CN113815423A - Energy feedback control method and device of electric automobile and vehicle - Google Patents
Energy feedback control method and device of electric automobile and vehicle Download PDFInfo
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- 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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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
- 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
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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
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Abstract
The invention provides an energy feedback control method and device of an electric automobile and a vehicle, wherein the method comprises the following steps: in the vehicle navigation mode, acquiring a navigation route of a vehicle according to the current position of the vehicle and a preset target position, and segmenting the navigation route to obtain a plurality of road sections; calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle; when the driving range is less than or equal to the current display range of the vehicle, selecting one brake feedback gear from a plurality of preset brake feedback gears according to the corresponding road condition when the vehicle runs to the current road section, so that the vehicle can perform energy feedback on the current road section according to the selected brake feedback gear; according to the method, the navigation route is segmented according to the mileage target, and the energy recovery state is automatically adjusted according to the road condition of each road section, so that the energy is saved, and the mileage target is promoted to be achieved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an energy feedback control method and device for an electric automobile and an automobile.
Background
With the increasingly prominent world environmental protection problems and energy crisis, new energy electric vehicles with the characteristics of fuel energy conservation, low exhaust emission, less pollution, low noise and the like become the targets pursued by people. At present, the development and popularization of electric automobiles face many challenges, and especially the limitation of battery technology still makes the driving range become a main obstacle for the development of electric automobiles. The energy feedback technology can recover partial energy in the sliding and braking stages of the vehicle, so that the driving range of the vehicle and the utilization rate of the energy of the whole vehicle can be greatly improved.
The existing energy feedback technology is based on hybrid power and electric automobiles, when the vehicle decelerates and brakes, the motion energy of the vehicle is not converted into heat energy through a braking system, but can be converted into electric energy by a motor and stored in a battery for driving the vehicle to run. At present, the energy feedback of the vehicle does not carry out brake feedback according to the actual condition of driving, and the defect of energy waste exists.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an energy feedback control method and apparatus for an electric vehicle, and a vehicle, which fully consider road conditions during driving, save energy, and promote achievement of a driving range.
In a first aspect, an embodiment of the present invention provides an energy feedback control method for an electric vehicle, including:
in a vehicle navigation mode, acquiring a navigation route of a vehicle according to the current position of the vehicle and a preset target position, and segmenting the navigation route to obtain a plurality of road sections; the road conditions of two adjacent road sections are different;
calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle;
and when the cocoa driving mileage is less than or equal to the current display mileage of the vehicle, selecting one braking feedback gear from a plurality of preset braking feedback gears according to the corresponding road condition when the vehicle drives to the current road section, so that the vehicle carries out energy feedback on the current road section according to the selected braking feedback gear.
As an improvement of the above solution, the calculating a driving range according to the current environmental information of the vehicle, the current vehicle operating state and the current remaining energy of the vehicle includes:
acquiring the reference energy consumption of the vehicle under the current vehicle running state and the current environmental information according to a preset reference energy consumption model; the reference energy consumption model is obtained by correcting the actual energy consumption of the vehicle under different vehicle running states and environmental information;
and calculating the driving range according to the reference energy consumption and the current residual energy of the vehicle.
As an improvement of the above scheme, the reference energy consumption model includes a reference energy consumption curve corresponding to the vehicle running state and a reference energy consumption matrix corresponding to the environmental information;
then, the method further comprises:
correcting the reference energy consumption curve according to the actual energy consumption of the vehicle in different vehicle running states;
and correcting the reference energy consumption matrix according to the actual energy consumption of the vehicle under different environmental information.
As an improvement of the above scheme, the obtaining of the reference energy consumption of the vehicle under the current vehicle operating state and the current environmental information according to the preset reference energy consumption model includes:
acquiring dynamic reference energy consumption of the vehicle in the current vehicle running state according to the corrected reference energy consumption curve;
acquiring static reference energy consumption of the vehicle under the current environmental information according to the corrected reference energy consumption matrix;
and obtaining the reference energy consumption according to the dynamic reference energy consumption and the static reference energy consumption.
As an improvement of the above solution, the calculating a driving range according to the reference energy consumption and the current remaining energy of the vehicle includes:
obtaining an estimated mileage according to the reference energy consumption and the current residual energy of the vehicle;
filtering the estimated mileage;
adjusting the refreshing time and the refreshing step length according to the change rule of the driving range of the vehicle before the current moment;
adjusting the estimated mileage after filtering according to the adjusted refreshing time and the refreshing step length;
judging whether the estimated mileage after adjustment is reasonable or not;
and when the adjusted estimated mileage is judged to be reasonable, taking the adjusted estimated mileage as the driving range.
As an improvement of the above solution, the determining whether the adjusted estimated mileage is reasonable includes:
judging whether the adjusted estimated mileage falls within a corresponding mileage interval; the upper limit of the mileage interval is calculated according to the minimum energy consumption of the vehicle in the current driving state and the current environmental information, and the lower limit of the mileage interval is calculated according to the maximum energy consumption in the current driving state;
if so, judging that the estimated mileage after adjustment is reasonable;
if not, the adjusted estimated mileage is judged to be unreasonable.
