CN116512975A - Discharge control method, device, equipment and storage medium based on V2G - Google Patents
Discharge control method, device, equipment and storage medium based on V2G Download PDFInfo
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- CN116512975A CN116512975A CN202310373453.8A CN202310373453A CN116512975A CN 116512975 A CN116512975 A CN 116512975A CN 202310373453 A CN202310373453 A CN 202310373453A CN 116512975 A CN116512975 A CN 116512975A
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000007599 discharging Methods 0.000 claims abstract description 123
- 238000013507 mapping Methods 0.000 claims abstract description 11
- 238000004590 computer program Methods 0.000 claims description 16
- 230000015654 memory Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
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- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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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
- 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
- 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
-
- 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
-
- 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
- H02J7/00304—Overcurrent protection
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- 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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- 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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
- H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a discharge control method, a device, equipment and a storage medium based on V2G, wherein the discharge control method based on V2G comprises the following steps: obtaining the maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle; determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile; searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table; determining a target discharge current according to the maximum allowable discharge current of the charging pile and the discharge coefficient; and discharging the charging pile according to the target discharging current. Through the technical scheme of the application, the stability and the safety of the V2G in the discharging process can be improved.
Description
Technical Field
The application belongs to the technical field of V2G, and particularly relates to a discharge control method, device and equipment based on V2G and a storage medium.
Background
With the development of new energy technology, the technology of electric vehicles for power transmission (V2G) of power Grid receives a great deal of attention, and the energy conversion between the electric vehicles and the power Grid is realized by discharging the electric vehicles as power sources to the charging piles, which makes a great contribution to the regulation and stability of the power Grid.
In general, the maximum discharge current can be calibrated when the charging pile leaves a factory, so that the discharge current only needs to be smaller than the maximum discharge current when the charging pile is discharged by the existing electric automobile.
Disclosure of Invention
The embodiment of the application provides a discharge control method, a device, equipment and a storage medium based on V2G, so that stability and safety in the V2G discharge process can be improved.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned in part by the practice of the application.
According to a first aspect of embodiments of the present application, there is provided a V2G-based discharge control method applied to a vehicle including a battery and a charging port for connection with a charging pile, the V2G-based discharge control method including:
obtaining the maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle;
determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile;
searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table;
determining a target discharge current according to the maximum allowable discharge current of the charging pile and the discharge coefficient;
and discharging the charging pile according to the target discharging current.
In some embodiments of the present application, based on the foregoing solution, obtaining the maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle includes:
obtaining the maximum allowable discharge current of the battery from a discharge power meter of the battery;
obtaining the consumption current of the vehicle according to the consumption power of the vehicle and the current voltage of the battery;
and determining the difference between the maximum allowable discharge current of the battery and the consumption current of the vehicle as the maximum allowable discharge current of the vehicle.
In some embodiments of the present application, based on the foregoing solution, the determining the maximum allowable discharge current of the charging stake according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging stake includes:
obtaining the maximum limit discharge current of a charging pile specified by national standards;
and determining the minimum value among the maximum allowable discharge current of the vehicle, the maximum discharge current of the charging pile and the maximum limit discharge current as the maximum allowable discharge current of the charging pile.
In some embodiments of the present application, based on the foregoing aspect, before the discharging the charging pile according to the target discharging current, the method further includes:
acquiring the upper voltage limit value and the lower voltage limit value of the charging pile;
outputting discharge prohibition information when the current voltage of the battery is greater than the upper voltage limit value or less than the lower voltage limit value, otherwise, executing the step of discharging the charging pile according to the target discharge current.
In some embodiments of the present application, based on the foregoing aspect, after the discharging the charging pile according to the target discharging current, the method further includes:
acquiring a discharge control instruction and the current residual electric quantity of the battery;
and stopping discharging the charging pile under the condition that the current voltage, the discharging control instruction or the current residual electric quantity meets a preset condition.
In some embodiments of the present application, based on the foregoing aspect, after the discharging the charging pile according to the target discharging current, the method further includes:
acquiring the current discharging current of the charging pile and the current discharging current of the battery;
subtracting the current discharging current of the battery from the current discharging current of the charging pile in sequence to obtain a current difference;
and stopping discharging the charging pile under the condition that the current difference lasts for a first preset time to be larger than a preset value.
