CN215378467U - Household energy storage power supply and distribution system - Google Patents

Household energy storage power supply and distribution system Download PDF

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Publication number
CN215378467U
CN215378467U CN202120601714.3U CN202120601714U CN215378467U CN 215378467 U CN215378467 U CN 215378467U CN 202120601714 U CN202120601714 U CN 202120601714U CN 215378467 U CN215378467 U CN 215378467U
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power
bidirectional converter
power supply
battery pack
controller
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熊天宇
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Blue Valley Smart Beijing Energy Technology Co Ltd
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Blue Valley Smart Beijing Energy Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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Abstract

The utility model discloses a household energy storage power supply and distribution system which comprises a bidirectional converter, a echelon battery pack, a vehicle-mounted charger, a battery management module and a controller, wherein the bidirectional converter is used for converting first alternating current provided by a power grid into first direct current and converting the first alternating current into second alternating current to supply power to household electrical appliances; the echelon battery pack is connected to the direct current end of the bidirectional converter, one end of the vehicle-mounted charger is connected with the echelon battery pack, and the vehicle-mounted charger is used for charging the power battery of the electric automobile according to the electric energy provided by the echelon battery pack; the battery management module is connected with the echelon battery pack and used for acquiring working parameters of the echelon battery pack; the controller is respectively connected with the bidirectional converter, the battery management module and the vehicle-mounted charger. The system not only can solve the power supply and distribution problem of automobile charging under the grid and off the grid, but also has compact structure.

Description

Household energy storage power supply and distribution system
Technical Field
The utility model relates to the technical field of household energy storage, in particular to a household energy storage power supply and distribution system.
Background
With the continuous development of household energy storage systems, multi-energy coordination control and household energy management are important research directions for the development of future smart power grids. At present, a household energy storage system is mainly used for storing electric energy of a power grid in a power grid electricity utilization valley period and releasing the electric energy in a power utilization peak period so as to reduce electricity utilization cost and reduce the burden of the power grid, but the charging problem of an electric automobile is not well considered.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the utility model aims to provide a household energy storage power supply and distribution system which can solve the power supply and distribution problem of charging of automobiles on the off-grid side and has a compact structure.
In order to achieve the above object, an embodiment of the present invention provides a home energy storage power supply and distribution system, including: the household appliance power supply system comprises a bidirectional converter, a first power supply and a second power supply, wherein a first alternating current end of the bidirectional converter is used for being connected to a power grid when the bidirectional converter is connected to the power grid, a second alternating current end of the bidirectional converter is connected to a household appliance, and the bidirectional converter is used for converting a first alternating current provided by the power grid into a first direct current and converting the first alternating current into a second alternating current to supply power to the household appliance; the echelon battery pack is connected to the direct current end of the bidirectional converter, and the echelon battery pack is charged according to the first direct current output by the bidirectional converter when the bidirectional converter is connected to the grid; the device comprises a vehicle-mounted charger, a battery pack, a charging connection device and a battery charger, wherein one end of the vehicle-mounted charger is connected with the battery pack in echelon, the other end of the vehicle-mounted charger is connected to a power battery of the electric automobile through the charging connection device, and the vehicle-mounted charger is used for charging the power battery of the electric automobile according to electric energy provided by the battery pack in echelon; the battery management module is connected with the echelon battery pack and used for acquiring working parameters of the echelon battery pack; the controller is respectively connected with the bidirectional converter, the battery management module and the vehicle-mounted charger, when receiving a charging request of the vehicle-mounted charger, the controller acquires working state information of the bidirectional converter and working parameters of the echelon battery pack, and when the bidirectional converter is controlled to stop working according to the working state information of the bidirectional converter and the working parameters of the echelon battery pack, the echelon battery pack is controlled by the controller to supply power to the vehicle-mounted charger.
