CN106059044A - Off-grid photovoltaic integrated machine - Google Patents

Off-grid photovoltaic integrated machine Download PDF

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Publication number
CN106059044A
CN106059044A CN201610571065.0A CN201610571065A CN106059044A CN 106059044 A CN106059044 A CN 106059044A CN 201610571065 A CN201610571065 A CN 201610571065A CN 106059044 A CN106059044 A CN 106059044A
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CN
China
Prior art keywords
module
control module
inversion
bridge
main control
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.)
Pending
Application number
CN201610571065.0A
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Chinese (zh)
Inventor
游黎威
谈扬宁
张权
刘建清
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.)
Zhejiang Yuesheng New Energy Technology Co Ltd
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Zhejiang Yuesheng New Energy Technology 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.)
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Publication date
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Priority to CN201610571065.0A priority Critical patent/CN106059044A/en
Publication of CN106059044A publication Critical patent/CN106059044A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33515Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53873Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Landscapes

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

Abstract

The invention discloses an off-grid photovoltaic integrated machine, which comprises a battery, a main control module, an inverter module, a step-up driving module, an inverter driving module, an inverter control module and a display module, wherein the charging end of the battery is connected with a photovoltaic module and a power grid respectively; the output end of the battery is connected with the power input end of the inverter module; the main control module is connected with a low-voltage side of the inverter module via the step-up driving module; the control end of the inverter control module is connected with a high-voltage side of the inverter module via the inverter driving module; the signal input end of the inverter control module is connected with the output voltage detection end and the output current detection end of the inverter module; and the main control module and the inverter control module are connected via an optocoupler communication module. The off-grid photovoltaic integrated machine has the advantages of simple structure, convenient use, low cost, high system efficiency, good stability, strong scalability, and perfect and reliable under voltage, over voltage, over load, short circuit, over temperature protection and alarming functions.