As an improvement of the above scheme, when the vehicle travels to the current road section, one braking feedback gear is selected from a plurality of preset braking feedback gears according to the corresponding road condition, so that the vehicle performs energy feedback on the current road section according to the selected braking feedback gear, including:
when the vehicle runs to the current road section, selecting one braking feedback gear from a plurality of preset braking feedback gears according to the road condition of the current road section and a preset road condition feedback table; the road condition feedback table comprises corresponding relations between different road conditions and different brake feedback gears, and one road condition corresponds to one brake feedback gear;
determining the feedback deceleration of the vehicle according to the selected brake feedback gear;
and determining the feedback torque of the vehicle according to the feedback deceleration so that the vehicle performs braking feedback deceleration on the current road section according to the feedback torque.
As an improvement of the above scheme, the brake feedback gears include a weak feedback gear, a medium feedback gear and a strong feedback gear;
when the vehicle is in the weak feedback gear, the feedback deceleration of the vehicle is smaller than a preset first speed threshold;
when the vehicle is in the middle feedback gear, the vehicle feedback deceleration is greater than or equal to the first speed threshold and smaller than or equal to a preset second speed threshold;
when the vehicle is in the strong feedback gear, the feedback deceleration of the vehicle is larger than a second speed threshold.
In a second aspect, an embodiment of the present invention provides an energy feedback control apparatus for an electric vehicle, including:
the navigation route dividing module is used for obtaining a navigation route of the vehicle according to the current position and the preset target position of the vehicle in a vehicle navigation mode, and segmenting the navigation route to obtain a plurality of road sections; the road conditions of two adjacent road sections are different;
the driving range calculation module is used for calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle;
and the energy feedback module is used for selecting one braking feedback gear from a plurality of preset braking feedback gears according to the corresponding road condition when the vehicle runs to the current road section when the driving mileage is less than or equal to the current display mileage of the vehicle, so that the vehicle can perform energy feedback on the current road section according to the selected braking feedback gear.
In a third aspect, an embodiment of the present invention provides a vehicle, including:
one or more processors;
a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the energy feedback control method of the electric vehicle according to any one of the first aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: under the condition that the vehicle starts navigation, the navigation route is segmented, and the energy recovery state is automatically adjusted according to the road condition of each road section, so that the energy is saved, and the achievement of the target mileage is promoted.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an energy feedback control method for an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an energy feedback control device of an electric vehicle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, the present invention provides an energy feedback control method for an electric vehicle, including:
s11: in a vehicle navigation mode, acquiring a navigation route of a vehicle according to the current position of the vehicle and a preset target position, and segmenting the navigation route to obtain a plurality of road sections; the road conditions of two adjacent road sections are different;
the road conditions comprise an uphill road condition, a downhill road condition, a high-speed road condition, an urban road condition and the like.
S12: calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle;
s13: and when the driving mileage is less than or equal to the current display mileage of the vehicle, selecting one brake feedback gear from a plurality of preset brake feedback gears according to the corresponding road condition when the vehicle drives to the current road section, so that the vehicle can perform energy feedback on the current road section according to the selected brake feedback gear.
In the embodiment of the invention, under the condition that the vehicle starts navigation, the calculated driving range is taken as the target range, if the driving range is in the long endurance mode, the energy recovery state is automatically adjusted according to the road condition, the energy is saved, the achievement of the target range is promoted, and meanwhile, more energy can be recovered through energy feedback so as to make up the deviation of the driving range and the displayed range.
In an alternative embodiment, the calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current remaining energy of the vehicle comprises:
acquiring the reference energy consumption of the vehicle under the current vehicle running state and the current environmental information according to a preset reference energy consumption model; the reference energy consumption model is obtained by correcting the actual energy consumption of the vehicle under different vehicle running states and environmental information;
and calculating the driving range according to the reference energy consumption and the current residual energy of the vehicle.
Further, the reference energy consumption model comprises a reference energy consumption curve corresponding to the vehicle running state and a reference energy consumption matrix corresponding to the environmental information;
then, the method further comprises:
correcting the reference energy consumption curve according to the actual energy consumption of the vehicle in different vehicle running states;
and correcting the reference energy consumption matrix according to the actual energy consumption of the vehicle under different environmental information.
Further, the obtaining of the reference energy consumption of the vehicle under the current vehicle operating state and the current environmental information according to the preset reference energy consumption model includes:
acquiring dynamic reference energy consumption of the vehicle in the current vehicle running state according to the corrected reference energy consumption curve;
acquiring static reference energy consumption of the vehicle under the current environmental information according to the corrected reference energy consumption matrix;
and obtaining the reference energy consumption according to the dynamic reference energy consumption and the static reference energy consumption.
