CN105334468B - Solar cell capacitance waving map device and test method - Google Patents
Solar cell capacitance waving map device and test method Download PDFInfo
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Abstract
The invention discloses a kind of solar cell capacitance waving map device and test method, which includes：DC power supply；Pulse generating circuit；Field-effect tube；ON-OFF control circuit；Testing resistance.The test device mainly controls field-effect tube by pulse generating circuit and the complementary of ON-OFF control circuit is opened, when ON-OFF control circuit is opened, DC power supply is to solar cell capacitor charging, when ON-OFF control circuit is closed, the solar cell capacitance being electrically charged is discharged by testing resistance and field-effect tube, the discharge current of testing resistance is monitored by first oscillograph in parallel with testing resistance, the discharge voltage of solar cell is monitored by second oscillograph in parallel with solar cell simultaneously, the equivalent capacity of solar cell is calculated.The test method has the advantages that hardware configuration is simple, efficient, accuracy is high, can apply in solar cell for space use monomer or Satellite vapour image test.
Description
Technical field
The present invention relates to technical field of solar cells, more particularly to a kind of solar cell capacitance waving map device and survey
Method for testing.
Background technology
For current communications satellite field, the main energy comes from solar cell, the capacitance dynamic parameter of solar cell
It is one of important parameter for one reliable, effective solar cell for space use square formation of design.Understand the electricity of solar cell
It is required for the reliability of design space sun square formation switching capability size and adjusting control device to hold dynamic behaviour.It is directly
Influence the interface compatibility of power-supply controller of electric in solar cell for space use battle array.
Solar cell is a kind of active device, and selfcapacity is continually changing with illumination and external voltage, and capacitance is
A dynamic nonlinear capacitance cannot use general test equipment such as LRC testers or general-purpose for surveying static P-N junction capacitance
Table etc. is tested.
Testing solar battery capacitance, which uses, in the world at present is tested using impedance spectroscopy using vector network analyzer
Its frequency domain capacitance obtains the equivalent capacity of solar cell, and this frequency domain technique is by being applied to small signal communication operating point in frequency
Response within the scope of domain obtains the capacitance of solar cell.But the means of testing, it is expensive using instrument and equipment such as Network Analyzer,
Data processing is considerably complicated, needs to make repeatedly to integrate in frequency domain to iterate, data need to make repeatedly to correct.
Invention content
The technical problem to be solved by the present invention is to：A kind of solar cell capacitance waving map device and test method are provided.
The solar cell capacitance waving map device and test method, compared to frequency domain test, are had hard by the way of waving map
Part advantage simple in structure, compared to frequency domain test method, have the advantages that testing efficiency is high.
The present invention is adopted the technical scheme that solve technical problem present in known technology：
A kind of solar cell capacitance waving map device, includes at least：
The voltage regulation limits of DC power supply, the DC power supply are 0V~20V；
The control terminal Port1 of pulse generating circuit, the pulse generating circuit is electrically connected with the grid of field-effect tube Q,
The pulse generating circuit is used to control the switch of driving FET Q, while controlling the switch of the ON-OFF control circuit；
The access that field-effect tube Q, field-effect tube Q are used to discharge after the solar cell is saturated；
ON-OFF control circuit, the ON-OFF control circuit include the control terminal being electrically connected with pulse generating circuit leading-out terminal
Port1, with the electricity taking terminal VCC of DC power supply leading-out terminal electrical connection, the direct current that is connect with Constant Direct Current power output end
Source Vd, the terminals P ort2 being electrically connected with the drain electrode of field-effect tube Q；Control terminal Port1 passes through the 4th resistance R4 and the 4th
The emitter of PNP triode T4 is electrically connected, the base earth of the 4th PNP triode T4, the current collection of the 4th PNP triode T4
Pole is electrically connected by the 5th resistance R5 with the base stage of third NPN triode T3；The emitter of third NPN triode T3 connects direct current
Power supply Vd is -5V, and the 5th resistance R5 is electrically connected by the 6th resistance R6 with the emitter of third NPN triode T3；3rd NPN
The collector of triode T3 is electrically connected by the tenth resistance R10 with electricity taking terminal VCC；Tri- pole electricity taking terminal VCC and the first PNP
The emitter of pipe T1 is electrically connected, and the collector of first PNP triode T1 is electrically connected with the anode of diode D1, diode D1
Cathode is electrically connected by first resistor R1 with terminals P ort2；The base stage of first PNP triode T1 passes through the 8th resistance R8 and
The collector of two NPN triode T2 is electrically connected；The collector of the base stage and third NPN triode T3 of second NPN triode T2
Electrical connection；It is -5V that the emitter of second NPN triode T2, which meets DC power supply Vd,；The base stage and hair of second NPN triode T2
The 7th resistance R7 is connected between emitter-base bandgap grading；It is connected with the 9th resistance between electricity taking terminal VCC and the base stage of the first PNP triode T1
R9；
The terminals P ort2 is electrically connected with the drain electrode of field-effect tube Q；
The drain electrode of the field-effect tube Q, testing resistance Rs, solar cell S, the field-effect tube Q source electrode be sequentially connected in series
Form the first circuit；
DC power supply, ON-OFF control circuit, the drain electrode of field-effect tube Q, testing resistance Rs, solar cell S form second servo loop；
First oscillograph, first oscillograph are in parallel with testing resistance Rs；
Second oscillograph, second oscillograph are in parallel with solar cell S.