According to the household energy storage power supply and distribution system provided by the embodiment of the utility model, a first alternating current end of a bidirectional converter is connected to a power grid when the bidirectional converter is connected to the household appliance, a second alternating current end of the bidirectional converter is connected to the household appliance, a first alternating current is converted into a second alternating current through the bidirectional converter to supply power to the household appliance, a echelon battery pack is connected to a direct current end of the bidirectional converter, the echelon battery pack is charged according to the first direct current output by the bidirectional converter when the bidirectional converter is connected to the household appliance, one end of a vehicle-mounted charger is connected with the echelon battery pack, the other end of the vehicle-mounted charger is connected to a power battery of an electric automobile through a charging connecting device, the vehicle-mounted charger charges the power battery of the electric automobile according to the electric energy provided by the echelon battery pack, a battery management module is connected with the echelon battery pack, the battery management module acquires the working parameters of the echelon battery pack, and a controller is respectively connected with the bidirectional converter, the echelon battery pack and the controller, The battery management module is connected with the vehicle-mounted charger, and controls the echelon battery pack to supply power to the vehicle-mounted charger through the controller when receiving a charging request of the vehicle-mounted charger and controlling the bidirectional converter to stop working according to the working state information of the bidirectional converter and the working parameters of the echelon battery pack. Therefore, the problem of power supply and distribution of charging of the automobile under the grid can be solved, and the structure is compact.
According to one embodiment of the utility model, the controller comprises a human-computer interaction module for displaying the working parameters of the echelon battery pack.
According to an embodiment of the utility model, the household energy storage and power supply and distribution system further includes a UPS storage battery, and the UPS storage battery supplies power to the battery management module and the controller through the first dc power supply and the second dc power supply respectively.
According to one embodiment of the utility model, the UPS storage battery is connected to the second alternating current end of the bidirectional converter, wherein the bidirectional converter also provides the output second alternating current to the UPS storage battery for charging when the bidirectional converter is connected to the grid.
According to one embodiment of the utility model, one end of the first direct current power supply is connected with the UPS storage battery, the other end of the first direct current power supply is connected with the battery management module, and the UPS storage battery is used for providing short-time energy for the first direct current power supply when the first direct current power supply is off-grid so that the first direct current power supply controls the battery management module to start and power up; one end of the second direct-current power supply is connected with the UPS storage battery, the other end of the second direct-current power supply is connected with the controller, and when the second direct-current power supply is off the network, the UPS storage battery is used for providing short-time energy for the second direct-current power supply so that the second direct-current power supply controls the controller to start to be powered on; the direct-current voltage output by the first direct-current power supply is smaller than the direct-current voltage output by the second direct-current power supply.
According to one embodiment of the utility model, the bidirectional converter converts direct current output by the echelon battery pack into second alternating current when the bidirectional converter is off-grid, and supplies power to household appliances.
According to an embodiment of the utility model, the household energy storage and power supply and distribution system further includes an interface converter, one end of the interface converter is connected to the output end of the second dc power supply, and the other end of the interface converter is connected to the controller, so that the controller communicates with the second dc power supply through the interface converter.
According to one embodiment of the utility model, the battery management module comprises a CAN communication interface, and the battery management module is connected with the controller through the CAN communication interface and sends the working parameters of the echelon battery pack to the controller.
According to one embodiment of the utility model, the bidirectional converter comprises a half-duplex communication interface, and the bidirectional converter is connected with the controller through the half-duplex communication interface so as to transmit the working state information to the controller.
According to one embodiment of the utility model, the controller controls the bidirectional converter to carry out rectification or inversion switching after receiving the grid-connected and off-grid switching signal.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
Fig. 1 is a schematic structural diagram of a household energy storage power supply and distribution system according to an embodiment of the utility model;
fig. 2 is a schematic structural diagram of a household energy storage and power supply and distribution system according to another embodiment of the utility model.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
The household energy storage and power supply and distribution system proposed by the embodiment of the utility model is described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a home energy storage power supply and distribution system according to an embodiment of the present invention, and referring to fig. 1, the home energy storage power supply and distribution system includes: the bidirectional converter 110, the echelon battery pack 130, the vehicle-mounted charger 140, the battery management module 150 and the controller 160.