Specifically, the current vehicle running state includes a vehicle speed, a working state of an energy consumption accessory, pedal opening and other running data, and the current environment information includes road conditions, weather, wind speed, air density and the like. When the vehicle leaves a factory, a reference energy consumption curve based on the vehicle speed is preset and is used for representing energy consumption corresponding to a standard working condition (such as asphalt road condition, no gradient and 25 ℃ of ambient temperature) under different vehicle speeds, so that each different vehicle speed has a corresponding energy consumption, and a corresponding reference energy consumption curve, namely a reference energy consumption curve corresponding to the vehicle running state, exists in a set vehicle speed range; in the subsequent driving process of the vehicle, the actual energy consumption under different vehicle speeds can be monitored, and then the actual energy consumption is adopted to correct the energy consumption under the corresponding vehicle speed of the reference energy consumption curve, so that the reference energy consumption curve is closer to the actual condition of the vehicle, and the estimation precision of the endurance mileage is improved.
The energy consumption correction method comprises the steps that a reference energy consumption matrix based on the environment is preset when a vehicle leaves a factory and is used for representing energy consumption of the vehicle in a static state and corresponding to different environments, and similarly, energy consumption correction can be carried out subsequently according to the actual environment of the vehicle, for example, weather of 30 degrees is the same, and influences on the energy consumption are different between the south and the north, so that correction can be carried out according to the actual energy consumption corresponding to actual environment perception information.
According to the embodiment of the invention, the sum of the dynamic energy consumption under the current vehicle speed and the static energy consumption of the current environment information is used as the reference energy consumption to estimate the driving range of the vehicle, the environment perception and the driving characteristics of the user can be fully considered, the accurate endurance is improved, and the range anxiety of the user is reduced.
In an alternative embodiment, the calculating a driving range according to the reference energy consumption and the current remaining energy of the vehicle includes:
obtaining an estimated mileage according to the reference energy consumption and the current residual energy of the vehicle;
filtering the estimated mileage;
adjusting the refreshing time and the refreshing step length according to the change rule of the driving range of the vehicle before the current moment;
adjusting the estimated mileage after filtering according to the adjusted refreshing time and the refreshing step length;
judging whether the estimated mileage after adjustment is reasonable or not;
and when the adjusted estimated mileage is judged to be reasonable, taking the adjusted estimated mileage as the driving range.
In an alternative embodiment, the determining whether the adjusted estimated mileage is reasonable includes:
judging whether the adjusted estimated mileage falls within a corresponding mileage interval; the upper limit of the mileage interval is calculated according to the minimum energy consumption of the vehicle in the current driving state and the current environmental information, and the lower limit of the mileage interval is calculated according to the maximum energy consumption in the current driving state;
if so, judging that the estimated mileage after adjustment is reasonable;
if not, the adjusted estimated mileage is judged to be unreasonable.
In the embodiment of the invention, because the estimated mileage can use the actual energy consumption in the driving process, the energy consumption fluctuation range is larger, and the calculated estimated mileage has larger fluctuation, therefore, the invention removes some interference by carrying out certain filtering control, such as low-pass filtering control and limiting filtering control, and simultaneously controls the refreshing step length and the refreshing time of the mileage rising or descending according to the actual driving mileage change condition, so that the mileage change meets the psychological expectation of a driver. And finally, reasonably protecting the estimated mileage according to the residual capacity, and preventing the mileage from being not in accordance with the actual situation caused by abnormal interference in the mileage calculation process, for example, the residual energy is 50kwh, the actual driving mileage can be between 150-280 km, and if the previously calculated mileage is not in the range, the mileage calculation is likely to be in a problem. And (4) for the estimated mileage obtained preliminarily, sequentially performing filtering control, refreshing control, step size opening control and mileage protection according to the residual energy, and obtaining the final driving mileage.
In an optional embodiment, when the vehicle travels to the current road section, one braking feedback gear is selected from a plurality of preset braking feedback gears according to a corresponding road condition, so that the vehicle performs energy feedback on the current road section according to the selected braking feedback gear, including:
when the vehicle runs to the current road section, selecting one braking feedback gear from a plurality of preset braking feedback gears according to the road condition of the current road section and a preset road condition feedback table; the road condition feedback table comprises corresponding relations between different road conditions and different brake feedback gears, and one road condition corresponds to one brake feedback gear;
determining the feedback deceleration of the vehicle according to the selected brake feedback gear;
and determining the feedback torque of the vehicle according to the feedback deceleration so that the vehicle performs braking feedback deceleration on the current road section according to the feedback torque.
Further, the brake feedback gears comprise a weak feedback gear, a middle feedback gear and a strong feedback gear;
when the vehicle is in the weak feedback gear, the feedback deceleration of the vehicle is smaller than a preset first speed threshold;
when the vehicle is in the middle feedback gear, the vehicle feedback deceleration is greater than or equal to the first speed threshold and smaller than or equal to a preset second speed threshold;
when the vehicle is in the strong feedback gear, the feedback deceleration of the vehicle is larger than a second speed threshold.
