CN116111675A - Current regulation method and device and charging equipment - Google Patents

Current regulation method and device and charging equipment Download PDF

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Publication number
CN116111675A
CN116111675A CN202211697290.0A CN202211697290A CN116111675A CN 116111675 A CN116111675 A CN 116111675A CN 202211697290 A CN202211697290 A CN 202211697290A CN 116111675 A CN116111675 A CN 116111675A
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China
Prior art keywords
current
charging
target
phase
regulating
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CN202211697290.0A
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Chinese (zh)
Inventor
秦斐
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Xi'an Telingchong New Energy Technology Co ltd
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Xi'an Telingchong New Energy Technology Co ltd
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Priority to CN202211697290.0A priority Critical patent/CN116111675A/en
Publication of CN116111675A publication Critical patent/CN116111675A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • 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
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Protection Of Static Devices (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides a current regulation method, a current regulation device and charging equipment, and relates to the technical field of power control, wherein the method comprises the steps of obtaining load current of a target phase; under the condition that the load current of the target phase is larger than the preset phase current, determining the target down-regulating current of the target phase according to the preset phase current and the load current; and adjusting the working current of each charging device according to the target down-regulating current and the device down-regulating current of the target phase. According to the technical scheme, when the load current of any phase is higher, the load current of the phase can be timely reduced, so that overload protection can be timely realized, and the reliability of the overload protection is improved.

Description

Current regulation method and device and charging equipment
Technical Field
The present disclosure relates to the field of power electronics technologies, and in particular, to a current adjustment method, a current adjustment device, and a charging device.
Background
With the continuous development of new energy technology, the electric automobile technology is also developing at a high speed, and the charging pile is used as a charging facility of the electric automobile, and the scale of the charging pile is also increasing.
In a medium-to-large charging station for charging an electric vehicle, when a charging pile charges the electric vehicle, the charging power may exceed the rated power of a power grid, resulting in overload. When overload occurs, the charging pile is abnormal sound when the charging pile is light, and the charging pile or the circuit is burnt when the charging pile is heavy.
In order to reduce the occurrence of overload phenomenon, in the conventional technology, a circuit breaker is generally added into a charging pile, that is, when the charging current exceeds the rated current of the circuit breaker, the circuit breaker automatically trips, so that the damage to the charging pile when the overload condition occurs is reduced.
However, when the circuit breaker trips, the charging pile is directly powered off and cannot be recovered later, and the control strategy is single and inflexible; or when the breaker is selected improperly, the breaker is not tripped or is tripped by mistake, and the reliability is low.
Disclosure of Invention
In view of this, the present application provides a current adjustment method, apparatus and charging device, which are used for improving the reliability of overload protection, enriching the control policy under the overload condition, and further improving the user experience.
To achieve the above object, in a first aspect, an embodiment of the present application provides a current adjustment method, including:
acquiring load current of a target phase;
determining a target down-regulating current of the target phase according to the preset phase current and the load current under the condition that the load current of the target phase is larger than the preset phase current;
according to the target down-regulating current and the device down-regulating current of the target phase, adjusting the working current of each charging device; wherein the device-down-tunable current of the target phase is the sum of the down-tunable currents of the charging devices.
As an optional implementation manner of the embodiments of the present application, the adjusting the working current of each charging device according to the target down-regulating current and the device down-regulating current of the target phase includes:
determining a target shutdown device from among the charging devices to which the target phase is connected according to a differential current between the target down-regulated current and the device down-regulated current and a priority of each charging device to which the target phase is connected, when the target down-regulated current is greater than the device down-regulated current of the target phase;
controlling the target stopping equipment to stop working, and controlling other charging equipment except the target stopping equipment to work according to the specified charging current; the priority of the charging equipment is determined according to the charging mode and/or the charging duration of the charging equipment;
and adjusting the working current of each charging device according to the target down-regulating current under the condition that the target down-regulating current is smaller than or equal to the device down-regulating current.
As an optional implementation manner of the embodiment of the present application, the adjusting the operating current of each charging device according to the target down-regulating current includes:
And according to the target down-regulating current and the down-regulating current of each charging device, the working current of each charging device is down-regulated.
As an optional implementation manner of the embodiment of the present application, the determining a target shutdown device from each charging device includes:
traversing each charging device in the order of low priority;
in each traversing operation, determining the traversed charging equipment as target charging equipment, and updating the differential current, wherein the updated differential current is the difference of the differential current before updating minus the preset charging current;
continuing traversing the next charging device if the differential current is greater than a preset value; and stopping traversing under the condition that the differential current is smaller than or equal to a preset value.
