CN105871045A - Charging circuit for solar control system - Google Patents
Charging circuit for solar control system Download PDFInfo
- Publication number
- CN105871045A CN105871045A CN201610405158.6A CN201610405158A CN105871045A CN 105871045 A CN105871045 A CN 105871045A CN 201610405158 A CN201610405158 A CN 201610405158A CN 105871045 A CN105871045 A CN 105871045A
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- resistance
- solar panels
- switch
- type triode
- ground end
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Classifications
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- 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
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- 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
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging circuit for a solar control system. The charging circuit comprises a first switch, a second switch, a first switch driving unit, a second switch driving unit, a step-down unit, a solar panel short circuit detection unit and a current direction control unit, wherein a common junction between a solar panel and the positive electrode end of a storage battery is connected with the first switch through the step-down unit; the step-down unit is connected with the ground end of the solar panel through the first switch driving unit; the current direction control unit, the second switch driving unit and the second switch are connected in sequence; a common junction between the current direction control unit and the second switch driving unit is connected with the ground end of the solar panel through the solar panel short circuit detection unit. The charging circuit has the advantages that (1) the step-down unit is adopted, so that the solar panel and the storage battery form a conducting loop, and the storage battery is activated automatically; (2) when the solar panel is short-circuited, the solar panel short circuit detection unit is adopted in order that the second switch driving unit controls the second switch to be disconnected, and the storage battery cannot discharge.
Description
Technical field
The present invention relates to technical field of solar, particularly relate to that there is battery activation and the solar charging circuit of anti-solar panels short-circuit function.
Background technology
Solar energy as a kind of novel energy, because of advantages such as resource are the most exhausted, pollution-free, is developed the most rapidly；Solar control system is that accumulator is charged by charging circuit.But, in solar control system, there is following defect in existing charging circuit:
(1) being load supplying when accumulator night, when there is Cross prevention or the unbalanced protection of voltage, accumulator will quit work, and cause second day daytime because accumulator cannot automatically form charge activation loop and cannot be recharged by solar panels.(2) when charging circuit is accumulator charging, if solar panels are short-circuited because of fault, solar control system can be caused to be damaged.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of charging circuit in solar control system, (1) this circuit has accumulator and automatically activates function, can solve accumulator because cross put power-off and cause cannot the problem of activating charge automatically again；(2) this circuit has anti-solar panels short-circuit function, when accumulator can be prevented to charge, causes the problem that solar control system is damaged because solar panels are short-circuited.
To achieve these goals, technical solution of the present invention is as follows:
A kind of charging circuit in solar control system, including the first switch, second switch, the first switch drive unit, second switch driver element, pressure unit, solar panels short detection unit, sense of current control unit.
The ground end of accumulator sequentially passes through described second switch, the first switch is connected with the ground end of solar panels.The positive terminal of solar panels is connected through pressure unit and the first switch with the common node of the positive terminal of accumulator；And pressure unit is connected with the ground end of solar panels through the first switch drive unit；Described first switch drive unit receives the first control signal of the control unit of controller for solar.Described sense of current control unit receives the second control signal of the control unit of controller for solar；Described sense of current control unit, second switch driver element, second switch are sequentially connected with.Described sense of current control unit, the common node of second switch driver element are connected with the ground end of solar panels through described solar panels short detection unit.
A kind of charging circuit in solar control system, including PNP type triode Q1, NPN type triode Q2, diode D1, D2, Zener diode D4, N-type field effect transistor Q4, resistance R1, R2, R3, R4, R5, R6, R7, R8, NPN type triode Q3, N-type field effect transistor Q5, diode D3, resistance R10, R11, R12.
The base stage of PNP type triode Q1 the first driving signal by resistance R2 reception control unit, and the base stage of PNP type triode Q1 sequentially passes through resistance R1, diode D1 is connected with the positive terminal of solar panels；The emitter stage of PNP type triode Q1 connects the first power supply；The colelctor electrode of PNP type triode Q1 sequentially passes through resistance R4, R5 and connects the ground end of solar panels；The positive terminal of solar panels sequentially passes through resistance R3, Zener diode D4 and is connected with the ground end of solar panels；The base stage of NPN type triode Q2 connects the common node of resistance R4 and resistance R5；The colelctor electrode of NPN type triode Q2 connects the common node of resistance R3 and Zener diode D4；The emitter stage of NPN type triode Q2 connects the ground end of solar panels；The colelctor electrode of NPN type triode Q2 and sequentially pass through resistance R6, R7 and connect the ground end of solar panels；The common node of resistance R6 and resistance R7 is connected the grid of N-type field effect transistor Q4 through resistance R8.
