CN202906499U - Photovoltaic charging controller used in GPRS remote measuring system - Google Patents
Photovoltaic charging controller used in GPRS remote measuring system Download PDFInfo
- Publication number
- CN202906499U CN202906499U CN2012203990353U CN201220399035U CN202906499U CN 202906499 U CN202906499 U CN 202906499U CN 2012203990353 U CN2012203990353 U CN 2012203990353U CN 201220399035 U CN201220399035 U CN 201220399035U CN 202906499 U CN202906499 U CN 202906499U
- Authority
- CN
- China
- Prior art keywords
- chip microcomputer
- circuit
- storage battery
- links
- gprs
- 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.)
- Expired - Lifetime
Links
- 238000004891 communication Methods 0.000 claims abstract description 6
- 230000005669 field effect Effects 0.000 claims description 38
- 238000007599 discharging Methods 0.000 abstract description 18
- 238000011217 control strategy Methods 0.000 abstract description 8
- 230000004224 protection Effects 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000009529 body temperature measurement Methods 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 8
- 230000002265 prevention Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
Images
Classifications
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a photovoltaic charging controller used in a GPRS remote measuring system. The controller comprises a single chip microcomputer, a charging control circuit, a discharging control circuit and a 485 interface circuit, wherein the charging control circuit, the discharging control circuit and the 485 interface circuit are connected with the single chip microcomputer. The charging control circuit is connected between a solar cell and a storage battery. The discharging control circuit is connected between the storage battery and a load. The 485 interface circuit is connected with the GPRS remote measuring system or an upper computer through a communication cable. The solar cell is connected in parallel with a solar cell voltage measurement circuit. The storage battery is connected in parallel with a storage battery voltage measurement circuit. A temperature measurement circuit adjoins to the storage battery. Output terminals of the solar cell voltage measurement circuit, the storage battery voltage measurement circuit and the temperature measurement circuit are connected with the single chip microcomputer respectively. By using the controller of the utility model, overcharge and over-discharge protections can be performed on the storage battery; a charging and discharging control strategy is optimized and a service life of the storage battery is effectively prolonged. Charging and discharging data of the storage battery can be collected and transmitted in real time. A working state of a photovoltaic system is monitored remotely, which is convenient for timely maintenance.
Description
Technical field
The utility model relates to photovoltaic charged technical field, relates in particular to a kind of GPRS telemetry system photovoltaic charge controller.
Background technology
GPRS telemetry system application industry is a lot, such as industries such as hydrology detection, environmental protection, meteorologies application is arranged all.Because it is many in the wilderness that the GPRS telemetry system is measured the region; there is not the mains supply condition; need to adopt the photovoltaic system power supply; the photovoltaic system of present more employing " the direct floating charge of non-maintaining sealed lead acid storage battery "; directly to charge in batteries, that this mode has its solar cell is simple and reliable by the reverse protection diode, reduce the advantage such as line service amount.
But " directly floating charge " is because no storage battery overcharges, Cross prevention and can't discharge and recharge the optimization of control strategy, and be larger on life of storage battery impact.
Another distinct issues of " directly floating charge " are to carry out charging and discharging state and data acquisition and transmission, thereby can't realize the remote monitoring of photovoltaic system operating state.
Summary of the invention
The utility model solves mainly that original photovoltaic charging system no storage battery overcharges, Cross prevention and can't discharge and recharge the optimization of control strategy, on the larger technical problem of life of storage battery impact; A kind of GPRS telemetry system photovoltaic charge controller is provided, and it can overcharge storage battery, Cross prevention, optimize to discharge and recharge control strategy, thus effective increasing storage battery service life.
