CN1996703A - A method and device for using photovoltaic battery self-adapted serial and parallel charging - Google Patents
A method and device for using photovoltaic battery self-adapted serial and parallel charging Download PDFInfo
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- CN1996703A CN1996703A CNA2006101607479A CN200610160747A CN1996703A CN 1996703 A CN1996703 A CN 1996703A CN A2006101607479 A CNA2006101607479 A CN A2006101607479A CN 200610160747 A CN200610160747 A CN 200610160747A CN 1996703 A CN1996703 A CN 1996703A
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Abstract
This invention provides one photo voltaic battery self-adaptive series charging device and method, which comprises photo voltaic battery set by z cells, with z more than two integral; photo voltaic batter voltage test VP to test voltaic battery output value; battery set composed of n cells with more than one integral; memory voltage tester to test battery set output values; controller to select photo voltaic battery inside connection type according to voltaic battery voltage tester and to select charge and discharge by output values.
Description
Technical field
The invention belongs to the photovoltaic cell technical field, particularly a kind ofly utilize photovoltaic battery self-adapted series-parallel method and apparatus.
Background technology
Because many with a plurality of electric cores series connection organizational forms at the solar cell that uses now, its shortcoming has that discharging current is little, adaptive ability is poor, conversion efficiency is low.Thereby limited the development of photovoltaic technology in some field, used as mobile phone power supply aspect, existing solar cell mobile phone only could be to cell-phone charging under high light.Therefore make the use of mobile phone produce many restrictions.Chinese patent application number is that 200420028283.2 application discloses a kind of portable photoelectricity power supply, and it is made up of electro-optical package, condenser, pressurizer and casing, can change, store and export luminous energy though this application discloses.But there is following problem in this application: portable set is charged with the electric weight of selecting storage thereby can not respond to extraneous light intensity automatically, charging voltage needs the long time can rise to best operating point, has therefore caused the charge efficiency reduction.According to the characteristic of existing photovoltaic cell, the photovoltaic cell of homalographic is under identical luminous intensity, and the pattern of being connected in series can obtain higher open circuit voltage, but short circuit current is very little simultaneously, and the photovoltaic cell of parallel connection, open circuit voltage is low, but short circuit current then is improved.
The present invention be directed to and efficiently utilize the luminous energy requirement and proposed the adaptive method of a kind of photovoltaic cell connection in series-parallel, this invention is by detecting luminous intensity, according to the different light intensity degree, select the connecting mode of the interior photovoltaic cell of photovoltaic cell group efficiently, realize efficient charging, under high light, the maximum current charging can replenish the electric weight that portable set normally uses consumption; Under general light intensity, large current charge can partly replenish the electric weight that portable set normally uses consumption; Under the low light level, low current charge, the electric weight that consumes in the time of can replenishing the portable set standby; The method that a kind of battery fills has mutually also been proposed simultaneously, when battery cell all is lower than the operating voltage of portable set, receive that simultaneously the battery that the user sends fills when instructing mutually, mutually fill unit by battery this moment, electric weight with high capacity cell, go in the small-capacity cells, promote the voltage of small-capacity cells, made things convenient for the user.
Summary of the invention
The invention provides a kind of device that utilizes photovoltaic battery self-adapted connection in series-parallel to charge, it comprises: photovoltaic cell, form by z photovoltaic cell, and wherein z is the integer more than or equal to 2; Photovoltaic cell voltage detector VP is used to detect the output valve of photovoltaic cell; Battery pack is made up of n storage battery, and n is the integer more than or equal to 1; Battery voltage detector is used for detecting the output valve of battery pack battery; Controller is used for selecting the inner connecting mode of photovoltaic battery and selecting the charge and discharge object according to the output valve of battery pack battery according to photovoltaic cell voltage detector VP output valve.
The present invention also provides a kind of photovoltaic battery self-adapted connection in series-parallel charging method, and it comprises step: the output valve according to n battery in the portable device battery group is selected the charge and discharge object, and wherein n is the integer more than or equal to 1; The value that detects according to photovoltaic cell voltage detector VP is selected the inside connecting mode of z photovoltaic cell, and wherein z is the integer more than or equal to 2.
