CN107093912B - Household photovoltaic high-efficiency energy storage power supply equipment - Google Patents

Household photovoltaic high-efficiency energy storage power supply equipment Download PDF

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CN107093912B
CN107093912B CN201710378391.4A CN201710378391A CN107093912B CN 107093912 B CN107093912 B CN 107093912B CN 201710378391 A CN201710378391 A CN 201710378391A CN 107093912 B CN107093912 B CN 107093912B
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resistor
electrode
triode
respectively connected
capacitor
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CN107093912A (en
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鞠振河
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Juliushun Clean Energy Technology Shenyang Co ltd
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Shenyang Qingneng Institute Clean Energy Co ltd
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    • H02J3/383—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Household photovoltaic high-efficiency energy storage power supply equipment belongs to the technical field of photovoltaic energy storage systems, and particularly relates to household photovoltaic high-efficiency energy storage power supply equipment. The invention provides household photovoltaic high-efficiency energy storage power supply equipment which effectively and reasonably utilizes electricity generated by solar energy. The invention comprises a grid-connected inverter, an AC/DC switching power supply, a lithium battery charge-discharge controller, a lithium battery pack, a DC/AC inverter, a dual-power automatic conversion switch, a scheduling system and a photovoltaic module.

Description

Household photovoltaic high-efficiency energy storage power supply equipment
Technical Field
The invention belongs to the technical field of photovoltaic energy storage systems, and particularly relates to household photovoltaic high-efficiency energy storage and power supply equipment.
Background
At present, the capacity of a PV solar panel is generally 3 Kw-10 kW, the household energy is installed in a household, the direct current generated by solar energy is changed into alternating current through an inverter, and the generated electricity from the inverter is supplied to a load for use. But because the energy storage part is not provided, the electricity generated by solar energy cannot be effectively and reasonably utilized.
Disclosure of Invention
Aiming at the problems, the invention provides the household photovoltaic high-efficiency energy storage power supply equipment which effectively and reasonably utilizes the electricity generated by solar energy.
In order to achieve the purpose, the invention adopts the following technical scheme that the system comprises a grid-connected inverter, an AC/DC switching power supply, a lithium battery charge-discharge controller, a lithium battery pack, a DC/AC inverter, a dual-power automatic conversion switch, a dispatching system and a photovoltaic module, and is structurally characterized in that an electric energy input port of the grid-connected inverter is respectively connected with an electric energy output port of the photovoltaic module and the lithium battery pack, the positive end of the lithium battery pack is connected with the electric energy positive electrode input end of the grid-connected inverter through a forward diode, and the negative end of the lithium battery pack is connected with the electric energy negative electrode input end of the grid-connected inverter through a normally open switch of a relay K1.
The power output end of the grid-connected inverter is respectively connected with the standby power input end of the power grid and the double-power automatic conversion switch and the power input end of the AC/DC switching power supply, the power input end N of the AC/DC switching power supply is connected with the power output end N of the grid-connected inverter through a normally open switch of a relay K2, and the power input end L of the AC/DC switching power supply is connected with the power output end L of the grid-connected inverter; the control output port of the dispatching system is respectively connected with the control input port of the relay K1 and the control input port of the relay K2.
The electric energy output end of the AC/DC switching power supply is connected with a lithium battery pack through a lithium battery charge-discharge controller, the lithium battery pack is connected with the electric energy input end of a DC/AC inverter, the electric energy output end of the DC/AC inverter is connected with the common electric energy input end of a dual-power automatic transfer switch, and the load terminal of the dual-power automatic transfer switch is connected with a household main electric brake.
The lithium battery charge-discharge controller comprises a charge signal control part, a signal inverting part, a first charge path, a second charge path, a first switch part and a second switch part, wherein the lithium battery pack comprises a first lithium battery part and a second lithium battery part, a control signal output port of the charge signal control part is respectively connected with a control signal input port of the first charge path and a control signal input port of the signal inverting part, and a control signal output port of the signal inverting part is connected with a control signal input port of the second charge path.
The control signal output port of the first path of charging is connected with the control signal input port of the first switch part, the electric energy input end of the first switch part is connected with the output positive end of the AC/DC switch power supply, the electric energy output end of the first switch part is respectively connected with the negative end of the first lithium battery part and the cathode of the diode D25, the anode of the diode D25 is grounded, the anode end of the first lithium battery part is respectively connected with the output negative end of the AC/DC switch power supply and the positive end of the lithium battery pack, and the negative end of the lithium battery pack is grounded.
The control signal output port of the second path of charging is connected with the control signal input port of the second switch part, the electric energy input end of the second switch part is connected with the output positive end of the AC/DC switch power supply, the electric energy output end of the second switch part is respectively connected with the negative end of the second lithium battery part and the cathode of the diode D26, the anode of the diode D26 is grounded, and the anode end of the second lithium battery part is respectively connected with the output negative end of the AC/DC switch power supply and the positive end of the lithium battery pack.
As a preferable scheme, the grid-connected inverter adopts an HP10000-148 type, the AC/DC switching power supply adopts an S-120-48 type switching power supply, the DC/AC inverter adopts a 48-500 type inverter, and the double-power automatic conversion switch adopts a GCQ2-63 type automatic conversion switch.
