CN2919127Y - Solar battery maximal power dot tracking apparatus - Google Patents
Solar battery maximal power dot tracking apparatus Download PDFInfo
- Publication number
- CN2919127Y CN2919127Y CNU2006200414239U CN200620041423U CN2919127Y CN 2919127 Y CN2919127 Y CN 2919127Y CN U2006200414239 U CNU2006200414239 U CN U2006200414239U CN 200620041423 U CN200620041423 U CN 200620041423U CN 2919127 Y CN2919127 Y CN 2919127Y
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- solar cell
- perturbation
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- power point
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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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The utility model discloses a solar energy cell maximum power point tracing device consisting of a solar energy cell, an adjustment circuit and a storage cell connected in series, as well as a control circuit. The control circuit includes a voltage sample unit, a current sample unit, a computation unit, a comparison unit and a perturbation unit. The outputs of the storage cell respectively connect with the voltage sample unit and current sample unit; the outputs of the voltage sample unit and current sample unit connect with the input of the computation unit; the computation unit, the comparison unit and the perturbation unit is connected in sequence. The output of the perturbation unit is connected with the input of the adjustment unit. By sampling the charge voltage and current, the device can get the solar energy cell maximum power point under the current status, then the device controls the charging load by adjusting the width of the pulse signal, so that the charging load will match the parameters of the solar energy cell, so that the solar energy cell can work at the maximum power point.
Description
Technical field
The utility model belongs to field of solar thermal power generation, specifically one in the process that solar cell charges a battery, by control with regulate, make solar cell be always operating at solar cell maximum power point tracking device on the maximum power point.
Background technology
When solar cell charges a battery, all be the mode of utilizing constant-voltage charge basically at present.And the power loss that this mode is brought, developing rapidly with the rapid reduction of electronic device price and seem more and more uneconomical along with recent microelectric technique.And because solar cell holds at high price, energy conversion efficiency is difficult to the present situation that improves, for solar cell the efficient utilization of charge in batteries is seemed even more important.
Summary of the invention
The purpose of this utility model is to provide the device of a kind of solar cell to charge in batteries, and it can make solar cell to charge in batteries the time, always works on its maximum power point, has utilized the generating efficiency of solar cell fully as far as possible.
The technical measures that the utility model is taked are: the solar cell maximum power point tracking device is characterized in comprising: solar cell, regulating circuit, battery, control circuit; Described solar cell, regulating circuit, battery are linked in sequence; Described control circuit comprises voltage sample unit, current sampling unit, computing unit, comparing unit and perturbation unit; The output of described battery is connected with the input of voltage sample unit and current sampling unit respectively; The output of voltage sample unit and current sampling unit is connected with the input of computing unit respectively; The output of computing unit is connected with the input of comparing unit; The output of comparing unit is connected with the input of perturbation unit; The output of perturbation unit is connected with the input of regulon.
Above-mentioned solar cell maximum power point tracking device, wherein, described control circuit is made of a single-chip microcomputer.
Above-mentioned solar cell maximum power point tracking device, wherein, described regulating circuit comprises a charging capacitor, an energy storage inductor, a FET and a diode; Described charging capacitor two ends connect solar cell, the positive pole of solar cell connects an end of energy storage inductor, the other end of this inductance connects the positive pole of diode and the source electrode of FET, be connected battery between the drain electrode of FET and the diode, the grid of FET is connected with the output of the perturbation unit of control circuit.
Above-mentioned solar cell maximum power point tracking device, wherein, the control signal of the perturbation unit output of the control circuit that the grid of FET connects in the described regulating circuit is a pulse width modulating signal, variation along with pulse width, the time scale that changes the FET conducting and end is to regulate charging current and the voltage of solar cell to battery
Above-mentioned solar cell maximum power point tracking device, wherein: the diode in the described regulating circuit is made of the Schottky diode with unidirectional conducting function.
Because the utility model has been taked above technical scheme, the electric current and voltage of charging or the like parameter is sampled, by calculating and relatively obtain solar cell maximum power point under prevailing circumstances.Change the charging load of solar cell then by the width of regulating the pulse signal that drives charging circuit, make the instant parameter of charging load and solar cell be complementary, thereby solar cell can be operated on the maximum charge power point all the time.
Description of drawings
Feature of the present utility model, performance are described in detail by following embodiment and accompanying drawing thereof.
Fig. 1 is the electrical block diagram of the utility model solar cell maximum power point tracking device.
Fig. 2 is the electrical schematic diagram of the utility model solar cell maximum power point tracking device.
Fig. 3 is the workflow diagram of the utility model solar cell maximum power point tracking device.
