CN102290844B - Modularized photovoltaic charge control system of storage battery pack and control method thereof - Google Patents
Modularized photovoltaic charge control system of storage battery pack and control method thereof Download PDFInfo
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- CN102290844B CN102290844B CN2011102369981A CN201110236998A CN102290844B CN 102290844 B CN102290844 B CN 102290844B CN 2011102369981 A CN2011102369981 A CN 2011102369981A CN 201110236998 A CN201110236998 A CN 201110236998A CN 102290844 B CN102290844 B CN 102290844B
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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
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Abstract
The invention discloses a modularized photovoltaic charge control system of a storage battery pack and a control method thereof. The system comprises N charge controllers, N solar energy arrays, the storage battery pack and a management module, wherein N is an integer which is more than or equal to 1; the solar energy arrays are correspondingly connected with one charge control module respectively; each charge control module is connected with the storage battery pack; and the N charge control modules and the management module are connected by CAN (controller area network) buses so as to realize the cooperative work of the modules, thereby controlling the charge. The system and the method provided by the invention can be applied to the storage battery packs with different capacities, are used to improve the charge efficiency and ensure the stable voltages of the storage battery pack in a charge state, and are beneficial to prolonging the service life of storage batteries.
Description
Technical field
The invention belongs to field of solar thermal power generation, relate to a kind of batteries modularization photovoltaic charge control system and control method thereof.
Background technology
In energy crisis and environmental pollution serious day by day today, photovoltaic power generation technology has huge development potentiality, and the photovoltaic generating system that design function is good is the emphasis of various countries' active research.In photovoltaic generating system, the most frequently used energy storage device during storage battery.Good photovoltaic generating system can not only improve charge efficiency, and can prolong the useful life of storage battery.
Summary of the invention
The objective of the invention is in order to propose a kind of batteries modularization photovoltaic charge control system and control method thereof, this system and method can improve the charge efficiency of storage battery, and the protection storage battery, prolongs the useful life of storage battery.
A kind of batteries modularization photovoltaic charge control system comprises N charge control module, a N solar array, batteries and administration module;
Connect by the CAN bus successively between administration module, the N charge control module, carry out information interaction by the CAN bus, each solar array is charge control module of corresponding connection respectively, and each charge control module all connects batteries.
A kind of batteries modularization photovoltaic charge control method, specific embodiments is:
A, charge control module regularly send the charging status information of self, the charging status information of each charge control module of management module records to administration module;
The accumulator battery voltage that b, administration module obtain according to sampling is set the charging target voltage, is specially:
When accumulator battery voltage was lower than low pressure off voltage situation, setting the charging target was equalizing voltage, enters the equalizing charge stage;
Otherwise when accumulator battery voltage was lower than lifting recovery voltage situation, setting the charging target was booster tension, entered and promoted the charging stage;
Otherwise setting the charging target voltage is float charge voltage, enters the floating charge stage;
C, do not reach charging during target voltage when accumulator battery voltage, administration module specified time interval at interval sends order, make one not the charge control module of charging open charge switch begin the charging, up to accumulator battery voltage reach the charging target voltage 95% or all charge control module all charging;
D, when accumulator battery voltage reach the charging target voltage 95% after, the administration module fixed cycle sends order and regulates the charging duty ratio of a charge control module charge switch in one-period, makes accumulator battery voltage maintain target voltage.
The invention has the advantages that:
(1) by the number of increase and decrease charge control module, the present invention can adapt to the batteries of different capabilities, both can be used as the control system in large-sized solar power station, can be applied to small-sized photovoltaic generating system again;
(2) in independent photovoltaic generating system, when batteries was full of, floating charge one was to prevent the storage battery self discharge, the 2nd, can increase depth of charge; When batteries took place to put, suitable equalizing charge can be stirred electrolyte, caused the depolarising reaction of battery terminal, thereby made battery-operated in optimum state, effectively prolonged its useful life;
(3) the present invention monitors battery tension in real time by administration module; dynamically adjust charged state and the charging duty ratio of charging module, improved charge efficiency, and kept the steady of accumulator battery voltage; prevent that batteries from overcharging or overdischarge, effectively protected batteries.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of administration module of the present invention;
Fig. 3 is the structural representation of charge control module of the present invention.
Among the figure:
1-charge control module 2-solar array 3-batteries 4-administration module
The 5-CAN bus
101-sampling unit A 102-CAN communication unit A 103-charging control unit A
401-sampling unit 402-CAN communication unit 403-Charge Management unit
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is a kind of batteries modularization photovoltaic charge control system, as shown in Figure 1, comprises N charge control module 1, a N solar array 2, batteries 3 and administration module 4.
Connect by CAN bus 5 successively between administration module 4, the N charge control module 1, carry out information interaction by CAN bus 5, each solar array 2 is charge control module 1 of corresponding connection respectively, and each charge control module 1 all connects batteries 3.
Described N is the integer more than or equal to 1.
Described administration module 4 comprises sampling unit 401, CAN communication unit 402 and Charge Management unit 403.Described sampling unit 401 is used for gathering voltage, ambient temperature and the humidity of batteries 3; Described CAN communication unit 402 is used for communicating between administration module 4 and the charge control module 1, is used for sending charging controlling command to charge control module 1, receives the charging status information of charge control module 1.Charge Management unit 403 sends charging controlling command to each charge control module 1, and charge control module 1 is charged according to 2 pairs of batteries 3 of order N solar array of control.
