CN109286234A - A kind of charging method based on intelligent photovoltaic power generation array - Google Patents
A kind of charging method based on intelligent photovoltaic power generation array Download PDFInfo
- Publication number
- CN109286234A CN109286234A CN201811249551.6A CN201811249551A CN109286234A CN 109286234 A CN109286234 A CN 109286234A CN 201811249551 A CN201811249551 A CN 201811249551A CN 109286234 A CN109286234 A CN 109286234A
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- China
- Prior art keywords
- single battery
- battery
- power generation
- control system
- setting value
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
Abstract
The present invention provides a kind of charging method based on intelligent photovoltaic power generation array, it on the basis of conventional photovoltaic array by introducing monolithic machine testing control technology and carrying out the corresponding control for connecting circuit, it reaches through automatic conversion internal circuit connection type, match current battery voltage, the advantages of increasing output current boost charge efficiency, it is easy to operate.
Description
Technical field
The present invention relates to a kind of charging method based on intelligent photovoltaic power generation array, in particular to arriving a kind of application
In the charging method of the photovoltaic power generation array of the household small-size independent type photovoltaic power generation system of no maximum power point tracking system.
Background technique
Currently, with the continuous maturation of photovoltaic technology, small-sized household independent type photovoltaic power generation system starts gradually to enter into people
Daily life, especially have independent courtyard the vast rural areas have been obtained it is a degree of application and have
Vast potential for future development.During actual use, when battery voltage is lower, even if photovoltaic array has compared with Gao get Kai
Road voltage, but influenced after being connected to controller by battery voltage, output voltage is lower, and a part of power is disappeared by controller
Consumption.Therefore, if the open-circuit voltage of photovoltaic array is suitably reduced, increase the output electric current of photovoltaic array as far as possible, then can be promoted
Charge efficiency.
Summary of the invention
The object of the present invention is to provide a kind of charging methods based on intelligent photovoltaic power generation array, by conventional photovoltaic
Monolithic machine testing control technology is introduced on the basis of array and carries out the control of corresponding connection circuit, is reached by automatic
The advantages of converting internal circuit connection type, match current battery voltage, increasing output current boost charge efficiency, operation letter
It is single.
The present invention can be achieved through the following technical solutions:
A kind of charging method based on intelligent photovoltaic power generation array, the single battery unit inside photovoltaic array are successively marked in order
It number is the 1st, 2,3 ... No. N, wherein N is natural number even number greater than 1, it is characterised in that:
Step 1: disconnecting the positive master switch of intelligent photovoltaic power generation array every a set time；
Step 2: it is simultaneously passed through center control system by the open-circuit voltage and battery current voltage of measurement intelligent photovoltaic power generation array
Input port of uniting is sent into central control system, and central control system calculates the ratio of both open-circuit voltage and battery current voltage
Value；
If the ratio is greater than a setting value A1, central control system is by output port to the single battery list of label N and N-1
Member executes step 3；
If the ratio executes step to the single battery unit of label 1 and 2 by output port less than a setting value A2, single-chip microcontroller
Rapid 4；
Step 3: central control system controls the two-way switch between two single battery units by output port, makes two lists
It is parallel connection between body battery unit；
Step 4, central control system control the two-way switch between two single battery units by output port, make two lists
It is series connection between body battery unit；
Repeat step 2；
If the ratio is greater than a setting value A1, single-chip microcontroller controls label to the single battery list of N-2 and N-3 by output port
Member executes step 3；
If the ratio is held less than a setting value A2, single-chip microcontroller by the single battery unit that output port is controlled marked as 3 and 4
Row step 4；
And so on, until the ratio size of the intelligent photovoltaic array open-circuit voltage and battery current voltage is located at setting value
Between A1 and setting value A2；
It is closed master switch.
Further, the present invention can be realized using following technical scheme:
The central control system is PC control system or single-chip microcontroller.
The battery cell unit is not merely single battery piece, can also be parallel connection, the series connection of several single battery pieces
Or the structure of mixed connection.
The setting value A1 is 1.5, and setting value A2 is 1.3.
The switch is relay.
