CN113022359B - Electric vehicle charging and discharging control method and device, charging and discharging control equipment and medium - Google Patents

Electric vehicle charging and discharging control method and device, charging and discharging control equipment and medium Download PDF

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Publication number
CN113022359B
CN113022359B CN202110262359.6A CN202110262359A CN113022359B CN 113022359 B CN113022359 B CN 113022359B CN 202110262359 A CN202110262359 A CN 202110262359A CN 113022359 B CN113022359 B CN 113022359B
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charging
electric automobile
discharging
time
electric vehicle
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CN113022359A (en
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王艳飞
陈伟鹏
郝雪冬
胡成仁
杨斐平
朱睿
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Shaoguan Power Supply Bureau Guangdong Power Grid Co Ltd
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Shaoguan Power Supply Bureau Guangdong Power Grid Co Ltd
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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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/63—Monitoring or controlling charging stations in response to network capacity
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/64—Optimising energy costs, e.g. responding to electricity rates
    • 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
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • 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]
    • B60L58/13—Maintaining the SoC within a determined range
    • 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]
    • B60L58/14—Preventing excessive discharging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the invention discloses a method and a device for controlling charging and discharging of an electric automobile, charging and discharging control equipment and a medium. The electric vehicle charge and discharge control method comprises the following steps: the method comprises the steps of obtaining the arrival time of the electric automobile when the electric automobile arrives at a target place and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power; determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile; and controlling charging and discharging of the electric automobile according to the charging and discharging control state. According to the technical scheme of the embodiment of the invention, the charging and discharging intellectualization of the electric automobile is realized, the reliability of a power grid is improved, and meanwhile, the use cost of the electric automobile is reduced.

Description

Electric vehicle charging and discharging control method and device, charging and discharging control equipment and medium
Technical Field
The embodiment of the invention relates to the technical field of electric vehicle control, in particular to a method and a device for controlling charging and discharging of an electric vehicle, charging and discharging control equipment and a medium.
Background
At present, due to the advantages of low noise, environmental protection, economy and the like, the number of electric vehicles is increasing, and the number of urban electric vehicles is necessarily large-scale due to the support of national policies.
The electric automobile brings convenience to life of people, and brings huge challenges to the reliability of the power distribution network, especially in the peak period of power utilization, the electric automobile carries out unordered charging, the operation risk of the power distribution network is greatly increased, overload of a circuit and a transformer can be caused, and then the failure rate of equipment can be improved, so that the service life of the equipment is shortened, and the reliability of the power distribution network is reduced. The conventional electric automobile is usually charged orderly based on time-of-use electricity price, small-scale electricity utilization peaks can be caused, and the peak clipping and valley filling using effect of a power distribution network is not ideal.
Disclosure of Invention
The embodiment of the invention provides a charging and discharging control method and device, charging and discharging control equipment and a medium for an electric automobile, so that the charging and discharging of the electric automobile are intelligentized, the reliability of a power grid is improved, and the use cost of the electric automobile is reduced.
In a first aspect, an embodiment of the present invention provides a charge and discharge control method for an electric vehicle, where the charge and discharge control method for an electric vehicle includes:
the method comprises the steps of obtaining the arrival time of the electric automobile when the electric automobile arrives at a target place and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power;
determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile;
and controlling charging and discharging of the electric automobile according to the charging and discharging control state.
Further, before obtaining the arrival time of the electric vehicle and the battery state information when the electric vehicle arrives at the target location, the method further includes:
and determining the starting time of the power utilization valley period corresponding to the target place and the target vehicle utilization time of the electric vehicle.
Further, determining a charge and discharge control state corresponding to the electric vehicle according to the current discharge time and the arrival time of the electric vehicle, including:
and if the arrival time of the electric automobile is earlier than the power consumption valley period starting time and the current discharge time is longer than the discharge time threshold, determining that the charge-discharge control state corresponding to the electric automobile is the discharge state of the electric automobile.
Further, the control of charging and discharging the electric vehicle according to the charging and discharging control state includes:
and after the electric automobile is determined to be in a discharging state, controlling the electric automobile to discharge according to the current discharging time length.
