CN115117953A - Bidirectional charger, power supply system, power supply management method and device - Google Patents
Bidirectional charger, power supply system, power supply management method and device Download PDFInfo
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- CN115117953A CN115117953A CN202111659673.4A CN202111659673A CN115117953A CN 115117953 A CN115117953 A CN 115117953A CN 202111659673 A CN202111659673 A CN 202111659673A CN 115117953 A CN115117953 A CN 115117953A
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- rechargeable battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a bidirectional charger, a power supply system, a power supply management method and device, electronic equipment and a storage medium. The bidirectional charger comprises a bidirectional converter and a controller; the controller is electrically connected with the bidirectional converter; the bidirectional converter is connected with the rechargeable battery, has a charging mode and a discharging mode, and charges the rechargeable battery when in the charging mode; when the charging device is in a discharging mode, the bidirectional converter releases electric energy stored by the rechargeable battery; the controller is used for controlling the bidirectional converter to switch between a charging mode and a discharging mode so as to charge or discharge the rechargeable battery. The bidirectional charger provided by the invention can be switched between the charging mode and the discharging mode, when in the charging mode, the bidirectional charger can charge the rechargeable battery, and when in the discharging mode, the bidirectional charger can release the electric energy of the rechargeable battery to supply power to a load, so that the stability and the reliability are high.
Description
Technical Field
The invention relates to a bidirectional charger, a power supply system, a power supply management method and device, electronic equipment and a storage medium.
Background
At present, important power loads such as hospitals, data centers and power dispatching management departments are all provided with emergency power supply sources, and when power failure of a power grid occurs, the emergency power supply sources are used for supplying power through internal circuit switching. The emergency standby power supply is additionally arranged, so that the equipment cost is increased, the state of the emergency standby power supply needs to be periodically overhauled and maintained, and the operation and maintenance cost is further increased. In addition, the battery in the emergency standby power supply is in a charged floating state for a long time, and potential safety hazards of a circuit exist.
Disclosure of Invention
The invention provides a bidirectional charger, a power supply system, a power supply management method and device, electronic equipment and a storage medium, aiming at overcoming the defects of high cost and potential safety hazards of a circuit in the manner of adopting an emergency standby power supply as a load for uninterrupted power supply in the prior art.
The invention solves the technical problems through the following technical scheme:
in a first aspect, a charger is provided, which includes a bidirectional converter and a controller; the controller is electrically connected with the bidirectional converter; the bidirectional converter is connected with a rechargeable battery, wherein,
the bidirectional converter is provided with a charging mode and a discharging mode, and when the bidirectional converter is in the charging mode, the bidirectional converter charges the rechargeable battery; when the charging device is in the discharging mode, the bidirectional converter releases electric energy stored by the rechargeable battery;
the controller is used for controlling the bidirectional converter to switch between the charging mode and the discharging mode so as to charge or discharge the rechargeable battery.
According to the scheme, the bidirectional charger can be switched between the charging mode and the discharging mode, when the bidirectional charger is in the charging mode, the bidirectional charger can charge the rechargeable battery, and when the bidirectional charger is in the discharging mode, the bidirectional charger can release electric energy of the rechargeable battery to supply power to a load, so that power can be supplied to a power load, and the stability and the reliability are high.
Optionally, the bidirectional converter comprises a rectifying circuit and an inverter circuit, one end of the rectifying circuit is connected with the rechargeable battery, and the other end of the rectifying circuit is electrically connected with one end of the inverter circuit; when the bidirectional converter is in a charging mode, the other end of the inverter circuit is used as an input end of the bidirectional converter; when the bidirectional converter is in a discharging mode, the other end of the inverter circuit is used as the output end of the bidirectional converter.
In the scheme, the bidirectional converter is realized through the rectifying circuit and the inverter circuit, and stable and reliable electric energy can be provided for the load.
Optionally, the bidirectional converter further comprises:
the first filter circuit is connected to the other end of the inverter circuit;
and/or one end of the rectifying circuit is connected with the rechargeable battery through the second filter circuit;
and/or, a battery protection device, wherein one end of the rectification circuit is connected with the rechargeable battery through the battery protection device;
and/or the other end of the rectifying circuit is electrically connected with one end of the inverter circuit through the soft starter;
and/or, a first static switch, wherein one end of the rectifying circuit is connected with the rechargeable battery through the first static switch;
and/or the second static switch is connected to the other end of the inverter circuit.
In this scheme, can play protection circuit, load, provide the effect of stabilizing the electric energy.
In a second aspect, a power supply system is provided, which includes an energy storage power source and a load, where the load includes a power grid and/or a power utilization device, the energy storage power source includes a rechargeable battery and the bidirectional charger described above, and the bidirectional charger is electrically connected to the load and the rechargeable battery respectively.
