CN111976699B - Vehicle energy management device and method - Google Patents

Vehicle energy management device and method Download PDF

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Publication number
CN111976699B
CN111976699B CN202010819640.0A CN202010819640A CN111976699B CN 111976699 B CN111976699 B CN 111976699B CN 202010819640 A CN202010819640 A CN 202010819640A CN 111976699 B CN111976699 B CN 111976699B
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vehicle
power
range extender
current
information
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CN111976699A (en
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高先进
龚笑舞
易正根
张春英
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/28—Conjoint control of vehicle sub-units of different type or different function including control of fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Mathematical Physics (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The embodiment of the invention discloses a vehicle energy management device and a method, wherein the device comprises: the information acquisition module is used for acquiring the current electric quantity of the energy storage device and pre-stored historical driving data when the condition that the vehicle is powered is monitored; acquiring current segmented road condition information and current vehicle information when historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity; the energy management module is used for determining each control instruction according to the current segmented road condition information and the current vehicle information and correspondingly sending each control instruction to the first range extender, the second range extender or the energy storage device; the problem of the vehicle in-process can't be accurate and reasonable provide the energy supply mode for the vehicle is solved, current electric quantity, historical driving data, current vehicle information and road conditions information according to energy memory have been realized and have been analyzed, and then provide suitable energy supply mode for the vehicle, improved user experience when guaranteeing the vehicle driving demand.

Description

Vehicle energy management device and method
Technical Field
The embodiment of the invention relates to the technical field of vehicle energy management, in particular to a vehicle energy management device and method.
Background
At present, there are various ways of providing energy to a vehicle during the running process of the vehicle, such as fuel oil, fuel cell, power battery (energy storage device), etc. The fuel cell driven vehicle can meet the requirement of long-time low-emission operation and is a good energy source choice; the fuel oil driven vehicle can meet the requirement of long endurance mileage; the power battery is used as an energy source to drive the vehicle, so that the use is safe and the cost is low. However, under the condition of resource shortage of the current gas station, the endurance mileage of the fuel cell system is limited to a certain extent, the fuel oil range-extending system pollutes the environment and cannot be used in a zero emission area, the maximum power of the power cell is limited in the using process, and the requirements of acceleration performance and long-time zero emission operation cannot be met, so that how to reasonably integrate and use various vehicle driving modes in the vehicle driving process is a problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a vehicle energy management device and method, which are used for selecting a proper energy supply mode for a vehicle in the running process of the vehicle.
In a first aspect, an embodiment of the present invention provides a vehicle energy management device, including:
the information acquisition module is used for acquiring the current electric quantity of the energy storage device and pre-stored historical driving data when the condition that the vehicle is powered is monitored; when the historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained;
the energy management module is used for determining the output power and the road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, judging whether the output power is in a preset range or not if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, and generating and sending a first control instruction to a first range extender if the output power is in the preset range; otherwise, generating and sending a second control instruction to a second range extender; when the historical driving data do not meet the preset condition of speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, a third control instruction is sent to the energy storage device;
the first range extender is used for providing energy for the vehicle according to the first control instruction;
the second range extender is used for providing energy for the vehicle according to the second control instruction;
the energy storage device is used for providing energy for the vehicle according to the third control instruction;
the first range extender is a fuel engine and a generator, and the second range extender is a fuel cell.
In a second aspect, an embodiment of the present invention further provides a vehicle energy management method, which is executed by the vehicle energy management device described in any one of the embodiments of the present invention, and the vehicle energy management method includes:
when the condition that the vehicle is in a power supply condition is monitored, the information acquisition module acquires the current electric quantity of the energy storage device and pre-stored historical driving data; when the historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained;
the energy management module determines output power and road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, whether the output power is in a preset range is judged, and if yes, a first control instruction is generated and sent to a first range extender; otherwise, generating and sending a second control instruction to a second range extender; when the historical driving data do not meet the preset condition of speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, a third control instruction is sent to the energy storage device;
the first range extender provides energy for the vehicle according to the first control instruction;
the second range extender provides energy for the vehicle according to the second control instruction;
the energy storage device provides energy for the vehicle according to the third control instruction;
the first range extender is a fuel engine and a generator, and the second range extender is a fuel cell.