Described Charge Management unit 403 is according to the voltage of the batteries 3 of sampling unit 401 collections, set the target charging voltage of batteries 3, and, Charge Management unit 403 charges to batteries 3 according to the difference of current batteries 3 voltages and target charging voltage, the charging status information of batteries 3, voltage, solar array 2 voltages and the charging current control charge control module 1 of batteries 3.
Physical layer and the data link layer of described CAN bus communication network are followed the CAN2.0A protocol specification, application layer protocol is custom protocol, redefined the identifier of CAN bus data frame, the information such as sequence number that comprised this frame in Frame source address, destination address and the packet, first byte of transmitting in the Frame is the command byte item.
A kind of batteries modularization photovoltaic charge control method, specific embodiments is:
A, charge control module 1 regularly send the charging status information of self, the charging status information of administration module 4 each charge control module 1 of record to administration module 4;
When batteries 3 voltages were lower than low pressure off voltage situation, setting the charging target was equalizing voltage, enters the equalizing charge stage;
Otherwise when accumulator battery voltage was lower than lifting recovery voltage situation, setting the charging target was booster tension, entered and promoted the charging stage;
Otherwise setting the charging target voltage is float charge voltage, enters the floating charge stage.
C, do not reach charging during target voltage when batteries 3 voltages, administration module 4 specified time interval at interval sends order, make one not the charge control module 1 of charging open charge switch begin the charging, up to batteries 3 voltages reach the charging target voltage 95% or all charge control module 1 all charging;
D, when batteries 3 voltages reach the charging target voltage 95% after, administration module 4 fixed cycles send the charging duty ratio of charge switch in one-period that a charge control module 1 is regulated in order, make batteries 3 voltages maintain target voltage.
Concrete control method is:
Administration module 4 is readjusted the charging duty ratio every 100ms;
When batteries 3 voltages are lower than the charging target voltage, send order and make the charging duty ratio of a charging module 1 increase by 1%;
When batteries 3 voltages are higher than the charging target voltage, send order and make the charging duty ratio of a charging module 1 reduce 1%.
Claims (3)
1. a batteries modularization photovoltaic charge control system is characterized in that, comprises N charge control module, a N solar array, batteries and administration module;
Connect by the CAN bus successively between administration module, the N charge control module, carry out information interaction by the CAN bus, each solar array is charge control module of corresponding connection respectively, and each charge control module all connects batteries;
Described administration module comprises sampling unit, CAN communication unit and Charge Management unit; Described sampling unit is used for gathering voltage, ambient temperature and the humidity of batteries; Described CAN communication unit is used for communicating between administration module and the charge control module, is used for sending charging controlling command to charge control module, receives the charging status information of charge control module; The Charge Management unit sends charging controlling command to each charge control module, and each charge control module is charged to batteries according to the solar array that order control is connected with self;
Wherein, N is the integer greater than 1;
Wherein, when accumulator battery voltage does not reach the charging target voltage, administration module specified time interval at interval sends order, make one not the charge control module of charging open charge switch begin the charging, up to accumulator battery voltage reach the charging target voltage 95% or all charge control module all charging.
2. a kind of batteries modularization photovoltaic charge control system according to claim 1, it is characterized in that, described Charge Management unit is according to the voltage of the batteries of sampling unit collection, the target charging voltage of automatic setting batteries, and, the Charge Management unit sends order control charge control module according to the difference of current accumulator battery voltage and target charging voltage, the charging status information of batteries, voltage, solar array voltage and the charging current of batteries, and batteries is charged.
3. a kind of batteries modularization photovoltaic charge control system according to claim 1 is characterized in that described charge control module comprises sampling unit A, CAN communication unit A, charging control unit A; Described sampling unit A is used for gathering accumulator battery voltage, charging current; Described CAN communication unit A is used for carrying out communication with administration module, the charging controlling command of receiving management module and send self charging status information to administration module; Charge switch of described charging control unit A control, when charge switch was closed, solar array began the charging of accumulators group; When charge switch disconnected, solar array stopped the charging of accumulators group; Charge control module A opens or closes charge switch according to the order of administration module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102369981A CN102290844B (en) | 2011-08-18 | 2011-08-18 | Modularized photovoltaic charge control system of storage battery pack and control method thereof |
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| CN2011102369981A CN102290844B (en) | 2011-08-18 | 2011-08-18 | Modularized photovoltaic charge control system of storage battery pack and control method thereof |
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| CN102290844A CN102290844A (en) | 2011-12-21 |
| CN102290844B true CN102290844B (en) | 2013-09-18 |
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| CN105207298B (en) * | 2015-10-10 | 2017-03-15 | 西安特锐德智能充电科技有限公司 | A kind of flexible packet current equalizing method of the charger system of shared bus |
| CN106684939B (en) * | 2015-11-05 | 2019-06-11 | 北京汇能精电科技股份有限公司 | Photovoltaic charged control system and control method |
| CN107069897B (en) * | 2017-06-09 | 2023-11-21 | 上海历挚机电设备有限公司 | Photovoltaic power station management system and method |
| CN109378895B (en) * | 2018-12-18 | 2021-01-12 | 北京汇能精电科技股份有限公司 | Control method, device and system of solar controller |
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| JP2007288932A (en) * | 2006-04-18 | 2007-11-01 | Aichi Electric Co Ltd | Charge control device of photovoltaic power generation facility |
| US20080094024A1 (en) * | 2006-10-23 | 2008-04-24 | Hung-Mau Li | Power Supply Circuit of Dual Purpose Chargeable Accumulator |
| CN201018313Y (en) * | 2007-01-25 | 2008-02-06 | 上海御能动力科技有限公司 | Domestic solar energy power supply system |
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