The specific embodiment
See also Fig. 1, this is the electrical block diagram of the utility model solar cell maximum power point tracking device.The utility model solar cell maximum power point tracking device comprises: solar cell 1, regulating circuit 2, battery 3, control circuit 4.Solar cell 1, regulating circuit 2, battery 3 are linked in sequence.Control circuit 4 comprises voltage sample unit 41, current sampling unit 42, computing unit 43, comparing unit 44 and perturbation unit 45.The output of battery is connected with the input of voltage sample unit and current sampling unit respectively; The output of voltage sample unit and current sampling unit is connected with the input of computing unit respectively; The output of computing unit is connected with the input of comparing unit; The output of comparing unit is connected with the input of perturbation unit; The output of perturbation unit is connected with the input of regulon.
Behind the solar cell power generation, by regulating circuit to charge in batteries.Control circuit after the data processing, searches out maximum charge power points at that time according to the sampling of the voltage and current in the charging circuit, then regulating circuit is regulated, and device is worked under maximum charge power.
See also Fig. 2.The control circuit 4 of the utility model solar cell maximum power point tracking device is made of a single-chip microcomputer U.
Regulating circuit 2 comprises a charging capacitor C, an energy storage inductor L, a FET Q and a diode D; The corresponding respectively both positive and negative polarity that connects solar cell in the positive and negative two ends of capacitor C, the positive pole of solar cell connects the end of energy storage inductor L, the other end of this inductance connects the positive pole of diode D and the source electrode of FET Q, be connected battery between the drain electrode of FET and the diode, the grid of FET is connected with the output of the perturbation unit of control circuit.Diode is made of the Schottky diode with unidirectional conducting function.The control signal of the perturbation unit output of the control circuit that the grid of FET connects in this regulating circuit is a pulse width modulating signal, variation along with pulse width, the time scale that changes the FET conducting and end is to regulate charging current and the voltage of solar cell to battery.
The principle of the utility model solar cell MPPT maximum power point tracking is: the electricity that solar cell sends is regulated the back to charge in batteries by regulating circuit.The voltage and current of charge in batteries feeds back to voltage sample and current sample.Result after two groups of samplings delivers to computing unit, calculates at that time charge power by computing unit.Result calculated is delivered to comparing unit, and comparing unit compared charge power and the charge power of a last time that calculates.Comparative result is delivered to the perturbation unit.If charge power keeps perturbation constant becoming big so; If charge power is diminishing, change the perturbation direction so, allow perturbation unit controls regulating circuit to regulating in the other direction.
Like this, regulating circuit can be adjusted in maximum rating to charge power all the time, guaranteed solar cell always with peak power to charge in batteries.
The utility model can ceaselessly be taken a sample to instant rechargeable solar battery parameter, calculates at that time solar cell to the charge power of battery.Change the parameter of charging then a little, calculate the charge power that changes the solar cell behind the charge parameter again.Both can determine to keep this after relatively automatically and change still that rightabout changes charge parameter.Up to when any direction changes charge parameter, it is big that the charge power of solar cell all can become.Pairing parameters is exactly the maximum power point of solar cell to charge in batteries so at this moment.
The process of whole searching solar cell maximum power point is all finished by the software control circuit that is embedded in the single-chip microcomputer.Sampled data input single-chip microcomputer calculates and compares, and is changed the parameter of rechargeable solar battery again by the single-chip microcomputer output signal.Up to finding maximum power point.Because in the middle of external environment is changing always, therefore sample, calculate, compare, change parameter, the process need that is whole searching solar maximum power point ceaselessly carries out a moment, so just can make solar cell all the time with at that time peak power to charge in batteries.
Because the response speed that the speed of service of single-chip microcomputer changes faster than solar cell back affected by environment parameter far away so single-chip microcomputer has time enough to find the maximum power point of solar cell, is always operating on each maximum power point constantly it.
The utility model can also be regulated the load size that is added on the solar cell.By changing this load, correspondingly changed the output voltage and the output current of solar cell, also promptly changed the power output of solar cell.The signal of the change load that provides according to single-chip microcomputer, this circuit can change the charge power of solar cell automatically to maximum.When surrounding environment changes, the maximum charge power points of solar cell also changes, this circuit can pass to single-chip microcomputer with parameter at this moment rapidly, and according to the signal of single-chip microcomputer, with the output voltage and the output current of the solar cell of speed change full out, up to reaching maximum charge power.
When charging current was excessive, in order to protect battery, device can automatically switch to constant current charging mode.
When charging voltage was too high, in order to protect battery, device can automatically switch to the constant-voltage charge pattern.
By the automatic switchover of peak power charging, constant-current charge, three kinds of patterns of constant-voltage charge, make whole charging device under the situation of guaranteeing battery and solar cell safety, to remain at the work down of maximum charge power state.
