CN102074990A - Solar system and charge-discharge control method thereof - Google Patents
Solar system and charge-discharge control method thereof Download PDFInfo
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- CN102074990A CN102074990A CN2011100205192A CN201110020519A CN102074990A CN 102074990 A CN102074990 A CN 102074990A CN 2011100205192 A CN2011100205192 A CN 2011100205192A CN 201110020519 A CN201110020519 A CN 201110020519A CN 102074990 A CN102074990 A CN 102074990A
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Abstract
The invention discloses a solar system and a charge-discharge control method thereof. The method comprises the following steps of: sampling current and voltage of a solar cell panel and a storage battery in real time through a solar charge-discharge controller and storing data in a memory module of the solar charge-discharge controller; when the system works normally, the charge capacity is less than the discharge capacity and the loaded voltage of the storage battery is less than a set limited value, getting the system into a climate energy saving mode; and when the weather turns better, and the loaded voltage of the storage battery is greater than the set limited value, newly getting the system into a normal working state. When the achievement of a certain limited value of the continuous cloudy and rainy days is detected, a control module is automatically switched into the climate energy saving mode, so that the working power consumption of a load is reduced to prolong the working time of a normal configuration system during the continuous cloudy and rainy days; thus the solar system can be guaranteed to continuously work in long-time cloudy and rainy severe weather to fulfill the aims of guaranteeing long-time working and reducing the configuration of the entire system.
Description
Technical field
The present invention relates to a kind of solar energy system and charge/discharge control method thereof, relate to a kind of solar panel and storage battery in particular and be used solar energy system that discharges and recharges and the control method that discharges and recharges thereof.
Background technology
Along with global environment runs down and non-renewable energy resources exhaustion day by day, people are increasing for the demand of cleaning, regenerative resource; At lighting field, in order to reduce the load of electric consumption on lighting to electrical network, increasing solar energy system begins to occur.
As shown in Figure 1, with the system 9 of solar energy, mainly form by solar panel 91, storage battery 92, solar charging/discharging controller 93, load 95 drive circuits and load 95 as energy supply; Sunlight 96 is converted into electric energy by solar panel 91, and be stored in the storage battery 92 by solar charging/discharging controller 93, when load 95 had power demands, the electric energy that stores in the storage battery 92 just arrived load 95 via solar charging/discharging controller 93, load 95 drive circuits and begins power supply.
Can satisfy actual work requirements in order to ensure solar electric power supply system, the regular solar system is set to 7 continuous overcast and rainy energy operate as normal usually.But because the global climate abnormality, bad weather appears in increasing place, even coastal in sunlight resource abundance also often has to surpass 10 days even two weeks overcast and rainy continuously, so the regular solar system can not satisfy actual work requirements; Particularly raining path and sliding brings traffic hidden danger and public security problem especially easily if night occurs the illumination disappearance.
At present if prolong the illuminator operating time, have only raising system configuration (promptly strengthening solar panel 91 power consumptions and storage battery 92 capacity) or reduce system power dissipation and realize.But, merely improve the cost (solar panel 91 and storage battery 92 are all relatively costly) that system configuration can greatly promote whole system, and reduce system power simply lighting quality is reduced, have potential safety hazard equally.
In view of this, the inventor has this case to produce at the above-mentioned defective further investigation of existing solar energy system 9 then.
Summary of the invention
First purpose of the present invention is to provide a kind of solar energy system, with solve solar energy system in the prior art need prolong illuminator can't integrated during the operating time low and the problem of eliminating safe hidden trouble.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of solar energy system, comprise solar panel, storage battery, solar charging/discharging controller, load driving circuits and load, this solar panel is converted into electric energy with sunlight and stores in the storage battery by the solar charging/discharging controller, and the electric energy of storage battery stored then arrives load via solar charging/discharging controller, load driving circuits when load has power demands; Wherein:
This solar charging/discharging controller has control module, first current sampling circuit, first voltage sampling circuit, second current sampling circuit, second voltage sampling circuit and memory module, this first current sampling circuit, first voltage sampling circuit, second current sampling circuit links to each other with control module by analog-to-digital conversion module respectively with second voltage sampling circuit, this first current sampling circuit and first voltage sampling circuit are gathered the electric current and the voltage of solar panel respectively in real time, and with the electric current that obtains respectively and voltage signal by being transferred to control module behind the corresponding analog-to-digital conversion module separately, and be stored in the memory module, this control module is then according to detected solar cell panel voltages, electric current and Time Calculation go out charge capacity; This second current sampling circuit and second voltage sampling circuit are gathered the electric current and the voltage of storage battery respectively in real time, and with the electric current that obtains respectively and voltage signal by being transferred to control module behind the corresponding analog-to-digital conversion module separately, and be stored in the memory module, this control module then goes out discharge electricity amount according to detected battery tension, electric current and Time Calculation;
This control module has normal mode of operation and weather energy saver mode, this control module switches to the weather energy saver mode by normal mode of operation when this charge capacity is pressed less than set point less than the band live of discharge electricity amount and storage battery, and switches to normal mode of operation by the weather energy saver mode when the band live of storage battery is pressed greater than set point.
