electric vehicle, when executed by a processor, implements the driving range assessment method of the electric vehicle described above.
According to the computer-readable storage medium provided by the embodiment of the invention, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by using the waste heat of the motor, the driving range in a low-temperature environment is effectively increased, the actual driving range can be estimated, and the user experience is greatly improved.
In order to achieve the above object, an embodiment of a third aspect of the present invention provides an electric vehicle, including: the processor executes the program to realize the driving range evaluation method of the electric automobile.
According to the electric automobile provided by the embodiment of the invention, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by using the waste heat of the motor, the driving range in a low-temperature environment is effectively increased, the actual driving range can be estimated, and the user experience is greatly improved.
In order to achieve the above object, a fourth aspect of the present invention provides a driving range assessment apparatus for an electric vehicle, the electric vehicle including a power battery, an air conditioner, a motor, a water pump and a waste heat pipeline, the water pump being disposed in the waste heat pipeline for controlling water flowing in the waste heat pipeline to transfer waste heat of the motor to the air conditioner, the apparatus including: the acquisition module is used for acquiring the average power of the motor, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started within a preset time, and acquiring the available power of the power battery; and the evaluation module is used for acquiring second power consumption of the power battery when the water pump is started within the preset time according to the average power and the first power consumption of the motor, and acquiring second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery.
According to the driving range evaluation device of the electric automobile, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained through the obtaining module, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained through the evaluating module according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by utilizing the waste heat of the motor, the driving range in the low-temperature environment is effectively increased, the actual driving range can be evaluated, and the user experience is greatly improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a heating mode of an air conditioner according to the related art;
FIG. 2 is a schematic view illustrating a heating method of an air conditioner using waste heat of a motor according to an embodiment of the present invention;
FIG. 3 is a flowchart of a driving range assessment method for an electric vehicle according to one embodiment of the present invention;
fig. 4 is a block diagram of an electric vehicle according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating a driving range estimation apparatus for an electric vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An electric vehicle, a driving range evaluation method thereof, a driving range evaluation device, and a computer-readable storage medium according to an embodiment of the present invention will be described below with reference to the drawings.
It should be noted that fig. 1 is a schematic diagram illustrating a heating manner of a related art air conditioner, and a conventional heat pump air conditioner uses an air source as a heat source, and performs temperature rise regulation on a passenger compartment through a compressor, an indoor condenser and an outdoor evaporator in a low-temperature environment. The low-temperature driving range is greatly attenuated relative to the normal temperature due to the fact that the power consumption of the air conditioner reduces the discharge capacity of the battery, so that the driving range is obviously shortened, the actual driving range cannot be estimated, and the user experience is seriously influenced. Based on this, this application provides an air conditioner heating mode that utilizes motor waste heat, fig. 2 is this air conditioner heating mode schematic diagram, refer to fig. 2 and show, this air conditioner not only uses the air source as the heat source through outdoor air inlet, still uses the motor waste heat as the heat source, specifically, electric automobile in this application can include power battery (not shown in the figure), air conditioner (including compressor, indoor condenser and outdoor evaporimeter), motor, water pump (not shown in the figure) and waste heat pipeline, wherein the water pump sets up in the waste heat pipeline for the water flow in the control waste heat pipeline is in order to transmit the waste heat of motor to the air conditioner. Therefore, the power consumption is reduced by utilizing the waste heat of the motor in the low-temperature environment, and the driving range in the low-temperature environment is effectively increased.
