CN101257136B - Photovoltaic battery-small battery charging method - Google Patents
Photovoltaic battery-small battery charging method Download PDFInfo
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- CN101257136B CN101257136B CN2007100795545A CN200710079554A CN101257136B CN 101257136 B CN101257136 B CN 101257136B CN 2007100795545 A CN2007100795545 A CN 2007100795545A CN 200710079554 A CN200710079554 A CN 200710079554A CN 101257136 B CN101257136 B CN 101257136B
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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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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a charging method of photovoltaic cell - small cell which belongs to cell application technology field. The charging method includes: a controller detects small cell voltage in small cell group, when all small cell voltage are higher than full charge voltage, system enters into full charge state, the controller selects N-1 amount small cells in series for discharging, photovoltaic cell discharges indirectly; when the controller detects small cell voltage lower than full charge voltage, system enters into charging state, small cell with lowest voltage is selected as charging object of photovoltaic cell, other N-1 amount small cells discharge in series. Thereby, energy can be obtained from photovoltaic cell in various light intensity environment for example, strong light intensity, normal light intensity, weak light intensity, and charges to accumulator.
Description
Technical field
The invention belongs to the battery technology field, particularly photovoltaic battery-small battery charging method.
Background technology
Since people such as Pearson in 1954 have successfully prepared first silicon solar cell, solar cell is as a kind of new forms of energy, its special advantages has far surpassed resources such as wind energy, water energy, geothermal energy, nuclear energy, be expected to become the main pillar of following supply of electric power, and will be used widely in all trades and professions.Portable equipment also is one of them very important application, and for example China cellphone subscriber is nearly 400,000,000 to the end of the year 2005, if the most of solar cells (claiming photovoltaic cell again) that adopt of these mobile phones will have considerable economic or social effect.
The institutional framework forms of a plurality of electric cores series connection of the many employings of the solar cell (claiming photovoltaic cell again) that uses now.The electricity generating principle of solar cell is by illumination, and solar-electricity core (pn knot) reacts, and produces electric current.If n solar-electricity core arranged, each solar-electricity core open circuit voltage is Vs, and short circuit current is Is, and as can be known, during these solar-electricity core series connection, open circuit voltage is nVs, and short circuit current then is Is.
Existing photovoltaic cell application technology is many to store with the electric weight of storage battery with the generation of photovoltaic cell.Because the charging voltage of selected storage battery can only be applied under the high light, because photovoltaic cell can only can satisfy under high light than higher.Thereby limited the development of photovoltaic technology in some field.
Summary of the invention
The objective of the invention is under different light intensity environment such as high light, general light intensity, the low light level, can both from photovoltaic cell, obtain energy, storage battery is charged.The inventive method is when the voltage of each baby battery that constitutes storage battery all is in the Full Charge Capacity state, select N-1 externally discharge of baby battery series connection, and photovoltaic cell is externally discharge directly, and when having detected baby battery voltage and be lower than Full Charge Capacity voltage, system enters charged state, selecting the minimum baby battery of voltage is the charging object of photovoltaic cell, remaining N-1 externally discharge of baby battery series connection.Like this, the object that at every turn charges has only a baby battery, and its required charging voltage is low, and no matter the photovoltaic cell under high light, general light intensity, the low light level can both satisfy its charging requirement.
The invention provides a kind of photovoltaic battery-small battery charging method, it is characterized in that, may further comprise the steps:
1) controller detects the voltage at each battery two ends of portable equipment baby battery group, according to predefined battery Full Charge Capacity threshold value, determines whether each battery needs charging and discharge battery;
2) when all baby batteries of baby battery group all are higher than predefined battery Full Charge Capacity threshold value, do not need charging, select N-1 externally discharge of baby battery series connection this moment, photovoltaic cell directly externally discharges;
3) when the baby battery group has baby battery voltage to be lower than predefined battery Full Charge Capacity threshold value, selecting a minimum baby battery of voltage is photovoltaic cell charging object, and all the other N-1 baby battery coupled in series are externally discharged;
4) through anti-adverse current diode, be communicated with that baby battery that need charge by opening and closing different switch combinations, and the battery of discharge;
5) when detecting that baby battery voltage that is recharged and reach predefined battery Full Charge Capacity threshold value, charging finishes.