Further, this storage battery is a lead acid accumulator.
Further, this memory module is the FLASH memory.
Second purpose of the present invention is to provide a kind of charge/discharge control method of solar energy system, thus can make solar energy system need prolong illuminator can integrated during the operating time low and the effect of eliminating safe hidden trouble.
A kind of charge/discharge control method of solar energy system wherein, comprises the steps:
A, solar charging/discharging controller carry out real-time current, voltage sample to solar panel and storage battery: first current sampling circuit and first voltage sampling circuit are gathered the electric current and the voltage of solar panel respectively in real time in the solar charging/discharging controller, the electric current and the voltage of second current sampling circuit and second voltage sampling circuit difference actual acquisition storage battery in the solar charging/discharging controller;
B, storage that sampling is obtained are in the memory module of solar charging/discharging controller: the signal that is collected by this first current sampling circuit, first voltage sampling circuit, second current sampling circuit and second voltage sampling circuit stores in the memory module respectively;
Control module is according to numerical computations charge capacity and discharge electricity amount in the memory module in C, the solar charging/discharging controller: the current value that obtains according to first current sampling circuit, magnitude of voltage and the time that first voltage sampling circuit obtains calculate charge capacity, and the current value that obtains according to second current sampling circuit, magnitude of voltage and the time that second voltage sampling circuit obtains calculate discharge electricity amount;
Control module is according to concerning between relation and/or battery band live pressure and the set point between charge capacity and the discharge electricity amount in D, the solar charging/discharging controller, determine the mode of operation of whole solar energy system: when this charge capacity is pressed less than set point less than the band live of discharge electricity amount and storage battery, this control module switches to the weather energy saver mode by normal mode of operation, and, switch to normal mode of operation by the weather energy saver mode when when the band live of storage battery is pressed greater than set point.
Further, this storage battery is a lead acid accumulator.
Further, this memory module is the FLASH memory.
Further, in the weather energy saver mode, the output current of load is according to the difference of upper limit maximum output current and lower limit minimum output current, and on year-on-year basis in the difference that opens control operating voltage and lower limit discharge voltage, control is exported in proportion.
After adopting said structure, a kind of solar energy system and the charge/discharge control method thereof that the present invention relates to, it carries out real-time current, voltage sample to solar panel and storage battery by this solar charging/discharging controller, and with storage in the memory module of solar charging/discharging controller; When system's operate as normal and charge capacity forced down in the limit value that sets less than the band live of discharge electricity amount and storage battery, system entered the weather energy saver mode; When the weather improvement, the band live of storage battery is pressed when being higher than the limit value that sets, and system changes normal operating conditions again over to.
So, the present invention is when detecting the lasting overcast and rainy time when reaching a threshold value, control module then is automatically changeb to the weather energy saver mode, thereby reduce the loaded work piece power consumption, prolong the operating time of normal configuration system during continuous wet weather with this, and when weather is normal, system can return to normal operating conditions again, so the solar electric power supply system that the present invention can guarantee normal configuration also can continuous firing at the overcast and rainy bad weather of long period, thereby reach the effect that not only guarantees long-term work but also reduce the whole system configuration.
Description of drawings
Fig. 1 is the principle schematic of a kind of solar energy system in the prior art;
Fig. 2 is the structural representation block diagram that the present invention relates to a kind of solar energy system;
Fig. 3 is the physical circuit figure of connected mode between solar charging/discharging controller, solar panel and the storage battery among the present invention;
Fig. 4 is the flow chart that the present invention relates to a kind of charge/discharge control method of solar energy system.