The above method can use in the photovoltaic array with flowering structure: a kind of intelligent photovoltaic array, and interior label is surprise
Anode one two-way switch of setting of the single battery unit of number N-1, the single battery unit adjacent thereto marked as even number N
Cathode is again provided with a two-way switch；The cathode of single battery unit marked as odd number N-1 is connected with a conducting wire, conducting wire
The other end be the single battery unit cathode being arranged in marked as even number N on two-way switch a connecting terminal；
The anode of single battery unit marked as even number N is connected with a conducting wire, the other end of conducting wire be the setting marked as
One connecting terminal of the two-way switch on the single battery unit anode of odd number N-1；Two monomers marked as N-1, N
One conducting wire is set between battery unit, and the both ends of the conducting wire are respectively another the respective connection touching of described two two-way switch
Point；A master switch is provided on the positive electrode of photovoltaic array；Photovoltaic power generation array is positive and negative to acquire photovoltaic array with one
The central control system of interpolar total voltage and control two-way switch, input port are respectively connected to photovoltaic array positive and negative anodes and storage
Battery electrode, output port are respectively connected to each double-direction control switch.
The advantages of this programme, is: can be current to photovoltaic array by central control system voltage or current value
It is acquired processing, and carries out the control of two-way switch by output port, completes connection type between photovoltaic array battery cell
Conversion, improve charge efficiency.
Detailed description of the invention
The structural schematic diagram for the Intelligent photovoltaic system that Fig. 1 is applicable in for the present invention.
Wherein 1-8 is single battery blade unit 1- single battery blade unit 8.
Specific embodiment
Hereinafter reference will be made to the drawings, and 1 the present invention will be described in more detail, below in explanation, is omitted to those skilled in that art
Descriptions of well-known structures and technologies.
Embodiment 1: as shown in fig. 1, this photovoltaic power generation array is made of 8 single battery blade units, each monomer electricity
Pond blade unit open-circuit voltage is 6V, if all switches are placed in A or B contact in Fig. 1, total open-circuit voltage 48V can be used for 24V
The battery of standard charges.It now needs that battery open-circuit voltage can will be then set as to 24V, then utilized to the battery charging of 12V
Keys of single chip microcomputer module inputs the voltage data of 24V, and single-chip microcontroller executes program at this time:
Step 1 disconnects master switch S0；
Step 2, acquisition photovoltaic power generation array both ends open-circuit voltage simultaneously compare its 18V；
If current open circuit voltage is greater than 18V, the switch between single battery blade unit 7 and single battery blade unit 8 is carried out
Step 3, the series-parallel conversion between single battery blade unit 7 and single battery blade unit 8 is completed.Step 3 content are as follows:
Switch S1, S2 are switched to the contact C, D by original A, B contact by control section by step 3 respectively；
Repeat step 2；
If current open circuit voltage is still greater than 18V, to the switch between single battery blade unit 5 and single battery blade unit 6
Step 3 is carried out, the series-parallel conversion between single battery blade unit 5 and single battery blade unit 6 is completed；
And so on, until open-circuit voltage is 18V or completes between single battery blade unit 1 and single battery blade unit 2
Series-parallel conversion；
It is closed master switch S0.
After the above process, the open-circuit voltage of photovoltaic power generation array becomes 24V from 48V, maximum power point in 18V or so,
It can charge to the battery of 12V.
Embodiment 2: it as shown in Figure 1, this photovoltaic power generation array is made of 8 single battery blade units, is now connected to
Controller is that normal voltage is the charging of 24V battery.If voltage is lower at the beginning for battery, to improve charge efficiency, reduce control
Device power loss processed, single-chip microcontroller execute program:
Step 1 disconnects switch S0 every a setting time
Step 2 acquires photovoltaic power generation array both ends open-circuit voltage and battery voltage respectively and calculates the two ratio；
If photovoltaic power generation array both end voltage and battery voltage ratio are greater than 1.5, single battery blade unit 7 and 8 is carried out
Step 3 operation:
Two-way switch is placed in the contact C or D by control section by step 3, is measured photovoltaic power generation array both end voltage and is calculated it
Whether it is greater than 1.5 with battery voltage ratio；
If being still greater than 1.5, single battery blade unit 5 and 6 is carried out to repeat step 3 operation, and so on；Until when photovoltaic is sent out
Electric array both end voltage and calculate its with battery voltage ratio less than 1.5 when, panel array no longer self adjust；
Closure switch S0, charging start to carry out.
Because in the present embodiment, with the progress of charging process, battery voltage is gradually risen, solar panel open-circuit voltage with
With raising, charging can just be made to continue and guarantee charge efficiency.Therefore, during the charging process, following procedure step is executed:
Step 1 disconnects switch S0 every a set time
Step 2 acquires photovoltaic power generation array both ends open-circuit voltage and battery voltage respectively and calculates the two ratio；
If photovoltaic power generation array both end voltage and battery voltage ratio less than 1.3, carry out single battery blade unit 1 and 2
Step 4 operation:
Two-way switch is placed in A or B contact by control section by step 4, is measured photovoltaic power generation array both end voltage and is calculated it
With battery voltage ratio whether less than 1.3；
If carrying out repeating step 4 operation to single battery blade unit 3 and 4 still less than 1.3, and so on, until voltage ratio
Not less than 1.3；
Closure switch S0, charging continue.