In the scheme, the power supply system is used as an emergency standby power supply of the power grid and the electric equipment, and can supply power to the power grid and the electric equipment when the power grid is interrupted, so that the power can not be lost within a certain period. Or, in the peak period of power consumption of the power grid, when the power grid is overloaded, the power supply system can transmit electric energy to the power grid to relieve the overload pressure of the power grid, and the peak period of power consumption can be effectively coped with.
Optionally, the energy storage power supply is configured to be arranged in a battery charging station of an electric vehicle.
In the scheme, when the power grid normally supplies power, the energy storage power supply can provide charging and battery replacement services for the electric automobile; when the power grid is interrupted or the power grid is overloaded, the energy storage power supply supplies power to the load. The utilization rate of the energy storage power supply in the power conversion station is improved, the power conversion station can be used as an emergency power supply of a power grid or power utilization equipment and the like, the power utilization equipment does not need an additional emergency power supply, a large amount of cost can be saved, and the power utilization peak pressure of the power grid can be effectively relieved by the power conversion station.
Optionally, the power supply system further includes a switch assembly, and the bidirectional charger is connected to the load through the switch assembly.
In this scheme, the switch module can carry out seamless switching when confirming the electric wire netting and interrupting the power supply, perhaps sends and reminds in order to indicate the fortune dimension personnel to carry out the switch and switch, switches into from being connected with the inlet wire power supply with the two-way charger and is connected with the load to in time supply power for the load, avoid because of the equipment damage, the data loss that the load power failure arouses.
In a third aspect, a power management method is provided, including:
controlling a bidirectional charger to charge a rechargeable battery so that the rechargeable battery can be mounted on an electric automobile to supply power to the electric automobile when a battery replacement request is received;
and when a load power supply request is received, controlling the bidirectional charger to release the electric energy stored by the rechargeable battery to supply power to the load.
In the scheme, when the power supply is interrupted or the power grid is overloaded, the power supply system provided by the embodiment of the invention can be used for supplying power to the power grid and the power utilization equipment, so that the power loss of the power grid and the power utilization peak pressure of the power grid can be avoided within a certain period of time. The electric equipment does not need to be additionally provided with an emergency power supply, so that a large amount of cost can be saved, and the electric equipment can also effectively cope with power consumption peaks.
Optionally, the controlling the bidirectional charger to charge the rechargeable battery includes:
and detecting the residual electric quantity of the rechargeable battery, and controlling the bidirectional charger to charge the rechargeable battery when the residual electric quantity of the rechargeable battery is smaller than an electric quantity threshold value.
In the scheme, the charging is carried out when the residual electric quantity of the rechargeable battery is smaller than the electric quantity threshold value, so that the rechargeable battery is ensured to have certain electric quantity all the time and can supply power to the load when receiving the power supply request.
Optionally, controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to a load includes:
acquiring power demand parameters of the load;
and releasing the electric energy stored in the rechargeable battery according to the power consumption demand parameters to supply power to the load.
In the scheme, the electric energy is provided as required, the load is protected, and the load is prevented from being damaged by overlarge voltage and current.
Optionally, the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load includes:
performing authority verification on the load according to the load power supply request;
and when the authority verification is passed, controlling the bidirectional charger to release the electric energy stored by the rechargeable battery to supply power to the load.
In the scheme, only the loads with authority are supplied with power, and the condition that the loads are randomly accessed to cause disorder is avoided.
Optionally, controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to a load includes:
judging whether the power supply requirement of the load is greater than the power supply capacity of the rechargeable battery;
if the judgment result is negative, controlling the bidirectional charger to supply power to all the electric equipment contained in the load;
if so, controlling the bidirectional charger to supply power to partial electric equipment contained in the load, wherein the total power supply requirement of the partial electric equipment is not greater than the power supply capacity of the rechargeable battery; or, after the output voltage and/or the frequency of the bidirectional charger are reduced, all or part of the electric equipment contained in the load is supplied with power.
Optionally, the step of controlling the bidirectional charger to supply power to part of the electric devices included in the load includes:
acquiring power supply priority of each piece of electric equipment contained in the load;
and determining the electric equipment with the power supply priority ranked at the top as the partial electric equipment.
In the scheme, when the power supply capacity of the rechargeable battery is not enough to supply power to all the electric equipment, the important load is preferentially supplied with power, and the normal operation of the important load is ensured. The priority of the electric equipment can be set according to the actual situation.
Optionally, the step of controlling the bidirectional charger to charge the rechargeable battery includes:
controlling the switch switching of a switch assembly to enable a bidirectional charger to be connected with an incoming line power supply, controlling the bidirectional charger to be switched to a charging mode, and storing electric energy of the incoming line power supply in the rechargeable battery;
the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load comprises the following steps:
and controlling the switch switching of the switch assembly to enable the bidirectional charger to be connected with the load, controlling the bidirectional charger to be switched to a discharging mode, and releasing the electric energy stored by the rechargeable battery to supply power to the load.