The first alternating current end of the bidirectional converter 110 is used for being connected to the power grid 100 when the power grid is connected, the second alternating current end of the bidirectional converter 110 is connected to the household electrical appliance 120, and the bidirectional converter 110 is used for converting the first alternating current provided by the power grid 100 into a first direct current and converting the first alternating current into a second alternating current to supply power to the household electrical appliance 120; the echelon battery pack 130 is connected to the direct current end of the bidirectional converter 110, and the echelon battery pack 130 is charged according to the first direct current output by the bidirectional converter 110 when the bidirectional converter 110 is connected to the grid; one end of the vehicle-mounted charger 140 is connected with the echelon battery pack 130, the other end of the vehicle-mounted charger 140 is connected to the power battery 142 of the electric vehicle through the charging connection device 141, and the vehicle-mounted charger 140 is used for charging the power battery 142 of the electric vehicle according to the electric energy provided by the echelon battery pack 130; the battery management module 150 is connected with the echelon battery pack 130, and the battery management module 150 is used for collecting working parameters of the echelon battery pack 130; the controller 160 is respectively connected with the bidirectional converter 110, the battery management module 150 and the vehicle-mounted charger 140, when receiving a charging request from the vehicle-mounted charger 140, the controller 160 obtains the working state information of the bidirectional converter 110 and the working parameters of the echelon battery pack 130, and when the bidirectional converter 110 is controlled to stop working according to the working state information of the bidirectional converter 110 and the working parameters of the echelon battery pack 130, the echelon battery pack 130 is controlled by the controller 160 to supply power to the vehicle-mounted charger 140.
It should be noted that the operating state information of the bidirectional converter 110 may include operating voltage, operating current, whether there is a fault, and the like, and the controller 160 controls the bidirectional converter 110 to perform rectification or inversion switching after receiving the grid-connected and off-grid switching signal, that is, selects an internal circuit to perform rectification or inversion according to actual requirements, so as to meet power supply and distribution requirements, and the like; the operating parameters of the echelon battery pack 130 may include the total charge, operating voltage, operating current, and the presence or absence of a fault of the echelon battery pack 130, among others.
Specifically, as shown in fig. 1, when the bidirectional converter 110 is connected to the grid, and when power needs to be supplied to the household electrical appliance 120, the controller 160 may control a first conversion circuit (e.g., a conversion circuit composed of a rectification circuit and an inverter circuit) in the bidirectional converter 110 to operate, and convert the first ac power provided by the power grid 100 into a second ac power to supply power to the household electrical appliance 120.
When the battery bank 130 needs to be charged, the controller 160 may control a second conversion circuit (e.g., a conversion circuit formed by a bidirectional rectification circuit, which is operated in a rectification state) in the bidirectional converter 110 to convert the first ac power provided by the power grid 100 into a first dc power for charging the battery bank 130. Of course, in some cases, such as when the power consumption is high and the battery bank 130 is sufficiently charged, the controller 160 may control the second converting circuit in the bidirectional converter 110 (which is operated in the inverting state) to convert the dc power outputted from the battery bank 130 into ac power for the power grid 100.
When the power battery 142 of the electric vehicle needs to be charged, two ways may be included, one way is that it is determined that the energy of the echelon battery pack 130 is insufficient or currently in a power consumption valley according to the operating state information of the bidirectional converter 110 and the operating parameters of the echelon battery pack 130, at this time, the controller 160 may control the second conversion circuit in the bidirectional converter 110 to operate, convert the first ac power provided by the power grid 100 into the first dc power to be supplied to the vehicle-mounted charger 140, and the vehicle-mounted charger 140 charges the power battery 142 of the electric vehicle through the charging connection device 141, at this time, the power grid 100 may simultaneously charge the echelon battery pack 130 and the power battery 142. The other is that it is determined that the energy of the echelon battery pack 130 is sufficient or is currently in a peak power consumption according to the operating state information of the bidirectional converter 110 and the operating parameters of the echelon battery pack 130, at this time, the controller 160 may control the second conversion circuit in the bidirectional converter 110 to stop working, and control the echelon battery pack 130 to supply power to the vehicle-mounted charger 140, and the vehicle-mounted charger 140 charges the power battery 142 of the electric vehicle through the charging connection device 141. Therefore, the problem of charging of the power battery of the electric automobile during grid connection can be effectively solved.
