CN109638955B - Power supply circuit - Google Patents

Power supply circuit Download PDF

Info

Publication number
CN109638955B
CN109638955B CN201811611371.8A CN201811611371A CN109638955B CN 109638955 B CN109638955 B CN 109638955B CN 201811611371 A CN201811611371 A CN 201811611371A CN 109638955 B CN109638955 B CN 109638955B
Authority
CN
China
Prior art keywords
input end
switch
circuit
power supply
moving point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201811611371.8A
Other languages
Chinese (zh)
Other versions
CN109638955A (en
Inventor
汤尔漫
周眉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiuhe New Technology Shenzhen Co ltd
Original Assignee
Jiuhe New Technology Shenzhen Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiuhe New Technology Shenzhen Co ltd filed Critical Jiuhe New Technology Shenzhen Co ltd
Priority to CN201811611371.8A priority Critical patent/CN109638955B/en
Publication of CN109638955A publication Critical patent/CN109638955A/en
Application granted granted Critical
Publication of CN109638955B publication Critical patent/CN109638955B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to the technical field of power supply, and provides a power supply circuit. The power supply circuit comprises a standby battery module for providing a standby power supply; the mode switching circuit comprises a standby power supply mode and a non-standby power supply mode, is connected with the standby battery module and is used for switching the standby battery module to work in the standby power supply mode or the non-standby power supply mode; the path switching circuit comprises a first path mode and a second path mode, is connected with the mode switching circuit, and works in the first path mode to output the standby power supply when the mains supply is not input and the standby battery module works in the standby power supply mode; when the commercial power supply is input and the backup battery module works in the backup power supply mode, the path switching circuit works in the second path mode to output the commercial power supply and disconnect the output of the backup power supply. The invention realizes the switching between the commercial power supply and the standby power supply, and the commercial power supply has priority.

