CN103647333A - Small-sized visual photovoltaic intelligent power supply device and charging method - Google Patents
Small-sized visual photovoltaic intelligent power supply device and charging method Download PDFInfo
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- CN103647333A CN103647333A CN201310742593.4A CN201310742593A CN103647333A CN 103647333 A CN103647333 A CN 103647333A CN 201310742593 A CN201310742593 A CN 201310742593A CN 103647333 A CN103647333 A CN 103647333A
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Abstract
The invention relates to a small-sized visual photovoltaic intelligent power supply device and a charging method, aiming at solving the problems of a traditional photovoltaic power supply device that the energy density is low, the device is severely influenced by the sunlight intensity, the entire utilization rate is low, and the like. The small-sized visual photovoltaic intelligent power supply device comprises a solar panel (1), wherein the solar panel is connected with an AD (analog-digital) sampling circuit (2) and a DC/DC (direct-current/direct-current) conversion circuit (3) respectively, the DC/DC conversion circuit is connected with a solar panel control switch (4), the solar panel control switch is connected with a storage battery pack, the storage battery pack is connected with the AD sampling circuit, a voltage stabilizing circuit (5) and an AC/DC selector switch (6) respectively, a controller (7) is connected with the DC/DC conversion circuit, a liquid crystal display screen (8), the AD sampling circuit, the storage battery pack and the voltage stabilizing circuit respectively, the AC/DC selector switch is connected with an inversion circuit (9) and a direct-current load (10), and the inversion circuit is connected with an alternating-current load (11). The small-sized visual photovoltaic intelligent power supply device and the charging method are used for a power supply device.
Description
technical field:
the present invention relates to a kind of visual low profile photovoltaic intelligent power supply and charging method.
background technology:
traditional photovoltaic power supply system research is found, when to charge in batteries, the charge in batteries voltage of setting is 7.2V, and experiment finds that this charging process exists some problems, when battery tension reaches 7.2V, complete charge process, but storage battery be full of that recover to connect voltage be not 7.2V, after a period of time, the terminal voltage of storage battery will reduce, storage battery will enter the charging stage, can cause like this storage battery in a day to charge repeatedly, shortens widely the useful life of storage battery.
there is following problem in traditional photovoltaic power supply device:
1, energy density is not high, and the power impact of sunlight is larger, and overall utilization rate is lower; 2, not strong to the power supply reliability of load; 3, the operational management of storage battery is unreasonable, and then causes the life-span of storage battery shorter; 4, do not needing under the condition of external power supply, rarely having photovoltaic system that Alternating Current Power Supply function is provided; 5,, owing to lacking visual device, cause user to be not easy to grasp at any time system operation information; 6, governor circuit is too complicated, is unfavorable for later maintenance.
summary of the invention:
the object of this invention is to provide a kind of visual low profile photovoltaic intelligent power supply and charging method.
above-mentioned object realizes by following technical scheme:
a kind of visual low profile photovoltaic intelligent power supply, its composition comprises: solar panel, described solar panel respectively with AD sample circuit, DC/DC change-over circuit connects, described DC/DC change-over circuit is connected with solar panel control switch, described solar panel control switch is connected with batteries, described batteries respectively with described AD sample circuit, voltage stabilizing circuit, the diverter switch of AC/DC connects, controller respectively with described DC/DC change-over circuit, LCDs, described AD sample circuit, described batteries, described voltage stabilizing circuit connects, the diverter switch of described AC/DC and inverter circuit, DC load, described inverter circuit and AC load.
described visual low profile photovoltaic intelligent power supply, described batteries comprises main storage battery, standby storage battery, described main storage battery is connected with the diverter switch of described AD sample circuit, described AC/DC respectively, described standby storage battery is connected with the diverter switch of described voltage stabilizing circuit, described AD sample circuit, described AC/DC respectively, and described solar panel control switch is connected with described main storage battery, described standby storage battery respectively.
described visual low profile photovoltaic intelligent power supply, it is kernel control chip that described inverter circuit be take the EG8010 of output SPWM signal, described inverter circuit is usingd IR2110 as driving chip, described controller circuitry comprises that STC89C52 single-chip microcomputer, A/D converter chip PCF8591, relay drive chip ULN2003A, and described LCDs adopts LCD1602.
a kind of charging method of visual low profile photovoltaic intelligent power supply, the charging voltage that this device is set storage battery is 6.6V, according to Intensity of the sunlight automatic switch-over circuit, charge a battery, constantly by A/D, gather the voltage of storage battery, according to the variation of voltage, select different charging modes, and then realize the reasonable control to storage battery: first judge the voltage of standby battery, to ensure that standby battery has sufficient electric weight, once standby battery is without electricity, system will be ineffective; Next judges the voltage of main storage battery, selects the supply power mode of load according to the voltage of main storage battery, and above process adopts endless form to run without interruption; Control main program and mainly complete the initialization to I/O, timer, according to solar panel and battery tension, call corresponding charging subprogram simultaneously; When standby battery tension is during lower than 6.5V, standby storage battery enters the floating charge stage, and when standby battery tension is during higher than 7.2V, standby storage battery stops charging; When main storage battery voltage is lower than 6.6V during higher than 6.0V, main storage battery enters the floating charge stage, and when main storage battery voltage is during higher than 7.2V, main storage battery stops charging; When main storage battery voltage is during lower than 6.0V, main storage battery stops load supplying being converted to standby storage battery power supply, and main storage battery enters soon and fills the charging stage.
the charging method of described visual low profile photovoltaic intelligent power supply, it is respectively quick charge stage and floating charge stage that storage battery has two charging stages, quick charge is that the solar panel adopting is directly added to the charging of storage battery two ends, and floating charge is the constant voltage charging method adopting; When the cloudy day, when the operating efficiency of solar panel is not high, by controller, controls DC/DC modular converter and select booster circuit, make solar panel continue to charge a battery; During fine day, A/D gathers the voltage of batteries to controller, controls DC/DC modular converter select corresponding charging circuit by controller, and control relay S1 selects corresponding charging accumulator and control relay S2 to select corresponding power supply storage battery.
beneficial effect:
1. advantage of the present invention has following three aspects: the one, overcome in the past the shortcomings such as the low and Ability of Resisting Disturbance of photovoltaic generating system capacity usage ratio is poor, and realize photovoltaic voltage stabilizing power supply, and also can realize power supply under the weak condition of solar panel illumination; The 2nd, can realize load uninterrupted power supply, have two kinds of patterns of direct current and Alternating Current Power Supply concurrently; The 3rd, extended service lifetime of accumulator short.The solar panel that the present invention adopts is to be interacted and directly produced electric energy by sunlight and material, there is no the consumption of fuel, water and other material, and the release that there is no the gases such as carbon dioxide, environmentally safe, regenerative resource, significant to alleviating of the improvement of biological environment and greenhouse gas.Can realize direct current, AC load uninterrupted power supply, for low-power load power supply places such as street lamps.And can adopt similar method to form a jumbo electric supply installation.
2. the present invention is in order to improve the utilance of solar panel, the useful life that extends storage battery and the reliability of raising to load supplying, the present invention adopts the cooperation of DC/DC modular converter and controller to improve the utilance of solar panel, by two storage batterys that configure, is divided into groups to extend the useful life of storage battery and is improved the reliability to load supplying.Imbody is as follows: 1, governor circuit design is ingenious, reduces the component number of device, has not only reduced the investment cost of photovoltaic power supply device, and has been convenient to later maintenance; 2, have visualization function, user can grasp system operation information in real time; 3, the shortcomings such as the low and Ability of Resisting Disturbance of photovoltaic power supply system capacity utilance is poor have been overcome in the past; 4, can realize load uninterrupted power supply, improve the reliability of load supplying; 5, by 51 single-chip microcomputer Real-Time Monitorings, reasonably management of battery running status, has extended service lifetime of accumulator effectively; 6, can realize DC load power supply and AC sine wave load supplying function, expand electric supply installation range of application.