The embodiment of the invention provides a vehicle energy management device and a vehicle energy management method, wherein an information acquisition module is used for acquiring the current electric quantity of an energy storage device and pre-stored historical driving data when a vehicle is monitored to be in a power supply condition; when the historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained; the energy management module is used for determining the output power and the road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, judging whether the output power is in a preset range or not if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, and generating and sending a first control instruction to a first range extender if the output power is in the preset range; otherwise, generating and sending a second control instruction to a second range extender; when the historical driving data do not meet the preset condition of speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, a third control instruction is sent to the energy storage device; the first range extender is used for providing energy for the vehicle according to the first control instruction; the second range extender is used for providing energy for the vehicle according to the second control instruction; the energy storage device is used for providing energy for the vehicle according to the third control instruction; the first range extender is a fuel engine and a generator, and the second range extender is a fuel cell; the problem of the vehicle in-process can't be accurate and reasonable provide the energy supply mode for the vehicle is solved, current electric quantity, historical driving data, current vehicle information and road conditions information according to energy memory have been realized and have been analyzed, and then provide suitable energy supply mode for the vehicle, improved user experience when guaranteeing the vehicle driving demand.
Drawings
Fig. 1 is a block diagram of a vehicle energy management device according to a first embodiment of the present invention;
fig. 2 is a structural diagram of a vehicle energy management apparatus in a second embodiment of the invention;
fig. 3 is a flowchart of a vehicle energy management method according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a structural diagram of an energy management device according to an embodiment of the present invention, where the embodiment is applicable to a situation of managing energy supply of a vehicle, the device includes: the system comprises an information acquisition module 110, an energy management module 120, a first range extender 130, a second range extender 140 and an energy storage device 150;
the information acquisition module 110 is configured to acquire a current electric quantity of the energy storage device and pre-stored historical driving data when it is monitored that the vehicle is in a power supply condition; when the historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained;
the energy management module 120 is configured to determine output power and road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, determine whether the output power is within a preset range if the sum of the road section gas consumption is greater than the gas tank capacity of the vehicle, and generate and send a first control instruction to the first range extender 130 if the output power is within the preset range; otherwise, a second control command is generated and sent to the second range extender 140; when the historical driving data does not meet the preset condition of speed and the current electric quantity is greater than or equal to the electric quantity lower limit, a third control instruction is sent to the energy storage device 150;
the first range extender 130 is configured to provide energy for the vehicle according to the first control instruction;
the second range extender 140 is configured to provide energy for the vehicle according to the second control instruction;
the energy storage device 150 is used for providing energy for the vehicle according to the third control instruction;
the first range extender 130 is a fuel engine and a generator, and the second range extender 140 is a fuel cell.
In this embodiment, the energy management module is in communication connection with the information acquisition module, the first range extender, the second range extender and the energy storage device, and the first range extender, the second range extender and the energy storage device are electrically connected.
In this embodiment, the information acquisition module may be understood as a module for acquiring vehicle information, information existing during a vehicle driving process is stored in the vehicle control unit, the information acquisition module may directly acquire the information from the vehicle control unit, some information needs to be acquired in real time, and the information may be acquired by a sensor and sent to the information acquisition module, and the like. An energy storage device may be understood as a device in a vehicle that provides energy, for example a power battery, which may be a lithium ion battery or other type of battery pack. The current electric quantity can be understood as the electric quantity value of the energy storage device at the current acquisition moment; the historical driving data may be understood as information such as a vehicle running speed that the driver has retained while driving the vehicle before, for example, an average running speed, a maximum speed, an acceleration characteristic, and the like. The preset condition can be understood as a condition set according to the driving speed of the driver, the road speed limit condition and the like; the current segmented road condition information can be understood as a small segment of distance obtained by dividing road sections according to different distinguishing conditions such as speed limit, gas station position, red road lamp, ascending and descending and the like according to the track to be driven by the vehicle. The current vehicle information may be understood as information about the vehicle running at the current time, such as a main drive rotation speed, a gear speed ratio, a main reduction ratio, a drive arm, a vehicle load, a vehicle speed, an air resistance coefficient, a windward area, and the like.
When the vehicle is monitored to be in a power supply condition, or the accelerator in the vehicle is monitored to be pressed down, the vehicle needs certain driving force at the moment, namely the vehicle needs the energy storage device, the first range extender or the second range extender to provide energy so as to drive the vehicle to run. Since there are three different energy providing manners in the vehicle, which manner is to be used for providing energy at this time needs to be determined, the current electric quantity of the energy storage device and the pre-stored historical driving data are obtained through the information obtaining module 110, whether the historical driving data meet the preset condition of the speed or not and whether the current electric quantity is lower than the electric quantity lower limit or not are determined through analyzing the historical driving data, and if the historical driving data meet the preset condition of the speed and/or the current electric quantity is lower than the electric quantity lower limit, the current segmented road condition information and the current vehicle information are obtained again. The current segmented road condition information may be obtained through a Global Positioning System (GPS), and the current vehicle information may be obtained from a vehicle control unit.