In some embodiments of the present application, based on the foregoing aspect, after the discharging the charging pile according to the target discharging current, the method further includes:
acquiring the minimum discharge current of the charging pile and the current discharge current of the battery;
and stopping discharging the charging pile under the condition that the difference value between the current discharging current of the battery and the consumed current is smaller than or equal to the minimum discharging current for a second preset time.
According to a second aspect of embodiments of the present application, there is provided a V2G-based discharge control device applied to a vehicle including a battery and a charging port for connection with a charging stake, the V2G-based discharge control device including:
a vehicle end discharge current determining unit, configured to obtain a maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle;
the pile end discharge current determining unit is used for determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile;
the discharging coefficient determining unit is used for searching the discharging coefficient corresponding to the temperature of the charging port from a preset mapping table;
a target discharge current determining unit, configured to determine a target discharge current according to the maximum allowable discharge current of the charging pile and the discharge coefficient;
and the discharging unit is used for discharging the charging pile according to the target discharging current.
According to a third aspect of embodiments of the present application, there is provided a V2G-based discharge control device, the V2G-based discharge control device comprising a memory storing a computer program and a processor implementing the steps of the above-mentioned method when the processor executes the computer program.
According to a fourth aspect of embodiments of the present application, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method described above.
In the present application, the maximum allowable discharge current of the vehicle is obtained by according to the maximum allowable discharge current of the battery and the consumption current of the vehicle; determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile; searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table; determining a target discharge current according to the maximum allowable discharge current of the charging pile and the discharge coefficient; and discharging the charging pile according to the target discharging current, so that the stability and safety of the V2G discharging process are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is an application environment diagram of a V2G-based discharge control method in one embodiment;
FIG. 2 is a flow chart of a discharge control method based on V2G according to an embodiment;
FIG. 3 is a flow chart of a discharge control method based on V2G according to another embodiment;
FIG. 4 is a flow chart of a discharge control method based on V2G according to another embodiment;
FIG. 5 is a flow chart of a discharge control method based on V2G according to another embodiment;
FIG. 6 is a flow chart of a discharge control method based on V2G according to another embodiment;
FIG. 7 is a block diagram of a V2G-based discharge control device in one embodiment;
fig. 8 is an internal structural diagram of a V2G-based discharge control apparatus in one embodiment.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the aspects of the application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used may be interchanged where appropriate such that the embodiments of the present application described herein may be implemented in sequences other than those illustrated or described.
The discharge control method based on the V2G can be applied to an application environment shown in fig. 1. When the electric automobile 102 is connected with the charging pile 104, not only charging of the electric automobile 102 but also discharging of the electric automobile 102 can be realized, namely, electric energy of a power battery in the electric automobile 102 is released to participate in power grid load adjustment.
In one embodiment, as shown in fig. 2, there is provided a V2G-based discharge control method, which is exemplified as being applied to the vehicle in fig. 1, the vehicle including a battery and a charging port for connection with a charging pile, the method may include the steps of:
step 201, obtaining the maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle.
The consumed current refers to the current consumed by high-voltage accessories such as an air conditioner of a vehicle, a direct-current transformer and the like.
Specifically, the vehicle may calculate the maximum allowable discharge current of the vehicle from the difference between the maximum allowable discharge current of the battery and the consumption current of the vehicle. In one example, the vehicle may obtain a maximum allowable discharge current of the battery from a discharge power meter of the battery; obtaining the consumption current of the vehicle according to the consumption power of the vehicle and the current voltage of the battery; the difference between the maximum allowable discharge current of the battery and the consumption current of the vehicle is determined as the maximum allowable discharge current of the vehicle.
It should be understood that a battery's discharge power meter is typically stored in the vehicle, with corresponding discharge current values for different cell voltages and different temperature conditions recorded therein. Thus, the maximum allowable discharge current of the vehicle can be determined from the discharge power meter.
Further, as is known from the formula p=ui of the power calculation, the consumed power of the vehicle is divided by the current voltage of the battery, and the consumed current of the vehicle can be obtained. Therefore, the consumption current of the vehicle can be obtained from the consumption power of the vehicle and the current voltage of the battery.
Step 202, determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile.
It should be understood that the charging pile may be rated for a maximum discharge current when shipped from the factory, the vehicle may obtain the maximum discharge current of the charging pile by communicating with the charging pile, and then a smaller value between the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile is selected as the maximum allowable discharge current of the charging pile.