Description

A kind of off-network photovoltaic integrated machine
Technical field
The present invention relates to a kind of off-network photovoltaic integrated machine, belong to photovoltaic inversion field.
Background technology
In energy problem increasing today, solar energy, as one of current optimal environmental protection new forms of energy, has obtained More and more pay close attention to the mankind and apply, and photovoltaic DC-to-AC converter is indispensable link in whole solar power system.
Traditional off-network inverter control system is various due to number of elements, causes input cost big, and debugging process is complicated, And reduce efficiency and the stability of system.Intelligent, the motility of simultaneity factor, expansibility are relatively low.
In view of this, this is studied by the present inventor, develops a kind of off-network photovoltaic integrated machine specially, and this case is thus produced Raw.
Summary of the invention
It is an object of the invention to provide a kind of off-network photovoltaic integrated machine, have simple in construction, easy to use, with low cost, The features such as good stability, extensibility are strong.
To achieve these goals, the solution of the present invention is:
A kind of off-network photovoltaic integrated machine, drives module, inversion to drive mould including accumulator, main control module, inversion module, boosting Block, inversion control module and display module, wherein, the charging end of described accumulator is electrically connected with photovoltaic module, city respectively, electric power storage The outfan in pond is connected with the power input of inversion module, and described main control module drives module and inversion module by boosting Low-pressure side is connected, and the end that controls of described inversion control module drives module to be connected with the high-pressure side of inversion module by inversion, inverse The signal input part becoming control module is connected with output voltage test side and the output electric current measure end of inversion module, described master control Module is connected by optocoupler communication module with inversion control module, and described display module is connected with main control module.
As preferably, described main control module is connected with alarm module, 485 communication modules further.
As preferably, described display module uses 12864 lattice lcds, and 2 USB power source with 1A/5V, 2A/5V connect Mouthful, in order to mobile phone, flat board charging.
As preferably, described main control module uses microprocessor to control.
As preferably, described inversion control module uses digital processing chip.
As preferably, a MOS full-bridge that described inversion module includes being sequentially connected, high frequency transformer, rectifier bridge, second MOS full-bridge, inductance and filter capacitor, the low-pressure side of high frequency transformer is connected with accumulator, the low-voltage DC of accumulator output Boosting obtain the high-tension electricity of band square wave through a MOS full-bridge modulation, high frequency transformer, the high-tension electricity of band square wave is through rectifier bridge Export 220V alternating current after rectification, the 2nd MOS full-bridge modulation, then obtain stable 220V after sequentially passing through inductance and filter capacitor Alternating current;Described main control module drives module to be connected with a MOS full-bridge by boosting, each for controlling in a MOS full-bridge The conducting of individual metal-oxide-semiconductor and cut-off, and then the voltage of the low-pressure side of modulation high frequency transformer, the control end of described inversion control module Module is driven to be connected with the 2nd MOS full-bridge by inversion, for controlling conducting and the cut-off of each metal-oxide-semiconductor in the 2nd MOS full-bridge, And then the high-tension electricity after modulation rectification.
As preferably, described optocoupler communication module includes two optocouplers, for main control module and inversion control module every From communication, prevent the affected by high main control module of inversion control module.
Above-mentioned off-network photovoltaic integrated machine operation principle: use solar photovoltaic assembly in MPPT mode, accumulator to be filled Electricity, utilizes photovoltaic module power supply to greatest extent;The commercial power charged interface of standby 220V, can be to electric power storage in sunlight deficiency or night Charge in pond.Battery feed output is reverse into 220VAC power supply by inversion module boosting, powers to AC load, fills at USB On electricity mouth, more it is configured with 1A and 2A two ways, user-friendly.Inversion control module uses digital processing chip, Can be used to quickly realize various Digital Signal Processing, thus ensure that the 220VAC that inversion exports is stable, pure, there is soft opening Dynamic function, it is to avoid the impact to load, interference.Whole off-network photovoltaic integrated machine simple in construction, easy to use, with low cost, be System efficiency height, good stability, extensibility are strong;Have perfect, the most under-voltage, overvoltage, overload, short circuit, overheat protector and report Alert function.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the off-network photovoltaic integrated machine module frame chart of the present embodiment;
Fig. 2 is the off-network photovoltaic integrated machine inversion module schematic diagram of the present embodiment.
Detailed description of the invention