The utility model solves original GPRS remote measurement simultaneously can't discharge and recharge data acquisition and transmission with photovoltaic system, thereby can't realize the technical problem of photovoltaic system operating state remote monitoring; A kind of GPRS telemetry system photovoltaic charge controller is provided, it can carry out Real-time Collection and transmission to discharging and recharging data, thereby realize the remote monitoring of photovoltaic system operating state, be convenient in time safeguard and adjust, guarantee that whole photovoltaic system is in normal operating state always.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the utility model comprises single-chip microcomputer and the charging control circuit, charge/discharge control circuit and 485 interface circuits that link to each other with single-chip microcomputer, charging control circuit is connected between solar cell and the storage battery, charge/discharge control circuit is connected between storage battery and the load, and 485 interface circuits link to each other with GPRS telemetry system or host computer by communication cable.Single-chip microcomputer obtains charging current and charging voltage by the charging current in the charging control circuit and charging voltage sample circuit; obtain discharging current, discharge voltage by the discharging current in the charge/discharge control circuit and discharge voltage sample circuit; through internal processes analysis and processing; send respectively control signal to charging control circuit, charge/discharge control circuit; open or close charge and discharge, thereby realization overcharges, Cross prevention.Set by the single-chip microcomputer internal processes, also can come the duty ratio of control signal by the make-and-break time that single-chip microcomputer is regulated charging control circuit, thereby realize the PWM mode of output voltage is adjusted, optimize the control strategy that discharges and recharges.Charging and discharging currents, voltage and state that single-chip microcomputer obtains can flow to the GPRS telemetry system by 485 interface circuits, sent to the monitoring host computer of far-end by the GPRS module, perhaps pass through the direct teletransmission of 485 interface circuits to host computer, realize the remote monitoring of photovoltaic system operating state.Certainly, also can connect other communication interface on the single-chip microcomputer, the data communication of realization and GPRS telemetry system or host computer.Parameters such as " voltage are closed in charging cut-in voltage, charging " can be passed through 485 interface circuits, arranged by host computer or GPRS telemetry system, but the data power down of setting is preserved.
As preferably, described charging control circuit comprises field effect transistor Q1, resistance R 1 and flash current sense amplifier U1, the source electrode of field effect transistor Q1 links to each other with the positive pole of described solar cell, the drain electrode of field effect transistor Q1 links to each other through the positive pole of resistance R 1 and described storage battery, the input of described flash current sense amplifier U1 is connected to the two ends of resistance R 1, and the output of the grid of field effect transistor Q1, flash current sense amplifier U1 links to each other with described single-chip microcomputer respectively.Resistance R 1 is the charging current sample resistance, by flash current sense amplifier U1, charging current is converted to the measurable voltage of A/D of single-chip microcomputer, single-chip microcomputer discharges and recharges data analysis and computing to what obtain, if be in the state of overcharging, then single-chip microcomputer sends control signal to the grid of field effect transistor Q1, makes its cut-off, thereby turn-offs charging.On the other hand, single-chip microcomputer also can carry out the PWM(pulse-width modulation by field effect transistor Q1) control, realize the PWM modulation of charging voltage.Single-chip microcomputer also can connect a control line to flash current sense amplifier U1, can it be closed by Single-chip Controlling, realize that clearance-type measures, to reduce system power dissipation.
As preferably, described charge/discharge control circuit comprises field effect transistor Q2, resistance R 2 and flash current sense amplifier U2, the source electrode of field effect transistor Q2 links to each other with the positive pole of described storage battery, the drain electrode of field effect transistor Q2 links to each other with load through resistance R 2, the input of described flash current sense amplifier U2 is connected to the two ends of resistance R 2, and the output of the grid of field effect transistor Q2, flash current sense amplifier U2 links to each other with described single-chip microcomputer respectively.Resistance R 2 is the discharging current sample resistance, by flash current sense amplifier U2, discharging current is converted to the measurable voltage of A/D of single-chip microcomputer, single-chip microcomputer is analyzed and computing the discharge parameter that obtains, if be in the state of putting, then single-chip microcomputer sends control signal to the grid of field effect transistor Q2, makes its cut-off, thereby turn-offs discharge.Single-chip microcomputer also can connect a control line to flash current sense amplifier U2, can it be closed by Single-chip Controlling, realize that clearance-type measures, to reduce system power dissipation.
As preferably; described GPRS telemetry system comprises current foldback circuit with photovoltaic charge controller; the input of current foldback circuit links to each other with the output of described flash current sense amplifier U2, and the output of current foldback circuit links to each other with described single-chip microcomputer.When discharging current during greater than a set point, current foldback circuit is exported a high level to single-chip microcomputer, sends to single-chip microcomputer and interrupts application, turn-offs field effect transistor Q2 by single-chip microcomputer output control signal, realizes overload protection, effectively increasing storage battery service life.
