CN202710712U - I-V characteristic adjusting and sampling device of solar cell - Google Patents
I-V characteristic adjusting and sampling device of solar cell Download PDFInfo
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- CN202710712U CN202710712U CN2012203603878U CN201220360387U CN202710712U CN 202710712 U CN202710712 U CN 202710712U CN 2012203603878 U CN2012203603878 U CN 2012203603878U CN 201220360387 U CN201220360387 U CN 201220360387U CN 202710712 U CN202710712 U CN 202710712U
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Abstract
The utility model provides an I-V characteristic adjusting and sampling device of a solar cell, wherein the I-V characteristic adjusting and sampling device comprises a load adjusting circuit, a current sampling circuit and a voltage sampling circuit; the solar cell is accessed in a manner of a four-wire system; positive and negative voltage signal lines are connected to the voltage sampling circuit; a positive current signal line is connected to the load adjusting circuit and the current sampling circuit in turn and then is connected to a negative current signal line; positive and negative ends of control signals are respectively connected to the load adjusting circuit and the current sampling circuit; due to the control signals, the load adjusting circuit is changed from open-circuiting to short-circuiting; the current sampling circuit samples load current of the collar cell and outputs current sampling signals; and the voltage sampling circuit samples terminal voltage of the solar cell and outputs voltage sampling signals. The I-V characteristic adjusting and sampling device of the solar cell disclosed by the utility model has the advantages of being simple and practical in circuit and high in cost performance and is applied to measuring low-power I-V characteristics; and I-V characteristic curves of the solar cell under different solar irradiance conditions can be obtained.
Description
Technical field
The utility model relates to the testing apparatus of solar cell, and specifically a kind of solar cell I-V characteristic is regulated and sampler.
Background technology
In the solar energy resources investigation, need to understand under the various solar irradiances of different setting angles, locality, the I-V family curve of dissimilar solar cell and actual power efficient, this just need to have a kind of device, can regulate in real time the load of solar cell, make load change from being shorted between the open circuit, and obtain the variation of its electric current and voltage, thereby obtain the I-V family curve.Present solar cell I-V characteristic curve tester, being confined to lab investigation uses, be used for the test of PV array, and in mostly belonging to, powerful testing apparatus, volume is large, complex structure, expensive, can not be fit to miniwatt, the batch application demand of solar energy resources investigation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of solar cell I-V characteristic to regulate and sampler, and this device obtains the I-V family curve of solar cell by simple circuit structure.
According to the technical scheme that the utility model provides, described solar cell I-V characteristic is regulated and sampler, comprising: load trim circuits, current sampling circuit, voltage sample circuit; Solar cell accesses in the mode of four-wire system, anode and negative terminal are respectively drawn 2 lines, be respectively positive terminal voltage signal line, negative terminal voltage signal wire, anode current signal line and negative terminal current signal line, wherein said positive terminal voltage signal line, negative terminal voltage signal wire are connected to voltage sample circuit, the anode current signal line is connected to load trim circuits, current sampling circuit successively, is connected to the negative terminal current signal line; The positive and negative terminal of control signal is connected respectively to load trim circuits and current sampling circuit, described control signal is a variable voltage, load trim circuits changes the load of solar cell under the effect of described control signal, solar cell terminal voltage and output current are changed; The size of described control signal makes load trim circuits change to short circuit from open circuit; Current sampling circuit is taken a sample to the load current of solar cell, and exporting a voltage signal proportional to electric current is current sampling signal; Voltage sample circuit is taken a sample to the terminal voltage of solar cell, and exporting a voltage signal proportional to terminal voltage is voltage sampling signal.
The current sampling signal of described current sampling circuit is exported in the mode of two-wire system.The voltage sampling signal of described voltage sample circuit is exported in the mode of two-wire system.
Described load trim circuits adopts a MOSFET device, and the MOSFET device drain connects the anode current signal line, and MOSFET device source electrode connects current sampling circuit, and the MOSFET device grids connects described control signal.
