CN202167865U - Charging controller with photovoltaic maximum power output - Google Patents
Charging controller with photovoltaic maximum power output Download PDFInfo
- Publication number
- CN202167865U CN202167865U CN2011200917099U CN201120091709U CN202167865U CN 202167865 U CN202167865 U CN 202167865U CN 2011200917099 U CN2011200917099 U CN 2011200917099U CN 201120091709 U CN201120091709 U CN 201120091709U CN 202167865 U CN202167865 U CN 202167865U
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- circuit
- buck
- output
- boost
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model belongs to the field of photovoltaic power generation, discloses a charging controller with photovoltaic maximum power output, and comprises a solar battery plate (PV), a BUCK/BOOST (buck chopper and a boost chopper) circuit, a charging circuit, a voltage detection circuit, a single chip microcomputer (MCU), a driving circuit and a storage battery. The input end of the BUCK/BOOST circuit is connected with the solar battery plate (PV), the output end of the BUCK/BOOST circuit is connected with the voltage detection circuit and the charging circuit, and the output end of the charging circuit is connected with the storage battery. The output end of the voltage detection circuit is connected with the single chip microcomputer (MCU), the output end of the single chip microcomputer (MCU) is connected with the driving circuit and the charging circuit, and the output end of the driving circuit is connected with the BUCK/BOOST circuit. Duty ratio of pulse width modulation (PWM) wave shape can be changed in real time according to the output situation of a photovoltaic battery, load impedance of the solar battery plate can be adjusted in real time, and the maximum power output of the photovoltaic battery can be achieved.
Description
Technical field
The utility model relates to a kind of charge controller of following the trail of maximum power of photovoltaic cell output, belongs to field of photovoltaic power generation.
Background technology
Charge controller is to connect photovoltaic array and hinge with electric loading.Comparatively ripe in the market perfect charge controller adopts PWM (Pulse Width Modulation); It is pulse-width-modulated mode; Yet often can not make photovoltaic array be operated in its maximum power point (Maximum Power Point under this pattern; MPP), cause the loss of energy.In order to improve rate of energy, need take the power output of certain control method real-time tracing photovoltaic array, the load of adjustment photovoltaic cell makes battery can be operated in the two optimal match point, promptly on the maximum power point.
Summary of the invention
The purpose of the utility model provides a kind of simple and reliable maximum power output charge controller.
The utility model adopts following technical scheme for realizing above-mentioned purpose:
The utility model is a kind of maximum power output charge controller that is applied to photovoltaic generating system, comprises solar panel (PV), BUCK/BOOST (buck/boost chopper) circuit, charging circuit, voltage detecting circuit, single-chip microcomputer (MCU), drive circuit, storage battery.Wherein the input termination solar panel (PV) of BUCK/BOOST circuit is exported termination voltage detecting circuit and charging circuit; The output termination storage battery of charging circuit; The output of voltage detecting circuit connects single-chip microcomputer (MCU); The output termination drive circuit and the charging circuit of single-chip microcomputer (MCU); The output of drive circuit connects the BUCK/BOOST circuit.The electric energy of photovoltaic cell output carries out the buck/boost conversion through BUCK/BOOST, makes voltage reach suitable value, and charges a battery through charging circuit; The value that single-chip microcomputer reads voltage detecting circuit feedback and set point relatively, and the duty that changes output PWM waveform recently controls the BUCK/BOOST circuit, reaches that adjustment voltage is exported and the effect of load impedance.
The beneficial effect of the utility model is: can real time altering PWM waveform duty cycle according to photovoltaic cell output situation, and adjust the load impedance of solar panel in real time, can make photovoltaic cell reach maximum power output.
Description of drawings
Fig. 1 is that the principle of the utility model connects block diagram.
Fig. 2 is the BUCK/BOOST circuit theory diagrams.
Specific embodiments
Be elaborated below in conjunction with the technical scheme of accompanying drawing to the utility model:
Fig. 1 is principle connection side's block diagram of the utility model.As shown in the figure, the maximum power output charge controller of the utility model comprises photovoltaic cell (PV) 1, BUCK/BOOST circuit 2, charging circuit 3, voltage detecting circuit 4, single-chip microcomputer (MCU) 5, drive circuit 6, storage battery 7.Wherein the input termination photovoltaic cell (PV) 1 of BUCK/BOOST circuit 2 is exported termination voltage detecting circuit 4 and charging circuit 3; The output termination storage battery 7 of charging circuit 3; The output of voltage detecting circuit 4 connects single-chip microcomputer (MCU) 5; The output termination drive circuit 6 and the charging circuit 3 of single-chip microcomputer (MCU) 5; The output of drive circuit 6 connects BUCK/BOOST circuit 2.