As preferably, be parallel with the solar array voltage measuring circuit on the described solar cell, be parallel with the battery voltage measuring circuit on the described storage battery, the output of solar array voltage measuring circuit, battery voltage measuring circuit links to each other with described single-chip microcomputer respectively, solar array voltage and battery tension are converted to the measurable voltage of A/D of single-chip microcomputer, obtain the voltage status of solar cell and storage battery.
As preferably, described solar array voltage measuring circuit comprises adjustable resistance W1, and two stiff ends of adjustable resistance W1 are respectively with the positive and negative electrode of solar cell and connect, and the movable end of adjustable resistance W1 links to each other with described single-chip microcomputer; The battery voltage measuring circuit comprises adjustable resistance W2, and two stiff ends of adjustable resistance W2 are respectively with the positive and negative electrode of storage battery and connect, and the movable end of adjustable resistance W2 links to each other with described single-chip microcomputer.
As preferably, described GPRS telemetry system comprises key circuit and display circuit with photovoltaic charge controller, and key circuit links to each other with described single-chip microcomputer respectively with display circuit.Voltage status by display circuit indication solar cell and storage battery generally can adopt several light-emitting diodes to realize.Key circuit is used for the unlatching of control light-emitting diode deixis and closes, and can reduce the power consumption of system when closing, and uses more flexible and convenient.
As preferably, be provided with temperature measuring circuit near described storage battery, the output of temperature measuring circuit links to each other with described single-chip microcomputer, carries out temperature survey by Chip Microcomputer A/D conversion.Temperature measuring circuit be used for to be measured the working temperature of storage battery, and single chip computer measurement goes out after the temperature voltage, discharge cut-in voltage, discharge are closed in charging cut-in voltage, the charging of storage battery to close the parameter such as voltage and compensate, and makes control more reliable.
As preferably, be connected with DLL (dynamic link library) circuit and watchdog circuit on the described single-chip microcomputer, in case single chip microcomputer halt can be resetted to single-chip microcomputer by watchdog circuit, to improve the reliability of system works.Single-chip microcomputer is by the DLL (dynamic link library) circuit, and adjustable is downloaded Single Chip Microcomputer (SCM) program, is convenient to software modification and upgrading.
As preferably, described single-chip microcomputer is the single-chip microcomputer of built-in AD.
The beneficial effects of the utility model are: can overcharge storage battery, Cross prevention, optimize and discharge and recharge control strategy, thus effective increasing storage battery service life.Can carry out Real-time Collection and transmission to the accumulator cell charging and discharging data, thereby realize the remote monitoring of photovoltaic system operating state, be convenient in time safeguard and adjust, guarantee that whole photovoltaic system is in normal operating state always.
Description of drawings
Fig. 1 is a kind of circuit theory syndeton block diagram of the present utility model.
1. single-chip microcomputers among the figure, 2.485 interface circuits, 3. solar cell; 4. storage battery, 5. load, 6. charging control circuit; 7. charge/discharge control circuit, 8. current foldback circuit, 9. solar array voltage measuring circuit; 10. battery voltage measuring circuit; 11. key circuit, 12. display circuits, 13. temperature measuring circuits; 14. the DLL (dynamic link library) circuit, 15. watchdog circuits.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the GPRS telemetry system photovoltaic charge controller of the present embodiment; as shown in Figure 1; comprise housing and be installed on the interior control circuit of housing, control circuit comprises single-chip microcomputer 1, charging control circuit 6, charge/discharge control circuit 7, current foldback circuit 8, solar array voltage measuring circuit 9, battery voltage measuring circuit 10, key circuit 11, display circuit 12, temperature measuring circuit 13 and 485 interface circuits 2, DLL (dynamic link library) circuit 14 and watchdog circuit 15.Charging control circuit 6 comprises field effect transistor Q1, resistance R 1 and flash current sense amplifier U1, the source electrode of field effect transistor Q1 links to each other with the positive pole of solar cell 3, the drain electrode of field effect transistor Q1 links to each other through the positive pole of resistance R 1 with storage battery 4, the input of flash current sense amplifier U1 is connected to the two ends of resistance R 1, and the output of the grid of field effect transistor Q1, flash current sense amplifier U1 links to each other with single-chip microcomputer 1 respectively.Charge/discharge control circuit 7 comprises field effect transistor Q2, resistance R 2 and flash current sense amplifier