The invention has the beneficial effects that.
The inverter converts direct current generated by solar energy into alternating current, is connected with a power grid, is used immediately after being sent out, and is connected with the Internet by residual electricity, and the generated electricity from the inverter is preferentially supplied to a load for use, and the residual electricity is supplied to the power grid. Through lithium cell energy storage electric quantity, dispatch energy storage, K1, K2 receive dispatch energy storage control, if the user is in the region when realizing the ladder price (peak valley flat price), 11 pm to 5 am, the charges of electricity are very cheap, the millet electricity should not exceed 3 hair, K2 closes, charges for the battery, is full of. After the solar energy is lightened in the morning, the power consumption is started from 5 to 8, the power price is high, when the solar energy is not enough, the power in the lithium battery is sent to a power grid through the grid-connected inverter by closing K1, and the power price is high at the moment, so that money can be sold.
In order to ensure the normal operation of the storage battery, the storage battery is charged by both a power grid and solar energy.
On the basis of construction of the distributed photovoltaic farmers, the distributed farmers are constructed to store energy. Each household is provided with 10kWh ternary lithium battery energy storage, which is equivalent to 13 blocks of 200Ah/3.6V series ternary lithium battery cost 4 yuan/Ah, each household inputs 1 ten thousand yuan, the energy storage cost 2 yuan of 10-degree electricity is stored in the valley according to 0.2 yuan/kWh, the peak energy storage of the power grid is sold, 0.83+0.42 yuan = 1.25 yuan/degree, and daily income is that: 12.5-2-10-one year energy storage income 4320-one year, and energy storage investment recovery period 2.3 years.
Drawings
The invention is further described below with reference to the drawings and the detailed description. The scope of the present invention is not limited to the following description.
Fig. 1 is a schematic block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit diagram of a dispatch system of the present invention.
Fig. 3 is a schematic block diagram of a portion of the circuit of the charge-discharge controller and the lithium battery pack of the present invention.
Fig. 4 is a schematic circuit diagram of a portion of a lithium battery charge-discharge controller and a lithium battery pack according to the present invention.
Fig. 5, 6, 7, 8, 9 are enlarged views of portions of fig. 4.
A, B, C, D in fig. 4 corresponds to A, B, C, D in fig. 3.
Detailed Description
As shown in the figure, the system comprises a grid-connected inverter, an AC/DC switching power supply, a lithium battery charge-discharge controller, a lithium battery pack, a DC/AC inverter, a dual-power automatic conversion switch, a scheduling system and a photovoltaic module, wherein an electric energy input port of the grid-connected inverter is respectively connected with an electric energy output port of the photovoltaic module and the lithium battery pack, a positive electrode end of the lithium battery pack is connected with an electric energy positive electrode input end of the grid-connected inverter through a forward diode, and a negative electrode end of the lithium battery pack is connected with an electric energy negative electrode input end of the grid-connected inverter through a normally open switch of a relay K1.
The power output end of the grid-connected inverter is respectively connected with the standby power input end of the power grid and the double-power automatic conversion switch and the power input end of the AC/DC switching power supply, the power input end N of the AC/DC switching power supply is connected with the power output end N of the grid-connected inverter through a normally open switch of a relay K2, and the power input end L of the AC/DC switching power supply is connected with the power output end L of the grid-connected inverter; the control output port of the dispatching system is respectively connected with the control input port of the relay K1 and the control input port of the relay K2.
The electric energy output end of the AC/DC switching power supply is connected with a lithium battery pack through a lithium battery charge-discharge controller, the lithium battery pack is connected with the electric energy input end of a DC/AC inverter, the electric energy output end of the DC/AC inverter is connected with the common electric energy input end of a dual-power automatic transfer switch, and the load terminal of the dual-power automatic transfer switch is connected with a household main electric brake.
The grid-connected inverter adopts an HP10000-148 type, the AC/DC switching power supply adopts an S-120-48 type switching power supply, the DC/AC inverter adopts a 48-500 type inverter, and the double-power automatic conversion switch adopts a GCQ2-63 type automatic conversion switch.
The dispatching system comprises an STC89C52 MCU, a pin 40 of the MCU is respectively connected with one end of a first resistor and one end of a second resistor, the other end of the first resistor is connected with the positive electrode of the input end of a first PC817 chip, the negative electrode of the input end of the first PC817 chip is connected with the pin 32 of the MCU, the collector electrode of the output end of the first PC817 chip is connected with the base electrode of a PNP triode Q1, the emitter electrode of the triode Q1 is respectively connected with one end of a control input port of a relay K1 and the anode of a first diode, the cathode of the first diode is respectively connected with the other end of the control input port of the relay K1 and a 5V power supply, and the collector electrode of the triode Q1 and the emitter electrode of the output end of the first PC817 chip are grounded.
The other end of the second resistor is connected with the positive electrode of the input end of the second PC817 chip, the negative electrode of the input end of the second PC817 chip is connected with the 22 pin of the MCU, the collector of the output end of the second PC817 chip is connected with the base of the PNP triode Q2, the emitter of the triode Q2 is respectively connected with one end of the control input port of the relay K2 and the anode of the second diode, the cathode of the second diode is respectively connected with the other end of the control input port of the relay K2 and the 5V power supply, and the collector of the triode Q2 and the emitter of the output end of the second PC817 chip are grounded.