3. DC/DC modular converter major function of the present invention is to realize filling soon and two stages of floating charge of batteries, and can make solar panel under low pressure realize charging, thereby improved the utilance of solar energy and solved the poor shortcoming of solar panel Ability of Resisting Disturbance.Adopt direct circuit, booster circuit and three kinds of circuit of reduction voltage circuit, to adjust the voltage of input power according to different charging modes, meet charge in batteries requirement.
4. batteries of the present invention has configured two storage batterys, there are following two advantages: the one, can improve preferably the utilance of solar panel,, when a storage battery is full of electricity, another piece storage battery is filled and is continued charging, thereby makes solar panel by day always in the charging stage; The 2nd, improve the reliability of load supplying, that is, when a storage battery power supply voltage is during lower than minimum discharge voltage, this storage battery will stop load supplying, then switches to another piece storage battery to load supplying, and then realizes load uninterrupted power supply.Two storage batterys have dividing of primary and secondary, and main storage battery is mainly to load supplying, and standby storage battery is mainly to controller power supply, but when main storage battery stops generating electricity, standby storage battery will be to load supplying.
accompanying drawing explanation:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is software programming flow charts of the present invention.
accompanying drawing 3 is circuit theory diagrams of the present invention.
accompanying drawing 4 is solar panel and power switching selected on-off circuit schematic diagrams thereof of the second portion of accompanying drawing 3.
accompanying drawing 5 is circuit theory diagrams of voltage stabilizing circuit of the 5th part of accompanying drawing 3.
accompanying drawing 6 is circuit theory diagrams of lifting circuit of the third part of accompanying drawing 3.
accompanying drawing 7 is circuit theory diagrams of accompanying drawing 3+5V accessory power supply.
accompanying drawing 8 is circuit theory diagrams of accompanying drawing 3+15V accessory power supply.
accompanying drawing 9 is circuit theory diagrams of the inverter circuit of accompanying drawing 3.
accompanying drawing 10 is controller circuitry schematic diagrams of the first of accompanying drawing 3.
accompanying drawing 11 be the tetrameric active and standby storage battery power supply circuit of accompanying drawing 3 and load output circuit theory diagrams.
embodiment:
embodiment 1:
a kind of visual low profile photovoltaic intelligent power supply, its composition comprises: solar panel 1, described solar panel respectively with AD sample circuit 2, DC/DC change-over circuit 3 connects, described DC/DC change-over circuit is connected with solar panel control switch 4, described solar panel control switch is connected with batteries, described batteries respectively with described AD sample circuit, voltage stabilizing circuit 5, the diverter switch 6 of AC/DC connects, controller 7 respectively with described DC/DC change-over circuit, LCDs 8, described AD sample circuit, described batteries, described voltage stabilizing circuit connects, the diverter switch of described AC/DC and inverter circuit 9, DC load 10, described inverter circuit and AC load 11.
embodiment 2:
according to the visual low profile photovoltaic intelligent power supply described in embodiment 1, described batteries comprises main storage battery 12, standby storage battery 13, described main storage battery is connected with the diverter switch of described AD sample circuit, described AC/DC respectively, described standby storage battery is connected with the diverter switch of described voltage stabilizing circuit, described AD sample circuit, described AC/DC respectively, and described solar panel control switch is connected with described main storage battery, described standby storage battery respectively.
embodiment 3:
according to the visual low profile photovoltaic intelligent power supply described in embodiment 1 or 2, it is kernel control chip that described inverter circuit be take the EG8010 of output SPWM signal, described inverter circuit is usingd IR2110 as driving chip, described controller circuitry comprises that STC89C52 single-chip microcomputer, A/D converter chip PCF8591, relay drive chip ULN2003A, and described LCDs adopts LCD1602.