The base stage of NPN type triode Q3 sequentially passes through resistance R13, the two driving signal of diode D3 reception control unit；The colelctor electrode of NPN type triode Q3 connects second source through resistance R10；The emitter stage of NPN type triode Q3 is connected with the ground end of accumulator；The base stage of NPN type triode Q3 and sequentially pass through resistance R12, R11 and connect the positive terminal of solar panels；The common node of resistance R12 and resistance R11 is connected the ground end of solar panels.
The source electrode of N-type field effect transistor Q4 is connected with the positive terminal of solar panels；The drain electrode of N-type field effect transistor Q4 is connected with the drain electrode of N-type field effect transistor Q5；The source electrode of N-type field effect transistor Q5 is connected with the ground end of accumulator.
Beneficial effects of the present invention:
(1) voltage of solar panels controls the first switch conduction by pressure unit so that solar panels and accumulator form conducting loop, and accumulator activates automatically, solve accumulator because of cross put power-off and cause cannot the problem of activating charge automatically again.(2) solar panels short detection unit detects when solar panels are short-circuited, the positive electrical stream of accumulator is delivered to second switch driver element by solar panels short detection unit, second switch driver element controls second switch and disconnects, accumulator cannot be discharged, when solving accumulator charging, cause the problem that solar control system is damaged because solar panels are short-circuited.
Accompanying drawing explanation
Fig. 1 is the functional-block diagram of the present invention.
Fig. 2 is the circuit theory diagrams of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the present invention is expanded on further.
As it is shown in figure 1, be the functional-block diagram of charging circuit of the present invention.This charging circuit includes the first switch, second switch, the first switch drive unit, second switch driver element, pressure unit, solar panels short detection unit, sense of current control unit.
The ground end (BatGND) of accumulator sequentially passes through described second switch, the first switch is connected with the ground end (PVGND) of solar panels.The positive terminal (PV+) of solar panels is connected through pressure unit and the first switch with the common node of the positive terminal (BAT+) of accumulator.Pressure unit is connected with the ground end (PVGND) of solar panels through the first switch drive unit.First switch drive unit receives first control signal (PWM_PV) of the control unit of controller for solar.Sense of current control unit receives second control signal (PWM_BAT) of the control unit of controller for solar；Sense of current control unit, second switch driver element, second switch are sequentially connected with.Sense of current control unit, the common node of second switch driver element are connected with the ground end (PVGND) of solar panels through solar panels short detection unit.
First switch drive unit receives first control signal (PWM_PV) of the control unit of controller for solar so that pressure unit is turned on or off with the ground end (PVGND) of solar panels, thus controls being opened or closed of the first switch.Solar panels are to put or time accumulator that is unbalanced and that be under protected state of discharging is charged because crossing; its control unit is not started working; pressure unit disconnects with the ground end (PVGND) of solar panels, and the voltage that the positive pole (PV+) of solar panels exports acts on the control end of the first switch after pressure unit blood pressure lowering.First switch conduction, solar panels, accumulator, second switch, the first switch composition power circuit, accumulator is activated.Then, the first switch drive unit, second switch driver element control the conducting of the first switch, second switch respectively, and solar panels charge a battery.
When daytime, solar panels charged the battery; if cell panel suddenly because of fault be short-circuited time; the voltage instantaneous of solar panels ground end (PVGND) is equal to the voltage of solar panels positive terminal (PV+); now; the positive electrical stream of accumulator is delivered to second switch driver element by solar panels short detection unit; second switch driver element controls second switch and disconnects so that accumulator cannot be discharged, thus protects controller for solar to be not damaged by.The electric current that sense of current control unit prevents solar panels short detection unit from flowing through is input to control unit so that control unit is damaged.
As in figure 2 it is shown, be the physical circuit schematic diagram of charging circuit of the present invention.First switch comprises N-type field effect transistor Q4, resistance R6, R7, R8.Second switch comprises N-type field effect transistor Q5, resistance R9.Pressure unit comprises Zener diode D4, resistance R3.First switch drive unit comprises PNP type triode Q1, NPN type triode Q2, diode D1, D2, resistance R1, R2, R4, R5, the first power supply (VCC_5V).Solar panels short detection unit comprises resistance R11, resistance R12.Sense of current control unit comprises diode D3, resistance R13.Second switch driver element comprises NPN type triode Q3, resistance R10, second source (VCC_12V).
