CN107317386A - Soil moisture content monitoring system energy supply based on wind light mutual complementing - Google Patents
Soil moisture content monitoring system energy supply based on wind light mutual complementing Download PDFInfo
- Publication number
- CN107317386A CN107317386A CN201710475404.XA CN201710475404A CN107317386A CN 107317386 A CN107317386 A CN 107317386A CN 201710475404 A CN201710475404 A CN 201710475404A CN 107317386 A CN107317386 A CN 107317386A
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- China
- Prior art keywords
- voltage
- lithium battery
- energy
- output
- control circuit
- 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.)
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- 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
-
- 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
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
A kind of energy supplying system for soil moisture content sensor, for conventional soil soil moisture content sensor energy supplying system charge difficult, short circulating battery service life and low security the problem of, invented a kind of electric power system.The system is energized using wind light mutual complementing characteristic, using super capacitor and lithium battery group into two-stage energy stores.When dc bus has voltage output, selection DC bus-bar voltage output is as input voltage, while giving super capacitor charging；When DC bus-bar voltage is without output, selection super capacitor output is used as input voltage；When dc bus and super capacitor without output when, and lithium battery charge state be more than or equal to 20% when selection lithium battery output be used as input voltage.Electric power system is by estimating that battery SOC and SOH ensure the safety and reliability of charging control circuit and charge/discharge control circuit.The problem of present invention preferably solves difficult soil moisture content sensor energy supplying system charging, short battery service life cycle and low security.
Description
Technical field
The present invention relates to soil moisture content sensor field, more particularly, to one kind using solar energy and wind energy as energy
Amount source, the electric power system energized using super capacitor as prime energy storage and with reference to lithium battery as standby.
Background technology
In soil moisture content sensor field, the wide variety of soil moisture sensor of in the market be mostly using probe-type as
Main, such sensor can only survey surface soil moisture, and probe will be directly contacted, it is necessary to which human assistance is measured with soil.
With the raising of the gentle wireless communication of Automated water, and the problems such as remote farming region energy supply is difficult, surround
Low-power consumption, convenience, permanence and the stability problem in energy source of soil moisture content sensing system, soil moisture content sensing
The exploitation of device system is also more and more intelligent, wherein intelligent tubular soil moisture sensor device technology just gradually starts to occur.
Intelligent tubular soil moisture sensor device is generally used for remote agricultural region, and there region is wider, directly
It is that soil moisture content sensing system is powered with civil power very difficult, supply line's laying difficulty is big, and labor intensive and material resources.
And when being powered using battery, due to the limitation of battery storage energy, it is therefore desirable to periodically battery is taken out by manpower
Battery is changed in charging, the maintenance cost of system is thus considerably increased, for needing a large amount of soil moisture content sensing systems
Broad regions it is more difficult.Therefore, how the energy is obtained in the regional environment applied by soil moisture content sensing system
And effectively handled and applied, sustainable continuous electric energy is provided for whole soil moisture content sensing system, is to grind instantly
The emphasis studied carefully.Therefore, the expert and scholar of many association areas are directed to the research and development of soil moisture content sensor energy supplying system, so
The application of intelligent tubular soil moisture sensor device above will be more convenient, while also can adapt to more complicated and remote
Agricultural region environment.
The content of the invention
The present invention solves that the charging of soil moisture content sensor energy supplying system is difficult, battery service life cycle is short and safe
Property low present situation, it is that energy is originated using solar energy and wind energy to describe a kind of, is prime energy storage and electric with reference to lithium using super capacitor
The electric power system that pond is energized as standby.The system is using solar energy and wind energy as energy source, solar panel and blower fan difference
Solar energy and wind energy are gathered, is originated as all energy of soil moisture content sensing system.When solar energy or sufficient wind energy, relay
The selection DC bus-bar voltage output of device module I converts mu balanced circuit input voltage as DC/DC and super capacitor is charged,
Charging control circuit judges whether lithium battery charge state is less than 20% and SOH and is not less than 70% simultaneously, is that lithium battery power supply is stayed
Have enough electricity surpluses, less than when, directly select dc bus output voltage by charging control circuit to lithium battery carry out
Charging；Not less than when, charging control circuit does not charge to lithium battery, remove lithium cell charging frequency.Solar energy and
Wind energy is simultaneously not enough or without and produce can not convert mu balanced circuit for DC/DC enough voltage or power is provided when, relay
Module I disconnects, and the input that the output voltage that relay module II is switched to super capacitor converts mu balanced circuit as DC/DC is electric
Pressure.Solar energy and wind energy not enough and super capacitor storage simultaneously energy all can not convert mu balanced circuit for DC/DC and provide enough
When voltage or power, relay module I and II disconnect, and relay module III is switched to lithium battery and made by charge/discharge control circuit
The input voltage of mu balanced circuit is converted for DC/DC, when the SOC of lithium battery is less than 5%, depending on not enough power supply, stops electric discharge.Entirely
The output voltage of electric power system is provided by DC/DC conversion mu balanced circuits, and the input voltage then basis of DC/DC conversion mu balanced circuits
Relay module I, II and III are correspondingly selected.