As an optional implementation manner of the embodiment of the present application, the power supply of the charging device includes a power grid power supply unit and a new energy power supply unit, and the charging mode of the charging device includes: a fast charging mode and an energy saving mode, in which the charging device can be powered by the new energy;
the priorities of the charging devices in different charging modes are different; the priority of the charging equipment in the fast charging mode is higher than that of the charging equipment in the energy-saving mode, and the priority of the target stopping equipment is not higher than that of other charging equipment;
And/or the number of the groups of groups,
in the charging devices in the same charging mode, the priority of each charging device is gradually reduced according to the sequence of charging time from long to short; and the priority of the target shutdown device is not higher than that of other charging devices.
As an optional implementation manner of the embodiment of the present application, the energy saving mode includes: a first energy saving mode and a second energy saving mode, wherein in the first energy saving mode, the charging equipment can be continuously charged according to the preset charging current under the power supply of the power grid power supply unit; in the second energy-saving mode, the current acquired by the charging equipment from the power grid power supply unit is smaller than or equal to a preset maximum available power grid current, and the maximum available power grid current is smaller than the preset charging current;
the priority of the charging device in the first energy saving mode is greater than the priority of the charging device in the second energy saving mode.
As an optional implementation manner of the embodiment of the present application, the method further includes:
and controlling at least one target stopping device to resume charging in the condition that the load current of the target phase is lower than the preset phase current and the paused target stopping device exists.
In a second aspect, embodiments of the present application provide a current regulation device, including: the device comprises an acquisition module and a control module, wherein:
the acquisition module is used for acquiring the load current of the target phase;
the control module is used for determining a target down-regulating current of the target phase according to the preset phase current and the load current under the condition that the load current of the target phase is larger than the preset phase current;
according to the target down-regulating current and the device down-regulating current of the target phase, adjusting the working current of each charging device; wherein the device-down-tunable current of the target phase is the sum of the down-tunable currents of the charging devices.
As an optional implementation manner of the embodiment of the present application, the control module is specifically configured to:
determining a target shutdown device from among the charging devices to which the target phase is connected according to a differential current between the target down-regulated current and the device down-regulated current and a priority of each charging device to which the target phase is connected, when the target down-regulated current is greater than the device down-regulated current of the target phase;
controlling the target stopping equipment to stop working, and controlling other charging equipment except the target stopping equipment to work according to the specified charging current; the priority of the charging equipment is determined according to the charging mode and/or the charging duration of the charging equipment;
And adjusting the working current of each charging device according to the target down-regulating current under the condition that the target down-regulating current is smaller than or equal to the device down-regulating current.
As an optional implementation manner of the embodiment of the present application, the control module is specifically configured to: and according to the target down-regulating current and the down-regulating current of each charging device, the working current of each charging device is down-regulated.
As an optional implementation manner of the embodiment of the present application, the control module is specifically configured to:
traversing each charging device in the order of low priority;
in each traversing operation, determining the traversed charging equipment as target charging equipment, and updating the differential current, wherein the updated differential current is the difference of the differential current before updating minus the preset charging current;
continuing traversing the next charging device if the differential current is greater than a preset value; and stopping traversing under the condition that the differential current is smaller than or equal to a preset value.
As an optional implementation manner of the embodiment of the present application, the power supply of the charging device includes a power grid power supply unit and a new energy power supply unit, and the charging mode of the charging device includes: a fast charging mode and an energy saving mode, in which the charging device can be powered by the new energy;
The priorities of the charging devices in different charging modes are different; the priority of the charging equipment in the fast charging mode is higher than that of the charging equipment in the energy-saving mode, and the priority of the target stopping equipment is not higher than that of other charging equipment;
and/or;
in the charging devices in the same charging mode, the priority of each charging device is gradually reduced according to the sequence of charging time from long to short; and the priority of the target shutdown device is not higher than that of other charging devices.
As an optional implementation manner of the embodiment of the present application, the energy saving mode includes: a first energy saving mode and a second energy saving mode, wherein in the first energy saving mode, the charging equipment can be continuously charged according to the preset charging current under the power supply of the power grid power supply unit; in the second energy-saving mode, the current acquired by the charging equipment from the power grid power supply unit is smaller than or equal to a preset maximum available power grid current, and the maximum available power grid current is smaller than the preset charging current;
the priority of the charging device in the first energy saving mode is greater than the priority of the charging device in the second energy saving mode.
As an optional implementation manner of the embodiment of the present application, the control module is further configured to:
and controlling at least one target stopping device to resume charging in the condition that the load current of the target phase is lower than the preset phase current and the paused target stopping device exists.
In a third aspect, an embodiment of the present application provides a charging device, including: a memory and a processor, the memory for storing a computer program; the processor is configured to perform the method of the first aspect or any implementation of the first aspect when the computer program is invoked.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of the first aspect or any implementation of the first aspect.
In a fifth aspect, embodiments of the present application provide a computer program product, which, when run on a charging device, causes the charging device to perform the current regulation method according to any one of the first aspects above.
