CN110103766A - Vehicle-based charge and discharge system and control method thereof - Google Patents
Vehicle-based charge and discharge system and control method thereof Download PDFInfo
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- CN110103766A CN110103766A CN201910367320.3A CN201910367320A CN110103766A CN 110103766 A CN110103766 A CN 110103766A CN 201910367320 A CN201910367320 A CN 201910367320A CN 110103766 A CN110103766 A CN 110103766A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007600 charging Methods 0.000 claims abstract description 89
- 238000007599 discharging Methods 0.000 claims abstract description 58
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 30
- 238000012546 transfer Methods 0.000 claims abstract description 27
- 238000004146 energy storage Methods 0.000 claims abstract description 26
- 238000012790 confirmation Methods 0.000 claims abstract description 21
- 230000005611 electricity Effects 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 239000013256 coordination polymer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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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
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- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a vehicle-based charging and discharging system and a control method thereof. Wherein, charge-discharge system of vehicle includes: the vehicle assembly comprises a power battery and a vehicle-mounted bidirectional charger and is used for generating a request signal when the external discharge is needed and discharging the power battery through the vehicle-mounted bidirectional charger when a discharge confirmation is received; the charging and discharging equipment is communicated with the vehicle assembly, receives a request signal sent by the vehicle assembly, feeds back a discharging confirmation to the vehicle assembly when the request signal is determined to be a discharging requirement, and transfers the electric energy output by the vehicle-mounted bidirectional charger; and the echelon battery energy storage station is respectively connected with the charging and discharging equipment and the power grid so as to receive the electric energy transferred by the charging and discharging equipment and store or output the electric energy to the power grid. The system solves the problem of time difference existing between the electric energy supply and demand relations of the vehicle and the power grid, and improves the utilization rate of the power battery of the vehicle.
Description
Technical field
The present invention relates to automobile technical field, in particular to a kind of charge-discharge system and its control method based on vehicle.
Background technique
Currently, more and more vehicle enterprise mass in its vehicle platform carry bidirectional charger, bidirectional charger tool
The standby external discharging function of unidirectional 220V, but since the discharging function is mainly for user's field use demand, frequency of usage
Low, lness ratio of plant is high.
In the related technology, V2G (full name Vehicle to Grid, i.e. interaction between electric vehicle and power grid) is external
Discharge technology can electric car when not in use, the electric energy of on-vehicle battery is released to power grid, needs to charge in on-vehicle battery
When, electric current then flows to vehicle by power grid.It has the following problems: when on-vehicle battery needs externally electric discharge, power grid not necessarily demand
Electric power feedback, and then cause external discharging function that can not realize well in practical applications.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of charge-discharge system based on vehicle.System solves the problem
Existing time difference problem between vehicle and the electric energy relation between supply and demand of power grid, improves the power battery utilization rate of vehicle.
Second object of the present invention is to propose a kind of control method of charge-discharge system based on vehicle.
To achieve the goals above, the first aspect of the present invention embodiment discloses a kind of charge and discharge system based on vehicle
System, comprising: vehicle assembly, the vehicle assembly includes power battery and vehicle-mounted bidirectional charger, for needing externally electric discharge
When, request signal is generated, and when receiving electric discharge confirmation, it is external to the power battery by the vehicle-mounted bidirectional charger
Electric discharge；Charging/discharging apparatus, the charging/discharging apparatus are communicated with the vehicle assembly, receive the request letter that the vehicle assembly is sent
Number, and when being determined as electric discharge demand according to the request signal, Xiang Suoshu vehicle assembly feeds back the electric discharge and confirms, and transfer institute
State the electric energy of vehicle-mounted bidirectional charger output；Echelon battery energy storage station, echelon battery energy storage station respectively with the charge and discharge
Equipment is connected with power grid, to receive the electric energy of the charging/discharging apparatus transfer, and is stored or is exported to the power grid.