In the embodiment of the present invention, the first speed threshold and the second speed threshold are not specifically limited, and may be set according to the specific situation of the vehicle, for example, the first speed threshold is 0.1g, and the second speed threshold is 0.2 g.
In the embodiment of the invention, the high-speed road condition and the uphill road condition correspond to a weak feedback gear, and the urban road condition and the downhill road condition correspond to a strong feedback gear, so that under the condition that the vehicle starts navigation, if the vehicle is in a long endurance mode, the energy recovery state is automatically adjusted according to the road condition, for example, under the high-speed road condition, the vehicle can be favorable for driving for a longer distance by using weak feedback, and under the urban condition, the braking requirement is more frequent, and the strong feedback setting can effectively reduce the frequency of the driver for stepping on the brake, can well convert kinetic energy into electric energy and reduce the braking loss, and also under the downhill road condition, the strong feedback is favorable for converting potential energy into electric energy and reducing the braking consumption. On the uphill road condition, the weak feedback setting can effectively reduce the kinetic energy loss and is beneficial to reducing the energy consumption.
In order to further reduce energy consumption and improve the energy utilization rate of the vehicle, after the driving range of the vehicle is calculated, the driving range is taken as the target range of the vehicle, and the following energy distribution and thermal management processes can be performed when the vehicle is started, wherein the energy distribution process specifically comprises the following steps:
determining the target maximum allowable discharge power of the vehicle according to the driving range and the current display range of the vehicle;
and distributing energy to energy consuming accessories of the vehicle according to the target maximum allowable discharge power.
In the embodiment of the invention, the reference energy consumption is corrected based on the actual energy consumption of the vehicle, the influence of the current running state and environment of the vehicle on the energy consumption of the vehicle is fully considered, the target maximum allowable discharge power of the vehicle is determined according to the available driving range and the display range which are calculated based on the corrected reference energy consumption and residual energy, the energy distribution of the energy-consuming accessories of the whole vehicle can be timely adjusted based on the current driving condition of the vehicle, and the aims of controlling the maximum consumption of the vehicle and reducing the energy consumption are achieved, so that the driving range of the vehicle is improved, and the display range is promoted to reach the standard.
In an alternative embodiment, the determining the target maximum allowable discharge power of the vehicle according to the driving range and the current display range of the vehicle includes:
calculating the difference value of the travelled mileage and the current displayed mileage of the vehicle;
calculating a power consumption reduction value according to the mileage difference value, the current maximum allowable discharge power of the vehicle and the current vehicle speed;
and calculating the target maximum allowable discharge power of the vehicle according to the power consumption reduction value.
Specifically, the target maximum allowable discharge power of the vehicle may be obtained by calculating a difference between the current maximum allowable discharge power and the power consumption reduction value.
Further, the calculating a power consumption reduction value according to the mileage difference value, the current maximum allowable discharge power of the vehicle, and the current vehicle speed includes:
according to the formula
Calculating a power consumption reduction value;
wherein s represents a preset first correction coefficient, n represents a preset second correction coefficient, m represents a preset third correction coefficient, P represents the current maximum allowable discharge power, X represents a mileage difference value, and V represents the current vehicle speed of the vehicle.
In the embodiment of the invention, the target maximum allowable discharge power of the vehicle is calculated based on the mileage difference value between the driving range and the current display range of the vehicle, so that the vehicle mileage can be further promoted to reach the standard, and the mileage anxiety of a user is reduced.
In an optional embodiment, the method further comprises:
monitoring the total energy consumption of all energy-consuming accessories of the vehicle, and calculating a first mileage consumed by the energy-consuming accessories according to the total energy consumption;
and when the first mileage of the energy-consuming accessories is greater than the preset initial allocated mileage, switching the energy-consuming accessories without work requirements in the vehicle to a power-saving mode, and performing power limitation on the energy-consuming accessories with the energy consumption greater than a preset first threshold value in the vehicle.
Further, when the first mileage of the energy-consuming accessory is greater than or equal to the preset initial allocated mileage, the current working state of the energy-consuming accessory is maintained.
In the embodiment of the invention, in the driving process of the vehicle, the energy consumption accessories are possibly excessively consumed, so that the consumed mileage exceeds the initial allocated mileage, therefore, the energy consumption accessories of the vehicle need to be monitored, the energy consumption accessories without current working requirements are actively controlled to enter a power saving mode, the maximum consumed power of the high-energy-consumption accessories is limited, and the consumed mileage of the energy consumption accessories is ensured not to exceed or exceed the initial allocated mileage as little as possible. The control of the energy consumption of the whole vehicle is realized through energy distribution control and energy consumption accessory control, so that the energy is saved, more allowance is provided for the mileage target, the achievement of the target mileage is promoted, and the user experience can be improved.