Fig. 3 is a flowchart of a driving range evaluation method of an electric vehicle according to an embodiment of the present invention, and referring to fig. 3, the driving range evaluation method of the electric vehicle may include the following steps:
step S101: obtaining the average power P of the motor within the preset time tElectric machineAverage power P of water pumpWater pumpAnd the first power consumption E of the power battery when the water pump is not started1And a first driving range S1And obtaining the available electric quantity E of the power batteryCan be used。
It should be noted that, for the preset time t, the preset single cycle time may be set, and in a specific example, the preset single cycle time may be 1800 s. When the driving range is evaluated, the electricity in the preset time t can be acquiredAverage power P of the machineElectric machineAverage power P of water pumpWater pumpAnd the first power consumption E of the power battery when the water pump is not started1And a first driving range S1. For the first power consumption E therein1And a first driving range S1In other words, the power consumption and the driving range of the power battery are respectively set within the preset time t without using the residual heat of the motor as the heat source. In addition, the available electric quantity E of the power battery can be obtainedCan be usedIt may be the available electric quantity of the power battery in the current state.
Step S102: according to the average power P of the motorElectric machineAnd a first amount of power consumption E1Obtaining second power consumption E of the power battery when the water pump is started within preset time t2。
In particular, according to the average power P of the motorElectric machineThe residual heat of the motor can be evaluated, and when the water pump is started, the residual heat of the motor can also be used as a component of the air conditioner heat source of the passenger compartment, so that the first power consumption E within the preset time t when the water pump is not started is reduced1Reduce the second power consumption E within the preset time after the water pump is started2。
Further, according to the average power P of the motorElectric machineAnd a first amount of power consumption E1Obtaining second power consumption E of the power battery when the water pump is started within preset time t2The method comprises the following steps: obtaining the heating efficiency eta of the motor1Waste heat conversion efficiency eta2And isentropic efficiency eta of compressor in air conditioner3(ii) a Average power P of motorElectric machineAnd the heat generation efficiency eta1Waste heat conversion efficiency eta2And isentropic efficiency η3Multiplying the multiplied value by a preset time t to obtain the power consumption reduction amount of the power battery when the water pump is started within the preset time t; the first power consumption E1Subtracting the power consumption reduction amount to obtain a second power consumption E2。
Specifically, the heat generation efficiency η1The ratio of heat energy generated by a motor to consumed electric energy in a working condition of preset time is defined; for waste heat conversion efficiency eta2In other words, the motor can perform heat exchange with outdoor air to dissipate heat through the shellOn the other hand, heat is taken away through water flow under the transportation of the water pump, and the ratio of the heat taken away by the water is the waste heat conversion efficiency eta2(ii) a Isentropic efficiency η of compressor3It is the ratio of the isentropic power of the compressor to the power actually required by the compressed working medium. Average power P of motorElectric machineAnd the heat generation efficiency eta1Waste heat conversion efficiency eta2And isentropic efficiency η3The contribution of the motor waste heat in unit time to the heating of the air conditioner can be estimated by multiplying the power consumption of the power battery in unit time when the water pump is started, namely, the power consumption reduction of the power battery in unit time when the water pump is stopped can be estimated, then the product is multiplied by preset time, the power consumption reduction of the power battery in preset time t when the water pump is started can be obtained, and the second power consumption E2Is the first power consumption E1Minus the amount of power consumption, i.e. E2＝E1-PElectric machineη1η2η3t。
Step S103: according to the second power consumption E2Average power P of water pumpWater pumpFirst driving range S1And available electric quantity E of power batteryCan be usedObtaining a second driving range S of the power battery when the water pump is started within a preset time t2。
Particularly, because under the condition that does not adopt this application heating methods, motor water pump does not need work when low temperature is continued to be driven, and under the condition of the heat pump air conditioner of this application heating methods, when regard as the heat source with the motor waste heat to supply, motor water pump operation accomplishes the heat exchange in order to carry rivers, can consume extra electric quantity simultaneously, consequently can pass through average power P of water pumpWater pumpMultiplying the preset time t to obtain the power consumption increment P of the water pump within the preset time tWater pumpt. Then the second power consumption E2Plus an increase P in power consumptionWater pumpAfter t, the first driving range S is divided1To obtain the energy consumption EC of the power battery when the water pump is started within the preset time t1I.e. by
Then the available electric quantity E of the power batteryCan be usedIs divided byEnergy consumption EC of power battery1Obtaining a second driving range S2I.e. by
According to the driving range evaluation method of the electric automobile, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by utilizing the waste heat of the motor, the driving range in a low-temperature environment is effectively increased, the actual driving range can be evaluated, and the user experience is greatly improved.