In this scheme, through the switch module, can realize seamless switching, avoid because of the equipment damage, the data loss that the load power failure arouses.
In a fourth aspect, a power management device is provided, comprising:
the first control module is used for controlling the bidirectional charger to store electric energy of an incoming line power supply in a rechargeable battery by the control module, so that the rechargeable battery can supply power to the electric automobile after receiving a battery replacement request;
and the second control module is used for controlling the bidirectional charger to release the electric energy stored by the rechargeable battery to supply power to the load under the condition of receiving a load power supply request.
In the scheme, when the power supply of the power grid is interrupted, the power supply system provided by the embodiment of the invention can be used for supplying power to the power grid and the power utilization equipment, so that the power loss of the power grid and the power utilization peak pressure of the power grid can be avoided within a certain period of time or relieved. The electric equipment does not need to be additionally provided with an emergency power supply, so that a large amount of cost can be saved, and the peak power consumption pressure of the power grid can be effectively relieved.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the bidirectional charger provided by the invention can be switched between a charging mode and a discharging mode, when in the charging mode, the bidirectional charger can charge the rechargeable battery, and when in the discharging mode, the bidirectional charger can release the electric energy of the rechargeable battery to supply power to a load, so that the bidirectional charger can supply power to an electric load, and is high in stability and reliability.
Drawings
Fig. 1 is a block schematic diagram of a bidirectional charger according to an exemplary embodiment of the present invention;
fig. 2 is a circuit diagram of a bidirectional charger according to an exemplary embodiment of the present invention;
FIG. 3 is a block diagram of a power supply system according to an exemplary embodiment of the present invention;
FIG. 4 is a flowchart of a power management method according to an exemplary embodiment of the present invention;
FIG. 5 is a block diagram of a power management device according to an exemplary embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an exemplary embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Fig. 1 is a schematic block diagram of a bidirectional charger according to an exemplary embodiment of the present invention, where the bidirectional charger 1 includes a bidirectional converter 11 and a controller 12. The controller 12 is electrically connected to the bidirectional converter 11. The bidirectional converter 11 has a charging mode and a discharging mode, and the controller 12 is configured to control the bidirectional converter 11 to switch between the charging mode and the discharging mode to charge or discharge the rechargeable battery 2 connected to the bidirectional converter 11.
In the embodiment of the invention, the bidirectional charger can be switched between the charging mode and the discharging mode, when the bidirectional charger is in the charging mode, the bidirectional charger can charge the rechargeable battery, and when the bidirectional charger is in the discharging mode, the bidirectional charger can release the electric energy of the rechargeable battery to supply power to the load, so that the power can be supplied to the electric load, and the stability and the reliability are high.
When the bidirectional converter 11 is in the charging mode, the bidirectional converter 11 charges the rechargeable battery, and specifically, the bidirectional converter 11 stores the electric energy of the incoming line power supply 5 connected thereto in the rechargeable battery, so as to charge the rechargeable battery. The incoming power source 5 may include, but is not limited to, a power grid (providing utility power), a microgrid.
When the bidirectional converter 11 is in the discharging mode, the bidirectional converter 11 is switched to be connected with the load 3, and releases the electric energy stored in the rechargeable battery to supply power to the load 3. The electric energy released by the rechargeable battery can charge the electric vehicle and can also supply energy to other loads. Other loads may be electric devices in various living and production places, for example, but not limited to, electric devices including medical devices in hospitals, various scheduling devices, data storage devices, and the like, and power grids.
The mode switching of the bidirectional converter 11 can be manually triggered, namely, the mode switching is manually triggered when in need; the mode switching of the bidirectional converter 11 may also be automatically triggered according to the power supply state of the incoming line power supply 5, for example, when it is determined that the incoming line power supply 5 interrupts power supply, the controller 12 controls the bidirectional converter 11 to be in the discharging mode; when the incoming line power supply 5 supplies power normally, the controller 12 controls the bidirectional converter 11 to be in the charging mode.
In one embodiment, referring to fig. 2, the bidirectional converter 11 includes a rectifying circuit 111 and an inverter circuit 112, one end of the rectifying circuit 111 is connected to the rechargeable battery 2, and the other end of the rectifying circuit 111 is electrically connected to one end of the inverter circuit 112.
The controller switches the mode of the bidirectional converter 11 to the charging mode by controlling PWM (Pulse Width Modulation) of each switching device in the rectification circuit 111 and the inverter circuit 112. When the bidirectional converter is in the charging mode, the other end (end A, B, C, N) of the inverter circuit 112 is connected to the incoming line power supply 5 as the input end of the bidirectional converter 11, one end of the rectifier circuit 111 is used as the output end of the bidirectional converter 11, and the rectifier circuit 111 and the inverter circuit 112 store the electric energy of the incoming line power supply 5 in the rechargeable battery.
