CN101534023A - Solar charging/discharging system and charging/discharging method thereof - Google Patents
Solar charging/discharging system and charging/discharging method thereof Download PDFInfo
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- CN101534023A CN101534023A CN200810083800A CN200810083800A CN101534023A CN 101534023 A CN101534023 A CN 101534023A CN 200810083800 A CN200810083800 A CN 200810083800A CN 200810083800 A CN200810083800 A CN 200810083800A CN 101534023 A CN101534023 A CN 101534023A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a solar charging/discharging system and a charging/discharging method thereof. The solar charging/discharging system comprises a solar battery, a super-capacitor and a switch. The solar battery is used for collecting solar energy and converting the solar energy into the electric energy. The super-capacitor is coupled to the solar battery. The super-capacitor and the solar battery are coupled to a load by the switch. The super-capacitor is selectively charged/discharged according to a threshold voltage.
Description
Technical field
The present invention relates to a kind of solar charging (solar energy charging/dischargingsystem) and based on the charging/discharging method of a solar cell (solar cell).
Background technology
Solar cell because its will from a light source (for example, sunlight) transform light energy becomes electric energy, for example controlling, electronic installation such as calculator, computer or for the civil power use, so solar cell is widely used.
See also Fig. 1.Fig. 1 is the power-voltage characteristic curve chart of a solar cell under different degree of exposure.As shown in Figure 1, in the nature of things, the generated output of solar cell under high sunshine is height under low sunshine.In addition, the 1/Z among Fig. 1
LRepresentative is as the line of falling the impedance characteristic of the load of solar cell.This load can be current converter, storage device (for example, rechargeable battery) or civil power etc.
Be noted that the intersection point of the power-voltage characteristic curve of the line of falling the impedance characteristic of load and solar cell is promptly represented the operating voltage point of solar cell.As shown in Figure 1, under high sunshine, solar cell can operate under near input operating range point P1.Yet under low sunshine, solar cell can only operate under operating voltage point P2 on the low side, causes its generated output significantly to reduce.
In the prior art, (maximum power point tracking, MPPT) system is to adjust the operating voltage point of solar cell to have disclosed a kind of maximum power point tracking in the periodical of Solar Energy 81 (2007) 31-38.See also Fig. 2.Fig. 2 is the schematic diagram of this maximum power point tracking system.This maximum power point tracking system is by a DC-to-DC converter and the software of arranging in pairs or groups, and the output voltage V i and the electric current I i that detect solar cell are at any time also adjusted, and makes solar cell can remain on running under the maximum power point.Yet there is the shortcoming that manufacturing cost is higher and system is more numerous and diverse in this kind system.
According to statistics, a mean annual fine number had about 200 days.And in the middle of one day, solar cell can operate under input operating range point in 10 of mornings to 2 pm (being the high period at sunshine) haply.That is to say that existing solar cell is because of being subject to load, only having 800 hours in the middle of 1 year can operate under input operating range point.Therefore, making solar cell still can operate to promote its effective utilization real under input operating range point under low sunshine is instant subject under discussion.
Therefore, main purpose of the present invention provides a kind of solar charging and based on the charging/discharging method of a solar cell, to address the above problem.
Summary of the invention
The purpose of this invention is to provide a kind of solar charging (solar energycharging/discharging system) and based on the charging/discharging method of a solar cell (solar cell).
According to a preferred embodiment of the present invention, this solar charging comprises a solar cell (solar cell), an electrochemical capacitance (super-capacitor) and a switch.
This solar cell is in order to collect a solar energy and this solar energy converting is become an electric energy.This electrochemical capacitance is coupled to this solar cell.This electrochemical capacitance and this solar cell are coupled to a load by this switch.This electrochemical capacitance optionally is recharged/discharges according to a threshold value voltage.
Another preferred embodiment according to the present invention is a kind of charging/discharging method based on a solar cell (solar cell).This solar cell is in order to collect a solar energy and this solar energy converting is become an electric energy.One electrochemical capacitance is coupled to this solar cell.This electrochemical capacitance and this solar cell are coupled to a load by a switch.