The vehicle can log in the personal account number of the driver, so that data generated in the driving process can be correspondingly stored in the personal account number of the driver, the personal driving habit of each driver is closer to when historical driving data are acquired, the data generated in the same vehicle can be stored in the historical data completely, the drivers are not distinguished, and the historical driving data can be stored locally or in a cloud, or stored locally and in the cloud. The historical driving data can be analyzed by the information acquisition module, or the information acquisition module sends the historical driving data and the current electric quantity to the energy management module for analysis after the historical driving data and the current electric quantity are acquired. The analysis of the historical driving data may determine whether the driver is accelerating often, the average vehicle speed of the driver, etc., and a model may be constructed to analyze the historical driving data. If the historical driving data is analyzed to obtain that the driver frequently accelerates or the average vehicle speed is too high (for example, higher than the speed limit of the road section), the historical driving data is determined to meet the preset condition of the speed.
In the present embodiment, the energy management module 120 may be understood as a module that performs processing based on the received information to determine by which way to provide driving force for the vehicle. The output power can be understood as power which is predicted to be output by the driving motor during the running process of the vehicle, and the first range extender and the second range extender are coordinated to supply energy to the driving motor so as to drive the vehicle to run. The road segment gas consumption may be understood as predicting how much fuel cell the vehicle needs to consume on different road segments. The gas tank capacity may be understood as how much fuel is left in the fuel cell in the vehicle. The preset range can be understood as a power value range which is preset according to the optimal working condition of the first range extender, the first range extender is the optimal oil consumption within the preset range, and the oil saving effect can be achieved on the premise of meeting the vehicle running requirement. The first control command can be understood as a command for controlling the first range extender, and the first control command at least comprises the engine speed; the second control command can be understood as a command for controlling a second range extender, wherein the second control command comprises at least the generator power; the third control command may be understood as a command for controlling the operation of the energy storage device.
When the historical driving data do not meet the preset condition of the speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, the vehicle is powered through the energy storage device at the moment, the energy management module sends a third control instruction to the energy storage device, and the energy storage device provides energy for the vehicle when receiving the third control instruction. And when the historical driving data meets the preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity, determining the output power of each segmented road condition according to the current vehicle information and a calculation formula, and further calculating the air consumption of each road segment according to the output power, the vehicle speed, the current segmented road condition information and the like and the calculation formula after calculating the output power. When the sum of the air consumption of each road section is larger than the capacity of an air tank of the vehicle, the second range extender is insufficient to provide power for the whole travel, so that the first range extender is required to provide a part of power, whether the output power is in a preset range or not is judged, if yes, the road section is in the optimal oil consumption area of the first range extender, and a first control instruction is generated and sent to the first range extender, so that the first range extender provides power for the road section. Otherwise, generating and sending a second control command to a second range extender to enable the second range extender to provide power for the road section; when the sum of the air consumption of each road section is less than the air tank capacity of the vehicle, the second range extender is enough to provide power for the whole road section, so that the power can be provided by the second range extender, and the power can also be provided by the first range extender, so that the embodiment of the invention does not specifically limit the situation.
The energy management module in the embodiment of the invention has the precondition that the first range extender, the second range extender and the energy storage device all work normally when the energy management module selects the mode of providing energy for the vehicle. If the energy storage device has a fault, directly judging whether the first range extender works or the second range extender works according to the current segmented road condition information and the current vehicle information; if the first range extender is in fault, directly selecting a second range extender to work when historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity; and if the second range extender fails, directly selecting the first range extender to work when the historical driving data meet the preset condition of the speed and/or the current electric quantity is lower than the lower limit of the electric quantity.
The embodiment of the invention provides a vehicle energy management device, which is characterized in that an information acquisition module is used for acquiring the current electric quantity of an energy storage device and pre-stored historical driving data when a vehicle is monitored to be in a power supply condition; when the historical driving data meet a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained; the energy management module is used for determining the output power and the road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, judging whether the output power is in a preset range or not if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, and generating and sending a first control instruction to a first range extender if the output power is in the preset range; otherwise, generating and sending a second control instruction to a second range extender; when the historical driving data do not meet the preset condition of speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, a third control instruction is sent to the energy storage device; the first range extender is used for providing energy for the vehicle according to the first control instruction; the second range extender is used for providing energy for the vehicle according to the second control instruction; the energy storage device is used for providing energy for the vehicle according to the third control instruction; the first range extender is a fuel engine and a generator, and the second range extender is a fuel cell; the problem of the vehicle in-process can't be accurate and reasonable provide the energy supply mode for the vehicle is solved, current electric quantity, historical driving data, current vehicle information and road conditions information according to energy memory have been realized and have been analyzed, and then provide suitable energy supply mode for the vehicle, improved user experience when guaranteeing the vehicle driving demand.