embodiment 4:
the charging method of above-mentioned visual low profile photovoltaic intelligent power supply, the charging voltage that this device is set storage battery is 6.6V, according to Intensity of the sunlight automatic switch-over circuit, charge a battery, constantly by A/D, gather the voltage of storage battery, according to the variation of voltage, select different charging modes, and then realize the reasonable control to storage battery: first judge the voltage of standby battery, to ensure that standby battery has sufficient electric weight, once standby battery is without electricity, system will be ineffective; Next judges the voltage of main storage battery, selects the supply power mode of load according to the voltage of main storage battery, and above process adopts endless form to run without interruption; Control main program and mainly complete the initialization to I/O, timer, according to solar panel and battery tension, call corresponding charging subprogram simultaneously; When standby battery tension is during lower than 6.5V, standby storage battery enters the floating charge stage, and when standby battery tension is during higher than 7.2V, standby storage battery stops charging; When main storage battery voltage is lower than 6.6V during higher than 6.0V, main storage battery enters the floating charge stage, and when main storage battery voltage is during higher than 7.2V, main storage battery stops charging; When main storage battery voltage is during lower than 6.0V, main storage battery stops load supplying being converted to standby storage battery power supply, and main storage battery enters soon and fills the charging stage.
embodiment 5:
according to the charging method of the visual low profile photovoltaic intelligent power supply described in embodiment 4, it is respectively quick charge stage and floating charge stage that storage battery has two charging stages, quick charge is that the solar panel adopting is directly added to the charging of storage battery two ends, and floating charge is the constant voltage charging method adopting; When the cloudy day, when the operating efficiency of solar panel is not high, by controller, controls DC/DC modular converter and select booster circuit, make solar panel continue to charge a battery; During fine day, A/D gathers the voltage of batteries to controller, controls DC/DC modular converter select corresponding charging circuit by controller, and control relay S1 selects corresponding charging accumulator and control relay S2 to select corresponding power supply storage battery.
embodiment 6:
described visual low profile photovoltaic intelligent power supply, the EG8010 that inverter circuit design is exported SPWM signal is kernel control chip, usings IR2110 as driving chip, drives power MOSFET, by the DC inverter of storage battery output, be alternating current, thereby realize AC load power supply.
can realize the selection of modulation system by the connection of the different pins of design EG8010, the adjusting of electric voltage frequency, Dead Time function is set etc.; When IR2110 is driven to the periphery circuit design of chip, need emphasis to consider choosing of bootstrap capacitor, the selected 10uF of this device design, the electrochemical capacitor of 16V is as bootstrap capacitor.
control circuit design mainly comprises that STC89C52 single-chip microcomputer, A/D converter chip PCF8591 and relay drive chip ULN2003A and peripheral circuit thereof.Between STC89C52, there is no built-in A/D modular converter, therefore adopt 8 Bits Serial PCF8591 chips as A/D converter, from AIN0, AIN2 and AIN3 input, gather 3 road signals respectively, VREF reference voltage is used 5V, and SCL and SDA pin connect single- chip microcomputer 21,22 pins.Select ULN2003A chip drives 5V voltage-type electromagnetic relay, by one-chip machine port, export the adhesive of low and high level control relay, and then realize circuit switching.Intelligent controller is the core of whole device, and it and modules form the closed-loop control system of a voltage detecting, relay intelligent control.Also contain human-computer interaction interface simultaneously, comprise demonstration, the solar panel control switch of liquid crystal, diverter switch, solar panel work light, AC work light and the DC work light of AC/DC.Whether after visual low profile photovoltaic intelligent power supply starts, can select to control solar panel by solar panel control switch and come into operation, the diverter switch of AC/DC can manage AC and DC load supplying mode.What liquid crystal adopted is that LCD1602 shows, shows the voltage of solar panel, the voltage of main storage battery, the standby voltage of storage battery and the charging stage of active and standby storage battery.The master controller of this control system adopts the single-chip microcomputer of 8, in real time the voltage of modules is carried out to sample detecting, feeds back to master controller, the signal that single-chip microcomputer detects by acceptance, computing by analysis, controls relay corresponding to driver drives, and then realizes corresponding function.By rational software program, hardware circuit is controlled, thereby made the charging process high quality of storage battery, extend further the useful life of storage battery.