In one embodiment, the method further comprises: obtaining a first average power P of a compressor in an air conditioner when a water pump is not started within a preset time1(ii) a According to the first average power P of the compressor1And the average power P of the motorElectric machineObtaining a second average power P of a compressor in the air conditioner when a water pump is started within a preset time2。
Particularly, after the water pump is started, the waste heat of the motor and the air source can be jointly used as the heat source of the air conditioner, so that the power consumption of the compressor can be effectively reduced, namely the average power of the compressor is from the first average power P1Reduced to a second average power P2And the average power of the compressor is reduced and the average power P of the motor is reducedElectric machineDirectly related, therefore, the first average power P of the compressor when the water pump is started can be obtained1And the average power P of the motorElectric machineTo obtain the second average power P of the compressor when the water pump is started2。
Further, according to the first average power P of the compressor1And average power of the motor is obtainedSecond average power P of compressor in air conditioner when water pump is started within set time2The method comprises the following steps: obtaining the heating efficiency eta of the motor1Waste heat conversion efficiency eta2And isentropic efficiency eta of compressor in air conditioner3(ii) a Average power P of motorElectric machineAnd the heat generation efficiency eta1Waste heat conversion efficiency eta2And isentropic efficiency η3Multiplying to obtain the average power reduction of the compressor; the first average power P of the compressor1Subtracting the average power reduction amount to obtain a second average power P of the compressor2。
That is, the heating efficiency η of the motor is obtained1Waste heat conversion efficiency eta2And isentropic efficiency eta of compressor in air conditioner3And the average power P of the motor is calculatedElectric machineAnd the heat generation efficiency eta1Waste heat conversion efficiency eta2And isentropic efficiency η3The average power reduction of the compressor of the air conditioner can be estimated by multiplying the average power reduction of the compressor of the air conditioner when the water pump is closed, so that the second average power P of the compressor when the motor waste heat and the air source are used as the heat source of the air conditioner2For the first average power P of the compressor when the water pump is not turned on1Minus the above-mentioned average power reduction, i.e. P2＝P1-PElectric machineη1η2η3。
In one embodiment, the electric vehicle further includes a voltage conversion device for converting a first direct current provided by the power battery into a second direct current to supply power to the water pump, and the method further includes: obtaining a first average power P of the voltage conversion device when the water pump is not started within a preset time t1'; according to the first average power P of the voltage conversion device1' average power P of water pumpWater pumpAcquiring a second average power P of the voltage conversion device when the water pump is started within a preset time2’。
Specifically, under the condition that the heat supply mode is not adopted, the motor water pump does not work when the heat pump air conditioner runs at low temperature, and under the condition that the heat pump air conditioner adopting the heat supply mode is adopted, when the residual heat of the motor is used as a heat source for supplementing, the motor water pump runs to supplement the residual heat of the motorThe water flow is conveyed to complete heat exchange, so that the electric automobile can comprise a voltage conversion device which is used for converting the first direct current provided by the power battery into the second direct current to supply power to the water pump. When the average power of the voltage conversion device is evaluated, the first average power P of the voltage conversion device when the water pump is not started can be obtained first1According to the first average power P of the voltage conversion device1' average power P of water pumpWater pumpObtaining a second average power P of the voltage conversion device within a preset time t when the water pump is started2'. In one specific example, the first average power P of the voltage conversion device is measured1' plus mean power P of the water pumpWater pumpObtaining a second average power P of the voltage conversion device2', i.e. P2'＝P1'-PWater pump。
The present application is further explained and illustrated below by means of a specific example. In the example, the low-temperature driving range in a mode of supplementing the motor waste heat as a heat source is evaluated according to CLTC-P (China light-duty Vehicle driving condition), wherein the single cycle time is 1800s, the first driving range is 14.48km, according to 2019 EV-TEST (Electric Vehicle evaluation), air is heated in an environment of-7 ℃, the temperature in the passenger compartment is maintained to be a normal temperature state, and the environment temperature of the low-temperature operation of the whole Vehicle is set to be-7 ℃.
