CN104734228A - Solar panel measuring circuit of solar charge controller of common positive pole structure - Google Patents
Solar panel measuring circuit of solar charge controller of common positive pole structure Download PDFInfo
- Publication number
- CN104734228A CN104734228A CN201310702199.8A CN201310702199A CN104734228A CN 104734228 A CN104734228 A CN 104734228A CN 201310702199 A CN201310702199 A CN 201310702199A CN 104734228 A CN104734228 A CN 104734228A
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- storage battery
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- 238000005070 sampling Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims 6
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a solar panel measuring circuit of a solar charge controller of a common positive pole structure. The solar panel measuring circuit is used for measuring an open-circuit voltage and a charge current of the solar panel. The scheme for measuring the open-circuit voltage of the solar panel comprises the steps that a precision divider resistor is used for processing a voltage value of a storage battery and a voltage difference value between the storage battery and the solar panel, operation processing is conducted on the voltage difference value through an in-phase summator, and finally operation processing is conducted through a single chip microcomputer. The scheme for measuring the charge current of the solar panel comprises the steps that a current sampling resistor is arranged on a positive pole main circuit of the solar charge controller in series, amplification is conducted on the voltage of the sampling resistor through a proportional amplifier, and finally operation processing is conducted through the single chip microcomputer. Accordingly, by means of the circuit design, the solar charge controller of the common positive pole structure can measure the open-circuit voltage and the charge current of the solar panel precisely, and the functions of the solar charge controller are more complete.
Description
Technical field
The present invention relates to solar recharging control technology, specifically a kind of cell panel measuring circuit of anode structure solar charging controller altogether.
Background technology
Solar charging controller is used for solar panel to the charging whole-process control of storage battery, and major function storage battery is carried out to the control of over-charge protective and charging modes.Current existing solar charging controller great majority adopt a kind of charging control program of anode structure, be exactly specifically that cell panel positive pole is directly connected with the positive pole of storage battery, the negative pole circuit of cell panel negative pole and storage battery arranges two N-channel MOS FET switch pipes, adopt single-chip microcomputer to be controlled the break-make of two switching tubes by power driving circuit, reach the object that charging controls.Although this scheme effectively can realize accumulator super-charge protection; and support directly to fill mode; but due to cell panel and storage battery not altogether, utilize the inner A/D of single-chip microcomputer can only measure the voltage difference of storage battery and cell panel, directly do not detect the open circuit voltage of solar panel.Thus causing the duty ratio of the pwm pulse in PWM charge mode accurately not determine, the energy output of cell panel also not easily obtains simultaneously, is unfavorable for the Function Extension of solar charging controller.
Summary of the invention
The present invention is in order to solve this technological deficiency of open circuit voltage not easily measuring solar panel in common anode structure solar charging controller, a kind of cell panel measuring circuit of anode structure solar charging controller is altogether provided, first measure the indirect inspection cell plate voltage that pressure difference and battery tension value carry out processing again, can also measure cell panel charging current simultaneously.
The present invention includes common anode structure solar charging controller circuit, battery voltage measuring circuit, storage battery and cell plate voltage difference measuring circuit, voltage difference treatment circuit and charging current measuring circuit.The technical scheme adopted is: anode structure solar charging controller circuit has two main lines road to be respectively positive pole main line and negative pole main line altogether.Solar panel positive pole is directly connected with battery positive voltage by a fuse on positive pole main line string, solar panel negative pole is connected with battery terminal negative by two N-channel MOS FET switch pipes on negative pole main line string, and two N-channel MOS FET switch pipes adopt single-chip processor i/o mouth to carry out switch control rule by two power driving circuits.
Described battery voltage measuring circuit is made up of a current-limiting resistance, two accurate divider resistances and individual anti-interference filtration electric capacity.Two accurate divider resistance two ends connect the both positive and negative polarity of storage battery respectively, and current-limiting resistance one end connects the A/D pin of single-chip microcomputer, the intermediate ends of another termination two accurate divider resistances.The effect of two precision resistance dividing potential drops is converted in the range ability of Chip Microcomputer A/D transducer by the magnitude of voltage of storage battery.