Further, determining a charging and discharging control state corresponding to the electric vehicle according to the current discharging duration and the arrival time of the electric vehicle, including:
and if the arrival time of the electric automobile is later than the electricity consumption valley period starting time, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile.
Further, the control of charging and discharging the electric vehicle according to the charging and discharging control state includes:
after the electric automobile is determined to be in a charging state, determining a charging time corresponding to the electric automobile according to the current battery capacity and the battery charging and discharging power;
and controlling the electric automobile to charge according to the charging duration.
Further, controlling the electric vehicle to charge according to the charging time period comprises:
and determining the charging starting time of the electric automobile according to the target automobile using time and the charging duration, and controlling the electric automobile to be charged based on the charging starting time.
In a second aspect, an embodiment of the present invention further provides a charge and discharge control device for an electric vehicle, where the charge and discharge control device for an electric vehicle includes:
the system comprises an information acquisition module, a storage module and a processing module, wherein the information acquisition module is used for acquiring the arrival time of the electric automobile when the electric automobile arrives at a target location and battery state information, and the battery state information comprises the current battery capacity and the battery charging and discharging power;
the state determination module is used for determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile;
and the charge and discharge control module is used for controlling charge and discharge of the electric automobile according to the charge and discharge control state.
In a third aspect, an embodiment of the present invention further provides a charge and discharge control device, where the charge and discharge control device includes:
one or more processors;
a storage device for storing a plurality of programs,
when at least one of the programs is executed by the one or more processors, the one or more processors are enabled to implement the electric vehicle charging and discharging control method provided by the embodiment of the first aspect of the invention.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for controlling charging and discharging of an electric vehicle provided in the embodiment of the first aspect of the present invention is implemented.
According to the technical scheme of the embodiment of the invention, the arrival time of the electric automobile and the battery state information when the electric automobile arrives at the target location are obtained, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power; determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile; and controlling charging and discharging of the electric automobile according to the charging and discharging control state. The problem of the big and reliability reduction of electric wire netting service pressure that current electric automobile probably leads to is solved to realize electric automobile charge-discharge intellectuality, improve the electric wire netting reliability, simultaneously, reduce electric automobile's use cost.
Drawings
Fig. 1 is a flowchart of a charging and discharging control method for an electric vehicle according to a first embodiment of the present invention;
fig. 2 is a flowchart of a charging and discharging control method for an electric vehicle according to a second embodiment of the present invention;
fig. 3 is a flowchart of a charge and discharge control method for an electric vehicle according to a third embodiment of the present invention;
fig. 4 is a structural diagram of a charging and discharging control device of an electric vehicle according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of a charge and discharge control device according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. 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 but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a flowchart of a charging and discharging control method for an electric vehicle according to an embodiment of the present invention, where the method is applicable to effectively alleviate a "peak-up" condition of a power grid during a peak period of power consumption, and the method may be executed by a charging and discharging control device for an electric vehicle, and the charging and discharging control device for an electric vehicle may be implemented in a form of software and/or hardware. The method specifically comprises the following steps:
s110, obtaining the arrival time of the electric automobile when the electric automobile arrives at the target location and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power.
The target location may be a home, a work place, or any place where the electric vehicle can be charged and discharged, and the specific target location is determined by using an actual arrival location of the electric vehicle as the target location, which is not limited in this embodiment.
It can be understood that the electric vehicle realizes the corresponding charging and discharging functions with the target place through the existing charging and discharging machine, that is, the electric vehicle is electrically connected with the power distribution network through the charging and discharging machine at the home, the work place or any place where the electric vehicle can be charged and discharged, so as to realize the charging and discharging control of the electric vehicle corresponding to the embodiment of the invention.
The electric vehicle arrival time is a time corresponding to the electric vehicle arrival at the target location, and the electric vehicle arrival time specifically refers to a specific time point, for example, specific time points such as 16 points, 17 points, 15 minutes, and the like.
It can be understood that, the electric vehicle may have the arrival time written in by the user through the client, the terminal device, and other intelligent terminals, and transmit the data to the control end of the power grid, or have the power grid control end perform intelligent identification on the electric vehicle, which is not limited in this embodiment.
The battery state information corresponds to state information corresponding to a battery pack of the electric vehicle after the electric vehicle reaches the target location.