Above-mentioned photovoltaic battery-small battery charging method is characterized in that, described photovoltaic cell is composed in series by M 〉=2 a group photovoltaic electricity core;
Above-mentioned photovoltaic battery-small battery charging method is characterized in that, described baby battery group is made up of N 〉=4 a group baby battery group;
Above-mentioned photovoltaic battery-small battery charging method is characterized in that, described anti-adverse current diode is to prevent the photovoltaic cell output voltage instability that causes when intensity of illumination is unstable, prevents that the photovoltaic cell group from producing adverse current when batteries charging.
Above-mentioned photovoltaic battery-small battery charging method is characterized in that, described baby battery notion is that open circuit voltage is lower with respect to other storage battery when its Full Charge Capacity, and the open circuit voltage of photovoltaic cell under low light environment can directly charge to baby battery.
Above-mentioned photovoltaic battery-small battery charging method is characterized in that, it is the charging object of photovoltaic cell that described controller can be selected arbitrary baby battery, and photovoltaic cell charges to it; Select remaining N-1 externally discharge of baby battery series connection.
Characteristics of the present invention:
Battery-the small battery charging method that The present invention be directed to multiple photoenvironment charging requirement and propose, this method is according to the characteristic of photovoltaic cell open circuit voltage when the different light, choose the carrier of baby battery, photovoltaic cell can be realized baby battery is charged under multiple photoenvironment for the savings electric weight.
Description of drawings
Fig. 1 is a portable set photovoltaic battery-small battery power source method schematic diagram of the present invention.
Fig. 2 is portable set photovoltaic battery-small battery power supply one a routine schematic diagram of the present invention.
Schematic diagram when Fig. 3 is the routine Full Charge Capacity state of portable set photovoltaic battery-small battery power supply of the present invention.
Schematic diagram when Fig. 4 is the routine charged state of portable set photovoltaic battery-small battery power supply of the present invention.
Fig. 5 is portable set photovoltaic battery-small battery power supply one a routine flow chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail.
Present embodiment is a portable set photovoltaic battery-small battery power supply.Below be the explanation of each parts:
Present embodiment is made up of controller, photovoltaic cell, baby battery group, potentiometer, switch and the protective circuit etc. that are used for electric power storage, as illustrated in fig. 1 and 2.Wherein,
Controller, microprocessor by low-power consumption band multi-channel analog digital quantizer (ADC) is formed, adopted the PIC18L series monolithic in the present embodiment, its input signal is baby battery group voltage signal VM1, VM2, VM3 and VM4, and its output signal is switching signal DK-1 ~ DK-2, DK+1 ~ DK+2, CK+1 ~ CK+4 and CK-1 ~ CK-4.
Switches set has adopted low-power consumption COMS switch in the present embodiment, as shown in Figure 2, control its on off operating mode by the switching signal that controller produces.
Photovoltaic cell is formed SB as shown in Figure 1 by M=12 photovoltaic electricity core coupled in series in the present embodiment.
Potentiometer is used for the voltage detector that system detects the output voltage of baby battery Battery pack, as VM1, VM2, VM3, the VM4 of Fig. 2.
Protective circuit has adopted common Xiao Jite diode D1 in the present embodiment.Unilateral conduction according to diode, produce the electric current adverse current when being used to prevent to charge, in reality is used, luminous environment might alter a great deal, unstable situation can appear in photronic output voltage, so diode is used for can preventing that the photoelectricity group from flowing to the electric current generation adverse current of baby battery group under unsettled situation.
The baby battery group is that the Ni-MH battery of 1.51V is formed during by N=4 Full Charge Capacity, as shown in Figure 2 NB1, NB2, NB3, NB4.When wherein three Ni-MH batteries connect with series system, the supply voltage of 4.53V can be provided, satisfy the requirement of portable equipment to supply voltage.
In use, when the voltage of each baby battery that constitutes storage battery all is in the Full Charge Capacity state, select N-1 externally discharge of baby battery series connection, and photovoltaic cell is externally discharge directly, and when having detected baby battery voltage and be lower than Full Charge Capacity voltage, system enters charged state, and to select the minimum baby battery of voltage be the charging object of photovoltaic cell, and remaining N-1 baby battery series connection externally discharged.Like this, the object that at every turn charges has only a baby battery, and its required charging voltage is low, and no matter the photovoltaic cell under high light, general light intensity, the low light level can both satisfy its charging requirement.