The present invention also provides a kind of device that utilizes the connection in series-parallel of photovoltaic cell group self adaptation to charge, and it comprises: photovoltaic battery module, form by m photovoltaic cell group, and wherein m is the integer more than or equal to 2; Photovoltaic cell group voltage detector VP is used to detect the output valve of photovoltaic cell group; Battery pack is made up of n storage battery, and n is the integer more than or equal to 1; Battery voltage detector is used for detecting the output valve of battery pack battery; Controller is selected the charge and discharge object according to the output valve of battery in the battery pack; Select the connecting mode of photovoltaic battery pack according to the output valve of photovoltaic cell group voltage detector VP detection.
The present invention also provides a kind of photovoltaic cell group self adaptation connection in series-parallel charging method, and it comprises step: detect the output valve of n battery in the battery pack, select the charge and discharge object according to the output valve of battery in the battery pack, wherein n is the integer more than or equal to 1; The magnitude of voltage of the photovoltaic cell group that detects according to photovoltaic cell group voltage detector VP is selected the connecting mode of m photovoltaic cell group, and wherein m is the integer more than or equal to 2.
The present invention be directed to the method for efficiently utilizing the luminous energy requirement and having proposed a kind of photovoltaic battery self-adapted connection in series-parallel charging, this invention is by detecting photovoltaic cell open circuit output voltage, according to different magnitudes of voltage, select in the photovoltaic cell group of peak efficiency, the connecting mode of each photovoltaic cell is realized efficiently charging.Under high light, with the maximum current charging, can replenish portable set, the normal electric weight that consumes that uses; Under general light intensity, large current charge can partly replenish the electric weight that portable set normally uses consumption; Under the low light level, low current charge, the electric weight that consumes in the time of can replenishing the portable set standby.
Description of drawings
Fig. 1 is the principle schematic according to the photovoltaic cell group self adaptation connection in series-parallel charging device of the embodiment of the invention 1;
Fig. 2 is the schematic diagram according to the charged in parallel photovoltaic cell group connection of the embodiment of the invention 1;
Fig. 3 be according to the embodiment of the invention 1 also, the schematic diagram that connects of series hybrid charging photovoltaic cell group;
Fig. 4 is the schematic diagram according to the serial connection charge photovoltaic cell group connection of the embodiment of the invention 1;
Fig. 5 is the flow chart according to the photovoltaic cell group self adaptation connection in series-parallel charging device of the embodiment of the invention 1;
Fig. 6 is the principle schematic according to the photovoltaic cell group connection in series-parallel self adaptation charging device of the embodiment of the invention 2;
Fig. 7 is the schematic diagram according to the charged in parallel photovoltaic cell group connection of the embodiment of the invention 2;
Fig. 8 is the schematic diagram according to the serial connection charge photovoltaic cell group connection of the embodiment of the invention 2;
Fig. 9 is the flow chart according to the photovoltaic cell group connection in series-parallel self adaptation charging device of the embodiment of the invention 2;
Figure 10 is m the series-parallel structure chart of photovoltaic cell group self adaptation according to the embodiment of the invention;
Embodiment
Embodiment 1:
With reference to Fig. 1, be principle schematic according to the photovoltaic cell group connection in series-parallel self adaptation charging device of the embodiment of the invention.It includes, and by the photovoltaic battery module that photovoltaic cell group B1 to B4 forms, wherein each photovoltaic cell group is made of 9 photovoltaic cells; Switch P K+1～+ 4, PK-1～PK-4, SK1～SK3, KK, photovoltaic cell group voltage detector VP; Portable set lithium battery group MB1 and MB2 (below be called " battery pack "), anti-adverse current diode D1, switch CK1～CK2, DK1～DK3, battery voltage detector VM1～VM2 and controller, controller is selected the charge and discharge object according to the output valve of battery in the battery pack; Select the connecting mode of photovoltaic battery pack according to the output valve of photovoltaic cell group voltage detector VP detection.