The battery state information includes the current battery capacity and the battery charging and discharging power, the battery state information also includes the battery load state, the charging time required by the battery can be further determined according to the battery load state, and the specific calculation method is explained by the following steps.
Further, before obtaining the arrival time of the electric vehicle and the battery state information when the electric vehicle arrives at the target location, the method further includes: and determining the starting time of the electricity consumption valley period corresponding to the target place and the target vehicle using time of the electric vehicle.
The starting time of the electricity consumption valley period is used for determining that the arrival time of the electric automobile is in the electricity consumption peak period or the valley period of the power grid, so that the current charging and discharging state of the electric automobile is selectively controlled according to the arrival time of the electric automobile and the starting time of the electricity consumption valley period.
The target vehicle-using time is written by the user through the client, the terminal device and other intelligent terminals, and is transmitted to the control end of the power grid, which is not limited in this embodiment
S120, determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile.
Determining the current discharge time of the electric automobile based on the current battery capacity and the battery charge-discharge power, wherein the current discharge time can be calculated according to the following formula:
Figure BDA0002970554560000071
wherein, T D The current discharge time length; d t The current battery capacity corresponding to the arrival time of the electric automobile; d is the lower limit value of the battery capacity of the electric automobile; p D Discharging power for the battery; eta d The discharge efficiency of the electric automobile is improved.
Illustratively, the modeling is performed for charging and discharging private electric vehicles in a certain region. If N electric vehicles are in the area and the electric vehicles are discharged at constant power when discharging, the discharge power is defined as P D . Considering that the electric vehicle cannot be over-discharged during V2G,defining the lower limit of the battery capacity of the electric automobile as D, and charging and discharging the electric automobile according to the following conditions:
Figure BDA0002970554560000072
it can be understood that, under the above conditions, if the current battery capacity is greater than the battery capacity lower limit, it is determined that the charge and discharge control state corresponding to the electric vehicle is the electric vehicle in the discharge state; if the current battery capacity is equal to the lower limit value of the battery capacity, determining that the charging and discharging control state corresponding to the electric automobile is an idle state of the electric automobile; and if the current battery capacity is smaller than the battery capacity lower limit value, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile.
In the embodiment, the current discharging time of the electric automobile is determined through the current battery capacity and the battery charging and discharging power, namely, the current battery capacity is determined to be larger than the lower limit value of the battery capacity, the current discharging time is further calculated, and the charging and discharging control state corresponding to the electric automobile is further accurately determined by combining the arrival time of the electric automobile, so that grid-connected discharging at the peak of a power grid is realized, the use cost of an automobile owner is saved, and the electric automobile is more economical.
Further, determining a charge and discharge control state corresponding to the electric vehicle according to the current discharge time and the arrival time of the electric vehicle, including: and if the arrival time of the electric automobile is earlier than the power consumption valley period starting time and the current discharge time is longer than the discharge time threshold, determining that the charge-discharge control state corresponding to the electric automobile is the discharge state of the electric automobile. And if the arrival time of the electric automobile is later than the electricity consumption valley period starting time, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile.
The discharging time length threshold is determined according to the lower limit value of the battery capacity, excessive discharging of the electric automobile is avoided due to the lower limit value of the battery capacity, and the discharging time length threshold can be determined through calculation on the basis of the lower limit value of the battery capacity.
It can be understood that the discharge duration threshold corresponds to a minimum value of a time length corresponding to the electric vehicle being in a discharge state, the discharge duration threshold may be selectively set by a person skilled in the art according to different vehicle types, and the specific value of the discharge duration threshold is not limited in any way in this embodiment.
And S130, controlling charging and discharging of the electric automobile according to the charging and discharging control state.
Specifically, if the arrival time of the electric vehicle is earlier than the power consumption valley period starting time and the current discharge time is longer than the discharge time threshold, it is determined that the charge and discharge control state corresponding to the electric vehicle is the discharge state of the electric vehicle. And after the electric automobile is determined to be in a discharging state, controlling the electric automobile to discharge according to the current discharging time length.
And if the arrival time of the electric automobile is later than the electricity consumption valley period starting time, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile. After the electric automobile is determined to be in a charging state, determining a charging time corresponding to the electric automobile according to the current battery capacity and the battery charging and discharging power; and controlling the electric automobile to charge according to the charging time length.