It is described by the principle of the above process, in the present embodiment, this intelligent photovoltaic power generation array system is 24V electric power storage
The course of work of pond charging is as follows:
Charging is initial, and battery voltage is lower and photovoltaic power generation array open-circuit voltage is higher, therefore, radical in photovoltaic power generation array
Single battery blade unit 7 and 8 is first subjected to series connection and turns parallel operation, if two-way switch is originally between single battery blade unit 7 and 8
It is placed in the contact C or D, then is maintained the original state constant；It then proceedes to measurement open-circuit voltage and calculates whether ratio is 1.5, if photovoltaic is sent out
Electric array open circuit voltage is still excessively high, then by single battery blade unit 5 and 6 carry out series connection turn parallel operation, and so on until opening
Road voltage and the ratio of current battery voltage match.Charging original state is avoided, leads to light because battery voltage is too low
Volt power generation array output voltage can not increase, the power of photovoltaic power generation array too much by controller " eating up " the case where.Simultaneously
More importantly the output electric current of photovoltaic power generation array changes as the series connection of internal single battery blade unit turns connection in parallel
And increase, it can be improved charge efficiency, especially when single battery blade unit 7 and 8,5 and 6,3 and 4 have been in parallel connection, electricity
Pond single battery blade unit 1 and 2 can observe output electric current by the operation that series connection turns parallel connection and obviously become larger, therefore, battery
Initial charge is faster.Stand alone type distribution power generation without peak power output tracking dot system of the above structure in Rural Areas at Present area
System with good application prospect, without increasing multi-part and without apparent cost increase.
Can also further, between single battery unit 2 and single battery unit 3, single battery unit 6 and monomer electricity
The two-way switch is respectively set between one and single battery unit 1 and single battery unit 2 between pool unit 7 and connect and leads
The identical structure of line, to press lower battery or the battery to charge under original state to charge to full charge.Such as at this
It, can be equal in battery cell battery blade unit 7 and 8,5 and 6,3 and 4,1 and 2 if battery initial state voltage is too low in example
On the basis of parallel connection, further between single battery unit 2 and single battery unit 3, single battery unit 6 and monomer electricity
Two-way switch between pool unit 7 carries out the operation that series connection turns in parallel, and entire photovoltaic array is made to be in single battery unit 1-4
Be connected in parallel to each other structure, and single battery unit 5-8 is the structure that is connected in parallel to each other, and two single battery unit groups in parallel carry out concatenated again
Structure further increases charging current.Between i.e. above-mentioned single battery unit 1 and single battery unit 2 two-way switch and
The identical structure of connecting wire can be arranged according to actual needs between any two single battery unit.
As charging progresses, battery voltage gradually rises, photovoltaic power generation array internal cell single battery blade unit
Since 1 and 2 gradually and turn string, to improve voltage.In the present embodiment, when battery full charge pressure 24V, photovoltaic power generation array
Internal single battery blade unit 1 and 2,3 and 4 are series connection, and 5 and 6,7 and 8 be parallel connection.
For writing for program, it can use but be not limited to use relay as two-way opened between single battery blade unit
It closes, if open-circuit voltage is excessively high, single-chip microcontroller successively exports " 1 " to the relay between 7 and 8 by output port, successively makes 7 Hes
Relay contact between 8 connects C or D point, completes the operation that series connection turns in parallel；If voltage is still excessively high, between 5 and 6
Relay repeats same step, and so on until voltage matches battery initial voltage；If opening a way as charging progresses
Voltage needs to increase, then single-chip microcontroller successively exports the relay between 1 and 2,3 and 4,5 and 6,7 and 8 by output port
"0".In the present embodiment, single battery blade unit quantity is few, and simpler binary control code operation can also be used.Example
Such as: 1 and 2,3 and 4 be series connection, is parallel connection between 5 and 6,7 and 8, then the control routine in program is " 0011 " at this time, if measuring
Open-circuit voltage is excessively high, then control routine is that " 0011 " is moved to the left one, and " 1 " is filled out on the right, becomes " 0111 ", or measure open circuit electricity
Press through it is low, then control routine be " 0011 " move right one, " 0 " is filled out on the left side, becomes " 0001 ".In actual use,
If single battery blade unit quantity is more, it is also possible to single-chip microcomputer output mouth are connected to an output control module, output is controlled
The output port of molding block is connected to each relay.Above content is well known to those skilled in the art technology, herein no longer
It repeats.