This method at first detects a cross-pressure of this electrochemical capacitance.Then, relatively this cross-pressure and a threshold value voltage of this method.If this cross-pressure is lower than this threshold value voltage, this method is then opened this switch, causes this solar cell with this electric energy this electrochemical capacitance to be charged.
Another preferred embodiment according to the present invention is a kind of solar charging.This solar charging comprises a solar cell, one first electrochemical capacitance and one second electrochemical capacitance.
This solar cell is in order to collect a solar energy and this solar energy converting is become an electric energy.This first electrochemical capacitance is coupled to this solar cell and is coupled to a load by a second switch by one first switch.This solar cell is coupled to this load by this first switch and this second switch.This second electrochemical capacitance is coupled to this solar cell and is coupled to this load by one the 4th switch by one the 3rd switch.This solar cell is coupled to this load by the 3rd switch and the 4th switch.
Compared to prior art, solar charging according to the present invention provided electric energy to the lower electrochemical capacitance of a resistance value earlier under low sunshine.Because the impedance of electrochemical capacitance is very low, so solar cell still can operate under near input operating range point.Therefore, no matter solar charging according to the present invention is all operating under near input operating range point under high sunshine or low sunshine, to promote the effective utilization of solar cell.
Description of drawings
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing:
Fig. 1 is the power-voltage characteristic curve chart of a solar cell under different degree of exposure.
Fig. 2 is the schematic diagram of maximum power point tracking system.
Fig. 3 A is the solar charging of the preferred embodiment one of according to the present invention.
Fig. 3 B is the solar charging by another preferred embodiment of Fig. 3 A extension.
Fig. 4 is the power-voltage characteristic curve chart of solar charging according to the present invention under different degree of exposure.
The measurement of the power-time relationship when Fig. 5 provides electric power to load respectively according to solar recharging system of the present invention and single solar cell.
Fig. 6 is the flow chart according to a kind of charging/discharging method based on a solar cell of another preferred embodiment of the present invention.
Fig. 7 A is the solar charging according to another preferred embodiment of the present invention.
Fig. 7 B is the solar charging by another preferred embodiment of Fig. 7 A extension.
Embodiment
See also Fig. 3 A.Fig. 3 A is a solar charging 1 according to a preferred embodiment of the present invention.
As shown in Figure 3A, this solar charging 1 comprises a solar cell 10, an electrochemical capacitance 12 and a switch 14.
This solar cell 10 is in order to collect a solar energy and this solar energy converting is become an electric energy.This electrochemical capacitance 12 is coupled to this solar cell 10.This electrochemical capacitance 12 and this solar cell 10 are coupled to a load 16 by this switch 14.This electrochemical capacitance 12 optionally is recharged/discharges according to a threshold value voltage.
In actual applications, this load 16 can be a current converter (for example, DC-to-DC transducer or DC-to-AC transducer), an energy storage device (for example, rechargeable battery) or civil power, but not as limit.
See also Fig. 3 B.Fig. 3 B is the solar charging 1 by another preferred embodiment of Fig. 3 A extension.Shown in Fig. 3 B, this solar charging 1 further comprises a voltage check device 18 (voltage-detecting device), and this voltage check device 18 is in order to detect a cross-pressure of this electrochemical capacitance 12.
When this cross-pressure of this electrochemical capacitance 12 was lower than this threshold value voltage, this switch 14 was unlocked and causes this solar cell 10 with this electric energy this electrochemical capacitance 12 to be charged.When this electrochemical capacitance 12 filled full after, this switch 14 is closed and causes this solar cell 10 and this electrochemical capacitance 12 to provide electrical power to this load 16, when this cross-pressure of this electrochemical capacitance 12 is lower than this threshold value voltage, this switch 14 is unlocked once again, causes this solar cell 10 once again this electrochemical capacitance 12 to be charged with this electric energy.
See also Fig. 4, Fig. 4 is the power-voltage characteristic curve chart of solar charging 1 according to the present invention under different degree of exposure.