Further, controlling the electric vehicle to charge according to the charging time period comprises: and determining the charging starting time of the electric automobile according to the target vehicle using time and the charging duration, and controlling the electric automobile to be charged based on the charging starting time.
Illustratively, a day is 24 periods, assuming t 1 Arrival time of the electric vehicle, t 2 To the start of the power-on valley period, t 3 The target vehicle using time.
If the arrival time of the electric automobile is earlier than the starting time of the electricity consumption valley period, [ t ] 1 ,t 2 ]The period is the peak period of power utilization of the power grid, and the electric automobile can participate in discharging or be in an idle state at the periodThe current battery state of the electric automobile is determined in one step by combining the following conditions:
Figure BDA0002970554560000091
when t is reached 2 At the moment, the battery state corresponding to the electric automobile is read again, and the charging time T corresponding to the electric automobile is further determined according to the current battery capacity and the battery charging and discharging power t In the present embodiment by charging in reverse order, i.e. t 3 -T t And the charging starting time of the electric automobile is the actual charging starting time of the electric automobile.
If the arrival time of the electric automobile is later than the starting time of the electricity consumption valley period, [ t ] 2 ,t 3 ]The time interval is the power grid electricity consumption valley time interval, and this time interval electric automobile can participate in charging or idle state, can satisfy electric automobile in the electric automobile maximum charging duration in this time interval and charge.
It is understood that the charging time period required for the electric vehicle is related to the battery capacity of the electric vehicle before charging, the charging power of the electric vehicle, the driving distance of the electric vehicle on the day, the cruising ability, and the like, and the present embodiment will be specifically explained in the following embodiments, which will not be described herein again.
According to the technical scheme of the embodiment of the invention, the arrival time of the electric automobile and the battery state information when the electric automobile arrives at the target place are obtained, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power; determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile; and controlling charging and discharging of the electric automobile according to the charging and discharging control state. The problem of the big and reliability reduction of electric wire netting service pressure that current electric automobile probably leads to is solved to realize electric automobile charge-discharge intellectuality, improve the electric wire netting reliability, simultaneously, reduce electric automobile's use cost.
Example two
Fig. 2 is a flowchart of a charging and discharging control method for an electric vehicle according to a second embodiment of the present invention, which is optimized based on the second embodiment.
Correspondingly, the method of the embodiment specifically includes:
s210, determining the starting time of the electricity consumption valley period corresponding to the target place and the target vehicle using time of the electric vehicle.
S220, obtaining the arrival time of the electric automobile when the electric automobile arrives at the target location and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power.
And S230, determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power.
S240, if the arrival time of the electric automobile is earlier than the power consumption valley period starting time and the current discharging time is longer than a discharging time threshold, determining that the charging and discharging control state corresponding to the electric automobile is the discharging state of the electric automobile.
It can be understood that, if the current battery capacity is greater than the battery capacity lower limit value, that is, the current discharge duration is greater than the discharge duration threshold value, it is determined that the charge and discharge control state corresponding to the electric vehicle may be controlled to be the electric vehicle in the discharge state, but the electric vehicle may also be controlled to be in the idle state instead of controlling the electric vehicle to be in the discharge state. That is, when the above condition is satisfied, the electric vehicle may be selected to be in a discharge state or an idle state, but it is not limited that the electric vehicle is always in the discharge state when the above condition is satisfied.
And S250, after the electric automobile is determined to be in the discharging state, controlling the electric automobile to discharge according to the current discharging time length.
According to the technical scheme of the embodiment of the invention, when the arrival time of the electric automobile is earlier than the starting time of the electricity consumption valley period and the current discharge time is longer than the discharge time threshold, the electric automobile is controlled to enter a discharge state, namely, the electric automobile is discharged to a power grid, reasonable cost can be obtained, grid-connected discharge is realized at the peak time of power consumption of the power grid, the use cost of the electric automobile of an electric automobile owner is saved, and the electric automobile is more economic.