In other examples, the vehicle may also obtain a maximum limit discharge current for the charging stake specified by national standards; and determining the minimum value among the maximum allowable discharge current of the vehicle, the maximum discharge current of the charging pile and the maximum limit discharge current as the maximum allowable discharge current of the charging pile.
The national standard GB/T18487.1-2015 considers the current carrying capacity of the quick charge cable and the charging seat, and prescribes that the maximum limit discharge current of the charging pile is 250A, so that the discharge current needs to be less than 250A when the vehicle discharges the charging pile. According to the embodiment, the maximum allowable discharge current of the charging pile is obtained by comprehensively considering the discharge capacity of the vehicle end, the discharge capacity of the pile end and the limitation of national standards, and the maximum allowable discharge current of the charging pile is obtained by comprehensively calculating the minimum value of the discharge capacity of the vehicle end, the discharge capacity of the pile end and the limitation of national standards, so that the discharge safety is improved.
Step 203, searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table.
In consideration of the problem of the overheat of the charging port during the discharging, the derating discharge is required, and thus the discharge coefficient of the discharge current needs to be determined. In one example, different discharge coefficients corresponding to different temperatures may be recorded in the preset mapping table, for example, when the temperature of the charging port is less than 93 ℃, the discharge coefficient is 1.0; when the temperature of the charging port is 95-105 ℃, the discharge coefficient is 0.8; when the temperature of the charging port is 108-119 ℃, the discharge coefficient is 0.5; when the temperature of the charging port exceeds 120 ℃, the machine is stopped at an over-temperature state, and the discharge current coefficient is 0. Thus, after the temperature of the charging port is obtained, the corresponding discharge coefficient can be obtained according to the temperature lookup table.
And 204, determining a target discharge current according to the maximum allowable discharge current and the discharge coefficient of the charging pile.
Specifically, the target discharge current may be obtained according to a maximum allowable discharge current and a discharge coefficient of the charging pile and a preset formula. The preset formula may be various, and in one example, the maximum allowable discharge current of the charging pile may be directly multiplied by the discharge coefficient to obtain the target discharge current.
And step 205, discharging the charging pile according to the target discharging current.
It should be understood that the target discharge current calculated by the discharge coefficient is utilized to de-rate the charging pile, so that the over-temperature of the charging port can be effectively prevented, and the safety of discharge is improved.
According to the embodiment, the maximum allowable discharge current of the vehicle is obtained according to the maximum allowable discharge current of the battery and the consumption current of the vehicle; determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile; searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table; determining a target discharge current according to the maximum allowable discharge current and the discharge coefficient of the charging pile; and discharging the charging pile according to the target discharging current. The method comprises the steps of calculating target discharge current by comprehensively considering factors such as the discharge capacity of a battery, the consumption of the whole vehicle, the discharge capacity of a charging pile, the temperature of a charging port and the like, and discharging the charging pile by using the calculated target discharge current, so that the stability and the safety in the discharging process are ensured.
Fig. 3 is a flow chart of a discharge control method based on V2G in another embodiment, as shown in fig. 3, the discharge control method based on V2G may further include the following steps:
step 301, obtaining an upper voltage limit value and a lower voltage limit value of a charging pile;
step 302, outputting discharge prohibition information in case that the current voltage of the battery is greater than the upper voltage limit value or less than the lower voltage limit value, otherwise, performing a step of discharging the charging pile according to the target discharge current.
It should be understood that before entering the discharging process, it is necessary to check that the current voltage of the battery at the vehicle end matches the voltage range of the charging pile, the vehicle obtains the upper voltage limit value and the lower voltage limit value of the charging pile by communicating with the charging pile, and if the current voltage of the battery is higher than the upper voltage limit value of the charging pile or the current voltage of the battery is lower than the lower voltage limit value of the charging pile, the vehicle end determines that the vehicle pile voltage is not matched, and outputs discharge prohibition information to prohibit entering the discharging process. If the current voltage of the battery is between the upper voltage limit value and the lower voltage limit value, a discharging process is entered.
According to the embodiment, the current voltage of the battery at the vehicle end is checked to be matched with the voltage range of the charging pile, and different discharging strategies are adopted according to the matching conditions, so that the discharging efficiency is improved.
Fig. 4 is a schematic flow chart of a V2G-based discharge control method according to another embodiment, as shown in fig. 4, the V2G-based discharge control method may further include the following steps:
step 401, obtaining a discharge control instruction and the current residual capacity of a battery;
and step 402, stopping discharging the charging pile under the condition that the current voltage, the discharging control instruction or the current residual electric quantity meets the preset condition.