As shown in Figure 4, the 1/Z among Fig. 4
SCRepresent the line of falling the impedance characteristic of this electrochemical capacitance 12,1/Z
LRepresent the line of falling the impedance characteristic of load 16.Because this electrochemical capacitance 12 is higher at the resistance value of low frequency, even under low sunshine, solar cell 10 still can operate under near input operating range point P3, and electric energy is stored to earlier in this electrochemical capacitance 12, for follow-up utilization.In comparison, if solar cell 10 directly supplies power to load 16 under low sunshine, solar cell 10 can only operate under operating voltage point P2 on the low side, causes its generated output significantly to reduce.
See also Fig. 5.The measurement of the power-time relationship when Fig. 5 provides electric power to load respectively according to solar recharging system of the present invention and single solar cell.As shown in Figure 5, single solar cell is about 0.056W (being the horizontal line of Fig. 5 below) to the average power of electric.In comparison, solar recharging system according to the present invention maximum power to electric in one-period can arrive 0.532W, and average power also reaches 0.145W, than big many of the average power 0.056W of single solar cell.Therefore, has higher power supplying efficiency really according to solar recharging system of the present invention.
See also Fig. 6 and cooperate and consult Fig. 3 A.Fig. 6 is the flow chart according to a kind of charging/discharging method based on a solar cell 10 of another preferred embodiment of the present invention.
This solar cell 10 is in order to collect a solar energy and this solar energy converting is become an electric energy.One electrochemical capacitance 12 is coupled to this solar cell 10.This electrochemical capacitance 12 and this solar cell 10 are coupled to a load 16 by a switch 14.
This method is execution in step S100 at first, to detect a cross-pressure of this electrochemical capacitance 12.
Then, whether this method execution in step S102 is lower than a threshold value voltage with this cross-pressure relatively.
If this cross-pressure is lower than this threshold value voltage, this method execution in step S104 causes this solar cell 10 with this electric energy this electrochemical capacitance 12 to be charged to open this switch 14.
When this electrochemical capacitance 12 filled full after, that is this cross-pressure system of this electrochemical capacitance 12 is higher than this threshold value voltage, this method execution in step S106 causes this solar cell 10 and this electrochemical capacitance 12 to provide electrical power to this load 16 to close this switch 14.
If when this electrochemical capacitance 12 made that because of discharge this cross-pressure is lower than this threshold value voltage, this method was then opened this switch 14 once again, cause this solar cell 10 once again this electrochemical capacitance 12 to be charged with this electric energy.
See also Fig. 7 A.Fig. 7 A is the solar charging 2 according to another preferred embodiment of the present invention.
Shown in Fig. 7 A, this solar charging 2 comprises a solar cell 20, one first electrochemical capacitance 22 and one second electrochemical capacitance 30.
This solar cell 20 is in order to collect a solar energy and this solar energy converting is become an electric energy.This first electrochemical capacitance 22 is coupled to this solar cell 20 and is coupled to a load 28 by a second switch 26 by one first switch 24.This solar cell 20 is coupled to this load 28 by this first switch 24 and this second switch 26.This second electrochemical capacitance 30 is coupled to this solar cell 20 and is coupled to this load 28 by one the 4th switch 34 by one the 3rd switch 32.This solar cell 20 is coupled to this load 28 by the 3rd switch 32 and the 4th switch 34.
This first electrochemical capacitance 22 optionally is recharged/discharges according to one first threshold value voltage, and this second electrochemical capacitance 30 optionally is recharged/discharges according to one second threshold value voltage.
See also Fig. 7 B.Fig. 7 B is the solar charging 2 by another preferred embodiment of Fig. 7 A extension.Shown in Fig. 7 B, this solar charging 2 further comprises one first voltage check device 36 and one second voltage check device 38, respectively in order to one first cross-pressure that detects this first electrochemical capacitance 22 and one second cross-pressure of this second electrochemical capacitance 30.
When this first cross-pressure of this first electrochemical capacitance 22 was lower than this first threshold value voltage, this first switch 24 was closed and this second switch 26 is unlocked, and caused this solar cell 20 with this electric energy this first electrochemical capacitance 22 to be charged.
