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CN113765163B - Control method, device and system for whole-package echelon battery energy storage and charging system - Google Patents

Control method, device and system for whole-package echelon battery energy storage and charging system Download PDF

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Publication number
CN113765163B
CN113765163B CN202010484502.1A CN202010484502A CN113765163B CN 113765163 B CN113765163 B CN 113765163B CN 202010484502 A CN202010484502 A CN 202010484502A CN 113765163 B CN113765163 B CN 113765163B
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China
Prior art keywords
charging
direct current
vehicle
mode
energy storage
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Application number
CN202010484502.1A
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Chinese (zh)
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CN113765163A (en
Inventor
李春涛
张生琳
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Blue Valley Smart Beijing Energy Technology Co Ltd
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Blue Valley Smart Beijing Energy Technology Co Ltd
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Publication of CN113765163A publication Critical patent/CN113765163A/en
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Classifications

    • 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
    • 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
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/53—Batteries
    • 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
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a control method, a device and a system of an integral-package echelon battery energy storage and charging system, wherein the control method comprises the following steps: when the quick charging gun is detected to be pulled out of the charging gun base, determining a vehicle charging mode according to the peak-valley period of the electricity price and the stored electric quantity of the whole package echelon battery energy storage charging system; after the quick charging gun is connected with the vehicle, obtaining charging demand power according to charging request information of the vehicle; and determining at least one target direct current chopper according to the charging demand power, wherein one end of the target direct current chopper is controlled to be connected with a quick charging gun through a quick charging direct current bus according to the vehicle charging mode, and the other end of the target direct current chopper is connected with a target battery pack or a power grid. According to the whole-package echelon battery energy storage charging system, the function of the charging pile is increased, the vehicle can be charged only by changing the structure connected with the two ends of the target direct current chopper when the vehicle is charged, and in an energy storage charging mode, the charging efficiency is improved, and the charging cost is reduced.

Description

Control method, device and system for whole-package echelon battery energy storage and charging system
Technical Field
The invention relates to the technical field of energy storage of whole-package echelon batteries, in particular to a control method, a device and a system of an energy storage and charging system of a whole-package echelon battery.
Background
With the continuous development of electric vehicles, the number of retired waste power battery packs is increased, so that the waste power battery packs are effectively utilized, the whole-pack echelon battery energy storage technology is developed, but at the current stage, the whole-pack echelon battery energy storage technology is only used for energy storage and feeding to a power grid, and how to develop the whole-pack echelon battery energy storage technology is to increase the function of a charging pile on the basis of the original function of the whole-pack echelon battery energy storage technology, so that the efficient utilization of electric energy is a great difficulty to be solved by a person skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide a control method, a device and a system for an integral-package echelon battery energy storage charging system, which are used for solving the problem that the current integral-package echelon battery energy storage technology is only used for energy storage and feeding to a power grid, and cannot realize efficient utilization of electric energy after a charging pile function is added.
In order to solve the above technical problems, an embodiment of the present invention provides a control method for an integral-package echelon battery energy storage charging system, which is applied to a control device, and includes:
When the quick charging gun is detected to be pulled out of the charging gun base, a first electricity peak-valley period corresponding to the first current time and a first stored electric quantity of the whole package of echelon battery energy storage charging system are obtained, and a vehicle charging mode of the whole package of echelon battery energy storage charging system for charging the vehicle is determined according to the first electricity peak-valley period and the first stored electric quantity;
When the connection state of the quick charging gun and the vehicle is detected to be the connection completion state, receiving charging request information sent by the vehicle, and obtaining charging demand power of the vehicle according to the charging request information;
determining at least one target direct current chopper from a plurality of direct current choppers according to the charging demand power and the vehicle charging mode, wherein the total output power of the target direct current chopper is equal to the charging demand power;
When the vehicle charging mode is an energy storage charging mode, a first end of the control target direct current chopper is connected with the quick charging gun through a first quick charging direct current bus, and a second end of the control target direct current chopper is connected with a target battery pack corresponding to the target direct current chopper; or when the vehicle charging mode is a mode of charging the power grid to the vehicle, the second end of the control target direct current chopper is connected with the quick charging gun through the second quick charging direct current bus, and the first end of the control target direct current chopper is connected with the power grid through the bidirectional alternating current-direct current converter and the energy storage direct current bus.
Preferably, according to the control method as described above, the step of determining the vehicle charging mode of the whole pack echelon battery energy storage charging system for charging the vehicle according to the first electricity price peak-valley period and the first stored electricity quantity includes:
When the first electricity price peak-valley period is a valley period, determining that the vehicle charging mode is a power grid-to-vehicle charging mode;
When the first electricity price peak-valley period is a non-valley period, if the first stored electricity quantity is larger than a preset electricity quantity threshold value, determining that the vehicle charging mode is an energy storage charging mode; otherwise, determining the charging mode as a mode of charging the vehicle by the power grid.
Specifically, according to the control method, a first end of the control target direct current chopper is connected with the fast charging gun through a first fast charging direct current bus, and a second end of the control target direct current chopper is connected with the target battery pack, and the control method comprises the following steps:
And controlling a first control switch arranged between the first end of the target direct current chopper and the energy storage direct current bus and the first quick charging direct current bus, switching to a state that the target direct current chopper is connected with the first quick charging direct current bus, and controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second quick charging direct current bus, switching to a state that the target direct current chopper is connected with the target battery pack.
Specifically, according to the control method, the second end of the control target direct current chopper is connected with the quick charging gun through the second quick charging direct current bus, and the first end is connected with the power grid through the energy storage direct current bus and the bidirectional alternating current-direct current converter, and the control method comprises the following steps:
and controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the second fast-charging direct current bus, and controlling a first control switch between the first end of the target direct current chopper and the energy storage direct current bus and between the first fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the bidirectional alternating current-direct current converter.
Preferably, the control method as described above, after the step of determining the vehicle charging mode in which the entire pack of the echelon battery energy storage charging system charges the vehicle according to the first electricity price peak-to-valley period and the first stored electricity amount, further includes:
when the charging mode is an energy storage charging mode for the vehicle, a third control switch arranged among the first fast charging direct current bus, the second fast charging direct current bus and the fast charging gun is controlled to be switched to a state that the first fast charging direct current bus is connected with the fast charging gun;
Or when the charging mode is a mode of charging the power grid to the vehicle, the third control switch is controlled to switch to a state that the second quick charging direct current bus is connected with the quick charging gun.
Specifically, the control method as described above further includes: and in the charging process of the vehicle, when the switching of the peak-to-valley period of electricity price is detected, the current vehicle charging mode is maintained.
Preferably, the control method as described above further includes:
when receiving the charging ending information sent by the vehicle, switching from the current vehicle charging mode to a previous standby working mode, wherein the standby working mode is a working mode when the quick charging gun is positioned in the charging gun stand.
Further, the control method as described above further includes: and when receiving the charging ending information sent by the vehicle, controlling the third control switch to be switched to the unconnected state.
Preferably, the control method as described above further includes:
When the quick charging gun is detected to be positioned in the charging gun stand, a second electricity peak-valley period corresponding to a second current time and a second stored electric quantity of the whole package of echelon battery energy storage charging system are obtained, and a standby working mode of the whole package of echelon battery energy storage charging system is determined according to the second electricity peak-valley period and the second stored electric quantity;
When the standby working mode is a mode that the power grid charges the battery pack, the power grid is connected with the corresponding battery pack through the bidirectional AC-DC converter, the energy storage DC bus and the DC chopper;
when the standby working mode is a mode of preparing the power grid to charge the vehicle, the power grid is connected with a second quick-charging direct-current bus through a bidirectional alternating-current/direct-current converter, an energy storage direct-current bus and a direct-current chopper;
when the standby working mode is a mode that the battery pack charges the power grid, the battery pack is connected with the power grid through the direct current chopper, the energy storage direct current bus and the bidirectional alternating current-direct current converter;
When the standby working mode is a mode for preparing the battery pack to charge the vehicle, the battery pack is connected with the first fast-charging direct-current bus through the direct-current chopper.