The discharging control instruction refers to an instruction for starting or ending discharging sent by a user through a fixing operation at the pile end or the vehicle end, for example, the user can send an instruction for actively ending a discharging flow through a card swiping operation at the pile end.
Specifically, after entering a discharge flow, the vehicle end stops the discharge flow when the current voltage is smaller than or equal to the lower voltage limit value of the charging pile or the single voltage value of the discharge cut-off is reached; when the discharge control instruction is to end the discharge flow, stopping the discharge flow by the vehicle end; when the current remaining power reaches a discharge cutoff condition, for example, 10%, the vehicle end stops the discharge flow.
According to the embodiment, under the condition that the current voltage, the discharge control instruction or the current residual electric quantity meets the preset condition, the discharge of the charging pile is stopped, the real-time control of the discharge process according to the vehicle condition is realized, and the stability of the discharge process is improved.
Fig. 5 is a schematic flow chart of a V2G-based discharge control method according to another embodiment, as shown in fig. 5, the V2G-based discharge control method may further include the following steps:
step 501, obtaining the current discharging current of a charging pile and the current discharging current of a battery;
step 502, subtracting the current discharging current of the charging pile from the current discharging current of the battery in sequence to obtain a current difference;
in step 503, if the current difference lasts for a first preset time greater than a preset value, discharging the charging pile is stopped.
It should be understood that the vehicle end can monitor the current discharging current of the battery in real time, the charging pile also detects the current discharging current of the pile end and sends the current discharging current to the vehicle end through the fast charging bus, and when the current difference lasts for a first preset time to be greater than a preset value, the vehicle end judges that the discharging current is over-current, and the discharging process is ended. Taking the first preset time as 5s and the preset value as 5A as an example, if the current difference is greater than 5A and lasts for 5s, the discharge flow is ended.
The embodiment realizes the discharge overcurrent protection of the battery by the vehicle end in the discharge process, and ensures the safety of the discharge process.
Fig. 6 is a schematic flow chart of a V2G-based discharge control method according to another embodiment, as shown in fig. 6, the V2G-based discharge control method may further include the following steps:
step 601, obtaining the minimum discharge current of a charging pile and the current discharge current of a battery;
and step 602, stopping discharging the charging pile when the difference value between the current discharging current and the consumed current of the battery continues for a second preset time to be less than or equal to the minimum discharging current.
Considering that the discharging capacity of the battery is reduced when the residual electric quantity of the battery is low in the discharging process, the vehicle end can obtain the minimum discharging current of the charging pile through communication with the charging pile, and when the difference value between the current discharging current and the consumed current of the battery is continuously smaller than or equal to the minimum discharging current for a second preset time, the vehicle end is judged to reach the minimum discharging capacity limit of the pile end, and the discharging process is ended. Taking the second preset time as an example of 5s, when the difference value is smaller than or equal to the minimum discharge current and lasts for 5s, the discharge flow is ended.
The embodiment realizes that the discharging process is finished in time after the discharging capability of the battery is reduced to be incapable of meeting the requirement in the discharging process, and ensures the stability of the discharging process.
It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the present application also provides a V2G-based discharge control device applied to a vehicle, the vehicle including a battery and a charging port for connection with a charging pile, as shown in fig. 7, the V2G-based discharge control device includes: a vehicle end discharge current determining unit 701, configured to obtain a maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle; a pile tip discharge current determining unit 702, configured to determine a maximum allowable discharge current of the charging pile according to a maximum allowable discharge current of the vehicle and a maximum discharge current of the charging pile; a discharge coefficient determining unit 703, configured to find a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table; a target discharge current determining unit 704, configured to determine a target discharge current according to a maximum allowable discharge current and a discharge coefficient of the charging pile; and a discharging unit 705 for discharging the charging pile according to the target discharging current.
In some embodiments of the present application, based on the foregoing solution, the vehicle end discharge current determining unit 701 is further configured to obtain a maximum allowable discharge current of the battery from a discharge power meter of the battery; obtaining the consumption current of the vehicle according to the consumption power of the vehicle and the current voltage of the battery; the difference between the maximum allowable discharge current of the battery and the consumption current of the vehicle is determined as the maximum allowable discharge current of the vehicle.