Originated according to of the present invention using solar energy and wind energy as energy, so that super capacitor is prime energy storage and combines lithium electricity
The charging control circuit for the electric power system that pond is energized as standby, it is characterised in that with special lithium ion/lighium polymer in parallel
Battery charger system chip LTC4070 is core, using transistor VT1 as the control loop to lithium cell charging, with micro- place
Manage device STM32 I/O mouth control relay coil break-make transistors VT1 base loop.Transistor VT1 is series at input voltage
Between positive pole and lithium battery anode, by controlling the charging and disconnection of VT1 conducting and cut-off control to lithium battery to charge.Micro- place
Device STM32 I/O mouth control relay coils are managed, the relay is serially connected between VT1 and input voltage, is for control selections
No conducting charge circuit.
Originated according to of the present invention using solar energy and wind energy as energy, so that super capacitor is prime energy storage and combines lithium electricity
The charge/discharge control circuit for the electric power system that pond is energized as standby, it is characterised in that charge/discharge control circuit is detected with battery terminal voltage
Chip CN301 come judge handle lithium battery discharge voltage, the battery terminal voltage detected less than set threshold voltage when,
CN301 LBO mouths output low level, otherwise output high level.Simultaneously by judging the SOC value size of lithium battery, when SOC is not low
When 5%, I/O mouthfuls of output high level, on the contrary output low level.With the corresponding height electricity of microprocessor STM32 I/O mouths output
The low and high level that flat LBO mouths with CN301 chips is exported pass through with door output logic control signal, when judging that SOC value is not less than
5% and battery terminal voltage not less than setting threshold value when, logic control part with door export high level, the logic control signal
The adhesive for the relay being connected in lithium battery anode voltage output lines is controlled by control relay control module and is broken
Open, so as to switch on and off discharge loop, prevent its over-discharge, play a part of protecting lithium battery.
Brief description of the drawings
Fig. 1 is a kind of solar energy energy supplying system structural representation combined based on super capacitor with lithium battery of the present invention
Figure；
Fig. 2 is energy supplying system control flow chart of the present invention；
Fig. 3 is the charging control circuit structural representation of energy supplying system of the present invention；
Fig. 4 is the charge/discharge control circuit structural representation of energy supplying system of the present invention.
Embodiment
The present invention is described in detail by 1-4 below in conjunction with the accompanying drawings.
Accompanying drawing 1 is compareed, solar panel uses output voltage for 5V, 4.2V, output electricity are transformed to through Cuk converters II
Flow for 150mA, size is 95mm × 95mm single-crystalline-silicon solar-cell panel.Wind-driven generator selection three-phase permanent is with generating
Machine, and three-phase uncontrollable rectifier is connected to, 4.2V voltage parallels are exported on dc bus through Cuk converters.Mono-crystalline silicon solar
The output voltage of cell panel is connected with Cuk converters II, and is exported by Cuk converters II transformation voltage stabilizing to dc bus
On.The tunnel of dc bus output voltage Parallel opertation three, is connected directly to super capacitor (2) all the way, is its charging；It is connected to all the way
Charging control circuit (6), is that lithium battery (7) is charged；A-road-through crosses relay module I (3) and is connected to DC/DC conversion voltage stabilizings
The input of circuit (10).The output end of super capacitor (2) is connected to DC/DC by relay module II (4) and converts voltage stabilizing electricity
The input on road (10).The output of charging control circuit (6) is connected to lithium battery (7), and lithium battery (7) charging process is controlled
System.The output of lithium battery (7) is connected to DC/DC conversion voltage stabilizing electricity by charge/discharge control circuit (8) and relay module III (5)
The input on road (10).By detecting that the electric current and voltage of lithium battery estimate the SOC and SOH (9) of battery, it is ensured that lithium battery (7)
The security of charge and discharge process.The output voltage of whole electric power system is provided by DC/DC conversion mu balanced circuit (10) output ends, and
The input voltage of DC/DC conversion mu balanced circuits is then correspondingly selected according to relay module I (3), II (4) and III (5).