According to the technical scheme provided by the embodiment of the application, the load current of the target phase is obtained, and under the condition that the load current of the target phase is larger than the preset phase current, the target down-regulating current of the target phase is determined according to the preset phase current and the load current; and adjusting the working current of each charging device according to the target down-regulating current and the device down-regulating current of the target phase. Therefore, when the load current of any phase is higher, the load current of the phase can be timely reduced, so that overload protection can be timely realized, the reliability of the overload protection is improved, meanwhile, the control strategy under the overload condition can be enriched, and further, the user experience can be improved.
Drawings
Fig. 1 is a schematic structural diagram of an electricity consumption system according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a current regulation method according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of another current regulation method according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a current adjusting device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a charging device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the description of the embodiments of the application is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application.
In order to facilitate understanding of the technical solutions in the embodiments of the present application, the following first explains some terms related to the embodiments of the present application:
referring to fig. 1, fig. 1 is a schematic diagram of an electrical system architecture according to an embodiment of the present application.
As shown in fig. 1, the power supply of the power utilization system includes a power grid power supply unit (i.e., a power grid 01) and a new energy power supply unit, where the new energy power supply unit is a solar power supply unit (including a photovoltaic module 07 and a photovoltaic inverter 08) by way of example, and it is understood that the new energy power supply unit may also include other power supply units such as wind energy. The charging devices in the system may be charging posts, but may also be other types of charging devices, here exemplified as charging posts 11.
The power supply of the power system may further include an energy storage battery 05 for storing unused solar energy to improve the energy utilization rate.
Each power supply unit may further include a metering device, specifically, as shown in fig. 1, the power grid power supply unit includes a power grid side metering device 03, the new energy source power supply unit includes a photovoltaic side metering device 09, and the energy storage battery 05 has a corresponding electric energy metering device 06. The power consumption system may further include: junction box 02, console 04, router 10 and charging stake 11.
It will be appreciated that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the power system. In other embodiments of the present application, the electrical system may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Specifically, the power grid 01 is connected with the junction box 02 through the power grid side metering device 03, and the power grid 01 is used for providing electric energy for the whole power utilization system; the junction box 02 is connected with each charging pile 11 and other electric equipment (not shown), and is mainly used for providing required current for each charging pile and each electric equipment, and each phase line separated by the junction box 02 can be connected with one or more charging piles 11 in parallel.
The grid-side metering device 03 is mainly used for measuring and recording the generated energy, finding problems in the operation of the grid in time and feeding the problems back to the console 04.
The console 04 is connected with the junction box 02, so that on one hand, the operation parameters such as voltage, current, electric quantity, power and the like of the on-site charging pile can be monitored in real time, and on the other hand, the state of the charging pile can be monitored, and if an alarm or a fault exists, the on-site charging pile can be timely maintained; meanwhile, the running state of the power grid can be monitored, and the power grid is maintained.
The energy storage battery 05 is connected with the junction box 02 through the electric energy metering device 06 and is mainly used for storing/providing electric energy. The photovoltaic module 07 is connected with the junction box 02 through the photovoltaic inverter 08 and the photovoltaic side metering device 09, the photovoltaic module 07 can convert light energy into electric energy, the electric energy generated by the photovoltaic module 07 can be converted into 220V alternating current through the photovoltaic inverter 08, and the 220V alternating current can be stored in the energy storage battery 05 when electric equipment in a power grid cannot be consumed; when the photovoltaic module 07 is insufficient in power generation, the energy storage battery 05 can provide the electric energy stored by the energy storage battery to the electric equipment for use.
The electric energy metering device 06 is mainly used for acquiring the discharge current of the energy storage battery 05.
The photovoltaic side metering device 09 is mainly used for acquiring the supply current of the photovoltaic module 07.
The router 10 is connected with each charging pile 11, and each charging pile 11 can communicate with each other through the router 10; the router 10 may also establish a connection with the console 04, enabling bidirectional data transfer between the charging facility and the console 04.
In each charging pile 11, one charging pile may be selected as a master charging pile, and the other charging piles may be selected as slave charging piles. The main charging pile can collect operation parameters of each charging pile 11 through the router 10, and can be connected with each metering device (namely a power grid side metering device 03, an electric energy metering device 06 and a photovoltaic side metering device 09) in a power grid system to acquire line information acquired by each metering device, and regulate and control charging current of each charging pile 11 according to the acquired information; the charging post 11 may also communicate with other devices (such as the junction box 02 and the console 04) to obtain line parameters, such as load current of each phase, maximum allowable current of the power grid, etc.
The charging pile 11 can provide one or more charging modes for users to meet different requirements of the users, and meanwhile, the utilization rate of electric energy in the power utilization system is improved. Here, the charging pile 11 may provide the user with two charging modes, i.e., a quick charging mode and an energy saving mode, and the user may select an appropriate charging mode to charge according to his/her own situation. In the energy saving mode, the charging pile 11 can supply power by using new energy. In the fast charging mode, the charging pile 11 can be supplied with power from the grid.