Example two
Fig. 2 is a structural diagram of a vehicle energy management device according to a second embodiment of the present invention. The technical scheme of the embodiment is further refined on the basis of the technical scheme, and the device specifically comprises: the information acquisition module 210, the energy management module 220, the first range extender 230, the second range extender 240 and the energy storage device 250, wherein the energy management module 220 includes: a power determination unit 221 and a gas consumption determination unit 222.
The power determining unit 221 is configured to determine the output power according to the vehicle load, the vehicle speed, and the preset parameter information in the current vehicle information.
And the air consumption determining unit 222 is configured to determine air consumption of each road section according to the distance of each road section of the current segmented road condition information, the output power, the vehicle speed, and the gas-to-electricity conversion ratio.
In the present embodiment, the power determination unit 221 may be understood as a computer processing unit that performs analysis calculation of output power based on current vehicle information. The preset parameter information comprises a main driving rotating speed, a gear speed ratio, a main reduction ratio, a driving force arm, an air resistance coefficient and the windward area of the vehicle. The gas-electric conversion ratio is a value that has been determined at the time of vehicle production or at the time of production of an electric motor of the vehicle.
The output power can be calculated by combining a certain formula according to the vehicle load, the vehicle speed and the preset parameter information in the current vehicle information. For example, an embodiment of the present invention provides a method for calculating output power:
F＝Ff+Fw(ii) a Formula (1)
F＝9500P/n·N0·N1E; formula (2)
Ff＝mg(k1+k2V); formula (3)
Fw＝C·A·v221.15; formula (4)
Wherein F is driving force, P is output power, N is main driving speed, and N is0Gear speed ratio, N1Is a main reduction ratio, e is a driving force arm, FfRolling resistance, m vehicle load, g acceleration of gravity, k1And k2For calibration data (determined on the basis of vehicle determination), V is vehicle speed, FwIs the air resistance, C is the air resistance coefficient, and A is the windward area.
When the load, speed, main drive speed, gear speed ratio, main speed reduction ratio, drive power arm, gravitational acceleration and k of the whole vehicle are known1、k2And calculating to obtain the output power under the conditions of the air resistance coefficient and the windward area.
Illustratively, the embodiment of the invention provides a method for calculating a road section gas consumption amount, which comprises the following steps:
Hmn＝P·Lmn/vn·η；
wherein HmnFor the gas consumption of the road section, P is the output power, LmnDistance, v, of a road sectionnThe vehicle speed and eta are gas-electric conversion ratio;
and substituting the known output power, the distance between the road sections, the vehicle speed and the gas-electricity conversion ratio into a formula to calculate the gas consumption of each road section. In the calculation process, the currently acquired vehicle speed can be used as the vehicle speed of each road section to calculate the road section air consumption of each road section, or the corresponding speed of the vehicle on each road section can be predicted according to other information such as the current vehicle speed, the acceleration or the historical driving data of the vehicle, and then the air consumption of each road section is calculated.
Exemplarily, an embodiment of the present invention provides a method for dividing a segmented road condition:
determining the position and the destination of the vehicle through a GPS, determining the position of an air station in the intermediate journey from the current position to the destination of the vehicle, and performing primary distribution L1, L2 and L. Then, according to the speed limit conditions (V1, V2, … … and Vn) in each road section, performing secondary distribution on the road sections to obtain L11, L12, … … and L1 n; l21, L22, … …, L25,...... times.lm 1, Lm2, … …, Lmn; obtaining three-level distribution L111, L112, … …, L11p, L121, L122 … …, L12p, … …, Lmn1, Lmn2 and Lmnp according to the number of the traffic lights and the corresponding mileage distribution; and dividing the three-level distributed mileage into three mileage, namely Gmnp road surface mileage, Umnp slope mileage and Dmnp slope mileage according to the road condition characteristics.
Further, the energy management module 220 further includes: an information acquisition unit 223 and a load determination unit 224.
An information obtaining unit 223 for obtaining a historical output power, a historical vehicle speed and preset parameter information of the vehicle;
and a load determining unit 224 for determining a vehicle load according to the historical output power, the historical vehicle speed and the preset parameter information.
In the present embodiment, the historical output power may be understood as the actual output power at a time before the current time during the running of the vehicle; the historical vehicle speed is the vehicle speed at the same time as the historical output power.