Specifically, according to the control method described above, the step of determining the standby operation mode of the whole pack of cascade battery energy storage charging system according to the second electricity valence peak-valley period and the second stored electricity quantity includes:
When the second electricity price peak-valley period is a valley period and the second stored electric quantity is smaller than the full electric quantity, determining that the standby working mode is a power grid-to-battery pack charging mode;
When the second electricity price peak-valley period is a valley period and the second stored electric quantity is equal to the full electric quantity, determining that the standby working mode is a power grid charging preparation mode for the vehicle;
when the second electricity price peak-valley period is a non-valley period and the second stored electricity quantity is smaller than a preset electricity quantity threshold value, determining that the standby working mode is a power grid charging preparation mode for the vehicle;
When the second electricity valence peak-valley period is a pre-peak period in the non-valley period and the second stored electric quantity is larger than a preset electric quantity threshold value, determining that the standby working mode is a battery pack charging preparation mode for the vehicle, wherein the pre-peak period is a period in which the second current time is located in the peak period or the normal period and the time span from a switching time point of switching to the valley period is larger than the preset time;
And when the second electricity valence peak-valley period is a peak-to-valley period in the non-valley period and the second stored electric quantity is larger than a preset electric quantity threshold value, determining that the standby working mode is a battery pack to power grid charging mode, wherein the peak-to-valley period is a period in which the second current time is located in the peak period or the normal period and the time span from the switching time point is smaller than or equal to the preset time.
Another preferred embodiment of the present invention also provides a control apparatus including:
The first processing module is used for acquiring a first electricity peak-valley period corresponding to the first current time and a first stored electric quantity of the whole package echelon battery energy storage charging system when the quick charging gun is pulled out of the charging gun base, and determining a vehicle charging mode of the whole package echelon battery energy storage charging system for charging the vehicle according to the first electricity peak-valley period and the first stored electric quantity;
the second processing module is used for receiving charging request information sent by the vehicle when the connection state of the quick charging gun and the vehicle is detected to be a connection completion state, and obtaining charging demand power of the vehicle according to the charging request information;
The third processing module is used for determining at least one target direct current chopper from a plurality of direct current choppers according to the charging demand power and the vehicle charging mode, wherein the total output power of the target direct current chopper is equal to the charging demand power;
The fourth processing module is used for controlling the first end of the target direct current chopper to be connected with the quick charging gun through the first quick charging direct current bus when the vehicle charging mode is the energy storage charging mode, and the second end of the target direct current chopper is connected with the target battery pack corresponding to the target direct current chopper; or when the vehicle charging mode is a mode of charging the power grid to the vehicle, the second end of the control target direct current chopper is connected with the quick charging gun through the second quick charging direct current bus, and the first end of the control target direct current chopper is connected with the power grid through the bidirectional alternating current-direct current converter and the energy storage direct current bus.
Preferably, the control device as described above, the first processing module includes:
the first processing unit is used for determining that the vehicle charging mode is a power grid-to-vehicle charging mode when the first electricity peak-to-valley period is a valley period;
the second processing unit is used for determining that the vehicle charging mode is a mode of charging energy storage to the vehicle if the first stored electric quantity is larger than a preset electric quantity threshold value when the first electric valence peak-valley period is a non-valley period; otherwise, determining the charging mode as a mode of charging the vehicle by the power grid.
Specifically, according to the control method as described above, the fourth processing module includes:
And the third processing unit is used for controlling a first control switch arranged between the first end of the target direct current chopper and the energy storage direct current bus and the first fast charging direct current bus, switching to a state that the target direct current chopper is connected with the first fast charging direct current bus, and controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast charging direct current bus, and switching to a state that the target direct current chopper is connected with the target battery pack.
Specifically, according to the control method as described above, the fourth processing module further includes:
The fourth processing unit is used for controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the second fast-charging direct current bus, controlling a first control switch between the first end of the target direct current chopper and the energy storage direct current bus and between the first fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the bidirectional alternating current-direct current converter.
Preferably, the control device as described above, the control device further includes:
The fifth processing module is used for controlling a third control switch arranged among the first fast charging direct current bus, the second fast charging direct current bus and the fast charging gun to be switched to a state that the first fast charging direct current bus is connected with the fast charging gun when the charging mode is an energy storage charging mode;
or the sixth processing module is used for controlling the third control switch to a state that the second quick charging direct current bus is connected with the quick charging gun when the charging mode is a mode that the power grid charges the vehicle.
Specifically, the control device as described above further includes:
and the seventh processing module is used for keeping the current vehicle charging mode when the switching of the electricity price peak-valley period is detected in the charging process of the vehicle.
Preferably, the control device as described above further includes:
and the eighth processing module is used for switching from the current vehicle charging mode to a previous standby operating mode when receiving the charging ending information sent by the vehicle, wherein the standby operating mode is an operating mode when the quick charging gun is positioned in the charging gun stand.
Further, the control device as described above further includes:
And the ninth processing module is used for controlling the third control switch to be switched to the unconnected state when receiving the charging ending information sent by the vehicle.
Preferably, the control device as described above further includes:
the tenth processing module is used for acquiring a second electricity peak-valley period corresponding to the second current time and second stored electricity quantity of the whole package echelon battery energy storage charging system when the quick charging gun is detected to be positioned in the charging gun base, and determining a standby working mode of the whole package echelon battery energy storage charging system according to the second electricity peak-valley period and the second stored electricity quantity;
The eleventh processing module is used for connecting the power grid with the corresponding battery pack through the bidirectional AC-DC converter, the energy storage DC bus and the DC chopper when the standby working mode is a mode of charging the power grid to the battery pack;
the twelfth processing module is used for connecting the power grid with the second quick-charging direct-current bus through the bidirectional alternating-current/direct-current converter, the energy storage direct-current bus and the direct-current chopper when the standby working mode is a power grid-to-vehicle charging preparation mode;
the thirteenth processing module is used for connecting the battery pack with the power grid through the direct current chopper, the energy storage direct current bus and the bidirectional alternating current-direct current converter when the standby working mode is a mode of charging the battery pack to the power grid;
And the fourteenth processing module is used for connecting the battery pack with the first fast-charging direct-current bus through the direct-current chopper when the standby working mode is a mode of preparing the battery pack for charging the vehicle.
Specifically, the control device as described above, the tenth processing module includes:
the fifth processing unit is used for determining that the standby working mode is a power grid-to-battery pack charging mode when the second electricity price peak-to-valley period is a valley period and the second stored electric quantity is smaller than the full electric quantity;
the sixth processing unit is used for determining that the standby working mode is a power grid charging preparation mode for the vehicle when the second electricity peak-valley period is a valley period and the second stored electric quantity is equal to the full electric quantity;
The seventh processing unit is used for determining that the standby working mode is a power grid-to-vehicle charging preparation mode when the second electricity peak-to-valley period is a non-valley period and the second stored electricity quantity is smaller than a preset electricity quantity threshold value;
An eighth processing unit, configured to determine, when the second electricity peak-valley period is a pre-peak period in the non-valley period and the second stored electricity quantity is greater than a preset electricity quantity threshold, that the standby operation mode is a battery pack charging preparation mode for the vehicle, where the pre-peak period is a period in which the second current time is located in the peak period or the normal period and a time span from a switching time point of switching to the valley period is greater than a preset time;
And the ninth processing unit is used for determining that the standby working mode is a mode of charging the battery pack to the power grid when the second electricity peak-valley period is a post-peak period in the non-valley period and the second stored electricity quantity is larger than a preset electricity quantity threshold value, wherein the post-peak period is a period in which the second current time is located in the peak period or the normal period and the time span from the switching time point is smaller than or equal to the preset time.
Still another preferred embodiment of the present invention provides an entire pack echelon battery energy storage charging system comprising:
The device comprises a bidirectional AC/DC converter, a DC chopper, a battery pack, a first control switch, a second control switch, a quick charging gun, a first quick charging DC bus, a second quick charging DC bus, an energy storage DC bus and the control device;
One end of the bidirectional AC/DC converter is connected with the power grid, and the other end of the bidirectional AC/DC converter is connected with first connecting points of the first control switches through the energy storage DC bus;
The second connecting contact of each first control switch is connected with the quick charging gun through a first quick charging direct current bus, and the first common contact of each first control switch is connected with the first end of one direct current chopper;
the second end of each direct current chopper is connected with a second common contact of a second control switch;
the third connecting contact of each second control switch is connected with a battery pack, and the fourth connecting contact of each second control switch is connected with the quick charging gun through a second quick charging direct current bus;
the control device is respectively in communication connection with the bidirectional AC-DC converter, the DC chopper, the battery pack, the first control switch, the second control switch and the quick charging gun, and can realize the control method of the whole pack echelon battery energy storage charging system when in use.