The pins 14 and 15 of the MCU are respectively connected with the pins 16 and 15 of the ESP-07 chip U7 correspondingly, the pin 10 of the U7 is grounded through a third resistor, the pin 9 of the U7 is grounded, the pin 3 of the U7 is connected with a 3.3V power supply through a fourth resistor, and the pin 8 of the U7 is connected with a 3.3V power supply.
The device can be controlled by a mobile phone APP, the device is operated in a wifi internet state at home, U7 is a wifi module, and the STC89C52 MCU drives the triode Q1 (Q2) through the optocoupler PC817 to control the on-off K1 (K2) of the relay.
The lithium battery charge-discharge controller comprises a charge signal control part, a signal inverting part, a first charge path, a second charge path, a first switch part and a second switch part, wherein the lithium battery pack comprises a first lithium battery part and a second lithium battery part, a control signal output port of the charge signal control part is respectively connected with a control signal input port of the first charge path and a control signal input port of the signal inverting part, and a control signal output port of the signal inverting part is connected with a control signal input port of the second charge path.
The control signal output port of the first path of charging is connected with the control signal input port of the first switch part, the electric energy input end of the first switch part is connected with the output positive end of the AC/DC switch power supply, the electric energy output end of the first switch part is respectively connected with the negative end of the first lithium battery part and the cathode of the diode D25, the anode of the diode D25 is grounded, the anode end of the first lithium battery part is respectively connected with the output negative end of the AC/DC switch power supply and the positive end of the lithium battery pack, and the negative end of the lithium battery pack is grounded.
The control signal output port of the second path of charging is connected with the control signal input port of the second switch part, the electric energy input end of the second switch part is connected with the output positive end of the AC/DC switch power supply, the electric energy output end of the second switch part is respectively connected with the negative end of the second lithium battery part and the cathode of the diode D26, the anode of the diode D26 is grounded, and the anode end of the second lithium battery part is respectively connected with the output negative end of the AC/DC switch power supply and the positive end of the lithium battery pack.
The charging signal control part comprises an STM32F103C8T6 chip U1, the 10 pins of the U1 are grounded through a resistor R76 and an address setting connector P3 in sequence, the 13 pin of the U1 is respectively connected with one end of a capacitor C9 and the 1 pin of an infrared receiving connector P2, the other end of the capacitor C9 is respectively connected with the ground wire, the 2 pin of the infrared receiving connector P2 and one end of a capacitor C8, and the other end of the capacitor C8 is respectively connected with the 3 pin of the infrared receiving connector P2 and a 3.3V power supply; the pin 14 of U1 connects 3.3V power through forward diode D7, the pin 15 of U1 connects 3.3V power through forward diode D6, the pin 16 of U1 connects 3.3V power through forward diode D5, the pin 17 of U1 connects 3.3V power through forward diode D4.
The U1 pin 5 is connected with one end of a capacitor C12 and one end of a crystal oscillator G1 respectively, the other end of the crystal oscillator G1 is connected with the U1 pin 6 and one end of a capacitor C13 respectively, the other end of the capacitor C13 is connected with the other end of the capacitor C12, the ground wire and the 1 pin of a MAX812 chip D14 respectively through a resistor R11, the D14 pin 4 is connected with a 3.3V power supply, the D14 pin 2 is connected with the U1 pin 7 through a resistor R15, the U1 pin 24 is connected with one end of an inductor L1, the U1 pin 36, the U1 pin 48, one end of an inductor L2, one end of a capacitor C14, one end of a capacitor C15 and one end of a capacitor C17 respectively, the other end of the inductor L1 is connected with the 3.3V power supply, and the other end of the inductor L2 is connected with one end of a capacitor C16, one end of a capacitor C18 and the U1 pin 9 of the other end of the capacitor C14, the other end of the capacitor C17 and the other end of the capacitor C16 is grounded.
The pin 18 of the U1 is respectively connected with the cathode of the diode D24, one end of the resistor R75, one end of the capacitor C33 and one end of the resistor R74, and the anode of the diode D24, the other end of the resistor R75 and the other end of the capacitor C33 are grounded; the other end of the resistor R74 is respectively connected with the positive electrode of the lithium battery pack and the positive electrode of the diode D3, the negative electrode of the diode D3 is respectively connected with the positive electrode of the capacitor C4, one end of the capacitor C5, 3 pins of the HT7550-5 chip D1-1 and 3 pins of the HT7550-5 chip D1, the negative electrode of the capacitor C4 and the other end of the capacitor C5 are grounded, 1 pin of the D1-1 is respectively connected with 1 pin of the D1, the negative electrode of the voltage stabilizing diode D10, one end of the resistor R1 and the positive electrode of the capacitor C7, the positive electrode of the voltage stabilizing diode D10 and the negative electrode of the capacitor C7 are grounded, the other end of the resistor R1 is respectively connected with 2 pin of the D1, 2 pin of the D1-1, one end of the bidirectional transient suppression diode 1, one end of the positive electrode of the capacitor C6, one end of the capacitor C2, the power supply, 1117MPX-3.3 chip D2, the other end of the capacitor VP1, the negative electrode of the capacitor C6 and the other end of the capacitor C2 are grounded, and the positive electrode of the capacitor 2 is respectively connected with 3.3V power supply, the capacitor C1 and the other end of the capacitor C3 and the ground.