The controller switches the mode of the bidirectional converter 11 to the discharge mode by controlling the PWM of each switching device in the rectification circuit 111 and the inverter circuit 112. When the bidirectional converter is in the discharging mode, the other end (A, B, C, N end) of the inverter circuit 112 is connected to the load as the output end of the bidirectional converter 11, one end of the rectifier circuit 111 is connected to the input end of the bidirectional converter 11, and the rectifier circuit 111 and the inverter circuit 112 release the electric energy stored in the rechargeable battery to supply power to the load.
In one embodiment, the controller may further adjust the voltage/current output by the PWM controlled inverter circuit to meet the power supply requirements of different loads.
In one embodiment, the bidirectional converter further comprises: the first filter circuit 113. The first filter circuit 113 is connected to the other end of the inverter circuit 112. When the bidirectional converter is in the charging mode, the other end of the inverter circuit 112 is connected to the incoming line power supply 5 through the first filter circuit 113, and when the bidirectional converter is in the discharging mode, the other end of the inverter circuit 112 is connected to the load through the first filter circuit 113. The first filter circuit 113 can improve the anti-interference performance of the bidirectional converter and output stable electric energy. The first filter circuit 113 is not limited to be implemented by an LC filter circuit in the drawing, and may be implemented by a capacitive filter circuit, an inductive filter circuit, and an RC filter circuit.
In one embodiment, the bidirectional converter further comprises: a second filter circuit 114. One end of the rectifying circuit 111 is connected to the rechargeable battery 2 through a second filter circuit 114. The second filter circuit 114 can improve the anti-interference performance of the bidirectional converter and output stable electric energy. The second filter circuit 114 is not limited to be implemented by an inductive filter circuit in the drawing, and may be implemented by a capacitive filter circuit, an LC filter circuit, and an RC filter circuit.
In one embodiment, the bidirectional converter further comprises: a battery protection device 115. One end of the rectifying circuit 111 is connected to the rechargeable battery 2 through a battery protection device 115. The battery protection device 115 can protect each component of the bidirectional converter.
In one embodiment, the bidirectional converter further comprises: the first static switch 116, through which the bidirectional converter is connected to the rechargeable battery. When inlet wire power supply 5 is unusual, for example when the voltage is unstable, first static switch can break off rechargeable battery and bidirectional converter's being connected, avoids causing the damage to rechargeable battery because of inlet wire power supply 5 is unusual.
In one embodiment, the bidirectional converter further comprises: and a second static switch 117 connected to the other end of the inverter circuit. When the bidirectional converter is in the charging mode, the other end of the inverter circuit 112 is connected to the incoming line power supply 5 through the second static switch. When the incoming line power supply 5 is abnormal, for example, when the voltage is unstable, the second static switch 117 can disconnect the bidirectional converter from the incoming line power supply 5, so as to avoid damage to components and rechargeable batteries of the bidirectional converter due to the abnormal incoming line power supply 5. When the bidirectional converter is in the discharging mode, the other end of the inverter circuit 112 is connected to the load through the second static switch 117. When the load has faults such as short circuit and the like, the second static switch can disconnect the bidirectional converter from the load, and the damage to components and rechargeable batteries of the bidirectional converter due to the load faults is avoided.
In one embodiment, the bidirectional converter further comprises: the other end of the rectifying circuit is electrically connected with one end of the inverter circuit through the soft starter, and the soft starter can ensure that the bidirectional converter realizes smooth starting, reduce starting current, avoid starting overcurrent tripping and damage components.
In one embodiment, the bidirectional converter further comprises a voltage source E/2 connected in parallel between the rectification circuit 111 and the inversion circuit 112 to protect the bus voltage.
The power supply system comprises an energy storage power supply and a load, the load comprises a power grid and/or power utilization equipment, the energy storage power supply comprises a rechargeable battery and the bidirectional charger provided by any one of the embodiments, and the bidirectional charger is electrically connected with the load and the rechargeable battery respectively.
Wherein, the rechargeable battery is a battery with larger capacity. The number of the bidirectional chargers in the system can be one or multiple, and multiple bidirectional chargers independently supply power to the load. The number of the bidirectional chargers is not particularly limited in the embodiment of the present invention.
The grid can be used both as an incoming power supply 5 and as a load. When the power grid normally operates, namely, the power grid can normally supply power, the power grid is used as the incoming line power supply 5 of the power supply system, and the bidirectional charger stores electric energy of the incoming line power supply 5 in the rechargeable battery. When the power grid fails (namely, the power supply is interrupted) or the power grid is overloaded, the power grid can be used as a load of a power supply system, and the bidirectional charger releases the electric energy stored by the rechargeable battery to the power grid; or the bidirectional charger releases the electric energy stored by the rechargeable battery and directly supplies power to the electric equipment.