Preferably, the whole package echelon battery energy storage charging system as described above further comprises:
And the third common contact of the third control switch is connected with the quick charging gun, the fifth connecting contact is connected with the first quick charging direct current bus, and the sixth connecting contact is connected with the second quick charging direct current bus.
Compared with the prior art, the control method, the device and the system for the whole-package echelon battery energy storage and charging system have the following advantages:
According to the technical scheme, the charging pile function is added for the whole-package echelon battery energy storage charging system, the quick charging direct current buses are respectively arranged at the two ends of the direct current chopper, when the charging pile function of the whole-package echelon battery energy storage charging system is needed to be used, the vehicle charging mode is determined according to the electricity peak-valley time period and the storage electric quantity of the whole-package echelon battery energy storage charging system, and the target direct current chopper and/or the target battery pack meeting the charging requirement are determined according to the charging requirement of the vehicle, so that when the vehicle is charged according to the vehicle charging mode, the charging of the vehicle can be realized under the condition that the other battery packs are not influenced, and in addition, the low-price electricity in the target battery pack can be charged into the vehicle only through the target direct current chopper under the energy storage-to-vehicle charging mode, thereby being beneficial to improving the charging efficiency and reducing the charging cost.
Drawings
FIG. 1 is a schematic flow chart of a control method of an entire package echelon battery energy storage and charging system according to the present invention;
FIG. 2 is a second flow chart of a control method of the whole-package echelon battery energy storage and charging system of the present invention;
FIG. 3 is a schematic diagram of a control device of the whole-package echelon battery energy storage and charging system of the invention;
FIG. 4 is a schematic diagram of a circuit configuration of the whole package echelon battery energy storage charging system of the present invention in an energy storage to vehicle charging mode;
FIG. 5 is a second schematic diagram of the circuit configuration of the whole package echelon battery energy storage charging system of the present invention in an energy storage to vehicle charging mode;
Fig. 6 is a schematic circuit diagram of the whole-package echelon battery energy storage charging system in a mode of charging a battery package to a power grid;
Fig. 7 is a schematic circuit diagram of the whole-package echelon battery energy storage charging system in a mode of charging from a power grid to a battery package;
FIG. 8 is a schematic diagram of a circuit configuration of the whole package echelon battery energy storage charging system of the present invention in a grid-to-vehicle charging mode;
Fig. 9 is a second schematic circuit diagram of the whole-package echelon battery energy storage charging system in the charging mode of the power grid to the vehicle.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.
Referring to fig. 1, a preferred embodiment of the present invention provides a control method of an entire-package echelon battery energy storage and charging system, which is applied to a control device and includes:
step S101, when the quick charging gun is detected to be pulled out of a charging gun base, a first electricity peak-valley period corresponding to the first current time and a first stored electric quantity of the whole package echelon battery energy storage charging system are obtained, and a vehicle charging mode of the whole package echelon battery energy storage charging system for charging a vehicle is determined according to the first electricity peak-valley period and the first stored electric quantity;
step S102, when the connection state of the quick charge gun and the vehicle is detected to be a connection completion state, receiving charging request information sent by the vehicle, and obtaining charging demand power of the vehicle according to the charging request information;
step S103, determining at least one target direct current chopper from a plurality of direct current choppers according to the charging demand power and the vehicle charging mode, wherein the total output power of the target direct current chopper is equal to the charging demand power;
Step S104, when the vehicle charging mode is the energy storage charging mode, a first end of the control target direct current chopper is connected with the quick charging gun through a first quick charging direct current bus, and a second end of the control target direct current chopper is connected with a target battery pack corresponding to the target direct current chopper; or when the vehicle charging mode is a mode of charging the power grid to the vehicle, the second end of the control target direct current chopper is connected with the quick charging gun through the second quick charging direct current bus, and the first end of the control target direct current chopper is connected with the power grid through the bidirectional alternating current-direct current converter and the energy storage direct current bus.
In a preferred embodiment of the present invention, the charging pile added to the whole pack of the echelon battery energy storage charging system is exemplified as a direct current charging pile, and after the charging pile function is added, the control device detects the connection state of the fast charging gun and the charging gun stand on the whole pack of the echelon battery energy storage charging system, and when the fast charging gun is detected to be pulled out from the charging gun stand, it is determined that the whole pack of the echelon battery energy storage charging system needs to charge external devices including new energy vehicles. Taking an external device as a new energy vehicle as an example in the embodiment, at this time, a corresponding first electric valence peak-valley period of a first current time and a first energy storage energy of the whole package echelon battery energy storage charging system under the first current time are obtained; according to the first electricity price peak-valley period and the first energy storage capacity, the vehicle charging mode of the whole package echelon battery energy storage charging system for charging the vehicle in the first current time can be determined under preset judgment logic, so that the optimal vehicle charging mode is conveniently selected to charge the vehicle on the premise of ensuring charging, and the charging cost is saved; and when the quick charging gun is completely connected with the vehicle, charging request information sent by the vehicle is received, and the charging demand power of the vehicle can be obtained according to the request voltage and/or the request current and other parameters in the charging request information, so as to know the charging demand of the vehicle. According to the charging demand power of the vehicle and the output power of each direct current chopper, the total output power of at least one direct current chopper is equal to or greater than the charging demand power, and the target direct current chopper during charging can be determined to ensure that the vehicle is charged smoothly. Preferably, the method further judges the electric quantity of the target battery pack corresponding to each target direct current chopper, and if the vehicle charging mode is the energy storage charging mode, the sum of the electric quantity of each target battery pack is at least larger than a preset electric quantity.
When the determined vehicle charging mode is an energy storage charging mode, namely, when the battery pack charges the vehicle, the target battery pack corresponding to the target direct current chopper is required to be connected with the quick charging gun, particularly, see fig. 4 or 5, the first end of the target direct current chopper is connected with the quick charging gun through the first quick charging direct current bus, the second end of the target direct current chopper is connected with the corresponding target battery pack, the first end of the target direct current chopper is an output end, the second end is an input end, electric energy in the target battery pack is directly converted into direct current and then is charged for the vehicle, the charging efficiency is improved, the influence on other battery packs is avoided, meanwhile, the electric energy in the target battery pack is charged in a valley period with lower electricity price, and therefore the energy storage charging mode is adopted, and the charging cost is reduced.
When the vehicle charging mode is determined to be a mode of charging the power grid to the vehicle, that is, when the power grid is directly charged, the power grid needs to be connected with a quick charging gun at this time, specifically, referring to fig. 8 or 9, a first end of the target direct current chopper is connected with the power grid through an energy storage direct current bus and a bidirectional alternating current-direct current converter, a second end of the target direct current chopper is connected with the quick charging gun through a second quick charging direct current bus, at this time, the first end of the target direct current chopper is an input end, the second end is an output end, alternating current-to-direct current and direct current-to-direct current processing is performed on alternating current from the power grid through the bidirectional alternating current-direct current-current converter and the target direct current chopper, and then the vehicle is charged, and in this process, the connection state of other direct current choppers is not changed, that is, and no influence is caused on other battery packs.
In summary, the technical scheme provided by the invention adds the function of the charging pile for the whole-package echelon battery energy storage charging system, and sets a quick charging direct current bus at each of two ends of the direct current chopper, when the function of the charging pile of the whole-package echelon battery energy storage charging system is required to be used, the vehicle charging mode is determined according to the peak-valley period of electricity and the stored electricity quantity of the whole-package echelon battery energy storage charging system, and the target direct current chopper and/or the target battery pack meeting the charging requirement is determined according to the charging requirement of the vehicle, so that when the vehicle is charged according to the charging mode of the vehicle, the charging of the vehicle can be realized under the condition that other battery packs are not influenced, and in the charging mode of the energy storage to the vehicle, the low-price electricity in the target battery pack can be charged into the vehicle only through the target direct current chopper, thereby being beneficial to improving the charging efficiency and reducing the charging cost.