Described current sampling circuit adopts the first resistance, and positive and negative current sampling signal is exported respectively at the two ends of the first resistance.
Described voltage sample circuit comprises the second resistance and the 3rd resistance of serial connection, the order of connection is: positive terminal voltage signal line is connected to the second resistance, be connected to the 3rd resistance, be connected to the negative terminal voltage signal wire, positive and negative voltage sampling signal is exported respectively at the two ends of described the 3rd resistance.
The utility model has the advantages that: this device circuit is simple, practical, and cost performance is high, is suitable for low power I-V feature measurement.This device is regulated the load of solar cell, obtains solar cell from open circuit to the electric current of short circuit and the sampled signal of voltage, thereby can obtain the I-V family curve of solar cell under different solar irradiance conditions.
Description of drawings
Fig. 1 is electrical block diagram of the present utility model.
Fig. 2 is the utility model embodiment circuit theory diagrams.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, the utility model comprises: load trim circuits 1, current sampling circuit 2, voltage sample circuit 3; Solar cell 4 accesses in the mode of four-wire system, anode and negative terminal are respectively drawn 2 lines, be respectively positive terminal voltage signal line L1, negative terminal voltage signal wire L2, anode current signal line L3 and negative terminal current signal line L4, wherein said positive terminal voltage signal line L1, negative terminal voltage signal wire L2 are connected to voltage sample circuit 3, anode current signal line L3 is connected to load trim circuits 1, current sampling circuit 2 successively, is connected to negative terminal current signal line L4; Control signal is a variable voltage, the positive and negative terminal of described control signal is connected respectively to load trim circuits 1 and current sampling circuit 2, load trim circuits 1 changes the load of solar cell 4 under the effect of control signal, solar cell 4 terminal voltages and output current are changed; The size of described control signal makes load trim circuits 1 change to short circuit from open circuit; The load current of 2 pairs of solar cells 4 of current sampling circuit is taken a sample, and exports a voltage signal proportional to electric current; The terminal voltage of 3 pairs of solar cells 4 of voltage sample circuit is taken a sample, and exports a voltage signal proportional to terminal voltage.
Positive terminal voltage signal line L1, negative terminal voltage signal wire L2 are used for voltage sample circuit 3, anode current signal line L3, negative terminal current signal line L4 are used for adjustment of load and current sampling circuit 2, even there is so large electric current in the current measurement circuit, can not produce pressure drop at the circuit of voltage measurement circuit yet and cause measuring error.The line impedance of anode current signal line L3, negative terminal current signal line L4 is enough little, should calculate according to the size of length of arrangement wire, solar cell 4 short-circuit currents and open-circuit voltage, guarantees that the pressure drop of circuit when short-circuit current is no more than 3% of open-circuit voltage.
Described control signal is a variable magnitude of voltage, usually can be provided by the I-V data acquisition unit.The voltage range of control signal should make load trim circuits 1 change from open circuit to short circuit, and the voltage resolution of control signal can be determined according to required I-V number of data points.
Load trim circuits 1 changes the load of solar cell 4 under the effect of control signal, solar cell 4 terminal voltages and output current are changed.According to the size of control signal, load trim circuits 1 can change to short circuit from open circuit.Load trim circuits 1 usually is made of the MOSFET device, and this device must have low-down conducting resistance, usually should be less than 30m Ω, and suitable working current (a little more than the short-circuit current of solar cell), lower grid, source threshold voltage.
The load current of 2 pairs of solar cells 4 of current sampling circuit is taken a sample, and obtains a voltage signal proportional to electric current.Current sampling circuit 2 on the impact of solar cell 4 loads should be enough little (consider the line impedance of L3, L4, the pressure drop of guaranteeing circuit when short-circuit current be no more than open-circuit voltage 3%), to satisfy the test request of solar cell 4 short-circuit currents.Current sampling signal is exported in the mode of two-wire system, is conducive to the I-V data acquisition unit and improves accuracy of measurement.