When this first electrochemical capacitance 22 filled full after, this first switch 24 is unlocked and this second switch 26 is closed, and causes this first electrochemical capacitance 22 to provide electrical power to this load 28.When this first cross-pressure of this first electrochemical capacitance 22 was lower than this first threshold value voltage, this first switch 24 was closed once again and this second switch 26 is unlocked once again.
When this second cross-pressure of this second electrochemical capacitance 30 was lower than this second threshold value voltage, the 3rd switch 32 was closed and the 4th switch 34 is unlocked, and caused this solar cell 20 with this electric energy this second electrochemical capacitance 30 to be charged.
When this second electrochemical capacitance 30 filled full after, the 3rd switch 32 is unlocked and the 4th switch 34 is closed, and causes this second electrochemical capacitance 30 to provide electrical power to this load 28.When this second cross-pressure of this second electrochemical capacitance 30 was lower than this second threshold value voltage, the 3rd switch 32 was closed once again and the 4th switch 34 is unlocked once again.
Compared to prior art, solar charging according to the present invention provided electric energy to the lower electrochemical capacitance of a resistance value earlier under low sunshine.Because the impedance of electrochemical capacitance is very low, so solar cell still can operate under near input operating range point.Therefore, no matter solar charging according to the present invention is all operating under near input operating range point under high sunshine or low sunshine, to promote the effective utilization of solar cell.
Below preferred embodiment of the present invention is specified, but the present invention is not limited to described embodiment, those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of spirit of the present invention, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (20)
1, a kind of solar charging is characterized in that, described solar charging comprises:
One solar cell, described solar cell is in order to collect a solar energy and described solar energy converting is become an electric energy;
One electrochemical capacitance, described electrochemical capacitance is coupled to described solar cell; And
One switch, described electrochemical capacitance and described solar cell are coupled to a load by described switch, and wherein said electrochemical capacitance optionally is recharged/discharges according to a threshold value voltage.
2, solar charging as claimed in claim 1 is characterized in that: further comprise a voltage check device, described voltage check device is in order to detect a cross-pressure of described electrochemical capacitance.
3, solar charging as claimed in claim 2 is characterized in that: when the described cross-pressure of described electrochemical capacitance was lower than described threshold value voltage, described switch was unlocked and causes described solar cell with described electric energy described electrochemical capacitance to be charged.
4, solar charging as claimed in claim 3, it is characterized in that: when described electrochemical capacitance filled full after, described switch is closed and causes described solar cell and described electrochemical capacitance to provide electrical power to described load, when the described cross-pressure of described electrochemical capacitance was lower than described threshold value voltage, described switch was unlocked once again.
5, solar charging as claimed in claim 1 is characterized in that: described load is a current converter.
6, solar charging as claimed in claim 1 is characterized in that: described load is an energy storage device.
7, a kind of charging/discharging method based on a solar cell, it is characterized in that: described solar cell is in order to collect a solar energy and described solar energy converting is become an electric energy, one electrochemical capacitance is coupled to described solar cell, described electrochemical capacitance and described solar cell are coupled to a load by a switch, and described method comprises the following step:
Detect a cross-pressure of described electrochemical capacitance;
More described cross-pressure and a threshold value voltage; And
If described cross-pressure is lower than described threshold value voltage, then open described switch, cause described solar cell described electrochemical capacitance to be charged with described electric energy.
8, method as claimed in claim 7 is characterized in that: further comprise the following step:
When described electrochemical capacitance filled full after, then close described switch, cause described solar cell and described electrochemical capacitance to provide electrical power to described load.
9, method as claimed in claim 8 is characterized in that: further comprise the following step:
When the described cross-pressure of described electrochemical capacitance is lower than described threshold value voltage, then open described switch once again.
10, method as claimed in claim 7 is characterized in that: described load is a current converter.
11, method as claimed in claim 7 is characterized in that: described load is an energy storage device.