In an optional embodiment, the method further comprises:
when the driving range is less than the current display range of the vehicle and a wiper of the vehicle is in an automatic state, detecting whether the vehicle meets a preset wiper control condition; wherein the wiper control conditions include: the vehicle is in a stationary state and it is detected that the driver of the vehicle does not look ahead;
and when the vehicle meets the wiper control condition, the working frequency of the wiper of the vehicle is reduced.
In the embodiment of the invention, when the driving range is less than the current display range of the vehicle and the wiper state is an automatic state (Auto), the operating frequency of the automatically controlled wiper is reduced under the condition that the vehicle is static and a driver does not visually observe the front, so that the power consumption is saved. For the driving scene of the working condition of traffic jam in the urban area in rainy days, when the driver has no need for the front view under the condition, the working frequency of the windscreen wiper can be reduced, the energy consumption is effectively reduced, and the mileage target is promoted to be achieved.
The method comprises the following steps that a camera in the automobile detects the face of a driver to determine whether the driver can visually see the front; for example, when the frontal face information of the driver is continuously detected for a set period of time, it is determined that the driver is visually in front.
In an optional embodiment, the method further comprises:
when the driving range is smaller than the current display range of the vehicle, detecting whether the vehicle meets any preset air conditioner control condition; wherein the air conditioning control conditions include: the vehicle is in a driving state, and the opening height of a vehicle window of the vehicle is greater than a preset height threshold value, or the vehicle is in a non-driving state, and the opening angle of a vehicle door of the vehicle is greater than a preset angle threshold value;
and when the vehicle meets the air conditioner control condition, reducing the output power of the air conditioner of the vehicle.
In the embodiment of the invention, when the driving range is smaller than the current display range of the vehicle, the vehicle is in a driving state, and the window opening height is larger than the height threshold value, the output power of the air conditioner is properly reduced for saving energy, and if the vehicle is in a non-driving state and the door opening angle is larger than the angle threshold value, the output power of the air conditioner is also properly reduced for energy consumption. The energy loss caused by heat exchange is reduced by controlling the output power of the air conditioner, and the energy consumption is reasonably reduced, so that the mileage target is promoted to be achieved.
The thermal management process specifically comprises the following steps:
in a vehicle navigation mode, acquiring a navigation route of a vehicle according to the current position of the vehicle and a preset target position, and segmenting the navigation route to obtain a plurality of navigation road sections; the road conditions of two adjacent navigation road sections are different;
acquiring a thermal management control strategy from a preset thermal management control strategy library according to a road condition corresponding to a next navigation road section of the vehicle, current environment information and a current vehicle running state;
and correspondingly controlling a thermal management system of the vehicle by adopting the thermal management control strategy in the next navigation section.
In the embodiment of the invention, the navigation route is segmented, the vehicle state and the environment information are monitored, the optimal thermal management control strategy is obtained according to the road condition and the environment information of each navigation road section and the vehicle running state, the segmented thermal management control is realized, the energy can be effectively saved, the energy utilization rate is improved, and the continuation of the journey mileage of the vehicle is improved, so that the guarantee for the achievement of the driving mileage is provided.
In an alternative embodiment, the thermal management process further comprises:
according to various pre-stored road condition and environmental information, working modes of the thermal management system in a vehicle running state and thermal management energy consumption in corresponding working modes, a working mode corresponding to the lowest thermal management energy consumption in any road condition and environmental information is excavated by adopting a machine learning algorithm and is used as a thermal management control strategy in any road condition and environmental information;
and storing the mined thermal management control strategy into a preset thermal management control strategy library.
In order to better extract effective thermal management control information, the information fusion is carried out on environmental information such as various road conditions, environmental temperature, wind speed and air density and the thermal management information of the vehicle, the optimal thermal management control strategy which achieves the same refrigeration/heating effect and is lowest in energy consumption is extracted by adopting a machine learning algorithm according to the result obtained after the information fusion, the thermal management control strategy is stored in a preset thermal management control strategy library, the optimal control strategy is provided for the subsequent thermal management of the vehicle, and the lowest energy consumption is ensured when the same refrigeration/heating effect is achieved.
In an optional embodiment, the obtaining a thermal management control policy from a preset thermal management control policy library according to a road condition corresponding to a next navigation road segment of a vehicle, current environment information, and a current vehicle operating state includes:
and according to the road condition corresponding to the next navigation road section, the current environment information and the current vehicle running state, performing matching search on the thermal management control strategy library to obtain a control strategy corresponding to the road condition corresponding to the next navigation road section and the current environment information.
Further, the thermal management control strategy comprises fan rotating speed control of the thermal management system, target water temperature control, water pump rotating speed control of the thermal management system and valve body control of the thermal management system, and the thermal management control strategy further comprises one of cooling mode control and heating mode control.