It should be noted that, the energy storage dc bus is a power supply line bundle of other electric devices in the whole package echelon battery energy storage charging system, so when the energy storage is adopted to charge the vehicle, a non-target dc chopper needs to be controlled to connect the energy storage dc bus with the corresponding battery package.
Preferably, according to the control method as described above, the step of determining the vehicle charging mode of the whole pack echelon battery energy storage charging system for charging the vehicle according to the first electricity price peak-valley period and the first stored electricity quantity includes:
When the first electricity price peak-valley period is a valley period, determining that the vehicle charging mode is a power grid-to-vehicle charging mode;
When the first electricity price peak-valley period is a non-valley period, if the first stored electricity quantity is larger than a preset electricity quantity threshold value, determining that the vehicle charging mode is an energy storage charging mode; otherwise, determining the charging mode as a mode of charging the vehicle by the power grid.
In a specific embodiment of the present invention, since the peak-to-valley period of the electricity price is a specific period of time, when determining the peak-to-valley period of the electricity price, the time point of the current time may be compared with a pre-stored peak-to-valley period comparison table to determine the first peak-to-valley period of the electricity price corresponding to the first current time. When the first electricity price peak-valley period is the valley period, the electricity price is lower, and the charging mode of the power grid to the vehicle is adopted, so that low-cost charging can be ensured, and the charging process of the power grid to the battery pack and the recharging process of the battery pack to the vehicle can be simplified. When the first electricity price peak-valley period is a non-valley period, namely a peak period or a flat period, the charging cost is higher because the electricity price is higher and the electric network is directly adopted for charging, the first stored electric quantity is judged again at the moment, if the first stored electric quantity is larger than a preset electric quantity threshold value, the whole package echelon battery energy storage charging system can be described as meeting the charging requirement of the vehicle, the vehicle charging mode is determined as an energy storage charging mode at the moment, low-price electricity stored in the battery package can be utilized for charging the vehicle, and the charging cost is saved on the premise of ensuring the charging of the vehicle; if the first stored electric quantity is smaller than or equal to the preset electric quantity threshold value, the fact that the current whole-package echelon battery energy storage charging system cannot meet or can just meet the charging requirement of the vehicle can be explained, and at the moment, in order to avoid the situation that the vehicle cannot be normally charged due to insufficient electric quantity in the vehicle charging process, the vehicle charging mode is determined to be a power grid to vehicle charging mode, and normal charging of the vehicle is guaranteed.
Alternatively, the preset electric quantity threshold may be set by a technician according to actual situations, and in the present invention, it is preferable that the preset electric quantity threshold is at least one full electric quantity of the new energy vehicle as a standard.
Specifically, according to the control method, a first end of the control target direct current chopper is connected with the fast charging gun through a first fast charging direct current bus, and a second end of the control target direct current chopper is connected with the target battery pack, and the control method comprises the following steps:
And controlling a first control switch arranged between the first end of the target direct current chopper and the energy storage direct current bus and the first quick charging direct current bus, switching to a state that the target direct current chopper is connected with the first quick charging direct current bus, and controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second quick charging direct current bus, switching to a state that the target direct current chopper is connected with the target battery pack.
Specifically, according to the control method, the second end of the control target direct current chopper is connected with the quick charging gun through the second quick charging direct current bus, and the first end is connected with the power grid through the energy storage direct current bus and the bidirectional alternating current-direct current converter, and the control method comprises the following steps:
and controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the second fast-charging direct current bus, and controlling a first control switch between the first end of the target direct current chopper and the energy storage direct current bus and between the first fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the bidirectional alternating current-direct current converter.
In a preferred embodiment of the present invention, a first control switch is disposed between a first end of the dc chopper and the energy storage dc bus and the first fast-charging dc bus, a second control switch is disposed between a second end of the dc chopper and the battery pack and the second fast-charging dc bus, the connection relationship between the dc chopper and the bidirectional ac-dc converter and the first fast-charging dc bus can be switched by controlling the first control switch, and the connection relationship between the second end of the dc chopper and the target battery pack and the second fast-charging dc bus can be switched by controlling the second control switch. Specifically, when the vehicle charging mode is an energy storage charging mode, the first control switch is controlled to be switched to the first end of the target direct current chopper to be connected with the first fast charging direct current bus, the second control switch is controlled to be switched to the second end of the target direct current chopper to be connected with the corresponding target battery pack, and therefore the target battery pack can supply power to the fast charging gun through the target direct current chopper, and the vehicle is charged. When the vehicle charging mode is a mode that the power grid charges the vehicle, the first control switch is controlled to be switched to the first end of the target direct current chopper to be connected with the energy storage direct current bus, the second control switch is controlled to be switched to the second end of the target direct current chopper to be connected with the second quick charging direct current bus, and therefore electric energy of the power grid can be supplied to the quick charging gun through the energy storage direct current bus, the bidirectional alternating current-direct current converter and the target direct current chopper, and then the vehicle is charged. The control switches arranged at the two ends of the direct current chopper can simply and conveniently switch the charging modes of the vehicle, and are beneficial to improving the charging efficiency.
Preferably, the control method as described above, after the step of determining the vehicle charging mode in which the entire pack of the echelon battery energy storage charging system charges the vehicle according to the first electricity price peak-to-valley period and the first stored electricity amount, further includes:
when the charging mode is an energy storage charging mode for the vehicle, a third control switch arranged among the first fast charging direct current bus, the second fast charging direct current bus and the fast charging gun is controlled to be switched to a state that the first fast charging direct current bus is connected with the fast charging gun;
Or when the charging mode is a mode of charging the power grid to the vehicle, the third control switch is controlled to switch to a state that the second quick charging direct current bus is connected with the quick charging gun.
In a preferred embodiment of the present invention, a third control switch is further disposed between the first fast charging dc bus, the second fast charging dc bus and the fast charging gun, and when the vehicle charging mode is an energy storage charging mode, the first fast charging dc bus and the fast charging gun can be connected by controlling the third control switch; when the vehicle charging mode is the mode that the power grid charges the vehicle, the second quick charging direct current bus can be connected with the quick charging gun by controlling the third control switch. The convenient realization is first to fill the direct current generating line soon and the second fills the direct current generating line soon and fills being connected and disconnection of rifle soon, is favorable to avoiding simultaneously because of at least one of first control switch and second control switch appears when can't break off the problem for electric energy accessible first to fill direct current generating line soon or second fills direct current generating line conduction to fill the rifle soon, leads to being connected battery package or electric wire netting and charging gun under the circumstances that does not need to connect to fill the rifle soon, and the security risk that then leads to.
Specifically, the control method as described above further includes: and in the charging process of the vehicle, when the switching of the peak-to-valley period of electricity price is detected, the current vehicle charging mode is maintained.
In a specific embodiment of the invention, when the switching of the peak-valley period of electricity price is detected in the charging process, the current vehicle charging mode is kept, so that the normal charging of the vehicle is ensured, and the influence of the vehicle and the whole package of gradient battery energy storage charging system caused by the fact that the charging is stopped and restarted in the charging process is avoided.
Preferably, the control method as described above further includes:
when receiving the charging ending information sent by the vehicle, switching from the current vehicle charging mode to a previous standby working mode, wherein the standby working mode is a working mode when the quick charging gun is positioned in the charging gun stand.
In a specific embodiment of the present invention, when receiving the charging end information sent by the vehicle, the mode of the whole package of the echelon battery energy storage charging system is switched from the current vehicle charging mode to the previous standby mode, so that the fast charging gun is powered off, and the safety risk caused by charging the fast charging gun in the process of returning the fast charging gun from the vehicle to the charging gun stand is avoided. Alternatively, one skilled in the art may simply disconnect the target dc chopper from the first and second fast-charging dc buses.
Further, the control method as described above further includes: and when receiving the charging ending information sent by the vehicle, controlling the third control switch to be switched to the unconnected state.