In some embodiments of the present application, based on the foregoing solution, the pile tip discharge current determining unit 702 is further configured to obtain a maximum limit discharge current of the charging pile specified by the national standard; and determining the minimum value among the maximum allowable discharge current of the vehicle, the maximum discharge current of the charging pile and the maximum limit discharge current as the maximum allowable discharge current of the charging pile.
In some embodiments of the present application, based on the foregoing solution, the V2G-based discharge control device further includes: a discharge protection unit (not shown) for acquiring a voltage upper limit value and a voltage lower limit value of the charging pile; outputting discharge prohibition information in case that the current voltage of the battery is greater than the upper voltage limit value or less than the lower voltage limit value, otherwise, performing the step of discharging the charging pile according to the target discharge current.
In some embodiments of the present application, based on the foregoing solution, the discharge protection unit is further configured to obtain a discharge control instruction and a current remaining power of the battery; and stopping discharging the charging pile under the condition that the current voltage, the discharging control instruction or the current residual electric quantity meets the preset condition.
In some embodiments of the present application, based on the foregoing solution, the discharge protection unit is further configured to obtain a current discharge current of the charging pile and a current discharge current of the battery; subtracting the current discharging current of the charging pile from the current discharging current of the battery in sequence to obtain a current difference; and stopping discharging the charging pile under the condition that the current difference lasts for a first preset time to be larger than a preset value.
In some embodiments of the present application, based on the foregoing solution, the discharge protection unit is further configured to obtain a minimum discharge current of the charging pile and a current discharge current of the battery; and stopping discharging the charging pile under the condition that the difference value between the current discharging current and the consumed current of the battery is smaller than or equal to the minimum discharging current for a second preset time.
Each of the modules in the V2G-based discharge control apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Based on the same inventive concept, the embodiment of the application also provides a discharge control device based on V2G. Fig. 8 is an internal structural diagram of a V2G-based discharge control apparatus in one embodiment, and as shown in fig. 8, the V2G-based discharge control apparatus includes one or more memories 804, one or more processors 802, and at least one computer program (program code) stored on the memories 804 and executable on the processors 802, where the processors 802 implement a V2G-based discharge control method as before when executing the computer program.
Where in FIG. 8, a bus architecture (represented by bus 800), bus 800 may include any number of interconnected buses and bridges, with bus 800 linking together various circuits, including one or more processors, as represented by processor 802, and memory, as represented by memory 804. Bus 800 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. Bus interface 805 provides an interface between bus 800 and receiver 801 and transmitter 803. The receiver 801 and the transmitter 803 may be the same element, i.e. a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 802 is responsible for managing the bus 800 and general processing, while the memory 804 may be used to store data used by the processor 802 in performing operations.
It will be appreciated by those skilled in the art that the structure shown in fig. 8 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation of the V2G-based discharge control apparatus to which the present application is applied, and that a specific V2G-based discharge control apparatus may include more or less components than those shown in the drawings, or may combine certain components, or have different arrangements of components.
Based on the same inventive concept, the embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
obtaining the maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle;
determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile;
searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table;
determining a target discharge current according to the maximum allowable discharge current and the discharge coefficient of the charging pile;
and discharging the charging pile according to the target discharging current.
In one embodiment, the computer program when executed by the processor further performs the steps of: obtaining the maximum allowable discharge current of the battery from a discharge power meter of the battery; obtaining the consumption current of the vehicle according to the consumption power of the vehicle and the current voltage of the battery; the difference between the maximum allowable discharge current of the battery and the consumption current of the vehicle is determined as the maximum allowable discharge current of the vehicle.
In one embodiment, the computer program when executed by the processor further performs the steps of: obtaining the maximum limit discharge current of a charging pile specified by national standards; and determining the minimum value among the maximum allowable discharge current of the vehicle, the maximum discharge current of the charging pile and the maximum limit discharge current as the maximum allowable discharge current of the charging pile.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the upper voltage limit value and the lower voltage limit value of the charging pile; outputting discharge prohibition information in case that the current voltage of the battery is greater than the upper voltage limit value or less than the lower voltage limit value, otherwise, performing the step of discharging the charging pile according to the target discharge current.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a discharge control instruction and the current residual capacity of the battery; and stopping discharging the charging pile under the condition that the current voltage, the discharging control instruction or the current residual electric quantity meets the preset condition.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the current discharging current of the charging pile and the current discharging current of the battery; subtracting the current discharging current of the charging pile from the current discharging current of the battery in sequence to obtain a current difference; and stopping discharging the charging pile under the condition that the current difference lasts for a first preset time to be larger than a preset value.