It can be understood that, when the bidirectional charger supplies power to the power grid, if the voltage output by the inverter circuit does not meet the power supply requirement of the power grid, the inverter circuit can be connected with the power grid through the transformer, and the voltage output by the inverter circuit is boosted to the target amplitude value through the transformer and then is supplied to the power grid.
Therefore, when the power supply is interrupted or the power grid is overloaded, the power supply system provided by the embodiment of the invention can be used for supplying power to the power grid and the electric equipment, so that the power loss of the power grid and the electric equipment can be avoided within a certain period or the peak pressure of the power consumption of the power grid can be relieved. The electric equipment does not need to be additionally provided with an emergency power supply, so that a large amount of cost can be saved, and the peak power consumption pressure of the power grid can be effectively relieved.
In one embodiment, the energy storage power supply is configured to be provided in a charging station of an electric vehicle. When the power grid normally supplies power, the energy storage power supply can provide charging and battery replacement services for the electric automobile; when the power supply is interrupted or the power supply is overloaded, the energy storage power supply supplies power to the load. The load is a load which has agreement with the power conversion station and has authority, and comprises at least one of a power grid, electric equipment outside the power conversion station and electric equipment inside the power conversion station. In this implementation, trade the power station and can be used as the urgent power supply of preparing for electricity of electric wire netting or consumer etc. and the consumer need not to equip in addition urgent power supply of preparing for electricity, can save a large amount of costs, and trade the power station and can effectively alleviate the power consumption peak pressure of electric wire netting.
In one embodiment, referring to fig. 3, the power supply system further includes a switch group 4, and the bidirectional charger is connected with the incoming power supply 5 or the load through the switch group 4. When the power grid normally supplies power, the bidirectional charger is connected with the incoming line power supply 5 through the switch assembly; when the power grid is interrupted or the power grid is overloaded, the switch component switches the switch, so that the bidirectional charger is connected with the load. The load is a load which has agreement with the power conversion station and has authority.
The switch component 4 can perform seamless switching when determining that the power grid is interrupted in power supply, or send out a prompt to prompt operation and maintenance personnel to perform switch switching, and the bidirectional charger is switched from being connected with the incoming line power supply 5 to being connected with a load so as to supply power to the load in time, thereby avoiding equipment damage and data loss caused by power failure of the load.
Fig. 4 is a flowchart of a power management method according to an exemplary embodiment of the present invention, where the power management method includes the following steps:
The hardware circuit of the bidirectional charger is described in any of the above embodiments, and is not described herein again.
In one embodiment, referring to fig. 3, the step of controlling the bidirectional charger to charge the rechargeable battery includes: and the switch of the switch component is controlled to switch so that the bidirectional converter is connected with the incoming line power supply, and the bidirectional converter is controlled to switch to a charging mode, so that the electric energy of the incoming line power supply is stored in the rechargeable battery.
In one embodiment, the step of controlling the bidirectional charger to charge the rechargeable battery comprises: and detecting the residual electric quantity of the rechargeable battery, and controlling the bidirectional charger to charge the rechargeable battery when the residual electric quantity of the rechargeable battery is smaller than an electric quantity threshold value. When the residual electric quantity of the rechargeable battery is smaller than the electric quantity threshold value, the rechargeable battery is charged, and the rechargeable battery is ensured to have certain electric quantity all the time and can supply power to the load when receiving the load power supply request.
And 402, when a load power supply request is received, controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load.
In one embodiment, the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load comprises: acquiring power demand parameters of a load; and releasing the electric energy stored in the rechargeable battery according to the power demand parameters to supply power to the load. The electric energy is provided according to the requirement, the load is protected, and the load is prevented from being damaged by overlarge voltage and current. Wherein, the electricity demand parameters may include but are not limited to: power supply duration, power supply voltage, power supply current, power supply frequency, and the like.
In one embodiment, the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load comprises the following steps: carrying out authority verification on the load according to the load power supply request; and the permission verification is passed, and the bidirectional charger is controlled to release the electric energy stored by the rechargeable battery to supply power to the load. And only the load with authority is supplied with power, so that the load is prevented from being randomly accessed to cause disorder. The parameters for the rights verification include at least one of: the device identification of the load, the position of the load and the user information of the user to which the load belongs.