It should be pointed out that the battery cell unit is not merely single battery piece in embodiments herein,
It can be the specific connection structure of several single battery pieces, such as parallel connection, series connection or the hybrid connected structure of single battery piece.Such as by general
The polysilicon chip of logical 22cm × 22cm connects and composes；The battery cell unit, battery voltage value say for convenience
Setting is stated, is subject to the scale and battery model of photovoltaic power generation array in actual use；One secondary program of every execution it
Between time interval can also sets itself；Described voltage ratio 1.3,1.5 etc. can also be in actual use according to charging effect certainly
Row adjusts in a program.
It is placed in the photovoltaic cell chip arrays back side finally, should finally be fixed according to single-chip microcontroller and keeps certain with the back side
Distance or other shady places avoid temperature excessively high.
The application example of technical solution of the present invention is described in detail above, it is only provided as an example, is not intended as the present invention
Application limitation.The equivalent replacement of all operating conditions, is within the scope of the present invention.
Claims (5)
1. a kind of charging method based on intelligent photovoltaic power generation array, the single battery unit inside photovoltaic array is in order successively
Marked as the 1st, 2,3 ... No. N, wherein N is the natural number even number greater than 1, it is characterised in that:
Step 1: disconnecting the positive master switch of intelligent photovoltaic power generation array every a set time；
Step 2: it is simultaneously passed through center control system by the open-circuit voltage and battery current voltage of measurement intelligent photovoltaic power generation array
Input port of uniting is sent into central control system, and central control system calculates the ratio of both open-circuit voltage and battery current voltage
Value；
If the ratio is greater than a setting value A1, central control system is by output port to the single battery list of label N and N-1
Member executes step 3；
If the ratio executes step to the single battery unit of label 1 and 2 by output port less than a setting value A2, single-chip microcontroller
Rapid 4；
Step 3: central control system controls the two-way switch between two single battery units by output port, makes two lists
It is parallel connection between body battery unit；
Step 4, central control system control the two-way switch between two single battery units by output port, make two lists
It is series connection between body battery unit；
Repeat step 2；
If the ratio is greater than a setting value A1, single-chip microcontroller controls label to the single battery list of N-2 and N-3 by output port
Member executes step 3；
If the ratio is held less than a setting value A2, single-chip microcontroller by the single battery unit that output port is controlled marked as 3 and 4
Row step 4；
And so on, until the ratio size of the intelligent photovoltaic array open-circuit voltage and battery current voltage is located at setting value
Between A1 and setting value A2；
It is closed master switch.
2. a kind of charging method based on intelligent photovoltaic power generation array as described in claim 1, it is characterised in that: the center
Control system is PC control system or single-chip microcontroller.
3. the battery cell unit is not merely single battery piece, can also for the parallel connection of several single battery pieces, series connection or
The structure of mixed connection.
4. the setting value A1 is 1.5, setting value A2 is 1.3.
5. the switch is relay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249551.6A CN109286234B (en) | 2018-10-25 | 2018-10-25 | Charging method based on intelligent photovoltaic power generation array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249551.6A CN109286234B (en) | 2018-10-25 | 2018-10-25 | Charging method based on intelligent photovoltaic power generation array |
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| CN109286234A true CN109286234A (en) | 2019-01-29 |
| CN109286234B CN109286234B (en) | 2021-09-21 |
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| CN108539729A (en) * | 2018-05-08 | 2018-09-14 | 上海电力学院 | The control method for coordinating of direct-current grid is stored up based on island mode light |
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2018
- 2018-10-25 CN CN201811249551.6A patent/CN109286234B/en active Active
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|---|---|---|---|---|
| CN201839231U (en) * | 2010-07-09 | 2011-05-18 | 中海阳(北京)新能源电力股份有限公司 | Busbar chamber capable of intelligently switching series-parallel connection mode of solar battery pack |
| US9973020B2 (en) * | 2014-09-23 | 2018-05-15 | The Gillette Company | Method for charging a rechargeable battery of an electric device |
| CN105914823A (en) * | 2016-05-11 | 2016-08-31 | 大连理工大学 | Control method of increasing supercapacitor energy utilization rate |
| CN106530588A (en) * | 2016-12-08 | 2017-03-22 | 枣庄学院 | Novel multifunctional alarm desk powered by solar energy and wind energy |
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