A kind of test method of solar cell capacitance waving map device, includes the following steps：
Step 1: above-mentioned solar cell capacitance waving map device and solar cell are placed in experimental situation, above-mentioned reality
It includes following parameter to test environment：21 DEG C~23 DEG C of temperature range, illumination range is 0~10-4Lx；
Step 2: circuit occurs for unbalanced pulse, which exports square-wave signal；Adjust the output electricity of DC power supply
Pressure, it is 0.2V to make the solar cell both end voltage that the second oscillograph monitors, and utilizes the first oscillograph recording testing resistance Rs at this time
The discharge curve that both end voltage changes over time changes over time curve using the second oscillograph recording solar cell voltage；
Step 3: the electric discharge result of the first oscillograph test testing resistance Rs is plotted in a two-dimensional coordinate system；It should
The axis of abscissas of two-dimensional coordinate system is the time；Axis of ordinates is the voltage at the both ends testing resistance Rs；And then multiple discrete points are formed,
Discrete point is in turn connected to form the first curve according to time point sequencing, which is testing resistance Rs both end voltages
Curve U-t is changed over time, the ordinate value difference of discrete point in first curve divided by the resistance value of testing resistance Rs obtain
Ordinate value be the electric current for flowing through Rs, with the current value for new ordinate, the abscissa value of former discrete point repaints song
Line obtains the second curve, which is to change over time curve I-t by testing resistance Rs electric currents；
Step 4: utilizing the second curve acquisition solar cell capacitance electric discharge total electricity Q1, second curve and time shaft it
Between the area that surrounds, as solar cell capacitance electric discharge total electricity Q1；
Step 5: adjusting the output voltage of DC power supply, keep the both end voltage of the solar cell of the second oscillograph monitoring each
Increase Δ a V, until n-th, wherein：N is integer, and 1≤n≤1+Voc/ a, Voc are solar batteries；
Step 6: repeating Step 1: Step 2: Step 3: step 4 and step 5, it is total to respectively obtain solar cell electric discharge
Electricity Q1,Q2…Qn；Obtain solar cell capacitance discharge voltage U simultaneouslyn=0.2+a* (n-1)；
Step 7: the equivalent capacity of solar cell is calculated using following equation：Cn=Qn/Un；Wherein：CnIt is equivalent
Capacitance；QnFor total electricity；The Cn that n times measure is averaged to obtain the equivalent capacity for needing solar cell to be tested.
The invention has the advantages and positive effects that：
1, the present invention uses waving map method, does not need the expensive devices such as Network Analyzer, it is only necessary to design switch electricity
The data acquisition equipments such as road and conversion circuit, variable power supply and oscillograph, data handling procedure is opposite to use frequency domain test method
Many integral iterations are not needed simply, it is only necessary to which line integral is handled several times, and the test process time is shorter, is particularly suitable for measuring one
The alternating-current parameter of a little nonlinear devices, can apply the test in solar cell monomer or solar battery array equivalent capacity.
2, accuracy is higher：Test result is compared with use vector network analyzer frequency domain test result, as a result substantially
Unanimously, mean error 2.3%.
3, it is widely used：This test method can be widely applied to the inspection and survey of space system satellite sun array solar cell
Examination ensures the reliable of space cell square formation.