Description

Power supply circuit
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of power supply, in particular to a power supply circuit.
[ background of the invention ]
In order to solve the trouble of no electricity or frequent power failure of users in partial areas, at present, electric energy provided by solar energy and/or mains supply is stored through a standby battery module, and the basic electricity utilization requirements of partial people and families are met.
In the process of implementing the invention, the inventor finds that the following problems exist in the related art: the existing backup battery module and a mains supply belong to two different power supply networks, and particularly in an electricity shortage area, a mains supply and a backup power supply provide power supply input, wherein the power supply can be accessed (including normal input of the mains supply and power supply coming after power failure of the mains supply), the backup power supply can be accessed, the mains supply can be accessed and the backup power supply can not be accessed, the mains supply can not be accessed (for example, the mains supply is repaired after power failure, the mains supply is subjected to power failure in an emergency situation and the like), the backup power supply can be accessed, and the mains supply can not be accessed and the backup power supply can not be accessed. The current power supply scheme can not realize the switching of a mains supply and a standby power supply according to the actual situation, and can only supply power according to an independent power supply network which is connected under the condition that the mains supply and the standby power supply can be accessed, and can not preferentially use the mains supply to supply power.
[ summary of the invention ]
In order to solve the above technical problem, an embodiment of the present invention provides a power supply circuit, which can implement switching between a commercial power supply and a standby power supply, and preferentially switch to the commercial power supply to supply power when the commercial power supply is input.
In order to solve the above technical problems, embodiments of the present invention provide the following technical solutions:
an embodiment of the present invention provides a power supply circuit, including:
the standby battery module comprises a standby power supply mode and a non-standby power supply mode and is used for providing standby power supply;
the mode switching circuit is connected with the standby battery module and is used for switching the standby battery module to work in the standby power supply mode or the non-standby power supply mode;
the path switching circuit comprises a first path mode and a second path mode, is connected with the mode switching circuit, and works in the first path mode to output the standby power supply when a mains supply is not input and the standby battery module works in the standby power supply mode; when a mains supply is input and the backup battery module works in the backup power supply mode, the path switching circuit works in the second path mode to output the mains supply and disconnect the output of the backup power supply.
Optionally, the power supply circuit further comprises:
the trigger switch circuit comprises a trigger mode and a non-trigger mode, the trigger switch circuit is connected with the mode switching circuit, and the trigger switch circuit is used for working in the trigger mode in the standby power supply mode and working in the non-trigger mode in the non-standby power supply mode;
the backflow prevention switch circuit is connected with the trigger switch circuit and used for working in a disconnected state in the trigger mode and working in a connected state in the non-trigger mode;
the reverse-flow prevention switch circuit is respectively connected with the path switching circuit and the reverse-flow prevention switch circuit, and works in a conducting state and a disconnecting state under the standby power supply mode to output the standby power supply or the commercial power supply; and under the non-standby power supply mode, the reverse-flow prevention switch circuit works in a disconnected state, and the reverse-flow prevention switch circuit works in a connected state to output the commercial power supply.
Optionally, the backup battery module includes a battery pack, a solar charging management circuit, a commercial power charging management circuit, a charging logic selection circuit, and an inverter group;
the battery pack is used for storing electric quantity;
the solar charging management circuit is connected with the charging logic selection circuit, the commercial power charging management circuit, the battery pack, the inverter pack and the solar photovoltaic device and is used for realizing solar charging;
the commercial power charging management circuit is also connected with the charging logic selection circuit, the battery pack, the inverter group and the commercial power supply and is used for realizing commercial power charging;
the charging logic selection circuit is also connected with the solar photovoltaic device and is used for working in a disconnected state under the condition that the solar photovoltaic device inputs a power supply to realize solar charging, and working in a connected state under the condition that the solar photovoltaic device does not input the power supply to realize commercial power charging;
the inverter group is also connected with the battery pack and the mode switching circuit and is used for converting the direct current stored in the battery pack into alternating current.
Optionally, the backup battery module further includes an inverter switch, a solar charging switch, a mains charging switch, a solar charging indication circuit, and a mains charging indication circuit;
the inverter switch is positioned between the battery pack and the inverter pack;
the solar charging switch is connected with the solar charging management circuit, the commercial power charging switch, the battery pack and the inverter group and is used for gating the solar charging management circuit to charge the battery pack;
the commercial power charging switch is also connected with the commercial power charging management circuit, the battery pack and the inverter group and is used for gating the commercial power charging management circuit to charge the battery pack;
the solar charging indicating circuit is connected with the solar charging management circuit and is used for indicating whether the solar charging management circuit is in a working state or not;
the commercial power charging indicating circuit is connected with the commercial power charging management circuit and used for indicating whether the commercial power charging management circuit is in a working state or not.
Optionally, the inverter group includes a first inverter and a second inverter, the first inverter includes a first direct current positive input end, a first direct current negative input end, a first switch end, a first alternating current positive output end and a first alternating current negative output end, and the second inverter includes a second direct current positive input end, a second direct current negative input end, a second switch end, a second alternating current positive output end and a second alternating current negative output end;
the first dc positive input end is connected to the second dc positive input end, the inverter switch, the solar charging switch and the mains charging switch, and the first dc negative input end is connected to the second dc negative input end, the inverter switch, the solar charging management circuit and the mains charging management circuit;
the first switch end, the first alternating current positive output end and the first alternating current negative output end are respectively connected with the mode switching circuit, and the second switch end, the second alternating current positive output end and the second alternating current negative output end are respectively connected with the mode switching circuit.
Optionally, the mode switching circuit comprises a switch, a first diode and a second diode;
the change-over switch comprises a change-over switch moving point input end and a change-over switch fixed point output end, the change-over switch moving point input end is not connected with the change-over switch fixed point output end in an initial state, the change-over switch moving point input end comprises a first moving point input end, a second moving point input end, a third moving point input end, a fourth moving point input end, a fifth moving point input end and a sixth moving point input end, and the change-over switch fixed point output end comprises a first fixed point output end, a second fixed point output end and a third fixed point output end;
the first moving point input end is connected with the first switch end and the anode of the first diode, the second moving point input end is connected with the second switch end and the anode of the second diode, the third moving point input end is connected with a first alternating current positive output end, the fourth moving point input end is connected with a second alternating current positive output end, the fifth moving point input end is connected with a first alternating current negative output end, and the sixth moving point input end is connected with a second alternating current negative output end;
the first fixed point output end is connected with a direct current power supply, and the second fixed point output end and the third fixed point output end are respectively connected with the path switching circuit;
and the cathode of the first diode is connected with the cathode of the second diode and an operating power supply.
Optionally, the path switching circuit comprises a switching relay, a first light emitting diode, and a second light emitting diode;
the switching relay comprises a switching relay coil and a switching relay switch, the switching relay switch comprises a switching relay switch moving point input end and a switching relay switch fixed point output end, the switching relay switch moving point input end comprises a seventh moving point input end, an eighth moving point input end, a ninth moving point input end, a tenth moving point input end, an eleventh moving point input end and a twelfth moving point input end, and the switching relay switch fixed point output end comprises a fourth fixed point output end, a fifth fixed point output end and a sixth fixed point output end;
in an initial state, the seventh moving point input end is connected with the fourth fixed point output end, the eighth moving point input end is suspended, the ninth moving point input end is connected with the fifth fixed point output end, the tenth moving point input end is suspended, the eleventh moving point input end is connected with the sixth fixed point output end, and the twelfth moving point input end is suspended;
one end of the relay changing coil is connected with the twelfth moving point input end and the anode of the mains supply, and the other end of the relay changing coil is connected with the tenth moving point input end and the cathode of the mains supply;
the seventh moving point input end is connected with the anode of the first light-emitting diode, the eighth moving point input end is connected with the anode of the second light-emitting diode, the ninth moving point input end is connected with the second fixed point output end, the tenth moving point input end is connected with the cathode of the mains supply, the eleventh moving point input end is connected with the third fixed point output end, and the twelfth moving point input end is connected with the anode of the mains supply;