Charge-discharge system according to an embodiment of the present invention based on vehicle can pass through when vehicle needs externally electric discharge
The electric energy of charging/discharging apparatus transfer vehicle-mounted bidirectional charger output, echelon battery energy storage station receive the electricity of charging/discharging apparatus transfer
Can, and store or electric energy is exported to power grid according to the real-time requirement of power grid, solve the electric energy supply and demand of vehicle and power grid
Existing time difference problem between relationship, improves the power battery utilization rate of vehicle.
In some instances, it is communicated between the vehicle assembly and the charging/discharging apparatus by pulse signal.
In some instances, the request signal include working condition flag bit, power identification information flag bit, time about
Determine Information sign position and data check mark position, wherein the working condition flag bit indicates discharge condition, precharging state, just
Normal charged state；The power identification information flag bit indicates charge power；Time appointed information flag bit indicates timing；
The even-odd check of data check flag bit expression data.
In some instances, the vehicle assembly is also used to when needing to charge, and generates request signal, and fill receiving
When electricity confirmation, charged by the vehicle-mounted bidirectional charger to the power battery；The charging/discharging apparatus is also used to root
When being determined as charge requirement according to the request signal, Xiang Suoshu vehicle assembly feeds back the charging confirmation, and echelon described in transfer
The electric energy that the electric energy of battery energy storage station storage or echelon battery energy storage station are obtained from the power grid.
In some instances, the electricity or described that the charging/discharging apparatus is also used to externally discharge to the power battery
The electricity of power battery charging carries out charging.
In some instances, the charging/discharging apparatus includes charging pile.
The embodiment of the second aspect of the present invention discloses a kind of control method of charge-discharge system based on vehicle, including
Following steps: when needing externally electric discharge, vehicle assembly generates request signal, and when receiving electric discharge confirmation, by described
Vehicle-mounted bidirectional charger externally discharges to the power battery；Charging/discharging apparatus receives the request letter that the vehicle assembly is sent
Number, and when being determined as electric discharge demand according to the request signal, Xiang Suoshu vehicle assembly feeds back the electric discharge and confirms, and transfer institute
State vehicle-mounted bidirectional charger output electric energy, wherein echelon battery energy storage station respectively with the charging/discharging apparatus and power grid
It is connected, to receive the electric energy of the charging/discharging apparatus transfer, and is stored or exported to the power grid.
The control method of charge-discharge system according to an embodiment of the present invention based on vehicle can need externally to put in vehicle
When electric, the electric energy exported by charging/discharging apparatus transfer vehicle-mounted bidirectional charger, echelon battery energy storage station receives charging/discharging apparatus
The electric energy of transfer, and carry out storage or export electric energy to power grid according to the real-time requirement of power grid solves vehicle and power grid
Existing time difference problem between electric energy relation between supply and demand, improves the power battery utilization rate of vehicle.
In some instances, the request signal include working condition flag bit, power identification information flag bit, time about
Determine Information sign position and data check mark position, wherein the working condition flag bit indicates discharge condition, precharging state, just
Normal charged state；The power identification information flag bit indicates charge power；Time appointed information flag bit indicates timing；
The even-odd check of data check flag bit expression data.
In some instances, further includes: when needing to charge, the vehicle assembly generates request signal, and is receiving
When charging confirmation, charged by the vehicle-mounted bidirectional charger to the power battery；The charging/discharging apparatus is according to institute
When stating request signal and being determined as charge requirement, Xiang Suoshu vehicle assembly feeds back the charging and confirms, and echelon battery described in transfer
The electric energy that the electric energy of energy storage station storage or echelon battery energy storage station are obtained from the power grid.
In some instances, further includes: the power battery externally discharges or when the power battery charging, described to fill
The electricity for the electricity or the power battery charging that discharge equipment externally discharges to the power battery carries out charging.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein
Fig. 1 is the charge-discharge system structural block diagram according to an embodiment of the invention based on vehicle；
Fig. 2 is the pulse signal PWM that vehicle assembly and charging/discharging apparatus according to an embodiment of the invention are communicated
Relationship between duty ratio and maximum charging current；
Fig. 3 is the request signal digital communication waveform of the charge-discharge system according to an embodiment of the invention based on vehicle
Schematic diagram；
Fig. 4 is the control method flow chart of the charge-discharge system according to an embodiment of the invention based on vehicle.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
The charge-discharge system and its control method based on vehicle of embodiment according to the present invention are described below in conjunction with attached drawing.