See also Fig. 3.The workflow of the utility model solar cell MPPT maximum power point tracking comprises:
Step 1: read the electric current and voltage sampled signal
Step 2: the electric current and voltage value is multiplied each other, calculate the charge power of this moment.The perturbation direction just just is decided to be.
Step 3: charging current is carried out perturbation.Direction is for just just increasing, and direction just reduces for negative.
Step 4: read the later electric current and voltage sampled signal of perturbation
Step 5: calculate the later charge power of perturbation just.
Step 6: compare before the perturbation and the charge power after the perturbation.If the charge power of the charge power after the perturbation before greater than perturbation returns step 3 so.Otherwise, then continue to carry out downwards.
Step 7: the perturbation cancellation with step 3 is done, recover the preceding state of perturbation.
Step 8: change the perturbation direction.Originally for just, just changed into negative.Originally be negative, just just changed into.Return step 3 then, constantly repeating step 3 is to the work of step 8.
Repeat such step, can search out each maximum charge power constantly all the time.
Claims (5)
1, solar cell maximum power point tracking device is characterized in that: comprising: solar cell, regulating circuit, battery, control circuit; Described solar cell, regulating circuit, battery are linked in sequence; Described control circuit comprises voltage sample unit, current sampling unit, computing unit, comparing unit and perturbation unit; The output of described battery is connected with the input of voltage sample unit and current sampling unit respectively; The output of voltage sample unit and current sampling unit is connected with the input of computing unit respectively; The output of computing unit is connected with the input of comparing unit; The output of comparing unit is connected with the input of perturbation unit; The output of perturbation unit is connected with the input of regulon.
2, solar cell maximum power point tracking device according to claim 1, it is characterized in that: described control circuit is made of a single-chip microcomputer.
3, solar cell maximum power point tracking device according to claim 1 is characterized in that: described regulating circuit comprises a charging capacitor, an energy storage inductor, a FET and a diode; Described charging capacitor two ends connect solar cell, the positive pole of solar cell connects an end of energy storage inductor, the other end of this inductance connects the positive pole of diode and the source electrode of FET, be connected battery between the drain electrode of FET and the diode, the grid of FET is connected with the output of the perturbation unit of control circuit.
4, solar cell maximum power point tracking device according to claim 3, it is characterized in that: the control signal of the perturbation unit output of the control circuit that the grid of FET connects in the described regulating circuit is a pulse width modulating signal, variation along with pulse width, the time scale that changes the FET conducting and end is to regulate charging current and the voltage of solar cell to battery.
5, solar cell maximum power point tracking device according to claim 1, it is characterized in that: the diode in the described regulating circuit is made of the Schottky diode with unidirectional conducting function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200414239U CN2919127Y (en) | 2006-04-28 | 2006-04-28 | Solar battery maximal power dot tracking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200414239U CN2919127Y (en) | 2006-04-28 | 2006-04-28 | Solar battery maximal power dot tracking apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN2919127Y true CN2919127Y (en) | 2007-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200414239U Expired - Lifetime CN2919127Y (en) | 2006-04-28 | 2006-04-28 | Solar battery maximal power dot tracking apparatus |
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| CN (1) | CN2919127Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713783A (en) * | 2010-01-18 | 2012-10-03 | Ls产电株式会社 | Maximum power point tracking method |
| CN102944828A (en) * | 2012-11-26 | 2013-02-27 | 河海大学常州校区 | Intelligent solar cell module outdoor testing platform and testing method thereof |
-
2006
- 2006-04-28 CN CNU2006200414239U patent/CN2919127Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713783A (en) * | 2010-01-18 | 2012-10-03 | Ls产电株式会社 | Maximum power point tracking method |
| CN102713783B (en) * | 2010-01-18 | 2014-07-16 | Ls产电株式会社 | Maximum power point tracking method |
| CN102944828A (en) * | 2012-11-26 | 2013-02-27 | 河海大学常州校区 | Intelligent solar cell module outdoor testing platform and testing method thereof |
| CN102944828B (en) * | 2012-11-26 | 2015-02-18 | 河海大学常州校区 | Intelligent solar cell module outdoor testing platform and testing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI LIANYUAN NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHANGHAI SENCHANG ELECTRIC TECHNOLOGY CO., LTD. Effective date: 20130815 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201400 FENGXIAN, SHANGHAI TO: 214174 WUXI, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130815 Address after: Huishan District of Jiangsu city in Wuxi Province, Wen Hui Lu 214174 room 1405 No. 18-1 Patentee after: Wuxi United source of New Energy Technology Co., Ltd. Address before: 201400, Shanghai Fengxian District South Town Wang Yang Development Zone Patentee before: Shanghai Senchang Electric Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070704 |
|
| EXPY | Termination of patent right or utility model |