Description of the drawings：
Fig. 1 is the circuit block diagram of the preferred embodiment of the present invention；
Fig. 2 is the physical circuit figure of preferred embodiment of the present invention；
Fig. 3 is the ON-OFF control circuit schematic diagram of the preferred embodiment of the present invention；
Fig. 4 is the pulse generating circuit schematic diagram of the preferred embodiment of the present invention；
Fig. 5 is the testing resistance both ends for using test method of the present invention under solar cell difference bias, solar cell two
The change curve of end and pulse output；
Fig. 6 is the result tested out to the GaAs solar cells that number is 5E684-9-2 using the present invention.
Specific implementation mode
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and coordinate attached drawing
Detailed description are as follows：
Refering to fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of solar cell capacitance waving map device, including：
The voltage regulation limits of DC power supply, the DC power supply are 0V~20V；
The control terminal Port1 of pulse generating circuit, the pulse generating circuit is electrically connected with the grid of field-effect tube Q,
The pulse generating circuit is used to control the switch of driving FET Q, while controlling the switch of the ON-OFF control circuit；
The access that field-effect tube Q, field-effect tube Q are used to discharge after the solar cell is saturated；
ON-OFF control circuit, the ON-OFF control circuit include the control terminal being electrically connected with pulse generating circuit leading-out terminal
Port1, with the electricity taking terminal VCC of DC power supply leading-out terminal electrical connection, the direct current that is connect with Constant Direct Current power output end
Source Vd, the terminals P ort2 being electrically connected with the drain electrode of field-effect tube Q；Control terminal Port1 passes through the 4th resistance R4 and the 4th
The emitter of PNP triode T4 is electrically connected, the base earth of the 4th PNP triode T4, the current collection of the 4th PNP triode T4
Pole is electrically connected by the 5th resistance R5 with the base stage of third NPN triode T3；The emitter of third NPN triode T3 connects direct current
Power supply Vd is -5V, and the 5th resistance R5 is electrically connected by the 6th resistance R6 with the emitter of third NPN triode T3；3rd NPN
The collector of triode T3 is electrically connected by the tenth resistance R10 with electricity taking terminal VCC；Tri- pole electricity taking terminal VCC and the first PNP
The emitter of pipe T1 is electrically connected, and the collector of first PNP triode T1 is electrically connected with the anode of diode D1, diode D1
Cathode is electrically connected by first resistor R1 with terminals P ort2；The base stage of first PNP triode T1 passes through the 8th resistance R8 and
The collector of two NPN triode T2 is electrically connected；The collector of the base stage and third NPN triode T3 of second NPN triode T2
Electrical connection；It is -5V that the emitter of second NPN triode T2, which meets DC power supply Vd,；The base stage and hair of second NPN triode T2
The 7th resistance R7 is connected between emitter-base bandgap grading；It is connected with the 9th resistance between electricity taking terminal VCC and the base stage of the first PNP triode T1
R9；
The terminals P ort2 is electrically connected with the drain electrode of field-effect tube Q；
The drain electrode of the field-effect tube Q, testing resistance Rs, solar cell S, the field-effect tube Q source electrode be sequentially connected in series
Form the first circuit；
DC power supply, ON-OFF control circuit, the drain electrode of field-effect tube Q, testing resistance Rs, solar cell S form second servo loop；
First oscillograph, first oscillograph are in parallel with testing resistance Rs；
Second oscillograph, second oscillograph are in parallel with solar cell S.
In above preferred embodiment：The solar cell by coaxial cable respectively with the source electrode of field-effect tube Q, to be measured
Resistance Rs connections.
The test philosophy of above preferred embodiment is as follows：The output end output of pulse generating circuit is the height that duty ratio is 1
The output end of low level, pulse generating circuit is electrically connected with the grid of the Enable Pin of ON-OFF control circuit and field-effect tube respectively,
When the output of pulse generating circuit is low level, ON-OFF control circuit is enabled and is connected, and at the same time field-effect tube is ended, directly
Galvanic electricity source by ON-OFF control circuit, testing resistance, to solar cell capacitor charging to be saturated, when pulse generating circuit signal is
When high level, the cut-off of ON-OFF control circuit Enable Pin, at the same time field-effect tube unlatching, the solar cell electricity being fully charged before
Appearance is discharged by testing resistance, field-effect tube, in the discharge process, utilizes the electric discharge of the first oscillograph recording testing resistance
Curve is carried out the discharge curve of the first oscillograph testing resistance using the discharge voltage of the second oscillograph recording solar cell
Numerical integration obtains the total electricity Δ Q that solar cell discharges on testing resistance, and solar cell is obtained by the second oscillograph
Discharge voltage Δ U is obtained the dynamic capacity of solar cell by formula C=Δ Q/ Δs U.