Described storage battery and cell plate voltage difference measuring circuit are made up of a current-limiting resistance, two accurate divider resistances and an anti-interference filtration electric capacity.Current-limiting resistance one termination positive pole main line, the other end connects with accurate divider resistance, also arrange the middle that a wire is connected to two switching tubes in addition, the intermediate ends of accurate divider resistance is connected with electric capacity one end, and divider resistance is connected with negative pole main line with the other end of electric capacity.Adopt Single-chip Controlling first switching tube conducting when measuring pressure difference, when second switching tube is closed, hold is same current potential the link of current-limiting resistance and accurate divider resistance and cell panel, and the accurate divider resistance other end be storage battery hold.Such pressure reduction is just added in two accurate divider resistance two ends.The effect of two precision resistance dividing potential drops is converted in the range ability of Chip Microcomputer A/D transducer by the pressure difference of cell panel and storage battery.
Described voltage difference treatment circuit adopts integrated operational amplifier to form voltage adder circuit.Because the voltage of cell panel is by day higher than the voltage of storage battery, voltage difference is negative value, and the scope of Chip Microcomputer A/D transducer process magnitude of voltage is generally at 0-5V, therefore amplifier add circuit is adopted negative pressure difference to be added a fixing voltage DC component, make it become a malleation difference, then give Chip Microcomputer A/D process.
First described charging current measuring circuit goes here and there a current sampling resistor on positive pole main line, when solar panel is to charge in batteries, positive pole main line has charging current on current sampling resistor, forms very little voltage drop, this small voltage signal gives Chip Microcomputer A/D process by the voltage amplifier circuit that operational amplifier is formed.
The present invention, owing to adopting above-mentioned so a kind of circuit design, makes the solar charging controller of common anode structure can accurately measure open circuit voltage and the charging current of solar panel, makes solar charging controller function more perfect.The measurement sample circuit simultaneously provided all is formed with basic components and parts and General operational amplifier chip, and structure is simple, cheap and reliable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the present invention's cathode circuit structure chart altogether.
Fig. 2 is storage battery and cell plate voltage difference treatment circuit figure
Fig. 3 is voltage signal amplification circuit diagram
In figure: 100, battery voltage measuring circuit, 200, storage battery and cell plate voltage difference measuring circuit, 300, charging current measuring circuit, 1, solar panel, 2, storage battery, 3, single-chip microcomputer, 4, voltage difference treatment circuit, 5, voltage signal amplifying circuit, 6, positive pole main line, 7, negative pole main line, 8, power driving circuit, 9, N-channel MOS FET switch pipe, 10, current sampling resistor, 11, current-limiting resistance, 12, fuse, 13, accurate divider resistance, 14, electric capacity, 15, wire, 16, two-way Xiao Jite diode.
Embodiment
As shown in Figure 1: the present invention is made up of single-chip microcomputer 3, battery voltage measuring circuit 100, storage battery and cell plate voltage difference measuring circuit 200, voltage difference treatment circuit 4 and charging current measuring circuit 300.The technical scheme adopted is: solar panel 1 positive pole is gone here and there a upper fuse 12 by positive pole main line 6 and is connected with storage battery 2 positive pole, solar panel 1 negative pole is gone here and there upper two N-channel MOS FET switch pipes 9 by negative pole main line 7 and is connected with storage battery 2 negative pole, and single-chip microcomputer 3 two I/O mouths control the break-make of two N-channel MOS FET switch pipes 9 by two power driving circuits 8.
Described battery voltage measuring circuit 100 is made up of current-limiting resistance 11, two accurate divider resistances 13 and anti-interference filtration electric capacity 14.Two accurate divider resistance 13 two ends connect the both positive and negative polarity of storage battery 2 respectively, and current-limiting resistance 11 one end connects the A/D pin of single-chip microcomputer 3, and the other end is connected to the intermediate ends of two accurate divider resistances 13.Anti-interference filtration electric capacity 14 1 end is connected to the intermediate ends of two accurate divider resistances 13, and the other end is connected with the negative pole of storage battery 2.
Described storage battery and cell plate voltage difference measuring circuit 200 are made up of current-limiting resistance 11, two accurate divider resistances 13 and anti-interference filtration electric capacity 14.Current-limiting resistance 11 1 termination positive pole main line, the other end connects with accurate divider resistance 13, the middle that a wire 15 is connected to two N-channel MOS FET switch pipes 9 is also set in addition, the intermediate ends of two accurate divider resistances 13 is connected with anti-interference filtration capacitance 14 one end, and two accurate divider resistances 13 are connected with negative pole main line 7 with the other end of anti-interference filtration electric capacity 14.
