CN202495780U - Wide input voltage intelligent photovoltaic charging control system with MPPT function - Google Patents
Wide input voltage intelligent photovoltaic charging control system with MPPT function Download PDFInfo
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- CN202495780U CN202495780U CN 201220035862 CN201220035862U CN202495780U CN 202495780 U CN202495780 U CN 202495780U CN 201220035862 CN201220035862 CN 201220035862 CN 201220035862 U CN201220035862 U CN 201220035862U CN 202495780 U CN202495780 U CN 202495780U
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- circuit
- voltage
- mppt
- intelligent photovoltaic
- switch
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- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses a wide input voltage intelligent photovoltaic charging control system with MPPT function, comprising a solar array and a storage battery, wherein the solar array is connected with a buck-boost circuit which is connected with a charging circuit which is connected with the storage battery. The wide input voltage intelligent photovoltaic charging control system with MPPT function further comprises a single chip microcomputer controller which is connected with the charging circuit, wherein the output end of the charging circuit feeds back to the single chip microcomputer controller through a current and voltage detection circuit, and the single chip microcomputer controller is connected to the buck-boost circuit through a switch PWM control circuit. The storage battery is further connected with a temperature sensor used for monitoring the surface temperature of the storage battery in real time, and the temperature sensor is connected to a single chip microcomputer control circuit which is further connected to a liquid crystal module for displaying and alarming. The wide input voltage intelligent photovoltaic charging control system with MPPT function provided by the utility model is capable of charging a 12-volt battery at a preset mode in the range of 5 to 26 volts and works stably and reliably.
Description
Technical field
The utility model relates to a kind of photovoltaic charged system, and the concrete wide voltage that relates to a kind of MPPT of possessing function is imported intelligent photovoltaic charged control system.
Background technology
Solar energy is a kind of regenerative resource of cleaning, and is inexhaustible.Relevant scholarly forecast, global photovoltaic generation amount will account for about 26% of the world's gross generation the year two thousand forty, and solar energy will become the pillar of world energy sources after the year two thousand fifty.But the photoelectric conversion efficiency of solar cell is lower at present, adds the loss of circuit system, and its overall efficiency has only about 11%, is one of key issue of solar energy utilization so how to improve the efficient of photovoltaic system.As the energy-storage travelling wave tube in the photovoltaic charge-discharge system; Storage battery generates the lead sulfate crystallization that is difficult to convert into active material easily on pole plate when constant voltage or constant current charge; Cause that storage battery conductivity is bad, resistance is big, solubility and dissolution velocity are little, have a strong impact on its useful life.
Solar panel is a kind of semiconductor device that can absorb sunlight and be converted into electric energy; As shown in Figure 1 with output voltage-current characteristic resulting equivalent electric circuit according to its internal structure, it is gone here and there a resistance again by a parallelly connected diode of current source that receives light intensity and temperature effect and forms.
The maximum power point of solar panel receives the influence of intensity of illumination and cell panel working temperature at that time, and its maximum power point is different under the different illumination intensity, and is as shown in Figure 2.Among Fig. 2, S representes intensity of illumination, and W, V and I represent power output, output voltage and the electric current of solar panel respectively.Can know that by Fig. 2 when solar panel always worked in maximum power point, its output energy reached maximum.Thereby, need the control corresponding algorithm under fast-changing weather condition, effectively to follow the tracks of maximum power point, make cell panel be operated in as much as possible on the maximum power point, be the MPPT algorithm.
According to Thevenin's theorem; With the simple equivalence of solar cell is the series connection of a desirable direct voltage source
and a source resistance r; As shown in Figure 3, the resistance of the voltage of this direct voltage source and series connection changes certainly.
The power that a certain moment load resistance
is obtained:
（1）
Formula (1) both sides can get
differentiate:
（2）
By the formula (2) shows that: When
when
Output power P reaches a maximum.
Because when solar panel received light intensity, temperature, angle of incidence of sunlight etc. and influences, its output voltage, output current and internal resistance constantly changed, thereby have only dynamic change load equivalent resistance, could make the power output of solar panel reach the highest.