The vehicle load can be calculated according to equations 1-4 above. The vehicle load may be calculated after the vehicle starts, and is not calculated during a driving cycle (power-on to power-off) of the vehicle, or may be calculated at intervals, for example, at the current calculation time, the historical output power, the historical vehicle speed and the preset parameter information at the previous time are obtained, and the vehicle load is calculated. The vehicle load calculation can be stored for the next use, and because the vehicle load does not change frequently during a driving cycle, it is not necessary to determine the vehicle load once every time the manner in which the vehicle is powered is determined, avoiding the burden of repeated calculations.
Further, the energy management module 220 includes:
and a state obtaining unit 225 for obtaining the required power and the battery state of the energy storage device.
Wherein the required power is determined according to a corresponding voltage value of a vehicle accelerator;
a power determining unit 226, configured to search a pre-stored power table according to the battery status to determine pre-power;
and the instruction generating unit 227 is configured to search a pre-stored parameter table according to the sum of the required power and the pre-applied power to determine a range extender parameter, and generate a control instruction according to the range extender parameter.
In this embodiment, the state acquiring unit 225 may be understood as a unit that acquires the required power and the state of the energy storage device; the battery state can be understood as the current electric quantity value of the battery or how much the battery needs to be charged; the power determination unit 226 may be understood as a computer processing unit that determines the corresponding power according to the battery status, and the power table may be understood as a data table that stores the electric quantity value and the power correspondingly; the instruction generation unit 227 may be understood as a computer processing unit that generates control instructions; the parameter table may be a rotation speed table storing a correspondence relationship between power and rotation speed, or may be a power generation table storing power and corresponding power generation. The range extender parameter is understood to be a parameter value required by the first or second range extender for providing energy, for example generator power, engine speed.
Acquiring a required power and a battery state of an energy storage state through a state acquisition unit, wherein the state of an energy storage device can be acquired from a vehicle control unit, and the required power acquisition mode can be that a pressure value of an accelerator stepped by a driver is acquired through a sensor and converted into a voltage value and then converted into corresponding power; the battery status of the energy storage device may be obtained directly from the vehicle control unit. Searching a pre-stored power table according to the battery state, finding a power value corresponding to the current battery state, using the power value as pre-power, summing the pre-power and required power to obtain a power value searching parameter table, determining corresponding range extender parameters, and generating a control instruction according to the range extender parameters to control the first range extender or the second range extender to work.
Further, the instruction generating unit 227 is specifically configured to: when the output power is in a preset range, searching a prestored rotating speed table according to the sum of the required power and the pre-added power to determine the rotating speed of the engine of the vehicle, and generating a first control instruction by taking the rotating speed of the engine as a range extender parameter; and when the output power is not in the preset range, searching a pre-stored power generation table according to the sum of the required power and the pre-added power to determine the power of the generator of the vehicle, and generating a second control instruction by taking the power of the generator as a range extender parameter.
In the present embodiment, the tachometer may be understood as a data table storing power values and corresponding engine speeds; the power generation table may be understood as a data table storing power values and corresponding generator powers.
When the output power is within the preset range, a first control instruction needs to be generated to control the first range extender to work, the parameter table at the moment is a prestored rotating speed table, the rotating speed table is searched according to the sum of the required power and the pre-added power to determine the corresponding rotating speed of the engine, the obtained range extender parameter is the rotating speed of the engine, and the first control instruction is generated according to the rotating speed of the engine. When the output power is not within the preset range, a second control instruction needs to be generated to control the second range extender to work, the parameter table at the moment is a pre-stored power generation table, the power generation table is searched according to the sum of the required power and the pre-added power to determine the corresponding power of the generator, the obtained range extender parameter is the power of the generator, and the second control instruction is generated according to the power of the generator.
Illustratively, the battery state is 30% of electric quantity or 30% of required charging, the required power is 70kw, a pre-power is determined to be 20kw by looking up a power table, the pre-power is determined to be 70kw +20kw and is 90kw, when the output power is in a preset range, the rotating speed table is looked up to determine that the rotating speed of the engine corresponding to 90kw is 1000 revolutions, and a first control instruction is generated to control the first range extender to rotate at the speed of 1000 revolutions; when the output power is not in the preset range, searching a power generation power table to determine that the power of the generator corresponding to 90kw is 90kw, and generating a second control instruction to control a second range extender to generate power according to the power of 90 kw; the increased pre-power may charge the energy storage device. In the time interval from the current acquisition moment to the next acquisition moment, if energy is provided through the work of the first range extender, when the work of the first range extender reaches certain intensity, the power supply is switched to the second range extender, because the energy storage device at the moment is charging, when the electric quantity of the energy storage device is higher than an upper limit value, the energy storage device is switched to supply power, when the electric quantity of the energy storage device is lower than a lower limit value, the first range extender or the second range extender is switched to supply power again, the first range extender or the second range extender is switched to be the first range extender or the second range extender depending on whether the power supply before the power supply of the energy storage device is the first range extender or the second range extender, and the power supply mode before the return is correspondingly switched. Similarly, if the power is supplied by the energy storage device in the time interval from the current acquisition moment to the next acquisition moment, if the electric quantity value is lower than the lower limit value, the power is supplied by switching to the first range extender or the second range extender.