The signal inverting part comprises an NPN triode VT17, the base electrode of the triode VT17 is connected with the pin 45 of U1 through a resistor R17, the emitter electrode of the triode VT17 is grounded, and the collector electrode of the triode VT17 is connected with a power supply VCC through a resistor R21.
The first switch part comprises N-channel enhancement type field effect transistors Q2, Q3, Q5 and Q6, and forward zener diodes are connected between the source electrode and the drain electrode of the field effect transistor Q2, between the source electrode and the drain electrode of the field effect transistor Q3, between the source electrode and the drain electrode of the field effect transistor Q5 and between the source electrode and the drain electrode of the field effect transistor Q6.
The first path of charging comprises a resistor R35, one end of the resistor R35 is connected with a pin 45 of U1, the other end of the resistor R35 is connected with a base electrode of an NPN triode VT5, an emitter electrode of the triode VT5 is grounded, the collector electrode of the triode VT5 is respectively connected with one end of a resistor R18 and a base electrode of a PNP triode VT2 through a resistor R22, the emitter electrode of the triode VT2 is respectively connected with the other end of the resistor R18, a power VCC, one end of a resistor R19 and a collector electrode of the NPN triode VT1, the base electrode of the triode VT1 is respectively connected with the other end of the resistor R19, the collector electrode of the NPN triode VT3 and a base electrode of a PNP triode VT4, the base electrode of the triode VT3 is respectively connected with a ground wire, the collector electrode of the triode VT4 and one end of the resistor R36, the emitter electrode of the triode VT4 is respectively connected with the emitter electrode of the triode VT1, the other end of the resistor R36, one end of the resistor R50 and one end of the resistor R51, the other end of the resistor R50 is respectively connected with a grid electrode of a field effect transistor Q3, the other end of the resistor R51 is connected with a grid electrode of a field effect transistor Q6, the other end of the resistor R51 is respectively connected with a source electrode of the field effect transistor Q6, and the anode of the field effect transistor Q6 is respectively connected with one end of a resistor R55, a resistor R55 and one end of a capacitor, a capacitor and one end of a capacitor is respectively connected with one end of a resistor and one end of a capacitor is connected with the resistor and one end of the resistor is a capacitor is connected with the end 28; the cathode of the diode D20 is respectively connected with one end of a resistor R52, one end of a C28, one end of a resistor R44 and one end of a resistor R8, the other end of the resistor R44 is respectively connected with one end of a resistor R42 and the anode of the diode D21, and the other end of the resistor R42 is connected with the positive end of the first lithium battery part.
The other end of the resistor R8 is respectively connected with one end of the capacitor C10 and one end of the resistor R12, the other end of the capacitor C10 is grounded, the other end of the resistor R12 is respectively connected with one end of the resistor R10 and the 3 pin of the LM258AD chip U2A, the other end of the resistor R10 is respectively connected with one end of the resistor R2 and one end of the resistor R3, the other end of the resistor R3 is grounded, and the other end of the resistor R2 is connected with the power supply VCC; the pin 2 of the U2A is respectively connected with one end of a resistor R9, one end of a resistor R13 and one end of a capacitor C20, and the other end of the resistor R9 is grounded; the other end of the capacitor C20 is respectively connected with the other end of the resistor R13, the 1 pin of the U2A and one end of the resistor R14, the 8 pin of the U2A is respectively connected with the power VCC and one end of the capacitor C25, and the other end of the capacitor C25 is grounded; the other end of the resistor R14 is respectively connected with one end of the resistor R16, one end of the capacitor C23 and the pin 14 of the U1, and the other end of the resistor R16 and the other end of the capacitor C23 are grounded.
The drain electrode of the field effect transistor Q6 is respectively connected with the drain electrode of the field effect transistor Q3, the drain electrode of the field effect transistor Q2 and the drain electrode of the field effect transistor Q5, the grid electrode of the field effect transistor Q5 is respectively connected with one end of a resistor R47, one end of a resistor R49, the emitter electrode of an NPN triode VT7 and the emitter electrode of a PNP triode VT11 through a resistor R48, the other end of the resistor R47 is connected with the grid electrode of the field effect transistor Q2, the other end of the resistor R49 is respectively connected with the source electrode of the field effect transistor Q2, the source electrode of the field effect transistor Q5, the collector electrode of the triode VT11, the cathode electrode of a diode D21, the emitter electrode of the NPN triode VT9, one end of a resistor R54, the anode electrode of a diode D17, the cathode electrode of a capacitor C26, one end of a bidirectional transient suppression diode VP2 and the positive electrode of an AC/DC switching power supply, the base electrode of the triode VT11 is respectively connected with the base electrode of the triode VT7, one end of the triode VT9, the other end of the resistor R41 is respectively connected with the cathode of the triode VT7, the cathode of the diode D17, the anode of the capacitor C26, one end of the resistor R37 and one end of the resistor R43; the base electrode of the triode VT9 is respectively connected with the other end of the resistor R54 and one end of the resistor R23, and the other end of the resistor R23 is connected with the collector electrode of the triode VT2 through the reverse diode D13.