U2, the source electrode of field effect transistor Q2 links to each other with the positive pole of storage battery 4, the drain electrode of field effect transistor Q2 links to each other with load 5 through resistance R 2, this load is the GPRS telemetry system, the input of flash current sense amplifier U2 is connected to the two ends of resistance R 2, and the output of the grid of field effect transistor Q2, flash current sense amplifier U2 links to each other with single-chip microcomputer 1 respectively.The output of flash current sense amplifier U2 also links to each other with the input of current foldback circuit 8; the output of current foldback circuit 8 links to each other with single-chip microcomputer 1; in the present embodiment; current foldback circuit adopts the low-power consumption amplifier; consist of voltage comparator; the in-phase input end of voltage comparator connects reference voltage, and the inverting input of voltage comparator links to each other with the output of flash current sense amplifier U2, and the output of voltage comparator connects single-chip microcomputer.Solar array voltage measuring circuit 9 comprises adjustable resistance W1, and two stiff ends of adjustable resistance W1 are respectively with the positive and negative electrode of solar cell 3 and connect, and the movable end of adjustable resistance W1 links to each other with single-chip microcomputer 1; Battery voltage measuring circuit 10 comprises adjustable resistance W2, and two stiff ends of adjustable resistance W2 are respectively with the positive and negative electrode of storage battery 4 and connect, and the movable end of adjustable resistance W2 links to each other with single-chip microcomputer 1.Key circuit 11, display circuit 12, DLL (dynamic link library) circuit 14 and watchdog circuit 15 link to each other with single-chip microcomputer 1 respectively, in the present embodiment, display circuit 12 is made of two light-emitting diodes, and the positive pole of light-emitting diode connects 3.3V voltage through resistance, and the negative pole of light-emitting diode connects single-chip microcomputer.Temperature measuring circuit is near the storage battery setting, be used for measuring the working temperature of storage battery, in the present embodiment, temperature measuring circuit is that the negative tempperature coefficient thermistor of 47 K Ω and the resistance of 57K consist of the dividing potential drop circuit by resistance under 25 ℃ of temperature, voltage after the dividing potential drop flows to single-chip microcomputer, can obtain corresponding battery-operated temperature according to the magnitude of voltage that records, close the parameter such as voltage and compensate thereby voltage, discharge cut-in voltage, discharge are closed in charging cut-in voltage, the charging of storage battery.485 interface circuits 2 link to each other with the GPRS telemetry system by communication cable.The operating voltage of whole photovoltaic charge controller is provided by power module, the positive pole of the input termination storage battery 4 of power module, and after power module is made power conversion, the output control circuit required voltage.In the present embodiment, single-chip microcomputer 1 is selected super low-power consumption MSP430 single-chip microcomputer, its built-in 10 bit A/D converters.
The course of work: solar cell is to charge in batteries, and storage battery powers to the load.Resistance R 1 is the charging current sample resistance, by flash current sense amplifier U1, charging current is converted to the measurable voltage of A/D of single-chip microcomputer.Single-chip microcomputer discharges and recharges data analysis and computing to what obtain, if the charging overcurrent, then single-chip microcomputer sends control signal to the grid of field effect transistor Q1, makes its cut-off, thereby turn-offs charging.On the other hand, single-chip microcomputer also can carry out the PWM(pulse-width modulation by field effect transistor Q1) control, realize the PWM modulation of charging voltage.Single-chip microcomputer also has a control line to link flash current sense amplifier U1, can it be closed by Single-chip Controlling, realize that clearance-type measures, to reduce system power dissipation.Resistance R 2 is the discharging current sample resistance, by flash current sense amplifier U2, discharging current is converted to the measurable voltage of A/D of single-chip microcomputer.Single-chip microcomputer is analyzed and computing the discharge data value that obtains, if be in the state of putting, then single-chip microcomputer sends control signal to the grid of field effect transistor Q2, makes its cut-off, thereby turn-offs discharge.Single-chip microcomputer also has a control line to link flash current sense amplifier U2, can it be closed by Single-chip Controlling, realize that clearance-type measures, to reduce system power dissipation.When discharging current during greater than a set point, current foldback circuit is exported a high level to single-chip microcomputer, sends to single-chip microcomputer and interrupts application, turn-offs field effect transistor Q2 by single-chip microcomputer output control signal, realizes overload protection, thus effective increasing storage battery service life.