the fourth fixed point output end is connected with the working power supply, and the fifth fixed point output end and the sixth fixed point output end are respectively connected with the anti-reverse switch circuit;
and the cathode of the first light-emitting diode is connected with the cathode of the second light-emitting diode and the ground terminal.
Optionally, the trigger circuit comprises a trigger relay and a third light emitting diode;
the trigger relay comprises a trigger relay coil and a trigger relay switch, the trigger relay switch comprises a trigger relay switch moving point input end and a trigger relay switch fixed point output end, the trigger relay switch moving point input end comprises a thirteenth moving point input end and a fourteenth moving point input end, the trigger relay switch fixed point output end comprises a seventh fixed point output end, and the thirteenth moving point input end is connected with the seventh fixed point output end in an initial state;
one end of the trigger relay coil is connected with the working power supply, and the other end of the trigger relay coil is connected with the ground end;
the input end of the thirteenth moving point is connected with the backflow prevention switch circuit, the input end of the fourteenth moving point is connected with the anode of the third light emitting diode, and the output end of the seventh fixed point is connected with the cathode of the commercial power supply;
the cathode of the third light-emitting diode is connected with the anti-backflow switch circuit and the anode of the mains supply;
the backflow prevention switch circuit comprises a backflow prevention relay and a fourth light emitting diode;
the backflow-preventing relay comprises a backflow-preventing relay coil and a backflow-preventing relay switch, the backflow-preventing relay switch comprises a backflow-preventing relay switch moving point input end and a backflow-preventing relay switch fixed point output end, in an initial state, the backflow-preventing relay switch moving point input end is not connected with the backflow-preventing relay switch fixed point output end, the backflow-preventing relay switch moving point input end comprises a fifteenth moving point input end, a sixteenth moving point input end, a seventeenth moving point input end and an eighteenth moving point input end, and the backflow-preventing relay switch fixed point output end comprises an eighth fixed point output end, a ninth fixed point output end, a tenth fixed point output end and an eleventh fixed point output end;
one end of the anti-backflow relay coil is connected with the cathode of the third light-emitting diode and the anode of the mains supply, and the other end of the anti-backflow relay coil is connected with the input end of the thirteenth actuating point;
the fifteenth moving point input end is connected with the anti-reverse switch circuit and the positive electrode of the load, the sixteenth moving point input end is connected with the anti-reverse switch circuit and the negative electrode of the load, the seventeenth moving point input end is connected with the anode of the fourth light-emitting diode, and the eighteenth moving point input end is connected with the cathode of the fourth light-emitting diode;
the eighth fixed point output end is connected with the anode of the commercial power supply, the ninth fixed point output end is connected with the cathode of the commercial power supply, the tenth fixed point output end is connected with the ninth fixed point output end, and the eleventh fixed point output end is connected with the anode of the commercial power supply;
the anti-reverse switching circuit comprises an anti-reverse relay, the anti-reverse relay comprises an anti-reverse relay coil and an anti-reverse relay switch, the anti-reverse relay switch comprises an anti-reverse relay switch moving point input end and an anti-reverse relay switch fixed point output end, the anti-reverse relay switch moving point input end is not connected with the anti-reverse relay switch fixed point output end in an initial state, the anti-reverse relay switch moving point input end comprises a nineteenth moving point input end, a twentieth moving point input end, a twenty-first moving point input end and a twenty-second moving point input end, and the anti-reverse relay switch fixed point output end comprises a twelfth fixed point output end, a thirteenth fixed point output end, a fourteenth fixed point output end and a fifteenth fixed point output end;
one end of the anti-reverse relay coil is connected with the working power supply, and the other end of the anti-reverse relay coil is connected with the ground end;
the nineteenth moving point input end is connected with the fifteenth moving point input end and the positive pole of the load, the twentieth moving point input end is connected with the sixteenth moving point input end and the negative pole of the load, the twenty-first moving point input end is connected with the charging logic selection circuit, and the twenty-second moving point input end is suspended;
the twelfth fixed point output end is connected with the fifth fixed point output end, the thirteenth fixed point output end is connected with the sixth fixed point output end, the fourteenth fixed point output end is connected with the commercial power charging management circuit, and the fifteenth fixed point output end is suspended.
Optionally, the power supply circuit further includes a fault detection circuit, the fault detection circuit is connected to the mode switching circuit and the path switching circuit, and the fault detection circuit includes a fault detection relay and a fifth light emitting diode;
the fault detection relay comprises a fault detection relay coil and a fault detection relay switch, the fault detection relay switch comprises a fault detection relay switch fixed point input end and a fault detection relay switch moving point output end, the fault detection relay switch fixed point input end comprises a first fixed point input end, the fault detection relay switch moving point output end comprises a first moving point output end and a second moving point output end, and the first fixed point input end is connected with the first moving point output end in an initial state;
one end of the fault detection relay coil is connected with the second fixed point output end, and the other end of the fault detection relay coil is connected with the third fixed point output end;
the first fixed point input end is connected with the working power supply, the first moving point output end is connected with the anode of the fifth light-emitting diode, and the second moving point output end is suspended; and the cathode of the fifth light-emitting diode is connected with the ground end.
Optionally, the power supply circuit further includes a mains switch, a mains input indication circuit, and a load switch;
the mains supply switch is connected with the mains supply, the mains supply input indicating circuit, the path switching circuit and the backflow preventing switch circuit and is used for controlling the input of the mains supply;
the commercial power input indicating circuit is connected in parallel at two ends of the commercial power supply and is used for indicating the input state of the commercial power supply;
the load switch is connected with the load, the backflow prevention switch circuit and the reverse prevention switch circuit and used for controlling whether the standby power supply or the commercial power supply supplies power to the load or not.
The invention has the beneficial effects that: compared with the prior art, the embodiment of the invention provides a power supply circuit. The utility power supply and the standby power supply are integrated in the same power supply network system, the switching between the utility power supply and the standby power supply is realized through the mode switching circuit and the path switching circuit according to the mode of the standby power supply and the input condition of the utility power supply, and the utility power supply is preferentially switched to supply power to the utility power supply under the condition of the input of the utility power supply.
[ description of the drawings ]
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit connection diagram of a power supply circuit according to an embodiment of the present invention.
[ detailed description ] embodiments
To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
It should be noted that "PV" in fig. 1 refers to a solar power input terminal, "220V/AC" refers to a commercial power input terminal, and "OUT" refers to a load output terminal of the power supply circuit of the present application, which can be used to supply power to all electrical devices in a household internal power grid. "BT 1", "BT 2" and "BATTERY" IN fig. 2 refer to batteries, "PV IN" refers to solar power input terminal, "PV +" refers to solar power positive input terminal, "PV-" refers to solar power negative input terminal, "ACOUT" refers to load output terminal of the power supply circuit of the present application, and can be used for supplying power to all electrical devices IN the household internal power grid, and the output is alternating current. "IN 1" is connected to the second fixed point output b2 to indicate that the power supply circuit selects the first inverter to supply power, and "IN 2" is connected to the third fixed point output b3 to indicate that the power supply circuit selects the second inverter to supply power.
Fig. 1 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention. As shown in fig. 1, the power supply circuit 200 includes a backup battery module 10, a mode switching circuit 20, a path switching circuit 30, a trigger switch circuit 40, a backflow prevention switch circuit 50, a backflow prevention switch circuit 60, a fault detection circuit 70, a utility power switch 80, a utility power input indication circuit 90, and a load switch 100.
The backup battery module 10 includes a backup power mode and a non-backup power mode, and is used for providing a backup power, and includes a battery pack 101, a solar charging management circuit 102, a commercial power charging management circuit 103, a charging logic selection circuit 104, an inverter group 105, an inverter switch 106, a solar charging switch 107, a commercial power charging switch 108, a solar charging indication circuit 109, and a commercial power charging indication circuit 110.
The battery pack 101 is used for storing electric quantity, in this embodiment, the battery pack 101 adopts a plurality of groups of storage batteries connected in series, and the battery pack 101 is an independent and reliable power supply and can continuously transmit electric energy to a power supply grid after the interruption of a mains supply.
The solar charging management circuit 102 is connected to the charging logic selection circuit 104, the commercial power charging management circuit 103, the battery pack 101, the inverter pack 105, and the solar photovoltaic device, and is configured to implement solar charging. The input of the solar charging management circuit 102 is connected to a solar photovoltaic device (i.e. a solar power input end or a solar power generation input end), in some embodiments, the solar charging management circuit 102 includes a maximum power point tracking system and a master control system, and the master control system includes a processing unit, a power voltage stabilizing unit, a temperature detection circuit, and the like.
The commercial power charging management circuit 103 is further connected to the charging logic selection circuit 104, the battery pack 101, the inverter pack 105, and the commercial power supply, and is configured to charge commercial power. For example, when the commercial power charging management circuit 103 is a charging pile, an input end of the charging pile is directly connected to the commercial power supply, and an output end of the charging pile is connected to the battery pack 101.
The charging logic selection circuit 104 is further connected to the solar photovoltaic device, and is configured to operate in an off state to realize solar charging when the solar photovoltaic device inputs a power supply, and operate in an on state to realize commercial power charging when the solar photovoltaic device does not input a power supply. Referring to fig. 2, the charging logic selection circuit 104 includes a relay K1, the relay K1 includes a coil connected in parallel to the input terminal of the solar charging management circuit 102 and a switch connected to the commercial power charging management circuit 103 and the anti-reverse circuit 60.
In the present embodiment, solar power generation is realized by the solar charging management circuit 102 and the solar photovoltaic device, and electric energy is stored in the battery pack 101. In the case of the input of the commercial power, the commercial power part of the electric energy may also be stored in the battery pack 101 through the commercial power charging management circuit 103. Under the condition that solar power generation and mains supply input exist simultaneously, the charging logic selection circuit 104 connected to the two ends of the solar photovoltaic device and the solar charging management circuit 102 is utilized to realize that the solar power generation preferentially charges the battery pack 101.
The inverter group 105 is further connected to the battery group 101 and the mode switching circuit 20, and is configured to convert the dc power stored in the battery group 101 into ac power.
The inverter group 105 includes a first inverter N1 and a second inverter N2, in this embodiment, the output power of the first inverter N1 is 300W, and the output power of the second inverter N2 is 5000W.
As shown in fig. 2, the first inverter N1 includes a first Dc positive input terminal Dc1+, a first Dc negative input terminal Dc1-, a first switch terminal Sw1, a first Ac positive output terminal Ac1+ and a first Ac negative output terminal Ac1-, and the second inverter N2 includes a second Dc positive input terminal Dc2+, a second Dc negative input terminal Dc2-, a second switch terminal Sw2, a second Ac positive output terminal Ac2+ and a second Ac negative output terminal Ac 2-.
The first Dc positive input terminal Dc1+ is connected to the second Dc positive input terminal Dc2+, the inverter switch 106, the solar charging switch 107, and the commercial power charging switch 108, and the first Dc negative input terminal Dc 1-is connected to the second Dc negative input terminal Dc2-, the inverter switch 106, the solar charging management circuit 102, and the commercial power charging management circuit 103. The first switch terminal Sw1, the first Ac positive output terminal Ac1+, and the first Ac negative output terminal Ac1 "are respectively connected to the mode switching circuit 20, and the second switch terminal Sw2, the second Ac positive output terminal Ac2+, and the second Ac negative output terminal Ac 2" are respectively connected to the mode switching circuit 20.
The inverter switch 106 is located between the battery pack 101 and the inverter pack 105, when the inverter switch 106 is closed, the battery pack 101 is connected to a power supply system, and when the inverter switch 106 is disconnected, the battery pack 101 is isolated. In this embodiment, the inverter switch 106 is a switch S1.
The solar charging switch 107 is connected to the solar charging management circuit 102, the commercial power charging switch 108, the battery pack 101 and the inverter group 105, and is configured to gate the solar charging management circuit 102 to charge the battery pack 101. In this embodiment, the solar charging switch 107 is a switch S2.
The commercial power charging switch 108 is further connected to the commercial power charging management circuit 103, the battery pack 101 and the inverter group 105, and is configured to gate the commercial power charging management circuit 103 to charge the battery pack 101. In this embodiment, the commercial power charging switch 108 is a switch S3.
The solar charging indication circuit 109 is connected to the solar charging management circuit 102, and is used for indicating whether the solar charging management circuit 102 is in an operating state. In this embodiment, the solar charging indication circuit 109 includes a light emitting diode D1, and the light emitting diode D1 is connected in parallel to two terminals of the output terminal of the solar charging management circuit 102.
The commercial power charging indication circuit 110 is connected to the commercial power charging management circuit 103, and is configured to indicate whether the commercial power charging management circuit 103 is in a working state. In this embodiment, the commercial power charging indication circuit 110 includes a light emitting diode D2, and the light emitting diode D2 is connected in parallel to two terminals of the output terminal of the commercial power charging management circuit 103.
The mode switching circuit 20 is connected to the backup battery module 10, and is configured to switch the backup battery module 10 to operate in the backup power mode or the non-backup power mode.
It is understood that the standby power mode refers to changing the state of the switch S4 to switch the first inverter N1 or the second inverter N2 into the circuit, and the non-standby power mode refers to changing the state of the switch S4 to isolate the first inverter N1 and the second inverter N2 so that there is no switch-in of the inverter into the circuit.
As shown in fig. 2, the mode switching circuit 20 includes a switch S4, a first diode D3, and a second diode D4.
Specifically, the switch S4 includes a switch moving point input end and a switch fixed point output end, the switch moving point input end includes a first moving point input end a1, a second moving point input end a2, a third moving point input end a3, a fourth moving point input end a4, a fifth moving point input end a5 and a sixth moving point input end a6, and the switch fixed point output end includes a first fixed point output end b1, a second fixed point output end b2 and a third fixed point output end b 3. The first moving point input end a1 is connected to the first switch end Sw1 and the anode of the first diode D3, the second moving point input end a2 is connected to the second switch end Sw2 and the anode of the second diode D4, the third moving point input end a3 is connected to the first Ac positive output end Ac1+, the fourth moving point input end a4 is connected to the second Ac positive output end Ac2+, the fifth moving point input end a5 is connected to the first Ac negative output end Ac1-, and the sixth moving point input end a6 is connected to the second Ac negative output end Ac 2-. The first fixed point output b1 is connected to a direct current power supply (DC 24V as shown), and the second fixed point output b2 and the third fixed point output b3 are connected to the path switching circuit 30, respectively. The cathode of the first diode D3 is connected to the cathode of the second diode D4 and the operating power supply (VCC as shown).
In the initial state, the moving point input terminal of the switch is not connected to the fixed point output terminal of the switch, and at this time, the mode switching circuit 20 operates in the standby battery mode. When in the standby power mode, the first fixed point output terminal b1, the second fixed point output terminal b2, and the third fixed point output terminal b3 may be connected to the first moving point input terminal a1, the third moving point input terminal a3, and the fifth moving point input terminal a5, or the second moving point input terminal a2, the fourth moving point input terminal a4, and the sixth moving point input terminal a6, respectively.
The path switching circuit 30 includes a first path mode and a second path mode, the path switching circuit 30 is connected to the mode switching circuit 20, and when the commercial power is not input and the backup battery module 10 operates in the backup power mode, the path switching circuit 30 operates in the first path mode to output the backup power; when a commercial power is input and the backup battery module 10 operates in the backup power mode, the path switching circuit 30 operates in the second path mode to output the commercial power and disconnect the output of the backup power. The path of the first path mode is the battery pack 101, passes through the inverter group 105, the mode switching circuit 20, the path switching circuit 30, the anti-reverse switching circuit 60, and finally passes through the load switch 100, and is output to a load. The path of the second path mode is that the commercial power supply passes through the commercial power switch 80, the commercial power input indicating circuit 90, the path switching circuit 30, the anti-reverse switching circuit 60, and finally passes through the load switch 100 to be output to a load, and at this time, under the action of the switching relay K2, the second light emitting diode D6 is turned on. In addition, when the commercial power supply is used as the only input, the power supply path is that the commercial power supply passes through the commercial power switch 80, the commercial power input indicating circuit 90, the backflow preventing switch circuit 50 and finally the load switch 100 and is output to the load.
In the present embodiment, the path switching circuit 30 includes a switching relay K2, a first light emitting diode D5, and a second light emitting diode D6.
It can be understood that when the commercial power is not input and the backup battery module operates in the backup power mode, and the path switching circuit operates in the first path mode, the first light emitting diode D5 is turned on to emit light. When the commercial power is input and the backup battery module works in the backup power mode, and the path switching circuit works in the second path mode, the second light emitting diode D6 is turned on to emit light. That is, when the inverter is used as the input of the path switching circuit 30, the first light emitting diode D5 is turned on, and the second light emitting diode D6 is turned off, and when the commercial power is used as the input of the path switching circuit 30, the first light emitting diode D5 is turned off, and the second light emitting diode D6 is turned on.
Specifically, the switching relay K2 includes a switching relay coil and a switching relay switch, and an initial state of the switching relay K2 is shown. The switching relay switch comprises a switching relay switch moving point input end and a switching relay switch fixed point output end. The switching relay switch moving point input end comprises a seventh moving point input end a7, an eighth moving point input end a8, a ninth moving point input end a9, a tenth moving point input end a10, an eleventh moving point input end a11 and a twelfth moving point input end a12, and the switching relay switch fixed point output end comprises a fourth fixed point output end b4, a fifth fixed point output end b5 and a sixth fixed point output end b 6.
One end of the switching relay coil is connected with the twelfth moving point input end a12 and the positive pole of the mains supply, and the other end of the switching relay coil is connected with the tenth moving point input end a10 and the negative pole of the mains supply.
In an initial state, that is, when the path switching circuit 30 operates in the first path mode, the seventh moving point input terminal a7 is connected to the fourth fixed point output terminal b4, the eighth moving point input terminal a8 is floating, the ninth moving point input terminal a9 is connected to the fifth fixed point output terminal b5, the tenth moving point input terminal a10 is floating, the eleventh moving point input terminal a11 is connected to the sixth fixed point output terminal b6, and the twelfth moving point input terminal a12 is floating. When the path switching circuit 30 operates in the second path mode, the seventh moving point input terminal a7 is floating, the eighth moving point input terminal a8 is connected to the fourth fixed point output terminal b4, the ninth moving point input terminal a9 is floating, the tenth moving point input terminal a10 is connected to the fifth fixed point output terminal b5, the eleventh moving point input terminal a11 is floating, and the twelfth moving point input terminal a12 is connected to the sixth fixed point output terminal b 6.
Seventh moving point input end a7 with first emitting diode D5's positive pole is connected, eighth moving point input end a8 with second emitting diode D6's positive pole is connected, ninth moving point input end a9 with second fixed point output b2 is connected, tenth moving point input end a10 with mains power supply's negative pole is connected, eleventh moving point input end a11 with third fixed point output b3 is connected, twelfth moving point input end a12 with mains power supply's anodal is connected. The fourth fixed point output b4 is connected to the working power supply, and the fifth fixed point output b5 and the sixth fixed point output b6 are respectively connected to the anti-reverse switch circuit 60. The cathode of the first light emitting diode D5 is connected to the cathode of the second light emitting diode D6 and ground.
The trigger switch circuit 40 includes a trigger mode and a non-trigger mode, the trigger switch circuit 40 is connected to the mode switching circuit 20, and the trigger switch circuit 40 is configured to operate in the trigger mode in the standby power mode and operate in the non-trigger mode in the non-standby power mode.
In the present embodiment, the trigger circuit 40 includes a trigger relay K3 and a third light emitting diode D7.
Wherein, trigger relay K3 is including triggering relay coil and trigger relay switch, trigger relay switch is including triggering relay switch moving point input and triggering relay switch fixed point output, trigger relay switch moving point input includes thirteenth moving point input a13 and fourteenth moving point input a14, trigger relay switch fixed point output includes seventh fixed point output b 7.
One end of the trigger relay coil is connected with the working power supply, and the other end of the trigger relay coil is connected with the ground end. The thirteenth moving point input end a13 is connected to the anti-backflow switch circuit 50, the fourteenth moving point input end a14 is connected to the anode of the third led D7, and the seventh fixed point output end b7 is connected to the negative electrode of the mains supply. The cathode of the third light emitting diode D7 is connected to the anti-backflow switching circuit 50 and the positive electrode of the mains supply.
In the initial state, i.e. in the non-triggered mode, the thirteenth moving point input terminal a13 is connected to the seventh fixed point output terminal b 7. The trigger mode refers to that the trigger relay coil attracts the trigger relay switch under the action of the working power supply VCC, so that the fourteenth fixed point input end a14 is connected with the seventh fixed point output end b 7.
The backflow prevention switch circuit 50 is connected to the trigger switch circuit 40, and is configured to operate in an off state in the trigger mode and operate in an on state in the non-trigger mode.
The anti-backflow switch circuit 50 includes an anti-backflow relay K4 and a fourth light emitting diode D8.
The backflow prevention relay K4 comprises a backflow prevention relay coil and a backflow prevention relay switch, and the backflow prevention relay switch comprises a backflow prevention relay switch moving point input end and a backflow prevention relay switch fixed point output end. The anti-backflow relay switch moving point input end comprises a fifteenth moving point input end a15, a sixteenth moving point input end a16, a seventeenth moving point input end a17 and an eighteenth moving point input end a18, and the anti-backflow relay switch fixed point output end comprises an eighth fixed point output end b8, a ninth fixed point output end b9, a tenth fixed point output end b10 and an eleventh fixed point output end b 11.
In an initial state, that is, when the backflow prevention switch circuit 50 works in an off state, the input end of the moving point of the backflow prevention relay switch is not connected with the fixed-point output end of the backflow prevention relay switch. When the anti-backflow switch circuit 50 operates in the on state, the fifteenth moving point input end a15, the sixteenth moving point input end a16, the seventeenth moving point input end a17 and the eighteenth moving point input end a18 are respectively connected to the eighth fixed point output end b8, the ninth fixed point output end b9, the tenth fixed point output end b10 and the eleventh fixed point output end b 11.
One end of the backflow-preventing relay coil is connected with the cathode of the third light-emitting diode D7 and the anode of the mains supply, and the other end of the backflow-preventing relay coil is connected with a thirteenth action point input end a 13. The fifteenth moving point input end a15 is connected to the positive electrode of the anti-reverse switch circuit 60 and the load, the sixteenth moving point input end a16 is connected to the negative electrode of the anti-reverse switch circuit 60 and the load, the seventeenth moving point input end a17 is connected to the anode of the fourth light emitting diode D8, and the eighteenth moving point input end a18 is connected to the cathode of the fourth light emitting diode D8. Eighth fixed point output b8 with mains supply's anodal connection, ninth fixed point output b9 with mains supply's negative pole is connected, tenth fixed point output b10 with ninth fixed point output b9 is connected, eleventh fixed point output b11 with mains supply's anodal connection.
The reverse prevention switch circuit 60 is respectively connected with the path switching circuit 30 and the reverse prevention switch circuit 50, and in the standby power supply mode, the reverse prevention switch circuit 60 works in a conducting state, and the reverse prevention switch circuit 50 works in a disconnecting state to output the standby power supply or the commercial power supply; in the non-standby power supply mode, the reverse-blocking prevention switch circuit 60 works in an off state, and the reverse-blocking prevention switch circuit 50 works in an on state to output the commercial power supply.
Wherein the anti-reverse switch circuit 60 comprises an anti-reverse relay K5.
The anti-reverse relay K5 comprises an anti-reverse relay coil and an anti-reverse relay switch, and the anti-reverse relay switch comprises an anti-reverse relay switch moving point input end and an anti-reverse relay switch fixed point output end. The anti-reverse relay switch moving point input end comprises a nineteenth moving point input end a19, a twentieth moving point input end a20, a twenty-first moving point input end a21 and a twenty-second moving point input end a22, and the anti-reverse relay switch fixed point output end comprises a twelfth fixed point output end b12, a thirteenth fixed point output end b13, a fourteenth fixed point output end b14 and a fifteenth fixed point output end b 15.
In an initial state, the input end of the switch point of the anti-reverse relay is not connected with the fixed-point output end of the switch of the anti-reverse relay, and the anti-reverse switch circuit 60 is attracted when the path switching circuit 30 works in the first path mode and works in a conducting state. When the path switching circuit 30 operates in the second path mode, the reverse switch prevention circuit 60 operates in an off state.
One end of the anti-reverse relay coil is connected with the working power supply, and the other end of the anti-reverse relay coil is connected with the ground end. The nineteenth moving point input end a19 is connected to the fifteenth moving point input end a15 and the positive pole of the load, the twentieth moving point input end a20 is connected to the sixteenth moving point input end a16 and the negative pole of the load, the twenty-first moving point input end a21 is connected to the charging logic selection circuit 104, and the twenty-second moving point input end a22 is floating. The twelfth fixed-point output terminal b12 is connected to the fifth fixed-point output terminal b5, the thirteenth fixed-point output terminal b13 is connected to the sixth fixed-point output terminal b6, the fourteenth fixed-point output terminal b14 is connected to the commercial power charging management circuit 103, and the fifteenth fixed-point output terminal b15 is floating.
The fault detection circuit 70 is connected to the mode switching circuit 20 and the path switching circuit 30, and includes a fault detection relay K6 and a fifth light emitting diode D9.
Fault detection relay K6 includes fault detection relay coil and fault detection relay switch, fault detection relay switch includes fault detection relay switch fixed point input and fault detection relay switch moving point output. The fixed point input end of the fault detection relay switch comprises a first fixed point input end c1, and the moving point output end of the fault detection relay switch comprises a first moving point output end d1 and a second moving point output end d 2.
In the initial state, the first fixed point input terminal c1 is connected to the first moving point output terminal D1, and when the mode switching circuit 20 is operating in the standby power mode, but there is no ac output between the second fixed point output terminal b and the third fixed point output terminal b3, the coil of the fault detection relay does not operate, the fault detection relay K6 is in the initial state, the fifth light emitting diode D9 is turned on, and the fault lamp is turned on. When the mode switching circuit 20 works in the standby power mode, a normal alternating current output exists between the second fixed point output end b and the third fixed point output end b3, the fault detection relay coil works to attract the fault detection relay switch, at this time, the first fixed point input end c1 is connected with the second moving point output end D2, the fifth light emitting diode D9 is cut off, and the fault lamp is not turned on.
One end of the fault detection relay coil is connected to the second fixed point output terminal b2, and the other end of the fault detection relay coil is connected to the third fixed point output terminal b 3. The first fixed point input end c1 is connected to the working power supply, the first moving point output end D1 is connected to the anode of the fifth led D9, and the second moving point output end D2 is floating. The cathode of the fifth light emitting diode D9 is connected to the ground terminal.