The second switch part comprises N-channel enhancement type field effect transistors Q10, Q12, Q9 and Q11, and forward zener diodes are connected between the source electrode and the drain electrode of the field effect transistor Q10, between the source electrode and the drain electrode of the field effect transistor Q12, between the source electrode and the drain electrode of the field effect transistor Q9 and between the source electrode and the drain electrode of the field effect transistor Q11.
The second charging path comprises a resistor R25, one end of the resistor R25 is connected with a collector of a triode VT17, the other end of the resistor R25 is connected with a base of an NPN triode VT18, an emitter of the triode VT18 is grounded, the collector of the triode VT18 is respectively connected with one end of a resistor R27 and a base of a PNP triode VT19 through a resistor R30, the emitter of the triode VT19 is respectively connected with the other end of the resistor R27, a power VCC, one end of a resistor R63 and a collector of the NPN triode VT24, the base of the triode VT24 is respectively connected with the other end of the resistor R63, the collector of the NPN triode VT21 and a base of the PNP triode VT25, the base of the triode VT21 is connected with a pin 30 of U1 through a resistor 61, the emitter of the triode VT21 is respectively connected with a ground wire, one end of the triode VT25 and one end of the resistor R68, the emitter of the triode VT25 is respectively connected with the emitter of the triode VT24, the other end of the resistor R68, one end of the resistor R69 and one end of the resistor R70, the other end of the resistor R69 is connected with a grid of a field effect transistor Q12, the other end of the resistor R70 is connected with a grid of a field effect transistor Q11, the source of the field effect transistor Q11 is respectively connected with the other end of the resistor Q12, and the source of the other end of the field effect transistor Q11 is connected with a cathode of a lithium-ion battery, and the second end of the resistor R71 is connected with the cathode of the lithium part.
The drain electrode of the field effect transistor Q11 is respectively connected with the drain electrode of the field effect transistor Q12, the drain electrode of the field effect transistor Q10 and the drain electrode of the field effect transistor Q9, the grid electrode of the field effect transistor Q10 is respectively connected with one end of a resistor R65, one end of a resistor R67, the emitter electrode of an NPN triode VT23 and the emitter electrode of a PNP triode VT22 through a resistor R66, the other end of the resistor R67 is connected with the grid electrode of the field effect transistor Q9, the other end of the resistor R65 is respectively connected with the source electrode of the field effect transistor Q10, the source electrode of the field effect transistor Q9, the collector electrode of the triode VT22, the emitter electrode of the NPN triode VT20, one end of a resistor R59, the anode electrode of a diode D28, the cathode electrode of a capacitor C27, one end of a bidirectional transient suppression diode VP3 and the positive electrode end of an AC/DC switching power supply output, the base electrode of the triode VT23 is respectively connected with the base electrode of the triode VT22, one end of the resistor R62, one end of the cathode of the resistor C27 is respectively connected with the triode VT23, the cathode of the diode D28, the anode of the capacitor C27, one end of the resistor R33, the other end is connected with the resistor R33, the other end is respectively, the other end is connected with the resistor R31, the other end is respectively, and the anode is connected with the cathode and the positive electrode of the diode D27; the base electrode of the triode VT20 is respectively connected with the other end of the resistor R59 and one end of the resistor R45, and the other end of the resistor R45 is connected with the collector electrode of the triode VT19 through the reverse diode D15.
As shown in fig. 4, 5 and 7, the PWM2 signal is common to both groups (charging first path, charging second path) and the MOS transistor circuits (Q3/Q6, Q11/Q12) it controls are equivalent to the total gate of charging, so long as it is turned off, no matter what PWM1 can be charged.
Q2/Q5 is opposite to Q9/Q10 in operation, as controlled by two signals of opposite phase.
The PWM1 is the main control signal, but because the storage batteries are divided into two groups and are respectively charged under one PWM signal, one control signal needs to be inverted by a triode.
The electricity generated by the solar cell panel is sent to a national power grid through a grid-connected inverter, and because the electricity consumption at night is low, the national power grid has a plurality of abandoned electricity, and most of the electricity is from a thermal power plant, wind energy, a nuclear power plant and the like. After eleven times of night, the mobile phone app can send a command to the dispatching system (the system is connected with wifi of a household) so as to close K2, and the wasted electric energy is stored in the lithium battery pack through the AC/DC direct current voltage-stabilizing switch power supply and the lithium battery charge-discharge controller.
When the electricity consumption in the daytime is high in the period of time, for example, 9-16 points, a command is sent to a dispatching system through a mobile phone app, a switch K1 is closed, the lithium battery pack supplies power to a national power grid through a grid-connected inverter, and a user can benefit from the electricity consumption due to the difference between the price of electricity discarding and the price of electricity generation. For example, the grid-tied inverter has a capacity of 8000W, and if the lithium battery is capable of delivering electricity for 4 hours, then it is 32 degrees. The more households the system is installed, the more obvious the benefits are, because the charging and discharging of the waste electricity can be uniformly controlled.