Single-chip microcomputer obtains respectively the magnitude of voltage of solar cell, storage battery by solar array voltage measuring circuit, battery voltage measuring circuit 10, a light-emitting diode in the display circuit is used for showing the voltage status of solar cell, and another light-emitting diode is used for showing the voltage status of storage battery.Can demonstration work be set to by the single-chip microcomputer internal program:
The solar array voltage status lamp: the voltage of solar cell is more than or equal to the 12V(typical data) then bright, be lower than the 12V(typical data) then dark.
The battery tension status lamp: battery tension is greater than the 14.5V(typical data), the bright expression of lamp is full of; Battery tension is greater than the 10.5V(typical data) and less than or equal to the 14.5V(typical data) between, lamp dodges, and is expressed as charged state; Battery tension is less than or equal to the 10.5V(typical data), lamp is dark, represents to put.
Key circuit is used for controlling the unlatching of top two light-emitting diode deixises and closing.As: click button, the light-emitting diode deixis is closed, no matter solar cell, storage battery pressure condition are how, indicator light does not all work, to reduce the power consumption of system.Press one-touch, the light-emitting diode deixis is opened again, no matter solar cell, storage battery pressure condition are how, indicator light is all bright, and time-delay latter two light-emitting diode of a period of time will be indicated by actual working state.
Solar array voltage, battery tension and charging current, the discharging current that single-chip microcomputer obtains, discharge and recharge unlatching, close, the state information such as overload all flows to the GPRS telemetry system by 485 interface circuits, GPRS module by the GPRS telemetry system can send to monitoring host computer with these remote datas, realizes the remote monitoring of photovoltaic system operating state.Single-chip microcomputer is by the DLL (dynamic link library) circuit, and adjustable is downloaded Single Chip Microcomputer (SCM) program, is convenient to software modification and upgrading.In case single chip microcomputer halt can be resetted to single-chip microcomputer by watchdog circuit, to improve the reliability of system works.
The GPRS telemetry system is with the control strategy that discharges and recharges of photovoltaic charge controller:
Strategy 1: directly floating charge+super-charge super-discharge protection
Under the mode of strategy 1, field effect transistor Q1 only carries out switch control, does not carry out PWM control.
When battery tension was lower than " charging cut-in voltage ", field effect transistor Q1 conducting allowed charging, and when being higher than " voltage is closed in charging ", field effect transistor Q1 turn-offs, and does not allow charging, realized the accumulator super-charge protection.When battery tension was higher than " discharge cut-in voltage ", field effect transistor Q2 conducting allowed discharge, and when being lower than " voltage is closed in discharge ", field effect transistor Q2 turn-offs, and does not allow discharge, realizes the storage battery Cross prevention.Parameters such as wherein " charging cut-in voltage, charging are closed voltage, discharge cut-in voltage, discharged and close voltage ", according to the difference of storage battery brand and user's instructions for use and difference, can pass through 485 interface circuits, arranged by host computer or GPRS telemetry system, but the data power down of setting is preserved.
The protection of strategy 2:PWM control+super-charge super-discharge
The control of discharge of strategy 2 is with strategy 1, and its " voltage is closed in discharge cut-in voltage, discharge " also can arrange.The PWM control of strategy 2 is mainly used in charging control, and the PWM control mode refers under fixed clock frequency, by by-pass cock, comes the duty ratio of control signal such as the make-and-break time of regulating the field effect transistor Q1 in the present embodiment, thereby realizes the adjustment to output voltage.PWM modulation charging modes makes storage battery that the more sufficient reaction time be arranged, and has reduced gassing rate, has improved the charge efficiency of storage battery.
The PWM control strategy:
(1) activating charge: when storage battery was in the state of putting (voltage is lower than discharge and closes voltage), need activating charge, promote charging, keep a period of time (typical data is 10min), then drop to straight charging voltage, keep a period of time (typical data is 10min), so that the activation storage battery avoids vulcanizing crystallization.If do not occur to put, just do not need activating charge.
(2) under-voltage charging: when storage battery is in under-voltage condition (its voltage is closed voltage greater than discharge, is not more than normal working voltage), adopt straight charging voltage charging.