Its middle controller is made up of the PIC18L series monolithic of low-power consumption band multi-channel A C, is used for the charging object and external discharge object of detection system state and inner connecting mode of control photovoltaic module and selective light battery module.The photocell group is the energy-supplementing source of system; Battery pack is used to portable set that power supply is provided; Anti-adverse current diode (to call " diode " in the following text), unilateral conduction according to diode, produce 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 photocell group from flowing to the electric current generation adverse current of battery pack under unsettled situation.
It is lithium battery that this embodiment selects storage battery, and its nominal voltage is 4.2V; Under high light, during a light intensity, single photovoltaic electricity core open circuit voltage is 0.5 volt, it is that 9 photovoltaic electricity cores are formed that this example adopts the photovoltaic cell group, so under a light intensity, single photovoltaic cell group open circuit voltage can reach 4.5 volts, adopt four photovoltaic cell group charged in parallels this moment, greatly limit has improved charging current, as shown in Figure 2.Under the general luminous intensity, be higher than 0.5 but be lower than 1 light intensity, single photovoltaic electricity core open circuit voltage can be 0.25 volt, and can be two groups this moment with the photovoltaic cell component, and the 1:B1 of group connects with B2, the 2:B3 of group connects with B4, and then group 1 is in parallel with group 2, as shown in Figure 3, like this under general light intensity, improved open circuit voltage, electric current output also is improved; Under the low light level, photovoltaic cell group coupled in series as shown in Figure 4, has greatly improved open circuit voltage, is implemented in low current charge under the low light level, and this electric current can replenish the portable set standby and consume.Having realized by method and apparatus of the present invention no matter intensity still is the low light level can both charge to portable set.
Below with reference to Fig. 5 flow process according to the embodiment of the invention 1 is described, magnitude of voltage is 4.2V during the lithium battery Full Charge Capacity of general portable set, and the Full Charge Capacity threshold values of therefore getting MB1, MB2 here is 4.2V.
(1) cut-off switch KK, SK1 ~ SK3, Closing Switch PK+1 ~ PK+4, PK-1 ~ PK-4 detect photocell group open circuit voltage Vp in parallel by VP, and when Vp 〉=4.5V, intensity of illumination is a high light, forwards step (2) to; As Vp＜4.5V and Vp 〉=2.25V, this moment, intensity of illumination was general light intensity, forwarded step (3) to; When Vp＜2.25V, be under the low light level this moment, forwards step (4) to.
(2) under the high light, the parallel connection of photocell group, cut-off switch SK1 ~ SK3, Closing Switch PK+1 ~ PK+4, PK-1 ~ PK-4; Forward step (5) to.
(3) under the general light intensity, photocell group series and parallel mixes and connects cut-off switch PK+2, PK+4, SK2, PK-1, PK-3, Closing Switch PK+1, PK+3, SK1, SK2, PK-2, PK-4; Forward step (5) to.
(4) under the low light level, photocell group coupled in series, cut-off switch PK+2 ~ PK+4, PK-1 ~ PK-3, Closing Switch SK1 ~ SK3; Forward step (5) to.
(5) controller reads battery voltage detector VM1, VM2 value, draws MB1, MB2 voltage is respectively VB1, VB2; As VB1＞4.2V, during VB2＞4.2V, battery pack need not charged, and is in the Full Charge Capacity state, forwards step (6) to; As VB1＜VB2, and VB1≤4.2V, select MB1 to be the charging object, MB2 is the object that externally discharges, and forwards step (7) to; As VB2＜VB1, and VB2≤4.2V, select MB2 to be the charging object, MB1 is the object that externally discharges, and forwards step (8) to.
(6) battery pack Full Charge Capacity state, selecting MB1 is the object that externally discharges, directly externally discharge of photovoltaic module simultaneously, K switch K, DK1, DK3 close, switch CK1, CK2, DK2 disconnection; Forward step (9) to.
(7) to battery MB1 charging, selecting MB1 is the charging object of photovoltaic module, and MB2 is the object that externally discharges, and K switch K, CK1, DK2 close, and switch CK2, DK1, DK3 disconnect; Forward step (9) to.