Among the figure:
Storage battery 2 solar charging/discharging controllers 3
First voltage sampling circuit, 33 second current sampling circuits 34
Second voltage sampling circuit, 35 memory modules 36
Analog-to-digital conversion module 37 load driving circuits 4
Load 5
Solar energy system 9 solar panels 91
Sunlight 96.
Embodiment
In order further to explain technical scheme of the present invention, the present invention will be described in detail below by specific embodiment.
As shown in Figure 2, a kind of solar energy system 100 shown in it for the present invention relates to, it comprises solar panel 1, storage battery 2, solar charging/discharging controller 3, load driving circuits 4 and load 5, this solar panel 1 is converted into electric energy with sunlight and stores in the storage battery 2 by solar charging/discharging controller 3, the electric energy of storage battery 2 stored then arrives load 5 via solar charging/discharging controller 3, load driving circuits 4 when load 5 has power demands, this storage battery 2 specifically is preferably lead acid accumulator 2; Above-mentioned feature and prior art are basic identical, thus it is not described respectively one by one, below the improvement of the present invention point be described in detail:
This solar charging/discharging controller 3 has control module 31, first current sampling circuit 32, first voltage sampling circuit 33, second current sampling circuit 34, second voltage sampling circuit 35 and memory module 36, this first current sampling circuit 32, first voltage sampling circuit 33, second current sampling circuit 34 links to each other with control module 31 by analog-to-digital conversion module 37 respectively with second voltage sampling circuit 35, this first current sampling circuit 32 and first voltage sampling circuit 33 are gathered the electric current and the voltage of solar panel 1 respectively in real time, and with the electric current that obtains respectively and voltage signal by being transferred to control module 31 behind the corresponding analog-to-digital conversion module 37 separately, and be stored in the memory module 36, this memory module 36 is preferably the FLASH memory; 31 of this control modules go out charge capacity according to detected solar panel 1 voltage, electric current and Time Calculation; This second current sampling circuit 34 and second voltage sampling circuit 35 are gathered the electric current and the voltage of storage battery 2 respectively in real time, and with the electric current that obtains respectively and voltage signal by being transferred to control module 31 behind the corresponding analog-to-digital conversion module 37 separately, and be stored in the memory module 36,31 of this control modules go out discharge electricity amount according to detected storage battery 2 voltages, electric current and Time Calculation;
This control module 31 has normal mode of operation and weather energy saver mode, when this charge capacity is pressed less than set point less than the band live of discharge electricity amount and storage battery 2, this control module 31 switches to the weather energy saver mode by normal mode of operation, when the band live of storage battery 2 was pressed greater than set point, this control module 31 switched to normal mode of operation by the weather energy saver mode.
Like this, the present invention carries out real-time current, voltage sample to solar panel 1 and storage battery 2 by this solar charging/discharging controller 3, and with storage in the memory module 36 of solar charging/discharging controller 3; When system's operate as normal and charge capacity forced down in the limit value that sets less than the band live of discharge electricity amount and storage battery 2, system entered the weather energy saver mode; When the weather improvement, the band live of storage battery 2 is pressed when being higher than the limit value that sets, and system changes normal operating conditions again over to.So, the present invention is when detecting the lasting overcast and rainy time when reaching a threshold value, 31 of control modules are automatically changeb to the weather energy saver mode, thereby reduce the loaded work piece power consumption, prolong the operating time of normal configuration system during continuous wet weather with this, and when weather is normal, system can return to normal operating conditions again, so the solar electric power supply system that the present invention can guarantee normal configuration also can continuous firing at the overcast and rainy bad weather of long period, thereby reach the effect that not only guarantees long-term work but also reduce the whole system configuration.
As shown in Figure 3, it is the physical circuit figure of connected mode between solar charging/discharging controller 3 in the embodiment of the invention, solar panel 1 and the storage battery 2.