The base stage of PNP type triode Q1 drives signal (PWM_PV) by the first of resistance R2 reception control unit, and the base stage of PNP type triode Q1 sequentially passes through resistance R1, diode D1 and is connected with the positive terminal (PV+) of solar panels；The emitter stage of PNP type triode Q1 connects the first power supply (VCC_5V)；The colelctor electrode of PNP type triode Q1 sequentially passes through resistance R4, R5 and connects the ground end (PVGND) of solar panels.The positive terminal (PV+) of solar panels sequentially passes through resistance R3, Zener diode D4 and is connected with the ground end (PVGND) of solar panels.The base stage of NPN type triode Q2 connects the common node of resistance R4 and resistance R5；The colelctor electrode of NPN type triode Q2 connects the common node of resistance R3 and Zener diode D4；The emitter stage of NPN type triode Q2 connects the ground end (PVGND) of solar panels.The colelctor electrode of NPN type triode Q2 and sequentially pass through resistance R6, R7 and connect the ground end (PVGND) of solar panels.The common node of resistance R6 and resistance R7 is connected the grid of N-type field effect transistor Q4 through resistance R8.
The base stage of NPN type triode Q3 sequentially passes through resistance R13, the two driving signal (PWM_BAT) of diode D3 reception control unit；The colelctor electrode of NPN type triode Q3 connects second source (VCC_12V) through resistance R10；The emitter stage of NPN type triode Q3 is connected with the ground end (BatGND) of accumulator.The base stage of NPN type triode Q3 and sequentially pass through resistance R12, R11 and connect the positive terminal (PV+) of solar panels；The common node of resistance R12 and resistance R11 is connected the ground end (PVGND) of solar panels.
The source electrode of N-type field effect transistor Q4 is connected with the positive terminal (PV+) of solar panels；The drain electrode of N-type field effect transistor Q4 is connected with the drain electrode of N-type field effect transistor Q5；The source electrode of N-type field effect transistor Q5 is connected with the ground end (BatGND) of accumulator.
Analyze the operation principle of circuit in detail below:
Accumulator is at powering load at night, and when there is Cross prevention or the unbalanced protection of voltage, controller battery-end BAT+ and BATGND end do not have voltage, and accumulator will quit work, and need charge circuit to activate before accumulator is recharged.
Second day daytime; shine upon solar panels and produce voltage; resistance R3 and diode D4 forms linear voltage dropping circuit; now the control unit of controller for solar does not the most work; NPN type triode Q2 is in cut-off state; the voltage of voltage regulation of diode D4 drives N-type field effect transistor Q4 to turn on by resistance R6 and resistance R7 dividing potential drop; the voltage of solar panel forms loop by the body diode → N-type field effect transistor Q4 → PVGND of PV+ → BAT+ → BATGND → N-type field effect transistor Q4, activates protected accumulator.When controller for solar detects and can charge normal, the control unit of controller for solar produces control signal PWM_PV and PWM_BAT controls solar panels and charges a battery.PWM_PV be high level or pwm signal, PWM_BAT be low level or pwm signal, control N-type field effect transistor Q4, Q5 respectively, it is achieved solar panels carry out constant-voltage charge to accumulator.Further, controller for solar can regularly make PWM_BAT be high level, turns off N-type field effect transistor Q5, the voltage of solar panels of sampling during this period, is charged judging.
When daytime, solar panels charged the battery; if cell panel suddenly because of fault be short-circuited time; the voltage instantaneous of solar panels ground end (PVGND) is equal to the voltage of solar panels positive terminal (PV+); now; the positive electrical stream of accumulator makes NPN type triode Q3 turn on by resistance R12; N-type field effect transistor Q5 moment turns off, and charge circuit turns off, thus protects controller for solar to be not damaged by.Further, N-type field effect transistor Q5 also prevents accumulator at night from discharging solar panels, when controller for solar detects that solar panels are discharged by accumulator, can disconnect N-type field effect transistor Q5 by automatic instantaneous.Diode D3 prevents the big circuit damage control unit produced during solar panels short circuit.
Diode D1, resistance R1 place circuit are used for preventing reverse connection of accumulator from causing metal-oxide-semiconductor to damage.When solar panels just connect, diode D1 and resistance R1 can ensure that, under reverse connection of accumulator state, audion Q1 is in the conduction state, so that N-type field effect transistor Q4 is off state.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above example.Other being appreciated that those skilled in the art the most directly derive or associate improves and within change is all considered as being included in protection scope of the present invention.