The terminal voltage of 3 pairs of solar cells 4 of voltage sample circuit is taken a sample, and obtains a voltage signal proportional to terminal voltage.Voltage sample circuit 3 on the impact of the terminal voltage of solar cell 4 should be enough little (impedance should greater than 20k Ω/V * open-circuit voltage), to satisfy the test request of solar cell 4 open-circuit voltages.Voltage sampling signal is exported in the mode of two-wire system, is conducive to the I-V data acquisition unit and improves accuracy of measurement.
As shown in Figure 2, MOSFET device M has consisted of load trim circuits 1, the first resistance R 1 and has consisted of current sampling circuit 2, the second resistance R 2, the 3rd resistance R 3 have consisted of voltage sample circuit 3, I+, I-are current sampling signals, and V+, V-are voltage sampling signals, output to the I-V data acquisition unit.The I-V data acquisition unit is controlled this device, and the load of solar cell is changed once from being shorted between the open circuit, and simultaneously, current sampling signal and the voltage sampling signal of sampling under each reference mark obtains a pair of I-V data.This control procedure per minute carries out once, obtains one group of totally 20 pairs of I-V data at every turn, utilizes these group data can draw the I-V family curve of a solar cell.The physical circuit annexation is: MOSFET device M drain electrode connects anode current signal line L3, MOSFET device M source electrode connects an end of the first resistance R 1, the other end of the first resistance R 1 connects negative terminal current signal line L4, the first resistance R 1 two ends are output current sampled signal I+ respectively, I-is to the I-V data acquisition unit, MOSFET device M grid connection control signal is anodal, the control signal negative pole connects negative terminal current signal line L4, the second resistance R 2 one ends link to each other with the 3rd resistance R 3 one ends and output voltage sampled signal V+ to the I-V data acquisition unit, the second resistance R 2 other ends connect positive terminal voltage signal line L1, and the 3rd resistance R 3 other ends connection negative terminal voltage signal wire L2 and output voltage sampled signal V-are to the I-V data acquisition unit.
The present embodiment is for polysilicon, monocrystalline silicon, the thin-film solar cell panel of 2.5W, under the multiple mounting modes such as level installation, angle of latitude installation, uniaxiality tracking installation, double-axis tracking installation, carry out round-the-clock I-V feature measurement, per minute is obtained an I-V family curve, reach preferably effect, be fit to large-scale application in national solar energy resources research station.
Claims (6)
1. solar cell I-V characteristic is regulated and sampler, it is characterized in that: comprise load trim circuits (1), current sampling circuit (2), voltage sample circuit (3); Solar cell (4) accesses in the mode of four-wire system, anode and negative terminal are respectively drawn 2 lines, be respectively positive terminal voltage signal line (L1), negative terminal voltage signal wire (L2), anode current signal line (L3) and negative terminal current signal line (L4), wherein said positive terminal voltage signal line (L1), negative terminal voltage signal wire (L2) are connected to voltage sample circuit (3), anode current signal line (L3) is connected to load trim circuits (1), current sampling circuit (2) successively, is connected to negative terminal current signal line (L4); The positive and negative terminal of control signal is connected respectively to load trim circuits (1) and current sampling circuit (2), described control signal is a variable voltage, load trim circuits (1) changes the load of solar cell (4) under the effect of described control signal, solar cell (4) terminal voltage and output current are changed; The size of described control signal makes load trim circuits (1) change to short circuit from open circuit; Current sampling circuit (2) is taken a sample to the load current of solar cell (4), and exporting a voltage signal proportional to electric current is current sampling signal; Voltage sample circuit (3) is taken a sample to the terminal voltage of solar cell (4), and exporting a voltage signal proportional to terminal voltage is voltage sampling signal.
2. solar cell I-V characteristic is regulated and sampler as claimed in claim 1, it is characterized in that, the current sampling signal of described current sampling circuit (2) is exported in the mode of two-wire system.