If the household power is also used in the daytime when the power consumption is high, the dual-power automatic transfer switch keeps a normal state, namely, the lithium battery pack is used for generating electric energy through the common inverter, when the power consumption is high at night, the automatic transfer switch can jump, and the power consumption is realized by jumping from the common zero line live wire to the standby zero line live wire, so that seamless power switching is realized, and the household power is supplied.
It should be understood that the foregoing detailed description of the present invention is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention may be modified or substituted for the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.

Claims (2)

1. The household photovoltaic high-efficiency energy storage power supply equipment comprises a grid-connected inverter, an AC/DC switching power supply, a lithium battery charge-discharge controller, a lithium battery pack, a DC/AC inverter, a double-power automatic conversion switch, a scheduling system and a photovoltaic module, and is characterized in that an electric energy input port of the grid-connected inverter is respectively connected with an electric energy output port of the photovoltaic module and the lithium battery pack, the positive end of the lithium battery pack is connected with the electric energy positive input end of the grid-connected inverter through a forward diode, and the negative end of the lithium battery pack is connected with the electric energy negative input end of the grid-connected inverter through a normally open switch of a relay K1;
the power output end of the grid-connected inverter is respectively connected with the standby power input end of the power grid and the double-power automatic conversion switch and the power input end of the AC/DC switching power supply, the power input end N of the AC/DC switching power supply is connected with the power output end N of the grid-connected inverter through a normally open switch of a relay K2, and the power input end L of the AC/DC switching power supply is connected with the power output end L of the grid-connected inverter; the control output port of the dispatching system is respectively connected with the control input port of the relay K1 and the control input port of the relay K2;
the electric energy output end of the AC/DC switching power supply is connected with a lithium battery pack through a lithium battery charge-discharge controller, the lithium battery pack is connected with the electric energy input end of a DC/AC inverter, the electric energy output end of the DC/AC inverter is connected with the common electric energy input end of a dual-power automatic transfer switch, and the load terminal of the dual-power automatic transfer switch is connected with a household main electric brake;
the lithium battery charging and discharging controller comprises a charging signal control part, a signal inverting part, a first charging path, a second charging path, a first switching part and a second switching part, wherein the lithium battery pack comprises a first lithium battery part and a second lithium battery part, a control signal output port of the charging signal control part is respectively connected with a control signal input port of the first charging path and a control signal input port of the signal inverting part, and a control signal output port of the signal inverting part is connected with a control signal input port of the second charging path;
the control signal output port of the first path of charging is connected with the control signal input port of the first switch part, the electric energy input end of the first switch part is connected with the output positive end of the AC/DC switch power supply, the electric energy output end of the first switch part is respectively connected with the negative end of the first lithium battery part and the cathode of the diode D25, the anode of the diode D25 is grounded, the anode end of the first lithium battery part is respectively connected with the output negative end of the AC/DC switch power supply and the positive end of the lithium battery pack, and the negative end of the lithium battery pack is grounded;
the control signal output port of the second charging path is connected with the control signal input port of the second switching part, the electric energy input end of the second switching part is connected with the output positive end of the AC/DC switching power supply, the electric energy output end of the second switching part is respectively connected with the negative end of the second lithium battery part and the cathode of the diode D26, the anode of the diode D26 is grounded, and the anode end of the second lithium battery part is respectively connected with the output negative end of the AC/DC switching power supply and the positive end of the lithium battery pack;
the charging signal control part comprises an STM32F103C8T6 chip U1, the 10 pins of the U1 are grounded through a resistor R76 and an address setting connector P3 in sequence, the 13 pin of the U1 is respectively connected with one end of a capacitor C9 and the 1 pin of an infrared receiving connector P2, the other end of the capacitor C9 is respectively connected with the ground wire, the 2 pin of the infrared receiving connector P2 and one end of a capacitor C8, and the other end of the capacitor C8 is respectively connected with the 3 pin of the infrared receiving connector P2 and a 3.3V power supply; the pin 14 of U1 is connected with 3.3V power supply through the forward diode D7, the pin 15 of U1 is connected with 3.3V power supply through the forward diode D6, the pin 16 of U1 is connected with 3.3V power supply through the forward diode D5, and the pin 17 of U1 is connected with 3.3V power supply through the forward diode D4;