Further, the information obtaining module 210 is further configured to obtain the state of the energy storage device when it is monitored that the vehicle is in a braking condition;
accordingly, the energy management module 220 further includes:
a control unit 228, configured to control the driving motor of the vehicle to work reversely and charge the energy storage device if the state of the energy storage device is a charging permission state; otherwise, controlling the driving motor and the generator to work reversely and driving the engine to work.
In this embodiment, the state of the energy storage device may be understood as whether the energy storage device can be currently charged, and includes two states of allowing charging and not allowing charging.
The energy storage device state may be obtained from the vehicle controller, and the information obtaining module 227 obtains the energy storage device state when it is monitored that the vehicle is in the braking state, and sends the energy storage device state to the control unit 228. The control unit 228 controls the generator to work according to the state of the energy storage device; when the state of the energy storage device is charging permission, controlling a driving motor of the vehicle to work reversely to realize energy recovery and charging the energy storage device; otherwise, the driving motor is controlled to work reversely to realize energy recovery, the generator is driven electrically through reverse work, the engine works in an exhaust braking mode, and the braking performance of the whole vehicle is realized.
The embodiment of the invention provides a vehicle energy management device, which solves the problem that an energy supply mode cannot be accurately and reasonably provided for a vehicle in the driving process of the vehicle, determines output power according to vehicle load, vehicle speed and preset parameter information in current vehicle information, determines the air consumption of each road section according to the road section distance, the output power, the vehicle speed and the gas-electric conversion ratio of the current road condition information of the section, and further judges whether a first range extender works or a second range extender works. If the sum of the air consumption of each road section is larger than the capacity of the air tank of the vehicle, the second range extender cannot provide energy for all the roads, the first range extender is powered on by selecting the road section with the output power within the preset range, so that enough energy can be provided in the driving process of the vehicle, the best energy supply effect is achieved, the driving requirement of the vehicle is guaranteed, and the user experience is improved.
EXAMPLE III
Fig. 3 is a flowchart of a vehicle energy management method according to a third embodiment of the present invention, where the vehicle energy management device according to any one of the third embodiment of the present invention executes the method, and the method includes the following steps:
step S310, when the condition that the vehicle is in a power supply condition is monitored, the information acquisition module acquires the current electric quantity of the energy storage device and pre-stored historical driving data; and acquiring current segmented road condition information and current vehicle information when the historical driving data meets a preset condition of speed and/or the current electric quantity is lower than the lower limit of the electric quantity.
Step S320, the energy management module determines output power and road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, whether the output power is in a preset range is judged, and if yes, a first control instruction is generated and sent to a first range extender; otherwise, generating and sending a second control instruction to a second range extender; and sending a third control instruction to the energy storage device when the historical driving data do not meet the preset condition of the speed and the current electric quantity is greater than or equal to the electric quantity lower limit.
The first range extender is a fuel engine and a generator, and the second range extender is a fuel cell.
And S330, the first range extender provides energy for the vehicle according to the first control command.
And step S340, the second range extender provides energy for the vehicle according to the second control instruction.
And S350, the energy storage device provides energy for the vehicle according to the third control instruction.
Steps S330 to S350 are three different implementation manners in the embodiment of the present application, and there is no precedence order, and when the energy management module generates the first control instruction, step S330 is executed; when the energy management module generates a second control instruction, executing step S340; when the energy management module generates the third control instruction, step S350 is performed.
The embodiment of the invention provides a vehicle energy management method, which solves the problem that an energy supply mode cannot be accurately and reasonably provided for a vehicle in the driving process of the vehicle, realizes analysis according to the current electric quantity, historical driving data, current vehicle information and road condition information of an energy storage device, further provides a proper energy supply mode for the vehicle, ensures the driving requirement of the vehicle and simultaneously improves user experience.
Further, the energy management module includes: a power determination unit and a gas consumption determination unit,
determining the output power and the road section gas consumption of each subsection road condition according to the current subsection road condition information and the current vehicle information, wherein the steps comprise:
the power determining unit determines output power according to the vehicle load, the vehicle speed and preset parameter information in the current vehicle information;
and the air consumption determining unit determines the air consumption of each road section according to the distance of each road section of the current segmented road condition information, the output power, the vehicle speed and the gas-electricity conversion ratio.