Specifically, the FAST charging mode may also be referred to as FAST mode, and may be selected when a user needs FAST power replenishment, in which charging pile 11 may charge according to a smaller value of the maximum charging power available under the current power grid and the rated output power of the vehicle.
The energy saving mode may be further divided into a first energy saving mode and a second energy saving mode to provide a more flexible charging manner.
The first energy saving mode, which may also be referred to as an ecological energy saving optimization (Ecology Conservation Optimization, ECO) mode or a green continuous charging mode, when the generated power of the new energy (such as solar energy) is greater than the minimum charging power of the charging device, the charging pile 11 may charge according to the generated power of the solar energy; when the solar energy does not meet the requirement that the charging pile 11 is charged according to the minimum charging power, for example, the solar energy can be preferentially used by the charging pile 11 in the afternoon or overcast days or at night, and the electric quantity of the rest part of the insufficient minimum charging power can be obtained from the power grid so as to be charged according to the minimum charging power, so that the traveling requirement of the next day is ensured, that is, the charging pile 11 in the ECO mode can be continuously charged according to the minimum charging current under the power supply of the power grid power supply unit. The minimum charging current of the charging pile 11 may be set by a merchant before the charging device leaves the factory, or may provide a range for the user, and a certain value selected by the user is taken as an example in the embodiment of the present application, and 6A is taken as an example for illustration.
The second energy-saving mode, which may also be referred to as eco+ mode or green economical charging mode, when the generated power of the new energy (such as solar energy) is greater than the minimum charging power of the charging pile 11, the charging pile 11 may charge according to the generated power of the solar energy; when the solar energy does not satisfy the charging of the charging peg 11 at the minimum charging power, for example, in the afternoon or overcast days or at night, the charging peg 11 may suspend the charging. When the charging pile 11 is frequently started and stopped, damage to the charging device may be caused, and in order to reduce the occurrence of such a situation, the charging pile 11 may be started again when the charging power of the solar energy is greater than the starting current threshold of the charging device. In order to fully utilize the generated energy of solar energy, an eco+max Current setting item can be provided for a user, the setting item setting range can be, for example, 0-5A, as the maximum available grid Current allowed to borrow, for example, 3A,ECO+Max Current is set to 2A, when the condition of the minimum charging Current 6A of the charging pile 11 is not met, the charging equipment stops charging; if eco+max Current is set to 3A, it means that the grid 3A can be consumed, the Current solar power generation is greater than 3A, and the sum of the two can satisfy the condition of the minimum charging Current 6A, i.e. charging can be performed according to the minimum charging Current 6A.
The electricity utilization system provided by the embodiment of the application can adjust the current of the charging piles 11 on each phase line according to the running state of each line in the system, so that overload protection can be timely realized, and the reliability of overload protection is improved, wherein the electronic equipment for determining the current adjustment scheme can be a main charging pile or other electronic equipment in the system, for example, after being determined by the power grid side metering device 03, the current adjustment scheme corresponding to each charging pile 11 is distributed to each charging pile 11 so as to perform current adjustment; alternatively, new electronic devices may be added to the power consumption system, and the current adjustment schemes may be determined by the electronic devices and distributed to the charging piles 11. In the specific implementation, the selection may be made as required, and the embodiment of the present application is not particularly limited.
The above-described current regulation process will be described below.
Fig. 2 is a schematic flow chart of a current regulation method provided in an embodiment of the present application, and as shown in fig. 2, the current regulation method provided in an embodiment of the present application may include the following steps:
s110, acquiring the load current of the target phase.
Wherein the target phase may be any phase of the power grid. The load current of the target phase can be detected by a grid-side metering device or by a main charging device.
And S120, determining a target down-regulating current of the target phase according to the preset phase current and the load current under the condition that the load current of the target phase is larger than the preset phase current.
The preset phase current may be a rated phase current, or may be 95% of a fuse current, or may be a maximum safe current, which is not limited in this embodiment, and the adjustment principle is illustrated by using the preset phase current as the rated phase current.
Under the condition that the load current of the target phase is larger than the preset phase current, the overload phenomenon is indicated to occur, if the control is not timely carried out, abnormal sound is generated on the charging equipment, and the charging equipment or a circuit is burnt out if the abnormal sound is heavy, so that the charging current needs to be reduced to ensure that the power grid system can normally operate.
Specifically, the current that the target phase needs to be down-regulated (i.e., the target down-regulated current of the target phase) may be determined from the difference between the preset phase current and the load current. The target down-regulation current may be greater than or equal to the load current minus the preset phase current.
S130, adjusting the working current of each charging device according to the target down-regulating current of the target phase and the device-down-regulating current of the target phase.