(8) to battery MB2 charging, selecting MB2 is the charging object of photovoltaic module, and MB1 is the object that externally discharges, and K switch K, CK2, DK1 close, and switch CK1, DK2, DK3 disconnect, and forward step (9) to.
(9) system had a rest for 10 seconds, forwarded step (1) to.
Embodiment 2:
With reference to Fig. 6, be principle schematic according to the photovoltaic cell group connection in series-parallel self adaptation charging device of the embodiment of the invention 2.By the photovoltaic cell group (hereinafter referred to as " photocell group ") that photovoltaic cell B1 to B3 forms, wherein the photovoltaic cell group is formed switch P K+1～PK+3, PK-1～PK-3, SK1～SK2, KK, photovoltaic cell group voltage detector VP by 9 photovoltaic electricity cores; Portable set lithium battery group MB1, anti-adverse current diode D1, switch CK1, DK1～DK2, battery voltage detector VM1 and controller are formed.
When the group number of photocell group was 2 or 3, the connecting mode of photovoltaic cell group had only two kinds; Coupled in series, parallel connection.This embodiment chooses photovoltaic battery module and is made up of 3 photovoltaic cell groups, therefore has only two kinds of connecting modes.
It is 4.2V that this embodiment selects the lithium battery nominal voltage; Under high light, during a light intensity, single photovoltaic electricity core open circuit voltage is 0.5 volt, this example adopts the photovoltaic cell group to be made up of 9 photovoltaic electricity cores, so under a light intensity, single photovoltaic cell group open circuit voltage can reach 4.5 volts, adopt three photovoltaic cell group charged in parallels this moment, greatly limit has improved charging current, as shown in Figure 7.Under the general luminous intensity and the low light level, be lower than 1 light intensity, single photovoltaic electricity core open circuit voltage is the highest to can be 0.49 volt, and adopt the serial connection charge mode this moment, as shown in Figure 8, under the general light intensity and the low light level, improved open circuit voltage like this, and electric current output also is improved.
Below with reference to Fig. 9 flow process according to the embodiment of the invention 2 is described.
(1) cut-off switch KK, SK1 ~ SK2, Closing Switch PK+1 ~ PK+3, PK-1 ~ PK-3 detect photocell group open circuit voltage Vp in parallel by VP, and when Vp 〉=4.5V, intensity of illumination is a high light, forwards step (2) to; As Vp＜4.5V, this moment, intensity of illumination was under the general light intensity or the low light level, forwarded step (3) to.
(2) under the high light, the parallel connection of photocell group, cut-off switch SK1 ~ SK2, Closing Switch PK+1 ~ PK+3, PK-1 ~ PK-3; Forward step (4) to.
(3) under the general light intensity or under the low light level, photocell group coupled in series, cut-off switch PK+2, PK+3, PK-1, PK-2, Closing Switch PK+1, SK1, SK2, PK-3; Forward step (5) to.
(4) controller reads battery voltage detector VM1 value, and obtaining MB1 voltage is VB1; When VB1＞4.2V, battery pack need not charged, and is in the Full Charge Capacity state, forwards step (5) to; As VB1≤4.2V, select MB1 to be the charging object, also be simultaneously external discharge object, forward step (7) to.
(5) battery pack Full Charge Capacity state, selecting MB1 is the object that externally discharges, directly externally discharge of photovoltaic module simultaneously, K switch K, DK1, DK2 close, switch CK1 disconnection; Forward step (8) to.
(7), select MB1 to be all the charging object of photovoltaic module and the object that externally discharges to battery MB1 charging; K switch K, CK1, DK1 close, and switch DK2 disconnects; Forward step (8) to.
(8) system had a rest for 10 seconds, forwarded step (1) to.