As shown in Figure 2: the input of described voltage difference treatment circuit 4 is connected with the output BSC of voltage difference measuring circuit 200, output is connected with the A/D pin of single-chip microcomputer, comprises a slice operational amplifier integrated chip U1, six resistance and a controllable accurate source of stable pressure chip Q1.Wherein U1, R1, R2, R3, R4, R5 and R6 constitute homophase adder operation circuit.Q1 and R6 constitutes the reference power supply of a 2.5V.In the present embodiment, the Low-offset voltage operational amplifier of to be model the be OP07 that operational amplifier adopts, the source of stable pressure chip of what controllable accurate source of stable pressure chip adopted is model to be TL431 reference voltage be 2.5V.The resistance value of R1, R2, R3 and R5 is set to 10K, and the resistance value of R4 is set to 20K.By above setting, the voltage that the voltage of U1 output just equals BSC end adds+2.5V.
Described charging current measuring circuit 300 comprises the current sampling resistor 10 of string on positive pole main line and voltage signal amplifying circuit 5, as shown in Figure 3: described voltage signal amplifying circuit 5 comprises a slice operational amplifier integrated chip U2, four resistance and a filter capacitor C1.Four resistance R8, R9, R10 and R11 and amplifier chip U2 constitute in-phase proportion amplifying circuit.The Low-offset voltage operational amplifier of to be model be OP07 that adopts of operational amplifier in the present embodiment, the resistance value of R8, R9 is set to 10K, and the resistance value of R10, R11 is set to 200K.To be arranged by so a kind of, voltage signal amplifying circuit 16 20 times by the voltage amplification on current sampling resistor R7.
Designed by foregoing circuit, the present invention to the operation principle that the open circuit voltage of solar panel is measured is: first the voltage at storage battery two ends measured by single-chip microcomputer 3 by its inner A/D converter and battery voltage measuring circuit 100; Then, single-chip microcomputer 3 makes N-channel MOS FET switch pipe A conducting by power driving circuit A, by power driving circuit B, N-channel MOS FET switch pipe B is disconnected, same current potential is held on the upper end of so accurate divider resistance 12 and the ground of solar panel 1, lower end is connected with storage battery 2 ground end, and the positive terminal of solar panel 1 and storage battery 2 is also same current potential, now the voltage difference of solar panel 1 and storage battery 2 is just added in the two ends of accurate divider resistance 12.Due to by day, the voltage of the voltage ratio storage battery 2 of solar panel 1 is high, and time at night with solar radiation deficiency, the voltage of the voltage ratio storage battery 2 of solar panel 1 is low, voltage daytime of just causing accurate divider resistance 12 two ends is negative value, and be positive voltage value in the evening.And the inner A/D of single-chip microcomputer can only process positive voltage signal.So the present invention is just provided with a voltage difference treatment circuit 4 negative value is added a positive reference voltage, give the inside A/D process of single-chip microcomputer 3 after negative value being converted to positive voltage value, single-chip microcomputer 3 draws the voltage difference of solar panel 1 and storage battery 2 after process computing.Last single-chip microcomputer draws the open circuit voltage of solar panel by computing when recording voltage and the voltage difference of storage battery 2.
The present invention to the operation principle that the charging current of solar panel is measured is: the current sampling resistor 10 that a resistance of going here and there on positive pole main line 6 is very little, when there being charging current, a small voltage drop signal can be formed at current sampling resistor 10 two ends, the A/D converter giving single-chip microcomputer 3 inside after being amplified small voltage drop signal by voltage amplifier circuit is processed, and single-chip microcomputer 3 draws the size of solar panel charging current by computing.
Claims (4)
1. one kind is total to the cell panel measuring circuit of anode structure solar charging controller, comprise solar panel (1) and storage battery (2), it is characterized in that: solar panel (1) positive pole main line (6) series winding current sampling resistor (10) is connected with storage battery (2) positive pole, negative pole main line (7) series winding two N-channel MOS FET switch pipes (9) connect storage battery (2) negative pole, two switching tubes (9) that negative pole main line (7) is contacted are connected with the I/O pin of single-chip microcomputer (3) respectively by wire (15) series winding power driving circuit (8), a current-limiting resistance (11) and two accurate divider resistances (13) are connected with by wire (15) between positive pole main line (6) and negative pole main line (7), an A/D pin of single-chip microcomputer (3) is connected with the two ends of current sampling resistor (10) afterwards by wire (15) series winding voltage signal amplifying circuit (5), another A/D pin of single-chip microcomputer (3) is connected on the wire (15) of the centre of two accurate divider resistances (13) between positive pole main line (6) and negative pole main line (7) by wire (15) series connected battery and cell plate voltage difference treatment circuit (4), be provided with wire (15) series winding two accurate divider resistances (13) at the positive terminal of storage battery (2) to be connected with storage battery (2) negative pole end, the mid line of two accurate divider resistances (13) is provided with wire (15) and a current-limiting resistance (11) of contacting is connected with an A/D pin of single-chip microcomputer (3) afterwards.