Firstly, the average power P of the motor in 1800s is obtainedElectric machineAverage power P of water pumpWater pumpAnd the first power consumption E of the power battery when the water pump is not started1And a first driving range S1And obtaining the available electric quantity E of the power batteryCan be used. And obtaining the heating efficiency eta of the motor1Waste heat conversion efficiency eta2And isentropic efficiency eta of compressor in air conditioner3Then according to the average power P of the motorElectric machineAnd a first amount of power consumption E1Obtaining the second average power P of the compressor when the water pump in 1800s is started2And a second power consumption E of the power battery2In which P is2＝P1-PElectric machineη1η2η3，
I.e. power from P1Down to P2With corresponding energy consumption of E1Down to E2. Further, the energy consumption EC of the whole vehicle at the moment can be evaluated1(in kWh/100km),
a second range of the entire vehicle can then be evaluated S2,
further, the first average power P of the voltage conversion device can be obtained1' and evaluating a second average power P of the voltage conversion device when the water pump is started2’，P2'＝P1'-PWater pump。
In summary, according to the driving range evaluation method of the electric vehicle in the embodiment of the invention, the average power of the motor in the preset time, the average power of the water pump, the first power consumption of the power battery when the water pump is not started and the first driving range are obtained, the available power of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery, so that the power consumption is reduced by using the waste heat of the motor, the driving range in the low-temperature environment is effectively increased, the actual driving range can be evaluated, and the user experience is greatly improved.
In one embodiment, a computer-readable storage medium is provided, on which a driving range evaluation program of an electric vehicle is stored, the driving range evaluation program of the electric vehicle, when executed by a processor, implementing the driving range evaluation method of the electric vehicle described above.
According to the computer-readable storage medium of the embodiment of the invention, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by using the waste heat of the motor, the driving range in the low-temperature environment is effectively increased, the actual driving range can be estimated, and the user experience is greatly improved.
Fig. 4 is a block diagram of an electric vehicle according to an embodiment of the present invention. Referring to fig. 4, the electric vehicle 200 includes: the system comprises a memory 201, a processor 202 and a driving range evaluation program of the electric vehicle, wherein the driving range evaluation program is stored in the memory 201 and can run on the processor 202, and when the processor 202 executes the program, the driving range evaluation method of the electric vehicle is realized.
According to the electric automobile provided by the embodiment of the invention, the average power of the motor in the preset time, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started are obtained, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery, so that the power consumption is reduced by utilizing the waste heat of the motor, the driving range in a low-temperature environment is effectively increased, the actual driving range can be estimated, and the user experience is greatly improved.
Fig. 5 is a block diagram illustrating a driving range estimation apparatus for an electric vehicle according to an embodiment of the present invention. Referring to fig. 5, the electric vehicle includes a power battery, an air conditioner, a motor, a water pump and a waste heat pipeline, the water pump is disposed in the waste heat pipeline and used for controlling water in the waste heat pipeline to flow so as to transfer waste heat of the motor to the air conditioner, and the driving range evaluation apparatus 300 of the electric vehicle includes an obtaining module 301 and an evaluation module 302.
The obtaining module 301 is configured to obtain an average power of the motor, an average power of the water pump, a first power consumption and a first driving range of the power battery when the water pump is not started within a preset time, and obtain an available power of the power battery; the evaluation module 302 is configured to obtain a second power consumption of the power battery when the water pump is started within a preset time according to the average power of the motor and the first power consumption, and obtain a second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range, and the available power of the power battery.