Situation when illustrating that below with reference to Figure 10 quantity when the photovoltaic cell group is arbitrary integer value m, wherein m is more than or equal to 4, and under high light, it is in parallel adopting photocell group connecting mode, the parallel connection of m photovoltaic cell group is externally discharged, and realizes maximum charging current output; Under general light intensity, adopting photocell group connecting mode is that series, parallel mixes connection, adjacent x photovoltaic cell group series connection, form series connection group, x is the integer smaller or equal to m/2, and then, realizing large current charge by the continuous externally discharge of the parallel connection of y series connection group, y is the integer that the value of m/x rounds downwards; Under the low light level, adopt photocell group connecting mode to be series connection, m battery pack coupled in series externally discharged, and is implemented in low current charge under the low light level.
The device that utilizes the connection in series-parallel of battery battery core self adaptation to charge according to the embodiment of the invention 3 is described below, and it comprises photovoltaic cell, is made up of z photovoltaic electricity core, and wherein z is the integer more than or equal to 2; Photovoltaic electricity core voltage detector VP is used to detect single or multiple photovoltaic electricity core output valves; Controller is selected the inner connecting mode of photovoltaic battery pack according to output valve, and battery voltage detector detects cell voltage in the battery pack, and controller is selected the charge and discharge object according to the magnitude of voltage of battery in the battery pack; Battery pack is made up of n storage battery, and n is the integer more than or equal to 1.Detecting the single-unit photovoltaic electricity core voltage that obtains by photovoltaic electricity core voltage detector is Vp, if the nominal voltage of storage battery is Vb, have this moment c electric core to be composed in series series connection group, and then by the externally discharge that is together in parallel of d series connection group, z, VP, Vb, c, d concerns has:
C=Vb/Vp, c are that the nominal voltage Vb of storage battery rounds up divided by the value of single-unit photovoltaic electricity core voltage;
D=z/c, d are that total photovoltaic electricity core is counted z and counted c divided by the photovoltaic electricity core that is together in series and round downwards.
When the voltage of all batteries of battery pack during greater than the Full Charge Capacity threshold value, system need not charge, and is in the Full Charge Capacity state, selects the arbitrary battery in the batteries externally to discharge, and the photovoltaic cell group is externally discharge directly.
When having cell voltage to be lower than the Full Charge Capacity threshold value in the battery pack, start the photovoltaic cell group to batteries charging, preferentially choosing the battery that voltage is minimum in the battery pack is the charging object of photovoltaic cell group, the battery that voltage is the highest in the battery pack is the object that externally discharges, when n equals 1, as long as this cell voltage is lower than the Full Charge Capacity threshold value, select this battery to be charging object and external discharge object simultaneously.
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 (20)
1. device that utilizes photovoltaic battery self-adapted connection in series-parallel to charge is characterized in that comprising:
The photovoltaic cell group is made up of z photovoltaic cell, and wherein z is the integer more than or equal to 2;
Photovoltaic cell group voltage detector VP is used to detect the output valve of single or multiple photovoltaic cells;
Battery pack is made up of n storage battery, and n is the integer more than or equal to 1;
Battery voltage detector is used for detecting the output valve of battery pack battery;
Controller is used for selecting photovoltaic inside battery connecting mode and selecting the charge and discharge object according to the output valve of battery pack battery according to photovoltaic cell voltage detector VP output valve.
2. according to the described device of claim 1, it is characterized in that further comprising:
Anti-adverse current diode is used to prevent that the photovoltaic cell group from producing adverse current when batteries charging.
3. according to any one described device of claim 1 to 2, it is characterized in that:
Detecting the single-unit photovoltaic cell open circuit voltage that obtains by photovoltaic cell group voltage detector VP is Vp, if the nominal voltage of storage battery is Vb, have c battery strings joint group to become series connection group this moment, and then be together in parallel by d series connection group and externally discharge, and z, VP, Vb, c, d concerns has:
C=Vb/Vp, c are that the nominal voltage Vb of storage battery rounds up divided by the value of single-unit photovoltaic cell voltage;
D=z/c, d are that total photovoltaic cell is counted z and counted c divided by the photovoltaic cell that is together in series and round downwards.
4. according to any one described device of claim 1 to 3, it is characterized in that:
When the voltage of all batteries of battery pack during greater than the Full Charge Capacity threshold value, select the arbitrary battery in the batteries externally to discharge, the photovoltaic cell group is externally discharge directly.