In an optional embodiment, when the thermal management strategy includes a cooling mode control, the performing a corresponding control on a thermal management system of the vehicle by using the thermal management control strategy in the next navigation segment includes:
predicting the thermal management energy consumption of the road condition of the next navigation road section according to the thermal management control strategy;
according to the thermal management energy consumption, judging the cooling requirement of the road condition of the next navigation road section;
when the cooling demand is a preset high cooling demand, cooling control is carried out on a thermal management system of the vehicle by adopting the thermal management control strategy in the next navigation road section;
when the cooling demand is a preset inter-cooling demand, maintaining the current cooling state of the thermal management system;
and when the cooling demand is a preset low cooling demand, adjusting the cooling threshold of the thermal management system.
The cooling requirements of the vehicle in the embodiment of the invention are divided into three grades, namely high grade, medium grade and low grade, and one road condition corresponds to one cold area requirement. The navigation method comprises the steps of segmenting a navigation route under the condition that the vehicle starts navigation, planning the cooling requirement of the next road condition in advance according to the road segmentation condition, planning the thermal management control strategy of the next road condition in advance, achieving the minimum thermal management energy consumption when the destination is reached, saving energy as far as possible, and providing more allowance for ensuring the mileage target.
In an optional embodiment, when the thermal management strategy includes heating mode control, the performing corresponding control on the thermal management system of the vehicle by using the thermal management control strategy in the next navigation segment includes:
when the vehicle meets the preset motor feedback condition, heating control is carried out on a thermal management system of the vehicle by adopting the thermal management control strategy on the next navigation road section;
wherein the motor feedback condition includes: when the driving range of the vehicle is smaller than the current display range, the allowable charging power of the battery of the vehicle is smaller than the preset power threshold value, and the vehicle is in a throttle release state.
In the embodiment of the invention, the driving range of the vehicle is compared with the displayed range, if the driving range is smaller than the displayed range, the allowable charging power of the battery is smaller than the preset power threshold value and the vehicle is in a throttle release state, the feedback requirement of the motor is indicated, and if the control is not carried out, the motor can only carry out feedback or not carry out feedback with small power. In order to optimize energy consumption, when the feedback requirement of the motor is determined, the battery heating is started according to the feedback requirement of the motor, so that the feedback energy is converted into the energy for heating the battery, the motor provides larger feedback force, the braking loss is reduced, meanwhile, the battery activity can be improved by heating the battery, the available energy of the battery is increased, and the service life of the battery is prolonged.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
1. under the condition that the vehicle starts navigation, the navigation route is segmented, and the energy recovery state is automatically adjusted according to the road condition of each road section, so that the energy is saved, and the achievement of the driving range is promoted.
2. When the vehicle is started, energy distribution is carried out based on the driving range, so that energy consumption can be effectively reduced, the energy utilization rate is improved, and the vehicle range is promoted to reach the standard;
3. energy feedback and thermal management control are performed in the vehicle running process, so that energy consumption can be further reduced, the energy utilization rate is improved, and the vehicle mileage is promoted to reach the standard;
4. based on the calculated driving range, energy distribution, energy feedback and thermal management control can be carried out on the vehicle, energy saving is guaranteed as far as possible through the energy distribution and thermal management control of the vehicle, energy consumption can be reduced through energy feedback and energy consumption accessory control, the driving range of the vehicle is improved, closed-loop control with the range as a target is achieved, accurate driving control of the vehicle is achieved, user range anxiety is reduced, and user experience is improved.
Example two
Referring to fig. 2, an embodiment of the present invention provides an energy feedback control device for an electric vehicle, including:
the navigation route dividing module 1 is used for obtaining a navigation route of the vehicle according to the current position and a preset target position of the vehicle in a vehicle navigation mode, and segmenting the navigation route to obtain a plurality of road sections; the road conditions of two adjacent road sections are different;
the driving range calculation module 2 is used for calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle;
and the energy feedback module 3 is used for selecting one braking feedback gear from a plurality of preset braking feedback gears according to the corresponding road condition when the vehicle runs to the current road section when the driving mileage is less than or equal to the current display mileage of the vehicle, so that the vehicle can perform energy feedback on the current road section according to the selected braking feedback gear.
In an alternative embodiment, the range calculation module 2 comprises:
the reference energy consumption obtaining unit is used for obtaining reference energy consumption of the vehicle under the current vehicle running state and the current environmental information according to a preset reference energy consumption model; the reference energy consumption model is obtained by correcting the actual energy consumption of the vehicle under different vehicle running states and environmental information;
and the mileage calculation unit is used for calculating the driving range according to the reference energy consumption and the current residual energy of the vehicle.
In an alternative embodiment, the reference energy consumption model includes a reference energy consumption curve corresponding to the vehicle running state, and a reference energy consumption matrix corresponding to the environmental information;
then, the apparatus further comprises:
the first energy consumption correction module is used for correcting the reference energy consumption curve according to the actual energy consumption of the vehicle in different vehicle running states;
and the second energy consumption correction module is used for correcting the reference energy consumption matrix according to the actual energy consumption of the vehicle under different environmental information.