As it is shown in figure 1, a kind of off-network photovoltaic integrated machine, drive including accumulator 1, main control module 2, inversion module 3, boosting Module 4, inversion drive module 5 and inversion control module 6, wherein, the charging end of described accumulator 1 respectively with photovoltaic module 7, electricity Net 8 is connected, and photovoltaic module 7, electrical network 8 can simultaneously or respectively accumulator 1 is charged, in the present embodiment, and described accumulator 1 The unidirectional current of output 12V.The outfan of accumulator 1 is connected with the power input of inversion module 3, and described main control module 2 passes through Boosting drives module 4 to be connected with the low-pressure side of inversion module 3, and the control end of described inversion control module 6 drives mould by inversion Block 5 is connected with the high-pressure side of inversion module 3, and the signal input part of inversion control module 6 detects with the output voltage of inversion module 3 End is connected with output electric current measure end, utilizes voltage and current double-loop control, and SPWM uses bipolarity, thus obtains purer Sine wave.Described main control module 2 is connected by optocoupler communication module 9 with inversion control module 6.Described main control module 1 uses Microprocessor controls, the microprocessor that specifically model can be used to be STM32F103, utilizes the Voltage Feedback of accumulator 1 to come smart Really control charging modes.
Described inversion control module 6 uses digital processing chip, and specifically can use model is at the numeral of DSPIC33F Reason chip.DsPIC33F series is high-performance 16 position digital signal controller, internal employing program and data separate Harvard knot Structure, has special hardware multiplier, uses pile line operation, it is provided that special DSP instruction.
In the present embodiment, described main control module 2 further with display module 10, alarm module 11 and 485 communication module 12 are connected.Wherein, display module 10 uses 12864 lattice lcds, has 2 USB power source interfaces of 1A/5V, 2A/5V, in order to To mobile phone, flat board charging;Liquid crystal is used for showing current accumulator 1 electricity, and battery tension, photovoltaic panel charged state, PV charge Electric current, exchanges the information such as output state, device failure alert;Alarm module 11 uses LED instruction and buzzer warning, is used for storing Battery 1 power shortage is reported to the police, instruction inversion output state, AC charged state, photovoltaic charged state;485 communication modules 12 for Position machine carries out telecommunication.
As in figure 2 it is shown, described inversion module 3 include being sequentially connected a MOS full-bridge, high frequency transformer T1, rectifier bridge D, the 2nd MOS full-bridge, inductance L and filter capacitor C, wherein, a described MOS full-bridge includes 4 metal-oxide-semiconductor Q1 ~ Q4, is divided into 2 groups Metal-oxide-semiconductor group parallel with one another, each metal-oxide-semiconductor group all includes 2 metal-oxide-semiconductors being serially connected, the metal-oxide-semiconductor G often organized the most all with boosting Drive module 4 to be connected, drive module 4 to control conducting and the cut-off of metal-oxide-semiconductor Q1 ~ Q4 by boosting, and then improve high frequency transformer T1 output end voltage, is rectified into high-voltage dc voltage by rectifier bridge D.Described 2nd MOS full-bridge also include 4 metal-oxide-semiconductor S1 ~ S4, the G of metal-oxide-semiconductor S1 ~ S4 the most all drive module 5 to be connected with inversion, control in the 2nd MOS full-bridge 4 by inversion driving module 5 The conducting of metal-oxide-semiconductor S1 ~ S4 and cut-off, and then high voltage direct current modulation rectification alternating current power supply.Described high frequency transformer T1's is low Pressure side is connected with accumulator 1, and the 12V low-voltage DC of accumulator 1 output is through a MOS full-bridge modulation, high frequency transformer T1 Obtaining the high-tension electricity of band square wave after boosting, the high-tension electricity of band square wave exports after rectifier bridge D rectification, the 2nd MOS full-bridge modulation 220V alternating current, 220V alternating current obtains stable 220V alternating current after sequentially passing through inductance L and filter capacitor C again;Described master Controlling module 2 drives module 3 to be connected with a MOS full-bridge by boosting, and in control the oneth MOS full-bridge, each metal-oxide-semiconductor leads Lead to and cut-off;The control end of described inversion control module 6 drives module 5 to be connected with the 2nd MOS full-bridge by inversion.
In the present embodiment, described optocoupler communication module 9 includes two optocouplers, for main control module 2 and inversion control mould Block 6 isolates communication.Because main control module 2 is low-pressure section, inversion control module 6 is high-pressure section, high-pressure section and low voltage section Divide the exchange carrying out information through light-coupled isolation serial communication, both can ensure that real-time, and also can guarantee that safety.
Above-mentioned off-network photovoltaic integrated machine operation principle: use solar photovoltaic assembly 7 in MPPT mode to 12V accumulator 1 Charging, utilizes photovoltaic module power supply to greatest extent;Standby 220VAC grid charging interface, or night not enough at sunlight is to electric power storage Charge in pond 1.The output of 12V accumulator 1 power supply is reverse into 220VAC power supply by inversion module 3 boosting, powers to AC load, In USB charge port, more it is configured with 1A and 2A two ways, user-friendly.Inversion control module 6 uses digital processing Chip, can be used to quickly realize various Digital Signal Processing, thus ensures that the 220VAC that inversion exports is stable, pure, tool There is soft start function, it is to avoid the impact to load, interference.
Above-described embodiment and the product form of the graphic and non-limiting present invention and style, any art common Technical staff is suitably changed what it did or modifies, and all should be regarded as the patent category without departing from the present invention.