Solar charging/discharging controller 3 is by resistance R 1, R6 takes a sample to solar panel 1SL1 dividing potential drop, sampling voltage is sent into AD converter (being integrated among the microprocessor U2), data after AD converter will be changed are again sent into microprocessor U2, finish the data acquisition to solar panel 1SL1 voltage; Wherein microprocessor U2 is control module 31, resistance R 1, and R6 promptly forms first voltage sampling circuit 33;
By resistance R 3, R7 sends sampling voltage into AD converter (being integrated in microprocessor U2) to the sampling of lead acid accumulator BT1 dividing potential drop, and the data after AD converter will be changed are again sent into microprocessor U2, finish the data acquisition to storage battery BT1 voltage; Wherein resistance R 3, and R7 promptly forms second voltage sampling circuit 35;
By alloy inspection leakage resistance R8, detected lead acid accumulator BT1 output current small-signal is sent into operational amplifier U3A, operational amplifier U3A sends into AD converter (being integrated in microprocessor U2) after signal is amplified, data after AD converter will be changed are again sent into microprocessor U2, finish the data acquisition to storage battery BT1 output current; Wherein alloy inspection leakage resistance R8 promptly is equivalent to second current sampling circuit 34 at this;
By alloy inspection leakage resistance R8, detected solar panel 1SL1 charging current small-signal is sent into operational amplifier U3B, operational amplifier U3B sends into AD converter (being integrated in microprocessor U2) after signal is amplified, data after AD converter will be changed are again sent into microprocessor U2, finish the data acquisition to solar panel 1SL1 charging current; Wherein alloy inspection leakage resistance R8 promptly is equivalent to first current sampling circuit 32 at this;
During charging, microprocessor U2 is kept at the solar panel 1SL1 voltage U 1 of gathering in the FLASH memory, and upgrades constantly; Microprocessor U2 is kept at the solar panel 1SL1 electric current I 1 of gathering in the FLASH memory, and upgrades constantly.With the voltage U 1 at every turn upgraded and electric current I 1 multiply each other gained as a result power P 1 preserve, with power P 1 and time T 1 mutually behind the multiply accumulating gained as a result electric weight Q1 be kept in the FLASH memory;
During discharge, microprocessor U2 is kept at the lead acid accumulator BT1 voltage U 2 of gathering in the FLASH memory, and upgrades constantly; Microprocessor U2 is kept at the lead acid accumulator BT1 electric current I 2 of gathering in the FLASH memory, and upgrades constantly.With the voltage U 2 at every turn upgraded and electric current I 2 multiply each other gained as a result power P 2 preserve, with power P 2 and time T 2 mutually behind the multiply accumulating gained as a result electric weight Q2 be kept in the FLASH memory;
When charge capacity Q1 presses less than (set point) less than the band live of discharge electricity amount Q2 and lead acid accumulator BT1, system then enters the weather energy saver mode, its light fixture output current will be according to the difference of upper limit maximum output current (parameter is set) with lower limit minimum output current (parameter is set), in the difference that opens control operating voltage and lower limit discharge voltage (parameter+temperature-compensating is set), control is exported in proportion on year-on-year basis; When the band live of lead acid accumulator BT1 was pressed greater than (set point), system reentered normal mode of operation.
As shown in Figure 4, be the charge/discharge control method of a kind of solar energy system 100 of the present invention shown in it, wherein, comprise the steps:
A, 3 pairs of solar panels 1 of solar charging/discharging controller and storage battery 2 carry out real-time current, voltage sample: first current sampling circuit 32 and first voltage sampling circuit 33 are gathered the electric current and the voltage of solar panel 1 respectively in real time in the solar charging/discharging controller 3, the electric current and the voltage of second current sampling circuit 34 and second voltage sampling circuit, 35 difference actual acquisition storage batterys 2 in the solar charging/discharging controller 3;
B, storage that sampling is obtained are in the memory module 36 of solar charging/discharging controller 3: the signal that is collected by this first current sampling circuit 32, first voltage sampling circuit 33, second current sampling circuit 34 and second voltage sampling circuit 35 stores into respectively in the memory module 36, concrete, this memory module 36 is the FLASH memory;
The foregoing description and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (7)
1. solar energy system, comprise solar panel, storage battery, solar charging/discharging controller, load driving circuits and load, this solar panel is converted into electric energy with sunlight and stores in the storage battery by the solar charging/discharging controller, and the electric energy of storage battery stored then arrives load via solar charging/discharging controller, load driving circuits when load has power demands; It is characterized in that:
This solar charging/discharging controller has control module, first current sampling circuit, first voltage sampling circuit, second current sampling circuit, second voltage sampling circuit and memory module, this first current sampling circuit, first voltage sampling circuit, second current sampling circuit links to each other with control module by analog-to-digital conversion module respectively with second voltage sampling circuit, this first current sampling circuit and first voltage sampling circuit are gathered the electric current and the voltage of solar panel respectively in real time, and with the electric current that obtains respectively and voltage signal by being transferred to control module behind the corresponding analog-to-digital conversion module separately, and be stored in the memory module, this control module is then according to detected solar cell panel voltages, electric current and Time Calculation go out charge capacity; This second current sampling circuit and second voltage sampling circuit are gathered the electric current and the voltage of storage battery respectively in real time, and with the electric current that obtains respectively and voltage signal by being transferred to control module behind the corresponding analog-to-digital conversion module separately, and be stored in the memory module, this control module then goes out discharge electricity amount according to detected battery tension, electric current and Time Calculation;
This control module has normal mode of operation and weather energy saver mode, this control module switches to the weather energy saver mode by normal mode of operation when this charge capacity is pressed less than set point less than the band live of discharge electricity amount and storage battery, and switches to normal mode of operation by the weather energy saver mode when the band live of storage battery is pressed greater than set point.