3. solar cell I-V characteristic is regulated and sampler as claimed in claim 1, it is characterized in that, the voltage sampling signal of described voltage sample circuit (3) is exported in the mode of two-wire system.
4. solar cell I-V characteristic is regulated and sampler as claimed in claim 1, it is characterized in that, described load trim circuits (1) adopts a MOSFET device (M), MOSFET device (M) drain electrode connects anode current signal line (L3), MOSFET device (M) source electrode connects current sampling circuit (2), and MOSFET device (M) grid connects described control signal.
5. solar cell I-V characteristic is regulated and sampler as claimed in claim 1, it is characterized in that, described current sampling circuit (2) adopts the first resistance (R1), and positive and negative current sampling signal is exported respectively at the two ends of the first resistance (R1).
6. solar cell I-V characteristic is regulated and sampler as claimed in claim 1, it is characterized in that, described voltage sample circuit (3) comprises the second resistance (R2) and the 3rd resistance (R3) of serial connection, the order of connection is: positive terminal voltage signal line (L1) is connected to the second resistance (R2), be connected to the 3rd resistance (R3), be connected to negative terminal voltage signal wire (L2), positive and negative voltage sampling signal is exported respectively at the two ends of described the 3rd resistance (R3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012203603878U CN202710712U (en) | 2012-07-24 | 2012-07-24 | I-V characteristic adjusting and sampling device of solar cell |
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| CN2012203603878U CN202710712U (en) | 2012-07-24 | 2012-07-24 | I-V characteristic adjusting and sampling device of solar cell |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759696A (en) * | 2012-07-24 | 2012-10-31 | 江苏省无线电科学研究所有限公司 | Device for adjusting and sampling I-V characteristics of solar battery |
| CN106597247A (en) * | 2016-12-29 | 2017-04-26 | 西北核技术研究所 | Measuring system for volt-ampere characteristic curve of radiation effect semiconductor device based on four-probe method |
| CN107748303A (en) * | 2017-09-15 | 2018-03-02 | 西藏自治区能源研究示范中心 | A kind of portable photovoltaic device electric performance test system |
| CN109510591A (en) * | 2017-09-14 | 2019-03-22 | 南京优珈特新能源有限公司 | A kind of Online Transaction Processing and its control method of photovoltaic DC power generation array |
| WO2023015782A1 (en) * | 2021-08-11 | 2023-02-16 | 杭州联芯通半导体有限公司 | Testing circuit applied to photovoltaic system having quick shutdown mechanism |
-
2012
- 2012-07-24 CN CN2012203603878U patent/CN202710712U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759696A (en) * | 2012-07-24 | 2012-10-31 | 江苏省无线电科学研究所有限公司 | Device for adjusting and sampling I-V characteristics of solar battery |
| CN106597247A (en) * | 2016-12-29 | 2017-04-26 | 西北核技术研究所 | Measuring system for volt-ampere characteristic curve of radiation effect semiconductor device based on four-probe method |
| CN109510591A (en) * | 2017-09-14 | 2019-03-22 | 南京优珈特新能源有限公司 | A kind of Online Transaction Processing and its control method of photovoltaic DC power generation array |
| CN107748303A (en) * | 2017-09-15 | 2018-03-02 | 西藏自治区能源研究示范中心 | A kind of portable photovoltaic device electric performance test system |
| WO2023015782A1 (en) * | 2021-08-11 | 2023-02-16 | 杭州联芯通半导体有限公司 | Testing circuit applied to photovoltaic system having quick shutdown mechanism |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20191218 Address after: 214000 28 Weiming Road, Binhu District, Wuxi City, Jiangsu Province Patentee after: Aerospace new weather Technology Co.,Ltd. Address before: Jinxi road Binhu District 214125 Jiangsu city of Wuxi province No. 100 Patentee before: JIANGSU PROVINCE RADIO SCIENTIFIC RESEARCH INSTITUTE Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |