CN204131167U - A kind of photovoltaic generation smart charger circuit signal detection system - Google Patents
A kind of photovoltaic generation smart charger circuit signal detection system Download PDFInfo
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- CN204131167U CN204131167U CN201420524879.5U CN201420524879U CN204131167U CN 204131167 U CN204131167 U CN 204131167U CN 201420524879 U CN201420524879 U CN 201420524879U CN 204131167 U CN204131167 U CN 204131167U
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- circuit
- signal
- voltage
- charging
- hall element
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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 utility model discloses a kind of photovoltaic generation smart charger circuit signal detection system, this system comprises signal acquiring system, Hall element, level adjustment circuit, filter circuit and single-chip microcomputer, DC charging signal in system collects process by signal acquiring system, be transported to Hall element, after Hall element detects, carry out level adjustment circuit adjustment, circuit just can send into the analog input pin of single-chip microcomputer after filtering again, be transferred in DSP and process, rely on the cooperation of software algorithm and hardware circuit, complete the efficient charging to system.What the utility model charging load input voltage, current detection circuit mainly used is the sample circuit composition that Hall element and discharge circuit are formed; for the protection of the input variable of the voltage and current inputted with sample battery, ensure storage battery can normally, safe, complete charging fast.
Description
Technical field
The utility model relates to intelligent charge technique field, specifically belongs to a kind of photovoltaic generation smart charger circuit signal detection system.
Background technology
The selection of charging modes directly affects service efficiency and the useful life of battery, charging technique development in recent years is very fast, the development experience of charge control system three phases: one, current limiting pressure-limiting formula charging system, limited pressure charging that the most original is exactly, is then transitioned into the charging of current limiting pressure-limiting formula, and the mode that its uses is exactly shallowly fill shallow putting, the statement of its life-span is exactly the time, there is no number of times, such as 10 years, the weak effect of this charge mode; Two, constant current constant voltage formula charging system, this is the second stage of the development of charging system.First, control, to predetermined magnitude of voltage, then, to change constant voltage into and complete remaining charging with constant current charge.Changing voltage between general two benches is exactly the constant voltage of second stage.The charging current of this charging system always lower than battery can ability to accept, cause charge efficiency low, greatly reduce the useful life of battery; Three, adapt to Intelligent charging system, along with the appearance of large-scale integrated IC, charging device enters a brand-new self adaptation, intelligence stage, is namely called third generation charger.The charge rule that adaptive charger charging system follows all kinds of battery charges.Charging system has the Single-chip Controlling of special function, continuous sensed system parameter, pacifies certain algorithm and constantly adjusts charge parameter, same charger can adapt to the charging of variety classes battery, the output current of charging system self-adaptative adjustment oneself, without the need to artificial selection, avoids operate miss.For photovoltaic charging system, photovoltaic cell changes solar energy into electric energy, the electrical power storage changed out is got up by storage battery, charging controlling unit plays pivotal role in systems in which, it as required different condition select the charge mode of storage battery, thus the charging rate accelerating storage battery extends useful life of storage battery.Photovoltaic system input energy is surely unstable, and controlling unit has very important effect.Wherein electric current, voltage signal Quick Acquisition are detected, be ensure storage battery can normally, safe, complete charging basic guarantee fast.
Utility model content
The purpose of this utility model is to provide a kind of photovoltaic generation smart charger circuit signal detection system; what this system charging load input voltage, current detection circuit mainly used is the sample circuit composition that Hall element and discharge circuit are formed; for the protection of the input variable of the voltage and current inputted with sample battery, ensure storage battery can normally, safe, complete charging fast.
The technical solution adopted in the utility model is as follows:
A kind of photovoltaic generation smart charger circuit signal detection system, this system comprises signal acquiring system, Hall element, level adjustment circuit, filter circuit and single-chip microcomputer, DC charging signal in system collects process by signal acquiring system, be transported to Hall element, after Hall element detects, carry out level adjustment circuit adjustment, circuit just can send into the analog input pin of single-chip microcomputer after filtering again, be transferred in DSP and process, rely on the cooperation of software algorithm and hardware circuit, complete the efficient charging to system.
Described signal acquiring system is made up of direct voltage testing circuit, d. c. voltage signal Acquisition Circuit, current detection circuit, current signal Acquisition Circuit, IGBT temperature detection circuit.
Compared with the prior art, the beneficial effects of the utility model are as follows:
What the utility model charging load input voltage, current detection circuit mainly used is the sample circuit composition that Hall element and discharge circuit are formed, for the protection of the input variable of the voltage and current inputted with sample battery, ensure storage battery can normally, safe, complete charging fast; The detection of storage battery output voltage, electric current is then make use of Hall element, by the voltage and current signal gathered.Feedback is sent in SG3525, completes the task of maximal power tracing and constant current, constant voltage, thus the output duty cycle of control SG3525, reach the object of control IGBT (opening and closing), complete the charging tasks of the battery to different electric pressure.
Accompanying drawing explanation
Fig. 1 is the hardware detection FB(flow block) of the utility model analog signal;
Fig. 2 is signals collecting schematic diagram of the present utility model;
Fig. 3 is the utility model voltage sensor senses circuit;
Fig. 4 is the utility model current sensor testing circuit.
Embodiment
See accompanying drawing, a kind of photovoltaic generation smart charger circuit signal detection system, this system comprises signal acquiring system, Hall element, level adjustment circuit, filter circuit and single-chip microcomputer, DC charging signal in system collects process by signal acquiring system, be transported to Hall element, after Hall element detects, carry out level adjustment circuit adjustment, circuit just can send into the analog input pin of single-chip microcomputer after filtering again, be transferred in DSP and process, rely on the cooperation of software algorithm and hardware circuit, complete the efficient charging to system, described signal acquiring system is by direct voltage testing circuit, d. c. voltage signal Acquisition Circuit, current detection circuit, current signal Acquisition Circuit, IGBT temperature detection circuit is formed.What charging load input voltage, current detection circuit mainly used is the sample circuit composition that Hall element and discharge circuit are formed, for the protection of the input variable of the voltage and current inputted with sample battery, ensure storage battery can normally, safe, complete charging fast; The detection of storage battery output voltage, electric current is then make use of Hall element, by the voltage and current signal gathered.Feedback is sent in SG3525, completes the task of maximal power tracing and constant current, constant voltage, thus the output duty cycle of control SG3525, reach the object of control IGBT (opening and closing), complete the charging tasks of the battery to different electric pressure.For the detection of voltage signal, the Hall element adopted herein is TBV10/25A.Its some relevant parameters are as follows:
Former limit rated current I
pN: 10mA secondary rated current I
sN: 25mA
No-load voltage ratio K
n: 2500:1000 operating voltage V
c: ± 15V
Primary current measuring range I
pM: 0 ~ ± 14mA insulation voltage: 2.5kV
Wherein+the HT of TBV10/25A Hall voltage transducer is original edge voltage input with-HT end, is connected in parallel in surveyed circuit, and needs in loop, former limit, seal in power resistor R1, and voltage signal is transformed to current signal.+ ,-to hold as working sensor voltage input end, in design, working sensor voltage is ± 15V.M end is detection signal output, and it exports as current mode.
Because the analog channel of DSP is input as voltage signal, therefore must increase sampling resistor to the output signal of transducer and carry out voltage sample, and sampled voltage should within the scope of the reference voltage 0 ~ 5V of A/D conversion.Wherein R
mbe sampling resistor.Choose suitable R
mresistance can make sampled voltage at 0 ~ 5V.
Consider the impact of noise jamming, detect the direct current signal exported and also have to pass through RC low pass device or active low-pass filter filtering.
If RC filtering can increase the internal resistance of signal source, be unfavorable for A/D sampling below, therefore adopt voltage follower as active filter circuit to reduce the internal resistance of signal source in design.
In addition, because each analog signal input pin has the diode having clamping action up and down in sheet, if input voltage does not do any current-limiting protection measure beyond this scope, wafer damage or hardware deadlock can be made.Therefore general serial connection after a current-limiting resistance in signal input circuit is received on single-chip microcomputer pin again.