In an optional embodiment, the reference energy consumption obtaining unit includes:
the first energy consumption obtaining unit is used for obtaining dynamic reference energy consumption of the vehicle in the current vehicle running state according to the corrected reference energy consumption curve;
the second energy consumption obtaining unit is used for obtaining the static reference energy consumption of the vehicle under the current environmental information according to the corrected reference energy consumption matrix;
and the reference energy consumption calculating unit is used for obtaining the reference energy consumption according to the dynamic reference energy consumption and the static reference energy consumption.
In an alternative embodiment, the mileage calculating unit includes:
the mileage estimation unit is used for obtaining estimated mileage according to the reference energy consumption and the current residual energy of the vehicle;
the filtering unit is used for carrying out filtering processing on the estimated mileage;
the refreshing adjusting unit is used for adjusting the refreshing time and the refreshing step length according to the change rule of the driving range of the vehicle before the current moment;
the mileage adjusting unit is used for adjusting the estimated mileage after filtering according to the adjusted refreshing time and the refreshing step length;
the reasonability judging unit is used for judging whether the adjusted estimated mileage is reasonable or not; and when the adjusted estimated mileage is judged to be reasonable, taking the adjusted estimated mileage as the driving range.
Further, judging whether the adjusted estimated mileage falls within a corresponding mileage interval; the upper limit of the mileage interval is calculated according to the minimum energy consumption of the vehicle in the current driving state and the current environmental information, and the lower limit of the mileage interval is calculated according to the maximum energy consumption in the current driving state;
if so, judging that the estimated mileage after adjustment is reasonable;
if not, the adjusted estimated mileage is judged to be unreasonable.
In an alternative embodiment, the energy feedback module 3 includes:
the braking feedback gear selecting unit is used for selecting one braking feedback gear from a plurality of preset braking feedback gears according to the road condition of the current road section and a preset road condition feedback table when the vehicle runs to the current road section; the road condition feedback table comprises corresponding relations between different road conditions and different brake feedback gears, and one road condition corresponds to one brake feedback gear;
the feedback deceleration determining unit is used for determining the feedback deceleration of the vehicle according to the selected brake feedback gear;
and the torque control unit is used for determining the feedback torque of the vehicle according to the feedback deceleration so that the vehicle can brake and perform feedback deceleration on the current road section according to the feedback torque.
In an optional embodiment, the brake feedback gears comprise a weak feedback gear, a middle feedback gear and a strong feedback gear;
when the vehicle is in the weak feedback gear, the feedback deceleration of the vehicle is smaller than a preset first speed threshold;
when the vehicle is in the middle feedback gear, the vehicle feedback deceleration is greater than or equal to the first speed threshold and smaller than or equal to a preset second speed threshold;
when the vehicle is in the strong feedback gear, the feedback deceleration of the vehicle is larger than a second speed threshold.
EXAMPLE III
An embodiment of the present invention provides a vehicle, including:
one or more processors;
a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the energy feedback control method of the electric vehicle according to any one of the above embodiments.
The processor implements the steps of the energy feedback control method embodiments of the electric vehicles, such as the steps S11-13 shown in fig. 1, when executing the computer program. Alternatively, the processor implements the functions of the modules/units in the above device embodiments when executing the computer program, such as the navigation route dividing module, and the energy feedback module.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used for describing the execution process of the computer program in the energy feedback device/terminal equipment of the electric vehicle. For example, the computer program may be divided into a navigation route dividing module, and an energy feedback module, and each module has the following specific functions: the navigation route dividing module is used for obtaining a navigation route of the vehicle according to the current position and the preset target position of the vehicle in a vehicle navigation mode, and segmenting the navigation route to obtain a plurality of road sections; the road conditions of two adjacent road sections are different; the driving range calculation module is used for calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle; and the energy feedback module is used for selecting one braking feedback gear from a plurality of preset braking feedback gears according to the corresponding road condition when the vehicle runs to the current road section when the driving mileage is less than or equal to the current display mileage of the vehicle, so that the vehicle can perform energy feedback on the current road section according to the selected braking feedback gear.
The Processor may be a Vehicle Control Unit (VCU), a Central Processing Unit (CPU), or other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like that is the control center for the device and that connects the various parts of the overall device using various interfaces and lines.
The memory may be used to store the computer programs and/or modules, and the processor may implement the various functions of the apparatus by running or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An energy feedback control method of an electric vehicle is characterized by comprising the following steps:
in a vehicle navigation mode, acquiring a navigation route of a vehicle according to the current position of the vehicle and a preset target position, and segmenting the navigation route to obtain a plurality of road sections;
calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle;
and when the driving mileage is less than or equal to the current display mileage of the vehicle, selecting one brake feedback gear from a plurality of preset brake feedback gears according to the corresponding road condition when the vehicle drives to the current road section, so that the vehicle can perform energy feedback on the current road section according to the selected brake feedback gear.