Claims (7)

1. an off-network photovoltaic integrated machine, it is characterised in that: include that accumulator, main control module, inversion module, boosting drive mould Block, inversion drive module, inversion control module and display module, wherein, the charging end of described accumulator respectively with photovoltaic module, City is electrically connected, and the outfan of accumulator is connected with the power input of inversion module, and described main control module drives mould by boosting Block is connected with the low-pressure side of inversion module, and the end that controls of described inversion control module drives module and inversion module by inversion High-pressure side is connected, the signal input part of inversion control module and the output voltage test side of inversion module and output electric current measure end Being connected, described main control module is connected by optocoupler communication module with inversion control module, described display module and main control module phase Even.
2. as claimed in claim 1 a kind of off-network photovoltaic integrated machine, it is characterised in that: described main control module further with report Alert module is connected with 485 communication modules.
3. a kind of off-network photovoltaic integrated machine, it is characterised in that: described display module uses 12864 Lattice lcd, has the USB power source interface of 2 1A/5V.
4. a kind of off-network photovoltaic integrated machine, it is characterised in that: described main control module uses micro-process Device controls.
5. a kind of off-network photovoltaic integrated machine, it is characterised in that: described inversion control module uses number Word processing chip.
6. a kind of off-network photovoltaic integrated machine, it is characterised in that: described inversion module includes phase successively A MOS full-bridge, high frequency transformer, rectifier bridge, the 2nd MOS full-bridge, inductance and filter capacitor even, the low pressure of high frequency transformer Side is connected with accumulator, and the low-voltage DC of accumulator output is carried through a MOS full-bridge modulation, high frequency transformer boosting The high-tension electricity of square wave, the high-tension electricity of band square wave exports 220V alternating current after rectifier bridge rectification, the 2nd MOS full-bridge modulation, then Stable 220V alternating current is obtained after sequentially passing through inductance and filter capacitor;Described main control module drives module and the by boosting One MOS full-bridge is connected, for controlling conducting and the cut-off of each metal-oxide-semiconductor in a MOS full-bridge, and then modulation high frequency transformer The voltage of low-pressure side, the control end of described inversion control module drives module to be connected with the 2nd MOS full-bridge by inversion, is used for controlling Make the high-tension electricity after the conducting of each metal-oxide-semiconductor in the 2nd MOS full-bridge and cut-off, and then modulation rectification.
7. a kind of off-network photovoltaic integrated machine, it is characterised in that: described optocoupler communication module includes two Individual optocoupler, for the isolation of main control module Yu inversion control module.
CN201610571065.0A 2016-07-20 2016-07-20 Off-grid photovoltaic integrated machine Pending CN106059044A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107093886A (en) * 2017-06-27 2017-08-25 合肥尚硕新能源有限公司 It is a kind of to be embedded in solar powered network from the voltage security power supply circuit become in device
CN107294199A (en) * 2017-06-27 2017-10-24 合肥尚硕新能源有限公司 A kind of compound voltage detecting switching circuit of logic
CN107317351A (en) * 2017-04-21 2017-11-03 句容市宝启电子科技有限公司 A kind of distributed generation system with circuit protection

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JP2008263695A (en) * 2007-04-11 2008-10-30 Matsushita Electric Ind Co Ltd Inverter circuit
CN201577044U (en) * 2009-09-03 2010-09-08 中国电子科技集团公司第十四研究所 High-frequency isolated-type photovoltaic charging control inverter
CN102946206A (en) * 2012-11-16 2013-02-27 中科恒源科技股份有限公司 High-frequency isolating type inverse control integrated machine
CN203387430U (en) * 2013-07-25 2014-01-08 天津大学 Micro photovoltaic grid connected inverter for optimization of direct current bus capacitor
CN104578136A (en) * 2013-10-27 2015-04-29 西安中科麦特电子技术设备有限公司 Household photovoltaic power generation system
CN205882822U (en) * 2016-07-20 2017-01-11 浙江悦昇新能源科技有限公司 From net photovoltaic all -in -one

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Publication number Priority date Publication date Assignee Title
JP2008263695A (en) * 2007-04-11 2008-10-30 Matsushita Electric Ind Co Ltd Inverter circuit
CN201577044U (en) * 2009-09-03 2010-09-08 中国电子科技集团公司第十四研究所 High-frequency isolated-type photovoltaic charging control inverter
CN102946206A (en) * 2012-11-16 2013-02-27 中科恒源科技股份有限公司 High-frequency isolating type inverse control integrated machine
CN203387430U (en) * 2013-07-25 2014-01-08 天津大学 Micro photovoltaic grid connected inverter for optimization of direct current bus capacitor
CN104578136A (en) * 2013-10-27 2015-04-29 西安中科麦特电子技术设备有限公司 Household photovoltaic power generation system
CN205882822U (en) * 2016-07-20 2017-01-11 浙江悦昇新能源科技有限公司 From net photovoltaic all -in -one

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107317351A (en) * 2017-04-21 2017-11-03 句容市宝启电子科技有限公司 A kind of distributed generation system with circuit protection
CN107093886A (en) * 2017-06-27 2017-08-25 合肥尚硕新能源有限公司 It is a kind of to be embedded in solar powered network from the voltage security power supply circuit become in device
CN107294199A (en) * 2017-06-27 2017-10-24 合肥尚硕新能源有限公司 A kind of compound voltage detecting switching circuit of logic

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Application publication date: 20161026