Under high light, choosing high light in the present embodiment is more than or equal to 1 light intensity intensity of illumination (1 light intensity is 100000LUX), and single photovoltaic electricity core open circuit voltage is 0.5 volt, and as mentioned above, the photovoltaic cell that this example adopts is that 12 photovoltaics electricity cores are composed in series.Therefore, under high light, the photovoltaic cell open circuit voltage can reach 6.0 volts, and this moment, the charging current of a baby battery was near the short circuit current under this light intensity of photovoltaic cell to single Ni-MH battery charging.
Under the general luminous intensity, choose general luminous intensity in the present embodiment for being greater than or equal to 0.5 light intensity intensity of illumination but be lower than 1 intensity of illumination, single photovoltaic electricity core open circuit electricity is greater than or equal to 0.25 volt, then the photovoltaic cell open circuit voltage is greater than or equal to 3.0V, is implemented in the large current charge of the next baby battery of general light intensity.
Under the low light level, to choose in the present embodiment and get the low light level for being lower than 0.5 intensity of illumination, the photovoltaic cell open circuit voltage has 1.5 ~ 2.9V, and can implement low current charge this moment to a baby battery.
Owing to only select a baby battery in the baby battery group to charge, and unlike other photovoltaic cell charging method, select whole baby battery group as the charging object.Therefore, no matter realized that by method and apparatus of the present invention high light still is can both charge to baby battery under the low light level.
This baby battery that charges electricity can be connected with other two baby batteries, for portable equipment provides energy.At this moment, the voltage that is full of this electric baby battery and other two baby batteries is not necessarily identical, and this does not influence use, the time that is their discharges is different, or remaining electric weight difference, because Ni-MH battery does not have memory effect, therefore, do not influence the normal use of charging next time or battery.
Below be the step of this enforcement, as shown in Figure 5:
1) controller regularly is respectively VB1, VB2, VB3, VB4 by VM1, VM2, VM3, VM4 detection baby battery NB1, NB2, NB3, NB4 voltage, when the value of VB1, VB2, VB3, VB4 during, forward step 2 to all more than or equal to Ni-MH battery Full Charge Capacity magnitude of voltage; When NB1 voltage and VB1＜1.51 when being minimum,, forward step 3 to the NB1 charging; When NB2 voltage and VB2＜1.51 when being minimum,, forward step 4 to the NB2 charging; When NB3 voltage and VB3＜1.51 when being minimum,, forward step 5 to the NB3 charging; When NB4 voltage and VB4＜1.51 when being minimum,, forward step 6 to the NB4 charging.
2) Full Charge Capacity state, NB1 ~ externally discharge of NB3 series connection is selected in the action of not charging this moment, and photovoltaic cell is externally discharge directly, and switch DK+1, DK+2, SK2, SK4, DK-1, DK-2 close, and rest switch disconnects, as shown in Figure 3.Forward step 1 to.
3) NB1 charged state is selected NB2 ~ externally discharge of NB4 series connection, and NB1 is a photovoltaic cell charging object, and switch CK+1, CK-1, DK+3, DK-3, SK4, SK5 close, and rest switch disconnects, and forwards step 1 to.
4) NB2 charged state is selected NB1, NB3, externally discharge of NB4 series connection, and NB2 is a photovoltaic cell charging object, and switch CK+2, CK-2, DK+2, DK-3, SK1, SK5 close, and rest switch disconnects, and forwards step 1 to.
5) NB3 charged state is selected NB1, NB2, externally discharge of NB4 series connection, and NB3 is a photovoltaic cell charging object, and switch CK+3, CK-3, DK+2, DK-3, SK2, SK3 close, and rest switch disconnects, and as shown in Figure 4, forwards step 1 to.
6) NB4 charged state is selected NB1, NB2, externally discharge of NB3 series connection, and NB4 is a photovoltaic cell charging object, and switch CK+4, CK-4, DK+2, DK-2, SK2, SK4 close, and rest switch disconnects, and forwards step 1 to.