When the bidirectional converter 110 is off-grid, that is, at this time, one or more of the household electrical appliance 120, the echelon battery pack 130 and the automobile power battery 142 cannot be supplied with electric energy through the power grid 100, but since the echelon battery pack 130 stores electric energy and is connected to the vehicle-mounted charger 140, the power battery 142 of the electric automobile can be charged through the echelon battery pack 130, when the power battery 142 of the electric automobile needs to be charged, the controller 160 may first obtain the operating parameters of the echelon battery pack 130 to determine whether the operating parameters meet the charging conditions, and if the charging conditions are met, if the electric quantity is sufficient and there is no fault, the controller is controlled to be in a discharging state to supply electric energy to the vehicle-mounted charger 140, and the vehicle-mounted charger 140 charges the power battery 142 of the electric automobile through the charging connection device 141. Therefore, the problem of charging the power battery of the electric automobile during off-grid can be effectively solved.
That is, when the bidirectional converter 110 is connected to the grid, the controller 160 may control the bidirectional converter 110 to operate to supply power to one or more of the household electrical appliance 120, the echelon battery pack 130 and the power battery 142 of the electric vehicle through the grid 100, or when the bidirectional converter 110 is connected to the grid, the controller 160 may control a part of circuits in the bidirectional converter 110 to operate to supply power to the household electrical appliance 120 through the grid 100, and simultaneously control the echelon battery pack 130 to supply power to the power battery 142 of the electric vehicle, specifically, the power may be supplied according to the usage state of the grid 100 and the energy of the echelon battery pack 130, for example, during a peak period of power consumption, only the household electrical appliance 120 may be supplied with power, and during a low valley period of power consumption, the echelon battery pack 130 and the power battery 142 of the electric vehicle may be supplied with power. When the bidirectional converter 110 is off-grid, the echelon battery pack 130 can provide electric energy for the power battery 142 of the electric vehicle to meet the charging requirement.
Therefore, the household energy storage power supply and distribution system can solve the problem of power supply and distribution of automobile charging under grid connection and disconnection, and is compact in structure and high in reliability.
In some embodiments of the present invention, the bidirectional converter 110 converts the dc power output from the echelon battery pack 130 to a second ac power when the battery is off-grid, and supplies the power to the household appliance 120.
Specifically, when the bidirectional converter 110 is off-grid, at this time, the electric energy cannot be provided to one or more of the household electrical appliance 120, the echelon battery pack 130 and the automobile power battery 142 through the power grid 100, but since the electric energy is stored in the echelon battery pack 130, the household electrical appliance 120 can be supplied with the electric energy through the echelon battery pack 130 to meet the demand of the electric energy. That is to say, when the bidirectional converter 110 is off-grid, not only the power battery 142 of the electric vehicle can be charged through the echelon battery pack 130 to solve the problem of vehicle charging, but also the household electrical appliance 120 can be supplied with power through the echelon battery pack 130 to solve the problem of household power consumption.
In some embodiments of the present invention, as shown in fig. 2, the above-mentioned household energy storage power supply and distribution system further includes a UPS storage battery 170, and the UPS storage battery 170 supplies power to the battery management module 150 and the controller 160 through a first dc power source 171 and a second dc power source 172, respectively. Optionally, the UPS battery 170 is connected to a second ac terminal of the bidirectional converter 110, wherein the bidirectional converter 110 further provides the output second ac power to the UPS battery 170 for charging when grid-connected.