In an embodiment of the present invention, when receiving the charging end information sent by the vehicle, the third control switch is further controlled to switch to the unconnected state, so as to avoid the charging of the fast charging gun caused by that the target dc chopper is still connected to the fast charging gun through the first fast charging dc bus or the second fast charging dc bus, and further avoid the safety risk caused by that.
Referring to fig. 2, preferably, the control method as described above further includes:
Step S201, when the quick charging gun is detected to be positioned in the charging gun stand, a second electricity peak-valley period corresponding to a second current time and a second stored electric quantity of the whole package echelon battery energy storage charging system are obtained, and a standby working mode of the whole package echelon battery energy storage charging system is determined according to the second electricity peak-valley period and the second stored electric quantity;
Step S202, when the standby working mode is a mode of charging a battery pack from a power grid, the power grid is connected with the corresponding battery pack through a bidirectional AC/DC converter, an energy storage DC bus and a DC chopper; or alternatively
When the standby working mode is a mode of preparing the power grid to charge the vehicle, the power grid is connected with a second quick-charging direct-current bus through a bidirectional alternating-current/direct-current converter, an energy storage direct-current bus and a direct-current chopper; or alternatively
When the standby working mode is a mode that the battery pack charges the power grid, the battery pack is connected with the power grid through the direct current chopper, the energy storage direct current bus and the bidirectional alternating current-direct current converter; or alternatively
When the standby working mode is a mode for preparing the battery pack to charge the vehicle, the battery pack is connected with the first fast-charging direct-current bus through the direct-current chopper.
In a specific embodiment of the present invention, when the fast charging gun is located in the charging gun stand, a second electric valence peak-valley period corresponding to a second current time and a second stored electric quantity of the whole package of the echelon battery energy storage charging system are obtained, and according to the second electric valence peak-valley period and the second stored electric quantity, a standby working mode of the whole package of the echelon battery energy storage charging system can be determined under a preset judgment logic, that is, a working mode of the whole package of the echelon battery energy storage charging system when external charging is not needed, so that the realization of the original functions of the whole package of the echelon battery energy storage charging system is ensured.
Specifically, when the standby working mode is a mode of charging the power grid to the battery pack, the power grid needs to be connected with the battery pack, and a circuit schematic diagram of the whole pack echelon battery energy storage and charging system can be specifically seen in fig. 7, and at the moment, the electric energy of the power grid is connected with the battery pack through a bidirectional alternating-current/direct-current converter, an energy storage direct-current bus and a direct-current chopper; when the quick charging gun is detected to be pulled out of the charging gun seat in the power grid charging mode under the battery pack charging mode, the vehicle charging mode is the power grid charging mode, and meanwhile, the circuit schematic diagram of the whole pack echelon battery energy storage charging system can be specifically seen in fig. 8, so that the vehicle and the battery pack are charged simultaneously.
When the standby working mode is a mode of preparing the power grid to charge the vehicle, the power grid is connected with a second quick charging direct current bus through a bidirectional alternating current-direct current converter, an energy storage direct current bus and a direct current chopper, but the direct current chopper and the bidirectional alternating current-direct current converter do not work, so that the quick charging gun is prevented from being charged; when the quick charging gun is detected to be pulled out of the charging gun seat in the power grid charging preparation mode, the vehicle charging mode is the power grid charging mode, and the circuit schematic diagram of the whole pack echelon battery energy storage charging system can be specifically seen in fig. 9, so that only the vehicle is charged. When the standby working mode is a mode that the battery pack charges to the power grid, the battery pack is connected with the power grid through the direct current chopper, the energy storage direct current bus and the bidirectional alternating current-direct current converter, electric energy in the battery pack is sent to the power grid, and a circuit schematic diagram of the whole-pack echelon battery energy storage charging system can be seen in fig. 6. When the quick charging gun is detected to be pulled out of the charging gun seat in the power grid charging preparation mode, the vehicle charging mode is a battery pack charging mode, at the moment, the circuit schematic diagram of the whole pack echelon battery energy storage charging system can be specifically seen in fig. 4, and the battery pack is discharged to the vehicle and the power grid simultaneously.
When the standby working mode is a mode of preparing the battery pack to charge the vehicle, the battery pack is connected with the first quick charging direct current bus through the direct current chopper, but the direct current chopper and the bidirectional alternating current-direct current converter do not work, so that the quick charging gun is prevented from being electrified; when the quick charging gun is detected to be pulled out of the charging gun seat in the preparation mode of charging the battery pack to the vehicle, the vehicle charging mode is the mode of charging the battery pack to the vehicle, and the circuit schematic diagram of the whole pack echelon battery energy storage charging system can be particularly seen in fig. 5, so that only the vehicle is charged.
Specifically, according to the control method described above, the step of determining the standby operation mode of the whole pack of cascade battery energy storage charging system according to the second electricity valence peak-valley period and the second stored electricity quantity includes:
When the second electricity price peak-valley period is a valley period and the second stored electric quantity is smaller than the full electric quantity, determining that the standby working mode is a power grid-to-battery pack charging mode;
When the second electricity price peak-valley period is a valley period and the second stored electric quantity is equal to the full electric quantity, determining that the standby working mode is a power grid charging preparation mode for the vehicle;
When the second electricity price peak-valley period is a non-valley period and the second stored electricity quantity is smaller than a preset threshold value, determining that the standby working mode is a power grid charging preparation mode for the vehicle;
When the second electricity valence peak-valley period is a pre-peak period in the non-valley period and the second stored electric quantity is larger than a preset electric quantity threshold value, determining that the standby working mode is a battery pack charging preparation mode for the vehicle, wherein the pre-peak period is a period in which the second current time is located in the peak period or the normal period and the time span from a switching time point of switching to the valley period is larger than the preset time;
And when the second electricity valence peak-valley period is a peak-to-valley period in the non-valley period and the second stored electric quantity is larger than a preset electric quantity threshold value, determining that the standby working mode is a battery pack to power grid charging mode, wherein the peak-to-valley period is a period in which the second current time is located in the peak period or the normal period and the time span from the switching time point is smaller than or equal to the preset time.
In one embodiment of the present invention, the second electricity peak-to-valley period and the second stored electricity amount are determined when the standby mode of the entire package of the echelon battery energy storage charging system is determined.
If the second electricity price peak-valley period is the valley period and the second stored electric quantity is smaller than the full electric quantity, the whole pack echelon battery energy storage charging system can be determined to be required to be charged at the moment, and the standby working mode is determined to be a power grid to battery pack charging mode because the current electricity price is lower, so that the power grid charges the battery pack. If the second electricity price peak-valley period is a valley period and the second stored electricity quantity is equal to the full electricity quantity, the whole package of gradient battery energy storage system can be determined not to be charged at the moment, and the standby working mode is determined to be a power grid charging preparation mode for charging the vehicle at the moment for realizing low-cost charging of external equipment including new energy automobiles because the current electricity price is lower, so that the vehicle charging preparation mode is prepared in advance, and when the external equipment needs to be charged, the corresponding direct current chopper and the bidirectional alternating current-direct current converter can be directly controlled to work, so that the external equipment can be ensured to be charged rapidly.
If the second electricity price peak-valley period is a non-valley period and the second stored electricity quantity is smaller than a preset threshold value, the electricity price is higher at the moment, and the whole package echelon battery energy storage charging system does not have enough electricity quantity to charge the external equipment, so that when the external equipment needs to be charged, the electric energy must be acquired from the power grid, and therefore, the standby working mode is determined to be a power grid to charge the vehicle ready mode, and the external equipment can be guaranteed to be rapidly charged;
If the second electricity price peak-valley period is a pre-peak period in the non-valley period and the second stored electricity quantity is larger than a preset electricity quantity threshold value, the electricity price is higher at the moment, and the whole battery energy storage charging system has enough electricity quantity to charge the external equipment, and the standby working mode is determined to be a battery pack to charge the vehicle in preparation mode because the time span from a switching time point of switching to the valley period is larger, so that the external equipment is ensured to be rapidly charged, and meanwhile, low-price electricity in the battery pack is used for charging, so that the charging cost is reduced;
If the second electricity price peak-valley period is a peak-to-valley period in the non-valley period and the second stored electricity quantity is larger than the preset electricity quantity threshold value, the electricity price is higher, the whole package of the echelon battery energy storage charging system has enough electricity quantity to charge the external equipment, and the standby working mode is determined to be a battery package to power grid charging mode at the moment due to the switching time point close to the valley period, so that redundant electricity in the whole package of the echelon battery energy storage charging system can be sent to the power grid, namely low-price electricity is sold at high price, and higher income is facilitated.