Further, the energy management module further comprises: the information acquisition unit and the load determination unit correspondingly, the method further comprises:
the information acquisition unit acquires historical output power, historical vehicle speed and preset parameter information of the vehicle.
The load determining unit determines the vehicle load according to the historical output power, the historical vehicle speed and preset parameter information.
Further, the energy management module includes: the device comprises a state acquisition unit, a power determination unit and an instruction generation unit, and correspondingly, the method further comprises the following steps:
the method comprises the steps that a state obtaining unit obtains required power and a battery state of an energy storage device, wherein the required power is determined according to a corresponding voltage value of a vehicle accelerator;
the power determining unit searches a pre-stored power table according to the battery state to determine pre-power;
the command generating unit searches a pre-stored parameter table according to the sum of the required power and the pre-applied power to determine a range extender parameter, and generates a control command according to the range extender parameter.
Further, the instruction generating unit searches a pre-stored parameter table according to the sum of the required power and the pre-power to determine a range extender parameter, and generates a control instruction according to the range extender parameter, including:
when the output power is in a preset range, searching a prestored rotating speed table according to the sum of the required power and the pre-added power to determine the rotating speed of the engine of the vehicle, and generating a first control instruction by taking the rotating speed of the engine as a range extender parameter;
and when the output power is not in the preset range, searching a pre-stored power generation table according to the sum of the required power and the pre-added power to determine the power of the generator of the vehicle, and generating a second control instruction by taking the power of the generator as a range extender parameter.
Further, the method further comprises:
when the situation that the vehicle is in a braking condition is monitored, the state acquisition module acquires the state of the energy storage device;
correspondingly, the energy management module further includes: a control unit for controlling the operation of the display unit,
if the state of the energy storage device is charging permission, controlling a driving motor of the vehicle to work reversely and charging the energy storage device; otherwise, controlling the driving motor and the generator to work reversely and driving the engine to work.
The vehicle energy management method provided by the embodiment of the invention can be executed by the vehicle energy management device provided by any embodiment of the invention, and has corresponding beneficial effects.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (6)

1. A vehicle energy management device, comprising:
the information acquisition module is used for acquiring the current electric quantity of the energy storage device and pre-stored historical driving data when the condition that the vehicle is powered is monitored; when the historical driving data meet a preset condition of speed and the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained;
the energy management module is used for determining the output power and the road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, judging whether the output power is in a preset range or not if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, and generating and sending a first control instruction to a first range extender if the output power is in the preset range; otherwise, generating and sending a second control instruction to a second range extender; when the historical driving data do not meet the preset condition of speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, a third control instruction is sent to the energy storage device;
the first range extender is used for providing energy for the vehicle according to the first control instruction;
the second range extender is used for providing energy for the vehicle according to the second control instruction;
the energy storage device is used for providing energy for the vehicle according to the third control instruction;
the first range extender is a fuel engine and a generator, and the second range extender is a fuel cell;
the energy management module includes:
the state acquisition unit is used for acquiring required power and the battery state of the energy storage device, wherein the required power is determined according to the corresponding voltage value of the vehicle accelerator;
the power determining unit is used for searching a pre-stored power table according to the battery state to determine pre-power;
the command generating unit is used for searching a prestored parameter table according to the sum of the required power and the pre-added power to determine a range extender parameter and generating a control command according to the range extender parameter;
specifically, the output power is obtained by knowing the load of the whole vehicle, the speed of the vehicle, the main driving rotating speed, the gear speed ratio, the main reduction ratio, the driving power arm, the gravity acceleration and the k1、k2The air resistance coefficient and the windward area are calculated by the following formula; the formula is F ═ Ff+Fw；F＝9500P/n·N0·N1·e；Ff＝mg(k1+k2·v)；Fw＝C·A·v221.15; wherein F is driving force, P is output power, N is main driving rotation speed, and N is0Gear ratio, N1Is a main reduction ratio, e is a driving force arm, FfIs rolling resistance, m is load of the whole vehicle, g is gravity acceleration, k1And k is said2For calibration data, said V is vehicle speed, said FwThe air resistance is C, the air resistance coefficient is C, and the frontal area is A;
the energy management module further comprises:
the power determining unit is used for determining output power according to the vehicle load, the vehicle speed and preset parameter information in the current vehicle information;
and the air consumption determining unit is used for determining the air consumption of each road section according to the distance of each road section of the current segmented road condition information, the output power, the vehicle speed and the gas-electricity conversion ratio.