Specifically, it may be first determined whether the target down-regulated current of the target phase is greater than the device-down-regulated current of the target phase, where the device-down-regulated current of the target phase is a sum of the down-regulated currents of the charging devices connected to the target phase.
If the target down-regulating current of the target phase is larger than the device down-regulating current of the target phase, the condition that the working current of each charging device cannot meet the requirement of the target down-regulating current is indicated by down-regulating, and at the moment, the load current of the target phase is not higher than the preset phase current by suspending one or more charging devices.
Specifically, the target shutdown device may be determined from among the respective charging devices based on the difference current between the target down-current and the device-down-tunable current and the priority of the respective charging devices to which the target phase is connected.
If the target down-regulating current of the target phase is greater than the device down-regulating current of the target phase, a differential current between the target down-regulating current and the device down-regulating current, that is, a current to be shut down, may be calculated, and then a charging device to be shut down (that is, a target shut down device) may be determined according to the differential current.
The difference current is the difference between the target down-regulating current and the device down-regulating current.
In determining the target shutdown device, one or more shutdown devices may be arbitrarily selected; in order to make the determined shutdown device more appropriate, in this embodiment, the target shutdown device may be determined according to the priority of each charging device to which the target phase is connected.
As previously described, each charging device to which the target phase is connected may include a FAST mode, ECO mode, and/or eco+ mode charging device.
In some embodiments, the priority of each charging device may be set according to a charging mode, where the priorities of the charging devices in FAST mode, ECO mode, eco+ mode decrease in sequence.
In some embodiments, the priority of each charging device may also be set according to the charging time period, where the priority of each charging device gradually decreases in the order of charging time from long to short.
In some embodiments, the priority of each charging device may be set according to the charging mode and the charging duration at the same time, where the priorities of the charging devices in the FAST mode, the ECO mode, and the eco+ mode are sequentially reduced, where the priorities of the charging devices in the different types of charging modes are different; in the charging devices of the same charging mode, the priority of each charging device gradually decreases in the order of charging time from long to short.
Specifically, when determining the target shutdown apparatus, each charging apparatus may be traversed in order of priority from low to high; in each traversing operation, determining the traversed charging equipment as target charging equipment, and updating the difference current, wherein the updated difference current is the difference of the difference current before updating minus the preset charging current; under the condition that the difference current is larger than a preset value, continuing to traverse the next charging equipment; and stopping traversing under the condition that the difference current is smaller than or equal to a preset value. The preset value may be 0A, or may be another value, which is not particularly limited in the embodiment of the present application, and the working principle is only illustrated by taking the preset value of 0A as an example.
If the target down-regulating current of the target phase is smaller than or equal to the device down-regulating current of the target phase, the requirement of the target down-regulating current can be met by down-regulating the working current of each charging device, and the load current of the target phase is not higher than the preset phase current. Thus, the operating current of each charging device can be adjusted according to the target down-regulating current.
Specifically, when the working current of each charging device is adjusted according to the target down-regulating current, the current required to be down-regulated by each charging device may be determined according to the target down-regulating current, and then the working current of each charging device may be adjusted according to the determination result.
When determining that each charging device needs to be down-regulated current according to the target down-regulated current, selecting a plurality of charging devices according to a certain sequence (the sum of the down-regulated currents is greater than or equal to the target down-regulated current), and distributing the target down-regulated current to the charging devices; the operating current of each charging device may also be adjusted down according to the target adjusted down current and the adjustable down current of each charging device, and the target adjusted down current may be allocated to each charging device with an adjustable down current greater than 0.
Specifically, the target downregulating current may be proportionally distributed to each charging device according to a ratio relationship between the downregulating currents of each charging device to which the target phase is connected.
It will be appreciated that other distribution methods may be used to determine the operating current of each charging device, and this embodiment is not particularly limited.
And then, controlling the target stopping equipment to stop working, and controlling other charging equipment except the target stopping equipment to work according to a preset charging current.
The preset charging current may be a minimum charging current set by the charging device, or may be a value set by a user, which is not specifically defined in the embodiment of the present application, and the working principle is described by taking the preset charging current as an example of the minimum charging current set by the charging device.
After the target stopping devices are determined, the target stopping devices can be controlled to stop working, wherein after all the target stopping devices are determined, the target stopping devices can be controlled to stop working; the target stopping device can be determined and controlled to stop working, namely, one target stopping device can be determined, namely, the target stopping device is controlled to stop working.
For other charging equipment except the target stopping equipment, the charging equipment can be controlled to work according to the preset charging current, so that the sum of the stopping current corresponding to the target stopping equipment and the down-regulating current of other charging equipment reaches the target down-regulating current, and the load current of the target phase is reduced below the preset phase current.