EXAMPLE III
Fig. 3 is a flowchart of a charge and discharge control method for an electric vehicle according to a third embodiment of the present invention, and the technical solution of the third embodiment of the present invention is further optimized based on the above embodiments. The method of the embodiment specifically includes:
and S310, determining the starting time of the electricity consumption valley period corresponding to the target place and the target vehicle using time of the electric vehicle.
S320, obtaining the arrival time of the electric automobile when the electric automobile arrives at the target location and battery state information, wherein the battery state information comprises the current battery capacity and the battery charge and discharge power.
It can be understood that the driving mileage, the time of starting charging and the required charging time of the electric vehicle vary according to the habits of the vehicle owner.
The initial charging time of the electric automobile and the initial State (SOC) of the battery have strong randomness, and the return time of the electric automobile of a user (namely the arrival time of the electric automobile) meets normal distribution, wherein the following formula is a probability density function of the return time:
Figure BDA0002970554560000121
in the formula, the mean value μ s Take 18, standard deviation σ s 1 is taken.
In addition, the daily mileage of the electric vehicle follows a lognormal distribution, and the probability density function is represented by the following formula:
Figure BDA0002970554560000122
in the formula, the expected value μ D Is 3.2, standard deviation σ D And was 0.88.
It can be understood that the probability density function f of the arrival time of the electric vehicle s (x) Probability density function f of mileage on daily basis D (x) Can reflect the electric automobile service behavior under the normal conditions, charge when the power consumption condition according to electric automobile is through when the electric wire netting power consumption level valley in this embodiment, discharge when the peak to electric wire netting circuit and equipment overload probability have been reduced, the electric wire netting reliability has been improved.
S330, determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power.
S340, if the arrival time of the electric automobile is later than the electricity consumption valley period starting time, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile.
And S350, after the electric automobile is determined to be in the charging state, determining the charging time corresponding to the electric automobile according to the current battery capacity and the battery charging and discharging power.
Specifically, the charging duration corresponding to the electric vehicle can be calculated by using the following formula:
Figure BDA0002970554560000131
in the formula, T c Is the charging time; p is c Charging power for the battery; s OC The load state of the electric automobile is the charging state of the electric automobile; b is C The battery capacity (kW. H) of the electric vehicle.
Further, the battery load state S of the electric vehicle OC The calculation formula is as follows according to the driving mileage of the electric vehicle on the day and the cruising ability of the electric vehicle:
Figure BDA0002970554560000132
in the formula, d 1 Show continuationNavigation capacity (km); d c Indicating daily mileage (km).
The two formulas are combined to obtain a charging duration probability density function of the electric automobile as
Figure BDA0002970554560000133
Simplifying to obtain:
Figure BDA0002970554560000134
and S360, controlling the electric automobile to charge according to the charging time length.
Further, controlling the electric vehicle to charge according to the charging duration includes: and determining the charging starting time of the electric automobile according to the target automobile using time and the charging duration, and controlling the electric automobile to be charged based on the charging starting time.
It can be understood that, in order to ensure that the charging process can be completed when the electric vehicle is used next time, the scheme of the embodiment passes through T c And calculating the charging starting time of the electric automobile for the charging time length and the target vehicle using time in a reverse order, so as to control the electric automobile to automatically start charging when the time reaches the charging starting time, namely the electric automobile automatically enters a charging state to start charging.
For example, if the target vehicle-using time is 7 am, and the charging time of the electric vehicle is one hour and twenty minutes, the charging start time of the electric vehicle may be calculated to be 5 am, 40 am of the next day, and when the charging start time is 5 am, 40 am of the next day, the electric vehicle automatically enters a charging state to start charging, so as to ensure that the electric vehicle has completed charging when the electric vehicle uses 7 am of the next day.
According to the technical scheme of the embodiment of the invention, when the arrival time of the electric automobile is later than the starting time of the electricity consumption valley period, the charging and discharging control state corresponding to the electric automobile is determined to be that the electric automobile is in a charging state, namely, the electric automobile is charged at low price in the electricity consumption valley of a power grid, so that a small-scale electricity consumption peak is avoided, the economy is improved, and meanwhile, a vehicle owner of the electric automobile can just fully charge the battery of the electric automobile when the vehicle is used next time by setting the vehicle reuse time, so that the humanization is improved.