Referring to Fig. 2, in the pulse generating circuit：Port1 is used to control the switch of driving FET Q, same to time control
The switch for making T3 in the ON-OFF control circuit makes third NPN triode T3 open and be closed with field-effect tube Q complementations；
Referring to Fig. 3, in ON-OFF control circuit：First resistor R1 is used for current-limiting resistance, and diode D1 is for preventing the sun
Battery S capacitances discharge to power supply VCC, and solar cell is made only to discharge the field-effect tube Q of diverter branch.Triode T4 is used for
Current potential translates, and the first PNP triode T1, the second NPN triode T2, third NPN triode T3 forms switching circuit, by Port1
Impulse generator control, while ensureing the first PNP triode T1, the second NPN triode T2, third NPN triode T3 and field
Effect pipe Q complementations are opened and are closed, and the 9th resistance R9 ensure that the first PNP triode T1's moves back saturation.Emitter connects direct current
The negative supply that source Vd sizes are -5V ensures that 0 level of the first PNP triode T1 pipes is opened.
In above-mentioned specific embodiment：The test method of solar cell capacitance waving map device, mainly includes the following steps：
1, circuit is established：What the solar cell in the preferred embodiment selected is GaAs solar cells.To reduce due to making an uproar
The influence of sound should use short coaxial cable to connect solar cell.DC power supply output voltage is adjusted, test GaAs solar cells are made
Voltage is 0.2V.When pulse generating circuit output is low level, ON-OFF control circuit is opened, while the field-effect of diverter branch
Pipe is in cut-off state, and solar cell capacitor charging to being saturated, solar cell both ends electricity is detected with the second oscillograph by DC power supply
The continuous variation of pressure.When pulse generating circuit output is high level, ON-OFF control circuit cut-off, while the field effect of diverter branch
Should pipe open, solar cell capacitance discharges to the field-effect tube of diverter branch, the transient current discharge time and electric discharge electricity
Stream can wait for that the first oscillograph both ends of resistance obtain from surveying.DC power supply voltage is adjusted, test GaAs solar cell voltages point are made
Not Wei 0.4V, 0.6V, 0.8V, 1V, record respectively the first oscillograph test testing resistance voltage change, record the second oscillography
The variation of device solar cell voltage.
2, data processing：Solar cell capacitance can be obtained by data processing to the discharge current of testing resistance at any time
Change curve, the region below the curve is exactly total electricity Q, divided by corresponding solar cell bias obtains the equivalent electricity of battery
Hold.By taking Fig. 5 a as an example, DC power supply voltage is adjusted, it is 0.2V, unbalanced pulse circuit, the impulse circuit to make solar cell both end voltage
Output short dash line as shown in Figure 5 a, from as shown in Figure 5 a long empty of the second oscillograph acquisition solar cell both ends variation voltage
Line, the solid line from the acquisition testing resistance both end voltage variation as shown in Figure 5 a of the first oscillograph.By the testing resistance in Fig. 5 a
Curve individually take out, be multiple discrete points, the ordinate of discrete point is testing resistance both end voltage, by the vertical seat of discrete point
The resistance value of mark difference divided by the resistance, obtains the electric current of multiple discrete points, using obtained electric current as ordinate, with former discrete point
Abscissa repaints curve, obtains the second curve, which is to change over time curve by testing resistance electric current, should
The area surrounded between curve and time shaft is electric discharge total electricity Q1 under the 0.2V.This envelope surface product can be obtained by line integral
It arrives.The electric discharge total electricity Q1 divided by 0.2V that are obtained under 0.2V are obtained to the capacitance of solar cell under 0.2V.
Fig. 5 b, Fig. 5 c, Fig. 5 d are to adjust DC power supply respectively, make solar cell both end voltage for 0.4V, under 0.6V, 0.8V
Test result.To the above test result using the method described in Fig. 5 a, the sun electricity under several different voltages can be calculated
The capacitance in pond is averaged all capacitances being calculated, obtains the capacitance of the solar cell to be measured.
This tests the capacitance of space GaAs solar cells, due to capacitance and the battery both end voltage square of the battery
Root is inversely proportional.Discharge curve only need to be integrated once.