It should be noted that the names of the input terminal and the output terminal of each relay switch in the above embodiments are for clearly and specifically describing the connection relationship of the components, and are not used to limit the voltage and current flow direction of the relay switch, for example, the current flow direction of the relay switch is not limited to be from the input terminal to the output terminal, and vice versa.
The utility power switch 80 is connected to the utility power supply, the utility power input indicating circuit 90, the path switching circuit 30, and the backflow preventing switch circuit 50, and is used for controlling the input of the utility power supply. In this embodiment, the mains switch 80 comprises a switch S5, and when the switch S5 is closed, the mains is input, and when the switch S5 is open, the mains is isolated.
The commercial power input indicating circuit 90 is connected in parallel to two ends of the commercial power supply and is used for indicating the input state of the commercial power supply. In this embodiment, the commercial power input indicating circuit 90 includes a sixth light emitting diode D10.
The load switch 100 is connected to the load, the backflow prevention switch circuit 50, and the reverse prevention switch circuit 60, and is configured to control whether the backup power supply or the commercial power supply supplies power to the load. In this embodiment, the load switch 100 includes a switch S6, and when the switch S6 is closed, the backup power source or the commercial power source supplies power to the load.
In summary, the operation of the power supply circuit 200 is as follows:
(1) when the commercial power is not input and the backup battery module 10 operates in the backup power mode, the path switching circuit 30 operates in the first path mode to output the backup power.
Specifically, the backup battery module 10 stores electric energy generated by solar power generation and/or electric quantity stored when the commercial power is available. The mode switching circuit 20 is used for switching the backup battery module 10 to operate in the backup power mode or the non-backup power mode.
When the backup battery module 10 operates in the backup power mode, one of the inverters of the inverter group 105 is connected to a power supply circuit, the DC power supply DC24V charges the operating power VCC through the first diode D1 or the second diode D2, and the operating power VCC outputs a high level. The path switching circuit 30 is in an initial state, the trigger switch circuit 40 works in the trigger mode according to the working power supply, the backflow prevention switch circuit 50 works in the off state in the trigger mode, and the reverse prevention switch circuit 60 works in the on state according to the working power supply.
In summary, the electric quantity output by the backup battery module 10 passes through the path switching circuit 30, the anti-reverse switch circuit 60, and finally passes through the load switch 100 to be output to the load, that is, the path switching circuit 30 operates in the first path mode to output the backup power.
(2) When a commercial power is input and the backup battery module 10 operates in the backup power mode, the path switching circuit 30 operates in the second path mode to output the commercial power and disconnect the output of the backup power.
When the backup battery module 10 operates in the backup power mode, one of the inverters of the inverter group 105 is connected to a power supply circuit, the DC power supply DC24V charges the operating power VCC through the first diode D1 or the second diode D2, and the operating power VCC outputs a high level. Because the commercial power supply is input, the path switching circuit 30 switches states, the trigger switch circuit 40 works in the trigger mode according to the working power supply, the backflow prevention switch circuit 50 works in the off state in the trigger mode, and the backflow prevention switch circuit 60 works in the on state according to the working power supply.
To sum up, the electric quantity output by the commercial power supply passes through the path switching circuit 30, the anti-reverse switch circuit 60, and finally passes through the load switch 100 to be output to the load, that is, the path switching circuit 30 works in the second path mode to output the commercial power supply and disconnect the output of the standby power supply.
(3) When a commercial power supply is input and the backup battery module 10 operates in the non-backup power supply mode, that is, when the commercial power supply is input as a unique power supply, any one inverter in the inverter group 105 cannot be connected to a power supply circuit, and the power supply outputs a low level. Because the commercial power supply is input, the path switching circuit 30 switches the state and attracts the relay switch of the path switching circuit, the trigger switch circuit 40 works in the non-trigger mode according to the working power supply, the backflow prevention switch circuit 50 works in the on state in the non-trigger mode, and the backflow prevention switch circuit 60 works in the off state according to the working power supply.
To sum up, the electric quantity output by the mains supply passes through the backflow prevention switch circuit 50 and finally passes through the load switch 100 to be output to the load.
The power supply circuit provided by the embodiment of the invention integrates the mains supply and the standby power supply in the same power supply network system, realizes the switching between the mains supply and the standby power supply through the mode switching circuit and the path switching circuit according to the mode of the standby power supply and the input condition of the mains supply, and preferentially switches to the mains supply to supply power under the condition of the input of the mains supply. On the other hand, through the charging logic selection circuit, the solar power generation is realized to charge the battery pack preferentially.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A power supply circuit, comprising:
the standby battery module comprises a standby power supply mode and a non-standby power supply mode and is used for providing standby power supply;
the mode switching circuit is connected with the standby battery module and is used for switching the standby battery module to work in the standby power supply mode or the non-standby power supply mode;
the path switching circuit comprises a first path mode and a second path mode, is connected with the mode switching circuit, and works in the first path mode to output the standby power supply when a mains supply is not input and the standby battery module works in the standby power supply mode; when a mains supply is input and the standby battery module works in the standby power supply mode, the path switching circuit works in the second path mode to output the mains supply and disconnect the output of the standby power supply;
the mode switching circuit comprises a switching switch, a first diode and a second diode;
the change-over switch comprises a change-over switch moving point input end and a change-over switch fixed point output end, the change-over switch moving point input end is not connected with the change-over switch fixed point output end in an initial state, the change-over switch moving point input end comprises a first moving point input end, a second moving point input end, a third moving point input end, a fourth moving point input end, a fifth moving point input end and a sixth moving point input end, and the change-over switch fixed point output end comprises a first fixed point output end, a second fixed point output end and a third fixed point output end;
the first moving point input end, the second moving point input end, the third moving point input end, the fourth moving point input end, the fifth moving point input end and the sixth moving point input end are all connected with the standby battery module, the first moving point input end is further connected with the anode of the first diode, and the second moving point input end is further connected with the anode of the second diode;
the first fixed point output end is connected with a direct current power supply, and the second fixed point output end and the third fixed point output end are respectively connected with the path switching circuit;
and the cathode of the first diode is connected with the cathode of the second diode and an operating power supply.
2. The power supply circuit of claim 1, further comprising:
the trigger switch circuit comprises a trigger mode and a non-trigger mode, the trigger switch circuit is connected with the mode switching circuit, and the trigger switch circuit is used for working in the trigger mode in the standby power supply mode and working in the non-trigger mode in the non-standby power supply mode;
the backflow prevention switch circuit is connected with the trigger switch circuit and used for working in a disconnected state in the trigger mode and working in a connected state in the non-trigger mode;
the reverse-flow prevention switch circuit is respectively connected with the path switching circuit and the reverse-flow prevention switch circuit, and works in a conducting state and a disconnecting state under the standby power supply mode to output the standby power supply or the commercial power supply; and under the non-standby power supply mode, the reverse-flow prevention switch circuit works in a disconnected state, and the reverse-flow prevention switch circuit works in a connected state to output the commercial power supply.
3. The power supply circuit according to claim 2, wherein the backup battery module comprises a battery pack, a solar charging management circuit, a commercial power charging management circuit, a charging logic selection circuit and an inverter group;
the battery pack is used for storing electric quantity;
the solar charging management circuit is connected with the charging logic selection circuit, the commercial power charging management circuit, the battery pack, the inverter pack and the solar photovoltaic device and is used for realizing solar charging;
the commercial power charging management circuit is also connected with the charging logic selection circuit, the battery pack, the inverter group and the commercial power supply and is used for realizing commercial power charging;
the charging logic selection circuit is also connected with the solar photovoltaic device and is used for working in a disconnected state under the condition that the solar photovoltaic device inputs a power supply to realize solar charging, and working in a connected state under the condition that the solar photovoltaic device does not input the power supply to realize commercial power charging;
the inverter group is also connected with the battery pack and the mode switching circuit and is used for converting the direct current stored in the battery pack into alternating current.
4. The power supply circuit of claim 3, wherein the backup battery module further comprises an inverter switch, a solar charging switch, a mains charging switch, a solar charging indication circuit and a mains charging indication circuit;
the inverter switch is positioned between the battery pack and the inverter pack;
the solar charging switch is connected with the solar charging management circuit, the commercial power charging switch, the battery pack and the inverter group and is used for gating the solar charging management circuit to charge the battery pack;
the commercial power charging switch is also connected with the commercial power charging management circuit, the battery pack and the inverter group and is used for gating the commercial power charging management circuit to charge the battery pack;