DC/DC conversion mu balanced circuits (10) for core, export 5V and 3.3V two-way voltages with LTC3537 chips (12).In addition, passing through inspection
The voltage and current estimation SOC and SOH of lithium battery is surveyed, and then to the control of charging control circuit (6) and charge/discharge control circuit (8)
Carry out correspondingly decision-making.
Compare in accompanying drawing 2, energy supplying system control, when DC bus-bar voltage, super capacitor (2) are without output, selection lithium electricity
Pond (7) converts mu balanced circuit input voltage (10) as energy source as DC/DC；DC bus-bar voltage is without output, super capacitor
(2) when having electricity and lithium battery (7) SOC more than 20%, it is defeated that selection super capacitor (2) converts mu balanced circuit (10) as DC/DC
Enter voltage, while cutting off the output loop of lithium battery (7)；When DC bus-bar voltage has output, on the one hand converted as DC/DC steady
Volt circuit input voltage (10), on the other hand for super capacitor (2) charge and be SOC below 20% when lithium battery (7) enter
Row charging.
Accompanying drawing 3 is compareed, the charging control circuit (6) of energy supplying system is on the control strategy to lithium cell charging, solar energy
During with wind energy abundance, relay module I (3) selection DC bus-bar voltage outputs are used as DC/DC to convert mu balanced circuit (10) and inputted
Voltage, at the same judge lithium battery (7) state-of-charge whether be less than 20% and lithium battery (7) SOH whether be more than 70%, SOC it is small
When 20% and SOH is more than 70%, charging control circuit (6) carries out trickle charge to lithium battery (7), and electricity is full of or direct current is female
After line Non voltage output, the relay coil (13) of STM32 I/O mouths (11) control, which disconnects, stops charging；When SOC is more than
20%th, when SOH is more than 70% and not under lithium battery trickle charge state, STM32 I/O mouths (11) output low level disconnects
Charge circuit, does not charge now to lithium battery.Charging control circuit (7) is with special lithium ion in parallel/lighium polymer electricity
Electrolytic battery charger System on Chip/SoC LTC4070 (12) is core, is returned using transistor VT1 (14) as the control charged to lithium battery (7)
Road, with microprocessor STM32 I/O mouths (11) control relay coil (13) break-make transistor VT1 (14) base loop.It is brilliant
Body pipe VT1 (14) is series between input voltage positive pole and lithium battery (7) positive pole, by the conducting and cut-off that control VT1 (14)
Control the charging to lithium battery and disconnect to charge.Microprocessor STM32 I/O mouths (11) control relay coil (13), should be after
Electrical equipment is serially connected between VT1 and input voltage, and whether charge circuit is turned on for control selections.
Compare accompanying drawing 4, the charge/discharge control circuit (8) of energy supplying system on control of discharge strategy, charge/discharge control circuit (8) with
Battery terminal voltage detection chip CN301 (18) come judge handle lithium battery (7) discharge voltage, the battery terminal voltage detected is with setting
The threshold voltage put compares, when discharge voltage is less than threshold voltage 3.6V, CN301 (18) LBO mouths output low level, otherwise defeated
Go out high level.Simultaneously by judging the SOC value size of lithium battery (7), when SOC is not less than 5%, I/O mouthfuls of output high level, instead
Output low level.The LBO of corresponding low and high level and CN301 chips (18) is exported with microprocessor STM32 I/O mouths (15)
The low and high level of mouthful output passes through exports logic control signal with door (19), when judging that SOC value is not less than 5% and battery terminal voltage
Not less than setting threshold value when, logic control part with door exports high level, and the logic control signal passes through control relay
Control module (20) controls the adhesive and disconnection of the relay (21) that are connected in lithium battery (7) cathode voltage outlet line,
So as to switch on and off discharge loop.