Example four
Fig. 4 is a structural diagram of a charging and discharging control device for an electric vehicle according to a fourth embodiment of the present invention, which is applicable to effectively alleviate a peak-to-peak condition of a power grid during a peak period of power consumption.
As shown in fig. 4, the electric vehicle charge/discharge control apparatus includes: the information acquisition module 410, the state determination module 420 and the charge and discharge control module 430, wherein:
the information acquisition module 410 is configured to acquire an arrival time of the electric vehicle when the electric vehicle arrives at a target location and battery state information, where the battery state information includes a current battery capacity and a battery charge/discharge power;
a state determining module 420, configured to determine a current discharging duration of the electric vehicle based on the current battery capacity and the battery charging and discharging power, and determine a charging and discharging control state corresponding to the electric vehicle according to the current discharging duration and the arrival time of the electric vehicle;
and the charge and discharge control module 430 is used for controlling charge and discharge of the electric automobile according to the charge and discharge control state.
The electric vehicle charging and discharging control device of the embodiment obtains the arrival time of the electric vehicle when the electric vehicle arrives at a target location and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power; determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile; and controlling charging and discharging of the electric automobile according to the charging and discharging control state. The problem of the big and reliability reduction of electric wire netting service pressure that current electric automobile probably leads to is solved to realize electric automobile charge-discharge intellectuality, improve the electric wire netting reliability, simultaneously, reduce electric automobile's use cost.
In addition to the above embodiments, before obtaining the electric vehicle arrival time and the battery state information when the electric vehicle arrives at the target location, the method further includes:
and determining the starting time of the electricity consumption valley period corresponding to the target place and the target vehicle using time of the electric vehicle.
On the basis of the foregoing embodiments, determining the charge and discharge control state corresponding to the electric vehicle according to the current discharge time and the arrival time of the electric vehicle includes:
and if the arrival time of the electric automobile is earlier than the power consumption valley period starting time and the current discharge time is longer than the discharge time threshold, determining that the charge-discharge control state corresponding to the electric automobile is the discharge state of the electric automobile.
In addition to the above embodiments, the method for controlling charging and discharging of the electric vehicle according to the charge and discharge control state includes:
and after the electric automobile is determined to be in a discharging state, controlling the electric automobile to discharge according to the current discharging time length.
On the basis of the foregoing embodiments, determining the charge and discharge control state corresponding to the electric vehicle according to the current discharge time and the arrival time of the electric vehicle includes:
and if the arrival time of the electric automobile is later than the electricity consumption valley period starting time, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile.
In addition to the above embodiments, the electric vehicle charge/discharge control according to the charge/discharge control state includes:
after the electric automobile is determined to be in a charging state, determining a charging time corresponding to the electric automobile according to the current battery capacity and the battery charging and discharging power;
and controlling the electric automobile to charge according to the charging time length.
On the basis of the above embodiments, controlling the electric vehicle to charge according to the charging duration includes:
and determining the charging starting time of the electric automobile according to the target automobile using time and the charging duration, and controlling the electric automobile to be charged based on the charging starting time.
The electric vehicle charging and discharging control device provided by each embodiment can execute the electric vehicle charging and discharging control method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the electric vehicle charging and discharging control method.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a charging and discharging control apparatus according to a fifth embodiment of the present invention, as shown in fig. 5, the charging and discharging control apparatus includes a processor 510, a memory 520, an input device 530, and an output device 540; the number of the processors 510 in the charging and discharging control device may be one or more, and one processor 510 is taken as an example in fig. 5; the processor 510, the memory 520, the input device 530, and the output device 540 in the charge and discharge control apparatus may be connected by a bus or other means, and fig. 5 illustrates an example of connection by a bus.
The memory 520 may be used as a computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the charging and discharging control method for an electric vehicle in the embodiment of the present invention (for example, the information obtaining module 410, the state determining module 420, and the charging and discharging control module 430 in the charging and discharging control device for an electric vehicle). The processor 510 executes various functional applications and data processing of the charging and discharging control device by running software programs, instructions and modules stored in the memory 520, so as to implement the charging and discharging control method of the electric vehicle.
The memory 520 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 520 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 520 may further include memory remotely located from the processor 510, which may be connected to the charge and discharge control device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 530 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the charge and discharge control apparatus. The output device 540 may include a display device such as a display screen.