Fig. 1 is the charge-discharge system structural block diagram according to an embodiment of the invention based on vehicle.
As shown in Figure 1, the charge-discharge system 100 based on vehicle includes vehicle assembly 110, charging/discharging apparatus 120 and echelon
Battery energy storage station 130.
Vehicle assembly 110 includes power battery 111 and vehicle-mounted bidirectional charger 112, is used for when needing externally electric discharge, raw
At request signal, and when receiving electric discharge confirmation, power battery 111 is externally put by vehicle-mounted bidirectional charger 112
Electricity；Charging/discharging apparatus 120 is communicated with vehicle assembly 110, for receiving the request signal of the transmission of vehicle assembly 110, and according to asking
When signal being asked to be determined as electric discharge demand, confirm to 110 feedback discharge of vehicle assembly, and transfer vehicle-mounted bidirectional charger 112 exports
Electric energy；Echelon battery energy storage station 130 is connected with charging/discharging apparatus 120 and power grid respectively, to receive 120 transfer of charging/discharging apparatus
Electric energy, and stored or exported to power grid.
It in specific example, is communicated, is led to by pulse signal between vehicle assembly 110 and charging/discharging apparatus 120
Often using CP (full name Control Pilot, i.e. control guiding) signal as between charging/discharging apparatus 120 and vehicle assembly 110
Charge and discharge identification control pin, wherein CP signal be frequency be 1KHz pwm signal, CP signal duty ratio setting it is two-way
The maximum charging current of charger 112, relationship between the duty ratio D and maximum charging current of CP signal as shown in Fig. 2, its
In, charging pile is charging/discharging apparatus 120.
Wherein, vehicle-mounted bidirectional charger 112 is usually unidirectional 7kW charger, and external discharge capability is 3kW~7kW.
Further, request signal includes working condition flag bit, power identification information flag bit, time appointed information mark
Will position and data check mark position, wherein working condition flag bit indicates discharge condition, precharging state, normal charging condition；Function
Rate identification information flag bit indicates charge power；Time appointed information flag bit indicates timing；Data check flag bit table
The even-odd check of registration evidence.
Specifically, in the digital communication data of request signal, 5% duty ratio indicates " 0 ", and 95% duty ratio indicates " 1 ", asks
Ask the digital communication data format of signal as follows: working condition flag bit (2)+power identification information flag bit (4)+time
Appointed information flag bit (4)+data check flag bit (1).In working condition flag bit, 00 indicates external discharge condition,
01 indicates precharging state, and 10 indicate normal charging condition, and 11 indicate reserved；Power identification information flag bit is assigned according to binary system
Value method indicates 0~7, the charge power of corresponding 0~7kW；Time appointed information flag bit is also according to binary system assignment method, table
Show 0~15, the timing of corresponding 15 hours of longest.As shown in figure 3, being the digital communication waveform diagram of request signal.
That is, need externally electric discharge when, vehicle assembly 110 send one section of 1kHZ duty ratio (duration≤
After 3s) giving charging/discharging apparatus 120, charging/discharging apparatus 120 to receive request signal, one section of 1kHZ, the PWM wave of certain duty ratio are replied
(waveform diagram and data format are identical as above-mentioned request signal), gives vehicle assembly 110, and vehicle assembly 110 receives charge and discharge and sets
After the standby 120 electric discharge confirmations replied, electric energy is exported by vehicle-mounted bidirectional charger 112, is externally discharged.
In specific example, vehicle assembly 110 is also used to when needing to charge, and generates request signal, and receiving
When charging confirmation, charged by vehicle-mounted bidirectional charger 112 to power battery 111；Charging/discharging apparatus 120 is also used to basis
When request signal is determined as charge requirement, charging confirmation is fed back to vehicle assembly 110, and transfer echelon battery energy storage station 130 is deposited
The electric energy that the electric energy of storage or echelon battery energy storage station 130 are obtained from power grid, compared to the prior art, the isolation of the system
Formula design improves security performance of the system in charge and discharge process.