(3) trickle charge: when battery tension during greater than normal working voltage, being not more than charging and closing voltage, carrying out trickle charge.
(4) over-charge protective: when battery tension is closed voltage greater than charging, charge closing.
Voltage is closed in lifting charging voltage, straight charging voltage, trickle charge voltage, normal working voltage, charging all can pass through 485 interface circuit settings by host computer or GPRS telemetry system.Wherein promote the average voltage that charging voltage, straight charging voltage, trickle charge voltage are PWM output.
Claims (10)
1. GPRS telemetry system photovoltaic charge controller, it is characterized in that comprising single-chip microcomputer (1) and the charging control circuit (6), charge/discharge control circuit (7) and 485 interface circuits (2) that link to each other with single-chip microcomputer (1), charging control circuit (6) is connected between solar cell (3) and the storage battery (4), charge/discharge control circuit (7) is connected between storage battery (4) and the load (5), and 485 interface circuits (2) link to each other with GPRS telemetry system or host computer by communication cable.
2. GPRS telemetry system photovoltaic charge controller according to claim 1, it is characterized in that described charging control circuit (6) comprises field effect transistor Q1, resistance R 1 and flash current sense amplifier U1, the source electrode of field effect transistor Q1 links to each other with the positive pole of described solar cell (3), the drain electrode of field effect transistor Q1 links to each other through the positive pole of resistance R 1 with described storage battery (4), the input of described flash current sense amplifier U1 is connected to the two ends of resistance R 1, the grid of field effect transistor Q1, the output of flash current sense amplifier U1 links to each other with described single-chip microcomputer (1) respectively, and single-chip microcomputer (1) also has a control line to link flash current sense amplifier U1.
3. GPRS telemetry system photovoltaic charge controller according to claim 1, it is characterized in that described charge/discharge control circuit (7) comprises field effect transistor Q2, resistance R 2 and flash current sense amplifier U2, the source electrode of field effect transistor Q2 links to each other with the positive pole of described storage battery (4), the drain electrode of field effect transistor Q2 links to each other with load (5) through resistance R 2, the input of described flash current sense amplifier U2 is connected to the two ends of resistance R 2, the grid of field effect transistor Q2, the output of flash current sense amplifier U2 links to each other with described single-chip microcomputer (1) respectively, and single-chip microcomputer (1) also has a control line to link flash current sense amplifier U2.
4. GPRS telemetry system photovoltaic charge controller according to claim 3; it is characterized in that comprising current foldback circuit (8); the input of current foldback circuit (8) links to each other with the output of described flash current sense amplifier U2, and the output of current foldback circuit (8) links to each other with described single-chip microcomputer (1).
5. according to claim 1 and 2 or 3 or 4 described GPRS telemetry system photovoltaic charge controller, it is characterized in that being parallel with on the described solar cell (3) solar array voltage measuring circuit (9), be parallel with battery voltage measuring circuit (10) on the described storage battery (4), the output of solar array voltage measuring circuit (9), battery voltage measuring circuit (10) links to each other with described single-chip microcomputer (1) respectively.
6. GPRS telemetry system photovoltaic charge controller according to claim 5, it is characterized in that described solar array voltage measuring circuit (9) comprises adjustable resistance W1, two stiff ends of adjustable resistance W1 respectively and the positive and negative electrode of solar cell (3) and connecing, the movable end of adjustable resistance W1 links to each other with described single-chip microcomputer (1); Battery voltage measuring circuit (10) comprises adjustable resistance W2, two stiff ends of adjustable resistance W2 respectively and the positive and negative electrode of storage battery (4) and connecing, the movable end of adjustable resistance W2 links to each other with described single-chip microcomputer (1).
7. GPRS telemetry system photovoltaic charge controller according to claim 5 is characterized in that comprising key circuit (11) and display circuit (12), and key circuit (11) links to each other with described single-chip microcomputer (1) respectively with display circuit (12).
8. according to claim 1 and 2 or 3 or 4 described GPRS telemetry system photovoltaic charge controller, it is characterized in that being provided with temperature measuring circuit (13) near described storage battery (4), the output of temperature measuring circuit (13) links to each other with described single-chip microcomputer (1).