Claims (2)
1. the charging circuit in solar control system, it is characterised in that:
Including the first switch, second switch, the first switch drive unit, second switch driver element, pressure unit, solar panels short detection unit, sense of current control unit；
The ground end (BatGND) of accumulator sequentially passes through described second switch, the first switch is connected with the ground end (PVGND) of solar panels；
The positive terminal (PV+) of solar panels is connected through pressure unit and the first switch with the common node of the positive terminal (BAT+) of accumulator；And pressure unit is connected with the ground end (PVGND) of solar panels through the first switch drive unit；Described first switch drive unit receives first control signal (PWM_PV) of the control unit of controller for solar；
Described sense of current control unit receives second control signal (PWM_BAT) of the control unit of controller for solar；Described sense of current control unit, second switch driver element, second switch are sequentially connected with；
Described sense of current control unit, the common node of second switch driver element are connected with the ground end (PVGND) of solar panels through described solar panels short detection unit.
2. the charging circuit in solar control system, it is characterised in that:
Including PNP type triode Q1, NPN type triode Q2, diode D1, D2, Zener diode D4, N-type field effect transistor Q4, resistance R1, R2, R3, R4, R5, R6, R7, R8, NPN type triode Q3, N-type field effect transistor Q5, diode D3, resistance R10, R11, R12；
The base stage of PNP type triode Q1 drives signal (PWM_PV) by the first of resistance R2 reception control unit, and the base stage of PNP type triode Q1 sequentially passes through resistance R1, diode D1 and is connected with the positive terminal (PV+) of solar panels；The emitter stage of PNP type triode Q1 connects the first power supply (VCC_5V)；The colelctor electrode of PNP type triode Q1 sequentially passes through resistance R4, R5 and connects the ground end (PVGND) of solar panels；The positive terminal (PV+) of solar panels sequentially passes through resistance R3, Zener diode D4 and is connected with the ground end (PVGND) of solar panels；The base stage of NPN type triode Q2 connects the common node of resistance R4 and resistance R5；The colelctor electrode of NPN type triode Q2 connects the common node of resistance R3 and Zener diode D4；The emitter stage of NPN type triode Q2 connects the ground end (PVGND) of solar panels；The colelctor electrode of NPN type triode Q2 and sequentially pass through resistance R6, R7 and connect the ground end (PVGND) of solar panels；The common node of resistance R6 and resistance R7 is connected the grid of N-type field effect transistor Q4 through resistance R8；
The base stage of NPN type triode Q3 sequentially passes through resistance R13, the two driving signal (PWM_BAT) of diode D3 reception control unit；The colelctor electrode of NPN type triode Q3 connects second source (VCC_12V) through resistance R10；The emitter stage of NPN type triode Q3 is connected with the ground end (BatGND) of accumulator；The base stage of NPN type triode Q3 and sequentially pass through resistance R12, R11 and connect the positive terminal (PV+) of solar panels；The common node of resistance R12 and resistance R11 is connected the ground end (PVGND) of solar panels；
The source electrode of N-type field effect transistor Q4 is connected with the positive terminal (PV+) of solar panels；The drain electrode of N-type field effect transistor Q4 is connected with the drain electrode of N-type field effect transistor Q5；The source electrode of N-type field effect transistor Q5 is connected with the ground end (BatGND) of accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405158.6A CN105871045B (en) | 2016-06-12 | 2016-06-12 | A kind of charging circuit being used in solar control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405158.6A CN105871045B (en) | 2016-06-12 | 2016-06-12 | A kind of charging circuit being used in solar control system |
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| Publication Number | Publication Date |
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| CN105871045A true CN105871045A (en) | 2016-08-17 |
| CN105871045B CN105871045B (en) | 2018-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610405158.6A Active CN105871045B (en) | 2016-06-12 | 2016-06-12 | A kind of charging circuit being used in solar control system |
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| CN (1) | CN105871045B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107453702A (en) * | 2017-08-22 | 2017-12-08 | 深圳硕日新能源科技有限公司 | A kind of controller for solar of intelligent radio |
| CN112510290A (en) * | 2020-11-05 | 2021-03-16 | 深圳硕日新能源科技有限公司 | Heating control device and solar control system of lithium battery |
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| CN112510290A (en) * | 2020-11-05 | 2021-03-16 | 深圳硕日新能源科技有限公司 | Heating control device and solar control system of lithium battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105871045B (en) | 2018-04-24 |
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