the solar charging indicating circuit is connected with the solar charging management circuit and is used for indicating whether the solar charging management circuit is in a working state or not;
the commercial power charging indicating circuit is connected with the commercial power charging management circuit and used for indicating whether the commercial power charging management circuit is in a working state or not.
5. The power supply circuit according to claim 4, wherein the inverter group comprises a first inverter and a second inverter, the first inverter comprises a first direct current positive input terminal, a first direct current negative input terminal, a first switch terminal, a first alternating current positive output terminal and a first alternating current negative output terminal, the second inverter comprises a second direct current positive input terminal, a second direct current negative input terminal, a second switch terminal, a second alternating current positive output terminal and a second alternating current negative output terminal;
the first dc positive input end is connected to the second dc positive input end, the inverter switch, the solar charging switch and the mains charging switch, and the first dc negative input end is connected to the second dc negative input end, the inverter switch, the solar charging management circuit and the mains charging management circuit;
the first switch end, the first alternating current positive output end and the first alternating current negative output end are respectively connected with the mode switching circuit, and the second switch end, the second alternating current positive output end and the second alternating current negative output end are respectively connected with the mode switching circuit.
6. The power supply circuit according to claim 3, wherein the path switching circuit includes a switching relay, a first light emitting diode, and a second light emitting diode;
the switching relay comprises a switching relay coil and a switching relay switch, the switching relay switch comprises a switching relay switch moving point input end and a switching relay switch fixed point output end, the switching relay switch moving point input end comprises a seventh moving point input end, an eighth moving point input end, a ninth moving point input end, a tenth moving point input end, an eleventh moving point input end and a twelfth moving point input end, and the switching relay switch fixed point output end comprises a fourth fixed point output end, a fifth fixed point output end and a sixth fixed point output end;
in an initial state, the seventh moving point input end is connected with the fourth fixed point output end, the eighth moving point input end is suspended, the ninth moving point input end is connected with the fifth fixed point output end, the tenth moving point input end is suspended, the eleventh moving point input end is connected with the sixth fixed point output end, and the twelfth moving point input end is suspended;
one end of the switching relay coil is connected with the twelfth moving point input end and the positive electrode of the mains supply, and the other end of the switching relay coil is connected with the tenth moving point input end and the negative electrode of the mains supply;
the seventh moving point input end is connected with the anode of the first light-emitting diode, the eighth moving point input end is connected with the anode of the second light-emitting diode, the ninth moving point input end is connected with the second fixed point output end, the tenth moving point input end is connected with the cathode of the mains supply, the eleventh moving point input end is connected with the third fixed point output end, and the twelfth moving point input end is connected with the anode of the mains supply;
the fourth fixed point output end is connected with the working power supply, and the fifth fixed point output end and the sixth fixed point output end are respectively connected with the anti-reverse switch circuit;
and the cathode of the first light-emitting diode is connected with the cathode of the second light-emitting diode and the ground terminal.
7. The power supply circuit of claim 6, wherein the trigger switch circuit comprises a trigger relay and a third light emitting diode;
the trigger relay comprises a trigger relay coil and a trigger relay switch, the trigger relay switch comprises a trigger relay switch moving point input end and a trigger relay switch fixed point output end, the trigger relay switch moving point input end comprises a thirteenth moving point input end and a fourteenth moving point input end, the trigger relay switch fixed point output end comprises a seventh fixed point output end, and the thirteenth moving point input end is connected with the seventh fixed point output end in an initial state;
one end of the trigger relay coil is connected with the working power supply, and the other end of the trigger relay coil is connected with the ground end;
the input end of the thirteenth moving point is connected with the backflow prevention switch circuit, the input end of the fourteenth moving point is connected with the anode of the third light emitting diode, and the output end of the seventh fixed point is connected with the cathode of the commercial power supply;
the cathode of the third light-emitting diode is connected with the anti-backflow switch circuit and the anode of the mains supply;
the backflow prevention switch circuit comprises a backflow prevention relay and a fourth light emitting diode;
the backflow-preventing relay comprises a backflow-preventing relay coil and a backflow-preventing relay switch, the backflow-preventing relay switch comprises a backflow-preventing relay switch moving point input end and a backflow-preventing relay switch fixed point output end, in an initial state, the backflow-preventing relay switch moving point input end is not connected with the backflow-preventing relay switch fixed point output end, the backflow-preventing relay switch moving point input end comprises a fifteenth moving point input end, a sixteenth moving point input end, a seventeenth moving point input end and an eighteenth moving point input end, and the backflow-preventing relay switch fixed point output end comprises an eighth fixed point output end, a ninth fixed point output end, a tenth fixed point output end and an eleventh fixed point output end;
one end of the anti-backflow relay coil is connected with the cathode of the third light-emitting diode and the anode of the mains supply, and the other end of the anti-backflow relay coil is connected with the input end of the thirteenth actuating point;
the fifteenth moving point input end is connected with the anti-reverse switch circuit and the positive electrode of the load, the sixteenth moving point input end is connected with the anti-reverse switch circuit and the negative electrode of the load, the seventeenth moving point input end is connected with the anode of the fourth light-emitting diode, and the eighteenth moving point input end is connected with the cathode of the fourth light-emitting diode;
the eighth fixed point output end is connected with the anode of the commercial power supply, the ninth fixed point output end is connected with the cathode of the commercial power supply, the tenth fixed point output end is connected with the ninth fixed point output end, and the eleventh fixed point output end is connected with the anode of the commercial power supply;
the anti-reverse switching circuit comprises an anti-reverse relay, the anti-reverse relay comprises an anti-reverse relay coil and an anti-reverse relay switch, the anti-reverse relay switch comprises an anti-reverse relay switch moving point input end and an anti-reverse relay switch fixed point output end, the anti-reverse relay switch moving point input end is not connected with the anti-reverse relay switch fixed point output end in an initial state, the anti-reverse relay switch moving point input end comprises a nineteenth moving point input end, a twentieth moving point input end, a twenty-first moving point input end and a twenty-second moving point input end, and the anti-reverse relay switch fixed point output end comprises a twelfth fixed point output end, a thirteenth fixed point output end, a fourteenth fixed point output end and a fifteenth fixed point output end;
one end of the anti-reverse relay coil is connected with the working power supply, and the other end of the anti-reverse relay coil is connected with the ground end;
the nineteenth moving point input end is connected with the fifteenth moving point input end and the positive pole of the load, the twentieth moving point input end is connected with the sixteenth moving point input end and the negative pole of the load, the twenty-first moving point input end is connected with the charging logic selection circuit, and the twenty-second moving point input end is suspended;
the twelfth fixed point output end is connected with the fifth fixed point output end, the thirteenth fixed point output end is connected with the sixth fixed point output end, the fourteenth fixed point output end is connected with the commercial power charging management circuit, and the fifteenth fixed point output end is suspended.
8. The power supply circuit according to claim 6 or 7, wherein the power supply circuit further comprises a fault detection circuit connected to the mode switching circuit and the path switching circuit, the fault detection circuit including a fault detection relay and a fifth light emitting diode;
the fault detection relay comprises a fault detection relay coil and a fault detection relay switch, the fault detection relay switch comprises a fault detection relay switch fixed point input end and a fault detection relay switch moving point output end, the fault detection relay switch fixed point input end comprises a first fixed point input end, the fault detection relay switch moving point output end comprises a first moving point output end and a second moving point output end, and the first fixed point input end is connected with the first moving point output end in an initial state;
one end of the fault detection relay coil is connected with the second fixed point output end, and the other end of the fault detection relay coil is connected with the third fixed point output end;
the first fixed point input end is connected with the working power supply, the first moving point output end is connected with the anode of the fifth light-emitting diode, and the second moving point output end is suspended; and the cathode of the fifth light-emitting diode is connected with the ground end.
9. The power supply circuit of claim 7, further comprising a mains switch, a mains input indication circuit, and a load switch;
the mains supply switch is connected with the mains supply, the mains supply input indicating circuit, the path switching circuit and the backflow preventing switch circuit and is used for controlling the input of the mains supply;
the commercial power input indicating circuit is connected in parallel at two ends of the commercial power supply and is used for indicating the input state of the commercial power supply;
the load switch is connected with the load, the backflow prevention switch circuit and the reverse prevention switch circuit and used for controlling whether the standby power supply or the commercial power supply supplies power to the load or not.
CN201811611371.8A 2018-12-27 2018-12-27 Power supply circuit Expired - Fee Related CN109638955B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811611371.8A CN109638955B (en) 2018-12-27 2018-12-27 Power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811611371.8A CN109638955B (en) 2018-12-27 2018-12-27 Power supply circuit