In one embodiment, the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load comprises: judging whether the power supply requirement of the load is greater than the power supply capacity of the rechargeable battery; if the judgment result is negative, the power supply capacity of the rechargeable battery is enough, and the bidirectional charger is controlled to supply power to all the electric equipment contained in the load; if the judgment result is yes, the power supply capacity of the rechargeable battery is not enough to supply power to all the electric equipment, the bidirectional charger is controlled to supply power to part of the electric equipment contained in the load, and the total power supply requirement of the part of the electric equipment is not greater than the power supply capacity of the rechargeable battery; or the output voltage and/or the frequency of the bidirectional charger are/is reduced to supply power to all or part of the electric equipment contained in the load. Wherein the power supply requirement may be characterized by, but is not limited to, the following parameters: voltage, power, current, duration of power supply, etc. The power supply capability may be characterized by, but is not limited to, the following parameters: residual capacity, output power, output current, output voltage, etc.
In one embodiment, the step of controlling the bidirectional charger to supply power to part of the electric equipment contained in the load comprises: acquiring power supply priority of each electric device contained in a load; and determining the electric equipment with the power supply priority ranked at the top as partial electric equipment. When the power supply capacity of the rechargeable battery is insufficient to supply power to all the electric equipment, the important load is preferentially supplied with power, and the important load can be ensured to normally operate. The priority of the electric equipment can be set according to the actual situation.
In one embodiment, referring to fig. 3, the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load includes: and controlling the switch switching of the switch assembly to connect the bidirectional converter with the load, controlling the bidirectional converter to switch to a discharging mode, and releasing the electric energy stored by the rechargeable battery to supply power for the load.
In the embodiment of the invention, when the power grid is interrupted or overloaded, the bidirectional charger can release the electric energy stored by the rechargeable battery to supply power to the loads such as the power grid, the power utilization equipment and the like, so that the power loss or the peak pressure of power utilization of the power grid can be avoided within a certain period. The electric equipment does not need to be additionally provided with an emergency power supply, so that a large amount of cost can be saved, and the peak power consumption pressure of a power grid can be effectively relieved.
Corresponding to the embodiment of the power management method, the invention also provides an embodiment of a power management device.
Fig. 5 is a block diagram of a power management device according to an exemplary embodiment of the present invention, where the power management device includes:
the first control module 51 is used for controlling the bidirectional charger to store electric energy of an incoming line power supply in a rechargeable battery, so that the rechargeable battery can supply power to the electric automobile after receiving a battery replacement request;
and the second control module 52 is configured to control the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load when the load power supply request is received.
Optionally, the first control module 51 is configured to:
and detecting the residual electric quantity of the rechargeable battery, and controlling the bidirectional charger to charge the rechargeable battery when the residual electric quantity of the rechargeable battery is smaller than an electric quantity threshold value.
Optionally, the second control module 52 includes:
the acquiring unit is used for acquiring the power demand parameters of the load;
and the control unit is used for releasing the electric energy stored by the rechargeable battery according to the power consumption demand parameters to supply power to the load.
Optionally, the method further comprises:
and the verification module is used for performing authority verification on the load according to the load power supply request and calling the second control module when the authority verification is passed.
Optionally, the second control module comprises:
the judging unit is used for judging whether the power supply requirement of the load is greater than the power supply capacity of the rechargeable battery; if the judgment result is negative, calling a control unit to control the bidirectional charger to supply power to all the electric equipment contained in the load; if the judgment result is yes, calling a control unit to control the bidirectional charger to supply power to partial electric equipment contained in the load, wherein the total power supply requirement of the partial electric equipment is not greater than the power supply capacity of the rechargeable battery; or, after the output voltage and/or the frequency of the bidirectional charger are reduced, all or part of the electric equipment contained in the load is supplied with power.
Optionally, when the bidirectional charger is controlled to supply power to part of the electric devices included in the load, the control unit is configured to control the bidirectional charger to supply power to the part of the electric devices included in the load
Acquiring power supply priority of each piece of electric equipment contained in the load;
and determining the electric equipment with the power supply priority ranked at the top as the partial electric equipment.
Optionally, the first module is specifically configured to:
controlling the switch switching of a switch assembly to enable the bidirectional converter to be connected with an incoming line power supply, controlling the bidirectional converter to be switched to a charging mode, and storing the electric energy of the incoming line power supply in the rechargeable battery;
the second control module is used for
And controlling the switch switching of a switch assembly so as to connect the bidirectional converter with the load, controlling the bidirectional converter to be switched to a discharging mode, and releasing the electric energy stored by the rechargeable battery to supply power to the load.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the invention. One of ordinary skill in the art can understand and implement it without inventive effort.
Fig. 6 is a schematic diagram of an electronic device according to an exemplary embodiment of the present invention, and illustrates a block diagram of an exemplary electronic device 60 suitable for implementing embodiments of the present invention. The electronic device 60 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 6, the electronic device 60 may be embodied in the form of a general purpose computing device, which may be, for example, a server device. The components of the electronic device 60 may include, but are not limited to: the at least one processor 61, the at least one memory 62, and a bus 63 that couples various system components including the memory 62 and the processor 61.