the U1 pin 5 is respectively connected with one end of a capacitor C12 and one end of a crystal oscillator G1, the other end of the crystal oscillator G1 is respectively connected with the U1 pin 6 and one end of a capacitor C13, the other end of the capacitor C13 is respectively connected with the other end of the capacitor C12, the ground wire and the 1 pin of a MAX812 chip D14 through a resistor R11, the D14 pin 4 is connected with a 3.3V power supply, the D14 pin 2 is connected with the U1 pin 7 through a resistor R15, the U1 pin 24 is respectively connected with one end of an inductor L1, the U1 pin 36, the U1 pin 48, one end of an inductor L2, one end of a capacitor C14, one end of a capacitor C15 and one end of a capacitor C17, the other end of the inductor L1 is connected with the 3.3V power supply, and the other end of the inductor L2 is respectively connected with one end of a capacitor C16, one end of a capacitor C18 and the U1 pin 9, the other end of a capacitor C14, the other end of a capacitor C17 and the other end of the capacitor C16 are grounded;
the pin 18 of the U1 is respectively connected with the cathode of the diode D24, one end of the resistor R75, one end of the capacitor C33 and one end of the resistor R74, and the anode of the diode D24, the other end of the resistor R75 and the other end of the capacitor C33 are grounded; the other end of the resistor R74 is respectively connected with the positive electrode of the lithium battery pack and the positive electrode of the diode D3, the negative electrode of the diode D3 is respectively connected with the positive electrode of the capacitor C4, one end of the capacitor C5, the 3 pin of the HT7550-5 chip D1-1 and the 3 pin of the HT7550-5 chip D1, the negative electrode of the capacitor C4 and the other end of the capacitor C5 are grounded, the 1 pin of the D1-1 is respectively connected with the 1 pin of the D1, the negative electrode of the voltage stabilizing diode D10, one end of the resistor R1 and the positive electrode of the capacitor C7, the positive electrode of the voltage stabilizing diode D10 and the negative electrode of the capacitor C7 are grounded, the other end of the resistor R1 is respectively connected with the 2 pin of the D1, the 2 pin of the D1-1, one end of the bidirectional transient suppression diode 1, one end of the capacitor C6, one end of the capacitor C2, the power supply and the 3 pin of the 1117MPX-3.3 chip D2, the other end of the bidirectional transient suppression diode VP1, the negative electrode of the capacitor C6 and the 1 pin of the capacitor C2 are grounded, and the positive electrode of the capacitor 2 is respectively connected with the 3.3V power supply, C1 and the other end of the capacitor C3 and the capacitor VCC 3;
the dispatching system comprises an STC89C52 MCU, wherein a pin 40 of the MCU is respectively connected with one end of a first resistor and one end of a second resistor, the other end of the first resistor is connected with the positive electrode of the input end of a first PC817 chip, the negative electrode of the input end of the first PC817 chip is connected with the pin 32 of the MCU, the collector electrode of the output end of the first PC817 chip is connected with the base electrode of a PNP triode Q1, the emitter electrode of the triode Q1 is respectively connected with one end of a control input port of a relay K1 and the anode of a first diode, the cathode of the first diode is respectively connected with the other end of the control input port of the relay K1 and a 5V power supply, and the collector electrode of the triode Q1 and the emitter electrode of the output end of the first PC817 chip are grounded;
the other end of the second resistor is connected with the positive electrode of the input end of a second PC817 chip, the negative electrode of the input end of the second PC817 chip is connected with the pin 22 of the MCU, the collector electrode of the output end of the second PC817 chip is connected with the base electrode of a PNP triode Q2, the emitter electrode of the triode Q2 is respectively connected with one end of the control input port of the relay K2 and the anode of a second diode, the cathode of the second diode is respectively connected with the other end of the control input port of the relay K2 and a 5V power supply, and the collector electrode of the triode Q2 and the emitter electrode of the output end of the second PC817 chip are grounded;
the signal inverting part comprises an NPN triode VT17, the base electrode of the triode VT17 is connected with a pin 45 of U1 through a resistor R17, the emitter electrode of the triode VT17 is grounded, and the collector electrode of the triode VT17 is connected with a power supply VCC through a resistor R21;
the first switch part comprises N-channel enhancement type field effect transistors Q2, Q3, Q5 and Q6, and forward zener diodes are connected between the source electrode and the drain electrode of the field effect transistor Q2, between the source electrode and the drain electrode of the field effect transistor Q3, between the source electrode and the drain electrode of the field effect transistor Q5 and between the source electrode and the drain electrode of the field effect transistor Q6;
the first path of charging comprises a resistor R35, one end of the resistor R35 is connected with a pin 45 of U1, the other end of the resistor R35 is connected with a base electrode of an NPN triode VT5, an emitter electrode of the triode VT5 is grounded, the collector electrode of the triode VT5 is respectively connected with one end of a resistor R18 and a base electrode of a PNP triode VT2 through a resistor R22, the emitter electrode of the triode VT2 is respectively connected with the other end of the resistor R18, a power VCC, one end of a resistor R19 and a collector electrode of the NPN triode VT1, the base electrode of the triode VT1 is respectively connected with the other end of the resistor R19, the collector electrode of the NPN triode VT3 and a base electrode of a PNP triode VT4, the base electrode of the triode VT3 is respectively connected with a ground wire, the collector electrode of the triode VT4 and one end of the resistor R36, the emitter electrode of the triode VT4 is respectively connected with the emitter electrode of the triode VT1, the other end of the resistor R36, one end of the resistor R50 and one end of the resistor R51, the other end of the resistor R50 is respectively connected with a grid electrode of a field effect transistor Q3, the other end of the resistor R51 is connected with a grid electrode of a field effect transistor Q6, the other end of the resistor R51 is respectively connected with a source electrode of the field effect transistor Q6, and the anode of the field effect transistor Q6 is respectively connected with one end of a resistor R55, a resistor R55 and one end of a capacitor, a capacitor and one end of a capacitor is respectively connected with one end of a resistor and one end of a capacitor is connected with the resistor and one end of the resistor is a capacitor is connected with the end 28; the cathode of the diode D20 is respectively connected with one end of a resistor R52, one end of a C28, one end of a resistor R44 and one end of a resistor R8, the other end of the resistor R44 is respectively connected with one end of a resistor R42 and the anode of the diode D21, and the other end of the resistor R42 is connected with the positive electrode end of the first lithium battery part;