Further, charging/discharging apparatus 120 is also used to the electricity or power battery externally to discharge power battery 111
The electricity of 111 chargings carries out charging.Thus, it is possible to the interests win-win of supply and marketing both sides is realized with certain economic compensation to user,
Further push the fast development of electric car.
It should be noted that the charging/discharging apparatus 120 in the embodiment of the present invention includes charging pile.
Charge-discharge system according to an embodiment of the present invention based on vehicle can pass through when vehicle needs externally electric discharge
The electric energy of charging/discharging apparatus transfer vehicle-mounted bidirectional charger output, echelon battery energy storage station receive the electricity of charging/discharging apparatus transfer
Can, and store or electric energy is exported to power grid according to the real-time requirement of power grid, solve the electric energy supply and demand of vehicle and power grid
Existing time difference problem between relationship, improves the power battery utilization rate of vehicle.
Fig. 4 is the control method flow chart of the charge-discharge system according to an embodiment of the invention based on vehicle.
As shown in figure 4, the control method of the charge-discharge system based on vehicle of the embodiment of the present invention the following steps are included:
S101: when needing externally electric discharge, vehicle assembly generates request signal, and when receiving electric discharge confirmation, passes through
Vehicle-mounted bidirectional charger externally discharges to power battery；
S102: charging/discharging apparatus receives the request signal that vehicle assembly is sent, and is determined as the need that discharge according to request signal
When asking, confirm to vehicle assembly feedback discharge, and the electric energy of transfer vehicle-mounted bidirectional charger output.
Wherein, echelon battery energy storage station is connected with charging/discharging apparatus and power grid respectively, to receive charging/discharging apparatus transfer
Electric energy, and stored or exported to power grid.
In one embodiment of the invention, request signal include working condition flag bit, power identification information flag bit,
Time appointed information flag bit and data check mark position, wherein working condition flag bit indicate discharge condition, precharging state,
Normal charging condition；Power identification information flag bit indicates charge power；Time appointed information flag bit indicates timing；Number
The even-odd check of data is indicated according to check mark position.
In one embodiment of the invention, further includes: when needing to charge, vehicle assembly generation request signal, and
When receiving charging confirmation, charged by vehicle-mounted bidirectional charger to power battery；Charging/discharging apparatus is according to request signal
When being determined as charge requirement, charging confirmation, and the electric energy of transfer echelon battery energy storage station storage, Huo Zheti are fed back to vehicle assembly
The electric energy that primary cell energy storage station is obtained from power grid.
In one embodiment of the invention, further includes: power battery externally discharges or when power battery charging, charge and discharge
The electricity for the electricity or power battery charging that electric equipment externally discharges to power battery carries out charging.
The control method of charge-discharge system according to an embodiment of the present invention based on vehicle can need externally to put in vehicle
When electric, the electric energy exported by charging/discharging apparatus transfer vehicle-mounted bidirectional charger, echelon battery energy storage station receives charging/discharging apparatus
The electric energy of transfer, and carry out storage or export electric energy to power grid according to the real-time requirement of power grid solves vehicle and power grid
Existing time difference problem between electric energy relation between supply and demand, improves the power battery utilization rate of vehicle.
It should be noted that the specific implementation side of the control method of the charge-discharge system based on vehicle of the embodiment of the present invention
Formula is similar with the specific implementation of the charge-discharge system based on vehicle of the embodiment of the present invention, specifically refers to components of system as directed
Description, is not repeated herein.