The bus 63 includes a data bus, an address bus, and a control bus.
The memory 62 may include volatile memory, such as Random Access Memory (RAM)621 and/or cache memory 622, and may further include Read Only Memory (ROM) 623.
The memory 62 may also include a program tool 625 (or utility tool) having a set (at least one) of program modules 624, such program modules 624 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The processor 61 executes various functional applications and data processing, such as the methods provided by any of the above embodiments, by running a computer program stored in the memory 62.
The electronic device 60 may also communicate with one or more external devices 64 (e.g., keyboard, pointing device, etc.). Such communication may be through an input/output (I/O) interface 65. Also, the model-generating electronic device 60 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via a network adapter 66. As shown, network adapter 66 communicates with the other modules of model-generating electronic device 60 via bus 63. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating electronic device 60, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method provided in any of the above embodiments.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible implementation manner, the embodiment of the present invention may also be implemented in a form of a program product, which includes program code for causing a terminal device to execute a method implementing any of the above-mentioned embodiments when the program product runs on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may be executed entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device, partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (16)
1. The bidirectional charger is characterized by comprising a bidirectional converter and a controller; the controller is electrically connected with the bidirectional converter; the bidirectional converter is connected with a rechargeable battery, wherein,
the bidirectional converter is provided with a charging mode and a discharging mode, and when the bidirectional converter is in the charging mode, the bidirectional converter charges the rechargeable battery; when the charging device is in the discharging mode, the bidirectional converter releases electric energy stored by the rechargeable battery;
the controller is used for controlling the bidirectional converter to switch between the charging mode and the discharging mode so as to charge or discharge the rechargeable battery.
2. The bidirectional charger according to claim 1, wherein the bidirectional converter comprises a rectifying circuit and an inverter circuit, one end of the rectifying circuit is connected with the rechargeable battery, and the other end of the rectifying circuit is electrically connected with one end of the inverter circuit; when the bidirectional converter is in a charging mode, the other end of the inverter circuit is used as an input end of the bidirectional converter; when the bidirectional converter is in a discharging mode, the other end of the inverter circuit is used as the output end of the bidirectional converter.
3. The bidirectional charger according to claim 2, characterized in that said bidirectional converter further comprises:
the first filter circuit is connected to the other end of the inverter circuit;
and/or one end of the rectifying circuit is connected with the rechargeable battery through the second filter circuit;
and/or, a battery protection device, wherein one end of the rectification circuit is connected with the rechargeable battery through the battery protection device;
and/or the other end of the rectifying circuit is electrically connected with one end of the inverter circuit through the soft starter.
And/or, a first static switch, wherein one end of the rectifying circuit is connected with the rechargeable battery through the first static switch;
and/or the second static switch is connected to the other end of the inverter circuit.
4. A power supply system, characterized by comprising an energy storage power supply and a load, wherein the load comprises a power grid and/or electric equipment, the energy storage power supply comprises a rechargeable battery and the bidirectional charger of any one of claims 1-3, and the bidirectional charger is electrically connected with the load and the rechargeable battery respectively.
5. The power supply system of claim 4, wherein the energy storage power source is configured to be disposed within a charging station of an electric vehicle.
6. The bidirectional charger according to claim 4, characterized in that said power supply system further comprises a switch assembly, said bidirectional charger being connected to said load through said switch assembly.
7. A method of power management, comprising:
controlling a bidirectional charger to charge a rechargeable battery so that the rechargeable battery can be mounted on an electric automobile to supply power to the electric automobile when a battery replacement request is received;
and when a load power supply request is received, controlling the bidirectional charger to release the electric energy stored by the rechargeable battery to supply power to the load.
8. The power management method of claim 7, wherein controlling the bidirectional charger to charge the rechargeable battery comprises:
and detecting the residual electric quantity of the rechargeable battery, and controlling the bidirectional charger to charge the rechargeable battery when the residual electric quantity of the rechargeable battery is smaller than an electric quantity threshold value.
9. The power management method of claim 7, wherein controlling the bidirectional charger to release the stored energy of the rechargeable battery to supply power to a load comprises:
acquiring power demand parameters of the load;
and releasing the electric energy stored in the rechargeable battery according to the power consumption demand parameters to supply power to the load.
10. The power management method according to claim 7, wherein the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load comprises:
performing authority verification on the load according to the load power supply request;
and when the authority verification is passed, controlling the bidirectional charger to release the electric energy stored by the rechargeable battery to supply power to the load.