the drain electrode of the field effect transistor Q6 is respectively connected with the drain electrode of the field effect transistor Q3, the drain electrode of the field effect transistor Q2 and the drain electrode of the field effect transistor Q5, the grid electrode of the field effect transistor Q5 is respectively connected with one end of a resistor R47, one end of a resistor R49, the emitter electrode of an NPN triode VT7 and the emitter electrode of a PNP triode VT11 through a resistor R48, the other end of the resistor R47 is connected with the grid electrode of the field effect transistor Q2, the other end of the resistor R49 is respectively connected with the source electrode of the field effect transistor Q2, the source electrode of the field effect transistor Q5, the collector electrode of the triode VT11, the cathode electrode of a diode D21, the emitter electrode of the NPN triode VT9, one end of a resistor R54, the anode electrode of a diode D17, the cathode electrode of a capacitor C26, one end of a bidirectional transient suppression diode VP2 and the positive electrode of an AC/DC switching power supply, the base electrode of the triode VT11 is respectively connected with the base electrode of the triode VT7, one end of the triode VT9, the other end of the resistor R41 is respectively connected with the cathode of the triode VT7, the cathode of the diode D17, the anode of the capacitor C26, one end of the resistor R37 and one end of the resistor R43; the base electrode of the triode VT9 is respectively connected with the other end of the resistor R54 and one end of the resistor R23, and the other end of the resistor R23 is connected with the collector electrode of the triode VT2 through the reverse diode D13;
the second charging path comprises a resistor R25, one end of the resistor R25 is connected with a collector of a triode VT17, the other end of the resistor R25 is connected with a base of an NPN triode VT18, an emitter of the triode VT18 is grounded, the collector of the triode VT18 is respectively connected with one end of a resistor R27 and a base of a PNP triode VT19 through a resistor R30, the emitter of the triode VT19 is respectively connected with the other end of the resistor R27, a power VCC, one end of a resistor R63 and a collector of the NPN triode VT24, the base of the triode VT24 is respectively connected with the other end of the resistor R63, the collector of the NPN triode VT21 and a base of the PNP triode VT25, the base of the triode VT21 is connected with a pin 30 of U1 through a resistor 61, the emitter of the triode VT21 is respectively connected with a ground wire, one end of the triode VT25 and one end of the resistor R68, the emitter of the triode VT25 is respectively connected with the emitter of the triode VT24, the other end of the resistor R68, one end of the resistor R69 and one end of the resistor R70, the other end of the resistor R69 is connected with a grid of a field effect transistor Q12, the other end of the resistor R70 is connected with a grid of a field effect transistor Q11, the source of the field effect transistor Q11 is respectively connected with the other end of the resistor Q12, and the other end of the cathode of the resistor Q71 is connected with a lithium-ion battery;
the drain electrode of the field effect transistor Q11 is respectively connected with the drain electrode of the field effect transistor Q12, the drain electrode of the field effect transistor Q10 and the drain electrode of the field effect transistor Q9, the grid electrode of the field effect transistor Q10 is respectively connected with one end of a resistor R65, one end of a resistor R67, the emitter electrode of an NPN triode VT23 and the emitter electrode of a PNP triode VT22 through a resistor R66, the other end of the resistor R67 is connected with the grid electrode of the field effect transistor Q9, the other end of the resistor R65 is respectively connected with the source electrode of the field effect transistor Q10, the source electrode of the field effect transistor Q9, the collector electrode of the triode VT22, the emitter electrode of the NPN triode VT20, one end of a resistor R59, the anode electrode of a diode D28, the cathode electrode of a capacitor C27, one end of a bidirectional transient suppression diode VP3 and the positive electrode end of an AC/DC switching power supply output, the base electrode of the triode VT23 is respectively connected with the base electrode of the triode VT22, one end of the resistor R62, one end of the cathode of the resistor C27 is respectively connected with the triode VT23, the cathode of the diode D28, the anode of the capacitor C27, one end of the resistor R33, the other end is connected with the resistor R33, the other end is respectively, the other end is connected with the resistor R31, the other end is respectively, and the anode is connected with the cathode and the positive electrode of the diode D27; the base electrode of the triode VT20 is respectively connected with the other end of the resistor R59 and one end of the resistor R45, and the other end of the resistor R45 is connected with the collector electrode of the triode VT19 through the reverse diode D15.
2. The household photovoltaic high-efficiency energy storage power supply device according to claim 1, wherein the grid-connected inverter adopts an HP10000-148 type, the AC/DC switching power supply adopts an S-120-48 type switching power supply, the DC/AC inverter adopts a 48-500 type inverter, and the double-power automatic conversion switch adopts a GCQ2-63 type automatic conversion switch.
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