The switching time point is a time point when switching from a peak period or a normal period of the electricity price to a valley period; the pre-peak period is a period in which the time span of the distance switching time point in the peak period or the normal period is greater than a preset time, and the post-peak period is a period in which the time span of the distance switching time point in the peak period or the normal period is less than or equal to a preset time, wherein the preset time can be set by a technician according to parameters of the whole-package echelon battery energy storage charging system, for example, set to be one hour.
Referring to fig. 3, another preferred embodiment of the present invention also provides a control apparatus comprising:
The first processing module 301 is configured to obtain a first electricity peak-valley period corresponding to a first current time and a first stored electricity quantity of the whole package of the echelon battery energy storage charging system when the fast charging gun is detected to be pulled out of the charging gun stand, and determine a vehicle charging mode of the whole package of the echelon battery energy storage charging system for charging the vehicle according to the first electricity peak-valley period and the first stored electricity quantity;
the second processing module 302 is configured to receive charging request information sent by the vehicle when it is detected that a connection state between the quick charging gun and the vehicle is a connection completion state, and obtain charging required power of the vehicle according to the charging request information;
A third processing module 303, configured to determine at least one target dc chopper from a plurality of dc choppers according to the charging demand power and the vehicle charging mode, where a total output power of the target dc chopper is equal to the charging demand power;
The fourth processing module 304 is configured to control, when the vehicle charging mode is an energy storage charging mode, a first end of the target dc chopper to be connected to the fast charging gun through the first fast charging dc bus, and a second end to be connected to a target battery pack corresponding to the target dc chopper; or when the vehicle charging mode is a mode of charging the power grid to the vehicle, the second end of the control target direct current chopper is connected with the quick charging gun through the second quick charging direct current bus, and the first end of the control target direct current chopper is connected with the power grid through the bidirectional alternating current-direct current converter and the energy storage direct current bus.
Preferably, the control device as described above, the first processing module includes:
the first processing unit is used for determining that the vehicle charging mode is a power grid-to-vehicle charging mode when the first electricity peak-to-valley period is a valley period;
the second processing unit is used for determining that the vehicle charging mode is a mode of charging energy storage to the vehicle if the first stored electric quantity is larger than a preset electric quantity threshold value when the first electric valence peak-valley period is a non-valley period; otherwise, determining the charging mode as a mode of charging the vehicle by the power grid.
Specifically, according to the control method as described above, the fourth processing module includes:
And the third processing unit is used for controlling a first control switch arranged between the first end of the target direct current chopper and the energy storage direct current bus and the first fast charging direct current bus, switching to a state that the target direct current chopper is connected with the first fast charging direct current bus, and controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast charging direct current bus, and switching to a state that the target direct current chopper is connected with the target battery pack.
Specifically, according to the control method as described above, the fourth processing module further includes:
The fourth processing unit is used for controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the second fast-charging direct current bus, controlling a first control switch between the first end of the target direct current chopper and the energy storage direct current bus and between the first fast-charging direct current bus to switch to a state that the target direct current chopper is connected with the bidirectional alternating current-direct current converter.
Preferably, the control device as described above, the control device further includes:
The fifth processing module is used for controlling a third control switch arranged among the first fast charging direct current bus, the second fast charging direct current bus and the fast charging gun to be switched to a state that the first fast charging direct current bus is connected with the fast charging gun when the charging mode is an energy storage charging mode;
or the sixth processing module is used for controlling the third control switch to a state that the second quick charging direct current bus is connected with the quick charging gun when the charging mode is a mode that the power grid charges the vehicle.
Specifically, the control device as described above further includes:
and the seventh processing module is used for keeping the current vehicle charging mode when the switching of the electricity price peak-valley period is detected in the charging process of the vehicle.
Preferably, the control device as described above further includes:
and the eighth processing module is used for switching from the current vehicle charging mode to a previous standby operating mode when receiving the charging ending information sent by the vehicle, wherein the standby operating mode is an operating mode when the quick charging gun is positioned in the charging gun stand.
Further, the control device as described above further includes:
And the ninth processing module is used for controlling the third control switch to be switched to the unconnected state when receiving the charging ending information sent by the vehicle.
Preferably, the control device as described above further includes:
the tenth processing module is used for acquiring a second electricity peak-valley period corresponding to the second current time and second stored electricity quantity of the whole package echelon battery energy storage charging system when the quick charging gun is detected to be positioned in the charging gun base, and determining a standby working mode of the whole package echelon battery energy storage charging system according to the second electricity peak-valley period and the second stored electricity quantity;
The eleventh processing module is used for connecting the power grid with the corresponding battery pack through the bidirectional AC-DC converter, the energy storage DC bus and the DC chopper when the standby working mode is a mode of charging the power grid to the battery pack;
the twelfth processing module is used for connecting the power grid with the second quick-charging direct-current bus through the bidirectional alternating-current/direct-current converter, the energy storage direct-current bus and the direct-current chopper when the standby working mode is a power grid-to-vehicle charging preparation mode;
the thirteenth processing module is used for connecting the battery pack with the power grid through the direct current chopper, the energy storage direct current bus and the bidirectional alternating current-direct current converter when the standby working mode is a mode of charging the battery pack to the power grid;
And the fourteenth processing module is used for connecting the battery pack with the first fast-charging direct-current bus through the direct-current chopper when the standby working mode is a mode of preparing the battery pack for charging the vehicle.
Specifically, the control device as described above, the tenth processing module includes:
the fifth processing unit is used for determining that the standby working mode is a power grid-to-battery pack charging mode when the second electricity price peak-to-valley period is a valley period and the second stored electric quantity is smaller than the full electric quantity;
the sixth processing unit is used for determining that the standby working mode is a power grid charging preparation mode for the vehicle when the second electricity peak-valley period is a valley period and the second stored electric quantity is equal to the full electric quantity;
The seventh processing unit is used for determining that the standby working mode is a power grid-to-vehicle charging preparation mode when the second electricity peak-to-valley period is a non-valley period and the second stored electricity quantity is smaller than a preset electricity quantity threshold value;
An eighth processing unit, configured to determine, when the second electricity peak-valley period is a pre-peak period in the non-valley period and the second stored electricity quantity is greater than a preset electricity quantity threshold, that the standby operation mode is a battery pack charging preparation mode for the vehicle, where the pre-peak period is a period in which the second current time is located in the peak period or the normal period and a time span from a switching time point of switching to the valley period is greater than a preset time;
And the ninth processing unit is used for determining that the standby working mode is a mode of charging the battery pack to the power grid when the second electricity peak-valley period is a post-peak period in the non-valley period and the second stored electricity quantity is larger than a preset electricity quantity threshold value, wherein the post-peak period is a period in which the second current time is located in the peak period or the normal period and the time span from the switching time point is smaller than or equal to the preset time.
The embodiment of the control device of the present invention is a control device corresponding to the embodiment of the control method, and all the implementation means in the embodiment of the control method are applicable to the embodiment of the control device, so that the same technical effects can be achieved.
Referring to fig. 4 to 9, still another preferred embodiment of the present invention provides an overall pack echelon battery energy storage charging system, comprising:
The device comprises a bidirectional AC/DC converter, a DC chopper, a battery pack, a first control switch, a second control switch, a quick charging gun, a first quick charging DC bus, a second quick charging DC bus, an energy storage DC bus and the control device;
One end of the bidirectional AC/DC converter is connected with the power grid, and the other end of the bidirectional AC/DC converter is connected with first connecting points of the first control switches through the energy storage DC bus;
The second connecting contact of each first control switch is connected with the quick charging gun through a first quick charging direct current bus, and the first common contact of each first control switch is connected with the first end of one direct current chopper;
the second end of each direct current chopper is connected with a second common contact of a second control switch;
the third connecting contact of each second control switch is connected with a battery pack, and the fourth connecting contact of each second control switch is connected with the quick charging gun through a second quick charging direct current bus;
the control device is respectively in communication connection with the bidirectional AC-DC converter, the DC chopper, the battery pack, the first control switch, the second control switch and the quick charging gun, and can realize the control method of the whole pack echelon battery energy storage charging system when in use.