2. The energy feedback control method of claim 1, wherein the calculating the driving range according to the current environmental information of the vehicle, the current vehicle operating state and the current remaining energy of the vehicle comprises:
acquiring the reference energy consumption of the vehicle under the current vehicle running state and the current environmental information according to a preset reference energy consumption model; the reference energy consumption model is obtained by correcting the actual energy consumption of the vehicle under different vehicle running states and environmental information;
and calculating the driving range according to the reference energy consumption and the current residual energy of the vehicle.
3. The energy feedback control method of the electric vehicle according to claim 2, wherein the reference energy consumption model includes a reference energy consumption curve corresponding to a vehicle running state, and a reference energy consumption matrix corresponding to the environmental information;
then, the method further comprises:
correcting the reference energy consumption curve according to the actual energy consumption of the vehicle in different vehicle running states;
and correcting the reference energy consumption matrix according to the actual energy consumption of the vehicle under different environmental information.
4. The energy feedback control method of claim 3, wherein the obtaining of the reference energy consumption of the vehicle under the current vehicle operating state and the current environmental information according to the preset reference energy consumption model comprises:
acquiring dynamic reference energy consumption of the vehicle in the current vehicle running state according to the corrected reference energy consumption curve;
acquiring static reference energy consumption of the vehicle under the current environmental information according to the corrected reference energy consumption matrix;
and obtaining the reference energy consumption according to the dynamic reference energy consumption and the static reference energy consumption.
5. The energy feedback control method of claim 2, wherein the calculating the driving range according to the reference energy consumption and the current remaining energy of the vehicle comprises:
obtaining an estimated mileage according to the reference energy consumption and the current residual energy of the vehicle;
filtering the estimated mileage;
adjusting the refreshing time and the refreshing step length according to the change rule of the driving range of the vehicle before the current moment;
adjusting the estimated mileage after filtering according to the adjusted refreshing time and the refreshing step length;
judging whether the estimated mileage after adjustment is reasonable or not;
and when the adjusted estimated mileage is judged to be reasonable, taking the adjusted estimated mileage as the driving range.
6. The energy feedback control method of claim 5, wherein the determining whether the adjusted estimated mileage is reasonable comprises:
judging whether the adjusted estimated mileage falls within a corresponding mileage interval; the upper limit of the mileage interval is calculated according to the minimum energy consumption of the vehicle in the current driving state and the current environmental information, and the lower limit of the mileage interval is calculated according to the maximum energy consumption in the current driving state;
if so, judging that the estimated mileage after adjustment is reasonable;
if not, the adjusted estimated mileage is judged to be unreasonable.
7. The energy feedback control method of an electric vehicle according to claim 1, wherein the selecting a brake feedback gear from a plurality of preset brake feedback gears according to a corresponding road condition when the vehicle travels to the current road section so that the vehicle performs energy feedback on the current road section according to the selected brake feedback gear comprises:
when the vehicle runs to the current road section, selecting one braking feedback gear from a plurality of preset braking feedback gears according to the road condition of the current road section and a preset road condition feedback table; the road condition feedback table comprises corresponding relations between different road conditions and different brake feedback gears, and one road condition corresponds to one brake feedback gear;
determining the feedback deceleration of the vehicle according to the selected brake feedback gear;
and determining the feedback torque of the vehicle according to the feedback deceleration so that the vehicle performs braking feedback deceleration on the current road section according to the feedback torque.
8. The energy feedback control method of the electric vehicle according to claim 7, wherein the brake feedback gear comprises a weak feedback gear, a medium feedback gear and a strong feedback gear;
when the vehicle is in the weak feedback gear, the feedback deceleration of the vehicle is smaller than a preset first speed threshold;
when the vehicle is in the middle feedback gear, the vehicle feedback deceleration is greater than or equal to the first speed threshold and smaller than or equal to a preset second speed threshold;
when the vehicle is in the strong feedback gear, the feedback deceleration of the vehicle is larger than a second speed threshold.
9. An energy feedback control device of an electric vehicle is characterized by comprising:
the navigation route dividing module is used for obtaining a navigation route of the vehicle according to the current position and the preset target position of the vehicle in a vehicle navigation mode, and segmenting the navigation route to obtain a plurality of road sections;
the driving range calculation module is used for calculating the driving range according to the current environmental information of the vehicle, the current vehicle running state and the current residual energy of the vehicle;
and the energy feedback module is used for selecting one braking feedback gear from a plurality of preset braking feedback gears according to the corresponding road condition when the vehicle runs to the current road section when the driving mileage is less than or equal to the current display mileage of the vehicle, so that the vehicle can perform energy feedback on the current road section according to the selected braking feedback gear.
10. A vehicle, characterized by comprising:
one or more processors;
a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the energy feedback control method of the electric vehicle according to any one of claims 1 to 8.
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