In addition, other compositions of vehicle according to an embodiment of the present invention and effect are for those of ordinary skill in the art
For be all it is known, in order to reduce redundancy, be not repeated herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of charge-discharge system based on vehicle characterized by comprising
Vehicle assembly, the vehicle assembly include power battery and vehicle-mounted bidirectional charger, are used for when needing externally electric discharge, raw
At request signal, and when receiving electric discharge confirmation, externally discharged by the vehicle-mounted bidirectional charger the power battery；
Charging/discharging apparatus, the charging/discharging apparatus are communicated with the vehicle assembly, receive the request letter that the vehicle assembly is sent
Number, and when being determined as electric discharge demand according to the request signal, Xiang Suoshu vehicle assembly feeds back the electric discharge and confirms, and transfer institute
State the electric energy of vehicle-mounted bidirectional charger output；
Echelon battery energy storage station, echelon battery energy storage station is connected with the charging/discharging apparatus and power grid respectively, to receive
The electric energy of charging/discharging apparatus transfer is stated, and is stored or is exported to the power grid.
2. the charge-discharge system according to claim 1 based on vehicle, which is characterized in that the vehicle assembly and described fill
It is communicated between discharge equipment by pulse signal.
3. the charge-discharge system according to claim 1 or 2 based on vehicle, which is characterized in that the request signal includes
Working condition flag bit, power identification information flag bit, time appointed information flag bit and data check mark position, wherein
The working condition flag bit indicates discharge condition, precharging state, normal charging condition；
The power identification information flag bit indicates charge power；
Time appointed information flag bit indicates timing；
The even-odd check of data check flag bit expression data.
4. the charge-discharge system according to claim 1 based on vehicle, which is characterized in that
The vehicle assembly is also used to when needing to charge, and request signal is generated, and when receiving charging confirmation, by described
Vehicle-mounted bidirectional charger charges to the power battery；
When the charging/discharging apparatus is also used to be determined as charge requirement according to the request signal, Xiang Suoshu vehicle assembly feeds back institute
Charging confirmation is stated, and the electric energy of the storage of echelon battery energy storage station described in transfer or echelon battery energy storage station are from the electricity
The electric energy obtained in net.
5. the charge-discharge system according to claim 1 based on vehicle, which is characterized in that the charging/discharging apparatus is also used to
The electricity of the electricity or the power battery charging that externally discharge the power battery carries out charging.
6. the charge-discharge system according to claim 1 based on vehicle, which is characterized in that the charging/discharging apparatus includes filling
Electric stake.
7. a kind of control method of the charge-discharge system based on vehicle, which comprises the following steps:
When needing externally electric discharge, vehicle assembly generates request signal, and when receiving electric discharge confirmation, by described vehicle-mounted double
It externally discharges to charger the power battery；
Charging/discharging apparatus receives the request signal that the vehicle assembly is sent, and is determined as electric discharge demand according to the request signal
When, Xiang Suoshu vehicle assembly feeds back the electric discharge confirmation, and the electric energy of the output of vehicle-mounted bidirectional charger described in transfer, wherein institute
It states echelon battery energy storage station to be connected with the charging/discharging apparatus and power grid respectively, to receive the electricity of the charging/discharging apparatus transfer
Can, and stored or exported to the power grid.
8. the method according to the description of claim 7 is characterized in that the request signal includes working condition flag bit, power
Identification information flag bit, time appointed information flag bit and data check mark position, wherein
The working condition flag bit indicates discharge condition, precharging state, normal charging condition；
The power identification information flag bit indicates charge power；
Time appointed information flag bit indicates timing；
The even-odd check of data check flag bit expression data.
9. the method according to the description of claim 7 is characterized in that further include:
When needing to charge, the vehicle assembly generates request signal, and when receiving charging confirmation, by described vehicle-mounted double
It charges to charger to the power battery；
When the charging/discharging apparatus is determined as charge requirement according to the request signal, Xiang Suoshu vehicle assembly feeds back the charging
Confirmation, and the electric energy of the storage of echelon battery energy storage station described in transfer or echelon battery energy storage station are obtained from the power grid
The electric energy taken.
10. the method according to the description of claim 7 is characterized in that further include:
The power battery externally discharges or when the power battery charging, and the charging/discharging apparatus is to the power battery pair
The electricity of the electricity of outer electric discharge or the power battery charging carries out charging.
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Cited By (6)
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| CN112693356A (en) * | 2020-12-25 | 2021-04-23 | 车主邦（北京）科技有限公司 | Charging and discharging control method, charging and discharging pile, vehicle, system, medium and equipment |
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