Referring to fig. 4 to 9, in a preferred embodiment of the present invention, an overall pack echelon battery energy storage charging system includes: the bidirectional AC/DC converter 1, the DC chopper 2, the battery pack 3, the first control switch 4, the second control switch 5, the quick charging gun 6, the first quick charging DC bus 7, the second quick charging DC bus 8, the energy storage DC bus 10 and the control device 9;
The power grid is connected with the battery pack 3 through the bidirectional AC/DC converter 1, the energy storage DC bus 11, the first control switch 4, the DC chopper 2 and the second control switch 5 to form a first charging circuit, and the electric energy of the power grid can be charged into the battery pack 3 through the first charging circuit and can be fed back to the power grid;
when the first common contact of the first control switch 4 is connected with the second contact and the second common contact of the second control switch 5 is connected with the third contact, the battery pack 3, the second control switch 5, the direct current chopper 2, the first control switch 4, the first quick charging direct current bus 7 and the quick charging gun 6 form a second charging circuit, so that electric energy in the battery pack 3 can be charged into a vehicle through the second charging circuit, and a charging pile function is added for the whole pack of gradient battery energy storage charging system;
The second fast charging direct current bus 8 used for being connected with the fast charging gun 6 is connected with the fourth connecting contact of each second control switch 5, when the second common contact of the second control switch 5 is connected with the fourth contact and the first common contact of the first control switch 4 is connected with the first connecting contact, the power grid, the bidirectional alternating current-direct current converter 1, the energy storage direct current bus 11, the first control switch 4, the direct current chopper 2, the second control switch 5, the second fast charging direct current bus 8 and the fast charging gun 6 form a third charging circuit, so that electric energy in the power grid can be charged into a vehicle through the third charging circuit, and a charging pile function is added for the whole-package gradient battery energy storage charging system;
The control device 9 is respectively in communication connection with the bidirectional ac/dc converter 1, the dc chopper 2, the battery pack 3, the first control switch 4, the second control switch 5 and the fast charging gun 6, so that the control device 9 can control the bidirectional ac/dc converter 1, the dc chopper 2, the battery pack 3, the first control switch 4, the second control switch 5 and the fast charging gun 6, thereby realizing the control method.
In summary, the technical scheme provided by the invention adds the function of the charging pile for the whole-package gradient battery energy storage charging system, and sets a quick charging direct current bus at each of the two ends of the direct current chopper 2, when the charging pile function of the whole-package gradient battery energy storage charging system is required to be used, the target battery package and the target direct current chopper 2 meeting the charging requirement are determined according to the charging requirement of the vehicle, and the charging mode is determined according to the peak-to-valley period of electricity, so that the structure connected with the two ends of the target direct current chopper 2 only needs to be changed when the battery package is charged according to the charging mode, the charging of the vehicle can be realized under the condition that the normal charging and discharging of other battery packages 3 are not influenced, and in the energy storage charging mode, the low-price electricity in the target battery package can be charged into the vehicle only through the target direct current chopper 2, thereby being beneficial to improving the charging efficiency and reducing the charging cost.
Referring to fig. 4 to 9, the whole pack echelon battery energy storage charging system as described above further comprises:
And the third common contact of the third control switch is connected with the quick charging gun, the fifth connecting contact is connected with the first quick charging direct current bus, and the sixth connecting contact is connected with the second quick charging direct current bus.
In a specific embodiment of the present invention, a third control switch 10 is further disposed between the first fast charging dc bus 7, the second fast charging dc bus 8 and the fast charging gun 6, and when the vehicle charging mode is the energy storage charging mode, the first fast charging dc bus 7 and the fast charging gun 6 can be connected by controlling the third control switch 10; when the vehicle charging mode is the power grid to vehicle charging mode, the second fast charging direct current bus 8 can be connected with the fast charging gun 6 by controlling the third control switch 10. The connection between the first fast charging direct current bus 7 and the second fast charging direct current bus 8 and the fast charging gun 6 is realized, and meanwhile, when the problem that the connection cannot be disconnected due to at least one of the first control switch 4 and the second control switch 5 occurs, electric energy can be conducted to the fast charging gun 6 through the first fast charging direct current bus 7 or the second fast charging direct current bus 8, so that the battery pack 3 or the power grid is connected with the fast charging gun 6 under the condition that the vehicle does not need to be charged, and the safety risk caused by the electric energy is avoided.
The dashed arrows in fig. 4 to 9 indicate the flow direction of the electric energy.
Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims (11)

1. The control method of the whole-package echelon battery energy storage charging system is applied to a control device and is characterized by comprising the following steps of:
When the quick charging gun is detected to be pulled out of a charging gun base, a first electricity peak-valley period corresponding to a first current time and a first stored electric quantity of an integral package echelon battery energy storage charging system are obtained, and a vehicle charging mode of the integral package echelon battery energy storage charging system for charging a vehicle is determined according to the first electricity peak-valley period and the first stored electric quantity;
When the connection state of the quick charging gun and the vehicle is detected to be a connection completion state, receiving charging request information sent by the vehicle, and obtaining charging required power of the vehicle according to the charging request information;
Determining at least one target direct current chopper from a plurality of direct current choppers according to the charging demand power and the vehicle charging mode, wherein the total output power of the target direct current chopper is equal to the charging demand power;
When the vehicle charging mode is an energy storage vehicle charging mode, a first end of the target direct current chopper is controlled to be connected with the quick charging gun through a first quick charging direct current bus, and a second end of the target direct current chopper is controlled to be connected with a target battery pack corresponding to the target direct current chopper; or when the vehicle charging mode is a mode of charging the power grid to the vehicle, controlling the second end of the target direct current chopper to be connected with the quick charging gun through a second quick charging direct current bus, and connecting the first end with the power grid through a bidirectional alternating current-direct current converter and an energy storage direct current bus;
the step of determining a vehicle charging mode of the whole pack echelon battery energy storage charging system for charging the vehicle according to the first electricity peak-valley period and the first stored electric quantity comprises the following steps:
When the first electricity price peak-valley period is a valley period, determining that the vehicle charging mode is a power grid-to-vehicle charging mode;
when the first electricity price peak-valley period is a non-valley period, if the first stored electricity quantity is larger than a preset electricity quantity threshold value, determining that the vehicle charging mode is the energy storage vehicle charging mode; otherwise, determining the charging mode as a mode of charging the power grid to the vehicle;
The step of controlling the second end of the target direct current chopper to be connected with the quick charging gun through a second quick charging direct current bus, and the step of controlling the first end to be connected with the power grid through an energy storage direct current bus and a bidirectional alternating current-direct current converter comprises the following steps:
And controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and a second fast charging direct current bus, switching to a state that the target direct current chopper is connected with the second fast charging direct current bus, and controlling a first control switch between the first end of the target direct current chopper and the energy storage direct current bus and the first fast charging direct current bus, switching to a state that the target direct current chopper is connected with the bidirectional alternating current-direct current converter.
2. The control method according to claim 1, wherein the step of controlling the first end of the target dc chopper to be connected to the fast charge gun through a first fast charge dc bus and the second end to be connected to the target battery pack comprises:
The method comprises the steps of controlling a first control switch arranged between a first end of the target direct current chopper and the energy storage direct current bus and a first quick charging direct current bus, switching to a state that the target direct current chopper is connected with the first quick charging direct current bus, controlling a second control switch arranged between a second end of the target direct current chopper and the target battery pack and a second quick charging direct current bus, and switching to a state that the target direct current chopper is connected with the target battery pack.