The preferable possible embodiments of the present invention are these are only, are not limited the scope of the invention, it is all with the present invention
The equivalent structure change that specification and accompanying drawing content are made, is all contained in protection scope of the present invention.
Claims (3)
1. a kind of energy supplying system for soil moisture content sensor, the energy supplying system includes time upper complementary honourable energy and adopted
Collection part (1), super capacitor (2), relay module I (3), relay module II (4), relay module III (5), with
LTC4070 chips are charging control circuit (6), the 1500mA of core, and output voltage is for 3.7V lithium battery (7), with CN301 cores
Piece and be the charge/discharge control circuit (8) of core with door, cell voltage current detecting, battery SOC and SOH state estimations (9), DC/
DC conversion mu balanced circuits (10), it is characterised in that solar panel and wind-driven generator collection natural environment energy, are used as soil
All energy source of earth soil moisture content sensing system.When solar energy or sufficient wind energy, relay module I (3) selection dc bus
Voltage output converts mu balanced circuit input voltage (10) as DC/DC and super capacitor (2) is charged, while charge control
Circuit (6) judge lithium battery (7) state-of-charge whether be less than 20%, less than when, directly select dc bus output voltage and pass through
Charging control circuit (6) charges to lithium battery (7)；Not less than when, charging control circuit (6) not to lithium battery (7) carry out
Charging.Solar energy and wind energy are simultaneously not enough or without and the enough electricity of mu balanced circuit (10) offer can not be converted for DC/DC by producing
When pressure or power, relay module I (3) disconnects, and relay module II (4) is switched to the output voltage conduct of super capacitor (2)
The input voltage of DC/DC conversion mu balanced circuits (10).Solar energy and wind energy not enough and super capacitor (2) storage simultaneously energy all without
When method is that DC/DC converts mu balanced circuit (10) offer enough voltage or power, relay module I (3) and II (4) disconnect, after
Electrical appliance module III (5) is switched to the input that lithium battery converts mu balanced circuit (10) by charge/discharge control circuit (8) as DC/DC
Voltage.The output voltage of whole electric power system converts mu balanced circuit (10) by DC/DC and provided, and DC/DC conversion mu balanced circuits
(10) input voltage is then correspondingly selected according to relay module I (3), II (4) and III (5).
2. it is as claimed in claim 1 with charging control circuit (6) of the LTC4070 chips (12) for core, it is characterised in that with
Special lithium ion in parallel/lithium polymer battery charger system chip LTC4070 (12) is core, with transistor VT1 (14)
It is logical with microprocessor STM32 I/O mouths (11) control relay coil (13) as the control loop charged to lithium battery (7)
Disconnected transistor VT1 (14) base loop.
3. as claimed in claim 1 with CN301 chips (18) and with the charge/discharge control circuit that door (19) is core, its feature exists
Judge to handle the threshold voltage of lithium battery electric discharge with battery terminal voltage detection chip CN301 (18) in charge/discharge control circuit, together
When by the SOC of lithium battery, with microprocessor STM32 I/O mouths (15) export corresponding low and high level and with CN301 chips (18)
LBO mouths output low and high level pass through with door (19) export logic control signal, the logic control signal is by controlling relay
Device control module (20) controls the adhesive and disconnection of the relay (21) that are connected in lithium battery anode voltage output lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710475404.XA CN107317386A (en) | 2017-06-21 | 2017-06-21 | Soil moisture content monitoring system energy supply based on wind light mutual complementing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710475404.XA CN107317386A (en) | 2017-06-21 | 2017-06-21 | Soil moisture content monitoring system energy supply based on wind light mutual complementing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107317386A true CN107317386A (en) | 2017-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710475404.XA Withdrawn CN107317386A (en) | 2017-06-21 | 2017-06-21 | Soil moisture content monitoring system energy supply based on wind light mutual complementing |
Country Status (1)
| Country | Link |
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| CN (1) | CN107317386A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884273A (en) * | 2019-03-07 | 2019-06-14 | 长春光华学院 | A kind of soil moisture content acquisition function monitoring device of low-power consumption |
| CN110957753A (en) * | 2018-09-27 | 2020-04-03 | 通用电气公司 | System and method for controlling an uninterruptible power supply for an electric power system |
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Application publication date: 20171103 |
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