In this embodiment, when the charging device is started, the charging device may be started according to the minimum charging current; the main charging piles can periodically detect and adjust the working current of each charging pile according to preset time (such as 20S); when the load current of the target phase is larger than the rated phase current, the load current of the target phase can be reduced to be lower than the rated phase current through the process, so that overload protection is realized; when the load current of the target phase is lower than the rated phase current in the later period, some charging devices can be restored (i.e. restarted), when the charging devices with long charging time or the charging devices with high priority are restored, if one device is still failed to restore for a preset number of times (for example, three times), the device can be not restored any more. In addition, the adjustable condition of the charged equipment (such as a vehicle) can be dynamically judged, if the actual charging current of the vehicle is 120% of the issued setting current, the vehicle can be considered as not adjustable, and for the non-adjustable vehicle, the minimum charging current of the corresponding charging equipment can be updated to the rated charging current.
According to the technical scheme provided by the embodiment of the application, the load current of the target phase is obtained, and under the condition that the load current of the target phase is larger than the preset phase current, the target down-regulating current of the target phase is determined according to the preset phase current and the load current; and determining the working current of each charging device according to the difference current between the target down-regulating current and the device down-regulating current. Therefore, when the load current of any phase is higher, the load current of the phase can be timely reduced, so that overload protection can be timely realized, and the reliability of the overload protection is improved. In addition, in the scheme, the target stopping device is determined based on the priority of the charging device, wherein the priority of the charging device is determined according to the charging mode and/or the charging time length of the charging device, and therefore the determined target stopping device is more suitable, and therefore user expectations can be met. Meanwhile, in the scheme, under the condition that the load current of the target phase is lower than the preset phase current and the suspended target shutdown device exists, at least one target shutdown device can be controlled to resume charging, so that the charging device can be flexibly started and stopped, meanwhile, the control strategy under the overload condition can be enriched, and further the user experience can be improved.
Fig. 3 is a schematic flow chart of another current adjustment method according to an embodiment of the present application, as shown in fig. 3, a specific process may include the following steps:
first step, a rated phase current I is obtained s Load current I of the target phase.
Specifically, rated phase current I s The load current I of the target phase can be obtained through a power grid side metering device in a power grid system, and can also be obtained by charging equipment.
Second, a target down-current of the target phase is calculated.
Specifically, the target down-regulating current Δi of the target phase may be determined by the following formula (1):
ΔI＝I-I s (1)
wherein I represents the load current of the target phase, I S Indicating the rated phase current. Alternatively, the rated phase current may be set to the fuse rated current, which may be fixed or user-set.
And thirdly, calculating the down-adjustable current of each charging device on the target phase.
Specifically, the downregulated current I of each charging device down_i Can be determined by the following formula (2):
I down_i ＝I d -I min (2)
wherein I is d Indicating the current of the charging device, I min Representing the minimum charging current of the charging device. Optionally, the minimum charging current of the charging device may be set by a merchant before the charging device leaves the factory, or may provide a range for the user, where a certain value selected by the user is at most 6A and at least 0A.
Fourth, the device calculating the target phase may down-regulate the current.
In particular, the device of the target phase may down-regulate the current I down Can be determined by the following formula (3):
I down ＝I down_1 +I down_2 +......+I down_n (3)
that is, the device of the target phase may down-regulate the current as the sum of the down-regulated currents of the charging devices.
A fifth step of judging whether the absolute value of the target down-regulating current of the target phase is larger than the device-down-regulating current of the target phase, and executing a sixth step if the absolute value of the target down-regulating current of the target phase is larger than the device-down-regulating current of the target phase; the seventh step is performed if the absolute value of the target down-regulated current of the target phase is less than or equal to the device-down-regulated current of the target phase.
And sixthly, the working current of each charging device is adjusted downwards.
Specifically, the operating current Δi_i for each device down-regulation may be determined based on the absolute value |Δi| of the target down-regulation current and the down-regulation current for each charging device. Specifically, the following formula (4) may be used to determine the operating current Δi_i that needs to be adjusted down by each charging device:
Figure BDA0004022767470000131
Δi—i represents the operating current that the ith charging apparatus needs to down-regulate.
And seventh, calculating the differential current.
In particular, the differential current may be determined by an absolute value of a target down-current of the target phase and a device-down-current of the target phase. Specifically, the differential current can be determined by the following formula (5):
I stop ＝|ΔI|-I down (5)
Wherein I is stop Represents differential current, |ΔI| represents target down-regulated current, I down The device representing the target phase may down-regulate the current.
And eighth, traversing each charging device according to the order of the priority from low to high.
Ninth, suspending traversing charging equipment and updating I stop ＝I stop -I min 。
And a tenth step of judging whether the updated differential current is greater than 0A, and if the updated differential current is greater than 0A, executing an eighth step, and continuing to traverse the next charging equipment. If the updated differential current is less than or equal to 0A, an eleventh step is performed to control each charging device to charge according to the minimum charging current.