3. The control method according to claim 1, characterized in that, after the step of determining a vehicle charging mode in which the entire pack of gradient battery energy storage charging system charges a vehicle according to the first electricity valence peak-valley period and the first stored electricity amount, the control method further comprises:
when the charging mode is an energy storage charging mode for a vehicle, a third control switch arranged among the first quick charging direct current bus, the second quick charging direct current bus and the quick charging gun is controlled to be switched to a state that the first quick charging direct current bus is connected with the quick charging gun;
Or when the charging mode is the mode of charging the power grid to the vehicle, controlling the third control switch to a state that the second quick charging direct current bus is connected with the quick charging gun.
4. The control method according to claim 1, characterized by further comprising: and in the charging process of the vehicle, when the peak-to-valley period switching of electricity price is detected, the current charging mode of the vehicle is maintained.
5. The control method according to claim 1, characterized by further comprising:
When receiving the charging ending information sent by the vehicle, switching from a current vehicle charging mode to a previous standby operating mode, wherein the standby operating mode is an operating mode when the quick charging gun is positioned in the charging gun base.
6. A control method according to claim 3, characterized by further comprising: and when receiving the charging ending information sent by the vehicle, controlling the third control switch to be switched to an unconnected state.
7. The control method according to claim 1, characterized by further comprising:
When the quick charging gun is detected to be positioned in the charging gun stand, a second electricity peak-valley period corresponding to a second current time and a second stored electric quantity of the whole package echelon battery energy storage charging system are obtained, and a standby working mode of the whole package echelon battery energy storage charging system is determined according to the second electricity peak-valley period and the second stored electric quantity;
When the standby working mode is a mode of charging a battery pack from a power grid, the power grid is connected with the corresponding battery pack through the bidirectional AC/DC converter, the energy storage DC bus and the DC chopper;
When the standby working mode is a mode for preparing a power grid to charge a vehicle, the power grid is connected with the second quick-charging direct-current bus through the bidirectional alternating-current/direct-current converter, the energy storage direct-current bus and the direct-current chopper;
when the standby working mode is a mode that a battery pack charges to a power grid, the battery pack is connected with the power grid through a direct current chopper, an energy storage direct current bus and a bidirectional alternating current-direct current converter;
When the standby working mode is a battery pack charging preparation mode for a vehicle, the battery pack is connected with a first quick-charging direct-current bus through a direct-current chopper.
8. The control method of claim 7, wherein the step of determining the standby mode of operation of the entire pack of echelon battery energy storage charging system based on the second electricity peak-to-valley period and the second stored electricity amount comprises:
When the second electricity price peak-valley period is a valley period and the second stored electric quantity is smaller than the full electric quantity, determining that the standby working mode is a power grid to battery pack charging mode;
When the second electricity price peak-valley period is a valley period and the second stored electric quantity is equal to the full electric quantity, determining that the standby working mode is a power grid-to-vehicle charging preparation mode;
When the second electricity price peak-valley period is a non-valley period and the second stored electricity quantity is smaller than a preset electricity quantity threshold value, determining that the standby working mode is a power grid-to-vehicle charging preparation mode;
When the second electricity price peak-valley period is a peak-front period in a non-valley period and the second stored electricity quantity is larger than a preset electricity quantity threshold value, determining that the standby working mode is a battery pack charging preparation mode for a vehicle, wherein the peak-front period is a period in which the second current time is located in a peak period or a normal period and a time span from a switching time point of switching to the valley period is larger than a preset time;
And when the second electricity price peak-valley period is a peak-to-valley period in the non-valley period and the second stored electricity quantity is larger than the preset electricity quantity threshold value, determining that the standby working mode is a battery pack charging mode, wherein the peak-to-valley period is a period in which the second current time is located in the peak period or the normal period and the time span from the switching time point is smaller than or equal to the preset time.
9. A control apparatus, characterized by comprising:
The first processing module is used for acquiring a first electricity peak-valley period corresponding to a first current time and a first stored electric quantity of the whole package echelon battery energy storage charging system when the quick charging gun is pulled out of the charging gun base, and determining a vehicle charging mode of the whole package echelon battery energy storage charging system for charging a vehicle according to the first electricity peak-valley period and the first stored electric quantity;
The second processing module is used for receiving charging request information sent by the vehicle when the connection state of the quick charging gun and the vehicle is detected to be a connection completion state, and obtaining charging demand power of the vehicle according to the charging request information;
A third processing module configured to determine at least one target dc chopper from a plurality of dc choppers according to the charging demand power and the vehicle charging mode, wherein a total output power of the target dc chopper is equal to the charging demand power;
the fourth processing module is used for controlling the first end of the target direct current chopper to be connected with the quick charging gun through a first quick charging direct current bus when the vehicle charging mode is an energy storage charging mode, and the second end of the target direct current chopper is connected with a target battery pack corresponding to the target direct current chopper; or when the vehicle charging mode is a mode of charging the power grid to the vehicle, controlling the second end of the target direct current chopper to be connected with the quick charging gun through a second quick charging direct current bus, and connecting the first end with the power grid through a bidirectional alternating current-direct current converter and an energy storage direct current bus;
the first processing module includes:
The first processing unit is used for determining that the vehicle charging mode is the power grid-to-vehicle charging mode when the first electricity price peak-to-valley period is a valley period;
The second processing unit is used for determining that the vehicle charging mode is the energy storage vehicle charging mode if the first stored electric quantity is larger than a preset electric quantity threshold value when the first electric valence peak-valley period is a non-valley period; otherwise, determining the charging mode as a mode of charging the power grid to the vehicle;
The fourth processing module includes:
The fourth processing unit is used for controlling a second control switch arranged between the second end of the target direct current chopper and the target battery pack and the second fast charging direct current bus, switching to a state that the target direct current chopper is connected with the second fast charging direct current bus, and controlling a first control switch between the first end of the target direct current chopper and the energy storage direct current bus and the first fast charging direct current bus, and switching to a state that the target direct current chopper is connected with the bidirectional alternating current-direct current converter.
10. An integral echelon battery energy storage charging system, comprising:
a bidirectional ac-dc converter, a dc chopper, a battery pack, a first control switch, a second control switch, a fast charge gun, a first fast charge dc bus, a second fast charge dc bus, an energy storage dc bus, and a control device according to claim 9;
one end of the bidirectional AC/DC converter is connected with a power grid, and the other end of the bidirectional AC/DC converter is connected with first connecting points of the first control switches through an energy storage DC bus;
The second connecting contact of each first control switch is connected with the quick charging gun through a first quick charging direct current bus, and the first common contact of each first control switch is connected with the first end of one direct current chopper;
A second end of each of the direct current chopper is connected with a second common contact of one of the second control switches;
the third connecting contact of each second control switch is connected with one battery pack, and the fourth connecting contact of each second control switch is connected with the quick charging gun through a second quick charging direct current bus;
The control device is respectively in communication connection with the bidirectional AC-DC converter, the DC chopper, the battery pack, the first control switch, the second control switch and the quick charging gun, and the control device can realize the control method of the whole pack echelon battery energy storage charging system according to any one of claims 1 to 8 when in use.
11. The full pack echelon battery energy storage charging system of claim 10, further comprising:
And a third control switch in communication connection with the control device, wherein a third common contact of the third control switch is connected with the quick charging gun, a fifth connection contact is connected with the first quick charging direct current bus, and a sixth connection contact is connected with the second quick charging direct current bus.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106253314A (en) * 2016-07-27 2016-12-21 上海玖行能源科技有限公司 Communication base station ferric phosphate lithium cell echelon utilizes charge-discharge system and control method
CN110556850A (en) * 2019-07-19 2019-12-10 国网辽宁省电力有限公司大连供电公司 Capacity configuration method for electric vehicle retired battery used for energy storage of battery replacement station

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009046605A1 (en) * 2009-11-11 2011-05-12 Robert Bosch Gmbh Energy transfer system for an energy storage system
CN110932298A (en) * 2019-12-03 2020-03-27 浙江华友电力技术有限公司 System for utilizing waste storage batteries in whole package in storage and charging station in echelon mode and control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106253314A (en) * 2016-07-27 2016-12-21 上海玖行能源科技有限公司 Communication base station ferric phosphate lithium cell echelon utilizes charge-discharge system and control method
CN110556850A (en) * 2019-07-19 2019-12-10 国网辽宁省电力有限公司大连供电公司 Capacity configuration method for electric vehicle retired battery used for energy storage of battery replacement station

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