The utility model content
The photovoltaic charger conversion efficiency is low in the prior art, storage battery conductivity is bad, resistance is big in order to overcome; Some other shortcoming of the little and common photovoltaic charge controller of solubility and dissolution velocity; The utility model utilizes the MPPT algorithm to improve the integral light photoelectric transformation efficiency of system; The pulse current charge pattern can be slowed down the sulphation crystallization process, repaired impaired storage battery, prolongs its useful life effectively.In addition, the real-time monitoring and the excess temperature of accumulator meter surface temperature stop charge function automatically, make charging process be in a safe condition all the time.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model has adopted following technical scheme:
A kind of wide voltage of the MPPT of possessing function is imported intelligent photovoltaic charged control system; Comprise solar battery array and storage battery; Said solar battery array is connected with step-up/step-down circuit; Said step-up/step-down circuit connects the charging circuit with pulse current charge function, and said charging circuit connects said storage battery; Also comprise singlechip controller; Said singlechip controller connects said charging circuit; Being used to control the charge mode that charging circuit carries out difference in functionality charges; Comprise quick charge, pulse current charge, floating charge and stop charging automatically; The output of said charging circuit feeds back to said singlechip controller through the current/voltage testing circuit, and said singlechip controller also is connected to said step-up/step-down circuit through the switch PWM control circuit, and said switch PWM control circuit changes the equivalent resistance of loading section through the pulse duty factor of by-pass cock pipe.
Further, said storage battery also is connected with the temperature sensor that is used for monitoring in real time the accumulator meter surface temperature, and said temperature sensor connects said single chip machine controlling circuit; Said temperature sensor is the surface temperature of the said storage battery of monitoring in real time, and charging process is in a safe condition all the time, when its surface temperature surpasses 45 ℃, stops charging automatically.
Further, said single chip machine controlling circuit also connects one and is used to the Liquid Crystal Module that shows and report to the police.
Compared with prior art, the utlity model has following advantage:
(1) the utility model adopts the MPPT algorithm, and system's photoelectric conversion efficiency is high;
(2) through step-up/step-down circuit, realize wide voltage input, can in the 5V-26V input voltage range, realize charge function;
Have quick charge, pulse current charge, floating charge function when (3) charging, effectively postpone the useful life of storage battery;
(4) automatic charge closing when battery temp reaches set point, safe charging and protection storage battery;
(5) through test repeatedly, it is reliable that the wide voltage of the utility model is imported intelligent photovoltaic charged control system working stability.
Above-mentioned explanation only is the general introduction of the utility model technical scheme, in order more to know the technological means of understanding the utility model, and can implement according to the content of specification, below with the preferred embodiment of the utility model and conjunction with figs. specify as after.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the solar panel equivalent circuit diagram.
Fig. 2 is the power output and the output voltage current relationship figure of solar panel.
Fig. 3 is the linear system circuit diagram.
Fig. 4 imports the complete schematic of intelligent photovoltaic charged system for the wide voltage that possesses the MPPT function of the utility model.
Fig. 5 imports the step-up/step-down circuit schematic diagram of intelligent photovoltaic charged system for the wide voltage that possesses the MPPT function of the utility model.
Fig. 6 imports the charging circuit schematic diagram of intelligent photovoltaic charged system for the wide voltage that possesses the MPPT function of the utility model.
Fig. 7 imports the voltage and current detection circuit schematic diagram of intelligent photovoltaic charged system for the wide voltage that possesses the MPPT function of the utility model; Wherein, Fig. 7 (a) is the voltage detecting circuit schematic diagram; Fig. 7 (b) is the electric circuit inspection circuit theory diagrams.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the utility model.
Referring to shown in Figure 4; A kind of wide voltage of the MPPT of possessing function is imported intelligent photovoltaic charged control system; Comprise solar battery array 8 and storage battery 9; Said solar battery array 8 is connected with step-up/step-down circuit 1, and said step-up/step-down circuit 1 connects the charging circuit 2 with pulse current charge function, and said charging circuit 2 connects said storage battery 9; Also comprise singlechip controller 6; Said singlechip controller 6 connects said charging circuit 2; Being used to control the charge mode that charging circuit carries out difference in functionality charges; Comprise quick charge, pulse current charge, floating charge and stop charging automatically; The output of said charging circuit 2 feeds back to said singlechip controller 6 through current/voltage testing circuit 3, and said singlechip controller 6 also is connected to said step-up/step-down circuit 1 through switch PWM control circuit 4, and said switch PWM control circuit 4 changes the equivalent resistance of loading section through the pulse duty factor of by-pass cock pipe.
Further, said storage battery 9 also is connected with the temperature sensor 7 that is used for monitoring in real time the accumulator meter surface temperature, and said temperature sensor 7 connects said single chip machine controlling circuit 6; Said temperature sensor 6 is the surface temperature of the said storage battery 9 of monitoring in real time, and charging process is in a safe condition all the time, when its surface temperature surpasses 45 ℃, stops charging automatically.