Further, one end of the first dc power supply 171 is connected to the UPS storage battery 170, and the other end of the first dc power supply 171 is connected to the battery management module 150, and when the UPS storage battery 170 is off-grid, the first dc power supply 171 is used to provide short-time energy for the first dc power supply 171, so that the first dc power supply 171 controls the battery management module 150 to start power-up; one end of the second dc power source 171 is connected to the UPS battery 172, the other end of the second dc power source 172 is connected to the controller 160, and when the UPS battery 170 is off-grid, the UPS battery 172 is used to provide short-time energy to the second dc power source 172, so that the second dc power source 172 controls the controller 160 to start power-up; the dc voltage output by the first dc power source 171 is less than the dc voltage output by the second dc power source 172.
Specifically, as shown in fig. 2, when the bidirectional converter 110 is grid-connected, and the controller 160 controls the bidirectional converter 110 to operate to supply power to the household appliance 120, since the UPS battery 170 is connected to the second ac terminal of the bidirectional converter 110, the second ac power output from the bidirectional converter 110 is also supplied to the UPS battery 170 to charge the UPS battery 170. When the bidirectional converter 110 is off-grid, the UPS battery 170 provides short-time energy to the battery management module 150 through the first dc power source 171, so that the battery management module 150 can start power-up, and at the same time, provides short-time energy to the controller 160 through the second dc power source 172, so that the controller 160 can start power-up.
That is to say, when the bidirectional converter 110 is connected to the grid, the UPS battery 170 is charged while supplying power to the household electrical appliance 120, so as to ensure that the UPS battery 170 has sufficient power, so that when switching off the grid, a short-time energy can be provided to the battery management module 150 through the first dc power supply 171, it is ensured that the battery management module 150 can start to power on, meanwhile, a short-time energy can be provided to the controller 160 through the second dc power supply 172, it is ensured that the controller 160 can start to power on, thereby effectively avoiding the problem that when switching off the grid, because the controller 160 and the power management module 150 do not have a starting energy source during switching, the two cannot start to power on, and further the off-grid switching cannot be completed.
It should be noted that, when the bidirectional converter 110 is off-grid, the power battery 142 of the electric vehicle may be charged through the echelon battery pack 130 to solve the problem of vehicle charging, the household electrical appliance 120 may be powered through the echelon battery pack 130 to solve the problem of household power consumption, and the UPS battery 170 may be charged through the echelon battery pack 130 to ensure that the UPS battery 170 may always have sufficient power.
In some embodiments of the present invention, as shown in fig. 2, the household energy storage power supply and distribution system further includes an interface converter 180, one end of the interface converter 180 is connected to the output end of the second dc power source 172, and the other end of the interface converter 180 is connected to the controller 160, so that the controller 160 communicates with the second dc power source 172 through the interface converter 180, so that the controller 160 monitors the second dc power source 172 in real time.
In some embodiments of the present invention, the battery management module 150 includes a CAN communication interface (not shown), and the battery management module 150 is connected to the controller 160 through the CAN communication interface and transmits the operating parameters of the echelon battery pack 130 to the controller 160 through a CAN bus.
In some embodiments of the present invention, controller 160 includes a human-machine interaction module (not shown) for displaying operating parameters of echelon battery pack 130 so that it can be viewed by a user in real time.
In some embodiments of the present invention, the bidirectional converter 110 includes a half-duplex communication interface (not shown), and the bidirectional converter 110 is connected to the controller 160 through the half-duplex communication interface to transmit the operation state information to the controller 160. Further, the human-computer interaction module can also be used for operating parameters of the bidirectional converter 110, so that a user can conveniently view the operating parameters in real time.