11. The power management method of claim 7, wherein controlling the bidirectional charger to release the stored energy of the rechargeable battery to supply power to a load comprises:
judging whether the power supply requirement of the load is greater than the power supply capacity of the rechargeable battery;
if the judgment result is negative, controlling the bidirectional charger to supply power to all the electric equipment contained in the load;
if so, controlling the bidirectional charger to supply power to partial electric equipment contained in the load, wherein the total power supply requirement of the partial electric equipment is not greater than the power supply capacity of the rechargeable battery; or after the output voltage and/or the frequency of the bidirectional charger are reduced, all or part of the electric equipment contained in the load is supplied with power.
12. The power management method according to claim 11, wherein the step of controlling the bidirectional charger to supply power to a part of the electric devices included in the load comprises:
acquiring power supply priority of each piece of electric equipment contained in the load;
and determining the electric equipment with the power supply priority ranked at the top as the partial electric equipment.
13. The power management method according to claim 7, wherein the step of controlling the bidirectional charger to charge the rechargeable battery comprises:
controlling the switch switching of a switch assembly to enable a bidirectional charger to be connected with an incoming line power supply, controlling the bidirectional charger to be switched to a charging mode, and storing electric energy of the incoming line power supply in the rechargeable battery;
the step of controlling the bidirectional charger to release the electric energy stored in the rechargeable battery to supply power to the load comprises the following steps:
and controlling the switch switching of the switch assembly to enable the bidirectional charger to be connected with the load, controlling the bidirectional charger to be switched to a discharging mode, and releasing the electric energy stored by the rechargeable battery to supply power to the load.
14. A power management device, comprising:
the first control module is used for controlling the bidirectional charger to store electric energy of an incoming line power supply in a rechargeable battery by the control module, so that the rechargeable battery can supply power to the electric automobile after receiving a battery replacement request;
and the second control module is used for controlling the bidirectional charger to release the electric energy stored by the rechargeable battery to supply power to the load under the condition of receiving a load power supply request.
15. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the power management method of any one of claims 7 to 13 when executing the computer program.
16. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the power management method according to any one of claims 7 to 13.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111659673.4A CN115117953A (en) | 2021-12-30 | 2021-12-30 | Bidirectional charger, power supply system, power supply management method and device |
| PCT/CN2022/142968 WO2023125709A1 (en) | 2021-12-30 | 2022-12-28 | Bidirectional charger, power supply system, and power management method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111659673.4A CN115117953A (en) | 2021-12-30 | 2021-12-30 | Bidirectional charger, power supply system, power supply management method and device |
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| CN115117953A true CN115117953A (en) | 2022-09-27 |
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| CN202111659673.4A Pending CN115117953A (en) | 2021-12-30 | 2021-12-30 | Bidirectional charger, power supply system, power supply management method and device |
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| CN (1) | CN115117953A (en) |
| WO (1) | WO2023125709A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125709A1 (en) * | 2021-12-30 | 2023-07-06 | 奥动新能源汽车科技有限公司 | Bidirectional charger, power supply system, and power management method and apparatus |
| WO2023125511A1 (en) * | 2021-12-30 | 2023-07-06 | 奥动新能源汽车科技有限公司 | Power supply management system, battery swapping station and power supply management method and apparatus therefor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7465143B2 (en) * | 2020-05-08 | 2024-04-10 | キヤノン株式会社 | Power receiving device, control method thereof, and program |
| CN212518469U (en) * | 2020-07-15 | 2021-02-09 | 博众精工科技股份有限公司 | Power supply system of charging and replacing power station |
| CN215343995U (en) * | 2021-06-15 | 2021-12-28 | 深圳拓邦股份有限公司 | Bidirectional DC-DC power supply charging and discharging system and battery charging and replacing equipment |
| CN115549224A (en) * | 2021-06-30 | 2022-12-30 | 佛山市顺德区美的电子科技有限公司 | Energy storage device, state switching method thereof and portable air conditioner |
| CN115133434A (en) * | 2021-12-30 | 2022-09-30 | 奥动新能源汽车科技有限公司 | Movable power equipment, power system and power dispatching method |
| CN115117953A (en) * | 2021-12-30 | 2022-09-27 | 奥动新能源汽车科技有限公司 | Bidirectional charger, power supply system, power supply management method and device |
-
2021
- 2021-12-30 CN CN202111659673.4A patent/CN115117953A/en active Pending
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2022
- 2022-12-28 WO PCT/CN2022/142968 patent/WO2023125709A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125709A1 (en) * | 2021-12-30 | 2023-07-06 | 奥动新能源汽车科技有限公司 | Bidirectional charger, power supply system, and power management method and apparatus |
| WO2023125511A1 (en) * | 2021-12-30 | 2023-07-06 | 奥动新能源汽车科技有限公司 | Power supply management system, battery swapping station and power supply management method and apparatus therefor |
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| WO2023125709A1 (en) | 2023-07-06 |
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