Further, said single chip machine controlling circuit 6 also connects one and is used to the Liquid Crystal Module 5 that shows and report to the police, and said Liquid Crystal Module 5 connects said temperature sensor 7.
Referring to shown in Figure 5; Said step-up/step-down circuit 1 comprises the boost-voltage regulator circuit 101 and the main switching voltage regulating circuit 102 that is made up of regulator U2 that mainly is made up of boost-voltage regulator U1, and the output of said boost-voltage regulator circuit 101 connects the input of said switching voltage regulating circuit 102; The input of said boost-voltage regulator circuit 101 is connected with the first voltage-stabiliser tube D1, and output is connected with the luminous branch road that is made up of light-emitting diode D2 and resistance series connection; The feedback end of said switching voltage regulating circuit 102 is an adjustable resistance R_adj, and the end of said adjustable resistance R_adj is through grounding through resistance, and the other end passes through capacity earth.
Referring to shown in Figure 6; Said charging circuit 2 mainly is made up of the current source U3 of adjustable output switching mode synchronous rectifier; Be connected with first resistance R 1 through second switch J2 and the 3rd switch J3 between negative comparator input terminal CS-of the current detecting of the current source U3 of said adjustable output switching mode synchronous rectifier and the positive current detection comparator input CS+; And be connected with second resistance R 2 through the 4th switch J4 and the 5th switch J5; Cross-over connection has the first switch J1 on said first resistance R 1, and cross-over connection has the 6th switch J6 on said second resistance R 2.
Preferably, the current source U3 of said adjustable output switching mode synchronous rectifier is MAX1640 integrated chip or MAX1641 integrated chip.
When the current source U3 of said adjustable output switching mode synchronous rectifier is the MAX1640 integrated chip, need the first switch J1, the 4th switch J4, the 5th J5 switch be broken off second switch J2, the 3rd switch J3, the 6th switch J6 closure; When the current source U3 of said adjustable output switching mode synchronous rectifier is the MAX1641 integrated chip, need be with the first switch J1, the 4th switch J4, the 5th J5 switch closure, second switch J2, the 3rd switch J3, the 6th switch J6 break off.
Referring to shown in Figure 7, said current/voltage testing circuit 3 comprises current detection circuit, voltage detecting circuit and A/D change-over circuit, and said A/D change-over circuit is used for the collection of electric current and voltage.Said current detection circuit mainly comprises the differential input operational amplifier U4 of first two-way, shown in Fig. 7 (a).Said voltage detecting circuit mainly comprises the differential input operational amplifier U5 of second two-way, shown in Fig. 7 (b).
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (10)
1. the wide voltage that possesses the MPPT function is imported intelligent photovoltaic charged control system; Comprise solar battery array (8) and storage battery (9); It is characterized in that: said solar battery array (8) is connected with the step-up/step-down circuit (1) of the voltage stabilizing input that is used to realize the solar panel output voltage; Said step-up/step-down circuit (1) connects the charging circuit (2) with pulse current charge function, and said charging circuit (2) connects said storage battery (9); Also comprise singlechip controller (6); Said singlechip controller (6) connects said charging circuit (2); Being used to control the charge mode that charging circuit carries out difference in functionality charges; Comprise quick charge, pulse current charge, floating charge and stop charging automatically; The output of said charging circuit (2) feeds back to said singlechip controller (6) through current/voltage testing circuit (3), and said singlechip controller (6) also is connected to said step-up/step-down circuit (1) through switch PWM control circuit (4), and said switch PWM control circuit (4) changes the equivalent resistance of loading section through the pulse duty factor of by-pass cock pipe.
2. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system; It is characterized in that: said storage battery (9) also is connected with the temperature sensor (7) that is used for monitoring in real time the accumulator meter surface temperature, and said temperature sensor (7) connects said single chip machine controlling circuit (6).
3. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system, it is characterized in that: said single chip machine controlling circuit (6) also connects one and is used to the Liquid Crystal Module (5) that shows and report to the police.
4. the wide voltage of the MPPT of possessing function according to claim 2 is imported intelligent photovoltaic charged control system, it is characterized in that: said single chip machine controlling circuit (6) also connects one and is used to the Liquid Crystal Module (5) that shows and report to the police.
5. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system; It is characterized in that: said step-up/step-down circuit (1) comprise mainly the boost-voltage regulator circuit (101) that constitutes by boost-voltage regulator (U1) with mainly by the switching voltage regulating circuit (102) of regulator (U2) formation, the output of said boost-voltage regulator circuit (101) connects the input of said switching voltage regulating circuit (102); The input of said boost-voltage regulator circuit (101) is connected with first voltage-stabiliser tube (D1), and output is connected with the luminous branch road that is made up of light-emitting diode (D2) and resistance series connection; The feedback end of said switching voltage regulating circuit (102) is an adjustable resistance (R_adj), and an end of said adjustable resistance (R_adj) is through grounding through resistance, and the other end passes through capacity earth.
6. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system; It is characterized in that: said charging circuit (2) mainly is made up of the current source (U3) of adjustable output switching mode synchronous rectifier; Be connected with first resistance (R1) through second switch (J2) and the 3rd switch (J3) between negative comparator input terminal (CS-) of the current detecting of the current source (U3) of said adjustable output switching mode synchronous rectifier and the positive current detection comparator input (CS+); And be connected with second resistance (R2) through the 4th switch (J4) and the 5th switch (J5); Said first resistance (R1) is gone up cross-over connection has first switch (J1), and said second resistance (R2) is gone up cross-over connection has the 6th switch (J6).
7. import intelligent photovoltaic charged control system according to the wide voltage of the described MPPT of the possessing function of claim 6, it is characterized in that: the current source (U3) of said adjustable output switching mode synchronous rectifier is MAX1640 integrated chip or MAX1641 integrated chip.
8. import intelligent photovoltaic charged control system according to the wide voltage of each the described MPPT of possessing function in the claim 1 to 7, it is characterized in that: said current/voltage testing circuit (3) comprises current detection circuit and voltage detecting circuit.
9. the wide voltage of the MPPT of possessing function according to claim 8 is imported intelligent photovoltaic charged control system, it is characterized in that: said current detection circuit mainly comprises the differential input operational amplifier of first two-way (U4).
10. the wide voltage of the MPPT of possessing function according to claim 8 is imported intelligent photovoltaic charged control system, it is characterized in that: said voltage detecting circuit mainly comprises the differential input operational amplifier of second two-way (U5).
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| CN 201220035862 CN202495780U (en) | 2012-02-06 | 2012-02-06 | Wide input voltage intelligent photovoltaic charging control system with MPPT function |
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| CN 201220035862 CN202495780U (en) | 2012-02-06 | 2012-02-06 | Wide input voltage intelligent photovoltaic charging control system with MPPT function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529898A (en) * | 2013-07-22 | 2014-01-22 | 北京吉阳技术股份有限公司 | Maximum power point tracing control method applied to photovoltaic charging system |
| CN104868543A (en) * | 2015-05-20 | 2015-08-26 | 重庆大学 | Intelligent battery charger with wider input voltage scope |
| CN105844868A (en) * | 2016-05-24 | 2016-08-10 | 上海海事大学 | Anti-loss USB flash disk with characteristic of bluetooth searching |
| CN106356916A (en) * | 2016-08-31 | 2017-01-25 | 苏州迈力电器有限公司 | Solar charger for electric vehicle |
| CN111845418A (en) * | 2020-06-30 | 2020-10-30 | 深圳供电局有限公司 | Photovoltaic charging station |
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2012
- 2012-02-06 CN CN 201220035862 patent/CN202495780U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529898A (en) * | 2013-07-22 | 2014-01-22 | 北京吉阳技术股份有限公司 | Maximum power point tracing control method applied to photovoltaic charging system |
| CN103529898B (en) * | 2013-07-22 | 2015-08-12 | 北京吉阳技术股份有限公司 | A kind of control method being applied to the MPPT maximum power point tracking of photovoltaic charging system |
| CN104868543A (en) * | 2015-05-20 | 2015-08-26 | 重庆大学 | Intelligent battery charger with wider input voltage scope |
| CN105844868A (en) * | 2016-05-24 | 2016-08-10 | 上海海事大学 | Anti-loss USB flash disk with characteristic of bluetooth searching |
| CN106356916A (en) * | 2016-08-31 | 2017-01-25 | 苏州迈力电器有限公司 | Solar charger for electric vehicle |
| CN111845418A (en) * | 2020-06-30 | 2020-10-30 | 深圳供电局有限公司 | Photovoltaic charging station |
| CN111845418B (en) * | 2020-06-30 | 2022-03-22 | 深圳供电局有限公司 | Photovoltaic charging station |
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