In one embodiment, evaluation module 302 is specifically configured to: acquiring the heating efficiency and the waste heat conversion efficiency of a motor and the isentropic efficiency of a compressor in an air conditioner; multiplying the average power of the motor by the heating efficiency, the waste heat conversion efficiency and the isentropic efficiency, and then multiplying by the preset time to obtain the power consumption reduction of the power battery when the water pump is started within the preset time; and subtracting the power consumption reduction amount from the first power consumption to obtain a second power consumption.
In one embodiment, evaluation module 302 is specifically configured to: multiplying the average power of the water pump by the preset time to obtain the power consumption increment of the water pump within the preset time; adding the second power consumption and the power consumption increment, and then dividing the second power consumption by the first driving range to obtain the energy consumption of the power battery when the water pump is started within the preset time; and dividing the available electric quantity of the power battery by the energy consumption of the power battery to obtain a second driving range.
In one embodiment, evaluation module 302 is further configured to: acquiring first average power of a compressor in the air conditioner when a water pump is not started within preset time; and acquiring a second average power of the compressor in the air conditioner when the water pump is started within a preset time according to the first average power of the compressor and the average power of the motor.
Further, the evaluation module 302 is specifically configured to: acquiring the heating efficiency and the waste heat conversion efficiency of a motor and the isentropic efficiency of a compressor in an air conditioner; multiplying the average power of the motor by the heating efficiency, the waste heat conversion efficiency and the isentropic efficiency to obtain the average power reduction of the compressor; and subtracting the average power reduction amount from the first average power of the compressor to obtain a second average power of the compressor.
In one embodiment, the electric vehicle further includes a voltage conversion device for converting the first dc power provided by the power battery into a second dc power to supply power to the water pump, and the evaluation module 302 is further configured to: acquiring first average power of the voltage conversion device when the water pump is not started within a preset time; and acquiring second average power of the voltage conversion device when the water pump is started within preset time according to the first average power of the voltage conversion device and the average power of the water pump.
Further, the evaluation module 302 is specifically configured to: and adding the average power of the water pump to the first average power of the voltage conversion device to obtain a second average power of the voltage conversion device.
For the description of the driving range estimation device of the electric vehicle in the present application, please refer to the description of the driving range estimation method of the electric vehicle in the present application, and detailed description thereof is omitted here.
According to the driving range evaluation device of the electric automobile, the average power of the motor in the preset time, the average power of the water pump, the first power consumption of the power battery when the water pump is not started and the first driving range are obtained through the obtaining module, the available electric quantity of the power battery is obtained, the second power consumption of the power battery when the water pump is started in the preset time is obtained through the evaluating module according to the average power of the motor and the first power consumption, and the second driving range of the power battery when the water pump is started in the preset time is obtained according to the second power consumption, the average power of the water pump, the first driving range and the available electric quantity of the power battery.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A driving range evaluation method of an electric vehicle is characterized in that the electric vehicle comprises a power battery, an air conditioner, a motor, a water pump and a waste heat pipeline, wherein the water pump is arranged in the waste heat pipeline and used for controlling the flow of water in the waste heat pipeline so as to transfer the waste heat of the motor to the air conditioner, and the method comprises the following steps:
acquiring the average power of the motor, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started within a preset time, and acquiring the available power of the power battery;
acquiring second power consumption of the power battery when the water pump is started within the preset time according to the average power of the motor and the first power consumption;
and acquiring a second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery.
2. The driving range evaluation method of an electric vehicle according to claim 1, wherein the obtaining a second power consumption of the power battery when the water pump is turned on for the preset time according to the average power of the motor and the first power consumption comprises:
acquiring the heating efficiency and the waste heat conversion efficiency of the motor and the isentropic efficiency of a compressor in the air conditioner;
multiplying the average power of the motor by the heating efficiency, the waste heat conversion efficiency and the isentropic efficiency, and then multiplying by the preset time to obtain the power consumption reduction of the power battery when the water pump is started within the preset time;
and subtracting the power consumption reduction amount from the first power consumption to obtain the second power consumption.