Those skilled in the art will appreciate that the above embodiments are exemplary and not intended to limit the present application. The order of execution of one or more of the above steps may be modified, if possible, or may be combined selectively to yield one or more other embodiments. Those skilled in the art can select any combination from the above steps according to the need, and all the steps do not depart from the spirit of the scheme of the present application.
Based on the same inventive concept, as an implementation of the above method, the embodiment of the present application provides a current adjusting device, where the embodiment of the device corresponds to the embodiment of the foregoing method, and for convenience of reading, the embodiment of the present application does not describe details of the embodiment of the foregoing method one by one, but it should be clear that the device in the embodiment can correspondingly implement all the details of the embodiment of the foregoing method.
Fig. 4 is a schematic structural diagram of a current adjusting device provided in an embodiment of the present application, and as shown in fig. 4, the device provided in the embodiment includes: an acquisition module 110 and a control module 120, wherein:
the acquisition module 110 is configured to acquire a load current of a target phase;
the control module 120 is configured to determine a target down-regulation current of the target phase according to the preset phase current and the load current when the load current of the target phase is greater than the preset phase current;
according to the target down-regulating current and the device down-regulating current of the target phase, adjusting the working current of each charging device; wherein the device-down-tunable current of the target phase is the sum of the down-tunable currents of the charging devices.
As an alternative implementation manner of the embodiment of the present application, the control module 120 is specifically configured to:
determining a target shutdown device from among the charging devices to which the target phase is connected according to a differential current between the target down-regulated current and the device down-regulated current and a priority of each charging device to which the target phase is connected, when the target down-regulated current is greater than the device down-regulated current of the target phase;
controlling the target stopping equipment to stop working, and controlling other charging equipment except the target stopping equipment to work according to the specified charging current; the priority of the charging equipment is determined according to the charging mode and/or the charging duration of the charging equipment;
And adjusting the working current of each charging device according to the target down-regulating current under the condition that the target down-regulating current is smaller than or equal to the device down-regulating current.
As an alternative implementation manner of the embodiment of the present application, the control module 120 is specifically configured to: and according to the target down-regulating current and the down-regulating current of each charging device, the working current of each charging device is down-regulated.
As an alternative implementation manner of the embodiment of the present application, the control module 120 is specifically configured to:
traversing each charging device in the order of low priority;
in each traversing operation, determining the traversed charging equipment as target charging equipment, and updating the differential current, wherein the updated differential current is the difference of the differential current before updating minus the preset charging current;
continuing traversing the next charging device if the differential current is greater than a preset value; and stopping traversing under the condition that the differential current is smaller than or equal to a preset value.
As an optional implementation manner of the embodiment of the present application, the power supply of the charging device includes a power grid power supply unit and a new energy power supply unit, and the charging mode of the charging device includes: a fast charging mode and an energy saving mode, in which the charging device can be powered by the new energy;
The priorities of the charging devices in different charging modes are different; the priority of the charging equipment in the fast charging mode is higher than that of the charging equipment in the energy-saving mode, and the priority of the target stopping equipment is not higher than that of other charging equipment;
and/or;
in the charging devices in the same charging mode, the priority of each charging device is gradually reduced according to the sequence of charging time from long to short; and the priority of the target shutdown device is not higher than that of other charging devices.
As an optional implementation manner of the embodiment of the present application, the energy saving mode includes: a first energy saving mode and a second energy saving mode, wherein in the first energy saving mode, the charging equipment can be continuously charged according to a preset charging current under the power supply of the power grid power supply unit; in the second energy-saving mode, the current acquired by the charging equipment from the power grid power supply unit is smaller than or equal to a preset maximum available power grid current, and the maximum available power grid current is smaller than the preset charging current;
the priority of the charging device in the first energy saving mode is greater than the priority of the charging device in the second energy saving mode.
As an alternative implementation of the embodiment of the present application, the control module 120 is further configured to:
and controlling at least one target stopping device to resume charging in the condition that the load current of the target phase is lower than the preset phase current and the paused target stopping device exists.
The current adjusting device provided in this embodiment may perform the above method embodiment, and its implementation principle is similar to that of the technical effect, and will not be described herein again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Based on the same inventive concept, the embodiment of the application also provides a charging device. Fig. 5 is a schematic structural diagram of a charging device provided in an embodiment of the present application, as shown in fig. 5, where the charging device provided in the embodiment includes: a memory 210 and a processor 220, the memory 210 for storing a computer program; the processor 220 is configured to perform the method described in the method embodiments above when the computer program is invoked.
The charging device provided in this embodiment may perform the above method embodiment, and its implementation principle is similar to that of the technical effect, and will not be described herein again.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method described in the above method embodiment.
The present application also provides a computer program product which, when run on a charging device, causes the charging device to execute the method described in the above method embodiments.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted across a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, hard Disk, or magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), or the like.