EXAMPLE six
The sixth embodiment of the present invention further provides a storage medium containing computer-executable instructions, where the computer-executable instructions are executed by a computer processor to perform a method for controlling charging and discharging of an electric vehicle, where the method for controlling charging and discharging of an electric vehicle includes:
the method comprises the steps of obtaining the arrival time of the electric automobile when the electric automobile arrives at a target place and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power;
determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile;
and controlling charging and discharging of the electric automobile according to the charging and discharging control state.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the electric vehicle charging and discharging control method provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the electric vehicle charge and discharge control device, the included units and modules are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be 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 (8)

1. A charge and discharge control method for an electric vehicle is characterized by comprising the following steps:
the method comprises the steps of obtaining the arrival time of the electric automobile when the electric automobile arrives at a target place and battery state information, wherein the battery state information comprises the current battery capacity and the battery charging and discharging power;
determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile;
controlling charging and discharging of the electric automobile according to the charging and discharging control state;
before obtaining the arrival time of the electric vehicle and the battery state information when the electric vehicle arrives at the target location, the method further comprises the following steps:
determining a power consumption valley period starting moment corresponding to the target place and a target vehicle using moment of the electric vehicle;
determining a charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile, wherein the method comprises the following steps:
and if the arrival time of the electric automobile is earlier than the power consumption valley period starting time and the current discharge time is longer than the discharge time threshold, determining that the charge-discharge control state corresponding to the electric automobile is the discharge state of the electric automobile.
2. The electric vehicle charge/discharge control method according to claim 1, wherein controlling charge/discharge of the electric vehicle in accordance with the charge/discharge control state includes:
and after the electric automobile is determined to be in a discharging state, controlling the electric automobile to discharge according to the current discharging time length.
3. The electric vehicle charging and discharging control method according to claim 1, wherein determining the charging and discharging control state corresponding to the electric vehicle according to the current discharging time and the electric vehicle arrival time comprises:
and if the arrival time of the electric automobile is later than the electricity consumption valley period starting time, determining that the charging and discharging control state corresponding to the electric automobile is the charging state of the electric automobile.
4. The electric vehicle charge/discharge control method according to claim 3, wherein controlling charge/discharge of the electric vehicle in accordance with the charge/discharge control state includes:
after the electric automobile is determined to be in a charging state, determining a charging time corresponding to the electric automobile according to the current battery capacity and the battery charging and discharging power;
and controlling the electric automobile to charge according to the charging duration.
5. The electric vehicle charging and discharging control method according to claim 4, wherein controlling the electric vehicle to be charged according to the charging period comprises:
and determining the charging starting time of the electric automobile according to the target automobile using time and the charging duration, and controlling the electric automobile to be charged based on the charging starting time.
6. A charge and discharge control device for an electric vehicle, comprising:
the system comprises an information acquisition module, a storage module and a processing module, wherein the information acquisition module is used for acquiring the arrival time of the electric automobile when the electric automobile arrives at a target location and battery state information, and the battery state information comprises the current battery capacity and the battery charging and discharging power;
the state determination module is used for determining the current discharging time of the electric automobile based on the current battery capacity and the battery charging and discharging power, and determining the charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile;
the charging and discharging control module is used for controlling the charging and discharging of the electric automobile according to the charging and discharging control state;
before obtaining the arrival time of the electric vehicle and the battery state information when the electric vehicle arrives at the target location, the method further comprises the following steps:
determining a power consumption valley period starting moment corresponding to the target place and a target vehicle using moment of the electric vehicle;
determining a charging and discharging control state corresponding to the electric automobile according to the current discharging time and the arrival time of the electric automobile, wherein the method comprises the following steps:
and if the arrival time of the electric automobile is earlier than the power consumption valley period starting time and the current discharge time is longer than the discharge time threshold, determining that the charge-discharge control state corresponding to the electric automobile is the discharge state of the electric automobile.
7. A charge-discharge control device, characterized by comprising:
one or more processors;
storage means 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 are caused to implement the electric vehicle charging and discharging control method according to any one of claims 1 to 5.
8. A computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the electric vehicle charging and discharging control method according to any one of claims 1 to 5.
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