The BUCK/BOOST circuit is as shown in Figure 2, by switching tube Q, inductance L, diode D, capacitor C and load resistance R
LThe switching tube c utmost point meets PV+, and the b utmost point connects the output of drive circuit, and the e utmost point connects inductance and diode negative terminal, the positive termination capacitor negative terminal of diode, the positive termination PV-of the inductance other end and electric capacity, capacitor C two termination load resistance R
LThis module is used for the output voltage of solar panel is carried out DC-DC (DC-to-dc) conversion.The conducting turn-off time through control switch pipe Q changes storage, the release time of electric energy in inductance, thereby changes output voltage, and the voltage output that makes solar panel 12-24V can be stablized through conversion and exported 15V and charge a battery; Adjusting load characteristic simultaneously is operated on the maximum power point solar panel.
Single-chip microcomputer (MCU) 5 output PWM1 and two control impuls of PWM2, wherein PWM1 is used to control BUCK/BOOST circuit 2, and PWM2 is used to control charging circuit 3.The output voltage of 4 pairs of BUCK/BOOST circuit 2 of voltage detecting circuit is sampled and is delivered to single-chip microcomputer (MCU) 5 and compares, and comparative result is used to change the duty ratio of PWM1.Because the PWM ripple of single-chip microcomputer output is not enough to drive the switching tube Q in the BUCK/BOOST circuit 2, so PWM1 sends into drive circuit 6 and amplifies.
Claims (2)
1. the charge controller of photovoltaic maximum power output; It is characterized in that: comprise solar panel (PV), BUCK/BOOST (buck/boost chopper) circuit, charging circuit, voltage detecting circuit, single-chip microcomputer (MCU), drive circuit, storage battery; Wherein the input termination solar panel (PV) of BUCK/BOOST circuit is exported termination voltage detecting circuit and charging circuit; The output termination storage battery of charging circuit; The output of voltage detecting circuit connects single-chip microcomputer (MCU); The output termination drive circuit and the charging circuit of single-chip microcomputer (MCU); The output of drive circuit connects the BUCK/BOOST circuit.
2. photovoltaic maximum power output charge controller according to claim 1 is characterized in that: by switching tube Q, inductance L, diode D, capacitor C and load resistance R
LConstitute; The c utmost point of switching tube Q meets PV+, and the b utmost point connects the output of drive circuit, and the e utmost point connects inductance L and diode D negative terminal, the positive termination capacitor C of diode D negative terminal, the positive termination PV-of the inductance L other end and capacitor C, capacitor C two termination load resistance R
L
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200917099U CN202167865U (en) | 2011-03-31 | 2011-03-31 | Charging controller with photovoltaic maximum power output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200917099U CN202167865U (en) | 2011-03-31 | 2011-03-31 | Charging controller with photovoltaic maximum power output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202167865U true CN202167865U (en) | 2012-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200917099U Expired - Fee Related CN202167865U (en) | 2011-03-31 | 2011-03-31 | Charging controller with photovoltaic maximum power output |
Country Status (1)
| Country | Link |
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| CN (1) | CN202167865U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904302A (en) * | 2012-09-28 | 2013-01-30 | 上海理工大学 | High-efficiency solar charging device and charging method thereof |
| 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 |
| CN104638729A (en) * | 2015-02-10 | 2015-05-20 | 漳州科华技术有限责任公司 | Parallel connection type photovoltaic charger fault management system and method |
| CN107134818A (en) * | 2016-02-29 | 2017-09-05 | 西门子瑞士有限公司 | Notify device and method thereof |
-
2011
- 2011-03-31 CN CN2011200917099U patent/CN202167865U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904302A (en) * | 2012-09-28 | 2013-01-30 | 上海理工大学 | High-efficiency solar charging device and charging method thereof |
| 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 |
| CN104638729A (en) * | 2015-02-10 | 2015-05-20 | 漳州科华技术有限责任公司 | Parallel connection type photovoltaic charger fault management system and method |
| CN107134818A (en) * | 2016-02-29 | 2017-09-05 | 西门子瑞士有限公司 | Notify device and method thereof |
| CN107134818B (en) * | 2016-02-29 | 2020-04-07 | 西门子瑞士有限公司 | Notification apparatus and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20130331 |