CN207801554U - A kind of photovoltaic charged control system - Google Patents
A kind of photovoltaic charged control system Download PDFInfo
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- CN207801554U CN207801554U CN201721878516.1U CN201721878516U CN207801554U CN 207801554 U CN207801554 U CN 207801554U CN 201721878516 U CN201721878516 U CN 201721878516U CN 207801554 U CN207801554 U CN 207801554U
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- accumulator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Selective Calling Equipment (AREA)
Abstract
The utility model provides a kind of photovoltaic charged control system, including control unit, charhing unit, sampling unit, key-press input unit, display unit, storage unit and RS485 communication units.The utility model combination sensor and single-chip microcomputer control technology take corresponding charging modes by judging the charged state of accumulator; to adapt to the accumulator of different capabilities, can it is stable to accumulator, reliably charge, enhance the protection to accumulator; achieve the purpose that increasing storage battery service life, it is simple in structure, it is of low cost; system power dissipation is low; accuracy of detection is high, fast response time, stability and good reliability; it is easy to control, it is with good expansibility.
Description
Technical field
The utility model is related to technical field of photovoltaic power generation, more particularly to a kind of photovoltaic charged control system.
Background technology
As the energy increasingly in short supply and environmental protection pressure constantly increases, photovoltaic power generation technology is resourceful with its, clean environment firendly,
It the advantages that small by territory restriction, is increasingly valued by people.According to the investigation and analysis to existing photovoltaic generating system, energy storage
The service life of accumulator be cause the system failure and failure an important factor for one of.Traditional independent photovoltaic generating system is general
It is charged to accumulator using single charge controller control solar panel, this method disclosure satisfy that low capacity stores substantially
The requirement of battery, but not competent large-capacity battery or accumulator group.It is needed when the accumulator or battery charging of large capacity
The charging current wanted is larger, and charge controller puts into/cut out charging frequently in charging process, larger to accumulator impact, is easy
Damage accumulator.Currently, large-capacity battery and accumulator group are just gradually widely used, and therefore, it is necessary to more efficient, reliable
Charge control scheme.
Utility model content
(1) the technical issues of solving
To solve the above-mentioned problems, the utility model provides a kind of photovoltaic charged control system, by judging accumulator
Charged state, take corresponding charging modes, to adapt to the accumulator of different capabilities, reach increasing storage battery service life
Purpose.
(2) technical solution
A kind of photovoltaic charged control system, including control unit, charhing unit, sampling unit, key-press input unit, display
Unit, storage unit and RS485 communication units；
The charhing unit input terminal connects photovoltaic cell, and output end is connected with accumulator, and the photovoltaic cell passes through institute
Charhing unit is stated to charge to the accumulator；The charhing unit includes field-effect tube, the first and second triodes, first
~third diode and the first~the 7th resistance, wherein the field-effect tube selects P-channel power switch tube IRF4905, it is described
First and second diodes are Schottky diode；
The sampling unit acquires the charging terminal voltage of the accumulator, and output analog signal is sent into described control unit
A/D mouthfuls；The sampling unit include current sensor, first~third operational amplifier, the 4th~the 7th diode, the 8th~
23rd resistance, the first and second capacitances, wherein the current sensor selects Hall current sensor CHB_50A, it is described
It is Schottky diode that first~third operational amplifier, which selects four-operational amplifier LM324, the 4th and the 7th diode,；
Described control unit handles the acquisition signal of the sampling unit, and output pwm signal controls the charging
The duty cycle of switching of the field-effect tube of unit, to adjust charging current of the photovoltaic cell to the accumulator；Institute
The output for stating control unit is separately connected the display unit, the storage unit and the RS485 communication units；
The key-press input unit is for start and stop charging process, setting and modification charge control parameter and determines upload number
Include keyboard scan chip, keyboard matrix, quartz crystal oscillator, the capacitance of third~the 5th and the 20th according to, the key-press input unit
Four~the 30th resistance, wherein it is four rows, three row, 12 key key that the keyboard scan chip, which selects ZLG7289, the keyboard matrix,
Disk；
The charging process parameter of accumulator described in the display unit real-time display；
The storage unit preserves the charging process parameter of the accumulator, and the storage unit includes
The resistance of eeprom memory, the 31st and the 32nd, wherein the eeprom memory selects 24C02；
The charging process parameter of the accumulator is uploaded to by described control unit by the RS485 communication units
Host computer, the RS485 communication units include RS485 drivers, the 6th capacitance and the 33rd~the 38th resistance, wherein
The RS485 drivers select MAX485.