2. a kind of solar energy system as claimed in claim 1 is characterized in that, this storage battery is a lead acid accumulator.
3. a kind of solar energy system as claimed in claim 1 is characterized in that, this memory module is the FLASH memory.
4. the charge/discharge control method of a solar energy system is characterized in that, comprises the steps:
A, solar charging/discharging controller carry out real-time current, voltage sample to solar panel and storage battery: first current sampling circuit and first voltage sampling circuit are gathered the electric current and the voltage of solar panel respectively in real time in the solar charging/discharging controller, the electric current and the voltage of second current sampling circuit and second voltage sampling circuit difference actual acquisition storage battery in the solar charging/discharging controller;
B, storage that sampling is obtained are in the memory module of solar charging/discharging controller: the signal that is collected by this first current sampling circuit, first voltage sampling circuit, second current sampling circuit and second voltage sampling circuit stores in the memory module respectively;
Control module is according to numerical computations charge capacity and discharge electricity amount in the memory module in C, the solar charging/discharging controller: the current value that obtains according to first current sampling circuit, magnitude of voltage and the time that first voltage sampling circuit obtains calculate charge capacity, and the current value that obtains according to second current sampling circuit, magnitude of voltage and the time that second voltage sampling circuit obtains calculate discharge electricity amount;
Control module is according to concerning between relation and/or battery band live pressure and the set point between charge capacity and the discharge electricity amount in D, the solar charging/discharging controller, determine the mode of operation of whole solar energy system: when this charge capacity is pressed less than set point less than the band live of discharge electricity amount and storage battery, this control module switches to the weather energy saver mode by normal mode of operation, and, switch to normal mode of operation by the weather energy saver mode when when the band live of storage battery is pressed greater than set point.
5. the charge/discharge control method of a kind of solar energy system as claimed in claim 4 is characterized in that, this storage battery is a lead acid accumulator.
6. the charge/discharge control method of a kind of solar energy system as claimed in claim 4 is characterized in that, this memory module is the FLASH memory.
7. the charge/discharge control method of a kind of solar energy system as claimed in claim 4, it is characterized in that, in the weather energy saver mode, the output current of load is according to the difference of upper limit maximum output current and lower limit minimum output current, in the difference that opens control operating voltage and lower limit discharge voltage, control is exported in proportion on year-on-year basis.
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| CN2011100205192A CN102074990A (en) | 2011-01-18 | 2011-01-18 | Solar system and charge-discharge control method thereof |
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| CN103718618A (en) * | 2011-09-12 | 2014-04-09 | 苹果公司 | Monitoring battery in portable electronic device |
| CN104980101A (en) * | 2015-07-10 | 2015-10-14 | 广州奥鹏能源科技有限公司 | Intelligent solar cell controller and method |
| CN108565907A (en) * | 2018-02-06 | 2018-09-21 | 青岛天盈华智科技有限公司 | A kind of charge/discharge control method, device, equipment and system |
| CN111913110A (en) * | 2019-05-10 | 2020-11-10 | 维谛技术有限公司 | Commercial power battery configuration evaluation method and system |
| CN112512174A (en) * | 2019-08-26 | 2021-03-16 | 湖南耐普恩科技有限公司 | Photovoltaic street lamp control device and photovoltaic street lamp equipment |
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Application publication date: 20110525 |