For the detection of current signal, the Hall element adopted herein is TCR current sensor.Its some relevant parameters are as follows:
Former limit rated current I
pN: 5A primary current measuring range I
p: 0 ~ ± 15A
Secondary rated current I
sN: 10mA no-load voltage ratio K
n: 4:1000
Operating voltage V
c: ± 15V
Sampling resistor R
m: built-in 400 Ω
Isolation voltage 50Hz 1min 5.0kV
DC bus passes current sensor, the signal that M holds output detections to arrive.+ ,-hold as the filtering of working sensor voltage input end and overcurrent protection detect with direct voltage.
The use angle of the design consideration temperature sensor of temperature detection can be divided into contact and contactless two kinds, the former allows temperature sensor directly contact with object under test, and the latter makes temperature sensor and to be measuredly leaves certain distance, detect the infrared ray of releasing from object under test, thus reach the object of thermometric.Running more is touch sensor, and wherein, what variations in temperature is converted to resistance variations is called thermal resistance sensor, and what variations in temperature is converted into thermoelectric potential change is called thermocouple sensor.
Thermal resistance sensor has that structure is simple, easily manufactured, temperature-measuring range is wide, thermal inertia is little, accuracy is high, output signal is convenient to the advantages such as teletransmission; And its use error mainly comes from the instrumental error etc. of the error of division, extension wire error, dynamic error and use.According to temperature-measuring range occasion, comprehensive pluses and minuses, we choose Pt-100 thermal resistance, its specific works principle is as follows: amplifier TL082 does positive electrode input by reference power supply 5V, the follower be made up of TL082 does the negative pole end input of 3U4A, two end signals compare, corresponding voltage can be produced, due to the voltage meeting variation with temperature of Pt100, resistance is changed, therefore the voltage at Pt100 two ends also can change, therefore the voltage inputted by 3U4B positive input terminal will change, but TL082 can change output voltage signal at any time according to the magnitude of voltage of different difference, therefore ensure that Pt100 is while resistance changes, ensure that voltage also changes thereupon, thus ensure the constant of electric current, such sampling platinum resistance can go out the change of voltage according to the reacting condition of resistance, thus in input amplifier AD620, the corresponding voltage signal of generation output provides in DSP and does signal transacting.And the voltage of platinum resistance maximum generation 100 DEG C time is 0.28V, the internal resistance of AD620 is 49.1K, therefore needs the resistance of external about 5K, ensures the gain amplifier of 10 times, output voltage is maintained in 0 ~ 3.3V.
Claims (2)
1. a photovoltaic generation smart charger circuit signal detection system, it is characterized in that: this system comprises signal acquiring system, Hall element, level adjustment circuit, filter circuit and single-chip microcomputer, DC charging signal in system collects process by signal acquiring system, be transported to Hall element, after Hall element detects, carry out level adjustment circuit adjustment, circuit just can send into the analog input pin of single-chip microcomputer after filtering again, be transferred in DSP and process, complete the efficient charging to system.
2. a kind of photovoltaic generation smart charger circuit signal detection system according to claim 1, is characterized in that: described signal acquiring system is made up of direct voltage testing circuit, d. c. voltage signal Acquisition Circuit, current detection circuit, current signal Acquisition Circuit, IGBT temperature detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420524879.5U CN204131167U (en) | 2014-09-09 | 2014-09-09 | A kind of photovoltaic generation smart charger circuit signal detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420524879.5U CN204131167U (en) | 2014-09-09 | 2014-09-09 | A kind of photovoltaic generation smart charger circuit signal detection system |
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| Publication Number | Publication Date |
|---|---|
| CN204131167U true CN204131167U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420524879.5U Expired - Fee Related CN204131167U (en) | 2014-09-09 | 2014-09-09 | A kind of photovoltaic generation smart charger circuit signal detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729814A (en) * | 2019-10-14 | 2020-01-24 | 武汉汉源既济电力有限公司 | Commercial roof photovoltaic and multi-energy complementary comprehensive networking management system |
-
2014
- 2014-09-09 CN CN201420524879.5U patent/CN204131167U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729814A (en) * | 2019-10-14 | 2020-01-24 | 武汉汉源既济电力有限公司 | Commercial roof photovoltaic and multi-energy complementary comprehensive networking management system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20150909 |
|
| EXPY | Termination of patent right or utility model |