3, the data precision：To test the accuracy of the test method, direct capacitance device is distinguished using this method big
Small is 0.21uF, and three capacitors of 0.47uF, 0.95uF are tested, and direct current DC biass are from 0.2 to 1V, step interval
0.2V.Obtained test result is compared with proven capacitor element, as a result almost the same.In addition vector network is used
Analyzer tests response of the small signal communication operating point of 10 solar cells in frequency domain, is carried out in the response of frequency domain more
The secondary solar cell capacity measurement result iterated that integrates is compared with the time domain approach progress test result that invention uses,
Mean error is only 2.3%.
4, test result：The GaAs solar cells for being 5E684-9-2 to number test out that the results are shown in Figure 6, the knot
Fruit is consistent with the previous result using Network Analyzer test.The test method can be used for space system satellite sun array battery
Inspection and test, ensure solar cell for space use battle array reliability.
The GaAs solar cells given are tested with the test method of the solar cell capacitance waving map device, are had
Body following steps：
Step 1: above-mentioned solar cell capacitance waving map device and solar cell are placed in experimental situation, above-mentioned reality
It includes following parameter to test environment：21 DEG C~23 DEG C of temperature range, illumination range is 0~10-4Lx；
Step 2: circuit occurs for unbalanced pulse, output is allowed to as stable square wave.The output voltage for adjusting DC power supply, makes
The solar cell both end voltage of second oscillograph monitoring is 0.2V, utilizes the first both ends oscillograph recording testing resistance Rs electricity at this time
The discharge curve changed over time is pressed, curve is changed over time using the second oscillograph recording solar cell voltage.
Step 3: the electric discharge result of the first oscillograph test testing resistance Rs is plotted in a two-dimensional coordinate system；It should
The axis of abscissas of two-dimensional coordinate system is the time；Axis of ordinates is the voltage at the both ends testing resistance Rs；And then multiple discrete points are formed,
Discrete point is in turn connected to form the first curve according to time point sequencing, which is testing resistance Rs both end voltages
Curve U-t is changed over time, the ordinate value difference of discrete point in first curve divided by the resistance value of testing resistance Rs obtain
Ordinate value be the electric current for flowing through Rs, with the current value for new ordinate, the abscissa value of former discrete point repaints song
Line obtains the second curve, which is to change over time curve I-t by testing resistance Rs electric currents；
Step 4: utilizing the second curve acquisition solar cell capacitance electric discharge total electricity Q1, second curve and time shaft it
Between the area that surrounds, as solar cell capacitance electric discharge total electricity Q1；5 is taken for the discharge time of this example GaAs solar cells ×
10-4s；
Step 5: adjusting the output voltage of DC power supply, make the both end voltage difference of the solar cell of the second oscillograph monitoring
For 0.4V, 0.6V, 0.8V, 1V；Respectively repeat steps one, Step 2: step 3 and step 4, respectively obtain solar cell electric discharge
Total electricity Q2,Q3,Q4,Q5；It is respectively U to obtain solar cell capacitance discharge voltage U simultaneously1=0.2V, U2=0.4V, U3=
0.6V, U4=0.8V, U5=1V；
Step 6: the equivalent capacity of solar cell is calculated using following equation：C=1/5* (Q1/U1+Q2/U2+Q3/U3
+Q4/U4+Q5/U5)。
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,
It should not be construed as limiting the practical range of the present invention.Any changes and modifications in accordance with the scope of the present application,
It should all still fall within the scope of the patent of the present invention.