Publications (2)

Publication Number Publication Date
CN109638955A CN109638955A (en) 2019-04-16
CN109638955B true CN109638955B (en) 2020-06-30

Family

ID=66078227

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811611371.8A Expired - Fee Related CN109638955B (en) 2018-12-27 2018-12-27 Power supply circuit

Country Status (1)

Country Link
CN (1) CN109638955B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111050449B (en) * 2019-11-15 2022-02-18 国网浙江省电力有限公司嘉兴供电公司 Few-maintenance lighting system
CN113715660A (en) * 2021-10-09 2021-11-30 深圳市中蓝绿源科技有限公司 Intelligent charging pile

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5670833A (en) * 1994-11-23 1997-09-23 General Signal Power Systems, Inc. Power transfer method and apparatus for uninterruptible power systems
CN102185358A (en) * 2011-05-24 2011-09-14 深圳茂硕电子科技有限公司 Simple and practical movable uninterruptible power supply
CN103545911B (en) * 2013-10-25 2015-08-19 广东易事特电源股份有限公司 A kind of uninterruptible power system of dual input intelligent power supply
CN104836321B (en) * 2015-05-08 2017-11-28 南京熊猫电子股份有限公司 Intelligent photovoltaic energy-storage system power supply and its control method
CN207251299U (en) * 2017-07-21 2018-04-17 佛山市金广源电源科技有限公司 A kind of backup power system of fuel cell

Also Published As

Publication number Publication date
CN109638955A (en) 2019-04-16

Similar Documents

Publication Publication Date Title
KR101268356B1 (en) Storage system that maximizes the utilization of renewable energy
CA2686858C (en) Solar powered apparatus
CN102710005A (en) Power supply method for grid-connected and off-grid dual-purpose wind and light complement power generation system
CN109638955B (en) Power supply circuit
CN112865091A (en) Energy storage system and switching power supply thereof
CN109599935A (en) Light hydrogen energy-storage power supplying apparatus and its method of supplying power to
CN205791745U (en) A kind of generator set storage battery charging system
CN201018313Y (en) Domestic solar energy power supply system
CN201576950U (en) Vehicle-mounted solar portable power source
CN216851392U (en) Battery management control system of flow battery
TWI686564B (en) Hybrid green-energy street light apparatus
CN105515154A (en) Off-grid/grid-connected household energy storage system
CN215186036U (en) Multifunctional power supply device for base station
Sabry et al. Battery Backup Power System for Electrical Appliances with Two Options of Primary Power Sources
CN202218031U (en) Off-grid type electric power input control system
JP4977805B1 (en) Stand-alone power supply
CN215071777U (en) Wisdom street lamp
CN209767220U (en) Power supply circuit and power supply device
CN204652285U (en) A kind of small-sized household solar wind-energy is met an urgent need intelligent power supply
CN203761058U (en) Solar DC grid-connected generation DC-DC special-purpose control device of communication base station
CN205610317U (en) Novel minisize power grid
CN110445172A (en) A kind of double loop residents photovoltaic energy storage system and its method of supplying power to
JP2012227999A (en) Photovoltaic power storage and generation system
CN109861200A (en) The light storage DC grid system and its operation method of off-network black starting-up
Joseph et al. Battery management system for DC nanogrid

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200630

Termination date: 20201227