3. The driving range evaluation method of an electric vehicle according to claim 1 or 2, wherein the obtaining of the second driving range of the power battery at the time of turning on the water pump for the preset time based on the second power consumption amount, the average power of the water pump, the first driving range, and the available power amount of the power battery includes:
multiplying the average power of the water pump by the preset time to obtain the power consumption increment of the water pump within the preset time;
dividing the second power consumption plus the power consumption increment by the first driving range to obtain the energy consumption of the power battery when the water pump is started within the preset time;
and dividing the available electric quantity of the power battery by the energy consumption of the power battery to obtain the second driving range.
4. The driving range evaluation method of an electric vehicle according to claim 1, further comprising:
acquiring first average power of a compressor in the air conditioner when the water pump is not started within the preset time;
and acquiring a second average power of the compressor in the air conditioner when the water pump is started within the preset time according to the first average power of the compressor and the average power of the motor.
5. The driving range evaluation method of an electric vehicle according to claim 4, further comprising: the obtaining of the second average power of the compressor in the air conditioner when the water pump is turned on within the preset time according to the first average power of the compressor and the average power of the motor includes:
acquiring the heating efficiency and the waste heat conversion efficiency of the motor and the isentropic efficiency of a compressor in the air conditioner;
multiplying the average power of the motor with the heating efficiency, the waste heat conversion efficiency and the isentropic efficiency to obtain the average power reduction amount of the compressor;
and subtracting the average power reduction amount from the first average power of the compressor to obtain a second average power of the compressor.
6. The driving range assessment method of an electric vehicle according to claim 1, wherein the electric vehicle further comprises a voltage conversion device for converting a first direct current provided by the power battery into a second direct current to power the water pump, and the method further comprises:
acquiring first average power of the voltage conversion device when the water pump is not started within the preset time;
and acquiring second average power of the voltage conversion device when the water pump is started within the preset time according to the first average power of the voltage conversion device and the average power of the water pump.
7. The driving range evaluation method of an electric vehicle according to claim 6, wherein the obtaining of the second average power of the voltage conversion device at the time of turning on the water pump for the preset time from the first average power of the voltage conversion device and the average power of the water pump includes:
and adding the average power of the water pump to the first average power of the voltage conversion device to obtain a second average power of the voltage conversion device.
8. A computer-readable storage medium, on which a driving range evaluation program of an electric vehicle is stored, the driving range evaluation program of the electric vehicle implementing the driving range evaluation method of the electric vehicle according to any one of claims 1 to 7 when executed by a processor.
9. An electric vehicle, comprising: a memory, a processor and a driving range evaluation program of an electric vehicle stored on the memory and operable on the processor, the processor implementing the driving range evaluation method of an electric vehicle according to any one of claims 1 to 7 when executing the program.
10. An electric vehicle driving range evaluation device, characterized in that, the electric vehicle includes a power battery, an air conditioner, a motor, a water pump and a waste heat pipeline, the water pump is arranged in the waste heat pipeline for controlling the water flow in the waste heat pipeline to transfer the waste heat of the motor to the air conditioner, the device includes:
the acquisition module is used for acquiring the average power of the motor, the average power of the water pump, the first power consumption and the first driving range of the power battery when the water pump is not started within a preset time, and acquiring the available power of the power battery;
and the evaluation module is used for acquiring second power consumption of the power battery when the water pump is started within the preset time according to the average power of the motor and the first power consumption, and acquiring second driving range of the power battery when the water pump is started within the preset time according to the second power consumption, the average power of the water pump, the first driving range and the available power of the power battery.
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| CN105620487A (en) * | 2016-02-26 | 2016-06-01 | 北京长城华冠汽车科技股份有限公司 | Method and device for estimating driving mileage of electric vehicles |
| WO2021169946A1 (en) * | 2020-02-25 | 2021-09-02 | 中国第一汽车股份有限公司 | Heat management system of electric vehicle |
| CN113400943A (en) * | 2020-03-16 | 2021-09-17 | 北京新能源汽车股份有限公司 | Method and device for estimating driving range of electric automobile and electric automobile |
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