Claims (3)
1. a kind of solar cell capacitance waving map device, it is characterised in that：It includes at least：
The voltage regulation limits of DC power supply, the DC power supply are 0V~20V；
The control terminal Port1 of pulse generating circuit, the pulse generating circuit is electrically connected with the grid of field-effect tube Q, described
Pulse generating circuit is used to control the switch of driving FET Q, while controlling the switch of ON-OFF control circuit；
The access that field-effect tube Q, field-effect tube Q are used to discharge after the solar cell is saturated；
ON-OFF control circuit, the ON-OFF control circuit include the control terminal being electrically connected with pulse generating circuit leading-out terminal
Port1, with the electricity taking terminal VCC of DC power supply leading-out terminal electrical connection, the direct current that is connect with Constant Direct Current power output end
Source Vd, the terminals P ort2 being electrically connected with the drain electrode of field-effect tube Q；Control terminal Port1 passes through the 4th resistance R4 and the 4th
The emitter of PNP triode T4 is electrically connected, the base earth of the 4th PNP triode T4, the current collection of the 4th PNP triode T4
Pole is electrically connected by the 5th resistance R5 with the base stage of third NPN triode T3；The emitter of third NPN triode T3 connects direct current
Power supply Vd is -5V, and the 5th resistance R5 is electrically connected by the 6th resistance R6 with the emitter of third NPN triode T3；3rd NPN
The collector of triode T3 is electrically connected by the tenth resistance R10 with electricity taking terminal VCC；Tri- pole electricity taking terminal VCC and the first PNP
The emitter of pipe T1 is electrically connected, and the collector of first PNP triode T1 is electrically connected with the anode of diode D1, diode D1
Cathode is electrically connected by first resistor R1 with terminals P ort2；The base stage of first PNP triode T1 passes through the 8th resistance R8 and
The collector of two NPN triode T2 is electrically connected；The collector of the base stage and third NPN triode T3 of second NPN triode T2
Electrical connection；It is -5V that the emitter of second NPN triode T2, which meets DC power supply Vd,；The base stage and hair of second NPN triode T2
The 7th resistance R7 is connected between emitter-base bandgap grading；It is connected with the 9th resistance between electricity taking terminal VCC and the base stage of the first PNP triode T1
R9；
The terminals P ort2 is electrically connected with the drain electrode of field-effect tube Q；
The drain electrode of the field-effect tube Q, testing resistance Rs, solar cell S, the field-effect tube Q source electrode be sequentially connected in series
First circuit；
DC power supply, ON-OFF control circuit, the drain electrode of field-effect tube Q, testing resistance Rs, solar cell S form second servo loop；
First oscillograph, first oscillograph are in parallel with testing resistance Rs；
Second oscillograph, second oscillograph are in parallel with solar cell S.
2. solar cell capacitance waving map device according to claim 1, it is characterised in that：The solar cell passes through
Coaxial cable is connect with the source electrode of field-effect tube Q, testing resistance Rs respectively.
3. a kind of test method based on solar cell capacitance waving map device described in claims 1 or 2, it is characterised in that：
Include the following steps：
Step 1: above-mentioned solar cell capacitance waving map device and solar cell are placed in experimental situation, above-mentioned experimental ring
Border includes following parameter：21 DEG C~23 DEG C of temperature range, illumination range is 0~10-4Lx；
Step 2: circuit occurs for unbalanced pulse, which exports square-wave signal；The output voltage of DC power supply is adjusted,
It is 0.2V to make the solar cell both end voltage that the second oscillograph monitors, and utilizes the first both ends oscillograph recording testing resistance Rs at this time
The discharge curve that voltage changes over time changes over time curve using the second oscillograph recording solar cell voltage；
Step 3: the electric discharge result of the first oscillograph test testing resistance Rs is plotted in a two-dimensional coordinate system；The two dimension
The axis of abscissas of coordinate system is the time；Axis of ordinates is the voltage at the both ends testing resistance Rs；And then multiple discrete points are formed, it will be from
Scatterplot is in turn connected to form the first curve according to time point sequencing, first curve be testing resistance Rs both end voltages at any time
Between change curve U-t, respectively divided by the resistance value of testing resistance Rs by the ordinate value of discrete point in first curve, what is obtained is vertical
Coordinate value is the electric current for flowing through Rs, and with the current value for new ordinate, the abscissa value of former discrete point repaints curve,
The second curve is obtained, which is to change over time curve I-t by testing resistance Rs electric currents；
Step 4: utilizing the second curve acquisition solar cell capacitance electric discharge total electricity Q1, surrounded between second curve and time shaft
Area, as solar cell capacitance electric discharge total electricity Q1；
Step 5: adjusting the output voltage of DC power supply, the both end voltage of the solar cell of the second oscillograph monitoring is made to increase every time
Δ a V, until n-th, wherein：N is integer, and 1≤n≤1+Voc/ a, Voc are solar batteries；
Step 6: repeating Step 1: Step 2: Step 3: step 4 and step 5, respectively obtain solar cell electric discharge total electricity
Q1,Q2…Qn；Obtain solar cell capacitance discharge voltage U simultaneouslyn=0.2+a* (n-1)；
Step 7: the equivalent capacity of solar cell is calculated using following equation：Cn=Qn/Un；Wherein：CnFor equivalent capacity；
QnFor total electricity；The Cn that n times measure is averaged to obtain the equivalent capacity for needing solar cell to be tested.
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| CN113612442B (en) * | 2021-06-28 | 2023-02-28 | 上海空间电源研究所 | Electromagnetic pulse injection solar cell test device |
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