2. the cell panel measuring circuit of anode structure solar charging controller altogether according to claim 1, is characterized in that: on two accurate divider resistance (13) mid lines, be provided with wire (15) series winding electric capacity (14) be connected with negative pole main line (7).
3. the cell panel measuring circuit of altogether anode structure solar charging controller according to claim 1, is characterized in that: between the current-limiting resistance (11) and accurate divider resistance (13) of positive pole main line (6) and the connected wire (15) of negative pole main line (7), be provided with wire (15) be connected between two switching tubes (9) of negative pole main line (7).
4. the cell panel measuring circuit of anode structure solar charging controller altogether according to claim 1, is characterized in that: the upper string of positive pole main line (6) be connected with storage battery (2) at solar panel (1) has a fuse (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310702199.8A CN104734228A (en) | 2013-12-19 | 2013-12-19 | Solar panel measuring circuit of solar charge controller of common positive pole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310702199.8A CN104734228A (en) | 2013-12-19 | 2013-12-19 | Solar panel measuring circuit of solar charge controller of common positive pole structure |
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| Publication Number | Publication Date |
|---|---|
| CN104734228A true CN104734228A (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310702199.8A Pending CN104734228A (en) | 2013-12-19 | 2013-12-19 | Solar panel measuring circuit of solar charge controller of common positive pole structure |
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| CN (1) | CN104734228A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788253A (en) * | 2017-01-19 | 2017-05-31 | 青海大学 | A kind of photovoltaic module voltage, current measure device |
| CN109091883A (en) * | 2018-09-04 | 2018-12-28 | 佛山科学技术学院 | A kind of model car that band is solar powered |
| CN109120023A (en) * | 2017-06-26 | 2019-01-01 | 东莞新能德科技有限公司 | A kind of compensation method of charging voltage, device, battery and terminal device |
| CN109107173A (en) * | 2018-09-04 | 2019-01-01 | 佛山科学技术学院 | A kind of allpurpose model trolley |
| CN109358246A (en) * | 2018-10-19 | 2019-02-19 | 福建和盛高科技产业有限公司 | A kind of solar charging power detection circuit and detection method based on common-anode charger |
| CN109870656A (en) * | 2019-02-20 | 2019-06-11 | 华北电力大学 | A kind of battery parameter detection system |
| CN114554653A (en) * | 2020-11-24 | 2022-05-27 | 深圳市法马新智能设备有限公司 | Solar traffic indicator lamp |
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2013
- 2013-12-19 CN CN201310702199.8A patent/CN104734228A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788253A (en) * | 2017-01-19 | 2017-05-31 | 青海大学 | A kind of photovoltaic module voltage, current measure device |
| CN106788253B (en) * | 2017-01-19 | 2019-04-05 | 青海大学 | A kind of photovoltaic module voltage, current measure device |
| CN109120023A (en) * | 2017-06-26 | 2019-01-01 | 东莞新能德科技有限公司 | A kind of compensation method of charging voltage, device, battery and terminal device |
| CN109091883A (en) * | 2018-09-04 | 2018-12-28 | 佛山科学技术学院 | A kind of model car that band is solar powered |
| CN109107173A (en) * | 2018-09-04 | 2019-01-01 | 佛山科学技术学院 | A kind of allpurpose model trolley |
| CN109358246A (en) * | 2018-10-19 | 2019-02-19 | 福建和盛高科技产业有限公司 | A kind of solar charging power detection circuit and detection method based on common-anode charger |
| CN109358246B (en) * | 2018-10-19 | 2020-11-17 | 福建和盛高科技产业有限公司 | Solar charging detection circuit and detection method based on common anode charger |
| CN109870656A (en) * | 2019-02-20 | 2019-06-11 | 华北电力大学 | A kind of battery parameter detection system |
| CN114554653A (en) * | 2020-11-24 | 2022-05-27 | 深圳市法马新智能设备有限公司 | Solar traffic indicator lamp |
| CN114554653B (en) * | 2020-11-24 | 2023-12-26 | 深圳市法马新智能设备有限公司 | Solar traffic indicator lamp |
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Application publication date: 20150624 |
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