2. The apparatus of claim 1, wherein the energy management module further comprises:
the information acquisition unit is used for acquiring historical output power, historical vehicle speed and preset parameter information of the vehicle;
and the load determining unit is used for determining the vehicle load according to the historical output power, the historical vehicle speed and the preset parameter information.
3. The apparatus according to claim 1, wherein the instruction generation unit is specifically configured to:
when the output power is in a preset range, searching a prestored rotating speed table according to the sum of the required power and the pre-added power to determine the rotating speed of the engine of the vehicle, and generating a first control instruction by taking the rotating speed of the engine as a range extender parameter;
and when the output power is not in the preset range, searching a pre-stored power generation table according to the sum of the required power and the pre-added power to determine the power of the generator of the vehicle, and generating a second control instruction by taking the power of the generator as a range extender parameter.
4. The device of claim 1, wherein the information acquisition module is further configured to acquire the state of the energy storage device when it is monitored that the vehicle is in a braking condition;
correspondingly, the energy management module further includes:
the control unit is used for controlling a driving motor of the vehicle to work reversely and charging the energy storage device if the state of the energy storage device is allowable to charge; otherwise, controlling the driving motor and the generator to work reversely and driving the engine to work.
5. A vehicle energy management method, characterized by being performed by the vehicle energy management device of any one of claims 1-4, the method comprising:
when the condition that the vehicle is in a power supply condition is monitored, the information acquisition module acquires the current electric quantity of the energy storage device and pre-stored historical driving data; when the historical driving data meet a preset condition of speed and the current electric quantity is lower than the lower limit of the electric quantity, current segmented road condition information and current vehicle information are obtained;
the energy management module determines output power and road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, if the sum of the road section gas consumption is larger than the gas tank capacity of the vehicle, whether the output power is in a preset range is judged, and if yes, a first control instruction is generated and sent to a first range extender; otherwise, generating and sending a second control instruction to a second range extender; when the historical driving data do not meet the preset condition of speed and the current electric quantity is greater than or equal to the lower limit of the electric quantity, a third control instruction is sent to the energy storage device;
the first range extender provides energy for the vehicle according to the first control instruction;
the second range extender provides energy for the vehicle according to the second control instruction;
the energy storage device provides energy for the vehicle according to the third control instruction;
the first range extender is a fuel engine and a generator, and the second range extender is a fuel cell;
the energy management module includes: the device comprises a state acquisition unit, a power determination unit and an instruction generation unit, and correspondingly, the method further comprises the following steps:
the method comprises the steps that a state obtaining unit obtains required power and a battery state of an energy storage device, wherein the required power is determined according to a corresponding voltage value of a vehicle accelerator;
the power determining unit searches a pre-stored power table according to the battery state to determine pre-power;
the instruction generating unit searches a pre-stored parameter table according to the sum of the required power and the pre-applied power to determine a range extender parameter, and generates a control instruction according to the range extender parameter;
specifically, the output power is obtained by knowing the load of the whole vehicle, the speed of the vehicle, the main driving rotating speed, the gear speed ratio, the main reduction ratio, the driving power arm, the gravity acceleration and the k1、k2The air resistance coefficient and the windward area are calculated by the following formula; the formula is F ═ Ff+Fw；F＝9500P/n·N0·N1·e；Ff＝mg(k1+k2·v)；Fw＝C·A·v221.15; wherein F is driving force, P is output power, N is main driving rotation speed, and N is0Is a gear speed ratio of N1Is a main reduction ratio, e is a driving force arm, FfFor rolling resistance, m is wholeVehicle load g is gravitational acceleration k1And k is said2For calibration data, said V is vehicle speed, said FwThe air resistance is C, the air resistance coefficient is C, and the frontal area is A;
the energy management module further comprises: a power determination unit and a gas consumption determination unit,
determining the output power and the road section gas consumption of each segmented road condition according to the current segmented road condition information and the current vehicle information, wherein the method comprises the following steps:
the power determining unit determines output power according to the vehicle load, the vehicle speed and preset parameter information in the current vehicle information;
and the air consumption determining unit determines the air consumption of each road section according to the distance of each road section of the current segmented road condition information, the output power, the vehicle speed and the gas-electricity conversion ratio.
6. The method of claim 5, further comprising:
when the situation that the vehicle is in a braking condition is monitored, the state acquisition module acquires the state of the energy storage device;
correspondingly, the energy management module further includes: a control unit for controlling the operation of the display unit,
if the state of the energy storage device is charging permission, controlling a driving motor of the vehicle to work reversely and charging the energy storage device; otherwise, controlling the driving motor and the generator to work reversely and driving the engine to work.
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