CN202260506U - Storage battery charging and discharging on-line detection and control system in photovoltaic system - Google Patents
Storage battery charging and discharging on-line detection and control system in photovoltaic system Download PDFInfo
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- CN202260506U CN202260506U CN2011203243596U CN201120324359U CN202260506U CN 202260506 U CN202260506 U CN 202260506U CN 2011203243596 U CN2011203243596 U CN 2011203243596U CN 201120324359 U CN201120324359 U CN 201120324359U CN 202260506 U CN202260506 U CN 202260506U
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- storage battery
- charging
- discharging
- line detection
- control system
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Abstract
The utility model relates to a storage battery charging and discharging on-line detection and control system in a photovoltaic system. The storage battery charging and discharging on-line detection and control system includes an exchanger which is connected with a photovoltaic battery, a storage battery which is connected with a charging output terminal of the exchanger, a comparator which is connected with a terminal voltage output terminal of the storage battery via a voltage division circuit, and a controller which is connected with an output terminal of the comparator and is used to control the charging and discharging of the storage battery. A charging and discharging control signal output terminal of the controller is connected with a control signal input terminal of the exchanger. The storage battery charging and discharging on-line detection and control system adopts the voltage single-loop on-line detection scheme. The on-line detection means that the terminal voltage of the storage battery is monitored continuously in the charging process, and when the terminal voltage of the storage battery is bigger than a limit value, the storage battery is regarded as fully charged, and a solar battery is kept from charging the storage battery.
Description
Technical field
The utility model relates to the online detection of accumulator cell charging and discharging, the control system in a kind of photovoltaic system.
Background technology
The condition of work of the storage battery in the solar power system is different in the condition of work of other occasions with storage battery; Its charge rate and discharge rate are all very little; And the charging interval is restricted, and promptly only when sunshine, could charge, so can not charge to it by a fixing charging rule.Because battery applications under this special environment, causes its life-span to compare the weak point of being scheduled to, and becomes the most flimsy part in the whole photovoltaic system, the reason of its damage is mainly " overcharging " and " cross and put ".
Accumulator super-charge is meant that its cell tension surpasses certain level and is generally the single lattice of 2.35-2.40V/, and the oxygen that this moment, storage battery can't make generation is chemical combination fully again.Charging voltage is too high, and the hydrogen that on negative pole, generates is difficult in inside battery and is absorbed, and in battery, produces pressure and causes moisture loss because of accumulation.When seriously overcharging, water decomposition produces hydrogen and oxygen, makes that other places of concentration ratio, storage battery bottom are high, causes negative plate bottom sulfation, and positive plate corrosion and expansion cause capacitance loss.
Storage battery is crossed to put and is meant that its discharge has surpassed the final discharging voltage of regulation, and storage battery has been emitted excessive capacity.In lead acid accumulator, two electrode pairs are crossed and put all is responsive.In dissolving again sedimentation mechanism, when plumbous and brown lead oxide is dissolved in the electrolyte respectively and when being precipitated out as new compound lead sulfate, original structure has taken place to change completely and lose active material.Negative electrode also is responsive because the danger of antipole is arranged to putting excessively.Swelling agent in the active material may be ineffective because of oxidation, and the lead acid accumulator danger meeting that dendrite increases when recharging subsequently increases greatly.
Therefore, in actual charge and discharge process, needing real-time capacity to storage battery to detect to judge whether continuing charge or discharge, to guarantee the useful life of storage battery, is the technical barrier of this area.
The utility model content
The technical problem that the utility model will solve provides the online detection of accumulator cell charging and discharging, the control system in the photovoltaic system in a kind of simple in structure, useful life of being suitable for guaranteeing storage battery.
In order to solve the problems of the technologies described above; The utility model provides the online detection of the accumulator cell charging and discharging in a kind of photovoltaic system, control system, and it comprises: the interchanger that links to each other with photovoltaic cell, the storage battery that links to each other with the charging output of interchanger, the comparator that links to each other with the terminal voltage output of this storage battery through bleeder circuit, the controller that is used to control said accumulator cell charging and discharging that links to each other with the output of this comparator; The control signal output ends that discharges and recharges of this controller links to each other with the signal input end of interchanger.
The technique scheme of the utility model is compared prior art and had the following advantages: the utility model has adopted the online detection scheme of voltage monocycle; Online detection; Promptly in charging process, constantly the terminal voltage of storage battery is monitored; When the terminal voltage of storage battery during greater than certain limit value, just be regarded as being full of, stop solar cell to charge in batteries.The terminal voltage VD of storage battery is input comparator after dividing potential drop respectively; When VD＜8V, comparator is triggered, solar cell through the counnter attack diode to charge in batteries; When VD＞15V, stop charging.Threshold voltage can be set, and used 8V and 15V are the experience income value.The circuit structure that the utility model adopts is simple, and cost is low, and is easy to safeguard.
Description of drawings
For the content that makes the utility model is more clearly understood, below basis specific embodiment and combine accompanying drawing, the utility model is done further detailed explanation, wherein
Fig. 1 is the circuit knot block diagram of the online detection of the accumulator cell charging and discharging in the photovoltaic system among the embodiment, control system.
Embodiment
See Fig. 1; The online detection of accumulator cell charging and discharging in the photovoltaic system of present embodiment, control system comprise: the interchanger that links to each other with photovoltaic cell, the storage battery that links to each other with the charging output of this interchanger, the comparator that links to each other with the terminal voltage output of this storage battery through bleeder circuit, the controller that is used to control said accumulator cell charging and discharging that links to each other with the output of this comparator; The control signal output ends that discharges and recharges of this controller links to each other with the signal input end of interchanger.
Said controller is a single-chip microcomputer, and said interchanger is a relay.
Obviously, the foregoing description only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these spirit that belong to the utility model are extended out or change still are among the protection range of the utility model.
Claims (1)
1. the online detection of accumulator cell charging and discharging, the control system in the photovoltaic system, its this be characterised in that and comprise: the interchanger that links to each other with photovoltaic cell, the storage battery that links to each other with the charging output of this interchanger, the comparator that links to each other with the terminal voltage output of this storage battery through bleeder circuit, the controller that is used to control said accumulator cell charging and discharging that links to each other with the output of this comparator;
The control signal output ends that discharges and recharges of this controller links to each other with the signal input end of interchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203243596U CN202260506U (en) | 2011-08-31 | 2011-08-31 | Storage battery charging and discharging on-line detection and control system in photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203243596U CN202260506U (en) | 2011-08-31 | 2011-08-31 | Storage battery charging and discharging on-line detection and control system in photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202260506U true CN202260506U (en) | 2012-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203243596U Expired - Fee Related CN202260506U (en) | 2011-08-31 | 2011-08-31 | Storage battery charging and discharging on-line detection and control system in photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202260506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788959A (en) * | 2012-08-31 | 2012-11-21 | 长沙理工大学 | Method for detecting charge-discharge state of storage battery of stand-alone photovoltaic power generation system |
-
2011
- 2011-08-31 CN CN2011203243596U patent/CN202260506U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788959A (en) * | 2012-08-31 | 2012-11-21 | 长沙理工大学 | Method for detecting charge-discharge state of storage battery of stand-alone photovoltaic power generation system |
| CN102788959B (en) * | 2012-08-31 | 2014-12-03 | 长沙理工大学 | Method for detecting charge-discharge state of storage battery of stand-alone photovoltaic power generation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20120831 |