9. according to claim 1 and 2 or 3 or 4 described GPRS telemetry system photovoltaic charge controller, it is characterized in that being connected with on the described single-chip microcomputer (1) DLL (dynamic link library) circuit (14) and watchdog circuit (15).
10. according to claim 1 and 2 or 3 or 4 described GPRS telemetry system photovoltaic charge controller, it is characterized in that described single-chip microcomputer (1) is the single-chip microcomputer of built-in AD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203990353U CN202906499U (en) | 2012-08-13 | 2012-08-13 | Photovoltaic charging controller used in GPRS remote measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203990353U CN202906499U (en) | 2012-08-13 | 2012-08-13 | Photovoltaic charging controller used in GPRS remote measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202906499U true CN202906499U (en) | 2013-04-24 |
Family
ID=48127123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203990353U Expired - Lifetime CN202906499U (en) | 2012-08-13 | 2012-08-13 | Photovoltaic charging controller used in GPRS remote measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202906499U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538937A (en) * | 2014-12-03 | 2015-04-22 | 中国船舶重工集团公司第七〇五研究所 | Low-power protection apparatus of lithium ion battery |
| CN106712214A (en) * | 2017-02-27 | 2017-05-24 | 钦州市鑫勇达电子科技有限公司 | Solar charging and discharging device |
| CN108008673A (en) * | 2017-11-30 | 2018-05-08 | 深圳市水务科技发展有限公司 | A kind of wireless telemetering terminating machine based on NB-IOT |
-
2012
- 2012-08-13 CN CN2012203990353U patent/CN202906499U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538937A (en) * | 2014-12-03 | 2015-04-22 | 中国船舶重工集团公司第七〇五研究所 | Low-power protection apparatus of lithium ion battery |
| CN106712214A (en) * | 2017-02-27 | 2017-05-24 | 钦州市鑫勇达电子科技有限公司 | Solar charging and discharging device |
| CN108008673A (en) * | 2017-11-30 | 2018-05-08 | 深圳市水务科技发展有限公司 | A kind of wireless telemetering terminating machine based on NB-IOT |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102157966B (en) | Intelligent photovoltaic controller with multiple functions | |
| CN101355261A (en) | Power management system for minitype biped walking robot | |
| CN201303252Y (en) | Intelligent battery management solar charge controller | |
| CN105305514A (en) | Method and device for charging battery | |
| CN202633996U (en) | Intelligent management monitoring system of lithium battery pack | |
| CN204349496U (en) | Portable multi-voltage output mobile power supply | |
| CN202906499U (en) | Photovoltaic charging controller used in GPRS remote measuring system | |
| CN102842945A (en) | Intelligent charger for storage battery | |
| CN112637706B (en) | Small-sized low-power-consumption water level rainfall acquisition device and working method | |
| CN103645661B (en) | A kind of supply unit for instrument power managed | |
| CN205029395U (en) | Embedded intelligent charging ware | |
| CN202018730U (en) | Wireless collection node for solar energy power supply | |
| CN203722212U (en) | Storage battery protective system for small-sized wind and light complementary power generation device | |
| CN103248099B (en) | A kind of intelligent charge control circuit | |
| CN115096385A (en) | Wind-solar complementary power supply type electromagnetic water meter | |
| CN204696774U (en) | One is transferred the files charger | |
| CN202424203U (en) | Light electric car lithium battery management apparatus | |
| CN205141801U (en) | Intelligent power generation system | |
| CN209282336U (en) | A kind of portable lithium battery BMS management system | |
| CN207283222U (en) | A kind of multi-functional plumbic acid battery manager | |
| CN203180580U (en) | An intelligent lithium ion charger | |
| CN203606472U (en) | Detection device of electric locomotive storage battery residual capacity | |
| CN201312403Y (en) | Intelligent solar energy lamp controller | |
| CN201629587U (en) | Portable power supply capable of being charged through solar energy | |
| Melvix et al. | Development of intelligent battery monitoring system for solar powered lighting applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xie Shaowei Inventor after: Zheng Yi Inventor after: Shen Jiacheng Inventor before: Xie Shaowei |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XIE SHAOWEI TO: XIE SHAOWEI ZHENG YI SHEN JIACHENG |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
|
| CX01 | Expiry of patent term |