Further, described control unit selects microcontroller MSP430F148.
Further, the display unit selects LCD12864 Liquid Crystal Modules.
Preferably, further including indicator unit, the indicator unit selects bi-colour LED, indicates filling for accumulator
Electricity condition.
(3) advantageous effect
The utility model provides a kind of photovoltaic charged control system and passes through in conjunction with sensor and single-chip microcomputer control technology
The charged state for judging accumulator takes corresponding charging modes, can be steady to accumulator to adapt to the accumulator of different capabilities
Determine, reliably charge, enhance the protection to accumulator, achievees the purpose that increasing storage battery service life, structure letter
Single, of low cost, system power dissipation is low, and accuracy of detection is high, fast response time, and stability and good reliability are easy to control, have good
Good scalability.
Description of the drawings
Fig. 1 is a kind of functional block diagram of photovoltaic charged control system involved by the utility model.
Fig. 2 is a kind of charhing unit circuit diagram of photovoltaic charged control system involved by the utility model.
Fig. 3 is a kind of sampling unit circuit diagram of photovoltaic charged control system involved by the utility model.
Fig. 4 is a kind of key-press input unit circuit diagram of photovoltaic charged control system involved by the utility model.
Fig. 5 is a kind of storage unit circuit schematic diagram of photovoltaic charged control system involved by the utility model.
Fig. 6 is a kind of RS485 communication unit circuit diagrams of photovoltaic charged control system involved by the utility model.
Specific implementation mode
The embodiment involved by the utility model is described in further details below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of photovoltaic charged control system, including control unit, charhing unit, sampling unit, button are defeated
Enter unit, display unit, storage unit and RS485 communication units.
Charhing unit input terminal connects photovoltaic cell, and output end is connected with accumulator, and photovoltaic cell passes through charhing unit pair
Accumulator charges.As shown in Fig. 2, charhing unit includes field-effect tube Q1, triode Q2 and Q3, diode D1~D3 and electricity
R1~R7 is hindered, it is Schottky diode that wherein field-effect tube Q1, which selects P-channel power switch tube IRF4905, diode D1 and D2,.
IRF4905 has small conducting resistance, and RON=20m Ω, maximum on state current ID=74A, switching speed is fast, has and opens well
Close performance.As the gate source voltage ＜ -8.0V of IRF4905, this pipe has good switch performance as switching tube.And due to
IRF4905 is P-channel, it is easy to reference voltage be selected on a point, the reliability of larger raising system is capable of.Diode D2
Effect be anti-reverse charging, that is, when accumulator E2 voltages are higher than photovoltaic cell E1 voltages, diode D2 cut-off, it is therefore prevented that store
Battery E2 is to photovoltaic cell E1 reverse charges.Diode D3 prevents accumulator E2 positive-negative polarity reversal connections, i.e., when accumulator E2 reversal connections,
Diode D3 forward conductions, electric current is very big, and fusible link can be blown, and circuit disconnects, to protect accumulator E2 and control unit
Point, improve the reliability of system.When control unit provides the control signal of charging, triode Q3 conductings, due to triode Q3
Work in emitter-base bandgap grading output state, transmitting extremely high level, triode Q2 conductings, due to the pressure stabilization function of diode D1 so that
The gate source voltage clamper of IRF4905 is connected in -10V, IRF4905, and photovoltaic cell E1 charges to accumulator E2.Conversely, triode
Q2 and Q3 are turned off, and IRF4905 is disconnected, and photovoltaic cell E1 cannot charge to accumulator E2.