embodiment 7:
described visual low profile photovoltaic intelligent power supply, DC/DC modular converter comprises reduction voltage circuit, voltage stabilizing circuit, booster circuit.
the DC power supplier of mainly comprise+5V of auxiliary power circuit and+DC power supplier of 15V.The DC power supply of control chip EG8010 needs+5V in AC circuit, the DC power supply of need+15V of driving chip I R2110, can adopt L7805 and L7815CV as the chip of accessory power supply design.For+5V and+during the accessory power supply design of 15V, storage battery output voltage should be obtained by the chip LM2577-ADJ that boosts+24V voltage is as the input voltage of L7805 chip and L7815CV chip, obtain+5V and+accessory power supply of 15V, its key wiring diagram is as shown in Figure 7 and Figure 8.
as shown in Figure 9, inverter circuit part mainly comprises control drive circuit and accessory power supply two parts.Controlling drive circuit, to take the EG8010 that can export SPWM signal be kernel control chip, usings IR2110 as driving chip, drives power MOSFET, realizes single-phase full bridge inversion.Can realize the selection of modulation system by the connection of the different pins of design EG8010, the adjusting of electric voltage frequency, Dead Time function is set etc.; When IR2110 is driven to the periphery circuit design of chip, emphasis has been considered choosing of bootstrap capacitor, best with tantalum electric capacity, the also optional electrochemical capacitor of getting, and this design is chosen electrochemical capacitor as bootstrap capacitor.
be intelligent controller principle winding diagram as shown in figure 10, comprise that STC89C52 single-chip microcomputer, A/D converter chip PCF8591 and relay drive chip ULN2003A and peripheral circuit thereof.In STC89C52 single-chip microcomputer, there is no built-in A/D modular converter, therefore gathering voltage needs external A/D sampling module could access single-chip microcomputer.This design adopts 8 Bits Serial PCF8591 chips as A/D converter, needs the 3 road signals that gather respectively from AIN0, AIN2 and AIN3 input, and VREF reference voltage is used 5V, and SCL and SDA pin connect single- chip microcomputer 21,22 pins.Relay and drive circuit have been selected ULN2003A chip drives relay, relay is selected 5V voltage-type electromagnetic relay, 4 ports of STC89C52 single-chip microcomputer can be connected with ULN2003A input port arbitrarily, but require output to need corresponding one by one with input, by one-chip machine port, export the adhesive of low and high level control relay, thereby reach the selection to circuit.
Claims (5)
1. a visual low profile photovoltaic intelligent power supply, its composition comprises: solar panel, it is characterized in that: described solar panel respectively with AD sample circuit, DC/DC change-over circuit connects, described DC/DC change-over circuit is connected with solar panel control switch, described solar panel control switch is connected with batteries, described batteries respectively with described AD sample circuit, voltage stabilizing circuit, the diverter switch of AC/DC connects, controller respectively with described DC/DC change-over circuit, LCDs, described AD sample circuit, described batteries, described voltage stabilizing circuit connects, the diverter switch of described AC/DC and inverter circuit, DC load, described inverter circuit and AC load.
2. visual low profile photovoltaic intelligent power supply according to claim 1, it is characterized in that: described batteries comprises main storage battery, standby storage battery, described main storage battery is connected with the diverter switch of described AD sample circuit, described AC/DC respectively, described standby storage battery is connected with the diverter switch of described voltage stabilizing circuit, described AD sample circuit, described AC/DC respectively, and described solar panel control switch is connected with described main storage battery, described standby storage battery respectively.