In one embodiment, the computer program when executed by the processor further performs the steps of: obtaining the minimum discharge current of the charging pile and the current discharge current of the battery; and stopping discharging the charging pile under the condition that the difference value between the current discharging current and the consumed current of the battery is smaller than or equal to the minimum discharging current for a second preset time.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software that is executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate components may or may not be physically separate, and components as control devices may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely exemplary of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A V2G-based discharge control method applied to a vehicle including a battery and a charging port for connection with a charging pile, the V2G-based discharge control method comprising:
obtaining the maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle;
determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile;
searching a discharge coefficient corresponding to the temperature of the charging port from a preset mapping table;
determining a target discharge current according to the maximum allowable discharge current of the charging pile and the discharge coefficient;
and discharging the charging pile according to the target discharging current.
2. The V2G-based discharge control method according to claim 1, wherein the obtaining the maximum allowable discharge current of the vehicle from the maximum allowable discharge current of the battery and the consumption current of the vehicle includes:
obtaining the maximum allowable discharge current of the battery from a discharge power meter of the battery;
obtaining the consumption current of the vehicle according to the consumption power of the vehicle and the current voltage of the battery;
and determining the difference between the maximum allowable discharge current of the battery and the consumption current of the vehicle as the maximum allowable discharge current of the vehicle.
3. The V2G-based discharge control method according to claim 1, wherein the determining the maximum allowable discharge current of the charging stake according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging stake includes:
obtaining the maximum limit discharge current of a charging pile specified by national standards;
and determining the minimum value among the maximum allowable discharge current of the vehicle, the maximum discharge current of the charging pile and the maximum limit discharge current as the maximum allowable discharge current of the charging pile.
4. The V2G-based discharge control method according to claim 1, wherein before the discharging of the charging pile according to the target discharge current, the method further comprises:
acquiring the upper voltage limit value and the lower voltage limit value of the charging pile;
outputting discharge prohibition information when the current voltage of the battery is greater than the upper voltage limit value or less than the lower voltage limit value, otherwise, executing the step of discharging the charging pile according to the target discharge current.
5. The V2G-based discharge control method according to claim 4, further comprising, after the discharging the charging pile according to the target discharge current:
acquiring a discharge control instruction and the current residual electric quantity of the battery;
and stopping discharging the charging pile under the condition that the current voltage, the discharging control instruction or the current residual electric quantity meets a preset condition.
6. The V2G-based discharge control method according to claim 4, further comprising, after the discharging the charging pile according to the target discharge current:
acquiring the current discharging current of the charging pile and the current discharging current of the battery;
subtracting the current discharging current of the battery from the current discharging current of the charging pile in sequence to obtain a current difference;
and stopping discharging the charging pile under the condition that the current difference lasts for a first preset time to be larger than a preset value.
7. The V2G-based discharge control method according to claim 4, further comprising, after the discharging the charging pile according to the target discharge current:
acquiring the minimum discharge current of the charging pile and the current discharge current of the battery;
and stopping discharging the charging pile under the condition that the difference value between the current discharging current of the battery and the consumed current is smaller than or equal to the minimum discharging current for a second preset time.
8. A V2G-based discharge control device applied to a vehicle including a battery and a charging port for connection with a charging stake, characterized in that the V2G-based discharge control device includes:
a vehicle end discharge current determining unit, configured to obtain a maximum allowable discharge current of the vehicle according to the maximum allowable discharge current of the battery and the consumption current of the vehicle;
the pile end discharge current determining unit is used for determining the maximum allowable discharge current of the charging pile according to the maximum allowable discharge current of the vehicle and the maximum discharge current of the charging pile;
the discharging coefficient determining unit is used for searching the discharging coefficient corresponding to the temperature of the charging port from a preset mapping table;
a target discharge current determining unit, configured to determine a target discharge current according to the maximum allowable discharge current of the charging pile and the discharge coefficient;
and the discharging unit is used for discharging the charging pile according to the target discharging current.
9. V2G-based discharge control device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when executing the computer program.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| CN202310373453.8A CN116512975A (en) | 2023-04-10 | 2023-04-10 | Discharge control method, device, equipment and storage medium based on V2G |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310373453.8A CN116512975A (en) | 2023-04-10 | 2023-04-10 | Discharge control method, device, equipment and storage medium based on V2G |
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