Sampling unit acquires the charging terminal voltage of accumulator, and output analog signal is sent into the A/D mouths of control unit.Such as Fig. 3
Shown, sampling unit includes current sensor U1, operational amplifier U2A~U2C, diode D4~D7, resistance R8~R23, electricity
Hold C1 and C2, wherein current sensor U1 selects Hall current sensor CHB_50A, operational amplifier U2A~U2C to select four fortune
Amplifier LM324 is calculated, diode D4 and D7 are Schottky diode.The operation principle of Hall current sensor CHB_50A is suddenly
That magnetic compensation, rated current 50A, turn ratio 1：1000, operating voltage 5V.The photovoltaic cell of current sensor U1 acquisitions
Operating current signal first pass around a power resistor R17 and be converted to corresponding voltage signal, then through resistance R19 and capacitance C1
Through LM324 ratio enlargements after being added with a DC voltage Setting signal DCin after the RC filtering of composition, with the given letter of DC voltage
The purpose of number DCin superposition is that the current signal of input is made to change between 0~5V after direct current biasing, meets control unit
Requirement of the A/D mouths to input signal, RC filtering and ratio enlargement are to reduce interference.
Control unit handles the acquisition signal of sampling unit, when accumulator charging terminal voltage is less than default charging quickly
When pressure, control unit output pwm signal adjusts IRF4905 duty ratios and is at nearly singular integral conducting state, and charhing unit is defeated
Go out high current and quick charge is carried out to accumulator；When accumulator charging terminal voltage is close to default equalizing voltage, control unit is defeated
Go out pwm signal and adjust IRF4905 duty ratios to be at Discontinuous Conduction state, charhing unit export constant-voltage power supply to accumulator into
Row equalizaing charge；When accumulator charging terminal voltage is close to default float charge voltage, control unit output pwm signal is adjusted
IRF4905 duty ratios are at the state almost turned off, and charhing unit exports trickle current and carries out floating charge to accumulator, to
Adjust charging current of the photovoltaic cell to accumulator.The output of control unit is separately connected display unit, storage unit and RS485
Communication unit.Control unit selects microcontroller MSP430F148, operating voltage 5V, is the list of a band 10 A/D conversions
Piece movement piece has superpower jamproof characteristic, and has ultralow power consumption, and electric current is only 4~7mA when normal work, empty
Idle electric current ＜ 1mA.Its work period is only a clock cycle, can substantially reduce the frequency of the external crystal-controlled oscillation used,
To reduce electromagnetic interference.MSP430F148 has the characteristics that pin is few, small, price is low, easy to use, can reduce exploitation
Cost shortens the development cycle.
Key-press input unit is used for start and stop charging process, setting and modification charge control parameter such as fast charge voltage, balanced electricity
The charging processes such as pressure, float charge voltage parameter and determining upload data.As shown in figure 4, key-press input unit includes keyboard scan
Chip U3, keyboard matrix, quartz crystal oscillator X1, capacitance C3~C5 and resistance R24~R30, wherein keyboard scan chip U3 are selected
ZLG7289, keyboard matrix are four rows, three row, 12 key board.Contain decoder inside ZLG7289, with serial line interface, monolithic is
The repertoire of keyboard interface can be completed, external four rows, three row, 12 key board, KEY feet can become low electricity when having by key pressing
It is flat, it can read institute's key value using instruction.
Display unit selects LCD12864 Liquid Crystal Modules, the charging process parameter of real-time display accumulator to facilitate timely
Solve the power generation situation of photovoltaic system.
Storage unit preserves the charging process parameter of accumulator, is deposited as shown in figure 5, storage unit includes EEPROM
Reservoir U4, resistance R31 and R32, wherein eeprom memory U4 select 24C02.
The charging process parameter of accumulator is uploaded to host computer by control unit by RS485 communication units, with into traveling
The processing of one step is analyzed.As shown in fig. 6, RS485 communication units include RS485 drivers U5, capacitance C6 and resistance R33~R39,
Wherein RS485 drivers U5 selects MAX485.The maximum communication distances of RS485 are about 1219m, and peak transfer rate is
Line between 10Mbps, with host computer only need simply to be held " A ", " B " with a pair of of twisted-pair feeder connect can be realized it is logical
Letter, it is very convenient, fully meet the requirement that off-line measurement system is transmitted at a distance.
Further include indicator unit in order to which more intuitively whether display accumulator is full of, indicator unit is red green double
Color indicator light, red indicate that accumulator is in charging process, and green indicates that accumulator fills with.