3. visual low profile photovoltaic intelligent power supply according to claim 1 and 2, it is characterized in that: it is kernel control chip that described inverter circuit be take the EG8010 of output SPWM signal, described inverter circuit is usingd IR2110 as driving chip, described controller circuitry comprises that STC89C52 single-chip microcomputer, A/D converter chip PCF8591, relay drive chip ULN2003A, and described LCDs adopts LCD1602.
4. the charging method of the described visual low profile photovoltaic intelligent power supply of one of claims 1 to 3, it is characterized in that: the charging voltage that this device is set storage battery is 6.6V, according to Intensity of the sunlight automatic switch-over circuit, charge a battery, constantly by A/D, gather the voltage of storage battery, according to the variation of voltage, select different charging modes, and then the reasonable control of realization to storage battery: the voltage that first judges standby battery, to ensure that standby battery has sufficient electric weight, once standby battery is without electricity, system will be ineffective; Next judges the voltage of main storage battery, selects the supply power mode of load according to the voltage of main storage battery, and above process adopts endless form to run without interruption; Control main program and mainly complete the initialization to I/O, timer, according to solar panel and battery tension, call corresponding charging subprogram simultaneously; When standby battery tension is during lower than 6.5V, standby storage battery enters the floating charge stage, and when standby battery tension is during higher than 7.2V, standby storage battery stops charging; When main storage battery voltage is lower than 6.6V during higher than 6.0V, main storage battery enters the floating charge stage, and when main storage battery voltage is during higher than 7.2V, main storage battery stops charging; When main storage battery voltage is during lower than 6.0V, main storage battery stops load supplying being converted to standby storage battery power supply, and main storage battery enters soon and fills the charging stage.
5. the charging method of visual low profile photovoltaic intelligent power supply according to claim 4, it is characterized in that: it is respectively quick charge stage and floating charge stage that storage battery has two charging stages, quick charge is that the solar panel adopting is directly added to the charging of storage battery two ends, and floating charge is the constant voltage charging method adopting; When the cloudy day, when the operating efficiency of solar panel is not high, by controller, controls DC/DC modular converter and select booster circuit, make solar panel continue to charge a battery; During fine day, A/D gathers the voltage of batteries to controller, controls DC/DC modular converter select corresponding charging circuit by controller, and control relay S1 selects corresponding charging accumulator and control relay S2 to select corresponding power supply storage battery.
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| CN105239316A (en) * | 2015-11-22 | 2016-01-13 | 镇江市双利光电科技有限公司 | Solar washing machine |
| CN106295471A (en) * | 2015-05-24 | 2017-01-04 | 江西恒盛晶微技术有限公司 | A kind of embedded bio characteristic information acquisition system based on DSP |
| CN106712262A (en) * | 2017-03-28 | 2017-05-24 | 长沙云涯电子科技有限责任公司 | Solar backup power supply of emergency broadcast and charging method of solar backup power supply |
| CN107896000A (en) * | 2017-12-27 | 2018-04-10 | 佛山市众盈电子有限公司 | One kind monitors uninterrupted dc source |
| CN108565944A (en) * | 2017-12-15 | 2018-09-21 | 中建材浚鑫科技有限公司 | Solar street light charge-discharge control system |
| CN108964275A (en) * | 2018-07-18 | 2018-12-07 | 合肥学院 | Long-range photovoltaic inverting system and its control method based on EG8010 |
| CN114285055A (en) * | 2021-12-30 | 2022-04-05 | 金名正元（北京）科技有限公司 | Intelligent power supply management method combining wind-solar power generation |
| CN115062806A (en) * | 2022-08-18 | 2022-09-16 | 山东龙普太阳能股份有限公司 | Solar data monitoring and management system and method |
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