According to the household energy storage power supply and distribution system provided by the embodiment of the utility model, the problems of grid-connected/off-grid power supply and automobile charging can be solved, the system is compact in structure, manual participation is not required, and the automation degree is high.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A home energy storage and supply distribution system, comprising:
the household appliance power supply system comprises a bidirectional converter, a first power supply and a second power supply, wherein a first alternating current end of the bidirectional converter is used for being connected to a power grid when the bidirectional converter is connected to the power grid, a second alternating current end of the bidirectional converter is connected to a household appliance, and the bidirectional converter is used for converting a first alternating current provided by the power grid into a first direct current and converting the first alternating current into a second alternating current to supply power to the household appliance;
the echelon battery pack is connected to the direct current end of the bidirectional converter, and the echelon battery pack is charged according to the first direct current output by the bidirectional converter when the bidirectional converter is connected to the grid;
one end of the vehicle-mounted charger is connected with the echelon battery pack, the other end of the vehicle-mounted charger is connected to a power battery of the electric automobile through a charging connecting device, and the vehicle-mounted charger is used for charging the power battery of the electric automobile according to electric energy provided by the echelon battery pack;
the battery management module is connected with the echelon battery pack and used for acquiring working parameters of the echelon battery pack;
the controller is respectively connected with the bidirectional converter, the battery management module and the vehicle-mounted charger, when receiving a charging request of the vehicle-mounted charger, the controller acquires working state information of the bidirectional converter and working parameters of the echelon battery pack, and controls the echelon battery pack to supply power to the vehicle-mounted charger through the controller when the bidirectional converter stops working according to the working state information of the bidirectional converter and the working parameters of the echelon battery pack.
2. A home energy storage and supply distribution system according to claim 1, wherein the controller comprises a human-machine interaction module for displaying operating parameters of the echelon battery pack.
3. A home energy storage and distribution system according to claim 1 and further comprising a UPS battery that supplies power to the battery management module and the controller via a first dc power source and a second dc power source, respectively.
4. A home energy storage and supply distribution system according to claim 3, wherein the UPS battery is connected to the second ac terminal of the bidirectional converter, wherein the bidirectional converter further provides the output second ac power to the UPS battery for charging when grid-connected.
5. A home energy storage and supply distribution system according to claim 3, wherein one end of the first dc power supply is connected to the UPS storage battery, and the other end of the first dc power supply is connected to the battery management module, and when the UPS storage battery is off-grid, the UPS storage battery is configured to provide short-time energy to the first dc power supply, so that the first dc power supply controls the battery management module to start power-up;
one end of the second direct-current power supply is connected with the UPS storage battery, the other end of the second direct-current power supply is connected with the controller, and when the UPS storage battery is off-grid, the UPS storage battery is used for providing short-time energy for the second direct-current power supply so that the second direct-current power supply can control the controller to start and power on;
the direct-current voltage output by the first direct-current power supply is smaller than the direct-current voltage output by the second direct-current power supply.
6. The system of claim 5, wherein the bidirectional converter converts the DC power output from the echelon battery pack to a second AC power when the bidirectional converter is off-grid, and supplies power to the household appliance.
7. A home energy storage and supply distribution system according to claim 6, further comprising an interface converter, wherein one end of the interface converter is connected to the output end of the second DC power supply, and the other end of the interface converter is connected to the controller, so that the controller communicates with the second DC power supply through the interface converter.
8. The home energy storage and power distribution system according to claim 1, wherein the battery management module comprises a CAN communication interface, and the battery management module is connected with the controller through the CAN communication interface and sends the operating parameters of the echelon battery pack to the controller.
9. The home energy storage power supply and distribution system of claim 8 wherein the bidirectional converter comprises a half-duplex communication interface, the bidirectional converter being connected to the controller via the half-duplex communication interface to transmit operating status information to the controller.
10. The home energy storage and supply power distribution system according to claim 9, wherein the controller controls the bidirectional converter to perform rectification or inversion switching after receiving the grid-connected and off-grid switching signal.
CN202120601714.3U 2021-03-24 2021-03-24 Household energy storage power supply and distribution system Active CN215378467U (en)

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