The utility model provides a kind of photovoltaic charged control system and passes through in conjunction with sensor and single-chip microcomputer control technology
The charged state for judging accumulator takes corresponding charging modes, can be steady to accumulator to adapt to the accumulator of different capabilities
Determine, reliably charge, enhance the protection to accumulator, achievees the purpose that increasing storage battery service life, structure letter
Single, of low cost, system power dissipation is low, and accuracy of detection is high, fast response time, and stability and good reliability are easy to control, have good
Good scalability.
Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality
Novel conception and scope is defined.Without departing from the design concept of the present utility model, ordinary people in the field couple
The all variations and modifications that the technical solution of the utility model is made, should fall within the protection scope of the present utility model, this reality
With novel claimed technology contents, all record in detail in the claims.
Claims (4)
1. a kind of photovoltaic charged control system, it is characterised in that：Including control unit, charhing unit, sampling unit, key-press input
Unit, display unit, storage unit and RS485 communication units；
The charhing unit input terminal connects photovoltaic cell, and output end is connected with accumulator, and the photovoltaic cell is filled by described
Electric unit charges to the accumulator；The charhing unit includes field-effect tube, the first and second triodes, the first~the
Three diodes and the first~the 7th resistance, wherein the field-effect tube selects P-channel power switch tube IRF4905, described first
It is Schottky diode with the second diode；
The sampling unit acquires the charging terminal voltage of the accumulator, and output analog signal is sent into the A/D of described control unit
Mouthful；The sampling unit includes current sensor, first~third operational amplifier, the 4th~the 7th diode, the eight~the
23 resistance, the first and second capacitances, wherein the current sensor selects Hall current sensor CHB_50A, described the
It is Schottky diode that one~third operational amplifier, which selects four-operational amplifier LM324, the 4th and the 7th diode,；
Described control unit handles the acquisition signal of the sampling unit, and output pwm signal controls the charhing unit
The field-effect tube duty cycle of switching, to adjust charging current of the photovoltaic cell to the accumulator；The control
The output of unit processed is separately connected the display unit, the storage unit and the RS485 communication units；
The key-press input unit is for start and stop charging process, setting and modification charge control parameter and determines upload data,
The key-press input unit include keyboard scan chip, keyboard matrix, quartz crystal oscillator, the capacitance of third~the 5th and the 24th~
30th resistance, wherein it is four rows, three row, 12 key board that the keyboard scan chip, which selects ZLG7289, the keyboard matrix,；
The charging process parameter of accumulator described in the display unit real-time display；
The storage unit preserves the charging process parameter of the accumulator, and the storage unit includes EEPROM
The resistance of memory, the 31st and the 32nd, wherein the eeprom memory selects 24C02；
The charging process parameter of the accumulator is uploaded to upper by described control unit by the RS485 communication units
Machine, the RS485 communication units include RS485 drivers, the 6th capacitance and the 33rd~the 38th resistance, wherein described
RS485 drivers select MAX485.
2. a kind of photovoltaic charged control system according to claim 1, it is characterised in that：Described control unit selects monolithic
Machine MSP430F148.
3. a kind of photovoltaic charged control system according to claim 1, it is characterised in that：The display unit is selected
LCD12864 Liquid Crystal Modules.
4. a kind of photovoltaic charged control system according to claim 1, it is characterised in that：Further include indicator unit, institute
It states indicator unit and selects bi-colour LED, indicate the charged state of accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721878516.1U CN207801554U (en) | 2017-12-28 | 2017-12-28 | A kind of photovoltaic charged control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721878516.1U CN207801554U (en) | 2017-12-28 | 2017-12-28 | A kind of photovoltaic charged control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207801554U true CN207801554U (en) | 2018-08-31 |
Family
ID=63280355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721878516.1U Active CN207801554U (en) | 2017-12-28 | 2017-12-28 | A kind of photovoltaic charged control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207801554U (en) |
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2017
- 2017-12-28 CN CN201721878516.1U patent/CN207801554U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190520 Address after: 310020 30 buildings in Beijingxi Garden, Nanxiaobu, Hangzhou, Zhejiang Province Patentee after: Zhejiang Jiangneng Construction Co., Ltd. Address before: 313000 208, room 2, 212 Hongqi Road, Wuxing District, Huzhou, Zhejiang. Patentee before: Huzhou inspiration Electronic Technology Co., Ltd. |
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| TR01 | Transfer of patent right |