Method proposed by the invention is accomplished in the laboratory of our company, and the photovoltaic battery-small battery charger of being realized can be given batteries charging under the different light power, improved charge efficiency.
In conjunction with the accompanying drawings specific embodiments of the invention are had been described in detail above, but the present invention is not restricted to the foregoing description, under the spirit and scope situation of the claim that does not break away from the application, those skilled in the art can make various modifications or remodeling.
Claims (5)
1. photovoltaic battery-small battery charging method is characterized in that, may further comprise the steps:
1) controller detects the voltage at each battery two ends of portable equipment baby battery group, according to predefined battery Full Charge Capacity threshold value, determines whether each battery needs charging and discharge battery;
2) when all baby batteries of baby battery group all are higher than predefined battery Full Charge Capacity threshold value, do not need charging, select N-1 externally discharge of baby battery series connection this moment, photovoltaic cell directly externally discharges;
3) when baby battery voltage is lower than predefined battery Full Charge Capacity threshold value, selecting a minimum baby battery of voltage is photovoltaic cell charging object, and all the other N-1 baby battery coupled in series are externally discharged;
4) through anti-adverse current diode, be communicated with that baby battery that need charge by opening and closing different switch combinations, and the battery of discharge;
5) when detecting that baby battery voltage that is recharged and reach predefined battery Full Charge Capacity threshold value, charging finishes;
Described baby battery is that open circuit voltage is lower with respect to other storage battery when its Full Charge Capacity, and the open circuit voltage of photovoltaic cell under low light environment can directly charge to baby battery.
2. photovoltaic battery-small battery charging method as claimed in claim 1 is characterized in that, described photovoltaic cell is composed in series by M 〉=2 a group photovoltaic electricity core.
3. photovoltaic battery-small battery charging method as claimed in claim 1 is characterized in that, described baby battery group is made up of N 〉=4 a group baby battery group.
4. photovoltaic battery-small battery charging method as claimed in claim 1, it is characterized in that, described anti-adverse current diode is to prevent the photovoltaic cell output voltage instability that causes when intensity of illumination is unstable, prevents that the photovoltaic cell group from producing adverse current when batteries charging.
5. photovoltaic battery-small battery charging method as claimed in claim 1 is characterized in that, it is the charging object of photovoltaic cell that described controller can be selected arbitrary baby battery, and photovoltaic cell charges to it; Select remaining N-1 externally discharge of baby battery series connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100795545A CN101257136B (en) | 2007-02-28 | 2007-02-28 | Photovoltaic battery-small battery charging method |
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| CN2007100795545A CN101257136B (en) | 2007-02-28 | 2007-02-28 | Photovoltaic battery-small battery charging method |
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| CN101257136B true CN101257136B (en) | 2011-03-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105576307B (en) * | 2015-12-11 | 2018-06-22 | 珠海格力电器股份有限公司 | The charging/discharging thereof of accumulator in photovoltaic system |
| CN106790865B (en) * | 2016-12-21 | 2019-08-30 | 北京晨客科技有限公司 | A kind of passive accumulation of energy charge mobile phone shell, mobile phone external member and mobile phone charging method |
| CN110350643A (en) * | 2019-07-15 | 2019-10-18 | 周建军 | A kind of Novel connecting method promoting photovoltaic efficiency |
| CN113839453B (en) * | 2021-11-26 | 2022-02-22 | 深圳市永联科技股份有限公司 | Battery control circuit, device and equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2566533Y (en) * | 2002-07-30 | 2003-08-13 | 代辉 | Portable multifunctional solar power supply device |
| JP2005229673A (en) * | 2004-02-10 | 2005-08-25 | Doshisha | Charging apparatus of capacitor by solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2566533Y (en) * | 2002-07-30 | 2003-08-13 | 代辉 | Portable multifunctional solar power supply device |
| JP2005229673A (en) * | 2004-02-10 | 2005-08-25 | Doshisha | Charging apparatus of capacitor by solar cell |
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Assignee: Beijing hengjiweiye Communication Technology Co. Ltd. Assignor: Hengjiweiye Investment Development Co., Ltd., Beijing Contract record no.: 2011110000192 Denomination of invention: Photovoltaic battery-small battery charging method Granted publication date: 20110330 License type: Exclusive License Open date: 20080903 Record date: 20111219 |
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