5. according to any one described device of claim 1 to 4, it is characterized in that:
When having cell voltage to be lower than the Full Charge Capacity threshold value in the battery pack, start the photovoltaic cell group to batteries charging, preferentially choosing the battery that voltage is minimum in the battery pack is the charging object of photovoltaic cell group, the battery that voltage is the highest in the battery pack is the object that externally discharges, when n equals 1, as long as this cell voltage is lower than the Full Charge Capacity threshold value, select this battery to be charging object and external discharge object simultaneously.
6. device that utilizes the connection in series-parallel of photovoltaic cell group self adaptation to charge is characterized in that comprising:
Photovoltaic battery module is made up of m photovoltaic cell group, and wherein m is the integer more than or equal to 2;
Photovoltaic cell group voltage detector VP is used to detect the output valve of photovoltaic cell group;
Battery pack is made up of n storage battery, and n is the integer more than or equal to 1;
Battery voltage detector is used for detecting the output valve of battery pack battery;
Controller is selected the charge and discharge object according to the output valve of battery in the battery pack; Select the connecting mode of photovoltaic battery pack according to the output valve of photovoltaic cell group voltage detector VP detection.
7. according to the described device of claim 6, it is characterized in that further comprising:
Anti-adverse current diode is used under the unsettled situation of photovoltaic cell output voltage, prevents that the photovoltaic cell group from producing adverse current when batteries charging.
8. according to claim 6 or 7 described devices, it is characterized in that:
When the voltage of all batteries of battery pack during greater than the Full Charge Capacity threshold value, select the arbitrary battery in the batteries externally to discharge, photovoltaic battery module is externally discharge directly.
9. according to any one described device of claim 6 to 8, it is characterized in that:
When having cell voltage to be lower than the Full Charge Capacity threshold value in the battery pack, start photovoltaic battery module to batteries charging, preferentially choosing the battery that voltage is minimum in the battery pack is the charging object of photovoltaic battery module, the battery that voltage is the highest in the battery pack is the object that externally discharges, when n equals 1, as long as this cell voltage is lower than the Full Charge Capacity threshold value, select this battery to be charging object and external discharge object simultaneously.
10. according to any one described device of claim 6 to 9, it is characterized in that:
When the photocell group was counted m and is 2 or 3, the connecting mode of photovoltaic cell group had two kinds: coupled in series, parallel connection;
Under high light, the parallel connection of m photovoltaic cell group is externally discharged, and realizes maximum charging current output;
Under non-high light, m photovoltaic cell group coupled in series externally discharged.
11., it is characterized in that according to any one described device of claim 6 to 10:
Count m more than or equal to 4 the time when the photocell group, the connecting mode of photovoltaic cell group has three kinds: coupled in series, and parallel connection, series and parallel mixes and connects;
Under high light, the parallel connection of m photovoltaic cell group is externally discharged, and realizes maximum charging current output;
Under general light intensity, series connection group is formed in adjacent x photovoltaic cell group series connection, and x is the integer smaller or equal to m/2, and then by the continuous externally discharge of the parallel connection of y series connection group, realizes large current charge, and y is the integer that the value of m/x rounds downwards;
Under the low light level, m photovoltaic cell group coupled in series externally discharged, and is implemented in low current charge under the low light level.
12. a method of utilizing photovoltaic battery self-adapted connection in series-parallel charging is characterized in that:
Output valve according to n battery of portable device battery group is selected the charge and discharge object, and wherein n is the integer more than or equal to 1;
The value that detects according to photovoltaic cell voltage detector VP is selected the inside connecting mode of z photovoltaic cell, and wherein z is the integer more than or equal to 2.
13. method according to claim 12 is characterized in that:
Detecting the single-unit photovoltaic cell open circuit voltage that obtains by photovoltaic cell voltage detector VP is Vp, if the nominal voltage of storage battery is Vb, have c battery strings joint group to become series connection group this moment, and then be together in parallel by d series connection group and externally discharge, and z, VP, Vb, c, d concerns has:
C=Vb/Vp, c are that the nominal voltage Vb of storage battery rounds up divided by the value of single-unit photovoltaic cell voltage;
D=z/c, d are that total photovoltaic cell is counted z and counted c divided by the photovoltaic cell that is together in series and round downwards.