12, a kind of solar charging is characterized in that, described solar charging comprises:
One solar cell, described solar cell is in order to collect a solar energy and described solar energy converting is become an electric energy;
One first electrochemical capacitance, described first electrochemical capacitance is coupled to described solar cell and is coupled to a load by a second switch by one first switch, and described solar cell is coupled to described load by described first switch and described second switch; And
One second electrochemical capacitance, described second electrochemical capacitance is coupled to described solar cell and is coupled to described load by one the 4th switch by one the 3rd switch, and described solar cell is coupled to described load by described the 3rd switch and described the 4th switch.
13, solar charging as claimed in claim 12, it is characterized in that: described first electrochemical capacitance optionally is recharged/discharges according to one first threshold value voltage, and described second electrochemical capacitance optionally is recharged/discharges according to one second threshold value voltage.
14, solar charging as claimed in claim 13, it is characterized in that: further comprise one first voltage check device and one second voltage check device, respectively in order to one first cross-pressure that detects described first electrochemical capacitance and one second cross-pressure of described second electrochemical capacitance.
15, solar charging as claimed in claim 14, it is characterized in that: when described first cross-pressure of described first electrochemical capacitance is lower than the described first threshold value voltage, described first switch is closed and described second switch is unlocked, and causes described solar cell with described electric energy described first electrochemical capacitance to be charged.
16, solar charging as claimed in claim 15, it is characterized in that: when described first electrochemical capacitance filled full after, described first switch is unlocked and described second switch is closed, cause described first electrochemical capacitance to provide electrical power to described load, when described first cross-pressure of described first electrochemical capacitance was lower than the described first threshold value voltage, described first switch was closed and described second switch is unlocked.
17, solar charging as claimed in claim 16, it is characterized in that: when described second cross-pressure of described second electrochemical capacitance is lower than the described second threshold value voltage, described the 3rd switch is closed and described the 4th switch is unlocked, and causes described solar cell with described electric energy described second electrochemical capacitance to be charged.
18, solar charging as claimed in claim 17, it is characterized in that: when described second electrochemical capacitance filled full after, described the 3rd switch is unlocked and described the 4th switch is closed, cause described second electrochemical capacitance to provide electrical power to described load, when described second cross-pressure of described second electrochemical capacitance was lower than the described second threshold value voltage, described the 3rd switch was closed and described the 4th switch is unlocked.
19, solar charging as claimed in claim 12 is characterized in that: described load is a current converter.
20, solar charging as claimed in claim 12 is characterized in that: described load is an energy storage device.
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| CN2008100838009A CN101534023B (en) | 2008-03-11 | 2008-03-11 | Solar charging/discharging system and charging/discharging method thereof |
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| CN2008100838009A CN101534023B (en) | 2008-03-11 | 2008-03-11 | Solar charging/discharging system and charging/discharging method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580290A (en) * | 2013-10-24 | 2014-02-12 | 深圳市迈安杰科技有限公司 | Weak energy collecting and control circuit |
| CN104836513A (en) * | 2015-04-17 | 2015-08-12 | 宁波高新区聚光太阳能有限公司 | Solar battery intermittent output method |
| CN106940750A (en) * | 2017-03-27 | 2017-07-11 | 深圳市科漫达智能管理科技有限公司 | A kind of localization method and device of utilization solar energy |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022225A (en) * | 2006-02-15 | 2007-08-22 | 黄允成 | Solar cell system and charging method thereof |
| CN201041953Y (en) * | 2007-04-12 | 2008-03-26 | 东莞市特龙金科能源科技有限公司 | A solar power supply conversion circuit |
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2008
- 2008-03-11 CN CN2008100838009A patent/CN101534023B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580290A (en) * | 2013-10-24 | 2014-02-12 | 深圳市迈安杰科技有限公司 | Weak energy collecting and control circuit |
| CN103580290B (en) * | 2013-10-24 | 2015-08-05 | 深圳市迈安杰科技有限公司 | Micro-energy acquisition control circuit |
| CN104836513A (en) * | 2015-04-17 | 2015-08-12 | 宁波高新区聚光太阳能有限公司 | Solar battery intermittent output method |
| CN106940750A (en) * | 2017-03-27 | 2017-07-11 | 深圳市科漫达智能管理科技有限公司 | A kind of localization method and device of utilization solar energy |
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| CN101534023B (en) | 2012-03-21 |
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