Those of ordinary skill in the art will appreciate that implementing all or part of the above-described method embodiments may be accomplished by a computer program to instruct related hardware, the program may be stored in a computer readable storage medium, and the program may include the above-described method embodiments when executed. And the aforementioned storage medium may include: ROM or random access memory RAM, magnetic or optical disk, etc.
The naming or numbering of the steps in the present application does not mean that the steps in the method flow must be executed according to the time/logic sequence indicated by the naming or numbering, and the execution sequence of the steps in the flow that are named or numbered may be changed according to the technical purpose to be achieved, so long as the same or similar technical effects can be achieved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other manners. For example, the apparatus/device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In the description of the present application, unless otherwise indicated, "/" means that the associated object is an "or" relationship, e.g., a/B may represent a or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural.
Also, in the description of the present application, unless otherwise indicated, "a plurality" means two or more than two. "at least one of the following" or similar expressions thereof, means any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.
As used in this specification and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A method of regulating current, comprising:
acquiring load current of a target phase;
determining a target down-regulating current of the target phase according to the preset phase current and the load current under the condition that the load current of the target phase is larger than the preset phase current;
according to the target down-regulating current and the device down-regulating current of the target phase, adjusting the working current of each charging device; wherein the device-down-tunable current of the target phase is the sum of the down-tunable currents of the charging devices.
2. The method of claim 1, wherein adjusting the operating current of each charging device based on the target down-regulated current and the device-down-regulated current of the target phase comprises:
Determining a target shutdown device from among the charging devices to which the target phase is connected according to a differential current between the target down-regulated current and the device down-regulated current and a priority of each charging device to which the target phase is connected, when the target down-regulated current is greater than the device down-regulated current of the target phase;
controlling the target stopping equipment to stop working, and controlling other charging equipment except the target stopping equipment to work according to the specified charging current; the priority of the charging equipment is determined according to the charging mode and/or the charging duration of the charging equipment;
and adjusting the working current of each charging device according to the target down-regulating current under the condition that the target down-regulating current is smaller than or equal to the device down-regulating current.
3. The method of claim 2, wherein said adjusting the operating current of each of said charging devices in accordance with said target down-regulating current comprises:
and according to the target down-regulating current and the down-regulating current of each charging device, the working current of each charging device is down-regulated.
4. The method of claim 2, wherein said determining a target shutdown device from each of said charging devices comprises:
Traversing each charging device in the order of low priority;
in each traversing operation, determining the traversed charging equipment as target charging equipment, and updating the differential current, wherein the updated differential current is the difference of the differential current before updating minus the preset charging current;
continuing traversing the next charging device if the differential current is greater than a preset value; and stopping traversing under the condition that the differential current is smaller than or equal to a preset value.
5. The method of claim 1, wherein the power supply of the charging device comprises a grid power supply unit and a new energy power supply unit, and wherein the charging mode of the charging device comprises: a fast charging mode and an energy saving mode, in which the charging device can be powered by the new energy;
the priorities of the charging devices in different charging modes are different; the priority of the charging equipment in the fast charging mode is higher than that of the charging equipment in the energy-saving mode, and the priority of the target stopping equipment is not higher than that of other charging equipment;
and/or the number of the groups of groups,
in the charging devices in the same charging mode, the priority of each charging device is gradually reduced according to the sequence of charging time from long to short; and the priority of the target shutdown device is not higher than that of other charging devices.
6. The method of claim 5, wherein the power saving mode comprises: a first energy saving mode and a second energy saving mode, wherein in the first energy saving mode, the charging equipment can be continuously charged according to the preset charging current under the power supply of the power grid power supply unit; in the second energy-saving mode, the current acquired by the charging equipment from the power grid power supply unit is smaller than or equal to a preset maximum available power grid current, and the maximum available power grid current is smaller than the preset charging current;
the priority of the charging device in the first energy saving mode is greater than the priority of the charging device in the second energy saving mode.
7. The method according to any one of claims 1-6, further comprising:
and controlling at least one target stopping device to resume charging in the condition that the load current of the target phase is lower than the preset phase current and the paused target stopping device exists.
8. A current regulating device, comprising: the device comprises an acquisition module and a control module, wherein:
the acquisition module is used for acquiring the load current of the target phase;
the control module is used for determining a target down-regulating current of the target phase according to the preset phase current and the load current under the condition that the load current of the target phase is larger than the preset phase current;
According to the target down-regulating current and the device down-regulating current of the target phase, adjusting the working current of each charging device; wherein the device-down-tunable current of the target phase is the sum of the down-tunable currents of the charging devices.
9. A charging apparatus, characterized by comprising: a memory and a processor, the memory for storing a computer program; the processor is configured to perform the method of any of claims 1-7 when the computer program is invoked.
10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1-7.
CN202211697290.0A 2022-12-28 2022-12-28 Current regulation method and device and charging equipment Pending CN116111675A (en)

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