14., it is characterized in that according to claim 12 or 13 described methods:
When the voltage of all batteries of battery pack during greater than the Full Charge Capacity threshold value, select the arbitrary battery in the batteries externally to discharge, the photovoltaic cell group is externally discharge directly.
15., it is characterized in that according to any one described device of claim 12 to 14:
When having cell voltage to be lower than the Full Charge Capacity threshold value in the battery pack, start the photovoltaic cell group to batteries charging, preferentially choosing the battery that voltage is minimum in the battery pack is the charging object of photovoltaic cell group, the battery that voltage is the highest in the battery pack is the object that externally discharges, when n equals 1, as long as this cell voltage is lower than the Full Charge Capacity threshold value, select this battery to be charging object and external discharge object simultaneously.
16. a method of utilizing photovoltaic cell group self adaptation connection in series-parallel charging is characterized in that:
Detect the output valve of n battery in the battery pack, select the charge and discharge object according to the output valve of battery in the battery pack, wherein n is the integer more than or equal to 1;
The output valve of the photovoltaic cell group that detects according to photovoltaic cell group voltage detector VP is selected the connecting mode of m photovoltaic cell group in the photovoltaic battery module, and wherein m is the integer more than or equal to 2.
17. method according to claim 16 is characterized in that:
When the voltage of all batteries of battery pack during greater than the Full Charge Capacity threshold value, a wherein battery of selecting battery pack this moment is external discharge object, directly externally discharge of photovoltaic battery module simultaneously.
18., it is characterized in that according to claim 16 or 17 described methods:
When having cell voltage to be lower than the Full Charge Capacity threshold value in n the battery pack, start photovoltaic battery module to batteries charging, preferentially choosing the battery that voltage is minimum in the battery pack is the charging object of photovoltaic battery module, the battery that voltage is the highest in the battery pack is the object that externally discharges, when n equals 1, as long as this cell voltage is lower than the Full Charge Capacity threshold value, select this battery to be charging object and external discharge object simultaneously.
19., it is characterized in that according to any one described method of claim 16 to 18:
When the photocell group was counted m and is 2 or 3, the connecting mode of photovoltaic cell group had two kinds: coupled in series, parallel connection;
Under high light, the parallel connection of m photovoltaic cell group is externally discharged, and realizes maximum charging current output;
Under non-high light, m photovoltaic cell group coupled in series externally discharged.
20., it is characterized in that according to any one described method of claim 16 to 18:
Count m more than or equal to 4 the time when the photocell group, the connecting mode of photovoltaic cell group has three kinds: coupled in series, and parallel connection, series and parallel mixes and connects;
Under high light, the parallel connection of m photovoltaic cell group is externally discharged, and realizes maximum charging current output;
Under general light intensity, series connection group is formed in adjacent x photovoltaic cell series connection, and x is the integer smaller or equal to m/2, and then by the continuous externally discharge of the parallel connection of y series connection group, realizes large current charge, and y is the integer that the value of m/x rounds downwards;
Under the low light level, m photovoltaic cell group coupled in series externally discharged, and is implemented in low current charge under the low light level.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101607479A CN100403620C (en) | 2006-11-30 | 2006-11-30 | A method and device for using photovoltaic battery self-adapted serial and parallel charging |
| PCT/CN2007/071120 WO2008064605A1 (en) | 2006-11-30 | 2007-11-23 | A method, an apparatus and a system for supplying power with photovoltaic cells |
| JP2007309137A JP2008228558A (en) | 2006-11-30 | 2007-11-29 | Method, arrangement, and system of power supply using photoelectric cell |
| EP20070122000 EP1928070A2 (en) | 2006-11-30 | 2007-11-30 | Method for supplying power with light voltage battery, device and system thereof |
| US11/948,004 US20080211451A1 (en) | 2006-11-30 | 2007-11-30 | Method for supplying power with light voltage battery, device and system thereof |
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